CN206694537U - The multiple-speed gear-box of agricultural crawler body - Google Patents

Abstract

A kind of multiple-speed gear-box of agricultural crawler body, including casing, power input shaft is installed in casing, operation output shaft and planet wheel decelerator rear axle, power input shaft is connected with operation output shaft by operation shifter, power input shaft is connected by the more gear rotating speed change gears of twin shaft with planet wheel decelerator rear axle, the more gear rotating speed change gears of twin shaft include first rotating shaft and the second rotating shaft being mounted side by side in casing, more gear rotating switching mechanisms are provided between first rotating shaft and the second rotating shaft, first rotating shaft is located at one end of power input shaft and vertical with power input shaft, first rotating shaft is connected by the first transmission mechanism with power input shaft, second rotating shaft is connected by the second transmission mechanism with planet wheel decelerator rear axle.The multiple-speed gear-box has the advantages that simple and compact for structure, small volume, in light weight.

Description

The multiple-speed gear-box of agricultural crawler body

Technical field

It the utility model is related to transmission art field, and in particular to a kind of multiple-speed gear-box of agricultural crawler body.

Background technology

At present, the crawler tractor gearbox of in the market does not possess pivot stud function, caterpillar tractor speed change typically A wide range of adjustable travel speed is realized in the design of case generally use hydraulic pump motor and mechanical gear shift one, gear and axle be present Quantity it is more, system complex, the defects of cost is high, and gearbox is oversized, and fault rate is high, inconvenient for operation, and adaptability is not strong. Also, the crawler tractor gearbox back axle some of in the market does not possess pivot stud function, although some gearbox back axles have There is turning function, but its structure is numerous and diverse, installation accuracy is high, difficulty is big so that presence cost that gearbox is not avoided that is too high, The shortcomings of back axle bulk is excessive.In addition, the crawler tractor transfer case shift mechanisms of in the market typically use three or three Axle more than root, multiple drive shifts and reverse gear could be realized, the quantity of its gear and axle is more, directly results in speed change system and answers The miscellaneous, problem such as cost is high, overall dimension is big and reliability is low.

Utility model content

The technical problems to be solved in the utility model is to overcome the shortcomings of the prior art, there is provided a kind of simple in construction tight Gather, small volume, the multiple-speed gear-box of agricultural crawler body in light weight.

In order to solve the above technical problems, the utility model uses following technical scheme：

A kind of multiple-speed gear-box of agricultural crawler body, including casing, power input shaft, operation are installed in the casing Output shaft and planet wheel decelerator rear axle, the power input shaft are connected with operation output shaft by operation shifter, The power input shaft is connected by the more gear rotating speed change gears of twin shaft with planet wheel decelerator rear axle, the twin shaft More gear rotating speed change gears include being mounted side by side on first rotating shaft and the second rotating shaft in casing, the first rotating shaft and the It is provided with more gear rotating switching mechanisms between two rotating shafts, the first rotating shaft is located at one end of power input shaft and defeated with power It is vertical to enter axle, the first rotating shaft is connected by the first transmission mechanism with power input shaft, and second rotating shaft passes by second Motivation structure is connected with planet wheel decelerator rear axle.

Above-mentioned multiple-speed gear-box, it is preferred that more gear rotating switching mechanisms include a shelves gear, two grades of teeth Wheel, third gear, fourth gear, the first gear shift duplicate gear, the second gear shift duplicate gear, straight trip shelves bevel gear and reverse gear cone tooth Wheel, first transmission mechanism include the walking input bevel gear being connected with power input shaft, a shelves gear, two grades of teeth Wheel, third gear and fourth gear are fixedly mounted in the second rotating shaft, and the first gear shift duplicate gear is slidedly arranged on first rotating shaft Go up and one can be selected by slip and engage or do not engaged with a shelves gear and intermediate gear, institute with a shelves gear and intermediate gear State the second gear shift duplicate gear be slidedly arranged in first rotating shaft and can by slide select one engaged with third gear and fourth gear or Person is not engaged with third gear and fourth gear, and the straight trip shelves bevel gear is fixedly installed in first rotating shaft, the reverse gear Bevel gear is rotatably sheathed in first rotating shaft, and the straight trip shelves bevel gear and reverse gear bevel gear are divided into walking input cone tooth Wheel both sides and with walking input bevel gear engage, on the reverse gear bevel gear slide be provided with can by slide and one grade of tooth Wheel, intermediate gear, third gear and the engagement of fourth gear wherein at least one or out of mesh back gear, the multi gear Position rotating switching mechanism is also including the first straight trip shelves pull-fork assembly for driving the slip of the first gear shift duplicate gear, for driving Make the second straight trip shelves pull-fork assembly and the reverse speed fork group for driving back gear to slide that the second gear shift duplicate gear slides Part.

Above-mentioned multiple-speed gear-box, it is preferred that the walking input bevel gear is rotatably installed on power input shaft And be connected by a height quick change gear mechanism with power input shaft and be driven, the height quick change gear mechanism includes the first height Quick change shelves gear and high low speed duplicate gear, it is described walking input bevel gear be connected with synchronous axial system height quick change shelves gear ring and Second height quick change shelves gear, the high low speed duplicate gear are rotatably installed on an axle in casing, and described first Height quick change shelves gear is slidedly arranged on power input shaft and can select an one of tooth with high low speed duplicate gear by sliding Wheel and the engagement of height quick change shelves gear ring, another gear of the high low speed duplicate gear are nibbled with the second height quick change shelves gear Close, the height quick change gear mechanism also includes being used for the high low speed pull-fork assembly for driving the first height quick change shelves gear to be slided.

Above-mentioned multiple-speed gear-box, it is preferred that the operation shifter include operation selector shaft, operation triple gear, First operation duplicate gear, the second operation duplicate gear and operation fixed gear, the operation selector shaft are rotatably installed on It is arranged side by side on casing and with power input shaft, the operation output shaft is connected with operation selector shaft, the operation triple gear Rotatably it is installed on operation selector shaft, the operation fixed gear is fixedly arranged on operation selector shaft, and second operation is double Connection gear be rotatably installed on power input shaft, and two gears of the second operation duplicate gear respectively with the tooth of operation three One of gear and operation the fixed gear engagement of wheel, the first operation duplicate gear is slidedly arranged on power input shaft and energy By slide select one engaged with two other gear of operation triple gear or with any gear of operation triple gear not Engagement, the operation shifter also include being used for the operation pull-fork assembly for driving the first operation duplicate gear to slide.

Above-mentioned multiple-speed gear-box, it is preferred that the first straight trip shelves pull-fork assembly, the second straight trip shelves pull-fork assembly, fall Shelves pull-fork assembly, high low speed pull-fork assembly and operation pull-fork assembly include shift fork, selector shaft and slide actuator, and described first Straight trip shelves pull-fork assembly, the second straight trip shelves pull-fork assembly and reverse speed fork component set an independent selector shaft respectively, described High low speed pull-fork assembly and operation pull-fork assembly share a selector shaft；The first straight trip shelves pull-fork assembly, the second straight trip shelves In pull-fork assembly and reverse speed fork component, selector shaft is slidedly arranged on casing, and shift fork is fixed on selector shaft, and selector shaft drives with sliding Moving part is connected；In the high low speed pull-fork assembly and operation pull-fork assembly, selector shaft is fixedly installed on casing, and shift fork is slidedly arranged on It is connected on selector shaft and with sliding actuator.

Above-mentioned multiple-speed gear-box, it is preferred that the first straight trip shelves pull-fork assembly, the second straight trip shelves pull-fork assembly and fall Between the selector shaft and casing of shelves pull-fork assembly and the selector shaft of high low speed pull-fork assembly and operation pull-fork assembly and shift fork it Between be additionally provided with gear shift elastic positioning member；The first gear shift duplicate gear, the second gear shift duplicate gear, reverse gear bevel gear, One height quick change shelves gear and the first operation duplicate gear are equipped with neck, and the first gear shift duplicate gear, the second gear shift are double Connection gear, reverse gear bevel gear, the first height quick change shelves gear and shift fork corresponding to the first operation duplicate gear are provided with and are fastened in institute State the U-shaped card in neck.

Above-mentioned multiple-speed gear-box, it is preferred that the planet wheel decelerator rear axle includes rotatably being arranged on case Back axle main shaft on body and two groups of planetary gear output precisions for being separately mounted to back axle main shaft both ends, the back axle main shaft pass through institute State the second transmission mechanism with the second rotating shaft to be connected, the planetary gear output precision includes rotatably being installed on back axle main shaft Central gear, the planetary wheel carrier being fixedly mounted on back axle main shaft and the drive shaft that may be rotatably mounted on casing, the drive Moving axis is provided with output gear, and duplicate rows that is multiple while being engaged with central gear and output gear is provided with the planetary wheel carrier Star-wheel group, the dual planetary gear group include inner planets round, outer planet round and the rotatable planetary gear being installed on planetary wheel carrier The both ends of planet wheel spindle are fixedly mounted in axle, the inner planets round and outer planet round respectively, and the inner planets round is nibbled with central gear Close, the outer planet round engages with output gear, and the planet wheel decelerator rear axle also includes being used to control two groups of planets The course changing control mechanism taken turns the central gear rotating speed of output precision and turned to.

Above-mentioned multiple-speed gear-box, it is preferred that the course changing control mechanism includes turning to drive bevel gear and for driving The rotary drive of drive bevel gear is turned to, the central gear of each planetary gear output precision is connected with steering driven wheel of differential, The steering driven wheel of differential of two groups of planetary gear output precisions is divided into the both sides of steering drive bevel gear and with turning to initiative taper Gear engages.

Above-mentioned multiple-speed gear-box, it is preferred that corresponded on the casing each planetary gear output precision be mounted on be used for pair The brake apparatus that drive shaft is braked, the brake apparatus include the axle sleeve being fixedly arranged on casing, and the axle sleeve is sheathed on drive Outside moving axis, the stator group being made up of multi-disc braking stator is installed in the axle sleeve, multi-disc brakes stator along drive shaft axial direction Direction, which is slided, to be set, and arbitrary neighborhood two panels correspond in the drive shaft brakes stator and be mounted on a piece of being inserted in described adjacent two Braking moving plate between piece braking stator, the braking moving plate are slidedly arranged in drive shaft vertically, the system of described stator group one end Dynamic that brake pad is provided between stator and axle sleeve, the stator group other end is provided with braking briquetting, and the brake apparatus also includes being used for Driving braking briquetting coordinates the braking drive component for compressing or unclamping stator group with brake pad.

Above-mentioned multiple-speed gear-box, it is preferred that the braking drive component includes spragging gear, braking rack and driving system The reciprocating telescopic drive part of carry-over bar, the braking briquetting are axially slidedly arranged on axle sleeve along drive shaft, the spragging gear It is sheathed in drive shaft and can be slid axially relative to drive shaft turns and along drive shaft, the spragging gear and braking briquetting spiral shell Revolve chisel teeth to be connected, the braking rack is engaged with spragging gear, and prevention spragging gear is additionally provided with the axle sleeve to remote The stop member slided from the direction of stator group.

Compared with prior art, the utility model has the advantage of：The multi-change speed of the agricultural crawler body of the utility model The first rotating shaft of device power input shaft and the more gear rotating speed change gears of twin shaft uses orthogonal 90 ° of arranged crosswise shapes Formula, the structural compactness of multiple-speed gear-box can be greatly improved.Compared to congenerous gearbox, it has small volume, in light weight The advantages that.

Brief description of the drawings

Fig. 1 is the schematic diagram of the multiple-speed gear-box of agricultural crawler body.

Fig. 2 is the local main sectional view of the multiple-speed gear-box of agricultural crawler body.

Fig. 3 is the sectional view of bowing of the multiple-speed gear-box of agricultural crawler body.

Fig. 4 is the partial sectional view that each part is arranged on power input shaft.

Fig. 5 is the partial sectional view that each part is arranged on operation selector shaft.

Fig. 6 is the partial sectional view of the more gear rotating speed change gears of twin shaft.

Fig. 7 is that the first straight trip shelves pull-fork assembly, the second straight trip shelves pull-fork assembly and reverse speed fork component change with first respectively The partial sectional view that shelves duplicate gear, the second gear shift duplicate gear and back gear coordinate.

Fig. 8 is that the mounting structure of the first straight trip shelves pull-fork assembly, the second straight trip shelves pull-fork assembly and reverse speed fork component shows It is intended to.

Fig. 9 is the local main sectional view of high low speed pull-fork assembly and operation pull-fork assembly.

Figure 10 is the side partial cross-sectional of high low speed pull-fork assembly and operation pull-fork assembly.

Figure 11 is the partial sectional view of planet wheel decelerator rear axle.

Figure 12 is the partial sectional view that two groups of planetary gear output precisions are arranged on back axle main shaft both sides.

Figure 13 is the partial sectional view of brake apparatus.

Figure 14 is the schematic diagram of braking drive component.

Marginal data：

100th, casing；1st, power input shaft；2nd, operation output shaft；3rd, planet wheel decelerator rear axle；301st, back axle master Axle；302nd, central gear；303rd, planetary wheel carrier；304th, drive shaft；305th, output gear；306th, inner planets round；307th, outer planet Wheel；308th, planet wheel spindle；309th, drive bevel gear is turned to；310th, brake apparatus；3101st, axle sleeve；3102nd, stator is braked；3103、 Brake moving plate；3104th, brake pad；3105th, briquetting is braked；3106th, spragging gear；3107th, rack is braked；3109th, positioning lining Set；3110th, rolling bearing；3111st, interior snap ring；311st, rotary drive；312nd, driven wheel of differential is turned to；4th, operation gear shift machine Structure；400th, operation selector shaft；401st, operation triple gear；402nd, the first operation duplicate gear；403rd, the second operation duplicate gear； 404th, operation fixed gear；405th, operation pull-fork assembly；5th, the more gear rotating speed change gears of twin shaft；501st, first rotating shaft； 502nd, the second rotating shaft；503rd, a shelves gear；504th, intermediate gear；505th, third gear；506th, fourth gear；507th, the first gear shift Duplicate gear；508th, the second gear shift duplicate gear；509th, keep straight on shelves bevel gear；510th, reverse gear bevel gear；511st, walking input cone Gear；512nd, back gear；513rd, the first straight trip shelves pull-fork assembly；514th, the second straight trip shelves pull-fork assembly；515th, reverse speed fork Component；516th, the first height quick change shelves gear；517th, high low speed duplicate gear；518th, height quick change shelves gear ring；519th, second is high Low speed change gear；520th, high low speed pull-fork assembly；521st, shift fork；522nd, selector shaft；523rd, actuator is slided；601st, transmission master Moving gear；602nd, transfer driven gear.

Embodiment

The utility model is described in further detail below in conjunction with the drawings and specific embodiments.

As shown in Figures 1 to 5, the multiple-speed gear-box of the agricultural crawler body of the present embodiment, including casing 100, casing 100 In power input shaft 1, operation output shaft 2 and planet wheel decelerator rear axle 3 be installed, power input shaft 1 exports with operation Axle 2 is connected by operation shifter 4, and power input shaft 1 is slowed down by the more gear rotating speed change gears 5 of twin shaft and planetary gear Device rear axle 3 is connected, and the more gear rotating speed change gears 5 of twin shaft include the first rotating shaft 501 being mounted side by side in casing 100 With the second rotating shaft 502, more gear rotating switching mechanisms are provided between the rotating shaft 502 of first rotating shaft 501 and second, wherein, first Rotating shaft 501 is located at one end of power input shaft 1 and vertical with power input shaft 1, it is possible to increase structural compactness, first rotating shaft 501 are connected by the first transmission mechanism with power input shaft 1, and the second rotating shaft 502 is slowed down by the second transmission mechanism and planetary gear Device rear axle 3 is connected.Preferably, the medium position of the end face first rotating shaft 501 of power input shaft 1.

In the present embodiment, as shown in Fig. 1, Fig. 3, Fig. 6 and Fig. 7, more gear rotating switching mechanisms include a shelves gear 503rd, intermediate gear 504, third gear 505, fourth gear 506, the first gear shift duplicate gear 507, the second gear shift duplicate gear 508th, keep straight on shelves bevel gear 509, reverse gear bevel gear 510, and the first transmission mechanism includes the walking input being connected with power input shaft 1 Bevel gear 511, interval is fixed successively vertically for a shelves gear 503, intermediate gear 504, third gear 505 and fourth gear 506 In the second rotating shaft 502, the first gear shift duplicate gear 507 is slidedly arranged in first rotating shaft 501 vertically, the first gear shift duplex Gear 507 can by slide select one engaged with any one in a shelves gear 503 and intermediate gear 504 or with a shelves gear 503 and intermediate gear 504 do not engage, the second gear shift duplicate gear 508 is slidedly arranged in first rotating shaft 501 vertically, and second changes Shelves duplicate gear 508 can select one and engaged with any one in third gear 505 and fourth gear 506 or with three by sliding Shelves gear 505 and fourth gear 506 are not engaged, and straight trip shelves bevel gear 509 is fixedly installed in first rotating shaft 501, reverse gear cone Gear 510 is rotatably sheathed in first rotating shaft 501, and it is defeated that straight trip shelves bevel gear 509 and reverse gear bevel gear 510 are divided into walking Enter the both sides of bevel gear 511 and engaged with walking input bevel gear 511, slided on reverse gear bevel gear 510 and be provided with back gear 512, back gear 512 can be by slip and a shelves gear 503, intermediate gear 504, third gear 505 and fourth gear 506 At least one engagement or a shelves gear 503, intermediate gear 504, third gear 505 and fourth gear 506 it is out of mesh Back gear 512, more gear rotating switching mechanisms also first including being used to drive the first gear shift duplicate gear 507 to slide are straight Row shelves pull-fork assembly 513, for driving the second straight trip shelves pull-fork assembly 514 and be used for that the second gear shift duplicate gear 508 slides The reverse speed fork component 515 for driving back gear 512 to slide.The present embodiment by back gear 512 be arranged to by slide only with Intermediate gear 504 is engaged or not engaged, and by the power transmission of first rotating shaft 501 or is not passed by back gear 512 with realizing It is handed to the second rotating shaft 502, namely back gear 512 only has two states by sliding, first state is and intermediate gear 504 engagements, second state is not engaged with intermediate gear 504.In other embodiments, back gear 512 can also be set The one of cooperation of Cheng Yuyi shelves gears 503, third gear 505 and fourth gear 506 is driven or is not driven；Or with one Two or more in shelves gear 503, intermediate gear 504, third gear 505 and fourth gear 506 coordinates.

In the present embodiment, as shown in Figures 1 to 5, walking input bevel gear 511 is rotatably installed on power input shaft 1 It is connected above and with power input shaft 1 by a height quick change gear mechanism and is driven, height quick change gear mechanism includes the first height Quick change shelves gear 516 and high low speed duplicate gear 517, walking input bevel gear 511 are connected with the height quick change shelves of synchronous axial system The height quick change shelves gear 519 of gear ring 518 and second, high low speed duplicate gear 517 are rotatably installed on one in casing 100 On axle, the first height quick change shelves gear 516 is slidedly arranged on power input shaft 1, and the first height quick change shelves gear 516 can pass through slip Select one to engage with one of gear and height quick change shelves gear ring 518 of high low speed duplicate gear 517, high low speed duplicate gear 517 another gear often engages with the second height quick change shelves gear 519, and height quick change gear mechanism also includes being used to drive first The high low speed pull-fork assembly 520 that height quick change shelves gear 516 is slided；First height quick change shelves gear 516 and height quick change shelves tooth The gearratio of height quick change gear mechanism is not equal to the first height quick change shelves gear 516 and high low speed duplicate gear during the engagement of circle 518 The gearratio of height quick change gear mechanism during 517 engagement, so as to realize high low speed conversion, specifically, the first height quick change shelves gear The gearratio of 516 height quick change gear mechanisms when being engaged with height quick change shelves gear ring 518 be more than the first height quick change shelves gear 516 with The gearratio of height quick change gear mechanism when high low speed duplicate gear 517 engages.

The both ends of the rotating shaft 502 of first rotating shaft 501 and second of the present embodiment are arranged on casing 100 by bearing assembly respectively On, bearing assembly includes bearing and the end cap being fixedly mounted on casing 100, and the rotating shaft 502 of first rotating shaft 501 and second passes through axle Hold in end cap, and sealing ring is provided between the rotating shaft 502 of first rotating shaft 501 and second and end cap.First gear shift is double Connection gear 507, the second gear shift duplicate gear 508 are coordinated by spline and first rotating shaft 501, can be slided along first rotating shaft 501； Shelves bevel gear 510 is rotatably arranged in the second rotating shaft 502, and its axial both ends is respectively by located at the second rotating shaft 502 On semicircle back-up ring and the shaft shoulder it is spacing, back gear 512 by spline fitted be arranged on reverse gear bevel gear 510 on, can fall Slid axially on shelves bevel gear 510 along the second rotating shaft 502；Straight trip shelves bevel gear 509 is arranged on the second rotating shaft by spline fitted On 502, axial thrust load when it is with walking input bevel gear 511 and the shaft shoulder axially position in first rotating shaft 501. One shelves gear 503, intermediate gear 504, third gear 505 and fourth gear 506 are arranged on the second rotating shaft 502 by spline fitted On, and carried out between a shelves gear 503, intermediate gear 504, third gear 505 and fourth gear 506 using axial limit structure Axially position.

More gear rotating switching mechanisms can realize advance one grade, advance two grades, advance third gear, advance fourth gear, fall The conversion of shelves and six gears of neutral gear.When advancing one grade of gear, the first straight trip shelves pull-fork assembly 513 drives the first gear shift double Connection gear 507 slides into its gear wheel and engaged with a shelves gear 503, and the second straight trip shelves pull-fork assembly 514 drives the second gear shift double Connection gear 508 slides into not to be engaged with third gear 505 and fourth gear 506, and reverse speed fork component 515 drives back gear 512 do not engage with intermediate gear 504, after the power of power input shaft 1 is input to the input bevel gear 511 that walks, then pass through walking Input bevel gear 511 is transferred to straight trip shelves bevel gear 509 and reverse gear bevel gear 510, straight trip shelves bevel gear 509 and reverse gear bevel gear 510 are rotated by walking input bevel gear 511, both steering on the contrary, and reverse gear bevel gear 510 in first rotating shaft Dallied on 501, straight trip shelves bevel gear 509 is with 501 synchronous rotation of first rotating shaft, now, walking input bevel gear 511 Power is successively through shelves bevel gear 509, first rotating shaft 501, the gear wheel of the first gear shift duplicate gear 507 and the shelves gear of keeping straight on 503 are transferred to the second rotating shaft 502.Advance two grades is to change the cunning of the first gear shift duplicate gear 507 on the basis of one grade advancing Dynamic position, i.e., the first straight trip shelves pull-fork assembly 513 drive the first gear shift duplicate gear 507 to slide into its little gear and intermediate gear 504 engagements, the power of now walking input bevel gear 511 is successively through shelves bevel gear 509, first rotating shaft 501, the first gear shift of keeping straight on The little gear and intermediate gear 504 of duplicate gear 507 are transferred to the second rotating shaft 502.Advance third gear is on one grade of the basis of advancing The upper sliding position for changing the first gear shift duplicate gear 507 and the second gear shift duplicate gear 508, i.e., the first straight trip shelves pull-fork assembly 513 drive the first gear shift duplicate gear 507 to slide into does not engage with a shelves gear 503 and intermediate gear 504, while second is straight Row shelves pull-fork assembly 514 drives the second gear shift duplicate gear 508 to slide into its gear wheel and engaged with third gear 505, now goes Walk to input the power of bevel gear 511 successively through the shelves bevel gear 509 that keeps straight on, first rotating shaft 501, the second gear shift duplicate gear 508 Gear wheel and third gear 505 are transferred to the second rotating shaft 502.Advance fourth gear is to change the second gear shift on the basis of advance third gear The sliding position of duplicate gear 508, i.e., the second straight trip shelves pull-fork assembly 514 drive the second gear shift duplicate gear 508 to slide into it Little gear engages with fourth gear 506, and the power of now walking input bevel gear 511 is successively through the shelves bevel gear 509, first that keeps straight on Rotating shaft 501, the little gear of the second gear shift duplicate gear 508 and fourth gear 506 are transferred to the second rotating shaft 502.Neutral gear is preceding Enter on the basis of one grade to change the sliding position of the first gear shift duplicate gear 507, i.e., the first straight trip shelves pull-fork assembly 513 drives the One gear shift duplicate gear 507 slides into not to be engaged with a shelves gear 503 and intermediate gear 504, now walking input bevel gear 511 power, which is delivered to after first rotating shaft 501, is no longer transferred to the second rotating shaft 502.In the gear of reverse gear, the first straight trip shelves are dialled Fork component 513 drives the first gear shift duplicate gear 507 to slide into and not engaged with a shelves gear 503 and intermediate gear 504, and second Straight trip shelves pull-fork assembly 514 drives the second gear shift duplicate gear 508 to slide into third gear 505 and fourth gear 506 not Engagement, reverse speed fork component 515 drive back gear 512 to be engaged with intermediate gear 504, the power of walking input bevel gear 511 Successively the second rotating shaft 502 is transferred to through reverse gear bevel gear 510, back gear 512 and intermediate gear 504.

After above-mentioned more gear rotating switching mechanisms are combined with height quick change gear mechanism, 2 × 4 totally 8 can be further realized Drive shift, a high speed reverse, a low reverse gears and neutral gear, namely height quick change gear mechanism move under high-speed drive state Power can realize the different drive shift of four gearratios and a height through height quick change gear mechanism and more gear rotating switching mechanisms Fast reverse gear, height quick change gear mechanism under Low transmission state, through height quick change gear mechanism and more gear rotatings change by power Mechanism can realize the different drive shift of four additional gearratio and a low reverse gears.Using more gear rotating switching mechanisms with After the combination of height quick change gear mechanism, its gear is reasonable in design, easy to operate, can well adapt to each operating mode operation speed of agricultural machinery The requirement of degree.

The multiple-speed gear-box of the agricultural crawler body of the present embodiment, its power input shaft 1 and the more gear rotatings of twin shaft become The first rotating shaft 501 of speed variator 5 uses orthogonal 90 ° of arranged crosswise forms, can greatly improve the knot of multiple-speed gear-box Structure compactedness.In the more gear rotating speed change gears 5 of its twin shaft, straight trip shelves bevel gear 509 and reverse gear bevel gear 510 are using coaxial Design, the power transmission of drive shift and reverse gear is carried out respectively, reverse gear mechanism is greatly simplify, reduces the number of axle and gear Amount, improves structural compactness and reduces cost；Also, using 510 two cones of straight trip shelves bevel gear 509 and reverse gear bevel gear Walking of the gear with being connected power input shaft 1 inputs bevel gear 511 and engaged, and can preferably balance due to bevel gear engaged transmission Caused axial force, reduce the axial motion of first rotating shaft 501；Compared to existing logical function gear, the more gears of the twin shaft Rotating speed change gear 5 is with axle and gear quantity are few, simple and compact for structure, in light weight, velocity adaptive scope is wide, manufacturing cost The advantages that low, easy for installation, it can be widely applied in the transmission system of caterpillar tractor.

In the present embodiment, operation shifter 4 includes operation selector shaft 400, operation triple gear 401, the first operation pair Connection gear 402, the second operation duplicate gear 403 and operation fixed gear 404, operation selector shaft 400 are rotatably installed on case It is arranged side by side on body 100 and with power input shaft 1, operation output shaft 2 is connected with operation selector shaft 400 synchronizes rotation, makees Industry triple gear 401 is rotatably installed on operation selector shaft 400, and operation fixed gear 404 is fixedly arranged on operation selector shaft 400 On, the second operation duplicate gear 403 is rotatably installed on power input shaft 1, and two of the second operation duplicate gear 403 Gear often engages with the one of gear and operation fixed gear 404 of operation triple gear 401 respectively, the first operation duplex-gear Wheel 402 is slidedly arranged on power input shaft 1 vertically, and the first operation duplicate gear 402 can select one and the tooth of operation three by sliding Two other gear engagement of wheel 401 is not engaged, operation shifter 4 with any gear of operation triple gear 401 Also include being used for the operation pull-fork assembly 405 for driving the first operation duplicate gear 402 to slide.The operation gear shift of this kind of structure type Mechanism 4 can greatly improve structural compactness on the premise of load and gearratio requirement is met, make the overall dimensions of speed changer It is obviously reduced.And the shifter of a conventionally employed duplicate gear and two fixed gear fit forms, meeting that load will On the premise of asking, it is impossible to change the modulus and speed reducing ratio of gear, engine speed is exported to axle by primary speed-down, just must The diameter of axle gear must be increased, so can significantly increase the overall dimensions of gearbox.

The high low speed duplicate gear 517 of above-mentioned height quick change gear mechanism is rotatably installed on operation selector shaft 400, this Sample can reduce the quantity of axle, improve structural compactness, reduce cost.

One end of power input shaft 1 of the present embodiment is extend out to outside casing 100, and power input shaft 1 passes the position of casing 100 Put place and be provided with bearing assembly, the bearing assembly includes hubcap and bearing, and hubcap is bolted on casing 100, axle Hold installed between power input shaft 1 and hubcap, power input shaft 1 is rotated relative to casing 100, hubcap and power Lip-shaped sealed ring is additionally provided between input shaft 1, the other end of power input shaft 1 is arranged in casing 100 by bearing assembly.First The height quick change shelves gear 516 of operation duplicate gear 402 and first by spline empty set on power input shaft 1, can be along power Input shaft 1 slides.Second operation duplicate gear 403 by spline empty set on power input shaft 1, on power input shaft 1 Two operation duplicate gears, 403 axial both sides are respectively provided with axle snap ring and gear back-up ring, and axle is carried out to the second operation duplicate gear 403 To spacing.Height quick change shelves gear ring 518 and the second height quick change shelves gear 519 are integrated part, and the integral piece is free to rotate For empty set on power input shaft 1, integral piece one end is provided with jack, in the walking input partial insertion of bevel gear 511 jack and leads to Cross spline with integral piece to coordinate to realize synchronous axial system, thrust is provided between the integral piece other end and the shaft shoulder of power input shaft 1 The He of straight trip shelves bevel gear 509 of ball bearing back-up ring and thrust ball bearing, thrust ball bearing and more gear rotating switching mechanisms The axial thrust load collective effect of bevel gear 511 is inputted when reverse gear bevel gear 510 coordinates to walking to integral piece and walking input cone The axial limiting of gear 511.Operation selector shaft 400 is connected by spline housing with operation output shaft 2 and realizes synchronous axial system, wherein, make Industry selector shaft 400 is arranged on casing 100 by two sets of bearing assemblies, and a set of axle is provided between operation output shaft 2 and casing 100 Bearing assembly, each bearing assembly can use prior art, can include bearing (ball) cover and sealing ring etc..Operation triple gear 401 With 403 rotatable empty set of the second operation duplicate gear on operation selector shaft 400, operation fixed gear 404 by spline with Operation selector shaft 400 coordinates, and using back-up ring, bushing to operation triple gear 401, the second operation duplicate gear 403 and operation Fixed gear 404 carries out axially position, prevents from moving axially.

In the present embodiment, as shown in Figure 9 and Figure 10, high low speed pull-fork assembly 520 and operation pull-fork assembly 405 include dialling Fork 521 and the selector shaft 522 being fixedly installed on casing 100, shift fork 521 are slidedly arranged on selector shaft 522 and connect a slip and drive Moving part 523, prior art, such as the hand of telescopic cylinder, telescopic oil cylinder and existing speed changer can be used by sliding actuator 523 Move gear mechanism etc.；Preferably, high low speed pull-fork assembly 520 and operation pull-fork assembly 405 share a selector shaft 522, namely The shift fork 521 of high low speed pull-fork assembly 520 and operation pull-fork assembly 405 is slidedly arranged on a selector shaft 522, tight to improve structure Gathering property, reduce cost.Further, gear shift elastic positioning member is additionally provided between selector shaft 522 and shift fork 521, for each Shift fork 521 is positioned under range state；Specifically, gear shift elastic positioning member includes compressing steel ball and stage clip, stage clip and Compress steel ball to be installed on shift fork 521 and be open towards in the counterbore of selector shaft 522 successively, stage clip is pressed in steel ball is compressed On selector shaft 522, multiple positioning counterbores are correspondingly arranged on selector shaft 522, sliding control respective gears in shift fork 521 is in When under each range state, compress steel ball and just correspond in the one of positioning counterbore of press-in, so as to realize in the range state Under shift fork 521 is positioned, prevent shift fork 521 from arbitrarily moving.It is right on selector shaft 522 by taking high low speed pull-fork assembly 520 as an example Answer high low speed pull-fork assembly 520 to be provided with two positioning counterbores, when shift fork 521 be in make the first height quick change shelves gear 516 with During one of gear engagement of high low speed duplicate gear 517, compress steel ball and be just pressed into first positioning counterbore, work as shift fork 521, in when making the first height quick change shelves gear 516 be engaged with height quick change shelves gear ring 518, compress steel ball and are just pressed into second In individual positioning counterbore.Similarly, operation pull-fork assembly 405 is corresponded on selector shaft 522 and is provided with three positioning counterbores, when shift fork 521 Just pressed in steel ball when the first operation duplicate gear 402 is engaged with one of gear of operation triple gear 401, is compressed Enter in first positioning counterbore, make the another of the first operation duplicate gear 402 and operation triple gear 401 when shift fork 521 is in During individual gear engagement, compress steel ball and be just pressed into second positioning counterbore, make the first operation duplicate gear when shift fork 521 is in 402 with any gear of operation triple gear 401 when not engaging, compresses steel ball and is just pressed into the 3rd positioning counterbore.

Preferably, the first height quick change shelves gear 516 and the first operation duplicate gear 402 are equipped with neck, the first height Shift fork 521 corresponding to quick change shelves gear 516, which is provided with, is fastened in U-shaped card in the neck of the first height quick change shelves gear 516, and first makees Shift fork 521 corresponding to industry duplicate gear 402 is provided with the U-shaped card being fastened in the neck of the first operation duplicate gear 402, shift fork 521 can accordingly stir the first height quick change shelves gear 516 and the edge of the first operation duplicate gear 402 when being slided along selector shaft 522 Power input shaft 1 slides.This kind of shift fork 521, which is connected the structure type coordinated with respective gears, has simple in construction, making assembling Easily, the advantages of stable and reliable in work.

To provide power needed for operation, the operation output shaft 2 of the present embodiment is the above-mentioned connection operation equipment of operation output shaft 2 Used as rotary tillage shaft.When operation pull-fork assembly 405 drives the little gear and operation triple gear of the first operation duplicate gear 402 During 401 engagement, little gear successively through the first operation duplicate gear 402 of the power of power input shaft 1, operation triple gear 401, Second operation duplicate gear 403 and operation fixed gear 404 are transferred to operation selector shaft 400, and operation selector shaft 400 is with operation Output shaft 2 rotates, and is now low speed operation shelves；When operation pull-fork assembly 405 drives the gear wheel of the first operation duplicate gear 402 When being engaged with operation triple gear 401, gear wheel successively through the first operation duplicate gear 402 of the power of power input shaft 1, make Industry triple gear 401, the second operation duplicate gear 403 and operation fixed gear 404 are transferred to operation selector shaft 400, and operation is changed Shelves axle 400 rotates output operation power with operation output shaft 2, is now high-speed job shelves；When operation pull-fork assembly 405 drives When two gears of the first operation duplicate gear 402 do not engage with operation triple gear 401, the power of power input shaft 1 is not Operation selector shaft 400 is transferred to, operation selector shaft 400 does not rotate with operation output shaft 2, is now neutral gear.

In the present embodiment, as shown in Figure 7 and Figure 8, the first straight trip shelves shift fork group of the more gear rotating speed change gears 5 of twin shaft The straight trip shelves of part 513, second pull-fork assembly 514 and reverse speed fork component 515 include shift fork 521 and are slidedly arranged on casing 100 Selector shaft 522, shift fork 521 are fixed on selector shaft 522, and selector shaft 522 is connected with a slip actuator 523, slides actuator 523 can use prior art, such as manual shifting mechanism of telescopic cylinder, telescopic oil cylinder and existing speed changer etc..It is preferred that , first the 513, second straight trip shelves of straight trip shelves pull-fork assembly pull-fork assembly 514 and reverse speed fork component 515 set one solely respectively Vertical selector shaft 522, namely first the 513, second straight trip shelves of straight trip shelves pull-fork assembly pull-fork assembly 514 and reverse speed fork component 515 include independent shift fork 521 and selector shaft 522.In other embodiments, the first straight trip shelves pull-fork assembly 513, second is straight Row shelves pull-fork assembly 514, reverse speed fork component 515, high low speed pull-fork assembly 520 and operation pull-fork assembly 405 can also use upper State the structure type of high low speed pull-fork assembly 520 and operation pull-fork assembly 405, or the shift fork group using existing other forms Part.

Further, selector shaft 522 is slidably installed in the slide being fixed on casing 100, between selector shaft 522 and slide also Provided with gear shift elastic positioning member, for being positioned under each range state to shift fork 521；Specifically, gear shift is flexibly positioned Component includes compressing steel ball and stage clip, and slide is provided with counterbore of the opening towards selector shaft 522, and stage clip and compression steel ball fill successively It is located in the counterbore and stage clip makes compression steel ball be close to selector shaft 522, selector shaft 522 is provided with multiple for being pressed into compression steel The positioning counterbore of pearl.When shift fork 521 slides control respective gears and is under each range state, compress steel ball and just correspond to pressure Enter in one of positioning counterbore, shift fork 521 is positioned under the range state so as to realize, prevents that shift fork 521 is random It is mobile.By taking the first straight trip shelves pull-fork assembly 513 as an example, corresponding first straight trip shelves pull-fork assembly 513 is provided with three on selector shaft 522 Individual positioning counterbore, when shift fork 521, which is in, the first gear shift duplicate gear 507 is engaged with a shelves gear 503, compress steel ball just It is pressed into first positioning counterbore, when shift fork 521, which is in, the first gear shift duplicate gear 507 is engaged with intermediate gear 504, pressure Tight steel ball is just pressed into second positioning counterbore, makes the first gear shift duplicate gear 507 and a shelves gear when shift fork 521 is in 503 and intermediate gear 504 when not engaging, compress steel ball and be just pressed into the 3rd positioning counterbore.

It is similar with high low speed pull-fork assembly 520 and operation pull-fork assembly 405 in the present embodiment, the first gear shift duplicate gear 507th, the second gear shift duplicate gear 508 and back gear 512 are equipped with neck, shift fork corresponding to the first gear shift duplicate gear 507 521 be provided be fastened in U-shaped card in the neck of the first gear shift duplicate gear 507, shift fork corresponding to the second gear shift duplicate gear 508 521 are provided with the U-shaped card being fastened in the neck of the second gear shift duplicate gear 508, and shift fork 521 is provided with corresponding to back gear 512 The U-shaped card being fastened in the neck of back gear 512, shift fork 521 can accordingly stir the first gear shift when being slided along selector shaft 522 Duplicate gear 507, the second gear shift duplicate gear 508 and back gear 512 slide along first rotating shaft 501.This kind of shift fork 521 and phase The structure type for answering gear connection to coordinate has the advantages of simple in construction, making assembling is easy, stable and reliable in work.

In the present embodiment, as shown in Fig. 1, Fig. 3, Figure 11 and Figure 12, planet wheel decelerator rear axle 3 includes rotatable Back axle main shaft 301 on casing 100 and two groups of planetary gear output precisions for being separately mounted to the both ends of back axle main shaft 301, Back axle main shaft 301 is connected by the second transmission mechanism with the second rotating shaft 502 of the more gear rotating speed change gears 5 of twin shaft, each row Star-wheel output precision include rotatably be installed on back axle main shaft 301 central gear 302, be fixedly mounted on back axle main shaft Planetary wheel carrier 303 on 301 and the drive shaft 304 that may be rotatably mounted on casing 100, drive shaft 304 are provided with output gear 305 are taken turns, dual planetary gear group that is multiple while being engaged with central gear 302 and output gear 305 is installed on planetary wheel carrier 303, Dual planetary gear group includes inner planets round 306, outer planet round 307 and the rotatable planet wheel spindle being installed on planetary wheel carrier 303 308, the both ends of planet wheel spindle 308, inner planets round 306 and centre tooth is fixedly mounted in inner planets round 306 and outer planet round 307 respectively The engagement of wheel 302, outer planet round 307 engage with output gear 305, and planet wheel decelerator rear axle 3 also includes being used to control two The rotating speed of central gear 302 of group planetary gear output precision and the course changing control mechanism turned to.

In the present embodiment, course changing control mechanism includes turning to drive bevel gear 309 and turns to drive bevel gear for driving 309 rotary drive 311, the central gear 302 of each planetary gear output precision, which is connected with, turns to driven wheel of differential 312, and two The steering driven wheel of differential 312 that the central gear 302 of group planetary gear output precision is affixed is divided into steering drive bevel gear 309 Both sides and with turn to drive bevel gear 309 engage.The rotary drive 311 of the present embodiment specifically uses hydraulic motor, can be with Realize electrodeless variable-speed, hydraulic motor is mounted by means of bolts on casing 100, turn to drive bevel gear 309 by spline with Hydraulic motor connects, and turns to axial thrust load when drive bevel gear 309 coordinates by turning to driven wheel of differential 312 and hydraulic pressure horse Up to axially position.

In the present embodiment, the second transmission mechanism includes the He of transmission gear 601 being fixedly mounted in the second rotating shaft 502 The transfer driven gear 602 being fixedly mounted on back axle main shaft 301, transmission gear 601 are nibbled with transfer driven gear 602 Close, the power of the second rotating shaft 502 is transferred to back axle main shaft 301.Transmission gear 601 is arranged on the by spline fitted In two rotating shafts 502, a shelves gear 503, intermediate gear 504, third gear 505, fourth gear 506 and transmission gear 601 Axially position is carried out by bushing and bearing in the second rotating shaft 502.After transfer driven gear 602 is arranged on by spline fitted On bridge main shaft 301, pass through the bearing on back axle main shaft 301 and back-up ring axially position.

The 302 rotatable empty set of central gear of the present embodiment is arranged on back axle main shaft 301, and by located at back axle master The shaft shoulder and axle snap ring axially position on axle 301；Planetary wheel carrier 303 is arranged on back axle main shaft 301 by spline fitted, and Pass through the shaft shoulder on back axle main shaft 301 and axle snap ring axially position；Planet wheel spindle 308 is expert at by two bearing installations On star wheel frame 303, can freely it rotate, inner planets round 306 and outer planet round 307 are arranged on planetary gear by spline fitted respectively On axle 308, and pass through the shaft shoulder on planet wheel spindle 308 and axle snap ring axially position respectively.

In the present embodiment, each planetary gear output precision is corresponded on casing 100 and is mounted on being used to make drive shaft 304 Dynamic brake apparatus 310.

The planet wheel decelerator rear axle 3 can need to realize cast, one side brake and hydraulic motor according to different Three kinds of steering forms of assisted diversion, its flexibility are high, adaptable.When cast turns to, the control more gears of twin shaft are positive and negative Power is not transferred to back axle main shaft 301 by transformation speed variator 5, and back axle main shaft 301 does not rotate, and is directly provided by course changing control mechanism Electronic-controlled power steering, the now drive of rotary drive 311 turn to drive bevel gear 309 and rotated, and make turn of two groups of planetary gear output precisions Rotated backward to driven wheel of differential 312 is relative, so it is also relatively reverse with the central gear 302 of two groups of planetary gear output precisions Rotate, the central gear 302 of two groups of planetary gear output precisions drives corresponding dual planetary gear group to rotate, two groups of planetary gear output groups The dual planetary gear group of part drives two drive shafts 304 to rotate again, and final two rotation directions of drive shaft 304 are on the contrary, and rotating speed phase It is equal Deng, torque, realize cast.

One side brake turn to when, radius of turn depend on crawler body crawler belt width, power input shaft 1 power and The power of course changing control mechanism is driven under the lower or driving of single power jointly, one side brake can be used to turn to.With list Exemplified by side braking is turned right, brake apparatus 310 is braked to the right drive shaft 304, and the more gear rotating speed change gears 5 of twin shaft will Power is transferred to back axle main shaft 301, and back axle main shaft 301 drives the planetary wheel carrier 303 of two groups of planetary gear output precisions to rotate, planet Wheel carrier 303 revolves round the sun around central gear 302, while the dual planetary gear group revolution on planetary wheel carrier 303 and autobiography, because the right drives Axle 304 does not rotate under on-position, and output gear 305 does not also rotate, and power is through the right dual planetary gear group, the right central gear 302nd, the right turns to driven wheel of differential 312, turns to drive bevel gear 309, left side steering driven wheel of differential 312, left side centre tooth Wheel 302, left side dual planetary gear group are transferred to left side drive shaft 304, left side drive shaft 304 is rotated with double power, so as to real Existing right turn.Namely during one side brake steering, the drive shaft 304 of brake side is braked without rotating, and the power of brake side is through row Star-wheel output precision and steering drive bevel gear 309 are transferred to non-brake side.If the auxiliary of rotary drive 311 is turned right, that is, increase The moment of torsion of steering drive bevel gear 309, its kind of drive are constant when adding steering.

During hydraulic motor assisted diversion, radius of turn depends on travel speed and the collective effect of hydraulic motor rotary speed, is Radius of turn maximum in three kinds of steering forms.Two groups of planetary gear output groups are driven in the more gear rotating speed change gears 5 of twin shaft While 303 constant velocity rotation in the same direction of planetary wheel carrier of part, rotary drive 311 drives the centre tooth of two groups of planetary gear output precisions 302 reverse constant velocity rotations are taken turns, now the rotating speed of the dual planetary gear group of two groups of planetary gear output precisions is unequal, drives both sides to drive The rotating speed of axle 304 is also unequal, is turned to so as to realize.

The planet wheel decelerator rear axle 3 of the present embodiment is using the WW type planetary gears in 2K-H types, compared to existing change The quantity of gear and axle used in fast device is less, avoids using large-scale parts such as external toothings and causes that assembly difficulty is big, takes The problems such as space is big, weight is high, it can be arranged with small space and realize big speed ratio, and multi point engagement also increases gear transmission The ability and reliability of moment of torsion.It sets the rotating speed of central gear 302 of course changing control two groups of planetary gear output precisions of mechanism controls And steering, planet wheel decelerator rear axle 3 is integrated functional diversities, not only with common differential function, and utilize Course changing control mechanism is aided in, and a variety of steering forms such as straight-line travelling, pivot stud, differential steering can be achieved, and it turns to spirit Activity is high, adaptable, has more preferable adaptability for the complex environment of agricultural mechanical operation.Brake apparatus 310 is being set Drive shaft 304 can also be braked respectively afterwards, available for coordinating one side brake to turn to, can be used for stopping brake.With it is same Function gearbox back axle is compared, the planet wheel decelerator rear axle 3 have structure is simplified, matching requirements are low, bulk is small, The advantages that moment of torsion is big is transmitted, can be widely applied in transmission system.

In the present embodiment, as shown in Figure 13 and Figure 14, brake apparatus 310 includes the axle sleeve 3101 being fixedly arranged on casing 100, Axle sleeve 3101 is sheathed on outside drive shaft 304, and the stator group being made up of multi-disc braking stator 3102 is provided with axle sleeve 3101, more Piece brakes stator 3102 and slides setting along the axial direction of drive shaft 304, and arbitrary neighborhood two panels braking stator is corresponded in drive shaft 304 3102 are mounted on a piece of braking moving plate 3103 being inserted between the adjacent two panels braking stator 3102, braking moving plate 3103 edge Axially it is slidedly arranged in drive shaft 304, is provided between the braking stator 3102 and axle sleeve 3101 of stator group one end and stator group is carried out Brake pad 3104 used in axial limiting and maintenance compensation, the stator group other end are provided with braking briquetting 3105, brake apparatus 310 Also include being used to drive braking briquetting 3105 to coordinate the braking drive component for compressing or unclamping stator group with brake pad 3104.

In the present embodiment, braking drive component includes spragging gear 3106, braking rack 3107 and driving braking rack 3107 reciprocating telescopic drive parts（Not shown in figure）, brake briquetting 3105 and be axially slidedly arranged on axle sleeve along drive shaft 304 On 3101, spragging gear 3106 be sheathed in drive shaft 304 and can be rotated relative to drive shaft 304 and along drive shaft 304 axially Slide, spragging gear 3106 is connected with braking briquetting 3105 helical chisel teeth, braking rack 3107 and spragging gear 3106 Engage, the stop member for preventing spragging gear 3106 from being slided to the direction away from stator group is additionally provided with axle sleeve 3101.

Above-mentioned multi-disc braking stator 3102, which is slidably installed in axle sleeve 3101, is specifically, and each stator 3102 of braking rotatably is arranged In in drive shaft 304, braking stator 3102 outer is provided with external splines, and the internal spline that the inwall of axle sleeve 3101 is provided with, each braking is calmly The internal spline of the external splines of piece 3102 and axle sleeve 3101 is beneficial to ensure along the axial sliding fit of drive shaft 304, this kind of structure and mode Brake the stability that stator 3102 slides.Braking briquetting 3105 is axially slidedly arranged in axle sleeve 3101 along drive shaft 304, system Dynamic pressure block 3105 is sheathed in drive shaft 304 and can rotate relative to drive shaft 304 and be slided along drive shaft 304, is pressed in braking The outer of block 3105 is provided with external splines, brakes the external splines of briquetting 3105 and the internal spline of axle sleeve 3101 along the axial direction of drive shaft 304 It is slidably matched, this kind of structure and mode are beneficial to improve structural compactness and reduce cost, and convenient processing and assembling.It is above-mentioned more It is specifically that drive shaft 304 is provided with external splines, respectively brakes moving plate that piece braking moving plate 3103 is slidedly arranged in drive shaft 304 vertically 3103 are provided with to be sheathed on the external splines of drive shaft 304 and slide axially along drive shaft 304 with the external splines of drive shaft 304 and match somebody with somebody Conjunction, braking moving plate 3103 rotate with drive shaft 304, and this kind of structure and mode are beneficial to ensure the steady of the braking slip of moving plate 3103 It is qualitative.Above-mentioned stop member includes positioning bushing 3109, interior snap ring 3111 and between drive shaft 304 and axle sleeve 3101 Rolling bearing 3110, positioning bushing 3109 positioned at spragging gear 3106 and rolling bearing 3110 between, and spragging gear 3106, calmly Position bushing 3109 and rolling bearing 3110 are close to successively, and interior snap ring 3111 is arranged in axle sleeve 3101 and is located at rolling bearing 3110 Side away from spragging gear 3106, prevent rolling bearing 3110 from along drive shaft 304 axially to away from spragging gear 3106 Direction is moved, and this kind of structure and mode beneficial to raising structural compactness and reduce cost, and conveniently process and assemble.Above-mentioned system Moving gear 3106 is connected particular by the spiral on spragging gear 3106 with braking briquetting 3105 helical chisel teeth Chisel teeth is coordinated with the reverse acting spiral chisel teeth on braking briquetting 3105.Above-mentioned telescopic drive part can use existing Combination of telescopic cylinder, telescopic oil cylinder and motor and hydraulic motor and rotational alignment switching mechanism in technology etc..

During telescopic drive part driving braking 3107 linear reciprocating motion of rack, braking rack 3107 accordingly drives spragging gear 3106 positive and negative rotations, when spragging gear 3106 rotates forward, braking briquetting 3105 is not rotated, and spragging gear 3106 is pressed with braking Helical chisel teeth between block 3105 staggers, and gap increases between spragging gear 3106 and braking briquetting 3105, and because braking Gear 3106 leans against positioning bushing 3109, rolling bearing 3110 and interior snap ring 3111, interior snap ring 3111 and is stuck in axle sleeve 3101, makes Moving gear 3106 can not move along the inside direction of snap ring 3111 of the axle of drive shaft 304, so promoting braking briquetting 3105 to stator group It is mobile, so as to compress the braking stator 3102 in axle sleeve 3101 and brake the gap of moving plate 3103, brake the multi-disc of stator group Stator 3102 it is close to each other compress braking moving plate 3103, using brake stator 3102 and braking moving plate 3103 between be bonded to each other when Frictional force realize braking；When braking rack 3107 drives spragging gear 3106 to rotate backward, spragging gear 3106 and braking Chisel teeth dislocation between briquetting 3105 reduces, and gap reduces between spragging gear 3106 and braking briquetting 3105, brakes briquetting 3105 no longer compress braking stator 3102 and braking moving plate 3103 in axle sleeve 3101, do not produce braking action.

The present embodiment brake apparatus 310 is staggered to brake stator 3102 and brake moving plate 3103 using multi-disc to be coordinated to driving Moving axis 304 is braked, and can substantially increase brake force, improves braking ability and reliability, and is braked stator 3102, braked and move Piece 3103, the braking brake component such as briquetting 3105 and brake pad 3104 are installed in axle sleeve 3101, will not be by outside ash Dirt or the foreign object of splashing are influenceed, and foreign object can be avoided to enter and influence braking, extend service life.The brake apparatus 310 has Have the advantages that it is compact-sized, occupy little space, make assembly difficulty and require low, easily controllable.

Described above is only preferred embodiment of the present utility model, and the scope of protection of the utility model is not limited merely to Above-described embodiment.To those of ordinary skill in the art, the gained under the premise of the utility model technical concept is not departed from To modifications and variations also should be regarded as the scope of protection of the utility model.

Claims (10)

1. a kind of multiple-speed gear-box of agricultural crawler body, including casing（100）, the casing（100）Middle installation is dynamic defeated Enter axle（1）, operation output shaft（2）With planet wheel decelerator rear axle（3）, the power input shaft（1）With operation output shaft （2）Pass through operation shifter（4）It is connected, it is characterised in that：The power input shaft（1）Become by the more gear rotatings of twin shaft Speed variator（5）With planet wheel decelerator rear axle（3）It is connected, the more gear rotating speed change gears of twin shaft（5）Including simultaneously Row is arranged on casing（100）In first rotating shaft（501）With the second rotating shaft（502）, the first rotating shaft（501）With the second rotating shaft （502）Between be provided with more gear rotating switching mechanisms, the first rotating shaft（501）Positioned at power input shaft（1）One end and With power input shaft（1）Vertically, the first rotating shaft（501）Pass through the first transmission mechanism and power input shaft（1）It is connected, it is described Second rotating shaft（502）Pass through the second transmission mechanism and planet wheel decelerator rear axle（3）It is connected.

2. the multiple-speed gear-box of agricultural crawler body according to claim 1, it is characterised in that：More gear rotatings Switching mechanism includes a shelves gear（503）, intermediate gear（504）, third gear（505）, fourth gear（506）, the first gear shift Duplicate gear（507）, the second gear shift duplicate gear（508）, straight trip shelves bevel gear（509）With reverse gear bevel gear（510）, described One transmission mechanism includes and power input shaft（1）Connected walking input bevel gear（511）, a shelves gear（503）, two grades Gear（504）, third gear（505）And fourth gear（506）It is fixedly mounted on the second rotating shaft（502）On, first gear shift Duplicate gear（507）It is slidedly arranged on first rotating shaft（501）Above and one and one shelves gear can be selected by sliding（503）And intermediate gear （504）Engagement or with a shelves gear（503）And intermediate gear（504）Do not engage, the second gear shift duplicate gear（508） It is slidedly arranged on first rotating shaft（501）Above and one and third gear can be selected by sliding（505）And fourth gear（506）Engagement or with Third gear（505）And fourth gear（506）Do not engage, the straight trip shelves bevel gear（509）It is fixedly installed in first rotating shaft （501）On, the reverse gear bevel gear（510）Rotatably it is sheathed on first rotating shaft（501）On, the straight trip shelves bevel gear （509）With reverse gear bevel gear（510）It is divided into walking input bevel gear（511）Both sides and with walking input bevel gear（511） Engagement, the reverse gear bevel gear（510）Upper slip is provided with can be by sliding and a shelves gear（503）, intermediate gear（504）、 Third gear（505）And fourth gear（506）Wherein at least one engages or out of mesh back gear（512）, it is described More gear rotating switching mechanisms also include being used to drive the first gear shift duplicate gear（507）The the first straight trip shelves shift fork group slided Part（513）, for driving the second gear shift duplicate gear（508）The the second straight trip shelves pull-fork assembly slided（514）With for driving Back gear（512）The reverse speed fork component of slip（515）.

3. the multiple-speed gear-box of agricultural crawler body according to claim 2, it is characterised in that：The walking input cone tooth Wheel（511）Rotatably it is installed on power input shaft（1）Go up and pass through a height quick change gear mechanism and power input shaft（1）It is connected It is driven, the height quick change gear mechanism includes the first height quick change shelves gear（516）With high low speed duplicate gear（517）, The walking input bevel gear（511）It is connected with the height quick change shelves gear ring of synchronous axial system（518）With the second height quick change shelves tooth Wheel（519）, the high low speed duplicate gear（517）Rotatably it is installed on casing（100）In an axle on, described first is high Low speed change gear（516）It is slidedly arranged on power input shaft（1）Above and one and high low speed duplicate gear can be selected by sliding（517）'s One of gear and height quick change shelves gear ring（518）Engagement, the high low speed duplicate gear（517）Another gear and Two height quick change shelves gears（519）Engagement, the height quick change gear mechanism also include being used to drive the first height quick change shelves gear （516）The high low speed pull-fork assembly slided（520）.

4. the multiple-speed gear-box of agricultural crawler body according to claim 3, it is characterised in that：The operation shifter （4）Including operation selector shaft（400）, operation triple gear（401）, the first operation duplicate gear（402）, the second operation duplex-gear Wheel（403）With operation fixed gear（404）, the operation selector shaft（400）Rotatably it is installed on casing（100）Above and with moving Power input shaft（1）It is arranged side by side, the operation output shaft（2）With operation selector shaft（400）It is connected, the operation triple gear （401）Rotatably it is installed on operation selector shaft（400）On, the operation fixed gear（404）It is fixedly arranged on operation selector shaft （400）On, the second operation duplicate gear（403）Rotatably it is installed on power input shaft（1）On, and the second operation duplex Gear（403）Two gears respectively with operation triple gear（401）One of gear and operation fixed gear（404）Nibble Close, the first operation duplicate gear（402）It is slidedly arranged on power input shaft（1）Above and one and the tooth of operation three can be selected by sliding Wheel（401）Two other gear engagement or with operation triple gear（401）Any gear do not engage, the operation is changed Gear mechanism（4）Also include being used to drive the first operation duplicate gear（402）The operation pull-fork assembly of slip（405）.

5. the multiple-speed gear-box of agricultural crawler body according to claim 4, it is characterised in that：The first straight trip shelves are dialled Pitch component（513）, second straight trip shelves pull-fork assembly（514）, reverse speed fork component（515）, high low speed pull-fork assembly（520）And work Industry pull-fork assembly（405）Include shift fork（521）, selector shaft（522）With slip actuator（523）, the first straight trip shelves group Pitch component（513）, second straight trip shelves pull-fork assembly（514）With reverse speed fork component（515）A piece independent gear shift is set respectively Axle（522）, the high low speed pull-fork assembly（520）With operation pull-fork assembly（405）Share a selector shaft（522）；Described One straight trip shelves pull-fork assembly（513）, second straight trip shelves pull-fork assembly（514）With reverse speed fork component（515）In, selector shaft （522）It is slidedly arranged on casing（100）On, shift fork（521）It is fixed in selector shaft（522）On, selector shaft（522）With sliding actuator （523）It is connected；The high low speed pull-fork assembly（520）With operation pull-fork assembly（405）In, selector shaft（522）It is fixedly installed in Casing（100）On, shift fork（521）It is slidedly arranged on selector shaft（522）Above and with sliding actuator（523）It is connected.

6. the multiple-speed gear-box of agricultural crawler body according to claim 5, it is characterised in that：The first straight trip shelves are dialled Pitch component（513）, second straight trip shelves pull-fork assembly（514）With reverse speed fork component（515）Selector shaft（522）With casing （100）Between and high low speed pull-fork assembly（520）With operation pull-fork assembly（405）Selector shaft（522）With shift fork（521） Between be additionally provided with gear shift elastic positioning member；The first gear shift duplicate gear（507）, the second gear shift duplicate gear（508）, fall Shelves bevel gear（510）, the first height quick change shelves gear（516）With the first operation duplicate gear（402）It is equipped with neck, described One gear shift duplicate gear（507）, the second gear shift duplicate gear（508）, reverse gear bevel gear（510）, the first height quick change shelves gear （516）With the first operation duplicate gear（402）Corresponding shift fork（521）Provided with the U-shaped card being fastened in the neck.

7. the multiple-speed gear-box of agricultural crawler body according to any one of claim 1 to 6, it is characterised in that：It is described Planet wheel decelerator rear axle（3）Including being rotatably arranged on casing（100）On back axle main shaft（301）Install respectively In back axle main shaft（301）Two groups of planetary gear output precisions at both ends, the back axle main shaft（301）Pass through second transmission mechanism With the second rotating shaft（502）It is connected, the planetary gear output precision includes rotatably being installed on back axle main shaft（301）On center Gear（302）, be fixedly mounted on back axle main shaft（301）On planetary wheel carrier（303）And it may be rotatably mounted at casing（100）On Drive shaft（304）, the drive shaft（304）It is provided with output gear（305）, the planetary wheel carrier（303）On be provided with it is more Individual while and central gear（302）And output gear（305）The dual planetary gear group of engagement, the dual planetary gear group include inner planet Wheel（306）, outer planet round（307）Be rotatably installed on planetary wheel carrier（303）On planet wheel spindle（308）, the expert Star-wheel（306）And outer planet round（307）Planet wheel spindle is fixedly mounted respectively（308）Both ends, the inner planets round（306）With in Heart gear（302）Engagement, the outer planet round（307）With output gear（305）Engagement, the planet wheel decelerator rear axle （3）Also include being used for the central gear for controlling two groups of planetary gear output precisions（302）Rotating speed and the course changing control mechanism turned to.

8. the multiple-speed gear-box of agricultural crawler body according to claim 7, it is characterised in that：The course changing control mechanism Including turning to drive bevel gear（309）Drive bevel gear is turned to for driving（309）Rotary drive（311）, each planet Take turns the central gear of output precision（302）It is connected with steering driven wheel of differential（312）, the steering of two groups of planetary gear output precisions Driven wheel of differential（312）It is divided into steering drive bevel gear（309）Both sides and with turn to drive bevel gear（309）Engagement.

9. the multiple-speed gear-box of agricultural crawler body according to claim 7, it is characterised in that：The casing（100）On Corresponding each planetary gear output precision is mounted on being used for drive shaft（304）The brake apparatus braked（310）, the braking Device（310）Including being fixedly arranged on casing（100）On axle sleeve（3101）, the axle sleeve（3101）It is sheathed on drive shaft（304）Outside Portion, the axle sleeve（3101）Inside it is provided with and stator is braked by multi-disc（3102）The stator group of composition, multi-disc braking stator（3102） Along drive shaft（304）Axial direction, which slides, to be set, the drive shaft（304）Upper corresponding arbitrary neighborhood two panels braking stator（3102） It is mounted on a piece of being inserted in the adjacent two panels braking stator（3102）Between braking moving plate（3103）, the braking moving plate （3103）Drive shaft is slidedly arranged on vertically（304）On, the braking stator of described stator group one end（3102）With axle sleeve（3101）It Between be provided with brake pad（3104）, the stator group other end, which is provided with, brakes briquetting（3105）, the brake apparatus（310）Also include using Briquetting is braked in driving（3105）With brake pad（3104）Coordinate the braking drive component for compressing or unclamping stator group.

10. the multiple-speed gear-box of agricultural crawler body according to claim 9, it is characterised in that：The braking driving group Part includes spragging gear（3106）, braking rack（3107）Rack is braked with driving（3107）Reciprocating telescopic drive part, The braking briquetting（3105）Along drive shaft（304）Axially it is slidedly arranged on axle sleeve（3101）On, the spragging gear（3106）It is arranged In drive shaft（304）Above and can be relative to drive shaft（304）Rotate and along drive shaft（304）Slide axially, the spragging gear （3106）With braking briquetting（3105）Helical chisel teeth is connected, the braking rack（3107）With spragging gear（3106）Nibble Close, the axle sleeve（3101）On be additionally provided with prevention spragging gear（3106）The stop member slided to the direction away from stator group.