CN2227046Y

CN2227046Y - Minisize walking tractor

Info

Publication number: CN2227046Y
Application number: CN 95241680
Authority: CN
Inventors: 顾凡清
Original assignee: Individual
Current assignee: Individual
Priority date: 1995-05-31
Filing date: 1995-05-31
Publication date: 1996-05-15
Anticipated expiration: 2005-05-31

Abstract

The utility model relates to a minisize walking tractor, consisting of a body, a power system, a mulch tillage mechanism and a rotary tillage mechanism. The technical features of the utility model are that the micro walking tractor also consists of a set of conveyance system; the mulch tillage mechanism, the rotary tillage mechanism and the conveyance system can be arranged on the body or dismounted from the body according to the demands; the power system designs a starting mechanism, a cooling mechanism, an automatic on-off mechanism, a speed reducing mechanism, a speed changing mechanism, etc., which are assorted with the engine and arranged on the lower part of the center of the body; the minisize walking tractor changes the counterforce conduction of the ploughs. The utility model is characterized in that the utility model has small size, multiple functions, big traction, convenient operation, labor saving, and long service life and can be freely dismounted and combined. The minisize walking tractor is suitable for being used by peasant households in the plains, hilly countries and the mountain areas.

Description

Miniature walking tractor

The utility model belongs to field of agricultural machinery, is a kind of miniature walking tractor.

Trac. is the modal farm machinery of farming operation, according to its volume, structure difference, can be divided into large tractor, walker tractor and small four-wheel tractor.Large tractor only is suitable for large-scale farm to be used, though it is the peasant household's needs that carry out agricultural production of unit that walker tractor and small four-wheel tractor are fit to the family, but because of selling at exorbitant prices, many peasant households are difficult to again bear, so that still carry out farming with livestock so far in many places.In addition, these trac.s are all former thereby can't go up a hill because of volume, structure and weight, make it not use narrow application range on hills and mountain area and other places.In order to address the above problem, Chinese patent CN2111618U has released a kind of " agricultural tiller ".This machine is made up of power system, walking farming mechanism and operating mechanism, its technical essential is the place ahead that ploughing mechanism is arranged on power system, thereby have simple in structure, small and exquisite, price is low, advantage such as applied widely, but owing to also have problems due to the structure: as, one, because power system is arranged on this machine back upper place, account for the of complete machine weight, thereby the center of gravity height, execute, the required actuating force of ploughing is excessive; Two, tractive force is little, about 85～110 kilograms; Three, the plough seat directly links to each other with front axle, makes the ploughing antagonistic force be directly conducted to front axle, and front axle is fragile; Four, belt-driving easily skids, and speed-changing mechanism is easily beaten tooth; Five, the supporting difficulty of driving engine etc., thus cause yielding poorly, the cost height, tissue is produced difficulty in enormous quantities.In addition, because this machine function singleness, the traditional farmer household time used is short, standby time is long, makes it easily to get rusty on the one hand, also forms waste on the other hand.

Task of the present utility model is to solve the problem that prior art exists, for traditional farmer household provide that a kind of volume is little, function is many, operation is light, laborsaving, tractive force is than greatly and the miniature walking tractor of long service life.

Task of the present utility model is finished by following technical proposals.

The miniature walking tractor that the technical program discloses comprises body, power system, ploughing mechanism, rotary tillage mechanism and transport systems.Body is made of farming traveling gear and operating mechanism.Power system mainly is made of driving engine, power-transfer clutch and change-speed box, and is installed in below, body middle part, links to each other with operating mechanism with the farming traveling gear of body.Ploughing mechanism is mainly supported by colter, plough seat and plough back and constitutes, and is positioned at body the place ahead, by the operating mechanism control of body.Rotary tillage mechanism then is fixed on the body back lower place.Transport systems mainly by vehicle frame, left and rightly take turns, back train and shelf constitute, the left and right wheel is installed in the body both sides, and links to each other with the back train by vehicle frame, shelf are fixed on above the body.Wherein ploughing mechanism, rotary tillage mechanism and transport systems can be according to using needs to install and remove on body.

During use, plough the field, can adorn colter on supporting in the plough seat before the body that power system has been installed, plough back as need, plough; After ploughing the field, break up the clods as need and to carry out smoothly, colter can be taken off, load onto rotary tillage mechanism in the body back lower place, rotovator.Take off colter and rotary tillage mechanism when simultaneously, refill transport systems, but the transport trolley of load-carrying.

Concrete structure of the present utility model is provided by accompanying drawing, but is not limited to accompanying drawing.

Description of drawings:

Fig. 1 is a perspective view of the present utility model;

Structural representation when Fig. 2 is the utility model ploughing;

Fig. 3 is the utility model plough seat, plow bracket and body annexation scheme drawing;

Structural representation when Fig. 4 is the utility model rotary tillage;

Fig. 5 connects and power conduction scheme drawing for the utility model power system;

Structural representation when Fig. 6 transports for the utility model.

Provide embodiment below in conjunction with accompanying drawing, and the utility model is described in further detail.

As shown in Figure 1, the utility model comprises body 1, power system 30, ploughing mechanism 60, rotary tillage mechanism 66 and transport systems 67.

Body is made of farming traveling gear and operating mechanism, sees Fig. 1,2,4,6.The farming traveling gear of body 1 is made of main shaft 2, main shaft adapter plate 3, front axle 4, front axle bracket 12, deploying and retracting axis 13, folding and unfolding bar 14, chain drum 16, chain 17, last axle 19, walking ratchet 20 and support wheel 21.Main shaft adapter plate 3 has two, respectively be one to be the arc shape board of short " L " shape, on the plate top of symmetry fixing on axle 19, turn of bilge is by bearings fixed main shaft 2.One end of main shaft 2 links to each other with transmission gear 58 engagements of power system 30 by stretching out the gear of installing on a side main shaft adapter plate 3 external end heads 22, the other end is by stretching out the chain drum 16 on the opposite side main shaft adapter plate 3, link to each other with chain drum 16 on the deploying and retracting axis 13 with chain 17, see Fig. 5.In order to prevent that silt particle from entering in chain 17, the chain drum 16, chain cover 18 sealings are housed outside chain 17, chain drum 16.Walking ratchet 20 is installed in main shaft 2 middle parts between the two main shaft adapter plates 3, has the long pointed tooth of some projectioies on its wheel face, can insert earth when walking with farming in soft earth, prevents to skid, and reduces walking resistance.Deploying and retracting axis 13 both sides have respectively interlocked a folding and unfolding bar 14, and folding and unfolding bar 14 is inverted "L" shaped, have upper and lower folding and unfolding knock hole on the long limit, and deploying and retracting axis 13 is by inserting or time folding and unfolding knock hole is attached thereto, and adjust itself and floor level.The kink cover of folding and unfolding bar 14 is connected on the axle 19, and the minor face end has handrail location regulating tank 15.Front axle bracket 12 has two, respectively is a L-shaped frame plate, front axle 4 by bearing installation between two relative front axle brackets 12 of minor face.In order to prevent that front axle 4 from advancing silt particle, the influence running is with axle bush 6 on the front axle 4, and outside axle bush 6, fender 7 is housed successively, felt 8, packing seal 9, seal ring 10, see Fig. 3.Support wheel 21 is sleeved on front axle 4 middle parts, and the long limit end of front axle bracket 12 links to each other with main shaft adapter plate 3 front ends with attaching parts by connecting panel.The operating mechanism of body 1 is by handrail 23, throttle control handle 24, gear change hand lever 25, and plough joystick 29 constitutes.Handrail 23 is "  " shape, its two ends are connected in 19 two ends of going up of stretching out outside the folding and unfolding bar 14 by the attaching parts activity respectively, are located the height of the fit adjustment fixed armrest 23 of regulating tank 15 simultaneously again by the handrail on fixed connecting piece and folding and unfolding bar 14 minor faces by handrail 23 terminations.Throttle control handle 24, gear change hand lever 25 are installed on handrail 23 crossbeams, and are connected with power system 30 by control line respectively.In addition, on handrail 23 crossbeams illuminating lamp 26, light switch 27, horn switch 28 etc. are installed also.Plough joystick 29 has two, and front end links to each other with ploughing mechanism 60, and the position-limited trough that open by the bar below at the rear portion links to each other with last axle 19.

Power system 30 is made of starting mechanism 31, fan 37, driving engine 38, power-transfer clutch 42, retarder 43, change-speed box 48 and gear drive 58, sees Fig. 5.Driving engine 38 is selected motor cycle engine for use, as the agricultural motor cycle engine of Jialing 50 type.Because this driving engine 38 can not be directly used on the tiller, thereby need to solve starting, cooling, automatic clutch, multi-stage speed-reducing and speed change problem.The starting mechanism 31 that solves starting is made of driving wheel 32, stay cord 79, miniature gears 33, helical wheel 34,35 and torsion spring 36, is fixed on the engine housing 41, and links to each other with the right bent axle 39 of driving engine.Driving wheel 32 is an inner gear, has rope groove on the appearance anchor ring, in stay cord 79 winding groove, rotated by its pulling driving wheel 32, and the miniature gears 33 of drive and driving wheel 32 internal gearings rotates.Helical wheel 34,35 has two, be meshing with each other, because wherein helical wheel I34 is coaxial with miniature gears 33, right bent axle 39 coaxial lines of helical wheel II35 and driving engine when the axial force promotion helical wheel II35 of helical wheel I34 is moved to the left, can drives the right bent axle 39 of driving engine and rotate, after driving engine 38 startings, the inclined-plane skids automatically, at this moment unclamps stay cord 79, and the torsion spring 36 that is connected on driving wheel 32 and the engine housing 41 will make driving wheel 32 reset.The cooling problem is solved by the fan 37 that cover is connected on the right bent axle.The automatic clutch problem is then solved by the self-acting clutch 43 that cover is connected on the left bent axle 40.On the left bent axle 40 outside self-acting clutch 42 retarder 43 is installed, retarder 43 has two, is connected in series.Because space, bent axle 40 place, a driving engine left side is little, so retarder of the present utility model 43 is selected planetary reduction gear for use, each planetary reduction gear all is made of inner gear 44, planetary wheel 45, core wheel 46 and sun gear 47.Inner gear 44 is fixed on the engine frame, with three planetary wheels 45 of clutch output gear ingear by on the uniform concave surface that is installed in inner gear 44 of the pin-and-holes on "T"-shaped core wheel 46 dishes and with its internal gearing, driving core wheel 46 simultaneously rotates, sun gear 47 covers are connected in core and take turns outside 46 wheel hubs, and power is exported by it.Change-speed box 48 is connected driving engine left side bent axle 40 axle heads outside the retarder 43, is made of gear cluster 50～52, big gear wheel 53, spline projection 54, gearbox forks 55, output gear wheels 56 and variable shaft 57.Variable shaft 57 is fixed on the mission case 49 by bearings.Gear cluster 50～52 is three gears in meshs side by side, cogs 50 to be fixed on driving engine left side bent axle 40 end points, and lower gear 52 and big gear wheel 53 are sleeved on the variable shaft 57, and wherein big gear wheel 53 links to each other with sun gear 47 engagements of second stage retarder 43.At the gearbox forks 55 that key on the variable shaft 57 between lower gear 52 and the big gear wheel 53 connects spline projection 54 and is attached thereto on it, this gearbox forks 55 is by 25 controls of the gear change hand lever on the body handrail 23.When spline projection 54 is pitched 55 groups at a high speed to the right, promptly link to each other with big gear wheel 53 percussions, power on the big gear wheel 53 and rotation direction are passed to variable shaft 57, pass to the gear 22 of body main shaft 2 one side heads again by the output gear wheels 56 that are installed in variable shaft 57 mouths and link to each other, body 1 is advanced with gear drive 58.As spline projection 54 by 55 groups of gearbox forkss to the left side, then link to each other with lower gear 52 percussions, finish fallback function.When being in meta, finish the neutral gear function as spline projection 54.

In order to prevent change-speed box 48, gear drive 58 water inlets, outside change-speed box 48 and gear drive 58, all be covered with casing 49,59 and seal.

Ploughing mechanism supports 64 by 60 by colter 61, plough seat 63, plough back and constitutes, and sees Fig. 2.Colter is that two-way colter 61, plough back are supported and be plow bracket 64.Plow bracket 64 is a convex door frame, outside being sleeved on before the body front axle bracket 12, and be connected outside the minor face of body front axle bracket 12 with spring collar 11 by the kink of two body side frames, make from being connected in framework top plough seat 63 and pass the antagonistic force that plows of coming, do not directly act on front axle 4 but conduct on front axle bracket 12, prolonged the service life of front axle 4 by 64 liang of body side frames of plow bracket.The plough depth location regulating tank 65 of the afterbody of plow bracket 64 by opening on it links to each other with main shaft adapter plate 3 with regulating bolt.Plow bracket 64 framework front upper parts are designed to hypotenuse, to adapt with two-way colter 61 back shape.Two-way colter 61 usefulness attaching partss are bolt on plough seat 63 and plow bracket 64, and the two movable leaves 62 on its top link to each other with two plough joysticks 29 respectively.When ploughing, with the earth overturning left side, joystick 29 reaches on the right can be cooperated fixed limit by the position-limited trough below the bar with last axle 19 then as need.Otherwise, then will moving behind the

right joystick

29,29 reaches of left side joystick and fixed limit get final product.

Rotary tillage mechanism 66 is made of the rotary blade more than two, and every is rotary blade 66 usefulness attaching partss that bolt is installed on the tool rest that body deploying and retracting axis 13 opened.During rotary tillage, pull down preposition two-way colter 61, deploying and retracting axis 13 is transferred in the next folding and unfolding knock hole of folding and unfolding bar 14, by handrail 23 front axle is partly upwarped down, can start power system 30 and drive rotary blades 66 work, see Fig. 4.The rotary blade of present embodiment is 13.

Transport systems 67 by vehicle frame 68, left and rightly take turns 70,

back train

71,72, wheel connecting panel 73, seat cushion 74, shelf 75, bumper 76,

braking mechanism

77,78 constitute, and sees Fig. 1,6.Vehicle frame 68 is " Y " shape, and preceding two ends are connected on the wheel connecting panel 73, tiltedly links to each other with

back train

71,72 on the back bar.Back train comprises wheel 71 and wheel front fork 72, and this front fork 72 is the motor bike front fork, and seat cushion 74 is fixed on wheel 71 tops.Left and rightly take turns 70 and be installed in body 1 both sides by left and right wheel connecting panel 73.Left and right wheel connecting panel 73, be inverted "L" shaped, long limit one end links to each other with body deploying and retracting axis 13 by bearing, the kink cover is connected on the axle 19, the minor face end has handrail location regulating tank 15, can be by holding handrail 23 height that hole of opening hand 23 ends and the fit adjustment activity of regulating bolt are connected in axle 19 two ends under the arm.Shelf 75 are the framework of angle steel welding, by being connected in bumper 76 supports on vehicle frame 68 and the body and being fixed in body 1 top.The plank of can on framework, mating formation during loading.In order to make shelf 75 more firm, the upright abutment sleeve 9 that makes progress is arranged on vehicle frame 68 back braces, the latch under shelf 75 after cross members can insert wherein.Braking mechanism comprises brake treadle 77 and brake disc 78, and brake disc 78 is installed on the deploying and retracting axis 13 of wheel 70 inboards, and links to each other with the brake treadle 77 that stretches to the back train.When the utility model is done the transport trolley use, two-way colter 61 and rotary blade 66 can be taken off, load onto transport systems 67 and get final product.

Performance perameter of the present utility model is:

1. ploughing is wide 240 millimeters, and 60～180 millimeters of tilling depth are adjustable, and farming efficient is 0.65～0.9 mu/hour; 2. rotary tillage is wide 600 millimeters, 70 millimeters of tilling depth, 1.8 mu/hour of farming efficient; 3. load-carrying is 350 kilograms, 10.7～14 kilometers/hour of speed per hours, 130 millimeters of minimum ground clearances; 4. tractive force is 180 kilograms; 5. oad is removed handrail, and length is 860 * 395 * 500 (millimeters), and the combined vehicle length is 2132 * 800 * 615 (millimeters); 6. main frame is about 50 kilograms.

Compared with the prior art the utility model has following advantages:

1. volume is little, function is many, and the user can be in 30 minutes, Dismountable become plough, Rotary cultivator or transport vehicle, widely applicable, this machine is fully used.

2. pass through the design to mechanisms such as starting, cooling, automatic clutch, deceleration, speed changes, Solved the supporting difficulty of engine, preponderance, center of gravity is too high, the problem that required steering force is excessive, Make it to operate light, laborsaving.

3. improved tractive force. Namely bring up to 180 by 85～110 kilograms of prior art Kilogram.

4. improved service life, particularly made easily damage problem of front axle obtain essence Improvement.

5. in light weight, main frame weight is reduced to about 50 kilograms by the 120 kg (actual measurement) of prior art, thereby both can go up a hill voluntarily, and available again manpower back mountain is gone, and is suitable for Plain, intersected country and mountain area traditional farmer household and uses.

Claims

1, a kind of miniature walking tractor comprises body (1), power system (30), ploughing mechanism (60) and rotary tillage mechanism (65), and body (1) is made of farming traveling gear and operating mechanism; Power system (30) mainly is made of driving engine (38), power-transfer clutch (42) and change-speed box (48), and is installed on the body (1), links to each other with operating mechanism with the farming traveling gear of body (1); Ploughing mechanism (60) mainly supports (64) by colter (61), plough seat (63) and plough back and constitutes, and is positioned at body (1) the place ahead, by the operating mechanism control of body (1); Rotary tillage mechanism (65) then is connected in body (1) back lower place, it is characterized in that also comprising a cover transport systems (67), this transport systems (67) mainly is made of vehicle frame (68), the left and right wheel (70), back train (71,72) and shelf (75), the left and right wheel (70) is installed in body (1) both sides, and link to each other with back train (71,72) by vehicle frame (68), shelf (75) are fixed on above the body (1); Power system (30) is installed in below, body (1) middle part; Ploughing mechanism (60), rotary tillage mechanism (65) and transport systems (67) are detachable on body (1).

2, miniature walking tractor according to claim 1, it is characterized in that transport systems (67) also comprises wheel connecting panel (73), seat cushion (74), bumper (76) and braking mechanism (77,78), a left side, right wheel (70) is by a left side, right wheel connecting panel (73) is installed in body (1) both sides, braking mechanism (77,78) position thereon, vehicle frame (68) is " Y " shape, preceding two ends are connected in a left side, on the right wheel connecting panel (73), oblique and back train (71 on the back bar, 72) link to each other, seat cushion (74) is fixed on back train (71,72) on, shelf (75) support and are fixed on the body (1) by being connected in bumper (76) on vehicle frame (68) and the body (1).

3, miniature walking tractor according to claim 1 and 2 is characterized in that:

1. the farming traveling gear of body (1) is by main shaft (2), main shaft adapter plate (3), front axle (4), front axle bracket (12), deploying and retracting axis (13), folding and unfolding bar (14), chain drum (16), chain (17), last axle (19), walking ratchet (20) and support wheel (21) constitute, main shaft adapter plate (3) has two, respectively be one to be the arc shape board of short " L " shape, the fixing axle (19) of going up in its top, turn of bilge fixed main shaft (2), walking ratchet (20) is installed in main shaft (2) middle part between the two main shaft adapter plates (3), main shaft (2) one ends link to each other with transmission gear (58) engagement of power system by the gear on the termination (22), the other end is by chain drum (16), chain (17) links to each other with deploying and retracting axis (13), deploying and retracting axis (13) both sides have respectively interlocked a folding and unfolding bar (14), folding and unfolding bar (14) is inverted "L" shaped, have on the long limit, the next folding and unfolding knock hole, folding and unfolding bar (14) links to each other with deploying and retracting axis (13) by the folding and unfolding knock hole, the kink cover of folding and unfolding bar (14) is connected on the axle (19), the minor face end has handrail location regulating tank (15), front axle bracket (12) has two, it respectively is a L-shaped frame plate, front axle (4) is installed between relative two front axle brackets (12) of minor face, support wheel (21) is enclosed within front axle (4) middle part, and the long limit end of front axle bracket (12) links to each other with main shaft adapter plate (3) front end by connecting panel;

2. the operating mechanism of body (1) is by handrail (23), throttle control handle (24), gear change hand lever (25), plough joystick (29) constitutes, handrail (23) is "  " shape, its two ends respectively activity be connected in the axle (19) two ends, and by the fit adjustment fixed armrest height of termination by the location regulating tank of the handrail on fixed connecting piece and folding and unfolding bar (14) minor face (15), throttle control handle (24), gear change hand lever (25) is installed on handrail (23) crossbeam, and be connected with power system (30) by control line respectively, plough joystick (29) has two, front end links to each other with ploughing mechanism (60), and the position-limited trough that open by the bar below at the rear portion links to each other with last axle (19).

4, miniature walking tractor according to claim 3 is characterized in that power system (30) also comprises starting mechanism (31), fan (37), retarder (43) and gear drive (58), wherein:

1. driving engine (38) is selected motor cycle engine for use, and this driving engine (38) links to each other with power-transfer clutch (42), retarder (43), change-speed box (48) successively by left bent axle (40), links to each other with fan (37), starting mechanism (31) successively by right bent axle (39);

2. starting mechanism (31) is fixed on the engine housing (41), by driving wheel (32), stay cord (79), miniature gears (33), helical wheel (34,35) and torsion spring (36) constitute, driving wheel (32) is an inner gear, have rope groove on the appearance anchor ring, in stay cord (79) winding groove, can rotate by its control pulling driving wheel (32), miniature gears (33) and driving wheel (32) internal gearing, helical wheel (34,35) there are two to be meshing with each other, helical wheel I (34) is coaxial with miniature gears (33), helical wheel II (35) and right bent axle (39) coaxial line of driving engine, torsion spring (36) one ends are connected driving wheel (32), and the other end is connected on the engine housing (41);

3. retarder (43) has two, be series on the left bent axle (40) on the driving engine, each is made of inner gear (44), planetary wheel (45), core wheel (46) and center gear (47), inner gear (44) is fixed on driving engine (38) frame, with power-transfer clutch (42) three planetary wheels of output gear ingear (45) by "T"-shaped core take turns pin-and-hole on (46) dish uniform be installed on inner gear (44) concave surface and with its internal gearing, driving core wheel (46) simultaneously rotates, sun gear (47) cover is connected in outside core wheel (46) wheel hub, by its outputting power;

4. change-speed box (48) is connected driving engine left side bent axle (40) axle head, by gear cluster (50～52), big gear wheel (53), spline projection (54), gearbox forks (55), output gear wheels (56) and variable shaft (57) constitute, variable shaft (57) is by bearings, gear cluster (50～52) is three gears in meshs side by side, cog (50) be fixed on left bent axle (40) termination of driving engine, lower gear (52) and big gear wheel (53) are sleeved on the variable shaft (57), wherein big gear wheel (53) links to each other with sun gear (47) engagement of second stage retarder, variable shaft (57) between lower gear (52) and big gear wheel (53) is gone up the gearbox forks (55) that key connects spline projection (54) and is attached thereto, this gearbox forks (55) is by the control of the gear change hand lever (25) on the body handrail (23), and output gear wheels (56) are installed in the mouth of variable shaft (57) and link to each other with gear drive (58).

5, according to claim 1 or 2 or 4 described miniature walking tractors, it is characterized in that:

1. ploughing mechanism (60) is by two-way colter (61), plough seat (63), plow bracket (64) constitutes, plow bracket (64) is a convex door frame, be sleeved on the preceding outside of body front axle bracket (12), and the kink and the plough depth on the afterbody of passing through two body side frames are located regulating tank (65), link to each other with main shaft adapter plate (3) with body front axle bracket (12) respectively with attaching parts, plow bracket (64) framework front upper part is a hypotenuse, plough seat (63) is connected in the framework top, two-way colter (61) is fixed on plough seat (63) and the plow bracket (64) by attaching parts, and the two movable leaves (62) on its top link to each other with two plough joysticks (29) respectively;

2. rotary tillage mechanism (66) is made of the rotary blade more than two, every rotary blade (61) is installed on the tool rest that body deploying and retracting axis (13) opened with attaching parts.

6, miniature walking tractor according to claim 5 is characterized in that:

1. the left side of transport systems (67), right wheel connecting panel (73), be inverted "L" shaped, long limit one end links to each other with body deploying and retracting axis (13) by bearing, the kink cover is connected on the axle (19), the minor face end has handrail location regulating tank (15), adjustable be connected in the axle (19) two ends handrail (23) just, the one upright abutment sleeve (69) that makes progress is arranged on the brace of vehicle frame (68) back, latch under shelf (75) after cross member can insert wherein, back train comprises wheel (71) and wheel front fork (72), this front fork (72) is the motor bike front fork, and braking mechanism comprises brake treadle (77) and brake disc (78);

2. connecting body main shaft (2) has chain cover (18) to seal with chain drum (16), the chain (17) of deploying and retracting axis (13) are outer;

3. change-speed box (48), the outer casing (49,59) that all is covered with of gear drive (58) seal.