Outrigger device and construction machinery

Abstract

The present invention discloses a leg device and engineering machinery. The leg device includes a leg mechanism and an unlocking mechanism. The leg mechanism includes a leg assembly and a foot assembly provided on the leg assembly. The leg assembly is provided with an extension locking portion. The unlocking mechanism includes a locking piece and an unlocking drive assembly. The unlocking drive assembly is provided on the telescopic drive end of the foot assembly and is connected to the locking piece. The unlocking drive assembly is used to drive the locking piece to lock the extension locking portion when the telescopic drive end is extended, and to drive the locking piece to unlock the extension locking portion when the telescopic drive end is retracted. The leg assembly does not need to be manually locked and unlocked. The unlocking drive assembly is driven by the telescopic movement of the telescopic drive end of the foot assembly, so that the unlocking drive assembly drives the locking piece to automatically lock and unlock the leg assembly. This omits operating steps, saves operating time, and is convenient and quick to operate.

Description

Technical Field

[0001] The present invention belongs to the technical field of engineering machinery, and in particular relates to an outrigger device and engineering machinery. Background Art

[0002] Currently, the safety latches for the movable legs on mobile cranes are manually inserted and removed. After the movable leg is extended relative to the fixed leg, the operator must manually remove the safety latch from the latch holder and then pass the safety latch through the fixed and movable legs to lock the movable leg and prevent it from moving freely. However, during operation, operators are prone to forgetting to insert the safety latch, which can cause the movable leg to move freely, posing a safety hazard. Furthermore, after the operation is completed, operators are prone to retracting the movable leg without removing the safety latch. The unremoved safety latch can jam the retracted movable leg, causing damage to the fixed and movable legs. Manually inserting and removing the safety latch is also inconvenient. Summary of the Invention

[0003] In view of the above-mentioned defects or shortcomings, the present invention provides a leg device and engineering machinery, aiming to solve the technical problem of the inconvenience of manually inserting and removing the safety pin.

[0004] In order to achieve the above object, the present invention provides a leg support device, which includes:

[0005] The leg mechanism comprises a leg assembly and a foot assembly provided on the leg assembly, wherein the leg assembly is provided with an extension locking portion;

[0006] The unlocking mechanism includes a locking member and an unlocking drive assembly. The unlocking drive assembly is arranged on the telescopic drive end of the leg assembly and is driven and connected to the locking member. The locking member is used to correspond to the extended locking portion when the leg assembly is in a preset extended state. The unlocking drive assembly is used to drive the locking member to lock the extended locking portion when the telescopic drive end performs an extending movement, and to drive the locking member to unlock the extended locking portion when the telescopic drive end performs a retracting movement.

[0007] In an embodiment of the present invention, the leg assembly includes a fixed leg and a movable leg telescopically arranged on the fixed leg. The extension locking portion is configured as two extension locking holes respectively opened on the fixed leg and the movable leg, and the two extension locking holes are vertically connected when the movable leg is in a preset extended state relative to the fixed leg. The locking member is configured as a vertically arranged locking pin. The unlocking drive assembly is used to drive the locking pin to insert into the extension locking hole when the telescopic drive end performs an extension movement, and to drive the locking pin to withdraw from the extension locking hole when the telescopic drive end performs a retraction movement.

[0008] In an embodiment of the present invention, the unlocking drive assembly includes a swing rod and a connecting rod group, the swing rod is swingably arranged on the movable support leg, the locking pin is arranged at the first end of the swing rod, and the second end of the swing rod is hinged to the connecting rod group, and the connecting rod group is arranged on the telescopic drive end of the support leg assembly.

[0009] In an embodiment of the present invention, the connecting rod group includes a first connecting rod and a second connecting rod, the two ends of the first connecting rod are respectively hinged to the second end of the swing rod and the second connecting rod, and the end of the second connecting rod away from the first connecting rod is connected to the telescopic drive end of the support leg assembly.

[0010] In an embodiment of the present invention, the unlocking drive assembly also includes a mounting seat and a first limiting member. The mounting seat is arranged on the movable support leg and forms a mounting column. A mounting hole for the mounting column to pass through is provided on the swing rod. The first limiting member is arranged on the mounting column and is located on the side of the swing rod away from the mounting seat.

[0011] In an embodiment of the present invention, the swing arm includes a first swinging portion, a second swinging portion and a mounting portion. The mounting portion is arranged between the first swinging portion and the second swinging portion and is provided with a mounting hole. The locking pin is arranged at one end of the first swinging portion away from the mounting portion, and the end of the second swinging portion away from the mounting portion is hinged to the connecting rod group.

[0012] In an embodiment of the present invention, the unlocking drive assembly includes a roller group, a guide sleeve and a locking rope. The roller group and the guide sleeve are both arranged on the movable support leg. The guide sleeve is connected to the protruding locking hole on the movable support leg and extends downward. The locking pin is passed through the guide sleeve. The lower end of the locking pin is connected to the first end of the locking rope. The locking rope is wound around the roller group, and the second end of the locking rope is arranged on the telescopic driving end of the support leg assembly. The locking rope is used to pull the locking pin along the guide sleeve to insert it into the protruding locking hole when the telescopic driving end performs an extending movement, and to release the locking pin when the telescopic driving end performs a retracting movement.

[0013] In an embodiment of the present invention, the roller group includes a first roller, the installation position of the first roller is higher than the lower end of the guide sleeve, the locking rope passes around the top of the first roller, and the second end of the locking rope is provided with a connecting rod, which is provided on the telescopic drive end of the support leg assembly.

[0014] In an embodiment of the present invention, the unlocking drive assembly also includes a mounting frame, a second roller and an unlocking rope. The mounting frame is arranged on the movable leg, the second roller is arranged on the mounting frame and is located below the connecting rod, and the two ends of the unlocking rope are respectively connected to the lower end of the locking pin and the connecting rod one by one, and the unlocking rope is passed around the bottom of the second roller.

[0015] In order to achieve the above-mentioned object, the present invention further provides an engineering machine, which includes the outrigger device described above.

[0016] Through the above technical solution, the outrigger device and engineering machinery provided by the embodiment of the present invention have the following beneficial effects:

[0017] In the technical solution of the present invention, when the leg assembly is in a preset extended state, the telescopic driving end of the leg assembly performs an extended movement to drive the unlocking driving assembly, so that the unlocking driving assembly drives the locking piece to move upward and locks the extended locking portion, thereby realizing automatic locking of the leg assembly, without the need for manual locking of the leg assembly, effectively preventing the leg assembly from moving due to the operator forgetting to lock the leg assembly, and improving operation safety; and, when the leg assembly is in a preset extended state, the telescopic driving end of the leg assembly performs a retracted movement to drive the unlocking driving assembly, so that the unlocking driving assembly drives the locking piece to move downward and unlocks the extended locking portion, thereby realizing automatic unlocking of the leg assembly, without the need for manual unlocking of the leg assembly, effectively preventing the leg assembly from being retracted and stuck, or the leg assembly from being damaged, due to the operator forgetting to unlock the leg assembly. The leg device of the present invention does not require manual locking and unlocking of the leg assembly. The telescopic movement of the telescopic driving end of the leg assembly drives the unlocking driving assembly, so that the unlocking driving assembly drives the locking part to automatically lock the leg assembly and automatically unlock the leg assembly, omitting the operating steps, saving operating time, and making the operation convenient and quick.

[0018] Other features and advantages of the embodiments of the present invention will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings are used to provide a further understanding of the embodiments of the present invention and constitute part of the specification. Together with the following specific embodiments, they are used to explain the embodiments of the present invention, but do not constitute a limitation of the embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without inventive work. In the accompanying drawings:

[0020] Figure 1 is a schematic structural diagram of a leg assembly in a leg device according to an embodiment of the present invention;

[0021] Figure 2 2. It is a schematic structural diagram of a locking pin locking a leg assembly in a leg device according to an embodiment of the present invention;

[0022] Figure 3 yes Figure 2 A magnified schematic diagram of area A in the middle;

[0023] Figure 4 2 is a schematic structural diagram of a locking latch unlocking a leg assembly in a leg device according to an embodiment of the present invention;

[0024] Figure 5 yes Figure 4 A magnified schematic diagram of area B in the middle;

[0025] Figure 6 2. It is a schematic diagram of the assembly structure of the swing rod and the mounting seat in the leg device according to one embodiment of the present invention;

[0026] Figure 7 2 is a schematic diagram of the assembly structure of the swing rod and the first connecting rod in the leg device according to one embodiment of the present invention;

[0027] Figure 8 is a schematic diagram of the assembly structure of the first connecting rod and the second connecting rod in the leg device according to one embodiment of the present invention;

[0028] Figure 9 1 is a schematic structural diagram of a locking pin locking a leg assembly in a leg device according to another embodiment of the present invention.

[0029] Description of Reference Numerals

[0030] 10 Leg assembly 423 first pin

[0031] 11 Extend the locking portion 424 second pin

[0032] 11a extends out of the locking hole 425 and the second limiting member

[0033] 12 Fixed leg 426 Third limiter

[0034] 13 movable legs 43 mounting seat

[0035] 20 Foot Assembly 431 Mounting Column

[0036] 21 Support leg driving member 44 First limit member

[0037] 22 foot plate 45 first roller

[0038] 30 Locking element 46 Locking rope

[0039] 30a Locking pin 47 Connecting rod

[0040] 40 Unlock drive assembly 48 Third roller

[0041] 41 Swing rod 49 Adapter rod

[0042] 411 mounting hole 51 guide sleeve

[0043] 412 first swing part 52 mounting frame

[0044] 413 second swinging portion 53 second roller

[0045] 414 Mounting part 54 Unlocking pull rope

[0046] 42 connecting rod group 55 fourth roller

[0047] 421 first connecting rod 56 fifth roller

[0048] 422 Second connecting rod DETAILED DESCRIPTION

[0049] The following describes the specific embodiments of the present invention in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present invention and are not intended to limit the present invention.

[0050] The leg device of the present invention will be described below with reference to the accompanying drawings.

[0051] like Figures 1 to 5 and Figure 9 As shown, the present invention provides a leg device, which includes a leg mechanism and an unlocking mechanism. The leg mechanism includes a leg assembly 10 and a foot assembly 20 arranged on the leg assembly 10, and the leg assembly 10 is provided with an extended locking portion 11; the unlocking mechanism includes a locking member 30 and an unlocking drive assembly 40, and the unlocking drive assembly 40 is arranged on the telescopic drive end of the foot assembly 20 and is driven and connected to the locking member 30, and the locking member 30 is used to be set corresponding to the extended locking portion 11 when the leg assembly 10 is in a preset extended state, and the unlocking drive assembly 40 is used to drive the locking member 30 to lock the extended locking portion 11 when the telescopic drive end performs an extended movement, and to drive the locking member 30 to unlock the extended locking portion 11 when the telescopic drive end performs a retracted movement.

[0052] Specifically, the leg assembly 10 has an extended state and a retracted state. When the leg assembly 10 is in a preset extended state, the extension locking portion 11 on the leg assembly 10 is used to lock with the locking member 30 to lock the leg assembly 10; the foot assembly 20 is provided on the leg assembly 10, and the telescopic driving end of the foot assembly 20 is used to perform an extension movement to support the leg assembly 10 when the leg assembly 10 is in a preset extended state; the unlocking driving assembly 40 is provided on the telescopic driving end of the foot assembly 20, and the locking member 30 is connected to the unlocking driving assembly 40.

[0053] The locking mechanism 30 of the support leg 10 is unlocked and the locking mechanism 30 is unlocked, so that the support leg 10 is automatically unlocked.

[0054] The leg device of the embodiment of the present invention does not require manual locking and unlocking of the leg assembly 10. The telescopic movement of the telescopic driving end of the leg assembly 20 drives the unlocking driving assembly 40, so that the unlocking driving assembly 40 drives the locking part 30 to automatically lock the leg assembly 10 and automatically unlock the leg assembly 10, omitting the operating steps, saving operating time, and making the operation convenient and quick.

[0055] In an embodiment of the present invention, the leg assembly 10 includes a fixed leg 12 and a movable leg 13 telescopically arranged on the fixed leg 12. The extension locking portion 11 is configured as two extension locking holes 11a respectively opened on the fixed leg 12 and the movable leg 13, and the two extension locking holes 11a are vertically connected when the movable leg 13 is in a preset extended state relative to the fixed leg 12. The locking member 30 is configured as a vertically arranged locking pin 30a. The unlocking drive assembly 40 is used to drive the locking pin 30a to be inserted into the extension locking hole 11a when the telescopic drive end performs an extension movement, and to drive the locking pin 30a to withdraw from the extension locking hole 11a when the telescopic drive end performs a retraction movement.

[0056] like Figures 1 to 5 and Figure 9As shown, the movable leg 13 and the fixed leg 12 are nested and can be extended and retracted relative to the fixed leg 12. When the movable leg 13 is in a preset extended state relative to the fixed leg 12, the movable leg 13 is fully extended relative to the fixed leg 12, and the extended locking hole 11a on the movable leg 13 is connected with the extended locking hole 11a on the fixed leg 12. The extended locking hole 11a on the movable leg 13 is opened at the top of the movable leg 13, and the extended locking hole 11a on the fixed leg 12 is opened at the top of the fixed leg 12, so that the two extended locking holes 11a can be connected in the upper and lower directions to facilitate the locking pin 30a to pass through the two extended locking holes 11a, thereby improving the smoothness of the movement of the locking pin 30a.

[0057] Furthermore, when the movable leg 13 is in a preset extended state relative to the fixed leg 12, the two extended locking holes 11a are used for inserting the locking pin 30a to lock the leg assembly 10; the leg assembly 20 is provided on the leg assembly 10, and the telescopic driving end of the leg assembly 20 is used to extend the movable leg 13 when it is in a preset extended state relative to the fixed leg 12 to support the leg assembly 10; the unlocking driving assembly 40 is provided on the telescopic driving end of the leg assembly 20, and the locking pin 30a is connected to the unlocking driving assembly 40.

[0058] In the embodiment of the present invention, when the movable leg 13 is in a preset extended state relative to the fixed leg 12, the telescopic drive end of the leg assembly 20 extends to drive the unlocking drive assembly 40, so that the unlocking drive assembly 40 drives the locking latch 30a to move upward and insert it into the extended locking hole 11a, thereby realizing the automatic locking of the leg assembly 10, without the need for manual insertion of the locking latch 30a, effectively preventing the leg assembly 10 from moving due to the operator forgetting to insert the locking latch 30a, thereby improving the operation safety. Moreover, when the movable leg 13 is in a preset extended state relative to the fixed leg 12, the telescopic driving end of the leg assembly 20 retracts to drive the unlocking driving assembly 40, so that the unlocking driving assembly 40 drives the locking pin 30a to move downward and withdraw from the extended locking hole 11a, thereby realizing automatic unlocking of the leg assembly 10, and there is no need to manually pull out the locking pin 30a, effectively preventing the leg assembly 10 from being retracted and stuck, or damaged, due to the operator forgetting to remove the locking pin 30a.

[0059] The leg device of the embodiment of the present invention does not require manual insertion and removal of the locking pin 30a. The telescopic movement of the telescopic drive end of the leg assembly 20 drives the unlocking drive assembly 40, so that the unlocking drive assembly 40 drives the locking pin 30a to automatically lock the leg assembly 10 and automatically unlock the leg assembly 10, omitting the operating steps, saving operating time, and making the operation convenient and quick.

[0060] In the embodiment of the present invention, Figure 2 、 Figure 4 and Figure 9 As shown, the leg assembly 20 includes a leg drive 21 and a leg plate 22. The leg drive 21 has a fixed end and a telescopic drive end. The fixed end of the leg drive 21 is connected to the end of the movable leg 13 away from the fixed leg 12. The telescopic drive end of the leg drive 21 can extend and retract relative to the fixed end. The leg plate 22 is connected to the bottom of the telescopic drive end, and the unlocking drive assembly 40 is connected to the telescopic drive end, so that the telescopic drive end can drive the leg plate 22 to be supported on the ground when extending and drive the unlocking drive assembly 40 to drive the locking pin 30a to lock the leg assembly 10, and can drive the leg plate 22 to retract and drive the unlocking drive assembly 40 to drive the locking pin 30a to unlock the leg assembly 10 when retracting.

[0061] In the embodiment of the present invention, the unlocking drive assembly 40 includes a swing rod 41 and a connecting rod assembly 42. The swing rod 41 is swingably provided on the movable leg 13. The locking latch 30a is provided at the first end of the swing rod 41. The second end of the swing rod 41 is hinged to the connecting rod assembly 42. The connecting rod assembly 42 is provided on the telescopic driving end of the support leg assembly 20. Figures 2 to 5 As shown, when the telescopic driving end of the leg assembly 20 is extending, the telescopic driving end drives the connecting rod group 42, so that the connecting rod group 42 drives the swing rod 41 to rotate clockwise, and then the swing rod 41 drives the locking pin 30a to move upward and pass through the two extended locking holes 11a to achieve automatic locking of the leg assembly 10; when the telescopic driving end of the leg assembly 10 is retracting, the telescopic driving end drives the connecting rod group 42, so that the connecting rod group 42 drives the swing rod 41 to rotate counterclockwise, and then the swing rod 41 drives the locking pin 30a to move downward and exit the extended locking hole 11a to achieve automatic unlocking of the leg assembly 10. The unlocking driving assembly 40 does not require manual operation, nor does it require complex hydraulic drive and electrical control. The automatic locking and automatic unlocking of the locking pin 30a can be achieved only through the telescopic movement of the telescopic driving end. The operation is convenient, safe and reliable, and effectively avoids human error. In addition, the extension movement of the telescopic drive end can also drive the support leg plate 22 to extend to support the leg assembly 10, and the retraction movement can also drive the support leg plate 22 to retract after the operation is completed. The functional integration is high, which further improves the convenience of operation.

[0062] In the embodiment of the present invention, the connecting rod assembly 42 includes a first connecting rod 421 and a second connecting rod 422. The two ends of the first connecting rod 421 are respectively hinged to the second end of the swing rod 41 and the second connecting rod 422 in a one-to-one correspondence, and the end of the second connecting rod 422 away from the first connecting rod 421 is connected to the telescopic driving end of the support leg assembly 20. Figures 2 to 5As shown, the swing rod 41, the first link 421 and the second link 422 are hinged in sequence, the swing rod 41 is swingably arranged on the movable support leg 13, the locking pin 30a is connected to the end of the swing rod 41 away from the first link 421, and the end of the second link 422 away from the first link 421 is connected to the telescopic drive end of the support leg assembly 20. When the telescopic driving end of the support leg assembly 20 is extending, it drives the second connecting rod 422, the first connecting rod 421 and the swing rod 41 in sequence, so that the swing rod 41 rotates clockwise and drives the locking pin 30a to insert into the extended locking hole 11a to lock the movable leg 13, preventing the movable leg 13 from moving, thereby improving the safety of operation; when the telescopic driving end of the support leg assembly 20 is retracting, it drives the second connecting rod 422, the first connecting rod 421 and the swing rod 41 in sequence, so that the swing rod 41 rotates counterclockwise and drives the locking pin 30a to withdraw from the extended locking hole 11a to unlock the movable leg 13, thereby preventing the locking pin 30a from getting stuck in the movable leg 13, thereby improving the smoothness of the contraction of the movable leg 13. In addition, the first connecting rod 421 and the second connecting rod 422 are hinged in sequence, and the telescopic driving end drives the swing rod 41 to rotate through the first connecting rod 421 and the second connecting rod 422, thereby improving the rotation smoothness of the swing rod 41. The first connecting rod 421 and the second connecting rod 422 are arranged around the outer periphery of the support leg driving component 21, so as to avoid the support leg driving component 21, and the structural design is reasonable.

[0063] In the embodiment of the present invention, the unlocking drive assembly 40 further includes a mounting seat 43 and a first stopper 44. The mounting seat 43 is provided on the movable leg 13 and is formed with a mounting post 431. The swing lever 41 is provided with a mounting hole 411 for the mounting post 431 to pass through. The first stopper 44 is provided on the mounting post 431 and is located on the side of the swing lever 41 away from the mounting seat 43. Figure 6 As shown, the movable leg 13 is provided with a mounting seat 43, and a mounting post 431 is formed on the mounting seat 43. A mounting hole 411 is opened on the swing rod 41, and the mounting post 431 is arranged through the mounting hole 411 to enable the swing rod 41 to rotate relative to the movable leg 13, thereby driving the locking pin 30a to automatically lock the leg assembly 10 and automatically unlock the leg assembly 10, without manual operation, and the operation is convenient and fast; and a first limiting member 44 is provided on the mounting post 431 for limiting the swing rod 41. The first limiting member 44 and the mounting seat 43 are respectively arranged on both sides of the swing rod 41 to cooperate with the limiting swing rod 41 to prevent the swing rod 41 from separating from the mounting post 431. The structure is stable and reliable, and the first limiting member 44 can adopt the shaft retaining ring in the prior art. The first limiting member 44 is sleeved on the mounting post 431 and abuts on the side of the swing rod 41 away from the mounting seat 43 to limit the swing rod 41.

[0064] Furthermore, the unlocking drive assembly 40 also includes a first pin shaft 423, which passes through the swing rod 41 and the first connecting rod 421, so that the swing rod 41 is hinged to the first connecting rod 421, and the first pin shaft 423 is provided with a second limiting member 425 for limiting the swing rod 41 and the first connecting rod 421. The second limiting member 425 can adopt a shaft retaining ring in the prior art. The second limiting member 425 is sleeved on the first pin shaft 423 and abuts against the side of the first connecting rod 421 away from the swing rod 41, so that the swing rod 41 and the first connecting rod 421 rotate smoothly and the connection structure is stable. Figure 7 As shown; and, the unlocking drive assembly 40 further includes a second pin shaft 424, which passes through the first connecting rod 421 and the second connecting rod 422, so that the first connecting rod 421 and the second connecting rod 422 are hinged, and the second pin shaft 424 is sleeved with a third limiting member 426 for limiting the first connecting rod 421 and the second connecting rod 422. The third limiting member 426 can adopt a shaft retaining ring in the prior art. The third limiting member 426 is sleeved on the second pin shaft 424 and abuts against the side of the first connecting rod 421 away from the second connecting rod 422, so that the first connecting rod 421 and the second connecting rod 422 rotate smoothly and the connection structure is stable, as shown in FIG. Figure 8 shown.

[0065] In the embodiment of the present invention, the swing lever 41 includes a first swing portion 412, a second swing portion 413 and a mounting portion 414. The mounting portion 414 is disposed between the first swing portion 412 and the second swing portion 413 and has a mounting hole 411. The locking latch 30a is disposed at one end of the first swing portion 412 away from the mounting portion 414, and the other end of the second swing portion 413 away from the mounting portion 414 is hinged to the connecting rod assembly 42. Figures 2 to 7 As shown, the mounting hole 411 is opened on the mounting portion 414, so that the mounting portion 414 can be sleeved on the mounting column 431, and the first swinging portion 412 and the second swinging portion 413 are respectively arranged at both ends of the mounting portion 414, the locking latch 30a is connected to the first swinging portion 412, and the second swinging portion 413 is connected to the telescopic driving end of the support leg assembly 20; the telescopic driving end performs telescopic movement to drive the second connecting rod 422, the first connecting rod 421 and the second swinging portion 413 in sequence, so that the second swinging portion 413 drives the first swinging portion 412 to swing with the mounting portion 414 as the rotation center, and then the first swinging portion 412 drives the locking latch 30a to automatically lock the movable leg 13 and automatically unlock the movable leg 13, without the need to manually insert and remove the locking latch 30a, and the operation is convenient and quick.

[0066] In another embodiment of the present invention, the unlocking drive assembly 40 includes a roller group, a guide sleeve 51 and a locking rope 46. The roller group and the guide sleeve 51 are both arranged on the movable leg 13. The guide sleeve 51 is connected to the protruding locking hole 11a on the movable leg 13 and extends downward. The locking pin 30a is passed through the guide sleeve 51. The lower end of the locking pin 30a is connected to the first end of the locking rope 46. The locking rope 46 is wound around the roller group, and the second end of the locking rope 46 is arranged on the telescopic driving end of the support leg assembly 20. The locking rope 46 is used to pull the locking pin 30a along the guide sleeve 51 to insert it into the protruding locking hole 11a when the telescopic driving end performs an extending movement, and to release the locking pin 30a when the telescopic driving end performs a retracting movement.

[0067] like Figure 9 As shown, when the telescopic driving end of the leg assembly 20 is extending, the telescopic driving end pulls the locking rope 46, so that the locking rope 46 pulls the locking pin 30a to move upward along the extension direction of the guide sleeve 51 and pass through the two extended locking holes 11a to achieve automatic locking of the leg assembly 10; when the telescopic driving end of the leg assembly 10 is retracting, the telescopic driving end loosens the locking rope 46, so that the locking rope 46 loosens the locking pin 30a, and the locking pin 30a moves downward along the extension direction of the guide sleeve 51 under gravity and exits the extended locking hole 11a to achieve automatic unlocking of the leg assembly 10. The unlocking driving assembly 40 does not require manual operation, nor does it require complex hydraulic drive and electrical control. The automatic locking and automatic unlocking of the locking pin 30a can be achieved only through the telescopic movement of the telescopic driving end. The operation is convenient, safe and reliable, and effectively avoids human error. In addition, the upper end of the guide sleeve 51 is connected to the movable leg 13 and communicates with the extended locking hole 11a on the movable leg 13, and the guide sleeve 51 extends downward from the extended locking hole 11a on the movable leg 13. The guide sleeve 51 is used for the locking pin 30a to extend into to guide the locking pin 30a to move upward to insert into the extended locking hole 11a, and guide the locking pin 30a to move downward to exit the extended locking hole 11a, thereby improving the movement smoothness of the locking pin 30a and making locking and unlocking smooth and reliable.

[0068] In another embodiment of the present invention, the roller assembly includes a first roller 45, the installation position of the first roller 45 is higher than the lower end of the guide sleeve 51, the locking rope 46 passes over the top of the first roller 45, and the second end of the locking rope 46 is provided with a connecting rod 47, and the connecting rod 47 is provided on the telescopic driving end of the support leg assembly 20. Figure 9As shown, when the telescopic driving end of the leg assembly 20 is extended, the telescopic driving end drives the connecting rod 47 to move downward, so that the connecting rod 47 pulls the locking rope 46, and then the locking rope 46 pulls the locking pin 30a to move upward along the extension direction of the guide sleeve 51 and pass through the two extended locking holes 11a to achieve automatic locking of the leg assembly 10; when the telescopic driving end of the leg assembly 10 is retracted, the telescopic driving end drives the connecting rod 47 to move upward, so that the connecting rod 4 The locking rope 46 is loosened, thereby causing the locking rope 46 to loosen the locking pin 30a. The locking pin 30a is moved downward along the extension direction of the guide sleeve 51 by gravity and withdraws from the locking hole 11a to achieve automatic unlocking of the leg assembly 10. The unlocking drive assembly 40 does not require manual operation, nor does it require complex hydraulic drive and electrical control. The automatic locking and unlocking of the locking pin 30a can be achieved only through the telescopic movement of the telescopic drive end. The operation is convenient, safe and reliable, and human error is effectively avoided.

[0069] Furthermore, the locking pin 30a is disposed within the guide sleeve 51 and is capable of moving up and down along the extension direction of the guide sleeve 51. The guide sleeve 51 not only guides the movement of the locking pin 30a but also cooperates with the locking cord 46 to confine the locking pin 30a within the guide sleeve 51, thereby improving the smooth movement of the locking pin 30a and thereby enhancing the reliability of automatic locking and unlocking. Furthermore, the first roller 45 is mounted higher than the lower end of the guide sleeve 51, enabling the locking cord 46 to pull the locking pin 30a upward, confining the locking pin 30a within the guide sleeve 51 for upward movement along the guide sleeve 51 and insertion into the extended locking hole 11a. Furthermore, when the locking cord 46 retracts the telescopic drive end, the locking pin 30a is released, allowing the locking pin 30a to exit the extended locking hole 11a and remain confined within the guide sleeve 51, resulting in a rational structural design.

[0070] Furthermore, the unlocking drive assembly 40 further includes a mounting frame 52, a second roller 53, and an unlocking pull rope 54. The mounting frame 52 is provided on the movable leg 13, the second roller 53 is provided on the mounting frame 52 and is located below the connecting rod 47, and the two ends of the unlocking pull rope 54 are respectively connected to the lower end of the locking pin 30a and the connecting rod 47 in a one-to-one correspondence, and the unlocking pull rope 54 passes around the bottom of the second roller 53. Figure 9As shown, the upper end of the mounting frame 52 is connected to the movable leg 13 and extends downward from the movable leg 13. The second roller 53 is provided at the lower end of the mounting frame 52 and is located below the connecting rod 47. When the telescopic driving end of the support leg assembly 20 is retracted, the connecting rod 47 moves upward following the telescopic driving end and pulls the unlocking rope 54, so that the unlocking rope 54 pulls the locking pin 30a downward, ensuring that the locking pin 30a can be withdrawn and extended out of the locking hole 11a to unlock the movable leg 13, effectively preventing the locking pin 30a from being stuck in unlocking, and improving the unlocking smoothness of the locking pin 30a.

[0071] In another embodiment of the present invention, Figure 9 As shown, the roller assembly also includes a third roller 48, which is spaced apart from the first roller 45 along the length direction of the movable leg 13 on the movable leg 13 and located above the connecting rod 47. The locking rope 46 passes over the first roller 45 and the third roller 48. The third roller 48 is used to tension the locking rope 46 so that the locking rope 46 at least partially extends along the length direction of the movable leg 13, which not only improves the movement smoothness of the locking rope 46, but also avoids movement interference, and the structural design is reasonable; and the lower end of the locking pin 30a is also connected to the transfer rod 49, which extends out of the guide sleeve 51 and is connected to the locking rope 46 so that the locking rope 46 pulls the locking pin 30a upward through the transfer rod 49, further improving the locking smoothness.

[0072] In another embodiment of the present invention, Figure 9 As shown, the unlocking drive assembly 40 also includes a fourth roller 55 and a fifth roller 56. The fourth roller 55 and the fifth roller 56 are arranged at intervals on the movable leg 13, and the fourth roller 55 is located above the connecting rod 47, and the fifth roller 56 is located below the guide sleeve 51. The unlocking rope 54 passes around the bottom of the second roller 53, the top of the fourth roller 55 and the bottom of the fifth roller 56 in sequence and is connected to the lower end of the locking pin 30a. The fourth roller 55 and the fifth roller 56 are both used to tension the unlocking rope 54 so that the unlocking rope 54 extends at least partially along the length direction of the movable leg 13, which not only improves the smoothness of the movement of the unlocking rope 54, but also avoids causing motion interference. The structural design is reasonable.

[0073] In addition, the present invention also provides an engineering machinery, which can be set as an engineering machinery with a support leg assembly 10 such as a truck crane. The engineering machinery includes the support leg device described above, and the specific structure of the support leg device refers to the above embodiment. Since the engineering machinery adopts all the technical solutions of the above embodiment, it has at least all the beneficial effects brought by the technical solutions of the above embodiment, which will not be repeated here.

[0074] In the description of the present invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0075] In the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0076] In the description of this specification, the reference terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0077] Although the embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A leg support device, characterized in that: The outrigger device comprises: A leg support mechanism comprises a leg support assembly (10) and a foot support assembly (20) provided on the leg support assembly (10), wherein the leg support assembly (10) is provided with an extension locking portion (11); An unlocking mechanism comprises a locking member (30) and an unlocking drive assembly (40), wherein the unlocking drive assembly (40) is arranged on the telescopic drive end of the leg assembly (20) and is driven and connected to the locking member (30), wherein the locking member (30) is used to be arranged corresponding to the extension locking portion (11) when the leg assembly (10) is in a preset extension state, and the unlocking drive assembly (40) is used to drive the locking member (30) to lock the extension locking portion (11) when the telescopic drive end performs an extension movement, and to drive the locking member (30) to unlock the extension locking portion (11) when the telescopic drive end performs a retraction movement.

2. The leg support device according to claim 1, characterized in that: The leg assembly (10) comprises a fixed leg (12) and a movable leg (13) telescopically arranged on the fixed leg (12); the extension locking portion (11) is configured as two extension locking holes (11a) respectively provided on the fixed leg (12) and the movable leg (13); and the two extension locking holes (11a) are vertically connected when the movable leg (13) is in the preset extended state relative to the fixed leg (12); the locking member (30) is configured as a vertically arranged locking pin (30a); and the unlocking drive assembly (40) is configured to drive the locking pin (30a) to be inserted into the extension locking hole (11a) when the telescopic drive end performs an extension movement, and to drive the locking pin (30a) to be withdrawn from the extension locking hole (11a) when the telescopic drive end performs a retraction movement.

3. The leg support device according to claim 2, characterized in that: The unlocking drive assembly (40) includes a swing rod (41) and a connecting rod group (42), wherein the swing rod (41) is swingably arranged on the movable leg (13), the locking pin (30a) is arranged at the first end of the swing rod (41), and the second end of the swing rod (41) is hinged to the connecting rod group (42), and the connecting rod group (42) is arranged on the telescopic driving end of the support leg assembly (20).

4. The leg support device according to claim 3, characterized in that: The connecting rod group (42) includes a first connecting rod (421) and a second connecting rod (422), the two ends of the first connecting rod (421) are respectively hinged to the second end of the swing rod (41) and the second connecting rod (422) in a one-to-one correspondence, and the end of the second connecting rod (422) away from the first connecting rod (421) is connected to the telescopic driving end of the support leg assembly (20).

5. The leg support device according to claim 3, characterized in that: The unlocking drive assembly (40) further includes a mounting seat (43) and a first limiting member (44); the mounting seat (43) is arranged on the movable leg (13) and is formed with a mounting post (431); a mounting hole (411) for the mounting post (431) to pass through is provided on the swing lever (41); and the first limiting member (44) is arranged on the mounting post (431) and is located on a side of the swing lever (41) away from the mounting seat (43).

6. The leg support device according to claim 5, characterized in that: The swing lever (41) comprises a first swing portion (412), a second swing portion (413) and a mounting portion (414); the mounting portion (414) is arranged between the first swing portion (412) and the second swing portion (413) and is provided with the mounting hole (411); the locking pin (30a) is arranged at one end of the first swing portion (412) away from the mounting portion (414); and the end of the second swing portion (413) away from the mounting portion (414) is hinged to the connecting rod group (42).

7. The leg support device according to claim 2, characterized in that: The unlocking drive assembly (40) includes a roller group, a guide sleeve (51) and a locking rope (46). The roller group and the guide sleeve (51) are both arranged on the movable leg (13). The guide sleeve (51) is connected to the extended locking hole (11a) on the movable leg (13) and extends downward. The locking pin (30a) is inserted into the guide sleeve (51). The lower end of the locking pin (30a) is connected to the first end of the locking rope (46). The locking rope (46) is wound around the roller assembly, and the second end of the locking rope (46) is arranged on the telescopic driving end of the support leg assembly (20). The locking rope (46) is used to pull the locking pin (30a) along the guide sleeve (51) and insert it into the extending locking hole (11a) when the telescopic driving end performs an extending movement, and to loosen the locking pin (30a) when the telescopic driving end performs a retracting movement.

8. The leg support device according to claim 7, characterized in that: The roller assembly includes a first roller (45), the installation position of the first roller (45) is higher than the lower end of the guide sleeve (51), the locking rope (46) passes over the top of the first roller (45), and the second end of the locking rope (46) is provided with a connecting rod (47), and the connecting rod (47) is provided on the telescopic driving end of the support leg assembly (20).

9. The leg support device according to claim 8, characterized in that: The unlocking drive assembly (40) further includes a mounting frame (52), a second roller (53) and an unlocking pull rope (54), wherein the mounting frame (52) is arranged on the movable leg (13), the second roller (53) is arranged on the mounting frame (52) and is located below the connecting rod (47), the two ends of the unlocking pull rope (54) are respectively connected to the lower end of the locking pin (30a) and the connecting rod (47), and the unlocking pull rope (54) passes around the bottom of the second roller (53).

10. An engineering machine, characterized in that: The engineering machine comprises the outrigger device according to any one of claims 1 to 9.

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