A lateral safety structure for a crane

Abstract

The present invention relates to the technical field of crane equipment, and discloses a lateral safety structure for a crane, which includes a lateral telescopic outrigger, comprising a box body and a telescopic leg nested and connected in the box body; a vehicle frame fixedly connected to the box body; a lock provided between the telescopic leg and the vehicle frame / box body for locking the telescopic leg and the vehicle frame, the lock having a locking position for connecting the telescopic leg and the vehicle frame into one body and an unlocking position for separating the telescopic leg and the vehicle frame from each other; the lock includes a fixing member and a hook, the hook is rotatably connected to the fixing member, and the hook rotates around the fixing member to move from the locking position to the unlocking position. The present invention can safely lock the lateral telescopic outrigger of the crane, avoiding accidents caused by the extension of the lateral telescopic outrigger of the crane during driving.

Description

Technical Field

[0001] The present invention relates to the technical field of crane equipment, and particularly to a lateral safety structure for a crane. Background Art

[0002] When a crane is lifting, the stability of the crane is very important for medium and large-tonnage truck-mounted cranes. Currently, the stability of the crane is improved by setting outriggers. The span of the telescopic outriggers of existing cranes is relatively large, so the telescopic outriggers of the crane adopt a double-extension outrigger design, that is, the horizontal cylinders of the telescopic outriggers are two cylinders connected in series. Due to the space limitation of the telescopic outriggers and the reasons of the hydraulic system, there is no special locking device installed in the oil circuit of the existing horizontal telescopic cylinders, and the cylinders are locked by the lower vehicle control valve. Due to the different spool functions of the lower vehicle control valve, the effect of the lower vehicle control valve locking the horizontal telescopic cylinder is average, which will cause the horizontal telescopic cylinder of the truck-mounted crane to automatically extend a certain distance, and the telescopic outrigger will extend under the drive of the horizontal telescopic cylinder. After the telescopic outrigger extends, the width of the whole truck-mounted crane will exceed 2.5 meters or even larger. In this way, accidents may occur whether in the parking situation or during the driving process of the whole vehicle, which has great potential safety hazards. Summary of the Invention

[0003] The purpose of the present invention is to provide a lateral safety structure for a crane, which can improve the safety of the lateral telescopic outrigger.

[0004] To achieve the above purpose, the present invention provides a lateral safety structure for a crane, including:

[0005] A lateral telescopic outrigger, including a box body and a telescopic leg nested and connected in the box body, the telescopic leg having a retracted position where it retracts linearly into the box body and an extended position where it extends out of the box body;

[0006] A vehicle frame, fixedly connected to the box body;

[0007] A lock, arranged between the telescopic leg and the vehicle frame, for locking the telescopic leg and the vehicle frame / box body, the lock having a locked position where the telescopic leg and the vehicle frame / box body are connected as a whole and an unlocked position where the telescopic leg and the vehicle frame / box body are separated from each other.

[0008] As a preferred solution, the lock includes a fixed part and a hook, the hook is rotatably connected to the fixed part, and the hook rotates around the fixed part to move from the locked position to the unlocked position.

[0009] As a preferred solution, it further includes a locking member. The hook has an inclined surface, and a sliding surface is formed on the part of the locking member corresponding to the inclined surface. The sliding surface can extrude the inclined surface, so that the linear motion of the locking member is converted into the rotational motion of the hook around the fixing member.

[0010] As a preferred solution, the hook has a recess, the locking member is rod-shaped, and the recess can be buckled on the outer side wall of the locking member. When the recess is buckled with the locking member, the lock is in the locked position;

[0011] When the locking member moves linearly, it drives the hook to rotate. The hook vacates space for the locking member. When the locking member moves to the recess, the recess is buckled onto the locking member, and the lock moves from the unlocked position to the locked position.

[0012] As a preferred solution, it further includes a torsion spring. The torsion spring is elastically connected between the fixing member and the hook, and the torsion spring is used to provide a biasing force for the lock to move from the unlocked position to the locked position.

[0013] As a preferred solution, it further includes a handle fixedly connected to the hook. When an external force pulls the handle, the handle drives the hook to rotate, and the lock moves from the locked position to the unlocked position.

[0014] As a preferred solution, a through hole is provided on the hook, a fixing shaft is provided on the fixing member, the fixing shaft is rotatably connected in the through hole, the torsion spring is sleeved on the fixing member, and a fixing bolt is connected to the end of the fixing shaft.

[0015] As a preferred solution, the fixing member further includes a base and a vertical plate. The vertical plate is vertically connected to the base, and the vertical plate is fixedly connected to the fixing shaft.

[0016] As a preferred solution, the fixing member is provided on the frame / case, and the locking member is provided on the telescopic leg.

[0017] As a preferred solution, the fixing member is provided on the telescopic leg, and the locking member is provided on the frame / case.

[0018] The present invention provides a lateral safety structure for a crane. A locking buckle is arranged between the telescopic leg and the vehicle frame / box body. The lateral telescopic outrigger includes a box body and a telescopic leg nested and connected in the box body. When the telescopic leg is retracted into the box body, the locking buckle can lock the telescopic leg and the vehicle frame / box body, so that the locking buckle connects the telescopic leg and the vehicle frame / box body into one body, avoiding the telescopic legs of the whole truck-mounted crane from disengaging from the box body during the parking state and the driving process, restricting the overall width of the truck-mounted crane within a certain range, and improving the safety of the whole truck-mounted crane. When the telescopic leg needs to extend out of the box body, the locking buckle separates the telescopic leg and the vehicle frame / box body from each other to reach the unlocking position, so that the telescopic legs of the whole crane reach the unlocking position, realizing the supporting function for the whole crane.

[0019] Further, when the telescopic leg of the present invention is retracted into the box body, the locking buckle can, under the push of the telescopic leg, make the hook rotate around the fixing member from the locking position to the unlocking position to lock the telescopic leg and the vehicle frame / box body, that is, the telescopic leg can be automatically locked by the locking buckle without manual operation, avoiding the situation where manual operation may forget to lock the telescopic leg by the locking buckle, and further avoiding the telescopic legs of the whole truck-mounted crane from disengaging from the box body during the parking state and the driving process, and improving the safety of the whole truck-mounted crane. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is the front view structural schematic diagram of the connection between the telescopic leg and the box body of the lateral safety structure of the crane in the embodiment of the present invention;

[0021] Figure 2 is the top view structural schematic diagram of the connection between the telescopic leg and the box body of the lateral safety structure of the crane in the embodiment of the present invention;

[0022] Figure 3 is the three-dimensional structural schematic diagram of the lateral safety structure of the crane in the embodiment of the present invention arranged on the vehicle frame;

[0023] In the figure, 100, lateral telescopic outrigger; 110, box body; 120, telescopic leg; 200, vehicle frame; 300, locking buckle; 310, fixing member; 311, fixing shaft; 312, fixing bolt; 313, base; 314, vertical plate; 320, hook; 321, inclined surface; 322, recess; 323, through hole; 330, locking member; 400, torsion spring; 500, handle. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] The following combines the drawings and embodiments to further describe in detail the specific embodiments of the present invention. The following embodiments are used to illustrate the present invention but are not used to limit the scope of the present invention.

[0025] As Figures 1 to 3As shown, a lateral safety structure of a preferred embodiment of the present invention is used to lock the telescopic leg of the lateral telescopic outrigger and the vehicle frame to prevent the telescopic leg from disengaging from the box body.

[0026] Based on the above technical solution, a lateral safety structure of a crane is provided in this embodiment, including a lateral telescopic outrigger 100. The lateral telescopic outrigger 100 is an outrigger structure used to support the whole crane and improve the safety of the whole crane. The lateral telescopic outrigger 100 includes a box body 110 and a telescopic leg 120 nested and connected in the box body 110. Among them, the box body 110 and the telescopic leg 120 form a telescopic structure, and an oil cylinder is provided between the box body 110 and the telescopic leg 120. The oil cylinder can drive the telescopic leg 120 to extend into and out of the box body 110.

[0027] Specifically, the oil cylinder drives the telescopic leg 120 to extend into and out of the box body 110, so that the telescopic leg 120 has a contracted position where it retracts linearly into the box body 110 and an extended position where it extends out of the box body 110. When the telescopic leg 120 retracts into the box body 110, it is necessary to lock the telescopic leg 120 in the box body 110.

[0028] This structure further includes a vehicle frame 200, which is fixedly connected to the box body 110, so that the lateral telescopic outrigger 100 can be fixed to the vehicle frame 200, enabling the lateral telescopic outrigger 100 to support the vehicle frame 100.

[0029] Specifically, as Figures 1 to 3 shown, this structure further includes a lock 300, which is arranged between the telescopic leg 120 and the vehicle frame 200 / box body 110. The lock 300 is used to lock the telescopic leg 120 and the vehicle frame 200 / box body 110, that is, the lock 300 can be arranged between the telescopic leg 120 and the vehicle frame 200, or between the telescopic leg 120 and the box body 110, both of which can fix the telescopic leg 120 and play a role in fixing the telescopic leg 120 in the box body 110.

[0030] Specifically, the lock 300 has a locked position where the telescopic leg 120 is connected to the vehicle frame 200 / box body 110 as a whole and an unlocked position where the telescopic leg 120 and the vehicle frame 200 / box body 110 are separated from each other. When it is necessary to extend the telescopic leg 120, the lock 300 is set in the unlocked position so that the telescopic leg 120 can extend out of the box body 110; after the telescopic leg 120 is retracted and the telescopic leg 120 is not needed, the lock 300 is set in the locked position, which can prevent the telescopic leg 120 from extending out of the box body 110 and play a role in safety protection.

[0031] Preferably, as Figure 1As shown, the lock buckle 300 includes a fixing member 310 and a hook 320. The hook 320 is rotatably connected to the fixing member 310. The fixing member 310 can be connected to the hook 320 by a rotating shaft connection, a pin connection, etc., so that the hook 320 rotates around the fixing member 310 and moves from a locked position to an unlocked position, thereby realizing the locking and unlocking of the lock buckle 300 by the hook 320.

[0032] Preferably, if Figure 1 As shown, it also includes a locking member 330, and the hook 320 has an inclined surface 321. The portion of the locking member 330 corresponding to the inclined surface 321 is formed with a sliding surface 331. When the inclined surface 321 contacts the sliding surface 331, relative sliding can occur. During relative sliding, the sliding surface 331 can press the inclined surface 321, so that the linear motion of the locking member 330 is converted into the rotational motion of the hook 320 around the fixing member 310, thereby realizing the locking and unlocking of the lock buckle 300 by the hook 320.

[0033] Among them, the sliding surface 331 can be a smooth plane, and the inclination angle of the inclined surface 321 relative to the linear motion trajectory of the locking member 330 can be 45 degrees, 30 degrees or 60 degrees, so that the inclined surface 321 and the sliding surface 331 can drive the hook 320 to rotate to a larger range through sliding.

[0034] Preferably, if Figure 1 As shown, the hook 320 has a recess 322, and the locking member 330 is in the shape of a rod. The recess 322 can be buckled on the outer wall of the locking member 330. The recess 322 is in a notch-shaped structure, and the recess 322 can also be set as a hook-shaped structure. When the recess 322 is buckled with the locking member 330, the locking member 330 limits the return of the recess 322, so that the lock 300 is in the locked position, that is, the hook 320 completes the locking of the lock 300. Among them, the hook 320 can be pressed on the locking member 330 by a biasing force such as gravity and pressure, so that the hook 320 will not be separated from the locking member 330, and the hook 320 can continuously lock the locking member 330.

[0035] Through the above process, the present structure can automatically lock the telescopic legs 120 without additional operation. When the operator forgets to manually lock the telescopic legs 120, the telescopic legs 120 can also be locked, thereby improving the safety of the truck crane.

[0036] Specifically, the locking process of this structure is: when the locking member 330 makes a linear motion, it drives the hook 320 to rotate, and the hook 320 makes room for the locking member 330, that is, when the locking member 330 moves to the recess 322, the recess 322 is engaged with the locking member 330, so that the lock 300 moves from the unlocked position to the locked position.

[0037] Preferably, if Figure 1 ,Figure 2 As shown, it further includes a torsion spring 400. The torsion spring 400 is elastically connected between the fixing member 310 and the hook 320. Both ends of the torsion spring 400 are clamped between the fixing member 310 and the hook 320 through a snap structure, so that the torsion spring 400 can provide a biasing force for the latch 300 to move from the unlocked position to the locked position. That is, after the recess 322 is latched onto the locking member 330, the hook 320 will not disengage from the locking member 330; after the recess 322 disengages from the locking member 330, the hook 320 can automatically return to its original position.

[0038] Preferably, it further includes a handle 500 fixedly connected to the hook 320. The handle 500 is for the operator to pull. When an external force is applied to pull the handle 500, the handle 500 drives the hook 320 to rotate, and the latch 300 moves from the locked position to the unlocked position. Specifically, this structure can be used in conjunction with the lower vehicle control valve of the lateral telescopic outrigger. When it is necessary to unlock the telescopic leg 120, the user pulls up the handle 500 and operates the lower vehicle control valve to extend the telescopic leg 120 to complete the extension of the telescopic leg 120; when it is necessary to lock the telescopic leg 120, operate the lower vehicle control valve to retract the telescopic leg 120 to complete the automatic locking of the telescopic leg 120.

[0039] Preferably, the hook 320 is provided with a through hole 323, and the fixing member 310 is provided with a fixing shaft 311. The fixing shaft 311 is rotatably connected in the through hole 323. The torsion spring 400 is sleeved on the fixing member 310. A fixing bolt 312 is connected to the end of the fixing shaft 311. Among them, the fixing bolt 312 is threadedly connected to the fixing shaft 311 for installing the torsion spring 400 and the hook 320.

[0040] Preferably, the fixing member 310 further includes a base 313 and a vertical plate 314. The vertical plate 314 is vertically connected to the base 313, and the vertical plate 314 is fixedly connected to the fixing shaft 311. Among them, the vertical plate 314 and the fixing shaft 311 can be connected by welding.

[0041] Preferably, the fixing member 310 is provided on the vehicle frame 200 / box body 110, and the locking member 330 is provided on the telescopic leg 120, both of which can realize the locking of the telescopic leg 120. Among them, the base 313 can be welded and processed on site with the vehicle frame 200 / box body 110 at the installation site. A protective shell is provided outside the locking member 330, which can prevent the locking member 330 from colliding with the external structure and being damaged.

[0042] As an alternative, the fixing member 310 can also be provided on the telescopic leg 120, and the locking member 330 can also be provided on the vehicle frame 200 / box body 110, and both can also realize the locking of the telescopic leg 120. Among them, the base 313 can be welded and processed on site with the telescopic leg 120 at the installation site.

[0043] In summary, the present invention can improve the safety of the side outriggers of the crane, prevent the side outriggers of the crane from laterally disengaging during stopping or traveling, avoid the increase in the overall width of the crane due to the extension of the side outriggers, prevent collisions in the lateral direction, and improve the safety of the entire crane.

[0044] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and substitutions can be made, and these improvements and substitutions should also be regarded as the protection scope of the present invention.

Claims

1. A lateral safety structure for a crane, characterized in that, Comprising: A lateral telescopic outrigger (100), including a box body (110) and a telescopic leg (120) nested and connected within the box body (110), the telescopic leg (120) having a retracted position where it retracts into the box body (110) along a straight line and an extended position where it extends out of the box body (110); A vehicle frame (200), fixedly connected to the box body (110); A lock (300), arranged between the telescopic leg (120) and the vehicle frame (200) / box body (110) for locking the telescopic leg (120) to the vehicle frame (200) / box body (110), the lock (300) having a locked position where the telescopic leg (120) is connected to the vehicle frame (200) / box body (110) as a whole and an unlocked position where the telescopic leg (120) is separated from the vehicle frame (200) / box body (110); The lock (300) includes a fixing member (310) and a hook (320), the hook (320) being rotatably connected to the fixing member (310), and the hook (320) rotates around the fixing member (310) to move from the locked position to the unlocked position; It further includes a locking member (330), the hook (320) has an inclined surface (322), and a sliding surface is formed on a part of the locking member (330) corresponding to the inclined surface (322), and the sliding surface can squeeze the inclined surface (322) so that the linear motion of the locking member (330) is converted into the rotational motion of the hook (320) around the fixing member (310); The hook (320) has a recess (321), the locking member (330) is rod-shaped, and the recess (321) can be buckled on the outer side wall of the locking member (330). When the recess (321) is buckled with the locking member (330), the lock (300) is in the locked position; When the locking member (330) moves linearly, it drives the hook (320) to rotate, and the hook (320) makes room for the locking member (330). When the locking member (330) moves to the position of the recess (321), the recess (321) is buckled onto the locking member (330), and the lock (300) moves from the unlocked position to the locked position; The fixing member (310) is arranged on the vehicle frame (200) / box body (110), and the locking member (330) is arranged on the telescopic leg (120).

2. The lateral safety structure of the crane according to claim 1, characterized in that, It further includes a torsion spring (400), the torsion spring (400) is elastically connected between the fixing member (310) and the hook (320), and the torsion spring (400) is used to provide a biasing force for the lock (300) to move from the unlocked position to the locked position.

3. The lateral safety structure of a crane according to claim 2, characterized in that It further includes a handle (500) fixedly connected to the hook (320). When the handle (500) is pulled by an external force, the handle (500) drives the hook (320) to rotate, and the lock (300) moves from the locked position to the unlocked position.

4. The lateral safety structure of the crane according to claim 3, characterized in that, The hook (320) is provided with a through hole (323), the fixing member (310) is provided with a fixing shaft (311), the fixing shaft (311) is rotatably connected in the through hole (323), the torsion spring (400) is sleeved on the fixing member (310), and the end of the fixing shaft (311) is connected with a fixing bolt (312).

5. The lateral safety structure of a crane according to claim 4, characterized in that, The fixing member (310) further includes a base (313) and a vertical plate (314), the vertical plate (314) is vertically connected to the base (313), and the vertical plate (314) is fixedly connected to the fixing shaft (311).

6. The lateral safety structure of the crane according to claim 1, characterized in that The fixing member (310) is arranged on the telescopic leg (120), and the locking member (330) is arranged on the vehicle frame (200) / the box body (110).

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