CN205694228U - Sugarcane planting machine - Google Patents

Abstract

The utility model discloses a kind of sugarcane planting machine, include vehicle frame, vehicle frame is provided with hanger bracket in front portion, is provided with plough system assembly between two front-wheels, is provided with and fills band lay on roller, is respectively communicated with fertilising bucket and sugarcane kind hopper that plough is assembly on vehicle frame；Being provided with drive system in hopper front, drive system includes that tilting is the sugarcane kind chute above assembly at plough, and sugarcane kind chute is contained on vehicle frame by tilted supporter, equipped with upper cylinder and the bottom roll being surrounded with conveyer belt on tilted supporter；The lower roller bearing of bottom roll is connected with transmission shaft driven by the second chain Chain conveyer, and power transmission shaft is in transmission connection by the wheel shaft of the first Chain conveyer with front-wheel；Lower roller bearing is in transmission connection with transition axis by the 3rd Chain conveyer, and transition axis is connected with the rotating shaft transmission being located at fertilising bucket exit emptying auger by the 4th Chain conveyer.Than prior art, this utility model has several functions such as ditching into ridge, drip irrigation pipe laying, fertilising, pre-earthing, plantation, pesticide spraying, earthing, compacting.

Description

Sugarcane planting machine

Technical field

This utility model relates to a kind of sugarcane planting machine manufacturing technology field, a kind of Caulis Sacchari sinensis for pre-cut kind formula Planting machine.

Background technology

Current cane planting major part is carried out by artificial or semi-automatic planting machine, and artificial growth efficiency is the lowest.And half Although automatic planter also is able to integrated for multiple steps and one, and then improves efficiency.But it is in addition to tractor driver, semi-automatic Planting machine also needs to manually carry out sugarcane kind feeding, and the application rate operation artificial with uniformity and feeding is closely related, due to work Intensity is big, easily tired, somewhat diverts attention and may result in uneven sowing, and the phenomenons such as broadcast leakage is serious generally require artificial secondary and reseed； Complete machine sugarcane kind lift-launch amount is little simultaneously, needs frequently to supplement.

Utility model content

Technical problem to be solved in the utility model be to provide one have ditch into ridge, drip irrigation pipe is laid, fertilising, pre- The sugarcane planting machine of the several functions such as earthing, plantation, pesticide spraying, earthing, compacting.

This utility model solves the technical scheme that used of technical problem: this sugarcane planting machine include being provided with front-wheel and The vehicle frame of trailing wheel, described vehicle frame is provided with hanger bracket in front portion, is provided with plough system assembly, at described vehicle frame between two described front-wheels Being provided with filling band lay on roller, the fertilising bucket being respectively communicated with described plough system assembly and sugarcane kind hopper, described sugarcane kind hopper includes by turning over The portable hopper of rotaring cylinder driving and the stationary hopper adjacent with described portable hopper；It is provided with transmission in described stationary hopper front System, described drive system includes tilting sugarcane kind chute above described plough system assembly, and described sugarcane kind chute passes through tilted supporter It is contained on described vehicle frame, equipped with upper cylinder and the bottom roll being surrounded with conveyer belt on described tilted supporter；The lower rolling of described bottom roll Axle is connected with transmission shaft driven by the second chain Chain conveyer, and described power transmission shaft is passed by the wheel shaft of the first Chain conveyer with described front-wheel It is dynamically connected；Described lower roller bearing is in transmission connection with transition axis by the 3rd Chain conveyer, and described transition axis passes through the 4th Chain conveyer and sets Rotating shaft transmission at described fertilising bucket exit emptying auger connects.

In above-mentioned sugarcane planting machine technical scheme, more specifically technical scheme is it may also is that before described plough system assembly includes End is provided with the link of colter, and described link is respectively arranged with front moldboard and rear moldboard in its both sides, at two pieces of described rear ploughs Being provided with central authorities' moldboard between plate, every piece of described rear moldboard is equipped with one piece of pre-trailing bar turned forward on lateral wall；Institute State central authorities moldboard rear be provided with a press wheel, be provided with at moldboard rear rear every piece described one circle rake, two described circle rake and Described press wheel is each provided on support, and described support is contained on installing rack by being coated with the screw rod of spring, described installing rack with Two pieces of described rear moldboards are connected；Drip irrigation zone lay pipe it is provided with, described in two pieces between described front moldboard and described rear moldboard The fertilising pipe connected with described emptying auger it is provided with between rear moldboard.

Further: described portable hopper passes through hinge on described vehicle frame；Described stationary hopper is provided with in bottom Adjacent described portable hopper and the swash plate of described conveyer belt, described stationary hopper is provided with for limiting described portable hopper in sidewall The limit for height hurdle of upset.

Further: in the lay pipe of described drip irrigation zone, to be provided with multipair roller, in described drip irrigation zone lay pipe and described filling It is provided with circular beam between band lay on roller.

Further: on described conveyer belt, to be arranged at intervals with polylith scraper plate；The upper roller bearing of described upper cylinder passes through screw rod It is contained on described tilted supporter.

Further: described trailing wheel is contained on described vehicle frame by trailing wheel installing rack, described trailing wheel installing rack is provided with perpendicular Straight jointed shaft, the axle bed of described jointed shaft is arranged on to be erect on the installing plate arranged, and described installing plate passes through elongated hole and bolt It is connected on described vehicle frame；Described installing plate position above described trailing wheel installing rack is hinged with chuck, described chuck non- Hinged end is provided with the bearing pin that a setting is arranged, described trailing wheel installing rack in the axis hole that is arranged right below of described bearing pin, described after Being vertically arranged with an oil cylinder on wheel installing rack, the upper end of described oil cylinder connects the non-articulated end of described chuck；Described bearing pin is in institute Stating the one piece of dividing plate that partially passes through under chuck, described bearing pin part under described dividing plate is provided with and protrudes from described bearing pin Pressing plate, is provided with spring between described dividing plate and described pressing plate.

Further: the wheel shaft of described front-wheel is contained on front-wheel link, described front-wheel link is connected by front bearing pin Described vehicle frame, has an adjusting screw rod to connect protruding upward partly and institute of described front-wheel link by the bulb joint at its two ends That states vehicle frame protrudes upward part.

Further: described hanger bracket includes the swing span of horizontally set, it is arranged on the middle frame on rear side of described swing span, Being provided with support seat at described middle frame two ends, described support seat is provided with pin joint axle and is connected with described vehicle frame；Described middle frame Rear side is provided with axle bed, and the centre of described swing span is provided with one and crosses described swing span and described middle frame and described axle bed Middle bearing pin.

The front of this utility model indication is the direction that colter moves ahead.

Owing to have employed technique scheme, this utility model compared with prior art has the advantages that 1, this Multiple operations during cane planting are integrated by sugarcane planting machine, and operate and can be dragged in driving by tractor driver one people Completing during machine drawing, automaticity is high, and the plantation amount of sugarcane kind, seed spacing uniformly, will not be with the changes of speed simultaneously And change；2, this machine disposably can carry substantial amounts of sugarcane kind and related fertilizer, pesticide, improves efficiency and reduces cost.

Accompanying drawing explanation

Fig. 1 is the structural representation of this utility model embodiment.

Fig. 2 is the operating diagram of this utility model embodiment.

Fig. 3 is the structural representation of the drive system of this utility model embodiment.

Fig. 4 is the structural representation of the plough system assembly of this utility model embodiment.

Fig. 5 is the scheme of installation of the trailing wheel of this embodiment.

Fig. 6 is the scheme of installation of the front-wheel of this embodiment.

Fig. 7 is the structural representation of the hanger bracket of this embodiment.

Fig. 8 is the structural representation of this embodiment hanger bracket bearing pin.

Fig. 9 is the scheme of installation of this embodiment hanger bracket.

Detailed description of the invention

Sugarcane planting machine as depicted in figs. 1 and 2 includes the vehicle frame 8 equipped with front-wheel 3 and trailing wheel 9, front-wheel as shown in Figure 6 3, the wheel shaft 3-1 of front-wheel 3 is contained on front-wheel link 3, and front-wheel link 3-3 passes through front bearing pin 3-4 connecting vehicle frame 8, has a tune Joint screw rod 3-5 connects protruding upward partly of front-wheel link 3-3 and protruding upward of vehicle frame 8 by the bulb joint at its two ends Part.Adjusting screw rod 3-5 tilts to install.During work, pass through between vehicle frame 8 and front-wheel link 3-3 according to the height in soil Relatively rotate, make the length of adjusting screw rod 3-5 change, to change the relative altitude of front-wheel 3 and vehicle frame 8, and then change Caulis Sacchari sinensis kind Plant the planting depth of machine, improve the effectiveness of plantation efficiency and plantation.Trailing wheel 9 as shown in Figure 5, trailing wheel 9 is installed by trailing wheel Frame 9-13 installs on carriage 8, and trailing wheel installing rack 9-13 is provided with vertical jointed shaft 9-12, and the axle bed of jointed shaft 9-12 is installed Erectting on the installing plate 9-11 arranged, installing plate 9-11 is connected to vehicle frame 8 by the elongated hole 9-2 on vehicle frame 8 and bolt 9-3 On, the distance between two trailing wheels 9 can be adjusted, after determining the Planting Row Distance of Caulis Sacchari sinensis, the installation site adjusting trailing wheel 9 can make The wheelspan of two groups of trailing wheels 9 is equal with Planting Row Distance.Installing plate 9-11 position above trailing wheel installing rack 9-13 is hinged with chuck The non-articulated end of 9-4, chuck 9-4 be provided with one setting arrange bearing pin 9-6, trailing wheel installing rack 9-13 in bearing pin 9-6 just under Side is provided with axis hole 9-10, and trailing wheel installing rack 9-13 is vertically arranged with an oil cylinder 9-5, and the upper end of oil cylinder 9-5 connects chuck 9-4's Non-articulated end.When carrying out the plantation of Caulis Sacchari sinensis straight line, it is inserted in the axis hole 9-10 of trailing wheel trailing wheel installing rack 9-13 with locking bearing pin 9-6 In, making trailing wheel installing rack 9-13 and installing plate 9-11 to relatively rotate and i.e. lock trailing wheel, tractor linear rows followed by planting machine Sail；The upper end of oil cylinder 9-5 connects the non-articulated end of chuck 9-4, when tractor and planting machine need to turn to, handles oil cylinder 9-5 Rising the non-articulated end of chuck 9-4, bearing pin 9-6 is extracted in the axis hole 9-10 of trailing wheel trailing wheel installing rack 9-13, trailing wheel can be around The bearing pin 9-12 of installing plate 9-11 rotates, it is achieved universal wheel state, can carry out each angle rotation according to turning to of tractor, real Existing minor radius revolution, is effectively increased plantation efficiency in the place of working region relatively narrower.Bearing pin 9-6 is under chuck 9-4 Partially passing through one piece of dividing plate 9-7, bearing pin 9-6 part under dividing plate 9-7 is provided with the pressing plate 9-9 protruding from bearing pin 9-6, dividing plate Spring 9-8 is installed between 9-7 and pressing plate 9-9.Deng tractor and planting machine complete to turn to be again introduced into straight line plantation time, handle The upper end of oil cylinder 9-5 declines, and drives bearing pin 9-6 to decline, and once trailing wheel 9 straightens, i.e. bearing pin 9-6 is directed at trailing wheel trailing wheel installing rack 9- 13 axis hole 9-10 time, under the effect of spring 9-8, bearing pin 9-6 is automatically into axis hole 9-10, thus locks trailing wheel, and trailing wheel is only Energy straight-line travelling, thus improve the efficiency of cane planting.

In the front portion of vehicle frame 8 equipped with hanger bracket 1, hanger bracket 1 as shown in Figure 7, Figure 8 and Figure 9 includes the pendulum of horizontally set Moving frame 1-1, is arranged on the middle frame 1-3 on rear side of swing span 1-1, supports seat 1-3-1 being provided with of middle frame 1-3 two ends, supports Seat 1-3-1 is provided with pin joint axle 1-7 and is connected with vehicle frame 8, make whole hanger bracket 1 can along the axis direction of pin joint axle 1-7 relative to Vehicle frame 8 relatively rotates.Being provided with axle bed 1-3-2 on rear side of middle frame 1-3, the centre of swing span 1-1 is provided with one and crosses swing Frame 1-1 and the middle bearing pin 1-2 of middle frame 1-3 axle bed 1-3-2, middle bearing pin 1-2 is fastened by bolts, can be by itself and swing span 1- 1 fixing makes both become an entirety, swing span 1-1 and middle frame 1-3 can along in the axis direction of bearing pin 1-2 relatively rotate, Amplitude of fluctuation can be unrestricted, solves the excessive problem causing damage of components of amplitude of fluctuation.Swing span 1-1 two ends set There are a pair clamping plate 1-4, every couple of clamping plate 1-4 to be connected by connecting bolt 1-5, between every couple of clamping plate 1-4, are provided with bolt sheath 1-6, Bolt sheath 1-6 keeps the gap between swing span 1-1 and clamping plate 1-4, it is to avoid clamping plate 1-4 installs tension and makes swing span 1-1 And cannot relatively rotate smoothly between middle frame 1-3, and play spacing effect when swing span 1-1 rotates, it is to avoid pendulum Moving frame 1-1 directly clashes into connecting bolt 1-5.Middle bearing pin 1-2 is externally provided with self lubrication bearing 1-8, self lubrication bearing 1-8 and middle frame The axle bed 1-3-2 of 1-3 is combined by interference fit, and middle bearing pin 1-2 rear end is provided with axle end baffle plate 1-9, self lubrication bearing 1-8 and uses Interference fit is installed in the axle bed 1-3-2 of middle frame 1-3, it is to avoid when rotating between middle bearing pin 1-2 and middle frame 1-3 because of Dry friction causes middle bearing pin 1-2 to damage；Axle end baffle plate 1-9 is fixed on the rear axle head of middle bearing pin 1-2, is possible to prevent granule bigger Impurity invade on faying face between bearing pin 1-2 and self lubrication bearing 1-8.

Equipped with plough system assembly 4 on vehicle frame 8 between two front-wheels 3, plough system assembly as shown in Figure 4 include front end equipped with The link 4-15 of colter 4-1, colter 4-1 are arranged on link front end by flat head screw；At link 4-15 frame body Both sides are respectively symmetrically and are provided with front moldboard 4-2 and rear moldboard 4-6, and the front end of front moldboard 4-2 is hinged on link 4-by hinge On 15, the rear end of front moldboard 4-2 tilts backwards and is contained in link 4-15 by connecting rod 4-3 activity, can be by moldboard before regulation 4-2 rear end sets the angle of front moldboard 4-2 and the oblique angle of link 4-15 frame body with the link position of connecting rod 4-3；Plough after two pieces Plate 4-6 is set in parallel with link 4-15 frame body respectively, is provided with central authorities moldboard 4-5, after every piece after two pieces between moldboard 4-6 Moldboard 4-6 is respectively arranged with the pre-trailing bar 4-4 that one piece of front end turns forward on lateral wall；It is provided with one at central authorities moldboard 4-5 rear Individual press wheel 4-10, after every piece, moldboard 4-6 rear is provided with a circle rake 4-7, and a two circle rake 4-7 and press wheel 4-10 are equal Being contained on support 4-9, each circle rake 4-7 is connected with support 4-9 by wheel carrier 8, press wheel 4-10 by suppress wheel carrier and Support 4-9 connects；This support 4-9 is contained on installing rack 4-13 by being coated with the screw rod 4-12 of spring 9-8-11, installing rack 4- The two ends of 13 are connected with moldboard 4-6 after two pieces respectively by bolt；Link between front moldboard 4-2 and rear moldboard 4-6 4-15 is equipped with drip irrigation zone lay pipe 4-14, equipped with multipair roller 4-14-1 on the lay pipe 4-14 of drip irrigation zone, so that drip irrigation zone 2-1 Lay between adjacent rollers 4-14-1, and only rolling friction in laid course and between roller 14, it is to avoid drip irrigation zone 2-1 Scratched；It is welded in central authorities' plough equipped with fertilising pipe 4-16, the two root fertilizer pipe 4-16 of the present embodiment between moldboard 4-6 after two pieces After two pieces of plate 4-5 front between moldboard 4-6.Link 4-15 is arranged on the vehicle frame 8 of planting machine by bolt；At vehicle frame 8 On equipped with filling band lay on roller 2, to be respectively communicated with plough be fertilising bucket 6 and the sugarcane kind hopper 10 of assembly 4；Sugarcane kind hopper 10 includes by overturning Portable hopper 10-1 that cylinder 7 drives and the stationary hopper 10-2 that connects with this portable hopper 10-1；Portable hopper 10-1 passes through pin Axle 10-4 is hinged on carriage 8；Stationary hopper 10-2 in bottom equipped with one piece of adjacent portable hopper 10-1 and conveyer belt 5-15 Swash plate 10-3, in stationary hopper 10-2 sidewall equipped with one piece for restraint hopper 10-1 upset limit for height hurdle 12, permissible Avoid too much sugarcane kind that weight is all pressed on scraper plate 5-7, strengthen power and the loss of conveyer belt 5-15；When fixing material above When in bucket 10-2, residue sugarcane kind is less, the sugarcane kind 11 in bucket is dumped forward by lifting portable hopper 10-1, it is ensured that at the bottom of stationary hopper Sugarcane kind on portion swash plate 10-3 is sufficient.Equipped with drive system 5 on the vehicle frame 8 in stationary hopper 10-1 front.

When planting operation and starting, 1 front-wheel 3 of tractors hanger bracket is placed on ground, and colter 4-1 then cuts soft Soil in；Tractor-drawn plough is that assembly 4 outputs ditch ridge.The wheel shaft 3-1 of front-wheel 3 drives transmission by the first Chain conveyer 5-6 Axle 5-8 rotates, and power transmission shaft 5-8 drives bottom roll 5-14 to rotate by the second chain Chain conveyer 5-9, conveyer belt 5-15 and scraper plate 5-7 Sugarcane kind is swept and is sent in sugarcane kind chute 5-2, then be slipped to the groove in soil from sugarcane kind chute 5-2；And lower roller bearing 5- 10 drive transition axis 5-12 to rotate by the 3rd Chain conveyer 5-11, and transition axis 5-12 drives fertilising bucket by the 4th Chain conveyer 5-13 The rotating shaft 6-2 of emptying auger rotates, and can be transported in soil groove by fertilizer, complete work of applying fertilizer at fertilising bucket emptying auger Sequence.For avoiding some fertilizer burn sugarcane kind, a small amount of soil can be covered on fertilizer by pre-trailing bar 4-4.Circle rake 4-7 is by both sides pine Soft soil ploughs under bottom of trench, and covers sugarcane kind 11, and soft soil is then compacted by press wheel 4-10 subsequently, it is to avoid soil Excessive water in earth runs off.Wheel shaft 5-1 and lower roller bearing 5-10, the rotating shaft 6-2 of fertilising bucket emptying auger 6-1 due to front-wheel 3 Form fixing speed ratio by chain drive, make application rate and dose uniformity, change this speed according to plantation demand simultaneously Ratio.

Claims (8)

1. a sugarcane planting machine, including being provided with the vehicle frame (8) of front-wheel (3) and trailing wheel (9), described vehicle frame (8) is provided with in front portion Hanger bracket (1), is provided with plough system assembly (4) between two described front-wheels (3), it is characterised in that: it is provided with on described vehicle frame (8) The fertilising bucket (6) fill band lay on roller (2), being respectively communicated with described plough system assembly (4) and sugarcane kind hopper (10), described sugarcane kind hopper (10) include by overturning portable hopper (10-1) and the stationary hopper adjacent with described portable hopper (10-1) that cylinder (7) drives (10-2)；Be provided with drive system (5) in described stationary hopper (10-1) front, described drive system (5) includes tilting described Sugarcane kind chute (5-2) of plough system assembly (4) top, described sugarcane kind chute (5-2) is contained in described vehicle frame by tilted supporter (5-1) (8) on, equipped with upper cylinder (5-5) and the bottom roll (5-14) being surrounded with conveyer belt (5-15) on described tilted supporter (5-1)；Described The lower roller bearing (5-10) of bottom roll (5-14) is in transmission connection with power transmission shaft (5-8) by the second chain Chain conveyer (5-9), described transmission Axle (5-8) is in transmission connection by the wheel shaft (3-1) of the first Chain conveyer (5-6) with described front-wheel (3)；Described lower roller bearing (5-10) is led to Crossing the 3rd Chain conveyer (5-11) to be in transmission connection with transition axis (5-12), described transition axis (5-12) passes through the 4th Chain conveyer (5-13) It is in transmission connection with the rotating shaft (6-2) being located at described fertilising bucket (6) exit emptying auger (6-1).

Sugarcane planting machine the most according to claim 1, it is characterised in that: described plough system assembly includes that front end is provided with colter (4-1) link (4-15), described link (4-15) is respectively arranged with front moldboard (4-2) and rear moldboard (4-in its both sides 6), being provided with central authorities' moldboard (4-5) between two pieces of described rear moldboards (4-6), every piece of described rear moldboard (4-6) is equal on lateral wall It is provided with one piece of pre-trailing bar (4-4) turned forward；It is provided with a press wheel (4-10) at described central authorities moldboard (4-5) rear, Circle rake (4-7), two described circle rake (4-7) and described press wheel (4-it are provided with at moldboard (4-6) rear rear every piece described 10) being each provided on support (4-9), described support (4-9) is contained in installing rack by being coated with the screw rod (4-12) of spring (4-11) (4-13), on, described installing rack (4-13) rear moldboard (4-6) described with two pieces is connected；Described front moldboard (4-2) with described It is provided with drip irrigation zone lay pipe (4-14) between rear moldboard (4-6), is provided with and described discharging between two pieces of described rear moldboards (4-6) The fertilising pipe (4-16) that screw feeder (6-1) connects.

Sugarcane planting machine the most according to claim 1, it is characterised in that: described portable hopper (10-1) passes through bearing pin (10- 4) it is hinged on described vehicle frame (8)；Described stationary hopper (10-2) is provided with adjacent described portable hopper (10-1) and institute in bottom Stating the swash plate (10-3) of conveyer belt (5-15), described stationary hopper (10-2) is provided with for limiting described portable hopper in sidewall (10-1) the limit for height hurdle (12) overturn.

Sugarcane planting machine the most according to claim 2, it is characterised in that: it is provided with in described drip irrigation zone lay pipe (4-14) Multipair roller (4-14-1), is provided with circular beam (2-between described drip irrigation zone lay pipe (4-14) and described filling band lay on roller (2) 2).

5. according to the sugarcane planting machine described in claim 1 or 2 or 3, it is characterised in that: at the upper interval of described conveyer belt (5-15) It is provided with polylith scraper plate (5-7)；The upper roller bearing (5-4) of described upper cylinder (5-5) is contained in described tilted supporter by screw rod (5-3) (15-1) on.

Sugarcane planting machine the most according to claim 5, it is characterised in that: described trailing wheel (9) passes through trailing wheel installing rack (9- 13) being contained on described vehicle frame (8), described trailing wheel installing rack (9-13) is provided with vertical jointed shaft (9-12), described jointed shaft (9-12) axle bed is arranged on to be erect on the installing plate (9-11) arranged, and described installing plate (9-11) passes through elongated hole (9-2) and spiral shell Bolt (9-3) is connected on described vehicle frame (8)；Described installing plate (9-11) is in the position hinge of described trailing wheel installing rack (9-13) top Being connected to chuck (9-4), the non-articulated end of described chuck (9-4) is provided with the bearing pin (9-6) that a setting is arranged, and described trailing wheel is installed Frame (9-13) is arranged right below axis hole (9-10) in described bearing pin (9-6), and described trailing wheel installing rack (9-13) is vertically arranged Having an oil cylinder (9-5), the upper end of described oil cylinder (9-5) connects the non-articulated end of described chuck (9-4)；Described bearing pin (9-6) in One piece of dividing plate (9-7), the described bearing pin (9-6) portion under described dividing plate (9-7) is partially passed through under described chuck (9-4) It is arranged with the pressing plate (9-9) protruding from described bearing pin (9-6), between described dividing plate (9-7) and described pressing plate (9-9), bullet is installed Spring (9-8).

Sugarcane planting machine the most according to claim 6, it is characterised in that: the wheel shaft (3-1) of described front-wheel (3) is contained in front-wheel On link (3-3), described front-wheel link (3-3) connects described vehicle frame (8) by front bearing pin (3-4), has an adjusting screw rod (3-5) part and described vehicle frame (8) are protruded upward by what the bulb joint at its two ends connected described front-wheel link (3-3) Protrude upward part.

Sugarcane planting machine the most according to claim 7, it is characterised in that: described hanger bracket (1) includes the pendulum of horizontally set Moving frame (1-1), is arranged on the middle frame (1-3) of described swing span (1-1) rear side, being provided with of described middle frame (1-3) two ends Supporting seat (1-3-1), described support seat (1-3-1) is provided with pin joint axle (1-7) and is connected with described vehicle frame (8)；Described middle frame (1-3) rear side be provided with axle bed (1-3-2), the centre of described swing span (1-1) be provided with one cross described swing span (1-1) and The middle bearing pin (1-2) of described middle frame (1-3) and described axle bed (1-3-2).