An integrated unlocking and avoiding locking release device and a working method thereof

Abstract

The application discloses a kind of unlocking and avoiding integrated locking release device, including receiving cover, spring gland, disengaging spring, locked piece, rotary support seat, locking rod, locking release assembly and outer shell body.The application also discloses the working method of the above-mentioned locking release device, locking state lower end of locking rod is locked, rotary support seat lower end is pressed in outer shell body upper end, locked piece lower end is pressed rotary support seat upper end;When unlocking, the lower end of the locking rod is released;When locked piece is not subjected to external force, rotary support seat rotates relative to outer shell body under the action of rotary spring and retraction spring and retracts, realize the separation of locked piece and rotary support seat and avoid;When locked piece is still pressed rotary support seat under the action of external force, rotary support seat rotates relative to outer shell body under the driving action of external force, locked piece and rotary support seat can also be separated and avoided.The application increases the unlocking and avoiding function under abnormal pressure condition, improves the reliability of system.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of spacecraft mechanisms, and relates to an unlocking and avoiding integrated locking release device and a working method thereof. BACKGROUND

[0002] A space optical servo turntable needs to lock a load and a turntable body during a launch active stage to resist vibration and impact during launching and transportation, and needs to be unlocked and released in orbit to restore the rotation function of the turntable body. Since the turntable is a rotary body (sometimes a continuous rotary body), the locking release mechanism needs to lock any direction freedom in space during locking; when unlocking, in addition to releasing the locking force, the locking release mechanism also needs to realize avoidance of the separation interface, leave enough safety distance, and ensure reliable rotation of the turntable, as shown in FIG. 1. Figure 1

[0003] The existing non-explosive type technical solutions either use two separate non-explosive unlockers to respectively realize unlocking and avoidance actions, or use a spring (or a torsional spring) to pull apart the separation interface after the locking force is released. If two unlockers are used, the volume and weight of the locking assembly are increased, and the product single-point failure source is doubled, which reduces the reliability of the product. If a spring is used, only one-way locking can be realized, the locking stiffness is greatly reduced, and reliable locking cannot be realized.

[0004] The existing non-explosive type locking release device with the unlocking and avoiding functions has a fatal defect, that is, the gap between the avoiding mechanism and the locked part needs to be strictly controlled during locking, and the locked part is elastically deformed by the locking force to realize locking. After unlocking, the elastic deformation must be restored. If the elastic deformation cannot be restored due to mechanical vibration or structural plastic deformation, the avoiding mechanism of the locking release device cannot realize rotation and retraction, and thus the separation interface cannot be effectively avoided. SUMMARY

[0005] The application aims to overcome the above defects, and provides an unlocking and avoiding integrated locking release device and a working method thereof, which solves the problem that the separation interface cannot be effectively avoided in the case that the elastic deformation cannot be restored after the locking force is released and the locking release device and the locked part are abnormally pressed. The application increases the unlocking and avoiding functions in the case of abnormal pressing, and improves the reliability of the system.

[0006] To achieve the above application purposes, the application provides the following technical solutions.

[0007] ​The application discloses an unlocking and avoiding integrated locking release device, which comprises a receiving cover, a spring cover, a disengaging spring, a locked part, a rotating support base, a locking rod, a locking release assembly and an outer shell body. The application also discloses a working method of the locking release device, wherein in the locked state, the lower end of the locking rod is locked, the lower end of the rotating support base is pressed against the upper end of the outer shell body, and the lower end of the locked part is pressed against the upper end of the rotating support base; when being unlocked, the lower end of the locking rod is released, and the locking rod enters the inside of the receiving cover; when the locked part is not subjected to external force, the rotating support base rotates relative to the outer shell body under the joint action of the rotating spring and the retracting spring, and is retracted into the inside of the outer shell body, so that the locked part and the rotating support base are separated and avoided; when the locked part is still pressed against the rotating support base under the action of external force, the rotating support base rotates relative to the outer shell body under the driving action of the external force, and the locked part and the rotating support base can also be separated and avoided.

[0008] The specific scheme of the application is as follows:

[0009] The unlocking and avoiding integrated locking release device comprises a receiving cover, a spring cover, a disengaging spring, a locked part, a rotating support base, a rotating spring, a locking rod, a locking release assembly and an outer shell body.

[0010] The locked part is fixedly installed at the lower end of the receiving cover.

[0011] The lower end of the locked part is in a ball head structure, and the upper end of the rotating support base is in a conical surface structure; in the locked state, the lower end of the locked part is pressed against the upper end of the rotating support base; in the unlocked state, the rotating support base is retracted downward, and the lower end of the locked part is separated from the upper end of the rotating support base to realize avoidance.

[0012] The inner wall of the outer shell body is provided with a first key groove, the outer wall of the rotating support base is provided with a first spline, the lower end of the rotating support base is a spiral spherical surface, and the upper end of the outer shell body is a spiral conical surface; in the locked state, the first key groove and the first spline are in a misaligned state, the lower end of the rotating support base is pressed against the upper end of the outer shell body, and the rotating spring is located between the outer wall of the lower end of the rotating support base and the inner wall of the upper end of the outer shell body, and is in a compressed state; in the unlocked state, the locked part is not pressed against the upper end of the rotating support base under normal circumstances, and the rotating spring provides a rotating driving force for the rotating support base; under abnormal circumstances, the locked part is still pressed against the upper end of the rotating support base under the action of abnormal external force, the abnormal external force is converted into a rotating driving force for the rotating support base at the contact position between the lower end of the rotating support base and the upper end of the outer shell body, the rotating support base rotates relative to the outer shell body under the action of the rotating driving force, the first key groove is aligned with the first spline, and the rotating support base is retracted downward into the inside of the outer shell body,

[0013] The outer shell body is a hollow shell body with an open upper end, and the locking release assembly is arranged in the inside of the outer shell body; the locking release assembly is used for locking or releasing the lower end of the locking rod.

[0014] The upper end of the locking rod is provided with a spring cover, the spring cover is located above the locked part, and a disengaging spring is arranged between the spring cover and the locked part; the locking release assembly is in a locked state when locking the lower end of the locking rod, and the spring cover sequentially presses down the disengaging spring, the locked part, the rotary support and the outer shell; the locking release assembly is in an unlocked state when releasing the lower end of the locking rod, and the disengaging spring drives the locking rod to enter the inside of the storage cover upward.

[0015] Further, the rotary spring is fixedly installed on the upper end of the outer shell.

[0016] Further, the lower end of the rotary support is provided with an L-shaped structure extending downward into the inside of the outer shell and bending towards the inner wall of the outer shell.

[0017] The upper end surface and the lower end surface of the retraction spring are respectively in contact with the inner wall of the outer shell and the L-shaped structure, in the locked state, the retraction spring is in a compressed state, and in the unlocked state, the retraction spring pulls down the rotary support, so that the rotary support is retracted downward into the inside of the outer shell.

[0018] Further, the device further comprises a compression bushing.

[0019] The compression bushing is sleeved on the outside of the locking rod; the upper end of the compression bushing is fixedly connected with the spring cover.

[0020] The compression bushing is a positive T-shaped structure, in the locked state, the lower surface of the head of the positive T-shaped structure is pressed against the upper surface of the locked part, the lower surface of the head of the positive T-shaped structure and the upper surface of the locked part are sprayed with a high-friction coating, and the friction coefficient of the high-friction coating is 0.6-0.8.

[0021] The tail of the positive T-shaped structure sequentially passes through the center of the locked part and the rotary support, the outer wall of the compression bushing is provided with a second spline, the center of the rotary support is provided with a second key groove, and the rotation of the rotary support is limited through the cooperation of the second spline and the second key groove.

[0022] Further, the device further comprises a locking nut.

[0023] The locking nut is installed on the upper end of the locking rod, and is used for applying a compression force to the spring cover.

[0024] Further, a spherical gasket is arranged between the compression bushing and the locking rod, so as to automatically adapt to different shafts.

[0025] Further, the contact curve between the lower end of the rotary support and the upper end of the outer shell is a spiral line with a radius of d2 and a helix angle of

[0026] The contact curve between the upper end of the rotary support and the lower end of the locked part is a circle with a radius of d1.

[0027] The helix angle Determined according to the following formula:

[0028]

[0029] Wherein, A=d2, C=d1·μ1·cosβ; μ1 is the friction coefficient of the upper end of the rotating support seat and the lower end of the locked part; μ2 is the friction coefficient of the lower end of the rotating support seat and the upper end of the outer shell; α is the equivalent thread angle of the helix; β is the taper angle of the upper end taper of the rotating support seat.

[0030] Further, the contact curve between the lower end of the rotating support seat and the upper end of the outer shell is a helix, the radius is d2, and the helix angle is

[0031] The contact curve between the upper end of the rotating support seat and the lower end of the locked part is a circle, and the radius is d1;

[0032] The friction coefficient μ3 of the high-friction coating satisfies the following formula:

[0033]

[0034] Wherein, A=d2, C=d1·μ1·cosβ, D=d3·μ3·cosβ; μ1 is the friction coefficient of the upper end of the rotating support seat and the lower end of the locked part; μ2 is the friction coefficient of the lower end of the rotating support seat and the upper end of the outer shell; α is the equivalent thread angle of the helix; β is the taper angle of the upper end taper of the rotating support seat; The lower surface of the head of the T-shaped compression bushing is a circular surface, and d3 is the average of the inner diameter and the outer diameter of the circular surface.

[0035] Further, the upper end and the lower end of the rotating support seat are coated with a solid lubricating film of molybdenum disulfide.

[0036] The working method of the above-mentioned unlocking and avoiding integrated locking release device, characterized in that, comprising:

[0037] Locking state:

[0038] The locking release assembly locks the lower end of the locking rod, and the spring retainer successively presses the disengagement spring, the locked part, the rotating support seat and the outer shell; The first key groove of the outer shell and the first spline of the rotating support seat are in a misaligned state, the lower end of the rotating support seat is pressed against the upper end of the outer shell; The lower end of the locked part is pressed against the upper end of the rotating support seat;

[0039] Unlocking state:

[0040] The locking release assembly releases the lower end of the locking rod;

[0041] The spring cover drives the locking rod to enter the inside of the storage cover under the action of the spring.

[0042] Under normal circumstances, the locked part is no longer subjected to external force, the rotating support seat rotates relative to the outer shell under the action of the rotating spring, after the first key groove is aligned with the first spline, the rotating support seat is retracted downward into the inside of the outer shell, realizing the separation and avoidance of the locked part and the rotating support seat.

[0043] Under abnormal circumstances, the locked part is still pressed against the rotating support seat under the action of abnormal external force, the abnormal external force is converted into a rotating driving force for the rotating support seat at the contact between the lower end of the rotating support seat and the upper end of the outer shell, the rotating support seat rotates relative to the outer shell under the action of the rotating driving force, after the first key groove is aligned with the first spline, the rotating support seat is retracted downward into the inside of the outer shell, realizing the separation and avoidance of the locked part and the rotating support seat.

[0044] Compared with the prior art, the present application has at least one of the following beneficial effects:

[0045] (1) The present application creatively proposes an unlocking and avoidance integrated locking release device, which increases the unlocking and avoidance function under abnormal pressure condition through the design of the contact surface structure of each component, improves the reliability of the system, and has significant progress.

[0046] (2) The present application is the first locking release device based on non-explosive principle, which can realize the unlocking-avoidance function at the same time through one trigger, and has strong market competitiveness.

[0047] (3) The technical scheme proposed by the present application can be applied to many space electromechanical products, and good economic benefits can be expected.

[0048] (4) The present application reliably realizes the mutual switching of the locked state and the unlocked state by means of key groove cooperation and friction, and further provides general rules for the design of the contact surface, which can meet the requirements of reliable opening under abnormal pressure and reliable locking at the same time, and has important guiding significance for the design and use of the integrated locking release device. BRIEF DESCRIPTION OF DRAWINGS

[0049] Figure 1 It is a schematic diagram of the existing locking release device.

[0050] Figure 2 It is a schematic diagram of the locking release device of the present application.

[0051] Figure 3 It is a size schematic diagram of the locking release device of the present application.

[0052] Figure 4 It is a spiral line schematic diagram of the contact between the outer shell and the rotating support seat of the present application.

[0053] Figure 5 Schematic diagram of helix on the rotating support seat in contact with the outer shell body of the present application;

[0054] Figure 6 Schematic diagram of contact line on the rotating support seat in contact with the locked part of the present application;

[0055] Figure 7 Schematic diagram of contact line on the locked part in contact with the rotating support seat of the present application;

[0056] Figure 8 Schematic diagram of the first key groove on the outer shell body of the present application;

[0057] Figure 9 Schematic diagram of the stop key on the compression bushing of the present application;

[0058] Figure 10 Force diagram of the rotating support seat of the present application, wherein (a) is the actual force diagram, and (b) is a schematic diagram of a simplified inclined angle friction model;

[0059] In the figure, 1 is a receiving cover, 2 is a locking nut, 3 is a spring cover, 4 is a spherical gasket, 5 is a release spring, 6 is a compression bushing, 7 is a locked part, 8 is a rotating support seat, 9 is a rotating spring, 10 is a retraction spring, 11 is a locking rod, 12 is a locking release assembly, 13 is an outer shell body; 131 is a first key groove, and 61 is a second key. DETAILED DESCRIPTION

[0060] The characteristics and advantages of the present application will become more apparent with the following detailed description of the present application.

[0061] The term "exemplary" is used herein to mean "serving as an example, instance, or illustration." Any implementation described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other implementations. Although various aspects of implementations can be illustrated with reference to the drawings, the drawings are not necessarily drawn to scale unless specifically noted.

[0062] The present application aims at the problem that the separation surface cannot effectively avoid if the elastic deformation cannot recover after the locking force is released in the existing locking release device. The present application proposes a non-explosive locking release device which integrates the functions of locking, unlocking and avoiding. The device can greatly expand the application range of the traditional non-explosive unlocking device and solve the reliable unlocking and avoiding of the separation surface of the locking release device under abnormal pressure.

[0063] The principle of the locking release device proposed by the present application is shown in Figure 2 .

[0064] The lower part of the locking release device can be any split nut type locking release assembly 12, which is released by energizing the lower end of the locking rod 11. The upper part is a set of avoidance mechanisms with rotation and retraction functions.

[0065] When locked, the locking rod 11 is inserted into the locking release assembly 12, the locking nut 2 exerts a locking force, under the action of the locking force, the spring retainer 3 is compressed, the spring 5 is released, the compression bushing 6 and the locked part 7 are compressed, and the locked part 7 and the lower rotary support 8 are compressed. The lower end of the locked part 7 is a ball head structure, and the upper end of the lower rotary support 8 is a conical surface. Through the ball-cone cooperation, the locked part 7 and the lower rotary support 8 are fully constrained in all degrees of freedom.

[0066] When unlocked, the bottom locking release assembly 12 acts, the locking force is released, the spring 5 (in a compressed state when locked) pushes the compression bushing 6, the locking rod 11, the locking nut 2 and the spring retainer 3 together to pop up along the inside of the storage cover 1. Subsequently, the rotary support 8 rotates and retracts under the action of the side wall and the bottom spring, realizing the avoidance of the separation surface.

[0067] The lower end of the rotary support 8 is a spiral spherical surface, and the upper end of the outer shell 13 is a spiral conical surface. The locked part 7 and the rotary support 8 will leave a gap of 0.1-0.3mm before locking, which is eliminated by the elastic deformation of the locked part 7 under the action of the locking force, realizing the fitting of the ball-cone surface. After the release of the locking force, the elastic deformation of the locked part 7 will recover normally, thereby popping up 0.1-0.3mm. If subjected to abnormal pressure, even if the locking force between the locked part 7 and the rotary support 8 has been released, it will still be in a compressed state. At this time, if there is no lower spiral conical surface cooperation, the rotary support 8 will not rotate and retract, because of the existence of the spiral conical surface, the rotary support 8 will rotate and retract under the action of abnormal positive pressure. That is to say, if the locked part 7 is abnormally pressed during unlocking, by reasonably designing the helix angle of the spiral surface, the rotary support 8 can be reliably rotated and retracted, realizing the avoidance of the separation surface. And when locked, due to the existence of the spline on the outer wall of the compression bushing 6, the reliable locking of the device can be ensured. Thus, the design of a mechanism that can realize unlocking and avoidance at the same time is completed.

[0068] When the helix angle of the spiral line matched by the lower end of the rotary support 8 and the upper end of the outer shell 13 satisfies the following formula, it can be ensured that if there is still an abnormal pressure on the locked part after the release of the locking force, it can still be reliably opened.

[0069]

[0070] When the high-friction coating coefficient of the matching part of the compression bushing 6 and the locked part 7 satisfies the following formula, it can be ensured that it can be reliably locked.

[0071]

[0072] In the formula, A = d2, C = d1 μ1 cos β, D = d3 μ3 cos β;

[0073] As Figure 3 d1 is the distance from the contact point of the upper conical surface of the rotary support 8 with the lower spherical surface of the locked member 7 to the central axis of the locking and releasing device, i.e. Figure 6 and Figure 7 the contact curve of the upper end of the rotary support 8 with the lower end of the locked member 7 is a circle, and the radius of the circle is d1;

[0074] d2 is the distance from the contact point of the lower helical conical surface of the rotary support 8 with the upper spherical surface of the outer housing 13 to the central axis of the locking and releasing device, i.e. Figure 4 and Figure 5 the contact curve of the lower end of the rotary support 8 with the upper end of the outer housing 13 is a helix, and the radius of the helix is d2;

[0075] d3 is the average distance from the average center line of the contact surface of the lower flat surface of the head of the compression bushing 6 with the upper flat surface of the locked member 7 to the central axis of the locking and releasing device, i.e. the contact between the lower surface of the head of the compression bushing 6 and the upper surface of the locked member 7 is an annular surface, and d3 is the average value of the inner diameter and the outer diameter of the annular surface;

[0076] μ1 is the friction coefficient at the contact position of the upper conical surface of the rotary support 8 with the lower spherical surface of the locked member 7;

[0077] μ2 is the friction coefficient at the contact position of the lower helical conical surface of the rotary support 8 with the upper spherical surface of the outer housing 13;

[0078] μ3 is the friction coefficient at the contact position of the lower flat surface of the compression bushing 6 with the upper flat surface of the locked member 7;

[0079] α is the equivalent thread angle of the helix at the contact position of the lower helical conical surface of the rotary support 8 with the upper spherical surface of the outer housing 13; in general, it is a pre-given value;

[0080] β is the taper angle of the upper conical surface of the rotary support 8; the taper angle is generally selected as 45°, which is a commonly used angle in the field of space locking.

[0081] Example 1:

[0082] The lower part of the locking and releasing device of the present invention is an unlocking trigger assembly, which can be implemented by means of shape memory alloy split nuts or hot knife split nuts, etc. The unlocking trigger assembly used in this embodiment is a general-purpose assembly. The upper part is a set of rotating retraction mechanisms, which mainly include a storage cover 1, a locking nut 2, a spring cover 3, a spherical washer 4, a release spring 5, a pressing bushing 6, a locked part 7, a rotating support 8, a rotating spring 9, a locking rod 11, a retraction spring 10, a locking and releasing assembly 12, and a housing 13.

[0083] During locking, the locking rod 11 is screwed into the lower locking release assembly 12. Under the action of locking force, the spring cover 3, the release spring 5, the clamping bushing 6, and the locked part 7 are pressed together. The lower end of the locked part 7 is a ball head structure, which mates with the conical surface at the upper end of the rotating support 8 (ball-cone fit) to achieve radial force bearing (shear resistance). The lower end of the rotating support 8 is a helical spherical surface. Similarly, under the action of locking force, the rotating support 8 presses against the helical conical surface at the upper end of the outer shell 13 to achieve a helical ball-cone fit. In practical applications, the locked part 7 and the outer shell 13 are connected to the turntable and the satellite compartment plate, respectively. The rotating support 8 has a spline groove (second keyway) structure at its center, which mates with the stop spline on the clamping bushing 6 (e.g., Figure 9 The second spline 61 in the middle is engaged, and the clamping bushing 6 is pressed against the upper end face of the locked part 7 by the locking force. At the same time, a high friction coating (tungsten carbide coating) is sprayed at the mating point between the clamping bushing 6 and the upper end face of the locked part 7 to ensure that it can overcome the rotational torque caused by the positive pressure on the helical ball-cone mating surface at the lower end of the rotary support 8 (the elastic force of the rotary spring 9 is negligible relative to this rotational torque). Through this structure and coating design, it can be ensured that the rotary support 8 can not rotate and maintain the supporting state under the action of the locking force.

[0084] When unlocking, the locking release component 12 is activated, the locking force is released, and the positive pressure pressing on the clamping bushing 6 disappears. At this time, two possible situations may occur: First, if the elastic deformation of the locked part 7 is restored, the ball head will naturally bounce up and disengage from the rotating support 8. The release spring 5 will first pop the clamping bushing 6 and the locking rod 11 upward, releasing the constraint of the rotating support 8. The rotating support 8 will rotate under the combined action of the rotating spring 9 and the return spring 10, and retract into the storage groove of the outer shell 13, completing the unlocking and avoidance action. Secondly, when an abnormal external force exists, if the elastic deformation of the locked part 7 fails to recover after the locking force is released, the ball head on the locked part 7 will still press against the rotating support seat 8. At this time, due to the frictional resistance at the ball-cone joint between the lower end of the locked part 7 and the upper end of the rotating support seat 8, the rotating spring 9 alone cannot overcome this frictional resistance to pull the rotating support seat 8 to rotate. Therefore, this invention designs a spiral ball-cone joint between the rotating support seat 8 and the outer shell 13 to provide rotational power for the rotating support seat 8. Since the lower part of the rotating support seat 8 is a spiral ball-cone joint, and the outer wall of the rotating support seat 8 is provided with a first spline, the rotating support seat 8 will rotate under the driving force of the clamping force and retract into the storage groove on the outer shell 13 (e.g., Figure 8 Within the first keyway 131, the pressing bushing 6 and the locking rod 11 are simultaneously ejected by the release spring 5, completing the unlocking and avoidance action; the abnormal external force here refers to the abnormal normal pressure generated by the plastic deformation or displacement of the structure during the mechanical or launching process of the turntable. Before each locking, there will be a recovery action of the elastic force of the rotating spring 9. The specific operation is to twist the rotating support 8 at an angle and temporarily fix it with a pin. After the locking force is applied, the pin is pulled out.

[0085] Example 2:

[0086] In this embodiment, the calculation formulas for the helix angle and friction coefficient proposed above are illustrated with examples:

[0087] (1) Calculation of helix angle

[0088] Analysis of the geometric relationships shows that the contact curve between the upper conical surface of the rotary support and the spherical surface of the locked part is a circle with a diameter of d1, while the contact curve between the lower helical spherical surface of the rotary support and the helical conical surface of the outer shell is a cylindrical helix with a diameter of d2. The relevant parameters are shown in Table 1.

[0089] Table 1. Relevant parameters of the matching spiral.

[0090] Parameter name Value Thread form angle a / ° 90 coefficient of friction μ2 0.05 upper end contact circle diameter d1 / mm 34 lower end helix diameter d2 / mm 44

[0091] A force analysis of the rotating support is performed, showing that it is subjected to normal force and friction from the spherical surface of the locked part's ball head and the spiral conical surface of the outer shell. It should be noted that, as... Figure 10At the lower end of the helical spherical surface of the support seat, the friction force has components in the vertical and vertical directions.

[0092] Referring to the force analysis method of the thread, the equivalent friction angle of the helical conical surface and the helical spherical surface is:

[0093]

[0094] The model shown can be used to analyze the self-locking performance of the helical surface, and the force balance equation in the vertical direction is written: Figure 10

[0095]

[0096] where F N2 is the normal pressure of the contact surface between the rotating support seat 8 and the outer shell 13, F a is the locking force on the locking rod.

[0097] According to the relationship between the normal pressure and the friction force on the contact surface:

[0098] F f2 = F N2 tan p e

[0099] where F f2 is the friction force of the contact surface between the rotating support seat 8 and the outer shell 13.

[0100] The resultant force of the normal pressure and the friction force in the horizontal direction is the driving force at the helical surface of the rotating support seat under the action of the axial force. According to the above two formulas, it is solved that:

[0101]

[0102] When the rotating support seat can just rotate, the driving force F Q also needs to overcome the friction force between the ball head of the locked part and the upper conical surface of the rotating support seat. Therefore, the critical condition for the rotation of the rotating support seat is listed:

[0103] d2F Q ≥ d1μ1F a cos β, and in this embodiment, μ1 = 0.05.

[0104] That is, after the locking force is released, if there is still an abnormal pressure on the locked part, it can still be reliably opened, and the condition needs to be met:

[0105]

[0106] Solving the above formula can obtain the critical helical angle Considering the retraction reliability, the helical angle is taken as 15° in actual design, and the driving torque margin is 3.36.​

[0107] (2) Stop torque calculation

[0108] According to the above design, the helix angle is selected Considering the pre-tightening force F a = 20 KN, then its driving force is:

[0109] F Q = 9201 N

[0110] The corresponding contact circle and helix line diameter d1 = 34 mm, d2 = 44 mm, then after deducting the friction torque of the upper conical surface of the rotary support seat and the ball head of the rotary table, the net driving torque is:

[0111] T Q = d2F Q -d1F a tan p e = 284.6 Nm

[0112] The compression force of the compression bushing and the upper end surface of the locked ball head is 20 KN, the mean diameter d3 of the contact ring is 25.5 mm, and the friction coefficient of the tungsten carbide high friction coating is temporarily taken as 0.5, then the corresponding resistance torque is:

[0113] T Z = F a μ3d3 = 637.5 Nm

[0114] From the above calculation, it can be seen that the resistance torque is much larger than the driving torque, and the stop resistance torque margin is 2.24, which can ensure that the rotary support seat does not rotate in the locked state and can be reliably locked.

[0115] The present application has been described in detail in combination with specific embodiments and exemplary examples, but these descriptions cannot be understood as limiting the present application. Those skilled in the art understand that the technical solutions and embodiments of the present application can be variously replaced, modified or improved without deviating from the spirit and scope of the present application, and these all fall within the scope of the present application. The protection scope of the present application is subject to the appended claims.

[0116] The contents not described in detail in the specification of the present application are the known technology of those skilled in the art.

Claims

1. An integrated unlock and yield locking release device, comprising: The utility model relates to a locking release device, including receiving cover (1), spring gland (3), break away spring (5), locked piece (7), rotary support seat (8), rotary spring (9), locking rod (11), locking release assembly (12) and outer shell (13); The locked piece (7) is fixedly installed at the lower end of the receiving cover (1); The lower end of the locked piece (7) is a ball head structure, and the upper end of the rotary support seat (8) is a conical surface structure; in the locked state, the lower end of the locked piece (7) presses the upper end of the rotary support seat (8) tightly; in the unlocked state, the rotary support seat (8) is retracted downward, and the lower end of the locked piece (7) is separated from the upper end of the rotary support seat (8) to achieve avoidance; The inner wall of the outer shell (13) is provided with a first key groove, the outer wall of the rotary support seat (8) is provided with a first spline, the lower end of the rotary support seat (8) is a spiral spherical surface, and the upper end of the outer shell (13) is a spiral conical surface; in the locked state, the first key groove and the first spline are in a misaligned state, the lower end of the rotary support seat (8) is pressed tightly against the upper end of the outer shell (13), and the rotary spring (9) is located between the outer wall of the lower end of the rotary support seat (8) and the inner wall of the upper end of the outer shell (13) in a compressed state; in the unlocked state, the locked piece (7) is not pressed against the upper end of the rotary support seat (8) under normal circumstances, the rotary spring (9) provides rotary driving force for the rotary support seat (8); in the abnormal situation, the locked piece (7) is still pressed against the upper end of the rotary support seat (8) under abnormal external force, the abnormal external force is converted into rotary driving force for the rotary support seat (8) at the contact position between the lower end of the rotary support seat (8) and the upper end of the outer shell (13), the rotary support seat (8) rotates relative to the outer shell (13) under the action of the rotary driving force, and after the first key groove and the first spline are aligned, the rotary support seat (8) is retracted downward into the outer shell (13); The outer shell (13) is a hollow shell with an open upper end, and the locking release assembly (12) is arranged inside the outer shell (13); the locking release assembly (12) is used for locking or releasing the lower end of the locking rod (11); The upper end of the locking rod (11) is provided with the spring gland (3), the spring gland (3) is located above the locked piece (7), and the break away spring (5) is arranged between the spring gland (3) and the locked piece (7); the locking release assembly (12) is in the locked state when locking the lower end of the locking rod (11), and the spring gland (3) presses the break away spring (5), the locked piece (7), the rotary support seat (8) and the outer shell (13) in sequence; the locking release assembly (12) is in the unlocked state when releasing the lower end of the locking rod (11), and the break away spring (5) drives the locking rod (11) to enter the inside of the receiving cover (1) upward; The contact curve between the lower end of the rotary support seat (8) and the upper end of the outer shell (13) is a spiral line; The utility model further includes a pressing bushing (6); The pressing bushing (6) is sleeved on the outside of the locking rod (11); the upper end of the pressing bushing (6) is fixedly connected with the spring gland (3); The tail of the positive T-shaped structure passes through the centers of the locked piece (7) and the rotary support seat (8) in sequence, the outer wall of the pressing bushing (6) is provided with a second spline, the center of the rotary support seat (8) is provided with a second key groove, and the rotary support seat (8) is rotationally limited through the cooperation of the second spline and the second key groove; The utility model relates to a locking release device, including receiving cover (1), spring gland (3), break away spring (5), locked piece (7), rotary support seat (8), rotary spring (9), locking rod (11), locking release assembly (12) and outer shell (13); The contact curve between the lower end of the rotating support seat (8) and the upper end of the outer shell (13) is a spiral line with a radius d2 and a spiral angle The contact curve between the upper end of the rotating support seat (8) and the lower end of the locked part (7) is a circle with a radius of d1; Spiral angle Determined according to the following formula: wherein A = d2, C = d1 μ1 cos β; μ1 is the friction coefficient of the upper end of the rotating support seat (8) and the lower end of the locked part (7); μ2 is the friction coefficient of the lower end of the rotating support seat (8) and the upper end of the outer shell (13); α is the equivalent thread angle of the helix; β is the taper angle of the upper end taper of the rotating support seat (8). The contact curve between the lower end of the rotating support seat (8) and the upper end of the outer shell (13) is a spiral curve with a radius d2 and a spiral angle The contact curve between the upper end of the rotating support seat (8) and the lower end of the locked part (7) is a circle with a radius of d1; The friction coefficient μ3 of the high friction coating satisfies the following formula: wherein A = d2, C = d1 μ1 cos β, D = d3 μ3 cos β; μ1 is the friction coefficient of the upper end of the rotating support seat (8) and the lower end of the locked part (7) at the matching position; μ2 is the friction coefficient of the lower end of the rotating support seat (8) and the upper end of the outer shell (13) at the matching position; α is the equivalent thread angle of the helix; β is the taper angle of the upper end taper surface of the rotating support seat (8); the head lower surface of the T-shaped compression bushing (6) and the upper surface of the locked part (7) at the matching position are circular annular surfaces, and d3 is the average value of the inner diameter and the outer diameter of the circular annular surface.

2. The integrated unlock and yield lock release device of claim 1, wherein, The rotating spring (9) is fixedly installed on the upper end of the outer shell (13).

3. The integrated unlock and yield lock release device of claim 1, wherein, The lower end of the rotating support seat (8) is provided with an L-shaped structure extending downward into the inner part of the outer shell (13) and bending to the inner wall of the outer shell (13); The upper end surface and the lower end surface of the retraction spring (10) are respectively in contact with the inner wall of the outer shell (13) and the L-shaped structure, and in the locked state, the retraction spring (10) is in a compressed state, and in the unlocked state, the retraction spring (10) pulls down the rotating support seat (8), so that the rotating support seat (8) is retracted downward into the inner part of the outer shell (13), realizing the separation and avoidance of the locked part (7) and the rotating support seat (8).

4. The integrated unlock and yield lock release device of claim 1, wherein, The compression bushing (6) is a positive T-shaped structure, and in the locked state, the lower surface of the head of the positive T-shaped structure is compressed to the upper surface of the locked part (7), and the lower surface of the head of the positive T-shaped structure is sprayed with a high friction coating at the matching position with the upper surface of the locked part (7), and the friction coefficient of the high friction coating is 0.6-0.

8.

5. The integrated unlock and yield lock release device of claim 1, wherein, It also includes a locking nut (2); The locking nut (2) is installed on the upper end of the locking rod (11) and is used to apply a compression force to the spring gland (3).

6. The integrated unlock and yield lock release device of claim 4, wherein, A spherical gasket (4) is arranged between the compression bushing (6) and the locking rod (11) to automatically adapt to different shafts.

7. The integrated unlock and yield lock release device of claim 1, wherein, The upper end and the lower end of the rotating support seat (8) are coated with a molybdenum disulfide solid lubricating film.

8. The method of claim 1-7, wherein, It includes: Locked state: The locking release assembly (12) locks the lower end of the locking rod (11), and the spring gland (3) successively presses down the spring (5), the locked part (7), the rotating support seat (8) and the outer shell (13); the first key groove of the outer shell (13) and the first spline of the rotating support seat (8) are in a misaligned state, and the lower end of the rotating support seat (8) is compressed to the upper end of the outer shell (13); the lower end of the locked part (7) is compressed to the upper end of the rotating support seat (8); Unlocked state: The locking release assembly (12) releases the lower end of the locking rod (11); The spring gland (3) drives the locking rod (11) to enter the inner part of the storage cover (1) under the action of the spring (5) being separated; Under normal circumstances, the locked part (7) is no longer subjected to external force, the rotating support seat (8) rotates relative to the outer shell (13) under the action of the rotating spring (9), after the first key groove and the first spline are aligned, the rotating support seat (8) is retracted downward into the inner part of the outer shell (13), realizing the separation and avoidance of the locked part (7) and the rotating support seat (8); Under abnormal circumstances, the locked part (7) still compresses the rotating support seat (8) under the action of abnormal external force, the abnormal external force is converted into a rotating driving force for the rotating support seat (8) at the contact position between the lower end of the rotating support seat (8) and the upper end of the outer shell (13), the rotating support seat (8) rotates relative to the outer shell (13) under the action of the rotating driving force, after the first key groove and the first spline are aligned, the rotating support seat (8) is retracted downward into the inner part of the outer shell (13), realizing the separation and avoidance of the locked part (7) and the rotating support seat (8).

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