CN111924708B

CN111924708B - Spacing subassembly of swing landing leg and hoist

Info

Publication number: CN111924708B
Application number: CN202011081452.9A
Authority: CN
Inventors: 刘建培; 张志敏
Original assignee: Hunan Sany Medium Lifting Machinery Co Ltd
Current assignee: Hunan Sany Medium Lifting Machinery Co Ltd
Priority date: 2020-10-12
Filing date: 2020-10-12
Publication date: 2021-03-12
Anticipated expiration: 2040-10-12
Also published as: CN111924708A

Abstract

The embodiment of the invention provides a swing supporting leg limiting assembly and a crane, and relates to the field of cranes. This spacing subassembly of swing landing leg includes: the mounting seat is used for being mounted on the crane; the supporting leg part is rotationally connected with the mounting seat and is used for being in transmission connection with a power part of the crane; the limiting part is connected with the mounting seat and used for limiting the supporting leg part at a first stopping position under the condition that the supporting leg part rotates around a first rotating direction relative to the mounting seat, and the limiting part is also used for limiting the supporting leg part at a second stopping position under the condition that the supporting leg part rotates around a second rotating direction relative to the mounting seat, wherein the first rotating direction is opposite to the second rotating direction, and the supporting leg part rotates in the range between the first stopping position and the second stopping position. The embodiment of the invention has the advantages of simple structure, reliable performance, strong operability and good universality.

Description

Spacing subassembly of swing landing leg and hoist

Technical Field

The invention relates to the field of cranes, in particular to a swing supporting leg limiting assembly and a crane.

Background

The swing supporting leg of the crane bears all loads of the whole crane during hoisting, the swing angle needs to be adjusted in time according to different actual operation working conditions, and the limit of the supporting leg is very important for ensuring the swing angle.

At present, the limit of the swing supporting leg is mostly guaranteed by the stroke of a hydraulic oil cylinder, the swing angle cannot be adjusted in real time, the swing angle needs to be changed, only the oil cylinders with different strokes can be replaced, the cost is high, and the swing supporting leg is inconvenient.

Disclosure of Invention

The invention aims to provide a swing supporting leg limiting assembly and a crane, which are simple in structure, reliable in performance, strong in operability and good in universality.

The embodiment of the invention is realized by the following steps:

in a first aspect, an embodiment of the present invention provides a swing leg limiting assembly for a crane, where the swing leg limiting assembly includes:

the mounting seat is used for being mounted on the crane;

the supporting leg part is rotatably connected with the mounting seat and is used for being in transmission connection with a power part of the crane;

the locating part, the locating part with the mount pad is connected, is used for landing leg spare is relative the mount pad is around first rotation direction pivoted circumstances, and is spacing landing leg spare is in first backstop position, just the locating part still be used for landing leg spare is relative the mount pad is around second rotation direction pivoted circumstances, and is spacing landing leg spare is in second backstop position, wherein, first rotation direction with second rotation direction is opposite, landing leg spare is in first backstop position with the within range internal rotation between the second backstop position.

In an optional embodiment, the limiting member includes an installation portion, a first limiting portion and a second limiting portion, the first limiting portion and the second limiting portion are both connected to the installation portion, at least one of the first limiting portion and the second limiting portion protrudes relative to the installation portion, and the installation portion is detachably connected to the installation seat;

the supporting leg piece comprises a supporting leg body and a stopping bulge which are connected with each other, the supporting leg body is rotationally connected with the mounting seat, and the stopping bulge protrudes towards the direction far away from the rotating axis of the supporting leg body;

the first limiting part and the stop boss are abutted against the first stop position, and the second limiting part and the supporting leg body are stopped at the second stop position.

In an alternative embodiment, the rotatable angle of the leg member is complementary to the included angle of the first and second position-limiting parts.

In an optional embodiment, the first position-limiting part is provided with a first position-limiting surface, and the second position-limiting part is provided with a second position-limiting surface; the supporting leg body is provided with a first stopping surface, the supporting leg body is provided with a second stopping surface, the first limiting surface is abutted to the first stopping position with the first stopping surface, and the second limiting surface is abutted to the second stopping position with the second stopping surface.

In an optional embodiment, the first limiting surface and the second limiting surface are arranged at an included angle; the first stop surface and the second stop surface are arranged at an included angle, or the first stop surface and the second stop surface are parallel.

In an alternative embodiment, the first position-limiting portion extends in an arc shape, and the first position-limiting surface is disposed on an end surface of the first position-limiting portion and can be attached to the first stop surface.

In an optional embodiment, the swing leg limiting assembly further comprises a rotating shaft, and the rotating shaft is respectively connected with the leg piece and the mounting seat and is used for enabling the leg piece to be rotatably connected with the mounting seat; the cross section width of the stop protrusion is smaller than the diameter of the rotating shaft.

In an optional embodiment, the mounting seat includes a seat body, a first support and a second support, the first support and the second support are opposite and both connected to the seat body, the leg member is rotatably connected to the first support and the second support, and the limiting member is connected to the first support and/or the second support.

In an optional embodiment, the number of the limiting members is two, the limiting members are respectively arranged on the first support and the second support, the leg member is provided with two stopping protrusions, and the two stopping protrusions are correspondingly connected with the two limiting members.

In a second aspect, an embodiment of the invention provides a crane, including a swing leg limiting assembly as described in any one of the previous embodiments.

The embodiment of the invention provides a swing supporting leg limiting assembly and a crane, wherein the swing supporting leg limiting assembly comprises: the swing supporting leg limiting assembly comprises a mounting seat, a supporting leg piece and a limiting piece supporting leg piece, wherein the supporting leg piece is rotatably connected with the mounting seat, and the supporting leg piece is used for being in transmission connection with a power component of a crane. The limiting part is connected with the mounting seat and used for limiting the supporting leg part at a first stop position under the condition that the supporting leg part rotates around the first rotating direction relative to the mounting seat, and the limiting part is also used for limiting the supporting leg part at a second stop position under the condition that the supporting leg part rotates around the second rotating direction relative to the mounting seat. Under the action of the limiting piece, the supporting leg piece rotates in the range between the first stop position and the second stop position. I.e. the swing range of the leg member is between the first stop position and the second stop position. One of the first stop position and the second stop position is a swing-out stop position, and at the moment, the limiting piece realizes the swing-out limiting of the leg piece; the other is a swinging-back stopping position, and at the moment, the limiting piece realizes the swinging-back limiting of the supporting leg piece. According to the embodiment of the invention, the leg part rotates between the first stop position and the second stop position through the matching of the limiting part and the leg part, so that the limiting of the leg part is realized. Compared with the prior art that the limit is realized through the stroke of the hydraulic oil cylinder, the limit part is simple in structure and reliable in performance, and the hydraulic oil cylinder is high in operability and universality.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic structural diagram of a swing leg limiting assembly according to an embodiment of the present invention;

FIG. 2 is an enlarged schematic view of the structure at A in FIG. 1;

FIG. 3 is a schematic view of the swing leg stop assembly of FIG. 1 with the leg member in a first stop position;

FIG. 4 is a schematic view of the swing leg stop assembly of FIG. 1 with the leg member in a second stop position;

FIG. 5 is a schematic view of the leg member of FIG. 1;

FIG. 6 is a schematic structural diagram of the limiting element in FIG. 1;

fig. 7 is a schematic structural view of a swing leg limiting assembly when another limiting member is provided in the embodiment of the present invention;

fig. 8 is a schematic structural diagram of a swing leg limiting assembly when there is another limiting member according to an embodiment of the present invention.

Icon: 100-swing leg limit assembly; 101-a first direction of rotation; 102-a second rotational direction; 103-a first stop position; 104-a second stop position; 110-a mount; 111-seat body; 112-a first support; 113-a second support; 120-a leg member; 121-a first stop surface; 122-a second stop surface; 123-stop projection; 124-a leg body; 130-a limit piece; 131-a first limiting surface; 132-a second limiting surface; 133-a mounting portion; 134-a first stop; 135-a second limiting part; 140-rotating shaft.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or the orientations or positional relationships that the products of the present invention are conventionally placed in use, and are only used for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical" and the like do not imply that the components are required to be absolutely horizontal or pendant, but rather may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; 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.

Referring to fig. 1 to 4, an embodiment of the invention provides a swing leg limiting assembly 100. The swing leg limiting assembly 100 can be used for engineering machinery, such as a crane and the like; the swing supporting leg limiting assembly 100 provided by the embodiment of the invention has the advantages of simple structure, reliable performance, strong operability and good universality.

In this embodiment, the swing leg limiting assembly 100 includes: the mounting base 110, the leg member 120, the limiting member 130 and the rotating shaft 140. The leg member 120 is rotatably connected to the mounting base 110 through a rotating shaft 140, and the limiting member 130 is connected to the mounting base 110 and is used for limiting a rotation angle (or a rotation range, a stroke) of the leg member 120 relative to the mounting base 110. The mounting seat 110 is used for mounting on a crane; the supporting leg member 120, the supporting leg member 120 is rotatably connected with the mounting base 110, and the supporting leg member 120 is used for being in transmission connection with a power component of the crane.

It should be understood that in the present embodiment, the leg member 120 is rotatably connected to the mounting base 110 via the rotating shaft 140, which is only one possible way of rotatably connecting the leg member 120 and the mounting base 110; that is, the leg member 120 may be connected to the mounting base 110 in a rotatable manner in other configurations.

In the embodiment of the present invention, the limiting member 130 is connected to the mounting base 110, and is configured to limit the leg member 120 at the first stopping position 103 when the leg member 120 rotates relative to the mounting base 110 in the first rotating direction 101, and the limiting member 130 is further configured to limit the leg member 120 at the second stopping position 104 when the leg member 120 rotates relative to the mounting base 110 in the second rotating direction 102, wherein the first rotating direction 101 is opposite to the second rotating direction 102, and the leg member 120 rotates in a range between the first stopping position 103 and the second stopping position 104.

It should be noted that the first rotation direction 101 and the second rotation direction 102 are opposite, and the relative rotation directions of the leg member 120 and the mounting seat 110 can be clockwise or counterclockwise, that is, the first rotation direction 101 and the second rotation direction 102 can be clockwise and counterclockwise, respectively. It will be appreciated that for different reference angles, the counter-clockwise and clockwise directions may be reversed, but the opposite nature of the two directions does not change.

Meanwhile, in the present embodiment, the leg member 120 rotates between the first stop position 103 and the second stop position 104, that is, the swing range of the leg member 120 is between the first stop position 103 and the second stop position 104. Namely, one of the first stopping position 103 and the second stopping position 104 is a swing-out stopping position, and at this time, the limiting member 130 realizes the swing-out limiting of the leg member 120; the other is a swing-back stop position, and at this time, the limiting member 130 realizes the swing-back limiting of the leg member 120.

In the embodiment of the invention, the limiting member 130 is matched with the leg supporting member 120, so that the leg supporting member 120 rotates between the first stopping position 103 and the second stopping position 104, and the leg supporting member 120 is limited. Compared with the prior art of limiting through the stroke of the hydraulic oil cylinder, the limiting part 130 is simple in limiting structure, reliable in performance, strong in operability and good in universality. In addition, when the angle limitation is realized through the stroke of the hydraulic oil cylinder, if the swing angle is changed, the oil cylinders with different strokes need to be replaced, so that the problems of high cost and inconvenient replacement are caused. In the embodiment of the present invention, when the swing angle is changed, only the different limiting members 130 need to be replaced (described in detail below), so that the economic cost investment is reduced, and the replacement is more convenient and simpler.

Referring to fig. 5 and fig. 6, in an alternative embodiment, the limiting member 130 is provided with a first limiting surface 131 and a second limiting surface 132, and the first limiting surface 131 and the second limiting surface 132 are respectively matched with the leg member 120 to realize the stop limiting of the leg member 120. In this embodiment, when the leg member 120 abuts against the first limiting surface 131, the leg member 120 is located at the first stopping position 103; when the leg member 120 abuts against the second position-limiting surface 132, the leg member 120 is located at the second stopping position 104.

Optionally, the first limiting surface 131 and the second limiting surface 132 are both planar surfaces; certainly, not limited to this, in other embodiments of the present invention, the first limiting surface 131 and the second limiting surface 132 may also be arc surfaces, and at this time, the corresponding surfaces on the leg member 120 also correspond to the first limiting surface 131 and the second limiting surface 132, so as to increase the area when the two are in contact and abutting, and ensure uniform stress.

In an alternative embodiment, the leg member 120 is provided with a first stop surface 121 and a second stop surface 122, the first stop surface 121 being capable of abutting the first restraining surface 131 to restrain the leg member 120 in the first stop position 103; the second stop surface 122 can abut against the second limiting surface 132 to limit the leg member 120 at the second stop position 104.

As mentioned above, the first stop surface 121 and the first limit surface 131 are abutted, and both may be a plane, a corresponding arc surface, etc. to ensure the joint area of the two when abutted, thereby ensuring uniform stress and avoiding or reducing the possibility of local fatigue failure; similarly, the second stopping surface 122 and the second limiting surface 132 may be the same plane, the corresponding arc surface, etc. to ensure uniform stress and avoid or reduce local failure.

It should be understood that the above-mentioned "corresponding arc" means that the concave surface and the convex surface cooperate to increase the abutting fitting area of the two. In order to increase the contact area between the first stop surface 121 and the corresponding first stopper surface 131, the second stop surface 122, and the corresponding second stopper surface 132, the first stop surface 121 and the corresponding second stopper surface 131 may be provided as arc-shaped surfaces or concave-convex surfaces, and these surfaces correspond to each other, i.e., may substantially completely abut against each other.

Further, the first position-limiting surface 131 and the second position-limiting surface 132 form an included angle; the first stop surface 121 is disposed at an angle to the second stop surface 122, or the first stop surface 121 is parallel to the second stop surface 122.

Optionally, the leg member 120 includes a leg body 124 and a stopping protrusion 123 connected to the leg body 124, the stopping protrusion 123 protrudes in a direction away from the rotation axis of the leg member 120, the first stopping surface 121 is disposed on the stopping protrusion 123, and the second stopping surface is disposed on the leg body 124.

It should be understood that the leg member 120 may be rotatably connected to the mounting base 110 through the rotating shaft 140, and the cross-sectional width of the stopping protrusion 123 is smaller than the diameter of the rotating shaft 140, so that the structural design of the stopping protrusion 123 realizes the limiting stopping by the first stopping surface 121 disposed on the stopping protrusion 123 after rotating a certain angle, and the use area can be saved by disposing the stopping protrusion 123, thereby achieving the effect of limiting stopping.

In this embodiment, the limiting member 130 may include an installation portion 133, a first limiting portion 134 and a second limiting portion 135, the first limiting portion 134 and the second limiting portion 135 are both connected to the installation portion 133, at least one of the first limiting portion 134 and the second limiting portion 135 protrudes relative to the installation portion 133, the first limiting surface 131 is disposed on the first limiting portion 134, the second limiting portion 135 is disposed on the second limiting portion 135, and the installation portion 133 is detachably connected to the installation base 110.

It should be noted that, the protruding distances of the first limiting portion 134 and the second limiting portion 135 relative to the mounting portion 133 are related to the first stopping position 103 and the second stopping position 104 of the leg member 120, that is, the first limiting portion 134 and the second limiting portion 135 with different protruding distances can be set, so as to adjust different swing angles of the leg member 120; that is to say, the adjustment of different swing angles of the leg member 120 can be realized by replacing the limiting members 130 of different first limiting portions 134 and second limiting portions 135, and compared with the prior art that hydraulic cylinders with different strokes are replaced, the adjustment is simple to operate and low in cost.

It should be understood that the rotatable angle of the leg member 120 is complementary to the included angle of the first and second position-limiting

portions

134 and 135, wherein the included angle of the first and second position-limiting

portions

134 and 135 is the included angle of the first and second position-limiting

surfaces

131 and 132.

Optionally, the first position-limiting portion 134 extends in an arc shape, and the first position-limiting surface 131 is disposed on an end surface of the first position-limiting portion 134 and can be attached to the first stopping surface 121. The first position-limiting portion 134 extends for different distances, and the matching positions of the first position-limiting surface 131 and the first stopping surface 121 are different, so that the first stopping position 103 of the leg member 120 is different, please refer to fig. 7 and 8, which show the swinging angle of the leg member 120 under two different position-limiting members 130, that is, the structure diagram at the first stopping position 103. Where a refers to the angle of oscillation, in this embodiment, the second stop surface 122 and the second limit surface 132 are substantially flush with the base when they are mated; of course, it is not limited thereto.

In an alternative embodiment, the mounting base 110 may include a base body 111, a first support 112 and a second support 113, the first support 112 and the second support 113 are opposite and both connected to the base body 111, the leg member 120 is rotatably connected to the first support 112 and the second support 113, and the limiting member 130 is connected to the first support 112 and/or the second support 113.

Optionally, the limiting member 130 is connected to the first support 112 and/or the second support 113 through a bolt; the mounting portion 133 of the limiting member 130 is provided with a through hole for a bolt to pass through, and the first support 112 and/or the second support 113 are provided with a threaded hole opposite to the through hole on the mounting portion 133, so that the limiting member 130 is fixed on the first support 112 and/or the second support 113 by the bolt.

In an alternative embodiment, in order to improve the structural reliability, the number of the limiting members 130 may be two and disposed on the first support 112 and the second support 113, respectively; correspondingly, two stopping protrusions 123 are disposed on the leg member 120, and the two stopping protrusions 123 are correspondingly connected with the two limiting members 130.

An embodiment of the invention provides a crane, which comprises a swing leg limiting assembly 100 as described in any one of the previous embodiments.

Referring to fig. 1 to 8, a swing leg limiting assembly 100 and a crane according to an embodiment of the present invention: the swing leg limiting assembly 100 comprises a mounting base 110, a leg member 120 and a limiting member 130. the leg member 120 is rotatably connected with the mounting base 110, and the leg member 120 is used for being in transmission connection with a power component of a crane. The limiting member 130 is connected to the mounting base 110 for limiting the leg member 120 at the first stopping position 103 when the leg member 120 rotates around the first rotating direction 101 relative to the mounting base 110, and the limiting member 130 is further used for limiting the leg member 120 at the second stopping position 104 when the leg member 120 rotates around the second rotating direction 102 relative to the mounting base 110. Under the action of the limiting member 130, the leg member 120 rotates in a range between the first stopping position 103 and the second stopping position 104. I.e. the swing range of the leg member 120 is between the first stop position 103 and the second stop position 104. Namely, one of the first stopping position 103 and the second stopping position 104 is a swing-out stopping position, and at this time, the limiting member 130 realizes the swing-out limiting of the leg member 120; the other is a swing-back stop position, and at this time, the limiting member 130 realizes the swing-back limiting of the leg member 120. In the embodiment of the invention, the limiting member 130 is matched with the leg supporting member 120, so that the leg supporting member 120 rotates between the first stopping position 103 and the second stopping position 104, and the leg supporting member 120 is limited. Compared with the prior art of limiting through the stroke of the hydraulic oil cylinder, the limiting part 130 is simple in limiting structure, reliable in performance, strong in operability and good in universality.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A swing leg limiting assembly for a crane, the swing leg limiting assembly (100) comprising:

a mounting base (110), the mounting base (110) being for mounting on the crane;

the supporting leg piece (120), the supporting leg piece (120) is rotatably connected with the mounting seat (110), and the supporting leg piece (120) is used for being in transmission connection with a power component of the crane;

a limiting member (130), wherein the limiting member (130) is connected to the mounting base (110) and is configured to limit the leg member (120) at a first stopping position (103) when the leg member (120) rotates relative to the mounting base (110) in a first rotating direction (101), and the limiting member (130) is further configured to limit the leg member (120) at a second stopping position (104) when the leg member (120) rotates relative to the mounting base (110) in a second rotating direction (102), wherein the first rotating direction (101) is opposite to the second rotating direction (102), and the leg member (120) rotates in a range between the first stopping position (103) and the second stopping position (104);

the limiting part (130) comprises an installation part (133), a first limiting part (134) and a second limiting part (135), the installation part (133) is detachably connected with the installation seat (110), the first limiting part (134) and the second limiting part (135) are both connected with the installation part (133), at least one of the first limiting part (134) and the second limiting part (135) protrudes relative to the installation part (133), and different swing angles of the leg part (120) can be adjusted by replacing the first limiting part (134) with different protruding distances and the limiting part (130) of the second limiting part (135) with different protruding distances;

the leg piece (120) comprises a leg body (124) and a stop projection (123) which are connected with each other, the leg body (124) is rotatably connected with the mounting seat (110), and the stop projection (123) projects in a direction away from the rotation axis of the leg body (124);

the first limiting part (134) and the stopping protrusion (123) are abutted against the first stopping position (103), and the second limiting part (135) and the supporting leg body (124) are stopped at the second stopping position (104);

the first limiting part (134) is provided with a first limiting surface (131), and the second limiting part (135) is provided with a second limiting surface (132); the stop protrusion (123) is provided with a first stop surface (121), the leg body (124) is provided with a second stop surface (122), the first limit surface (131) and the first stop surface (121) are abutted against the first stop position (103), and the second limit surface (132) and the second stop surface (122) are abutted against the second stop position (104);

the first limiting portion (134) extends in an arc shape, and the first limiting surface (131) is arranged on the end surface of the first limiting portion (134) and can be attached to the first stopping surface (121).

2. The swing leg limiting assembly according to claim 1, wherein the first limiting surface (131) is arranged at an angle to the second limiting surface (132), and the leg member (120) is rotatable at an angle complementary to the angle of the first limiting surface (131) and the second limiting surface (132).

3. The swing leg limiting assembly according to claim 1, wherein the first limiting surface (131) is disposed at an angle to the second limiting surface (132); the first stop surface (121) and the second stop surface (122) are arranged at an included angle, or the first stop surface (121) and the second stop surface (122) are parallel.

4. The swing leg restraint assembly of claim 1 wherein the swing leg restraint assembly (100) further comprises a pivot shaft (140), the pivot shaft (140) being connected to the leg member (120) and the mounting base (110), respectively, for rotatably connecting the leg member (120) to the mounting base (110); the cross-sectional width of the stop protrusion (123) is smaller than the diameter of the rotating shaft (140).

5. The swing leg limiting assembly according to claim 1, wherein the mounting seat (110) comprises a seat body (111), a first seat (112) and a second seat (113), the first seat (112) and the second seat (113) are opposite to each other and are connected to the seat body (111), the leg member (120) is rotatably connected to the first seat (112) and the second seat (113), and the limiting member (130) is connected to the first seat (112) and/or the second seat (113).

6. The swing leg limiting assembly according to claim 5, wherein the number of the limiting members (130) is two, and the limiting members are respectively disposed on the first support (112) and the second support (113), the leg member (120) is provided with two stopping protrusions (123), and the two stopping protrusions (123) are correspondingly connected with the two limiting members (130).

7. A crane, comprising a swing leg limiting assembly (100) according to any one of claims 1-6.