Lifting hook self-locking mechanism of bridge crane

Abstract

The utility model discloses a lifting hook self-locking mechanism of a bridge crane, particularly relates to the technical field of bridge cranes, and comprises a fixed arm, a connecting arm is arranged at the bottom end of the fixed arm, and a hook body is connected to the bottom end of the connecting arm; the locking arm is arranged on one side of the top end of the hook body, a storage cavity facing the locking arm is formed in the side wall of the top end of the hook body, and an arc-shaped sliding strip is slidably connected to the interior of the storage cavity; the locking arm is arranged on one side of the hook body and matched with the arc-shaped sliding strip, the containing cavity, the arc-shaped toothed plate, the gear and other structures, the locking arm can drive the arc-shaped sliding strip to stretch out of the containing cavity and abut against the end of the hook body, and therefore the opening of the hook body can be completely closed, and the lifting hook is firmly locked; the locking arm can drive the arc-shaped sliding strip to retract into the containing cavity again, so that unlocking is fast, operation is easy and convenient, stability and reliability are achieved, and the using effect of the device is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of bridge cranes, in particular to a hook self-locking mechanism of a bridge crane. Background Art

[0002] A bridge crane is a lifting device that is horizontally mounted above a workshop, warehouse, or material yard to lift materials. Because its two ends are located on tall concrete columns or metal brackets, it looks like a bridge. The bridge of a bridge crane runs longitudinally along the tracks laid on the elevated platforms on both sides, making full use of the space under the bridge to lift materials without being hindered by ground equipment. It is the most widely used and most numerous type of lifting machinery.

[0003] At present, when the hook of a bridge crane is in use, in order to prevent the cargo from falling off during lifting, a locking structure is usually set on the hook to close the opening, thereby ensuring the safety of lifting. However, when the existing self-locking mechanism is actually used, the locking structure is often closed or opened by the spring, and its own stability is poor, and it is very easy to cause unlocking, and the self-locking function is not good, which greatly affects the use effect of the hook. Utility Model Content

[0004] The purpose of the utility model is to provide a self-locking mechanism for the hook of a bridge crane, by arranging a locking arm on one side of the hook body, and cooperating with structures such as an arc-shaped slide bar, a storage cavity, an arc-shaped tooth plate and a gear, the locking arm can drive the arc-shaped slide bar to extend out from the storage cavity and abut against the end of the hook body, so that the opening of the hook body can be completely closed to achieve a firm locking of the hook, conversely, the locking arm can drive the arc-shaped slide bar to retract into the storage cavity, so as to quickly unlock the hook, the operation is simple and convenient, and the device is stable and reliable, which greatly improves the use effect of the device to solve the above-mentioned deficiencies in the technology.

[0005] In order to achieve the above-mentioned purpose, the utility model provides the following technical solution: a self-locking mechanism for a hook of a bridge crane, comprising:

[0006] A fixed arm, wherein a connecting arm is disposed at the bottom end of the fixed arm, and a hook body is connected to the bottom end of the connecting arm;

[0007] A locking arm, the locking arm is arranged at one side of the top end of the hook body, the top end side wall of the hook body is provided with a storage cavity facing the locking arm, the interior of the storage cavity is slidably connected with an arc-shaped slide bar, one side of the arc-shaped slide bar extends out of the storage cavity and is fixedly connected to the locking arm;

[0008] A driving assembly includes a connecting shaft rotatably connected to the side wall of the bottom end of the connecting arm through a bearing, a gear is fixed to one end of the connecting shaft, and an arc-shaped tooth plate is arranged on the top side of the locking arm, and the arc-shaped tooth plate is meshed with the gear.

[0009] Preferably, a slot is formed at one end of the hook body relative to the connecting arm, and one end of the arc-shaped slide bar can be inserted into the slot.

[0010] Preferably, a reinforcement frame is fixed to the bottom side wall of the hook body close to the lower side of the locking arm, a positioning block is fixed to one end of the locking arm relative to the reinforcement frame, and a positioning groove is formed at one end of the reinforcement frame facing the positioning block.

[0011] Preferably, the longitudinal section of the arc-shaped slide bar is a T-shaped structure.

[0012] Preferably, the driving assembly further comprises a driving motor, which is fixedly connected to a side of the connecting arm relative to the gear, and an output end of the driving motor passes through the connecting arm and is connected to the connecting shaft.

[0013] Preferably, a protective cover is provided on the outer wall of the driving motor.

[0014] Preferably, an arc-shaped groove is formed on the outer side of the locking arm, and the arc-shaped tooth plate is embedded in the arc-shaped groove.

[0015] In the above technical solution, the technical effects and advantages provided by the utility model are:

[0016] 1. By arranging a locking arm on one side of the hook body, and cooperating with the arc-shaped slide bar, storage cavity, arc-shaped tooth plate and gear and other structures, the locking arm can drive the arc-shaped slide bar to extend out from the storage cavity and abut against the end of the hook body, so that the opening of the hook body can be completely closed to achieve a firm locking of the hook. Conversely, the locking arm can drive the arc-shaped slide bar to retract into the storage cavity, so as to quickly unlock the hook. The operation is simple and convenient, stable and reliable, and greatly improves the use effect of the device;

[0017] 2. By setting a slot at the end of the hook body, the end of the arc-shaped slide bar can be inserted into the slot when the hook is self-locking, and in combination with the reinforcement frame, positioning block and positioning slot, the locking arm and the arc-shaped slide bar can be further firmly locked at the opening of the hook body, thereby greatly strengthening the connection strength between the components and enhancing stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present utility model. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0020] Figure 2 This is a schematic diagram of the structure of the hook body of the utility model after self-locking;

[0021] Figure 3 This is a schematic diagram of the internal structure of the hook body of the utility model;

[0022] Figure 4 This is a schematic diagram of the connection structure between the locking arm and the arc-shaped slide bar of the utility model;

[0023] Figure 5 It is a schematic diagram of the internal structure of the protective cover of the utility model.

[0024] Description of reference numerals:

[0025] 1. Fixed arm; 2. Connecting arm; 3. Hook body; 4. Reinforcement frame; 5. Locking arm; 6. Positioning block; 7. Positioning slot; 8. Storage cavity; 9. Arc-shaped slide bar; 10. Card slot; 11. Connecting shaft; 12. Gear; 13. Arc-shaped tooth plate; 14. Driving motor; 15. Protective cover. DETAILED DESCRIPTION

[0026] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0027] The utility model provides Figure 1-Figure 5 A hook self-locking mechanism of a bridge crane is shown, comprising:

[0028] A fixed arm 1, a connecting arm 2 is provided at the bottom end of the fixed arm 1, and a hook body 3 is connected to the bottom end of the connecting arm 2;

[0029] The locking arm 5 is arranged at one side of the top end of the hook body 3. The top side wall of the hook body 3 is provided with a storage cavity 8 facing the locking arm 5. The interior of the storage cavity 8 is slidably connected with an arc-shaped slide bar 9. One side of the arc-shaped slide bar 9 extends to the outside of the storage cavity 8 and is fixedly connected to the locking arm 5.

[0030] The longitudinal section of the arc-shaped slide bar 9 is a T-shaped structure. The T-shaped structure can prevent the arc-shaped slide bar 9 from escaping from one side of the storage cavity 8.

[0031] The driving assembly includes a connecting shaft 11 rotatably connected to the side wall of the bottom end of the connecting arm 2 through a bearing, a gear 12 is fixed to one end of the connecting shaft 11, and an arc-shaped tooth plate 13 is provided on the top side of the locking arm 5, and the arc-shaped tooth plate 13 is meshed with the gear 12.

[0032] The driving assembly further includes a driving motor 14 , which is fixedly connected to a side of the connecting arm 2 opposite to the gear 12 , and an output end of the driving motor 14 passes through the connecting arm 2 and is connected to the connecting shaft 11 .

[0033] When in use, the connecting shaft 11 can be driven to rotate by the driving motor 14, so that the connecting shaft 11 drives the gear 12 to rotate, and then the gear 12 drives the meshing arc-shaped toothed plate 13 to move, so that the arc-shaped toothed plate 13 drives the locking arm 5 to move, and then the locking arm 5 drives the arc-shaped slide bar 9 to slide in the storage cavity 8, so that the locking arm 5 drives the arc-shaped slide bar 9 to extend out of the storage cavity 8 and abut against the end of the hook body 3, so that the opening of the hook body 3 can be completely closed to achieve a firm locking of the hook;

[0034] On the contrary, by driving the gear 12 to rotate in the opposite direction through the driving motor 14, the arc-shaped slide bar 9 can be retracted into the storage cavity 8, thereby controlling the locking arm 5 to reset and fully open the opening, thereby unlocking the locking of the hook body 3. The operation is simple and convenient, stable and reliable, and greatly improves the use effect of the device.

[0035] The outer wall of the driving motor 14 is provided with a protective cover 15. The driving motor 14 can be protected by the protective cover 15.

[0036] A slot 10 is formed at one end of the hook body 3 relative to the connecting arm 2 , and one end of the arc-shaped slide bar 9 can be inserted into the slot 10 .

[0037] A reinforcing frame 4 is fixed to the bottom side wall of the hook body 3 near the bottom of the locking arm 5 . A positioning block 6 is fixed to one end of the locking arm 5 relative to the reinforcing frame 4 . A positioning groove 7 facing the positioning block 6 is formed at one end of the reinforcing frame 4 .

[0038] By providing the card slot 10, when the hook is self-locking, the end of the arc-shaped slide bar 9 can be inserted into the card slot 10 at the end of the hook body 3, and at the same time, the positioning block 6 on the locking arm 5 is inserted into the positioning slot 7 on the reinforcement frame 4, so that the locking arm 5 and the arc-shaped slide bar 9 can be further firmly locked at the opening of the hook body 3, thereby greatly strengthening the connection strength between the components and improving the stability.

[0039] The outer side of the locking arm 5 is provided with an arc groove, and the arc tooth plate 13 is embedded in the arc groove. The arc tooth plate 13 can be stored through the arc groove, and the aesthetics is enhanced.

[0040] The above only describes some exemplary embodiments of the present invention by way of illustration. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A self-locking mechanism for a hook of a bridge crane, characterized in that: include; A fixed arm (1), wherein a connecting arm (2) is provided at the bottom end of the fixed arm (1), and a hook body (3) is connected to the bottom end of the connecting arm (2); A locking arm (5), the locking arm (5) being arranged on one side of the top end of the hook body (3), the top end side wall of the hook body (3) being provided with a storage cavity (8) facing the locking arm (5), the interior of the storage cavity (8) being slidably connected to an arc-shaped slide bar (9), one side of the arc-shaped slide bar (9) extending to the outside of the storage cavity (8) and being fixedly connected to the locking arm (5); A drive assembly, the drive assembly comprising a connecting shaft (11) rotatably connected to the side wall of the bottom end of the connecting arm (2) via a bearing, a gear (12) being fixed to one end of the connecting shaft (11), and an arc-shaped toothed plate (13) being arranged on the top side of the locking arm (5), the arc-shaped toothed plate (13) being meshed with the gear (12).

2. The hook self-locking mechanism of a bridge crane according to claim 1, characterized in that: A slot (10) is provided at one end of the hook body (3) relative to the connecting arm (2), and one end of the arc-shaped slide bar (9) can be inserted into the slot (10).

3. The hook self-locking mechanism of a bridge crane according to claim 1, characterized in that: A reinforcing frame (4) is fixed to the side wall of the bottom end of the hook body (3) close to the lower side of the locking arm (5); a positioning block (6) is fixed to one end of the locking arm (5) relative to the reinforcing frame (4); and a positioning groove (7) facing the positioning block (6) is formed at one end of the reinforcing frame (4).

4. The hook self-locking mechanism of a bridge crane according to claim 1, characterized in that: The longitudinal section of the arc-shaped sliding strip (9) is a T-shaped structure.

5. The hook self-locking mechanism of a bridge crane according to claim 1, characterized in that: The drive assembly further comprises a drive motor (14), wherein the drive motor (14) is fixedly connected to a side of the connecting arm (2) relative to the gear (12), and an output end of the drive motor (14) passes through the connecting arm (2) and is connected to the connecting shaft (11).

6. The hook self-locking mechanism of a bridge crane according to claim 5, characterized in that: The outer wall of the driving motor (14) is provided with a protective cover (15).

7. The hook self-locking mechanism of a bridge crane according to claim 1, characterized in that: An arc-shaped groove is formed on the outer side of the locking arm (5), and the arc-shaped tooth plate (13) is embedded in the arc-shaped groove.

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