CN100372714C - Tractor - Google Patents

Abstract

A tractor allowing a cost to be reduced by eliminating a labor for replacing an air compressor each time an engine is mounted on the tractor when the specifications thereof are changed, wherein an air brake mechanism is installed in the traveling part of a towed vehicle, the air compressor is interlockingly arranged continuously with a transmission part, and compressed air is fed from the air compressor to the air brake mechanism to brake the air brake mechanism, whereby since the air compressor is interlockingly arranged continuously with the transmission part, the labor for replacing the air compressor each time the engine is mounted on the tractor when the specifications thereof are changed can be eliminated to provide general versatility to the engine so as to reduce a cost.

Description

Trac.

Technical field

The present invention relates to trac..

Background technology

Present stage, a kind of mode as the vehicle braked apparatus, main hydraulic braking apparatus and the air brake apparatus of adopting, hydraulic braking apparatus have that responsibility is good, simple in structure, Design freedom advantages of higher (for example, with reference to Japanese patent laid-open 5-139284 communique).

On the other hand, the air brake apparatus only depends on the opening and closing operations of actuator valve just can control, just can obtain very big braking force with very little legpower, in addition, because air has compressibi1ity, even so from piping system some escape of airs are arranged, braking force can obviously not reduce yet, exist and to overcome the such characteristics of harsh usage condition.

And, for the air brake apparatus, because do not need the operations such as replacing exhaust of necessary braking liquid in the decomposition assembling of hydraulic braking apparatus, so good work exists and is suitable for most removing bonded assembly and connecting advantages such as for motor vehicle brake gear as connecting.

Therefore, the air brake apparatus is applied to large tractor, city motor bus, trac. and is connected in vehicle etc. with trailer.

And for the air brake apparatus of prior art, it is installed in the timing-gear chamber (timing gear room) of the driving engine of mounting teeth wheel pump etc., makes that producing compressed-air actuated air compressor has nothing to do with clutch operating and be driven all the time.

; for example; though in farm machineries such as trac.; in order to make the working rig lifting that is installed in running part by hydraulic pressure; the hydraulic pressure pump structure is installed in employing on the timing-gear chamber of driving engine, still, if adopt the air compressor that the air brake apparatus is used also to be installed on the structure of timing-gear chamber; then the shape of this timing-gear chamber becomes specially, and existing becomes on the driving engine commonality shortcoming, inconjunction with cost such problem that rises.

Summary of the invention

Therefore, in the present invention, a kind of trac. is provided, change speed gear box portion is connected in primary mover portion, make walking become possibility transmission of power to front vehicle wheel and rear wheel respectively by this change speed gear box portion, and connect via bindiny mechanism and to be pulled vehicle, can draw this and be pulled vehicle, it is characterized in that: the running part that is pulled vehicle is provided with power-absorption fan mechanism, on the other hand, in change speed gear box portion, be connected and be provided with air compressor, from this air compressor with compressed-air supply to power-absorption fan mechanism, make this power-absorption fan mechanism become and can brake.

In addition, the present invention also has feature in following formation.

(1) air compressor is connected and is arranged in a side-walls of change speed gear box portion and sees part between front vehicle wheel and rear wheel from the side, and this air compressor is provided with the operating portion that motion action is used.

(2) air compressor is configured in and sees from the side near the lifting usefulness end difference that is set between front vehicle wheel and the rear wheel.

(3) air compressor be configured in above the ground board of the Drive Section that in change speed gear box portion, is set below.

Description of drawings

Fig. 1 is the lateral plan according to trac. of the present invention.

Fig. 2 is the lateral plan of power-transfer clutch portion and change speed gear box portion.

Fig. 3 is the cross section front view of change speed gear box portion.

Fig. 4 is the instruction diagram of the air pipe arrangement of air compressor and power-absorption fan mechanism.

Fig. 5 is the cross section side-looking instruction diagram of this power-transfer clutch portion and change speed gear box portion.

Fig. 6 is the cross section side-looking instruction diagram of this power-transfer clutch portion.

Fig. 7 is the cross section side-looking instruction diagram of main gearshift portion.

Fig. 8 is the cross section backsight instruction diagram of this main gearshift portion.

Fig. 9 is the amplification cross section backsight instruction diagram on the top of this main gearshift portion.

Figure 10 is the cross section side-looking instruction diagram of secondary gearshift portion and PTO gearshift portion.

Figure 11 is that instruction diagram is overlooked in the cross section of box of tricks.

Figure 12 is the back view of PTO gearshift portion.

Figure 13 is the biopsy cavity marker devices back view of this PTO gearshift portion.

Figure 14 is the cross section side-looking instruction diagram of the power-transfer clutch portion of single clutch specification.

Figure 15 is the blocked operation instruction diagram of air compressor.

The specific embodiment

Below, describe with regard to embodiments of the present invention.

That is to say, according to trac. of the present invention, change speed gear box portion is connected in primary mover portion, make walking become possibility to front vehicle wheel and rear wheel transmission of power respectively by this change speed gear box portion, and be pulled vehicle via bindiny mechanism's connection, can draw this and be pulled vehicle, the running part that is pulled vehicle is provided with power-absorption fan mechanism, on the other hand, in change speed gear box portion, be connected and be provided with air compressor, from this air compressor with compressed-air supply to power-absorption fan mechanism, make this power-absorption fan mechanism become and can brake.

And air compressor is connected and is arranged in a side-walls of change speed gear box portion and sees part between front vehicle wheel and rear wheel from the side, and this air compressor is provided with the operating portion that motion action is used.

And air compressor is disposed at sees the lifting that is configured between front vehicle wheel and the rear wheel from the side with near the end difference, and air compressor is disposed at the below above the ground board of the Drive Section that is provided in the change speed gear box portion.

Below, with reference to the description of drawings embodiments of the invention.

At the A shown in Fig. 1 is trac. of the present invention, and this trac. A is connecting as the trailer B that is pulled vehicle via the C of bindiny mechanism at its rear, can draw this trailer B.

For trac. A, as shown in Fig. 1 and Fig. 2, frame 1 is provided with primary mover portion 2, in this primary mover portion 2, be connected and be provided with change speed gear box portion 4 via power-transfer clutch portion 3, in this change speed gear box portion 4, dispose Drive Section 5, and the PTO gearshift portion 6 that has been connected is is freely loaded and unloaded at the rear portion in this change speed gear box portion 4, below above-mentioned frame 1 via the front bearing box (not shown) pair of right and left front vehicle wheel 7 that has been connected, 7, on the other hand, in above-mentioned change speed gear box portion 4 via rear axle casing 8,8 (with reference to Fig. 3 and Figure 11) and the pair of right and left rear wheel 9 that has been connected, 9.

For trailer B, as shown in fig. 1, on vehicle frame 301, form container 302, on the other hand, front portion at this vehicle frame 301 is equipped with pair of right and left front vehicle wheel 304,304 via front vehicle wheel supporter 303, and via rear wheel supporter 305 pair of right and left rear wheel 306,306,306,306 is installed at the rear portion and forms running part 307.

For the C of bindiny mechanism, as shown in fig. 1, extend back and the dilatory pusher side connecting strap 308 that forms by rearward end from the change speed gear box portion 4 of trac. A, extend forward and the trailer side connecting strap 309 that forms from the front vehicle wheel supporter 303 of trailer B, and the leading section connecting pin 310 each other of hinged connection two connecting straps 308,309 constitutes.

In above-mentioned this formation, main points of the present invention are, as shown in Fig. 1～Fig. 4, the rear wheel supporter 305 of the part of the running part 307 of formation trailer B is provided with power-absorption fan mechanism 311, on the other hand, being connected in change speed gear box portion 4 is provided with air compressor 312, from this air compressor 312 with compressed-air supply to power-absorption fan mechanism 311, can drg by this power-absorption fan mechanism 311 braking pair of right and left rear wheel 306,306.Wherein, the explanation of structure is set, in the structure explanation of change speed gear box described later portion 4, carries out to being connected of air compressor 312 of change speed gear box portion 4.

So, air compressor 312 is set, and it is special that the shape of the timing-gear chamber of aftermentioned driving engine 15 is become, and makes the use of the driving engine 15 with commonality become possibility, can realize the reduction of cost by in change speed gear box portion 4, being connected.

And, air compressor 312 is at a sidewall (being left side wall in the present embodiment) of change speed gear box portion 4, and, in left side view, be connected in the part between front vehicle wheel 7 and rear wheel 9, on this air compressor 312, be provided with the operating handle 313 of the operating portion of using as motion action.

So, because left side wall in change speed gear box portion 4, and air compressor 312 is connected in the part between front vehicle wheel 7 and rear wheel 9 in left side view, so can guarantee to be arranged on the operability of the operating handle 313 on this air compressor 312 well.

And, air compressor 312 be disposed in left side view the lifting that is set between front vehicle wheel 7 and the rear wheel 9 with end difference 314 near.

So, because with air compressor 312 be disposed in left side view the lifting that is set between front vehicle wheel 7 and the rear wheel 9 with end difference 314 near, so, to via lifting with end difference 314 and up and down operator, can be nearby and carry out continuously expeditiously lifting with the lifting action of end difference 314, with operation via the operating handle 313 of air compressor 312.

And, be disposed at above the ground board 315 in left side of the Drive Section 5 that in change speed gear box portion 4, is disposed below.

So, because air compressor 312 is disposed at above the ground board 315 in left side of the Drive Section 5 that in change speed gear box portion 4, is set below, so, can on this ground board 315, not be provided with and dispose air compressor 312 concavo-convexly, thereby can guarantee the livability of the operator on this ground board 315 well.

Here, for Drive Section 5, as shown in Fig. 1～Fig. 3, in change speed gear box portion 4, instrument carrier panel 316 is connected in the rearward end of primary mover portion 2, handle 318 is installed via handle fulcrum 317 on this instrument carrier panel 316, operator's saddle 319 is disposed at the rear position of this handle 318, top at the left and right sides of change speed gear box portion 4 sidewall, be connected with the upwardly extending medial margin portion that forms the pair of right and left ground board 315,315 of rectangular plate shape, make various places board 315,315 become the state that approximate horizontal ground, outside side stretches out in front and back.

And, between the left and right sides lower sidewall of the front portion of the lateral border portion of various places board 315,315 and power-transfer clutch portion 3, be folded with front support body 320,320, in addition, between the left and right sides lower sidewall of the middle part of the lateral border portion of various places board 315,315 and change speed gear box portion 4, be folded with middle part supporter 321,321, in addition, between the left and right sides lower sidewall of the rear portion of the lateral border portion of various places board 315,315 and change speed gear box portion 4, be folded with rear support 322,322.

And, in the lateral border portion of the forebody of various places board 315,315, vertically be provided with lifting with end difference 314,314, and in the latter half of lateral border portion of various places board 315,315, erect rear wheel mudwing 323,323 is being set.

In addition, for lifting end difference 314, as shown in Fig. 2 and Fig. 3, below the lateral border portion of ground board 315, devices spaced apart on fore-and-aft direction and upper end at a pair of ladder supports sheet 324,324 in the upwardly extending front and back of upper and lower is installed, between the lower end of two ladder supports sheets 324,324, set up and be formed with upwardly extending ladder sheet 325 in front and back.

And, the interior side (body side) of described lifting with end difference 314, and, in the up and down width of lifting, dispose air compressor 312 with end difference 314, exempt from the evil of obstacle to protect this air compressor 312.

And, at a pair of ladder supports sheet 324,324 in front and back of using end difference 314 by the lifting that forms the left side, and be set up in the ladder sheet 325 between the lower end of two ladder supports sheets 324,324, and in the ground board 315 formed spaces 326 in left side, dispose the operating handle 313 of air compressor 312, thereby guarantee the operability of this operating handle 313 well.

In addition, as shown in Fig. 1～Fig. 3, on the rear position of air compressor 312, dispose upwardly extending gas tank 327 in front and back, this gas tank 327 is by the upwardly extending perisporium 328 cylindraceous in front and back, form with the front and rear wall 329,330 of the front and back end edge portion that is connected in this perisporium 328, connection is supported in above-mentioned middle part supporter 321 and rear support 322 via connecting supporting blade 331,331.

And, as shown in Figure 4, connection connects gas tank 327 via the first air pipe arrangement 332 on air compressor 312, connection connects valve 334 via the second air pipe arrangement 333 on this gas tank 327, on this valve 334, be communicated with to connect above-mentioned power-absorption fan mechanism 311 via the 3rd air pipe arrangement 335, valve is set on this valve 334 opens and closes lever 336, open and close the brake pedal 338 that is connected and on Drive Section 5, is provided with via pipe link 337 on the lever 336 at this valve.

Wherein, the allocation position of gas tank 327 is not limited to the situation of present embodiment, for example also can be disposed at as with the right side of the body of air compressor 312 opposite sides, in addition, also can be disposed at the rear position of driver's seat 319.

And gas tank 327 also can be cut apart and be formed a plurality ofly, also can consider the body weight balance and is disposed at the position of wanting.

For brake pedal 338, be supported in pedal fulcrum 340 via boss portion 339, the outstanding transmission arm 341 that is provided with on this boss portion 339, between this transmission arm 341 and above-mentioned valve switching lever 336, be folded with pipe link 337, and on boss portion 339, vertically be provided with drg movement arm 342, between the brake service bar 198 (with reference to Fig. 3 and Figure 11) of this drg movement arm 342 and aftermentioned drg portion 191, be folded with drg operating rod for driving a switch 343.

So, before making trac. A walking, in advance operating handle 313 is operated and is made air compressor 312 action, if the operator depresses brake pedal 338 and operates this trac. A in walking, then the rotating operation power of this brake pedal 338 is delivered to boss portion 339 → drg movement arm 342 → drg operating rod for driving a switch 343 → brake service bar 198, walking that can drg brake portion 191 is with drg 192, and the rotating operation power of brake pedal 338 is delivered to boss portion 339 → transmission arm 341 → pipe link 337 → valve and opens and closes lever 336, valve 334 action that is opened.

The result, pressurized air is sent to the first air pipe arrangement, 332 → gas tank, 327 → the second air pipe arrangements, 333 → valve, 334 → the 3rd air pipe arrangements, 335 → power-absorption fan mechanism 311 from air compressor 312, by the pair of right and left rear wheel 306,306 of these power-absorption fan mechanism 311 drg brake setting on trailer B.

Thereby by depressing the brake pedal 338 of operation trac. A, trac. A also can brake the trailer B that is connected in its rear originally by drg, can improve the safety in the walking.

Next, primary mover portion 2 and the structure of power-transfer clutch portion 3 with change speed gear box portion 4 with regard to above-mentioned trac. A describe particularly in following order.

For primary mover portion 2, as shown in fig. 1, on frame 1, carry driving engine 15 etc., open and close by car bonnet 16 and cover this driving engine 15 etc. freely.

For power-transfer clutch portion 3, as shown in Fig. 2～Fig. 4, in clutch case 17 rotation be supported on freely front and back upwardly extending in outside double drive axis body 18, in this outside double drive axis body 18 by in front and back upwardly extending inboard axle drive shaft 19, formed with the barrel-contoured outside axle drive shaft 20 that rotates the periphery that is matched with this inboard axle drive shaft 19 freely.

And, the base end part (leading section) of one side's inboard axle drive shaft 19 is connected in above-mentioned driving engine 15 with power-transfer clutch 21 via walking, and top ends (rearward end) that should inboard axle drive shaft 19 is connected in aftermentioned running gear transmission device 51, and, the base end part (leading section) of the opposing party's outside axle drive shaft 20 is connected in above-mentioned driving engine 15 with power-transfer clutch 22 via PTO, and the top ends of this outside axle drive shaft 20 (rearward end) is connected in PTO described later system transmission device 52.

Here, in the end edge portion of clutch case 17, loading and unloading are connecting the front-end edge portion of the main gearshift case 53 of aftermentioned change speed gear box portion 4 freely, on the bearing 24 of above-mentioned interior outside double drive axis body 18 with the hinged front portion in being configured in clutch case 17 of top ends, on the other hand, rearward end is hinged on the bearing 25 of the front portion that is configured in main gearshift case 53.

And, in the inner peripheral portion of the rear end of clutch case 17, be formed on the rear wall 27 that central portion has peristome 26, to insert in the logical peristomes 26 and be installed on this rear wall 27 at the upwardly extending tubular supporter in front and back 28, by this tubular supporter 28 support above-mentioned in the middle part outer peripheral face of outside double drive axis body 18.

And, tubular supporter 28 necking down shape ground form the anterior 28a that is positioned at clutch case 17, on the other hand, hole enlargement shape ground forms the rear portion 28b that is positioned at main gearshift case 53, on the outer peripheral face of this rear portion 28b, form mounting flange sheet 28c, make this mounting flange sheet 28c be contacted with the back of the rear wall 27 of clutch case 17 from the rear, and install by installing with bolt 29.

In addition, inboard axle drive shaft 19 is divided into the front portion and cuts apart drive axle segments 30 and cut apart drive axle segments 31 with the rear portion and form, and be connected two division driving shaft parts 30,31 outside in the side drive axle 20 each other, drive axle segments 30 and rear portion are cut apart in the front portion cut apart near the connecting portion that the split position (position is connected) of drive axle segments 31 is disposed at clutch case 17 and main gearshift case 53, just be disposed in the rear portion 28b of tubular supporter 28.

And the top ends of drive axle segments 30 is cut apart in the front portion and base end part sleeve that drive axle segments 31 is cut apart at the rear portion is chimeric and loading and unloading are connected freely.

That is to say, forwardly outstanding backward being provided with cooperates with prominent section 30a on the top end face of division driving shaft part 30, on the other hand, cut apart at the rear portion and form base end side on the cardinal extremity face of drive axle segments 31 and cooperate and use recess 31a, above-mentioned cooperation is embedded in this base end side with prominent section 30a sleeve to be cooperated with among the recess 31a, and forwardly the spline 30b that forms on the top ends outer peripheral face of division driving shaft part 30, with cut apart on the spline 31b that forms on the base end part outer peripheral face of drive axle segments 31 at the rear portion, spline fitted is at the axis tubular connector 32 of direction forwards, backwards.

Outside axle drive shaft 20 forms anterior 20a along the outer peripheral face minor diameter ground of inboard axle drive shaft 19, on the other hand, form rear portion 20b along the outer peripheral face major diameter of above-mentioned tubular connector 32 ground, between the inner peripheral surface of the rear portion 28b of the outer peripheral face of this rear portion 20b and tubular supporter 28, be folded with bearing 33,34.

And, the setting that extends back from the rear end of tubular supporter 28 of the top ends of outside axle drive shaft 20, integrally formed PTO driven wheel 20c on outer peripheral face.The 35th, PTO driven wheel backup bearing.

So, form the front portion and cut apart drive axle segments 30 and cut apart drive axle segments 31 because inboard axle drive shaft 19 cut apart with the rear portion, and two division driving shaft parts 30 outside are connected in the side drive axle 20,31, therefore, with prior art, just the top ends of inboard axle drive shaft is extended the rear position of the top ends that is set to outside axle drive shaft, form the state of the base end part that butts up against PTO system input shaft and the prior art that is connected is compared via barrel-contoured plunging joint on same axis, on fore-and-aft direction, connect clutch case 17 and main gearshift case 53, even also can eliminate the main case 53 elongated such problem on fore-and-aft direction of shifting gears in interior outside double drive axis body 18 being inserted logical these clutch casees 17 and main gearshift case 53 time.

And, the assembling operation when clutch case 17 and main gearshift case 53 are connected as external member (assembly), perhaps remove connection and the maintenance activity that carries out etc. becomes easy.

And, because drive axle segments 30 and rear portion are cut apart in the front portion of inboard axle drive shaft 19 to be cut apart near the connecting portion that the split position of drive axle segments 31 is disposed at clutch case 17 and main gearshift case 53, so, main gearshift case 53 is shortened on fore-and-aft direction, can realize the densification of body, and the module units of main gearshift case 53 is shortened on fore-and-aft direction, can realize the reduction of the logistics cost of module units, as a result, a plurality of unit of can once stocking up after outwards ordering goods.

At this moment, because the cooperation that will be forwardly forms on the top ends of division driving shaft part 30 with prominent section 30a sleeve be embedded in the rear portion cut apart the base end side that forms on the base end part of drive axle segments 31 cooperate with recess 31a in and load and unload and be connected freely, so the front portion that can assemble accurately is connected cuts apart formation is cut apart drive axle segments 30 and is cut apart drive axle segments 31 with the rear portion.

In addition, front and back cooperate walking to move body 36 with tubular to outer peripheral face sliding freely that cross over outside axle drive shaft 20 with the outer peripheral face of tubular supporter 28, in this walking with the rear portion of tubular action body 36 base end part of walking that be connected with power-transfer clutch arm of action 37, on the other hand, in the front-end edge portion of this walking, be provided with power-transfer clutch effect sheet 36a, facing to slave arm 21a approaching configuration this power-transfer clutch effect sheet 36a of walking with power-transfer clutch 21 with tubular action body 36.The 38th, the bar fulcrum.

So,, then walk and move body 36 to front slide with tubular if rotating operation is walked with power-transfer clutch arm of action 37, power-transfer clutch effect sheet 36a pushing slave arm 21a, this slave arm 21a rotates and walks and carry out the power cut action with power-transfer clutch 21.

In addition, walking with the outer peripheral face of tubular action body 36 on before and after cooperate PTO with tubular action body 39 sliding freely, at this PTO with the rear portion of tubular action body 39 base end part of PTO that be connected with power-transfer clutch arm of action 40, on the other hand, this PTO is provided with power-transfer clutch effect sheet 39a with the front-end edge portion of tubular action body 39, facing to slave arm 22a approaching configuration this power-transfer clutch effect sheet 39a of PTO with power-transfer clutch 22.The 41st, the bar fulcrum.

So, if rotating operation PTO with power-transfer clutch arm of action 40, then to front slide, power-transfer clutch effect sheet 39a pushing slave arm 22a, this slave arm 22a rotate PTO and PTO carries out power cut with power-transfer clutch 22 and moves with tubular action body 39.

For change speed gear box portion 4, as shown in Fig. 2 and Fig. 3, in the change speed gear box 45 that tubular ground forms extending along fore-and-aft direction, dispose main gearshift 46 and secondary gearshift 47 and box of tricks 48 backward successively in the past, and (creep) gearshift portion 49 of creeping is installed in loading and unloading freely in this change speed gear box 45, the gearshift 50 of creeping that is arranged in this gearshift portion 49 of creeping is connected in above-mentioned secondary gearshift 47, form main gearshift, secondary gearshift, keep off the running gear transmission device 51 that is carried out with creeping, in addition, between above-mentioned outside axle drive shaft 20 and PTO gearshift described later portion 6, be folded with PTO system transmission device 52.

And, change speed gear box 45 is divided into two and forms main gearshift case 53 that is built-in with main gearshift 46 and the box main body 54 that is built-in with secondary gearshift 47 and box of tricks 48, main gearshift case 53 is connected in the loading and unloading of front-end edge portion the end edge portion of above-mentioned clutch case 17 freely by tie bolt 56a, and box main body 54 is loaded and unloaded the end edge portion that is connected in main gearshift case 53 freely via supporting walls organizator 55 by tie bolt 56b.

Therefore, below, the case 53 of the main gearshift of explanation in this order, main gearshift 46, box main body 54, secondary gearshift 47, and the formation of box of tricks 48.

(main gearshift case)

For main gearshift case 53, as shown in Fig. 5 and Fig. 6, form upwardly extending tubular in front and back, forwardly form inner support wall 57 on the inner peripheral surface, between this inner support wall 57 and above-mentioned supporting walls organizator 55, be folded with main gearshift 46, carry out the advance gear shift operation and the operation of reversing gear of many retainings (5 retainings in the present embodiment) by this main gearshift 46.

(main gearshift)

For main gearshift 46, as shown in Fig. 5 and Fig. 6, central portion in inner support wall 57 supports the top ends (rearward end) that drive axle segments 31 is cut apart at the rear portion via above-mentioned bearing 25, cut apart integrally formed the 5th retaining gear 31c on the leading section outer peripheral face of drive axle segments 31 at the rear portion at the rear that is positioned at this bearing 25, and cut apart at this rear portion and form tip side on the aft end face of drive axle segments 31 and cooperate and use recess 31d, in cooperating with recess 31d, this tip side cooperates freely from the outstanding forward cooperation that forms of the cardinal extremity face (front end face) of upwardly extending main gearshift main shaft 58 with a prominent section 58a in front and back around its rotational, on the other hand, the top ends (rearward end) that will lead gearshift main shaft 58 via bearing 59 is supported in the central portion of supporting walls organizator 55 freely around its rotational.

And, on main gearshift main shaft 58, from the base end part side direction the top ends side successively on fore-and-aft direction devices spaced apart ground coaxially and around the outer peripheral face rotation of main gearshift main shaft 58 the four the three the two the first retaining gear 60,61,62,63 and the reverse gears 64 are installed freely.

In addition, on main gearshift main shaft 58, the 3rd gearshift body 65 that is disposed between the 5th retaining gear 31c and the 4th retaining gear 60 is installed, be disposed at the second gearshift body 66 between the 3rd retaining gear 61 and the second retaining gear 62, and be disposed at the first gearshift body 67 between the first retaining gear 63 and the reverse gear 64.

Here, each body 65,66,67 of shifting gears possesses and is connected in the axle side of main gearshift main shaft 58 be connected sheet 65a, 66a, 67a, be connected in the front and back gear side of each gear of front and back adjacency be connected sheet 65b, 65c, 66b, 66c, 67b, 67c, and be connected between sheet 65b, 65c, 66b, 66c, 67b, the 67c at axis direction sliding block joint sheet 65d, 66d, the 67d of spline fitted sliding freely in be connected sheet 65a, 66a, 67a and each gear side of each side.

And, each sliding block joint sheet 65d, 66d, 67d can slide to being positioned at be connected center position on sheet 65a, 66a, the 67a of each side, slip is connected between sheet 65b, 66b, the 67b and both the place ahead slip drive range of being connected in be connected sheet 65a, 66a, 67a and front gear side of each side, and slides and be connected that sheet 65a, 66a, 67a and backgear side are connected between sheet 65c, 66c, the 67c and some in both the rear slip drive range of being connected in each side.

In addition, between inner support wall 57 and above-mentioned supporting walls organizator 55, be supported on the upwardly extending main gearshift countershaft 70 in front and back via front and rear part bearing 68,69, on the outer peripheral face of this master gearshift countershaft 70 coaxially and rotation install the one two three freely and keep off gear mass 71,72,73.

And, integrally formed front gear 71a and back gear 71b on the first retaining gear mass 71, respectively with the 5th retaining gear 31c and 60 engagements of the second retaining gear, in addition, integrally formed front gear 72a and back gear 72b on the second retaining gear mass 72, respectively with the 3rd retaining gear 61 and 62 engagements of the second retaining gear, in addition, integrally formed front gear 73a is engaged in the first retaining gear 63 on the 3rd retaining gear mass 73, on the other hand, the 3rd retaining on the gear mass 73 integrally formed back gear 73b via hinged in supporting walls organizator 55 counter gear 74 and be engaged in reverse gear 64.The 75th, the counter gear fulcrum, 76 are provided in a side of the axle bearing body in the main gearshift case 53.

And, between inner support wall 57 and above-mentioned supporting walls organizator 55, as shown in Fig. 5～Fig. 7, with upwardly extending slide mass fulcrum 80 front and back, front and back be set up in sliding freely above-mentioned main gearshift main shaft 58 directly over the position, and lever universal driving shaft that fore-and-aft direction is extended 81 is parallel and front and back are set up in the right side location of above-mentioned slide mass fulcrum 80 sliding freely, the front portion that the top ends of the outstanding joint fastener 82 that is provided with to the left is matched be located at slide mass fulcrum 80 be engaged sheet 83, on the other hand, the rearward end of the lever universal driving shaft 81 in extension is set to housing body 54 is provided with effect and bears sheet 84, makes the effect sheet 85a that forms on the bottom of main gear level 85 be engaged in this effect and bears sheet 84.The 97th, the sheet mount pin is born in effect.

And, as shown in Figure 2, the 54c of ceiling portion of housing body 54 is provided with swing supporter 86, as shown in Figure 6, will be hinged in the swing supporting blade 87 that is located on this swing supporter 86 in the bottom of the upwardly extending main gear level 85 of upper and lower, make this main gear level 85 become on direction all around swinging operation freely, to insert in the lower end of the effect sheet 85a that forms on the bottom of this main gear level 85 and lead in the lever inserting hole 88 that on the 54c of ceiling portion, forms, and make it to be matched with above-mentioned effect and bear sheet 84.The 89th, lever neutrality resets and uses spring.

In addition, as shown in Fig. 5 and Fig. 7, at the middle part of slide mass fulcrum 80, have side peristome 90 and be engaged in the back view slip restriction body 91 that forms the C font, and from slide mass fulcrum 80 on radial direction by making slip effect sheet 92 outstanding the side peristome 90.

And, on slide mass fulcrum 80, from after the one the second three slide masses 95,94,93 are installed on axis direction forward successively sliding freely, and the 3rd slide mass 93 is disposed at the place ahead of the restriction body 91 that slides, on the other hand, the one the second slide masses 95,94 are disposed at the rear of the restriction body 91 that slides.

And, each slide mass 95,94,93 possesses boss portion 95a, 94a, the 93a that is matched with slide mass fulcrum 80 sliding freely, from each boss portion 95a, 94a, 93a to the left and right the below extend and form dial retaining fork (shift fork) 95b, 94b, 93b, and extend and sheet 95c, 94c, 93c are born in the slip effect that forms to the restriction body 91 that slides from each boss portion 95a, 94a, 93a.

And each group retaining fork 95b, the 94b of the one the second three slide masses 95,94,93,93b are connected respectively in sliding block joint sheet 67d, 66d, the 65d of above-mentioned the one the second three gearshift bodies 67,66,65.

In addition, the one the second three slide masses 95,94, sheet 95c is born in each slip effect of 93,94c, 93c rotates on the direction that the slip effect sheet 92 and the restriction body 91 that slides are being wanted around rotational by making slide mass fulcrum 80, thereby sheet is born in a slip effect that slip effect sheet 92 is matched with want, making this slip effect bear sheet links and slides in the front and back of slide mass fulcrum 80 and carry out sliding action, and make the outstanding margining tablet 91a that is provided with on the restriction body 91 that slides, at least one side of 91b is engaged in other two slip effects and bears sheet, and two slip effects are born sheet and can be limited the sliding action that links and slide in the front and back of slide mass fulcrum 80.The 96th, be used for the action of axis direction of limit slippage restriction body 91 and the restriction that vertically is provided with up and down at the 54c of ceiling portion of housing body 54 with prominent section.

Main gearshift 46 is as mentioned above and constitutes, and following, retaining operation (the first retaining operation～the five retaining operation and the operation of reversing gear) that should main gearshift 46 describes.

(the first retaining operation)

Operation rotates backward under the state that main gear level 85 approximate vertical are erected, sheet 84 → lever universal driving shaft 81 → joint fastener 82 → be engaged sheet 83 → slide mass fulcrum 80 is born in the effect sheet 85a → effect that its rotating operation power is delivered to form on the bottom of main gear level 85, makes this slide mass fulcrum 80 to front slide.

So, the sliding force forward of slide mass fulcrum 80 is delivered to the slip effect of slip effect sheet 92 → the first slide masses 95 and bears sheet 95c → boss portion 95a → group retaining fork 95b, being connected slides into slip drive range in the place ahead in the sliding block joint sheet 67d of the first gearshift body 67 of this group retaining fork 95b from center position, and axle side sheet 67a and the front gear side sheet 67b that is connected that is connected becomes the state that is connected.

The result, be delivered to the power of inboard axle drive shaft 19 from driving engine 15, be delivered to the front portion and cut apart drive axle segments 30 → rear portion and cut apart the front gear side of the front gear 73a of the front gear 71a of drive axle segments 31 → 5th retaining gear 31c → 3rd retaining gear mass 71 → master gearshift countershaft 70 → the first retaining gear masses 73 → first retaining gear, 63 → the first gearshift bodies 67 sheet 67b → sliding block joint sheet 67d → axle side sheet 67a → master main shaft 58 of shifting gears that is connected that is connected, become first and keep off.

At this moment, slip effect sheet 92 is engaged in the slip effect of first slide mass 95 and bears sheet 95c, and sheet 94c, 93c are born in the margining tablet 91a of restriction body 91 that slides, the slip effect that 91b is engaged in the two or three slide mass 94,93, and the action of two slide masses 94,93 is restricted.

(the second retaining operation)

Rotating operation master gear level 85 to the right, making the effect sheet 85a that forms on the bottom of main gear level 85 is that fulcrum rotates to the left with swing supporting blade 87, make the effect of being delivered to of its turning effort bear sheet 84 → lever universal driving shaft 81 → joint fastener 82 → be engaged sheet 83 → slide mass fulcrum 80, make this slide mass fulcrum 80, in the back view of Fig. 7, clockwise rotate, and also clockwise rotate via slip effect sheet 92 slip restriction bodies 91.

Then, further the rotating operation main gear level 85 of rotating operation to the right forward slides backward slide mass fulcrum 80.

So, the sliding force backward of slide mass fulcrum 80 is delivered to the slip effect of slip effect sheet 92 → the second slide masses 94 and bears sheet 94c → boss portion 94a → group retaining fork 94b, make the sliding block joint sheet 66d that is connected in the second gearshift body 66 of this group retaining fork 94b slide into rear slip drive range from center position, axle side sheet 66a and the backgear side sheet 66c that is connected that is connected becomes the state that is connected.

The result, be delivered to the power of inboard axle drive shaft 19 from driving engine 15, be delivered to the front portion and cut apart drive axle segments 30 → rear portion and cut apart the backgear side of the back gear 72b of the front gear 71a of drive axle segments 31 → 5th retaining gear 31c → 3rd retaining gear mass 71 → master gearshift countershaft 70 → the second retaining gear masses 72 → second retaining gear, 62 → the second gearshift bodies 66 sheet 66c → sliding block joint sheet 66d → axle side sheet 66a → master main shaft 58 of shifting gears that is connected that is connected, become second and keep off.

At this moment, slip effect sheet 92 is engaged in the slip effect of second slide mass 94 and bears sheet 94c, and the margining tablet 91b of the restriction body 91 that slides is engaged in the slip effect of the one or three slide mass 95,93 and bears sheet 95c, 93c, and the action of two slide masses 95,93 is restricted.

(the 3rd retaining operation)

The rotating operation and the main gear level 85 of operation that rotates backward make slide mass fulcrum 80 to front slide to the right.

So, the sliding force forward of slide mass fulcrum 80 is delivered to the slip effect of slip effect sheet 92 → the second slide masses 94 and bears sheet 94c → boss portion 94a → group retaining fork 94b, make the sliding block joint sheet 66d that is connected in the second gearshift body 66 of this group retaining fork 94b slide into the place ahead slip drive range from center position, axle side sheet 66a and the front gear side sheet 66b that is connected that is connected becomes the state that is connected.

The result, be delivered to the power of inboard axle drive shaft 19 from driving engine 15, be delivered to the front portion and cut apart drive axle segments 30 → rear portion and cut apart the front gear side that front gear 72a → 3rd retaining gear 61 → the second is shifted gears bodies 66 of the front gear 71a of drive axle segments 31 → 5th retaining gear 31c → first retaining gear mass 71 → master gearshift countershaft 70 → the second retaining gear masses 72 sheet 66b → sliding block joint sheet 66d → axle side sheet 66a → master main shaft 58 of shifting gears that is connected that is connected, become the 3rd retaining.

At this moment, slip effect sheet 92 is engaged in the slip effect of second slide mass 94 and bears sheet 94c, and the margining tablet 91b of the restriction body 91 that slides is engaged in the slip effect of the one or three slide mass 95,93 and bears sheet 95c, 93c, and the action of two slide masses 95,93 is restricted.

(the 4th retaining operation)

To left rotating operation master gear level 85, with swing supporting blade 87 is that fulcrum rotates the effect sheet 85a that forms to the right on the bottom of main gear level 85, sheet 84 → lever universal driving shaft 81 → joint fastener 82 → be engaged sheet 83 → slide mass fulcrum 80 is born in the effect of being delivered to of its turning effort, make this slide mass fulcrum 80 in the back view of Fig. 9, rotate counterclockwise, and the restriction body 91 that slides is also rotated counterclockwise via slip effect sheet 92.

Then, further the rotating operation main gear level 85 of rotating operation to the right forward slides backward slide mass fulcrum 80.

So, the sliding force backward of slide mass fulcrum 80 is delivered to the slip effect of slip effect sheet 92 → the 3rd slide masses 93 and bears sheet 93c → boss portion 93a → group retaining fork 93b, make the sliding block joint sheet 65d that is connected in the 3rd gearshift body 65 of this group retaining fork 93b slide into rear slip drive range from center position, axle side sheet 65a and the backgear side sheet 65c that is connected that is connected becomes the state that is connected.

The result, be delivered to the power of inboard axle drive shaft 19 from driving engine 15, be delivered to the front portion and cut apart drive axle segments 30 → rear portion and cut apart the backgear side of the back gear 71b of drive axle segments 31 → 5th retaining gear 31c → 3rd retaining gear mass 71 → 4th retaining gear 62 → 3rd gearshift body 65 sheet 65c → sliding block joint sheet 65d → axle side sheet 65a → master main shaft 58 of shifting gears that is connected that is connected, become the 4th retaining.

At this moment, slip effect sheet 92 is engaged in the slip effect of the 3rd slide mass 93 and bears sheet 93c, and the margining tablet 91a of the restriction body 91 that slides is incorporated into the slip effect of the one the second slide masses 95,94 and bears sheet 95c, 94c, and the action of two slide masses 95,94 is restricted.

(the 5th retaining operation)

The rotating operation and the main gear level 85 of operation that rotates backward make slide mass fulcrum 80 to front slide to the left.

So, the sliding force forward of slide mass fulcrum 80 is delivered to the slip effect of slip effect sheet 92 → the 3rd slide masses 95 and bears sheet 95c → boss portion 95a → group retaining fork 95b, make the sliding block joint sheet 67d that is connected in the 3rd gearshift body 67 of this group retaining fork 95b slide into the place ahead slip drive range from center position, axle side sheet 67a and the front gear side sheet 67b that is connected that is connected becomes the state that is connected.

The result, be delivered to the power of inboard axle drive shaft 19 from driving engine 15, be delivered to the front portion and cut apart drive axle segments 30 → rear portion and cut apart the front gear side of drive axle segments 31 → 5th retaining gear 31c → 3rd retaining gear mass 67 sheet 65b → sliding block joint sheet 67d → axle side sheet 65a → master main shaft 58 of shifting gears that is connected that is connected, become the 5th retaining.

At this moment, slip effect sheet 92 is engaged in the slip effect of the 3rd slide mass 93 and bears sheet 93c, and the margining tablet 91a of the restriction body 91 that slides is engaged in the slip effect of the one the second slide masses 95,94 and bears sheet 95c, 94c, and the action of two slide masses 95,94 is restricted.

(operation of reversing gear)

Under the state that generally perpendicularly erects, operate main gear level 85 forward, sheet 84 → lever universal driving shaft 81 → joint fastener 82 → be engaged sheet 83 → slide mass fulcrum 80 is born in the effect sheet 85a → effect that its rotating operation power is delivered to form on the bottom of main gear level 85, and this slide mass fulcrum 80 is slided backward.

So, the power of sliding backward of slide mass fulcrum 80 is delivered to the slip effect of slip effect sheet 92 → the first slide masses 95 and bears sheet 95c → boss portion 95a → group retaining fork 95b, make the sliding block joint sheet 67d that is connected in the 3rd gearshift body 67 of this group retaining fork 95b slide into rear slip drive range from center position, axle side sheet 67a and the backgear side sheet 67c that is connected that is connected becomes the state that is connected.

The result, be delivered to the power of inboard axle drive shaft 19 from driving engine 15, being delivered to the front portion cuts apart drive axle segments 30 → rear portion and cuts apart backgear side that back gear 73b → counter gear 74 → reverse gear 64 → the 3rd of the front gear 71a of drive axle segments 31 → 5th retaining gear 31c → 3rd retaining gear mass 71 → master gearshift countershaft 70 → the first retaining gear masses 73 shifts gears bodies 67 sheet 67c → sliding block joint sheet 67d → axle side sheet 67a → master main shaft 58 of shifting gears that is connected that is connected, these main gearshift main shaft 58 counter-rotatings become and reverse gear.

At this moment, slip effect sheet 92 is incorporated into the slip effect of first slide mass 95 and bears sheet 95c, and sheet 94c, 93c are born in the margining tablet 91a of restriction body 91 that slides, the slip effect that 91b is engaged in the two or three slide mass 94,93, and the action of two slide masses 94,93 is restricted.

(housing body)

For housing body 54, as shown in Fig. 2, Figure 10 and Figure 13, form upwardly extending tubular in front and back, on the inner peripheral surface middle part, form axle bearing wall 100, in this housing body 54, the secondary gearshift 47 of configuration on the anterior position of above-mentioned axle bearing wall 100, and on the rear position of this axle bearing wall 100, disposing box of tricks.

And, on the housing body 54 of the anterior position that is positioned at axle bearing wall 100, on right side wall 54b, form peristome 101, via these peristome 101 loading and unloading the gearshift portion 49 of creeping described later is installed freely, and on the 54d of bottom, form peristome 102, via this peristome 102 front vehicle wheel described later is installed and drives with power taking-up portion 103, these gearshift portions 49 of creeping drive with front vehicle wheel and are connected respectively in secondary gearshift 47 with power taking-up portion 103.

In addition, on the housing body 54 that is positioned at axle bearing wall 100 rears, as shown in Figure 11, on left and right sides sidewall 54a, 54b, form peristome 104,104 respectively, be connected with rear axle casing 8,8 via each peristome 104,104, insert logical in each rear axle casing 8,8 and rotate and be supported on the upwardly extending back axle 105,105 of right and left freely, each back axle 105,105 is connected in box of tricks 48.

And, on the housing body 54 that is positioned at axle bearing wall 100 rears, as shown in Figure 10, in ceiling portion, form the peristome 106 of maintenance usefulness, cover this peristome 106 by loading and unloading lid 107 freely, on the rear portion of this lid 107, upwards form lift arm supporter 108 with bloating, on the top of this lift arm supporter 108, insert logical and rotate freely the axis of support lift arm fulcrum 109 of direction to the left and right, the base end part of pair of right and left lift arm 110,110 is installed on the right and left end of this lift arm fulcrum 109.

And, as shown in Figure 10, PTO gearshift portion 6 is installed on the peristome 111 that forms on the rear end of housing body 54.

In addition, as shown in Fig. 2 and Figure 10, on the rear lower of the left and right sides of housing body 54 sidewall, the outstanding laterally lower link connecting pin 112,112 that is provided with rotates the leading section of pair of right and left lower link 13,13 and to be supported in housing body 54 freely via lower link connecting pin 112,112.

(secondary gearshift)

For secondary gearshift 47, as shown in Figure 10, via sun and planet gear 115 pair gearshift axle 116 is connected and constitutes in the top ends (rearward end) of above-mentioned main gearshift main shaft 58, the top ends of main gearshift main shaft 58 extends back and becomes the sun gear 117 of a part that constitutes sun and planet gear 115, on the other hand, secondary gearshift axle 116 be disposed at main gearshift main shaft 58 same axis on, and middle part is supported in be located at the axle bearing body 118 in the housing body 54 via bearing 119, and, make top ends (rearward end) be supported in above-mentioned axle bearing wall 100 via bearing 120.

Sun and planet gear 115, on above-mentioned supporting walls organizator 55, by axis forwards, backwards the hold-down bolt 123 of direction a pair of inner gear supporter 121 in front and back that forms ring-type and be disposed at the periphery of sun gear 117 is installed, 122, at two inner gear supporters 121,122 2 are supported inner gear (inner gear) 124, the a plurality of planetary wheels 125 of devices spaced apart ground configuration on the circumferencial direction of this inner gear 124, and make each planetary wheel 125 be engaged in inner gear 124 and sun gear 117 both sides, on the other hand, the a pair of inner gear supporter 121 in front and back, between 122 inner peripheral portion via front and back pair of bearings 126,127 install planetary gear carriers 128, be connected a plurality of planetary wheels 125 integratedly and constitute on this planetary gear carrier 128.

And, planetary gear carrier 128, with end edge portion to the bearing 127 rear extension settings of rear side and form barrel-contoured gear shape in blocks 129, on the inner peripheral surface of this gear shape in blocks 129, form internal tooth 130, and on the outer peripheral face of this gear shape in blocks 129, form external tooth 131 as the driven wheel of creeping.

And, between the outer peripheral face of the base end part (leading section) 114 of the outer peripheral face of sun gear 117 and secondary gearshift axle 116, on axis direction, move the barrel-contoured traveling gear supporter 132 of spline fitted freely, integrally formed anterior traveling gear 133 on the anterior outer peripheral face of this traveling gear supporter 132, and on the outer peripheral face of rear portion integrally formed rear portion traveling gear 134.

And, as shown in Figure 12 and Figure 13, right side in housing body 54, the configuration axis is the fork fulcrum 135 of direction forwards, backwards, the base end part 137 of dialling retaining fork 136 is installed before and after on this fork fulcrum 135 sliding freely, and makes the top ends 138 of this group retaining fork 136 be engaged in traveling gear supporter 132.

In addition, on the lid 139 of a part that constitutes the gearshift portion 49 of creeping described later, form the axis boss portion 140 of direction to the left and right, in this boss portion 140, insert through rod fulcrum 141, the base end part of secondary gear level 142 is installed on the outboard end of this bar fulcrum 141, and the base end part of transmission arm 143 is installed on the medial end of this bar fulcrum 141, the base end part 137 of above-mentioned group of retaining fork 136 is connected in the top ends of this transmission arm 143 via pad 144.

So, by with secondary gear level 142 rotating operation on fore-and-aft direction, and make traveling gear supporter 132 action of on fore-and-aft direction, shifting gears, carry out secondary gear shift operation.

That is to say, the secondary gear level 142 if rotate backward, then rotate forward via bar fulcrum 141 transmission arms 143, the retaining of dialling that is connected in the top ends of this transmission arm 143 via pad (hat dish (coma)) 144 pitches 136 to front slide, and the traveling gear supporter 132 that is engaged in this group retaining fork 136 moves forward.

At this moment, traveling gear supporter 132 is moved under the state between the outer peripheral face of the base end part (leading section) 114 of the outer peripheral face of crossing over sun gear 117 and secondary gearshift axle 116, via this traveling gear supporter 132, sun gear 117 becomes the state (main gearshift main shaft 58 and secondary gearshift axle 116 states that directly combine) that is connected with secondary gearshift axle 116.

Thereby at this place, shift position, power is delivered to secondary gearshift axle 116 from integrally formed sun gear 117 on main gearshift main shaft 58 via traveling gear supporter 132.

In addition, if secondary gear level 142 is rotated forward, then via bar fulcrum 114, transmission arm 143 rotates backward, the retaining fork 136 of dialling that is connected in the top ends of this transmission arm 143 via pad 144 slides backward, and the traveling gear supporter 132 that is engaged in this group retaining fork 136 moves backward.

And, traveling gear supporter 132 breaks away from from the outer peripheral face of sun gear 117, move on the outer peripheral face of base end part (leading section) 114 of secondary gearshift axle 116, and anterior traveling gear 133 is engaged in the internal tooth 130 that forms on the inner peripheral surface of gear shape in blocks 129.

Thereby, at this place, shift position, in the turning effort of leading sun gear 117 integrally formed on the gearshift main shaft 58, be delivered to the base end part 114 of planetary wheel 125 → planetary gear carrier 128 → anterior traveling gear 133 → traveling gear supporter 132 of internal tooth 130 → traveling gear supporter 132 of integrally formed gear shape in blocks 129 on this planetary gear carrier 128 → pair gearshift axle 116 that is engaged in this sun gear 117.

At this moment, the power that is decelerated via sun and planet gear 115 is delivered to secondary gearshift axle 116 from main gearshift main shaft 58, carries out the pair gearshift.

In addition, in the present embodiment, if secondary gear level 142 is further rotated forward, then by the gearshift portion 49 of the creeping retaining (Ultra-Low Speed retaining) of creeping.

Here, gearshift portion 49 describes to creeping, this gearshift portion 49 of creeping, as shown in Figure 10, Figure 12 and Figure 13, on the peristome 101 that forms on the right side wall of above-mentioned housing body 54, cover lid 139 freely by hold-down bolt 145 loading and unloading, and loading and unloading installation is freely creeped gearshift 146 and is constituted on the inner face of this lid 139.

And, the gearshift 146 of creeping, the axis gear fulcrum 149 of direction is forwards, backwards set up in loading and unloading freely giving prominence to 147,148 of a pair of axle bearing sheets in front and back on the inner face that is arranged at lid 139, rotate and be installed on this gear fulcrum 149 freely via the bearing 150 retaining gear mass 151 of will creeping, constitute at the output gear 153 of integrally formed large diameter input gear 152 in the front portion and the rear portion of this retaining gear mass 151 of creeping and minor diameter.

And, input gear 152 loading and unloading are engaged in the creep external tooth 131 of driven wheel of the conduct that forms freely on the outer peripheral face of gear shape in blocks 129, and output gear 153 loading and unloading are engaged in the transmission gear 155 of creeping that is installed on secondary gearshift axle 116 via bearing 154 rotations freely freely, on the front of this transmission gear 155 of creeping, be formed on rear portion traveling gear 134 integrally formed on the rear portion outer peripheral face of traveling gear supporter 132 and insert also ingear insertion engaging gear 156.

So, if secondary gear level 142 is rotated forward to greatest extent, then rotate backward via bar fulcrum 141 transmission arms 143, the retaining fork 136 of dialling that is connected in the top ends of this transmission arm 143 via pad 144 slides backward, and the traveling gear supporter 132 that is engaged in this group retaining fork 136 moves to greatest extent backward.

And, traveling gear supporter 132 breaks away from from the outer peripheral face of sun gear 117, move on the outer peripheral face of base end part (leading section) 114 of secondary gearshift axle 116, and rear portion traveling gear 134 inserts and is engaged in the insertion engaging gear 156 that forms on the front of transmission gear 155 of creeping.

Thereby, at this place, shift position, the turning effort of integrally formed sun gear 117 on main gearshift main shaft 58 is delivered to planetary wheel 125 → planetary gear carrier 128 of being engaged in this sun gear 117 → at a shift gears base end part 114 of spools 116 of integrally formed rear portion traveling gear 134 → traveling gear supporter 132 → pair of the output gear 153 → transmission gear 155 of creeping → the insertions engaging gear 156 of the input gear 152 → retaining gear mass 151 of creeping of the external tooth 131 → retaining gear mass 151 of creeping of gear shape integrally formed on this planetary gear carrier 128 in blocks 129 → on the outer peripheral face of the rear portion of traveling gear supporter 132.

At this moment, the power that slows down into Ultra-Low Speed via sun and planet gear 115 with creeping gearshift 146 is delivered to secondary gearshift axle 116 from main gearshift main shaft 58, becomes the retaining of creeping.

Here, because on the external tooth 131 of the gear shape in blocks 129 that is integrally formed in planetary gear carrier 128 as the driven wheel of creeping, the input gear 152 of the retaining gear mass 151 of creeping is being meshed in loading and unloading freely, therefore, the gearshift 146 of creeping can be disposed at compactly the circumference of sun and planet gear 115, can avoid the lengthening of change speed gear box portion 4.

And, because also can on the axis direction of sun and planet gear 115, creep the retaining operation point-blank, therefore can realize the simplification of gear shift operation mechanism.

And, because installation is creeped gearshift 146 and is constituted the gearshift portion 49 of creeping on lid 139, and this gearshift portion 49 of creeping is installed on and covers the peristome 101 that forms with lid 139 loading and unloading, freely so can make the assembleability of this gearshift portion 49 of creeping good on housing body 54.

And, when not needing to creep specification, by taking off from lid 139 under the state of the gearshift 146 of creeping, this lid 139 is installed on the peristome 101 of housing body 54, can become not have the specification of creeping from the specification change specification of creeping simply.

In addition, just passable as long as the gearshift 146 of will creeping is installed on lid 139 when needs are creeped specification, can easily have or not the specification of creeping to set.

Front vehicle wheel drives with power taking-up portion 103, as shown in Fig. 2 and Figure 10, taking-up portion case 160 is installed on the peristome 102 that forms on the bottom of housing body 54 by hold-down bolt 161, in this taking-up portion case 160, set up the axis front vehicle wheel axle drive shaft 164 of direction forwards, backwards via front and back pair of bearings 162,163, at the middle part of this front vehicle wheel axle drive shaft 164 input gear 165 is installed, between the output gear 166 at this input gear 165 and the rear portion that is installed on secondary gearshift axle 116, is pressed from both sides and establish the one the second intermediate gears 167,168 and constitute.

Here, first intermediate gear 167 rotates via bearing 170 and is installed on PTO described later system transmission shaft 169 freely, and second intermediate gear 168, gear fulcrum 173 is set up in a pair of gear supporting blade 171,172 in front and back that forms highlightedly in housing body 54, is installed on this gear fulcrum 173 freely via bearing 174 rotations.

And, output gear 166, first intermediate gear 167, second intermediate gear 168 and input gear 165 are in series meshed and be connected.

In addition, front vehicle wheel axle drive shaft 164 makes top ends 175 outstanding to the place ahead of taking-up portion case 160, and this top ends 175 is connected in the input shaft (not shown) that is located on the front bearing box via transmission shaft etc.

So, the turning effort of secondary gearshift axle 116 is delivered to output gear 166 → the first intermediate gears 167 → the second intermediate gears 168 → input gear 165 → front vehicle wheel axle drive shaft 164 → transmission shaft of being installed on this pair gearshift axle 116 etc. → input shaft → front axle → front vehicle wheel 7,7, carries out the four wheel drive walking.

In addition, in the present embodiment, input gear 165 spline fitted are in the middle part of front vehicle wheel axle drive shaft 164, can move to the position and releasing position engaged that are engaged in second intermediate gear 168, and carry out the move operation of this input gear 165 by move operation mechanism (not shown) from the outside of taking-up portion case 1 60.

So, if make input gear 165 be engaged in the move operation of second intermediate gear 168, then can carry out the four wheel drive walking as previously mentioned, on the other hand, remove the ingear move operation if make input gear 165 from second intermediate gear 168, then can carry out the only two-wheel drive walking of back-wheel drive, the blocked operation according to operating condition carries out four wheel drive walking and two-wheel drive walking carries out operation expeditiously.

(box of tricks)

For box of tricks 48, as shown in Figure 10 and Figure 11, be located between above-mentioned secondary gearshift axle 116 and the pair of right and left rear wheel 105,105, on the top ends (rearward end) of the pair gearshift axle 116 of the rear extension of axle bearing wall 100, form output bevel gear 180, on the other hand, back axle input gear 181,181 is installed on the base end part of each back axle 105,105, output is connected in each back axle input gear 181,181 via box of tricks 48 with bevel gear 180.

That is to say, for box of tricks 48, on the outer peripheral face of differential gear box 182, be installed with and be engaged in the big retarding gear 183 of above-mentioned output with bevel gear 180, on the other hand, in differential gear box 182, via a pair of little differential gear 185 before and after upwardly extending little differential gear fulcrum 184 rotations are installed with freely in front and back, 185, and via at the big differential gear fulcrum 186 of the upwardly extending pair of right and left of right and left, 186 are installed with the big differential gear 187 of pair of right and left, 187, make each big differential gear 187,187 are engaged in two little differential gears 185,185.

And, tubular at the left and right sides sidepiece that is integrally formed in differential gear box 182 is communicated with connecting strap 188, on 188, load and unload the pair of right and left tubular axle bearing body 189 of fitted shaft alignment left and right directions freely, 189 and become and to be communicated with connection, be communicated with connecting strap 188 by each tubular, in 188 and at each tubular axle bearing body 189, in 189, insert logical and support above-mentioned big differential gear fulcrum 186,186, from each big differential gear fulcrum 186,186 tubular axle bearing body 189, on 189 parts of giving prominence to, install and above-mentioned back axle input gear 181 respectively, 181 ingear transmission gears 190,190, and then, each big differential gear fulcrum 186,186 top ends, loading and unloading are connected in drg described later portion 191 freely, 191 walking drg 192,192.

So, be delivered to the turning effort of pair gearshift axle 116, be delivered to output bevel gear 180 → big retarding gear 183 → differential gear box 182 → little differential gear fulcrum 184 → each little differential gear 185,185 → each big differential gear 187,187 → each big differential gear 186,186 → each transmission gear 190,190 → each back axle input gear 181,181 → each back axle 105,105 → each rear wheel 9,9 of the top ends (rearward end) that is integrally formed in this pair gearshift axle 116.

In addition, pair of right and left tubular axle bearing body 189,189, be matched with the installation peristome 194,194 of left and right sides sidewall 54a, the 54b formation of housing body 54 from outer side, and installed freely by hold-down bolt 195,195 loading and unloading, differential gear box 182 loading and unloading are set up in 189,189 of two tubular axle bearing bodies freely.

And, each tubular axle bearing body 189,189, after taking off hold-down bolt 195,195, by pulling out with peristome 194,194 outside sides from installing, and can take off from housing body 54, at this moment, each big differential gear fulcrum 186,186 also can take off from differential gear box 182 pull-offs integratedly with each tubular axle bearing body 189,189.

Thereby loading and unloading are set up in the differential gear box 182 of 189,189 of two tubular axle bearing bodies freely, and after taking off each tubular axle bearing body 189,189, the peristome 106 of the maintenance usefulness that can form from the ceiling portion in housing body 54 takes out.

In addition, for drg portion 191, configuration is walked with drg 192 in arrester shell 196, can come the drg braking to remove this walking of operation drg 192 by brake service bar 198 via drg effect sheet 197.The 199th, hinged in the brake bar fulcrum of arrester shell 196.

And, arrester shell 196 loads and unloads with the leap state between the outer peripheral face base portion of the sidewall that is installed on housing body 54 freely and rear axle casing 8, by take off this arrester shell 196 from these, walk with drg 192 and can take off from the top ends of big differential gear fulcrum 186 integratedly with this arrester shell 196.

So, for box of tricks 48, can adopt selectively as shown in Figure 11 (a), make big retarding gear 183 be engaged in output from right side side with bevel gear 180 and the state of installing, with as shown in Figure 11 (b), box of tricks 48 is formed the state that spins upside down left-right reversed, make big retarding gear 183 be engaged in output from left side side with bevel gear 180 and the state of installing.

Therefore, can be according to working rig that is connected in trac. A or mode of operation, by selecting the mounting means of box of tricks 48, change the working direction (main operator to) of this trac. A simply.

Next, describe with regard to the formation of PTO gearshift portion 6 with reference to Figure 10, Figure 12 and Figure 13.

That is, for PTO gearshift portion 6, as shown in Figure 10, Figure 12 and Figure 13,200 loading and unloading of PTO case are installed on the peristome 111 that forms freely on the rear end of housing body 54, configuration PTO gearshift 201 in this PTO case 200.

And, PTO case 200 is by anterior box-shaped adult 202 that disposes and the rear portion box-shaped adult 203 that disposes with the state that bloats backward from housing body 54 form to be contained in the state in the housing body 54, the installation sheet 204 of integrally formed flange-like in the front periphery portion of rear portion box-shaped adult 203, make this installation sheet 204 be contacted with the end edge portion of housing body 54 from the rear, and by axis forwards, backwards the hold-down bolt 205 of direction install.

So, because PTO case 200 is installed in loading and unloading freely on the peristome 111 of the rear end that is formed at housing body 54, so can easily be contained in the assembling operation or the maintenance activity of the PTO gearshift 201 in this PTO case 200.

Here, between the top of the end edge portion of the rear portion of above-mentioned lift arm supporter 108 and housing body 54, be installed with and be used for the boxed rod support 206 of leading section of hinged connection boxed rod 12, the top of the end edge portion that this boxed rod support 206 is contacted with housing body 54 by the rear portion and the face of lift arm supporter 108 and the tabular mount pad 207 installed by hold-down bolt 210 and form from the outstanding backward tabular hinged connecting strap 208,208 of pair of right and left that is provided with in the back of this mount pad 207.The 209th, connecting bore.

And the bottom of mount pad 207 is contacted with rear portion box-shaped adult 203 from the rear installation sheet 204 forms and is coincidence status, and securely is installed on the end edge portion of housing body 54 in the lump by hold-down bolt 205.

In addition, on the left and right sides sidewall of rear portion box-shaped adult 203, outwards the lifting cylinder fulcrum 211,211 that is provided as the lift arm installation portion is given prominence in the side, is folded in the lifting cylinder 212,212 of expanding-contracting action on the above-below direction between the middle part of each lifting cylinder fulcrum 211,211 and above-mentioned lift arm 110,110.The 213rd, lifting cylinder connecting pin, the 214th, the hinged connecting strap of lifting cylinder.

So, because on the left and right sides location of rear portion box-shaped adult 203, be configured in the pair of right and left lifting cylinder 212,212 of expanding-contracting action on the above-below direction, and make the bottom of each lifting cylinder 212,212 be supported in rear portion box-shaped adult 203 via lifting cylinder fulcrum 211,211, therefore, the posture that two lifting cylinders 212,212 is become vertically or roughly dispose vertically becomes easy, can shorten the stroke of each lifting cylinder 212,212, can realize the miniaturization of each lifting cylinder 212,212, can also the depowering loss.

And, because the bottom of each lifting cylinder 212,212 is supported in rear portion box-shaped adult 203 via lifting cylinder fulcrum 211,211, so can support each lifting cylinder 212,212 securely.

In addition, for example, by reducing the left and right sides width of rear portion box-shaped adult 203, pair of right and left lifting cylinder 212,212 is disposed at the left and right sides location of rear portion box-shaped adult 203, and be disposed in the left and right sides width of housing body 54, can increase the degree of freedom of lifting linking member mechanism to the installation site of this housing body 54.

Next, PTO gearshift 201 is described, for this PTO gearshift 201, as shown in Figure 8, in PTO case 200, rotate the axis of support freely input shaft 220 and gearshift axle 221 and PTO axle 222 of direction forwards, backwards respectively via bearing 223,224,225,226,227,228, input shaft 220 makes top ends 240 outstanding forward from the input shaft protrusion 239 that the antetheca at PTO case 200 forms, on the other hand, PTO axle 222 makes top ends 242 outstanding backward from the PTO axle protrusion 241 that the rear wall at PTO case 200 forms.

And, output gear 229 is set on input shaft 220, on the other hand, the major diameter input gear 230 and the first retaining gear 231 and the second retaining gear 232 are installed coaxially on gearshift axle 221, are made above-mentioned major diameter input gear 230 be engaged in above-mentioned output gear 229.

In addition, on PTO axle 222, on axis direction, slide and move spline fitted traveling gear body 233 freely, and input gear 235 is installed freely via bearing 234 rotations, major diameter traveling gear 236 and minor diameter traveling gear 237 are set on traveling gear body 233, on the other hand, on the front of input gear 235, form above-mentioned minor diameter traveling gear 237 and insert also ingear insertion engaging gear 238.

So, make traveling gear body 233 make major diameter traveling gear 236 be engaged in a PTO gear shift operation of the above-mentioned first retaining gear 231 and minor diameter traveling gear 237 is inserted by not shown PTO gear shift operation mechanism and be engaged in the 2nd PTO gear shift operation of inserting engaging gear 238.

In addition, the top ends 240 of input shaft 220, as shown in Figure 5, being connected via PTO system transmission shaft 169 constitutes PTO system transmission device 52 in above-mentioned outside axle drive shaft 20, and PTO system transmission shaft 169 disposes from the front portion to rear axle alignment fore-and-aft direction ground in change speed gear box 45.

That is to say that PTO system transmission shaft 169 as shown in Figure 5, connects first～the 4th and cuts apart transmission shaft 245,246,247,248 and form on fore-and-aft direction.

And, first cuts apart transmission shaft 245, as shown in Fig. 5 and Fig. 7, rotate via bearing 249,250 and to be set up in freely between the rear wall 27 and above-mentioned inner support wall 57 of clutch case 17, first cut apart on the middle part of transmission shaft 245 input gear 244 is set at this, make this input gear 244 be engaged in PTO driven wheel 20c.

In addition, second cuts apart transmission shaft 246, as shown in Fig. 5 and Fig. 7, via bearing 251 middle part rotated and to be supported in above-mentioned supporting walls organizator 55 freely, and leading section is connected in above-mentioned first via the first tubular connector 252 cuts apart transmission shaft 245.

The 3rd cuts apart transmission shaft 247, as shown in Fig. 5 and Figure 10, via bearing 253 middle part is rotated and to be supported in axle bearing body 118 freely, and leading section is connected in above-mentioned second via the second tubular connector 254 cuts apart transmission shaft 246.

The 4th cuts apart transmission shaft 248, as shown in Fig. 5 and Figure 10, leading section is connected in the above-mentioned the 3rd cuts apart the rearward end of transmission shaft 247 via free-wheel clutch 255, and make rearward end be connected in the top ends 240 of above-mentioned input shaft 220 via the 3rd tubular connector 256.

Here, free-wheel clutch 255 is by being installed on the 3rd anterior power-transfer clutch organizator 257 of cutting apart the rearward end of transmission shaft 247, with be installed on the 4th rear portion power-transfer clutch organizator 258 of cutting apart the leading section of transmission shaft 248 and form, make the outstanding meshing flake 259 that is provided with on the back of power-transfer clutch organizator 257 forwardly, mesh the front and back relative status with the outstanding meshing flake 260 that is provided with on the front of rear portion power-transfer clutch organizator 258, two meshing flakes 259 when just changeing, 260 engage and the three or four cut apart transmission shaft 247,248 rotate on positive veer integratedly, on the other hand, two meshing flakes 259 when reversing, 260 do not engage.

So, be delivered to the power of outside axle drive shaft 20 from driving engine 15, be delivered to the PTO driven wheel 20c → input gear 244 → the first that is integrally formed in this outside axle drive shaft 20 and cut apart transmission shaft 245 → the first tubular connectors 252 → the second and cut apart transmission shaft 246 → the second tubular connector 251 → three and cut apart transmission shaft 247 → free-wheel clutch 255 → 4th and cut apart transmission shaft 248 → the 3rd tubular connector 256 → input shaft 220.

And, at PTO gearshift 201 during by a PTO gear shift operation, be delivered to the power of input shaft 220, be delivered to major diameter traveling gear 236 → PTO axle 222 of output gear 229 → major diameter input gear 230 → gearshift axle 221 → the first retaining gears 231 → traveling gear body 233, can take out power and drive various working rigs by this PTO axle 222.

In addition, at PTO gearshift 201 during by the 2nd PTO gear shift operation, be delivered to the power of input shaft 220, be delivered to minor diameter traveling gear 237 → PTO axle 222 of output gear 229 → major diameter input gear 230 → gearshift axle 221 → the second retaining gears 232 → input gear 235 → traveling gear body 233, can take out power and drive various working rigs by this PTO axle 222.

At this moment, PTO axle 222 reverses even be subjected to from the load of various working rigs, its transmission of power is cut apart transmission shaft 248 to input shaft 220 → the 3rd tubular connector 256 → 4th, also because cutting apart transmission shaft 248 and the 3rd the 4th cuts apart between the transmission shaft 247 to press from both sides and established free-wheel clutch 255, be delivered to the 3rd and cut apart transmission shaft 247 so power is not cut apart transmission shaft 248 from the 4th.

Thereby, can prevent to be delivered to upstream with the running gear transmission device 51 headed by the main gearshift 46 from PTO axle 222 by power, this running gear transmission device 51 such as is damaged at the generation of problem.

Particularly, as shown in Figure 14, in the power-transfer clutch portion 3 of single clutch specification, because make to be located at first and to cut apart input gear 244 on the transmission shaft 245 and be engaged in and be located at the rear portion and cut apart PTO driven wheel 300 on the drive axle segments 31, first cut apart transmission shaft 245 → input gear 244 → PTO driven wheel 300 → rear portion and cut apart drive axle segments 31 → master main shaft 58 of shifting gears so can come anti-reliably stopping power to be delivered to this upstream by free-wheel clutch 255.

And, by free-wheel clutch 255 is set in housing body 54, carrying out the walking shown in Figure 10 power-transfer clutch 21 and the double-clutch specification of PTO with power-transfer clutch 22, when the change of only walking shown in Figure 14 with the mutual specification of the single clutch specification of power-transfer clutch 21, keep former state as common ground in the change speed gear box 45, only depend on reline the clutch portion 3, just can carry out the change of specification simply.

In addition, as Fig. 2, Fig. 3, shown in Fig. 5 and Fig. 7, in the front portion, left side of change speed gear box portion 4 power taking-up portion 350 is set, this power taking-up portion 350, left side wall front portion at main gearshift case 53, via hold-down bolt 360 loading and unloading the power that outwards bloats and form is installed freely and is taken out case 351, rotating freely via bearing 352 around its axis in this power takes out case 351, the power of installation shaft alignment fore-and-aft direction takes out axle 353, take out at this power and power to be installed on the axle 353 to take out, this power is taken out be engaged in via intermediate gear 355 to be located at above-mentioned first input gear 244 of cutting apart the middle part of transmission shaft 245 with input gear 354 with input gear 354.The 356th, intermediate gear fulcrum, the 357th, bearing.

And, also as shown in Figure 15, the leading section that takes out axle 353 at power makes that to be engaged sheet 358 outstanding forward, on the other hand on the input shaft 361 of air compressor 312 on axis direction spline fitted slide mass 362 sliding freely, the outstanding backward meshing flake 359 that is provided with on the rearward end of this slide mass 362, make this meshing flake 359 can be engaged in the above-mentioned sheet 358 that is engaged, the base end part that front and back is rotated the operating handle 313 be installed on air compressor 312 freely is connected in slide mass 362 via dialling retaining fork 363, links to make meshing flake 359 advance and retreat actions in the rotating operation of this operating handle 313.

In addition, in Figure 15, the 364th, the engagement loading spring is loaded meshing flake 359 being engaged in be engaged on the direction of sheet 358 by this engagement loading spring 364.The 365th, the handle director is directed to engagement operations position (イ) and engagement releasing operating position (mouth) to operating handle 313, and locates and can remain in this position to operating handle 313 joints at engagement releasing operating position (mouth).

So, operate engagement operations position (イ), meshing flake 359 is retreated move and be engaged in and be engaged sheet 358, make air compressor 312 actions by rotating operating handle 313.

On the other hand, operate engagement releasing operating position (mouth), meshing flake 359 is advanced move and remove and the engagement that is engaged sheet 358, air compressor 312 is removed moved by the rotating operation handle 313 that makes progress.

In addition, in the present embodiment, having the walking power-transfer clutch 21 that cuts off running gear power, in the change speed gear box portion 4 of the PTO that cuts off the PTO system dynamic with power-transfer clutch 22 (so-called dual clutch mechanism), because air compressor 312 is connected in PTO system transmission device 52, even drg braking walking is not cut off the transmission of power to air compressor 312 with drg 192 yet so cut off walking to use power-transfer clutch 21.Thereby, as prior art, can obtain and the same effect of occasion that air compressor 312 is installed on the timing-gear chamber of driving engine 15.

And, air compressor 312 installing (being connected) in the occasion of power taking-up portion 350, suitably working rig before the snow-cleaner etc. is connected in this power taking-up portion 350, can utilize this power taking-up portion 350 as middle PTO.

Industrial applicibility

(1) in the described the present invention of first aspect, arranges at the running part that is pulled vehicle Aor brake mechanism, on the other hand, being connected in gearbox section is provided with air compressing Machine supplies to aor brake mechanism from this air compressor with compressed air, makes this air-making Moving device mechanism becomes and can brake.

So, be arranged at gearbox section by air compressor is connected, do not make and send out It is special that the shape of the timing-gear chamber of motivation becomes, thereby so that have the engine of versatility Use become possibility, can realize the reduction of cost.

(2) in the described the present invention of second aspect, air compressor is connected and is arranged at One side-walls of gearbox section and the part between front vehicle wheel and rear wheel from the side, Be provided with the operating portion that motion action is used at this air compressor.

So, because being connected, air compressor is arranged at a sidewall in gearbox section Place and the part between front vehicle wheel and rear wheel from the side, therefore, can be well Guarantee to be located at the operability of the operating portion that the motion action on this air compressor uses.

(3) in the described the present invention of the third aspect, air compressor is disposed at from the side joins Be located between front vehicle wheel and the rear wheel lifting with end difference near.

So, see that from the side the lifting that is provided between front vehicle wheel and the rear wheel is with near the end difference because air compressor is disposed at, so, by by this lifting with end difference operator up and down, just can carry out lifting nearby continuously and expeditiously with the knee-action of end difference, with operation via the operating portion of air compressor.

(4) in the described the present invention of fourth aspect, air compressor be disposed at above the ground board of the Drive Section that in change speed gear box portion, is set below.

So, because air compressor is disposed at above the ground board of the Drive Section that in change speed gear box portion, is set below, so, can on this ground board, not be provided with and dispose air compressor concavo-convexly, can guarantee the livability of the operator on this ground board well.

Claims (4)

1. trac. is characterized in that:

Change speed gear box portion is connected in primary mover portion, makes walking become possibility to front vehicle wheel and rear wheel transmission of power respectively, and connect via bindiny mechanism and to be pulled vehicle, can draw this and be pulled vehicle by this change speed gear box portion, wherein,

The running part that is pulled vehicle is provided with power-absorption fan mechanism, on the other hand, be connected in change speed gear box portion in the mode of taking out power from change speed gear box portion and be provided with air compressor, from this air compressor with compressed-air supply to power-absorption fan mechanism, make this power-absorption fan mechanism become and can brake.

2. the described trac. of claim 1 is characterized in that:

Air compressor is connected and is arranged in a side-walls of change speed gear box portion and sees part between front vehicle wheel and rear wheel from the side, and this air compressor is provided with the operating portion that motion action is used.

3. the described trac. of claim 2 is characterized in that:

Air compressor is disposed to be seen from the side near the lifting usefulness end difference that is disposed between front vehicle wheel and the rear wheel.

4. the trac. described in any one in the claim 1～3 is characterized in that:

Air compressor be disposed at above the ground board of Drive Section set in change speed gear box portion below.

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