CN102493654B

CN102493654B - Engineering machine

Info

Publication number: CN102493654B
Application number: CN201110432993.6A
Authority: CN
Inventors: 刘星; 张友林; 陈鼎星
Original assignee: Sany Heavy Industry Co Ltd
Current assignee: Sany Heavy Industry Co Ltd
Priority date: 2011-12-21
Filing date: 2011-12-21
Publication date: 2014-05-21
Anticipated expiration: 2031-12-21
Also published as: CN102493654A

Abstract

The invention discloses a construction machine, which includes a chassis and a fixed turret arranged on the chassis, the fixed turret is connected with a leg device, and the leg device includes a horizontal leg and a first support leg connected to the end of the horizontal leg; The turret includes a turntable frame, which is connected with the turntable of the engineering machinery, and also includes an outrigger frame fixed under the turntable frame. The outrigger frame includes at least two connecting arms, and the outer ends of each connecting arm are connected with the horizontal support The legs are articulated; any two adjacent connecting arms intersect, or the extension lines of any adjacent two connecting arms intersect; the horizontal outrigger includes at least two sequentially articulated arm sections, and any two adjacent arm sections There is a second driving part that drives the adjacent boom section to expand and fold; in each boom section, the root end boom section is hinged with the connecting arm, and there is a drive part between the two that drives the root end boom section to expand and fold. The first driving part, and the first supporting leg is connected to the end of the last boom section in each boom section.

Description

Engineering machinery

Technical Field

The invention relates to the technical field of engineering machinery, in particular to engineering machinery comprising a fixed turret and a supporting leg device.

Background

Many engineering machines need to adopt a turret device to realize rotation of the arm support during working so as to ensure the working flexibility of the arm support during the working of the engineering machines; and a support leg device which can rotate in a horizontal plane is arranged on the turret so as to realize the support of the engineering machinery. Turret devices typically include several large parts, a fixed turret, a turntable and a slewing mechanism; the fixed turret is used as a main body of the turret device and is a base body for bearing the rotary table and the supporting legs; the rotary table can rotate relative to the fixed turret through the rotary mechanism, so that the arm support is driven to rotate. The leg arrangement is usually hinged to a fixed turret, which enables support and transition of the work machine by expansion and contraction of the legs.

Referring to fig. 1 and 2, fig. 1 is a schematic structural view of a fixed turret of a construction machine according to the prior art; fig. 2 is a schematic structural diagram of a leg device of a construction machine in the prior art; the disadvantages of such a working machine in operation will be briefly described below.

In the prior art, as shown in fig. 1, the fixed turret is a box-type structure with a relatively regular structure formed by welding steel plates, and is fixedly connected to a chassis of an engineering machine, the turntable is mounted on the fixed turret through a slewing bearing, and a swing leg mounting base 1 ″ and a telescopic leg mounting base 2 ″ are arranged on the fixed turret and are respectively used for mounting a swing leg and a telescopic leg. As shown in fig. 2, the leg in the prior art includes two front leg devices 1 ' and two rear leg devices 2 ', the front leg device 1 ' includes a support arm 11 ', a standard arm 12 ', a leg connecting arm 13 ' and a leg frame 14 ' fixed on the machine body 3 ', the support arm 11 ' is connected with the standard arm 12 ' through a hinge, the standard arm 12 ' is hinged with the leg connecting arm 13 ' through a hinge, the leg connecting arm 13 ' is connected with the rotary base of the concrete pump truck through a telescopic oil cylinder, the telescopic oil cylinder drives the supporting leg connecting arm 13 'to move in a telescopic way in the supporting leg frame 14', and then the standard arm 12 'and the supporting arm 11' are driven to move in a telescopic mode in the supporting leg frame 14 ', the two supporting leg frames 14' are connected with a rotary base of the concrete pump truck, the two supporting leg frames 14 'are arranged on two sides of the base of the concrete pump truck in parallel, and the two supporting leg frames 14' are located in the same plane.

After the engineering machinery finishes transportation and transition and arrives at a working place, the extension or the shortening of the supporting legs and the determination of the angle are realized through the reciprocating movement of each arm section in the supporting leg frame 14 ' and the horizontal rotation of the supporting arms 11 ' and the standard arms 12 ' and the supporting leg connecting arms 13 ', and then the supporting of the concrete pump truck is realized through the supporting legs which are connected to the vertical arrangement at the bottom end of the supporting arms 11 ', so that the working stability of the concrete pump truck is ensured.

However, the fixed turret of the box-type structure has the disadvantages of large volume, large mass, more raw materials, heavy structure, large impact of concrete piston movement on the fixed turret during the working process of the pump truck, easy vibration of the fixed turret of the box-type structure, high noise and poor heat dissipation performance. In addition, the supporting arm 11 ', the standard arm 12 ' and the supporting arm connecting arm 13 ' of the supporting leg device are sleeved in the supporting leg frame 14 ', and telescopic movement is achieved through the telescopic oil cylinder arranged in the supporting leg frame 14 ', the structure is very complex, and the manufacturing, processing, assembling and disassembling are inconvenient, so that the working efficiency of the concrete pump truck is low.

In view of the above, it is desirable to optimally design the structures of the fixed turret and the leg device of the existing engineering machinery, so that both the fixed turret and the leg device have simple structures and are convenient to machine and manufacture, and the fixed turret further has the advantages of small volume, light weight and good shock resistance.

Disclosure of Invention

The technical problem to be solved by the invention is to provide an engineering machine, so that the fixed turret and supporting leg device of the engineering machine has the advantages of simple structure, convenience in processing and manufacturing, small volume, light weight and good shock resistance.

In order to solve the technical problem, the invention provides an engineering machine, which comprises a chassis and a fixed turret arranged on the chassis, wherein the fixed turret is connected with a supporting leg device, and the supporting leg device comprises a horizontal supporting leg and a first supporting leg connected to the tail end of the horizontal supporting leg;

the fixed turret comprises a rotary table frame, a supporting leg frame and a rotating mechanism, wherein the rotary table frame is connected with a rotary table of the engineering machinery, the supporting leg frame is fixed below the rotary table frame and comprises at least two connecting arms, and the outer ends of the connecting arms are respectively hinged with the horizontal supporting leg; any two adjacent connecting arms are intersected, or the extension lines of any two adjacent connecting arms are intersected.

The horizontal supporting leg comprises at least two arm sections which are sequentially hinged, and a second driving part for driving the adjacent arm sections to unfold and fold is arranged between any two adjacent arm sections; in each arm section, the root end arm section is hinged with the connecting arm, a first driving part for driving the root end arm section to unfold and fold is arranged between the root end arm section and the connecting arm, and the first supporting leg is connected to the tail end of the tail end arm section in each arm section.

Preferably, the number of the connecting arms is four, and the four connecting arms are intersected to form an X-shaped supporting leg frame; the two oppositely arranged connecting arms are first integrally-formed arms, and the other two oppositely arranged connecting arms are second integrally-formed arms.

Preferably, the first integral arm is surrounded by a first vertical plate, a second vertical plate, a first upper cover plate and a first lower cover plate, and the first integral arm is provided with a first notch; the second integral arm is enclosed by a third vertical plate, a fourth vertical plate, a second upper cover plate and a second lower cover plate and is provided with a second notch; and at the crossing position of the X-shaped supporting leg frame, the first notch is matched and clamped with the second notch.

Preferably, the first upper cover plate and the second upper cover plate are integrally formed X-shaped upper cover plates, and the first lower cover plate and the second lower cover plate are integrally formed X-shaped lower cover plates.

Preferably, a second through hole is formed in the cross connection position of the X-shaped upper cover plate, and a third through hole is formed in the cross connection position of the X-shaped lower cover plate.

Preferably, both ends of the first integral arm and the second integral arm are provided with a supporting leg mounting seat; the landing leg mount pad is including locating the outside diaphragm that stretches out of the upper and lower both sides at first whole arm with the whole arm both ends of second, be equipped with on the diaphragm and be used for the articulated first through-hole of landing leg.

Preferably, the number of the connecting arms is four, two of the connecting arms intersect at a first connecting point, and the other two of the connecting arms intersect at a second connecting point; the two ends of the middle arm are respectively connected with the first connecting point and the second connecting point.

Preferably, the number of the connecting arms is four, the end of any one connecting arm is connected to the middle of the first adjacent connecting arm, and the end of the second adjacent connecting arm is connected to the middle of the connecting arm, so that the four connecting arms enclose a quadrangle.

Preferably, a support arm is further connected below the support leg frame, and the bottom end of the support arm is fixedly connected with the chassis.

Preferably, the rotating table frame is fixedly connected with four connecting arms.

Preferably, the second driving part comprises a second swing cylinder and a link mechanism, so that the adjacent arm sections can be driven to be unfolded at 180 degrees.

Preferably, a first adjacent arm section and a second adjacent arm section of the two adjacent arm sections are hinged through a pin shaft, and the first adjacent arm section is close to the fixed turret; the link mechanism comprises a first link and a second link; one end of the second swing oil cylinder is hinged with the root end of the first adjacent arm section, the other end of the second swing oil cylinder is hinged with the root end of the second adjacent arm section through the second connecting rod, one end of the first connecting rod is hinged with the second connecting rod, and the other end of the first connecting rod is hinged with the tail end of the first adjacent arm section.

Preferably, the horizontal support leg comprises two arm sections which are respectively the root end arm section and the tail end arm section and are hinged through a pin shaft; the root end of root end arm section articulates in the linking arm one side that is close to the locomotive when horizontal landing leg is in fold condition, the end of root end arm section is located the one side that is close to the rear of a vehicle, just end arm section articulate in the outside of root end arm section.

Preferably, at least one telescopic arm section exists in each arm section of the horizontal supporting leg, and each telescopic arm section comprises an outer sleeve, an inner sleeve arranged in the outer sleeve and a third driving part capable of driving the inner sleeve to move in the outer sleeve.

Preferably, the number of the leg devices is two, and the two leg devices are symmetrically arranged on the front side of the fixed turret;

the engineering machinery also comprises two rear supporting leg devices, each rear supporting leg device comprises a straight rod type supporting leg and a second supporting leg arranged at the tail end of the straight rod type supporting leg, and the two straight rod type supporting legs are symmetrically hinged to the rear side of the fixed rotating tower;

on the same side of the fixed turret, the distance between the hinge points of the leg device and the rear leg device on the fixed turret is greater than the distance between the hinge points of the two leg devices on the fixed turret.

The invention provides engineering machinery.A fixed turret comprises a supporting leg frame fixed below a rotary table frame, wherein the supporting leg frame comprises at least two connecting arms, and the outer ends of the connecting arms are respectively hinged with supporting legs of the engineering machinery; any two adjacent connecting arms are intersected, or the extension lines of any two adjacent connecting arms are intersected; the horizontal supporting leg comprises at least two arm sections which are sequentially hinged, and a second driving part for driving the adjacent arm sections to unfold and fold is arranged between any two adjacent arm sections; in each arm section, the root end arm section is hinged with the connecting arm, a first driving part for driving the root end arm section to unfold and fold is arranged between the root end arm section and the connecting arm, and the first supporting leg is connected to the tail end of the tail end arm section in each arm section.

By adopting the fixed turret with the structure, in the working process, the rotary table is connected with the rotary table frame in a rotary mode, the supporting legs are hinged with the connecting arms, the rotation of the arm support and the supporting effect on the whole machine can be realized, and compared with the fixed turret with a box-shaped structure in the prior art, the fixed turret structure with the structure is greatly simplified, so that the material consumption of the fixed turret is reduced, and the heat dissipation performance is enhanced. In addition, when the rotary table works, the load on the rotary table is directly transmitted to the fixed rotary tower through the rotary table frame and is transmitted to the supporting legs through the connecting arms, the force transmission path is short, and the generated vibration is small; meanwhile, the vibration caused by the impact generated by the movement of the concrete piston is relatively small, and the vibration resistance of the fixed turret is enhanced.

Therefore, the fixed turret with the structure can also play a role in connecting a rotary table and supporting legs of engineering machinery, and has the characteristics of simple and compact structure, strong shock resistance and good heat dissipation.

In a specific embodiment, the first driving member may be a first swing cylinder disposed between the fixed turret and the base end arm section, and the second driving member may be a second swing cylinder and a link mechanism disposed between the base end arm section and the end arm section, so as to drive the adjacent arm sections to be unfolded at 180 °.

When the engineering machinery is transferred and arrives at a working place, and the supporting leg device needs to be unfolded to support the engineering machinery, the supporting leg device is in a folded state, at the moment, the first swing oil cylinder is driven to enable a piston rod of the first swing oil cylinder to extend outwards, so that the root end arm section is driven to be unfolded relative to the fixed rotating tower, the second swing oil cylinder is driven to enable the piston rod of the second swing oil cylinder to extend outwards, so that the tail end arm section is driven to be unfolded relative to the root end arm section, and the supporting leg device can be stretched to a half-stretching state; the first swing oil cylinder and the second swing oil cylinder extend forwards continuously, and when the support leg device extends to the limit position, the support leg device achieves an unfolding state under the combined action of the second swing oil cylinder and the connecting rod mechanism, namely the adjacent arm sections are unfolded at 180 degrees.

Therefore, the supporting leg is flexible in unfolding mode, different combined motions can be selected according to the field conditions, a proper supporting point can be conveniently found in a construction site, all sections of arms of the supporting leg can move simultaneously, and the time consumed for unfolding and retracting the supporting leg is short; the expansion amplitude of the supporting leg can be selected according to the working condition requirement in the practical application scene, so that the supporting area of the supporting leg is adjusted; when the area occupied by the gravity center circle is large in the working state of the engineering machinery, for example, an ultra-long arm support concrete pump truck, the expansion amplitude of the supporting legs needs to be increased so as to obtain a large supporting area, so that the engineering stability of the engineering machinery is stronger to avoid side turning; of course, for the engineering machinery with smaller area occupied by the gravity center circle in the working state, the requirement on working stability can be met only by controlling the supporting legs to be in the half-unfolded state so as to meet the concrete construction in a narrow space. In addition, the supporting leg device provided by the invention can be used for carrying out unilateral support according to the requirements of specific construction environments.

Drawings

Fig. 1 is a schematic structural view of a fixed turret of a construction machine according to the related art;

fig. 2 is a schematic structural diagram of a leg device of a construction machine in the prior art;

FIG. 3 is a schematic structural diagram of an embodiment of a construction machine according to the present disclosure;

FIG. 4 is a schematic structural view of one embodiment of the fixed turret of FIG. 3;

FIG. 5 is a schematic view of a first integral arm of the leg rest of FIG. 4;

FIG. 6 is a schematic view of a second integral arm of the leg rest of FIG. 4;

FIG. 7 is a schematic structural view of the X-shaped upper cover plate in FIG. 4;

FIG. 8 is a schematic structural view of the X-shaped lower cover plate in FIG. 4;

FIG. 9 is a schematic diagram of the support arm of FIG. 4;

FIG. 10 is a schematic illustration of another embodiment of a stationary turret for a work machine according to the present disclosure;

FIG. 11 is a schematic illustration of an alternative embodiment of a stationary turret for a work machine according to the present disclosure;

FIG. 12 is a schematic diagram of an embodiment of the leg assembly of FIG. 3;

FIG. 13 is a top plan view of the leg assembly of FIG. 12 in a folded condition;

FIG. 14 is a top plan view of the leg assembly of FIG. 12 in a semi-extended position;

FIG. 15 is a top view of the leg assembly of FIG. 12 in a deployed condition;

FIG. 16 is a top view of the support mechanism of the work machine of FIG. 3 in an operational state;

FIG. 17 is a front view of FIG. 16;

FIG. 18 is a top view of the support mechanism of the work machine of FIG. 3 in a transport position;

FIG. 19 is a front view of FIG. 18;

fig. 20 is a schematic structural diagram of another embodiment of a leg device of a construction machine according to the present invention.

Wherein,

the correspondence between the component names and reference numerals in fig. 1 is:

a swing leg mount 1 "; a telescopic leg mounting base 2';

the correspondence between the component names and reference numerals in fig. 2 is:

a front leg arrangement 1'; a support arm 11'; a standard arm 12'; a connecting arm 13'; a leg frame 14'; a rear leg unit 2'; a body 3';

the correspondence between the part names and reference numerals in fig. 3 to 20 is:

a leg device 1; a horizontal leg 11; a first support leg 12; a drive member 13; a root end arm segment 111; an end arm segment 112; a vertical pin 113; a first swing cylinder 131; a second swing cylinder 132; the first link 133; a second link 134; an inner sleeve 1121; an outer sleeve 1122;

a rear leg device 2; a straight-bar type leg 21; a second support leg 22;

a turntable 3; a chassis 4;

a fixed turret 5; a turntable base 51; a connecting arm 52; a support arm 53; a mounting bracket 511; a first vertical plate 521; a second riser 522; a third upright plate 529; a fourth riser 520; a first notch 5211; the second slot 5201; a reinforcing plate 523; a transverse plate 524; a rib plate 525; an X-shaped upper cover plate 526; an X-shaped lower cover plate 527; an intermediate arm 528; a first through hole 5241; a second through hole 5261; and a third through hole 5271.

Detailed Description

The core of the invention is to provide an engineering machine, wherein the fixed turret and the supporting leg device are simple in structure and convenient to process and manufacture, and the fixed turret also has the characteristics of small volume, light weight and good shock resistance and diffusivity.

In order to make the technical solutions of the present invention better understood by those skilled in the art, the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments.

Referring to fig. 3, fig. 4 and fig. 12, fig. 3 is a schematic structural diagram of an embodiment of a construction machine according to the present invention; FIG. 4 is a schematic structural view of one embodiment of the fixed turret of FIG. 3; fig. 12 is a schematic structural view of an embodiment of the leg device in fig. 3.

In one embodiment, as shown in the drawings, the present disclosure provides a construction machine including a chassis 4 and a fixed turret 5 mounted on the chassis 4. The fixed turret 5 is connected with a support leg device 1, the fixed turret 5 comprises a rotating platform frame 51, the rotating platform frame 51 is connected with a rotating platform of the engineering machinery, the fixed turret further comprises a support leg frame fixed below the rotating platform frame 51, the support leg frame comprises at least two connecting arms 52, and the outer ends of the connecting arms 52 are respectively hinged with support legs of the engineering machinery; any adjacent two of the connection arms 52 intersect, or the extended lines of any adjacent two of the connection arms 52 intersect.

The support leg device of the engineering machinery comprises a horizontal support leg 11 and a first support leg 12 connected to the tail end of the horizontal support leg 11, wherein the horizontal support leg 11 is used for setting a support area, and the first support leg 12 is used for supporting the horizontal support leg 11 on the ground; the horizontal leg 11 comprises at least two arm sections, each arm section is hinged in turn, the base end arm section 111 is hinged with the leg support, and the first support leg 12 is connected to the end of the end arm section 112 in each arm section. The leg device further comprises a driving part 13, wherein the driving part 13 comprises a first driving part arranged between the leg frame and the root end arm section 111 and used for driving the root end arm section to unfold and fold, and a second driving part arranged between any two adjacent arm sections and used for driving the adjacent arm sections to unfold and fold.

By adopting the fixed turret with the structure, in the working process, the rotary table 3 of the engineering machinery is connected with the rotary table frame 51 in a rotary mode, the horizontal supporting legs 11 are hinged with the supporting leg frames, the rotation of the arm support and the supporting effect on the whole machine can be realized, and compared with the fixed turret with a box-shaped structure in the prior art, the fixed turret with the structure has the advantages that the structure is greatly simplified, the material consumption of the fixed turret is reduced, and the heat dissipation performance is enhanced. In addition, when the rotary table is in operation, the load on the rotary table 3 of the engineering machinery is directly transmitted to the fixed turret 5 through the rotary table frame 51 and is transmitted to the support legs through the support leg frame, the force transmission path is short, and the generated vibration is small; meanwhile, the vibration caused by the impact generated by the movement of the concrete piston is relatively small, and the vibration resistance of the fixed turret is enhanced.

In a specific embodiment, the first driving member of the horizontal leg 11 may be a first swing cylinder 131 disposed between the fixed turret 5 and the base arm section 111, and the second driving member may be a second swing cylinder 132 and a link mechanism disposed between two adjacent arm sections, so as to drive the adjacent arm sections to be unfolded at 180 °.

By adopting the hinged folding leg support device, taking a horizontal leg support only comprising the root end arm section 111 and the tail end arm section 112 as an example, when the engineering machinery is transferred to a working place and needs to be unfolded to support the engineering machinery, the leg support device is in a folding state as shown in fig. 13, at this time, the first swing oil cylinder 131 is driven to extend the piston rod outwards, so that the root end arm section 111 is driven to be unfolded relative to the fixed turret 5, and the second swing oil cylinder 132 is driven to extend the piston rod outwards, so that the tail end arm section 112 is driven to be unfolded relative to the root end arm section 111, so that the leg support device can be extended to a half-extension state as shown in fig. 14; the first swing cylinder 131 and the second swing cylinder 132 are extended forward, and when the leg device is extended to the limit position, the leg device is extended as shown in fig. 15, that is, the adjacent arm sections are extended by 180 ° due to the cooperation of the second swing cylinder 132 and the link mechanism.

Therefore, the expansion amplitude of the supporting leg can be selected according to the working condition requirement in the practical application scene, so that the supporting area of the supporting leg can be adjusted; when the area occupied by the gravity center circle is large in the working state of the engineering machinery, for example, an ultra-long arm support concrete pump truck, the expansion amplitude of the supporting legs needs to be increased so as to obtain a large supporting area, so that the engineering stability of the engineering machinery is stronger to avoid side turning; of course, for the engineering machinery with smaller area occupied by the gravity center circle in the working state, the requirement on working stability can be met only by controlling the supporting legs to be in the half-unfolded state so as to meet the concrete construction in a narrow space. In addition, the supporting leg device provided by the invention can be used for carrying out unilateral support according to the requirements of specific construction environments. When the horizontal support leg is unfolded to a predetermined position, the first support leg 12 is driven to be supported downwards on the ground, so that the engineering machinery is supported. When the engineering machinery finishes operation and is about to transport, the supporting leg device is operated reversely, and then the supporting leg device can be changed from the unfolding state to the folding state.

In addition, the supporting leg device with the structure has flexible expansion mode, different combined motions are selected according to the field conditions, the expansion angle between every two adjacent arm sections can be adjusted at will, and a proper supporting point can be found conveniently in a construction site; and each arm section of the supporting leg can swing simultaneously, so that the movement time of expansion or contraction of the horizontal supporting leg is greatly saved, and the working efficiency of the engineering machinery is improved.

It can be seen from the above working process that the supporting leg device with the structure can flexibly unfold the horizontal supporting leg 11 which is hinged in parallel only by operating the first driving part and the second driving part, and in the unfolding process, an operator can select a proper angle, length and supporting area according to the working condition.

It should be noted that the above embodiments do not specifically limit the specific structural form of the leg support, nor the connection manner of the fixed turret 5 and the concrete pump truck chassis, and in fact, all the fixed turrets that adopt the connecting arm 52 to connect the legs, so as to simplify the structure and enhance the shock resistance and heat dissipation are within the protection scope of the present invention.

In addition, the above-mentioned landing leg device 1 can only include two arm sections of root end arm section 111 and terminal end arm section 112, can also include a plurality of arm sections, and all arm sections are all parallel articulated, can suitably increase the length of horizontal landing leg 11 according to factors such as actual work topography condition and concrete pumping height like this to select suitable support area, support the mobile concrete pump at the most stable operating condition, improve the job stabilization nature of mobile concrete pump. The "support area" referred to herein is an area surrounded by the bottom ends of the first support legs 12 of the plurality of leg units 1, that is, an area for the construction machine support mechanism to hold the ground, and is not an area of the ground actually contacted by the first support legs 12 of the respective leg units 1.

Furthermore, the "root end" as appearing herein refers to the end near the fixed turret 5, and the "root end arm section" refers to the arm section of the horizontal leg 11 closest to the fixed turret 5; "end" refers to the end of the fixed turret 5 and "end arm segment" refers to the arm segment of the horizontal leg 11 that is furthest from the fixed turret 5; it should be understood that the definitions of these terms are determined with reference to the drawings, and their presence should not affect the scope of the present invention.

A specific configuration of the above-described leg frame for fixing the turret 5 may be further provided.

Referring to fig. 5 and 6, fig. 5 is a schematic structural view of a first integrated arm of the leg rest of fig. 4; fig. 6 is a schematic view of the overall structure of the second integral arm of the leg rest of fig. 4.

In another embodiment, as shown in fig. 5 and 6, the number of the connecting arms 52 is four, and four connecting arms 52 intersect to form an X-shaped structure; in the X-shaped leg frame, two of the oppositely disposed connecting arms 52 are integrally formed first integral arms, and the other two of the oppositely disposed connecting arms 52 are integrally formed second integral arms.

In a specific scheme, the first integral arm is surrounded by the first vertical plate 521, the second vertical plate 522, the first upper cover plate and the first lower cover plate, and the first integral arm is provided with a first notch 5211; the second integral arm is surrounded by a third vertical plate 529, a fourth vertical plate 520, a second upper cover plate and a second lower cover plate, and the second integral arm is provided with a second notch 5201; at the crossing position of the X-shaped leg frame, the first notch 5211 is engaged with the second notch 5201. By adopting the structure, the integral arm formed by the two vertical plates and the two cover plates can ensure the strength of hinging with the supporting leg, and has the characteristics of simple structure, light weight and convenient processing and manufacturing processes. In addition, the fixing property of the relative position of the first integral arm and the second integral arm can be ensured through the structure that the first notch 5211 and the second notch 5201 are matched and clamped, so that the four connecting arms 52 are positioned on the same horizontal plane, and the working stability of the X-shaped supporting leg frame is improved.

The two connecting arms 52 which are oppositely arranged are arranged into an integrated structure, so that the fixed turret is compact in structure and high in strength, the whole force applied to the fixed turret is smoother in work, and the force transmission path is further shortened, so that the shock resistance and the structural reliability of the fixed turret are further enhanced. Of course, the first integral arm and the second integral arm are not limited to the specific structural form, and may be integral arms having other structures.

In addition to the above structure, a specific structural form of the leg rest may be further provided. Referring to fig. 7 and 8, fig. 7 is a schematic structural view of the X-shaped upper cover plate in fig. 4; fig. 8 is a schematic structural view of the X-shaped lower cover plate in fig. 4.

In a further aspect, the first upper cover plate and the second upper cover plate may be an integrally formed X-shaped upper cover plate 526, and the first lower cover plate and the second lower cover plate may be an integrally formed X-shaped lower cover plate 527. In a specific scheme, first vertical plate 521 and second vertical plate 5252 can be enclosed into a first barrel-shaped structure, and third vertical plate 529 and fourth vertical plate 520 can be enclosed into a second barrel-shaped structure; a first notch 5211 which is opened upwards is arranged at the corresponding position of the first vertical plate 521 and the second vertical plate 5252, and a second notch 5201 which is opened downwards is arranged at the corresponding position of the third vertical plate 529 and the fourth vertical plate 520; then, the first barrel-shaped structure and the second barrel-shaped structure are clamped at the positions of the first notch 5211 and the second notch 5201 in a matching manner to form an X-shaped barrel-shaped structure; and finally, correspondingly installing an X-shaped upper cover plate 526 and an X-shaped lower cover plate 527 on the upper side and the lower side of the X-shaped barrel-shaped structure, and finally forming the X-shaped leg support. Thus, the X-shaped upper cover plate 526 and the X-shaped lower cover plate 527 respectively cover the upper end surface and the lower end surface of the leg rest, so that the strength of the connecting arm 52 is further increased, the structure of the connecting arm is more compact and reasonable, a larger supporting force can be provided during operation, and the strength and the shock resistance of the connecting arm are further enhanced.

In a further aspect, a second through hole 5261 and a third through hole 5271 may be further disposed at the intersection of the X-shaped upper cover plate 526 and the X-shaped lower cover plate 527. When the swing device installed in the turret frame 51 is hydraulically controlled, a delivery line of the swing device or the like may be provided in a passage formed by the second through hole 5261 and the third through hole 5271 below the turret frame 51. The arrangement mode enables the fixed turret to contain more accommodating spaces, and has the advantage of reasonable structural layout.

In particular, the term "X-shape" as used herein is intended to describe macroscopically the shape of a leg frame formed by the intersection of four connecting arms 52, and does not refer to an X-shape in which two opposite angles are equal in a geometric sense, but includes a general "X-shape" in which four angles are equal, two opposite angles are equal, or four angles are unequal. Therefore, in the X-shaped leg frame formed by intersecting the four connecting arms 52, two opposite connecting arms 52 may be linearly arranged, or two opposite connecting arms 52 may be arranged in a broken line; in the above-mentioned embodiment in which the two connecting arms 52 are integrally formed, one integral arm may be set to be in a straight line shape, or may be set to be in a broken line shape, so that the user can select the specific form of the X-shaped leg frame according to his own needs and the actual working environment.

In addition, the front end of the rotating platform frame 51 can be welded with an installation frame 511 for connecting a speed reducer of the engineering machinery, so that the speed reducer can be directly installed at the front end of the rotating platform frame 51, and the installation of the speed reducer is facilitated.

In a further aspect, a plurality of rib plates 525 may be further fixed between the first vertical plate 521 and the second vertical plate 522, and a plurality of rib plates 525 may be further fixed between the third vertical plate 529 and the fourth vertical plate 520. The rib plate 525 can further increase the strength of the connecting arm 52, and ensure the working stability and reliability of the connecting arm.

In another specific embodiment, the first integral arm and the second integral arm are provided with a landing leg mounting seat at two ends, and the landing legs are hinged on the landing leg mounting seats. Specifically, the leg mounting base includes the transverse plate 524 that extends outward and is located the upper and lower both sides at first integral arm and second integral arm both ends, is equipped with the first through-hole 5241 that is used for the round pin axle of articulated leg on the transverse plate 524. By adopting the structure, when the supporting leg needs to be installed on the fixed turret, the installation of the supporting leg and the fixed turret can be conveniently realized only by placing the end part of the supporting leg between the transverse plates 524 at the upper side and the lower side, inserting the vertical pin shaft penetrating through the supporting leg into the first through hole 5241 and matching with a matched limiting component for limiting the pin shaft to move up and down, and the dismounting process is opposite. Therefore, the supporting leg mounting base with the simple structure can conveniently realize the mounting and dismounting of the supporting leg, and the fixed turret and the supporting leg are hinged in a simpler mode. Of course, the leg mounting seat is not limited to this structure, and may have other structures.

The specific structural form of the supporting leg frame can be further set.

In another embodiment, the X-shaped leg frame is not limited to the structure that includes four connecting arms 52 integrally formed with each other, and the four connecting arms may be independent structures. The user can select the required items.

In another embodiment, the fixed turret may also comprise only two connecting arms 52, i.e. a part of the fixed turret still adopts a box-shaped structure of the prior art and two connecting arms 52 are connected thereto, in particular, two connecting arms 52 may be provided at the front, rear, left or right side of the fixed turret. Compared with the prior art, the structure for fixing the turret is simplified, and the leg frames of the structure can also realize the functions of reducing the force transmission path, reducing the vibration and enhancing the heat dissipation performance.

In another embodiment, the leg frame may include only two connecting arms 52, and the two connecting arms 52 may be disposed on the front, rear, left or right sides of the fixed turret. The leg support with the structures can also realize the functions of reducing force transmission paths, reducing vibration and enhancing heat dissipation.

In another embodiment, as shown in FIG. 10, FIG. 10 is a schematic structural view of another embodiment of a stationary turret provided in accordance with the present invention; the number of the connecting arms 52 is four, wherein two connecting arms 52 intersect at a first connecting point, and the other two connecting arms 52 intersect at a second connecting point; the connecting device further comprises a middle arm 528, and both ends of the middle arm 528 are respectively connected with the first connecting point and the second connecting point.

The structure that the middle arm 528 is connected with each connecting arm 52 can ensure the connection stability of each connecting arm 52, the length of the fixed turret along the length direction of the middle arm 528 can be properly lengthened, and the structure is suitable for engineering machinery with different parameter requirements, so that the length of each supporting leg can be properly shortened when the engineering machinery achieves the same supporting area, and the effect of saving the production cost is achieved.

In another embodiment, as shown in FIG. 11, FIG. 11 is a simplified structural illustration of yet another more specific embodiment of a stationary turret provided in accordance with the present invention; the number of the connecting arms 52 of the leg frame is four, the end of any connecting arm 52 is connected to the middle of the first adjacent connecting arm, the end of the second adjacent connecting arm is connected to the middle of the connecting arm, and the four connecting arms 52 enclose a quadrangle.

With this structure, each link arm 52 is connected to its adjacent link arms at a plurality of places, and the strength and the working stability of the leg rest can be further ensured. It should be noted that the "middle portion of the link arm" herein does not refer to the middle portion of the link arm, but refers to an arbitrary position except for both end points of the link arm.

Referring to fig. 9, fig. 9 is a schematic structural diagram of the support arm in fig. 4.

In another embodiment, as shown in fig. 9, a support arm 53 is connected to the lower portion of the leg frame; the lower end of the support arm is supported to the chassis 4. With this structure, the four support arms 53 support the leg frames of the fixed turret 5 at a certain height, which forms a hollow structure in the middle of the four leg frames, which greatly enhances the ventilation and heat dissipation of the fixed turret 5, and the space formed by the four leg frames can be used for placing other components with small volume, such as an oil tank. Therefore, the fixed turret 5 with the structure has the advantages of compact structure, reasonable layout and capability of enhancing the ventilation and heat dissipation performance of the fixed turret.

Of course, the above-mentioned embodiment does not limit the specific supporting manner of the supporting arm 53 to be supported on the chassis of the concrete pump truck, and it may be fixedly connected by welding, or may be fixedly connected to the chassis by bolts or the like. The fixed turret 5 is not limited to the above-described structure, and for example, the lower end surface of the leg frame of the fixed turret 5 may be directly welded to the chassis 4, so that the vertical height of the fixed turret 5 is low, the working center of gravity of the concrete pump truck is further lowered, and the concrete pump truck has good working stability.

In another embodiment, in a leg rest comprising four connecting arms 52, the above-mentioned gantry 1 can be fixedly connected to all four connecting arms 52. Thus, the turret frame 51 is connected to the leg frame at a plurality of positions, and the strength of fixing the turret can be further enhanced, thereby ensuring the operational stability thereof.

In a specific embodiment, the turntable frame 51 and the leg frame may be fixedly connected. For example, both may be welded together. In summary, all the components of the fixed turret 5 can be fixedly connected to the adjacent components thereof by welding, and the fixed turret 5 welded integrally has the advantages of simple structure and convenience in machining and manufacturing, ensures that the fixed turret 5 has high strength, and can save a large number of connecting assemblies such as bolts and nuts. Of course, the fixed turret 5 may also be fixedly connected by bolting adjacent components, and this fixed connection has the characteristic of being easy to detach.

In a further aspect, a reinforcing plate 523 may be fixed between each two adjacent connecting arms 52 in the leg frame. Similar to the role of the rib plate 525, the reinforcing plate 523 can further enhance the strength of the leg support and ensure the working stability of fixing the turret in the rotation process of the turntable.

The concrete connection mode of the link mechanism can be further set.

More specifically, as shown in fig. 12, two of the two adjacent arm sections are defined as a first adjacent arm section and a second adjacent arm section, which are hinged by a pin 113, and the first adjacent arm section is close to the fixed turret 5 of the construction machine; the link mechanism includes a first link 133 and a second link 134; one end of the second swing cylinder 132 is hinged to the root end of the first adjacent arm section, the other end thereof is hinged to the root end of the second adjacent arm section through a second connecting rod 134, one end of the first connecting rod 133 is hinged to the second connecting rod 134, and the other end thereof is hinged to the tail end of the first adjacent arm section.

By adopting the connection mode of combining the hydraulic cylinder and the link mechanism, the link mechanism also plays a role of supporting the tail end of the root end arm section 111 while the swing oil cylinder drives the tail end arm section 112 to fold or unfold relative to the root end arm section 111, so that the tail end arm section 112 moves more flexibly relative to the root end arm section 111, and the working stability and flexibility of the supporting leg device are enhanced.

Of course, the link mechanism is not limited to the above connection manner, and the first link 133, the second link 134, and the second swing cylinder 132 may be hinged to the same hinge shaft. All leg devices that realize the 180-degree unfolding of two adjacent arm sections through the second swing cylinder 132 and the link mechanism are within the protection scope of the present invention.

In particular, the driving mechanism of the leg device is not limited to the swing cylinder, and in another specific embodiment, the first driving member and/or the second driving member may be a gear transmission mechanism driven by a hydraulic motor. For example, when a hydraulic motor is connected to the fixed turret 5, a drive gear is connected to an output shaft of the hydraulic motor, the drive gear engages with a driven gear connected to the base arm segment 111, and the output rotation speed of the hydraulic motor is transmitted by the power of the gear mechanism, and the base arm segment 111 can be driven to unfold or fold with respect to the fixed turret 5. Of course, the driving member 13 may have other structures, such as a chain transmission mechanism driven by a hydraulic motor to realize the unfolding or folding of each arm section, and the driving member 13 capable of driving the horizontal leg 11 to fold or unfold relative to the fixed turret 5 is within the protection scope of the present invention.

It is further possible to provide a specific folding of the horizontal leg 11 of the leg arrangement described above.

In another embodiment, as shown in FIG. 18, FIG. 18 is a top view of the support mechanism of the work machine of FIG. 3 in a transport state; the root end of the root end arm section 111 is hinged to the front side of the leg support, and when the horizontal leg support 11 is in a folded state, the tail end of the root end arm section 111 is arranged on one side close to the tail of the vehicle, and the tail end arm section 112 is hinged to the outer side of the root end arm section 111.

By adopting the folding mode, when the engineering machinery needs to unfold the leg device, as shown in fig. 13, 14 and 15, and taking the left lower horizontal leg in fig. 18 as an example, the first swing cylinder 131 is driven to extend the length thereof, and the base end arm section 111 rotates clockwise relative to the fixed turret 5 to unfold; at the same time, the second swing cylinder 132 can be driven to extend its length, and the end arm section 112 is rotated counterclockwise to be deployed with respect to the root arm section 111.

Compared with the folding mode that the tail end arm section 112 needs to draw a larger circular arc when the horizontal leg 11 is unfolded, the horizontal leg 11 with the folding mode has the advantage of saving space, so that the engineering machinery can still be freely unfolded and folded in a smaller working place, and the working adaptability of the engineering machinery is greatly enhanced. In addition, the root end of the root end arm section 111 is hinged to the front side of the fixed turret 5, and the tail end of the root end arm section 111 is arranged at the rear side of the root end, so that when the horizontal support leg 11 is unfolded, the root end arm section 111 is unfolded at the rear side of the cab of the engineering machinery relative to the fixed turret 5, and does not interfere with the cab, and the horizontal support leg has the advantage of reasonable spatial layout.

Of course, the horizontal leg 11 is not limited to the folding manner of the above structure, and may be other folding manners.

It should be noted that the term "front" appearing herein refers to a direction in which the tail of the work machine is directed to the head of the work machine, i.e., a direction from right to left in fig. 18; the opposite is true for the orientation word "rear", i.e., from left to right in FIG. 18; in addition, "clockwise" and "counterclockwise" are also set forth based on the specific drawings, and their presence should not affect the scope of the present invention.

The specific structure of the horizontal leg 11 can be further provided. Referring to fig. 20, fig. 20 is a schematic structural diagram of another embodiment of a leg device of a construction machine according to the present invention.

In another embodiment, at least one of the arm sections of the leg device 1 is a telescopic arm section. As shown in fig. 20, the end arm segment 112 of the horizontal leg 11 is a telescopic arm segment, which includes an outer sleeve 1122 and an inner sleeve 1121, the inner sleeve 1121 telescopically fits inside the outer sleeve 1122, and the telescopic arm segment further includes a third driving means for driving the inner sleeve 1121 to move inside the outer sleeve 1122. In this way, after the arm sections are relatively unfolded, the inner sleeve 1121 can be extended outwards relative to the outer sleeve 1122, so that a larger supporting area is realized, and the working stability of the concrete pump truck is further enhanced. Of course, other arm sections may be arranged as telescopic arm sections in the horizontal leg 11.

In a more specific scheme, the telescopic arm section may be a tail end arm section, and of course, may also be a root end arm section or any middle arm section hinged between the root end arm section and the tail end arm section.

The specific structural form of the support leg device of the engineering machinery can be further set.

Referring to fig. 16 to 19, fig. 16 is a top view of the supporting mechanism of the engineering machine of fig. 3 in a working state; FIG. 17 is a front view of FIG. 16; FIG. 18 is a top view of the support mechanism of the work machine of FIG. 3 in a transport position; fig. 19 is a front view of fig. 18.

Further, the number of the leg devices 1 adopted by the concrete pump truck can be two, and the two leg devices 1 are symmetrically arranged on the front side of the fixed turret 5.

Besides, the engineering machinery can further comprise two rear leg devices 2, each rear leg device 2 comprises a straight rod type leg 21 and a second leg 22 arranged at the tail end of the straight rod type leg 21, and the two straight rod type legs 21 are symmetrically hinged to the rear side of the fixed turret 5; on the same side of the fixed turret 5, the distance between the pivot points of the leg device 1 and the rear leg device 2 on the fixed turret 5 is greater than the distance between the pivot points of the two leg devices 1 on the fixed turret 5.

The engineering machinery with the hinged folding type supporting leg device 1 on the front side supporting leg and the straight rod type supporting leg 21 on the rear side supporting leg fully utilizes the space in the length direction of the engineering machinery, ensures that the width of the whole concrete pump truck cannot exceed the width of the chassis, and has the advantages of compact structure, reasonable layout and lower manufacturing and processing cost. Of course, the leg device 1 is not limited to be installed on the front side of the concrete pump truck, and the hinged folding leg device may be used for all four legs of the concrete pump truck.

In addition, adopt this kind of with the landing leg device 1 rather than the great landing leg structure of distance setting between the back landing leg device 2 of homonymy, when the concrete pump truck is in the operation of other special terrain environment such as its left and right sides gradient is great, can expand the preceding landing leg device 1 of its unilateral, back landing leg device 2, and the preceding landing leg device of opposite side, back straight-bar type landing leg 21 still keep fold condition to locate fixed capstan head 5 one side, thereby realize unilateral support function, avoided among the prior art because the preceding landing leg of homonymy is too close to the back landing leg distance and can't realize unilateral support defect, further enlarged the application range of concrete pump truck, strengthen its job stabilization nature and reliability.

In another embodiment, the two horizontal legs 11 and the two straight-bar-type legs 21 are hinged to four corners of the fixed turret 5 by vertical pins 113, and the vertical heights of the four legs are the same. By adopting the structure, the supporting legs arranged at four corners of the fixed turret 5 cannot be arranged in a crossed manner, compared with a plurality of supporting leg devices 1 which are stacked in a crossed manner (such as X-shaped) and arranged in two layers in the prior art, the supporting mechanism only comprises a single-layer supporting leg device 1, so that the cross section height of the arm section of the horizontal supporting leg 11 can be increased by utilizing a vertical space, the stress borne by the supporting leg during supporting is effectively reduced, and the working stability of the concrete pump truck is further increased; in addition, compared with the existing X-shaped equal-leg device, the length of the leg of the invention is not limited by the width of a concrete pump vehicle, so that the length of the supporting mechanism can be properly lengthened, and therefore, the engineering machinery with the structure has the advantages of compact structure and reasonable layout.

More specifically, the construction machine may be a concrete pump truck. It should be noted that, the above embodiment only takes a concrete pump truck as an example to specifically describe the beneficial technical effects of the engineering machine including the leg device 1, and in fact, the leg device 1 is not limited to be used in a concrete pump truck, and may also be used in other engineering machines such as a crane.

The construction machine provided by the invention is described in detail above. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.

Claims

1. A construction machine, comprising a chassis (4) and a fixed turret (5) arranged on the chassis (4), the fixed turret (5) is connected with a leg device (1), the support The leg device (1) includes a horizontal leg (11) and a first support leg (12) connected to the end of the horizontal leg (11); it is characterized in that,

The fixed turret (5) includes a turntable frame (51), the turntable frame (51) is connected with the turntable (3) of the construction machine, and also includes a Outrigger frame, the outrigger frame includes at least two connecting arms (52), the outer ends of each connecting arm (52) are respectively hinged with the horizontal outrigger (11); any two adjacent The connecting arms (52) intersect, or the extension lines of any two adjacent connecting arms (52) intersect;

The horizontal support leg (11) includes at least two sequentially hinged arm sections, and any two adjacent arm sections are provided with a second drive component that drives the adjacent arm sections to unfold and fold; each arm section , the root end arm section (111) is hinged to the connecting arm (52), and a first driving part is provided between the two to drive the root end arm section (111) to unfold and fold, and the first The supporting legs (12) are connected to the end of the terminal arm section (112) in each arm section; the number of the connecting arms (52) is four, and the four connecting arms (52) intersect to form an X-shaped leg frame; The two oppositely arranged connecting arms (52) are integrally formed first integral arms, and the other two oppositely arranged said connecting arms (52) are integrally formed second integral arms; the first integral arms are composed of The first vertical plate (521), the second vertical plate (522), the first upper cover plate and the first lower cover plate are surrounded, and the first integral arm is provided with a first notch (5211);

The second integral arm is surrounded by the third vertical plate (529), the fourth vertical plate (520), the second upper cover plate and the second lower cover plate, and the second integral arm is provided with a second notch (5201);

At the intersection position of the X-shaped outrigger frame, the first notch (5211) and the second notch (5201) are snapped together.

2. The construction machine according to claim 1, characterized in that the first upper cover and the second upper cover are integrally formed X-shaped upper cover (526), and the first lower cover An X-shaped lower cover (527) formed integrally with the second lower cover.

3. The construction machine according to claim 2, characterized in that a second through hole (5261) is provided at the cross connection of the X-shaped upper cover plate (526), and the X-shaped lower cover plate (527) A third through hole (5271) is provided at the cross-connection.

4. The engineering machine according to claim 1, characterized in that, both ends of the first integral arm and the second integral arm are provided with outrigger mounts; the outrigger mounts include The horizontal plate (524) protruding outwards on the upper and lower sides of the first integral arm and the two ends of the second integral arm, the horizontal plate (524) is provided with a first hinge for the legs Through hole (5241).

5. The construction machine according to claim 1, characterized in that, the number of the connecting arms (52) is four, wherein two of the connecting arms (52) intersect at the first connecting point, and the other two are intersected at the first connecting point. The connecting arm (52) intersects at the second connecting point; an intermediate arm (528) is also included, and the two ends of the intermediate arm (528) are respectively connected to the first connecting point and the second connecting point.

6. The construction machine according to claim 1, characterized in that, the number of the connecting arms (52) is four, and the end of any one of the connecting arms (52) is connected to its first adjacent connecting arm The middle part of the connecting arm, the end of the second adjacent connecting arm is connected to the middle part of the connecting arm, so that the four connecting arms (52) form a quadrilateral.

7. The construction machine according to any one of claims 1-6, characterized in that a support arm (53) is connected below the outrigger frame, and the bottom end of the support arm (53) is connected to the The chassis (4) is fixedly connected.

8. The construction machine according to any one of claims 1-6, characterized in that the turntable frame (51) is fixedly connected to the four connecting arms (52).

9. The construction machine according to any one of claims 1-6, characterized in that, the second driving part includes a second swing cylinder (132) and a link mechanism, so that the adjacent boom sections can be driven Spread out at 180°.

10. The construction machine according to claim 9, characterized in that, among the two adjacent boom sections, the first adjacent boom section and the second adjacent boom section are hinged by pin shafts (113), and the first adjacent The boom section is close to the fixed turret (5); the link mechanism includes a first link (133) and a second link (134); one end of the second swing cylinder (132) is connected to the first The root end of the adjacent arm section is hinged, the other end of which is hinged to the root end of the second adjacent arm section through the second connecting rod (134), and one end of the first connecting rod (133) is hinged to the The second connecting rod (134), the other end of which is hinged to the end of the first adjacent arm section.

11. The construction machine according to any one of claims 1-6, characterized in that, the horizontal outrigger (11) includes two jib sections, respectively the root end jib section (111) and the end jib section The boom section (112), and the two are hinged through the pin shaft (113); the root end of the root end boom section (111) is hinged on the side of the connecting arm (52) close to the front of the car, and the horizontal support leg (11 ) is in the folded state, the end of the root boom section (111) is located on the side close to the rear of the vehicle, and the end boom section (112) is hinged to the outside of the root boom section (111).

12. The construction machine according to any one of claims 1-6, characterized in that there is at least one telescopic boom section in each boom section of the horizontal outrigger (11), and the telescopic boom section includes a jacket a sleeve (1122), an inner sleeve (1121) disposed inside the outer sleeve (1122), and a third drive capable of driving the inner sleeve (1121) to move inside the outer sleeve (1122) part.

13. The construction machine according to any one of claims 1-6, characterized in that the number of the outrigger devices (1) is two, and the two outrigger devices (1) are symmetrically arranged on the Fix the front side of the turret (5);

The construction machine also includes two rear outrigger devices (2), and the rear outrigger device (2) includes a straight-rod outrigger (21) and a second end of the straight-rod outrigger (21). Two support legs (22), two straight rod type legs (21) are symmetrically hinged on the rear side of the fixed turret (5);

On the same side of the fixed turret (5), the distance between the hinge points of the outrigger device (1) and the rear outrigger device (2) on the fixed turret (5) is greater than The distance between the hinge points of the two outrigger devices (1) on the fixed turret (5).