CN208453091U - A kind of tractor frame and traveling wheel system - Google Patents

Abstract

The utility model relates to tractor technical fields, specially a kind of tractor frame and traveling wheel system, the front support beam and rear support crossbeam being oppositely arranged including front and back, side support stringer is respectively and fixedly provided between the left end of the front support beam and the left end of the rear support crossbeam and between the right end of the front support beam and the right end of the rear support crossbeam, it arches upward upwards at the intermediate position of the front support beam, it arches upward upwards at the intermediate position of the rear support crossbeam, the side support stringer includes the main support beam that tandem extends, the rear cant beam being obliquely extended to the back lower place and be used to install fast pulley that the forward downward of the main support beam being fixedly arranged at the front end with was obliquely extended and was used to install the preceding cant beam of tensioning wheel and the rear end of the main support beam is fixed with, structure is more stable, operator's use is more comfortable, it operates happier.

Description

A kind of tractor frame and traveling wheel system

Technical field

The utility model relates to tractor technical field, specially a kind of tractor frame and traveling wheel system.

Background technique

Existing crawler tractor is widely used, but in fact, still has many insufficient places, for example, in machine In terms of frame: crossbeam straight shelves in front and back connect, and vibration is big, and rack is easy to crack, operate fatiguability；The direct aperture of supporting beam couples Zhi Chong Wheel, bearing capacity reduce, and support beam strength is insufficient, poor reliability；Structure is complicated, at high cost, to find out its cause, the power work of tractor When work, tractor transfer, workpiece operation etc. move, it can all generate strength and vibrate, vibration causes rack fatigue crack, intensity Decline, rack failure；Associated mode frame vibration causes complete machine oscillation, operator's fatiguability, or even causes operator's lesion, And be to increase intensity, many reinforcing ribs are added, structure is complicated, increased costs, has for example in terms of wheel system of walking: meeting in traveling When uneven road surface, machine gravity is also with road surface height, dipping and heaving, machine top slope serious vibration, machine easy to damage, operation Fatiguability；When machine obstacle detouring, complete machine can all be jacked up, crawler belt attached area it is small, tractive force decline, machine obstacle detouring is difficult；Turning When can intermittence bounce；Be easy crawler belt, to find out its cause, prior art thrust wheel it is fixed or have wherein one group be float, make It is big that industry opportunity thinks highly of heart dipping and heaving, and meeting barrier machine can be forced through, and causes great impact and vibration；Encounter bigger obstacle Object can jack up complete machine, hanging machine, and crawler bearing area reduces, tractive force decline；Deep mud foot zig zag, guiding iron cross crawler belt Tooth causes derailed crawler belt to drop out.

A kind of paddy field crawler tractor as disclosed in the Chinese patent of Publication No. 103332228B, the triangle in tractor Creeper undercarriage is related to agricultural mechanical field.Triangle creeper undercarriage, including it is driving wheel, traveling wheel, directive wheel, trapezoidal Bracket and crawler belt, the driving wheel and traveling wheel are respectively arranged on above and below trapezoid support, and directive wheel is set to trapezoid support Lower section both ends, the crawler belt form the crawler haulage of triangle around driving wheel, directive wheel and traveling wheel, which is related to Tractor there is above-mentioned problem.

Utility model content

That the purpose of the utility model is to provide a kind of structures is more stable, operator is using more comfortable, operation is happier Tractor frame and traveling wheel system.

The above-mentioned technical purpose of the utility model has the technical scheme that a kind of tractor frame, The front support beam and rear support crossbeam being oppositely arranged including front and back, the left end of the front support beam and the rear support crossbeam Left end between and the front support beam right end and the rear support crossbeam right end between to be respectively and fixedly provided with collateral support vertical The intermediate position of beam, the front support beam is arched upward upwards, and the intermediate position of the rear support crossbeam is arched upward upwards, described collateral Support stringer include tandem extend main support beam, the main support beam the forward downward being fixedly arranged at the front end be obliquely extended simultaneously For install tensioning wheel preceding cant beam and the main support beam being obliquely extended to the back lower place of being fixed with of rear end and be used to install The rear cant beam of fast pulley.

As to the preferred of utility model, the main support beam, front support beam and rear support crossbeam are hollow beam.

As to the preferred of utility model, it is fixedly connected with block before being fixedly arranged at the front end with of the main support beam, it is fixed before described It is fixed with front panel on front side of link block, the preceding cant beam, the downside one of the front panel are fixed on front side of the front panel Body is connected with the noseplate for carrying on the downside of the preceding cant beam that forward downward is obliquely extended.

As to the preferred of utility model, the preceding cant beam includes the interval setting of left and right two and forward downward is obliquely extended Front end panel, the front end panel top of two of the preceding cant beam by rear side part between be connected with before transition connect Be fixedly connected on front side of fishplate bar, the rear side of the front end panel and the front panel, the downside of the front end panel and it is described before It is fixedly connected on the upside of bottom plate, the wheel shaft offered on front side of the front end panel for the tensioning wheel is set up and to open front Front axle mounting groove, the rotation rotated through for the tensioning wheel is formed between two front end panels of the preceding cant beam Section, the noseplate, which is offered, to be rotated through for the tensioning wheel and to the open slot of open front.

As to the preferred of utility model, it is described after cant beam include the rear panel fixed with the rear end of the main support beam with And after the interval of the left and right that is connected with respectively of rear side of the rear panel or so two is arranged and is obliquely extended to the back lower place Support plate offers the hind axle mounting groove set up for the wheel shaft of the fast pulley on the downside of the rear bearing sheet, described to retread Be fixed with the rear top plate being obliquely extended to the back lower place between the upside of two rear bearing sheets of beam, it is described after two of cant beam The rear bottom plate being obliquely extended to the back lower place, branch after two of the rear cant beam are described are fixed between the downside of the rear bearing sheet The rotation section rotated through for the fast pulley is formed between fagging, offers confession on the rear top plate and the rear bottom plate The fast pulley rotates through and aft-opening open slot.

It extends to form forward and is overlapped in the main support beam as the front side to the preferred of utility model, the rear top plate The rear top extension board of side, the front side of the rear bottom plate extend to form forward the rear bottom being overlapped on the downside of the main support beam and extend Plate.

As to the preferred of utility model, the main support beam is provided with by the position of its front end for installing thrust wheel Front overhang hanging component, the main support beam is provided with the rear suspension assembly for being also used for installation thrust wheel by the position of its rear end, described Front overhang hanging component includes preceding first suspension plate being fixed on the main support beam on the inside of rack and is fixed on the main support beam The second suspension plate and preceding first suspension plate and preceding second suspension plate or so are oppositely arranged, the rear overhang before shell outside Hanging component includes rear first suspension plate being fixed on the main support beam on the inside of rack and is fixed on the main support beam by machine Rear second suspension plate on the outside of frame and it is described after the first suspension plate and it is described after second suspension plate or so be oppositely arranged, described preceding the The suspension installation of left and right perforation is offered in one suspension plate, preceding second suspension plate, rear first suspension plate and rear second suspension plate Hole.

As to the preferred of utility model, be fixed on the downside of the main support beam positioned at preceding first suspension plate and before The first guide and limit plate in front of second suspension plate and positioned at the of preceding first suspension plate and preceding second suspension plate rear Two guide and limit plates are further fixed on the downside of the main support beam after described in front of first suspension plate and rear second suspension plate Third guide and limit plate, the third guide and limit plate is located at the rear of the second guide and limit plate.

As to the preferred of utility model, pass through the first stiffening plate between preceding first suspension plate and the main support beam It is fixedly connected, is fixedly connected between preceding second suspension plate and the main support beam by the second stiffening plate, described rear first It is fixedly connected between suspension plate and the main support beam by third stiffening plate, rear second suspension plate and the main support beam Between be fixedly connected by the 4th stiffening plate.

As to the preferred of utility model, preceding first suspension plate is fixed with disposed thereon on the position on the inside of rack Suspension installing hole above preceding reinforcing rib, it is described after the first suspension plate be fixed on the position on the inside of the rack it is disposed thereon Rear reinforcing rib above suspension installing hole.

As to the preferred of utility model, a left side for the left and right width of the first guide and limit plate, the second guide and limit plate The left and right width of right width and third guide and limit plate is all larger than the left and right width of the lower portion of the main support beam.

The rack the utility model has the advantages that providing in the front and back support beam of arc-shaped to arch upward and in the arc-shaped to arch upward Side support stringer is the rack of the Mian first formula mainly formed, has transmitting well and distribution to act on load impacting power, endurance Greatly, vibration damping antivibration is strong, good reliability, and structure is simultaneously uncomplicated, and cost is also controllable；Side support stringer is whole also arched, to front and back The impact force of direction of travel has a dispersion transmitting well, and the bow-shaped structural of front and back support beam, load to up and down direction and The vibration of the workpieces such as engine has diffusion decomposition well, so that rack can bear bigger load, to impact force Also cloth outputting can be more preferably spread, rack Cracking Failure is avoided, up and down direction and in the front-back direction two-way bow-shaped structural make whole frame Mian shape structure is formed, drag resistance to shock is more preferable, improves stressed effect and effectiveness in vibration suppression；Due to good vibration damping antivibration effect and Good receiving load-carrying ability, better reliability, complete machine oscillation is small, and operator is more comfortable, improve the happy feeling of operation by.

A kind of tractor traveling wheel system further includes two and installs respectively including any of the above-described tractor frame The tensioning wheel on the preceding cant beam of the left and right sides, two be mounted on the left and right sides it is described after cant beam fast pulley, Two or so the driving wheels being oppositely arranged, two or so the crawler belts being oppositely arranged, on the front overhang hanging component of the left and right sides The preceding bogie assemblies of thrust wheel are provided with, are mounted on the rear branch with thrust wheel on the rear suspension assembly of the left and right sides Roller component, every crawler belt are wound on the Zhi Chong with the driving wheel of its same side, the preceding bogie assemblies On wheel, the thrust wheel of the rear bogie assemblies, the fast pulley and the driving wheel, the driving wheel of the left and right sides It is driven by same driving device.

As to the preferred of utility model, the preceding bogie assemblies include: two pieces or so the first balances being oppositely arranged Plate；Preceding first axle sleeve being arranged successively from front to back, preceding second axle sleeve, preceding third are fixed between two blocks of first balance plates Axle sleeve；Across the preceding first axle of the preceding first axle set setting；The second axis before the preceding second axle sleeve setting；Across institute The preceding third axis of third axle sleeve setting before stating, the thrust wheel, the preceding third are respectively installed in the both ends of the preceding first axle A thrust wheel is also respectively installed at the both ends of axis, and the both ends of preceding second axis are each passed through in preceding first suspension plate Suspension installing hole and suspension installing hole in preceding second suspension plate are simultaneously mounted on preceding first suspension plate and described preceding In two suspension plates, the rear bogie assemblies include: two pieces or so the second balance plates being oppositely arranged；Two pieces of second balances Rear first axle sleeve, rear second axle sleeve, rear third axle sleeve being arranged successively from back to front are fixed between plate；Across described rear first The rear first axle of axle sleeve setting；Across rear second axis of the rear second axle sleeve setting；Across the rear third axle sleeve setting The thrust wheel is respectively installed at third axis afterwards, the both ends of the rear first axle, and the both ends of the rear third axis also respectively install one A thrust wheel, it is described after the second axis both ends be each passed through it is described after suspension installing hole in the first suspension plate and it is described after Suspension installing hole in second suspension plate and be mounted on it is described after the first suspension plate and it is described after in the second suspension plate.

As to the preferred of utility model, under original state, the upside of first balance plate is by leaning on preceding second axis Respectively forwardly lower section extends and extends to form preceding first lower slope section and preceding second lower slope section to the back lower place at the position of surface, described By the position right above rear second axis, lower section extends respectively backward and forward downward extends shape for the upside of second balance plate At rear first lower slope section and rear second lower slope section.

As to the preferred of utility model, under original state, the gradient of preceding first lower slope section is less than preceding second descending The gradient of section, the gradient of rear first lower slope section are less than the gradient of rear second lower slope section.

Extend and be used for and described first as left and right to the preferred of utility model, is equipped on preceding first lower slope section The front limit to lean on the downside of guide and limit plate against column, be equipped on first lower slope section after described left and right extend and for The rear limit to lean on the downside of the extension board of bottom after described is against column.

As the spacing distance to the preferred of utility model, between two thrust wheels at the both ends of the preceding first axle Interval greater than the left and right width of the first guide and limit plate, between two thrust wheels at the both ends of the rear first axle Distance is greater than the left and right width of the rear bottom extension board.

As to the preferred of utility model, the first guide and limit plate, the second guide and limit plate, third guide and limit plate Rectangular, the front limit is cylindrical against column against column and rear limit.

The traveling wheel system the utility model has the advantages that thrust wheel is entirely using floating, when movement, crawler belt can be with barrier when meeting barrier barrier The coated creep of object, traveling are not run smoothly；Floating type thrust wheel, in more excessive barrier, floating thrust wheel can float evacuation one by one, Machine gravity holding is not raised with obstacle detouring, and overtaking is not run smoothly；When obstacle detouring, the thrust wheel encountered floats, other thrust wheels Holding and ground face contact, will not jack up hanging crawler belt, tractive force decline because of barrier, and the floating thrust wheel ability of creeping is improved； The structure and thrust wheel of guide and limit rationally design, and guide crawler belt to advance in guide rail always in operation.

By the modes power transmissions such as mechanical, hydraulic, electric power or machinery+hydraulic to driving wheel, driving wheel drives crawler belt fortune It is dynamic；Tensioning wheel tensioned tracks, and adjust crawler belt tighting degree；The structure of guide and limit is higher by than thrust wheel, guarantees that track guide begins It is not stripped off in the structure control of guide and limit eventually and oversteps the limit and fall crawler belt；Barrier is met, crawler belt is jacked up, floating thrust wheel floats Come, more floating roller drops to normal position with crawler belt again later, and the crawler belt being grounded is wriggled with uneven road surface people, reduces top Slope vibration.

Detailed description of the invention

Fig. 1 is the schematic perspective view of the rack of the utility model embodiment 1；

Fig. 2 is the schematic perspective view of the front support beam of the utility model embodiment 1；

Fig. 3 is the schematic perspective view of the rear support crossbeam of the utility model embodiment 1；

Fig. 4 is the schematic perspective view of the side support stringer in the left side of the utility model embodiment 1；

Fig. 5 is the schematic perspective view of the side support stringer on the right side of the utility model embodiment 1；

Fig. 6 is the schematic perspective view of the traveling wheel system of the utility model embodiment 2；

Fig. 7 is the schematic perspective view of the traveling wheel system left part of the utility model embodiment 2；

Fig. 8 is the schematic perspective view at another visual angle Fig. 7；

In the quick condition figure of traveling process after thrust wheel of the Fig. 9 to remove left part in Fig. 7；

Figure 10 is the three-dimensional knot of forward and backward bogie assemblies in the traveling wheel system right part of the utility model embodiment 2 Structure schematic diagram；

Figure 11 is the three-dimensional knot for removing the basic framework of the forward and backward bogie assemblies after thrust wheel and each axis in Figure 10 Structure schematic diagram.

, front support beam, 2, rear support crossbeam, 3, side support stringer, 31, main support beam, 32, preceding cant beam, 33, retread Beam, 41, tensioning wheel, 42, fast pulley, 311, it is preceding be fixedly connected with block, 321, front panel, 322, noseplate, 3201, front end panel, 3202, preceding transition connecting plate, 32010, front axle mounting groove, 331, rear panel, 3301, rear bearing sheet, 33010, hind axle peace Tankage, 332, rear top plate, 333, rear bottom plate, 3320, push up extension board afterwards, 3330, rear bottom extension board, 7, thrust wheel, 51, preceding first Suspension plate, 52, preceding second suspension plate, 61, rear first suspension plate, 62, rear second suspension plate, 56, suspension installing hole, 71, first Guide and limit plate, the 72, second guide and limit plate, 73, third guide and limit plate, the 81, first stiffening plate, the 82, second stiffening plate, 83, third stiffening plate, the 84, the 4th stiffening plate, 510, preceding reinforcing rib, 610, rear reinforcing rib, 43, driving wheel, 44, crawler belt, 9a, One balance plate, 911a, preceding first axle sleeve, 912a, preceding second axle sleeve, 913a, preceding third axle sleeve, 9110a, preceding first axle, 9120a, preceding second axis, 9130a, preceding third axis, 9b, the second balance plate, 911b, rear first axle sleeve, 912b, rear second axle sleeve, 913b, rear third axle sleeve, 9110b, rear first axle, 9120b, rear second axis, 9130b, rear third axis, 91a, preceding first descending Section, 92a, preceding second lower slope section, 91b, rear first lower slope section, 92b, rear second lower slope section, 711, front limit against column, 712, after Limit is against column, 1000, front side gusset, 2000, reinforcement side mounting plate, 3000, foot prop.

Specific embodiment

Following specific embodiments are only the explanation to utility model, are not the limitation to utility model, this field Technical staff can according to need the modification that not creative contribution is made to the present embodiment after reading this specification, but only It will be in the scope of the claims of utility model all by the protection of Patent Law.

Embodiment 1, as shown in Fig. 1,2,3,4,5, a kind of tractor frame, the front support beam being oppositely arranged including front and back 1 and rear support crossbeam 2, between the left end of the front support beam 1 and the left end of the rear support crossbeam 2 and the front support Side support stringer 3 is respectively and fixedly provided between the right end of crossbeam 1 and the right end of the rear support crossbeam 2, in the front support beam 1 Between position arch upward upwards, the intermediate position of the rear support crossbeam 2 is arched upward upwards, the side support stringer 3 include tandem The main support beam 31 of extension, the forward downward of the main support beam 31 being fixedly arranged at the front end with are obliquely extended and are used to install tensioning wheel What 41 preceding cant beam 32 and the rear end of the main support beam 31 were fixed with is obliquely extended to the back lower place and is used to install fast pulley 42 Rear cant beam 33.In the rack, front support beam 1 and rear support crossbeam 2 have been respectively formed bowed structure, meanwhile, the side of two sides Support stringer 3 has also been respectively formed bowed structure, forms the application rack of Mian first formula structure, has well to load impacting power Transmitting and distribution effect, endurance is big, and vibration damping antivibration is strong, good reliability.

Wherein, the main support beam 31, front support beam 1 and rear support crossbeam 2 can use hollow beam, rather than real The structure of the heart.The left end of front support beam 1 with left side main support beam 31 by front end right positions can by being welded and fixed, And the right end of front support beam 1 leans on the leftward position of front end can be preceding by being welded and fixed, certainly with the main support beam 31 on right side It also needs to weld some connection frames in support beam 1 to be attached with vehicle body other component and 1 left and right ends of front support beam Lower part can weld the front side gusset 1000 of one piece of triangular shape or trapezoidal shape again respectively and can be respectively by the front side of left and right two Gusset 1000 is welded further fixation, reinforcement structure intensity with the main support beam 31 of the left and right sides again；Then support beam 2 and a left side When right two sides main support beam 31 is fixed, due to needing to assemble multiple labyrinths such as driving device on rear side of tractor, it should Better structural support is provided, so, a reinforcement side mounting plate is welded in the rear end of the rear support crossbeam 2 of the left and right sides 2000, then support beam 2 is fixed after being just welded on by both ends on the reinforcement side mounting plate 2000 of the left and right sides, certainly, It yet needs to weld some connection frames on rear support crossbeam 2 to be attached with vehicle body other component and rear support crossbeam 2 or so two The lower part at end can weld a foot prop 3000 again respectively and can pass through two foot props 3000 in the left and right main branch with left side again respectively Leftward position of the support beam 31 by the right positions of rear end and the main support beam 31 on right side by rear end is welded.

The structure of the side support stringer 3 of the left and right sides is preferably designed to the same and is left and right mirror symmetry again, so The structure that support stringer 3 further refines in side, it should be the left and right sides side support stringer 3 carry out simultaneously and be in left Right mirror symmetry, so the structural order of front and back is consistent, and the structure of left and right directions is in mirror symmetry.Below with a left side For the visual angle of the side support stringer 3 of side, the structure design more refined is described:

It is fixedly connected with block 311 before being fixedly arranged at the front end with of the main support beam 31, the front side that block 311 is fixedly connected with before described is solid Surely there is front panel 321, the front side of the front panel 321 is fixed with the preceding cant beam 32, and the downside of the front panel 321 integrally connects Be connected to that forward downward is obliquely extended for the noseplate 322 that is carried on the downside of the preceding cant beam 32, fixed form here can lead to The mode of welding is crossed, fixed form is subsequently noted in specification can be by the way of welding；

The preceding cant beam 32 includes the interval setting front end panel 3201 that simultaneously forward downward is obliquely extended of left and right two, described Transition connecting plate 3202 before 3201 top of front end panel of two of preceding cant beam 32 is connected between the part of rear side, Integrally connected mode can using integrally forging or be integrally formed or integrated bending by the way of realize, one next referred to Body connection can also realize that the rear side of the front end panel 3201 and the front side of the front panel 321 are fixed using these modes Connection, the downside of the front end panel 3201 are fixedly connected with the upside of the noseplate 322, the front end panel 3201 Front side offers the wheel shaft for the tensioning wheel 41 and sets up and to the front axle mounting groove 32010 of open front, the preceding cant beam 32 Two front end panels 3201 between form the rotation section rotated through for the tensioning wheel 41, the noseplate 322 It offers and is rotated through for the tensioning wheel 41 and to the open slot of open front；

Cant beam 33 includes the rear panel 331 and the rear panel fixed with the rear end of the main support beam 31 after described The rear bearing sheet that the interval of left and right two that 331 rear side or so is connected with respectively is arranged and is obliquely extended to the back lower place 3301, the downside of the rear bearing sheet 3301 offers the hind axle mounting groove 33010 set up for the wheel shaft of the fast pulley 42, The rear top plate being obliquely extended to the back lower place is fixed between the upside of two rear bearing sheets 3301 of cant beam 33 after described 332, it is described after cant beam 33 two rear bearing sheets 3301 downside between be fixed with the rear bottom being obliquely extended to the back lower place Plate 333, it is described after cant beam 33 two rear bearing sheets 3301 between form the rotation rotated through for the fast pulley 42 Section, it is described after top plate 332 and it is described after offer on bottom plate 333 and rotated through for the fast pulley 42 and aft-opening Open slot.The front side of top plate 332 extends to form forward the rear top extension board for being overlapped on 31 upside of main support beam after described 3320, overlapped, and position can be further by being welded and fixed.The front side of bottom plate 333, which extends to form forward, after described is overlapped on institute The rear bottom extension board 3330 of 31 downside of main support beam is stated, position can be further by being welded and fixed likewise, overlapped here.

Further, the main support beam 31 is provided with the forward mounting group for installing thrust wheel 7 by the position of its front end Part, the main support beam 31 are provided with the rear suspension assembly for being also used for installation thrust wheel 7, the forward mounting by the position of its rear end Component includes preceding first suspension plate 51 being fixed on the main support beam 31 on the inside of rack and is fixed on the main support beam 31 The second suspension plate 52 and preceding first suspension plate 51 and preceding second suspension plate 52 or so are oppositely arranged, institute before shell outside Rear suspension assembly is stated to include rear first suspension plate 61 being fixed on the main support beam 31 on the inside of rack and be fixed on the master Supporting beam 31 is left by rear second suspension plate 62 and rear first suspension plate 61 and rear second suspension plate 62 of shell outside The right side is oppositely arranged, in preceding first suspension plate 51, preceding second suspension plate 52, rear first suspension plate 61 and rear second suspension plate 62 Offer the suspension installing hole 56 of left and right perforation.The plate face of preceding first and second suspension plate is also left and right directions, and rear first and second is outstanding The plate face of hanging plate is also left and right directions, and main support beam 31 is partially rectangular-shaped or rectangular-shaped using shape as far as possible, and preceding the One, two suspension installing holes 56 in two suspension plates are two for installing preceding bogie assemblies, in rear first and second suspension plate A suspension installing hole 56 be for install after bogie assemblies, so, the position of all suspension installing holes 56 should be designed The lower section of main support beam 31 then has the part of suspension installing hole 56 all in preceding first and second suspension plate and rear first and second suspension plate It is the bottom surface portions for exceeding main support beam 31 downwards, could effectively carries out installation, the operation of bogie assemblies in this way.Then, The inner side and outer side of rack mentioned in this paragraph, because, front overhang hanging component, rear suspension assembly, preceding bogie assemblies and rear Zhi Chong Wheel assembly two main support beams 31 in left and right be equipped with and be also in left and right mirror symmetry, it is all here for convenience of explanation The orientation for introducing inner side and outer side, by taking the main support beam 31 in left side as an example, then its inside is exactly right side, its outside is just It is left side, if it is the main support beam 31 on right side, then its inside is exactly left side, its outside is exactly right side.

It is refined again for so or using the main support beam 31 in left side as visual angle, because of the main support beam 31 on right side Be that left and right mirror symmetry does same design: the downside of the main support beam 31 is fixed with positioned at preceding first suspension plate, 51 He The first guide and limit plate 71 in 52 front of preceding second suspension plate and it is located at preceding first suspension plate 51 and preceding second suspension plate The second guide and limit plate 72 at 52 rears, the downside of the main support beam 31 are further fixed on positioned at 61 He of rear first suspension plate The third guide and limit plate 73 in 62 front of the second suspension plate, the third guide and limit plate 73 are located at second guide and limit afterwards The rear of plate 72.The plate face of first guide and limit plate 71, the second guide and limit plate 72 and third guide and limit plate 73 is all up and down Direction setting, and rear bottom extension board 3330 above-mentioned can be used as the 4th guide and limit plate and use, or redesign one New the 4th guide and limit plate with aforementioned first, second and third guide and limit plate same structure, and this rear bottom extension board 3330 or The 4th guide and limit plate installation site of person is positioned at the rear of rear first suspension plate 61 and rear second suspension plate 62, wherein First guide and limit plate 71 and the second guide and limit plate 72 are to carry out guide and limit, and third guide and limit for preceding bogie assemblies Plate 73 and rear bottom extension board 3330 or the 4th guide and limit plate are to carry out guide and limit for rear bogie assemblies, behind can in train System further describes, and rectangular slab can be used in the first, second and third guide and limit plate.First guide and limit plate 71 and the master The downside fixation of supporting beam 31 is equally can be by welding, further, and the two, which againsts, is welded and fixed rear lap up and down Area is less than the area of the first guide and limit plate 71 namely the first guide and limit plate 71 the right and left all can exposed portion It is not Chong Die with the downside of main support beam 31, including other guide and limit plates are also so to design, then need the first guiding limit The left and right width of the left and right width of position plate 71, the left and right width of the second guide and limit plate 72 and third guide and limit plate 73 is big Left and right width in the lower portion of the main support beam 31 further includes rear bottom extension board 3330 or the 4th guide and limit certainly Plate, the purpose done so the process of guide and limit that the thrust wheel of forward and backward bogie assemblies will not be wiped to encounter main support Beam 31, meanwhile, guarantee the stability and balance of structure connection, in addition, the center line of the first, second and third guide and limit plate between left and right As far as possible with face above and below the center line between left and right of the lower portion of the main support beam 31, guarantee the first, second and third guide and limit Symmetry at left and right sides of plate with main support beam 31 when fixed.

Further, connect between preceding first suspension plate 51 and the main support beam 31 by the way that the first stiffening plate 81 is fixed It connects, is fixedly connected between preceding second suspension plate 52 and the main support beam 31 by the second stiffening plate 82, described rear first Be fixedly connected between suspension plate 61 and the main support beam 31 by third stiffening plate 83, it is described after the second suspension plate 62 and described Be fixedly connected between main support beam 31 by the 4th stiffening plate 84, the first, second, third and fourth stiffening plate can using rectangular slab and Board direction is towards left and right directions, and the striped spatial and same of front-rear direction extension can be reserved inside each stiffening plate Multiple spaced multiple striped spatials up and down can be designed in stiffening plate, wherein first adds by taking the first stiffening plate 81 as an example Strong plate 81 is folded between the side of main support beam 31 and preceding first suspension plate 51 and the solderable fixed knot for forming fitting overlapping Structure, between the front and back of the first stiffening plate 81 between the front and back that size is preferably greater than preceding first suspension plate 51 apart from size, this Sample can make the first stiffening plate 81 can also have after Chong Die with preceding first suspension plate 51 front and back two parts expose without with The preceding overlapping of first suspension plate 51 and the first stiffening plate 81 and the combination of preceding first suspension plate 51 can form the structure of T-type, And the position of the first stiffening plate 81 is the top positioned at suspension installing hole 56, other second and third, four stiffening plates hang with corresponding Structure between plate can also be using structural style as above-mentioned first stiffening plate 81 and preceding first suspension plate 51；

Preceding first suspension plate 51 is fixed with 56 top of suspension installing hole disposed thereon on the position on the inside of rack Preceding reinforcing rib 510, it is described after the first suspension plate 61 be fixed with suspension installing hole disposed thereon on the position on the inside of the rack The extending direction of the rear reinforcing rib 610 of 56 tops, preceding reinforcing rib 510 and rear reinforcing rib 610 is disposed as front-rear direction, equally , if it is the first suspension plate 51 before in the main support beam in left side before then it namely has on its right side on the inside of rack Reinforcing rib 510, if it is then its namely its left side on the inside of rack of the first suspension plate 51 before in the main support beam in left side It is upper that there is preceding reinforcing rib 510.

Embodiment 2, as shown in Fig. 6,7,8,9,10,11, a kind of tractor traveling wheel system, including described in embodiment 1 Tractor frame, further include two be separately mounted to the left and right sides the preceding cant beams 32 on the tensioning wheel 41, two It is mounted on the fast pulley 42 of the rear cant beam 33 of the left and right sides, two or so the driving wheels being oppositely arranged, 43, two or so phases To the crawler belt 44 of setting, the preceding bogie assemblies with thrust wheel 7 are mounted on the front overhang hanging component of the left and right sides, left and right Two sides it is described after be mounted on the rear bogie assemblies with thrust wheel 7 on suspension assembly, every crawler belt 44 be wound on The driving wheel 43 of its same side, the preceding bogie assemblies the thrust wheel 7, it is described after bogie assemblies the branch On roller 7, the fast pulley 42 and the driving wheel 43, the driving wheel 43 of the left and right sides is driven by same driving device It is dynamic.

For the traveling wheel system, the subsystem that entire rack two sides are related to wheel is also left and right mirror symmetry, the wheel The subsystem of son includes tensioning wheel 41, fast pulley 42, driving wheel 43, crawler belt 44, preceding bogie assemblies, rear bogie assemblies, this In the subsystem of wheel do not include driving device, but driving device can using one simultaneously to the driving wheel 43 of the left and right sides into Row driving, driving device can design the position between the driving wheel 43 of the left and right sides, can using mechanical, hydraulic, electric power, Or the existing conventional driving device such as mechanical+hydraulic delivers power to the driving wheel 43 of the left and right sides, for example, by using machinery+liquid The motor configuration of pressure simultaneously can drive the driving wheel 43 of two sides to operate in the synchronous transmission shaft of two sides setting, of course, it is possible to according to It needs to design and switches synchronous or nonsynchronous driving structure according to actual road conditions.

Below specifically once the left and right sides wheel subsystem, due to being that can be preferably designed to left and right mirror symmetry , so, we are illustrated with the subsystem of the wheel in left side, and in the subsystem of entire wheel, tensioning wheel 41 is located at most Front, behind be successively preceding bogie assemblies, rear bogie assemblies, fast pulley 42, and driving wheel 43 is located at by back upper place Position, such tensioning wheel 41, fast pulley 42, driving wheel 43 are distributed the basic framework knot to form tractor triangle crawler belt in triangular shape Structure, then the thrust wheel 7 in the preceding bogie assemblies and rear bogie assemblies between tensioning wheel 41 and fast pulley 42 is mixed, with regard to group At the composition of all wheels of the subsystem of wheel, crawler belt 44 is just wound on the outer profile of the formation of all these wheels, In, the position of fast pulley 42 is fixed but is able to rotate, and tensioning wheel 41 be can carry out position adjustment to adjust crawler belt 44 Elasticity, so, the pulling devices etc. of some tensioning adjustings should be arranged on the shell outside position for side support stringer 3, this A little devices can be using the device of existing tensioning adjusting.And preceding bogie assemblies and rear bogie assemblies in the application On thrust wheel 7 can float, specific structure is as follows:

The preceding bogie assemblies include: two pieces or so the first balance plate 9a being oppositely arranged；Two pieces of first balances The preceding first axle sleeve 911a, preceding second axle sleeve 912a, preceding third axle sleeve 913a being arranged successively from front to back are fixed between plate 9a； Across the preceding first axle 9110a of the preceding first axle sleeve 911a setting；Second before the preceding second axle sleeve 912a setting Axis 9120a；Across the preceding third axis 9130a of the preceding third axle sleeve 913a setting, the both ends of the preceding first axle 9110a are respectively pacified The thrust wheel 7 is filled, a thrust wheel 7, preceding second axis are also respectively installed in the both ends of the preceding third axis 9130a The both ends of 9120a are each passed through in the suspension installing hole 56 in preceding first suspension plate 51 and preceding second suspension plate 52 Suspension installing hole 56 is simultaneously mounted in preceding first suspension plate 51 and preceding second suspension plate 52, the rear bogie assemblies It include: two pieces or so the second balance plate 9b being oppositely arranged；Be fixed between two pieces of the second balance plate 9b from back to front according to Rear first axle sleeve 911b, rear second axle sleeve 912b, the rear third axle sleeve 913b of secondary arrangement；It is set across the rear first axle sleeve 911b The rear first axle 9110b set；Across the rear second axis 9120b of the rear second axle sleeve 912b setting；Across the rear third axis The rear third axis 9130b of 913b setting is covered, the thrust wheel 7 is respectively installed at the both ends of the rear first axle 9110b, after described A thrust wheel 7 is also respectively installed at the both ends of third axis 9130b, and the both ends of the rear second axis 9120b are each passed through described Afterwards the suspension installing hole 56 in the first suspension plate 61 and it is described after suspension installing hole 56 in the second suspension plate 62 and be mounted on institute After stating in the first suspension plate 61 and rear second suspension plate 62.The design of preceding second axis 9120a and rear second axis 9120b so that First balance plate 9a and the second balance plate 9b can be swung, so that each thrust wheel 7 can float, certainly, same thrust wheel The floating of the thrust wheel 7 of component front and rear sides be it is opposite up and down, the thrust wheel 7 of left and right two on same axis is respectively in main branch The left and right sides region of beam 31 is supportted, and the first balance plate 9a and the second balance plate 9b are respectively positioned on the lower zone of main support beam 31, Allow preceding bogie assemblies and the smooth floating action that must complete thrust wheel 7 of rear bogie assemblies, in this way to meet difference Effective walking of road conditions.

Under original state, i.e., the state to start to walk on level land, the upside of the first balance plate 9a is by leaning on described preceding second Respectively forwardly lower section extends and extends to form preceding first lower slope section 91a and preceding second to the back lower place at position right above axis 9120a The upside of lower slope section 92a, the second balance plate 9b are by leaning on the lower section respectively backward of the position right above the rear second axis 9120b Extend and forward downward extends to form rear first lower slope section 91b and rear second lower slope section 92b.First lower slope section 91a before below For be illustrated, preceding first lower slope section 91a is cooperated with the first guide and limit plate 71, in floating-upward process, under preceding first Slope section 91a can by the limit of the first guide and limit plate 71, preceding first lower slope section 91a in the lower section of the first guide and limit plate 71, Meanwhile first guide and limit plate 71 two thrust wheels 7 on preceding first axle 9110a can be oriented to, the preceding first axle Two thrust wheels 7 on 9110a be positioned at the first guide and limit plate 71 the left and right sides and between region be exactly to supply first to lead Enter to limit plate 71 and preceding first lower slope section 91a is limited, as a result, preceding second lower slope section 92a and the second guide and limit Plate 72 matches, and preceding second lower slope section 92a is in the lower section of the second guide and limit plate 72, and two Zhi Chong on preceding third axis 9130a Wheel 7 is also designed using the structure of the thrust wheel 7 of above-mentioned preceding first axle 9110a and is led with the preceding second lower slope section 92a and second It is corresponding to limit plate 72；First lower slope section 91b and the pairing of rear bottom extension board 3330 or the 4th guide and limit plate afterwards, rear first Lower slope section 91b is in the lower section of rear bottom extension board 3330 or the 4th guide and limit plate, and two Zhi Chong on rear first axle 9110b It takes turns the structure design of thrust wheel 7 of page 7 using above-mentioned preceding first axle 9110a and prolongs with the rear first lower slope section 91b and rear bottom It stretches plate 3330 or the 4th guide and limit plate is corresponding；The second lower slope section 92b and third guide and limit plate 73 match afterwards, and rear second Lower slope section 92b is in the lower section of third guide and limit plate 73, and two thrust wheels 7 on rear third axis 9130b are also using before above-mentioned The structure design of the thrust wheel 7 of first axle 9110a is simultaneously opposite with the rear second lower slope section 92b and third guide and limit plate 73 It answers.In addition, smooth for operation, the spacing distance between two thrust wheels 7 at the both ends of the preceding first axle 9110a Greater than the left and right width of the first guide and limit plate 71, to guarantee that it is too many to the first guide and limit plate 71 that thrust wheel 7 will not be pushed up And cannot rise, also guarantee that the first guide and limit plate 71 is between two thrust wheels 7 at the both ends of preceding first axle 9110a Position be effectively oriented to, certainly, the interval between two thrust wheels 7 at the both ends of the preceding first axle 9110a The distance numerical value bigger than the left and right width of the first guide and limit plate 71 is small as far as possible, does not have to too greatly, for example difference between the two is small This design can also be used in thrust wheel 7 on 3cm, other axis, then two thrust wheels at the both ends of preceding third axis 9130a Spacing distance between 7 is greater than the left and right width of the second guide and limit plate 72；Two institutes at the both ends of first axle 9110b afterwards State the left and right width that the spacing distance between thrust wheel 7 is greater than the rear bottom extension board 3330；The both ends of third axis 9130b afterwards Spacing distance between two thrust wheels 7 is greater than the left and right width of third guide and limit plate 73.

Further, under original state, the gradient of preceding first lower slope section 91a is less than the gradient of the preceding second lower slope section 92a, The gradient of first lower slope section 91b is less than the gradient of the rear second lower slope section 92b after described.

Further, left and right is installed to extend and be used for and first guide and limit on the preceding first lower slope section 91a The front limit that the downside of plate 71 leans against column 711, be equipped on first lower slope section 91b after described left and right extend and for The rear limit that the downside of bottom extension board 3330 leans after described is against column 712, and front limit is against column 711 and rear limit against column 712 each along left and right directions extend, what needs to be explained here is that, when do not have front limit against column 711 and afterwards limit against column 712 When, preceding first lower slope section 91a can be carried out directly with the first guide and limit plate 71 against limit, rear first lower slope section 91b It can directly carry out with rear bottom extension board 3330 or the 4th guide and limit plate against limit, and front limit is set against 711 He of column After limit after column 712, the limit in the section of slope can be preferable over slope section against column and be supported with corresponding guide and limit plate By limit.Certainly, preceding second lower slope section 92a is exactly that can be carried out with the second guide and limit plate 72 against limit by itself, Then the second lower slope section 92b is exactly that can be carried out with third guide and limit plate 73 against limit by itself.

In addition, the first guide and limit plate 71, the second guide and limit plate 72, third guide and limit plate 73 are in rectangle Shape, the front limit are cylindrical against column 712 against column 711 and rear limit.

Claims (18)

1. a kind of tractor frame, which is characterized in that the front support beam (1) and rear support crossbeam being oppositely arranged including front and back (2), between the left end of the front support beam (1) and the left end of the rear support crossbeam (2) and the front support beam (1) Right end and the rear support crossbeam (2) right end between be respectively and fixedly provided with side support stringer (3), the front support beam (1) Intermediate position is arched upward upwards, and the intermediate position of the rear support crossbeam (2) is arched upward upwards, before the side support stringer (3) includes Afterwards linearly extended main support beam (31), the main support beam (31) the forward downward being fixedly arranged at the front end be obliquely extended and be used for What the rear end of the preceding cant beam (32) and the main support beam (31) of installing tensioning wheel (41) was fixed with is obliquely extended simultaneously to the back lower place For installing the rear cant beam (33) of fast pulley (42).

2. a kind of tractor frame according to claim 1, which is characterized in that the main support beam (31), front support are horizontal Beam (1) and rear support crossbeam (2) are hollow beam.

3. a kind of tractor frame according to claim 1, which is characterized in that the front end of the main support beam (31) is fixed It is fixedly connected with block (311) before having, is fixedly connected before described on front side of block (311) and is fixed with front panel (321), the front panel (321) it is fixed with the preceding cant beam (32) on front side of, is connected with that forward downward is oblique to be prolonged on the downside of the front panel (321) The noseplate (322) for carrying on the downside of the preceding cant beam (32) stretched.

4. a kind of tractor frame according to claim 3, which is characterized in that the preceding cant beam (32) includes left and right two The front end panel (3201) that interval setting and forward downward are obliquely extended, two front end panels of the preceding cant beam (32) (3201) top is connected with preceding transition connecting plate (3202) between the part of rear side, after the front end panel (3201) It is fixedly connected on front side of side and the front panel (321), downside and the noseplate (322) of the front end panel (3201) Upside is fixedly connected, offered on front side of the front end panel (3201) for the tensioning wheel (41) wheel shaft set up and forward The front axle mounting groove (32010) of opening is formed for institute between two front end panels (3201) of the preceding cant beam (32) The rotation section that tensioning wheel (41) rotates through is stated, the noseplate (322) offers to be rotated through for the tensioning wheel (41) And to the open slot of open front.

5. a kind of tractor frame according to claim 1, which is characterized in that cant beam (33) includes and the master after described The rear side or so of the fixed rear panel (331) in the rear end of supporting beam (31) and the rear panel (331) is connected with respectively The interval of left and right two rear bearing sheet (3301) that is arranged and is obliquely extended to the back lower place, the downside of the rear bearing sheet (3301) Offer the hind axle mounting groove (33010) set up for the wheel shaft of the fast pulley (42), two institutes of the rear cant beam (33) State the rear top plate (332) for being fixed between the upside of rear bearing sheet (3301) and being obliquely extended to the back lower place, the rear cant beam (33) Two rear bearing sheets (3301) downside between be fixed with the rear bottom plate (333) being obliquely extended to the back lower place, after described The rotation section rotated through for the fast pulley (42), institute are formed between the rear bearing sheet (3301) of two of cant beam (33) State rear top plate (332) and it is described after offer on bottom plate (333) and rotated through for the fast pulley (42) and aft-opening Open slot.

6. a kind of tractor frame according to claim 5, which is characterized in that the front side of the rear top plate (332) is forward Extend to form the rear top extension board (3320) being overlapped on the upside of the main support beam (31), it is described after bottom plate (333) front side to Before extend to form the rear bottom extension board (3330) being overlapped on the downside of the main support beam (31).

7. a kind of tractor frame according to claim 6, which is characterized in that the main support beam (31) is by its front end Position is provided with the front overhang hanging component for installing thrust wheel (7), and the main support beam (31) is provided with by the position of its rear end It is also used for the rear suspension assembly of installation thrust wheel (7), the front overhang hanging component includes being fixed on the main support beam (31) by machine Preceding first suspension plate (51) on the inside of frame and it is fixed on preceding second suspension plate (52) that the main support beam (31) lean on shell outside And preceding first suspension plate (51) and preceding second suspension plate (52) left and right are oppositely arranged, the rear suspension assembly includes being fixed on Rear first suspension plate (61) and be fixed on the main support beam (31) outside rack that the main support beam (31) is leaned on the inside of rack Rear second suspension plate (62) of side and rear first suspension plate (61) and rear second suspension plate (62) left and right are oppositely arranged, In preceding first suspension plate (51), preceding second suspension plate (52), rear first suspension plate (61) and rear second suspension plate (62) Offer the suspension installing hole (56) of left and right perforation.

8. a kind of tractor frame according to claim 7, which is characterized in that the downside of the main support beam (31) is fixed There is the first guide and limit plate (71) in front of preceding first suspension plate (51) and preceding second suspension plate (52) and is located at Second guide and limit plate (72) of preceding first suspension plate (51) and preceding second suspension plate (52) rear, the main support beam (31) the third guiding limit being further fixed on the downside of in front of rear first suspension plate (61) and rear second suspension plate (62) Position plate (73), the third guide and limit plate (73) are located at the rear of the second guide and limit plate (72).

9. a kind of tractor frame according to claim 8, which is characterized in that preceding first suspension plate (51) with it is described It is fixedly connected between main support beam (31) by the first stiffening plate (81), preceding second suspension plate (52) and the main support beam (31) it is fixedly connected between by the second stiffening plate (82), between rear first suspension plate (61) and the main support beam (31) It is fixedly connected by third stiffening plate (83), passes through the 4th between second suspension plate (62) and the main support beam (31) after described Stiffening plate (84) is fixedly connected.

10. a kind of tractor frame according to claim 9, which is characterized in that preceding first suspension plate (51) leans on machine The preceding reinforcing rib (510) being fixed with above suspension installing hole disposed thereon (56) on position on the inside of frame, described rear first is outstanding Hanging plate (61) is fixed with the rear reinforcing rib (610) above suspension installing hole disposed thereon (56) on the position on the inside of rack.

11. a kind of tractor frame according to claim 9, which is characterized in that the first guide and limit plate (71) The left and right width of left and right width, the left and right width of the second guide and limit plate (72) and third guide and limit plate (73) is all larger than institute State the left and right width of the lower portion of main support beam (31).

12. a kind of tractor traveling wheel system, which is characterized in that including any tractor frame of claim 8-11, Further include two be separately mounted to the left and right sides the preceding cant beam (32) on the tensioning wheel (41), two be mounted on left and right Two sides it is described after cant beam (33) fast pulley (42), two or so the driving wheels (43) being oppositely arranged, two or so opposite set The crawler belt (44) set is mounted on the preceding bogie assemblies with thrust wheel (7) on the front overhang hanging component of the left and right sides, left and right The rear bogie assemblies with thrust wheel (7), every crawler belt (44) coiling are mounted on the rear suspension assembly of two sides With the thrust wheel (7) of the driving wheel (43) of its same side, the preceding bogie assemblies, it is described after bogie assemblies The thrust wheel (7), on the fast pulley (42) and the driving wheel (43), the driving wheel (43) of the left and right sides passes through Same driving device driving.

13. a kind of tractor traveling wheel system according to claim 12, which is characterized in that the preceding bogie assemblies packet It includes: two pieces or so the first balance plates (9a) being oppositely arranged；It is fixed with from front to back between two pieces of first balance plates (9a) Preceding first axle sleeve (911a) that is arranged successively, preceding second axle sleeve (912a), preceding third axle sleeve (913a)；Across the preceding first axle Cover the preceding first axle (9110a) of (911a) setting；Across preceding second axis (9120a) of preceding second axle sleeve (912a) setting； Across the preceding third axis (9130a) of preceding third axle sleeve (913a) setting, the both ends of the preceding first axle (9110a) are respectively installed A thrust wheel (7) is also respectively installed at one thrust wheel (7), the both ends of the preceding third axis (9130a), and described preceding the The suspension installing hole (56) and described preceding second that the both ends of two axis (9120a) are each passed through on preceding first suspension plate (51) are hanged Suspension installing hole (56) on hanging plate (52) is simultaneously mounted on preceding first suspension plate (51) and preceding second suspension plate (52) On, the rear bogie assemblies include: two pieces or so the second balance plates (9b) being oppositely arranged；Two blocks of second balance plates Rear first axle sleeve (911b) being arranged successively from back to front, rear second axle sleeve (912b), rear third axle sleeve are fixed between (9b) (913b)；Across the rear first axle (9110b) of rear first axle sleeve (911b) setting；Across rear second axle sleeve (912b) Rear second axis (9120b) being arranged；The rear third axis (9130b) of third axle sleeve (913b) setting after described, it is described after the The thrust wheel (7) is respectively installed at the both ends of one axis (9110b), and the both ends of the rear third axis (9130b) also respectively install one A thrust wheel (7), the both ends of rear second axis (9120b) are each passed through the suspension in rear first suspension plate (61) Mounting hole (56) and it is described after suspension installing hole (56) in the second suspension plate (62) and be mounted on it is described after the first suspension plate (61) and in rear second suspension plate (62).

14. a kind of tractor traveling wheel system according to claim 13, which is characterized in that under original state, described The upside of one balance plate (9a) by the position right above preceding second axis (9120a) respectively forwardly lower section extend with backward under Side extends to form preceding first lower slope section (91a) and preceding second lower slope section (92a), and the upside of second balance plate (9b) is by leaning on institute Lower section extends respectively backward and forward downward extends to form rear first lower slope section at position after stating right above the second axis (9120b) (91b) and rear second lower slope section (92b).

15. a kind of tractor traveling wheel system according to claim 14, which is characterized in that under original state, preceding first The gradient of lower slope section (91a) is less than the gradient of preceding second lower slope section (92a), the gradient of rear first lower slope section (91b) Less than the gradient of rear second lower slope section (92b).

16. a kind of tractor traveling wheel system according to claim 14, which is characterized in that preceding first lower slope section Be equipped on (91a) left and right extend and for the front limit that leans on the downside of the first guide and limit plate (71) against column (711), left and right is installed on rear first lower slope section (91b) to extend and for the downside with the rear bottom extension board (3330) The rear limit to lean is against column (712).

17. a kind of tractor traveling wheel system according to claim 14, which is characterized in that the preceding first axle Spacing distance between the thrust wheel (7) of two of the both ends of (9110a) is greater than a left side for the first guide and limit plate (71) Right width, it is described after first axle (9110b) both ends two thrust wheels (7) between spacing distance be greater than it is described after bottom The left and right width of extension board (3330).

18. a kind of tractor traveling wheel system according to claim 16, which is characterized in that the first guide and limit plate (71), the second guide and limit plate (72), third guide and limit plate (73) are rectangular, the front limit against column (711) and After limit it is cylindrical against column (712).