Anti-falling structure of crane

Abstract

The utility model relates to the technical field of cranes, in particular to an anti-dropping structure of a crane, which comprises a double-hook body and an upright post fixed in the middle of the double-hook body, connecting shafts are rotatably arranged on two sides of the middle upper part of the upright post, anti-dropping rods are sleeved on the connecting shafts, gears are further sleeved on the connecting shafts, and the gears are connected with the double-hook body. A connecting base connected with a crane is located above the stand column, a vertical rod fixed to the top of the stand column penetrates through the bottom wall of the connecting base in a sliding mode and extends into an inner cavity of the connecting base, the top end of the vertical rod is fixedly connected with a sliding plate sliding in the inner cavity of the connecting base, meanwhile, racks are fixed to the two sides of the connecting base and meshed with gears, and the gears are meshed with the gears. The self-service principle is introduced, closing of the anti-disengaging rod is completed through the gravity of an object, and the gravity of the object is in direct proportion to the closing force of the anti-disengaging rod.

Description

Technical Field

[0001] This utility model relates to the field of crane technology, specifically to an anti-detachment structure for a crane. Background Technology

[0002] Double hooks are commonly used in crane hooks. To prevent the lifting chain or hanging ring on the hook from accidentally coming off, an anti-derailment rod is usually installed on the hook. Its end is pressed against the end of the hook to seal the hook opening from the inside, thereby preventing it from coming off.

[0003] When detaching the chain or hanging ring, it is usually necessary to manually pull the anti-detachment bar inward to open the lifting opening. This is not only inconvenient to operate, but also easy for fingers to be squeezed by the anti-detachment bar, creating a safety hazard.

[0004] Therefore, this solution provides an anti-derailment structure for a crane, which can automatically close the anti-derailment bar when lifting before use and automatically open the anti-derailment bar after the heavy object is lowered. Utility Model Content

[0005] The present invention aims to at least solve the problem in the prior art that the opening of the anti-detachment rod in the hook usually requires manual operation.

[0006] This solution provides an anti-derailment structure for a crane, achieved through the following specific technical means: It includes a double hook body and a column fixed in the middle of the double hook body. Connecting shafts rotate on both sides of the upper middle part of the column. An anti-derailment rod is sleeved on the connecting shaft, and a gear is also sleeved on the connecting shaft. A connecting seat for connection to the crane is located above the column. A vertical rod fixed at the top of the column slides through the bottom wall of the connecting seat and extends into the inner cavity of the connecting seat. The top of the vertical rod is fixed to a sliding plate that slides within the inner cavity of the connecting seat. Simultaneously, racks are fixed on both sides of the connecting seat. The racks mesh with the gears. As the connecting seat is lifted, the double hook body, under the pressure of the object, causes the racks to move upward relative to the gears, thereby causing the anti-derailment rod to swing upward and press tightly against the inner end of the double hook body, achieving automatic anti-derailment closure of the lifting opening.

[0007] Preferred technical solution 1: A spring is connected between the sliding plate and the bottom wall of the connecting seat.

[0008] Preferred technical solution 2: The anti-detachment rod has a notch for the rack to slide through.

[0009] Preferred technical solution three: Both sides of the double hook body have a notch two, and a horizontal shaft is rotatably installed in the notch two. A limiting component is sleeved on the horizontal shaft. After the hanging chain or hanging ring on the item is hooked into the hanging opening of the double hook body, the horizontal shaft is rotated to drive the limiting component to swing inward to reduce the movement space after the hanging chain or hanging ring is hung.

[0010] Preferred technical solution four: A protruding rod is also fixed on the horizontal axis, and the end of the anti-detachment rod contacts the bottom side of the end of the protruding rod during the closing process of the anti-detachment rod.

[0011] The above structure gives this solution the following advantages:

[0012] 1. By using a connecting shaft, gears, racks and connecting seats, the anti-detachment rod can be automatically closed during lifting and automatically opened after lifting without using any power components, reducing manual operation steps and improving safety;

[0013] 2. This solution also incorporates the self-service principle, utilizing the weight of the item itself to close the anti-slip bar. The weight of the item is directly proportional to the closing force of the anti-slip bar.

[0014] 3. By setting a limiting component, when the anti-detachment rod is closed, it can also simultaneously reduce the movement space of the hanging chain or hanging ring on the item, confining the hanging chain or hanging ring on the item to a smaller space. Attached Figure Description

[0015] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0016] Figure 1 This is a schematic diagram of the overall structure of this solution;

[0017] Figure 2 This is a sectional view of the scheme;

[0018] Figure 3 This is an exploded view of the proposed solution.

[0019] Figure 4 This is a structural diagram of the double hook body, column, vertical rod and sliding plate of this scheme.

[0020] Among them, 1. Double hook body, 101. Notch 2, 2. Post, 201. Groove, 3. Connecting shaft, 4. Anti-detachment rod, 401. Notch 1, 5. Gear, 6. Connecting seat, 7. Spring, 8. Vertical rod, 9. Slide plate, 10. Horizontal shaft, 11. Limiting component, 12. Protruding rod, 13. Rack. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0022] Please see Figures 1-4 The anti-detachment structure of the crane includes a double hook body 1 and a column 2 fixed in the middle of the double hook body 1. The double hook body 1 forms lifting openings on both sides of the column 2. Grooves 201 are provided on both sides of the upper middle part of the column 2. A connecting shaft 3 rotates in the groove 201 to prevent the gear 5 from being exposed and colliding with other objects. An anti-detachment rod 4 is sleeved on the connecting shaft 3, and a gear 5 is also sleeved on the connecting shaft 3. A connecting seat 6 connected to the crane is located above the column 2. A vertical rod 8 fixed at the top of the column 2 slides through the bottom wall of the connecting seat 6 and extends into the inner cavity of the connecting seat 6. The top of the vertical rod 8 is fixed to a sliding plate 9 that slides in the inner cavity of the connecting seat 6. At the same time, racks 13 are fixed on both sides of the connecting seat 6. The racks 13 mesh with the gear 5. In the initial state, before lifting, the double hook body 1 moves down onto the object. Before the hanging chain or hanging ring on the item is hung into the lifting opening of the double hook body 1, the connecting seat 6 is close to the column 2 under gravity. At this time, the gear 5 and the upper middle part of the rack 13 mesh, so that the anti-detachment rod 4 is in the downward swing state, and the lifting opening is open. The hanging chain or hanging ring on the item can be directly hung into the open lifting opening. As the connecting seat 6 is lifted, the double hook body 1 gradually moves away from the connecting seat 6 under the pressure of the item, so that the rack 13 moves upward relative to the gear 5, which in turn causes the connecting shaft 3 to rotate, causing the anti-detachment rod 4 to swing upward and make tight contact with the inner side of the end of the double hook body 1, so as to realize the automatic anti-detachment closure of the lifting opening; a spring 7 is connected between the sliding plate 9 and the bottom wall of the connecting seat 6. When there is no item hanging on the double hook body 1, the rebound of the spring 7 makes the connecting seat 6 and the column 2 close together, that is, the anti-detachment rod 4 is in the downward swing open state;

[0023] The anti-detachment rod 4 has a notch 401 for the rack 13 to pass through.

[0024] Please see Figures 2-3 The anti-detachment structure of the crane has two notches 101 on both sides of the vertical section of the double hook body 1. The width of the notch 101 is smaller than the width of the anti-detachment rod 4. A horizontal shaft 10 is rotatably installed in the notch 101. A limiting member 11 is sleeved on the horizontal shaft 10. The bottom end of the limiting member 11 is bent outward with an arc-shaped section. After the chain or hanging ring on the item is hooked into the lifting port of the double hook body 1, the horizontal shaft 10 is rotated to drive the arc-shaped section to swing inward to above the chain or hanging ring, and at the same time to be below the anti-detachment rod 4. This further reduces the movement space after the chain or hanging ring is hooked, and avoids the problem of large swing due to excessive movement space. At the same time, the arc-shaped section can also prevent the chain or hanging ring from moving to the outside of the limiting member 11. The arc-shaped section slides against the bottom wall of the notch 101.

[0025] A torsion spring is connected between the horizontal shaft 10 and the two walls of the window. A protruding rod 12 is also fixed on the horizontal shaft 10. During the closing process of the anti-detachment rod 4, the end of the anti-detachment rod 4 contacts the bottom side of the end of the protruding rod 12, thereby achieving the technical effect of driving the horizontal shaft 10 to rotate automatically, and then linking to complete the inward swing of the limiting member 11. The setting of the torsion spring ensures that the limiting member 11 is in the outward swing state before the anti-detachment rod 4 contacts the protruding rod 12.

[0026] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A crane anti-derailment structure, comprising a double hook body (1) and a column (2) fixed in the middle of the double hook body (1), characterized in that: The upper middle part of the column (2) has a connecting shaft (3) on both sides. The connecting shaft (3) is fitted with an anti-detachment rod (4) and a gear (5) is also fitted on the connecting shaft (3). There is a connecting seat (6) connected to the crane at the top of the column (2). The vertical rod (8) fixed at the top of the column (2) slides through the bottom wall of the connecting seat (6) and extends into the inner cavity of the connecting seat (6). The top of the vertical rod (8) is fixed to the sliding plate (9) in the inner cavity of the connecting seat (6). At the same time, racks (13) are fixed on both sides of the connecting seat (6). The racks (13) mesh with the gear (5).

2. The anti-derailment structure for a crane according to claim 1, characterized in that: A spring (7) is connected between the slide plate (9) and the bottom wall of the connecting seat (6).

3. The anti-detachment structure for a crane according to claim 1, characterized in that: The upper middle part of the column (2) is provided with grooves (201) on both sides, and the connecting shaft (3) is rotatably disposed in the grooves (201).

4. The anti-derailment structure for a crane according to claim 1, characterized in that: The anti-detachment rod (4) has a notch (401) for the rack (13) to pass through.

5. The anti-derailment structure for a crane according to claim 1, characterized in that: The double hook body (1) has two notches (101) on both sides of the vertical section. A horizontal shaft (10) is rotatably installed in the notch (101), and a limiting member (11) is sleeved on the horizontal shaft (10).

6. The anti-derailment structure for a crane according to claim 5, characterized in that: A protruding rod (12) is also fixed on the horizontal shaft (10). During the closing process of the anti-detachment rod (4), the end of the anti-detachment rod (4) contacts the bottom side of the end of the protruding rod (12).

7. The anti-derailment structure for a crane according to claim 5, characterized in that: The bottom end of the limiting member (11) is bent outward with an arc-shaped section.

8. The anti-detachment structure for a crane according to claim 6, characterized in that: A torsion spring connects the horizontal axis (10) to the two walls of the window.

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