Locking and unlocking sleeve and locking and unlocking device

Abstract

The present application relates to the field of locking and unlocking tools, and specifically provides a locking and unlocking sleeve and a locking and unlocking device, aiming to solve at least one of the problems of limited adaptation range, too much noise and serious wear of the primary tooth of the locking and unlocking sleeve in the prior art. To this end, the locking and unlocking sleeve of the present application comprises: the sleeve is axially slidably arranged on the transition body; the first elastic member is arranged between the sleeve and the transition body, and is arranged to enable the sleeve to move between the first position and the second position; the transition body is axially slidably arranged on the sleeve base; the second elastic member is arranged between the transition body and the sleeve base, and is arranged to enable the sleeve to move between the second position and the third position after the sleeve reaches the second position under the action of the first elastic member. Through two-stage compression, the range of the locking and unlocking sleeve force is expanded, so that it can adapt to various locking mechanisms.

Description

Technical Field

[0001] This invention relates to the field of unlocking tools, specifically providing an unlocking sleeve and an unlocking device. Background Technology

[0002] The existing locking and unlocking sleeves have a limited range of spring force, which cannot be adapted to various locking mechanisms. Furthermore, the outer spring of the sleeve is continuously compressed, and the idle phase after unlocking is usually accompanied by obvious vehicle vibration and unlocking noise, which can easily cause user tension and complaints. When locking and unlocking the threaded locking mechanism, the first tooth of the locking mechanism is subjected to high pressure, which will accelerate the wear of the first tooth of the thread and increase the failure rate of locking and unlocking.

[0003] Accordingly, a new technical solution is needed in this field to solve the above problems. Summary of the Invention

[0004] This invention aims to solve the aforementioned technical problems, namely, to address at least one of the following issues in existing unlocking sleeves: limited adaptability, excessive noise, and severe wear of the first tooth. To this end, this invention provides an unlocking sleeve, comprising: a sleeve having a fastening mechanism at its top along the axial direction for engaging with a fastener to be unlocked; a transition body on which the sleeve is slidably disposed along the axial direction; a first elastic member disposed between the sleeve and the transition body, the first elastic member being configured to allow the sleeve to move between a first position and a second position; a sleeve base on which the transition body is slidably disposed along the axial direction; and a second elastic member disposed between the transition body and the sleeve base, the second elastic member being configured to allow the sleeve to move between a second position and a third position after the sleeve reaches the second position under the action of the first elastic member.

[0005] In the specific embodiment of the above-described unlocking sleeve, both the first elastic element and the second elastic element are springs.

[0006] In the specific embodiment of the above-described unlocking sleeve, the elastic coefficient of the first elastic element is less than that of the second elastic element.

[0007] In the specific embodiment of the above-mentioned unlocking sleeve, the transition body has an isolation boss; a first elastic element is disposed between the sleeve and the isolation boss; and a second elastic element is disposed between the isolation boss and the sleeve base.

[0008] In the above-described specific embodiment with an unlocking sleeve, the bottom of the sleeve has a first mating hole; the top of the transition body has a first mating post, which is slidably disposed in the first mating hole along the axis; and / or the bottom of the transition body has a second mating hole; the top of the sleeve base has a second mating post, which is slidably disposed in the second mating hole along the axis.

[0009] In the specific embodiment of the above-described locking and unlocking sleeve, the bottom of the sleeve also has a first pin hole; the first mating post has a first elongated hole extending axially; the locking and unlocking sleeve also includes a first pin shaft, the first pin hole and the first elongated hole are connected by the first pin shaft, and the first pin shaft can move axially in the first elongated hole; and / or the bottom of the transition body also has a second pin hole; the second mating post has a second elongated hole extending axially; the locking and unlocking sleeve also includes a second pin shaft, the second pin hole and the second elongated hole are connected by the second pin shaft, and the second pin shaft can move axially in the second elongated hole.

[0010] In the specific embodiment of the above-mentioned locking and unlocking sleeve, the axial direction of the first pin is at a certain angle to the axial direction of the second pin.

[0011] In the specific embodiment of the above-mentioned unlocking sleeve, the sleeve has a mounting groove, and a retaining ring is provided in the mounting groove to prevent the first pin from coming out of the first pin hole.

[0012] In the above-described specific embodiment with an unlocking sleeve, the transition body also has a first limiting surface, which is used to abut against the sleeve to prevent the sleeve from sliding further downward; and / or the transition body also has a second limiting surface, which is used to abut against the sleeve base to prevent the transition body from sliding further downward.

[0013] In the specific embodiment of the above-mentioned unlocking sleeve, the unlocking sleeve further includes: a transmission assembly, the top of which is connected to the sleeve base, and the bottom of which is used to connect to the output end of the power system.

[0014] In the specific embodiment of the above-described unlocking sleeve, the sleeve base has an axial cavity; the transmission assembly includes a sleeve transition shaft, which has a first axial protrusion that is accommodated in the axial cavity.

[0015] In the specific embodiment of the above-described unlocking sleeve, the sleeve base also has a first radial cavity, and the axial cavity communicates with the first radial cavity; the transmission assembly further includes: a second radial cavity, which is disposed on the first protrusion and communicates with the first radial cavity; a third elastic member, which is disposed in the second radial cavity and extends and retracts radially along the sleeve transition axis; and a locking member, which is slidably disposed in the second radial cavity, located on the side of the third elastic member facing the second radial cavity, and the locking member portion is located in the first radial cavity.

[0016] An unlocking device includes a power system and an unlocking sleeve as described above.

[0017] Solution 1. A locking / unlocking sleeve, characterized in that it comprises: a sleeve having a fastening mechanism at its top along the axial direction for engaging with a fastener to be locked / unlocked; a transition body on which the sleeve is slidably disposed along the axial direction; a first elastic member disposed between the sleeve and the transition body, the first elastic member being configured to allow the sleeve to move between a first position and a second position; a sleeve base on which the transition body is slidably disposed along the axial direction; and a second elastic member disposed between the transition body and the sleeve base, the second elastic member being configured to allow the sleeve to move between a second position and a third position after the sleeve reaches the second position under the action of the first elastic member.

[0018] Solution 2. The unlocking sleeve according to Solution 1, characterized in that the first elastic element and the second elastic element are both springs.

[0019] Solution 3. The unlocking sleeve according to Solution 2, characterized in that the elastic coefficient of the first elastic element is less than the elastic coefficient of the second elastic element.

[0020] Solution 4. The unlocking sleeve according to Solution 1, characterized in that the transition body has an isolation boss; the first elastic member is disposed between the sleeve and the isolation boss; and the second elastic member is disposed between the isolation boss and the sleeve base.

[0021] Solution 5. The unlocking sleeve according to Solution 1, characterized in that: the bottom of the sleeve has a first mating hole; the top of the transition body has a first mating post, the first mating post being slidably disposed in the first mating hole along the axis; and / or the bottom of the transition body has a second mating hole; the top of the sleeve base has a second mating post, the second mating post being slidably disposed in the second mating hole along the axis.

[0022] Solution 6. The unlocking sleeve according to Solution 5, characterized in that the bottom of the sleeve further has a first pin hole; the first mating post has a first elongated hole extending axially; the unlocking sleeve further includes a first pin shaft, the first pin hole and the first elongated hole are connected by the first pin shaft, the first pin shaft is capable of moving axially in the first elongated hole; and / or the bottom of the transition body further has a second pin hole; the second mating post has a second elongated hole extending axially; the unlocking sleeve further includes a second pin shaft, the second pin hole and the second elongated hole are connected by the second pin shaft, the second pin shaft is capable of moving axially in the second elongated hole.

[0023] Solution 7. The unlocking sleeve according to Solution 6, characterized in that the axial direction of the first pin is at a certain angle to the axial direction of the second pin.

[0024] Solution 8. The unlocking sleeve according to Solution 6, characterized in that the sleeve has a mounting groove, and a retaining ring is provided in the mounting groove, the retaining ring being used to prevent the first pin from coming out of the first pin hole.

[0025] Solution 9. The unlocking sleeve according to Solution 1, characterized in that the transition body further has a first limiting surface, the first limiting surface being used to abut against the sleeve so that the sleeve no longer slides downward; and / or the transition body further has a second limiting surface, the second limiting surface being used to abut against the sleeve base so that the transition body no longer slides downward.

[0026] Solution 10. The unlocking sleeve according to Solution 1, characterized in that the unlocking sleeve further includes: a transmission assembly, the top of which is connected to the sleeve base, and the bottom of which is used to connect to the output end of the power system.

[0027] Solution 11. The unlocking sleeve according to Solution 10, characterized in that the sleeve base has an axial cavity; the transmission assembly includes a sleeve transition shaft, the sleeve transition shaft has a first axial protrusion, the first protrusion being accommodated in the axial cavity.

[0028] Solution 12. The unlocking sleeve according to Solution 11, characterized in that the sleeve base further has a first radial cavity, and the axial cavity communicates with the first radial cavity; the transmission assembly further includes: a second radial cavity, which is disposed on the first protrusion, and the second radial cavity communicates with the first radial cavity; a third elastic member, which is disposed in the second radial cavity and extends and retracts radially along the sleeve transition axis; and a locking member, which is slidably disposed in the second radial cavity, the locking member being located on the side of the third elastic member facing the second radial cavity, and the locking member being partially located in the first radial cavity.

[0029] Scheme 13. An unlocking device, characterized in that the unlocking device includes a power system and an unlocking sleeve as described in any one of Schemes 1-12.

[0030] In adopting the above technical solution, the present invention employs a two-stage compression stroke with graded compression. The transition body separates the first elastic element and the second elastic element, reducing the mutual influence between the two elastic elements. The first stage of compression stroke is located between the sleeve and the transition body, and the compression deformation element is the first elastic element. The second stage of compression stroke is located between the transition body and the sleeve base, and the compression deformation element is the second elastic element. Through the two-stage compression stroke, the range of elastic force variation of the unlocking sleeve is expanded. The first stage of compression stroke can provide a smaller lifting force, while the second stage of compression stroke can provide a larger lifting force, enabling the unlocking sleeve to adapt to various locking mechanisms and reducing the wear of the first tooth and noise. Attached Figure Description

[0031] The preferred embodiments of the present invention are described below with reference to the accompanying drawings, in which:

[0032] Figure 1 This is a schematic diagram of the unlocking sleeve in this invention;

[0033] Figure 2 This is a schematic diagram of the structure when the sleeve base and the transmission assembly are disassembled in this invention, at which time the sleeve is located in the first position;

[0034] Figure 3 This is a schematic diagram of the structure of the sleeve in the second position in this invention;

[0035] Figure 4 This is a schematic diagram of the structure when the sleeve of the present invention is in the third position;

[0036] Figure 5 This is a structural schematic diagram of the sleeve and transition body in this invention from a certain perspective;

[0037] Figure 6 This is a schematic diagram of the transmission component in this invention;

[0038] Figure 7 This is a schematic diagram of the structure after the single bolt-type locking mechanism has been locked;

[0039] Figure 8 This is a schematic diagram of the structure after the single bolt-type locking mechanism has been unlocked;

[0040] Figure 9 This is a schematic diagram of the locking mechanism of the quick-change battery pack with built-in anti-loosening mechanism after locking.

[0041] Figure 10 This is a schematic diagram of the structure of the quick-change battery pack locking mechanism after it has been unlocked, which has a built-in anti-loosening mechanism.

[0042] In the diagram: 1. Sleeve; 101. First mating hole; 102. First pin hole; 103. Mounting groove; 104. Retaining ring; 105. Plum blossom-shaped hole; 2. Transition body; 201. Isolation boss; 202. First mating post; 203. Second mating hole; 204. First elongated hole; 205. Second pin hole; 206. First limiting surface; 207. Second limiting surface; 3. First elastic element; 4. Sleeve base; 401. Second mating post; 402. Second elongated hole; 40 3. Axial cavity; 404. First radial cavity; 5. Second elastic element; 6. Transmission assembly; 601. Sleeve transition shaft; 602. First protrusion; 603. Second radial cavity; 604. Third elastic element; 605. Clamp; 7. First pin; 8. Second pin; 9. Operating lever; 11. Bolt; 12. Nut; 13. Bolt mounting seat; 14. Anti-loosening bolt; 15. Floating nut; 16. Anti-loosening spring; 17. Anti-loosening internal gear ring; 18. Anti-loosening external gear ring. Detailed Implementation

[0043] Preferred embodiments of the present invention will now be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of the present invention and are not intended to limit the scope of protection of the present invention. Those skilled in the art can make adjustments as needed to adapt to specific application scenarios.

[0044] It should be noted that in the description of this invention, terms such as "upper," "lower," "left," "right," "inner," and "outer," which indicate direction or positional relationships, are based on the direction or positional relationships shown in the accompanying drawings. These are used merely for ease of description and do not indicate or imply that the relevant devices or elements must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention. Furthermore, ordinal numbers such as "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0045] Furthermore, it should be noted that, in the description of this invention, unless otherwise explicitly specified and limited, the terms "installation" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0046] like Figure 1-5As shown, the present invention proposes an unlocking sleeve, comprising: a sleeve 1, having a fastening mechanism at its top along the axial direction, the fastening mechanism being a quincunx-shaped hole 105, or other polygonal holes, for engaging with the fastener to be unlocked; a transition body 2, on which the sleeve 1 is slidably disposed along the axial direction; a first elastic member 3, disposed between the sleeve 1 and the transition body 2, the first elastic member 3 being configured to allow the sleeve 1 to move between a first position and a second position; a sleeve base 4, on which the transition body 2 is slidably disposed along the axial direction; and a second elastic member 5, disposed between the transition body 2 and the sleeve base 4, the second elastic member 5 being configured to allow the sleeve 1 to move between a second position and a third position after the sleeve 1 reaches the second position under the action of the first elastic member 3.

[0047] In this embodiment, a pre-compression force is applied to the first elastic element 3 during installation. At this time, the compression amount of the first elastic element 3 is X11, and the resulting elastic force is F11. The distance between the sleeve 1 and the transition body 2 is at its maximum, and the sleeve 1 is in the first position. After the pressure on the sleeve 1 exceeds F11, the first elastic element 3 is gradually compressed, and the sleeve 1 gradually slides towards the transition body 2. When the pressure on the sleeve 1 equals F12, the distance between the sleeve 1 and the transition body 2 is at its minimum, and the sleeve 1 is in the second position. The elastic force generated by the first elastic element 3 is F12, and the compression amount is X12. The range of elastic force variation for the first elastic element 3 is (F11, F12).

[0048] During installation, a pre-compression force is applied to the second elastic element 5. At this point, the compression of the second elastic element 5 is X21, and the resulting elastic force is F21. The distance between the transition body 2 and the sleeve base 4 is at its maximum at this time. After the sleeve 1 reaches the second position, the pressure on the sleeve 1 is increased. When the pressure exceeds F21, the second elastic element 5 is gradually compressed, and the transition body 2 gradually slides towards the sleeve base 4. When the pressure on the sleeve 1 equals F22, the distance between the transition body 2 and the sleeve base 4 is at its minimum. At this time, the sleeve 1 is in the third position, and the elastic force generated by the second elastic element 5 is F22, with a compression amount of X22. The range of elastic force variation for the second elastic element 5 is (F21, F22).

[0049] In order to achieve the effect of staged compression, that is, the sleeve 1 first compresses the first elastic element 3 to the second position, and then compresses the second elastic element 5 to the third position, F12 can be made less than F21.

[0050] When unlocking a single bolt-type locking mechanism, the lifting force provided by the unlocking sleeve does not need to be too large. Figure 7-8The diagram illustrates the structure of the locking and unlocking sleeve of this invention when locking and unlocking a single bolt-type locking mechanism. The single bolt-type locking mechanism includes a nut 12 and a bolt 11. One end of the bolt 11 engages with a star-shaped hole 105. The sleeve 1 drives the bolt 11 to rotate for locking and unlocking. During the locking and unlocking process, the bolt 11 compresses a spring, and the spring force acts on the bolt 11 through the sleeve 1. After the bolt 11 is unlocked, the spring force causes the first thread of the bolt 11 to press against the nut 12.

[0051] like Figure 7-8 As shown, in order to reduce the wear and noise of the first tooth when unlocking the single bolt type locking mechanism, the F12 of the first elastic element 3 is set to be less than F21 in this embodiment. In this way, when unlocking the single bolt type locking mechanism, only the first elastic element 3 can be compressed to obtain a smaller lifting force. Thus, when the bolt 11 is retracted to the unlocked position, the lifting force exerted on the bolt 11 by the first elastic element 3 through the sleeve 1 is smaller, which can reduce the wear of the first tooth of the bolt 11 and nut 12, and also reduce the impact force when the thread jumps, and reduce noise.

[0052] A significant lifting force is required when unlocking the quick-change battery pack locking mechanism with its built-in anti-loosening mechanism. Figure 9-10 The diagram shows the structure of the locking mechanism of the quick-change battery pack with built-in anti-loosening mechanism when the locking sleeve of the present invention is used to lock and unlock. The quick-change battery pack locking mechanism with built-in anti-loosening mechanism includes a bolt mounting seat 13 set on the crossbeam, an anti-loosening bolt 14 set in the bolt mounting seat 13, and an anti-loosening spring 16 set between the anti-loosening bolt 14 and the bolt mounting seat 13. The lower part of the anti-loosening bolt 14 is inserted into the anti-loosening inner toothed ring 17, and the anti-loosening outer toothed ring 18 is sleeved on the outside of the anti-loosening inner toothed ring 17. The anti-loosening outer toothed ring 18 is fixedly set on the bolt mounting seat 13 on the crossbeam. The anti-loosening inner toothed ring 17 and the anti-loosening outer toothed ring 18 are engaged by teeth to prevent the anti-loosening bolt 14 from rotating after being vibrated. When tightening or loosening, the bottom of the anti-loosening internal gear ring 17 engages with the plum blossom-shaped hole 105, and the lower part of the anti-loosening bolt 14 is accommodated in the plum blossom-shaped hole 105. The sleeve 1 needs to apply a large lifting force to the anti-loosening internal gear ring 17 so that the anti-loosening internal gear ring 17 can overcome the elastic force of the anti-loosening spring 16 and be pushed upward to the position where it is disengaged from the anti-loosening external gear ring 18. Only then can the sleeve 1 drive the anti-loosening internal gear ring 17 to rotate, thereby tightening or loosening the anti-loosening bolt 14.

[0053] like Figure 9-10As shown, when locking or unlocking the quick-change battery pack locking mechanism with its own anti-loosening mechanism, the second elastic element 5 needs to be compressed to obtain a larger lifting force. However, the lifting force does not act directly on the threads of the anti-loosening bolt 14 and the floating nut 15, but on the anti-loosening internal gear ring 17. When unlocking, the lifting force is only transmitted to the battery pack housing and not to the vehicle body through the anti-loosening bolt 14 and the floating nut 15, which can avoid causing vehicle body vibration and noise.

[0054] Existing unlocking sleeves have limited spring force coverage, making them unsuitable for different types of locking mechanisms. For single bolt-type locking structures, the required lifting force is small, necessitating a smaller spring force from the unlocking sleeve. Otherwise, a greater lifting force exerted by the spring on the bolt will lead to more severe wear on the bolt and nut's first thread during free rotation. In extreme cases, damage to the first thread can cause locking failures on subsequent attempts, and the impact force during thread jumps will also be greater, resulting in increased noise. For locking mechanisms with built-in anti-loosening mechanisms, a larger lifting force is required, necessitating a larger spring force from the unlocking sleeve; otherwise, it will be difficult to unlock the anti-loosening mechanism. Some unlocking sleeves apply their lifting force to the vehicle body after unlocking, causing vibration and noise.

[0055] The lifting force requirements of a single bolt locking mechanism and a quick-change battery pack locking mechanism with a built-in anti-loosening mechanism are contradictory. The single bolt locking mechanism requires an unlocking sleeve that can provide a smaller lifting force, while the quick-change battery pack locking mechanism with a built-in anti-loosening mechanism requires an unlocking sleeve that can provide a larger lifting force.

[0056] In this embodiment, a two-stage compression stroke is adopted. The transition body 2 separates the first elastic element 3 and the second elastic element 5, thereby reducing the mutual influence between the two elastic elements. The first stage of compression stroke is located between the sleeve 1 and the transition body 2, and the compression deformation element is the first elastic element 3. The second stage of compression stroke is located between the transition body 2 and the sleeve base 4, and the compression deformation element is the second elastic element 5. Through the two-stage compression stroke, the range of elastic force variation of the unlocking sleeve is expanded. The first stage of compression stroke can provide a smaller lifting force, while the second stage of compression stroke can provide a larger lifting force, enabling the unlocking sleeve to adapt to various locking mechanisms and reducing the wear of the first tooth and noise.

[0057] It should be noted that the compression amount X12 of the first elastic element 3 can be equal to or less than the maximum compression deformation of the first elastic element 3. To avoid over-compression of the first elastic element leading to fatigue, X12 is generally set to be less than the maximum compression deformation of the first elastic element 3. Similarly, the compression amount X22 of the second elastic element 5 is generally set to be less than the maximum compression deformation of the second elastic element 5. The maximum compression deformation of a spring refers to the maximum amount of compression deformation that the spring can withstand when compressed by an external force, also known as the spring deformation limit. If the external force is too large, causing the spring deformation to exceed the maximum compression deformation, it is very likely to cause the spring to deform, fatigue, or even fail.

[0058] Furthermore, both the first elastic element 3 and the second elastic element 5 are springs. In order to obtain the sleeve spring force with a special variation curve, the physical implementation of the first elastic element 3 and the second elastic element 5 is not limited to the cylindrical compression spring shown in the figure, but can also be a conical spring, a disc spring, etc.

[0059] Furthermore, in order to provide a smaller lifting force when unlocking the single bolt-type locking mechanism, the elastic coefficient of the first elastic element 3 can be made smaller than that of the second elastic element 5, so that the second elastic element 5 provides a larger lifting force.

[0060] Furthermore, such as Figure 1-5 As shown, the transition body 2 is provided with an isolation boss 201; the first elastic element 3 is disposed between the sleeve 1 and the isolation boss 201; the second elastic element 5 is disposed between the isolation boss 201 and the sleeve base 4. The isolation boss 201 separates the first elastic element 3 and the second elastic element 5, so that the deformation processes of the first elastic element 3 and the second elastic element 5 are completely decoupled, avoiding mutual influence between the two. If the first elastic element 3 and the second elastic element 5 are not separated by the isolation boss 201 on the transition body 2, the two elastic elements form a series system. During the compression process of the first elastic element 3, the second elastic element 5 will also participate, and their characteristic parameters cannot be decoupled. When the first elastic element 3 coils together, the second elastic element 5 is compressed alone. The coiling operation of the first elastic element 3 results in higher stress on its spring wire, making it more prone to fatigue.

[0061] Furthermore, such as Figure 2-4 As shown, in order to allow the sleeve 1 to slide axially on the transition body 2, the bottom of the sleeve 1 has a first mating hole 101; the top of the transition body 2 has a first mating post 202, which is slidably disposed in the first mating hole 101 along the axis. When pressure is applied to the sleeve 1, the sleeve 1 slides downward along the first mating post 202; when the pressure is removed, the sleeve 1 slides upward back to its original position under the action of the first elastic element 3.

[0062] In order to allow the transition body 2 to be slidably mounted on the sleeve base 4 along the axial direction, the bottom of the transition body 2 has a second docking hole 203; the top of the sleeve base 4 has a second docking post 401, which is slidably mounted in the second docking hole 203 along the axial direction.

[0063] Alternatively, a docking post can be provided at the bottom of the sleeve 1 and a docking hole can be provided at the top of the transition body 2, or a docking post can be provided at the bottom of the transition body 2 and a docking hole can be provided at the top of the sleeve base 4. This does not deviate from the principle of the present invention, and therefore all fall within the protection scope of the present invention.

[0064] In order to transmit torque between the sleeve base 4 and the transition body 2, and between the transition body 2 and the sleeve 1, the cross-section of the first docking post 202 is a polygon, and the cross-section of the first docking hole 101 is also a corresponding polygon; similarly, the cross-section of the second docking post 401 is a polygon, and the cross-section of the second docking hole 203 is also a corresponding polygon.

[0065] Furthermore, such as Figure 1-5 As shown, the bottom of the sleeve 1 also has a first pin hole 102; the first mating post 202 has a first elongated hole 204 extending axially; the unlocking sleeve also includes a first pin 7, the first pin hole 102 and the first elongated hole 204 are connected by the first pin 7, and the first pin 7 can move axially in the first elongated hole 204. When the sleeve 1 slides on the transition body 2, the first pin 7 slides in the first elongated hole 204. The sliding distance of the first pin 7 in the elongated hole 204 is the sliding distance of the sleeve 1 on the transition body 2. The sleeve 1 and the transition body 2 are connected by the first pin 7 to prevent the sleeve 1 from separating from the transition body 2, and the axial movement of the first pin 7 in the first elongated hole 204 does not affect the relative sliding between the sleeve 1 and the transition body 2.

[0066] The bottom of the transition body 2 also has a second pin hole 205; the second mating post 401 has a second elongated hole 402 extending axially; the unlocking sleeve also includes a second pin 8, the second pin hole 205 and the second elongated hole 402 are connected by the second pin 8, and the second pin 8 can move axially in the second elongated hole 402. When the transition body 2 slides on the sleeve base 4, the second pin 8 slides in the second elongated hole 402. The distance the second pin 8 slides in the second elongated hole 402 is the distance the transition body 2 slides on the sleeve base 4. The transition body 2 and the sleeve base 4 are connected by the second pin 8 to prevent the transition body 2 from separating from the sleeve base 4, and the sliding of the second pin 8 in the second elongated hole 402 does not affect the relative sliding between the transition body 2 and the sleeve base 4.

[0067] The sleeve has a third pin hole. The unlocking sleeve also includes a third pin shaft, a support rod disposed in the plum blossom-shaped hole 105, and a third spring. The support rod has a third elongated hole. The third pin hole and the third elongated hole are connected by a third pin shaft, which can move axially in the third elongated hole. The third spring is axially disposed between the support rod and the sleeve 1. When the plum blossom-shaped hole 105 is engaged with the anti-loosening bolt 14, the support rod may be pushed downward by the anti-loosening bolt 14. At this time, the third spring is compressed. Under the action of the third spring, the support rod applies an upward force to the anti-loosening bolt 14. The elastic force of the third spring is small and is used to support the anti-loosening bolt 14, making it easier to separate the unlocking sleeve from the anti-loosening bolt 14.

[0068] Furthermore, because the compression stroke of the unlocking sleeve is divided into two stages in this embodiment, its free height increases, and the top swing angle of the unlocking sleeve increases during rotation. This may negatively affect the unlocking cap and torque transmission. To solve this problem, the axial direction of the first pin 7 is made at a certain angle to the axial direction of the second pin 8. Figure 2-5 The axis of the first pin 7 is at 90° to the axis of the second pin 8, which distributes the swing angle caused by the fit clearance between the sleeve 1 and the transition body 2, and between the transition body 2 and the sleeve base 4, to two vertical directions on the circumference, effectively reducing the top swing angle increased by the increase in height due to the unlocking sleeve.

[0069] The first elongated hole 204 on the transition body is at a certain angle to the axis of the second pin hole 205. Figure 2-5 The first and second pins 8 are arranged at a 90° angle to meet the axial offset requirements after assembly.

[0070] Furthermore, such as Figure 5 As shown, the sleeve 1 has a mounting groove 103, and a retaining ring 104 is provided in the mounting groove 103. The retaining ring 104 axially limits the first pin 7 to prevent the first pin 7 from coming out of the first pin hole 102. The retaining ring 104 can be an elastic rubber ring. When it is necessary to replace the first elastic element 3, the retaining ring 104 can be removed and the first pin 7 can be pushed out axially to achieve the purpose of quickly replacing the first elastic element 3. Similarly, the second pin 8 can be axially limited in the same way to achieve the purpose of quickly replacing the second elastic element 5.

[0071] Without departing from the basic principles of the present invention, those skilled in the art can use other axial limiting methods, such as fixing the two ends of the first pin 7 by welding or other methods for axial limiting.

[0072] Furthermore, the transition body 2 also has a first limiting surface 206, which is used to abut against the sleeve 1, preventing the sleeve 1 from sliding further downward. The transition body 2 also has a second limiting surface 207, which is used to abut against the sleeve base 4, preventing the transition body 2 from sliding further downward.

[0073] In this embodiment, the first limiting surface 206 and the second limiting surface 207 respectively limit the extreme positions of the compression stroke of the sleeve 1 and the transition body 2. If the compression stroke of the sleeve 1 and the transition body 2 is not limited by the structure, the first elastic element 3 and the second elastic element 5 may be over-compressed, especially since the first elastic element 3 is always in a compressed state during the compression of the second elastic element 5.

[0074] To prevent the first elastic element 3 from being over-compressed and causing force attenuation, when the sleeve 1 abuts against the first limiting surface 206, the compression amount of the first elastic element 3 is X12, which is less than the maximum compression deformation of the first elastic element 3. When the second limiting surface 207 abuts against the sleeve base 4, the compression amount of the second elastic element 5 is X22, which is less than the maximum compression deformation of the second elastic element 5.

[0075] Furthermore, the unlocking sleeve also includes a transmission assembly 6. The top of the transmission assembly 6 is connected to the sleeve base 4, and the bottom of the transmission assembly 6 is used to connect to the output end of the power system. The power of the power system is transmitted to the sleeve base 4 through the transmission assembly 6, and then sequentially transmitted to the transition body 2 and the sleeve 1 through the sleeve base 4. The sleeve 1 transmits the power to the fastener to be unlocked or unlocked through its fastening mechanism, thereby driving the fastener to unlock or unlock.

[0076] Furthermore, such as Figure 1-6 As shown, the sleeve base 4 has an axial cavity 403; the transmission assembly 6 includes a sleeve transition shaft 601, which has a first axial protrusion 602, which is accommodated in the axial cavity 403. The sleeve base 4 and the transmission assembly 6 are connected and transmit torque through the first protrusion 602 and the axial cavity 403.

[0077] In order to transmit torque to the sleeve base 4, the cross-section of the first protrusion 602 is polygonal, and the cross-section of the axial cavity 403 is also a corresponding polygonal.

[0078] Furthermore, such as Figure 2 and Figure 6As shown, to facilitate the installation and disassembly of the transmission assembly 6 and the sleeve base 4, the sleeve base 4 also has a first radial cavity 404, and the axial cavity 403 communicates with the first radial cavity 404; the transmission assembly 6 also includes: a second radial cavity 603, which is disposed on the first protrusion 602, and the second radial cavity 603 communicates with the first radial cavity 404; a third elastic member 604, which is disposed in the second radial cavity 603 and extends and retracts radially along the sleeve transition shaft 601; and a locking member 605, which is slidably disposed in the second radial cavity 603, and the locking member 605 is located on the side of the third elastic member 604 facing the second radial cavity 603, and part of the locking member 605 is located in the first radial cavity 404.

[0079] During installation, the locking piece 605 is pushed back into the second radial cavity 603 by the inner wall of the axial cavity 403. When the transmission assembly 6 reaches the assembly position, the second radial cavity 603 communicates with the first radial cavity 404. Under the action of the third elastic member 604, the locking piece 605 is partially pushed into the first radial cavity 404, thus preventing the sleeve base 4 from falling off the transmission assembly 6. When it is necessary to remove the sleeve base 4 from the transmission assembly 6, align the first radial cavity 404 with an easy-to-operate position, then insert the operating rod 9 into the first radial cavity 404 to disengage the locking piece 605 from the first radial cavity 404, and then pull the sleeve base 4 upwards to remove it.

[0080] An unlocking / unlocking device includes a power system and an unlocking / unlocking sleeve as described above. The power system provides power for the rotation of the unlocking / unlocking sleeve.

[0081] Those skilled in the art will understand that although some embodiments described herein include certain features included in other embodiments but not others, combinations of features from different embodiments are intended to be within the scope of this application and form different embodiments. For example, any of the claimed embodiments in the claims of this application can be used in any combination.

[0082] The technical solution of the present invention has been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after such changes or substitutions will all fall within the scope of protection of the present invention.

Claims

1. An unlocking sleeve, characterized in that, include: The sleeve (1) has a fastening mechanism at its top along the axial direction for engaging with the fastener to be unlocked; Transition body (2), the sleeve (1) is slidably disposed on the transition body (2) along the axial direction; A first elastic element (3) is disposed between the sleeve (1) and the transition body (2), and the first elastic element (3) is configured to enable the sleeve (1) to move between a first position and a second position; Sleeve base (4), the transition body (2) is slidably disposed on the sleeve base (4) along the axial direction; The second elastic element (5) is disposed between the transition body (2) and the sleeve base (4). The second elastic element (5) is configured such that when the sleeve (1) reaches the second position under the action of the first elastic element (3), the second elastic element (5) can move the sleeve (1) between the second position and the third position. The transition body (2) also has a first limiting surface (206), which is used to abut against the sleeve (1) so that the sleeve (1) no longer slides downward; and / or The transition body (2) also has a second limiting surface (207), which is used to abut against the sleeve base (4) so ​​that the transition body (2) no longer slides downward.

2. The unlocking / unlocking sleeve according to claim 1, characterized in that, Both the first elastic element (3) and the second elastic element (5) are springs.

3. The unlocking sleeve according to claim 2, characterized in that, The elastic coefficient of the first elastic element (3) is less than that of the second elastic element (5).

4. The unlocking / unlocking sleeve according to claim 1, characterized in that, The transition body (2) has an isolation boss (201). The first elastic element (3) is disposed between the sleeve (1) and the isolation boss (201); the second elastic element (5) is disposed between the isolation boss (201) and the sleeve base (4).

5. The unlocking sleeve according to claim 1, characterized in that, The bottom of the sleeve (1) has a first mating hole (101). The top of the transition body (2) has a first docking post (202), which is slidably disposed in the first docking hole (101) along the axis; and / or The bottom of the transition body (2) has a second docking hole (203); the top of the sleeve base (4) has a second docking post (401), which is slidably disposed in the second docking hole (203) along the axis.

6. The unlocking sleeve according to claim 5, characterized in that, The bottom of the sleeve (1) also has a first pin hole (102); The first docking post (202) has a first elongated hole (204) extending along the axial direction. The unlocking sleeve also includes a first pin (7), the first pin hole (102) and the first elongated hole (204) are connected by the first pin (7), and the first pin (7) is axially movable in the first elongated hole (204); and / or The bottom of the transition body (2) also has a second pin hole (205). The second docking post (401) has a second elongated hole (402) extending axially. The unlocking sleeve also includes a second pin (8), the second pin hole (205) and the second elongated hole (402) are connected by the second pin (8), and the second pin (8) can move axially in the second elongated hole (402).

7. The unlocking / unlocking sleeve according to claim 6, characterized in that, The axial direction of the first pin (7) is at a certain angle to the axial direction of the second pin (8).

8. The unlocking sleeve according to claim 6, characterized in that, The sleeve (1) has a mounting groove (103), and a retaining ring (104) is provided in the mounting groove (103). The retaining ring (104) is used to prevent the first pin (7) from coming out of the first pin hole (102).

9. The unlocking sleeve according to claim 1, characterized in that, The unlocking / unlocking sleeve also includes: The transmission assembly (6) is connected at its top to the sleeve base (4) and at its bottom to the output end of the power system.

10. The unlocking sleeve according to claim 9, characterized in that, The sleeve base (4) has an axial cavity (403). The transmission assembly (6) includes a sleeve transition shaft (601) having a first axial protrusion (602) on the sleeve transition shaft (601) and the first protrusion (602) being accommodated in the axial cavity (403).

11. The unlocking sleeve according to claim 10, characterized in that, The sleeve base (4) also has a first radial cavity (404), and the axial cavity (403) communicates with the first radial cavity (404); The transmission assembly (6) also includes: A second radial cavity (603) is disposed on the first protrusion (602), and the second radial cavity (603) communicates with the first radial cavity (404); The third elastic element (604) is disposed in the second radial cavity (603) and the third elastic element (604) extends and retracts radially along the sleeve transition shaft (601); The card (605) is slidably disposed in the second radial cavity (603), the card (605) is located on the side of the third elastic member (604) facing the second radial cavity (603), and the card (605) is partially located in the first radial cavity (404).

12. An encryption / unlocking device, characterized in that, The locking / unlocking device includes a power system and a locking / unlocking sleeve as described in any one of claims 1-11.

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