Pipe grabbing fork with additional fork tooth overturning function

Abstract

The utility model discloses a pipe grabbing fork with an additional fork tooth overturning function, and belongs to the technical field of engineering machinery. The pipe grabbing fork overcomes the defects that in the prior art, due to the fact that fork teeth of a traditional pipe grabbing fork are long, the length of a whole machine is increased, the passing radius is increased, and the passing ability of the whole machine and the traveling safety in the transition operation process are reduced. The main body structure comprises a lower grabber, an upper grabber, a fork frame and fork teeth, the lower grabber is hinged to the upper grabber, and a lower grabber oil cylinder is arranged between the lower grabber and the upper grabber; the fork frame is respectively hinged with the upper grabber and the fork teeth, an upper grabber oil cylinder is arranged between the upper grabber and the fork frame, and any one of the lower grabber, the upper grabber and the fork teeth is detachably connected with a connecting pull rod. The utility model is mainly applied to engineering machinery such as excavators and the like.

Description

Technical Field

[0001] The utility model belongs to the technical field of construction machinery, and more specifically, it relates to a pipe-grabbing fork with an increased fork tooth flipping function. Background Art

[0002] In oilfield working conditions, there are often materials such as oil pipes, maintenance equipment, and containers that need to be loaded, unloaded, and transported. It is necessary to develop a loader tool that can adapt to various materials. Traditional pipe-grabbing forks usually consist of fork arms with a fixed structure. Although they can meet the basic grasping and handling requirements, there are certain limitations and deficiencies in actual applications: Since materials such as containers and maintenance equipment have a relatively large width, in order to ensure stable operation and prevent the materials from falling off, the fork teeth are generally relatively long, which increases the overall length of the machine, enlarges the turning radius, and reduces the overall passability of the machine and the driving safety during the transfer operation. Content of the Utility Model

[0003] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a pipe-grabbing fork with an increased fork tooth flipping function.

[0004] In order to achieve the above object, the utility model is realized by adopting the following technical solutions:

[0005] A pipe-grabbing fork with an increased fork tooth flipping function includes a lower grab, an upper grab, a fork frame, and fork teeth. The lower grab is hinged to the upper grab, and a lower grab oil cylinder is arranged between the lower grab and the upper grab; the fork frame is respectively hinged to the upper grab and the fork teeth, and an upper grab oil cylinder is arranged between the upper grab and the fork frame. A connecting pull rod is detachably connected to any one of the lower grab, the upper grab, and the fork teeth.

[0006] Preferably, the connecting pull rod is detachably connected to the lower grab, and mounting holes one and two for placing the connecting pull rod are arranged on the lower grab.

[0007] Preferably, mounting hole three is arranged on the fork teeth. When the fork teeth flip, both ends of the connecting pull rod are respectively connected to mounting hole one and mounting hole three through fasteners.

[0008] Preferably, the lower grab includes two vertical plates, and the two vertical plates are connected by a cover plate. Mounting holes one and two are arranged on one of the vertical plates.

[0009] Preferably, the lower grab is hinged to the upper grab through a pin four.

[0010] Preferably, the fork frame is hinged to the fork teeth through a pin two.

[0011] Preferably, the upper grab is hinged to the fork frame through a pin one. After the fork teeth flipping is completed, a pin three is further arranged between the upper grab and the fork frame.

[0012] Preferably, the first mounting hole, the second mounting hole, and the third mounting hole are all threaded holes, and the fastener is a bolt-nut assembly.

[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0014] 1. By detachably connecting a connecting pull rod to any one of the lower grab, the upper grab, and the fork teeth, during normal pipe clamping operations and fork loading operations, the connecting pull rod 1 is fixed to the lower grab, the upper grab, and the fork teeth by bolts, without affecting the operations.

[0015] 2. The first mounting hole and the second mounting hole on the lower grab provide fixed points for the connecting pull rod, enhancing the structural stability and connection reliability. At the same time, it also facilitates the quick installation and disassembly of the connecting pull rod, improving the maintenance efficiency.

[0016] 3. By connecting the connecting pull rod to the first mounting hole and the third mounting hole with fasteners, the stability during the flipping process of the fork teeth is ensured, avoiding safety risks caused by loose connections during the work process. At the same time, the operation process of flipping the fork teeth is simplified.

[0017] 4. The lower grab adopts the structure of a vertical plate and a cover plate, which not only increases the strength of the overall structure but also provides a stable support for the mounting holes, reducing the risk of damage caused by stress concentration during use.

[0018] 5. The setting of the third pin shaft restricts the extra movement of the upper grab after the fork teeth are flipped, effectively preventing unnecessary vibrations of the upper grab during the work process and ensuring the smoothness and safety of the operation.

[0019] 6. Designing the mounting holes as threaded holes facilitates quick connection through fasteners such as bolts. It not only simplifies the installation steps but also improves the tightness and stability of the connection, reducing the maintenance cost. At the same time, it is easy to replace through fasteners such as bolts and nuts, facilitating daily maintenance.

[0020] In summary, by adding a connecting pull rod, the present utility model rotates the fork teeth from parallel to the ground to about 90 degrees with the ground, effectively reducing the overall length of the machine, decreasing the passing radius of the machine, enabling the driver to see the erected fork teeth, and enhancing the safety during the driving process. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a structural schematic diagram of the present utility model;

[0022] Figure 2 is a front view of the present utility model;

[0023] Figure 3 is a structural schematic diagram of the lower grab in the present utility model;

[0024] Figure 4Schematic structural diagram of the fork teeth in the present utility model;

[0025] Figure 5 State diagram of the fork teeth in motion in the present utility model;

[0026] Figure 6 Schematic diagram of reducing the radius in the present utility model.

[0027] In the figure: 1. Connecting pull rod; 2. Lower gripper; 3. Lower gripper oil cylinder; 4. Upper gripper; 5. Upper gripper oil cylinder; 6. Pin three; 7. Pin one; 8. Fork frame; 9. Pin two; 10. Fork teeth; 11. Pin four; 21. Vertical plate; 22. Cover plate; 23. Fitting plate; 24. Mounting hole one; 25. Mounting hole two; 101. Mounting hole three. Specific implementation mode

[0028] The present utility model will be further described below through specific embodiments in conjunction with the accompanying drawings.

[0029] Embodiment 1:

[0030] As Figure 1-2 shown, a pipe-gripping fork with an increased fork-tooth flipping function includes a lower gripper 2, an upper gripper 4, a fork frame 8, and fork teeth 10. The lower gripper 2 is hinged to the upper gripper 4, and a lower gripper oil cylinder 3 is provided between the lower gripper 2 and the upper gripper 4. The fork frame 8 is respectively hinged to the upper gripper 4 and the fork teeth 10, and an upper gripper oil cylinder 5 is provided between the upper gripper 4 and the fork frame 8. A connecting pull rod 1 is detachably connected to any one of the lower gripper 2, the upper gripper 4, and the fork teeth 10.

[0031] Embodiment 2:

[0032] As Figure 3 shown, a pipe-gripping fork with an increased fork-tooth flipping function, different from Embodiment 1, is that a connecting pull rod 1 is detachably connected to the lower gripper 2, and mounting holes one 24 and two 25 for placing the connecting pull rod 1 are provided on the lower gripper 2. In this embodiment, during normal pipe-gripping operations and fork-loading operations, the connecting pull rod 1 is fixed to the vertical plate 21 through bolts, mounting hole one 24, and mounting hole two 25, without affecting the operation.

[0033] As Figure 4 shown, mounting hole three 101 is provided on the fork teeth 10. When the fork teeth 10 flip, both ends of the connecting pull rod 1 are respectively connected to mounting hole one 24 and mounting hole three 101 through fasteners.

[0034] Again, as Figure 3As shown in the figure, the lower gripper 2 includes two vertical plates 21, which are connected by a cover plate 22. The first mounting hole 24 and the second mounting hole 25 are arranged on one of the vertical plates 21. A disc 23 is also arranged on the inner sides of the two vertical plates 21 to increase the fastening degree during the connection of the fourth pin 11 and reduce the wear on the inner sides of the two vertical plates 21.

[0035] Further, the lower gripper 2 is hingedly connected to the upper gripper 4 through the fourth pin 11. The fork bracket 8 is hingedly connected to the fork teeth 10 through the second pin 9. The upper gripper 4 is hingedly connected to the fork bracket 8 through the first pin 7. After the fork teeth 10 are flipped, a third pin 6 for restricting the oscillation of the upper gripper 4 is also arranged between the upper gripper 4 and the fork bracket 8, as Figure 5 shown in the figure. The upper gripper 4 is mechanically limited by the third pin 6 to avoid overloading the upper gripper cylinder 5.

[0036] Further, the first mounting hole 24, the second mounting hole 25 and the third mounting hole 101 are all threaded holes, and the fastener is a bolt-nut assembly.

[0037] The working principle of the present utility model is as follows:

[0038] In the present utility model, by adding a connecting rod 1, the fork teeth 10 and the lower gripper 2 are rigidly connected. During the movement of the upper gripper 4 and the lower gripper 2, the connecting rod 1 drives the fork teeth 10 to rotate upward around the second pin 9, as Figure 5 shown in the figure. When the lower gripper cylinder 3 contracts, the lower gripper 2 fits with the upper gripper 4. One end of the connecting rod 1 is connected to the first mounting hole 24 on the lower gripper 2 through a bolt, and the other end is connected to the third mounting hole 101 on the fork teeth 10 through a bolt. During the movement process, the length of the lower gripper cylinder 3 remains unchanged. The upper gripper cylinder 5 contracts to drive the upper gripper 4, the lower gripper 2, and the connecting rod 1 to rotate around the first pin 7. The connecting rod 1 drives the fork teeth 10 to rotate around the second pin 9, and finally the purpose of reducing the overall length of the machine by flipping the fork teeth 10 is achieved. After the fork teeth 10 are flipped, by adding the third pin 6, the upper gripper 4 is mechanically limited to prevent potential safety hazards caused by the oscillation of the fork teeth 10 during driving.

[0039] As Figure 6 shown in the figure for the schematic diagram of the reduction of the radius of the present utility model, R2 is the passing radius before the fork teeth 10 are flipped, and R1 is the passing radius after the fork teeth 10 are flipped. It reduces the overall length of the machine, decreases the passing radius, optimizes the driver's vision, and improves the driving safety.

Claims

1. A pipe grab fork with a fork tine flipping function, characterized in that: The invention comprises a lower gripper (2), an upper gripper (4), a fork frame (8) and a fork tooth (10); the lower gripper (2) is hingedly connected to the upper gripper (4), and a lower gripper oil cylinder (3) is arranged between the lower gripper (2) and the upper gripper (4); the fork frame (8) is hingedly connected to the upper gripper (4) and the fork tooth (10), and an upper gripper oil cylinder (5) is arranged between the upper gripper (4) and the fork frame (8); and a connecting rod (1) is detachably connected to any one of the lower gripper (2), the upper gripper (4) and the fork tooth (10).

2. The pipe grab fork with fork tine flipping function according to claim 1, characterized in that: The lower grip (2) is detachably connected to a connecting rod (1), and the lower grip (2) is provided with a first mounting hole (24) and a second mounting hole (25) for placing the connecting rod (1).

3. The pipe grab fork with fork tine flipping function according to claim 2, characterized in that: The fork tine (10) is provided with a mounting hole three (101), and when the fork tine (10) is turned over, the two ends of the connecting rod (1) are respectively connected to the mounting hole one (24) and the mounting hole three (101) through fasteners.

4. The pipe grab fork with fork tine flipping function according to claim 2, characterized in that: The lower grip (2) comprises two vertical plates (21), the two vertical plates (21) are connected via a cover plate (22), and a first mounting hole (24) and a second mounting hole (25) are arranged on one of the vertical plates (21).

5. The pipe grab fork with fork tine flipping function according to any one of claims 1 to 4, characterized in that: The lower grip (2) is hingedly connected to the upper grip (4) via a pin shaft four (11).

6. The pipe grab fork with fork tine flipping function according to claim 5, characterized in that: The fork frame (8) is hingedly connected to the fork teeth (10) via a second pin shaft (9).

7. The pipe grab fork with fork tine flipping function according to claim 6, characterized in that: The upper gripper (4) is hingedly connected to the fork frame (8) via a pin shaft 1 (7). When the fork teeth (10) are flipped over, a pin shaft 3 (6) is further provided between the upper gripper (4) and the fork frame (8).

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