An automatic opening anti-come unhooking pawl hook and its use method

Abstract

The application discloses an automatically openable anti-unhooking pawl hook, which comprises a hook, an anti-unhooking pawl, a connecting rod, a pressing rod and a releasing mechanism, the anti-unhooking pawl is rotatably arranged at the neck of the hook, and one end of the anti-unhooking pawl can abut against the end of the hook to close the mouth of the hook when the anti-unhooking pawl rotates; the two ends of the connecting rod are respectively connected with the anti-unhooking pawl and the pressing rod through hinge structures; one end of the pressing rod is connected with the mouth of the hook through an elastic reset element; the other end of the pressing rod is connected with the releasing mechanism; the pressing rod is at least partially located above the groove of the hook in the initial state of the elastic reset element; when the hook is matched with a rigging, the rigging presses down the pressing rod, triggers the connecting rod to drive the anti-unhooking pawl to rotate and close the mouth of the hook; when the rigging is lifted and separated from the groove of the hook, the pressing rod is reset under the action of the elastic reset element and the releasing mechanism, drives the connecting rod to make the anti-unhooking pawl rotate and open the mouth of the hook. The anti-unhooking device is automatically opened, and the problem that the anti-unhooking device is inconvenient to be manually opened in some special occasions is solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of hoisting and lifting, in particular to an automatically openable anti-unhooking pawl hook and a use method thereof. BACKGROUND

[0002] The hook is the most common lifting tool in hoisting machinery, and is widely used in manufacturing, construction, port logistics and other fields, and undertakes the key task of lifting and transporting goods. An important point in the use of the hook is how to prevent the goods from unhooking. The common anti-unhooking method of the hook is to use an anti-unhooking pawl, which forms a closed ring with the hook under the action of a spring or gravity. When lifting the goods, the goods rigging presses down the pawl, and the rigging enters the hook, and the pawl resets to achieve self-locking.

[0003] The structure of the spring type anti-unhooking pawl hook in the prior art is generally composed of a hook, an anti-unhooking pawl and a torsion spring. When lifting the goods, the goods rigging presses down the anti-unhooking pawl, and the torsion spring is pressed at the same time. When the rigging completely enters and no longer presses the anti-unhooking pawl, the anti-unhooking pawl resets under the action of the torsion spring, and forms a closed ring with the hook to achieve self-locking. The disadvantage is that the rigging cannot be automatically unhooked without external force, and the operator needs to manually press down the pawl to release the rigging when unloading the goods. In some scenarios such as the lifting process of a large hopper, the place where the operator can stand is far away from the hook, and it is not convenient to operate when releasing the rigging. Although some hooks can solve the problem of unhooking during the lifting process of the lifting equipment, manual operation is still required to complete the final rigging release action in the use process, and it is still not convenient to operate in some occasions. SUMMARY

[0004] In order to solve the above problems in the prior art, the present application provides an automatically openable anti-unhooking pawl hook and a use method thereof, which solve the above technical problems.

[0005] In order to achieve the above-mentioned purpose, according to the first aspect of the present application, an automatically openable anti-unhooking pawl hook is provided, which comprises a hook, an anti-unhooking pawl, a connecting rod, a pressing rod and a release mechanism. The anti-unhooking pawl is rotatably arranged at the neck of the hook, and one end of the anti-unhooking pawl can abut against the end of the hook to close the mouth of the hook when the anti-unhooking pawl rotates. The two ends of the connecting rod are connected to the anti-unhooking pawl and the pressing rod through hinge structures respectively. One end of the pressing rod is connected to the mouth of the hook through an elastic return element, and the other end of the pressing rod is connected to the release mechanism. The pressing rod is at least partially located above the groove of the hook in the initial state of the elastic return element. When the hook cooperates with the rigging, the rigging presses down the pressing rod, triggering the connecting rod to drive the anti-unhooking pawl to rotate and close the mouth of the hook. When the rigging rises and separates from the groove of the hook, the pressing rod is reset under the action of the elastic return element and the release mechanism, and drives the connecting rod to rotate the anti-unhooking pawl to open the mouth of the hook. The automatically openable anti-unhooking pawl hook realizes the function of automatically closing the anti-unhooking pawl of the hook when the rigging cooperates, and automatically opening when the rigging separates, through the cooperation of the anti-unhooking pawl, the connecting rod, the pressing rod and the release mechanism, improves the convenience and safety of hoisting operation, and avoids the inconvenience and potential risks caused by manual operation of the anti-unhooking pawl.

[0006] In some specific embodiments, the hook comprises front and rear housings, and the front and rear housings are matched with each other and form an open slot in the middle of the cooperation area of the hook and the rigging. The anti-unhooking pawl and the pressing rod are arranged in the open slot. The front and rear housing structures of the hook and the open slot design provide a reasonable installation space for the anti-unhooking pawl and the pressing rod, make the layout of each component more compact, and are beneficial to the miniaturization and integration of the whole device, and can also better protect the internal components from the external environment.

[0007] In some specific embodiments, the connecting rod is an arc-shaped connecting rod, and one end of the arc-shaped connecting rod is hinged to the middle of the pressing rod. With this arrangement, the force transmission process can be more smooth to drive the anti-unhooking pawl to rotate, the force transmission path is optimized, and the working efficiency and reliability of the device are improved.

[0008] In some specific embodiments, the hinge joint of the arc-shaped connecting rod and the pressing rod is always located inside the front and rear housings when the pressing rod rotates. With the design of the arc-shaped connecting rod, the layout of the internal space of the hook can be better adapted.

[0009] In some specific embodiments, the releasing mechanism comprises a gear pair, a first fixed shaft, a ratchet mechanism, a second fixed shaft, a third fixed shaft and an escapement mechanism, the gear pair comprises a large gear and a small gear, the large gear is rotatably arranged on the first fixed shaft, the ratchet mechanism is arranged on the large gear and the first fixed shaft, the small gear is rotatably arranged on the second fixed shaft and engaged with the large gear, the escapement mechanism is used for controlling the rotating speed of the gear pair and comprises an escapement wheel and an escapement lever, the escapement wheel is fixedly arranged on the second fixed shaft, and the escapement lever is fixedly arranged on the third fixed shaft. The cooperation of the gear pair, the ratchet mechanism and the escapement mechanism in the releasing mechanism can accurately control the resetting speed of the pressing rod, so that the slow opening of the anti-falling pawl is realized, and the anti-falling pawl can still be kept in the closed state when the load has a large bump in the hoisting process, thereby improving the stability and reliability of the device.

[0010] In some specific embodiments, the ratchet mechanism comprises a ratchet wheel and a ratchet pawl, the ratchet wheel is fixedly arranged on the first fixed shaft, and the ratchet pawl is fixed to the surface of the large gear. The arrangement of the ratchet wheel and the ratchet pawl of the ratchet mechanism further ensures the unidirectionality and stability of the gear pair during rotation, so that the device can operate in a predetermined direction and manner during operation, and abnormal situations such as reverse rotation are avoided.

[0011] In some specific embodiments, the releasing mechanism further comprises an energy storage mechanism arranged on the first fixed shaft and used for storing energy when the pressing rod is pressed down by the rigging and releasing the pressing rod to reset when the rigging leaves the pressing rod. The arrangement of the energy storage mechanism enables the pressing rod to store energy when it is pressed down by the rigging and release energy to push the pressing rod to reset when the rigging leaves, thereby providing a reliable energy source for the automatic resetting of the device and ensuring that the device can work continuously and stably.

[0012] In some specific embodiments, the energy storage mechanism comprises a clock spring arranged on one side of the front and rear housings and connected with the first fixed shaft. The clock spring as the energy storage mechanism has the characteristics of simple structure and good energy storage effect, can effectively store the energy in the process of pressing down the pressing rod, and release the energy when needed, thereby providing strong support for the automatic operation of the device.

[0013] In some specific embodiments, the elastic resetting element comprises a resetting spring, and the opening groove of the mouth of the hook and the front end of the pressing rod are provided with resetting spring mounting columns, and the two ends of the resetting spring are connected with the resetting spring mounting columns, respectively.

[0014] According to the second aspect of the present application, a use method of an anti-falling hook pawl hook capable of being automatically opened is provided, which adopts the anti-falling hook pawl hook capable of being automatically opened as described above, and comprises the following steps:

[0015] S1: In the initial state when the hook is not matched with the rigging, the anti-falling pawl is in the open state under the action of the elastic resetting element.

[0016] S2: When the hook is matched with the rigging, the rigging presses down the pressure rod, triggers the connecting rod to drive the anti-drop pawl to rotate and close the mouth of the hook, the elastic reset element is stretched, and the energy storage mechanism inside the release mechanism is energized;

[0017] S3: When the rigging rises and separates from the groove of the hook, the pressure rod is reset under the action of the elastic reset element and the energy storage mechanism, drives the connecting rod to rotate and open the mouth of the hook, and controls the reset rotation speed of the pressure rod through the escapement mechanism inside the release mechanism.

[0018] In summary, the beneficial effects of the present application compared with the prior art are:

[0019] The automatically openable anti-drop hook pawl hook of the present application can realize automatic opening of the anti-drop device, solve the problem of inconvenience of manual opening of the anti-drop device in some special occasions, and slowly open the anti-drop pawl after hoisting without manual operation, and the anti-drop pawl can also remain closed when there is a large jolt in the hoisting process. BRIEF DESCRIPTION OF DRAWINGS

[0020] The accompanying drawings are included to provide a further understanding of embodiments and are incorporated in and constitute a part of this specification. The drawings illustrate embodiments and serve to explain principles of the present application. Other embodiments and many of the intended advantages of the present application will be readily appreciated as the same becomes better understood by reference to the following detailed description when considered in connection with the accompanying drawings. Other features, objects, and advantages of the present application will become more apparent from the following detailed description when read in connection with the accompanying drawings, in which:

[0021] Figure 1 is a structural schematic diagram of an automatically openable anti-drop hook pawl hook of an embodiment of the present application;

[0022] Figure 2 is a structural schematic diagram of an automatically openable anti-drop hook pawl hook of an embodiment of the present application;

[0023] Figure 3 is a structural schematic diagram of a release mechanism of an embodiment of the present application;

[0024] Figure 4 is a flowchart of a method for using the automatically openable anti-drop hook pawl hook of an embodiment of the present application.

[0025] Reference numerals: 10 - hook, 20 - anti-dropping pawl, 30 - connecting rod, 40 - pressing rod, 50 - elastic reset element, 60 - release mechanism, 61 - gear pair, 62 - first fixed shaft, 63 - ratchet mechanism, 64 - second fixed shaft, 65 - third fixed shaft, 66 - escapement mechanism, 67 - energy storage mechanism. DETAILED DESCRIPTION

[0026] In the description of the present application, it should be noted that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0027] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "installation", "connection", "fixing" and the like should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral; it can be mechanical connection, or electrical connection; it can be direct connection, or indirect connection through intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0028] The present application will be further described in detail below in conjunction with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the related application, and not to limit the application. In addition, it should be noted that for the convenience of description, only the parts related to the application are shown in the drawings.

[0029] Figure 1 A structural schematic diagram of an automatically openable anti-dropping hook pawl hook according to one embodiment of the present application is shown, combined with Figure 2 A schematic diagram of the internal structure of an automatically openable anti-dropping hook pawl hook according to one specific embodiment of the present application is shown, as shown in Figure 1 and 2As shown, the anti-falling hook with automatically opened anti-falling pawl includes a hook 10, an anti-falling pawl 20, a connecting rod 30, a pressing rod 40, an elastic reset element 50, and a release mechanism 60. The anti-falling pawl 20 is fixed on the neck of the hook through a hinge, so that it can rotate around the hinge point to realize the opening and closing action of the mouth of the hook 10. The two ends of the connecting rod 30 are respectively connected to the anti-falling pawl 20 and the pressing rod 40 through a hinge structure. One end of the pressing rod 40 is connected to the mouth of the hook 10 through the elastic reset element 50, and the other end of the pressing rod 40 is connected to the release mechanism 60. The pressing rod 40 is at least partially located above the groove of the hook in the initial state of the elastic reset element 50. When the hook 10 cooperates with the rigging, the rigging presses down the pressing rod, triggers the connecting rod 30 to drive the anti-falling pawl 20 to rotate and close the mouth of the hook 10. When the rigging rises and is separated from the groove of the hook 10, the pressing rod 40 is reset under the action of the elastic reset element 50 and the release mechanism 60, and drives the connecting rod 30 to make the anti-falling pawl 20 rotate and open the mouth of the hook.

[0030] In a specific embodiment, the elastic reset element 50 includes a reset spring, and the mouth of the hook 10 is provided with a reset spring mounting column at the opening groove, and the front end of the pressing rod 40 is provided with a reset spring mounting column.

[0031] In a specific embodiment, the hook 10 includes front and rear housings, and the front and rear housings are matched with each other and form an opening groove in the middle of the cooperation area of the hook 10 and the rigging. The anti-falling pawl 20 and the pressing rod 40 are both arranged in the opening groove. The front and rear housing structures of the hook and the opening groove design provide a reasonable installation space for the anti-falling pawl 20 and the pressing rod 40, so that the layout of each component is more compact, which is conducive to the miniaturization and integration of the whole device, and can also better protect the internal components from the external environment.

[0032] In a specific embodiment, the connecting rod 30 is an arc-shaped connecting rod, and one end of the arc-shaped connecting rod is hinged to the middle of the pressing rod. The hinged position of the arc-shaped connecting rod and the pressing rod 40 is always located inside the front and rear housings when the pressing rod 40 rotates. The design of the arc-shaped connecting rod can better adapt to the layout of the internal space of the hook, and can more smoothly drive the anti-falling pawl to rotate in the process of force transmission, optimizing the force transmission path and improving the working efficiency and reliability of the device.

[0033] In a specific embodiment, the release mechanism 60 is a key part to realize the automatic opening and closing function of the anti-falling pawl, which includes a gear pair 61, a first fixed shaft 62, a ratchet mechanism 63, a second fixed shaft 64, a third fixed shaft 65, an escapement mechanism 66, and a clockwork spring 67. Figure 3 A structural schematic diagram of the release mechanism according to a specific embodiment of the present application is shown, which is combined with Figure 3As shown, the gear pair 61 has a large gear and a small gear, respectively mounted on the first fixed shaft 62 and the second fixed shaft 64. The large gear can rotate freely, while the small gear is locked in rotation, which allows specific speed control during power transmission. The ratchet mechanism 63 includes a ratchet and a pawl, the ratchet is fixed on the first fixed shaft 62, and the pawl is fixed on the large gear, which ensures that the ratchet mechanism rotates synchronously with the first fixed shaft 62. The escapement mechanism 66 is used to control the speed of the gear pair, which includes an escapement wheel and an escapement lever, the escapement wheel is fixed on the second fixed shaft 64, and the escapement lever is fixed on the third fixed shaft 65. The precise control of the rotation speed of the first fixed shaft 62 is achieved through the cooperation of the escapement wheel and the escapement lever.

[0034] In a specific embodiment, the release mechanism 60 further includes an energy storage mechanism 67, which is arranged on the first fixed shaft and is used to store energy when the pressure rod 40 is pressed down by the rigging, and to release the tendency of the pressure rod to return to its original position when the rigging moves away from the pressure rod 40. The arrangement of the energy storage mechanism 67 enables the pressure rod 40 to store energy when it is pressed down by the rigging, and to release energy to push the pressure rod back to its original position when the rigging moves away, providing a reliable source of energy for the automatic reset of the device and ensuring that the device can work continuously and stably. In a specific embodiment, the energy storage mechanism 67 includes a clockwork spring, which is arranged on one side of the front and rear housings and is connected with the first fixed shaft 62. As an energy storage mechanism, the clockwork spring has the characteristics of simple structure and good energy storage effect, and can effectively store the energy generated during the pressing down of the pressure rod 40, and release it when needed, providing strong support for the automatic operation of the device.

[0035] Figure 4 A flow chart of the use method of the automatically openable anti-unhooking pawl hook according to an embodiment of the present application is shown. As shown in the figure, Figure 4 The method includes the following steps:

[0036] S1: In the initial state when the hook is not matched with the rigging, the anti-unhooking pawl is in the open state under the action of the elastic reset element;

[0037] S2: When the hook is matched with the rigging, the rigging presses down the pressure rod, triggering the connecting rod to drive the anti-unhooking pawl to rotate and close the mouth of the hook, the elastic reset element is stretched, and the energy storage mechanism inside the release mechanism stores energy;

[0038] S3: When the rigging rises and moves away from the groove of the hook, the pressure rod is reset under the action of the elastic reset element and the energy storage mechanism, driving the connecting rod to rotate and open the mouth of the hook, and the reset rotation speed of the pressure rod is controlled by the escapement mechanism inside the release mechanism.

[0039] In a specific embodiment, the basic working process of the automatically openable anti-unhooking pawl hook according to the present application is as follows:

[0040] Initial state:

[0041] Under the action of the tension spring, the pressure rod 40 is in the initial position. At this time, the anti-drop pawl 20 is in the open state, preparing for the subsequent entering of the rigging. At the same time, the energy storage mechanism 67 has not started to store energy, and each component is in a relatively static initial setting.

[0042] Rigging pressing stage:

[0043] When the rigging presses the pressure rod 40, the following linkage reaction is triggered: the pressure rod 40 and the first fixed shaft 62 rotate. This rotation is transmitted to the anti-drop pawl 20 through the connecting rod 30, driving the anti-drop pawl 20 to rotate and form a closed loop with the hook 10, thereby achieving anti-unhooking locking of the rigging. The elastic reset element 50 is stretched during the rotation of the pressure rod 40, storing a certain amount of elastic potential energy to provide the basis for subsequent actions. The rotation of the first fixed shaft 62 also drives the energy storage mechanism 67 to rotate, and the energy storage mechanism 67 starts to store energy to reserve energy for the subsequent reset process.

[0044] Rigging lifting stage:

[0045] When the rigging is lifted and no longer exerts pressure on the pressure rod 40, the pressure rod 40 rises under the joint action of the elastic reset element 50 and the energy storage mechanism 67. At this time, the ratchet mechanism starts to work, and the ratchet is fixed on the first fixed shaft 62, and the ratchet pawl is fixed on the large gear. With the rotation of the first fixed shaft 62, the large gear rotates. Since the small gear of the gear pair 61 is locked in rotation, the rotation of the large gear will drive the small gear to rotate in a specific way. The rotation speed of the first fixed shaft 62 is limited by the escapement mechanism 66. The escapement wheel of the escapement mechanism 66 is fixed on the second fixed shaft 64, and the escapement lever is fixed on the third fixed shaft 65. Through the precise control of the escapement mechanism 66, the pressure rod 40 can slowly rise. In the process of slow rising of the pressure rod 40, the anti-drop pawl 20 will also slowly open through the connection of the connecting rod 30, and finally return to the initial open state, completing a working cycle.

[0046] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. In addition, different embodiments or examples described in the present specification and the features of different embodiments or examples can be combined and combined by those skilled in the art without contradiction.

[0047] Although the embodiments of the present application have been shown and described above, it is understood that the above-described embodiments are exemplary and are not to be construed as limiting the present application, and that those ordinarily skilled in the art can make various changes, modifications, substitutions and variations within the scope of the present application.

[0048] The above description of the specific embodiments of the present application is not to be construed as limiting the scope of protection of the present application. Any other corresponding changes and modifications made according to the technical concept of the present application should be included within the scope of protection of the present application.

Claims

1. An automatic opening anti-come-along pawl hook characterized by, The hook, the anti-falling pawl, the connecting rod, the pressure rod and the release mechanism, the anti-falling pawl is rotatably arranged on the neck of the hook, and one end of the anti-falling pawl can abut against the end of the hook to close the mouth of the hook when the anti-falling pawl rotates, the two ends of the connecting rod are connected with the anti-falling pawl and the pressure rod through the hinge structure respectively, one end of the pressure rod is connected with the mouth of the hook through the elastic reset element, the other end of the pressure rod is connected with the release mechanism, the pressure rod is at least partially located above the groove of the hook in the initial state of the elastic reset element, when the hook cooperates with the rigging, the rigging presses down the pressure rod, triggers the connecting rod to drive the anti-falling pawl to rotate and close the mouth of the hook, when the rigging rises and separates from the groove of the hook, the pressure rod resets under the action of the elastic reset element and the release mechanism, and drives the connecting rod to make the anti-falling pawl rotate and open the mouth of the hook; the release mechanism comprises a gear pair, a first fixed shaft, a ratchet mechanism, a second fixed shaft, a third fixed shaft and a escapement mechanism, the gear pair comprises a large gear and a small gear, the large gear is rotatably arranged on the first fixed shaft, the ratchet mechanism is arranged on the large gear and the first fixed shaft, the small gear is rotatably arranged on the second fixed shaft and is engaged with the large gear, the escapement mechanism is used for controlling the rotation speed of the gear pair, comprising an escapement wheel and an escapement fork, the escapement wheel is fixedly arranged on the second fixed shaft, and the escapement fork is fixedly arranged on the third fixed shaft; the release mechanism further comprises an energy storage mechanism, the energy storage mechanism is arranged on the first fixed shaft and is used for storing energy when the pressure rod is pressed down by the rigging, and releasing the pressure rod to reset when the rigging leaves the pressure rod.

2. The self-opening anti-unhooking pawl hook according to claim 1, wherein, The hook comprises front and rear housings, the front and rear housings are matched with each other and form an open groove in the middle of the cooperation area of the hook and the rigging, and the anti-falling pawl and the pressure rod are arranged in the open groove.

3. The self-opening anti-unhooking pawl hook of claim 2, wherein, The connecting rod is an arc-shaped connecting rod, and one end of the arc-shaped connecting rod is hinged with the middle part of the pressure rod.

4. The self-opening anti-unhooking pawl hook according to claim 3, wherein, The hinge part of the arc-shaped connecting rod and the pressure rod is always located inside the front and rear housings when the pressure rod rotates.

5. The self-opening anti-unhooking pawl hook of claim 1, wherein, The ratchet mechanism comprises a ratchet wheel and a ratchet pawl, the ratchet wheel is fixedly arranged on the first fixed shaft, and the ratchet pawl is fixed to the surface of the large gear.

6. The self-opening anti-unhooking pawl hook of claim 2, wherein, The energy storage mechanism comprises a clock spring, the clock spring is arranged on one side of the front and rear housings and is connected with the first fixed shaft.

7. The self-opening anti-unhooking pawl hook of claim 2, wherein, The elastic reset element comprises a reset spring, reset spring mounting columns are arranged at the open groove of the mouth of the hook and the front end of the pressure rod, and the two ends of the reset spring are connected with the reset spring mounting columns respectively.

8. A method of using an automatic opening anti-come-along catch hook, comprising: The automatic opening anti-falling hook pawl hook is used, and the following steps are included: S1: in the initial state when the hook does not cooperate with the rigging, the anti-falling pawl is in the open state under the action of the elastic reset element. S2: When the hook is matched with the rigging, the rigging presses down the pressure rod, triggers the connecting rod to drive the anti-off pawl to rotate and close the mouth of the hook, the elastic reset element is stretched, and the energy storage mechanism inside the release mechanism is energized; S3: When the rigging rises and separates from the groove of the hook, the pressure rod resets under the action of the elastic reset element and the energy storage mechanism, drives the connecting rod to rotate and open the mouth of the hook, and controls the reset rotation speed of the pressure rod through the escapement mechanism inside the release mechanism.

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