Thread transmission mechanism and connecting device

Abstract

The invention relates to the technical field of thread transmission, and provides a thread transmission mechanism and a connecting device.The thread transmission mechanism comprises a first component and a second component which are in transmission connection through a thread pair, the first component comprises a component body, a movable part and a locking assembly, and the component body is provided with threads matched with the second component; one of the end part of the component main body and the movable part can be sleeved outside the other one in a reciprocating sliding manner; one end, far away from the component main body, of the movable part is provided with an abutting part which abuts against the end part of the second component; the locking assembly at least can limit the moving part to slide in the direction away from the component body in the locking state, and the locking assembly at least can allow the moving part to slide in the direction away from the component body in the unlocking state. Thus, when the pretightening force is too large due to too large torque, the locking assembly is switched to the unlocking state, the pretightening force between the first component and the second component can be relieved, and the problem that the thread transmission mechanism is stuck is solved under the condition that structural damage is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of threaded transmission, and in particular to a threaded transmission mechanism and a connecting device. Background Art

[0002] Threaded transmission is a technology that uses a threaded pair (i.e., the mating of internal and external threads) to achieve mechanical motion or force transmission. It offers the advantages of reliable operation and high efficiency, and can operate in harsh environments such as high temperature, humidity, dust, and pollution. It is widely used in various mechanical equipment. In threaded transmission mechanisms, torque must be applied to the rotating part to cause it to rotate. In some cases, the torque applied to the rotating part is too great, resulting in excessive preload between the internal and external threads of the threaded transmission mechanism. This prevents the internal and external threads from rotating relative to each other, leading to the threaded transmission mechanism becoming stuck.

[0003] In the related art, when a threaded transmission mechanism gets stuck, destructive measures are often used to solve the problem, making the threaded transmission mechanism unusable. In the heavy industry field, devices with threaded transmission mechanisms are expensive, and destructive measures often result in significant losses.

[0004] Therefore, how to solve the problem of the threaded transmission mechanism being stuck due to excessive torque in the related art has become an important technical problem to be solved by those skilled in the art. Summary of the Invention

[0005] The present invention provides a threaded transmission mechanism and a connecting device, which are used to solve the problem of a threaded transmission mechanism in the related art being stuck due to excessive torque.

[0006] The present invention provides a thread transmission mechanism, comprising a first component and a second component, wherein the first component and the second component are connected through a thread pair, and the first component comprises: A component body provided with threads adapted to the second component; A movable member, wherein one of the end of the component body and the movable member is reciprocatingly slidably sleeved on the outside of the other, and the end of the movable member away from the component body has an abutment portion, and the abutment portion is suitable for abutting against the end of the second component; A locking assembly is provided on the movable part, and the locking assembly can switch between a locked state and an unlocked state. In the locked state, the locking assembly can at least limit the movable part from sliding in a direction away from the component body. In the unlocked state, the locking assembly can at least allow the movable part to slide in a direction away from the component body.

[0007] According to a threaded transmission mechanism provided by the present invention, a first locking groove is provided on a circumferential side wall of the component body facing the movable member, and a second locking groove is provided on a circumferential side wall of the movable member facing the component body. The locking assembly includes: a locking ring adapted to generate expansion deformation or contraction deformation when subjected to a radial force and to restore deformation when subjected to the radial force, the locking ring being located in the first locking groove and the second locking groove, the first locking groove and the second locking groove being adapted to allow the locking ring to slide along the axial direction of the thread pair and to allow the locking ring to generate expansion deformation or contraction deformation, an end of the locking ring away from the abutting portion at least partially abutting against the movable part, and when an end of the locking ring close to the abutting portion abuts against the component body, the locking ring and the component body interact to cause the locking ring to deform away from the component body in the radial direction of the thread pair; A locking member is threadedly connected to the movable member, and an end portion of the locking member is adapted to abut against a side wall of the locking ring.

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

[0009] According to a threaded transmission mechanism provided by the present invention, a surface of the locking ring at one end away from the abutting portion is perpendicular to the axis of the thread pair, and a side wall of the second locking groove away from the abutting portion is perpendicular to the axis of the thread pair; One end of the locking ring close to the abutting portion has a first surface suitable for abutting against the component body, the generatrix of the first surface is set at an angle to the axis of the thread pair, and the distance between the generatrix of the first surface and the axis of the thread pair gradually increases in the direction approaching the abutting portion; and / or, a side wall of the first locking groove close to the abutting portion is a second surface, the generatrix of the second surface is set at an angle to the axis of the thread pair, and the distance between the generatrix of the second surface and the axis of the thread pair gradually increases in the direction approaching the abutting portion.

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

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

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

[0013] According to a threaded transmission mechanism provided by the present invention, the locking member 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 the locking members are evenly distributed along the circumference of the movable member.

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

[0016] The threaded transmission mechanism provided by the present invention includes a first component and a second component, and the first component and the second component are connected by a threaded pair. The first component includes a component body, a movable part and a locking assembly. The component body is provided with a thread that is compatible with the second component, and the component body and the second component are threadedly transmitted. One of the end of the component body and the movable part can be reciprocatingly slidably mounted on the outside of the other, and an abutment portion is provided at the end of the movable part away from the component body, and the abutment portion can abut against the end of the second component. The locking assembly is provided on the movable part, and the locking assembly can switch between a locked state and an unlocked state. When the locking assembly is switched to the locked state, the locking assembly can at least limit the movable part from sliding in a direction away from the component body to ensure that the movable part and the component body are relatively fixed, so that a certain preload force can be generated between the first component and the second component, ensuring the relative stability of the first component and the second component. When the locking assembly is switched to the unlocked state, the locking assembly can at least allow the movable member to slide in a direction away from the main body of the component. By sliding the movable member relative to the main body of the component, the abutment portion and the second member are disengaged. At this time, the preload force between the first member and the second fixture disappears. In this way, when the threaded transmission mechanism is in a normal state, the locking assembly is kept in a locked state. When the preload force between the first member and the second member is too large due to excessive torque in the threaded transmission mechanism, the locking assembly can be switched to the unlocked state, allowing the movable member to slide in a direction away from the main body of the component, causing the abutment portion and the end of the second member to disengage. The preload force between the first member and the second member is released, allowing the first member and the second member to continue to rotate relative to each other, and the threaded transmission mechanism can continue to be used. The problem of the threaded transmission mechanism getting stuck is solved while avoiding structural damage.

[0017] Furthermore, the connection device provided by the present invention also has the various advantages described above because it is provided with the threaded transmission mechanism described above. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction is given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 It is a structural schematic diagram of the thread transmission mechanism provided by the present invention.

[0020] Figure 2 It is a structural schematic diagram of the movable part, the locking ring and the side wall of the first locking groove provided by the present invention interacting with each other.

[0021] Figure 3It is a structural schematic diagram of the threaded transmission mechanism provided by the present invention when the locking member is damaged so that the component body and the movable member are forcibly separated.

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

[0023] Figure 5 This is a schematic structural diagram of the connecting device provided by the present invention before being connected to the underwater operating equipment (the locking ring of the connecting device has not entered the locking groove of the underwater operating equipment).

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

[0025] Figure 7 It is a structural schematic diagram of the connection device provided by the present invention and the underwater operating equipment during emergency release (the locking member of the connection device is damaged, and the movable member and the locking ring are separated from the component body).

[0026] Reference numerals: 1. Second component; 2. Component body; 3. Movable component; 4. Abutment portion; 5. First locking groove; 6. Locking ring; 7. Locking member; 8. Underwater operation equipment; 9. Core shaft; 10. Locking ring; 11. Slider. DETAILED DESCRIPTION

[0027] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0028] In fields such as scientific research and marine engineering, underwater working equipment 8 is often required to perform specific tasks in an aquatic environment. The underwater working equipment 8 often needs to be hoisted by a lifting device when entering and exiting the aquatic environment. When the lifting device hoists the underwater working equipment 8, a connecting device is required to connect the lifting device to the underwater working equipment 8.

[0029] When using the underwater working equipment 8 to perform underwater operations, it is necessary to first connect the underwater working equipment 8 to the connecting device on the surface of the water to connect the underwater working equipment 8 to the lifting device, so that the underwater working equipment 8 can be sent underwater using the lifting device. When the underwater working equipment 8 is sent to the target underwater location, it is necessary to disconnect the connecting device from the underwater working equipment 8, and the underwater working equipment 8 can then begin underwater operations. After the underwater working equipment 8 has completed its operation, the connecting device is sent underwater using the lifting device, and the connecting device is connected to the underwater working equipment 8 underwater to connect the underwater working equipment 8 to the lifting device. The underwater working equipment 8 is then lifted to the surface of the water using the lifting device. After the underwater working equipment 8 is on the surface of the water, the underwater working equipment 8 can be disconnected from the connecting device, and the lifting device can then perform other operations.

[0030] The connecting device comprises at least a core shaft 9, an inner cylinder, an outer cylinder, and a locking ring 10. The inner cylinder is sleeved onto the outer portion of the core shaft 9, while the outer cylinder is sleeved onto the outer portion of the inner cylinder. The outer and inner cylinders are connected by a threaded pair. A circumferential force transmission member is provided between the inner cylinder and the core shaft 9, enabling circumferential torque to be transmitted between the core shaft 9 and the inner cylinder. The outer cylinder is fixed and can only rotate relative to the outer cylinder along a fixed axis. The core shaft 9 and the outer cylinder do not move relative to each other along the axis of the threaded pair. The core shaft 9 drives the inner cylinder to rotate, and the inner cylinder, under the action of the threaded pair, can also move relative to the outer cylinder along the axis of the threaded pair. The locking ring 10 is an open ring that sleeves onto the outer cylinder. The outer cylinder is provided with a sliding hole, and a slider 11 is located within the sliding hole. When the inner cylinder moves relative to the outer cylinder along the axis of the threaded pair, 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 relative to the outer cylinder along the axial direction of the thread pair, the lock ring 10 can recover its deformation.

[0031] The underwater working equipment 8 has a connecting end for connecting to the above-mentioned connecting device. The connecting end is a hollow cylindrical structure, and the end of the outer cylinder can extend into the connecting end of the underwater working equipment 8. The inner side wall of the connecting end of the cylindrical structure has a locking groove, which can accommodate the locking ring 10.

[0032] When connecting the underwater working equipment 8 to the connecting device, first extend the end of the outer cylinder into the connecting end of the underwater working equipment 8 to fix the outer cylinder and the underwater working equipment 8 relatively. Then, drive the core shaft 9 to rotate the inner cylinder relative to the outer cylinder. When the inner cylinder is displaced relative to the outer cylinder along the axial direction of the threaded pair, the lock ring 10 is driven to expand and deform until the lock ring 10 is embedded in the lock groove in the connecting end of the underwater working equipment 8. This completes the connection between the connecting device and the underwater working equipment 8.

[0033] When it is necessary to disconnect the underwater working equipment 8 from the connecting device, it is necessary to make the core shaft 9 drive the inner cylinder to rotate in the opposite direction relative to the outer cylinder, and the inner cylinder is displaced in the opposite direction relative to the outer cylinder along the axial direction of the threaded pair. The locking ring 10 can restore its deformation, and the locking ring 10 is completely located outside the locking groove of the connecting end of the underwater working equipment 8. At this time, the connecting device and the underwater working equipment 8 have been disconnected, and the connecting device can be separated from the underwater working equipment 8 by applying force along the axial direction of the threaded pair.

[0034] Since the rotational power of the core shaft 9 is generally provided by the power system, there is a possibility that the torque provided by the power system to the core shaft 9 is too large. When the lock ring 10 is inserted into the lock groove, the inner cylinder has already moved to the extreme position relative to the outer cylinder. The excessive torque applied by the power system to the core shaft 9 will cause an excessive preload force to be generated between the outer cylinder and the inner cylinder, making it extremely difficult or even impossible to rotate the inner cylinder relative to the outer cylinder. As a result, the underwater working equipment 8 cannot be disconnected from the connecting device, and the underwater working equipment 8 cannot operate.

[0035] In the prior art, when solving the problem that the underwater working equipment 8 cannot be disconnected from the connecting device, destructive means are often used, resulting in structural damage to the connecting device, or even damage to the connecting end structure of the underwater working equipment 8, resulting in the connecting device or the underwater working equipment 8 being unable to continue to be used, and the cost of solving the problem is extremely high.

[0036] The threaded transmission mechanism provided by the embodiment of the present invention can solve the above-mentioned problem while avoiding damage to the connecting device and the underwater operating equipment 8.

[0037] The following combination Figures 1 to 7 The thread transmission mechanism of the present invention is described, and the dot-dashed line in each figure is the axis of the thread pair.

[0038] like Figures 1 to 7 As shown, the threaded transmission mechanism provided in an embodiment of the present invention includes a first member and a second member 1, which are connected to each other via a threaded pair. When the threaded transmission mechanism in this embodiment is used in a connection device, one of the first and second members 1 can correspond to the inner cylinder described above and be connected to the core shaft, while the other can correspond to the outer cylinder described above and be provided with a locking ring 10 and a slider 11, without limitation.

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

[0040] The component body 2 is provided with a thread adapted to the second component 1 , and the component body 2 and the second component 1 are threadedly driven.

[0041] One of the end of the component body 2 and the movable part 3 can be reciprocatingly slidably mounted on the outside of the other. The movable part 3 has an abutment portion 4 at one end away from the component body 2, which can abut against the end of the second component 1.

[0042] The locking assembly is provided on the movable part 3 , and the locking assembly can switch between a locked state and an unlocked state.

[0043] When the locking assembly is switched to the locking state, the locking assembly can at least limit the movable part 3 from sliding in a direction away from the component body 2 to ensure that the movable part 3 is relatively fixed to the component body 2, so that a certain pre-tightening force can be generated between the first component and the second component 1, ensuring 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 making the movable part 3 slide relative to the component body 2, the abutment portion 4 is disengaged from the abutment with the second component 1. At this time, the pre-tightening force between the first component and the second fixture will disappear.

[0045] With such arrangement, when the threaded transmission mechanism is in a normal state, the locking assembly remains in a locked state. When the preload force between the first component and the second component 1 is too large due to excessive torque in the threaded transmission mechanism, the locking assembly can be switched to an unlocked state, so that the movable part 3 slides in a direction away from the component main body 2, so that the abutment part 4 is disengaged from the end of the second component 1, thereby releasing the preload force between the first component and the second component 1, so that the first component and the second component 1 can continue to rotate relative to each other, and the threaded transmission mechanism can continue to be used, thereby solving the problem of the threaded transmission mechanism getting stuck while avoiding structural damage.

[0046] In an embodiment of the present invention, a first locking groove 5 is provided on the circumferential side wall of the component main body 2 facing the movable part 3, and a second locking groove is provided on the circumferential side wall of the movable part 3 facing the component main body 2. When the movable part 3 and the component main body 2 are mounted together, the notch of the first locking groove 5 corresponds to the notch of the second locking groove, and the first locking groove 5 is connected to the second locking groove to form an annular space.

[0047] The locking assembly includes a locking ring 6 and a locking member 7. Locking ring 6 is an open ring. When subjected to a radially outward force, locking ring 6 expands and deforms outward. When subjected to a radially inward force, locking ring 6 contracts and deforms inward. When the radial force on locking ring 6 disappears, locking ring 6 returns to its original shape.

[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 enclosed 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 thread pair and allow the locking ring 6 to produce expansion deformation or contraction deformation.

[0049] One end of the locking ring 6 away from the abutting portion 4 at least partially abuts against the movable part 3, that is, no matter the locking ring 6 is in a natural state, an expanded state or a 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 member 1 abuts the abutment portion 4 of the first member, the second member 1 can generate a force on the movable member 3 along the axial direction of the threaded pair, causing the movable member 3 to slide away from the member body 2. At this time, the movable member 3 abuts against the end of the locking ring 6 away from the abutment portion 4, generating a force on the locking ring 6 away from the member body 2. In other words, the movable member 3 generates a force on the locking ring 6 toward the abutment portion 4. Consequently, the end of the locking ring 6 near the abutment portion 4 abuts against the frame body.

[0051] At this time, if there is no restriction 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 in the radial direction of the thread pair away from the component body 2, and at the same time, under the abutment of the movable part 3 on the locking ring 6, it slides in the direction close to the abutment portion 4. The sliding of the locking ring 6 in the direction close to the abutment portion 4 provides space for the movable part 3 to slide in the direction away from the component body 2.

[0052] The locking member 7 is disposed on the movable member 3 and 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 acting between the locking member 7 and the component body 2. In other words, 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 away from the component body 2 in the radial direction of the thread pair, and the sliding movement of the locking ring 6 in the direction close to the abutment portion 4 is also restricted.

[0053] In this arrangement, 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, the locking assembly is in a locked state. When the locking member 7 is rotated away from the side wall of the locking ring 6, the locking assembly is in an unlocked state.

[0054] When the threaded transmission mechanism is in a normal state, the locking ring 6 is in a natural state, with essentially no expansion or contraction deformation, and the end of the locking member 7 abuts against the side wall of the locking ring 6. When the threaded transmission mechanism experiences excessive torque, resulting in an excessive preload between the first and second members 1, the locking member 7 can be unscrewed away from the side wall of the locking ring 6, allowing the locking ring 6 to slide in a direction approaching the abutment portion 4 under the interaction with the movable member 3 and the member body 2, thereby allowing the movable member 3 to slide in a direction away from the member body 2, thereby reducing or even eliminating the abutment force between the movable member 3 and the end of the second member 1, and thereby releasing the preload between the first and second members 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 a different position, which is conducive to uniform force on the locking ring 6.

[0056] The thread pair includes an internal thread and an external thread. In this embodiment, the internal thread is provided on the component body 2, and the external thread is provided on the second component 1. In other words, the component body 2 is located outside the second component 1. The movable member 3 is sleeved on the outside of the component body 2. In this case, the locking member 7 can be screwed on the outside of the second component 1, which is convenient for operation.

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

[0058] For the convenience of explanation, the following description will be made by taking an example in which the internal thread is provided on the component main body 2 and the external thread is provided on the second component 1 .

[0059] In this embodiment, the surface of the end of the locking ring 6 that is distal to the abutment portion 4 is perpendicular to the axis of the threaded pair. Accordingly, a sidewall of the second locking groove that is distal to the abutment portion 4 is perpendicular to the axis of the threaded pair. When the movable member 3 abuts the locking ring 6, the movable member 3 and the locking ring 6 make surface contact, and the direction of the force acting between them is parallel to the axis of the threaded pair, which helps improve the stability of the movable member 3 as it slides relative to the component body 2.

[0060] In order to ensure the interaction between the locking ring 6 and the component body 2, the locking ring 6 can be deformed radially away from the component body 2 along the thread pair, and the locking ring 6 can slide in the direction close to the abutment 4 under the abutment action of the movable part 3 on the locking ring 6, by designing an end surface of the locking ring 6 close to the abutment 4 and / or a side wall of the first locking groove 5 close to the abutment 4.

[0061] In some embodiments, the end of the locking ring 6 near the abutment portion 4 has a first surface capable of abutting against the component body 2. The generatrix of the first surface is arranged at an angle to the axis of the thread pair, and the distance between the generatrix of the first surface and the axis of the thread pair gradually increases in a direction approaching the abutment portion 4.

[0062] In other embodiments, a side wall of the first locking groove 5 close to the abutment 4 is a second surface, a generatrix of the second surface is set at an angle to the axis of the thread pair, and the distance between the generatrix of the second surface and the axis of the thread pair gradually increases in the direction close to the abutment 4.

[0063] In some other embodiments, the generatrix of the first surface is parallel to the generatrix of the second surface, and the generatrix of the first surface and the generatrix of the second surface are both arranged at an angle to the axis of the thread pair, and the distance between the generatrix of the first surface and the axis of the thread pair gradually increases in the direction approaching the abutment portion 4, and the distance between the generatrix of the second surface and the axis of the thread pair gradually increases in the direction approaching the abutment portion 4. Figure 2 .

[0064] In this embodiment of the present invention, movable member 3 is provided with threaded holes, the number of which matches the number of locking members 7, and the axes of the threaded holes are arranged radially along the threaded pair. Locking member 7 includes a stud, the axis of which is arranged radially along the threaded pair. A torque groove is provided at the end of the stud remote from locking ring 6. The torque groove is adapted to accommodate a torque tool such as a torque wrench or screwdriver, allowing the torque tool to apply torque to the stud, thereby causing the stud to rotate relative to movable member 3.

[0065] In an embodiment of the present invention, when the locking assembly is in the unlocked state, when the locking ring 6 interacts with the component body 2 to produce maximum expansion deformation or minimum contraction deformation, the projection area of ​​the locking ring 6 along the axial direction of the thread pair is located outside the projection area of ​​the first locking groove 5.

[0066] That is to say, when the locking member 7 has no restrictive effect on the locking ring 6, and the second component 1 continues to have a large abutment effect on the movable member 3, the locking ring 6 can be completely disengaged from the first locking groove 5 under the action of the component main body 2 and the movable member 3. At this time, there is no longer any force between the locking ring 6 and the component main body 2 along the axial direction of the threaded pair, and the movable member 3 and the locking ring 6 can be completely disengaged from the component main body 2 along the axial direction of the threaded pair.

[0067] With such an arrangement, when the connecting device and the underwater operating equipment 8 are separated underwater, if due to some unexpected factors, the first component and the second component 1 cannot rotate relative to each other in the opposite direction, the first component and the second component 1 can continue to rotate relative to each other in the forward direction, thereby increasing the abutting force of the second component 1 on the abutting portion 4, and the abutting force of the movable part 3 on the locking ring 6 will also increase accordingly. The deformation of the locking ring 6 under the action of the movable part 3 and the component body 2 will also increase, and the force of the locking ring 6 on the locking member 7 will increase. When the force of the locking ring 6 on the locking member 7 increases to a certain extent, the threaded structure between the locking member 7 and the movable part 3 will be destroyed, so that the locking member 7 is separated from the component 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 is completely disengaged from the first locking groove 5, the component body 2 can be disengaged from the movable part 3.

[0068] The movable part 3 is provided with a locking ring 10 of a connecting device between the opposite end of one end of the abutment portion 4 and the component main body 2. The locking ring 10 can be sleeved onto the component main body 2 from the end of the component main body 2 close to the movable part 3. After the movable part 3 is connected to the component main body 2, the movable part 3 can limit the locking ring 10 from sliding along the axial direction of the thread pair. After the locking part 7 is destroyed and the locking ring 6 is completely disengaged from the first locking groove 5, the second component 1 and the component main body 2 can be moved in a direction away from the underwater working equipment 8 and the movable part 3. At this time, the movable part 3 is separated from the component main body 2, allowing the locking ring 10 and the component main body 2 to slide relative to each other along the axial direction of the thread pair, so that the second component 1 and the component main body 2 can be separated from the underwater working equipment 8, the movable part 3 and the locking ring 10, realizing the emergency release of the connecting device and the underwater working equipment 8.

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

[0070] Low-carbon alloy steel has greater strength, and the threaded structure between it and the movable part 3 is not easily damaged, which is beneficial to ensuring the reliability of the locking assembly.

[0071] The strength of copper is relatively low, and the threaded structure between it and the movable part 3 is relatively easy to be damaged, so it is suitable for situations where emergency release is required.

[0072] The material of the locking member 7 can be selected as needed and is not specifically limited.

[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 the structural strength 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.

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

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

[0076] When the underwater operating equipment 8 needs to be transported underwater, the connecting device needs to be connected to the underwater operating equipment 8 above water and disconnected from the underwater operating equipment 8 underwater. At this time, since the disconnection of the connecting device from the underwater operating equipment 8 is performed underwater, if the first component and the second component 1 cannot rotate relative to each other in opposite directions, it is impossible to manually tighten the locking member 7, and an emergency release method must be used. Therefore, a second locking member with relatively low structural strength is required in this case.

[0077] That is to say, when the underwater working equipment 8 needs to be lifted to the surface, a connecting device with a first locking part needs to be used to connect the underwater working equipment 8; when the underwater working equipment 8 needs to be sent underwater, a connecting device with a second locking part needs to be used to connect the underwater working equipment 8.

[0078] On the other hand, an embodiment of the present invention further provides a connection device comprising the threaded transmission mechanism provided in any of the above-described embodiments. When the preload force of the threaded transmission mechanism provided in any of the above-described embodiments is excessive, the threaded transmission mechanism can resolve the problem of the threaded transmission mechanism getting stuck while avoiding structural damage. Therefore, the connection device in this embodiment has the advantage of being able to smoothly disconnect from a connected component, such as underwater operating equipment 8. The derivation process for the beneficial effects of the connection device in the embodiment of the present invention is generally similar to the derivation process for 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, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A screw transmission mechanism, characterized in that: The invention comprises a first component and a second component (1), wherein the first component and the second component (1) are connected to each other through a threaded pair, and the first component comprises: A component body (2) provided with a thread adapted to the second component (1); A movable member (3), wherein one of the end of the component body (2) and the movable member (3) is reciprocatingly slidably sleeved on the outside of the other, and the end of the movable member (3) away from the component body (2) has an abutment portion (4), and the abutment portion (4) is suitable for abutting against the end of the second component (1); A locking assembly is provided on the movable part (3), and the locking assembly is capable of switching between a locked state and an unlocked state. In the locked state, the locking assembly is at least capable of restricting the movable part (3) from sliding in a direction away from the component body (2). In the unlocked state, the locking assembly is at least capable of allowing the movable part (3) to slide in a direction away from the component body (2).

2. The screw transmission mechanism according to claim 1, characterized in that: The circumferential side wall of the component body (2) facing the movable part (3) is provided with a first locking groove (5), and the circumferential side wall of the movable part (3) facing the component body (2) is provided with a second locking groove. The locking assembly comprises: A locking ring (6) adapted to generate expansion deformation or contraction deformation when subjected to a radial force, and to recover deformation when subjected to the radial force, the locking ring (6) being located in the first locking groove (5) and the second locking groove, the first locking groove (5) and the second locking groove being adapted to allow the locking ring (6) to slide along the axial direction of the thread pair, and to allow the locking ring (6) to generate expansion deformation or contraction deformation, the end of the locking ring (6) away from the abutment portion (4) at least partially abuts against the movable part (3), and when the end of the locking ring (6) close to the abutment portion (4) abuts against the component body (2), the locking ring (6) interacts with the component body (2) to cause the locking ring (6) to generate deformation away from the component body (2) along the radial direction of the thread pair; A locking member (7) is threadedly connected to the movable member (3), and an end portion of the locking member (7) is adapted to abut against a side wall of the locking ring (6).

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

4. The screw transmission mechanism according to claim 3, characterized in that: The surface of one end of the locking ring (6) away from the abutment portion (4) is perpendicular to the axis of the thread pair, and a side wall of the second locking groove away from the abutment portion (4) is perpendicular to the axis of the thread pair; The locking ring (6) has a first surface at one end close to the abutting portion (4) suitable for abutting against the component body (2), the generatrix of the first surface being arranged at an angle to the axis of the thread pair, and the distance between the generatrix of the first surface and the axis of the thread pair gradually increases in a direction close to the abutting portion (4); and / or, a side wall of the first locking groove (5) close to the abutting portion (4) is a second surface, the generatrix of the second surface being arranged at an angle to the axis of the thread pair, and the distance between the generatrix of the second surface and the axis of the thread pair gradually increases in a direction close to the abutting portion (4).

5. The screw transmission mechanism according to claim 2, characterized in that: The movable part (3) is provided with a threaded hole, the axial direction of the threaded hole is arranged along the radial direction of the thread pair, and the locking part (7) includes: A stud, wherein the axial direction of the stud is arranged along the radial direction of the thread pair, and a torque groove is provided at one end of the stud away from the locking ring (6).

6. The screw 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 component 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 thread pair.

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

8. The screw transmission mechanism according to claim 6, characterized in that: The locking member (7) comprises: A first locking member and a second locking member, wherein the structural strength of the first locking member is greater than the structural strength 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).

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

10. A connecting device, characterized in that: The invention comprises a screw transmission mechanism according to any one of claims 1 to 9.

Images