Engineering chassis and engineering machinery

Abstract

The invention provides an engineering chassis and engineering machinery, comprising: a frame, a front leg mounted on the frame and close to the head end of the frame; the rear supporting leg is mounted at the tail part of the frame; the telescopic assembly is located between the front supporting leg and the rear supporting leg in the vehicle length direction of the vehicle frame and comprises two telescopic supporting legs arranged on the two sides of the vehicle frame in the vehicle width direction of the vehicle frame, the telescopic supporting legs can stretch out and draw back in the vehicle width direction, the supporting point connecting line of the two telescopic supporting legs is a transverse supporting point connecting line, and the supporting point connecting line of the front supporting leg and the rear supporting leg is a longitudinal supporting point connecting line. The transverse fulcrum connecting line is perpendicular to the longitudinal fulcrum connecting line. On the premise that the arrangement of the chassis is more compact, the supporting performance is stronger, the mass of the chassis can be effectively reduced under the same stability performance, so that the mass of the whole engineering machinery is reduced, the performance of a crane is improved, and only one pair of telescopic supporting legs with a telescopic function needs an unfolding space, so that the engineering machinery can adapt to a narrow space.

Description

Technical Field

[0001] The present invention belongs to the technical field of engineering machinery, and in particular relates to an engineering chassis and engineering machinery. Background Art

[0002] With the development of large-scale projects and changes in the construction terrain environment, construction machinery such as wheeled cranes are increasingly widely used in various engineering construction projects due to their advantages such as convenient transfer operation, flexible operation and strong adaptability to working conditions. Wheeled cranes continue to develop in the direction of large tonnage, especially in recent years, large-tonnage wheeled cranes have become the main lifting equipment. As an important component of wheeled cranes, the outriggers have a great influence on the stability and lifting performance of wheeled cranes. With the increase in the tonnage of wheeled cranes, the weight and structural dimensions of the outriggers and the frame themselves also increase accordingly. Therefore, how to make the outriggers and the frame have both powerful performance and reduce weight has become the key point in the design of wheeled cranes.

[0003] In the prior art, an H-type outrigger layout or an X-type outrigger layout is usually adopted. In the H-type outrigger layout, two sets of outriggers are respectively arranged at both ends of the vehicle body, and the overall structure is similar to a bridge, which is equivalent to using the outriggers at both ends as fulcrums, and the vehicle body is a bridge between the two fulcrums; in order to ensure the supporting strength of the H-type outriggers, the vehicle body structure must be sturdy and stable, and the weight of the vehicle body is often very large, which leads to an increase in the total weight of the wheeled crane chassis, increases the manufacturing cost and weight of the wheeled crane, and weakens the driving performance of the wheeled crane.

[0004] The outriggers of the X-type outrigger layout are designed to be externally mounted on both sides of the vehicle body and are opened by swinging, presenting an X-shaped layout. The X-type outriggers have high requirements for the construction site. Since the outriggers need to swing when unfolded, the space around the wheeled crane station must be large enough to ensure the normal unfolding of the outriggers, which greatly affects the construction efficiency. Summary of the invention

[0005] The main purpose of the present invention is to provide an engineering chassis and an engineering machine, aiming to solve the technical problem in the prior art that the outrigger layout causes the engineering machine to be heavy and cannot adapt to a small space.

[0006] In order to achieve the above-mentioned purpose, the present invention provides an engineering chassis, which includes: a frame; a front leg installed on the frame and close to the head end of the frame; a rear leg installed on the tail of the frame; a telescopic assembly, which is located between the front leg and the rear leg along the vehicle length direction of the frame, and the telescopic assembly includes two telescopic legs arranged on both sides of the frame along the vehicle width direction of the frame, and the telescopic legs can be telescoped along the vehicle width direction, the fulcrum connection line of the two telescopic legs is a transverse fulcrum connection line, the fulcrum connection line of the front leg and the rear leg is a longitudinal fulcrum connection line, and the transverse fulcrum connection line is perpendicular to the longitudinal fulcrum connection line.

[0007] In the embodiment of the present invention, the two telescopic legs are staggeredly distributed along the vehicle length direction, and the rear leg is offset to the side of the frame relative to the center line of the frame.

[0008] In an embodiment of the present invention, the engineering chassis also includes a swing frame, one end of the swing frame is hinged to the tail of the frame, and the other end is connected to the rear support leg. The swing frame can swing back and forth between a folded position and an unfolded position relative to the frame. The swing frame in the folded position is folded onto the frame, and the swing frame in the unfolded position is unfolded relative to the frame, and the length direction of the swing frame is consistent with the length direction of the vehicle.

[0009] In the embodiment of the present invention, a rear mounting end surface is provided at the rear end of the frame, the swing frame is hinged to a swing point of the rear mounting end surface, and the swing point is provided close to a side surface of the frame in the vehicle width direction.

[0010] In an embodiment of the present invention, the two telescopic legs are coaxially and symmetrically arranged along the vehicle width direction, and the front leg and the rear leg are both located on the center line of the frame.

[0011] In an embodiment of the present invention, the engineering chassis also includes a swivel mounting seat installed on the frame and located between the front legs and the rear legs, the swivel mounting seat is used to install a swivel support, the telescopic assembly is arranged close to the swivel mounting seat along the vehicle length direction and is located below the swivel mounting seat, and the two telescopic legs are arranged on both sides of the swivel mounting seat.

[0012] In an embodiment of the present invention, the engineering chassis further comprises a plurality of load-bearing axles, which are mounted on the frame along the vehicle length direction, and the load-bearing axles are disposed on both the front and rear sides of the telescopic assembly.

[0013] In an embodiment of the present invention, the load-bearing axles are arranged on both the front and rear sides of the swivel mounting seat; and / or, the load-bearing axle close to the front end of the frame among the multiple load-bearing axles is the first axle, and the load-bearing axle adjacent to the first axle is the second axle, and the front support leg is located between the first axle and the second axle along the vehicle length direction.

[0014] In an embodiment of the present invention, the frame includes: a front section, the front legs are installed on the front section; a rear section connected to the front section, the rear section is a box-type structure, and the rear legs are installed on the rear section.

[0015] In an embodiment of the present invention, the front support leg is installed below the front section of the vehicle and is used to extend along its own axial direction and support the front section of the vehicle, and the front support leg is located in the middle of the front section of the vehicle along the vehicle width direction; or, the number of the front support legs is two, and the front section of the vehicle includes two H-beams spaced apart along the vehicle width direction, and the two front support legs and the two H-beams are connected one-to-one.

[0016] The present invention also provides an engineering machine, which comprises the engineering chassis as described above.

[0017] Through the above technical solution, the engineering chassis provided by the embodiment of the present invention has the following beneficial effects:

[0018] By redesigning the outrigger layout on the engineering chassis, the horizontal support point connection line and the longitudinal support point connection line are perpendicular, so that the telescopic assembly, the front outrigger and the rear outrigger cooperate with the frame to form a positive cross support structure in the supporting state. The front outrigger, the rear outrigger and the two telescopic outriggers are distributed in a cross-shaped manner, and only one pair of telescopic outriggers is provided, which has fewer telescopic outriggers, reduces the number of motion mechanisms, and has a simpler structure. The front outrigger, the rear outrigger and the two telescopic outriggers directly transmit the supporting force to the frame, which can eliminate the defect of torsional deformation of the body and the outriggers in the existing H-type outrigger layout, and can avoid the occurrence of structural instability. The front outrigger is fixedly installed under the frame, and there is no need to add an outrigger arm like the traditional outrigger form. The frame can be used as the outrigger arm of the front outrigger. In the existing technology, the front outrigger is separated from the body, and the front section of the body is subjected to force only in the driving state, while the front section of the body becomes structurally redundant in the working state, which increases the burden on the front outrigger. The front outrigger, rear outrigger and two telescopic outriggers are evenly distributed in a right cross, which can ensure the hoisting stability of the whole vehicle of the construction machinery and avoid the situation where the front outrigger, rear outrigger and two telescopic outriggers affect the hoisting capacity due to uneven distribution. When supporting the construction machinery on the construction site, the two telescopic outriggers can be extended in the left and right directions first, and then the front outrigger, rear outrigger and two telescopic outriggers can simultaneously support the construction chassis downward. The outrigger arms of the front outriggers are integrated with the frame, which greatly reduces the structural redundancy and structural mass, thereby directly reducing the mass of the whole machine. Under the premise of a more compact chassis layout, the supporting performance is more powerful, and the chassis mass can be effectively reduced under the same stability performance, thereby reducing the mass of the whole construction machinery and improving the performance of the crane. Only one pair of telescopic outriggers with telescopic function requires space to unfold, so that the construction machinery can adapt to small spaces without the need for a large standing space.

[0019] Other features and advantages of the present invention will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings are used to provide an understanding of the present invention and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present invention, but do not constitute a limitation of the present invention. In the accompanying drawings:

[0021] Figure 1 is a structural schematic diagram of an engineering chassis in one state at one viewing angle according to one embodiment of the present invention;

[0022] Figure 2 is a structural schematic diagram of a state of an engineering chassis in another viewing angle according to an embodiment of the present invention;

[0023] Figure 3 is a structural schematic diagram of a state of an engineering chassis in another viewing angle according to an embodiment of the present invention;

[0024] Figure 4is a structural schematic diagram of another state of an engineering chassis at a viewing angle according to an embodiment of the present invention;

[0025] Figure 5 is a structural schematic diagram of another state of an engineering chassis at another viewing angle according to an embodiment of the present invention;

[0026] Figure 6 is a structural schematic diagram of another state of an engineering chassis in another viewing angle according to an embodiment of the present invention;

[0027] Figure 7 Schematic diagram of the distribution of legs of an engineering chassis according to an embodiment of the present invention.

[0028] Description of Reference Numerals

[0029] Label Name Label Name

[0030] 100 Engineering chassis 4 telescopic legs

[0031] 1 Frame 41 Telescopic Arm

[0032] 11 Front section 42 Second outrigger cylinder

[0033] 111 H-beam 5 Rotary mounting seat

[0034] 12 Rear section 6 Carriage axle

[0035] 121 Rear mounting end face 6a First bridge

[0036] 2 Front outrigger 6b Second bridge

[0037] 21 Mounting seat 7 Swinging frame

[0038] 22 First outrigger cylinder 8 wheel

[0039] 3 Rear outriggers DETAILED DESCRIPTION

[0040] The specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0041] The engineering chassis according to the present invention will be described below with reference to the accompanying drawings.

[0042] like Figures 1 to 6As shown, in an embodiment of the present invention, the engineering chassis 100 includes a frame 1, a front leg 2, a rear leg 3 and a telescopic assembly, the front leg 2 is installed on the frame 1 and close to the head end of the frame 1; the rear leg 3 is installed at the tail end of the frame 1; the telescopic assembly is located between the front leg 2 and the rear leg 3 along the vehicle length direction of the frame 1, the telescopic assembly includes two telescopic legs 4 arranged on both sides of the frame 1 along the vehicle width direction of the frame 1, the telescopic legs 4 can be telescoped along the vehicle width direction, the fulcrum connection line of the two telescopic legs 4 is a transverse fulcrum connection line, the fulcrum connection line of the front leg 2 and the rear leg 3 is a longitudinal fulcrum connection line, the transverse fulcrum connection line and the longitudinal fulcrum connection line are perpendicular, so that the telescopic assembly, the front leg 2 and the rear leg 3 cooperate with the frame 1 in the supporting state to form a regular cross support structure.

[0043] It can be understood that the engineering chassis 100 in this embodiment is mainly used in engineering machinery such as cranes, wherein the front outrigger 2 may include a mounting seat 21 and a first outrigger cylinder 22, the first outrigger cylinder 22 being fixedly mounted on the bottom of the frame 1 through the mounting seat 21, the rear outrigger 3 may adopt an outrigger cylinder, and the telescopic outrigger 4 may include a telescopic arm 41 and a second outrigger cylinder 42 connected to the telescopic arm 41, the telescopic arm 41 being able to telescope in the left and right directions, and the second outrigger cylinder 42 being connected to the frame 1 through the telescopic arm 41. The front outrigger 2 in this embodiment is used as a fixed outrigger, which is arranged at the front end of the frame 1 and is located below the frame 1. When outrigger support is required, the front outrigger 2 only needs to be extended downward, and the rear outrigger 3 may adopt the same telescopic structure as the telescopic outrigger 4, or may adopt other structures, and is located at the rear end of the frame 1.

[0044] like Figure 7 As shown, the line connecting the center points of the first leg cylinder 22 in the front leg 2 and the center points of the leg cylinder in the rear leg 3 is a longitudinal fulcrum line extending in the front-to-back direction, the line connecting the center points of the second leg cylinders 42 in the two telescopic legs 4 is a transverse fulcrum line extending in the left-to-right direction, and the longitudinal fulcrum line is perpendicular to the transverse fulcrum line.

[0045] like Figures 1 to 3 , the front legs 2, the rear legs 3 and the two telescopic legs 4 are in a supporting state, such as Figure 3 As shown, the center lines of the two telescopic legs 4 are arranged in sequence along the front-rear direction, and the lateral telescopic direction of the telescopic legs 4 is consistent with the vehicle width direction. Figures 4 to 6 The front legs 2, the rear legs 3 and the two telescopic legs 4 are in a retracted state.

[0046] In this embodiment, the layout of the outriggers on the engineering chassis 100 is redesigned, and the horizontal support point connection line and the longitudinal support point connection line are perpendicular, so that the telescopic assembly, the front outrigger 2 and the rear outrigger 3 cooperate with the frame 1 in the supporting state to form a positive cross support structure, and the front outrigger 2, the rear outrigger 3 and the two telescopic outriggers 4 are distributed in a cross-shaped distribution, and only a pair of telescopic outriggers 4 are provided, with fewer telescopic outriggers 4, the number of motion mechanisms is reduced, and the structure is simpler. The front outrigger 2, the rear outrigger 3 and the two telescopic outriggers 4 directly transmit the supporting force to the frame 1, which can eliminate the defect of the torsional deformation of the body and the outriggers in the existing H-type outrigger layout, and can avoid the occurrence of structural instability. In addition, the front outrigger 2 is fixedly installed under the frame 1, and there is no need to add an outrigger arm like the traditional outrigger form. The frame 1 can be used as the outrigger arm of the front outrigger 2. In the prior art, the front outrigger is separated from the body, and the front section of the body is subjected to force only in the driving state, while the front section of the body becomes structurally redundant in the working state, which increases the burden on the front outrigger. The front outrigger 2, the rear outrigger 3 and the two telescopic outriggers 4 are evenly distributed in a right cross shape, which can ensure the hoisting stability of the entire construction machinery. Figure 7 As shown, the horizontal support line and the longitudinal support line are perpendicular, and the support area of ​​the engineering chassis 100 is evenly divided into four areas, so that the lifting capacity of the four areas divided by the horizontal support line and the longitudinal support line is the same, which can avoid the situation where the front legs 2, the rear legs 3 and the two telescopic legs 4 are unevenly distributed and affect the lifting capacity. When the engineering chassis in this embodiment is used to support engineering machinery, the two telescopic legs 4 can be extended in the left and right directions first, and then the front legs 2, the rear legs 3 and the two telescopic legs 4 simultaneously support the engineering chassis 100 downward. In this embodiment, the leg arm of the front leg 2 is integrated with the frame 1, which greatly reduces the structural redundancy and structural mass, thereby directly reducing the mass of the whole machine. Under the premise of a more compact chassis layout, this embodiment has a stronger supporting performance, and can effectively reduce the chassis mass under the same stability performance, thereby reducing the mass of the whole engineering machinery and improving the performance of the crane. In addition, only one pair of telescopic legs 4 with telescopic function requires a deployment space, so that the engineering machinery can adapt to a small space without a large standing space.

[0047] The cross-shaped distributed outriggers of the engineering chassis 100 in this embodiment have support performance close to that of the X-shaped outrigger layout, and can be better than the support performance of the H-shaped outrigger layout; and are more compact than the X-shaped outrigger layout, which requires sufficient space to be deployed, limiting the working space and position of the engineering machinery. The cross-shaped distributed outriggers of the engineering chassis 100 in this embodiment ensure stability without increasing the number of outriggers. The rear section of the frame 1 does not need to be extended, and the rear outriggers 3 can also meet the support requirements. The rear outriggers are one of the main outriggers and have very high support strength. The outrigger layout is more convenient than the existing X-shaped outrigger layout, and can be more flexible in deploying the outriggers in a small space without reducing the lifting performance.

[0048] In one embodiment, the two telescopic legs 4 are staggered along the vehicle length direction to minimize the width of the engineering chassis 100. The staggered arrangement of the two telescopic legs 4 can reduce the requirement for the width of the engineering chassis 100 and avoid the situation where the width of the engineering chassis 100 is wider due to the coaxial arrangement of the two telescopic legs 4, and the rear leg 3 is offset to the side of the frame relative to the center line of the frame 1. One of the telescopic legs 4 is arranged forward, and the other telescopic leg 4 is arranged backward. The lateral support line between the two telescopic legs 4 is offset by a first angle relative to the vehicle width direction. The front leg 2 can be located on the center line of the frame 1. The rear leg 3 is offset to the side of the frame 1 relative to the center line of the frame 1. The offset angle of the rear leg 3 relative to the center line of the frame can be adapted to the first angle, so that the lateral support line and the longitudinal support line are perpendicular. In this embodiment, the left and right telescopic legs 4 are not coaxially arranged along the front-to-back direction, and there is a front-to-back misalignment. In addition, the distribution of the front leg 2 and the rear leg 3 is not on the center line of the frame 1. Figure 7 As shown, the four legs are evenly distributed in a right cross shape, ensuring the stability of the vehicle's lifting load.

[0049] In another embodiment, the two telescopic legs 4 are coaxially and symmetrically arranged along the width direction of the vehicle, and the front legs 2 and the rear legs 3 are both located on the center line of the frame, so that the front legs 2, the rear legs 3 and the two telescopic legs 4 are evenly distributed in a right cross in the supporting state. The leg arrangement method of this embodiment can be applied to engineering machinery with a wider engineering chassis 100.

[0050] Specifically, the engineering chassis 100 further includes a swing frame 7, one end of which is hinged to the rear of the frame 1, and the other end is connected to the rear leg 3. The swing frame 7 can swing back and forth between a folded position and an unfolded position relative to the frame 1. The swing frame 7 in the folded position is folded on the frame 1, and the swing frame 7 in the unfolded position is unfolded relative to the frame 1, and the length direction of the swing frame 7 is consistent with the length direction of the vehicle. The rear leg 3 in this embodiment can be installed at the rear of the box-shaped structure of the frame 1 in a swinging and folding manner, such as Figure 3As shown, the swing frame 7 is in the unfolded position. The swing frame 7 in the unfolded position extends in the front-to-back direction. The rear legs 3 are located at the rear end of the swing frame 7. Figure 6 As shown, the swing frame 7 is in the folded position, and the swing frame is folded on the frame 1, and can be swung and stored. Under the premise of ensuring the length of the force arm of the rear leg 3, the length of the whole vehicle can be greatly reduced in the driving state, thereby enhancing the flexibility of the whole machine. The angle between the unfolded position and the folded position of the swing frame 7 is ninety degrees. And the hinge position of the swing frame can be adjusted according to the requirements of the turning radius of the whole vehicle to control the length of the whole vehicle. In one embodiment, the swing frame 7 can be hinged to the frame 1 through a hinge, and in other embodiments, the swing frame 7 can be hinged to the frame 1 through other hinge forms.

[0051] In the prior art, the rear outriggers are placed in the middle and act directly on the upper and lower covers of the frame. The generated reaction force cannot be directly transmitted and act on the side wall panels of the frame, which greatly weakens the strength of the frame. The frame structure needs to be improved to meet the support performance, resulting in a complex frame structure. In this embodiment, the rear outriggers 3 can be connected to one side of the box-type frame 1 by a swing hinge, and an offset hinge point is adopted. The hinge point can directly transmit the reaction force generated by the rear outriggers 3 to the wall panels of the box-type frame 1, which greatly improves the stress condition of the box-type frame 1, without completely redesigning the frame to improve the stress condition. And because it is an offset hinge point, the swing form can avoid affecting the flexibility of the whole vehicle outrigger deployment (the whole process of retracting and deploying the swing outriggers will not exceed the body width of the engineering machinery).

[0052] Specifically, the rear end of the frame 1 is provided with a rear mounting end surface 121, and the swing frame 7 is hinged to the swing point of the rear mounting end surface 121, and the swing point is arranged close to a side surface of the frame 1 in the vehicle width direction. Figure 6 As shown, the hinge point between the swing frame 7 and the rear section 12 is arranged on the left, so that when the swing frame 7 is swung to the folded position, part of the structure of the swing frame 7 overlaps with the rear section 12, thereby avoiding the situation where the swing frame 7 exceeds the rear section 12 too much in the left and right direction.

[0053] Specifically, the engineering chassis 100 also includes a plurality of load-bearing axles 6, which are installed on the frame 1 along the length direction of the vehicle. The load-bearing axles 6 are provided on both the front and rear sides of the telescopic assembly, which can make the engineering chassis 100 more stable. The engineering chassis 100 also includes a swivel mounting seat 5 installed on the frame 1 and located between the front legs 2 and the rear legs 3. The swivel mounting seat 5 is used to install a swivel support. The telescopic assembly is arranged near the swivel mounting seat 5 along the length direction of the vehicle and is located below the swivel mounting seat 5. The two telescopic legs 4 are arranged on both sides of the swivel mounting seat 5 along the left and right directions. A reinforcement structure is provided on the frame 1. The swivel mounting seat 5 and the telescopic assembly are both close to the reinforcement structure, so that the swivel mounting seat 5 and the telescopic assembly share the same reinforcement structure. The reinforcement structure can be a set of reinforcing ribs, which can simplify the structure of the frame 1 while reducing the weight of the entire vehicle.

[0054] In this embodiment, the left and right telescopic legs 4 are staggered in the front-to-back direction, and the distribution of the front legs 2 and the rear legs 3 is not on the longitudinal center line of the frame 1. The front legs 2, the rear legs 3 and the two telescopic legs 4 are evenly distributed in a right cross according to the swivel mounting seat 5 to ensure the stability of the whole vehicle. The center of gravity of the frame 1 is located near the front of the geometric center of the frame 1, and the front legs 2 are symmetrically distributed forward relative to the rear legs 3 around the swivel center of the swivel mounting seat 5. The lever arm length of the front legs 2 is lengthened so that the center of gravity of the engineering chassis 100 is balanced when the four legs have the same support reaction force, thereby improving the front lifting capacity of the engineering machinery and enabling the crane to achieve 360° lifting performance without attenuation. It can avoid the situation where the support reaction forces provided by the legs to the left and right sides of the whole vehicle are different due to different lever arm lengths when the lifting direction is to the side and rear, which greatly affects the stability of the whole vehicle.

[0055] The vehicle frame 1 in this embodiment is only used to connect the swivel mounting seat 5 and the telescopic support leg 4 thereunder. The swivel mounting seat 5 is arranged close to the rear end of the vehicle frame 1, which can shorten the length of the box-type structure on the vehicle frame 1, so that the front section of the vehicle frame 1 does not need to adopt a box-type structure with strong structural strength, which can reduce the overall weight of the vehicle frame 1. The front section of the vehicle frame 1 is lighter to use and can be connected by an H-beam 111 that is better in longitudinal force only.

[0056] The swivel mounting seat 5, the middle telescopic legs 4 and the rear legs 3 can be linked only by the box-type structure of the frame 1, thereby shortening the length of the box-type structure of the frame 1 and reducing the weight of the chassis. As the length of the boom increases, the position of the swivel mounting seat 5 becomes more and more backward. The support point positions of the four legs in the H-type leg layout in the prior art are symmetrical relative to the rotation center axis, so it is necessary to move the rear legs backward as a whole, increase the length of the box-type body, increase the weight, and be detrimental to the performance of the crane as a whole. In this embodiment, stability is guaranteed without increasing the number of legs. As the length of the boom increases, the position of the swivel mounting seat 5 becomes more and more backward. It is only necessary to adjust the span or the cross-sectional size of the telescopic legs 4, without increasing the length of the box-type structure of the frame 1, and the rear section of the frame 1 does not need to be extended, so that the rear legs 3 can meet the support requirements, and the rotation center position of the vehicle can be flexibly adjusted.

[0057] like Figure 3 As shown, after the front leg 2, the rear leg 3 and the two telescopic legs 4 are unfolded, the positions of the four legs are distributed in a radial state relative to the slewing mounting seat 5, which can achieve a supporting performance close to that of an X-shaped leg layout. The telescopic legs 4 are placed directly below the slewing support of the frame 1, and there is a large space, which makes it easy to adjust the cross-sectional size of the legs according to the performance of the entire machine.

[0058] It should be noted that the engineering chassis 100 also includes a plurality of load-bearing axles 6 mounted on the frame 1 along the vehicle length direction, and the front and rear sides of the swivel mounting seat 5 are both provided with load-bearing axles 6. Figures 1 to 6 As shown, there are five load-bearing axles 6 in this embodiment, which are the first axle 6a, the second axle 6b, the third axle, the fourth axle and the fifth axle from front to back. The load-bearing axles 6 are arranged on the front and rear sides of the slewing mounting seat 5 and the front and rear sides of the telescopic assembly, so that the load-bearing axles 6 are distributed in front and behind the slewing support. The connecting rods and load-bearing suspensions between the frame 1 and the load-bearing axles 6 can better disperse the weight of the engineering machinery, which better solves the problem of average distribution of the axle load of the whole machine compared with the existing configuration.

[0059] In one embodiment, the load-bearing axle 6 near the front end of the frame 1 among the multiple load-bearing axles 6 is the first axle 6a, the load-bearing axle 6 adjacent to the first axle 6a is the second axle 6b, and the front support leg 2 is located between the first axle 6a and the second axle 6b along the vehicle length direction. Figures 1 to 3As shown, the number of the load-bearing axles 6 in this embodiment is five, which are the first axle 6a, the second axle 6b, the third axle, the fourth axle and the fifth axle from front to back, and the left and right ends of the load-bearing axles 6 are connected with wheels 8. The front legs 2 are located between the first axle 6a and the second axle 6b along the front-to-back direction, and a rotation space is provided between the fourth axle and the fifth axle, and the telescopic assembly and the rotation mounting seat 5 are both provided in the rotation space. In other embodiments, the number of the load-bearing axles 6 can be set according to actual use requirements. The front legs 2 in this embodiment are arranged as fixed legs between the first axle 6a and the second axle 6b in the front section of the frame 1, so that the front legs 2 can be supported as far forward as possible, and the connecting rods and load-bearing suspensions between the frame 1 and the axle can better disperse the weight of the vehicle and avoid unstable center of gravity.

[0060] In another embodiment, the number of the load-bearing axles 6 is n, which are the first axle 6a, the second axle 6b, the third axle, ... the n-1th axle, and the nth axle from front to back, and the telescopic assembly and the swivel mounting seat 5 are both arranged between the n-1th axle and the nth axle. No load-bearing axle 6 is arranged between the telescopic assembly and the swivel mounting seat 5 along the front-to-back direction, which can make the telescopic assembly and the swivel mounting seat 5 closer along the front-to-back direction, thereby improving the compactness of the structure. Specifically, the positions of the telescopic assembly and the swivel mounting seat 5 relative to the axle can be set according to actual use requirements. In another embodiment, the number of the load-bearing axles 6 is n, which are the first axle 6a, the second axle 6b, the third axle, ... the n-1th axle, and the nth axle from front to back, and the telescopic assembly and the swivel mounting seat 5 are both arranged between the n-3th axle and the n-2th axle.

[0061] Specifically, the vehicle frame 1 includes a front section 11 and a rear section 12, the front legs 2 are mounted on the front section 11; the rear section 12 is connected to the front section 11, the rear section 12 is a box-shaped structure, and the rear legs 3 are mounted on the rear section 12. In one embodiment, the rear section 12 of the vehicle frame 1 is a box-shaped structure, and the swivel mounting seat 5, the two telescopic legs 4 and the rear legs 3 are connected by the box-shaped structure, so that the supporting strength of the engineering machinery can be ensured.

[0062] In another embodiment, the front section 11 of the vehicle frame 1 is configured as a central spine tube frame, the central spine tube portion is a box body of the front support leg 2, and an H-beam 111 is installed on the central spine tube frame above the front support leg 2 for installing the engine and the lower cab of the construction machinery, thereby further reducing the weight of the vehicle frame 1 and achieving a more extreme overall machine performance.

[0063] In yet another embodiment, the rear section 12 of the vehicle is a central spine tube frame, and the rear outrigger 3 adopts the same telescopic outrigger structure as the telescopic outrigger 4. The rear outrigger 3 can be telescoped in the front-to-rear direction. When extended backward, the outrigger cylinder of the rear outrigger 3 can be supported downward, thereby ensuring the supporting distance and greatly shortening the overall length of the engineering machinery.

[0064] In one embodiment, the front leg 2 is installed below the front section 11 and is used to extend along its own axis direction and support the front section 11. The front leg 2 is located in the middle of the front section 11 along the vehicle width direction. The front section 11 includes two H-shaped beams 111 spaced apart along the vehicle width direction. The front leg 2 in this embodiment can be used as a fixed leg. When support is needed, it extends downward. The first leg cylinder 22 of the front leg 2 can be installed on the center line of the two H-shaped beams 111 through the mounting seat 21, and can provide balanced support for the two H-shaped beams 111. In another embodiment, the number of the front legs 2 is two, and the front section 11 includes two H-shaped beams 111 spaced apart along the vehicle width direction. The two front legs 2 are connected to the two H-shaped beams 111 in a one-to-one correspondence. The front legs 2 in this embodiment adopt a double-leg structure and are arranged on both sides of the H-shaped beam 111 to avoid interference with the engine and the transmission system, which can facilitate the assembly of the engine and the transmission system.

[0065] The present invention also provides an engineering machine, which includes the above-mentioned engineering chassis 100. The specific structure of the engineering chassis 100 refers to the above-mentioned embodiment. Since the engineering machine adopts all the technical solutions of all the above-mentioned embodiments, it at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be described one by one here. In one embodiment, the engineering machine can be applied to lifting vehicles such as wheeled cranes.

[0066] The engineering machinery in this embodiment also includes a controller, and the front legs 2, telescopic legs 4, and rear legs 3 are all electrically connected to the controller. When support is needed, the controller can control the telescopic legs 4 under the slewing support to unfold to the left and right sides respectively, and the rear legs 3 need to be unfolded by swinging. When it is determined that the telescopic legs 4 and the rear legs 3 are fully unfolded, the oil cylinders of the front legs 2, telescopic legs 4, and rear legs 3 are controlled to support downward. The swing range of the rear legs 3 is within the width of the entire vehicle of the engineering machinery, and no additional lateral space is required to unfold the legs.

[0067] In the description of the present invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0068] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0069] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0070] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. An engineering chassis, characterized in that: The engineering chassis (100) comprises: Frame (1); A front support leg (2) mounted on the frame (1) and close to the front end of the frame (1); A rear support leg (3) mounted on the rear portion of the frame (1); A telescopic assembly is located between the front leg (2) and the rear leg (3) along the vehicle length direction of the frame (1), the telescopic assembly comprises two telescopic legs (4) arranged on both sides of the frame (1) along the vehicle width direction of the frame (1), the telescopic legs (4) can be telescoped along the vehicle width direction, the support point connection line of the two telescopic legs (4) is a transverse support point connection line, the support point connection line of the front leg (2) and the rear leg (3) is a longitudinal support point connection line, and the transverse support point connection line is perpendicular to the longitudinal support point connection line.

2. The engineering chassis according to claim 1, characterized in that: The two telescopic legs (4) are staggeredly distributed along the length direction of the vehicle, and the rear legs (3) are offset to the side of the frame (1) relative to the center line of the frame (1).

3. The engineering chassis according to claim 2, characterized in that: The engineering chassis (100) further comprises a swing frame (7), one end of which is hinged to the rear end of the vehicle frame (1), and the other end of which is connected to the rear support leg (3). The swing frame (7) can swing back and forth between a folded position and an unfolded position relative to the vehicle frame (1). When the swing frame (7) is in the folded position, it is folded relative to the vehicle frame (1). When the swing frame (7) is in the unfolded position, it is unfolded relative to the vehicle frame (1), and the length direction of the swing frame (7) is consistent with the length direction of the vehicle.

4. The engineering chassis according to claim 3, characterized in that: The rear end of the vehicle frame (1) is provided with a rear mounting end surface (121), and the swing frame (7) is hinged to a swing point of the rear mounting end surface (121), and the swing point is arranged close to a side surface of the vehicle frame (1) in the vehicle width direction.

5. The engineering chassis according to claim 1, characterized in that: The two telescopic legs (4) are coaxially and symmetrically arranged along the width direction of the vehicle, and the front leg (2) and the rear leg (3) are both located on the center line of the frame.

6. The engineering chassis according to any one of claims 1 to 5, characterized in that: The engineering chassis (100) further comprises a swivel mounting seat (5) mounted on the vehicle frame (1) and located between the front legs (2) and the rear legs (3); the swivel mounting seat (5) is used to mount a swivel bearing; the telescopic assembly is arranged close to the swivel mounting seat (5) along the vehicle length direction and is located below the swivel mounting seat (5); and the two telescopic legs (4) are arranged on both sides of the swivel mounting seat (5).

7. The engineering chassis according to claim 6, characterized in that: The engineering chassis (100) further comprises a plurality of load-bearing axles (6), wherein the plurality of load-bearing axles (6) are mounted on the frame (1) along the vehicle length direction, and the load-bearing axles (6) are arranged on both the front and rear sides of the telescopic assembly.

8. The engineering chassis according to claim 7, characterized in that: The bearing axle (6) is arranged on both the front and rear sides of the slewing mounting seat (5); and / or, Among the plurality of load-bearing axles (6), the load-bearing axle (6) close to the front end of the frame (1) is a first axle (6a), the load-bearing axle (6) adjacent to the first axle (6a) is a second axle (6b), and the front support leg (2) is located between the first axle (6a) and the second axle (6b) along the vehicle length direction.

9. The engineering chassis according to any one of claims 1 to 5, characterized in that: The vehicle frame (1) comprises: A front section (11), the front support leg (2) being mounted on the front section (11); The vehicle rear section (12) is connected to the vehicle front section (11), the vehicle rear section (12) is a box-type structure, and the rear support leg (3) is installed on the vehicle rear section (12).

10. The engineering chassis according to claim 9, characterized in that: The front support leg (2) is installed below the front section (11) and is used to extend along its own axis direction and support the front section (11). The front support leg (2) is located in the middle of the front section (11) along the width direction of the vehicle. or, The number of the front legs (2) is two, the front section (11) comprises two H-shaped beams (111) arranged at intervals along the width direction of the vehicle, and the two front legs (2) and the two H-shaped beams (111) are connected in a one-to-one correspondence.

11. An engineering machine, characterized in that: The engineering machinery comprises the engineering chassis (100) according to any one of claims 1 to 10.

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