Adjustable hydraulic hook and adjustment method thereof

Abstract

The present invention provides an adjustable hydraulic hook and an adjustment method thereof. The adjustable hydraulic hook comprises: a cylinder; a piston rod extending through both ends of the cylinder; a suspension shaft extending through a through hole of the piston rod and fixedly connected to the piston rod; and a hook mounted at the lower end of the suspension shaft; the position of the lower end of the suspension shaft being adjustable by arc movement. When uneven force is applied to the hook portion of the hook, the lower end of the suspension shaft is moved in an arc to change the hook's tilt angle, raising the lower portion of the hook subject to less force, thereby achieving uniform force application on the hook and avoiding accidents.

Description

Technical Field

[0001] The invention relates to the technical field of lifting equipment, in particular to an adjustable hydraulic hook and an adjustment method thereof. Background Art

[0002] Traditional cranes typically consist of a hoist consisting of a motor, coupling, brake, reducer, and drum assembly, along with a wire rope and hook assembly, forming the lifting mechanism to lift the load. This type of crane has drawbacks such as numerous components, a relatively high failure rate, and a heavy weight, making it unsuitable for low-frequency applications and high-load lifting requirements.

[0003] Large hydraulic hoists are hydraulically controlled and can lift loads through the hoist and steel strands. In theory, they can meet the working requirements of traditional cranes in low-frequency working conditions with high lifting capacity requirements.

[0004] Hydraulic hoists typically lift cargo using a hook. These hooks typically have multiple hooks that form a groove with the hook body for suspending a steel cable. In actual use, uneven force can easily occur on the hooks, leading to accidents. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to solve the technical problem that the conventional hydraulic hoist hook is prone to uneven force.

[0006] The present invention provides an adjustable hydraulic hook, comprising:

[0007] Cylinder body;

[0008] The piston rod passes through both ends of the cylinder;

[0009] A hanging shaft is inserted into the through hole of the piston rod and is fixedly connected to the piston rod;

[0010] A hook, mounted on the lower end of the suspension shaft;

[0011] The position of the lower end of the suspension shaft can be adjusted by moving in an arc.

[0012] When the hook of the hook is unevenly stressed, the lower end of the lifting shaft moves in an arc, which changes the inclination angle of the hook and increases the height of the hook part with less stress, thereby achieving the purpose of uniform stress on the hook and avoiding accidents.

[0013] To illustrate the specific structure of the adjustable lower end of the suspension shaft, in this solution, a gap is provided between the suspension shaft and the through-hole. Its upper end is secured to the upper end of the piston rod via a spherical washer threaded onto a lock nut. Changing the connection between the spherical washer and the piston rod changes the position of the suspension shaft's lower end. The gap between the suspension shaft and the through-hole provides space for the suspension shaft to move in an arc.

[0014] Since the hook is subjected to relatively large forces, when the locking nut is damaged and breaks, the impact force generated is relatively large, which can easily lead to safety accidents. Therefore, further improvements are made to solve this problem. Specifically, a protective frame is included to cover the adjustable hydraulic hook.

[0015] The present invention also provides a method for adjusting an adjustable hydraulic hook, comprising the following steps:

[0016] S1. A plurality of pressure sensors corresponding to the hook parts of the hook are installed at the lower end of the cylinder;

[0017] S2, the force bearing point of the hook portion is threadedly connected to the top rod of the pressure sensor;

[0018] S3, placing the hook on the support base, with the upper end surface of the support base horizontal;

[0019] S4, adjusting the thread depth of the push rod so that the upper end surface of the push rod is flush;

[0020] S5. Oil is supplied to the cylinder to raise the hook, and the push rod applies pressure to the pressure sensor;

[0021] S6. Compare the pressure values ​​of the pressure sensor. If the pressure values ​​are different, adjust the position of the spherical washer to move the lower end of the suspension shaft toward the direction of the smaller pressure value.

[0022] S7. Repeat steps S5 and S6 until the pressure values ​​on the pressure sensors are consistent.

[0023] By adjusting the position of the hook portion through the above method, the purpose of even force on the hook portion is achieved, and the operation is simple and convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention will be further described below with reference to the accompanying drawings and examples.

[0025] Figure 1 It is a structural schematic diagram of the present invention;

[0026] In the figure: 1. Cylinder body; 2. Piston rod; 3. Hanging shaft; 4. Hook; 5. Spherical washer; 6. Lock nut; 7. Pressure sensor; 8. Ejector rod; 9. Support seat; 10. Protective frame; 11. First oil chamber; 12. Second oil chamber; 13. First oil circuit; 14. Second oil circuit; 15. Piston; 21. Through hole; DETAILED DESCRIPTION

[0027] The present invention will now be described in further detail with reference to the accompanying drawings, which are simplified schematic diagrams that illustrate the basic structure of the present invention in a schematic manner.

[0028] Example 1:

[0029] like Figure 1 As shown, the present invention discloses an adjustable hydraulic hook, comprising a cylinder body 1, which is composed of a cylinder barrel, an upper cover plate, and a lower cover plate. A piston rod 2 extends through the cylinder body 1, and a piston 15 is fixedly connected to the piston rod 2. The piston 15 divides the interior of the cylinder body 1 into a first oil chamber 11 and a second oil chamber 12. A first oil passage 13 is provided in the upper cover plate, connecting to the first oil chamber 11, and a second oil passage 14 is provided in the lower cover plate, connecting to the second oil chamber 12.

[0030] The piston rod 2 is provided with an axial through-hole 21, through which a suspension shaft 3 is inserted, with a gap between the suspension shaft 3 and the wall of the through-hole 21. The upper end of the piston rod 2 is provided with an inner chamfer, and a spherical washer 5 is sleeved onto the suspension shaft 3, with its spherical surface tangent to the inner chamfer. The upper end of the suspension shaft 3 is provided with an external thread, and a locking nut 6 is threadedly connected to the upper end of the suspension shaft 3, thereby securing the suspension shaft 3 to the piston rod 2. The position of the lower end of the suspension shaft 3 can be changed by changing the connection position of the spherical washer 5 to the piston rod 2; the gap between the suspension shaft 3 and the through-hole 21 provides space for the lower end of the suspension shaft 3 to move in an arc.

[0031] The hook 4 is installed on the lower end of the hanging shaft 3. The lower end of the hanging shaft 3 passes through the center hole of the hook 4 and is locked and fixed by a nut.

[0032] When the hook portion of the hook 4 is unevenly stressed, the connection position of the spherical washer 5 and the piston rod 2 is changed, thereby changing the inclination angle of the hook 4 and raising the height of the hook portion with less stress, so as to achieve the purpose of uniform stress on the hook portion and avoid accidents.

[0033] Example 2:

[0034] Compared to Example 1, the present invention also includes a protective frame 10 for housing the adjustable hydraulic hook. The protective frame 10 comprises a square top and bottom plate, connected by four support columns. The corresponding sides of the top and bottom plates are connected by side panels. Because the hook 4 is subject to significant force, if the locking nut 6 breaks due to damage, the resulting impact is significant, potentially leading to safety accidents. The protective frame 10 provides protection.

[0035] Example 3:

[0036] According to the first embodiment, the present invention further discloses a method for adjusting an adjustable hydraulic hook, comprising the following steps:

[0037] S1. A plurality of pressure sensors 7 corresponding to the hooks 4 are installed at the lower end of the cylinder 1;

[0038] S2, the force bearing point of the hook 4 is threadedly connected to the top rod 8 facing the pressure sensor 7;

[0039] S3. Place the hook 4 on the support base 9, with the upper end surface of the support base 9 being horizontal;

[0040] S4. Adjust the thread depth of the push rod 8 so that the upper end surface of the push rod 8 is flush;

[0041] S5, hydraulic oil enters the second oil chamber 12 from the second oil passage 13, causing the hook 4 to rise, and the push rod 8 to apply pressure to the pressure sensor 7;

[0042] S6. Compare the pressure values ​​of the pressure sensor 7. If the pressure values ​​are different, adjust the position of the spherical washer 5 so that the lower end of the suspension shaft 3 moves in the direction of the smaller pressure value.

[0043] S7. Repeat steps S5 and S6 until the pressure values ​​on the pressure sensor 7 are consistent.

[0044] By adjusting the position of the hook portion through the above method, the purpose of even force on the hook portion is achieved, and the operation is simple and convenient.

[0045] With the above-described preferred embodiments of the present invention as a guide, and with reference to the above description, relevant personnel are fully capable of making various changes and modifications without departing from the technical scope of this invention. The technical scope of this invention is not limited to the contents of the specification and must be determined according to the scope of the claims.

Claims

1. A method for adjusting an adjustable hydraulic hook, characterized in that: An adjustable hydraulic hook is used, and the adjustable hydraulic hook includes: Cylinder (1); The piston rod (2) passes through both ends of the cylinder body (1); A hanging shaft (3) is inserted into the through hole (21) of the piston rod (2) and is fixedly connected to the piston rod (2); A hook (4) is mounted on the lower end of the suspension shaft (3); The position of the lower end of the suspension shaft (3) can be adjusted by moving in an arc; A distance is provided between the suspension shaft (3) and the through hole (21), and the upper end of the suspension shaft is fixed to the upper end of the piston rod (2) by means of a sleeve-engaged spherical washer (5) and a threaded locking nut (6); The adjustable hydraulic hook comprises a protection frame (10) for covering the adjustable hydraulic hook; The following steps are involved: S1. A plurality of pressure sensors (7) corresponding to the hooks of the hooks (4) are installed at the lower end of the cylinder (1); S2, the force bearing point of the hook portion of the hook (4) is threadedly connected to the top rod (8) facing the pressure sensor (7); S3, placing the hook (4) on the support base (9), with the upper end surface of the support base (9) being horizontal; S4, adjusting the thread depth of the push rod (8) so that the upper end surface of the push rod (8) is flush; S5, oil is supplied into the cylinder (1), so that the hook (4) rises, and the push rod (8) applies pressure to the pressure sensor (7); S6. Compare the pressure values ​​of the pressure sensor (7). If the pressure values ​​are different, adjust the position of the spherical washer (5) so that the lower end of the suspension shaft (3) moves in the direction of the smaller pressure value. S7, repeat steps S5 and S6 until the pressure values ​​on the pressure sensor (7) are consistent.

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