CN220283417U - Landing leg device and engineering machinery - Google Patents

Abstract

The utility model relates to the technical field of engineering machinery and provides a supporting leg device and engineering machinery, wherein the supporting leg device comprises a supporting leg vertical oil cylinder and a supporting leg disc assembly, the supporting leg disc assembly comprises a supporting leg disc, the supporting leg disc is provided with a groove structure, the supporting leg vertical oil cylinder comprises a piston rod, and the end part of the piston rod is embedded in the groove; the utility model not only makes the structure of the whole support leg device simpler and correspondingly reduces the processing cost of the support leg vertical oil cylinder, but also facilitates the assembly and maintenance operation of the support leg vertical oil cylinder with the support leg disc assembly after the structure is simplified.

Description

Landing leg device and engineering machinery

Technical Field

The utility model relates to the technical field of engineering machinery, in particular to a supporting leg device and engineering machinery.

Background

Engineering machinery such as cranes, concrete pump trucks and the like are provided with a supporting leg device, wherein the supporting leg device mainly comprises a supporting leg vertical oil cylinder and a supporting leg disc assembly, and the supporting leg disc assembly is usually arranged at the bottom of the supporting leg vertical oil cylinder and is used for being in contact with the ground when the engineering machinery works, so that weights on the engineering machinery and gravity generated by the engineering machinery are transmitted to the ground through the supporting leg disc assembly.

In the related art, the end part of the piston rod of the vertical supporting leg oil cylinder is provided with a ball head structure, and the end part of the piston rod and the ball head structure are of an integrated structure, but the processing cost of the vertical supporting leg oil cylinder is higher due to the fact that the shape of the ball head structure is complex.

Disclosure of Invention

The utility model solves the problem of effectively simplifying the structure of the supporting leg device so as to reduce the processing cost of the supporting leg vertical cylinder in the supporting leg device.

In order to solve the problems, the utility model provides a supporting leg device which comprises a supporting leg vertical oil cylinder and a supporting leg disc assembly, wherein the supporting leg disc assembly comprises a supporting leg disc, the supporting leg disc is provided with a groove structure, the supporting leg vertical oil cylinder comprises a piston rod, and the end part of the piston rod is embedded in the groove structure.

Optionally, the support leg plate assembly further comprises a connecting portion, the piston rod and the support leg plate are respectively connected with the connecting portion, and the connecting portion is used for installing the support leg plate on the piston rod.

Optionally, the connecting portion include the apron with set up in first spacing arch on the piston rod, the apron is equipped with first through-hole, the apron passes through first through-hole cover is located outside the piston rod, the apron is in the bellied top department of first spacing, the apron set up in the top of supporting leg dish, just the apron is connected through first fastener the supporting leg dish.

Optionally, one end of the piston rod is movably arranged in the groove structure, and the support leg disc is used for rotating relative to the piston rod so as to enable the support leg disc to be in close contact with the ground.

Optionally, the connecting portion further includes a bushing, the bushing is a waist drum structure or a spherical structure with a hollow interior and at least one open end, the bushing is detachably sleeved outside the piston rod, the outer wall of the bushing is matched with the shape of the groove structure, and the bushing is embedded in the groove structure of the support leg plate.

Optionally, the connecting portion further includes a second limiting protrusion, where the second limiting protrusion is disposed on the piston rod, and the second limiting protrusion is connected with the bushing and is used to limit the position of the bushing on the piston rod.

Optionally, an oiling space is defined between the support leg plate and the bushing, and an oiling hole communicated with the oiling space is formed in the support leg plate.

Optionally, the bushing is provided with a notch, and the bushing is deformed through the notch to realize sleeving on or separating from the piston rod.

Optionally, the connecting portion includes a second fastener, the supporting leg plate and the piston rod are respectively provided with a perforation, and the second fastener is arranged in the perforation of the supporting leg plate and the piston rod in a penetrating manner, so that the supporting leg plate is fastened on the piston rod.

Compared with the prior art, the support leg device is provided with the groove structure, wherein the end part of the piston rod is provided with the ball head structure, so that the end part of the piston rod of the support leg vertical cylinder can be directly embedded into the groove structure of the support leg disc, the connection between the piston rod and the support leg disc is realized, the parts of the support leg vertical cylinder such as the ball head structure are effectively reduced, the structure of the whole support leg device is simpler, the processing cost of the support leg vertical cylinder is correspondingly reduced, and the support leg vertical cylinder with the simplified structure is more convenient in the assembly and maintenance operation with the support leg disc assembly.

The utility model also provides engineering machinery comprising the landing leg device.

Because the engineering machinery comprises the supporting leg device, the engineering machinery at least has all technical effects of the supporting leg device, and the description is omitted here.

Drawings

FIG. 1 is a schematic diagram of a leg device in the related art;

FIG. 2 is a schematic diagram of a leg device according to an embodiment of the utility model;

FIG. 3 is a schematic view of an exploded structure of a leg device according to an embodiment of the present utility model;

FIG. 4 is a schematic cross-sectional view of a leg device according to an embodiment of the utility model;

FIG. 5 is a schematic view of a leg device according to another embodiment of the present utility model;

fig. 6 is an exploded view of a leg device according to another embodiment of the present utility model.

Reference numerals illustrate:

11' -cylinder; 121' -piston rod; 13' -bulb structure; 21' -support leg plate; 22' -cover plate; 1-a supporting leg vertical oil cylinder; 11-a cylinder; 12-a piston rod; 2-a foot plate assembly; 21-a foot plate; 211-oil filling holes; 212-perforating; 213-groove structure; 22-cover plate; 23-a first limit protrusion; 24-a first fastener; 25-bushings; 251-notch; 26-a second limit bump; 27-a second fastener.

Detailed Description

The engineering machinery such as a crane, a concrete pump truck and the like is provided with a supporting leg device, wherein the supporting leg device mainly comprises a supporting leg vertical oil cylinder and a supporting leg plate assembly, and the supporting leg plate assembly is usually arranged at the bottom of the supporting leg vertical oil cylinder and is used for being in contact with the ground when the engineering machinery works, so that weights on the engineering machinery and gravity generated by the engineering machinery are transmitted to the ground through the supporting leg plate assembly.

In the related art, the vertical cylinder for supporting leg mainly comprises a cylinder body 11 'and a piston rod 121' arranged in the cylinder body 11', wherein a ball head structure 13' is arranged at the end part of the piston rod 121 'far away from the cylinder body 11', the bottom end of the piston rod 121 'and the ball head structure 13' are integrated, the vertical cylinder for supporting leg mainly comprises a supporting leg disc 21 'and a cover plate 22', a groove structure with a spherical surface is arranged on the supporting leg disc 21', the ball head structure 13' at the end part of the piston rod 121 'is embedded in the groove structure of the supporting leg disc 21', the cover plate 22 'comprises two arc plates, the two arc plates are sleeved above the ball head structure 13', and the two arc plates are connected with the supporting leg disc 21 'through bolt fasteners, so that the supporting leg disc 21' is fastened outside the ball head structure 13 'through the two arc plates of the cover plate 22', fig. 1 (a) is a schematic diagram of the assembly structure of the vertical cylinder for supporting leg and the supporting leg disc assembly, and fig. 1 (b) is a schematic diagram of the explosion structure of the vertical cylinder for supporting leg and the supporting leg disc assembly. However, the shape of the ball structure 13 'is complex, which results in high processing cost of the ball structure 13' of the leg vertical cylinder.

In order that the above objects, features and advantages of the utility model will be readily understood, a more particular description of the utility model will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings.

It should be noted that the terms "first," "second," and the like in the description and the claims of the present utility model and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the utility model described herein may be implemented in sequences other than those illustrated or otherwise described herein.

In the description of the present utility model, it should be noted that, unless explicitly stated and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; may be a mechanical connection; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In the description of the present specification, the descriptions of the terms "embodiment," "one embodiment," and the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or embodiment is included in at least one embodiment or implementation of the present utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same examples or implementations. Furthermore, the particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or implementations.

In order to solve the above technical problems, as shown in fig. 2 and 3, an embodiment of the present utility model provides a leg device, which includes a leg vertical cylinder 1 and a leg disc assembly 2, wherein the leg disc assembly 2 includes a leg disc 21, the leg disc 21 is provided with a groove structure 213, the leg vertical cylinder 1 includes a piston rod 12, and an end portion of the piston rod 12 is embedded in the groove structure 213.

It should be noted that, the leg vertical cylinder 1 may further include a cylinder 11, where the cylinder 11 is connected to the piston rod 12 and is used to drive the piston rod 12 to move up and down; the supporting leg plate 21 may be disposed at one side of the axial direction of the piston rod 12, for example, below, the supporting leg plate 21 is provided with a groove structure 213, and the end of the piston rod 12 far away from the cylinder 11 is free from a ball head structure, i.e. the ball head structure is not added, so that the end of the piston rod 12 far away from the cylinder 11 is directly embedded into the groove structure 213 of the supporting leg plate 21, thereby realizing the connection between the piston rod 12 and the supporting leg plate 21; the supporting leg plate 21 can be arranged on the ground, and the cylinder body 11 is used for driving the piston rod 12 to drive the supporting leg plate 21 to lift so as to separate from the ground or descend so as to be abutted against the ground, so that the telescopic action of the supporting leg device is realized.

Specifically, the mounting manner of the foot plate 21 and the piston rod 12 may be such that, for example, the size of the groove structure 213 of the foot plate 21 is slightly smaller than the diameter of the end of the piston rod 12 away from the cylinder 11, so that when the groove structure 213 of the foot plate 21 is sleeved at the bottom end of the piston rod 12, the foot plate 21 will not separate from the piston rod 12, so that the foot plate 21 can move up and down along with the piston rod 12; for another example, the end, far away from the cylinder 11, of the supporting leg plate 21 and the piston rod 12 can be connected and fixed through other connecting parts, so that the supporting leg plate 21 can also move up and down along with the piston rod 12.

The recess structure 213 is provided on the supporting leg plate 21 in this embodiment, wherein the end portion of the piston rod 12 cancels the setting of the ball head structure, and the end portion of the piston rod 12 of the vertical supporting leg cylinder 1 is directly embedded in the recess structure 213 of the supporting leg plate 21, so as to realize the connection between the piston rod 12 and the supporting leg plate 21, thereby effectively reducing the components of the vertical supporting leg cylinder 1, such as the ball head structure, not only making the structure of the whole supporting leg device simpler, but also correspondingly reducing the processing cost of the vertical supporting leg cylinder 1, and the vertical supporting leg cylinder 1 after the structure is simplified is more convenient in the assembly and maintenance operation with the supporting leg plate assembly 2.

In one embodiment of the present utility model, the leg disc assembly 2 further includes a connection portion to which the piston rod 12 and the leg disc 21 are connected, respectively, for mounting the leg disc 21 on the piston rod 12.

It should be noted that, the supporting leg plate 21 is connected with the connecting portion through the piston rod 12 and the supporting leg plate 21, so that the supporting leg plate 21 can be mounted on the piston rod 12 through the connecting portion, so that the supporting leg plate 21 can not only move up and down along with the piston rod 12 with the connecting portion, but also prevent the supporting leg plate 21 from being separated from the piston rod 12. The piston rod 12 may take a conventional cylindrical configuration.

In one embodiment of the present utility model, as shown in fig. 2 and 3, the connection portion includes a cover plate 22 and a first limiting protrusion 23 disposed on the piston rod 12, the cover plate 22 is provided with a first through hole, the cover plate 22 is sleeved outside the piston rod 12 through the first through hole, the cover plate 22 is located above the first limiting protrusion 23, the cover plate 22 is disposed above the supporting leg plate 21, and the cover plate 22 is connected to the supporting leg plate 21 through a first fastener 24.

It should be noted that, by providing the first through hole on the cover plate 22, the diameter of the first through hole is matched with the diameter of the piston rod 12, so that the cover plate 22 is conveniently sleeved outside the piston rod 12 through the first through hole, in other words, the piston rod 12 is conveniently inserted into the groove structure 213 of the support leg plate 21 after passing through the first through hole of the cover plate 22, so as to realize quick connection between the piston rod 12 and the support leg plate 21. The cover plate 22 is positioned above the first limiting protrusion 23, wherein the diameter of the first through hole of the cover plate 22 is larger than or equal to the diameter of the piston rod 12 and smaller than the diameter of the first limiting protrusion 23, so that the cover plate 22 is supported from below through the first limiting protrusion 23 to prevent the cover plate 22 from being separated from the piston rod 12 after the cover plate 22 is combined with the support leg disc 21; the cover plate 22 is arranged above the supporting leg plate 21, and the cover plate 22 is connected with the supporting leg plate 21 through the first fastening piece 24, so that after the cover plate 22 is fixedly connected with the supporting leg plate 21 through the first fastening piece 24, the cover plate 22 is arranged above the first limiting protrusion 23, so that the cover plate 22 and the supporting leg plate 21 are prevented from being separated from the piston rod 12 through the first limiting protrusion 23, and further, the supporting leg plate assembly 2 is stably installed on the piston rod 12, and the supporting leg plate assembly 2 is ensured not to be separated from the piston rod 12.

Specifically, the first limiting protrusion 23 may be an annular protrusion disposed on an outer wall of the piston rod 12, and the annular protrusion may be a closed loop annular protrusion; the device also can be a plurality of bulges which are annularly arranged and form a non-closed loop annular bulge; whether the first limiting protrusion 23 is a closed-loop annular protrusion or a non-closed-loop annular protrusion, the central axis of the first limiting protrusion 23 coincides with the central axis of the piston rod 12, so that after the cover plate 22 is connected with the supporting leg plate 21 through the first fastening piece 24, the cover plate 22 and the supporting leg plate 21 coincide with the central axis of the piston rod 12, and the supporting leg plate assembly 2 has better vertical supporting force on the piston rod 12.

In addition, the first fastener 24 may be a bolt fastener, and other connection means such as a snap-fit structure may be used. For example, when the first fastening member 24 is a bolt fastening member, the first fastening member 24 includes a plurality of bolt fastening members, a plurality of screw holes are formed in the cover plate 22 and the leg disc 21 in an annular arrangement, after the piston rod 12 is installed in the groove structure 213 of the leg disc 21, the cover plate 22 is connected to the leg disc 21, and at this time, the plurality of bolt fastening members may sequentially penetrate through the screw holes of the cover plate 22 and the leg disc 21, and since the cover plate 22 is located above the first limiting protrusion 23 disposed outside the piston rod 12, after the cover plate 22 and the leg disc 21 are connected and fixed, the leg disc assembly 2 can be installed on the piston rod 12, so as to abut against the cover plate 22 from below through the first limiting protrusion 23 on the piston rod 12, thereby preventing the leg disc assembly 2 from being separated from the piston rod 12, as shown in fig. 2 and 3.

As another example, when the first fastener 24 employs a snap structure, the number of snap structures may be more than two, such as a plurality of snap structures spaced apart; for example, the fastening structure includes a pin member and a box member, when the pin member is disposed on the supporting foot plate 21, the box member is disposed on the cover plate 22 and corresponds to the position of the pin member, and is fastened with the box member by the pin member, so as to fasten the supporting foot plate 21 with the cover plate 22, and separated from the box member by the pin member, so as to separate the supporting foot plate 21 from the cover plate 22, so as to facilitate the removal of the supporting foot plate 21 from the piston rod 12.

In one embodiment of the present utility model, one end of the piston rod 12 is movably disposed in the groove structure 213, and the supporting leg plate 21 is configured to rotate relative to the piston rod 12, so that the supporting leg plate 21 is in close contact with the ground.

It should be noted that, when the leg device is applied in a severe construction environment such as uneven ground or soft ground, one end of the piston rod 12 is movably disposed in the groove structure 213 of the leg disc 21, so that the leg disc 21 can rotate relative to the piston rod 12, and the inclination angle of the leg disc 21 relative to the piston rod 12 is changed, so that the leg disc 21 is in close contact with the ground, and the leg disc 21 can be suitable for different severe construction environments.

Specifically, when the ground is flat, the piston rod 12 forms an included angle of 90 degrees with the bottom of the supporting leg plate 21; when the ground is uneven, the foot plate 21 has a certain movement such as a rotation angle with respect to the piston rod 12 in order to adapt to the uneven ground, so that the bottom of the foot plate 21 is in full contact with the ground, and the included angle of the piston rod 12 of the foot plate 21 is not 90 degrees.

In an embodiment of the present utility model, as shown in fig. 3 and fig. 4, the connecting portion further includes a bushing 25, the bushing 25 is a waist drum structure or a spherical structure with at least one end open, the bushing 25 is detachably sleeved outside the piston rod 12, an outer wall of the bushing 25 matches with the shape of the groove structure 213, and the bushing 25 is embedded in the groove structure 213 of the supporting leg plate 21.

It should be noted that, through limiting the bush 25 to the waist drum structure or the spherical structure with the inside cavity and one end open-ended, thereby be convenient for the piston rod 12 penetrate in the cavity of bush 25 from the opening part of bush 25, in other words, bush 25 is flexible or elastic material, detachably cover is located outside the piston rod 12, compared with the tip of the piston rod in the prior art set up the bulb structure and lead to the processing cost of landing leg perpendicular hydro-cylinder 1 too high integrally, in this embodiment in the tip of piston rod cover with detachable mode and establish the installation bush 25, not only be convenient for the supporting leg dish 21 through the rotation of bush 25 relative to the tip of piston rod more smooth, in order to be applicable to uneven ground, correspondingly still reduce the tip of piston rod to the rotation wearing and tearing in the recess structure 213 of supporting leg dish 21, in order to prolong the life of supporting leg dish subassembly 2, moreover detachably install the bush 25 is convenient for later maintenance work. And through the outer wall of bush 25 with the shape phase-match of groove structure 213, when bush 25 inlays to be installed in the groove structure 213 of stabilizer blade dish 21, the supporting shoe dish 21 can carry out certain scope rotation relative piston rod 12 and bush 25 to change the contained angle of supporting shoe dish 21 relative piston rod 12, make supporting shoe dish 21 and ground in close contact, so that stabilizer blade dish subassembly 2 is applicable to abominable ground operation environment. Fig. 3 is a schematic diagram of an exploded structure of each component of the leg vertical cylinder 1 and the leg plate assembly 2, and fig. 4 is a schematic diagram of a vertical cross-section structure of each component of the leg vertical cylinder 1 and the leg plate assembly 2 after assembly, wherein the vertical direction refers to a lifting direction of the piston rod 12.

Specifically, the bushing 25 may adopt different kinds of bushings with arc-shaped circumferential outer walls, such as a waist drum structure or a spherical structure, so that the supporting leg plate 21 can rotate more smoothly relative to the bushing 25 sleeved at the bottom end of the piston rod 12, and the supporting leg plate 21 can be quickly applied to uneven ground. The peripheral outer wall of the waist drum structure is of an arc-shaped structure, and the spherical structure can be used for spherical structures with different shapes such as round balls, oval balls, rugby balls and the like. The lining 25 can be made of plastic material with better wear resistance, for example, the lining 25 can be made of nylon lining, so that the lining has the advantages of wear resistance, strong shock resistance and corrosion resistance, light weight and convenient installation.

In one embodiment of the present utility model, as shown in fig. 3, the connection portion further includes a second limiting protrusion 26, where the second limiting protrusion 26 is disposed on the piston rod 12, and the second limiting protrusion 26 is connected to the bushing 25, so as to limit a position of the bushing 25 on the piston rod 12.

It should be noted that, the second limiting protrusion 26 is disposed on the piston rod 12, where the central axis of the second limiting protrusion 26 may coincide with the central axis of the piston rod 12, so that when the bushing 25 is sleeved outside the piston rod 12, the bushing 25 is connected with the second limiting protrusion 26, so as to limit the position of the bushing 25 on the piston rod 12 by the second limiting protrusion 26, thereby preventing the bushing 25 from displacing or shifting relative to the piston rod 12, so that the bushing 25 is fixedly mounted outside the piston rod 12, when the supporting leg disc 21 rotates relative to the bushing 25 sleeved outside the piston rod 12, the bushing 25 and the piston rod 12 do not generate relative movement, so that the service life of the bushing 25 is correspondingly prolonged, and the piston rod 12 can be ensured to be stably supported on the ground by the supporting leg disc assembly 2.

Specifically, the second limiting protrusion 26 may be an annular protrusion of the entire closed loop, or may be a non-closed loop, for example, the non-closed loop may include a plurality of protrusions arranged on the piston rod 12 in an annular space.

The bushing 25 and the second limiting protrusion 26 can be connected in the following two ways; first, when the bushing 25 is sleeved outside the piston rod 12, the second limiting protrusion 26 may be located below the bushing 25, and the second limiting protrusion 26 contacts with the bottom end of the bushing 25, so that the second limiting protrusion 26 supports and limits the bushing 25 from below, so as to prevent the bushing 25 from being separated from the piston rod 12 downward, as shown in fig. 3.

Preferably, the second limiting protrusion 26 is located below the bushing 25, the first limiting protrusion 23 is located above the bushing 25, at this time, the distance between the second limiting protrusion 26 and the first limiting protrusion 23 may be matched with the height of the bushing 25 in the axial direction of the piston rod 12, so that when the bushing 25 is sleeved outside the piston rod 12, the first limiting protrusion 23 and the second limiting protrusion 26 are respectively contacted with the top end and the bottom end of the bushing 25, at this time, the first limiting protrusion 23 may prevent the bushing 25 from moving upwards relative to the piston rod 12 to play an upper limiting role on the bushing 25, and the second limiting protrusion 26 may prevent the bushing 25 from moving downwards relative to the piston rod 12 to play a lower limiting role on the bushing 25.

Second, the inner wall of the bushing 25 is provided with a clamping groove, when the bushing 25 is sleeved outside the piston rod 12, the second limiting protrusion 26 is located at the clamping groove of the bushing 25, so that the second limiting protrusion 26 can limit the upper and lower positions of the bushing 25 on the piston rod 12 from the inner side.

In one embodiment of the present utility model, as shown in fig. 3, an oil filling space is defined between the supporting leg plate 21 and the bushing 25, and the supporting leg plate 21 is provided with an oil filling hole 211 communicating with the oil filling space.

It should be noted that, when the bushing 25 is embedded in the groove structure 213 of the supporting leg plate 21, a certain gap exists between the supporting leg plate 21 and the bushing 25, the gap is an oil filling space, the oil filling hole 211 is formed in the circumferential position of the supporting leg plate 21, and the oil filling hole 211 is communicated with the oil filling space, so that a worker can conveniently add lubricating oil to the oil filling space between the supporting leg plate 21 and the bushing 25 through the oil filling hole 211, the bushing 25 sleeved on the outer side of the piston rod 12 relatively of the supporting leg plate 21 rotates more smoothly, and the service life of the whole supporting leg device can be correspondingly prolonged.

In addition, the leg device may further include a stopper embedded in the oil injection hole 211, so that not only external dust can be prevented from being injected into the oil injection space between the leg plate 21 and the bushing 25 from the oil injection hole 211, but also lubricating oil between the leg plate 21 and the bushing 25 can be prevented from leaking out of the oil injection hole 211.

In one embodiment of the present utility model, as shown in connection with fig. 3, the bushing 25 is provided with a notch 251, and the bushing 25 is deformed by the notch 251 to achieve a fit over the piston rod 12 or a release from the piston rod 12.

It should be noted that, since the second limiting protrusion 26 is disposed on the piston rod 12, the notch 251 is formed on the bushing 25, so that the bushing 25 has a certain deformation expansion or contraction capability, and the second limiting protrusion 26 is prevented from interfering with the assembly operation of sleeving the bushing 25 on the piston rod 12 from bottom to top, so that the bushing 25 can be expanded through the notch 251 to enlarge the opening and sleeve the opening on the piston rod 12, or can be smoothly removed from the piston rod 12.

Unlike the above-described embodiments, in one embodiment of the present utility model, the foothold 21 is detachably and fixedly disposed at the bottom end of the piston rod 12, and as shown in fig. 5 and 6, the connecting portion includes a second fastening member 27, and the foothold 21 and the piston rod 12 are respectively provided with a through hole 212, and the second fastening member 27 is disposed through the foothold 21 and the through hole 212 of the piston rod 12 to fasten the foothold 21 to the piston rod 12.

It should be noted that, when the end, such as the bottom end, of the piston rod 12 far from the cylinder 11 is embedded in the groove structure 213 of the support leg disc 21, the support leg disc 21 and the piston rod 12 are penetrated by the second fastening member 27 to connect the support leg disc 21 and the piston rod 12, so that the support leg disc 21 is fastened to the piston rod 12, and the support leg disc 21 is effectively prevented from being separated from the piston rod 12, so as to ensure that the support leg disc 21 can move up and down synchronously with the piston rod 12.

Specifically, the second fastening member 27 may have a bolt-nut structure, for example, the second fastening member 27 includes a bolt member and a nut member, for example, the bolt member is disposed through the leg plate 21 and the through hole 212 of the piston rod 12, and is sleeved on one end of the bolt member by the nut member, so that the bolt member is prevented from being separated from the leg plate 21 and the piston rod 12; fig. 5 is a schematic structural view of the mounting and fixing of the foot plate 21 to the piston rod 12 by the second fastening member 27, and fig. 6 is a schematic explosive structural view of the foot plate 21, the second fastening member 27 and the piston rod 12. Of course, other types of fasteners may be used for the second fastener 27, and this is not intended to be limiting.

In addition, the shape of the groove structure of the supporting leg plate 21 is matched with the shape of the piston rod 12, for example, the groove structure of the supporting leg plate 21 is a cylindrical structure, the end part of the piston rod 12 is a cylindrical structure, and the diameter of the end part of the piston rod 12 is smaller than that of the groove structure of the supporting leg plate 21, so that the end part of the piston rod 12 is smoothly installed in the groove structure of the supporting leg plate 21.

The supporting leg plate 21 can adopt a steel sleeve to improve the mechanical rigidity and strength of the supporting leg plate 21, and after one end of the piston rod 12 far away from the piston rod 12 is sleeved in the steel sleeve, the piston rod is fixed through the second fastener 27, so that the structure of the supporting leg device is further simplified, the processing cost of the piston rod 12 is reduced, and convenience is provided for the assembly and maintenance operation of the piston rod 12 and the supporting leg plate 21.

Another embodiment of the present utility model provides a construction machine, including the leg device according to the above embodiment.

It should be noted that, the engineering machine further includes a vehicle body, and the leg device is disposed below the vehicle body and is connected with the vehicle body, so that when the piston rod 12 of the leg device drives the leg plate 21 to be supported on the ground, the vehicle body can be effectively supported. The construction machine may be a working machine such as a crane, a concrete pump truck, etc. having the leg device of the above embodiment, and is not particularly limited herein; the engineering machinery has all technical effects of the supporting leg device, and the description is omitted here.

Although the utility model is disclosed above, the scope of the utility model is not limited thereto. Various changes and modifications may be made by one skilled in the art without departing from the spirit and scope of the utility model, and these changes and modifications will fall within the scope of the utility model.

Claims (10)

1. The utility model provides a landing leg device, its characterized in that includes landing leg perpendicular hydro-cylinder (1) and stabilizer blade dish subassembly (2), stabilizer blade dish subassembly (2) are including supporting leg dish (21), stabilizer blade dish (21) are equipped with groove structure (213), landing leg perpendicular hydro-cylinder (1) include piston rod (12), the tip of piston rod (12) is inlayed and is located in groove structure (213).

2. The leg arrangement according to claim 1, characterized in that the foot disc assembly (2) further comprises a connection portion, to which the piston rod (12) and the foot disc (21) are connected, respectively, for mounting the foot disc (21) on the piston rod (12).

3. The leg device according to claim 2, characterized in that the connection part comprises a cover plate (22) and a first limit protrusion (23) arranged on the piston rod (12), the cover plate (22) is provided with a first through hole, the cover plate (22) is sleeved outside the piston rod (12) through the first through hole, the cover plate (22) is positioned above the first limit protrusion (23), the cover plate (22) is arranged above the support leg disc (21), and the cover plate (22) is connected with the support leg disc (21) through a first fastener (24).

4. A leg arrangement according to claim 2 or 3, characterized in that one end of the piston rod (12) is movably arranged in the groove structure (213), and the foot disc (21) is arranged to rotate relative to the piston rod (12) for bringing the foot disc (21) into close contact with the ground.

5. The leg device according to claim 4, wherein the connecting portion further comprises a bushing (25), the bushing (25) is a waist drum structure or a spherical structure with at least one end open, the bushing (25) is detachably sleeved outside the piston rod (12), the outer wall of the bushing (25) is matched with the shape of the groove structure (213), and the bushing (25) is embedded in the groove structure (213) of the support leg plate (21).

6. The leg arrangement according to claim 5, characterized in that the connection further comprises a second limit projection (26), which second limit projection (26) is arranged on the piston rod (12), which second limit projection (26) is connected with the bushing (25) for limiting the position of the bushing (25) on the piston rod (12).

7. The leg device according to claim 5, characterized in that an oil filling space is defined between the leg disc (21) and the bushing (25), and an oil filling hole (211) communicating with the oil filling space is provided in the leg disc (21).

8. The leg arrangement according to claim 5, characterized in that the bushing (25) is provided with a notch (251), the bushing (25) being deformed by the notch (251) to achieve a fitting over the piston rod (12) or a removal from the piston rod (12).

9. The leg arrangement according to claim 2, characterized in that the connection comprises a second fastening member (27), wherein perforations (212) are provided in the foot plate (21) and the piston rod (12), respectively, and wherein the second fastening member (27) is arranged through the perforations (212) in the foot plate (21) and the piston rod (12) for fastening the foot plate (21) to the piston rod (12).

10. A construction machine comprising a leg arrangement according to any one of claims 1 to 9.