Variable-load thrust-controllable reusable multi-point synchronous pushing and punching connecting device

Abstract

The invention discloses a variable-load thrust-controllable reusable multi-point synchronous pushing and punching connecting device. The device overcomes the problem that an existing thrust device can only be matched with a specific mass load, active thrust control is achieved in a damping oil liquid mode, the no-load driving speed serves as a reference value of the device, the final driving speed tends to the reference speed no matter how large the inertia mass of the driving load is, controllable thrust under different load masses is achieved, and the thrust driving efficiency is improved. And meanwhile, the thrust is controllable by adjusting the damping hole. In addition, the problem that an existing thrust device cannot be repeatedly used is solved, the device can be repeatedly used only by replacing part of structures through decoupling fire work and force transmission pushing and punching structures, and the cost of the device is greatly reduced. The device also overcomes the problem of asynchronous multi-point unlocking pushing and punching, ensures the synchronism of multi-point unlocking pushing and punching from the mechanical structure level through a'one-string-many 'multi-point synchronous transmission device, does not need to be ensured through ignition time, and greatly improves the reliability of multi-point synchronous unlocking pushing and punching of the device.

Description

Technical Field

[0001] This invention relates to the technical field of spacecraft structures, and in particular to a reusable multi-point synchronous thrust connection device with variable load and controllable thrust. Background Technology

[0002] Spacecraft structures involve various scenarios requiring connection and thrust-driven separation, such as star-rocket separation and wing / rudder deployment. Traditional connection, unlocking, and thrust-driven systems typically involve multiple devices working in coordination. The unlocking and thrusting actions are two complex timing control processes. If multiple thrusting devices are present, there will be multiple points of asynchrony, leading to low overall system reliability. Furthermore, existing thrust devices can only be matched with specific mass loads, and the thrust is often uncontrollable, resulting in large thrust impacts. The resulting transient shocks can severely impact sensitive and precision instruments and equipment inside modern spacecraft. Summary of the Invention

[0003] This invention provides a reusable multi-point synchronous thrust connection device with variable load and controllable thrust. This device enables multi-point synchronous thrusting and allows for thrust-controlled separation for different thrusting loads. It also allows for the reusability of some components, making it suitable for future high-precision, low-cost thrust separation scenarios.

[0004] In a first aspect, a reusable multi-point synchronous thrust connection device with controllable variable load thrust is provided, comprising: a hydraulic fire-operating device, a multi-point synchronous transmission device, multiple hydraulic output devices, and a thruster. The hydraulic fire-operating device is connected between the actuating air source and the multi-point synchronous transmission device. The multi-point synchronous transmission device is provided with multiple transmission interfaces, which are connected one-to-one with multiple hydraulic output devices. Each hydraulic output device is connected to the thruster, and the thruster is used to unlock the first unlocking component and the second unlocking component of the load.

[0005] In conjunction with the first aspect, in some implementations of the first aspect, the hydraulic fire-operating device includes a first cylinder, a first piston, a second piston, and a second cylinder;

[0006] The first cylinder has an actuation air source inlet at its first end and a cavity, in which a first piston is disposed. The second end of the first cylinder is threadedly connected to the second cylinder. After the actuation air source is introduced, it enters the cavity through the actuation air source inlet and pushes the first piston toward the second cylinder.

[0007] The second cylinder has a high-pressure oil chamber; the second piston is installed in the high-pressure oil chamber of the second cylinder; in addition, the side of the second cylinder facing the first cylinder has a first cylinder opening, through which the first piston passes to abut against the second piston; the side of the second cylinder away from the first cylinder has a second cylinder opening, through which the second piston passes to connect with the subsequent multi-point synchronous transmission device.

[0008] The second piston itself has a low-pressure oil chamber, and the side wall of the second piston is provided with a damping hole. The damping hole connects the high-pressure oil chamber and the low-pressure oil chamber, and the high-pressure oil chamber is filled with oil.

[0009] In conjunction with the first aspect, in some implementations of the first aspect, in the initial state, the low-pressure oil chamber is not filled with oil, and the oil in the high-pressure oil chamber cannot directly enter the low-pressure oil chamber due to the restriction of the damping orifice.

[0010] When the first piston moves toward the second cylinder under the push of the actuating air source, the second piston is pushed by the first piston and moves in the high-pressure oil chamber of the second cylinder. On the one hand, it squeezes the liquid oil in the high-pressure oil chamber, and the liquid oil in the high-pressure oil chamber enters the low-pressure oil chamber through the damping hole. On the other hand, it pushes the multi-point synchronous transmission device to move away from the hydraulic fire working device.

[0011] In conjunction with the first aspect, in some implementations of the first aspect, the first piston and the inner wall of the first cylinder are sealed together by a sealing ring to ensure that the first piston is completely sealed in the cavity; the side wall of the second piston is tightly attached to the inner wall of the second cylinder by a sealing ring to ensure that the cavity is completely sealed; a sealing ring is provided on the inner wall of the second cylinder opening, and the sealing ring is tightly attached to the outer wall of the second piston to ensure that the high-pressure oil cavity is completely sealed.

[0012] In conjunction with the first aspect, in some implementations of the first aspect, the hydraulic output device includes a third piston, an adapter, and a third cylinder; a first end of the third piston is connected to a transmission interface of a multi-point synchronous transmission device; the third cylinder is connected between the third piston and the adapter; a liquid cavity is formed inside the third cylinder; the first end of the third cylinder has a third cylinder opening, through which the third piston passes and is movable within the liquid cavity;

[0013] The adapter includes a first adapter end, a second adapter end, and an adapter pipe connecting the first adapter end and the second adapter end; the first adapter end is used to connect to the second end of the third cylinder and seal the liquid cavity; the cavity formed at the center of the second adapter end is a liquid cavity; the adapter pipe has a liquid cavity at its center, and the liquid cavities are connected between the liquid cavities; the adapter is connected to the pusher behind it through the second adapter end.

[0014] In conjunction with the first aspect, in some implementations of the first aspect, the multi-point synchronous transmission device transmits the driving force from the hydraulic fire working device to the third piston of the hydraulic output device, and then the third piston squeezes the liquid oil in the liquid chamber; the liquid oil in the liquid chamber enters the liquid chamber through the liquid chamber, and the liquid chamber is the actuation source of the subsequent pusher.

[0015] In conjunction with the first aspect, in some implementations of the first aspect, the outer wall of the third piston is tightly attached to the inner wall of the third cylinder by a sealing ring to ensure complete sealing inside the liquid chamber; the oil diameter of the liquid chamber is smaller than the oil diameter of the liquid chamber, and the oil diameter of the liquid chamber is smaller than the oil diameter of the liquid chamber.

[0016] In conjunction with the first aspect, in some implementations of the first aspect, the pusher includes a split nut, a piston rod, a piston cylinder, an adapter nut, and a pressure plate;

[0017] Both the first and second unlocking components of the load have through holes at their unlocking positions, with the two through holes facing each other and communicating with each other. The first unlocking component is equipped with a piston cylinder. The first end of the piston cylinder is connected to an adapter. The second end of the piston cylinder is threadedly fixedly connected to the through hole at the unlocking position of the first unlocking component. The second unlocking component is equipped with an adapter nut and a pressure plate. The first end of the adapter nut is threadedly fixedly connected to the through hole at the unlocking position of the second unlocking component. The opening at the first end of the adapter nut is facing each other and communicating with the opening at the second end of the piston cylinder, for accommodating the split nut. In the initial unlocked state, the split nut connects the piston cylinder and the adapter nut together through its outer circumferential thread. The second end of the adapter nut presses against the pressure plate. The adapter nut is used to transmit the unlocking driving force to the pressure plate.

[0018] The piston rod is housed in the piston cylinder. The first end of the piston rod is used to bear the thrust of the liquid chamber, so that the piston rod moves in the piston cylinder under the push of the liquid oil in the liquid chamber. The second end of the piston rod is engaged in the split nut in the initial unlocked state to ensure that the outer circumference of the split nut is in contact with the inner wall of the piston cylinder and the adapter nut. The piston cylinder also has a step to limit the stroke of the piston rod to prevent the piston rod from coming out of the piston cylinder.

[0019] In conjunction with the first aspect, in some implementations of the first aspect, after the unlocking is initiated, the hydraulic oil in the fluid chamber pushes the piston rod toward the second unlocking component under load. The second end of the piston rod releases its support from the split nut, and the outer periphery of the split nut disengages from the piston cylinder and the adapter nut. Subsequently, the hydraulic oil in the fluid chamber continues to push the piston rod, and the second end of the piston rod presses against the adapter nut, thereby applying a force on the pressure plate and pushing the second unlocking component away from the first unlocking component. When the piston rod moves to the step inside the piston cylinder, the piston rod stops moving forward, and the second unlocking component continues to move forward under inertia, completely disengaging from the first unlocking component.

[0020] In conjunction with the first aspect, in some implementations of the first aspect, the number of hydraulic output devices is greater than or equal to three.

[0021] Compared with the prior art, the solution provided by the present invention has at least the following beneficial technical effects:

[0022] (1) The structure is compact and is an integrated device that combines connection, unlocking and pushing functions. It has high energy utilization through a single energy source.

[0023] (2) To achieve controllable thrust under variable load, the device uses the interaction between the driving force of the actuating air source and the damping force of the liquid. When the speed is too slow, the driving force of the actuating air source accelerates the piston, and when the speed is too fast, the damping force of the oil slows it down. It makes full use of the actuating air source and the damping oil to achieve the active speed control effect of the piston. With the no-load driving speed as its reference value, no matter how large the inertial mass of the driving load is, the final driving speed will tend to the reference speed. The smaller the inertial mass, the faster this trend is, thus achieving controllable thrust under different load masses.

[0024] (3) The thrust is stable and adjustable. The variable displacement cavity outputs a stable thrust by using damping oil and transmission hydraulic fluid. At the same time, the size of the damping orifice 3.2 can be adjusted according to the actual situation to achieve thrust adjustment. The entire device uses damping oil and transmission hydraulic fluid to make the thrust change smoothly without sudden impact.

[0025] (4) After the device is in operation, it forms a closed cavity with good sealing performance, no external pollution, light weight, and convenient installation.

[0026] (5) The structure can be reused. Only the hydraulic fire working device is in direct contact with the actuating gas source and combustion products. After the work is completed, the first cylinder 1 and the first piston 2 in the hydraulic fire working device are removed, the thrust device is reversed and reset, and a new first cylinder 1, the first piston 2 and the actuating gas source 1 are replaced. It can only be reused.

[0027] (6) To achieve multi-point synchronous unlocking and pushing, the synchronization of multi-point unlocking and pushing is guaranteed from the mechanical structure level through a multi-point synchronous transmission device of "one series of many". Attached Figure Description

[0028] Figure 1 The structural outline of a reusable multi-point synchronous thrust connection device with controllable variable load thrust.

[0029] Figure 2 Schematic diagram of a reusable multi-point synchronous thrust connection device with controllable variable load thrust.

[0030] Figure 3 This is a schematic diagram of the connection principle of a reusable multi-point synchronous thrust connection device with controllable variable load thrust.

[0031] Figure 4 This is a schematic diagram of the pusher connection principle.

[0032] Figure 5 This is a schematic diagram of the hydraulic fire-starting device.

[0033] Figure 6 This is a schematic diagram of the structure of a multi-point synchronous transmission device.

[0034] Figure 7 This is a schematic diagram of the hydraulic output device.

[0035] Figure 8 This is a schematic diagram of the pusher unlocking principle.

[0036] Figure 9 This is a schematic diagram of the pusher's pushing principle. Detailed Implementation

[0037] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0038] like Figures 1 to 3 As shown, this invention provides a reusable multi-point synchronous thrust connection device with controllable variable load thrust, including a hydraulic firing actuator, a multi-point synchronous transmission device 5, multiple hydraulic output devices, and a thruster (such as...). Figure 4 As shown in the figure, the hydraulic fire-starting device is connected to the actuating air source, and the hydraulic output device is connected to the pusher. Figure 3 The gray box in the middle shows the threaded connection.

[0039] like Figure 5 As shown, the hydraulic fire-operating device includes a first cylinder 1, a first piston 2, a second piston 3, and a second cylinder 4.

[0040] The first cylinder 1 has an actuating gas inlet 1.1 at its first end and a cavity 1.3, within which the first piston 2 is disposed. The second end of the first cylinder 1 is threadedly connected to the second cylinder 4. The first cylinder 1 serves as the connection inlet and working channel for the actuating gas source 1.1, and is connected to the thread 4.2 of the second cylinder 4 via thread 1.2. The second cylinder 4 is screwed to the bottom of the step at the second end of the first cylinder 1 for positioning. After the actuating gas source is introduced, it enters the cavity 1.3 through the actuating gas inlet 1.1 (e.g., a Y-shaped gas channel), which pushes the first piston 2 toward the second cylinder 4. The actuating gas source 1.1 is an element or device that generates high-pressure gas, typically an igniter for pyrotechnic devices. The first piston 2 is completely sealed within the cavity 1.3 by a sealing ring 2.1 between it and the inner wall of the first cylinder 1.

[0041] The second cylinder 4 has a high-pressure oil chamber 4.3. The second piston 3 is installed within the high-pressure oil chamber 4.3 of the second cylinder 4. The second piston 3 is positioned near the first cylinder 1 by fitting tightly against the flange of the second cylinder 4. The sidewall of the second piston 3 is sealed to the inner wall of the second cylinder 4 by a sealing ring 3.1, ensuring a complete seal within the cavity 4.3. Furthermore, the side of the second cylinder 4 facing the first cylinder 1 has a first cylinder opening through which the first piston 2 can pass to abut against the second piston 3. The side of the second cylinder 4 away from the first cylinder 1 has a second cylinder opening through which the second piston 3 can pass to connect with the subsequent multi-point synchronous transmission device 5. Figure 5 and Figure 6 As shown, the second piston 3 can be connected to the thread 5.1 of the multi-point synchronization device 5 via thread 3.3. Additionally, the second piston 3 itself has a low-pressure oil chamber 3.4, and a damping hole 3.2 is provided on the side wall of the second piston 3. The damping hole 3.2 connects the high-pressure oil chamber 4.3 and the low-pressure oil chamber 3.4. A sealing ring 4.1 is provided on the inner wall of the second cylinder 4's opening. The sealing ring 4.1 is tightly fitted to the outer wall of the second piston 3, ensuring a complete seal within the high-pressure oil chamber 4.3.

[0042] The high-pressure oil chamber 4.3 is filled with oil. In the initial state, the low-pressure oil chamber 3.4 may not be completely filled with oil. Under the influence of the damping orifice 3.2 and surface tension, the oil in the high-pressure oil chamber 4.3 cannot directly enter the low-pressure oil chamber 3.4 without external force. When the first piston 2 moves towards the second cylinder 4 under the push of the actuating air source, the second piston 3 can be pushed by the first piston 2 and move in the high-pressure oil chamber 4.3 of the second cylinder 4. On the one hand, it squeezes the oil in the high-pressure oil chamber 4.3, and the oil in the high-pressure oil chamber 4.3 can enter the low-pressure oil chamber 3.4 through the damping orifice 3.2. On the other hand, it pushes the multi-point synchronous transmission device 5 to move away from the hydraulic fire working device.

[0043] like Figure 6 As shown, the first end of the multi-point synchronous transmission device 5 is connected to the hydraulic actuator via thread 5.1. Specifically, the first end of the multi-point synchronous transmission device 5 is connected to the thread 3.3 of the second piston 3 via thread 5.1, and screwed to the bottom for positioning. The second end of the multi-point synchronous transmission device 5 is provided with multiple transmission interfaces, each corresponding to a different hydraulic output device. Each transmission interface is connected to the corresponding hydraulic output device via thread 5.2, and screwed to the bottom for positioning. Figure 6 In the embodiment shown, the second end of the multi-point synchronous transmission device 5 is provided with three transmission interfaces to be connected one-to-one with three hydraulic output devices.

[0044] like Figure 7As shown, the hydraulic output device includes a third piston 6, an adapter 7, and a third cylinder 8. The first end of the third piston 6 has a thread 6.1 for connection with the thread 5.2 of the multi-point synchronous transmission device 5. The third piston 6 is screwed to its bottom position. The third cylinder 8 connects the third piston 6 and the adapter 7. A liquid cavity 7.4 is formed inside the third cylinder 8. The first end of the third cylinder 8 has a third cylinder opening through which the third piston 6 passes and is movable within the liquid cavity 7.4. The outer wall of the third piston 6 is tightly fitted to the inner wall of the third cylinder 8 by a sealing ring 6.2, ensuring a complete seal within the liquid cavity 7.4. The second end of the third cylinder 8 has a fourth cylinder opening with a thread 8.1. The third cylinder 8 is connected to the thread 7.1 of the adapter 7 via the thread 8.1 and is screwed to its bottom position.

[0045] The adapter 7 includes a first adapter end, a second adapter end, and an adapter pipe connecting the first adapter end and the second adapter end. The first adapter end is used to connect to the third cylinder 8 via a thread 7.1 and to seal the liquid cavity 7.4. The cavity formed at the center of the second adapter end is a liquid cavity 7.6. The adapter pipe has a liquid cavity 7.5 at its center, which communicates between the liquid cavities 7.4 and 7.6. The outer wall of the second adapter end has a thread 7.3, and the adapter 7 is connected to the subsequent pusher via the thread 7.3.

[0046] The multi-point synchronous transmission device 5 can transmit the driving force from the hydraulic firing device to the third piston 6 of the hydraulic output device, and then the third piston 6 squeezes the hydraulic oil in the hydraulic chamber 7.4. The hydraulic oil in the hydraulic chamber 7.4 can enter the hydraulic chamber 7.6 through the hydraulic chamber 7.5, and the hydraulic chamber 7.6 is the actuation source of the subsequent pusher.

[0047] Combination Figure 4 , Figure 8 and Figure 9 The pusher is a new type of separation device that integrates three functions: connection, unlocking, and output thrust. Taking a typical pusher as an example, its main components include the split nut 9, piston rod 10, piston cylinder 11, adapter nut 12, and pressure plate 14.

[0048] The load 13 includes a first unlocking component and a second unlocking component. Both the first and second unlocking components have through holes at their unlocking locations, and the two through holes are arranged opposite to each other and are interconnected. The first unlocking component is provided with a piston cylinder 11. The first end of the piston cylinder 11 is connected to the thread 7.3 of the adapter 7. The second end of the piston cylinder 11 is fixedly connected to the through hole at the unlocking location of the first unlocking component by its outer circumferential thread. The second unlocking component is provided with an adapter nut 12 and a pressure plate 14. The first end of the adapter nut 12 is fixedly connected to the through hole at the unlocking location of the second unlocking component by its outer circumferential thread. The opening at the first end of the adapter nut 12 is arranged opposite to and is interconnected with the opening at the second end of the piston cylinder 11, and is used to accommodate the split nut 9. In the initial unlocked state, the split nut 9 connects the piston cylinder 11 and the adapter nut 12 together through its outer circumferential thread. The second end of the adapter nut 12 presses against the pressure plate 14. The adapter nut 12 is used to transmit the unlocking driving force to the pressure plate 14.

[0049] The piston rod 10 is disposed within the piston cylinder 11. The first end of the piston rod 10 bears the thrust of the liquid chamber 7.6, allowing the piston rod 10 to move within the piston cylinder 11 under the influence of the hydraulic oil in the liquid chamber 7.6. The second end of the piston rod 10, in its initial, locked state, engages with the split nut 9 to ensure that the outer circumference of the split nut 9 mates with the inner walls of the piston cylinder 11 and the adapter nut 12. The piston cylinder 11 also has steps that limit the stroke of the piston rod 10 to prevent it from dislodging from the piston cylinder 11.

[0050] After the unlocking process is initiated, the hydraulic oil in the fluid chamber 7.6 pushes the piston rod 10 toward the second unlocking component of the load 13. The second end of the piston rod 10 releases its support from the split nut 9, and the outer periphery of the split nut 9 disengages from the piston cylinder 11 and the adapter nut 12. At this time, the first and second unlocking components of the load 13 are in a separable state. The hydraulic oil in the fluid chamber 7.6 continues to push the piston rod 10, and the second end of the piston rod 10 presses against the adapter nut 12, thereby applying a force to the pressure plate 14, pushing the second unlocking component away from the first unlocking component. When the piston rod 10 moves to the step inside the piston cylinder 11, the piston rod 10 stops moving forward, and the second unlocking component continues to move forward under inertia, completely disengaging from the first unlocking component.

[0051] The following is combined with Figures 1 to 9This paper comprehensively explains the unlocking working principle of the multi-point synchronous push-impact connection device. The actuating air source 1.1 generates high-pressure gas, driving the first piston 2 and the second piston 3. When the second piston 3 moves, the volume of the high-pressure oil chamber 4.3 decreases, and the oil enters the interior of the second piston 3 through the damping hole 3.2. This process generates damping force to reduce the excess thrust of the actuating air source 1.1, producing a damping effect. The second piston 3 drives the multi-point synchronous transmission device 5 to move, which synchronously transmits the motion to the three hydraulic output devices. The three third pistons 6 move synchronously, and the volume of the liquid chamber 7.4 decreases. Because liquid chambers 7.4, 7.5, and 7.6 are completely connected, the volume of liquid chamber 7.6 increases, acting on the pusher. The resulting pressure pushes the piston rod 10 to move. After moving a certain distance, the piston rod 10 no longer supports the split nut 9. The piston rod 10 continues to move under pressure, while the split nut 9, under the action of radial force (generated by the installation pre-tightening torque), radially contracts a certain distance (thread height), completing the unlocking process. Based on this, the unlocked split nut 9 is captured on the piston rod 10 by the capture device. At the same time, the piston rod 10 converts the pressure generated by the liquid chamber 7.6 into a thrust that acts on the adapter nut 12. Since the adapter nut 12 is pressed on the pressure plate 14 and the pressure plate 14 is bolted to the load 13, the force of the piston rod 10 acts directly on the load 13. When the piston rod 10 moves into position, there is no space for its axial movement, and it can no longer output thrust. At this time, the two separation parts have completed unlocking and separation and have a certain relative separation speed, and its thrusting function is completed.

[0052] After the device finishes working, only part of the hydraulic fire-operating device is in direct contact with the high-pressure gas and combustion products. After the work is finished, the first cylinder 1 and the first piston 2 are removed, and the device is restored to its initial state in reverse. The device can be reused after replacing the first cylinder 1, the first piston 2 and the actuating gas source 1.1.

[0053] In summary, this invention provides a reusable, multi-point synchronous thrust connection device with controllable variable load thrust. Through the interaction of a hydraulic actuator, a multi-point synchronous transmission device, and a hydraulic output device, it achieves integrated connection, unlocking, and thrusting functions. Simultaneously, this device realizes controllable variable load thrust, reusable components, and multi-point synchronous unlocking and thrusting capabilities.

[0054] Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make possible changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope defined in the claims of the present invention.

Claims

1. A reusable multi-point synchronous thrust connection device with controllable variable load thrust, characterized in that, include: The hydraulic fire-starting device includes a multi-point synchronous transmission device (5), multiple hydraulic output devices, and a pusher. The hydraulic fire-starting device is connected between the actuating air source and the multi-point synchronous transmission device (5). The multi-point synchronous transmission device (5) is equipped with multiple transmission interfaces, which are connected one-to-one with multiple hydraulic output devices. Each hydraulic output device is connected to a pusher, which is used to unlock the first unlocking component and the second unlocking component of the load (13).

2. The reusable multi-point synchronous thrust connection device according to claim 1, characterized in that, The hydraulic fire-starting device includes a first cylinder (1), a first piston (2), a second piston (3), and a second cylinder (4); The first cylinder (1) has an actuation air source inlet (1.1) at its first end and a cavity (1.3) in its first cylinder (1). The first piston (2) is disposed in the cavity (1.3). The second end of the first cylinder (1) is threadedly connected to the second cylinder (4). After the actuation air source is introduced, the actuation air source enters the cavity (1.3) through the actuation air source inlet (1.1) and pushes the first piston (2) to move toward the second cylinder (4). The second cylinder (4) has a high-pressure oil chamber (4.3); the second piston (3) is installed in the high-pressure oil chamber (4.3) of the second cylinder (4); in addition, the side of the second cylinder (4) facing the first cylinder (1) has a first cylinder opening, through which the first piston (2) passes to abut against the second piston (3); The second cylinder (4) has a second cylinder opening on the side opposite to the first cylinder (1), and the second piston (3) passes through the opening and connects to the multi-point synchronous transmission device (5) behind it. The second piston (3) has a low-pressure oil chamber (3.4) and a damping hole (3.2) is provided on the side wall of the second piston (3). The damping hole (3.2) connects the high-pressure oil chamber (4.3) and the low-pressure oil chamber (3.4). The high-pressure oil chamber (4.3) is filled with oil.

3. The reusable multi-point synchronous thrust connection device according to claim 2, characterized in that, In the initial state, the low-pressure oil chamber (3.4) is not filled with oil, and the oil in the high-pressure oil chamber (4.3) cannot directly enter the low-pressure oil chamber (3.4) due to the restriction of the damping orifice (3.2); When the first piston (2) moves toward the second cylinder (4) under the push of the actuating air source, the second piston (3) is pushed by the first piston (2) and moves in the high-pressure oil chamber (4.3) of the second cylinder (4). On the one hand, it squeezes the liquid oil in the high-pressure oil chamber (4.3), and the liquid oil in the high-pressure oil chamber (4.3) enters the low-pressure oil chamber (3.4) through the damping hole (3.2). On the other hand, it pushes the multi-point synchronous transmission device (5) to move away from the hydraulic fire working device.

4. The reusable multi-point synchronous thrust connection device according to claim 2, characterized in that, The first piston (2) is sealed within the cavity (1.3) by a sealing ring (2.1) with the inner wall of the first cylinder (1); the side wall of the second piston (3) is sealed against the inner wall of the second cylinder (4) by a sealing ring (3.1) to ensure a complete seal within the cavity (4.3); a sealing ring (4.1) is provided on the inner wall of the second cylinder (4) at the opening of the second cylinder, and the sealing ring (4.1) is sealed against the outer wall of the second piston (3) to ensure a complete seal within the high-pressure oil chamber (4.3).

5. The reusable multi-point synchronous thrust connection device according to claim 1, characterized in that, The hydraulic output device includes a third piston (6), a connector (7), and a third cylinder (8); the first end of the third piston (6) is connected to a transmission interface of a multi-point synchronous transmission device (5); the third cylinder (8) is connected between the third piston (6) and the connector (7); a liquid cavity (7.4) is formed inside the third cylinder (8); the first end of the third cylinder (8) has a third cylinder opening, through which the third piston (6) passes and is movable within the liquid cavity (7.4); The adapter (7) includes a first adapter end, a second adapter end, and an adapter pipe connecting the first adapter end and the second adapter end; The first adapter is used to connect to the second end of the third cylinder (8) and to seal the liquid cavity (7.4); The cavity formed at the center of the second adapter is a liquid cavity (7.6); The center of the adapter pipe has a liquid cavity (7.5), which is connected between the liquid cavities (7.4) and (7.6); the adapter (7) is connected to the pusher behind it through the second adapter end.

6. The reusable multi-point synchronous thrust connection device according to claim 5, characterized in that, The multi-point synchronous transmission device (5) transmits the driving force from the hydraulic fire working device to the third piston (6) of the hydraulic output device, and then the third piston (6) squeezes the liquid oil in the liquid chamber (7.4); the liquid oil in the liquid chamber (7.4) enters the liquid chamber (7.6) through the liquid chamber (7.5), and the liquid chamber (7.6) is the actuation source of the subsequent pusher.

7. The reusable multi-point synchronous thrust connection device according to claim 5, characterized in that, The outer wall of the third piston (6) is tightly attached to the inner wall of the third cylinder (8) through the sealing ring (6.2) to ensure that the liquid chamber (7.4) is completely sealed; the oil diameter of the liquid chamber (7.5) is smaller than the oil diameter of the liquid chamber (7.4), and the oil diameter of the liquid chamber (7.5) is smaller than the oil diameter of the liquid chamber (7.6).

8. The reusable multi-point synchronous thrust connection device according to claim 5, characterized in that, The pusher includes a split nut (9), a piston rod (10), a piston cylinder (11), a transition nut (12), and a pressure plate (14); The first and second unlocking components of the load (13) both have through holes at the unlocking positions, and the two through holes are arranged opposite to each other and are connected. The first unlocking component is provided with a piston cylinder (11). The first end of the piston cylinder (11) is connected to the adapter (7). The second end of the piston cylinder (11) is fixedly connected to the through hole at the unlocking position of the first unlocking component by an external circumferential thread. The second unlocking component is provided with an adapter nut (12) and a pressure plate (14). The first end of the adapter nut (12) is fixedly connected to the through hole at the unlocking position of the second unlocking component by an external circumferential thread. The opening at the first end of the adapter nut (12) is arranged opposite to and connected to the opening at the second end of the piston cylinder (11) and is used to accommodate the split nut (9). In the initial state before unlocking, the split nut (9) connects the piston cylinder (11) and the adapter nut (12) together by an external circumferential thread. The second end of the adapter nut (12) presses against the pressure plate (14). The adapter nut (12) is used to transmit the unlocking driving force to the pressure plate (14). The piston rod (10) is disposed in the piston cylinder (11). The first end of the piston rod (10) is used to bear the thrust of the liquid chamber (7.6), so that the piston rod (10) moves in the piston cylinder (11) under the push of the liquid oil in the liquid chamber (7.6). The second end of the piston rod (10) is engaged in the split nut (9) in the initial state before unlocking, so as to ensure that the outer periphery of the split nut (9) is in cooperation with the inner wall of the piston cylinder (11) and the adapter nut (12). The piston cylinder (11) also has a step to limit the stroke of the piston rod (10) to prevent the piston rod (10) from coming out of the piston cylinder (11).

9. The reusable multi-point synchronous thrust connection device according to claim 8, characterized in that, After the unlocking is initiated, the hydraulic oil in the fluid chamber (7.6) pushes the piston rod (10) toward the second unlocking component of the load (13). The second end of the piston rod (10) releases its support from the split nut (9), and the outer periphery of the split nut (9) disengages from the piston cylinder (11) and the adapter nut (12). Then, the hydraulic oil in the fluid chamber (7.6) continues to push the piston rod (10), and the second end of the piston rod (10) presses against the adapter nut (12), thereby applying force to the pressure plate (14) and pushing the second unlocking component away from the first unlocking component. When the piston rod (10) moves to the step inside the piston cylinder (11), the piston rod (10) stops moving forward, and the second unlocking component continues to move forward under inertia, completely disengaging from the first unlocking component.

10. The reusable multi-point synchronous thrust connection device according to claim 1, characterized in that, The number of hydraulic output devices is greater than or equal to three.

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