CN216711530U - Supporting leg - Google Patents

Abstract

The utility model discloses a support leg, comprising: a leg arm; the supporting leg arm barrel is sleeved on the supporting leg arm, the supporting leg arm can move relative to the supporting leg arm barrel, and a first mounting through hole is formed in the side wall of the supporting leg arm barrel; and the antifriction assembly comprises a wear-resistant part and a mounting part, at least part of the wear-resistant part is arranged in the first mounting through hole, the wear-resistant part is used for contacting with the supporting leg arm so as to enable the outer side wall of the supporting leg arm to be separated from the inner side wall of the supporting leg arm cylinder, and the mounting part is connected on the outer side wall of the supporting leg arm cylinder and covers the wear-resistant part. The supporting leg can more conveniently solve the problem of friction force between the supporting leg arm and the supporting leg wall cylinder.

Description

Supporting leg

Technical Field

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

Background

In the high altitude construction car application scene, all need expand the landing leg under a lot of operating modes, make the stability of whole car improve, the motion of landing leg drives the landing leg arm through the hydro-cylinder and moves in a landing leg arm section of thick bamboo, in order to guarantee the stationarity of high altitude construction car, the clearance between landing leg arm and the landing leg arm section of thick bamboo is very little usually, thereby lead to having very big friction when the landing leg arm moves in a landing leg arm section of thick bamboo between the two, in order to solve the problem that has very big friction between landing leg and the landing leg arm section of thick bamboo, traditional landing leg often is the metal that the welding material is softer in a landing leg arm section of thick bamboo inboard, this kind although can solve the problem of frictional force, but because welding and processing are more complicated, consequently, cause very big puzzlement to the production debugging.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to solving at least one of the problems of the prior art. Therefore, the utility model provides the support leg, which can more conveniently solve the problem of friction between the support leg arm and the support leg wall cylinder.

A leg according to some embodiments of the utility model, comprising: a leg arm; the supporting leg arm barrel is sleeved on the supporting leg arm, the supporting leg arm can move relative to the supporting leg arm barrel, and a first mounting through hole is formed in the side wall of the supporting leg arm barrel; and the antifriction assembly comprises a wear-resistant part and a mounting part, at least part of the wear-resistant part is arranged in the first mounting through hole, the wear-resistant part is used for contacting with the supporting leg arm so as to enable the outer side wall of the supporting leg arm to be separated from the inner side wall of the supporting leg arm cylinder, and the mounting part is connected on the outer side wall of the supporting leg arm cylinder and covers the wear-resistant part.

The support leg provided by the embodiment of the utility model at least has the following technical effects:

when the high-altitude construction car began the operation, need expand foretell landing leg, usable hydro-cylinder drive landing leg arm motion this moment, because landing leg arm section of thick bamboo cover is established on the landing leg arm, and the landing leg arm is movable for a landing leg arm section of thick bamboo, when the landing leg expandes, the landing leg arm moves towards a landing leg arm section of thick bamboo, the outer wall of landing leg arm and the inner wall of a landing leg arm section of thick bamboo this moment then can produce frictional force to the scraping phenomenon appears. Similarly, when the aerial work platform finishes the operation, the supporting legs need to be retracted, the supporting leg arms can be driven by the oil cylinders to move to retract, the supporting leg arms are sleeved on the supporting leg arms, the supporting leg arms can move relative to the supporting leg arm cylinders, when the supporting legs retract, the supporting leg arms move back to the supporting leg arm cylinders, friction force can be generated between the outer walls of the supporting leg arms and the inner walls of the supporting leg arm cylinders, and accordingly scraping phenomenon can occur.

In foretell landing leg, because first installation through-hole has been seted up on the lateral wall of a landing leg arm section of thick bamboo, at least some settings of the wearing parts of antifriction subassembly are in first installation through-hole, thereby the wearing parts can be installed in first installation through-hole through the outside of a landing leg arm section of thick bamboo, further with the lateral wall contact of landing leg arm, reach this and utilize the wearing parts to make the lateral wall of landing leg arm and the inside wall looks spaced purpose of a landing leg arm section of thick bamboo, thereby the purpose of installation antifriction subassembly from the outside of a landing leg arm section of thick bamboo has been realized, processing is comparatively simple, it is comparatively convenient to install simultaneously. In addition, the installation part of the antifriction component is connected to the outer side wall of the supporting leg arm barrel, and the installation part can cover the abrasion-resistant part in a sealing mode, so that the abrasion-resistant part can be prevented from falling off from the outer side wall of the supporting leg arm barrel, the stability of the abrasion-resistant part during the movement of the supporting leg is achieved, and meanwhile the stability of the overhead working truck during the operation is guaranteed. Therefore, the installation part which is connected to the outer side wall of the supporting leg arm and used for sealing the wear-resistant part is arranged in the first installation through hole through the outer side of the supporting leg arm cylinder and used for being in contact with the outer side wall of the supporting leg arm, the problem of friction force between the supporting leg arm cylinder and the supporting leg arm during movement of the supporting leg can be solved, and the purposes of simple processing and convenient installation of the anti-friction component can be achieved.

According to some embodiments of the utility model, one side of the mounting member is provided with a connecting portion, the wear-resistant member is provided with a second mounting through hole, and the connecting portion is arranged in the second mounting through hole in a penetrating manner.

According to some embodiments of the utility model, the wear member is provided with a friction surface for contacting an outer side wall of the leg arm.

According to some embodiments of the utility model, at least one thickening is provided between the wear part and the mounting part.

According to some embodiments of the utility model, the mounting member is removably fixedly connected to the leg arm cylinder.

According to some embodiments of the utility model, a mounting plate is fixedly connected to the outer side wall of the leg arm cylinder, and the mounting member is detachably and fixedly connected to the mounting plate.

According to some embodiments of the utility model, the mounting plate is provided with a third mounting through hole aligned with the first mounting through hole, at least part of the wear member is disposed in both the third mounting through hole and the first mounting through hole, and the axial length of the wear member is greater than the width of the gap between the inner side wall of the leg arm cylinder and the outer side wall of the leg arm.

According to some embodiments of the utility model, there are multiple sets of the first mounting through holes, the multiple sets of the first mounting through holes are arranged at intervals along the circumferential direction of the leg arm cylinder, and each set of the first mounting through holes comprises two first mounting through holes arranged at intervals along the axial direction of the leg arm cylinder;

the anti-friction assemblies are arranged at intervals along the circumferential direction of the supporting leg arm cylinder, and each anti-friction assembly comprises two anti-friction assemblies which are arranged at intervals along the axial direction of the supporting leg arm cylinder;

the wear-resistant pieces of all the anti-friction assemblies are arranged in all the first mounting through holes in a one-to-one correspondence manner.

According to some embodiments of the utility model, the leg arm cylinder and the leg arm are each a quadrangular prism;

the anti-friction components are arranged in four groups, and the four groups of anti-friction components are respectively arranged on one ends, close to the supporting leg arms, of the four outer side walls of the supporting leg arm cylinder.

According to some embodiments of the utility model, the wear resistant member is a slider block made of ultra high molecular weight polyethylene.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a schematic structural view of a leg according to an embodiment of the present invention;

FIG. 2 is a schematic structural view of a leg arm cylinder and mounting plate of an embodiment of the present invention;

figure 3 is a schematic diagram of an exploded view of an anti-friction assembly in accordance with one embodiment of the present invention.

Reference numerals:

100. a leg arm;

200. a leg arm cylinder; 210. a first mounting through hole;

300. an anti-friction component; 310. a mounting member; 311. a connecting portion; 320. a wear part; 321. a second mounting through hole; 322. a friction surface; 330. a thickening member;

400. mounting a plate; 410. and a third mounting through hole.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", and the like, indicate orientations and positional relationships based on the orientations and positional relationships shown in the drawings, and are used merely for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. Furthermore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in fig. 1 and 2, an embodiment of the leg includes a leg arm 100, a leg arm cylinder 200, and an anti-friction assembly 300.

Specifically, the leg arm cylinder 200 is sleeved on the leg arm 100, the leg arm 100 moves relative to the leg arm cylinder 200, and a first mounting through hole 210 is formed in a side wall of the leg arm cylinder 200.

Further, the anti-friction assembly 300 includes a wear member 320 and a mounting member 310, at least a portion of the wear member 320 is disposed in the first mounting through hole 210, the wear member 320 is configured to contact the leg arm 100 such that an outer sidewall of the leg arm 100 is spaced apart from an inner sidewall of the leg arm barrel 200, and the mounting member 310 is connected to the outer sidewall of the leg arm barrel 200 and covers the wear member 320.

When the overhead working truck starts to work, the supporting legs need to be unfolded, the oil cylinder can be used for driving the supporting leg arm 100 to move, the supporting leg arm cylinder 200 is sleeved on the supporting leg arm 100, the supporting leg arm 100 can move relative to the supporting leg arm cylinder 200, when the supporting legs are unfolded, the supporting leg arm 100 moves towards the supporting leg arm cylinder 200, and friction force can be generated between the outer wall of the supporting leg arm 100 and the inner wall of the supporting leg arm cylinder 200 at the moment, so that the scraping phenomenon can occur. Similarly, when the aerial work platform finishes the operation, the supporting legs need to be retracted, the oil cylinder can be used for driving the supporting leg arm 100 to move to retract, the supporting leg arm cylinder 200 is sleeved on the supporting leg arm 100, the supporting leg arm 100 can move relative to the supporting leg arm cylinder 200, when the supporting legs are retracted, the supporting leg arm 100 moves back to the supporting leg arm cylinder 200, and at the moment, friction force can be generated between the outer wall of the supporting leg arm 100 and the inner wall of the supporting leg arm cylinder 200, so that the scraping phenomenon occurs.

In the above-mentioned landing leg, because the first installation through hole 210 has been seted up on the lateral wall of landing leg arm section of thick bamboo 200, at least a part of wear-resisting piece 320 of antifriction subassembly 300 sets up in first installation through hole 210, thereby wear-resisting piece 320 can be installed in first installation through hole 210 through the outside of landing leg arm section of thick bamboo 200, further with the lateral wall contact of landing leg arm 100, thereby reach and utilize wear-resisting piece 320 to make the lateral wall of landing leg arm 100 and the looks spaced purpose of the inside wall of landing leg arm section of thick bamboo 200, thereby realized the purpose of installing antifriction subassembly 300 from the outside of landing leg arm section of thick bamboo 200, the processing is comparatively simple, and it is comparatively convenient to install simultaneously. In addition, the mounting part 310 of the anti-friction assembly 300 is connected to the outer side wall of the leg arm cylinder 200, and the mounting part 310 can cover the wear-resistant part 320, so that the wear-resistant part 320 can be prevented from falling off from the outer side wall of the leg arm cylinder 200, the stability of the wear-resistant part 320 during leg movement is realized, and the stability of the overhead working truck during operation is ensured. Therefore, the mounting member 310 connected to the outer side wall of the leg arm 100 and covering the wear-resistant member 320, and the wear-resistant member 320 mounted in the first mounting through hole 210 through the outer side of the leg arm cylinder 200 and contacting the outer side wall of the leg arm 100, not only can solve the problem of friction force between the leg arm cylinder 200 and the leg arm 100 during leg movement, but also can achieve the purposes of simple processing and convenient installation of the anti-friction assembly 300.

As shown in fig. 3, a connecting portion 311 is disposed on one side of the mounting member 310, a second mounting through hole 321 is disposed on the wear-resistant member 320, and the connecting portion 311 is disposed in the second mounting through hole 321. The wear-resistant member 320 can be mounted to the connecting portion 311 through the second mounting through hole 321 and thus to the mounting member 310, so as to mount the wear-resistant member 320 to the leg through the mounting member 310, thereby ensuring that the wear-resistant member 320 has good stability during the movement of the leg.

Specifically, the connection portion 311 is a cylinder having a cross-sectional diameter smaller than the aperture of the second mounting through-hole 321.

As shown in fig. 3, the wear member 320 is provided with a friction surface 322, and the friction surface 322 is used for contacting with the outer side wall of the leg arm 100.

When the leg moves, the friction surface 322 of the wear-resistant member 320 can contact with the outer sidewall of the leg arm 100, so that the outer sidewall of the leg arm 100 can directly contact with the wear-resistant member 320 when the leg moves, and the phenomenon of scraping paint on the surface of the outer sidewall of the leg arm 100 caused by rigid friction when the leg moves is avoided.

As shown in fig. 3, at least one thickening 330 is provided between the wear member 320 and the mounting member 310.

The thickening member 330 arranged between the wear-resistant member 320 and the mounting member 310 is used for adjusting the width of the gap between the wear-resistant member 320 and the outer side wall of the leg arm 100, so that the problem that the stability of the leg movement is poor due to the fact that the width of the gap between the wear-resistant member 320 and the outer side wall of the leg arm 100 is too wide can be prevented, and the phenomenon that the aerial work platform provided with the leg shakes seriously is avoided.

Specifically, the number of thickened parts 330 is determined by the gap span between the wear-resistant part 320 and the outer side wall of the leg arm 100, and when the gap between the wear-resistant part 320 and the outer side wall of the leg arm 100 is wide, the number of thickened parts 330 can be increased.

More specifically, the thickened part 330 is provided with a through hole, and the thickened part 330 is sleeved on the connecting part 311 through the through hole on the thickened part 330 and is located between the wear-resistant part 320 and the mounting part 310.

Optionally, thickening 330 is a shim.

As shown in fig. 1, the mounting member 310 is removably fixedly connected to the leg arm barrel 200.

The fixed connection of the mounting member 310 to the leg arm cylinder 200 ensures that the wear-resistant member 320 covered by the mounting member 310 will not fall off the outer side wall of the leg arm cylinder 200 during the movement of the leg, thereby ensuring the stability of the anti-friction assembly 300 and further ensuring the stability of the leg during the movement, so as to achieve the good stability of the aerial platform truck with the leg during the operation.

In addition, the mounting member 310 can be detached from the leg arm cylinder 200, so that the anti-friction assembly 300 has better convenience in mounting and detaching.

Specifically, the mounting member 310 is fixedly attached to the outer side wall of the leg arm barrel 200 by bolts, and the mounting member 310 can be detached from the outer side wall of the leg arm barrel 200 by detaching the bolts.

As shown in fig. 1, a mounting plate 400 is fixed to an outer side wall of the leg arm cylinder 200, and the mounting member 310 is detachably and fixedly attached to the mounting plate 400.

The mounting member 310 is fixedly coupled to the mounting plate 400 on the outer sidewall of the leg arm cylinder 200, so that the wear member 320 covered by the mounting member 310 is prevented from falling off the outer sidewall of the leg arm cylinder 200, thereby ensuring reliability and stability of the anti-friction assembly 300 during the leg movement.

The mounting member 310 may be detached from the mounting plate 400 attached to the outer sidewall of the leg arm cylinder 200, so that the mounting and detachment of the mounting member 310 from the outer sidewall of the leg arm cylinder 200 may be achieved, and the anti-friction member 300 may be mounted and detached from the outer sidewall of the leg arm cylinder 200, thereby achieving more convenient solution of the problem of the friction force between the leg arm 100 and the leg arm cylinder 200 at the time of the leg exercise as described above.

Specifically, the mount plate 400 is fixed to the outer sidewall of the leg arm tube 200 by welding, the mount 310 is fixedly attached to the mount plate 400 by bolts so that the mount 310 can be fixedly attached to the outer sidewall of the leg arm tube 200, and the mount 310 can be detached from the mount plate 400 by detaching the bolts so that the mount 310 can be detached from the outer sidewall of the leg arm tube 200.

Optionally, the mounting member 310 is a sealing plate.

As shown in fig. 1 and 2, the mounting plate 400 is provided with a third mounting through hole 410 aligned with the first mounting through hole 210 on the side wall of the leg arm cylinder 200, at least a part of the wear-resistant member 320 is disposed in the third mounting through hole 410 and the first mounting through hole 210, and the axial length of the wear-resistant member 320 is greater than the width of the gap between the inner side wall of the leg arm cylinder 200 and the outer side wall of the leg arm 100.

The third mounting through hole 410 on the mounting plate 400 is aligned with the first mounting through hole 210 on the side wall of the leg arm cylinder 200, so that the wear-resistant member 320 can enter the leg arm cylinder 200 from the third mounting through hole 410 on the mounting plate 400 and the first mounting through hole 210 on the side wall of the leg arm cylinder 200 in sequence, and further the wear-resistant member 320 can contact with the outer side wall of the leg arm 100 during the leg movement, so that the purpose that the outer side wall of the leg arm 100 does not directly contact with the inner side wall of the leg arm cylinder 200 is achieved, and the problem of rigid friction between the outer side wall of the leg arm 100 and the inner side wall of the leg arm cylinder 200 during the leg movement is solved.

In addition, since the axial length of the wear-resistant member 320 is greater than the width of the gap between the inner sidewall of the leg arm cylinder 200 and the outer sidewall of the leg arm 100, the wear-resistant member 320 can be prevented from falling from the gap between the inner sidewall of the leg arm cylinder 200 and the outer sidewall of the leg arm 100 during the leg movement, so as to further ensure the stability of the wear-resistant member 320 during the leg movement, thereby ensuring the movement stability of the leg.

As shown in fig. 1 and 2, the first mounting through holes 210 have groups, multiple groups of the first mounting through holes 210 are arranged at intervals along the circumferential direction of the leg arm cylinder 200, and each group of the first mounting through holes 210 includes two first mounting through holes 210 arranged at intervals along the axial direction of the leg arm cylinder 200;

there are multiple sets of anti-friction assemblies 300, the multiple sets of anti-friction assemblies 300 are arranged at intervals along the circumference of the leg arm barrel 200, and each set of anti-friction assemblies 300 includes two anti-friction assemblies 300 arranged at intervals along the axial direction of the leg arm barrel 200.

The wear members 320 of all the anti-friction assemblies 300 are disposed in all the first mounting through holes 210 in a one-to-one correspondence.

Because the multiple sets of first mounting through holes 210 and the multiple sets of antifriction assemblies 300 are arranged along the circumferential interval of the landing leg arm cylinder 200, and the wear-resistant pieces 320 of all the antifriction assemblies 300 are arranged in all the first mounting through holes 210 in a one-to-one correspondence manner, it can be ensured that when the landing leg moves, the outer side wall of the landing leg arm 100 can be in contact with the wear-resistant pieces 320 of the antifriction assemblies 300 in the circumferential direction, so that the phenomenon that the landing leg seriously shakes during the movement is avoided, and meanwhile, the inner side wall of the landing leg arm cylinder 200 is not in direct contact with the outer side wall of the landing leg arm 100 in the circumferential direction, and a better antifriction effect between the landing leg and the landing leg arm cylinder is realized.

In addition, because each set of first mounting through holes 210 includes two first mounting through holes 210 arranged along the axial direction of the leg arm barrel 200 at intervals, each set of anti-friction assemblies 300 includes two anti-friction assemblies 300 arranged along the axial direction of the leg arm barrel 200 at intervals, and the wear-resistant pieces 320 of the two anti-friction assemblies 300 of each set of anti-friction assemblies 300 are arranged in the two first mounting through holes 210 of each set of first mounting through holes 210 in a one-to-one correspondence manner, it can be ensured that the stress on the outer side wall of the leg arm 100 in the axial direction is reduced when the above-mentioned leg moves, thereby further ensuring the stability of the above-mentioned leg in the moving process, and simultaneously preventing the damage of the excessive stress on the outer side wall of the leg arm 100.

Specifically, the distance between two first mounting through holes 210 of each set of first mounting through holes 210, which are spaced apart in the axial direction of the leg arm cylinder 200, is determined by the stroke of the leg, and generally, the larger the distance between the two is, the better; and the distance between two anti-friction assemblies 300 of each set of anti-friction assemblies 300 spaced apart in the axial direction of the leg arm barrel 200 is determined by the travel of the leg, generally the greater the distance between the two the better.

As shown in fig. 1, the leg arm cylinder 200 and the leg arm 100 are each a quadrangular prism;

there are four sets of anti-friction assemblies 300, and the four sets of anti-friction assemblies 300 are respectively arranged on one ends of the four outer side walls of the leg arm cylinder 200 close to the leg arm 100.

Because the landing leg arm barrel 200 and the landing leg arm 100 are quadrangular prisms, and the four groups of antifriction components 300 are respectively arranged on the four outer side walls of the landing leg arm barrel, it can be ensured that the four outer side walls of the landing leg arm 100 can be in contact with the antifriction components 300 when the landing leg moves, so that the four outer side walls of the landing leg arm 100 are not in direct contact with the four inner side walls of the landing leg arm barrel 200, a better antifriction effect is realized, and meanwhile, the landing leg has better stability in the moving process.

In addition, because the four anti-friction assemblies 300 are respectively arranged at one end of the four outer side walls of the leg arm cylinder 200 close to the leg arm 100, the anti-friction assemblies 300 can play a role in preventing the outer side walls of the leg arm 100 and the outer side walls of the leg arm cylinder 200 from generating rigid friction at any time when the leg arm 100 moves in the leg arm cylinder 200.

As shown in fig. 3, the wear-resistant member 320 is a slider made of ultra-high molecular weight polyethylene.

The ultra-high molecular weight polyethylene has the characteristics of ultra-high wear resistance, low surface hardness and the like, and the low surface hardness ensures that rigid friction cannot be generated when the outer side wall of the supporting leg arm 100 is in contact with the sliding block when the supporting leg moves, so that the phenomenon that paint on the surface of the outer side wall of the supporting leg arm 100 is scraped is avoided. Meanwhile, the wear-resistant sliding block has super-strong wear resistance, so that the service life of the sliding block is ensured, and a better wear-resistant effect is realized.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the utility model have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the utility model, the scope of which is defined by the claims and their equivalents.

Claims (10)

1. A leg, comprising:

a leg arm;

the supporting leg arm barrel is sleeved on the supporting leg arm, the supporting leg arm can move relative to the supporting leg arm barrel, and a first mounting through hole is formed in the side wall of the supporting leg arm barrel; and

antifriction subassembly, antifriction subassembly includes wearing parts and installed part, wearing parts at least part set up in the first mounting through-hole, wearing parts be used for with the contact of landing leg arm, so that the lateral wall of landing leg arm with the inside wall looks interval of a landing leg arm section of thick bamboo, the installed part is connected on the lateral wall of a landing leg arm section of thick bamboo to cover the wearing parts.

2. The landing leg of claim 1, wherein the mounting member is provided with a connecting portion at one side thereof, the wear member is provided with a second mounting through hole, and the connecting portion is inserted into the second mounting through hole.

3. A leg as claimed in claim 2, characterized in that the wear part is provided with a friction surface for contact with an outer side wall of the leg arm.

4. The leg of claim 1, wherein at least one thickening is provided between the wear member and the mounting member.

5. The leg of claim 1, wherein the mounting member is removably fixedly connected to the leg arm cylinder.

6. The leg of claim 5, wherein a mounting plate is fixedly attached to an outer side wall of the leg arm cylinder, and the mounting member is removably fixedly attached to the mounting plate.

7. The leg of claim 6, wherein a third mounting through hole is provided in the mounting plate, the third mounting through hole is aligned with the first mounting through hole, at least a portion of the wear member is disposed in both the third mounting through hole and the first mounting through hole, and an axial length of the wear member is greater than a width of a gap between an inner sidewall of the leg arm barrel and an outer sidewall of the leg arm.

8. The leg as claimed in claim 1, wherein there are a plurality of sets of the first mounting through holes, the plurality of sets of the first mounting through holes are arranged at intervals along a circumferential direction of the leg arm cylinder, each set of the first mounting through holes comprises two first mounting through holes arranged at intervals along an axial direction of the leg arm cylinder;

the anti-friction assemblies are arranged in a plurality of groups at intervals along the circumferential direction of the supporting leg arm cylinder, and each group of anti-friction assemblies comprises two anti-friction assemblies arranged at intervals along the axial direction of the supporting leg arm cylinder;

the wear-resistant pieces of all the anti-friction assemblies are arranged in all the first mounting through holes in a one-to-one correspondence manner.

9. The leg of claim 8, wherein the leg arm cylinder and the leg arm are each a quadrangular prism;

the anti-friction components are arranged in four groups, and the four groups of anti-friction components are respectively arranged on one ends, close to the supporting leg arms, of the four outer side walls of the supporting leg arm cylinder.

10. The leg of claim 1, wherein the wear member is a slider block made of ultra high molecular weight polyethylene.

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