Spin lock device and hanger upper frame

Abstract

The utility model provides a spin lock device and a lifting appliance upper frame, and belongs to the technical field of hoisting lifting appliances. The spin locking device comprises a spin locking rotary table provided with a mounting hole, and a first fixing groove is formed in the inner wall of the mounting hole. The spin lock comprises a rotating rod; the rotating rod is arranged in the mounting hole in a penetrating mode and provided with a second fixing groove, and the second fixing groove and the first fixing groove are oppositely arranged. The locking key is located in the first fixing groove and the second fixing groove, and the rotating rod is fixed to the spin lock rotating disc through the locking key; the fixing piece is arranged on the rotating rod in a sleeving manner so as to prevent the spin lock from falling down; the fixed bearing is fixedly connected with the supporting sleeve of the lifting appliance upper frame, and the rotating rod is arranged in the fixed bearing in a penetrating manner; the fixing piece and the fixing bearing are fixedly connected with the spin lock turntable through a plurality of connecting pieces; and the rotating rod is axially fixed with the spin lock turntable through a fixing piece. According to the invention, the installation time and the requirement for accurate alignment can be reduced, and the operation complexity is reduced.

Description

Technical Field

[0001] This application relates to the technical field of lifting and hoisting equipment, and more particularly to a twistlock device and a lifting and hoisting device mounting system. Background Technology

[0002] Lifting equipment mounting refers to the correct installation and securing of lifting equipment to lifting equipment or structures in order to carry out lifting operations safely and effectively.

[0003] Spreaders can be quickly connected and disconnected using twistlocks, which provide a safe connection method to ensure that the spreader will not accidentally fall off under load.

[0004] However, the existing technology for installing twistlocks and lifting devices is complex. Utility Model Content

[0005] This application provides a twistlock device and a lifting device for mounting, which solves the problem of complex installation methods for twistlocks and lifting devices.

[0006] In a first aspect, embodiments of this application provide a rotary locking device, comprising:

[0007] A rotary locking disc is provided with mounting holes, and the inner wall of the mounting holes is provided with a first fixing groove;

[0008] A rotary lock includes a rotating rod; the rotating rod passes through the mounting hole and is provided with a second fixing groove, the second fixing groove being opposite to the first fixing groove.

[0009] A locking key is located in the first fixing groove and the second fixing groove, and the rotating rod is fixed to the rotary locking disc by the locking key;

[0010] A fixing member is sleeved on the rotating rod, at least a portion of which is located within the mounting hole and fits against the inner wall of the rotary lock disc to prevent the rotary lock from falling.

[0011] A fixed bearing is fixedly connected to the support sleeve of the lifting frame, and the rotating rod passes through the fixed bearing.

[0012] The fixing member and the fixed bearing are fixedly connected to the rotary lock disc through multiple connecting members; the rotating rod is axially fixed to the rotary lock disc through the fixing member.

[0013] In some possible implementations, the rotating rod includes a coaxially arranged insertion portion and a mounting portion, the insertion portion passing through the mounting hole;

[0014] The mounting part is axially fixed to the rotary lock disc by the fixing member.

[0015] In some possible implementations, the mounting portion is provided with an abutting surface facing the insertion portion;

[0016] Along the axial direction of the rotating rod, the first end of the fixing member abuts against the rotary locking disc, and the second end of the fixing member abuts against the abutting surface.

[0017] In some possible implementations, at least a portion of the mounting portion passes through the mounting hole, and a gap is formed between the mounting portion and the inner wall of the mounting hole.

[0018] In some possible implementations, the fastener includes an inner extension and an outer extension connected together, the inner extension being inserted into the gap and the outer extension abutting against the rotary lock disc.

[0019] The upper spherical bearing and the lower spherical bearing are connected by a spherical surface.

[0020] The upper spherical bearing is fixedly connected to the fixing member through the connecting member, and the lower spherical bearing is fixedly connected to the support sleeve.

[0021] In some possible implementations, the fastener includes a plurality of spliced ​​portions arranged circumferentially along the rotating rod, the spliced ​​portions being fixedly connected to the rotary lock disc.

[0022] In some possible implementations, the knob device is provided with a rotary bearing, a first part of which is fixedly connected to the rotary lock disc, and a second part of which is used to connect to the swing arm of the lifting device.

[0023] In some possible implementations, an elastic element is provided between the locking key and the second fixing groove, the elastic element applying a force to the locking key to move toward the first fixing groove.

[0024] Secondly, embodiments of this application provide a lifting device for mounting a lifting frame, including the aforementioned twist-locking device.

[0025] The rotary lock device and lifting device provided in this application embodiment can quickly connect and disconnect the rotary lock device by using the cooperation of the fixing part and the rotary lock turntable, which reduces the installation time and the need for precise alignment. Since it does not require the use of complicated tools for installation and disassembly, the operation complexity is reduced. Attached Figure Description

[0026] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0027] Figure 1 This is a schematic diagram of the installation of a turn-lock nut in the prior art;

[0028] Figure 2 A top view of the spinlock device and lifting device mounted on the frame, as provided in the embodiments of this application;

[0029] Figure 3 for Figure 2 A schematic diagram of the AA section;

[0030] Figure 4 for Figure 3 Detailed image of section A;

[0031] Figure 5 for Figure 2 A schematic diagram of the CC section;

[0032] Figure 6 for Figure 2 A schematic diagram of the DD section;

[0033] Figure 7 for Figure 6 Detailed image of section D;

[0034] Figure 8 This is a schematic diagram of the overall structure of the lifting device on the frame.

[0035] Explanation of reference numerals in the attached figures:

[0036] 001. Twist lock nut;

[0037] 01. Support sleeve; 02. Swing rod;

[0038] 100. Rotary lock disc; 110. Mounting hole; 111. First fixing groove; 120. Rotary bearing;

[0039] 200. Turnlock; 210. Rotating rod; 211. Second fixing groove; 212. Insertion part; 213. Fixing part; 214. Abutment surface; 215. Connecting part; 220. Lock body;

[0040] 300. Lock button;

[0041] 400. Fastener; 401. First splicing part; 402. Second splicing part; 410. Inner extension part; 420. Outer extension part

[0042] 500. Connectors;

[0043] 610, upper spherical bearing; 620, lower spherical bearing.

[0044] The accompanying drawings have illustrated specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to specific embodiments. Detailed Implementation

[0045] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0046] The terms "first," "second," "third," "fourth," etc. (if present) in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a particular order or sequence. It should be understood that such data can be interchanged where appropriate so that embodiments of the application described herein can be implemented, for example, in orders other than those illustrated or described herein. In embodiments of this application, the words "exemplary" or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as "exemplary" or "for example" in this application should not be construed as being more preferred or advantageous than other embodiments or designs. Specifically, the use of the words "exemplary" or "for example" is intended to present the relevant concepts in a concrete manner.

[0047] As mentioned in the background section, reference Figure 1 The existing technology uses a nut locking method to fix the swivel lock to the upper frame of the lifting device. Specifically, a thread is machined on the top of the swivel lock, and the swivel lock is threadedly connected to the swivel lock nut 001. The swivel lock nut 001 supports and fixes the swivel lock to the upper frame of the lifting device.

[0048] Due to limited installation space, the lock nut 001 must be precisely aligned with the bolt and tightened during installation, which requires considerable installation time and skill.

[0049] Furthermore, the machining of threads requires high-precision equipment and processes to ensure that the thread dimensions and shape meet standards, which increases the complexity and cost of manufacturing. Since the threaded portion needs to withstand high loads and wear, high-strength materials are typically used to manufacture the locknut 001, further increasing the machining difficulty. Installing and removing the locknut 001 usually requires specific tools, such as wrenches or torque wrenches, increasing the complexity of operation and reliance on tools. During lifting operations, equipment is subjected to vibration and impact, which may cause the threaded connection to loosen. A loose locknut 001 will reduce the stability and safety of the connection. Frequent impacts and vibrations may cause thread wear or damage, thus affecting the function and lifespan of the locknut 001 and reducing the reliability of the connection.

[0050] In view of this, embodiments of this application provide a twist-lock device and a lifting device for mounting. By using fasteners, the twist-lock device can be quickly connected and disconnected, reducing installation time and the need for precise alignment. Compared to the prior art, which requires customized wrenches of specific sizes, the lack of complex tools for installation and disassembly reduces operational complexity. The design of fasteners and multiple connectors enhances the device's resistance to vibration and impact, improving connection stability. Since it does not rely on traditional customized threaded connections, the need for high-precision thread processing is reduced, lowering manufacturing costs. The modular design facilitates replacement and maintenance, reducing overall costs.

[0051] The technical solution of this application and how the technical solution of this application solves the above-mentioned technical problems are described in detail below with specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments. The embodiments of this application will now be described with reference to the accompanying drawings.

[0052] refer to Figures 2-8 This application provides a rotary lock device, comprising:

[0053] The rotary lock disc 100 is provided with a mounting hole 110, and the inner wall of the mounting hole 110 is provided with a first fixing groove 111.

[0054] It also includes a rotary lock 200, which includes a rotating rod 210; the rotating rod 210 passes through the mounting hole 110 and is provided with a second fixing groove 211, which is arranged opposite to the first fixing groove 111.

[0055] It also includes a locking key 300, located in the first fixing groove 111 and the second fixing groove 211, and the rotating rod 210 is fixed to the rotary lock disc 100 by the locking key 300.

[0056] The fixing member 400 is sleeved on the rotating rod 210. At least a portion of the fixing member 400 is located in the mounting hole 110 and is in contact with the inner wall of the rotary lock disc 100 to prevent the rotary lock 200 from falling.

[0057] A fixed bearing is fixedly connected to the support sleeve 01 of the upper frame of the lifting device, and the rotating rod 210 passes through the fixed bearing.

[0058] The fixing member 400 and the fixed bearing are fixedly connected to the rotary lock disc 100 through multiple connecting members 500; the rotating rod 210 is axially fixed to the rotary lock disc 100 through the fixing member 400.

[0059] It is understood that the rotary lock turntable 100 is the basic structure of the entire device, used to install and fix the rotary lock 200; the locking key 300, through its positioning function in the first fixing groove 111 and the second fixing groove 211, achieves relative fixation between the rotary lock 200 and the rotary lock turntable 100, so that the rotary lock turntable 100 can drive the rotary lock 200 to move synchronously; the fixing member 400 is used to axially fix the rotating rod 210 on the rotary lock turntable 100 to ensure the stability of the rotary lock; the fixed bearing provides a stable support point to prevent unnecessary shaking or loosening of the rotating rod 210 during use.

[0060] By using the fastener 400, the rotary lock device can be quickly connected and disconnected, reducing installation time and the need for precise alignment. Compared to existing technologies that require custom-sized wrenches, the lack of complex tools for installation and disassembly reduces operational complexity. The design of the locking key 300's position in the first fixing groove 111 and the second fixing groove 211 not only ensures the relative connection between the rotating rod 210 and the rotary lock disc 100 and prevents slippage during the movement of the rotary lock disc, but also enables quick mechanical locking, simplifying operation. The design of the fastener 400 and multiple connectors 500 enhances the device's resistance to vibration and impact, improving connection stability. The absence of reliance on traditional custom threaded connections reduces the need for high-precision thread machining, lowering manufacturing costs. The modular design facilitates replacement and maintenance, reducing overall costs.

[0061] In some possible implementations, the rotating rod 210 includes a coaxially arranged insertion part 212 and a mounting part 213, with the insertion part 212 passing through the mounting hole 110.

[0062] Mounting part 213 is axially fixed to rotary lock disc 100 by fastener 400.

[0063] It is known that the insertion part 212 is part of the rotating rod 210, coaxially arranged and passing through the mounting hole 110 of the rotary lock disk. The insertion part 212 is designed to allow the rotating rod 210 to be freely inserted and positioned in the mounting hole 110. The mounting part 213 is located at the other end of the insertion part 212 and is axially fixed to the rotary lock disk 100 by the fastener 400, so as to ensure that the rotating rod 210 is stably fixed in the axial direction.

[0064] For example, the insertion part 212 and the mounting part 213 are integrally formed to increase the installation strength.

[0065] By using the design of the plug-in part 212 and the mounting part 213, the need for thread machining is reduced, and the manufacturing complexity and cost are lowered. The design of the plug-in part 212 allows the rotating rod 210 to be quickly inserted into the mounting hole 110 without the need to align the threads, simplifying the installation steps. The mounting part 213 is axially fixed by the fastener 400, reducing the risk of loosening due to vibration and impact and improving the stability of the connection. No special tools are required for thread alignment and installation, reducing dependence on tools and reducing operational complexity.

[0066] refer to Figure 4 In some possible implementations, the mounting part 213 is provided with an abutment surface 214 facing the insertion part 212.

[0067] In the axial direction of the rotating rod 210, the first end of the fixing member 400 abuts against the rotary locking disc 100, and the second end of the fixing member 400 abuts against the abutment surface 214.

[0068] It is understood that the design of the contact surface 214 ensures that the mounting part 213 can form a stable contact surface with the fastener 400 during the installation process; the first end of the fastener 400 abuts against the rotary lock disc 100, ensuring the stability of the fastener 400 on one side of the rotary lock disc 100; the second end of the fastener 400 abuts against the contact surface 214 of the mounting part 213, providing fixation and support on the other side of the rotating rod 210.

[0069] The gap design allows for some adjustment space within the mounting hole 110, reducing the need for precise alignment and simplifying the installation process; the design of the abutment surface 214 ensures stable contact between the fastener 400 and the mounting part 213, reducing installation difficulty; the double abutment design ensures stability under load and reduces the risk of loosening.

[0070] In some possible implementations, at least a portion of the mounting portion 213 passes through the mounting hole 110, and a gap is formed between the mounting portion 213 and the inner wall of the mounting hole 110.

[0071] In some possible implementations, the fastener 400 includes an inner extension 410 and an outer extension 420 connected to each other, with the inner extension 410 inserted into the gap and the outer extension 420 abutting against the rotary lock disc 100.

[0072] The gap formed between the mounting part 213 and the inner wall of the mounting hole 110 provides a certain adjustment space, making it convenient for the fastener 400 to align with the rotary lock disc 100 during installation, simplifying the installation process. The inner extension 410 is inserted into this gap, forming a plug-in structure between the fastener 400 and the gap. The fastener 400 provides additional support while firmly securing the rotating rod 210 and the rotary lock disc 100 together. The inner extension 410 effectively restricts the radial movement of the mounting part 213, preventing loosening due to vibration and impact. The presence of the inner extension 410 helps to disperse stress concentration caused by load and vibration, reducing the risk of structural fatigue. The outer extension 420 abuts against the rotary lock disc 100, ensuring a secure connection between the fastener 400 and the rotary lock disc 100.

[0073] By providing a gap between the mounting portion 213 and the mounting hole 110, the need for precise alignment is reduced, allowing for faster and more flexible installation; the inner extension 410, inserted into the gap, provides additional support, prevents loosening due to vibration and impact, and improves the stability of the connection.

[0074] In some embodiments, the rotating rod 210 preferably includes a connecting portion 215 that is coaxially disposed with the insertion portion 212 and the mounting portion 213;

[0075] The twist lock also includes a lock body 220, which is used to connect the lifting device, and a connecting part 215 is fixedly connected to the lock body.

[0076] In some embodiments, the diameter of the mounting portion 213 is smaller than the diameter of the insertion portion 212 and the connecting portion 215.

[0077] It is understood that the diameter of the mounting part 213 is smaller than that of the insertion part 212 and the connecting part 215, so that the fastener 400 can be locked between the mounting part 213 and the inner wall of the mounting hole 110 to form a gap, the lower edge of the insertion part 212 and the upper edge of the connecting part 215, further preventing the rotating rod 210 from moving axially and ensuring the stability of the device.

[0078] In some possible implementations, the fixed bearing includes an upper spherical bearing 610 and a lower spherical bearing 620, with the upper spherical bearing 610 and the lower spherical bearing 620 having a spherical fit on their contact surfaces.

[0079] The upper spherical bearing 610 is fixedly connected to the fixing member 400 via the connector 500, and the lower spherical bearing 620 is fixedly connected to the support sleeve 01.

[0080] It is known that the lower spherical bearing 620 is fixedly connected to the support sleeve 01, so that the fixed bearing is stably connected on the upper frame of the lifting device, providing a support point for the rotating rod 210; the upper spherical bearing 610 and the lower spherical bearing 620 are connected by a spherical surface, and the upper spherical bearing 610 provides a flexible connection point, so that the rotating rod 210 passing through it can maintain its rotational performance while being stably supported.

[0081] The spherical fit allows the upper spherical bearing 610 and the lower spherical bearing 620 to automatically align during installation, reducing the need for precise alignment and simplifying the installation process. The spherical fit design can accommodate slight deviations that may occur during installation, improving the adaptability of the installation. The spherical fit can absorb a certain amount of vibration and impact, reducing stress concentration on the connecting parts and enhancing the stability of the system. The modular design of the upper spherical bearing 610 and the lower spherical bearing 620 facilitates manufacturing and maintenance, reducing the complexity of the overall structure.

[0082] In some possible implementations, the fastener 400 includes a plurality of splicing portions arranged circumferentially along the rotating rod 210, the splicing portions being fixedly connected to the rotary lock disc 100.

[0083] refer to Figure 5 In some possible implementations, the splicing portion includes at least a first splicing portion 401 and a second splicing portion 402.

[0084] In this way, multiple splicing parts are arranged circumferentially along the rotating rod, providing uniform support, reducing stress concentration at single points, and improving overall stability. The fixed connection of multiple splicing parts enhances the connection strength between the fixing member 400 and the rotary lock disc 100, preventing loosening. Since the splicing parts provide multi-point fixation, the need for precise alignment is reduced, simplifying the installation steps. The design of multiple splicing parts improves the device's resistance to vibration and impact, reducing the risk of loosening.

[0085] In some possible implementations, the connector 500 is a long bolt. In use, the rotary lock disc 100, the fixing member 400, and the upper spherical bearing 610 have corresponding mounting screw holes. The direction of the mounting screw holes is parallel to the axis of the rotating rod 210. The connector 500 passes through the screw holes of the rotary lock disc 100, the fixing member 400, and the upper spherical bearing 610 in sequence, so that the rotary lock 200 is fixed to the rotary lock disc 100, the fixing member 400, and the upper spherical bearing 610.

[0086] In this way, using long bolts as connectors 500 simplifies the installation process, reduces installation time and skill requirements, and provides a strong mechanical connection, ensuring the stability between the rotary lock disc 100, the fastener 400 and the upper spherical bearing 610.

[0087] refer toFigure 4 In some possible implementations, the knob device is provided with a rotary bearing 120, the first part of which is fixedly connected to the rotary lock disc 100, and the second part of which is used to connect to the swing arm 02 of the lifting device.

[0088] It is known that the second part of the rotating bearing 120 is used to connect with the swing arm 02 on the upper frame of the lifting device, so that the rotary lock turntable 100 can have a certain swing range on the swing arm 02, which facilitates the operation of the lifting device.

[0089] The design of the rotary bearing 120 allows the rotary lock turntable 100 to have a certain range of swing on the swing arm 02. This flexibility enables it to better adapt to different working angles and positions during installation and operation, reducing the need for precise alignment and simplifying installation and operation procedures. During lifting operations, the lifting equipment may be subjected to forces and vibrations in various directions. The swing capability of the rotary bearing 120 allows the system to dynamically adapt to these changes, reducing the risk of damage caused by excessive stress. The modular design of the rotary bearing 120 facilitates manufacturing and maintenance, reducing the complexity of the overall structure.

[0090] In some possible implementations, an elastic element is provided between the locking key 300 and the second fixing groove 211, which applies a force to the locking key 300 to move toward the first fixing groove 111.

[0091] The continuous force provided by the elastic element (not shown in the figure) ensures that the locking key is automatically held in the locked position, improving the reliability of the connection; since the elastic element automatically pushes the locking key 300 in the locked position, the need for manual operation is reduced, simplifying the installation and disassembly process.

[0092] In some possible implementations, during installation, the rotating rod 210 passes sequentially through the rotary lock disc 100, the upper spherical bearing 610, and the lower spherical bearing 620, and the insertion part 212 of the rotating rod 210 is inserted into the mounting hole 110 of the rotary lock disc 100. The locking key 300 is aligned with the first fixing groove 111 on the inner wall, and the locking key 300 is pushed into the first fixing groove 111, so that the rotating rod 210 is relatively fixed to the rotary lock disc 100, and the rotating rod 210 will not rotate inside the rotary lock disc 100.

[0093] The first splicing part 401 and the second splicing part 402 are aligned with the mounting part 213 on the upper spherical bearing 610 and spliced ​​together. The inner extension 410 of the first splicing part 401 and the second splicing part 402 is inserted into the gap between the mounting part 213 and the inner wall of the mounting hole 110.

[0094] The rotary lock disc 100, the fixing member 400, the upper spherical bearing 610 and the lower spherical bearing 620 are tightly fitted together, and the mounting screw holes of the rotary lock disc 100, the fixing member 400 and the upper spherical bearing 610 are aligned to ensure that the outer extension 420 of the fixing member 400 abuts against the rotary lock disc 100, and the first end of the fixing member 400 abuts against the rotary lock disc 100, and the second end abuts against the abutting surface 214 of the mounting part 213;

[0095] Use connector 500 to pass through the mounting screw holes of rotary lock disc 100, fastener 400 and upper spherical bearing 610 in sequence, and tighten connector 500 to complete the installation.

[0096] In some possible implementations, a fixing pin is provided in the first fixing groove 111, the shape of the fixing pin conforms to the shape of the first fixing groove 112, and the fixing pin has a receiving groove.

[0097] In some possible embodiments, the first retaining groove 111 has an upward opening to facilitate the installation of the locking key 300.

[0098] The locking component is a locking bolt. The threaded section of the locking bolt passes through the inner wall of the second fixing groove 211 and is threadedly connected to the rotating rod 210. The nut of the locking bolt is located in the receiving groove of the fixing pin (not shown in the figure).

[0099] The combination of retaining pins and locking bolts provides double fixation, enhancing the stability of the connection. The nuts of the locking bolts are secured within the receiving groove to prevent loosening under vibration and impact conditions. The design of the retaining pins reduces the need for precise alignment during installation, simplifying the installation process.

[0100] This application provides a lifting device for mounting a lifting frame, including the aforementioned twist-locking device.

[0101] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0102] In the description of this utility model, it should be understood that the terms "comprising" and "having" as used herein, and any variations thereof, are intended to cover non-exclusive inclusion, for example, a process, method, system, product, or device that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product, or device.

[0103] Unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features.

[0104] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A rotary locking device, characterized in that, include: A rotary locking disc is provided with mounting holes, and the inner wall of the mounting holes is provided with a first fixing groove; A rotary lock includes a rotating rod; the rotating rod passes through the mounting hole and is provided with a second fixing groove, the second fixing groove being opposite to the first fixing groove. A locking key is located in the first fixing groove and the second fixing groove, and the rotating rod is fixed to the rotary locking disc by the locking key; A fixing member is sleeved on the rotating rod, at least a portion of which is located within the mounting hole and fits against the inner wall of the rotary lock disc to prevent the rotary lock from falling. A fixed bearing is fixedly connected to a support sleeve on the upper frame of the lifting device, and the rotating rod passes through the fixed bearing; The fixing member and the fixed bearing are fixedly connected to the rotary lock disc through multiple connecting members; the rotating rod is axially fixed to the rotary lock disc through the fixing member.

2. The rotary locking device according to claim 1, characterized in that, The rotating rod includes a plug-in part and a mounting part arranged coaxially, and the plug-in part passes through the mounting hole; The mounting part is axially fixed to the rotary lock disc by the fixing member.

3. The rotary locking device according to claim 2, characterized in that, The mounting part is provided with an abutting surface, which faces the insertion part; Along the axial direction of the rotating rod, the first end of the fixing member abuts against the rotary locking disc, and the second end of the fixing member abuts against the abutting surface.

4. The rotary locking device according to claim 3, characterized in that, At least a portion of the mounting part passes through the mounting hole, and a gap is formed between the mounting part and the inner wall of the mounting hole.

5. The rotary locking device according to claim 4, characterized in that, The fastener includes an inner extension and an outer extension connected to each other. The inner extension is inserted into the gap, and the outer extension abuts against the rotary locking disc.

6. The rotary locking device according to claim 5, characterized in that, The fixed bearing includes an upper spherical bearing and a lower spherical bearing, wherein the upper spherical bearing and the lower spherical bearing are connected by a spherical surface fit. The upper spherical bearing is fixedly connected to the fixing member through the connecting member, and the lower spherical bearing is fixedly connected to the support sleeve.

7. The rotary locking device according to claim 2, characterized in that, The fastener includes multiple splicing parts arranged circumferentially along the rotating rod, and the splicing parts are fixedly connected to the rotary lock disc.

8. The rotary locking device according to claim 1, characterized in that, The knob device is equipped with a rotating bearing. The first part of the rotating bearing is fixedly connected to the rotary lock disc, and the second part of the bearing is used to connect to the swing arm on the upper frame of the lifting device.

9. The rotary locking device according to any one of claims 1-8, characterized in that, An elastic element is provided between the locking key and the second fixing groove, and the elastic element applies a force to the locking key to move toward the first fixing groove.

10. A lifting device for mounting, characterized in that, Includes the rotary locking device as described in any one of claims 1-9.

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