CN1033917C

CN1033917C - Machine for stamping coal mixtures for coking

Info

Publication number: CN1033917C
Application number: CN87108045A
Authority: CN
Inventors: 巴哈·罗贝尔; 葛哈舍·露斯; 麦莱·昂德赫
Original assignee: Charbonnages de France CDF
Current assignee: Charbonnages de France CDF
Priority date: 1986-11-26
Filing date: 1987-11-26
Publication date: 1997-01-29
Anticipated expiration: 2002-11-26
Also published as: DE3779076D1; PL148488B1; CN87108045A; CN1074472A; IN170405B; RU1831493C; PL269049A1; EP0272957A1; UA12329A; EP0272957B1

Abstract

This machine, consisting of a number of unit tampers which are attached to each other and each of which carries a number of rams (6) has a total length shorter than the length of the tamping caisson of the value of a movement stroke (C), all the rams being separated by a uniform distance (E1) at least equal to the said stroke (C) so that the alternating movement of the machine with this stroke (C) provides the tamping of the coal over the whole length of the tamping caisson, the rams being additionally braked and stopped, when necessary, by a device with rollers of the free-wheel type in the direction of the rise of the ram, with automatic action.

Description

The machine that is used for the coal mixtures that tamping coking uses

The mixture that the present invention relates to a kind of coal of tamping automatically (perhaps other components) is to make the machine of the coal base that is placed on the tamping of being smelt coke in the pit kiln.

This class machine has become known and has been used for coal mixtures is compressed into mould or smash box.For example, a kind of method and apparatus of smashing coking coal with beater is disclosed in the No.7608967 french patent application.It is short that the length ratio of this device is smash box, and beater is vertically arranged equally spacedly along smashing box, uses hydro-pump to drive balladeur train and vertically move back and forth along beater.In the device of conventional structure, pulverized coal mixture is poured mould into from the end face of mould, then, has one by at least one and is enhanced the beater compacting that the hammer boots on the compacted coal of need are knit in free-falling then continuously earlier.It is narrow to smash box, and its width is substantially equal to the width of the hammer boots of each beater.Each smashes box is elongated.In existing machine, a plurality of beaters are arranged along smashing vertically being fixed on abreast on the travelling bridge of box.This bridge moves along the whole length of smashing box in the beater working process.This bridge moves one and smashes distance each time, and this smashes apart from the hammer boots length that is greater than or less than on travel direction.Like this, rely on beater to do moving of this mode with travelling bridge, coal the length direction of smashing box have a few and all finish tamping through pounding.

Each beater comprises that has the bar of vertical arrangement that the two sides has been coated with the web of great friction coefficient coating.This web at first be clamped in two by lifting device rotate over against offset cam in, next is sandwiched in two relative members of braking and holding device.

Revolve at every turn and turn around, offset cam grips the web of bar and promotes it and moves up, then, discharges web by its free-falling.Like this, offset cam whenever turns around, and said fixing once pounds at the hammer boots of the bottom of bar.If a plurality of beaters are adjacent one another are, all bars are not done vertical movement simultaneously, so that the average mechanical stress of machine in the whole time.

The offset cam of each beater is by a transmitting gear driven rotary, and this transmitting gear is driven by the take-off (propeller) shaft of electric motor driven deceleration roller box.

The conventional structure of above-described gravity stamp has produced several shortcomings, in the use important disadvantages this be owing to smash, make that pounding the whole surface that is contained in the coal of smashing in the box needs a large amount of time apart from bigger.

Main purpose of the present invention is to provide a kind of gravity stamp with the new structure that can reduce the time of pounding in a large number; In addition, carry out in one short period although only pound, secondary objective of the present invention is to improve the quality that pounds, particularly about pounding density and homogeneity.

Attached purpose of the present invention is to provide a kind of and reduces the expense of making and keeping in repair gravity stamp and make that pounding the operation fully automated becomes the simple structure of possible strong yet.

In conventional gravity stamp, thereby the device that is used to brake each beater has two two sides that are fixed on the web of described hammer stem each other over against the jaw jaw that constitutes relative braking element.

If offset cam usually with the speed rotation in one week of per second, just is difficult to make the clamping of tripping pawl and unclamps motion and match with the motion of cam.And jaw is preferably in the speed of upwards returning mobile beater and dropped to moment of zero be clipped on the web of beater before beater begins to fall once more.Special in friction and wear, offset cam is not always upwards thrown beater with same speed.The result is that institute's elapsed time changed till the retum speed that makes progress from offset cam release beater to beater dropped to zero.

As a result, complexity fixes with expensive machinery and controls tripping pawl even adopt, and jaw also can wear and tear quickly even destroy the coating that has great friction coefficient on the web.

And, take away when needs and to smash box and when making gravity stamp shift out the position, each beater must be referred a high or immobilized height.At this moment just used tripping pawl.After offset cam is thrown beater up and is discharged it, be clamped between the tripping pawl by web hammer stem, prevented that beater from dropping down, when offset cam is clamped the web of hammer stem once more so that these jaws have unclamped again when once more it upwards being thrown.Beater is clamped by jaw after being discharged by cam firmly.The ballistic process that continues to make progress repeats to reach up to beater its extreme higher position.There, beater is clamped securely up to smashing the expansion machine and is used once more.

Thereby, be starved of braking of equipment and holding device on such as the gravity stamp device that has improved of the present invention, this device does not need to carry out very difficult cooperating with the motion of offset cam, and itself does not cause destruction or overwear vt. to friction coatings on the beater.

The machine of the coal mixtures that tamping coking of the present invention is used pounds having smashing in the box of length L, and this machine comprises is a plurality ofly smashing box vertically with roughly constant spacing (E ₁) beater that splits, each beater comprises that one is being smash the box longitudinal stretching and having the second length (l ₂) the hammer boots, described machine can smash box vertically significantly to move repeatedly less than the displacement interval of smashing box length (L) (C), described machine has also been equipped the displacement drive member that is used in smashing vertical the above displacement interval (C) of box to-and-fro movement being passed to machine, described machine comprises a plurality of simple gravity stamps, each simple gravity stamp comprises that one is being smash the box lateral extent and is being contained in chassis on the wheel, the chassis is loaded with a beater at least, its working component is at least on a fabrication line, described simple gravity stamp connects successively to be set up one and pounds chain and to constitute gravity stamp overall, wherein, in every simple gravity stamp and between the simple gravity stamp of successive, fabrication line all separates one and is approximately equal to described distance (E ₁) spacing, displacement interval (C) is substantially equal to spacing (E ₁) partly, the second length (l of hammer boots ₂) be substantially equal to spacing (E ₁) partly.

In an embodiment of gravity stamp of the present invention, a plurality of simple gravity stamps are arranged, each gravity stamp comprises that extends to a whole wheel-mounted chassis of smashing box, and has a beater, its work motor is in and passes at least one fabrication line smashing box.Simple gravity stamp links up one by one to have formed and pounds chain, and its total length is substantially equal to the length of smashing box and deducts a displacement interval, and the distance of described continuous fabrication line between adjacent two is roughly constant simultaneously; The hammer boots of each beater have with the roughly the same length of other hammer boots; In addition,, on a simple stamper, be furnished with a hinge point in order to be used to drive the member that pounds chain, described member also by link a point of fixity and can to-and-fro movement pass to smash box vertically on spread all over the described chain that pounds of a displacement interval.

In one embodiment of the invention, each simple stamper has been equipped with a plurality of beaters, for example four, and, the offset cam that connects described beater is installed in each opposite side of the hammer stem of each beater, and be fixed on one first common drive shaft and one second common drive shaft, these two common drive shaft are interconnected by a plurality of bearings and by rotary actuator by the chassis, simultaneously, the chassis of each simple gravity stamp has an electric motor, and this electric motor is connected with the single step down gear transmission mechanism that links to each other with a common drive shaft successively.

Advantageously because the braking and the relative member of holding device are installed in the two sides of web of the vertical hammer stem of described beater, comprise the relative cylinder of two profile types with this device that each beater links together, this cylinder can freely rotate on the direction that beater moves up, and has and prevent the device that rotates in the opposite direction.When the referred higher rest position of beater, the cylinder of described employing preferably has equal pressure to the surface of beater web.

Two cylinders preferably are contained in first end of two levers, and simultaneously, the second relative end of described lever is subjected to being used for cylinder is pressed in the effect of the clamping components on the web.

Preferably only adopt a clamping components, second terminal connection of this member and a lever wherein, and act on described lever simultaneously in the opposite direction.

Wherein the biasing of second terminal portions of a lever is parallel to another lever, and clamping components is resilient answer member; In addition, in order when needed cylinder to be moved apart web, be connected a transmission mechanism abreast with described elastic component between lever, this is more favourable.

Below will nonrestrictively make a presentation for example and with reference to the preferred embodiment of accompanying drawing by doing gravity stamp of the present invention, wherein:

Fig. 1 be the first simple gravity stamp simplification overall design drawing and the part of the second simple gravity stamp that is connected the first simple gravity stamp, these two simple gravity stamps have been formed the part according to gravity stamp of the present invention;

Fig. 2 is at the layout diagram of smashing one group of beater on the box length.

Fig. 3 is the general front view of the top end part of beater, and it has been formed the part of gravity stamp shown in Figure 1 and has shown the unillustrated device that is used to brake and keep beater in Fig. 1;

Fig. 4 is the front view that drift stop shown in Figure 3 has amplified.

Among the more excellent embodiment that is described below, gravity stamp comprises four simple gravity stamps 1, and the length of each equals to smash 1/4th (having considered that each pounds the gap of step pitch, as described below) of box length.

Each simple gravity stamp 1 has the firm chassis 2, the travel mechanism 3 that are installed on the wheel, and this makes it to smash above the box and to move along the rail of its longitudinal extension being supported in.

In the known mode of routine, chassis 2 at the width transversely of smashing box greater than the described width of smashing box, thereby reserve local so that various equipments to be installed.Below describe only to relate to pound to be in the zone and involve those things of smashing above the box of the present invention at each.

Chassis 2 is being supported in Fig. 1 and is partly being cut open to show the platform 4 of travel mechanism 3.

Fabrication line

5A, 5B, 5C and 5D by the long and short dash line representative among the figure are arranged on the platform.These fabrication lines from 5A to 5D are parallel to each other and to smash box when top phase butt ramming box transversely arranged when simple gravity stamp 1 is contained in.These lines from 5A to 5D are mutually equidistant and by a spacing E ₁Separate.To the every fabrication line of 5D a beater 6 is installed at 5A, beater itself can be any existing suitable type, thereby does not need to describe in detail.

In this example, beater 6 is a kind ofly to comprise one to have a vertical direction with the hammer boots (not shown in Figure 1) that extend transverse to first length of smashing box in its bottom be the hammer stem 7 of I shape, described first length is slightly less than the inner width of smashing box, the hammer boots have one along second length of smashing the box longitudinal extension, and at this in particular cases, second length be substantially equal between two successive beaters 6 apart from E ₁Half.Each vertical hammer stem 7 in the vertical direction is by two offset cams of facing 8 and 9 operations, and the web of bar is clamped in the middle of them.

The offset cam of all beaters 6 is contained on the common drive shaft, promptly installs on the transmission shaft 10 of cam 8 and installs on the transmission shaft 11 of cam 9.These two transmission shafts 10 and 11 are parallel to the respective face of hammer stem 7, along the longitudinal extension of smashing box.Isolating bearing 12A, the 12B that they are supported by a plurality of chassis 2 ... with 13A, 13B ... support.Transmission shaft 10 connects the take-off (propeller) shaft 14 of step down gear transmission mechanism 15 so that rotation at the one end.Take-off (propeller) shaft 14 is a tubular shaft preferably, and an end of common drive shaft 10 penetrates wherein so that described rotation coupling to be provided.

The input shaft 16 of step down gear 15 has a belt pulley 17 that connects the belt pulley 18 of electric motor 19 by belt.Electric motor can be installed in the top of platform 4, perhaps also can be installed in its following place within chassis 2.The some gap E of every common drive shaft 10 and 11 between two beaters 7 ₁In a gear 20 or 21 are respectively arranged.These two gear diameters are identical and mesh together, thereby electric motor 19 has just driven common drive shaft 10 and 11 and the offset cam 8 and 9 of each beater 7 of simple gravity stamp 1 simultaneously.

In this example, the length of each simple gravity stamp approximately is to smash 1/4th of box length, and has adorned four beaters that are separated from each other 7 on the simple gravity stamp.Thereby, in order once all to cover the total length smash box, need four simple gravity stamps and connect successively and be placed in together on the length direction of smashing box with gravity stamp.Fig. 1 shown one first simple gravity stamp 1 and second simply smash ore deposit 1 ' a part, wherein can see with the first simple gravity stamp 1 in identical parts, and these parts add apostrophe ' indication by identical reference number.

When two simple gravity stamps connect together, last root fabrication line 5D of the first simple gravity stamp 1 and next simple gravity stamp 1 ' first fabrication line 5A ' between have one to equal spacing E ₁Or at least very near E ₁Gap E ₂E ₂With spacing E ₁Compare and allow little difference.

For the ease of connecting simple gravity stamp one by one, can make see from the top of the end on the chassis 2 of simple gravity stamp be trapezoid notch 22 and be identical shaped protrude in next simple stamper 1 ' the corresponding additional tongues 23 of end of chassis 2 ' not.Tongue 23 cooperates with notch 22, has guaranteed correct aligning, and has improved the connection between the simple gravity stamp.In addition, outward, simple gravity stamp is also coupled together securely by suitable conventional coupling device, and this is not shown in the drawings.

Simple gravity stamp 1,1 ' interconnection chain that forms has been formed gravity stamp of the present invention.Whole chain utilizes its travel mechanism 3 to locate easily.Drive member one for example Vulcan gear one is hinged on the simple gravity stamp point of fixity over there at the one end, and the other end is hinged on one of them simple gravity stamp, promptly on the gravity stamp 1.This transmission mechanism adopts traditional way to make and control so that the shift reciprocately motion is passed to and is smashing the gravity stamp of box on vertically.This moving forward and backward occurs in a stroke (distance between the just opposite limit position) the inside, and it is apart from E ₁Hammer the function of second length of boots into shape with each.

Fig. 2 be comprise by four

simple gravity stamps

1,1 ', 1 " and the connect together sketch of gravity stamp of the chain that forms of 1 , wherein every simple gravity stamp has four beaters that are positioned on

fabrication line

5A, 5B, 5C and the 5D.These straight lines are by the spacing E that equals 785mm ₁Separate.Between two adjacent fabrication line 5D of two adjacent simple gravity stamps and the 5A ' apart from E ₂Equal 790mm.Can allow the error of 5mm.At simple gravity stamp 1 " in the hammer boots of two beaters be shown in broken lines, as can be seen, its second length l ₂Approximate spacing E ₁Half.

The total length of gravity stamp is less than smashing the box total length with alphabetical L (12630mm) expression.Error is that spacing C has represented when working in beater is being smash box by needed slit e and spacing C are caused at two ends, and drive member can be passed to motion the round step pitch or the stroke of machine.In this example, the big or small C of step pitch is 400mm, just is slightly larger than spacing E ₁Half.Thereby, only by in that to equal on the spacing C of 400mm machine reciprocating,, smashing coal on the total length of box (12630mm) all by tamping except two end portions corresponding to slit e.The pound effect of two adjacent beaters on coal at a distance of 785mm has an overlap.Effectively and promptly pound like this.In addition, the displacement of the short step pitch inner control machine of 400mm is easy to realize automatization between known limits.For the each displacement along step pitch C, control comprises boost phase, constant rate period and a decelerating phase automatically.

Numeral above-mentioned provides by exemplifying mode.Spacing E ₁, beater second length l ₂Can change with the quantity of beater, as long as the numerical value of step pitch C keeps less and the overlap of the enough effect that pounds can be provided in the to-and-fro movement of gravity stamp.For this reason, as long as stay enough slits between two adjacent hammer boots, the hammer boots of beater can approach spacing E ₁Second length.

In either case, no matter gravity stamp is made on the monolithic chassis that covers whole designated length or by a plurality of simple gravity stamps that link together is formed, thereby gravity stamp can both mechanize can rely on self and not need the external displacement transmission mechanism to move along pounding step pitch.

The braking and the holding device of each beater are described referring now to Fig. 3 and Fig. 4.This device is not shown in Figure 1.It is installed in firm chassis 2 above, preferably be installed on the small-sized platform 24 of the convenient inlet that the parts that lead to described device are provided.Platform 24 is supported by the vertical lifting device (end illustrates) that connects chassis 2 itself.

In each beater 6 part shown in Figure 3, beater 6 vertically is installed between isolating in vertical direction two pairs of guide deflection sheaves 25 and 26.

In the vertical gap that is between guide deflection sheave 25 and 26, vertically the web 27 of hammer stem 7 pass by two

relative cylinder

28A and 28B form and the cylinder of part that constitutes drift stop to 28.Drift stop has a total reference number 29.

According to traditional way,

cylinder

28A or 28B are the flywheel types, can and comprise the device that prevents from self to rotate in the opposite direction a direction rotation.It can freely rotate when beater moves up.

One among cylinder 28A and the 28B is mounted freely on corresponding transmission shaft 30A or the 30B, thereby is sandwiched between the edge of hammer stem 7 and can be forced on the friction coatings 31 that is coated on web 27 each face.A component placement that is made of cylinder 28A and transmission shaft 30A is at first end (being the lower end in this example) of lever 32, lever 32 itself is as being pivotally mounted on the horizontal drive shaft 33 that is supported by platform 24, and extend perpendicular and stopping in this example as vertical second end.Another comprises first end or the bottom that is installed in lever 34 like the component class of cylinder 28B and transmission shaft 30B, and lever 34 is same as being pivotally mounted on the horizontal drive shaft 35 that is supported by platform 24.Lever 34 extends second end or the top that arrival tightly connects waling stripe 36 vertically upward.Connecting rod departs from beater 6 to avoid beater.Waling stripe 36 terminals have connected and have been parallel to the perpendicular ends part 37 that has second end or vertical lever 32.Distance between the perpendicular ends part 37 of lever 32 and connecting rod 36 is decided to be a suitable numerical value, so that these two parts are linked a clamping components, this member is reverse stretching device or return spring of an elasticity preferably, and it is by long and short dash line 38 expressions.Above-described arrangement is equivalent to second end of second end of lever 34 being replaced lever 32, thereby the end that makes these two levers toward each other, also makes

cylinder

28A and 28B toward each other simultaneously.Or rather, when the elasticity stretching device 38 that reverses trends towards lever 32 is shifted near the perpendicular ends part 37 of connecting rod 36, it also trends towards keeping

cylinder

28A and 28B to be pressed in all the time on the friction coatings 31 on the web 27 of hammer stem 7.

Pneumatic transmission device 39 and elastic stretching device 38 are connected between the perpendicular ends part 37 of lever 32 and connecting rod 36 abreast.When this transmission mechanism 39 stretches, just lever 32 is moved apart terminal portions 37, thereby being removed an enough big distance from web 27,

cylinder

28A and 28B make cylinder quit work.Pillar 40A and 40B will limit moving of

lever

32 and 34 respectively, thereby make

cylinder

28A and 28B reserve equal gap on web 27 both sides.Adopt this arrangement, when

cylinder

28A and 28B were clamped on the web 27 under stretching device 38 effects, even the hammer stem off-axis, cylinder also can automatically be aimed at the center of hammer stem 7.

During pounding, transmission mechanism 39 is driven to its extended position, thereby beater 6 is can be under the effect of off-center column or cam 8 and 9 whole freely does vertical movement.In each swing circle, offset cam is only tightly clamped the web 27 of beater 6 and is promoted it upwards in the part-time therein, allows it fall once more in the cycle in remainder before again it upwards being promoted then.

Finish and beater 6 will be thus lifted to its highest or rest position the time when pounding, transmission mechanism 39 enters its stationary state.This makes the elasticity stretching device 38 that reverses

cylinder

28A and 28B can be pressed on the web 27 all the time.These two

cylinder

28A and 28B are so installed, and make that they can rotate freely towards the beater ascent direction shown in the arrow F among Fig. 4 when off-center column 8 and 9 upwards drives beater.If beater 6 has enough momentum, after off-center column 8 and 9 discharged it, it still can continue to rise so, did not appoint how it can not be towards dropping back but have.

Cylinder

28A and 28B can not rotate towards the whereabouts direction, and stretching device 38 is oppressed them with enough pressure (having been increased by lever 32 and 34) and cooperated the braking of generation to be enough to prevent the beater whereabouts with friction coatings 31 to guarantee them.

Each off-center column 8 and 9 drives beater 6 upwards, all produce identical effect, thereby beater has promptly arrived its top or rest position.In addition, locking gear (end illustrates among the figure) has prevented that beater 6 from falling from their tip position.

Can observe, in drift stop real work of the present invention,

cylinder

28A and 28B only roll on friction coatings 31, and remain to roll with coating and contact, thereby have eliminated the danger of destruction coating, and minimum degree has been reduced in abrasion.In addition, the braking action of

cylinder

28A and 28B is automatically, and actions complete and off-center column 8 and 9 are irrelevant, thereby do not need to cooperate operation.Under the effect of elastic stretching device 38,

cylinder

28A and 28B cut down output to the pincers of coating 31 on the web 27 and have given birth to the beater of controlled braking to stop gradually and.And this device is generally speaking simple in structure and be easy to make.

Because its simple and reliable operation, described embodiment is preferable.Yet, work when beater is raised in order to make braking and holding device, also can adopt the motion of other two cylinder 28A of equality unit control and 28B the pincers of beater web 27 to be pressed, and not surmount scope of the present invention with them.

According to an additional improvement of the present invention, each in the beater 6 has at least one, preferably several detectable marks 41, the detector 42 of this mark correspondence on the corresponding upholder that is fixed on the platform 4.These transmitters 42 connect a central monitoring device.Thereby can monitor the suitable action of each beater outside certain distance, and detect the beater of any stroke defect, this mistake is normally caused by abrasion by the friction coatings on the web 27 that is coated in hammer stem 7 31.Detectable marker can be the tinsel 41 that stainless steel is made, and is fixed on the outside surface such as the edge, hammer stem 7 one place of each beater 6.These tinsels 41 only show on leftmost two beaters 6 in Fig. 1.Preferably place a plurality of tinsels 41 on vertical equal intervals ground of each beater 6.Like this, this can measure each beater working speed and amplitude in vertical direction, and keeps monitoring always, thereby, just can lean out the abrasion of coating 31 in early days.The transmitter 42 of surveying stainless steel metal sheet 41 is non magnetic, can be available on market, thereby here do not need to be described.Central monitoring device also there is kindred circumstances.

Claims

1. the machine of the coal mixtures used of a tamping coking, pound and have smashing in the box of length L at one and carry out, this machine comprises is a plurality ofly smashing the beater that vertically splits with roughly constant spacing (E1) of box, and each beater comprises that one is being smash the box longitudinal stretching and having size (l ₂) the hammer boots, described machine can smash box vertically on significantly to move repeatedly less than the displacement interval of smashing box length (L) (C), described machine has also been equipped and has been used for vertically to-and-fro movement being passed in the above the displacement interval (C) the displacement drive member of machine smashing box, described machine comprises a plurality of simple gravity stamps (1,1 ', 1 "; 1 ...); each simple gravity stamp comprise one the lateral extent of smashing box and be contained in chassis on the wheel (2; 2 '; ...), the chassis is loaded with a beater (6 at least, 6 ',), its working component is at least at a fabrication line (5A, 5B, 5C, 5D, 5A ' ...) on, described simple gravity stamp connects successively to be set up one and pounds chain and to have constituted gravity stamp overall, it is characterized in that, in every simple gravity stamp and between the simple gravity stamp of successive, fabrication line (5A, 5B, 5C, 5D, 5A ',) all separate one and be approximately equal to described distance (E ₁) spacing, the numerical value of displacement interval (C) is substantially equal to spacing (E ₁) half, the hammer boots size (l ₂) numerical value be substantially equal to spacing (E ₁) half.

2. machine as claimed in claim 1, it is characterized in that, each simple gravity stamp (1,1 ', 1 ', 1 ...) equipped a plurality of beaters (6), the offset cam (8 of these beaters, 9) being installed in chassis (2) respectively passes through by a plurality of bearing (12A, 12B, two common drive shaft (10 of the device support of 12C) forming, 11) on, these two transmission shafts (10,11) link to each other mutually by rotary actuator, one of them links to each other with the take-off (propeller) shaft (14) of step down gear transmission mechanism (15) rotating, and step down gear transmission mechanism (15) has the input shaft (16) of the take-off (propeller) shaft of a motor (19) that is connected and fixed on chassis (2) with turning round.

3. machine as claimed in claim 1, it is characterized in that, every simple gravity stamp (1,1 ', 1 ", 1 ) chassis (2) notch (22) is at one end arranged; and the end of back to back simple gravity stamp in its chassis (2 ') have a tongue (23), and described tongue has with notch complementary shape and embeds described notch (22).

4. machine as claimed in claim 2 is characterized in that, the take-off (propeller) shaft (14) of step down gear transmission mechanism (15) is hollow, thereby the terminal portions of corresponding common drive shaft is filled in described Hollow Transmission Shafts transmission rotation swinging moment.