CN115384816A - Oscillating compresses tightly release - Google Patents

Abstract

The invention discloses a swing type compaction release device, which comprises a swing arm component, a flexible capture component, a compaction seat, a release device and a rotating shaft component, wherein the swing arm component is connected with the flexible capture component; the swing arm assembly is fixedly connected with a load through clamping, meanwhile, the swing arm assembly is rotatably connected with the pressing seat through the rotating shaft assembly, and the pressing seat is fixedly connected with an external star body; the center of the pressing seat is provided with a release device used for releasing the swing arm component; the two sides of the pressing seat are provided with flexible capturing assemblies, and after the swing arm assembly is released, the swing arm assembly is captured through flexible deformation of the flexible capturing assemblies. The invention realizes better load adaptability than the traditional locking joint by symmetrically clamping the load, and reduces unlocking impact; the swing arm component is actively swung open in a large gap, so that the separation action independent of the load motion is realized, and the separation reliability is improved; through the flexible subassembly of catching, realized that movable part's lightweight can be repeatedly accomodate, promoted economic benefits.

Description

A swing type compression release device

technical field

The invention relates to the technical field of compression release devices for space mechanisms, in particular to a swing type compression release device.

Background technique

The compression release device, especially the compression release device involved in the spacecraft, in the satellite launch section, by reliably connecting the mechanism, load and other loads with the satellite body, constrains all degrees of freedom to resist the mechanical load of the rocket launch section; when the satellite After entering the orbit, the connection between the mechanism, load and other loads and the satellite body is reliably cut off to release the mechanism and load, so that it has the corresponding degree of freedom of movement to achieve normal movement.

The compression release device in the technical field of space structure connection mechanism is usually composed of two parts, which are respectively fixed to the load or the satellite body, and through the form of perforation on the load, the compression rod, rope, etc. are connected to the load and the satellite body at the same time to transfer Pressing force, when released, pyrotechnics, fuses and other energy sources convert chemical energy and electrical energy into mechanical energy and thermal energy to cut off the connection and release the load. The above compression release device requires the separation surface to be perpendicular to the direction of application of the compression force, and to be perpendicular to the tangent direction of the initial movement track after the load is released, that is, the separation action is coupled with the movement of the mechanism; the movement of the load is constrained by the separation surface. After unlocking, it can only be Directional motion has poor adaptability to loads with complex motion envelopes and complex motion processes; at the same time, the perforated compaction method often requires opening holes on the load surface, which cannot meet the requirements of high-precision reflective surfaces and other loads with high surface requirements.

Contents of the invention

In view of this, the present invention provides a swing type compression release device, which does not rely on the separation action of the load movement, and can realize the reliable connection between the load and the satellite body in the compression state.

The technical scheme that the present invention adopts is as follows:

A swing type compression release device, comprising a swing arm assembly, a flexible capture assembly, a compression seat, a release device and a rotating shaft assembly;

The swing arm assembly is fixedly connected to the load through clamping, while the swing arm assembly and the pressing seat are rotationally connected through the rotating shaft assembly, and the pressing seat is used for fixed connection with the external star body; the center of the pressing seat is provided with a release device for releasing the swing arm Components; flexible catch components are arranged on both sides of the pressing seat, and when the swing arm component is released, the capture of the swing arm component is realized through the flexible deformation of the flexible capture component.

Further, the swing arm assembly includes a swing arm, a compression connector, a force nut, a recovery spring, a fixing nut, a guide plate and a recovery cylinder assembly;

The swing arm assembly is a symmetrical structure, and the two sides are connected by a compression connector. Taking one side as an example, the upper end of the swing arm is provided with a locking groove for clamping the load; the lower end of the swing arm is used to connect with the compression connector. connect;

The recovery cylinder assembly is fixed on the outer side of the lower end of the swing arm, the end of the compression connector is fixedly connected with the booster nut, the booster nut is covered with a recovery spring, and the guide plate press-fits the recovery spring on the outer end surface of the swing arm , the guide plate is fixed on the compression connector through a fixing nut.

Further, the recovery cylinder assembly includes a cylinder body, a buffer element, a bearing plate and a capture column;

One end of the cylinder is open, the other end has a hole in the center, and a flange is provided on the outside of the open end for fixed connection with the swing arm; the bearing plate fixes the buffer element on the inner wall of the center hole; the capture column It is cylindrical and located on the edge of the flange, and is captured by the flexible catch assembly after the swing arm swings out.

Further, the flexible capture assembly includes four flexible sheets, two flexible sheets form a group, encircling the outer circumference of the recovery cylinder assembly, and the two groups are axially symmetrical with respect to the load movement direction; taking one flexible sheet as an example, it includes a guide sheet and storage department;

A storage slot and an installation interface are provided on the storage part, and the guide plate and the plane where the storage slot is located form a certain angle; the flexible capture component is installed on both sides of the pressing seat through the installation interface.

Further, the pressing seat is provided with a release device channel, a shaft hole, a pressing connector channel, an anti-rotation pin hole, and a flexible capture component installation interface;

The channel of the release device and the channel of the compression connector are cylindrical holes, and the axes intersect at one point, which are respectively used to install the release device and the compression connector; the anti-rotation pin hole is set on the side of the compression seat, and the rotation shaft hole and the anti-rotation pin The holes intersect at 90°, and the rotation of the rotating shaft assembly is constrained by inserting a limiting part into the anti-rotation pin hole.

Further, the release device is located between the two swing arms, and cuts off the compression connection by mechanical energy or thermal energy.

Further, the shaft assembly includes a shaft, a coil spring and a slide;

There are hexagonal grooves on both ends of the rotating shaft, which can be twisted by the corresponding hexagonal wrench to force the coil spring; there are round holes at both ends of the rotating shaft, which are used to cooperate with the anti-rotation pin holes and limit parts to realize the axial direction of the rotating shaft assembly. Positioning and rotation constraints;

One end of the coil spring is connected to the rotating shaft, and the other end is connected to the swing arm assembly. The sliding plate is a hollow cylinder fixed on both ends of the rotating shaft, and is located between the pressing seat and the swing arm assembly, and there is a gap between them.

Further, the swing arm is T-shaped, and the vertical side of the T-shape is provided with a rectangular relief groove, a spherical segment-shaped lubrication groove, a central through hole, a limit post and a shaft hole;

The rotating shaft hole is used to cooperate with the rotating shaft assembly, and the limit post is set at the lower end of the swing arm to cooperate with the pressing seat; the central through hole intersects with the lubrication groove and the axis passes through the center of the lubrication groove; the T-shaped lateral side is provided with a convex part , the locking groove is arranged on the convex part, which is a trapezoidal groove.

Further, the outer bottom of the pressing seat is provided with chamfers for cooperating with the limit post to prevent the swing arm assembly from moving out of control.

Further, the swing arm assembly also includes a lubricating pad placed in a spherical segment-shaped lubricating groove;

The lubricating pad is composed of a spherical section and a cylindrical section, wherein the diameter of the spherical section is smaller than the diameter of the lubricating groove.

Beneficial effect:

1. The invention realizes the reliable connection between the load and the satellite body in the compressed state by clamping the cylindrical and prismatic structure of the inherent structure of the load. Compared with the traditional compression and release device, which is partly connected to the load, there is no need to connect the load to the load. Drill holes on the top and install related parts of the compression rod connector to simplify the load configuration, avoid secondary design of the load structure, and reduce additional mass.

Secondly, through the reasonable layout of the swing arm assembly, the pressing seat, and the rotating shaft assembly, the symmetrical active swinging of the large gap and the separation action independent of the load movement are realized. The load can move in any direction, which improves the load kinematics design. Flexibility, while reducing the risk of hooking of the compression release device and increasing the reliability of separation; compared with the one-way release of the traditional compression release device, symmetrical swinging can further reduce the unlocking impact and optimize the mechanical environment of the load.

Furthermore, through the flexible capture of the flexible capture component, the effective storage of the swing arm component is realized. Compared with the traditional compression release device, the above-mentioned part can be stored near the designated position, and the flexible deformation of the material is used to realize the capture function. Lightweight and reusable, it improves economic efficiency.

2. The present invention can effectively design the storage position of the swing arm component by modifying the position of the installation interface on the flexible capture component and the shape of the storage groove, so as to avoid interference with the star.

3. The paired swing arms of the present invention can clamp the load through the locking grooves provided on them, and the locking grooves of the present invention are trapezoidal grooves, which can effectively restrain the load and facilitate separation when unlocking.

4. The sliding plate of the present invention is located between the pressing seat and the swing arm assembly, and there is a small gap with the two, which can play the role of limiting and lubricating between the two.

5. The outer bottom of the pressing seat of the present invention is provided with chamfers, which are used to cooperate with the limit post to prevent the swing arm assembly from moving out of control.

6. The lubricating pad of the present invention is composed of a spherical section and a cylindrical section, wherein the diameter of the spherical section is smaller than that of the lubricating groove, which can ensure that the lubricating pad rotates at a small angle in the lubricating groove.

Description of drawings

Fig. 1 is a structural schematic diagram of the present invention in a compressed state.

Fig. 2 is a structural schematic diagram of the present invention in an unlocked state.

Figure 3 is a side view of the load.

Fig. 4 is a structural schematic diagram of the swing arm assembly.

Fig. 5(a), Fig. 5(b) and Fig. 5(c) are the left view, right view and cross-sectional view of the swing arm respectively.

Fig. 6 is a schematic structural view of the recovery cylinder assembly.

Figure 7(a) and Figure 7(b) are the front view and side view of the flexible capture component, respectively.

Figure 8(a) and Figure 8(b) are the sectional view and side view of the pressing seat respectively.

Fig. 9 is a schematic structural view of the shaft assembly.

Among them, 1-swing arm assembly; 11-swing arm; 111-lightening groove; 112-lubricating groove; 113-central hole; 114-limit post; 12-compression connector; 13-lubricating pad; 14-energized nut; 15-recovery spring; 16-fixed nut; 17-guiding plate; 18-recovery cylinder assembly; - bearing plate; 184 - capture column;

2-flexible capture component; 21-guide piece; 22-storage slot; 23-installation interface;

3-pressing seat; 31-release device channel; 32-rotating shaft hole; 33-pressing connector channel; 34-anti-rotation pin hole; 35-bottom plate; 36-flexible capture assembly installation interface;

4 - Release device;

5-rotating shaft assembly; 51-rotating shaft; 52-coil spring; 53-slide.

Detailed ways

The present invention will be described in detail below with reference to the accompanying drawings and examples.

The invention provides a swing-type compression release device, which can provide reliable compression when the expansion mechanism is folded, and does not require additional mass or openings on the expansion mechanism or its scientific load. A six-degree-of-freedom movement space within a certain range is provided for the unfolding mechanism.

As shown in FIG. 1 , FIG. 2 , and FIG. 3 , the swing-type compression release device includes: a swing arm assembly 1 , a flexible catch assembly 2 , a compression seat 3 , a release device 4 and a rotating shaft assembly 5 .

The swing arm assembly 1 is fixedly connected to the load by clamping, while the swing arm assembly 1 and the pressing seat 3 are rotationally connected through the rotating shaft assembly 5, and the pressing seat 3 is fixedly connected with the external star by means of screws or the like; the center of the pressing seat 3 is provided with The release device 4 is used to release the swing arm assembly 1; the flexible catch assembly 2 is arranged on both sides of the pressing seat 3, and when the swing arm assembly 1 is released, the capture of the swing arm assembly 1 is realized through the flexible deformation of the flexible catch assembly 2.

As shown in Figure 4, in order to realize the clamping, locking and rotating functions of the swing arm assembly 1, the swing arm assembly 1 in this embodiment includes a swing arm 11, a compression connector 12, a lubricating pad 13, a force nut 14, a recovery Spring 15, fixed nut 16, guide plate 17 and recycling cylinder assembly 18.

The swing arm assembly 1 is a symmetrical structure, and the two sides are connected by pressing the connecting piece 12. Taking one side as an example, the upper end of the swing arm 11 is provided with a locking groove 117 for clamping the load; the lower end of the swing arm 11 is used for pressing The tight connector 12 is connected; the recovery cylinder assembly 18 is fixed on the outer side of the lower end of the swing arm 11, the end of the compression connector 12 is fixedly connected with the force nut 14, the force nut 14 is covered with the recovery spring 15, and the guide plate 17 will recover the spring 15 Press-fitted on the outer end surface of the swing arm 11 , the guide plate 17 is fixed on the compression connector 12 through the fixing nut 16 .

As shown in Figure 5a, Figure 5b, and Figure 5c, the swing arm 11 is T-shaped as a whole, and the vertical side of the T-shape is provided with a rectangular lightening groove 111, a spherical segment-shaped lubrication groove 112, a central through hole 113, a limit post 114 and a shaft hole 115; wherein, the rotating shaft hole 115 is used to cooperate with the rotating shaft assembly 5, and the limit post 114 is arranged at the lower end of the swing arm 11 to cooperate with the pressing seat 3; the central through hole 113 intersects with the lubricating groove 112 and the axis passes through the lubricating groove 112 The center of the sphere; the T-shaped lateral side is provided with an outer convex portion, that is, the front end 116 of the swing arm, and the locking groove 117 is arranged on the front end 116 of the swing arm, wherein the pair of swing arms 11 pass through the locking groove 117 to realize the clamping of the load. Preferably, the locking groove 117 is a trapezoidal groove, and the projections of the locking groove 117 on its two symmetrical planes are both trapezoidal, which can effectively restrain the load and facilitate separation during unlocking. The included angle between the above-mentioned trapezoidal surface and the corresponding symmetrical plane can be taken as 30°. The diameter of the central through hole 113 should be determined according to the diameter of the compression connector 12 and the deformation angle of the swing arm 11 after the pre-tightening force is applied, so that the compression rod connector 12 does not interfere with the central through hole 113, a reasonable set The diameter data is that the diameter of the central through hole 113 is 6.5mm, and the diameter of the compression connector 12 is 4.3mm.

The compression connector 12 is long and multi-stage cylindrical; the middle is a fixed-length cylinder, and the two ends are threaded. The threaded end can be connected with the booster nut 14 and the fixed nut 16. By controlling the rotation angle of the booster nut 14, it can realize Control over the length of a fixed-length cylinder to apply a specific preload. The rotation control of the reinforcing nut 14 should be applied symmetrically and slowly, so as to prevent the compression connecting piece 12 from being bent.

The lubricating pad 13 is placed in the spherical segment-shaped lubricating groove 112; the lubricating pad 13 is composed of a spherical section and a cylindrical section, wherein the diameter of the spherical section is smaller than the diameter of the lubricating groove 112 to ensure that the lubricating pad 13 can rotate in a small angle in the lubricating groove 112.

The recovery spring 15 is a hollow cylindrical spring, and it should be ensured that one end is always in contact with the swing arm 11 and the other end is in contact with the guide plate 17 in the released state.

The guide disc 17 is a hollow cylinder, and the two sides of the cylinder surface should have rounded corners to accommodate deflection during the guiding process.

As shown in FIG. 6 , the recovery cylinder assembly 18 includes a cylinder body 181 , a buffer element 182 , a bearing plate 183 and a capture column 184 .

One end of cylinder body 181 is open, and the other end has a hole in the center, and a square flange is provided on the outside of the open end for fixed connection with swing arm 11; bearing plate 183 fixes buffer element 182 on the inner wall of the central opening end, and buffer element 182 , bearing plate 183 are hollow cylinders, with the ability to buffer the impact force of the guide plate 17; capture column 184 is columnar, located on the edge of the square flange, corresponding to the position of the flexible capture component 2, after the swing arm 11 is opened, the flexible capture component 2 captures. Preferably, a ball head is added to the cylindrical end of the capture column 184, which is more conducive to the entry of the flexible capture component 2. According to the test results, the capture effect is the best when the ball head of the capture column 184 exceeds the installation interface 23 by 1.5 mm.

As shown in Figure 7a and Figure 7b, the flexible capture assembly 2 includes four flexible sheets, two flexible sheets form a group, encircling the outer circumference of the recycling cylinder assembly 18, and the two groups are axially symmetrical about the direction of load movement; For example, it includes a guide piece 21 and a storage portion.

A storage groove 22 and an installation interface 23 are provided on the storage part, and the guide plate 21 forms a certain angle with the plane where the storage groove 22 is located to play a guiding function; Preferably, the flexible capture component 2 uses a 0.1mm thick copper sheet that can maintain the basic shape and withstand a large force. Although its density is higher than that of commonly used aluminum alloys and titanium alloys, the volume reduction factor is more significant, so the weight is lighter . By modifying the position of the installation interface 23 and the shape of the receiving groove 22, the storage position of the swing arm assembly 1 can be effectively designed to avoid interference with the star.

As shown in Fig. 8a and Fig. 8b, the pressing seat 3 is provided with a release device channel 31, a rotating shaft hole 32, a pressing connector channel 33, an anti-rotation pin hole 34, a bottom plate 35 and a flexible capture component installation interface 36.

Wherein the release device channel 31 and the compression connector channel 33 are cylindrical holes, and the axes intersect at one point, and are respectively used for installing the release device 4 and the compression connector 12; the anti-rotation pin hole 34 is arranged on the side of the compression seat, and the rotating shaft The hole 32 intersects with the anti-rotation pin hole 3490°, and the rotation of the rotating shaft assembly 5 is constrained by inserting a limiting part in the anti-rotation pin hole 34 . There is a chamfer on the open side of the bottom plate 35, which can cooperate with the limit post 114 to prevent the swing arm assembly 1 from moving out of control. The flexible capture component installation interface 36 is used for installing the flexible capture component 2 .

Preferably, since the swing arm assembly 1 rotates in one direction, the channel 33 of the compression connector may not be symmetrical with respect to the compression connector 12 in the compressed state, so as to fully exert the anti-interference function of the channel 33 of the compression connector. By reasonably adjusting the distance between the pressing seat 3 and the front end 116 of the swing arm, and correspondingly modifying the gap between the rotating shaft 51 and the rotating shaft hole 115, the rotating shaft 51 can be kept out of the main force transmission path to ensure reliable swing function.

The release device 4 is located between the two swing arms 11, and can cut off the compression connection part 12 by means of mechanical energy and heat energy. Preferably, the release device 4 can use a fuse or the like to further reduce the impact force.

As shown in FIG. 9 , the shaft assembly 5 includes a shaft 51 , a coil spring 52 and a slide 53 .

The two ends of the rotating shaft 51 are provided with hexagonal grooves, which are twisted by the corresponding hexagon wrench to add force to the coil spring 52; at the same time, there is a small plane in the center of the cylinder, which can fix the starting end of the coil spring 52; the two ends of the rotating shaft 51 are provided with round The hole is used to cooperate with the anti-rotation pin hole 34 and the limiting part to realize the axial positioning and rotation constraint of the rotating shaft assembly 5;

One end of the coil spring 52 is connected to the rotating shaft 51, and the other end is connected to the swing arm 11. The sliding plate 53 is a hollow cylinder fixed on both ends of the rotating shaft 51, and is located between the pressing seat 3 and the swing arm 11, and there is a gap between them. It can play the role of limiting and lubricating between the two.

During the swinging process of the swing arm 11, the movement track direction of the locking groove 117 needs to be kept away from the load, so that the movement envelope of the cut-off locking connector 12 does not interfere with the channel 33 of the pressing connector, and at the same time, it can adapt to the swing arm 11 and the shaft assembly 5 Axis uncertainty due to gaps.

The swing-type compression release device of the present invention can effectively compress a 2kg load under 15g sinusoidal excitation at 0-100Hz. The motion form after the release is a linear motion, and at the same time, there is no need to add additional mass or punch holes to the load, and the impact is released. Compared with the traditional compression release device, it is 60% lower, and it can also adapt to lightweight loads with complex motion envelopes and complex motion processes and their precision deployment mechanisms through reasonable modification of parameters.

The working principle of the present invention is:

In the compressed state, the two swing arms 11 hold the cylindrical or prismatic part of the load tightly, and the compression connector 12 is tightened so that the swing arm 11 is close to the compression seat 3 to generate a specified compression force, and the compression seat 3 is fixedly connected with the star body, so as to realize the reliable connection between the load and the star body and the application of pre-tightening force; in the released state, the release device 4 fixedly installed on the compression seat 3 works, and the compression connector 12 is cut off, and the two swing arms 11 rotates around the rotating shaft assembly 5 and the pressing seat 3 at a fixed axis, and is finally captured by the flexible catching assembly 2 through the catching column 184, thereby realizing reliable pressing, releasing and moving parts storage functions.

To sum up, the above are only preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims (10)

1. A swing type compaction release device is characterized by comprising a swing arm component, a flexible capture component, a compaction seat, a release device and a rotating shaft component;

the swing arm assembly is fixedly connected with a load through clamping, meanwhile, the swing arm assembly is rotatably connected with the pressing seat through the rotating shaft assembly, and the pressing seat is fixedly connected with an external star body; the center of the pressing seat is provided with a release device used for releasing the swing arm component; the two sides of the pressing seat are provided with flexible capturing assemblies, and after the swing arm assembly is released, the swing arm assembly is captured through flexible deformation of the flexible capturing assemblies.

2. The oscillating pinch release device of claim 1, wherein the swing arm assembly comprises a swing arm, a pinch connection, a force nut, a recovery spring, a retaining nut, a guide disc, and a recovery cylinder assembly;

the swing arm assembly is of a symmetrical structure, two side structures are connected through a compression connecting piece, and the upper end of the swing arm is provided with a locking groove for clamping a load by taking one side as an example; the lower end of the swing arm is used for being connected with the pressing connecting piece;

the recovery cylinder assembly is fixed on the outer side of the lower end of the swing arm, the end part of the compression connecting piece is fixedly connected with the stress application nut, the stress application nut is sleeved with the recovery spring in a sleeved mode, the recovery spring is pressed on the end face of the outer side of the swing arm through the guide disc, and the guide disc is fixed on the compression connecting piece through the fixing nut.

3. The oscillating hold down release device of claim 2, wherein the recovery drum assembly includes a cylinder body, a cushion member, a force bearing plate, and a catch post;

one end of the cylinder body is open, the center of the other end of the cylinder body is provided with a hole, and the outer side of the open end is provided with a flange for fixedly connecting with the swing arm; the bearing plate fixes the buffer element on the inner wall surface of the central opening end; the capturing column is cylindrical and is positioned at the edge of the flange, and the swinging arm is swung open and then captured by the flexible capturing component.

4. The oscillating hold down release device of claim 2, wherein said flexible catch assembly comprises four flexible tabs, one set of two flexible tabs encircling the outer circumference of the recovery drum assembly, the two sets being axisymmetric with respect to the direction of load motion; take a flexible sheet as an example, which comprises a guide sheet and a receiving part;

the accommodating part is provided with an accommodating groove and an installation interface, and the guide sheet and the plane where the accommodating groove is located form a certain included angle; the flexible capture assemblies are mounted on two sides of the pressing seat through mounting interfaces.

5. The oscillating hold down release device of any one of claims 1 to 4, wherein the hold down seat is provided with a release device channel, a rotating shaft hole, a hold down connector channel, an anti-rotation pin hole, and a flexible capture assembly mounting interface;

the releasing device channel and the pressing connecting piece channel are cylindrical holes, and the axes of the releasing device channel and the pressing connecting piece channel are intersected at one point and are respectively used for installing a releasing device and a pressing connecting piece; prevent changeing the pinhole setting and compressing tightly the seat side, the pivot hole intersects 90 with preventing changeing the pinhole, restricts pivot subassembly self through inserting spacing part in preventing changeing the pinhole and rotate.

6. The oscillating press release device of claim 5, wherein the release device is located between two oscillating arms, and the press connection is severed by mechanical or thermal energy.

7. The swing type impact release device according to claim 5, wherein the rotary shaft assembly includes a rotary shaft, a coil spring, and a slide;

hexagonal grooves are formed in two end faces of the rotating shaft, and the hexagonal grooves are twisted into coil springs to apply force through corresponding inner hexagonal wrenches; round holes are formed in the two ends of the rotating shaft and used for being matched with the anti-rotation pin holes and the limiting parts to achieve axial positioning and rotation constraint of the rotating shaft assembly;

one end of the coil spring is connected with the rotating shaft, one end of the coil spring is connected with the swing arm assembly, the sliding piece is a hollow cylinder and is fixed at two ends of the rotating shaft, and meanwhile, the sliding piece is located between the pressing base and the swing arm assembly and has a gap with the pressing base and the swing arm assembly.

8. The swing type compaction release device according to any one of claims 2 to 4, wherein the swing arm is T-shaped, and a vertical edge of the T-shape is provided with a rectangular lightening groove, a segment-shaped lubrication groove, a central through hole, a limiting post and a rotating shaft hole;

the rotating shaft hole is used for being matched with the rotating shaft assembly, and the limiting column is arranged at the lower end of the swinging arm and is used for being matched with the pressing seat; the central through hole is intersected with the lubricating groove, and the axis of the central through hole passes through the spherical center of the lubricating groove; the T-shaped transverse edge is provided with an outer convex part, and the locking groove is arranged on the outer convex part and is a trapezoidal groove.

9. The oscillating hold-down release device of claim 8, wherein the hold-down seat is chamfered at the bottom of the outer side thereof for engagement with a stop post to prevent uncontrolled movement of the swing arm assembly.

10. The oscillating hold-down release device of claim 8, wherein said swing arm assembly further includes a lubrication pad disposed within a segment shaped lubrication groove;

the lubricating pad is composed of a spherical section and a cylindrical section, wherein the diameter of the spherical section is smaller than that of the lubricating groove.

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