CN207161632U - A kind of power take-off mechanism of caterpillar tractor - Google Patents

Abstract

A kind of dynamical system of caterpillar tractor, including engine, clutch, input shaft and driving wheel walking mechanism, in addition to dynamic branch mechanism and power take-off mechanism.The utility model is compact-sized, easy to use, and the output shaft structural strength lifting, the concentricity of its bearing position is guaranteed, is hardly damaged, and transmission efficiency improves；Having the advantages of convenient, simple in terms of part disassembling, assembling and replacing, and maintenance difficulty and cost is greatly reduced.

Description

A kind of power take-off mechanism of caterpillar tractor

Technical field

Tractor dynamic power assembly technical field is the utility model is related to, specifically a kind of dynamical system of caterpillar tractor System.

Background technology

At present, the problem of domestic caterpillar tractor generally existing power output shaft performance is unstable, service life is short. In real work, output shaft occurs that relatively large deviation occurs in axle upper bearing (metal) concentricity after long-term use, and output shaft is rotating While have the swing of circumference, very big burden is caused to axle and casing, off-axis even casing can be frequently produced and be torn The phenomenon split；And actual tests show, in many cases, even if concentricity still more standard, tractor is when work Output shaft still suffers from the situation for being unable to bear moment of torsion and being easily damaged.It is just several and the output shaft of these tractors once damages Obtain and whole gearbox is taken apart and could changed, the factor such as high spoilage, high maintenance difficulty greatly reduces the work of agricultural production Make efficiency, add job costs.

On the other hand, rotating control is realized in the walking mechanism generally use variable speed of speed-changing gear box domestic at present System, it is easy to operate although so simple in construction, it can find that HST is in working condition for a long time in actual use, inside it Oil temperature rise, oil will be influenceed, and then have influence on the stability of transmission；Simultaneously as the limitation of HST transmissions, gear Gearbox possesses several drive shifts, just has several reverse drive gears.However, agricultural machinery is in routine duties, nearly all it is to use into shelves Operation, the use of to time of shelves is moved back is seldom.Therefore, HST application seems unnecessary that stability also has much room for improvement again.At it In terms of his such as braking in a turn, at present also all there are more, the difficult reparations of failure in most domestic similar to the speed-changing gear box of model Problem.

Patent document such as Application No. 2012205013875 discloses a kind of rubber crawler tractor, including frame, frame Bottom be provided with driving wheel, moping pulley, rubber belt track expansion tightening wheel and float support wheel, driving wheel, moping pulley, rubber belt track tensioner Rubber belt track is wound with wheel and float support wheel；Position in frame close to frame top is provided with tensioner wheeling supporting frame, rubber Track tensioning wheel is arranged on tensioner wheeling supporting frame；Position in frame close to bottom of the frame is provided with floating support wheel support, floats Dynamic support wheel is arranged on floating support wheel support；Frame is provided with engine, and the driving engine connection power output becomes Fast case clutch, power output speed changing box clutch transmission connect power output speed changing box, have power defeated on power output speed changing box Shaft, driving engine connection reversing box, reversing box drive connection reversing box output pulley, the drive connection of reversing box output pulley There is a gearbox, gearbox is connected with driving wheel, and it is big that it still has fragile, structural instability, cost input, therefore urgently A kind of new improvement project solves foregoing problems.

Utility model content

Technical purpose of the present utility model is to provide a kind of dynamical system of caterpillar tractor solve conventional track formula The problem of tractor structure stability is poor, spoilage is high, maintenance cost and difficulty are big.

Concrete technical scheme of the present utility model is as follows：A kind of dynamical system of caterpillar tractor, including engine, from Clutch and input shaft, in addition to dynamic branch mechanism, power take-off mechanism and driving wheel walking mechanism；

The dynamic branch mechanism includes the dynamic branch axle of the connection input shaft, on the dynamic branch axle Power output driving gear and HST power input driving gear；

The power take-off mechanism include be divided to three sections set and it is adjacent two sections be connected output shaft, located at the output Power output driven gear on axle and the output on the output shaft and between the power output driven gear Axle engaging sleeve, the power output driven gear engage connection with the power output driving gear；

The driving wheel walking mechanism include be connected successively HST power input shafts, variable-speed shaft, counter shaft, turn To axle, deboost axle and drive shaft, the HST power input shafts and the variable-speed shaft common driving are connected with HST hydrostatic transmissions Device, HST power input shafts are connected with the dynamic branch axle, pass through the HST hydrostatic transmissions device and the HST power Input shaft realizes the power transmission to the variable-speed shaft respectively.

Preferably, the HST power input shafts are provided with HST power input driven gear and variable-speed dynamic input actively Gear, the HST power input driven gear engage connection with HST power input driving gear；

It is defeated that the variable-speed shaft is provided with variable-speed dynamic input driven gear, variable-speed dynamic output driving gear and HST power Go out driven gear, the first speed change is provided between the variable-speed dynamic input driven gear and the HST power outputs driven gear Axle engaging sleeve, is provided with the second variable-speed shaft engaging sleeve between variable-speed dynamic output driving gear, the variable-speed dynamic input from Moving gear engages connection with variable-speed dynamic input driving gear；

The HST hydrostatic transmissions device is provided with the power transmission shafts of HST first being connected with the HST power input shafts and carried The HST second driving shafts of HST power output driving gears, the HST power outputs driving gear and the HST power outputs from Moving gear engagement connection；

The counter shaft is provided with variable-speed dynamic output driven gear and steering power input driving gear, the speed change Power output driven gear engages connection with variable-speed dynamic output driving gear；

The steering spindle is provided with steering power input driven gear and retarding power input driving gear, and described turn to is moved Power inputs driven gear and engages connection with steering power input driving gear；

The deboost axle is provided with retarding power input driven gear and driving power input driving gear, and described slow down moves Power inputs driven gear and engages connection with retarding power input driving gear；

The drive shaft is provided with driving power input driven gear, the driving power input driven gear and the drive Dynamic power input driving gear engagement connection.

The HST power input driving gear and HST power input driven gear selection bevel gear, and it is such as described Other gears such as variable-speed dynamic input driving gear, variable-speed dynamic input driven gear select spur gear or helical gear, Optimize drive mechanism design and transmission effect, power transmission are actually implemented as by hydraulic pressure and mechanical two ways, so can be with Complete to set the quantity of forward range by being mechanically and hydraulically driven, the quantity to retreating gear is only completed by hydraulic drive Set, optimize ongoing operations gear and use gear less, mitigate the HST hydrostatic transmissions device live load, meet agricultural work Need, optimization gearbox speed is than setting.

Preferably, the output shaft includes output shaft leading portion, output shaft stage casing and output shaft back segment, before the output shaft Section is connected and indirect connection with the output shaft stage casing by the first spline housing, the output shaft stage casing and the output shaft Back segment is connected and indirect connection by the second spline housing.

While first spline housing and second spline housing realization are stably connected with so that have to the concentricity of bearing There is certain correction effect, also there is a positioning action to axle, and it is long and cause asking for rigidity deficiency to solve power output shaft Topic, strengthen support and fixed effect, also allow for dismounting.

Preferably, first spline housing and/or second spline housing are provided with least two spline housing bearings.

The spline housing bearing is strengthened to first spline housing and the described second flower to realize rotation connection necessary parts The support and fixation of key set, that is to say the support and fixation strengthened to axle, and the spline housing bearing set up also complements each other, and protect The stabilization of concentricity is demonstrate,proved, also allows for dismounting.

Preferably, the output shaft back segment is connected with end connecting shaft, double cone roller bearing and taper roll bearing Seat, the end connecting shaft, the double cone roller bearing and the taper roll bearing seat integrally connected and can with it is described defeated Shaft back segment is separated or installed in the lump.

The end connecting shaft, the double cone roller bearing and the taper roll bearing seat integral structure, are used for Radial load preferably is born, dismounting fabrication hole can be increased, it is not being dismantled other gearboxes zero when repairing replacing In the case of part, easily disassembling operations are realized.

Preferably, the output shaft leading portion, the axial length of the output shaft back segment are respectively less than the axle in the output shaft stage casing It is long.

Output shaft leading portion, output shaft back segment are due to that can bear the load of gear engagement or the load of output operation, therefore To ensure that it is short that it rigidly just does, and stage casing mainly plays a part of to transmit moment of torsion.

It is used to avoid the buffer disc for turning to return rigid shock preferably, the steering spindle is provided with.

In braking in a turn, the buffer disc causes gearbox having certain buffering after completing to brake and when restarting Effect, so as to realize its soft start, protection parts are not easy the damage that is hit, lift structure stability.Buffer disc is detachable , buffer disc bears moment of torsion, and only need to change buffer disc after damage drops significantly without scrapping whole gear, maintenance cost It is low.

Preferably, the end of the drive shaft is connected with counter flange, driving wheel is directly mounted at the counter flange On.

Traditional driving wheel is directly connected on the driving shaft, the place maximum as whole gearbox torque, on driving wheel Connecting key seem not firm, once and connecting key is broken, drive shaft connection end and driving wheel scrap, and this is quite unfortunate Something, driving wheel, which is directly installed on counter flange, by counter flange can effectively avoid the problem, if impacting Damage need to only change a piece of driving flange, reduce maintenance costs.

Preferably, the power output driving gear, the power output driven gear, the variable-speed dynamic output master Moving gear, variable-speed dynamic output driven gear each include high speed shift gear and low gear gear.

Preferably, the HST power input driving gear is bevel gear with HST power input driven gear, Remaining gear is spur gear and/or helical gear.

Applicant has found by development test, the problem of conventional track formula tractor output shaft largely with output shaft Length it is relevant.Traditional output shaft make it that its length is larger because complete machine structure needs, and output shaft upper bearing (metal) is concentric Degree requires very high, but just because of the length of output shaft, the concentricity of bearing just cannot be guaranteed.Therefore in actual use, Output shaft rotation while also with circumference to swing, very big burden is caused to axle and casing, frequently occurs off-axis very To being phenomenon that casing is torn；In addition, the tip of the axis is exported in normal work can bear sizable shock loading, to case Body and output shaft produce larger pressure, even if concentricity is still in the reasonable scope, power is also resulted in while output shaft is long Arm is long, moment of torsion is excessive, and here it is output shaft in the preferable situation of bearing concentricity, the reason for being still easily damaged.It is and this Very long output shaft is just forced once damaging and haves no alternative but whole gearbox to take apart, then carries out whole section of replacing.Its comprehensive spoilage High, maintenance difficulty it is big because, traditional tractor is operating efficiency in terms of agricultural production is low, job costs are higher the problem of Just it is difficult to avoid that.The utility model, which outputs power, is changed to the form of three sections of conduction, wherein after output shaft leading portion and output shaft Section is shorter, and output shaft stage casing is longer so that before, during and after three sections of the concentricity of bearing position be guaranteed, each section of bearing position is same When enhance fixation and support to axle, the connection between each section of output shaft serves certain correction effect, fitted bearing So that concentricity can bear larger torque in rational scope all the time, integrally it is not easy to hold as traditional output shaft Bending deformation easy to break, also solve the problems, such as that traditional output shaft is long and rigidity is insufficient.

In addition, HST hydrostatic transmissions device described in the driving wheel walking mechanism and the HST power input shafts are set Put, that is, there are two kinds of means to go power being given to variable-speed shaft, can select to be passed by the HST hydrostatic transmissions device according to actual conditions Dynamic or described HST power input shafts transmission, HST can be avoided in Traditional control in running order for a long time and cause interior oil Temperature rise, influence the problem of oil, transmission stability difference.The limitation of the HST hydrostatic transmissions device in itself is gear shift Case has several forward ranges, just has several retrogressing gears, and in the routine work of agricultural machinery, seldom use and move back gear, therefore advance Gear and retrogressing gear possess identical quantity and just seem that some are unreasonable, cause that operation is unnecessary, complicated on the contrary, and increase HST use burden.By both the HST hydrostatic transmissions device and the HST power input shafts, in forward range and retrogressing Gear can each increase and decrease setting on demand on setting, and meet ongoing operations gear requirement, reduce less with gear and reversing demand gear Set, the adverse consequences for equally avoiding the HST hydrostatic transmissions device from working long hours and occur, while possess it is a variety of speed ratio before Enter gear, meet that a variety of agricultural operation gearbox speed compare demand.

Technological merit of the present utility model is that the power system architecture of the caterpillar tractor is compact, easy to use, The output shaft structural strength lifting, the concentricity of its bearing position are guaranteed, are hardly damaged, and transmission efficiency improves；Alleviate The live load of the HST hydrostatic transmissions device, can be according to actual conditions reasonable Arrangement gear；By described slow during braking in a turn Flushing device mitigates impact, realizes soft start, avoids impact injury；In terms of part disassembling, assembling and replacing have it is convenient, simple the advantages of, And maintenance difficulty and cost is greatly reduced.

Brief description of the drawings

Fig. 1 is the vertical view viewing angle constructions schematic diagram of the utility model embodiment；

Fig. 2 looks up viewing angle constructions schematic diagram for the utility model embodiment；

Each toponym corresponding to numbering is respectively in figure：1- clutches, 2- input shafts, 3- dynamic branch axles, 31- power Output driving gear, 32-HST power input driving gear, 4- output shafts, 41- power output driven gears, 42- output shafts are nibbled Trap, 43- output shaft leading portions, 44- output shafts stage casing, 45- output shaft back segments, 451- ends connecting shaft, 452- double cone rollers Bearing, 453- taper roll bearing seats, the spline housings of 46- first, the spline housings of 47- second, 5-HST power input shafts, 51-HST are moved Power inputs driven gear, 52- variable-speed dynamics input driving gear, 6- variable-speed shafts, 61- variable-speed dynamics input driven gear, 62- changes Fast power output driving gear, 63-HST power output driven gears, 64- the first variable-speed shaft engaging sleeves, the variable-speed shafts of 65- second are nibbled Trap, 7- counter shafts, 71- variable-speed dynamics output driven gear, 72- steering powers input driving gear, 8- steering spindles, 81- Steering power inputs driven gear, 82- retarding powers input driving gear, 9- deboost axles, 91- retarding powers input driven tooth Wheel, 92- driving powers input driving gear, 10- drive shafts, 101- driving powers input driven gear, 102- counter flanges, 20-HST hydrostatic transmissions devices.

Embodiment

Below in conjunction with accompanying drawing, by specific embodiment, the utility model is described in further detail：

See Fig. 1, Fig. 2, a kind of dynamical system of caterpillar tractor, including engine, clutch 1 and input shaft 2, clutch Device 1 uses the form of pull bar release yoke.The dynamical system also includes dynamic branch mechanism, power take-off mechanism and driving wheel walking Mechanism；Dynamic branch mechanism includes the dynamic branch axle 3 of connection input shaft 2, the power output on dynamic branch axle 3 actively Gear 31 and HST power input driving gear 32；Power output driving gear 31 is spur gear, and power output driving gear 31 is set 2 are equipped with, is divided into high speed gear and low gear, HST power input driving gear 32 is bevel gear；

Power take-off mechanism includes subsection setup and output shaft 4, the moving on output shaft 4 of adjacent two sections of drive connections Power exports driven gear 41 and the output shaft engaging sleeve 42 on output shaft 4 and between power output driven gear 41, Power output driven gear 41 engages connection with power output driving gear 31, and power output driven gear 41 is correspondingly arranged 2, The selection of output shaft engaging sleeve 42 links with one of power output driven gear 41 and realizes high speed gear or low gear and move Power transmission；

Driving wheel walking mechanism include be connected successively HST power input shafts 5, variable-speed shaft 6, counter shaft 7, turn to Axle 8, deboost axle 9 and drive shaft 10, HST power input shafts 5 and the common driving of variable-speed shaft 6 are connected with HST hydrostatic transmissions device 20, HST power input shafts 5 are connected with dynamic branch axle 3, are distinguished by HST hydrostatic transmissions device 20 with HST power input shafts 5 Realize the power transmission to variable-speed shaft 6.

HST power input shafts 5 are provided with HST power input driven gear 51 and variable-speed dynamic input driving gear 52, HST Power inputs driven gear 51 and engages connection with HST power input driving gear 32；HST power input driven gear 51 is corresponding to be set Bevel gear is set to, variable-speed dynamic input driving gear 52 is arranged to spur gear, realizes mechanical drive mode.

It is defeated that variable-speed shaft 6 is provided with variable-speed dynamic input driven gear 61, variable-speed dynamic output driving gear 62 and HST power Go out driven gear 63, the first variable-speed shaft is provided between variable-speed dynamic input driven gear 61 and HST power outputs driven gear 63 Engaging sleeve 64, variable-speed dynamic are provided with the second variable-speed shaft engaging sleeve 65, variable-speed dynamic input driven tooth between exporting driving gear 62 Wheel 61 engages connection with variable-speed dynamic input driving gear 52；Variable-speed dynamic input driven gear 61 is correspondingly arranged as spur gear； Variable-speed dynamic output driving gear 62 sets 2, is divided into high speed gear and low gear, and be arranged to spur gear；HST power is defeated Go out driven gear 63 and be arranged to spur gear；First variable-speed shaft engaging sleeve 64 selects to link with variable-speed dynamic input driven gear 61, Dynamic power machine can be achieved and drive to variable-speed shaft 6, the selection of the first variable-speed shaft engaging sleeve 64 and HST power outputs driven gear 63 It is dynamic, you can to realize that dynamicliquid pressure drives to variable-speed shaft 6；Second variable-speed shaft engaging sleeve 65 select the output of wherein 1 variable-speed dynamic from Moving gear 62 links and realizes high speed gear or low gear power transmission.

HST hydrostatic transmissions device 20 is provided with the power transmission shafts of HST first being connected with HST power input shafts 5 and moved with HST Power exports the HST second driving shafts of driving gear 31, HST power outputs driving gear 31 and HST power outputs driven gear 63 Engagement connection；HST power outputs driving gear 31 sets 1, can be set to spur gear, realize hydraulic transmission mode；

Counter shaft 7 is provided with variable-speed dynamic output driven gear 71 and steering power input driving gear 72, becomes quick-action Power exports driven gear 71 and engages connection with variable-speed dynamic output driving gear 62；Variable-speed dynamic output driven gear 71 is corresponding to be set 2 are put, spur gear can be set to, is divided into high speed gear and low gear；Steering power input driving gear 72 sets 1, can set For spur gear；

Steering spindle 8 is provided with steering power input driven gear 81 and retarding power input driving gear 82, steering power Input driven gear 81 engages connection with steering power input driving gear 72；Steering power input driven gear 81 sets 1, It is set to spur gear；Retarding power input driving gear 82 sets 2, is set to spur gear；Steering spindle 8, which is provided with, to be used to avoid turning to The buffer disc of return rigid shock, buffer disc include the first buffer disc, the second buffer disc, buffer spring and steering arm, and first is slow Punch plate transmits moment of torsion with the second buffer disc by being connected key connection, and the first buffer disc is arranged on the central transmission tooth of steering spindle 8 On, the second buffer disc is arranged on the steering tooth of steering spindle 8, and steering arm rotates the disengaging for realizing connecting key, and release is return, this When due to turning to tooth geo-stationary, run into the central tooth driving cog of high-speed rotation, buffer spring is located at the first buffer disc and second Now impacted between buffer disc so as to mitigate.

Deboost axle 9 is provided with retarding power input driven gear 91 and driving power input driving gear 92, retarding power Input driven gear 91 engages connection with retarding power input driving gear 82；Retarding power input driven gear 91 is correspondingly arranged 2, it is set to spur gear；Driving power input driving gear 92 sets 2, is set to spur gear；

Drive shaft 10 is provided with driving power input driven gear 101, and driving power input driven gear 101 and driving are dynamic The power input engagement connection of driving gear 92；Driving power input driven gear 101 is correspondingly arranged 2, is set to spur gear；Drive shaft 10 are provided with 2, correspond to left and right sidesing driving wheel respectively, and 2 drive shafts are not connected with, and driven gear is inputted each via driving power 101 drive.The end of drive shaft 10 is connected with counter flange 102, and driving wheel is directly mounted on counter flange 102, traditional Driving wheel itself is heavier, and spline die sinking directly can be opened just on the drive wheel, but driving wheel spline is bad right when mounted, mistake Crossing setting up for flange 102 is both easy to dismounting to repair, and can also substantially reduce maintenance cost.The above-mentioned gear for being set to spur gear form Helical gear can also be set to.

Output shaft 4 includes output shaft leading portion 43, output shaft stage casing 44 and output shaft back segment 45, output shaft leading portion 43 and output Axle stage casing 44 is connected by the first spline housing 46 passes through second and indirect connection, output shaft stage casing 44 with output shaft back segment 45 Spline housing 47 is connected and indirect connection.First spline housing 46 and/or the second spline housing 47 are provided with least two spline housings Bearing 48.First spline housing 46, the second spline housing 47 can play correction to the concentricity of spline housing bearing 48 and other bearing positions Effect, and reinforcement structure intensity, it is not easy to cause 4 whole sections of flexural deformations of output shaft, and spline housing bearing 48 is being strengthened fixed and propped up While supportting spline housing, also complemented each other with other bearings, ensure that concentricity maintains in the reasonable scope, to be less prone to partially all the time Difference, further protection is also functioned to axle.Output shaft back segment 45 is connected with end connecting shaft 451, the and of double cone roller bearing 452 Taper roll bearing seat 453, end connecting shaft 451, double cone roller bearing 452 and the integrally connected of taper roll bearing seat 453 And it can separate or install in the lump with output shaft back segment 45.Output shaft leading portion 43, the axial length of output shaft back segment 45 are respectively less than output shaft The axial length in stage casing 44, three sections of length ensure itself rigidity, safely and reliably play a part of transmitting moment of torsion, also eliminate tradition The drawbacks of output shaft.

Claims (7)

1. a kind of power take-off mechanism of caterpillar tractor, including engine, clutch（1）, input shaft（2）With driving wheel row Walk mechanism, it is characterised in that：Also include dynamic branch mechanism and power take-off mechanism；

The dynamic branch mechanism includes connecting the input shaft（2）Dynamic branch axle（3）, located at the dynamic branch axle （3）On power output driving gear（31）And HST power input driving gear（32）；

The power take-off mechanism includes being divided to three sections to set and the output shaft of adjacent two sections of drive connections（4）, located at the output Axle（4）On power output driven gear（41）With located at the output shaft（4）Go up and be located at the power output driven gear （41）Between output shaft engaging sleeve（42）, the power output driven gear（41）With the power output driving gear（31） Engagement connection.

A kind of 2. power take-off mechanism of caterpillar tractor according to claim 1, it is characterised in that：The output shaft （4）Including output shaft leading portion（43）, output shaft stage casing（44）With output shaft back segment（45）, the output shaft leading portion（43）With it is described Output shaft stage casing（44）Pass through the first spline housing（46）It is connected and indirect connection, the output shaft stage casing（44）With it is described defeated Shaft back segment（45）Pass through the second spline housing（47）It is connected and indirect connection.

A kind of 3. power take-off mechanism of caterpillar tractor according to claim 2, it is characterised in that：First flower Key set（46）And/or second spline housing（47）It is provided with least two spline housing bearings（48）.

A kind of 4. power take-off mechanism of caterpillar tractor according to claim 2, it is characterised in that：The output shaft Back segment（45）It is connected with end connecting shaft（451）, double cone roller bearing（452）With taper roll bearing seat（453）, the end Hold connecting shaft（451）, the double cone roller bearing（452）And the taper roll bearing seat（453）Integrally connected and can be with The output shaft back segment（45）Separate or install in the lump.

A kind of 5. power take-off mechanism of caterpillar tractor according to claim 2, it is characterised in that：The output shaft Leading portion（43）, the output shaft back segment（45）Axial length be respectively less than the output shaft stage casing（44）Axial length.

A kind of 6. power take-off mechanism of caterpillar tractor according to claim 1, it is characterised in that：The power is defeated Go out driving gear（31）, the power output driven gear（41）Each include high speed shift gear and low gear gear.

A kind of 7. power take-off mechanism of caterpillar tractor according to claim 1, it is characterised in that：The HST is moved Power inputs driving gear（32）For bevel gear.