A self-locking sling

Abstract

The present application relates to the technical field of lifting appliance, and particularly relates to a self-locking lifting appliance. The self-locking lifting appliance comprises a lifting appliance seat, a pulling sleeve and a plurality of hook claws, wherein the lifting appliance seat and the pulling sleeve are both in a cylindrical shape, and the pulling sleeve is movably matched with the inner cavity of the lifting appliance seat; a plurality of first connecting seats are arranged on the circumferential outer wall of the lifting appliance seat, and a plurality of second connecting seats are arranged on the circumferential outer wall of the pulling sleeve; a connecting hole is arranged at one end of the hook claw, and the connecting hole is movably matched with the first connecting seat; a hinged hole is further arranged on the hook claw, and the hinged hole is hingedly matched with the second connecting seat. In view of the technical problem of poor hoisting effect of the traditional lifting appliance, the lifting appliance seat and the pulling sleeve based on the cylindrical structure are used, and the hook claws are arranged on the circumferences of the lifting appliance seat and the pulling sleeve, so that the end of the shaft component can be inserted into the inner cavity of the pulling sleeve, and better hoisting effect of the shaft component can be achieved.

Description

Technical Field

[0001] This invention relates to the field of lifting equipment technology, and specifically to a self-locking lifting equipment. Background Technology

[0002] During gearbox assembly, a cylindrical shaft needs to be hoisted, but there isn't a suitable hoisting position. Conventional multi-jaw lifting tools are unsuitable for hoisting cylindrical shafts because they typically hinge the ends of the claws directly to a flat structural member. When hoisting shafts, the claws need to contact the shaft shoulder, which is a certain distance from the shaft end. For traditional multi-jaw lifting tools, this distance is essentially the length of the claw in the vertical direction. In other words, when this distance is less than the distance between the shoulder and the shaft end, the traditional lifting tool is unusable. The claw length significantly limits the hoisting of shafts.

[0003] Therefore, the current hoisting method involves a radial through-hole on one shaft. Typically, a metal rod is inserted horizontally into the oil hole during hoisting, and then the metal rod is hoisted using a hook. The hoisting process is complex and prone to slippage, posing safety hazards and quality risks. Summary of the Invention

[0004] The technical problem that the invention aims to solve

[0005] To address the technical problem of poor lifting effect of traditional lifting tools, this invention provides a self-locking lifting tool. It is based on a cylindrical lifting tool base and a pull sleeve, and the hooks are set in the circumference of the lifting tool base and the pull sleeve, so that the end of the shaft component can extend into the inner cavity of the pull sleeve, which can achieve a better lifting effect for the shaft component.

[0006] Technical solution

[0007] To solve the above problems, the technical solution provided by the present invention is as follows:

[0008] A self-locking lifting device includes a lifting device base, a pull sleeve, and several hooks. Both the lifting device base and the pull sleeve are cylindrical, and the pull sleeve is movably engaged with the inner cavity of the lifting device base. Several first connecting seats are provided on the circumferential outer wall of the lifting device base, and several second connecting seats are provided on the circumferential outer wall of the pull sleeve. One end of each hook has a connecting hole, which is movably engaged with the first connecting seat. The hook also has a hinge hole, which is hinged to the second connecting seat.

[0009] Optionally, the hook includes a connecting portion, which is gradually inclined away from the lifting seat from a high position to a low position along the height direction; the connecting hole is located on the connecting portion, and the connecting hole includes a straight slot hole and an inclined slot hole that communicate with each other. The straight slot hole and the inclined slot hole are both used to movably cooperate with the connecting seat. The straight slot hole is located at a high position of the connecting portion, and the inclined slot hole extends along the inclined direction of the connecting portion.

[0010] Optionally, the lifting device base is provided with a pin, and the pull sleeve is provided with a plurality of limiting grooves along the vertical direction, and the pin is matched with the limiting grooves.

[0011] Optionally, the pin includes a fixing member that is fixedly connected to the lifting device seat, the fixing member having a through hole communicating with the limiting groove, and also includes a plug-in member, the end of the plug-in member having a plug-in post, the plug-in post being matched with the through hole and the limiting groove; an elastic member is provided between the plug-in member and the fixing member.

[0012] Optionally, the fixing member includes a limiting block disposed opposite to each other, the limiting block forming a positioning groove, and the plug is provided with a positioning protrusion, the positioning protrusion matching the positioning groove.

[0013] Optionally, the limiting groove is elongated and flat.

[0014] Optionally, the hook is provided with a hooking plane, and the side of the claw tip near the pull sleeve is provided with a conforming curved surface.

[0015] Optionally, the end of the sleeve is provided with a through hole, which communicates with the inner cavity of the sleeve.

[0016] Optionally, a pin is provided between the connecting hole and the first connecting seat, and between the hinge hole and the second connecting seat. Both ends of the pin are provided with guide grooves, and a snap ring is also provided, which is matched with the guide groove.

[0017] Optionally, the lifting device base is provided with a lifting mating seat, which is used to connect with the lifting equipment.

[0018] Beneficial effects

[0019] Compared with the prior art, the technical solution provided by this invention has the following advantages:

[0020] To address the technical problem of poor lifting effect of traditional lifting tools, this invention is based on a cylindrical lifting tool base and a pull sleeve, with hooks set in the circumference of the lifting tool base and the pull sleeve, so that the end of the shaft component can extend into the inner cavity of the pull sleeve, which can achieve a better lifting effect for the shaft component. Attached Figure Description

[0021] Figure 1This is a structural schematic diagram of a self-locking lifting device proposed in an embodiment of the present invention.

[0022] Figure 2 This is a schematic diagram of the pull sleeve structure proposed in an embodiment of the present invention.

[0023] Figure 3 This is a schematic diagram of the hook structure proposed in an embodiment of the present invention.

[0024] Figure 4 This is a schematic diagram of the structure of the pin component proposed in an embodiment of the present invention.

[0025] Figure 5 This is a schematic diagram of the pin and snap ring proposed in an embodiment of the present invention. Detailed Implementation

[0026] To further understand the content of this invention, a detailed description of the invention will be provided in conjunction with the accompanying drawings and embodiments.

[0027] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It is understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings. The terms "first," "second," etc., used in this invention are for the convenience of describing the technical solutions of the invention and have no specific limiting effect; they are all general terms and do not constitute a limitation on the technical solutions of the invention. It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of this application can be combined with each other. In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, not to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. Multiple technical solutions in the same embodiment, as well as multiple technical solutions in different embodiments, can be arranged and combined to form new technical solutions that do not contradict or conflict, all of which are within the scope of protection claimed by this invention.

[0028] Example 1

[0029] Combined with appendix Figure 1-5 This embodiment proposes a self-locking lifting device, including a lifting device base 100, a pull sleeve 101, and a plurality of hooks 102. Both the lifting device base 100 and the pull sleeve 101 are cylindrical, and the pull sleeve 101 is movably engaged with the inner cavity of the lifting device base 100. A plurality of first connecting seats 111 are provided on the circumferential outer wall of the lifting device base 100, and a plurality of second connecting seats 112 are provided on the circumferential outer wall of the pull sleeve 101. One end of each hook 102 is provided with a connecting hole 113, which is movably engaged with the first connecting seat 111. The hook 102 is also provided with a hinge hole 114, which is hinged to the second connecting seat 112.

[0030] This embodiment of a self-locking lifting device is based on a cylindrical lifting device base 100 and a pull sleeve 101, and a hook 102 is disposed in the circumference of the lifting device base 100 and the pull sleeve 101, so that the end of the shaft component can extend into the inner cavity of the pull sleeve 101, which can achieve a better lifting effect for the shaft component.

[0031] This embodiment presents a self-locking lifting device that, compared to traditional multi-jaw lifting devices, is better suited for lifting shaft-like components. Traditional multi-jaw lifting devices typically use claws with the ends directly hinged to a flat structural member. When lifting shaft-like components, the claws need to contact the shaft shoulder, and there is a certain distance between the shoulder and the end of the shaft. Therefore, for traditional multi-jaw lifting devices, the distance from the end of the claw to the flat structural member is essentially the length of the claw in the height direction.

[0032] Understandably, when the distance from the end of the claw of a multi-claw lifting device to the flat structural member, that is, the length of the claw in the height direction, is less than the distance between the shoulder that mates with the claw and the end of the shaft component, traditional lifting devices are completely unusable. In other words, the length of the claw greatly limits the lifting of shaft components.

[0033] This embodiment completely overcomes the above-mentioned problems by improving the traditional lifting device. It features a cylindrical pull sleeve 101 with hooks 102 circumferentially surrounding the sides of the pull sleeve 101 and the lifting device base 100, allowing the end of the shaft-like component to extend into the inner cavity of the pull sleeve 101. The inner cavity has a certain depth, so the distance between the shoulder that mates with the hook 102 and the end of the shaft-like component does not need to be considered. The portion exceeding the length of the hook 102 will extend into the inner cavity of the pull sleeve 101. In contrast, with traditional hook 102 lifting devices, because the claws are directly hinged to a flat structural member, the end of the shaft-like component, if too long, will directly contact the flat structural member, thus failing to effectively lift shaft-like components.

[0034] Furthermore, based on the design of the pull sleeve 101, a further improvement in this embodiment is the installation of a lifting seat 100, which is also cylindrical and fitted onto the outside of the pull sleeve 101. It is conceivable that, due to the inherent characteristics of shaft components, they are prone to swaying during lifting and transportation. If a traditional multi-jaw lifting tool is used, only the claw tips can contact the shaft shoulder, making it impossible to overcome the swaying during transportation, thus posing a significant risk to the lifting process. In this embodiment, the pull sleeve 101, fitted onto one end of the shaft component, already provides a certain degree of sway limitation. Simultaneously, the lifting seat 100, fitted onto the outside of the pull sleeve 101, further limits the swaying of the pull sleeve 101. Therefore, for shaft components, the pull sleeve 101 and the lifting seat 100 provide a dual sway limitation effect.

[0035] In this embodiment, the connecting hole 113 on the hook 102 is movably engaged with the first connecting seat 111, and the hinge hole 114 is hinged with the second connecting seat 112. When the hook 102 is working, the pull sleeve 101 slides into the lifting seat 100, the hook 102 opens, and after the shaft component is in place, the shaft end extends into the pull sleeve 101, and the hook 102 hooks the shaft shoulder. The shaft component, the pull sleeve 101, and the hook 102 slide downward under the action of gravity. At this time, as long as it is in the lifting state, the hook 102 will not loosen, thus achieving self-locking.

[0036] The self-locking lifting device of this embodiment is suitable for lifting shaft components. It can effectively lock shaft components and can effectively prevent them from falling off by gravity self-locking, thus improving safety.

[0037] Example 2

[0038] Combined with appendix Figure 1-5This embodiment proposes a self-locking lifting device, which can be improved based on the above embodiment as follows: The hook 102 includes a connecting portion 120, which is gradually inclined away from the lifting device base 100 from a high position to a low position along the height direction; the connecting hole 113 is located on the connecting portion 120, and the connecting hole 113 includes a straight slot hole 121 and an inclined slot hole 122 that are interconnected. Both the straight slot hole 121 and the inclined slot hole 122 are used to movably cooperate with the connecting base. The straight slot hole 121 is located at a high position of the connecting portion 120, and the inclined slot hole 122 extends along the inclined direction of the connecting portion 120. This embodiment is one way of setting the hook 102. The connecting portion 120 of the hook 102 is used to connect with the first connecting base 111. The hook 102 needs to be able to open and close, so the shape of the connecting hole 113 is set. The connecting hole 113 includes a straight slot 121 and an oblique slot 122 that are interconnected. When the hook 102 is fully retracted, the straight slot 121 engages with the first connecting seat 111, ensuring that the hook 102 is in a vertical position, thereby achieving a better self-locking effect. The connecting hole 113 also includes the oblique slot 122, which extends along the inclined direction of the connecting part 120, allowing the hook 102 to open when the pull sleeve 101 slides into the lifting seat 100.

[0039] Example 3

[0040] Combined with appendix Figure 1-5 This embodiment proposes a self-locking lifting device, which can be improved based on the above embodiment as follows: A pin 130 is provided on the lifting device base 100, and several limiting grooves 131 are provided on the pull sleeve 101 along the vertical direction. The pin 130 is matched with the limiting grooves 131. This embodiment further provides a pin 130, which matches the limiting grooves 131, to achieve a limited slippage effect between the lifting device base 100 and the pull sleeve 101, further improving safety based on the aforementioned self-locking effect.

[0041] Example 4

[0042] Combined with appendix Figure 1-5This embodiment proposes a self-locking lifting device, which can be improved based on the above embodiment as follows: The pin 130 includes a fixing member 132 fixedly connected to the lifting device base 100. The fixing member 132 is provided with a through hole communicating with the limiting groove 131. It also includes a connector 133. The end of the connector 133 is provided with a connector post 134. The connector post 134 is matched with the through hole and the limiting groove 131. An elastic element is provided between the connector 133 and the fixing member 132. This embodiment is one way of setting the pin 130. The connector 133 utilizes the elastic force of the elastic element to make the connector post 134 always tend to move towards the limiting groove 131, so as to further improve the use effect of the connector 133 and further improve the self-locking effect.

[0043] Example 5

[0044] Combined with appendix Figure 1-5 This embodiment proposes a self-locking lifting device, which can be improved based on the above embodiment as follows: The fixing member 132 includes opposing limiting blocks 135, which form a positioning groove between each other. The plug-in member 133 is provided with a positioning protrusion 136, which is matched with the positioning groove. In this embodiment, the matching of the positioning protrusion 136 with the positioning groove helps to prevent the fixing member 132 and the plug-in member 133 from shaking, ensuring the stability between the fixing member 132 and the plug-in member 133, and thus making the engagement between the pin member 130 and the limiting groove 131 more stable.

[0045] Example 6

[0046] Combined with appendix Figure 1-5 This embodiment proposes a self-locking lifting device, which can be improved on the basis of the above embodiment as follows: the limiting groove 131 is flat and elongated. Since the pin 130 needs to be inserted into the limiting groove 131, the limiting groove 131 is flat and elongated in the circumferential direction of the sleeve 101, which makes it easier for the pin 130 and the limiting groove 131 to cooperate.

[0047] Example 7

[0048] Combined with appendix Figure 1-5This embodiment proposes a self-locking lifting device, which can be improved based on the above embodiment as follows: The hook 102 is provided with a hooking plane 140, and the side of the claw tip near the pull sleeve 101 is provided with a conforming curved surface 141. This embodiment is one way of setting the hook 102, wherein the hooking plane 140 serves a supporting function, used to contact the shoulder of the shaft component, and used to hook the plane position of the shoulder. Since the shaft component is generally cylindrical, the side of the claw tip near the pull sleeve 101 is provided with a conforming curved surface 141 to conform to the outer surface of the shaft component, making the contact between the hook 102 and the shaft component more stable.

[0049] Example 8

[0050] Combined with appendix Figure 1-5 This embodiment proposes a self-locking lifting device, which can be improved based on the above embodiment as follows: A through hole 110 is provided at the end of the pull sleeve 101, and the through hole 110 communicates with the inner cavity of the pull sleeve 101. During the process of the shaft component extending into the pull sleeve 101, the air inside the pull sleeve 101 is compressed, and the air needs time to be expelled; similarly, during the process of the shaft component extending out of the pull sleeve 101, the air flowing into the pull sleeve 101 also needs time. Due to the imbalance of air pressure, the time for inserting or removing the shaft component will be too long, prolonging the overall lifting time. Therefore, a through hole 110 is provided at the end of the pull sleeve 101 to expel air more quickly and achieve faster lifting.

[0051] Example 9

[0052] Combined with appendix Figure 1-5 This embodiment proposes a self-locking lifting device, which can be improved on the basis of the above embodiment as follows: a pin 150 is provided between the connecting hole 113 and the first connecting seat 111, and between the hinge hole 114 and the second connecting seat 112. Both ends of the pin 150 are provided with guide grooves 151, and a snap ring 152 is also included. The snap ring 152 is matched with the guide groove 151.

[0053] Example 10

[0054] Combined with appendix Figure 1-5 This embodiment proposes a self-locking lifting device, which can be improved based on the above embodiment as follows: A lifting mating seat 103 is provided on the lifting device base 100, and the lifting mating seat 103 is used to connect with lifting equipment. In this embodiment, by providing the lifting mating seat 103 on the lifting device base 100, the lifting mating seat 103 can be provided with structures such as mounting holes to ensure that the lifting device base 100 can be connected to lifting equipment such as gantry cranes.

[0055] The present invention and its embodiments have been described above illustratively. This description is not restrictive, and the figures shown are only one embodiment of the present invention; the actual structure is not limited thereto. Therefore, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A self-locking sling, characterized in that, The device includes a lifting base, a sleeve, and several hooks. Both the lifting base and the sleeve are cylindrical, and the sleeve is movably fitted with the inner cavity of the lifting base. Several first connecting seats are provided on the outer circumferential wall of the lifting base, and several second connecting seats are provided on the outer circumferential wall of the sleeve. One end of each hook has a connecting hole, which is movably fitted with the first connecting seat. The hook also has a hinge hole, which is hinged to the second connecting seat. The hook includes a connecting part, which is gradually inclined away from the lifting seat from a high position to a low position along the height direction; the connecting hole is located on the connecting part, and the connecting hole includes a straight slot hole and an inclined slot hole that are interconnected. The straight slot hole and the inclined slot hole are both used to move and cooperate with the connecting seat. The straight slot hole is located at a high position of the connecting part, and the inclined slot hole extends along the inclined direction of the connecting part.

2. A self-locking sling according to claim 1, characterized in that The lifting device base is provided with a pin, and the pull sleeve is provided with a number of limiting grooves along the vertical direction. The pin is matched with the limiting grooves.

3. A self-locking sling according to claim 2, characterised in that The pin assembly includes a fixing member that is fixedly connected to the lifting device base. The fixing member has a through hole communicating with the limiting groove. It also includes a plug-in member. The plug-in member has a plug-in post at its end. The plug-in post is matched with the through hole and the limiting groove. An elastic member is provided between the plug-in member and the fixing member.

4. A self-locking sling according to claim 3, wherein The fastener includes opposing limiting blocks that form a positioning groove between each other. The connector is provided with a positioning protrusion that matches the positioning groove.

5. The self-locking sling of claim 2, wherein, The limiting groove is flat and elongated.

6. The self-locking sling of claim 1, wherein, The hook has a hooking plane, and the side of the hook tip near the pull sleeve has a conforming curved surface.

7. The self-locking sling of claim 1, wherein, The end of the sleeve is provided with a through hole, which communicates with the inner cavity of the sleeve.

8. The self-locking sling of claim 1, wherein, A pin is provided between the connecting hole and the first connecting seat, and between the hinge hole and the second connecting seat. Both ends of the pin are provided with guide grooves, and a snap ring is also provided, which is matched with the guide groove.

9. The self-locking sling of claim 1, wherein, The lifting device base is equipped with a lifting mating seat, which is used to connect with the lifting equipment.

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