CN215663369U - Landing leg structure and engineering machinery - Google Patents

Abstract

The utility model provides a supporting leg structure, which belongs to the technical field of engineering machinery and comprises the following components: a leg body; the supporting leg seat is arranged at the lower end of the supporting leg body; the backing plate is rotatably connected with the supporting leg seat and has a folded position and an unfolded position relative to the supporting leg body; a first positioning portion adapted to cooperate with the tie plate when the tie plate is in the stowed position to retain the tie plate in the stowed position; a second positioning portion adapted to cooperate with the tie plate when the tie plate is in the deployed position to retain the tie plate in the deployed position. According to the support leg structure, the base plate can be unfolded and stored by rotating the base plate, the base plate does not need to be detached and installed, the base plate is arranged on the support leg body and can move along with a vehicle, carrying is not needed, time and labor are saved, the construction process is simplified, and the construction efficiency is improved.

Description

Landing leg structure and engineering machinery

Technical Field

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

Background

Construction machines are an important component of the equipment industry. In general, mechanical equipment necessary for comprehensive mechanized construction works required for earth and stone construction works, road surface construction and maintenance, mobile lifting, loading and unloading operations, and various construction works is called as construction machinery. The method is mainly used in the fields of national defense construction engineering, transportation construction, energy industry construction and production, raw material industry construction and production of mines and the like, agriculture, forestry, water conservancy construction, industrial and civil buildings, urban construction, environmental protection and the like. Engineering machinery, such as a pump truck, a crane and the like, generally needs to support the whole vehicle body on the ground by means of supporting legs during construction so as to perform operation, so that the stability of the engineering machinery is enhanced, and the supporting legs need to be folded to be transported in a transition mode after construction.

The engineering machinery is large in size, the gravity required to be supported is also large, and the hydraulic support leg is a widely applied support device. The contact area of the bottom of the supporting leg structure and the ground is small, when the supporting leg structure is used on soft ground, the supporting leg is easily inserted into the soil, so that inconvenience is brought to a user, and when the supporting leg structure is used on floor pavements such as brittle marbles, the pavement is easily crushed. In order to increase the contact area between the bottom surface of the leg structure and the ground, the bottom surface of the leg structure is usually detachably connected with the backing plate in the prior art, when the leg structure is used for supporting, the backing plate is connected to the leg structure, and the backing plate is detached to be stored after the use is completed, so that the leg structure can be used next time. Therefore, this structure needs constructor manual dismantlement and installation, dismantles and transport difficulty, brings bigger work load for constructor for the work progress is loaded down with trivial details, influences the efficiency of construction.

SUMMERY OF THE UTILITY MODEL

Therefore, the utility model aims to solve the technical problem of overcoming the defects that the disassembly and the assembly of the backing plate of the supporting leg structure in the prior art are complicated and the construction efficiency is influenced.

In order to solve the above technical problem, the present invention provides a leg structure, including:

a leg body;

the supporting leg seat is arranged at the lower end of the supporting leg body;

the backing plate is rotatably connected with the supporting leg seat and has a folded position and an unfolded position relative to the supporting leg body;

a first positioning portion adapted to cooperate with the tie plate when the tie plate is in the stowed position to retain the tie plate in the stowed position;

a second positioning portion adapted to cooperate with the tie plate when the tie plate is in the deployed position to retain the tie plate in the deployed position.

The second location portion includes kicking block and lug, the kicking block rotates to be connected the landing leg seat with on one of the backing plate, the lug is located the landing leg seat with on another in the backing plate, work as when the backing plate is in the expansion position, the kicking block orientation the lug swing, so that the kicking block with lug looks butt.

The ejector block is a plurality of, the lug is a plurality of, and is a plurality of ejector block and a plurality of the lug corresponds the setting, second location portion still includes the connecting rod, the connecting rod with a plurality of the ejector block is connected to make a plurality of the ejector block can the synchronous oscillation.

The second positioning part further comprises a first elastic part, the first elastic part is connected between the connecting rod and the supporting leg seat, in the unfolding position, the first elastic part is in a stretching state, one end of the first elastic part, which is connected with the connecting rod, is higher than one end of the first elastic part, which is connected with the supporting leg seat, and the included angle between the first elastic part and the horizontal plane is smaller than or equal to 30 degrees.

The lug sets up on the backing plate and be close to the landing leg seat sets up, the lower part of lug is provided with rotates connecting portion, the backing plate passes through rotate connecting portion with the landing leg seat switching, when the backing plate is in the expansion position, the kicking block with the upper portion butt of lug.

The first positioning part comprises a draw hook and a pull ring, the draw hook is arranged on one of the landing leg body and the backing plate, the pull ring is arranged on the other of the landing leg body and the backing plate, and when the backing plate is in a folded position, the draw hook is correspondingly clamped with the pull ring; or,

the number of the backing plates is even, every two backing plates form a pair, the pair of backing plates are respectively positioned at two opposite sides of the leg seat, and the number of the first positioning parts and the second positioning parts corresponding to the pair of backing plates is at least two; or,

the landing leg body with the landing leg seat passes through the joint spindle nose and connects.

The draw hook rotationally sets up on the landing leg body, first locating part still includes the second elastic component, and when the backing plate is in the folded position, the second elastic component is suitable for to the elastic force of downward wobbling is exerted to the draw hook.

First location portion still includes the barrier part, the drag hook is provided with downwardly extending's spacing convex part, when the backing plate is in the expansion position, the second elastic component is suitable for right downwardly swinging elastic force is applyed to the drag hook just the barrier part is suitable for the restriction the position of drag hook downwardly swinging.

First location portion is provided with a plurality ofly, and is a plurality of first location portion the drag hook sets up along circumference, the backing plate is equipped with a plurality ofly, and is a plurality of the backing plate sets up along circumference interval, every all be provided with on the backing plate the pull ring, it is a plurality of the drag hook is with a plurality of the pull ring corresponds the setting, wherein, second elastic component (8) are connected two relatively drag hook (4) on spacing convex part (6), stop part (7) set up two relatively drag hook (4) between spacing convex part (6).

The utility model also provides engineering machinery comprising the support leg structure.

The technical scheme of the utility model has the following advantages:

1. the utility model provides a supporting leg structure which comprises a supporting leg body, a supporting leg seat and a base plate, wherein the supporting leg seat is arranged at the lower end of the supporting leg body, the base plate is rotatably connected to the supporting leg seat, the base plate is provided with a furled position and an unfolded position relative to the supporting leg body, the base plate is kept at the furled position through the arrangement of a first positioning part, and the base plate is kept at the unfolded position through the arrangement of a second positioning part. The backing plate is rotatably arranged on the leg seat, is unfolded when in use, and is kept unfolded by the second positioning part, and can be rotated to be folded after the use is finished, and the backing plate is kept folded by the first positioning part. Consequently, can realize the expansion and the accomodating of backing plate through rotating the backing plate, need not to dismantle the backing plate and install to, the backing plate setting can be removed along with the vehicle on the landing leg body, need not the transport, and labour saving and time saving simplifies the work progress, improves the efficiency of construction.

2. According to the support leg structure provided by the utility model, the top block and the convex block are respectively arranged on the support leg seat and the base plate, so that when the base plate is in the unfolding position, the top block can swing to be abutted against the convex block, and the position of the base plate is fixed. Consequently, make kicking block and lug butt through rotating the kicking block, can be so that the backing plate is stable be in the expansion position, the upwards swing of backing plate has been avoided in the cooperation setting of kicking block and lug promptly for the backing plate can meet with ground stability.

3. According to the supporting leg structure provided by the utility model, the plurality of jacking blocks and the plurality of lugs are correspondingly arranged, and the jacking blocks are connected through the connecting rods, so that the plurality of jacking blocks can synchronously swing through the connecting rods. The cushion plate can be more stable when in the unfolding position by arranging the plurality of top blocks and the plurality of convex blocks; the movement of the plurality of jacking blocks is easier to control by arranging the connecting rods, and the operation is simple and convenient.

4. According to the support leg structure provided by the utility model, the first elastic piece is connected between the connecting rod and the support leg seat, the elastic force of the first elastic piece can be used for driving the connecting rod to move, so that the top block is driven to rotate, the movement of the top block is faster, the time consumed by unfolding and folding the base plate is shortened, and the construction efficiency is further improved; and when the backing plate is unfolded, the first elastic piece is in a stretching state, and one end connected with the connecting rod is higher than one end connected with the supporting leg seat, so that the stretching force of the first elastic piece can decompose a downward component force, that is, a downward acting force can be applied to the top block, the top block is prevented from moving upwards to be separated from and abutted against the bump, and the unfolding stability of the backing plate is ensured.

5. According to the support leg structure provided by the utility model, the bump is arranged on one side of the base plate close to the support leg seat, the lower part of the bump is arranged as the rotary connecting part, so that the base plate is rotatably connected with the support leg seat, and when the base plate is in the unfolding position, the top block abuts against the upper part of the bump. The rotary connection part of the base plate and the leg base is integrated on the lug, so that the lug can realize the rotary connection effect with the leg base and the effect of matching the ejector block to limit the position of the base plate, and the whole structure of the base plate is simplified.

6. According to the supporting leg structure provided by the utility model, the first positioning part comprises the draw hook and the pull ring, and the draw hook and the pull ring are respectively arranged on the supporting leg body and the backing plate, so that the backing plate can be in a furled position through corresponding clamping of the draw hook and the pull ring. The draw hook and the pull ring which are arranged in a matched mode are used for fixing the position of the backing plate, the structure is simple, and the operation is convenient.

The number of the backing plates is set to be even, every two backing plates form a pair, and the pair of backing plates are respectively arranged on two opposite sides of the supporting leg seat, so that the supporting of the backing plates is more stable.

The landing leg body and the landing leg seat are connected through the joint shaft head, and when the ground is uneven, the landing leg body and the landing leg seat can slide to a certain extent through the joint shaft head, so that the lower surfaces of the landing leg seat and the backing plate are attached to the ground as much as possible.

7. According to the supporting leg structure provided by the utility model, the draw hook is rotatably arranged on the supporting leg body, the second elastic piece is arranged to draw the draw hook, and when the draw hook is matched with the pull ring, the second elastic piece exerts downward swinging elastic force on the draw hook, so that the draw hook is tightly matched with the pull ring.

8. According to the supporting leg structure provided by the utility model, the first positioning part further comprises a blocking part, and the draw hook is provided with the limiting convex part so as to block the draw hook by utilizing the blocking part and the limiting convex part and limit the rotating position of the draw hook.

9. According to the landing leg structure provided by the utility model, the plurality of backing plates are arranged along the circumferential direction of the landing leg body, the plurality of pull rings and the pull hooks are arranged to fix the positions of the backing plates in a furled state, and the second elastic part and the blocking part are arranged between the two opposite limiting convex parts. The contact area of the landing leg body and the ground can be increased by arranging the plurality of base plates, the supporting stability of the landing leg is improved, the rotation and the position of the two drag hooks can be controlled by arranging the second elastic piece and the blocking part, and the structure is simpler.

10. The engineering machinery comprises the supporting leg structure, so that when the engineering machinery is used and supported by the supporting legs, the base plate is opened to be in an unfolded state and is fixed by the second positioning part, the contact area between the supporting leg body and the ground is increased, after the engineering machinery is used, the base plate is rotated to be in a folded state, and the folded position is fixed by the first positioning part. The backing plate can be unfolded and stored by rotating the backing plate, the backing plate does not need to be detached and installed, the backing plate is arranged on the landing leg body, the backing plate can be moved together along with a vehicle, the carrying is not needed, the stable support of the landing leg body is guaranteed, time and labor are saved, the construction process is simplified, and the construction efficiency is improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a schematic illustration of a leg structure provided by an embodiment of the present invention in an expanded state;

FIG. 2 is an exploded view of FIG. 1;

FIG. 3 is a schematic structural view of a leg structure in a collapsed state according to an embodiment of the present invention;

FIG. 4 is a front view of FIG. 3;

FIG. 5 is a top view of FIG. 1;

FIG. 6 is a schematic structural diagram of a backing plate provided in an embodiment of the present invention;

FIG. 7 is a schematic structural diagram of a leg body according to an embodiment of the present invention;

FIG. 8 is a schematic structural diagram of a leg rest according to an embodiment of the present invention;

FIG. 9 is a top view of FIG. 8;

FIG. 10 is a front view of FIG. 8;

FIG. 11 is a left side view of FIG. 8;

FIG. 12 is a schematic view of the retractor of the present invention;

FIG. 13 is a front view of a retaining ring provided in accordance with an embodiment of the present invention;

FIG. 14 is a top view of FIG. 13;

fig. 15 is a partial schematic structural view of a leg structure according to an alternative embodiment of the present invention in a collapsed state.

Description of reference numerals:

1. a leg body; 2. a leg base; 3. a base plate; 4. pulling a hook; 5. a pull ring; 6. a limiting convex part; 7. a blocking portion; 8. a second elastic member; 9. a top block; 10. a bump; 11. a support plate; 12. a connecting rod; 13. a first elastic member; 14. a boss; 15. an annular baffle; 16. a fixing ring; 17. a rotation connecting part; 18. a hook portion; 19. a connecting portion; 20. a strut; 21. a first aperture body; 22. a second aperture body; 23. a spring connecting block; 24. a first reinforcing plate; 25. a second reinforcing plate; 26. a third reinforcing plate.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present 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.

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, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

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.

In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

One embodiment of a leg construction as shown in fig. 1 to 14, comprising: the landing leg base comprises a landing leg body 1, a landing leg base 2 and a backing plate 3. As shown in fig. 1 to 4, the pad 3 is provided with a pair and is respectively disposed on two opposite sides of the leg base 2, and the pad 3 is rotatably connected with the leg base 2. As shown in fig. 1 and 3, the pad plate 3 has an expanded position and a collapsed position with respect to the leg body 1, and the pad plate 3 is held in the collapsed position by providing the first positioning portion and the pad plate 3 is held in the expanded position by providing the second positioning portion.

The backing plate 3 is rotatably arranged on the leg base 2, is unfolded when in use, and is kept unfolded by the second positioning part, and after the use is finished, the backing plate 3 can be rotated to be folded, and is kept folded by the first positioning part. Consequently, can realize the expansion and accomodate of backing plate 3 through rotating backing plate 3, need not to dismantle backing plate 3 and install to, backing plate 3 sets up on landing leg body 1, can remove along with the vehicle together, need not the transport, and labour saving and time saving simplifies the work progress, improves the efficiency of construction.

As shown in fig. 1 to 5, the second positioning portion includes a pair of top blocks 9 rotatably connected to the leg base 2 and a pair of bumps 10 disposed on the pad 3, as shown in fig. 1 and 2, a pair of top blocks 9 is disposed on one side of the leg base 2 connected to the pad 3, correspondingly, a pair of bumps 10 is also disposed on the pad 3, the pair of top blocks 9 is connected through a connecting rod 12, a first elastic member 13 is connected between the connecting rod 12 and the leg base 2, and the first elastic member 13 is in a stretching state, the first elastic member 13 is disposed in a pair and disposed adjacent to the pair of top blocks 9 respectively, in this embodiment, the first elastic member 13 is a spring. As shown in fig. 1 and 3, when the tie plate 3 is in the folded position, the top block 9 is rotated upward, and when the tie plate 3 is in the unfolded position, the top block 9 is rotated downward, so that the top block 9 abuts against the projection 10. When the top block 9 abuts against the bump 10, the end of the first elastic element 13 connected with the connecting rod 12 is higher than the end connected with the leg base 2, and the included angle between the first elastic element 13 and the horizontal plane is not more than 30 degrees.

Of course, the second positioning portion may be other conventional fixing structure, such as a fastener such as a screw to hold the cushion plate 3 in the unfolded position.

By arranging the top piece 9 by rotation on the leg rest 2 and the projection 10 on the underlay sheet 3, the top piece 9 can be swung into abutment with the projection 10 when the underlay sheet 3 is in the unfolded position, in order to fix the position of the underlay sheet 3. Therefore, make kicking block 9 and lug 10 butt through rotating kicking block 9, can make the backing plate 3 stable be in the expansion position, the upwards swing of backing plate 3 has been avoided in the cooperation setting of kicking block 9 and lug 10 promptly for backing plate 3 can meet with ground stability.

As shown in fig. 1 to 4, the first positioning portion includes a fixing ring 16, a drag hook 4 and a pull ring 5, the fixing ring 16 is detachably disposed on the leg body 1, the drag hook 4 is rotatably disposed on the fixing ring 16, and the pull ring 5 is disposed along one side of the backing plate 3 away from the leg base 2. As shown in figures 3 and 4, when the backing plate 3 is in the folded position, the draw hook 4 is correspondingly clamped with the pull ring 5. The draw hook 4 and the draw ring 5 which are arranged in a matching way are used for fixing the position of the backing plate 3, the structure is simple, and the operation is convenient.

Of course, the second positioning portion may be other conventional fixing structures, such as a form of a slot and a latch to hold the cushion plate 3 in the folded position.

As shown in fig. 12, the drag hook 4 is a strip-shaped structure, one end of the drag hook 4 is rotatably connected with the leg base 2, the other end of the drag hook is provided with a hook portion 18, the hook portion 18 is arranged downward, the middle portion of the strip-shaped drag hook 4 extends downward to form a limiting protrusion 6, and the limiting protrusion 6 is a strip-shaped structure. As shown in fig. 13 and 14, the fixing ring 16 is in a semi-ring shape, two ends of the fixing ring 16 extend outwards to form connecting portions 19, through holes are formed in the connecting portions 19, the connecting portions 19 of the two fixing rings 16 are correspondingly connected and fixed at the through holes by using bolts and nuts, and the inner wall of a ring body formed by connecting the two fixing rings 16 is matched with the outer wall of the landing leg body 1. As shown in fig. 14, a strut 20 is connected to the middle of the outer wall of the fixing ring 16, and a stopper 7 is provided at the lower end of the strut 20. As shown in fig. 2, the two opposite draw hooks 4 are rotatably connected with the support rod 20, the blocking portion 7 is disposed between the two opposite limit protrusions 6, the second elastic member 8 is further connected between the two opposite limit protrusions 6, and the second elastic member 8 is a spring.

With the rotatable setting of drag hook 4 on landing leg body 1 to set up second elastic component 8 and draw drag hook 4 and establish, when drag hook 4 and pull ring 5 cooperated, downward swinging elastic force was exerted to the drag hook to second elastic component 8, and then closely cooperated between messenger's drag hook 4 and the pull ring 5. When the draw hook 4 is separated from the pull ring 5, the stop part 7 is used for stopping the draw hook 4 so as to limit the downward rotating position of the draw hook 4; and the rotation and the position of the two drag hooks 4 can be controlled by arranging the second elastic piece 8 and the blocking part 7, and the structure is simpler.

As shown in fig. 1 and 6, the lower end of the projection 10 is provided with a rotation connecting portion 17, as shown in fig. 8 to 11, the upper surface of the leg base 2 is provided with a support plate 11, the support plate 11 is provided with a first hole 21 for rotatably connecting with the top block 9, and a second hole 22 for rotatably connecting with the rotation connecting portion 17, and when the backing plate 3 is in the expanded position, the top block 9 abuts against the upper end of the projection 10.

The rotary joint of the backing plate 3 and the leg base 2 is integrated on the lug 10, so that the rotary joint of the backing plate 3 and the leg base 2 and the rotary joint of the backing plate 3 and the leg base 2 are integrated on the support plate 11 by arranging the lug 10 to realize the rotary connection with the leg base 2 and the action of matching the top block 9 to limit the position of the backing plate 3, and the rotary joint of the top block 9 and the leg base 2 and the rotary joint of the backing plate 3 and the leg base 2 are simplified in the whole structure of the backing plate 3 and the leg base 2.

In the present embodiment, as shown in fig. 6, a first reinforcing plate 24 is disposed on the backing plate 3, and the first reinforcing plate 24 is connected to a surface of the bump 10 away from the top block 9, and a pair of bumps 10 are disposed, and correspondingly, a pair of first reinforcing plates 24 is also disposed, and second reinforcing plates 25 are connected between and on both sides of the pair of first reinforcing plates 24. The strength of the backing plate 3 is improved by the first reinforcing plate 24 and the second reinforcing plate 25, the strength of the lug 10 is enhanced, and the lug 10 is prevented from being damaged after long-term rotation and abutting against the top block 9.

In the present embodiment, as shown in fig. 2 and 7, the leg body 1 and the leg base 2 are connected through a joint shaft head, specifically, the lower end of the leg body 1 is in a hemispherical structure, as shown in fig. 2 and 8, the middle part of the upper surface of the leg base 2 protrudes upwards to form a boss 14, the inside of the boss 14 is in a hollow configuration, the upper end of the boss 14 is detachably connected with an annular baffle 15, the annular baffle 15 and the hollow part of the boss 14 form a containing space of the hemispherical structure, and the hemispherical structure is limited inside the containing space by the annular baffle 15. Therefore, when the ground is uneven, the hemispherical structure can slide in the accommodating space to a certain extent, so that the lower surfaces of the leg rest 2 and the base plate 3 are attached to the ground as much as possible.

As shown in fig. 8, third reinforcing plates 26 are provided on both sides of the pair of brackets 11 and between the bosses 14 to reinforce the strength of the leg rest 2. A spring connecting block 23 is arranged on the third reinforcing plate 26 between the support plate 11 and the boss 14, and the lower end of the spring connecting block 23 is connected with the upper surface of the leg seat 2. One end of the first elastic member 13 is connected to the spring connecting block 23, and the other end is connected to the connecting rod 12.

In the present embodiment, as shown in fig. 1 to 4, the leg body 1 is a hydraulic telescopic rod.

The embodiment also provides a specific implementation mode of the engineering machinery, which comprises the support leg structure. This engineering machine tool is using and when utilizing the landing leg to support, opens backing plate 3 to the expansion state to utilize second location portion to fix, increase the area of contact of landing leg body 1 and ground, after the use is accomplished, rotate backing plate 3 to the state of drawing in, and utilize first location portion to fix the position of drawing in.

When using the landing leg structure that this embodiment provided to support, at first, landing leg body 1 stretches out, and the lower surface and the ground of landing leg seat 2 meet, then, upwards stimulate drag hook 4, make hook portion 18 and the pull ring 5 of drag hook 4 break away from the joint, under the effect of gravity, backing plate 3 rotates towards ground, until meeting with ground, and, under the action of gravity of kicking block 9 and the elasticity of first elastic component 13, kicking block 9 rotates towards backing plate 3, until with lug 10 looks butt, at this moment, backing plate 3 is in the expansion position. After using the completion, at first, pulling connecting rod 12 makes kicking block 9 break away from with the butt of lug 10, then, upwards rotates backing plate 3 for drag hook 4 and pull ring 5 looks joint can make backing plate 3 be in and draw in the position in, and landing leg body 1 shrink at last can be with whole landing leg structure withdrawal.

In summary, the leg structure provided in this embodiment is to rotate the pad plate to be disposed on the leg base, and to be unfolded when in use, and to keep the pad plate unfolded by using the second positioning portion, and after the use is completed, to rotate the pad plate to be folded, and to keep the pad plate folded by using the first positioning portion. Consequently, can realize the expansion and the accomodating of backing plate through rotating the backing plate, need not to dismantle the backing plate and install to, the backing plate setting can be removed along with the vehicle on the landing leg body, need not the transport, and labour saving and time saving simplifies the work progress, improves the efficiency of construction.

Preferably, the construction machine is a pump truck. Of course, other work machines requiring the use of legs for position fixing may also use the above-mentioned structure, such as fire fighting truck, crane, etc.

Alternatively, as shown in fig. 15, four base plates 3 are rotatably connected to the leg rest 2 at intervals in the circumferential direction, the top block 9 is rotatably connected to the base plates 3, and when the base plates 3 are in the deployed position, one end of the top block 9 away from the base plates 3 abuts against the boss 14.

As an alternative embodiment, the leg body 1 may be a swing leg, and of course, the leg body 1 may also be a telescopic leg.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the utility model.

Claims (10)

1. A leg structure, comprising:

a leg body (1);

the supporting leg seat (2) is arranged at the lower end of the supporting leg body (1);

the backing plate (3) is rotatably connected with the supporting leg seat (2), and the backing plate (3) has a furled position and an unfolded position relative to the supporting leg body (1);

a first positioning portion adapted to cooperate with the tie plate (3) when the tie plate (3) is in the stowed position to retain the tie plate (3) in the stowed position;

a second positioning portion adapted to cooperate with the tie plate (3) when the tie plate (3) is in the deployed position to retain the tie plate (3) in the deployed position.

2. The leg structure according to claim 1, wherein the second positioning portion includes a top block (9) and a projection (10), the top block (9) is rotatably connected to one of the leg base (2) and the pad plate (3), the projection (10) is provided on the other of the leg base (2) and the pad plate (3), and when the pad plate (3) is in the deployed position, the top block (9) swings toward the projection (10) to abut the top block (9) against the projection (10).

3. The leg structure according to claim 2, wherein the number of the top blocks (9) is plural, the number of the convex blocks (10) is plural, the plural top blocks (9) and the plural convex blocks (10) are correspondingly arranged, and the second positioning portion further comprises a connecting rod (12), and the connecting rod (12) is connected with the plural top blocks (9) so that the plural top blocks (9) can swing synchronously.

4. The leg structure according to claim 3, wherein the second positioning portion further comprises a first elastic member (13), the first elastic member (13) is connected between the connecting rod (12) and the leg base (2), in the unfolded position, the first elastic member (13) is in a stretched state and one end connected with the connecting rod (12) is higher than one end connected with the leg base (2), and an included angle between the first elastic member (13) and a horizontal plane is less than or equal to 30 degrees.

5. The leg arrangement as claimed in claim 2, characterized in that the projection (10) is arranged on the pad (3) close to the leg base (2), a rotary connection (17) is arranged at the lower part of the projection (10), the pad (3) is in transition with the leg base (2) via the rotary connection (17), and the top block (9) abuts the upper part of the projection (10) when the pad (3) is in the unfolded position.

6. The leg structure according to any one of claims 1-5, characterized in that the first positioning part comprises a draw hook (4) and a pull ring (5), the draw hook (4) is arranged on one of the leg body (1) and the backing plate (3), the pull ring (5) is arranged on the other of the leg body (1) and the backing plate (3), and when the backing plate (3) is in the folded position, the draw hook (4) is correspondingly clamped with the pull ring (5); or,

the number of the backing plates (3) is even, every two backing plates (3) form a pair, the pair of backing plates (3) are respectively positioned at two opposite sides of the leg seat (2), and the number of the first positioning parts and the second positioning parts corresponding to the pair of backing plates (3) is at least two; or,

the supporting leg body (1) is connected with the supporting leg seat (2) through a joint shaft head.

7. The leg structure of claim 6, wherein the draw hook (4) is rotatably arranged on the leg body (1), and the first positioning part further comprises a second elastic member (8), and the second elastic member (8) is adapted to apply a downward swinging elastic force to the draw hook (4) when the backing plate (3) is in the folded position.

8. The leg arrangement as claimed in claim 7, characterized in that the first detent further comprises a stop (7), the draw hook (4) is provided with a downwardly extending stop protrusion (6), the second spring (8) is adapted to exert a downwardly swinging spring force on the draw hook (4) and the stop (7) is adapted to limit the downwardly swinging position of the draw hook (4) when the pad (3) is in the deployed position.

9. The leg structure according to claim 8, wherein the first positioning portion is provided with a plurality of draw hooks (4) arranged along the circumferential direction, the backing plate (3) is provided with a plurality of backing plates (3) arranged along the circumferential direction at intervals, each backing plate (3) is provided with the pull ring (5), the draw hooks (4) and the pull rings (5) are correspondingly arranged, the second elastic member (8) is connected to the limiting convex portions (6) of the two opposite draw hooks (4), and the blocking portion (7) is arranged between the limiting convex portions (6) of the two opposite draw hooks (4).

10. A working machine, characterized in that it comprises a leg construction according to any one of claims 1-9.

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