Support device and construction machinery

Abstract

The present invention discloses a support device and a construction machinery, relating to the field of construction machinery, and is used to optimize the structure of the support device. The support device includes a mounting base, an arc-shaped leg, and a swing leg. The mounting base includes an arc-shaped box body. The arc-shaped leg is slidably nested in the arc-shaped box body so that the arc-shaped leg can be switched between a working state and a retracted state; the working state refers to the state where part of the arc-shaped leg is outside the arc-shaped box body, and the retracted state refers to the state where part of the arc-shaped leg is inside the arc-shaped box body. The swing leg is rotatably connected to the arc-shaped box body. The support device provided by the above technical solution can stably support the whole machine when the construction machinery is in the operating state, and has the characteristics of large overall stiffness, few telescopic stages, compact and simple structure, strong site adaptability, and the ability to operate unilaterally for the whole machine.

Description

Technical Field

[0001] The present invention relates to the field of engineering machinery, and in particular to a supporting device and engineering machinery. Background Art

[0002] In order to meet the needs of engineering operations, construction machinery is equipped with a support device, which is used to stably support the entire machine when the construction machinery is in operation. Taking concrete pump trucks as an example, the support devices of concrete pump trucks widely used in the market can be divided into swing outrigger support devices and X-outrigger support devices according to the structural form of the front outrigger.

[0003] The swing leg support device includes a front leg and a rear leg, both of which are swing-type structures. The front leg can be one-stage or multi-stage. Before the whole machine is operated, the swing leg is driven by the driving mechanism to rotate around the corresponding axis to the set position, and the telescopic leg is extended to the set position. In this state, the swing leg support device provides stable support for the whole machine.

[0004] The disadvantages of the swing leg support device are: since the first-level legs are swing-type, the legs will sweep across a fan-shaped area when they are unfolded, occupying a large site space and having poor site adaptability. In addition, the swing leg support device operates in a state where only one leg is unfolded and the other leg is retracted, and the support area formed is small, so the whole machine with the swing leg support device does not have the function of unilateral operation.

[0005] The X-leg support device includes front legs and rear legs. The front legs are telescopic structures, and the rear legs are swing structures. Before the whole machine is operated, the corresponding mechanism drives the front legs of each level to extend to the set position, and drives the rear legs to rotate around the corresponding axis to the set position to provide support for the whole machine.

[0006] The X-leg support device has the following shortcomings: the left and right front leg boxes are arranged in an X shape and overlap each other in height, so each front leg can only obtain a cross-sectional height equivalent to 1 / 2 of the slewing base. The national standard has strict requirements on the height of the whole machine, which makes the cross-sectional height of the front leg box relatively low, the overall rigidity of the X-leg support device is poor, and the working reliability and support stability of the whole machine are not good.

[0007] With the development of society, the market has put forward higher requirements for engineering machinery support devices. The current swing leg support device and X leg support device cannot meet the use needs. Summary of the invention

[0008] The present invention provides a supporting device and an engineering machine, which are used to optimize the structure of the supporting device.

[0009] An embodiment of the present invention provides a supporting device, comprising:

[0010] A mounting base including a curved box;

[0011] An arc-shaped leg that is slidably nested in the arc-shaped box body so that the arc-shaped leg can be switched between a working state and a retracted state; the working state refers to the state where the arc-shaped leg is partially located outside the arc-shaped box body, and the retracted state refers to the state where the arc-shaped leg is partially located inside the arc-shaped box body; and

[0012] A swing leg that is rotatably connected to the arc-shaped box body.

[0013] In some embodiments, the support device is configured to be symmetric along its own longitudinal central axis.

[0014] In some embodiments, there are two arc-shaped box bodies, and the two arc-shaped box bodies are symmetrically arranged on both sides of the longitudinal central axis of the support device; the installation heights of the two arc-shaped box bodies are the same; the two arc-shaped box bodies are fixedly connected, and one arc-shaped leg corresponds to one arc-shaped box body; there are two arc-shaped legs, and the two arc-shaped legs are symmetrically arranged on both sides of the longitudinal central axis of the support device, and the installation heights of the two arc-shaped legs are the same.

[0015] In some embodiments, the arc-shaped leg is slidably arranged inside the arc-shaped box body.

[0016] In some embodiments, the extending direction of the arc-shaped box body is consistent with the length direction of the longitudinal central axis of the support device.

[0017] In some embodiments, the heights of the arc-shaped legs located in each arc-shaped box body are the same.

[0018] In some embodiments, the radian of the arc-shaped box body is the same as the radian of the arc-shaped leg.

[0019] In some embodiments, the mounting seat further includes:

[0020] A rotary cylinder, and the two arc-shaped box bodies are fixedly connected through the rotary cylinder.

[0021] In some embodiments, the mounting seat further includes:

[0022] A U-shaped box body, and the two arc-shaped box bodies are also fixedly connected through the U-shaped box body; the rotary cylinder is spaced from the U-shaped box body.

[0023] In some embodiments, the mounting seat may further include an upper box girder and a lower box girder, and the two arc-shaped box bodies may also be fixedly connected through the upper box girder and the lower box girder spanning the left and right box bodies; the rotary cylinder is spaced from the upper box girder and the lower box girder.

[0024] In some embodiments, the support device further includes:

[0025] An outrigger assembly is fixedly connected to the arc-shaped box body, and the outrigger assembly is rotatably connected to the swing leg.

[0026] In some embodiments, the outrigger assembly includes:

[0027] A first connection seat provided with a first hinge hole; and

[0028] A second connection seat; provided with a second hinge hole, and the central axes of the first hinge hole and the second hinge hole coincide; the swing leg is hinged to the first connection seat through the first hinge hole, and the swing leg is also hinged to the second connection seat through the second hinge hole.

[0029] In some embodiments, the mounting seat further includes:

[0030] A first reinforcing member fixedly connected to the first connection seat, the second connection seat, and the arc-shaped box body.

[0031] In some embodiments, the mounting seat further includes:

[0032] A second reinforcing member, and a second reinforcing member is fixed to the end of the arc-shaped box body away from the swing leg.

[0033] In some embodiments, the mounting seat further includes:

[0034] An auxiliary box body is installed between the slewing cylinder and the upper box girder, and / or installed between the slewing cylinder and the lower box girder.

[0035] In some embodiments, the arc-shaped leg includes:

[0036] A first main body configured to be arc-shaped, and the first main body is located inside the arc-shaped box body; and

[0037] A first support leg is installed at the end of the first main body and is located outside the arc-shaped box body.

[0038] In some embodiments, the swing leg is provided with an avoidance groove to avoid the arc-shaped leg in a retracted state.

[0039] An embodiment of the present invention also provides a construction machine including the support device provided by any technical solution of the present invention.

[0040] The supporting device provided by the above technical solution includes a mounting base, an arc-shaped leg, and a swing leg. The movement form of the arc-shaped leg is extension and retraction. Among them, when the arc-shaped leg is in the extended state, the arc-shaped leg plays a supporting role. When the arc-shaped leg is in the retracted state, the arc-shaped leg retracts into the arc-shaped box body, so it does not occupy extra space. The swing leg is used in a rotatable connection form. During the operation of the whole machine, when the machine is driving, the arc-shaped leg can be retracted into the arc-shaped box body of the mounting base to ensure that the vehicle does not exceed the width limit; during operation, the arc-shaped leg extends along the arc-shaped box body to meet the span requirements. It can be seen that the supporting device provided by the above technical solution can stably support the whole machine when the construction machinery is in the operating state, and has the characteristics of large overall stiffness, few telescopic stages, compact and simple structure, strong site adaptability, and the ability to operate unilaterally on the whole machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] The drawings described herein are used to provide a further understanding of the present invention, and constitute a part of this application. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0042] Figure 1 is a schematic diagram of the supporting device provided by the embodiment of the present invention in the full support state;

[0043] Figure 2 is a schematic diagram of the supporting device provided by the embodiment of the present invention in the non-working state;

[0044] Figure 3 is a schematic diagram of the supporting device provided by the embodiment of the present invention in the single-side support state;

[0045] Figure 4 is a three-dimensional structural schematic diagram of the mounting base of the supporting device provided by the embodiment of the present invention;

[0046] Figure 5 is Figure 4 a partial schematic view of point B of Figure 1 ;

[0047] Figure 6 is Figure 4 a partial schematic view of point B of Figure 2 ;

[0048] Figure 7 is a three-dimensional structural schematic diagram of the arc-shaped leg of the supporting device provided by the embodiment of the present invention;

[0049] Figure 8 is a three-dimensional structural schematic diagram of the swing leg of the supporting device provided by the embodiment of the present invention;

[0050] Figure 9Schematic diagram of the relative positions of the arc-shaped leg and the swing leg when the support device provided by the embodiment of the present invention is in a non-working state;

[0051] Figure 10 Schematic cross-sectional structure diagram of the swing leg of the support device provided by the embodiment of the present invention;

[0052] Figure 11 Schematic three-dimensional structure diagram of the support device provided by some other embodiments of the present invention;

[0053] Figure 12 Schematic diagram of the partial bottom structure of the support device provided by some other embodiments of the present invention;

[0054] Figure 13 Schematic structure diagram of the swing leg of the support device provided by some other embodiments of the present invention;

[0055] Figure 14 Schematic cross-sectional structure diagram of the swing leg of the support device provided by another embodiment of the present invention;

[0056] Figure 15 Schematic enlarged partial view of the arc-shaped leg of the support device provided by the embodiment of the present invention. Detailed implementation manners

[0057] The following combines Figures 1 to 15 to elaborate the technical solutions provided by the present invention in more detail.

[0058] Explanation of nouns and terms involved herein.

[0059] Mounting seat: A mechanical structure used to support the slewing mechanism and connect the upper and lower vehicles.

[0060] Leg: A structural member used to support the whole machine during the operation of construction machinery.

[0061] Arc-shaped leg: A leg with an overall circular arc structure that can slide and expand along a set circular arc trajectory.

[0062] Single-side operation: Refers to the operation state in which a certain construction machinery only extends the legs on one side and retracts the legs on the other side. The so-called one side refers to one side of the central axis in the length direction of the construction machinery.

[0063] See Figure 1 , the embodiment of the present invention also provides a support device, which is configured to be symmetric along its own longitudinal central axis L. The overall structure of the support device is completely symmetric. The two arc-shaped legs 2 mentioned later do not cross in the height direction, and the height of the box cross-section is large, so that the support device obtains the characteristics of high stiffness and stable support. At the same time, the structure is relatively simple and the manufacturing difficulty is relatively low.

[0064] See Figure 1 , the support device includes a mounting base 1, an arc-shaped leg 2, and a swing leg 3. The arc-shaped leg 2 serves as the front leg, and the swing leg 3 serves as the rear leg.

[0065] The arc-shaped leg 2 and the swing leg 3 on one side of the longitudinal central axis L of the support device are both in a supporting state at the same time. This state is also called single-sided support, as shown in Figure 3 . The arc-shaped leg 2 and the swing leg 3 on both sides of the longitudinal central axis L of the support device are both in a supporting state. This state is also called full support, as shown in Figure 1 .

[0066] The specific implementation methods of each component will be introduced in detail below.

[0067] See Figures 1 to 3 , the mounting base 1 includes an arc-shaped box body 11. In practical applications, the required shape of the arc-shaped box body 11 can be formed by welding multiple plates. The mounting base 1 adopts a box-shaped structure, and the inside of the box-shaped structure is hollow. This makes the mounting base 1 light in structure and small in weight, and the mounting base 1 has enough space to accommodate the arc-shaped leg 2 that needs to be installed inside the arc-shaped box body 11.

[0068] The arc-shaped leg 2 is nested and connected to the arc-shaped box body 11. The arc-shaped leg 2 is configured to be able to slide relative to the arc-shaped box body 11 so that the arc-shaped leg 2 can switch between the working state and the retracted state. The working state means that the arc-shaped leg 2 slides outward relative to the arc-shaped box body 11 so that most of the arc-shaped leg 2 is located outside the arc-shaped box body 11. In the working state, the arc-shaped leg 2 is in an open state, and the arc-shaped leg 2 can play a role in supporting the construction machinery with this support device. The retracted state means that the arc-shaped leg 2 slides inward relative to the arc-shaped box body 11 so that most of the arc-shaped leg 2 is located inside the arc-shaped box body 11. In the retracted state, most of the arc-shaped leg 2 is inside the arc-shaped box body 11. The swing leg 3 is rotatably connected to the arc-shaped box body 11.

[0069] For the support device provided by the above technical solution, its front legs and rear legs adopt different structures. At least one of the two front legs can adopt the arc-shaped leg 2, and at least one of the two rear legs can adopt the swing leg 3. The arc-shaped leg 2 and the swing leg 3 cooperate to jointly play a role in stable support.

[0070] The specific implementation method of the arc-shaped leg 2 will be introduced below.

[0071] See Figures 1 to 3, there are two arc-shaped boxes 11, and the two arc-shaped boxes 11 are symmetrically arranged on both sides of the longitudinal central axis L of the support device, extending longitudinally, and the installation heights of the two arc-shaped boxes 11 are also the same. The two arc-shaped boxes 11 are fixedly connected to form an integral body. There are also two arc-shaped legs 2, and the two arc-shaped legs 2 are symmetrically arranged on both sides of the longitudinal central axis L of the support device. One arc-shaped leg 2 is nested and installed in each arc-shaped box 11. The installation heights of the two arc-shaped legs 2 are also the same. The working states of the two arc-shaped legs 2 are independent of each other, and they can work simultaneously or only one of them can work.

[0072] See Figures 1 to 3 , the arc-shaped leg 2 has the same radian as the arc-shaped box 11, and they are concentric. The arc-shaped leg 2 slides relative to the arc-shaped box 11 to switch between the working state and the retracted state.

[0073] See Figures 1 to 3 , the extension direction of the arc-shaped box 11 is consistent with the length direction of the longitudinal central axis of the support device.

[0074] In the above technical solution, the arc-shaped leg 2 is designed as a telescopic arc-shaped structure concentric with the arc-shaped box 11, and the length of the arc-shaped leg 2 along the longitudinal direction is relatively long. The support device adopts a first-stage telescopic arc-shaped leg, which can reach the front transverse span of a two-stage X-leg, so the number of telescopic stages is small. Moreover, the arc-shaped leg 2 is nested and installed with the arc-shaped box 11. When the arc-shaped leg 2 is in the working state, most of the arc-shaped leg 2 is located outside the mounting seat 1, and the arc-shaped leg 2 plays a supporting role. When the arc-shaped leg 2 is in the non-working state, that is, the retracted state, most of the arc-shaped leg 2 is located inside the mounting seat 1, and almost all of the arc-shaped leg 2 is located inside the mounting seat 1, so the arc-shaped leg 2 hardly occupies the external space of the support device. It can be seen that the arc-shaped leg 2 slides and expands in an arc during the unfolding process, and the arc-shaped leg 2 does not need to swing, so it occupies very little site space, has strong site adaptability, and the whole machine can operate unilaterally.

[0075] The following introduces the specific implementation method of the mounting seat 1.

[0076] See Figure 3 and Figure 4 , in some embodiments, the two arc-shaped boxes 11 are fixedly connected by a rotary cylinder 18. The rotary cylinder 18 is an integral structure, running through from the slewing bearing mounting surface to the bottom plate of the mounting seat 1. The upper part of the rotary cylinder 18 is used to install the slewing bearing; the lower part of the rotary cylinder 18 is fixedly connected to both arc-shaped boxes 11 on both sides.

[0077] Since the longitudinal length of the arc-shaped box body 11 is relatively long, a return-shaped box body 10 is also provided between the two arc-shaped box bodies 11. The rotary cylinder 18 and the return-shaped box body 10 are arranged at intervals along the longitudinal direction of the mounting base 1. With the above technical solution, the structure of the mounting base 1 is more stable and the supporting effect is more reliable.

[0078] See Figures 1 to 3 , Figure 7 , in some embodiments, a lapping thick plate is provided at the tail of the arc-shaped leg 2, and several vertical partitions are distributed inside the leg box body, and horizontal ribs are provided at appropriate positions. The cross-sectional shape of the entire arc-shaped leg 2 is designed as a rectangle. The arc-shaped leg 2 is generally relatively long, and the first-stage telescopic arc-shaped leg 2 can reach the front transverse span of the two-stage X-shaped legs.

[0079] See Figures 1 to 4 , in order to make the structure of the mounting base 1 more stable, second strengthening members 17 are provided at both positions where the two arc-shaped box bodies 11 are close to the rotary cylinder 18. On the one hand, the second strengthening member 17 makes the structure of the arc-shaped box body 11 more stable, and on the other hand, it also makes the movement of the arc-shaped leg 2 more stable and reliable during the extension and retraction movements.

[0080] The second strengthening member 17 includes a door plate 171 and a U-shaped plate 172, and these two plates play both a supporting and guiding role for the arc-shaped leg 2. The door plate 171 and the U-shaped plate 172 play both a supporting and guiding role for the arc-shaped leg 2. In order to transmit force more effectively, the U-shaped plate 172 is connected to the side plate of the arc-shaped box body 11 and the rotary cylinder 18.

[0081] See Figures 1 to 6 , in order to make it convenient for the swing leg 3 to form a hinge joint with the mounting base 1, in some embodiments, the support device further includes an outrigger assembly 4 for mounting the swing leg 3, and the outrigger assembly 4 is fixed to the arc-shaped box body 11.

[0082] Specifically, in Figures 1 to 6 the some embodiments shown, a part of the cover plate of the arc-shaped box body 11 extends outward and is welded and fixed to a plurality of plates together to form a first connection seat 41 of the outrigger assembly 4; a part of the bottom plate of the arc-shaped box body extends outward and is welded and fixed to a plurality of plates together to form a second connection seat 42 of the outrigger assembly 4. The first connection seat 41 of the outrigger assembly 4 is connected to the return-shaped box body 10 through the cover plate of the arc-shaped box body 11, and the second connection seat 42 is connected to the return-shaped box body 10 through the bottom plate of the arc-shaped box body 11, making the structure at this place integrated. The first connection seat 41 is located above the second connection seat 42. The first connection seat 41 is provided with a first hinge hole 43, and the second connection seat 42 is provided with a second hinge hole 44. The central axes of the first hinge hole 43 and the second hinge hole 44 coincide, and the same swing leg 3 is hinged to the first hinge hole 43 and the second hinge hole 44 simultaneously by a pin shaft, which makes the rotatable connection between the swing leg 3 and the outrigger assembly 4 more reliable.

[0083] To increase the structural strength and stability of the cantilever assembly 4, a first reinforcing member 16 is fixedly installed on the arc-shaped box body 11, and the first reinforcing member 16 is also fixedly connected to both the first connecting seat 41 and the second connecting seat 42. The first reinforcing member 16 is composed of one or more vertical plates. The first reinforcing member 16 plays a role in reinforcement, making the structure of the mounting seat 1 more stable.

[0084] In Figures 1 to 3 the illustrated embodiment, the support device includes two swing legs 3, and each swing leg 3 is correspondingly provided with a cantilever assembly 4. The two cantilever assemblies 4 are symmetrically arranged with respect to the longitudinal central axis L of the support device.

[0085] The arc-shaped support device provided by the above technical solution is a special thin-walled box body structure form, which has all the advantages of the swing leg support device and the X-leg support device, and has its own advantages: its overall structure is completely symmetrical, the two legs have no intersection in the height direction, and the cross-sectional height of the box body is large, so that the support device obtains the characteristics of high stiffness and stable support. The arc-shaped box body 11 is arranged along the length direction of the whole machine, the leg length is long, and the first-stage telescopic arc-shaped leg 2 can reach the front transverse span of the two-stage X-leg, so the number of telescopic stages is small. The arc-shaped box bodies 11 of the mounting seat 1 have no intersection with each other, the structure is simple, and the manufacturing difficulty is low. Before the whole machine operates, the front legs are driven by a corresponding mechanism to extend to a set position (the front legs are lapped with the door panel and the U-shaped plate of the mounting seat 1), and the rear legs are driven to rotate around a corresponding axis to a set position to provide support for the whole machine. Since the front legs are arc-shaped telescopic during the unfolding process and do not need to swing, the occupied site space is very small, the site adaptability is strong, and the whole machine can operate unilaterally.

[0086] See Figure 11 and Figure 12 below to introduce some other embodiments of the mounting seat 1.

[0087] In some embodiments, an upper box girder 101 spanning the left and right box bodies is fixed above the top surfaces of the two arc-shaped box bodies 11. A lower box girder 102 spanning the left and right box bodies is fixed below the bottom surfaces of the two arc-shaped box bodies 11. The upper box girder 101, the lower box girder 102 and the slewing cylinder 18 fixedly connect the two arc-shaped box bodies 11.

[0088] In these embodiments with the upper box girder 101 and the lower box girder 102, the upper box girder 101 and the lower box girder 102 can extend towards the slewing cylinder 18 and the door panels 171 on both sides to form auxiliary box bodies 19, and the auxiliary box bodies 19 can further improve the structural stiffness of the support device.

[0089] In order to facilitate the formation of a hinge joint between the swing support leg 3 and the mounting seat 1, in some embodiments, the support device further includes an outrigger arm assembly 4 for mounting the swing support leg 3, and the outrigger arm assembly 4 is fixed to the arc-shaped box body 11.

[0090] Specifically, in Figure 11 and Figure 12 In some embodiments as shown, a part of the upper box girder 101 extends outward to form a first connection seat 41 of the outrigger arm assembly 4. A part of the lower box girder 102 extends outward to form a second connection seat 42 of the outrigger arm assembly 4. The first connection seat 41 is located above the second connection seat 42. The first connection seat 41 is provided with a first hinge hole 43, and the second connection seat 42 is provided with a second hinge hole 44. The central axes of the first hinge hole 43 and the second hinge hole 44 coincide, and the same swing support leg 3 is hinged to the first hinge hole 43 and the second hinge hole 44 simultaneously by a pin shaft, which makes the rotatable connection between the swing support leg 3 and the outrigger arm assembly 4 more reliable.

[0091] To increase the structural strength and stability of the outrigger arm assembly 4, a first reinforcing member 16 is fixedly installed on the arc-shaped box body 11, and the first reinforcing member 16 is also fixedly connected to both the first connection seat 41 and the second connection seat 42. The first reinforcing member 16 is composed of one or more vertical plates. The first reinforcing member 16 plays a role in reinforcement, making the structure of the mounting seat 1 more stable.

[0092] Refer to Figure 7 and Figure 15 , and some possible specific structures of the arc-shaped support leg 2 will be introduced below.

[0093] In some embodiments, the arc-shaped support leg 2 includes a first main body 21 and a first support leg 22. The first main body 21 is configured to be arc-shaped, and the first support leg 22 is installed at the end of the first main body 21.

[0094] In some embodiments, the first support leg 22 includes a sleeve 221 and a telescopic oil cylinder 222. The sleeve 221 is fixedly connected to the first main body 21. The telescopic oil cylinder 222 is installed inside the sleeve 221, and the telescopic oil cylinder 222 can extend to partially protrude outside the sleeve 221 to support the first main body 21.

[0095] When the telescopic oil cylinder 222 extends in place, the height of the first support leg 22 meets the support requirements, and the first support leg 22 is in the support position. When the telescopic oil cylinder 222 retracts in place, most of the telescopic oil cylinder 222 retracts into the sleeve 221, and the first support leg 22 is in the non-working state.

[0096] In some embodiments, the first support leg 22 further includes a support plate 223, which is rotatably mounted on the end of the telescopic cylinder 222 away from the sleeve 221. The radial dimension of the support plate 223 is larger than the radial dimension of the first support leg 22, and the support using the support plate 223 is more stable.

[0097] See also Figure 15 In some embodiments, the first support leg 22 further includes a flipping device 224, which includes a clamp 225 and an abutment portion 226. The clamp 225 fixes the abutment portion 226 to the sleeve 221; the abutment portion 226 is used to abut the support plate 223 when the telescopic cylinder 222 is retracted to a position, so that the support plate 223 is reversed toward the inside of the support device.

[0098] The flip device 224 does not change the connection mode between the support plate 223 and the telescopic cylinder 222. Since the support plate 223 itself is rotatable relative to the telescopic cylinder 222. During the retraction of the telescopic cylinder 222, if a certain position of the edge of the support plate 223 is blocked by the flip device 224, the support plate 223 will rotate a certain angle relative to the telescopic cylinder 222. By setting the position of the flip device 224, that is, the flip device 224 is located outside the sleeve 221, the support plate 223 is rotated toward the inside of the support device by a certain angle, and then the edge of the support plate 223 is as far as possible within the width range defined by the sleeve 221 on both sides of the support device. The above technical solution can minimize the width of the support device during use.

[0099] In some embodiments, the abutment portion 226 is configured such that an axial dimension L1 of the abutment portion 226 located inside the support device is smaller than an axial dimension L2 of the abutment portion 226 located outside the support device.

[0100] The abutting portion 226 is specifically a structure in which one side has a small axial dimension and the other side has a large axial dimension, and the entire axial dimension is a gradual structure. The abutting portion 226 is, for example, a rubber plate.

[0101] In order to maximize the use of the whole machine space and avoid exceeding the whole machine width required by national standards, a flip device 224 is also designed at the vertical cylinder support plate. The device is composed of an abutment portion 226 (such as a rubber plate) and a plurality of pipe hoops, and the rubber plate is fixed to the support leg structure cylinder by the pipe hoops. When the vertical cylinder is retracted, the support plate is supported by the rubber plate and tilted at a certain angle to reduce the width space occupied.

[0102] In some embodiments, the curvature of the arc-shaped box body 11 is the same as the curvature of the arc-shaped legs 2. This allows the arc-shaped box body 11 to slide in and out sequentially.

[0103] See also Figures 1 to 4 , Figures 8 to 10, The following introduces the specific implementation of the swing support leg 3. The swing support leg 3 adopts a slender box structure. The swing support leg 3 is hinged to the hinge point of the outrigger assembly 4 of the mounting base 1 through a pin shaft. The working states of the two swing support legs 3 are completely independent. One of them can be in the working state, or both can be in the working state at the same time.

[0104] See Figures 1 to 4 , The swing support leg 3 includes a second main body 32 and a second support leg 33. The second main body 32 is a slender box structure. The second support leg 33 is similar in structure to the first support leg 22. The second support leg 33 also includes a sleeve and a telescopic oil cylinder. When the telescopic oil cylinder extends in place, the second support leg 33 plays a supporting role. When the telescopic oil cylinder retracts in place, the second support leg 33 no longer plays a supporting role.

[0105] See Figures 8 to 10 , In some embodiments, the swing support leg 3 is provided with an avoidance groove 31 to avoid the arc-shaped support leg 2 in the retracted state.

[0106] For large-tonnage construction machinery, in order to achieve a large front transverse span, the arc-shaped support leg 2 and the arc-shaped box body 11 of the mounting base 1 are designed to be longer. In the state where all the support legs of the whole machine are retracted, the tails of the arc-shaped support leg 2 and the arc-shaped box body 11 of the mounting base 1 will extend into the rear support leg box body. To avoid interference, the middle part of a side plate of the rear support leg is designed as an inward concave structure serving as the avoidance groove 31, and the cover plate and bottom plate at this place are locally strengthened. Several partitions are also added inside the box body at this place according to different situations.

[0107] See Figure 13 and Figure 14 , The following introduces some other implementation methods of the swing support leg.

[0108] In some embodiments, thin box bodies are provided at both the top and bottom of the swing support leg 3, as Figure 14 shown. In these embodiments, the middle part of the rear support leg is designed as the avoidance groove 31 to avoid the arc-shaped support leg 2 in the retracted state.

[0109] In the above technical solution, the inward concave depth of the swing support leg 3 is very deep, the remaining width of the main box body is very small, but there is a small box body at both the top and bottom. The rear support leg transmits force through these two small box bodies. It should be noted that the structure, size, and setting position of the avoidance groove 31 of the swing support leg 3 can be different from those of the above embodiments, and of course, some parameters can also be the same. The structure of the swing support leg 3 depends on the specific type, size, load capacity, etc. of the construction machinery.

[0110] For other content not introduced, reference can be made to the above introduction, and it will not be elaborated here.

[0111] An embodiment of the present invention further provides a construction machine, which includes the support device provided by any technical solution of the present invention. The construction machine is, for example, a crane or the like.

[0112] The construction machine provided by the above technical solution has the above support device. The support device has a large overall stiffness, few telescopic stages, a compact and simple structure, strong site adaptability, and can perform unilateral operation of the whole machine.

[0113] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation to the protection scope of the present invention.

[0114] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features, but these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A support device, characterized in that, Comprising: A mounting base (1), including an arc-shaped box body (11); the interior of the arc-shaped box body (11) is hollow; Arc-shaped legs (2), slidably nested in the arc-shaped box body (11) so that the arc-shaped legs (2) can be switched between a working state and a retracted state; the arc-shaped box body (11) has sufficient space to accommodate the arc-shaped legs (2) to be installed inside the arc-shaped box body (11); the working state means the state where the arc-shaped legs (2) are partially outside the arc-shaped box body (11), and the retracted state means the state where the arc-shaped legs (2) are partially inside the arc-shaped box body (11); And Swing legs (3), rotatably connected to the arc-shaped box body (11); Wherein, the mounting base (1) further includes: A rotary cylinder (18), and the two arc-shaped box bodies (11) are fixedly connected through the rotary cylinder (18); and A second reinforcing member (17), and a second reinforcing member (17) is fixed to the end of the arc-shaped box body (11) away from the swing legs (3); The second reinforcing member (17) includes a door plate (171) and a U-shaped plate (172), and both the door plate (171) and the U-shaped plate (172) support and guide the arc-shaped legs (2); the U-shaped plate (172) is connected to the side plate of the arc-shaped box body (11) and the rotary cylinder (18) to effectively transmit force; Wherein, the support device further includes an outrigger assembly (4), fixedly connected to the arc-shaped box body (11), and the outrigger assembly (4) is rotatably connected to the swing legs (3); The support device further includes a loop-shaped box body (10), and the two arc-shaped box bodies (11) are also fixedly connected through the loop-shaped box body (10); the rotary cylinder (18) is spaced from the loop-shaped box body (10); alternatively, the mounting base (1) further includes an upper box girder (101) and a lower box girder (102), and the two arc-shaped box bodies (11) are fixedly connected through the upper box girder (101) and the lower box girder (102) spanning the left and right box bodies; the rotary cylinder (18) is spaced from the upper box girder (101) and the lower box girder (102); The swing legs (3) are provided with avoidance grooves (31) to avoid the arc-shaped legs (2) in the retracted state.

2. The support device according to claim 1, characterized in that, The support device is configured to be symmetric along its own longitudinal central axis.

3. The support device according to claim 1, wherein There are two arc-shaped box bodies (11), and the two arc-shaped box bodies (11) are symmetrically arranged on both sides of the longitudinal central axis of the support device; the installation heights of the two arc-shaped box bodies (11) are the same; the two arc-shaped box bodies (11) are fixedly connected, and one arc-shaped leg (2) corresponds to one arc-shaped box body (11); There are two arc-shaped legs (2), and the two arc-shaped legs (2) are symmetrically arranged on both sides of the longitudinal central axis of the support device, and the installation heights of the two arc-shaped legs (2) are the same.

4. The support device according to claim 1, characterized in that, The arc-shaped legs (2) are slidably arranged inside the arc-shaped box body (11).

5. The support device according to claim 1, characterized in that, The extension direction of the arc-shaped box body (11) is consistent with the length direction of the longitudinal central axis of the support device.

6. The support device according to claim 1, characterized in that, The heights of the arc-shaped legs (2) located in each of the arc-shaped box bodies (11) are the same.

7. The support device according to claim 1, characterized in that, The radian of the arc-shaped box body (11) is the same as the radian of the arc-shaped leg (2).

8. The support device according to claim 1, characterized in that The outrigger assembly (4) includes: A first connecting seat (41) provided with a first hinge hole (43); and A second connecting seat (42) provided with a second hinge hole (44), the central axes of the first hinge hole (43) and the second hinge hole (44) coincide; the swing leg (3) is hinged to the first connecting seat (41) through the first hinge hole (43), and the swing leg (3) is also hinged to the second connecting seat (42) through the second hinge hole (44).

9. The support device according to claim 8, wherein The mounting seat (1) further includes: A first reinforcing member (16) fixedly connected to the first connecting seat (41), the second connecting seat (42), and the arc-shaped box body (11).

10. The support device according to claim 1, characterized in that, The mounting seat (1) further includes: An auxiliary box body (19) installed between the slewing cylinder (18) and the upper box girder (101), and / or installed between the slewing cylinder (18) and the lower box girder (102).

11. The support device according to claim 1, characterized in that, The arc-shaped leg (2) includes: A first main body (21) configured to be arc-shaped, and the first main body (21) is located inside the arc-shaped box body (11); and A first support leg (22) installed at the end of the first main body (21) and located outside the arc-shaped box body (11).

12. An engineering machinery, characterized in that, Comprising the support device according to any one of claims 1 to 11.

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