Anti-falling lifting appliance of crane

Abstract

The utility model relates to the technical field of crane lifting appliances, and particularly discloses an anti-falling lifting appliance of a crane, a lifting seat comprises a C-shaped shell of which the middle part is connected to the bottom end of a base and a cylindrical shell fixed on the outer side of one end of the C-shaped shell, and an inner cavity of the cylindrical shell is communicated with an inner cavity of the C-shaped shell; the C-shaped shackle is arranged in an inner cavity of the C-shaped shell in a sliding and sleeving mode, an arc-shaped groove is formed in the middle of the outer circumferential wall of the C-shaped shackle, and an arc-shaped rack is arranged in the arc-shaped groove; the driving locking piece comprises a gear rotationally mounted in the inner cavity of the cylindrical shell and a transmission structure used for driving the gear to rotate and in threaded connection with the front wall of the C-shaped shell, and the bottom of the gear is meshed with the arc-shaped rack; the problem that the anti-falling performance of the lifting appliance of the crane is poor is well solved.

Description

Technical Field

[0001] This utility model relates to the field of crane lifting equipment technology, specifically a crane anti-fall lifting equipment. Background Technology

[0002] A crane is a multi-action lifting machine that vertically lifts and horizontally moves heavy objects within a certain range. Among its components, the lifting sling is a crucial element. A lifting sling typically consists of a base connected to the lifting wire rope and a hook installed at the bottom of the base, used to hook and attach the heavy object to be lifted.

[0003] To prevent heavy objects from falling off the lifting device and causing accidents, anti-falling plates are often installed on the lifting device. These plates are equipped with torsion springs and can swing elastically, thus facilitating the hooking and unhooking of heavy objects while preventing them from falling off.

[0004] However, commonly used lifting devices with anti-detachment baffles are prone to the baffles not rebounding properly after long-term use, which can lead to a certain risk of the hooked heavy objects falling. Utility Model Content

[0005] The purpose of this utility model is to provide a crane anti-falling lifting device to solve the problem of poor anti-falling performance of current crane lifting devices.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a crane fall arrestor, comprising a base, the base comprising a C-shaped housing connected in the middle to the bottom end of the base and a cylindrical housing fixed to the outer side of one end of the C-shaped housing, the inner cavity of the cylindrical housing communicating with the inner cavity of the C-shaped housing; a C-shaped hook ring slidably fitted into the inner cavity of the C-shaped housing, an arc-shaped groove provided in the middle of the outer peripheral wall of the C-shaped hook ring, an arc-shaped rack provided in the arc-shaped groove; the driving locking component comprises a gear rotatably mounted in the inner cavity of the cylindrical housing and meshing with the arc-shaped rack at its bottom, and a transmission structure for driving the gear to rotate and threadedly connected to the front wall of the C-shaped housing.

[0007] Preferably, the gear center is fixedly fitted with a bushing at both ends, which are rotatably fitted with the front and rear walls of the cylindrical housing cavity, respectively. The drive locking component also includes a prism slidably fitted in the bushing, a short shaft fixedly connected to the front end of the prism, an elongated block fixed to the front end of the short shaft at the top of the rear wall, and a handle threadedly fitted to the side wall of the elongated block. The bottom of the elongated block is provided with a through hole that is slidably fitted to the end of the handle, and the front wall of the C-shaped housing is provided with a positioning screw hole that is threadedly fitted to the end of the handle.

[0008] Preferably, the middle part of the side wall of the elongated block is provided with a connecting screw hole that matches the threaded connection of the end of the handle, and the front wall of the cylindrical housing is provided with a sleeve hole that matches the rotatable connection of the short shaft. The distance between the through hole and the central axis of the short shaft is equal to the hole distance between the sleeve hole and the positioning screw hole.

[0009] Preferably, the base includes an outer shell, a grooved wheel with its front and rear ends rotatably mounted on the top of the front and rear walls of the outer shell, and a connecting shaft with its front and rear ends mounted on the middle of the bottom of the front and rear walls of the outer shell. A short column is fixedly connected to the top of the C-shaped shell, and a ring is fixed at the top of the short column to be rotatably fitted and matched with the connecting shaft.

[0010] Preferably, the outer diameter of the screw at the end of the handle is smaller than the outer diameter of its main body.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] This utility model relates to a crane anti-falling device that not only facilitates the unhooking and hooking of heavy objects, but also enables reliable locking to enhance the anti-falling performance of the crane device. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural diagram of the entire utility model;

[0014] Figure 2 This is a three-dimensional structural diagram of the base of this utility model;

[0015] Figure 3 This is a three-dimensional structural diagram of the hanging bracket of this utility model;

[0016] Figure 4 This is a three-dimensional structural diagram of the C-shaped hook and loop of this utility model;

[0017] Figure 5 This is an exploded structural diagram of the driving and locking components of this utility model.

[0018] In the diagram: 1-Base; 1.1-Outer shell; 1.2-Gate wheel; 1.3-Connecting shaft;

[0019] 2-Hanging base; 2.1-Ring body; 2.2-Short column; 2.3-C-shaped shell; 2.4-Cylindrical shell; 2.5-Sleeve hole; 2.6-Positioning screw hole;

[0020] 3-C-shaped hook and loop; 3.1-Arc-shaped groove; 3.2-Arc-shaped toothed rack;

[0021] 4-Drive locking component; 4.1-Gear; 4.1.1-Sleeve; 4.2-Olive block; 4.2.1-Connecting screw hole; 4.2.2-Through hole; 4.3-Short shaft; 4.4-Pyramid; 4.5-Handle. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Please see Figure 1-5 This utility model provides a technical solution: a crane fall arrestor, the base 1 including an outer shell 1.1, grooved wheels 1.2 rotatably mounted on the top of the front and rear walls of the outer shell 1.1 at the front and rear ends of a central shaft, and connecting shafts 1.3 mounted on the middle of the bottom of the front and rear walls of the outer shell 1.1 at the front and rear ends. Grooved wheels 1.2 are respectively provided at the top of the two sides of the inner cavity of the outer shell 1.1. The free end of the wire rope on the crane trolley is unwound from the drum and passes through the groove of the grooved wheel 1.2 before being fixed to the crane trolley, so that the base 1 moves up and down as a whole when the drum winds up and unwinds the wire rope. The grooved wheel 1.2 generally has multiple grooves, and the crane trolley has correspondingly multiple grooved wheels, allowing the wire rope to pass back and forth over the multiple grooved wheels and the grooved wheel 1.2 in sequence.

[0024] The hanger 2 includes a ring 2.1 rotatably mounted on a connecting shaft 1.3, a short column 2.2 with its top end fixed to the bottom of the ring 2.1, a C-shaped shell 2.3 with its outer peripheral wall fixed to the bottom end of the short column, and a cylindrical shell 2.4 fixed to the outer side of one end of the C-shaped shell 2.3. The inner cavity of the cylindrical shell 2.4 communicates with the inner cavity of the C-shaped shell 2.3. The center of the front wall of the cylindrical shell 2.4 is provided with a sleeve hole 2.5, and the front wall of the C-shaped shell 2.3 is provided with a positioning screw hole 2.6 near the sleeve hole 2.5.

[0025] The C-shaped hook 3 is slidably fitted into the inner cavity of the C-shaped shell 2.3. An arc-shaped groove 3.1 is provided in the middle of the outer peripheral wall of the C-shaped hook 3, and an arc-shaped toothed rack 3.2 is provided in the arc-shaped groove 3.1.

[0026] The drive locking component 4 includes a gear 4.1 rotatably mounted in the inner cavity of the cylindrical housing 2.4 and meshing with the arc-shaped rack 3.2 at its bottom, and a transmission structure for driving the gear 4.1 to rotate and threadedly connected to the front wall of the C-shaped housing 2.3. Specifically, a bushing 4.1.1 is fixedly fitted at the center of the gear 4.1, with its two ends rotatably fitted to the front and rear walls of the inner cavity of the cylindrical housing 2.4, respectively. The transmission structure of the drive locking component 4 includes a prism 4.4 slidably fitted within the bushing 4.1.1, a short shaft 4.3 fixedly abutting the front end of the prism 4.4, an elongated block 4.2 fixed to the front end of the short shaft 4.3 at the top of the rear wall, and a handle 4.5. The short shaft 4.3 rotatably fits within the sleeve hole 2.5. The bottom of the elongated block 4.2 has a through hole 4.2.2 that slidably engages with the screw at the end of the handle 4.5. The positioning screw hole on the front wall of the C-shaped housing 2.3 is threadedly engaged with the screw at the end of the handle 4.5. The middle of the side wall of the elongated block 4.2 is provided with a connecting screw hole 4.2.1 that matches the threaded sleeve at the end of the handle 4.5. The distance between the through hole 4.2.2 and the central axis of the short shaft 4.3 is equal to the hole spacing between the sleeve hole 2.5 and the positioning screw hole 2.6. The outer diameter of the screw at the end of the handle 4.5 is smaller than the outer diameter of its body.

[0027] In summary, during hook operation, the lifting ring of the heavy object is inserted into the C-shaped hook 3. At this time, the screw at the end of the handle 4.5 is threaded into the connecting screw hole 4.2.1. This allows the long cylindrical block 4.2 to be rotated via the handle 4.5, causing the short shaft 4.3 to drive the gear 4.1 to rotate via the prism 4.4. Due to the meshing transmission between the gear 4.1 and the arc-shaped rack 3.2, the C-shaped hook 3 is driven to move within the C-shaped housing 2.3. The opening of the C-shaped hook 3 gradually intersects with the opening of the C-shaped housing 2.3, tending towards a closed loop. When the opening of the hook structure is closed, the through hole 4.2.2 is exactly aligned with the positioning screw hole 2.6. The screw at the end of the handle 4.5 is then unscrewed from the connecting screw hole 4.2.1, and then the screw at the end of the handle 4.5 is threaded through the through hole 4.2.2 and threaded into the positioning screw hole 2.6 to lock the long cylindrical block 4.2, thus ensuring the anti-falling performance of the lifting device.

[0028] When it is necessary to remove the hook, first unscrew the screw at the end of the handle 4.5 from the positioning screw hole 2.6 and reinstall it in the connecting screw hole 4.2.1. By rotating the long round block 4.2 in the opposite direction by the handle 4.5, the C-shaped hook ring 3 can be moved in the opposite direction so that the opening of the C-shaped hook ring 3 is realigned with the opening of the C-shaped housing 2.3, thereby making it easier to remove the lifting ring of the heavy object from the C-shaped hook ring 3.

[0029] The transmission structure can be unlocked and locked simply by moving the handle at position 4.5. The handle at position 4.5 also facilitates easy switching between the closed and open states of the C-shaped hook 3. Compared to the current method of manually overcoming the torsion spring and actuating the stop plate, this significantly improves operational convenience.

[0030] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0031] 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 fall arrestor, comprising a base (1), characterized in that, Also includes: The hanging base (2) includes a C-shaped shell (2.3) connected to the bottom of the base (1) in the middle and a cylindrical shell (2.4) fixed to the outer side of one end of the C-shaped shell (2.3), the inner cavity of the cylindrical shell (2.4) communicating with the inner cavity of the C-shaped shell (2.3); C-shaped hook (3), the C-shaped hook (3) is slidably fitted into the inner cavity of the C-shaped shell (2.3), the outer peripheral wall of the C-shaped hook (3) is provided with an arc-shaped groove (3.1) in the middle position, and an arc-shaped toothed rack (3.2) is provided in the arc-shaped groove (3.1); The drive locking member (4) includes a gear (4.1) rotatably mounted in the inner cavity of the cylindrical housing (2.4) and meshing with the arc-shaped rack (3.2) at its bottom, and a transmission structure for driving the gear (4.1) to rotate and threadedly connected to the front wall of the C-shaped housing (2.3).

2. The crane fall arrestor according to claim 1, characterized in that: The gear (4.1) is centrally fitted with a bushing (4.1.1) whose two ends are respectively rotatably fitted with the front and rear walls of the inner cavity of the cylindrical housing (2.4). The drive locking component (4) also includes a prism (4.4) slidably fitted in the bushing (4.1.1), a short shaft (4.3) fixedly connected to the front end of the prism (4.4), an elongated block (4.2) whose rear wall top is fixed to the front end of the short shaft (4.3), and a handle (4.5) threadedly fitted to the side wall of the elongated block (4.2). The bottom of the elongated block (4.2) is provided with a through hole (4.2.2) that is slidably fitted with the end of the handle (4.5). The front wall of the C-shaped housing (2.3) is provided with a positioning screw hole (2.6) that is threadedly fitted with the end of the handle (4.5).

3. A crane fall arrestor according to claim 2, characterized in that: The middle part of the side wall of the elongated block (4.2) is provided with a connecting screw hole (4.2.1) that matches the threaded connection of the end of the handle (4.5). The front wall of the cylindrical housing (2.4) is provided with a sleeve hole (2.5) that matches the rotatable connection of the short shaft (4.3). The distance between the through hole (4.2.2) and the central axis of the short shaft (4.3) is equal to the hole spacing between the sleeve hole (2.5) and the positioning screw hole (2.6).

4. A crane fall arrestor according to claim 1, characterized in that: The base (1) includes an outer shell (1.1), a grooved wheel (1.2) with the front and rear ends of the central shaft rotatably mounted on the top of the front and rear walls of the outer shell (1.1), and a connecting shaft (1.3) with the front and rear ends mounted on the middle of the bottom of the front and rear walls of the outer shell (1.1). A short column (2.2) is fixedly connected to the top of the C-shaped shell (2.3), and a ring (2.1) is fixed at the top of the short column (2.2) to be rotatably fitted and matched with the connecting shaft (1.3).

5. A crane fall arrestor according to claim 3, characterized in that: The outer diameter of the screw at the end of the handle (4.5) is smaller than the outer diameter of its main body.

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