CN100406325C

CN100406325C - Floating lateral support for two successive wagon structures articulated on a single railway bogie

Info

Publication number: CN100406325C
Application number: CNB038047179A
Authority: CN
Inventors: 让-吕克·安德烈
Original assignee: Lohr Industrie SA
Current assignee: Lohr Industrie SA
Priority date: 2002-02-28
Filing date: 2003-02-27
Publication date: 2008-07-30
Anticipated expiration: 2023-02-27
Also published as: CN1638994A; EP1478558B1; RU2004128942A; AU2003222949A1; EP1478558A1; DE60302442T2; ATE310661T1; WO2003072413A1; RU2308390C2; ES2256730T3; DE60302442D1; FR2836443A1

Abstract

The invention relates to a floating lateral support for two successive wagon structures (1) and (2), articulated on a single railway bogie, comprising a bogie suspension unit or axle bar on each side of the central articulation of the bogie, on which is displaceably mounted, by means of a support bearing plate (20), a support (21) with an articulation providing a displacement between said support bearing plate (20) and a end toe (24) which represents a first functional displacement, whilst the other end toe (25) has an intermittent mechanical connection by means of a frictional support contact between the lower face thereof and the upper face of said bearing support plate (20) which represents another functional displacement between a support position and a raised position. The invention is of interest to rolling stock producers, particularly with a common bogie.

Description

Be used to be hinged on the unsteady sidepiece supporting member of two continuous carriage body construction on the same railway bogie

Technical field

Be hinged on the unsteady sidepiece hinged support spare between the opposite end of two carriage body construction on the same bogie truck.

The invention belongs to railway territory, more specifically, belong to the railway transport field of on-road vehicle on the compartment.

The invention particularly relates to a kind of floating hinge joint supporting member that is used for the opposite end of two articulator end structures, be hinged on same bogie truck by a central articulation piece between these two ends.

Background technology

Railway transport field exists many by the formed train system of a series of carriage body construction, and the relative two supports in these compartments is on same bogie truck.Generally be to be hinged by a public central articulation piece between these ends, central articulation piece then is bearing on the underframe of bogie truck by a hinged support spare that is called as the end face bearing.This end face bearing of globulate articulation piece form has guaranteed the end of interconnective carriage body construction and the hinged relationship between the bogie truck base portion underframe.

The central support of this point-like has been reserved side direction and one has been swung idle travel longitudinally.

For the purpose of stable, this central support is replenished the sidepiece supporting that has been equipped with every side, limits this idle travel by the inside limiting stopper in the device.

These sidepiece supporting members that are installed in the every side of central articulation piece are known as the other support of bogie truck traditionally.Just can weaken and limit because the motion and the dynamic force of the carriage body construction that operation causes by these sidepiece supporting members.

In the conventional mode, each all is made of the other support of these bogie trucks a dynamic support plate, and it is installed on the mobile base that can move with respect to underframe, and by two spring suspensions on this underframe.The supporting role power that acts in the other support of bogie truck will be compressed these springs and make base move in the motion that weakens.

Application force is all the same from which end result.Like this, the little idle travel amplitude in the end at this sidepiece supporting member place shows as the Loaded goods that is transported high-end very big moving, and this may deviate from the enforceable railway norm of the Loaded goods that is transported.

Known a kind of existing solution, according to this scheme, the propulsive effort that the end of ordering about another carriage body construction by the end of a carriage body construction produces rolling motion and pitching motion reduces like this: in the transmission of application force, use certain clearance that an end is pressed on another.Like this, can both move independently of each other in each end, the gap of being introduced in the technology of having filled up the end connects.In fact, it only relates to a slow application force, and after a period of time, because an end produces motion in another end of its driving in service, two other supports are encouraged jointly.

This solution has only been brought little improvement, because for fear of pause, this gap can not be too big; And all defect all can reappear outside this gap.The height aspect that the existence in this gap has increased the Loaded goods that is transported deviates from the danger of railway norm.

Summary of the invention

The present invention is intended to carry out railway transportation with the Loaded goods of a maximum height, and especially under the situation of trailer and superimposed trailer, the motion conditions of carriage body construction how when no matter travelling, and all makes it satisfy railway norm.

The present invention also is intended to the gap of avoiding excessive in the articulation piece, guaranteeing reliability, and causes easy realization technical and economically.

Owing to less involve articulation piece and structure, just improved reliability.Owing to alleviated structure, just reduced material cost and cost of labor and deadweight.

The objective of the invention is to overcome above-mentioned various defectives, and bring a large amount of advantages.

For this reason, the present invention relates to a kind of two continuous carriage body construction of being used for, the sidepiece supporting member floats, these two continuous carriage body construction are hinged on the same railway bogie by a public central articulation piece, the sidepiece supporting member that is positioned at the central articulation piece every side of this bogie truck or public both sides that is adopted comprises: a resilient suspension assembly that is supporting friction fitting, the first end pawl of a carriage body construction, the second end pawl of another carriage body construction, all end pawls are connected by hinged support spare supporting and articulation piece that have idle travel by one, this hinged support spare is installed on the pressured back plate, pressured back plate then can be with respect to this suspension assembly on suspension assembly, and move with respect to a discontinuous bonded assembly attaching parts, this attaching parts comprises a Frictional Slipping supporting region that is positioned on the pressured back plate, and an attaching space that is in the opening between this Frictional Slipping supporting region and the second end pawl.

This structure can be brought many advantages.

Because carriage body construction does not exist machinery to involve to each other, the independence of all motions has been guaranteed the height reliability of function and the long life of material in predetermined idle travel scope.

By the gain of material aspect, and, just can alleviate the weight of structure by some simplification that can reduce the set-up time and more generally reduce the enforcement aspect of structure time.

By means of the present invention, by the vertical idle travel between the carriage body construction, and by limiting its mutual action, just can be with the maximum height shipping goods in the restriction of railway norm.

Summary of drawings

Subsequently fully as for example and in the description taken in conjunction with the accompanying drawings, it is clearer that other features and advantages of the present invention will become, wherein:

Fig. 1 is a three-dimensional assembly diagram, has represented the end of a bogie truck and a carriage body construction;

Fig. 2 is a planar view, has represented that the opposed end of bogie truck and continuous two carriage body construction is hingedly mounted on this bogie truck;

Fig. 3 and Fig. 4 connection block diagram between two ends of sidepiece hinged support spare of the present invention place, carriage body construction in order to express hinged support spare, has removed second in the principal plane and has connected pawl among Fig. 4;

Fig. 5 and Fig. 6 are respectively in the respective element position, such as that locates on the left of Fig. 9, the horizontal and vertical cross sectional view of sidepiece hinged support spare;

Fig. 7 and Fig. 8 be respectively in the respective element position, such as place, Fig. 9 right side, the horizontal and vertical cross sectional view of sidepiece hinged support spare;

Fig. 9 is that this top is in the right side of paper according to the transverse sectional view on the bogie truck top of first modification;

Figure 10 is a three-dimensional assembly diagram, has represented the bogie truck in second modification and the end of a carriage body construction;

Figure 11 and Figure 12 connection block diagram between two ends of sidepiece hinged support spare of the present invention place, carriage body construction in order to express hinged support spare, has removed second in the principal plane and has connected pawl among Figure 11; And wholely removed intermediate pawl so that express the central block of articulation piece;

Figure 13 and Figure 14 are respectively cross-sectional plane and the longitudinal cross-section views that is positioned at the sidepiece articulation piece of an opposite side with Figure 11 and Figure 12, and the two ends pawl in corresponding second modification all is in the situation of pressured state;

Figure 15 and Figure 16 are respectively cross-sectional plane and the longitudinal cross-section views that is positioned at the sidepiece articulation piece of an opposite side with Figure 11 and Figure 12 on the bogie truck, corresponding all are in the situation of the state of lifting at two ends pawl Figure 19 top, in second modification;

Figure 17 and Figure 18 are respectively in the respective element position, such as that locates on the left of Figure 19, the horizontal and vertical cross sectional view of sidepiece hinged support spare;

Figure 19 is the viewgraph of cross-section on the bogie truck top of second modification.

The specific embodiment

The present invention is applied in two from left to right continuous as shown in Figure 2

carriage body construction

1,2, and its relative two

ends

3,4 are hinged on the same bogie truck 5, and the latter has two

axletrees

6,7 and a underframe 8.Underframe 8 is supporting the end face bearing 9 of a hemisphere 10, and it is made of two pivotally attached complementary elements, and one of them is that sphere is held body 11, and another is to be embedded in this to hold hemisphere 12 in the body.

End face bearing 9 be connected in one public, sway and have the central articulation piece 13 of side on oscillation idle travel, it has constituted main articulation piece, makes

end

3,4 interconnect rotationally thus.

End face bearing 9 and public central articulation piece 13 have constituted the compound articulation piece with three degree of freedom, and it allows to take place all and the relevant inclination of motion of travelling, comprising lateral oscillation and oscillation in the pitch mode.

The

opposite end

3,4 of carriage body construction interconnects by a discontinuous once in a while special

sidepiece attaching parts

14,15 in every side between the two.

Support its end when moving, be provided with the

sidepiece supporting member

16,17 of two activities, all supporting one end member in the discontinuous bonded assembly

sidepiece attaching parts

14,15 on each sidepiece supporting member respectively in order to be at continuous

carriage body construction

1,2.

According to following apparatus of the present invention, these discontinuous bonded assembly

sidepiece attaching partss

14,15 constitute in common mode.A vertical movable base 18 is installed on the spacing suspension gear, and it has constituted the bogie truck suspension assembly 19 of the other support of the so-called bogie truck of technical term.End face or its covering wipe contact of pressured back plate 20 and base 18.

According to first modification of the present invention, be fixed on this base 18 or be mounted thereon or a relative hinged support spare 21 is holding a for example articulation piece 22 of jointed shaft 23 types.

Carriage body construction

1,2

end

3,4 at each discontinuous bonded assembly

sidepiece attaching parts

14,15 places have the extension of some end claw type formulas, at each discontinuous bonded assembly sidepiece attaching parts place, realized that the other support of an end and bogie truck is connected, the other end then is in the state of lifting according to the end of respective end pawl or the supporting state of contact realizes being interrupted once in a while or closed connection.These end pawls that are present in every side are two kinds of forms: be used for the yoke end pawl 24 of end 3, and the two pawls 25 in end that are used for end 4, they are toward each other in public central articulation piece 13.

The two pawls 25 in end are configured as two

bluff pieces

26,26a, and one of them, has the lower surface of being arranged to respect to pressured back plate 20 almost parallels by preferably two.

Especially each sidepiece hinged support spare of the present invention has following element.

Dish-shaped base 18 is vertically installed slidably by the core 27 of its for example cylindrical protrusion, so that it can be directed to slidably in for example columniform seat 28, this cylindrical seat 28 is arranged on the fixed support 29 that is connected in bogie truck underframe 8.By the central block 30 of a bearing fit in center cavity 31, can make guiding function become better.

Base 18 is placed on the bogie truck suspension assembly that is made of at least two

compression springs

32 and 33, and the end of pressing spring by end member is to form this suspension assembly 19.The spring 32 of suspension assembly and 33 is by some

inner member

34,35 channeling conducts, and in the compression-stretching routine when working corresponding to suspension assembly, spring moves along these inner members.

Fig. 5 extremely these

inner members

34,35 shown in Figure 8 plays a part guiding and spacing simultaneously.Hereinafter they are called guiding and limit element.In fact, the lower surface of base 18 will be done spacing the contact with the front of limit element with these guiding when its idle travel finishes, thereby can reduce these motions at some during corresponding to the significantly motion of base 18 idle travels.

Can find then, be installed in the insertion element 36 that the pressured back plate 20 on base 18 upper surfaces is equipped with a friction and supports with the friction support pattern.Pressured back plate 20 can be realized by various technology, for example by a plurality of stacked plates, such as the three ply board shown in the figure, and forms a kind of composite structure, but also can be any other structure.

Pressured back plate 20 has a friction supporting region 37 on the surface thereon, for example is centered around extending of hinged support spare 21 on every side and mutually.This friction supporting region 37 is configured to around hinged support spare 21, but with it at a distance of some distances, and the single-piece of a shaped as frame or the friction insert 38 of multi-piece type be equipped with; Be separately positioned on two bluff pieces 26 of the two pawls 25 in end, corresponding each

base plate

39,40 on the 26a lower surface just is bearing on this friction insert 38.

The edge that the friction insert 38 of shaped as frame for example is configured to make its inner circumference and hinged support spare 21 is at a distance of some distances, and for the upper surface of pressured back plate 20, it is recessed down slightly towards the bottom.It is embedded in the friction supporting region 37, and make a solid slab or a tectal form by the material of great friction coefficient, thereby in the end bluff piece 26 of two pawls 25, base plate 39 on each lower surface of 26a, 40 when the friction insert 38 of friction in the supporting region 37 done Frictional Slipping and supporting work, can dissolve most mechanical energy.

Can be provided with two inserts 38, they are in each other near on vertical position of hinged support spare 21.

According to shown in modification, this hinged support spare 21 is configured to vertical stirrup shape, shows as the form of mechanical lock, for example is made of two side parts and assembles by the pin 41 in the pressured back plate 20.Hinged support spare 21 has the groove 42 that a pivot 23 for articulation piece 22 moves at an upper portion thereof.This groove 42 forms in the horizontal cylindrical cavity of bottom, by two openings or extend towards the top by the branch that horizontal safe attaching parts merges reinforcement by connection.The pivot 23 of articulation piece 22 can along this groove 42 from the top position downwards the position move, and move in reverse direction.The sidepiece of yoke end pawl 24 just is installed on this pivot 23.For moving of the pivot 23 of articulation piece 22, groove 42 has towards the cross-sectional plane of the substantially elliptical of top opening, but opening part preferably seals by horizontal safe attaching parts, for example by (unshowned) bolt.

Unsteady installation in conjunction with pressured back plate 20, its range of movement is between two pawls 25 in end and pressured back plate 20, the pivot 23 of articulation piece 22 along it shifting chute 42 thereunder the vertical mobility between position and the top position show as vertical idle travel as freedom of motion.As in the following operation explanation will as described in, above-mentioned range of movement correspondence the process between the position lifted of the two pawls 25 of bearing position and end.Also can utilize opposite mobility, just hinged support spare 21 is with respect to the mobility of pivot 23, and in this case, pivot is fixed.Certainly, the various situations in conjunction with these two kinds of mobilities also all are feasible.

According to a particular variant of this function, can make hinged support spare 21, with fully independently motion mutually between the end that obtains carriage body construction with respect to pressured back plate 20 activities.According to this modification, hinged support spare 21 passes pressured back plate 20, so that its thrust is directly acted on and is pressed against on the friction member 36 of the suspension assembly 19 that constitutes the other support of bogie truck.For this reason, this hinged support spare 21 can be contained in one (unshowned) slidably and passes in the opening at pressured back plate 20 centers.Accurate supporting of moving and having brought good operability and being rendered as supporting member 21 base portions by some grooves or other member channeling conduct.Certainly, in this case, pivot 23 is no longer essential along the idle travel of its groove, and this is because by mobile this idle travel that guaranteed of hinged support spare 21.

Another modification can also be arranged, and according to this modification, hinged support spare 21 also moves with respect to pressured back plate 20, but acts on indirectly in the other support of the bogie truck that passes this plate 20.In this situation, can between hinged support spare 21 and plate 20, provide an additional idle travel by the spacing before the contact.

In motion, according to coming from motion certain carriage body construction or a certain side of this carriage body construction, the sidepiece supporting member that floats will move along a certain direction, for example move towards the top from the bottom, and will be perhaps opposite.

End position is illustrated among Fig. 5 to Fig. 9.

Thrust come from the left side carriage body construction 1 situation under (Fig. 5 and Fig. 6), when when wave the bottom, the fork catch 24 of end will be pressed in suspension assembly 19 or the other support of bogie truck by hinged support spare 21, up to the compression spring 32 and the 33 spacing in-to-ins guiding locating

parts

34 and 35 that contact that are compensated or pass through suspension assembly 19.In fact, in case pivot 23 abuts to the bottom of groove 42, suspension assembly is just under the thrust of the respective end 3 of carriage body construction 1, because the effect of suspension assembly spring and sinking in the motion that weakens.

If thrust also has horizontal component, pressured back plate 20 just slides on friction support insert 36 by cliding friction.

In groove, rotate during for pitching, be provided with pivot 23.

In contrast, in the situation of Fig. 7 and Fig. 8, the two pawls 25 of supporting are subjected to the thrust towards the bottom, and that is exactly two elements 26 of the two pawls 25 of supporting, and 26a is pressed on the friction supporting region 37 by its

overplate base plate

39,40 and makes suspension assembly 19 sink.Suspension assembly 19 descends together with hinged support spare 21, owing to possess along the freedom of motion of elliptic cross-section groove, just pivot 23 has been stayed its position in groove 42.

Because do not have functional mechanical connection between the

bluff piece

24,25, any combination of above-mentioned motion all is possible.

So just make the motion that is independent of another carriage body construction end subsequently in the motion maximum empty stroke range in use of end of a carriage body construction.

In the modification of hinged support spare 21 with respect to pressured back plate 20 independent slips, it is fully independently, and each end of each carriage body construction can both be moved alone and act on the friction member 36 of the other support of bogie truck.

The total advantage of the present invention is that it has at least two idle travels, and one is present in hinged support spare, and another is to be present between end pawl 25 and the pressured back plate 20 when travelling motion.

According to the characteristics of end motion, these idle travels must not possess simultaneously.In the various common application scenario of carriage body construction, these idle travels provide the idle travel that can avoid passing motion to another end in motion, and moreover, also the spring by suspension assembly 19 has alleviated these motions.

Second modification that is illustrated among Figure 10 to Figure 19 has identical general function and corresponding parts.Identical or essentially identical element is marked with identical figure notation.

Can find in second modification 23 the horizontal pivot 23 of being labeled as, so that farthest reduce to wave couple to bogie truck other support the reduction as much as possible articulation piece 22.In fact, the effect of friction is to produce a couple, and friction member from pivot is far away more just more can be firmly pressured.For excellent function,, need make this effect keep minimum in order to reduce to wear and tear and stability when avoiding couple to have influence on the compartment travelling.

So just seen a base 18 that is installed in the vertical activity on the spacing suspension gear again, they have constituted the bogie truck suspension assembly 19 of the other support of the so-called bogie truck of technical term.Have a hinged support spare 43 with the end face of base 18 or the pressured back plate 20 of its accessory wipe contact, it is holding one can be around the special articulation piece 44 of horizontal shaft rotation and vertical shifting.Although multi-aspect articulation piece for example the ball-and-socket type joint type or equivalents also is suitable for the idle travel of the motion of doing, has only vertical shifting and related to round the rotation of the horizontal shaft that passes articulation piece.

One 45 two

branches

46,47 that have corresponding to two pawl 25 similar same form in the end pawl, but difference is that the end of its another end pawl is central authorities' end pawl 48 that is directly installed on the articulation piece 44.

More specifically referring to Figure 11 and Figure 12, central authorities' end pawl 48 ends at one towards the end of bottom and have a cavity volume, and cavity volume has formed the holding tank 49 that is used for articulation piece 44.Articulation piece 44 is bearing on the hinged support spare 43 of 50 shapes of parallelepiped for example.The receiver element 51 of straight line as seen in Figure 12 for example also is housed on this hinged support piece, and it matches with the contact 52 that is configured in groove 49 bottoms, to be configured for the security component of hinge function.Be made for this hinged support spares 43 of anchor plate 50 shapes has convex outer surfaces on its side sheath supporting member 53, this sheath supporting member 53 when work with respect to the liner 54 that embeds on groove 49 sides.This liner 54 has flat outside face, the contact surface when this has reduced to contact with sheath supporting member 53.

Here should be appreciated that hinged support spare 43 is anchor plates 50 that are positioned on the pressured back plate 20.

As previously mentioned, this is installed on the back plate 20 or the hinged support spare that is connected as a single entity with it, can be linked to each other with plate 20 or is interrelated with it by different modes.Especially this hinged support spare can be installed versatilely with respect to plate 20.

In order to form mechanical component articulation piece 44, that institute describes and uses by hinged support spare 43 supporting, can be when working the small idle travel amplitude of generation and being selected.

Can reach a conclusion by the research to above-mentioned member: this total function is decomposed in the motion of all end pawls carry out according to mode of the present invention fully, this is a modification in the scope of the invention fully.

As for operation scheme, its main phase can be referring to above-mentioned detailed description about first modification.Particularity during this second modification operation is that the articulation piece 22 that will have the axle 23 of vertical shifting replaces with special articulation piece 44.About the function of this special articulation piece, can make the explanation of assembly function more complete.

When one section of generation or the generation motion of the feasible end of another section bending pawl place, end pair pawls 45 lean on by the sliding pressure with the first modification same way as and work, and in contrast, central authorities hold 48 motions that self is suffered of pawl to be directly passed to articulation piece 44.This can dissolve various types of deviations, what produced may be vertical move or round the inclination of horizontal pivot, and can above-mentioned phenomenon be alleviated, and realize fractionation as main purpose of the present invention.

Claims

1. unsteady sidepiece supporting member that is used for two continuous carriage body construction, each carriage body construction has by a public central articulation piece (13) and is hinged on end on the same railway bogie, be positioned at this sidepiece hinged support spare of the every side of central articulation piece and comprise an elastomeric bogie truck suspension assembly (19), its upper surface upper support a friction sheath, come from travelling, by the motion that the second end transmitted of the first end of one of them carriage body construction and/or another continuous carriage body construction and the thrust that causes just act on this friction sheath, it is characterized in that

Thrust acts on by pressured back plate (20) on the friction sheath of bogie truck resilient suspension assembly (19), is bearing in to pressured back plate self friction on the friction sheath of bogie truck resilient suspension assembly (19) or on the one element;

Hinged support spare is installed on the pressured back plate (20) regularly or versatilely, pressured back plate (20) self can move on the friction sheath of bogie truck resilient suspension assembly (19) or on the one element by the pressured contact of Frictional Slipping, forms a work idle travel thus;

It is free idle travel that the second end of continuous carriage body construction lifts between position and the subsidence position at it, when described subsidence position, the pressured contact of upper surface Frictional Slipping of the second end and pressured back plate (20) forms discontinuous once in a while connection and another work idle travel thus;

Come from travelling thrust on the one hand by with the second end that acts on continuous carriage body construction that contacts of pressured back plate (20), the hinged support spare that links to each other by articulation piece acts on the first end of one of them carriage body construction on the other hand.

2. unsteady sidepiece supporting member as claimed in claim 1 is characterized in that, described articulation piece is an articulation piece that has idle travel, and its idle travel has formed another work idle travel of described suspension assembly thus.

3. as the described unsteady sidepiece supporting member of each claim of front, it is characterized in that described articulation piece is a pivoted hinge (22); Described hinged support spare is such supporting member (21): between a high position and a low level this pivoted hinge (22) is installed movably along one of them groove, forms the first work idle travel thus.

4. unsteady sidepiece supporting member as claimed in claim 2 is characterized in that hinged support spare (21) can move with respect to pressured back plate (20), so that directly be implemented in the pressured contact of Frictional Slipping on the friction element of suspension assembly (19).

5. unsteady sidepiece supporting member as claimed in claim 3, it is characterized in that, movable hinged support spare (21) can move with respect to pressured back plate (20), so that directly be implemented in the pressured contact of Frictional Slipping on the friction element of suspension assembly (19) by this pressured back plate (20).

6. unsteady sidepiece supporting member as claimed in claim 4, it is characterized in that, movable hinged support spare (21) is pressured contact with it with respect to pressured back plate (20), so that be implemented in the pressured contact of Frictional Slipping on the friction element of suspension assembly (19) indirectly.

7. unsteady sidepiece supporting member as claimed in claim 6 is characterized in that, is a kind of pressured contact that has idle travel with pressured contact of pressured back plate (20).

8. unsteady sidepiece supporting member as claimed in claim 4 is characterized in that, the Frictional Slipping between described the second end and the pressured back plate (20) is pressured to be to carry out on the upper surface of pressured back plate (20).

9. unsteady sidepiece supporting member as claimed in claim 1 is characterized in that, the axle of articulation piece (22) is a pivot (23).

10. unsteady sidepiece supporting member as claimed in claim 9 is characterized in that, pivot (23) is installed and is bearing in the shifting chute (42), and its cross sectional shape is oval substantially, and has one for pivot (23) dependence columniform reception bottom wherein; And pivot (23) can move between a top position and lower position along this shifting chute (42), forms first idle travel thus.

11. unsteady sidepiece supporting member as claimed in claim 1, it is characterized in that, articulation piece be one round horizontal shaft and pivoted hinge vertical shifting (44), it is installed in by on the formed hinged support spare of hinged mechanical block (50) (43), it is installed in the groove (49) on the end that forms in central authorities ends pawls (48) described hinged mechanical block (50) as hinged support spare, realizes the first work idle travel thus.

12. unsteady sidepiece supporting member as claimed in claim 1 is characterized in that, the hinged support spare (43) that is mechanical block (50) form of articulation piece (44) is installed on the pressured back plate (20), realizes the first work idle travel thus.

13. unsteady sidepiece supporting member as claimed in claim 1 is characterized in that articulation piece (43) is the ball-and-socket type joint type.

14. unsteady sidepiece supporting member as claimed in claim 1 is characterized in that, pressured back plate (20) has a upper surface and a pressured lower surface; And hinged support spare (21) is stirrup shape and is supported by this pressured back plate (20).

15. unsteady sidepiece supporting member as claimed in claim 1, it is characterized in that, pressured back plate (20) is pressed on the suspension assembly (19) with its lower surface, described lower surface contacts with the friction insert (36) that suspension assembly (19) is supported, suspension assembly is with respect to insert (36) Frictional Slipping, and friction insert (36) is supported by the base (18) of suspension assembly (19).

16. unsteady sidepiece supporting member as claimed in claim 1 is characterized in that, first end of a described carriage body construction, or end pawl (24) end at the forked part that is installed on the pivot (23).

17. unsteady sidepiece supporting member as claimed in claim 1, it is characterized in that, the second end pawl (25) of described another continuous carriage body construction is pressured two pawls, it one of them element (25,26) have flat bottom surface, be equipped with the base plate of the friction supporting region (37) on pressured vis-a-vis back plate (20) upper surface on its bottom surface.

18. unsteady sidepiece supporting member as claimed in claim 1 is characterized in that, friction supporting region (37) is equipped with friction insert (38).

19. unsteady sidepiece supporting member as claimed in claim 18 is characterized in that, friction insert (38) is shaped as frame, and the position of below slightly on plane, upper surface place that is arranged in pressured back plate (20) is round the bottom of hinged support spare.

20. unsteady sidepiece supporting member as claimed in claim 14, it is characterized in that, the two pawls (24) in end, be equipped with base plate at least one flat lower surface of pressured back plate (20) upper surface vis-a-vis, base plate will with pressured contact of friction insert (38) of pressured back plate (20), and on this insert Frictional Slipping.

21. unsteady sidepiece supporting member as claimed in claim 1 is characterized in that each end of continuous carriage body construction all ends at least one end pawl in every side, and transmits the thrust that comes from when travelling by these end pawls.