Threaded transmission mechanism and connection device

Abstract

The present application relates to the technical field of threaded transmission, and provides a threaded transmission mechanism and a connecting device, the threaded transmission mechanism comprising a first component and a second component connected through a threaded pair, the first component comprising a component main body, a movable piece and a locking assembly, the component main body being provided with threads adapted to the second component, one of the end of the component main body and the movable piece being sleeved on the other in a reciprocating sliding manner, the end of the movable piece away from the component main body having an abutting part abutting against the end of the second component; the locking assembly being capable of at least limiting the sliding of the movable piece away from the component main body in the locked state, and being capable of at least allowing the sliding of the movable piece away from the component main body in the unlocked state. Thus, when the pre-tightening force is too large due to excessive torque, the locking assembly is switched to the unlocked state, and the pre-tightening force between the first component and the second component can be released, thereby solving the problem of the jamming of the threaded transmission mechanism without causing structural damage.

Description

Technical Field

[0001] This invention relates to the field of threaded transmission technology, and in particular to a threaded transmission mechanism and connecting device. Background Technology

[0002] Threaded drives are a technology that uses threaded pairs (i.e., the mating of internal and external threads) to achieve mechanical motion or force transmission. They offer advantages such as reliable operation and high efficiency, and can work in harsh environments including high temperature, humidity, dust, and pollution, making them widely used in various mechanical equipment. In threaded drive mechanisms, torque needs to be applied to rotating components to make them rotate. In some cases, excessive torque applied to the rotating components can cause excessive preload between the internal and external threads of the threaded drive mechanism, preventing relative rotation and leading to jamming.

[0003] In related technologies, when a threaded drive mechanism jams, destructive methods are often used to resolve the issue, rendering the mechanism unusable. In heavy industry, devices with threaded drive mechanisms are expensive, and destructive methods often result in significant losses.

[0004] Therefore, how to solve the problem of jamming caused by excessive torque in threaded transmission mechanisms in related technologies has become an important technical problem for those skilled in the art to solve. Summary of the Invention

[0005] This invention provides a threaded transmission mechanism and connecting device to solve the jamming defect caused by excessive torque in related technologies.

[0006] This invention provides a threaded transmission mechanism, including a first component and a second component, wherein the first component and the second component are connected by a threaded pair, and the first component includes: The main body of the component is provided with threads that are compatible with the second component; A movable component, wherein one of the ends of the main body of the component and the movable component is reciprocally slidably fitted onto the outside of the other, and the end of the movable component away from the main body of the component has an abutment portion adapted to abut against the end of the second component; A locking component is disposed on the movable member, the locking component being switchable between a locked state and an unlocked state. In the locked state, the locking component is at least able to restrict the movable member from sliding in a direction away from the main body of the component. In the unlocked state, the locking component is at least able to allow the movable member to slide in a direction away from the main body of the component.

[0007] According to a threaded transmission mechanism provided by the present invention, a first locking groove is provided on the circumferential sidewall of the main component facing the movable member, and a second locking groove is provided on the circumferential sidewall of the movable member facing the main component; the locking assembly includes: A locking ring is adapted to expand or contract under radial force and recover its deformation under the radial force. The locking ring is located in a first locking groove and a second locking groove, which are adapted to allow the locking ring to slide along the axial direction of the threaded pair and to allow the locking ring to expand or contract. At least part of the end of the locking ring away from the abutment portion abuts against the movable member. When the end of the locking ring near the abutment portion abuts against the component body, the locking ring interacts with the component body to cause the locking ring to deform radially away from the component body along the threaded pair. A locking element is threadedly connected to the movable element, and the end of the locking element is adapted to abut against the side wall of the locking ring.

[0008] According to a threaded transmission mechanism provided by the present invention, the threaded pair includes an internal thread and an external thread, the internal thread is disposed on the main body of the component, the external thread is disposed on the second component, and the movable part is sleeved on the outside of the main body of the component.

[0009] According to a threaded transmission mechanism provided by the present invention, the surface of the locking ring at one end away from the abutment is perpendicular to the axis of the threaded pair, and one sidewall of the second locking groove away from the abutment is perpendicular to the axis of the threaded pair; The locking ring has a first surface near the abutment portion, which is adapted to abut against the main body of the component. The generatrix of the first surface is angled to the axis of the threaded pair, and the distance between the generatrix of the first surface and the axis of the threaded pair gradually increases in the direction near the abutment portion; and / or, one sidewall of the first locking groove near the abutment portion is a second surface, the generatrix of the second surface is angled to the axis of the threaded pair, and the distance between the generatrix of the second surface and the axis of the threaded pair gradually increases in the direction near the abutment portion.

[0010] According to a threaded transmission mechanism provided by the present invention, the movable member is provided with a threaded hole, the axial direction of the threaded hole is arranged radially along the threaded pair, and the locking member includes: A stud, the axis of which is arranged radially along the threaded pair, and a torque groove is provided at the end of the stud away from the locking ring.

[0011] According to a threaded transmission mechanism provided by the present invention, in the unlocked state, when the locking ring interacts with the main body of the component and undergoes maximum expansion deformation or maximum contraction deformation, the projection area of ​​the locking ring along the axial direction of the threaded pair is located outside the projection area of ​​the first locking groove.

[0012] According to the threaded transmission mechanism provided by the present invention, the locking element is made of low-carbon alloy steel or copper.

[0013] According to a threaded transmission mechanism provided by the present invention, the locking element includes: A first locking member and a second locking member, wherein the structural strength of the first locking member is greater than that of the second locking member, and either the first locking member or the second locking member can be threadedly connected to the movable member.

[0014] According to a threaded transmission mechanism provided by the present invention, at least two locking members are provided, and each locking member is evenly distributed along the circumference of the movable member.

[0015] The present invention also provides a connecting device, including the above-described threaded transmission mechanism.

[0016] The threaded transmission mechanism provided by this invention includes a first component and a second component, which are connected by a threaded pair. The first component includes a component body, a movable part, and a locking assembly. The component body has a thread adapted to the second component, and the component body and the second component are connected by the threaded transmission. One end of the component body and the movable part can be reciprocally slidably fitted onto the outside of the other. The movable part has an abutment portion at its end away from the component body, which abuts against the end of the second component. The locking assembly is disposed on the movable part and can switch between a locked state and an unlocked state. When the locking assembly is switched to the locked state, it at least restricts the movable part from sliding in a direction away from the component body, ensuring that the movable part and the component body are relatively fixed, thereby generating a certain preload between the first and second components and ensuring their relative stability. When the locking assembly is switched to the unlocked state, it allows the moving part to slide away from the main body of the component. By sliding the moving part relative to the main body, the abutment part disengages from the second component, and the preload between the first component and the second component disappears. This configuration keeps the locking assembly locked during normal operation of the threaded drive mechanism. If the preload between the first and second components becomes excessive due to excessive torque, the locking assembly can be switched to the unlocked state, allowing the moving part to slide away from the main body of the component, disengaging the abutment part from the end of the second component. This releases the preload between the first and second components, allowing them to continue rotating relative to each other, and the threaded drive mechanism can continue to be used. This solves the problem of the threaded drive mechanism jamming without causing structural damage.

[0017] Furthermore, the connecting device provided by the present invention also possesses the various advantages described above due to the threaded transmission mechanism described above. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the threaded transmission mechanism provided by the present invention.

[0020] Figure 2 This is a schematic diagram of the structure when the moving part, the locking ring, and the sidewall of the first locking groove interact with each other, as provided by the present invention.

[0021] Figure 3This is a schematic diagram of the threaded transmission mechanism provided by the present invention when the locking element is damaged, causing the main body of the component to be forcibly separated from the moving part.

[0022] Figure 4 This is a schematic diagram showing the relative positions of the locking member and the locking ring provided by the present invention.

[0023] Figure 5 This is a schematic diagram of the structure of the connecting device provided by the present invention before it is connected to the underwater operation equipment (the locking ring of the connecting device is not inserted into the locking groove of the underwater operation equipment).

[0024] Figure 6 This is a schematic diagram of the structure of the connecting device provided by the present invention when it is connected to the underwater operation equipment (the locking ring of the connecting device enters the locking groove of the underwater operation equipment).

[0025] Figure 7 This is a structural diagram of the connecting device provided by the present invention during emergency separation from underwater operating equipment (the locking part of the connecting device is damaged, and the moving part and the locking ring are separated from the main body of the component).

[0026] Figure label: 1. Second component; 2. Component body; 3. Moving part; 4. Abutment part; 5. First locking groove; 6. Locking ring; 7. Locking element; 8. Underwater operation equipment; 9. Mandrel; 10. Locking ring; 11. Sliding block. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0028] In fields such as scientific research and marine engineering, underwater work equipment 8 is often required to perform specific tasks in the aquatic environment. When underwater work equipment 8 enters or exits the aquatic environment, it often needs to be lifted by lifting equipment. When lifting equipment lifts underwater work equipment 8, a connecting device is needed to connect the lifting equipment to the underwater work equipment 8.

[0029] When using underwater work equipment 8 for underwater operations, it is necessary to first connect underwater work equipment 8 to the connecting device on the surface of the water, thus connecting underwater work equipment 8 to the lifting equipment. The lifting equipment can then be used to send underwater work equipment 8 underwater. When underwater work equipment 8 reaches the target underwater location, the connecting device needs to be disconnected from underwater work equipment 8, and underwater work equipment 8 can then begin underwater operations. After underwater work equipment 8 has completed its operations, the lifting equipment is used to send the connecting device underwater, connecting it to underwater work equipment 8 to establish a connection between underwater work equipment 8 and the lifting equipment. Then, the lifting equipment is used to lift underwater work equipment 8 back to the surface. Once underwater work equipment 8 is on the surface, it can be disconnected from the connecting device, and the lifting equipment can then perform other operations.

[0030] The connecting device includes at least a mandrel 9, an inner cylinder, an outer cylinder, and a locking ring 10. The inner cylinder is fitted over the mandrel 9, and the outer cylinder is fitted over the inner cylinder. The outer cylinder and the inner cylinder are connected by a threaded joint. A circumferential force transmission component is provided between the inner cylinder and the mandrel 9, enabling the transmission of circumferential torque between the mandrel 9 and the inner cylinder. Of the three components—mandrel 9, inner cylinder, and outer cylinder—the outer cylinder is fixed and can only rotate relative to its fixed axis. The mandrel 9 and the outer cylinder do not move relative to each other along the axis of the threaded joint. The mandrel 9 drives the inner cylinder to rotate, and the inner cylinder, under the action of the threaded joint with the outer cylinder, will also move relative to the outer cylinder along the axis of the threaded joint. The locking ring 10 is an open ring fitted over the outer cylinder. The outer cylinder has a sliding hole, and a slider 11 is installed in the sliding hole. When the inner cylinder moves relative to the outer cylinder along the axis of the threaded joint, it pushes the slider 11 to slide, causing the locking ring 10 to expand and deform. When the inner cylinder is displaced in the opposite direction to the outer cylinder along the axis of the threaded pair, the locking ring 10 can recover its deformation.

[0031] The underwater operation equipment 8 has a connecting end for connecting to the aforementioned connecting device. The connecting end has a hollow cylindrical structure, and the end of the outer cylinder can extend into the connecting end of the underwater operation equipment 8. The inner wall of the connecting end of the cylindrical structure has a locking groove for the locking ring 10 to be inserted.

[0032] When connecting the underwater operation equipment 8 to the connecting device, first insert the end of the outer cylinder into the connecting end of the underwater operation equipment 8 to fix the outer cylinder relative to the underwater operation equipment 8. Then, the spindle 9 drives the inner cylinder to rotate relative to the outer cylinder. When the inner cylinder moves relative to the outer cylinder along the axial direction of the threaded pair, it drives the locking ring 10 to expand and deform until the locking ring 10 is embedded in the locking groove in the connecting end of the underwater operation equipment 8, thus completing the connection between the connecting device and the underwater operation equipment 8.

[0033] When it is necessary to disconnect the underwater operation equipment 8 from the connecting device, the spindle 9 is required to drive the inner cylinder to rotate in the opposite direction relative to the outer cylinder. The inner cylinder is displaced in the opposite direction relative to the outer cylinder along the axis of the threaded pair. The locking ring 10 can recover its deformation and is completely located outside the locking groove of the connecting end of the underwater operation equipment 8. At this time, the connecting device and the underwater operation equipment 8 have been disconnected. Applying force along the axis of the threaded pair can separate the connecting device from the underwater operation equipment 8.

[0034] Since the rotational power of the mandrel 9 is generally provided by the power system, there is a possibility that the torque provided by the power system to the mandrel 9 is too large. When the locking ring 10 is embedded in the locking groove, the inner cylinder has already been displaced to its limit relative to the outer cylinder. If the torque applied by the power system to the mandrel 9 is too large, it will cause an excessive preload between the outer cylinder and the inner cylinder, making it extremely difficult, or even impossible, for the inner cylinder to rotate relative to the outer cylinder. As a result, the underwater work equipment 8 cannot be disengaged from the connecting device, and the underwater work equipment 8 cannot perform its operations.

[0035] In the existing technology, when solving the problem that the underwater operation equipment 8 and the connecting device cannot be disconnected, destructive means are often used, which leads to structural damage to the connecting device, or even damage to the connecting end structure of the underwater operation equipment 8, making the connecting device or the underwater operation equipment 8 unusable. The cost of solving the problem is extremely high.

[0036] The threaded transmission mechanism provided in this embodiment of the invention can solve the above problems without damaging the connecting device and the underwater operation equipment 8.

[0037] The following is combined with Figures 1 to 7 The threaded transmission mechanism of the present invention is described, and the dotted lines in each figure represent the axis of the threaded pair.

[0038] like Figures 1 to 7 As shown, the threaded transmission mechanism provided in this embodiment of the invention includes a first component and a second component 1, which are connected by a threaded pair. In this embodiment, when the threaded transmission mechanism is applied to a connecting device, one of the first component and the second component 1 can correspond to the inner cylinder described above for connection with the mandrel, and the other can correspond to the outer cylinder described above, and is provided with a locking ring 10 and a slider 11, without being specifically limited.

[0039] Specifically, the first component includes the main body 2, the movable part 3, and the locking assembly.

[0040] The main body 2 is provided with a thread that is compatible with the second component 1, and the main body 2 and the second component 1 are driven by the thread.

[0041] One of the end of the main body 2 and the movable part 3 can be reciprocally slidably fitted onto the outside of the other. The movable part 3 has an abutment part 4 at the end away from the main body 2, which can abut against the end of the second component 1.

[0042] The locking component is located on the movable part 3, and the locking component can switch between the locked state and the unlocked state.

[0043] When the locking assembly switches to the locking state, the locking assembly can at least restrict the movable part 3 from sliding in a direction away from the component body 2, so as to ensure that the movable part 3 is relatively fixed to the component body 2, so that a certain preload can be generated between the first component and the second component 1, and to ensure the relative stability of the first component and the second component 1.

[0044] When the locking assembly is switched to the unlocked state, the locking assembly can at least allow the movable part 3 to slide in a direction away from the component body 2. By sliding the movable part 3 relative to the component body 2, the abutment part 4 is disengaged from the second component 1. At this time, the preload between the first component and the second fastener will disappear.

[0045] With this configuration, the locking assembly remains locked when the threaded transmission mechanism is in normal operation. When the preload between the first component and the second component 1 becomes too high due to excessive torque, the locking assembly can be switched to the unlocked state, allowing the movable part 3 to slide away from the main body 2, thus disengaging the abutment part 4 from the end of the second component 1. This releases the preload between the first component and the second component 1, allowing them to continue rotating relative to each other. The threaded transmission mechanism can continue to be used, thus solving the problem of jamming of the threaded transmission mechanism without causing structural damage.

[0046] In this embodiment of the invention, a first locking groove 5 is provided on the circumferential sidewall of the main component 2 facing the movable component 3, and a second locking groove is provided on the circumferential sidewall of the movable component 3 facing the main component 2. When the movable component 3 and the main component 2 are sleeved together, the opening of the first locking groove 5 corresponds to the opening of the second locking groove, and the first locking groove 5 and the second locking groove are connected to form an annular space.

[0047] The locking assembly includes a locking ring 6 and a locking element 7. The locking ring 6 is an open ring. When subjected to an outward force along its own radial direction, the locking ring 6 can expand and deform outward; when subjected to an inward force along its own radial direction, the locking ring 6 can contract and deform inward. When the radial force on the locking ring 6 disappears, the locking ring 6 returns to its original deformation.

[0048] The locking ring 6 is located in the first locking groove 5 and the second locking groove. The axial cross-sectional area of ​​the annular space formed by the first locking groove 5 and the second locking groove is larger than the axial cross-sectional area of ​​the locking ring 6, so that the first locking groove 5 and the second locking groove allow the locking ring 6 to slide along the axial direction of the threaded pair and allow the locking ring 6 to undergo expansion deformation or contraction deformation.

[0049] The end of the locking ring 6 away from the abutment part 4 at least partially abuts against the moving part 3. That is to say, regardless of whether the locking ring 6 is in its natural state, expanded state or contracted state, at least a portion of the locking ring 6 is located in the second locking groove.

[0050] When the end of the second component 1 abuts against the abutting portion 4 of the first component, the second component 1 exerts a force on the movable component 3 along the axial direction of the threaded pair, causing the movable component 3 to slide away from the component body 2. At this time, the movable component 3 abuts against the end of the locking ring 6 away from the abutting portion 4, and the movable component 3 exerts a force on the locking ring 6 in a direction away from the component body 2, that is, the movable component 3 exerts a force on the locking ring 6 in a direction close to the abutting portion 4. Consequently, the end of the locking ring 6 close to the abutting portion 4 abuts against the frame body.

[0051] At this time, if there are no restrictions around the locking ring 6, the interaction between the locking ring 6 and the component body 2 can cause the locking ring 6 to deform radially away from the component body 2 along the threaded pair. At the same time, under the abutment action of the movable part 3 against the locking ring 6, it slides in the direction close to the abutment part 4. The sliding of the locking ring 6 in the direction close to the abutment part 4 provides space for the movable part 3 to slide in the direction away from the component body 2.

[0052] The aforementioned locking member 7 is disposed on the movable member 3, and the locking member 7 is threadedly connected to the movable member 3. The end of the locking member 7 abuts against the side wall of the locking ring 6. The interaction between the locking member 7 and the side wall of the locking ring 6 can limit the deformation of the locking ring 6 under the force between it and the component body 2. That is to say, the interaction between the locking member 7 and the side wall of the locking ring 6 can limit the deformation of the locking ring 6 in the radial direction away from the component body 2 along the threaded pair, and the sliding movement of the locking ring 6 in the direction close to the abutment part 4 is also limited.

[0053] With this configuration, when the locking ring 6 is in its natural state and the end of the locking member 7 abuts against the side wall of the locking ring 6, it corresponds to the locked state of the locking assembly. When the locking member 7 is rotated out in a direction away from the side wall of the locking ring 6, it corresponds to the unlocked state of the locking assembly.

[0054] In normal operation, the locking ring 6 is in its natural state, with virtually no expansion or contraction deformation, and the end of the locking member 7 abuts against the side wall of the locking ring 6. If the preload between the first component and the second component 1 is excessive due to excessive torque, the locking member 7 can be rotated away from the side wall of the locking ring 6. This allows the locking ring 6 to slide towards the abutment portion 4 under the interaction of the moving member 3 and the main body 2. This allows the moving member 3 to slide away from the main body 2, thereby reducing or even eliminating the abutment force between the moving member 3 and the end of the second component 1, thus releasing the preload between the first component and the second component 1.

[0055] In this embodiment, at least two locking members 7 are provided, and each locking member 7 is evenly distributed along the circumference of the movable member 3. Each locking member 7 interacts with the locking ring 6 at different positions, which is beneficial to the uniform force on the locking ring 6.

[0056] The threaded pair includes internal threads and external threads. In this embodiment, the internal thread is provided on the main body 2 of the component, and the external thread is provided on the second component 1. That is, the main body 2 of the component is located outside the second component 1. The movable part 3 is sleeved on the outside of the main body 2 of the component. At this time, the locking part 7 can be screwed on the outside of the second component 1 for convenient operation.

[0057] It should be noted that when the internal thread is located on the main body 2 and the external thread is located on the second component 1, the locking ring 6 will expand and deform when it interacts with the main body 2. When the internal thread is located on the second component 1 and the external thread is located on the main body 2, the locking ring 6 will contract and deform when it interacts with the main body 2.

[0058] For ease of explanation, the following description will take the example of an internal thread on the main body 2 and an external thread on the second component 1.

[0059] In this embodiment, the surface of the locking ring 6 at the end away from the abutment portion 4 is perpendicular to the axis of the threaded pair. Correspondingly, one sidewall of the second locking groove away from the abutment portion 4 is perpendicular to the axis of the threaded pair. When the movable member 3 abuts against the locking ring 6, the movable member 3 and the locking ring 6 are in surface contact, and the direction of the force between them is parallel to the axis of the threaded pair, which helps to improve the stability of the movable member 3 when sliding relative to the component body 2.

[0060] To ensure that when the locking ring 6 interacts with the component body 2, the locking ring 6 can deform radially away from the component body 2 along the threaded pair, and the locking ring 6 can slide in the direction close to the abutment portion 4 under the abutment action of the moving part 3, the design is made on one end surface of the locking ring 6 close to the abutment portion 4 and / or one side wall of the first locking groove 5 close to the abutment portion 4.

[0061] In some embodiments, the locking ring 6 has a first surface near the abutment portion 4 that can abut against the component body 2. The generatrix of the first surface is set at an angle to the axis of the threaded pair, and the distance between the generatrix of the first surface and the axis of the threaded pair gradually increases in the direction near the abutment portion 4.

[0062] In other embodiments, one sidewall of the first locking groove 5 near the abutment portion 4 is a second surface, the generatrix of the second surface is set at an angle to the axis of the threaded pair, and the distance between the generatrix of the second surface and the axis of the threaded pair gradually increases in the direction near the abutment portion 4.

[0063] In some embodiments, the generatrix of the first surface is parallel to the generatrix of the second surface. Both the generatrix of the first and second surfaces are angled to the axis of the threaded pair. The distance between the generatrix of the first surface and the axis of the threaded pair gradually increases towards the abutment portion 4, and the distance between the generatrix of the second surface and the axis of the threaded pair also gradually increases towards the abutment portion 4. (Refer to...) Figure 2 .

[0064] In this embodiment of the invention, the movable part 3 is provided with threaded holes, the number of which is the same as the number of locking parts 7, and the axial direction of the threaded holes is arranged radially along the threaded pair. The locking part 7 includes a stud, the axial direction of which is arranged radially along the threaded pair. A torque groove is provided at the end of the stud away from the locking ring 6. The torque groove is adapted to be matched with torque tools such as torque wrenches and screwdrivers, so that torque can be applied to the stud using the torque tool, thereby causing the stud to rotate relative to the movable part 3.

[0065] In this embodiment of the invention, when the locking assembly is in the unlocked state, when the locking ring 6 and the main body 2 interact and undergo maximum expansion deformation or minimum contraction deformation, the projection area of ​​the locking ring 6 is located outside the projection area of ​​the first locking groove 5 along the axial direction of the threaded pair.

[0066] In other words, when the locking member 7 does not restrict the locking ring 6, and the second member 1 continuously exerts a large abutting force on the movable member 3, the locking ring 6 can completely disengage from the first locking groove 5 under the action of the member body 2 and the movable member 3. At this time, there is no longer a force between the locking ring 6 and the member body 2 along the axial direction of the threaded pair, and the movable member 3 and the locking ring 6 can completely disengage from the member body 2 along the axial direction of the threaded pair.

[0067] With this configuration, when the connecting device and the underwater operating equipment 8 are separated underwater, if due to unforeseen factors the first component and the second component 1 cannot rotate relative to each other in opposite directions, the first component and the second component 1 can continue to rotate relative to each other in the forward direction. This increases the contact force of the second component 1 against the abutment part 4, and the contact force of the movable part 3 against the locking ring 6 also increases. The deformation of the locking ring 6 under the action of the movable part 3 and the main body 2 also increases, increasing the force of the locking ring 6 on the locking part 7. When the force of the locking ring 6 on the locking part 7 increases to a certain extent, it will destroy the threaded structure between the locking part 7 and the movable part 3, causing the locking part 7 to move away from the main body 2, providing space for the deformation of the locking ring 6, so that the locking ring 6 can completely disengage from the first locking groove 5. When the locking ring 6 completely disengages from the first locking groove 5, the main body 2 can disengage from the movable part 3.

[0068] The movable part 3 has a locking ring 10 connecting the opposite end of the abutment part 4 to the main body 2. The locking ring 10 can be sleeved onto the main body 2 from the end of the main body 2 near the movable part 3. After the movable part 3 is connected to the main body 2, the movable part 3 can restrict the locking ring 10 from sliding along the axis of the threaded pair. After breaking the locking part 7 and completely disengaging the locking ring 6 from the first locking groove 5, the second component 1 and the main body 2 can be moved away from the underwater operating equipment 8 and the movable part 3. At this time, the movable part 3 separates from the main body 2, allowing the locking ring 10 to slide relative to the main body 2 along the axis of the threaded pair. This allows the second component 1 and the main body 2 to detach from the underwater operating equipment 8, the movable part 3, and the locking ring 10, realizing the emergency release of the connecting device from the underwater operating equipment 8.

[0069] In this embodiment, the locking element 7 is made of low-carbon alloy steel or copper.

[0070] Low-carbon alloy steel has high strength, and the threaded structure between it and moving part 3 is not easily damaged, which helps to ensure the reliability of the locking assembly.

[0071] Copper has relatively low strength, and the threaded structure between it and the moving part 3 is relatively easy to damage, making it suitable for situations where emergency release is required.

[0072] The material of the locking component 7 can be selected as needed, and there are no specific restrictions.

[0073] In a further embodiment, the locking member 7 includes a first locking member and a second locking member. The structural strength of the first locking member is greater than that of the second locking member. Either the first locking member or the second locking member can be threadedly connected to the movable member 3.

[0074] The threaded drive mechanism is equipped with two types of locking components 7 with different structural strengths, which can be selected as needed during use.

[0075] Specifically, when it is necessary to raise the underwater work equipment 8 to the surface, the connecting device needs to be connected to the underwater work equipment 8 underwater, and the connecting device needs to be disconnected from the underwater work equipment 8 above the water. Since the disconnection of the connecting device from the underwater work equipment 8 is carried out above the water, if the first component and the second component 1 cannot rotate relative to each other, the locking component 7 can be manually screwed on. Therefore, the first locking component with relatively high structural strength can be selected at this time.

[0076] When it is necessary to send the underwater work equipment 8 underwater, the connecting device needs to be connected to the underwater work equipment 8 on the surface, and then disconnected from the underwater work equipment 8 underwater. Since the disconnection is performed underwater, if the first component and the second component 1 cannot rotate in opposite directions, the locking member 7 cannot be manually tightened; only an emergency release method can be used. Therefore, a second locking member with relatively lower structural strength is required in this situation.

[0077] In other words, when it is necessary to raise the underwater work equipment 8 to the surface, a connecting device with a first locking element is required to connect the underwater work equipment 8; when it is necessary to send the underwater work equipment 8 underwater, a connecting device with a second locking element is required to connect the underwater work equipment 8.

[0078] On the other hand, embodiments of the present invention also provide a connecting device, including the threaded transmission mechanism provided in any of the above embodiments. When the preload of the threaded transmission mechanism provided in any of the above embodiments is too high, it can solve the problem of jamming of the threaded transmission mechanism without structural damage. Therefore, the connecting device in this embodiment has the advantage of being able to smoothly detach from and connect to the connected components such as underwater operating equipment 8. The derivation process of the beneficial effects of the connecting device in the embodiments of the present invention is largely similar to the derivation process of the beneficial effects of the threaded transmission mechanism described above, and therefore will not be repeated here.

[0079] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention 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 of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A threaded transmission mechanism, characterized in that, It includes a first component and a second component (1), the first component and the second component (1) being connected by a threaded pair, the first component comprising: The main body of the component (2) is provided with threads that are compatible with the second component (1); The movable part (3) is able to be reciprocally slidably fitted onto the outside of the other, and the end of the movable part (3) away from the component body (2) has an abutment part (4) adapted to abut against the end of the second component (1); A locking component is provided on the movable member (3). The locking component is switchable between a locked state and an unlocked state. In the locked state, the locking component is at least able to restrict the movable member (3) from sliding in a direction away from the main body (2). In the unlocked state, the locking component is at least able to allow the movable member (3) to slide in a direction away from the main body (2). The main body (2) of the component has a first locking groove (5) on its circumferential sidewall facing the movable part (3), and the movable part (3) has a second locking groove on its circumferential sidewall facing the main body (2). The locking assembly includes: The locking ring (6) is adapted to expand or contract when subjected to radial force and to recover its deformation when the radial force disappears. The locking ring (6) is located in the first locking groove (5) and the second locking groove. The first locking groove (5) and the second locking groove are adapted to allow the locking ring (6) to slide along the axial direction of the threaded pair and to allow the locking ring (6) to expand or contract. At least part of the end of the locking ring (6) away from the abutment (4) abuts against the movable member (3). When the end of the locking ring (6) near the abutment (4) abuts against the component body (2), the locking ring (6) interacts with the component body (2) to cause the locking ring (6) to deform radially away from the component body (2) along the threaded pair. The locking member (7) is threadedly connected to the movable member (3), and the end of the locking member (7) is adapted to abut against the side wall of the locking ring (6).

2. The threaded transmission mechanism according to claim 1, characterized in that, The threaded pair includes an internal thread and an external thread. The internal thread is disposed on the main body of the component (2), the external thread is disposed on the second component (1), and the movable part (3) is sleeved on the outside of the main body of the component (2).

3. The threaded transmission mechanism according to claim 2, characterized in that, The surface of the locking ring (6) at one end away from the abutment (4) is perpendicular to the axis of the threaded pair, and one sidewall of the second locking groove away from the abutment (4) is perpendicular to the axis of the threaded pair; The locking ring (6) has a first surface near the abutment portion (4) that is adapted to abut against the main body (2) of the component. The generatrix of the first surface is set at an angle to the axis of the threaded pair. The distance between the generatrix of the first surface and the axis of the threaded pair gradually increases in the direction near the abutment portion (4). And / or, one sidewall of the first locking groove (5) near the abutment portion (4) is a second surface. The generatrix of the second surface is set at an angle to the axis of the threaded pair. The distance between the generatrix of the second surface and the axis of the threaded pair gradually increases in the direction near the abutment portion (4).

4. The threaded transmission mechanism according to claim 2, characterized in that, The movable part (3) is provided with a threaded hole, the axis of which is arranged radially along the threaded pair, and the locking part (7) includes: The stud has its axis arranged radially along the threaded pair, and a torque groove is provided at the end of the stud away from the locking ring (6).

5. The threaded transmission mechanism according to claim 2, characterized in that, When the locking assembly is in the unlocked state, and the locking ring (6) interacts with the main body (2) to undergo maximum expansion deformation or maximum contraction deformation, the projection area of ​​the locking ring (6) is located outside the projection area of ​​the first locking groove (5) along the axial direction of the threaded pair.

6. The threaded transmission mechanism according to claim 5, characterized in that, The locking component (7) is made of low-carbon alloy steel or copper.

7. The threaded transmission mechanism according to claim 5, characterized in that, The locking element (7) includes: A first locking member and a second locking member, wherein the structural strength of the first locking member is greater than that of the second locking member, and either the first locking member or the second locking member can be threadedly connected to the movable member (3).

8. The threaded transmission mechanism according to any one of claims 2-6, characterized in that, At least two locking members (7) are provided, and each locking member (7) is evenly distributed along the circumference of the movable member (3).

9. A connecting device, characterized in that, Includes the threaded drive mechanism as described in any one of claims 1 to 8.

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