阅读说明：本技术 一种支腿锁止装置、支腿组件及工程机械 (Landing leg locking device, landing leg assembly and engineering machinery ) 是由 刘建培 沈川 刘兴龙 于 2021-07-29 设计创作，主要内容包括：本发明提供了一种支腿锁止装置、支腿组件及工程机械,该支腿锁装置包括支撑座和限位组件,所述支撑座适于与车架连接；所述限位组件设置于所述支撑座上,所述限位组件包括第一限位件、传动组件和第二限位件,所述第二限位件通过所述传动组件与所述第一限位件连接,当所述支腿处于解锁状态时,所述第二限位件与所述支撑座呈间隙设置；当所述支腿处于锁止状态时,所述支腿的垂直油缸带动所述第二限位件向下运动,所述第一限位件在所述传动组件的带动下运动至锁止位置,所述第一限位件与所述第二限位件在竖向上形成夹持空间,以用于夹持所述垂直油缸的伸缩端。本发明能够限制支腿竖向上的位移,从而降低安全隐患发生的概率。(The invention provides a supporting leg locking device, a supporting leg assembly and engineering machinery, wherein the supporting leg locking device comprises a supporting seat and a limiting assembly, and the supporting seat is suitable for being connected with a frame; the limiting assembly is arranged on the supporting seat and comprises a first limiting piece, a transmission assembly and a second limiting piece, the second limiting piece is connected with the first limiting piece through the transmission assembly, and when the supporting leg is in an unlocking state, the second limiting piece and the supporting seat are arranged in a clearance mode; when the landing leg is in the locking state, the perpendicular hydro-cylinder of landing leg drives second locating part downstream, first locating part is in drive assembly's drive moves to the locking position down, first locating part with the second locating part vertically forms the centre gripping space, in order to be used for the centre gripping the flexible end of perpendicular hydro-cylinder. The invention can limit the vertical displacement of the supporting leg, thereby reducing the probability of potential safety hazard.)

1. A leg locking device, comprising: a support base adapted to be connected to a vehicle frame;

the limiting assembly is arranged on the supporting seat and comprises a first limiting piece, a transmission assembly and a second limiting piece, the second limiting piece is connected with the first limiting piece through the transmission assembly, and when the supporting leg is in an unlocking state, the second limiting piece and the supporting seat are arranged in a clearance mode;

when the landing leg is in the locking state, the perpendicular hydro-cylinder of landing leg drives second locating part downstream, first locating part is in drive assembly's drive moves to the locking position down, first locating part with the second locating part vertically forms the centre gripping space, in order to be used for the centre gripping the flexible end of perpendicular hydro-cylinder.

2. The leg locking device according to claim 1, wherein the supporting base comprises a first body and a second body, the first body is adapted to be connected to the frame, the second body is disposed on the first body, and the first limiting member, the transmission assembly and the second limiting member are disposed on the second body.

3. The leg locking device according to claim 2, further comprising a first support rod and a second support rod, wherein the first support rod and the second support rod are disposed on the second body, the second support rod is rotatably connected to the first limiting member, the transmission assembly includes a first connecting rod and a second connecting rod, the first connecting rod is rotatably connected to the first support rod, and the first connecting rod, the second connecting rod and the first limiting member are sequentially rotatably connected.

4. The leg locking device according to claim 3, further comprising a limiting seat, wherein the limiting seat is disposed on the second body, the limiting seat is provided with a fixing groove matched with the cylinder ball head of the vertical cylinder, and the second limiting member is adapted to be located in the fixing groove.

5. The leg locking device according to claim 4, wherein the circumferential side wall of the limiting seat is provided with an inlet, the inner wall of the fixing groove is provided with a placing groove, the inlet is communicated with the placing groove, the first connecting rod is suitable for passing through the inlet and the placing groove to be connected with the second limiting member, and the second limiting member is suitable for being received in the placing groove when the cylinder ball head is in contact with the inner wall of the fixing groove.

6. The leg locking device according to claim 3, wherein the first limiting member comprises a limiting plate, one end of the limiting plate is rotatably connected to the second support rod and the second connecting rod, the other end of the limiting plate is provided with a U-shaped opening to avoid the piston rod of the vertical oil cylinder on the rotating path of the limiting plate, and the limiting plate is suitable for being pressed on the ball head of the oil cylinder.

7. The leg locking device according to claim 6, further comprising a locking pin seat and a locking member, wherein the locking pin seat is disposed on the first body or the second body, the locking pin seat is provided with a first hole structure, the limiting plate is provided with a second hole structure, and the locking member is adapted to be inserted into the first hole structure and the second hole structure to connect the locking pin seat and the limiting plate.

8. The leg locking device according to any one of claims 1 to 7, further comprising an elastic member, wherein both ends of the elastic member are connected to the support base and the first retaining member, respectively.

9. A leg assembly comprising a leg comprising a vertical cylinder and a leg lock as claimed in any one of claims 1 to 8 for gripping a cylinder bulb of the vertical cylinder.

10. A working machine comprising a leg locking arrangement according to any of claims 1-8 and/or a leg assembly according to claim 9.

Technical Field

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

Background

At present, when an engineering machine (such as a crane) is excited by the impact load of a bumpy road surface during running, a frame and a swing supporting leg are loaded badly. Under the general condition, swing landing leg direction of rotation's spacing is realized through swing hydro-cylinder and bolt, and nevertheless swing landing leg is realized through the shearing force that the rotation axis received of rotatory end in vertical spacing, because swing landing leg's perpendicular hydro-cylinder end does not have vertical spacing, whole swing landing leg forms the cantilever beam structure, and it can increase rotation axis, frame and landing leg greatly and receive the risk of damage, has brought the potential safety hazard.

Disclosure of Invention

The problem solved by the invention is how to limit the vertical displacement of the supporting leg so as to reduce the potential safety hazard.

To solve the above problems, the present invention provides a leg locking device, including: a support base adapted to be connected to a vehicle frame;

the limiting assembly is arranged on the supporting seat and comprises a first limiting piece, a transmission assembly and a second limiting piece, the second limiting piece is connected with the first limiting piece through the transmission assembly, and when the supporting leg is in an unlocking state, the second limiting piece and the supporting seat are arranged in a clearance mode;

when the landing leg is in the locking state, the perpendicular hydro-cylinder of landing leg drives second locating part downstream, first locating part is in drive assembly's drive moves to the locking position down, first locating part with the second locating part vertically forms the centre gripping space, in order to be used for the centre gripping the flexible end of perpendicular hydro-cylinder.

Optionally, the supporting seat includes a first body and a second body, the first body is adapted to be connected to the frame, the second body is disposed on the first body, and the first limiting member, the transmission assembly, and the second limiting member are disposed on the second body.

Optionally, the portable terminal further comprises a first supporting rod and a second supporting rod, the first supporting rod and the second supporting rod are arranged on the second body, the second supporting rod is rotatably connected with the first limiting part, the transmission assembly comprises a first connecting rod and a second connecting rod, the first connecting rod is rotatably connected with the first supporting rod, and the first connecting rod, the second connecting rod and the first limiting part are sequentially rotatably connected.

Optionally, the oil cylinder further comprises a limiting seat, the limiting seat is arranged on the second body, a fixing groove matched with the oil cylinder ball head of the vertical oil cylinder is formed in the limiting seat, and the second limiting part is suitable for being located in the fixing groove.

Optionally, a circumferential side wall of the limiting seat is provided with an inlet, an inner wall of the fixing groove is provided with a placing groove, the inlet is communicated with the placing groove, the first connecting rod is suitable for penetrating through the inlet and the placing groove to be connected with the second limiting part, and the second limiting part is suitable for being accommodated in the placing groove when the oil cylinder ball head is in contact with the inner wall of the fixing groove.

Optionally, the first limiting member includes a limiting plate, one end of the limiting plate is rotatably connected to the second supporting rod and the second connecting rod, the other end of the limiting plate is provided with a U-shaped opening to avoid the piston rod of the vertical oil cylinder on the rotating path of the limiting plate, and the limiting plate is suitable for being pressed on the ball head of the oil cylinder.

Optionally, still include lockpin boss and retaining member, the lockpin boss set up in first body or on the second body, the lockpin boss is equipped with first pore structure, the limiting plate is equipped with second pore structure, the retaining member is suitable for wearing to locate first pore structure with second pore structure is in order to connect the lockpin boss with the limiting plate.

Optionally, the support device further comprises an elastic member, and two ends of the elastic member are respectively connected with the support seat and the first limiting member.

Another object of the present invention is to provide a leg assembly, which includes a leg and the leg locking device as described above, wherein the leg includes a vertical cylinder, and the leg locking device is used for clamping a cylinder ball of the vertical cylinder.

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

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

the supporting seat is used for connecting a frame, the limiting assembly is arranged on the supporting seat, and the second limiting piece is connected with the first limiting piece through the transmission assembly; when the landing leg is in the locking state, the perpendicular hydro-cylinder of landing leg drives second locating part downstream, and first locating part moves to the locking position under drive assembly's drive, and first locating part and second locating part form the centre gripping space in vertical for the flexible end of centre gripping perpendicular hydro-cylinder. Compare in current structure, it not only can restrict the vertical ascending displacement of landing leg to reduce the probability that the potential safety hazard takes place, moreover, it can also realize the position change of first locating part according to the action of perpendicular hydro-cylinder, can realize spacingly after first locating part is fixed, does not need too much installation procedure.

Drawings

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

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

FIG. 3 is an assembly view of the spacing seat and the second body at a viewing angle;

FIG. 4 is a schematic connection diagram illustrating an embodiment of a first link and a second limiting member according to the present invention;

FIG. 5 is a schematic structural diagram of an embodiment of a vertical cylinder according to the present invention;

FIG. 6 is a schematic view of the assembly of the leg lock and vertical cylinder of the present invention;

fig. 7 is a schematic structural diagram of an embodiment of the construction machine according to the present invention.

Description of reference numerals:

1. a leg locking device; 11. a supporting seat; 111. a first body; 1111. a horizontal segment; 1112. a vertical section; 112. a second body; 12. a limiting component; 121. a first limit piece; 1211. a U-shaped opening; 1212. a second pore structure; 122. a transmission assembly; 1221. a first link; 1222. a second link; 123. a second limiting member; 13. a power member; 14. a lock pin seat; 141. a first pore structure; 15. a locking member; 16. a limiting seat; 161. fixing grooves; 162. an inlet; 163. a placement groove; 17. a first support bar; 18. a second support bar; 2. a frame; 3. a support leg; 31. a vertical oil cylinder; 311. an oil cylinder ball head; 312. a piston rod.

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.

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 right side and the reverse direction of the X-axis represents the left side; the Y-axis in the drawings is represented as a front-rear position, and a forward direction of the Y-axis represents a rear side and a reverse direction of the Y-axis represents a front 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.

In the description of the present invention, it should be noted that terms such as "upper", "lower", "front", "rear", and the like in the embodiments indicate orientation words, which are used for simplifying the description of positional relationships based on the drawings of the specification, and do not represent that elements, devices, and the like which are referred to must operate according to specific orientations and defined operations and methods, configurations in the specification, and such orientation terms do not constitute limitations of the present invention.

As shown in fig. 1 and 2, an embodiment of the present invention provides a leg locking device 1, including a supporting seat 11 and a limiting assembly 12, where the supporting seat 11 is adapted to be connected to a frame 2; the limiting assembly 12 is disposed on the supporting seat 11, the limiting assembly 12 includes a first limiting member 121, a transmission assembly 122 and a second limiting member 123, the second limiting member 123 is connected to the first limiting member 121 through the transmission assembly 122, and when the supporting leg 3 is in an unlocking state, the second limiting member 123 and the supporting seat 11 are disposed in a gap; when the supporting leg 3 is in a locked state, the vertical oil cylinder of the supporting leg 3 drives the second limiting member 123 to move downward, the first limiting member 121 is driven by the transmission assembly 122 to move to a locked position, and the first limiting member 121 and the second limiting member 123 vertically form a clamping space for clamping the telescopic end of the vertical oil cylinder 31.

As shown in fig. 1, the supporting seat 11 includes a first body 111 and a second body 112, the first body 111 is suitable for being connected to the frame 2, the second body 112 is disposed on the first body 111, and the first limiting member 121, the transmission assembly 122 and the second limiting member 123 are disposed on the second body 112. The first body 111 has certain strength and rigidity, and is L-like as a whole, and includes a horizontal section 1111 and a vertical section 1112, wherein the horizontal section 1111 of the first body 111 is used for mounting the second body 112. The vertical section 1112 of the first body 111 is used for connecting the frame 2, specifically, the vertical section 1112 of the first body 111 is provided with a flange, and similarly, the frame 2 is provided with a mounting position matched with the flange, and the flange is locked with the mounting position of the frame 2 through bolts. This secures the leg lock 1 to the vehicle frame 2.

In this embodiment, the second body 124 is detachably disposed on the horizontal section 1111 of the first body 111, specifically, a threaded hole is disposed on the horizontal section 1111 of the first body 111, the second body 124 is disposed with a through hole extending along the thickness direction (Z axis), and after the through hole of the second body 124 is aligned with the threaded hole of the horizontal section 1111 of the first body 111, the through hole and the threaded hole are disposed through by a bolt to connect the first body 111 and the second body 124. The first limiting member 121, the transmission assembly 122 and the second limiting member 123 are located on the upper side of the second body 124, and the first limiting member 121, the transmission assembly 122 and the second limiting member 123 are disposed on the second body 124. So set up, be convenient for whole spacing subassembly 12 equipment after accomplish install on first body 111, the modular structure is convenient for install and change.

In other embodiments, the first limiting member 121, the transmission assembly 122 and the second limiting member 123 can also be directly disposed on the first body 111.

In this embodiment, after the supporting leg locking device 1 of this embodiment is adopted, the supporting seat 11 is used for connecting the frame 2, the limiting assembly 12 is disposed on the supporting seat 11, and since the second limiting member 123 is connected with the first limiting member 121 through the transmission assembly 122, when the supporting leg 3 is in the unlocking state, the second limiting member 123 and the supporting seat 11 are disposed in a gap; when the supporting leg 3 is in a locked state, the vertical oil cylinder 31 of the supporting leg 3 drives the second limiting member 123 to move downward, the first limiting member 121 is driven by the transmission assembly 122 to move to a locked position, and the first limiting member 121 and the second limiting member 123 vertically form a clamping space for clamping the telescopic end of the vertical oil cylinder 31. Compared with the existing structure, the vertical displacement of the supporting legs 3 can be limited, so that the probability of potential safety hazards is reduced; in addition, the position of the first limiting member 121 can be changed according to the action of the vertical oil cylinder 31, and the first limiting member 121 can be limited after being fixed, so that excessive installation steps are not needed.

As shown in fig. 2 and 3, the present invention further includes a limiting seat 16, the limiting seat 16 is disposed on the second body 112, the limiting seat 16 is provided with a fixing groove 161 that is matched with the cylinder ball 311 of the vertical cylinder 31, and the second limiting member 123 is adapted to be located in the fixing groove 161.

In this embodiment, the shape of the limiting seat 16 is not limited, and it may be square or circular, according to specific requirements, wherein the limiting seat 16 is disposed on the second body 112, and the two may be welded, bonded, or bolted. The top surface of the stopper base 16 is provided with a fixing groove 161, and the inner wall shape of the fixing groove 161 is matched with the cylinder ball 311 of the supporting leg 3, for example, the cylinder ball 311 is generally spherical, so the fixing groove 161 is entirely ball-and-socket shaped.

With such an arrangement, when the vertical cylinder 31 of the leg 3 extends downward, a part of the cylinder ball 311 moves into the fixing groove 161 and fits with the inner wall of the fixing groove 161, thereby supporting the cylinder ball 311.

Meanwhile, a proximity switch is arranged in the fixing groove 161, so that when the vertical cylinder 31 extends and contracts, the position of the cylinder ball 311 can be monitored through the proximity switch, and the stroke of the vertical cylinder 31 can be controlled.

As shown in fig. 2 and 4, the display device further includes a first supporting rod 17 and a second supporting rod 18, the first supporting rod 17 and the second supporting rod 18 are disposed on the second body 112, the second supporting rod 18 is rotatably connected to the first limiting member 121, the transmission assembly 122 includes a first connecting rod 1221 and a second connecting rod 1222, the first connecting rod 1221 is rotatably connected to the first supporting rod 17, and the first connecting rod 1221, the second connecting rod 1222 and the first limiting member 121 are sequentially rotatably connected.

In this embodiment, the shapes of the first link 1221 and the second link 1222 are not limited, and may be square or circular, the first link 1221 is rotatably disposed on the second body 124, specifically, the top surface of the second body 124 is provided with the first supporting rod 17, the first link 1221 is rotatably disposed on the first supporting rod 17, the first link 1221 and the second link 1221 are rotatably connected by a pin, and a hinge point of the first link 1221 and the first supporting rod 17 is disposed at an 2/3 shaft position of the first link 1221, wherein a length from the hinge point to the second link 1222 is greater than a length from the hinge point to the second limiting member 123. Specifically, the second supporting rod 18 is disposed on the top surface of the second body 124, the first limiting member 121 is rotatably disposed on the second supporting rod 18, and the first limiting member and the second limiting member are rotatably connected through a pin; meanwhile, the height of the first supporting rod 17 is smaller than that of the second supporting rod 18, so that the hinge point of the first connecting rod 1221 and the first supporting rod 17 is lower than the hinge point of the first limiting member 121 and the second supporting rod 1241. With this arrangement, the first limiting member 121 can be moved to a fixed position to lock the first limiting member.

In this embodiment, the circumferential side wall of the limiting seat 16 is provided with an inlet 162, the inner wall of the fixing groove 161 is provided with a placing groove 163, the inlet 162 is communicated with the placing groove 163, the first connecting rod 1221 is adapted to pass through the inlet 162 and the placing groove 163 to be connected with the second limiting member, and the second limiting member 123 is adapted to be received in the placing groove 163 when the cylinder ball 311 of the supporting leg 3 is in contact with the inner wall of the fixing groove 161; wherein, the width of the inlet 162 (i.e. the vertical distance between the two sides of the inlet 162 in the Y-axis direction) is equal to or greater than the width of the first link 1221, i.e. the width of the inlet 162 is M1, the width of the first link 1221 is M2, and M1 is equal to or greater than M2. Meanwhile, the second limiting member 123 is an arc-shaped rod, the radius of which is equal to the radius of the fixing groove 161, that is, the radius of the arc-shaped rod is R1, the radius of the fixing groove 161 is R2, and R1 is R2. So set up, be convenient for the second locating part 123 to accomodate in standing groove 163, avoid forming the interference to hydro-cylinder bulb 311.

In this embodiment, two ends of the second link 1222 are respectively connected to the first link 1221 and the first limiting member 121, that is, one end of the second link 1222 is rotatably connected to one end of the first link 1221 through a pin, and the other end of the second link 1222 is rotatably connected to the first limiting member 121 through a pin. Thus, the first link 1221 drives the first limiting member 121 to move through the second link 1222, several of which form a link mechanism, so that the first limiting member 121 moves to a fixed position.

As shown in fig. 2, the first limiting member 121 includes a limiting plate, one end of the limiting plate is rotatably connected to the second supporting rod 18 and the second connecting rod 1222, the other end of the limiting plate is provided with a U-shaped opening 1211 to avoid the piston rod 312 of the vertical cylinder 31 on the rotation path of the limiting plate, and the limiting plate is adapted to be pressed on the cylinder ball 311.

In this embodiment, the one end of the limiting plate is rotatably connected to the second supporting rod 18 and the second connecting rod 1222, which means that the one end of the limiting plate is rotatably connected to the second supporting rod 18 and the second connecting rod 1222 at different positions, as shown in fig. 1, the left end of the limiting plate is connected to the second body at the lower part, and the left end of the limiting plate is rotatably connected to the second connecting rod 1222 at the upper part.

As shown in fig. 1 and 2, the limiting plates are rotatably connected to the second support rods 18 on the second body 124, specifically, two second support rods 18 are provided, the two second support rods 18 are arranged at intervals, and the limiting plates are disposed between the two second support rods 18 and rotatably connected to the two second support rods 18, that is, the limiting plates and the second support rods 18 are rotatably connected through pins. Limiting plate and second connecting rod 1222 rotate to be connected, specifically, the top surface of limiting plate is equipped with the round pin axle seat, and second connecting rod 1222 passes second connecting rod 1222 and is connected with round pin axle seat rotation, so set up, realizes the rotation of limiting plate.

In this embodiment, the other end of the limiting plate is provided with a U-shaped opening 1211, where the U-shaped opening 1211 does not refer to that the opening can only be U-shaped, and the opening may be U-shaped or U-like, and the opening extends to the edge of the limiting plate, the width of the U-shaped opening 1211 is greater than the diameter of the piston rod 312 of the vertical cylinder 31, and when the limiting plate rotates, the U-shaped opening 1211 can avoid the piston rod 312; the width of the U-shaped opening 1211 is smaller than the diameter of the cylinder ball 311 of the vertical cylinder 31, and when the limiting plate moves to the fixed position, the plate body of the limiting plate near the U-shaped opening 1211 is pressed on the cylinder ball 311, namely, the width of the U-shaped opening 1211 is D, the diameter of the piston rod 312 is D1, the diameter of the cylinder ball 311 is D2, and D2 > D > D1. Meanwhile, the length of the limiting plate is larger than that of the piston cylinder, namely the length of the limiting plate is L1, the length of the piston cylinder is L2, and L1 is larger than L2.

As shown in fig. 6, the leg locking device 1 further includes a locking pin holder 14 and a locking member 15, the locking pin holder 14 is disposed on the first body 111 or the second body 124, the locking pin holder 14 is provided with a first hole structure 141, the limiting plate is provided with a second hole structure 1212, and the locking member 15 is adapted to penetrate through the first hole structure 141 and the second hole structure 1212 to connect the locking pin holder 14 and the limiting plate.

In this embodiment, the latch seat 14 is disposed on the supporting seat 11 or the second body 124, and may be welded, adhered or bolted, and preferably, the latch seat 14 is welded on the second body 124. The lockpin seat 14 is equipped with first pore structure 141, the limiting plate is equipped with second pore structure 1212, retaining member 15 is suitable for wearing to locate first pore structure 141 and second pore structure 1212 in order to connect lockpin seat 14 and limiting plate, specifically, the one end that the limiting plate was equipped with U-shaped opening 1211 is buckled downwards, and is equipped with the through-hole in the part of buckling, 14 eyes thickness directions of lockpin seat are equipped with the through-hole, retaining member 15 is the round pin axle, after the through-hole of limiting plate and lockpin seat 14's through-hole are aimed at, the round pin axle is worn to locate this through-hole and screw hole in order to connect limiting plate and lockpin seat 14.

As shown in fig. 1, the device further includes an elastic element 13, and two ends of the elastic element 13 are respectively connected to the supporting seat 11 and the first limiting element 121.

In this embodiment, the elastic element 13 is a spring, and the vertical section 1112 and the limiting plate of the first body 111 are connected respectively to the both ends of the spring, specifically, the vertical section 1112 and the limiting plate of the first body 111 are provided with a support with a hanging hole, and the both ends of the spring are hung respectively in the hanging holes on the limiting plate and the supporting seat 11.

As shown in fig. 7, a leg assembly according to another embodiment of the present invention includes a leg 3 and a leg locking device 1 as described above, the leg 3 includes a vertical cylinder 31, and the leg locking device 1 is used for clamping a cylinder ball 311 of the vertical cylinder 31.

After the supporting leg assembly of the embodiment is adopted, as shown in fig. 5 and 6, when the supporting leg 3 does not need to work, and the vertical oil cylinder 31 does not extend downwards, the ball head of the vertical oil cylinder 31 is not in contact with the first connecting rod 1221 at this time, and the limiting plate is away from the fixed position under the action of the spring. When perpendicular hydro-cylinder 31 stretches out down, after hydro-cylinder bulb 311 and first connecting rod 1221 contact, when hydro-cylinder bulb 311 moves towards spacing seat, first connecting rod 1221 rotates around first bracing piece 17 in order to drive second connecting rod 1222 and move, and then make the limiting plate rotate around second bracing piece 18, perpendicular hydro-cylinder 31 downward stroke carries on spacingly through proximity switch and spacing ball socket, when hydro-cylinder bulb 311 cooperates with the fixed slot 161 of spacing seat, the limiting plate moves to fixed position, make lockpin seat 14 and limiting plate connect through the round pin axle, at this moment, the limiting plate pressure is located on hydro-cylinder bulb 311, thereby realize vertical spacing. When the supporting leg 3 needs to swing out for work, the pin shaft between the limiting plate and the lock pin seat 14 is pulled out firstly, the limiting plate is slowly pulled back by the spring to be far away from the fixed position along with the upward movement of the vertical oil cylinder 31, and the vertical limiting of the vertical oil cylinder 31 is removed.

A working machine according to another embodiment of the present invention includes the leg lock apparatus 1 as described above, and/or the leg assembly as described above.

In this embodiment, the engineering machine may be a crane, a truck crane, an aerial work vehicle, or the like. As shown in fig. 7, it comprises a frame for mounting the leg lock 1.

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.