阅读说明：本技术 一种支腿固定装置、支腿组件和工程机械 (Landing leg fixing device, landing leg assembly and engineering machinery ) 是由 张录岩 盛新兰 莫绪伦 于 2021-07-27 设计创作，主要内容包括：本发明提供了一种支腿固定装置、支腿组件和工程机械,该支腿固定装置包括底座、安装座、第一限位件和第二限位件,其中,安装座设有导槽结构,安装座适于罩设于底座,安装座的其中一侧面设有与导槽结构相通的开口,安装座的顶面上设有一滑孔,滑孔联通于开口以使安装座可相对于支腿滑动；第一限位件设置在导槽结构内,第一限位件包括第一限位部和第二限位部,安装座上对应第一限位部设有配合部；第二限位件设置在安装座上；当支腿处于锁止状态时,第二限位部压设于支腿,第一限位部与配合部配合以限制支腿沿着朝向开口的方向与安装座产生相对位移,第二限位件用于限制支腿沿着背离开口的方向与安装座11产生相对位移。(The invention provides a supporting leg fixing device, a supporting leg assembly and engineering machinery, wherein the supporting leg fixing device comprises a base, a mounting seat, a first limiting piece and a second limiting piece, wherein the mounting seat is provided with a guide groove structure and is suitable for covering the base; the first limiting piece is arranged in the guide groove structure and comprises a first limiting part and a second limiting part, and a matching part is arranged on the mounting seat corresponding to the first limiting part; the second limiting piece is arranged on the mounting seat; when the landing leg is in the locking state, the second limiting part is pressed on the landing leg, the first limiting part is matched with the matching part to limit the landing leg to generate relative displacement with the mounting seat along the direction towards the opening, and the second limiting part is used for limiting the landing leg to generate relative displacement with the mounting seat 11 along the direction away from the opening.)

1. A leg securing device, comprising:

a base;

the mounting seat is provided with a guide groove structure and is suitable for covering the base, an opening communicated with the guide groove structure is formed in one side surface of the mounting seat, a sliding hole is formed in the top surface of the mounting seat, and the sliding hole is communicated with the opening so that the mounting seat can slide relative to the supporting leg;

the first limiting piece is arranged in the guide groove structure and comprises a first limiting part and a second limiting part, and a matching part is arranged on the mounting seat corresponding to the first limiting part;

the second limiting piece is arranged on the mounting seat;

when the landing leg is in a locking state, the second limiting part is pressed on the landing leg, the first limiting part is matched with the matching part to limit the landing leg to generate relative displacement with the mounting seat along the direction towards the opening, and the second limiting part is used for limiting the landing leg to generate relative displacement with the mounting seat along the direction away from the opening.

2. The leg fixing device according to claim 1, wherein the first limiting member further comprises a connecting portion, the connecting portion is respectively connected to the first limiting portion and the second limiting portion, the connecting portion has a contracted state, and the connecting portion is adapted to extend the first limiting portion into the guide groove structure in the contracted state.

3. The leg fixing device of claim 2 wherein the connecting portion comprises first and second resilient members adapted to move towards each other to extend into the channel formation; the first elastic piece and/or the second elastic piece are/is provided with the first limiting part.

4. The leg fixing device according to claim 2, wherein the first limiting portion is a clip structure and the engaging portion is a clip structure engaged with the clip structure, or the first limiting portion is a clip structure and the engaging portion is a clip structure engaged with the clip structure; the clamping block structure is suitable for being clamped in the clamping groove structure.

5. The leg fixing device according to claim 3, wherein the connecting portion further comprises a force applying structure, and the force applying structure is disposed on each of the first elastic member and the second elastic member and is configured to move the first elastic member and the second elastic member toward each other under a force.

6. The leg fixing device according to claim 5, wherein the second position-limiting portion is elastically connected to the connecting portion, the second position-limiting portion is adapted to move relative to the connecting portion in a state where the leg applies a downward force to the second position-limiting portion, and the second position-limiting portion is further adapted to abut against a top wall of the guide groove structure in a state where the leg applies an upward force to the second position-limiting portion.

7. The leg fixing device according to claim 1, wherein the second limiting member includes a pin and a fastener, the pin is disposed on the mounting seat, a portion of the pin is located in the guide groove structure, and the pin is adapted to be limited on the mounting seat by the fastener.

8. The supporting leg fixing device as claimed in claim 7, wherein the pin shaft comprises a first shaft body and a second shaft body, the first shaft body and the second shaft body are arranged at an angle, the mounting seat is provided with a pin shaft hole communicated with the guide groove structure, the second shaft body is arranged on the mounting seat in a penetrating manner through the pin shaft hole, and one end of the second shaft body penetrating through the mounting seat is connected with the fastener.

9. A leg assembly, comprising a leg and a leg fixture as claimed in any one of claims 1 to 8, the leg being connected to the leg fixture.

10. A working machine comprising a leg fixing as claimed in any one of claims 1 to 8 and/or a leg assembly as claimed in claim 9.

Technical Field

The invention relates to the technical field of engineering machinery, in particular to a supporting leg fixing device, a supporting leg assembly and engineering machinery.

Background

The supporting leg disc is a device commonly used in engineering machinery, for example, in a crane, the supporting leg disc is mounted at the bottom of a movable supporting leg to form a contact part of the supporting leg and the ground during the operation of the crane. In the hoisting process, the weight of the crane and the weight of the hoisted heavy object are transmitted to the ground through the supporting foot disc, and the effect of stable hoisting is achieved.

When current leg dish and activity landing leg installation, after the guide slot of leg dish is slided into in the bottom of activity landing leg, it can realize spacing in order to restrict the landing leg and break away from the guide slot through the bolt, and simultaneously, it need use the spring catch to carry on spacingly in order to prevent that the bolt from breaking away from the leg dish, so in the use, it needs install the bolt to the leg dish earlier, then install the spring catch to the bolt on, not only lead to the installation effectiveness low, and at the in-process of activity landing leg motion, bolt and the easy separation of spring catch, after the bolt drops from the leg dish, the landing leg is very easily followed the roll-off on the leg dish, thereby cause the leg dish to lose.

Disclosure of Invention

The invention solves the problem of how to improve the installation efficiency of the support leg disc and reduce the falling probability of the support leg disc.

In order to solve the above problems, the present invention provides a leg fixing device, comprising:

a base;

the mounting seat is provided with a guide groove structure and is suitable for covering the base, an opening communicated with the guide groove structure is formed in one side surface of the mounting seat, a sliding hole is formed in the top surface of the mounting seat, and the sliding hole is communicated with the opening so that the mounting seat can slide relative to the supporting leg;

the first limiting piece is arranged in the guide groove structure and comprises a first limiting part and a second limiting part, and a matching part is arranged on the mounting seat corresponding to the first limiting part;

the second limiting piece is arranged on the mounting seat;

when the landing leg is in a locking state, the second limiting part is pressed on the landing leg, the first limiting part is matched with the matching part to limit the landing leg to generate relative displacement with the mounting seat along the direction towards the opening, and the second limiting part is used for limiting the landing leg to generate relative displacement with the mounting seat along the direction away from the opening. .

Optionally, the first limiting member further includes a connecting portion, the connecting portion is connected to the first limiting portion and the second limiting portion respectively, the connecting portion has a contracted state, and the connecting portion is adapted to be in the contracted state so that the first limiting portion extends into the guide groove structure.

Optionally, the connecting portion comprises a first resilient member and a second resilient member, the first resilient member and the second resilient member being adapted to move towards each other to project into the channel formation; the first elastic piece and/or the second elastic piece are/is provided with a first limiting part.

Optionally, the first limiting portion is of a clamping block structure, and the matching portion is of a clamping groove structure matched with the clamping block structure, or the first limiting portion is of a clamping groove structure, and the matching portion is of a clamping block structure matched with the clamping groove structure; the clamping block structure is suitable for being clamped in the clamping groove structure.

Optionally, the connecting portion further includes a force application structure, the force application structure is disposed on each of the first elastic member and the second elastic member, and the force application structure is configured to enable the first elastic member and the second elastic member to move towards each other in a stressed state.

Optionally, the second limiting portion is elastically connected to the connecting portion, the second limiting portion is adapted to move downward relative to the connecting portion in a state where the support leg applies a downward force to the second limiting portion, and the second limiting portion is further adapted to abut against a top wall of the guide groove structure (111) in a state where the support leg applies an upward force to the second limiting portion.

Optionally, the supporting leg fixing device further includes a pin and a fastener, the pin is disposed on the mounting seat, a part of the pin is located in the guide groove structure and spaced from the first limiting member, and the pin is adapted to be limited on the mounting seat by the fastener.

Optionally, the round pin axle includes first axle body and second axle body, first axle body with the second axle body is the angle setting, the mount pad be equipped with the communicating round pin shaft hole of guide slot structure, the second axle body passes through the round pin shaft hole wears to locate on the mount pad, just the second axle body pass the one end of mount pad with the fastener is connected.

It is another object of the present invention to provide a leg assembly comprising a leg and a leg fixture as described above, the leg being connected to the leg fixture.

It is a further object of the present invention to provide a work machine comprising a leg fixing arrangement as described above, and/or a leg assembly as described above.

Compared with the prior art, the invention has the beneficial effects that:

the setting of mount pad and base is convenient for cooperate with the landing leg, first locating part and second locating part are used for fixed landing leg, when the landing leg is in locking state, the landing leg is located to the spacing portion pressure of second of first locating part, the first spacing portion of first locating part cooperates with the cooperation portion of mount pad, be used for limiting the landing leg and produce relative displacement along the open-ended direction towards the mount pad with the mount pad, the second locating part is used for limiting the landing leg and produce relative displacement along deviating from open-ended direction with the mount pad, compared with the prior art, first locating part need not set up extra part, and the installation effectiveness is improved, and can prevent effectively that landing leg fixing device and landing leg from breaking away from, the probability that landing leg fixing device lost has been reduced.

Drawings

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

FIG. 2 is a schematic structural view of one embodiment of a mount of the present invention;

FIG. 3 is an enlarged view of a portion of FIG. 2 at A;

FIG. 4 is a cross-sectional view of one perspective of the mount of the present invention;

FIG. 5 is a schematic structural diagram of a first position limiting member according to an embodiment of the present invention;

FIG. 6 is a schematic structural diagram of a second position limiting member according to an embodiment of the present invention;

FIG. 7 is a schematic view of the engagement of one embodiment of the leg and leg securing device of the present invention;

figure 8 is a schematic diagram of the mating of another embodiment of the leg and leg securing device of the present invention.

Description of reference numerals:

1. a leg fixing device; 11. a mounting seat; 111. a guide groove structure; 112. a connecting plate; 113. a first side plate; 114. a second side plate; 115. a slide hole; 116. a first clamping structure; 117. an opening; 12. a first limit piece; 121. a connecting portion; 1211. a first elastic member; 1212. a second elastic member; 122. a second limiting part; 123. a force application structure, 124 and a second clamping structure; 13. a second limiting member; 131. a pin shaft; 1311. a first shaft body; 1312. a second shaft body; 132. a fastener; 14. a base; 2. and (7) supporting legs.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.

It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein.

The Z-axis in the drawings indicates a vertical direction, i.e., an up-down position, and a forward direction of the Z-axis (i.e., an arrow direction of the Z-axis) indicates an upward direction and a reverse direction of the Z-axis indicates a downward direction; the X-axis in the drawing represents the horizontal direction and is designated as the left-right position, and the forward direction of the X-axis represents the left side and the reverse direction of the X-axis represents the right side; the Y-axis in the drawings is represented as a front-rear position, and a forward direction of the Y-axis represents a front side and a reverse direction of the Y-axis represents a rear side; it should also be noted that the foregoing Z-axis, Y-axis, and X-axis representations are merely intended to facilitate the description of the invention and to simplify the description, and are not intended to 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 are not to be construed as limiting the invention.

As shown in fig. 1, an embodiment of the present invention provides a leg fixing device 1, including a base 14, a mounting seat 11, a first limiting member 12 and a second limiting member 13, where the mounting seat 11 is provided with a guide groove structure 111, the mounting seat 11 is adapted to cover the base 14, one side surface of the mounting seat 11 is provided with an opening 117 communicating with the guide groove structure 111, a top surface of the mounting seat 11 is provided with a sliding hole 115, and the sliding hole 115 is communicated with the opening 117 so that the mounting seat 11 can slide relative to a leg 2; the first limiting member 12 is disposed in the guide slot structure 111, the first limiting member 12 includes a first limiting portion 124 and a second limiting portion 122, and the mounting base 11 is provided with a matching portion 116 corresponding to the first limiting portion 124; the second limiting piece 13 is arranged on the mounting seat 11; when the supporting leg 2 is in the locked state, the second limiting portion 122 is pressed on the supporting leg 2, the first limiting portion 124 is matched with the matching portion 116 to limit the supporting leg 2 from relatively moving with the mounting seat 11 along the direction toward the opening 117, and the second limiting member 13 is used to limit the supporting leg 2 from relatively moving with the mounting seat 11 along the direction away from the opening 117.

In this embodiment, the mounting base 11 includes a first side plate 113, a second side plate 114 and a connecting plate 112, the first side plate 113 and the second side plate 114 are disposed at an interval, two ends of the connecting plate 112 are connected to the first side plate 113 and the second side plate 114, the first side plate 113, the second side plate 114 and the connecting plate 112 enclose a guide slot structure 111, an opening 117 is formed at one end of the first side plate 113, the second side plate 114 and one end of the connecting plate 112, meanwhile, a sliding hole 115 communicated with the guide slot structure 111 is disposed on the connecting plate 112, one end of the sliding hole 115 is communicated with the opening 117, and the other end of the sliding hole 115 is a closed end.

With this arrangement, the leg 2 extends into the guide groove structure 111 under the action of the opening 117 and the sliding hole 115, and is limited in the length direction of the leg 2 by the connecting plate 112, so that the leg 2 cannot be separated from the leg fixing device 1 along the depth direction (Z-axis direction) of the guide groove structure 111, and can be separated from the leg fixing device 1 only along the length direction (Y-axis direction) of the guide groove.

In this embodiment, the mounting seat 11 is covered on the base 14, that is, the first side plate 113 and the second side plate 114 are disposed on the base 15, and the connecting plate 112 and the base 15 are respectively located at two opposite ends of the first side plate 113 and the second side plate 114. Meanwhile, the base 15 is provided at a central position thereof with a ball socket, which is located between the first side plate 113 and the second side plate 114, and which is engaged with an end of the leg 2 extending into the guide groove structure 111 (described in detail below). So set up, base 15 has increased the area of contact of landing leg fixing device 1 with the holding surface (ground, platform of standing etc.), the stable support of the landing leg 2 of being convenient for.

After the supporting leg fixing device 1 of the present embodiment is adopted, the installation base 11 and the base 14 are conveniently configured to cooperate with the supporting leg 2, the first limiting member 12 and the second limiting member 13 are used for fixing the supporting leg 2, when the supporting leg 2 is in a locked state, the second limiting portion 122 of the first limiting member 12 is pressed on the supporting leg 2, the first limiting portion 124 of the first limiting member 12 cooperates with the cooperating portion 116 of the installation base 11, and is used for limiting the supporting leg 2 to generate relative displacement with the installation base 11 along a direction toward the opening 117 of the installation base 11, and the second limiting member 13 is used for limiting the supporting leg 2 to generate relative displacement with the installation base 11 along a direction away from the opening 117. Compared with the prior art, the first limiting part 12 does not need to be provided with additional components, so that the installation efficiency is improved, the landing leg fixing device 1 can be effectively prevented from being separated from the landing leg 2, and the loss probability of the landing leg fixing device 1 is reduced. Meanwhile, after the supporting leg fixing device 1 is matched with the supporting leg 2, the first limiting part 12 is limited in the guide groove structure 111, abnormal sound cannot occur between the first limiting part and the mounting seat 11, and compared with a mode of fixing by adopting a plurality of pin shafts 13, noise is reduced.

In this embodiment, the first limiting member 12 further includes a connecting portion 121, the connecting portion 121 is respectively connected to the first limiting portion 124 and the second limiting portion 122, the connecting portion 121 has a contracted state, and the connecting portion 121 is suitable for enabling the first limiting portion 124 to extend into the guide slot structure 111 in the contracted state.

Specifically, the connecting portion 121 has elasticity, and when the connecting portion 121 is in a natural extension state (unstressed), the sum of the width of the connecting portion 121 in the X-axis direction and the width of the first stopper portion 124 in the X-axis direction is greater than the width of the guide groove structure 111 in the X-axis direction, that is, the connecting portion 121 cannot extend into the guide groove structure 111 in the natural extension state. When the connecting portion 121 is in a contracted state (under a force), the sum of the width of the connecting portion 121 in the X-axis direction and the width of the first limiting portion 124 in the X-axis direction is less than or equal to the width of the guide groove structure 111 in the X-axis direction, that is, the connecting portion 121 can urge the first limiting portion 124 to extend into the guide groove structure 111 in the contracted state, when the first limiting portion 124 moves to the position of the mating portion 116, the limitation on the connecting portion 121 is removed, and the connecting portion 121 is restored to mate the first limiting portion 124 with the mating portion 116, at this time, the connecting portion 121 can restore a natural extended state, and also can have a certain amount of compression, preferably, after the limitation of the connecting portion 121 is removed, the connecting portion 121 restores the natural extended state.

So set up, because first spacing portion 124 and cooperation portion 116 are installed at the inside cooperation of guide slot structure 111, when landing leg fixing device 1 used, it was difficult for receiving external force, first spacing portion 124 and cooperation portion 116 can not separate easily, therefore, under the effect of connecting portion 121, first locating part 12 is difficult for breaking away from guide slot structure 111, can realize the good spacing to stabilizer blade 2, avoid stabilizer blade 2 and landing leg fixing device 1 to separate, thereby reduce the probability that landing leg fixing device 1 lost.

As shown in fig. 5, the connecting portion 121 includes a first elastic member 1211 and a second elastic member 1212, the first elastic member 1211 and the second elastic member 1212 are adapted to move toward each other to protrude into the guide groove structure 111; the first elastic element 1211 and/or the second elastic element 1212 are provided with a first position-limiting portion 124.

In this embodiment, the first elastic element 1211 and the second elastic element 1212 are made of elastic material, and both can be elastically deformed under a force. In one embodiment, the first elastic member 1211 and the second elastic member 1212 are spaced apart from each other in the XY plane at a distance of 1cm to 2cm, so that when the first elastic member 1211 and the second elastic member 1212 are subjected to a force, the first elastic member 1211 and the second elastic member 1212 move toward each other, the distance between the first elastic member 1211 and the second elastic member 1212 decreases, and when the first elastic member 1211 and the second elastic member 1212 are contracted to a proper position, the sum of the width of the connecting portion 121 in the X-axis direction and the width of the first stopper portion 124 in the X-axis direction is less than or equal to the width of the guide groove structure 111, so that the first stopper 12 can extend into the guide groove structure 111.

With such an arrangement, under the action of the first elastic element 1211 and the second elastic element 1212, the first limiting portion 124 can extend into the guide groove structure 111 to be matched with the matching portion 116.

In this embodiment, the first limiting portion 124 is a clamping block structure, and the matching portion 116 is a clamping groove structure matched with the clamping block structure, or the first limiting portion 124 is a clamping groove structure, and the matching portion 116 is a clamping block structure matched with the clamping groove structure; the clamping block structure is suitable for being clamped in the clamping groove structure.

In one embodiment, the first elastic element 1211 and the second elastic element 1212 are both provided with the first limiting portion 124, as shown in fig. 5, along the X-axis direction, one end surface of the first elastic element 1211 and the end surface of the second elastic element 1212 facing away from each other are provided with a locking structure, and two opposite side walls of the guide groove structure 111 are provided with locking structures. The first elastic member 1211 and the second elastic member 1212 are engaged with the inner wall of the guide groove structure 111 through the engaging structure and the engaging groove structure.

So set up, connecting portion 121 and mount pad 11 pass through fixture block structure and draw-in groove structure joint together, not only simple structure, the installation of being convenient for, firm in connection moreover. Meanwhile, when the inner wall of the guide groove structure 111 is provided with a groove structure, the groove structure is a through groove, which penetrates through the mounting seat 11, thereby. Whether the fixture block structure and the clamping groove structure are matched in place or not is conveniently distinguished from the outer side of the mounting seat 11, and the mounting efficiency is improved.

In other embodiments, the connecting portion 121 is a whole plate structure, which has elasticity, and when a force is applied to the connecting portion 121, the connecting portion 121 bends, so as to reduce the width of the connecting portion in the X-axis direction, so that the first position-limiting portion 124 extends into the guide groove structure 111.

As shown in fig. 5, the connecting portion 121 further includes a force application structure 123, the force application structure 123 is disposed on each of the first elastic member 1211 and the second elastic member 1212, and the force application structure 123 is configured to enable the first elastic member 1211 and the second elastic member 1212 to move towards each other in a stressed state.

In this embodiment, the force application structure 123 is a groove structure disposed on the first elastic member 1211 and the second elastic member 1212, and the shape of the groove structure may be square or circular, according to practical requirements, and during operation, an external force needs to be applied to the first elastic member and the second elastic member by a removal tool (e.g., a circlip pliers) in cooperation with the groove structure.

In other embodiments, the force application structure 123 is a pillar structure disposed on the first elastic element 1211 and the second elastic element 1212, and the cross section of the pillar structure may be square or circular, according to practical requirements, and when in operation, it is necessary to apply an external force to the first elastic element 1211 and the second elastic element 1212 by a removal tool (e.g., a nipper pliers) in cooperation with the pillar.

With such an arrangement, after the first limiting member 12 is located in the guide groove structure 111, it needs a special disassembling tool to disassemble, so as to achieve the anti-theft effect.

As shown in fig. 1 and 5, the second limiting portion 122 is obliquely disposed in the guide groove structure 111, the oblique direction of the second limiting portion 122 is away from the opening 117, and the second limiting portion 122 is located on the moving path of the leg.

In this embodiment, the second limiting portion 122 is obliquely disposed in the guide groove structure 111, and the angle thereof is not particularly limited, and can play a role of limiting the leg fixing device 1 to be separated from the guide groove structure 111, for example, 90 degrees, 120 degrees, and the like. The second position-limiting portion 122 is away from the opening 117 in the inclined direction, and the second position-limiting portion 122 is located on the moving path of the leg, that is, the distance between the lower end of the second position-limiting portion 122 and the opening 117 is smaller than the distance between the higher end of the second position-limiting portion 122 and the opening 117, that is, the lower end of the second position-limiting portion 122 is closer to the opening 117 than the higher end of the second position-limiting portion 122.

With this arrangement, due to the existence of the second limiting portion 122, when the leg fixing device 1 moves toward the opening 117, the second limiting portion 122 is located on the moving path of the leg 2, so as to limit the leg 2 to move continuously, and the leg fixing device 1 can be effectively prevented from being separated from the guide groove structure 111.

In this embodiment, the second position-limiting portion 122 is elastically connected to the connecting portion 121, the second position-limiting portion 122 is adapted to move relative to the connecting portion 121 in a state where the leg 2 applies a downward force to the second position-limiting portion 122, and the second position-limiting portion 122 is further adapted to abut against the top wall of the guide groove structure 111 in a state where the leg 2 applies an upward force to the second position-limiting portion 122.

Specifically, the second position-limiting portion 122 is elastically connected to the connecting portion 121, so that the elastic portion can be elastically deformed relative to the connecting portion 121, and the second position-limiting portion 122 can move relative to the connecting portion 121 in a stressed state.

With such an arrangement, after the first limiting member 12 is installed on the guide groove structure 111, and the leg 2 extends into the guide groove structure 111 through the sliding hole 115 and the opening 117, the second limiting portion 122 is pressed to move downward, and the leg 2 can cross the second limiting portion 122 and continue to move along the extending direction of the guide groove structure 111. Therefore, the first limiting member 12 can be installed and fixed before the support leg 2 slides into the guide groove structure 111, or can be installed and fixed after the support leg 2 slides into the guide groove structure 111, so that a specific installation sequence is not required, and the assembly and disassembly are more convenient. Meanwhile, when the leg 2 moves towards the first limiting member 12, the upper wall of the guide groove structure 111 with the higher position of the first limiting member 12 contacts, so as to limit the second limiting portion 122 to move continuously, thereby playing a role in limiting the leg 2 to move towards the opening 117.

As shown in fig. 1 and 6, the second limiting member 13 includes a pin 131 and a fastener 132, the pin 131 is disposed on the mounting seat 11, a portion of the pin 131 is located in the guide slot structure 111, and the pin 131 is adapted to be limited on the mounting seat 11 by the fastener 132.

In this embodiment, the fastener 132 is a spring pin. The pin 131 is disposed on the mounting base 11, and a portion of the pin 131 is located in the guide slot structure 111 and spaced from the first limiting member 12, and the pin 131 is adapted to be limited on the mounting base 11 by a fastening member 132.

So set up, round pin axle 131 is spacing behind mount pad 11 through fastener 132, and it uses with the cooperation of first locating part 12, and it can realize landing leg 2 stable spacing, avoids landing leg 2 to rock.

As shown in fig. 6, the pin 131 includes a first shaft 13111 and a second shaft 1312, the first shaft 13111 and the second shaft 1312 are disposed at an angle, the mounting seat 11 is provided with a pin shaft hole communicated with the guide groove structure 111, the second shaft 1312 is inserted into the mounting seat 11 through the pin shaft hole, and one end of the second shaft 1312 passing through the mounting seat 11 is connected to the fastening member 132.

In this embodiment, the first shaft 13111 and the second shaft 1312 are disposed at an angle, and the angle between the first shaft 13111 and the second shaft 1312 is not limited, and may be 60 degrees, 90 degrees, or the like. The mounting seat 11 is provided with a pin shaft hole communicated with the guide groove structure 111, wherein the size of the pin shaft hole is matched with the size of the second shaft body 1312, the second shaft body 1312 is arranged on the mounting seat 11 through the pin shaft hole, and one end of the second shaft body 1312 penetrating through the mounting seat 11 is connected with the fastener 132, specifically, one end of the second shaft body 1312 penetrating through the mounting seat 11 is provided with a penetrating jack structure, and a spring pin is arranged in the jack structure.

With this arrangement, the first shaft 1311 and the second shaft 1312 are bent, which reduces the number of spring pins compared to the straight rod structure, and only needs the second shaft 1312 to pass through one end of the mounting base 11.

Another embodiment of the present invention is to provide a leg assembly, as shown in fig. 7 and 8, comprising a leg 2 and a leg fixing device 1 as described above, wherein the leg 2 is connected with the leg fixing device 1.

In this embodiment, the bottom of the supporting leg 2 is provided with an oil cylinder, and the supporting leg fixing device 1 is clamped at the ball head of the oil cylinder through the guide groove structure 111. In the installation process, when the first limiting part 12 is displaced to be in contact with the oil rod ball head, because the second limiting part 122 of the first limiting part 12 is stressed to move downwards, the supporting leg fixing device 1 can be smoothly assembled on the oil rod ball head, after the first limiting part 12 crosses the oil rod ball head, the second limiting part 122 of the first limiting part 12 is restored to form the limitation on the oil rod ball head, finally, the second limiting part 13 is arranged on the mounting base 11 to form the limitation on the oil rod ball head, and the assembly of the supporting leg fixing device 1 is completed.

A further embodiment of the invention is directed to a work machine comprising a leg fixing 1 as described above, and/or a leg assembly as described above.

In this embodiment, the engineering machine is a crane, an aerial work vehicle, or the like. The following description will be made with reference to a crane. When the crane is in hoisting operation, as shown in fig. 5, the oil rod ball is located at the ball socket center position of the leg fixing device 1, the pin shaft 13 and the first limiting member 12 limit the leg plate to slide, incline and fall off, the larger the force of the mounting base 11 contacting and pressing the first limiting member 12 is, the larger the force of the first limiting member 12 clamped on the mounting base 11 is, the tighter the first limiting member 12 is, and the safer the locking mechanism is. When the crane runs on a highway, as shown in fig. 6, the spring pin at the end of the pin shaft 13 is removed, the first shaft body 1311 of the pin shaft 13 is held to draw out the pin shaft 13 from the mounting seat 11, the supporting leg fixing device 1 is slid until the ball head of the oil rod is positioned at the tail part of the supporting leg disc, the pin shaft 13 is assembled and is clamped by the spring pin, and the supporting leg fixing device 1 is in a retraction state relative to the supporting leg 2. The limiting pin shaft 13 is convenient to disassemble and assemble, and the supporting leg fixing device 1 can be conveniently folded and unfolded by an operator at any time. Even if the pin shaft 13 is loosened and falls off during the running of the crane, the oil rod ball slides to the first limiting part 12, and due to the clamping limiting effect of the first limiting part 12, the landing leg fixing device 1 is ensured not to fall off from the oil cylinder of the landing leg 2, and the problems of foot rest loss and pedestrian traffic safety are avoided.

Although the present disclosure has been described above, the scope of the present disclosure is not limited thereto. Various changes and modifications may be effected therein by one of ordinary skill in the pertinent art without departing from the spirit and scope of the present disclosure, and these changes and modifications are intended to be within the scope of the present disclosure.