Mousing-hook pawl lifting hook capable of being automatically opened

Abstract

The hook comprises a hook body, an anti-disengaging pawl, a connecting rod, a pressing rod and a releasing mechanism, the anti-disengaging pawl is rotatably arranged on the neck portion of the hook body, one end of the anti-disengaging pawl can abut against the tail end of the hook body to seal the opening portion of the hook body when the anti-disengaging pawl rotates, and the two ends of the connecting rod are connected with the anti-disengaging pawl and the pressing rod through hinge structures respectively. One end of the pressing rod is connected to the opening of the lifting hook through the elastic reset element, the other end of the pressing rod is connected with the releasing mechanism, at least part of the pressing rod is located above a groove of the lifting hook in the initial state of the elastic reset element, and when the lifting hook is matched with the rigging, the rigging presses down the pressing rod to trigger the connecting rod to drive the anti-disengaging pawl to rotate to seal the opening of the lifting hook. When the rigging is lifted to be separated from the groove of the lifting hook, the pressing rod is reset under the action of the elastic reset element and the release mechanism to drive the connecting rod to rotate the anti-falling pawl to open the opening part of the lifting hook. According to the application, automatic opening of the anti-unhooking device is realized, and the problem that the anti-unhooking device is inconvenient to open manually in some special occasions is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of hoisting, in particular to an anti - disengaging pawl hook that can be automatically opened. Background Technique

[0002] A hook is one of the most common lifting tools in lifting machinery, which is widely used in multiple fields such as manufacturing, construction, port logistics, etc., and undertakes the key tasks of lifting and transporting items. An important point in the process of using a hook is how to prevent the items from being disengaged. The common anti - disengaging method for a hook is to use an anti - disengaging pawl. Under the action of a spring or gravity, the pawl and the hook form a closed loop. When lifting an item, the item sling presses down the pawl. After the sling enters the hook, the pawl resets to achieve self - locking.

[0003] The structure of the hook with a spring - type anti - disengaging pawl in the prior art generally consists of three parts: a hook, an anti - disengaging pawl, and a torsion spring. When lifting an item, the item sling presses down the anti - disengaging pawl, and at the same time, the torsion spring is compressed. When the sling completely enters and no longer presses the anti - disengaging pawl, the anti - disengaging pawl resets under the action of the torsion spring and forms a closed loop with the hook to achieve self - locking. Its disadvantage is that the sling cannot be automatically disengaged without external force. When unloading the item, it is necessary to manually press down the pawl to release the item sling. In some scenarios, such as the hoisting process of a large hopper, the distance between the place where the operator can stand and the hook is far, and it is inconvenient to operate when releasing the sling. Although some hooks can solve the problem of hook disengagement during the hoisting process of hoisting equipment, the final sling release action still needs to be completed manually during use, and it is still inconvenient to operate in some occasions. Content of the Utility Model

[0004] In order to solve the above problems in the prior art, the utility model provides an anti - disengaging pawl hook that can be automatically opened to solve the above technical problems.

[0005] To achieve the above object, the present utility model provides a detachable hook with an automatically opening anti-disengagement pawl, which includes a hook, an anti-disengagement pawl, a connecting rod, a pressing rod and a release mechanism. The anti-disengagement pawl is rotatably arranged at the neck of the hook, and when the anti-disengagement pawl rotates, one end thereof can abut against the end of the hook to close the mouth of the hook. Both ends of the connecting rod are respectively connected to the anti-disengagement pawl and the pressing rod through hinge structures. One end of the pressing rod is connected to the mouth of the hook through an elastic reset 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 reset element. When the hook is engaged with the rigging, the rigging presses down the pressing rod, triggering the connecting rod to drive the anti-disengagement pawl to rotate and close the mouth of the hook. When the rigging rises and disengages from the groove of the hook, the pressing rod is reset under the action of the elastic reset element and the release mechanism, and drives the connecting rod to make the anti-disengagement pawl rotate to open the mouth of the hook. Through the cooperation of the anti-disengagement pawl, the connecting rod, the pressing rod and the release mechanism, the detachable hook with an automatically opening anti-disengagement pawl realizes the functions of automatically closing the anti-disengagement pawl of the hook when engaged with the rigging and automatically opening when the rigging disengages, improving the convenience and safety of the hoisting operation and avoiding the inconvenience and potential risks brought by manual operation of the anti-disengagement pawl.

[0006] In some specific embodiments, the hook includes front and rear shells, which cooperate with each other and form an opening groove in the middle of the area where the hook is engaged with the rigging. Both the anti-disengagement pawl and the pressing rod are arranged in the opening groove. The front and rear shell structures of the hook and the design of the opening groove provide a reasonable installation space for the anti-disengagement pawl and the pressing rod, making the layout of each component more compact, facilitating the miniaturization and integration of the whole device, and also better protecting the internal components from the influence of 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 setting, the anti-disengagement pawl can be driven to rotate more smoothly during the force transmission process, optimizing the force transmission path and improving the working efficiency and reliability of the device.

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

[0009] In some specific embodiments, the release mechanism includes 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 includes 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 meshes with the large gear. The escapement mechanism is used to control the rotation speed of the gear pair and includes 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 cooperation of the gear pair, the ratchet mechanism, and the escapement mechanism in the release mechanism can accurately control the reset speed of the pressure rod, thereby realizing the slow opening of the anti-release pawl, ensuring that the anti-release hook pawl can still remain closed when the load has large bumps during the lifting process, and improving the stability and reliability of the device.

[0010] In some specific embodiments, the ratchet mechanism includes a ratchet and a ratchet pawl. The ratchet is fixedly arranged on the first fixed shaft, and the ratchet pawl is fixed on the surface of the large gear. The setting of the ratchet and the ratchet pawl of the ratchet mechanism further ensures the unidirectionality and stability of the gear pair during rotation, enables the device to operate in a predetermined direction and manner during the working process, and avoids the occurrence of abnormal situations such as reverse rotation.

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

[0012] In some specific embodiments, the energy storage mechanism includes a hairspring. The hairspring is arranged on one side of the front and rear shells and is cooperatively connected with the first fixed shaft. As an energy storage mechanism, the hairspring has the characteristics of simple structure and good energy storage effect, can effectively store the energy during the process of pressing down the pressure rod, and release it when needed, providing strong support for the automatic operation of the device.

[0013] In some specific embodiments, the elastic reset element includes a reset spring. Reset spring mounting posts are provided at the opening groove of the mouth of the hook and the front end of the pressure rod. The two ends of the reset spring are respectively cooperatively connected with the reset spring mounting posts.

[0014] In summary, the beneficial effects of the present utility model compared with the prior art are as follows:

[0015] The automatically openable anti - decoupling pawl hook of the present application can achieve the automatic opening of the anti - decoupling device, solving the problem of inconvenience in manually opening the anti - decoupling device in some special occasions; the anti - decoupling pawl can be slowly opened after the lifting is completed without manual operation, and the anti - decoupling pawl can still remain closed when there are large bumps in the load during the lifting process. Brief Description of the Drawings

[0016] The accompanying drawings are included to provide a further understanding of the embodiments and are incorporated into and constitute a part of this specification. The drawings illustrate the embodiments and, together with the description, are used to explain the principles of the present utility model. Other embodiments and many of the expected advantages of the embodiments will be readily recognized, as they become better understood by reference to the following detailed description. By reading the detailed description of the non - restrictive embodiments with reference to the following drawings, other features, objects, and advantages of the present application will become more apparent:

[0017] Figure 1 is a schematic structural view of an automatically openable anti - decoupling pawl hook according to an embodiment of the present utility model;

[0018] Figure 2 is a schematic internal structural view of an automatically openable anti - decoupling pawl hook according to a specific embodiment of the present utility model;

[0019] Figure 3 is a schematic structural view of a release mechanism according to a specific embodiment of the present utility model.

[0020] Reference numerals: 10 - hook, 20 - anti - decoupling pawl, 30 - connecting rod, 40 - pressure 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 of the Embodiments

[0021] In the description of the present utility model, it should be noted that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model.

[0022] In the present utility model, unless otherwise clearly defined and limited, terms such as "installation", "mounting", "connection", "fixation" shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral body; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0023] The following further describes the present application in detail with reference to the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the relevant utility model and do not limit the utility model. Additionally, it should be noted that for the convenience of description, only the parts related to the relevant utility model are shown in the drawings.

[0024] Figure 1 shows a schematic structural diagram of a detachable hook with an automatically opening anti - disengaging pawl according to an embodiment of the present utility model. Combining Figure 2 shows an internal structural diagram of a detachable hook with an automatically opening anti - disengaging pawl according to a specific embodiment of the present utility model. As Figure 1 and 2 shown, the hook with an automatically opening anti - disengaging pawl includes a hook 10, an anti - disengaging pawl 20, a connecting rod 30, a pressing rod 40, an elastic reset element 50, and a release mechanism 60. Among them, the anti - disengaging pawl 20 is fixed to the hook neck through a hinge, enabling it to rotate around the hinge point to realize the opening and closing actions of the hook mouth. The two ends of the connecting rod 30 are respectively connected to the anti - disengaging pawl 20 and the pressing rod 40 through hinge structures. One end of the pressing rod 40 is connected to the opening 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 10 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, triggering the connecting rod 30 to drive the anti - disengaging pawl 20 to rotate and close the mouth of the hook 10. When the rigging rises and disengages 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 - disengaging pawl 20 rotate to open the mouth of the hook.

[0025] In a specific embodiment, the elastic reset element 50 includes a return spring. Return spring mounting posts are provided at the opening groove of the mouth of the hook 10 and the front end of the pressing rod 40, and the two ends of the return spring are respectively connected in cooperation with the return spring mounting posts.

[0026] In a specific embodiment, the hook 10 includes front and rear shells which cooperate with each other and form an opening groove in the middle of the fitting area between the hook 10 and the rigging. The anti - detachment pawl 20 and the pressure rod 40 are both arranged in the opening groove. The front - rear shell structure of the hook 10 and the design of the opening groove provide a reasonable installation space for the anti - detachment pawl 20 and the pressure rod 40, making the layout of each component more compact, which is beneficial to the miniaturization and integration of the entire device. At the same time, it can better protect the internal components from the influence of the external environment.

[0027] 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 pressure rod. The hinge point between the arc - shaped connecting rod and the pressure rod 40 is always located inside the front and rear shells when the pressure 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 drive the anti - detachment pawl to rotate more smoothly during the force transmission process, optimizing the force transmission path and improving the working efficiency and reliability of the device.

[0028] In a specific embodiment, the release mechanism 60 is a key part for realizing the automatic opening and closing functions of the anti - detachment pawl, and 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 hairspring 67. Figure 3 The structural schematic diagram of the release mechanism according to a specific embodiment of the present invention is shown. Combining Figure 3 As shown, the large and small gears of the gear pair 61 are respectively installed on the first fixed shaft 62 and the second fixed shaft 64. The large gear can rotate freely, and the small gear is locked for rotation. This design enables specific rotational speed control during the power transmission process. The ratchet mechanism 63 includes a ratchet and a ratchet pawl. The ratchet is fixed on the first fixed shaft 62, and the ratchet pawl is fixed on the large gear, ensuring the synchronous rotation of the ratchet mechanism and the first fixed shaft 62. The escapement mechanism 66 is used to control the rotational speed of the gear pair, and includes an escapement wheel and an escapement fork. The escapement wheel is fixed on the second fixed shaft 64, and the escapement fork is fixed on the third fixed shaft 65. The precise control of the rotational speed of the first fixed shaft 62 is achieved through the cooperation of the escapement wheel and the escapement fork.

[0029] In a specific embodiment, the release mechanism 60 further includes an energy storage mechanism 67. The energy storage mechanism 67 is disposed on the first fixed shaft and is used to store energy when the pressure lever 40 is pressed down by the rigging, and release the tendency to push the pressure lever to reset when the rigging leaves the pressure lever 40. The setting of the energy storage mechanism 67 enables the pressure lever 40 to store energy when it is pressed down by the rigging, and release energy to push the pressure lever to reset when the rigging leaves, providing a reliable energy source 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. The clockwork spring is disposed on one side of the front and rear casings and is cooperatively 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. It can effectively store the energy during the downward pressing process of the pressure lever 40 and release it when needed, providing strong support for the automatic operation of the device.

[0030] In a specific embodiment, in combination with the foregoing drawings, the basic working process of an automatically openable anti-disengagement pawl hook of the present application is as follows:

[0031] Initial state:

[0032] Under the action of the tension spring, the pressure lever 40 is in the initial position. At this time, the anti-disengagement pawl 20 is in the open state, preparing for the subsequent entry of the rigging. At the same time, the energy storage mechanism 67 has not started to store energy, and each component is in the initial setting of relative rest.

[0033] Rigging downward pressing stage:

[0034] When the rigging presses down the pressure lever 40, the following linkage reactions are triggered: the pressure lever 40 and the first fixed shaft 62 rotate. This rotation is transmitted to the anti-disengagement pawl 20 through the connecting rod 30, driving the anti-disengagement pawl 20 to rotate, so that it forms a closed loop with the hook 10, thereby realizing the anti-disengagement locking of the rigging. The elastic reset element 50 is stretched during the rotation of the pressure lever 40, storing a certain amount of elastic potential energy, providing an energy 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, reserving energy for the subsequent reset process.

[0035] Rigging rising stage:

[0036] When the rigging is raised and no longer applies pressure to the pressure rod 40, the pressure rod 40 rises under the combined action of the elastic reset element 50 and the energy storage mechanism 67. At this time, the ratchet mechanism starts to work. In the ratchet mechanism, the ratchet is fixed on the first fixed shaft 62, and the ratchet pawl is fixed on the large gear. As the first fixed shaft 62 rotates, it drives the large gear to rotate. Since the pinion of the gear pair 61 is locked in rotation, the rotation of the large gear will drive the pinion to rotate in a specific manner. 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 fork is fixed on the third fixed shaft 65. Through the precise control of the escapement mechanism 66, the pressure rod 40 can rise slowly. During the slow rise of the pressure rod 40, through the connection of the connecting rod 30, the anti-disengagement ratchet pawl 20 will also slowly open accordingly and finally return to the initial open state, completing a working cycle.

[0037] In the description of this specification, the description with reference to terms such as "an embodiment", "some embodiments", "examples", "specific examples", or "some examples" 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 utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0038] Although the embodiments of the present utility model have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present utility model. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present utility model.

[0039] The specific implementation manners of the present utility model described above do not constitute a limitation on the protection scope of the present utility model. Any other corresponding changes and deformations made according to the technical concept of the present utility model should be included in the protection scope of the claims of the present utility model.

Claims

1. An automatically openable anti-disengagement pawl hook, characterized in that, It includes a lifting hook, an anti - detachment pawl, a connecting rod, a pressing rod and a release mechanism. The anti - detachment pawl is rotatably arranged at the neck of the lifting hook, and when the anti - detachment pawl rotates, one end thereof can abut against the end of the lifting hook to close the mouth of the lifting hook. Both ends of the connecting rod are respectively connected to the anti - detachment pawl and the pressing rod through hinge structures. One end of the pressing rod is connected to the mouth of the lifting hook through an elastic reset 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 lifting hook in the initial state of the elastic reset element. When the lifting hook cooperates with the rigging, the rigging presses down the pressing rod, triggering the connecting rod to drive the anti - detachment pawl to rotate to close the mouth of the lifting hook. When the rigging rises and disengages from the groove of the lifting hook, the pressing rod resets under the action of the elastic reset element and the release mechanism, and drives the connecting rod to make the anti - detachment pawl rotate to open the mouth of the lifting hook.

2. The automatically openable anti-disengagement pawl hook according to claim 1, wherein, The lifting hook includes front and rear shells, the front and rear shells cooperate with each other and an opening groove is formed in the middle of the cooperation area between the lifting hook and the rigging. The anti - detachment pawl and the pressing rod are both arranged in the opening groove.

3. The automatically openable anti-disengagement pawl hook according to claim 2, characterized in that, 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.

4. The self-opening anti-disengagement pawl hook according to claim 3, characterized in that, The hinge position between the arc - shaped connecting rod and the pressing rod is always located inside the front and rear shells when the pressing rod rotates.

5. The automatically openable anti-disengagement ratchet hook according to claim 2, characterized in that, The release mechanism includes 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 includes 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 meshes with the large gear, and the escapement mechanism is used to control the rotation speed of the gear pair and includes 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.

6. The automatically openable anti-disengagement pawl hook according to claim 5, characterized in that, The ratchet mechanism includes a ratchet and a ratchet pawl. The ratchet is fixedly arranged on the first fixed shaft, and the ratchet pawl is fixed on the surface of the large gear.

7. The automatically openable anti-disengagement pawl hook according to claim 5, characterized in that, The release mechanism further includes an energy storage mechanism. The energy storage mechanism is arranged on the first fixed shaft and is used to store energy when the pressing rod is pressed down by the rigging, and release the tendency to reset the pressing rod when the rigging leaves the pressing rod.

8. The automatically openable anti-disengagement ratchet hook according to claim 7, characterized in that, The energy storage mechanism includes a clockwork spring. The clockwork spring is arranged on one side of the front and rear shells and is cooperatively connected with the first fixed shaft.

9. The automatically openable anti-disengagement pawl hook according to claim 2, wherein, The elastic reset element includes a reset spring. Reset spring mounting posts are arranged at the opening groove of the mouth of the lifting hook and the front end of the pressing rod, and both ends of the reset spring are respectively cooperatively connected with the reset spring mounting posts.

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