Double-insurance anti-falling quick-release connecting device of excavator

Abstract

A double-insurance anti-falling quick-release connecting device of an excavator comprises a shell, a fixed hook is arranged at the lower end of the shell, a movable hook is rotationally connected to the shell, a hydraulic cylinder is arranged in the shell, a movable shaft and a connecting shaft are arranged on the movable hook, and a gravity block used for blocking an opening of the movable hook from the front side is rotationally installed on the movable shaft. The connecting shaft is rotationally connected with a hydraulic rod of a hydraulic cylinder, a cylinder head is installed at the rear end of a cylinder body of the hydraulic cylinder, a through groove is formed in the cylinder head, and a second pin shaft fixedly arranged on the shell is in sliding fit with the through groove; the cylinder head is provided with a connecting rod, the shell is further rotationally connected with a check block, the check block is rotationally connected with a connecting hook, the connecting hook is connected with the connecting rod located on the front side in a hooked mode, and a reset mechanism is further installed on the shell. Equipment required by excavator construction is loaded and unloaded through hydraulic control, meanwhile, the anti-falling locking mechanism is arranged, the equipment can be prevented from falling off accidentally, and the safety of the operation process is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of excavator connecting devices, specifically to a kind of excavator double safety anti-falling quick-release connecting device. BACKGROUND

[0002] Excavator is one of the most important engineering machinery at present, the principle of excavator work is that mechanical arm drives shovel to carry out construction work, and the mechanical arm and shovel of excavator need to be connected using connecting device.

[0003] In use, different shovels need to be replaced for different working environments, for this reason, the person skilled in the art has developed a connecting device for realizing quick connection of the end of mechanical arm with shovel, breaking hammer and other tools, which has a fixed hook and a movable hook, and the movable hook is driven to rotate by a hydraulic cylinder to hang the two mounting rods of the tool on the two hook bodies respectively. However, in actual use, once the hydraulic cylinder has insufficient oil pressure, the movable hook will loosen, causing the connected tool to fall off unexpectedly and causing safety accidents. SUMMARY

[0004] The utility model provides a kind of excavator double safety anti-falling quick-release connecting device, and the purpose is to prevent the connected tool from falling off unexpectedly.

[0005] The technical mode of the utility model is as follows:

[0006] A kind of excavator double safety anti-falling quick-release connecting device, including shell, the lower end of the shell is provided with fixed hook, the shell is rotatably connected with movable hook, movable hook is located in the front side of fixed hook, and the opening direction is opposite to fixed hook, and the shell is also provided with hydraulic cylinder for pushing movable hook, characterized by: movable hook is provided with movable shaft and connecting shaft, gravity block for blocking the opening of movable hook from the front side is rotatably installed on the movable shaft;Connecting shaft is rotatably connected with the hydraulic rod of hydraulic cylinder;The rear end of the cylinder body of the hydraulic cylinder is provided with cylinder head, and the cylinder head is provided with through slot, and the second pin shaft fixedly arranged on the shell is slidably connected with the through slot;Connecting rod is also provided on the cylinder head;The shell is also rotatably connected with stop block, and the connecting hook is rotatably connected with the connecting hook on the stop block, and the connecting hook is hooked with the connecting rod on the front side, and the shell is also provided with reset mechanism for pushing fixed block to rotate to block the opening of fixed hook from the rear side.

[0007] Further, the gravity block is L-shaped, divided into counterweight part and locking part, the counterweight part is above the movable shaft side, and in contact with connecting shaft, the center of gravity of the gravity block is on the counterweight part, and the locking part of the gravity block blocks the opening of movable hook from the front side.

[0008] Further, the stop block is rotatably connected with the shell through a third pin shaft, and the reset mechanism is a torsion spring which is sleeved on the third pin shaft.

[0009] Further, a mechanical arm mounting hole is arranged on the shell

[0010] Further, a hook for hoisting is arranged on the shell.

[0011] The L-shaped gravity block at the front end of the utility model cooperates with the movable hook, and the stop block at the rear end cooperates with the fixed hook, so that double locking of the front and rear mounting rods is realized, the accidental falling of the bucket is prevented, and the safety of the construction site is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is a three-dimensional structure schematic view of the utility model;

[0013] Figure 2 It is an internal structure schematic view of the utility model;

[0014] Figure 3 It is a cross-section structure schematic view when the utility model is locked;

[0015] Figure 4 It is a cross-section structure schematic view when the utility model is unlocked;

[0016] In the drawing: 1. Shell; 1-1. Mechanical arm mounting hole; 1-2. Hook; 2. Fixed hook; 3. Movable hook; 3-1. Movable shaft; 3-2. Connecting shaft; 3-3. Gravity block; 4. First pin shaft; 5. Second pin shaft; 6. Third pin shaft; 7. Hydraulic cylinder; 7-1. Hydraulic rod; 8. Cylinder head; 8-1 Connecting rod; 8-2. Through slot; 9. Connecting hook; 10. Stop block; 10-1. Torsion spring; 11. Front mounting rod; 12. Rear mounting rod. DETAILED DESCRIPTION

[0017] The technical scheme of the utility model will be described in detail below in combination with the drawings:

[0018] For example, Figure 1 And Figure 2The utility model provides a double insurance anti -drop quick detachable connecting device of excavator, including casing 1, mechanical arm mounting hole 1-1 and hook 1-2 are provided on casing 1, mechanical arm mounting hole 1-1 is used to realize the mechanical connection with mechanical arm, the hook 1-2 is used for hoisting when installing the connecting device, the lower part in casing 1 is provided with the fixed hook 2 of opening rear, the fixed hook 2 is used for hanging the rear mounting rod 12 of tool, the first pin shaft 4, second pin shaft 5 and third pin shaft 6 are fixedly installed in casing 1, the inside of casing 1 is also provided with locking mechanism, locking mechanism includes movable hook 3 and hydraulic cylinder 7, movable hook 3 is located in the front of fixed hook 2, movable hook 3 opening forward is used for hanging the front mounting rod 11 of tool, movable hook 3 is rotatably connected with casing 1 through first pin shaft 4, movable hook 3 is provided with movable shaft 3-1 and connecting shaft 3-2, rotatable gravity block 3-3 is installed on movable shaft 3-1, and gravity block 3-3 is used to stop the opening of movable hook 3 from the front side.

[0019] Specifically, as Figure 3 The gravity block 3-3 is an L-shaped structure composed of a counterweight part and a locking part, the counterweight part is connected to the upper side of the connecting shaft 3-2, the center of gravity of the gravity block 3-3 is located on the counterweight part, the locking part is located below the connecting shaft 3-2, the locking part is opposite to the opening of the movable hook 3, after the front mounting rod 11 is installed, the counterweight part of the gravity block 3-3 contacts the connecting shaft 3-2 under the influence of gravity, limiting the clockwise rotation of the gravity block 3-3, the locking part of the gravity block 3-3 will contact the front mounting rod 11, the locking part cooperates with the movable hook 3 to limit the movement range of the mounting rod 11, thereby achieving the purpose of preventing the front mounting rod 11 from falling out of the movable hook 3.

[0020] The hydraulic cylinder 7-1 of the hydraulic cylinder 7 is rotatably connected with the connecting shaft 3-2, the rear end of the cylinder body of the hydraulic cylinder 7 is provided with a cylinder head 8, a through slot 8-2 is formed in the cylinder head 8, and the second pin shaft 5 is located in the through slot 8-2. The cylinder head 8 is also provided with a connecting rod 8-1.

[0021] The locking mechanism further includes a fixed block 10, the fixed block 10 is rotatably connected with the casing 1 through the third pin shaft 6, and the fixed block 10 is also rotatably connected with a connecting hook 9, the connecting hook 9 is hooked with the connecting rod 8-1.

[0022] The third pin shaft 6 is also sleeved with a torsional spring 10-1, the torsional spring 10-1 is sleeved on the third pin shaft 6, one side of the torsional spring 10-1 is in contact with the casing 1, and the other side is in contact with the stop block 10, for pushing the stop block 10 to rotate counterclockwise, for blocking the opening of the fixed hook 2 from the rear side, achieving the purpose of preventing the rear mounting rod 12 of the equipment from falling out of the fixed hook 2.

[0023] When using the device to connect tools,Figure 3 , first, the device is placed horizontally, retract the hydraulic cylinder 7, at this time the hydraulic rod 7-1 will drive the movable hook 3 counterclockwise rotation around the first pin shaft 4, while the cylinder head 8 will extend through the slot 8-2 direction forward, and through the connecting rod 8-1 and connecting hook 9 drive the block 10 to overcome the torsional spring 10-1 force clockwise rotation around the third pin shaft 6, and then open the opening at the fixed hook 2. Then move the mechanical arm, so that the fixed hook 2 hook the tool rear mounting rod 12, adjust the angle of the device, the movable hook 3 aligns with the front mounting rod 11. Then extend the hydraulic cylinder 7, at this time the hydraulic rod 7-1 will drive the movable hook 3 clockwise rotation, so that the tool front mounting rod 11 counterclockwise push away the gravity block 3-3, card into the movable hook 3, then the gravity block 3-3 under the force of gravity clockwise rotation down, the counterweight part of the gravity block 3-3 and the connecting shaft 3-2 contact to limit, the locking portion will contact with the front mounting rod 11, block the front mounting rod 11, realize the front end of the lock, while the cylinder head 8 moves back until the front end of the through slot 8-2 touches the second pin shaft 5, the cylinder head 8 moves during the process, resulting in the connecting rod 8-1 fall, the block 10 counterclockwise rotation under the action of the torsional spring 10-1, so that its lower end block the rear mounting rod 12 to realize the rear end of the lock.

[0024] In use, the device is in a near horizontal state, even if the oil pressure in the hydraulic cylinder 7 is insufficient, the locking function of the front and rear ends is still effective, which can prevent the tool from falling off. Specifically: if the front mounting rod 11 is subject to external forces and has a tendency to fall off, the front mounting rod 11 will touch the locking portion to make the gravity block 3-3 have a tendency to rotate clockwise, and the gravity block 3-3 cannot rotate at this time due to the blocking of the connecting shaft 3-2, so the front mounting rod 11 cannot fall off. If the rear mounting rod 12 has a tendency to move backward and fall off under the action of external force, the rear mounting rod will push the block 10 counterclockwise, at this time the block 10 will pull the cylinder head 8 backward through the connecting hook 9 and the connecting rod 8-1, and since the front end of the through slot 8-2 on the cylinder head 8 is in contact with the second pin shaft 5, the cylinder head 8 cannot move backward, so the rear mounting rod 12 cannot push away the block 10 to fall off.

[0025] When unloading the tool, first operate the excavator mechanical arm to change the device to a vertical state, the front end downward, then retract the hydraulic cylinder 7, so that the movable hook 3 away from the front mounting rod 11, such as Figure 4As the center of gravity of the gravity block 3-3 is located on the counterweight part, the counterweight part drives the gravity block 3-3 to rotate counterclockwise under the influence of gravity, so that the locking part moves away from the position where the front mounting rod 11 is located until it contacts the connecting shaft 3-2, thereby releasing the locking of the front mounting rod 11. At the same time, as the hydraulic cylinder 7 contracts, the cylinder head 8 moves forward, pulls the stop block 10 through the connecting rod 8-1 and the connecting hook 9 to overcome the elastic force of the torsional spring 10-1 and rotate clockwise, thereby opening the opening at the fixed hook 2. At this time, the tool is only hung on the fixed hook 2 by the rear mounting rod 12. Then the mechanical arm is lowered, so that the tool falls to the ground. Finally, the mechanical arm is moved to make the fixed hook 2 away from the rear mounting rod 12, and the unloading is completed.

Claims

1. A double safety anti-falling quick release connection device for excavators, comprising a housing (1), a fixed hook (2) is arranged at the lower end of the housing (1), a movable hook (3) is rotatably connected to the upper end of the housing (1), the movable hook (3) is located at the front side of the fixed hook (2) and the opening direction of the movable hook (3) is opposite to that of the fixed hook (2), a hydraulic cylinder (7) for pushing the movable hook (3) is further arranged in the housing (1), characterized in that: The movable hook (3) is provided with a movable shaft (3-1) and a connecting shaft (3-2), the movable shaft (3-1) is rotatably provided with a gravity block (3-3) for blocking the opening of the movable hook (3) from the front side; the connecting shaft (3-2) is rotatably connected with the hydraulic rod (7-1) of the hydraulic cylinder (7); the rear end of the cylinder body of the hydraulic cylinder (7) is provided with a cylinder head (8), the cylinder head (8) is provided with a through slot (8-2), the second pin shaft (5) fixedly arranged on the shell (1) is in sliding fit with the through slot (8-2); the cylinder head (8) is further provided with a connecting rod (8-1); the shell is further rotatably provided with a stop block (10), the stop block (10) is rotatably provided with a connecting hook (9), the connecting hook (9) is hooked with the connecting rod (8-1) located on the front side, and the shell is further provided with a reset mechanism for pushing the fixed block to rotate and block the opening of the fixed hook (2) from the rear side. ​ 2. The dual safety anti-drop quick release connecting device of claim 1, wherein: The gravity block (3-3) is L-shaped and is divided into a counterweight part and a locking part, the counterweight part is located above the movable shaft (3-1) side and is in contact with the connecting shaft (3-2), the center of gravity of the gravity block (3-3) is located on the counterweight part, and the locking part of the gravity block (3-3) blocks the opening of the movable hook (3) from the front side.

3. The excavator double-safety anti-detachment quick-release connection device as described in claim 1, characterized in that: The stop block (10) is rotatably connected with the shell through the third pin shaft (6), and the reset mechanism is a torsion spring which is sleeved on the third pin shaft (6).

4. The dual safety anti-drop quick release connecting device of claim 1, wherein: The shell (1) is provided with a mechanical arm mounting hole (1-1).

5. The excavator double-safety anti-detachment quick-release connection device as described in claim 1, characterized in that: The shell (1) is provided with a hook (1-2) for hoisting.

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