Exhaust device for product sealing assembly

Abstract

An exhaust device for product sealing assembly comprises an elastic floating mechanism, a positioning mechanism, a pressing mechanism and an exhaust mechanism. The floating mechanism and the pressing mechanism are oppositely arranged in a spaced mode and can do linear displacement relative to the positioning mechanism. An exhaust mechanism is fixedly arranged on the floating mechanism; in the initial state and the assembling process, the positioning mechanism supports and positions the first workpiece with the sealing elastic piece, and the floating mechanism supports and positions the second workpiece. Before assembly, the exhaust mechanism is inserted into the second workpiece cavity; the pressing mechanism is used for driving the second workpiece and the floating mechanism to move, and after assembling is completed, under the elastic force effect of the floating mechanism, the exhaust mechanism is separated from the sealing contact face of the assembled first workpiece and second workpiece. By means of the device, automatic exhaust is achieved in the assembling process, and the assembling efficiency and the assembling quality are improved.

Description

Technical Field

[0001] This invention relates to the field of mechanical assembly, and specifically to an exhaust device for sealing and assembling products. Background Technology

[0002] An activated fuse, used for circuit protection, typically consists of a housing, a piston housed within the housing, and an electronic ignition device. A conductive busbar runs through the housing and can be connected in series with the main circuit for circuit protection. The electronic ignition device receives a trigger signal, releases high-pressure gas, and drives the piston to move. The piston's kinetic energy cuts off the conductive busbar, disconnecting the main circuit and achieving circuit protection. To ensure sufficient kinetic energy for the piston, a sealed cavity must be maintained between the electronic ignition device and the piston, allowing the high-pressure gas to have sufficient pressure to drive the piston's displacement. Currently, the structure used is as follows: the high-pressure gas release end of the electronic ignition device and the piston are located together in the cavity of the housing. The electronic ignition device is sealed and fixed to the housing. Because the piston needs to move, an O-ring is provided on its outer circumference. The O-ring seal on the piston achieves a seal between the piston and the cavity of the housing. Driven by the high-pressure gas from the electronic ignition device, the piston carries the O-ring and moves along the cavity of the housing.

[0003] The current assembly method is as follows: First, the electronic ignition device is sealed and fixedly installed on one end of the cavity inside the housing, sealing one end of the cavity. Then, the piston, fitted with a sealing ring, is assembled into the cavity from the other end of the housing. Since the sealing ring on the piston maintains a sealed contact with the cavity throughout the assembly process, a sealed cavity is formed between the piston and the electronic ignition device. As the piston moves towards the electronic ignition device, the volume of the sealed cavity gradually decreases, while the air within the sealed cavity gradually compresses, increasing the air pressure within the sealed cavity until the piston assembly is complete, at which point the sealed cavity volume is at its minimum and the air pressure is at its maximum. After the piston assembly is complete, the compressed air within the sealed cavity exerts a force on the piston. In some cases, this force can drive the piston away from the electronic ignition device, causing it to disengage from its assembly position, leading to assembly failure and a reduced assembly yield. When this defect occurs during user-side use, it may cause a change in the initial position of the piston. As a result, when the piston needs to cut off the conductive busbar in an abnormal situation, the increased volume of the sealed cavity between the piston and the electronic ignition device may prevent the piston from obtaining sufficient kinetic energy to cut off the conductive busbar. Consequently, the main circuit may not be able to disconnect through the excitation fuse, causing the circuit protection to fail and potentially resulting in significant losses. Summary of the Invention

[0004] The purpose of this invention is to provide an exhaust device for sealed product assembly. During the assembly process of the first and second workpieces, an exhaust mechanism is used to discharge the compressed air between the closed ends of the first and second workpieces to the outside of the second workpiece. After assembly, the air pressure inside and outside the first workpiece is made consistent, thereby improving the yield rate of product assembly and improving the reliability of product operation.

[0005] To achieve the above objectives, the technical solution of the present invention is an exhaust device for sealing and assembling a product, comprising an elastic floating mechanism, a positioning mechanism, a pressing mechanism, and an exhaust mechanism; the floating mechanism and the pressing mechanism are arranged relatively spaced apart, and the floating mechanism and the pressing mechanism can respectively perform linear displacement relative to the positioning mechanism; the exhaust mechanism is fixedly mounted on the floating mechanism; in the initial state and during assembly, the positioning mechanism supports and positions a first workpiece with a sealing elastic element, and the floating mechanism supports and positions a second workpiece; before assembly, the exhaust mechanism is inserted into the cavity of the second workpiece and is positioned against the inner wall of the cavity of the second workpiece; during assembly, the pressing mechanism... The second workpiece is driven to move toward the first workpiece, assembling the first workpiece into the second workpiece. Simultaneously, the floating mechanism is driven to move relative to the positioning mechanism along with the venting mechanism during the assembly process. When a preset displacement is reached, the clamping mechanism returns to its original position. Under the elastic force of the floating mechanism, the floating mechanism first moves synchronously with the assembled first and second workpieces, causing the assembled first and second workpieces to disengage from the positioning mechanism. Then, the floating mechanism moves relative to the venting mechanism along with the assembled first and second workpieces, causing the venting mechanism to disengage from the sealing contact surfaces of the assembled first and second workpieces, thus completing the assembly.

[0006] Preferably, it further includes a limiting mechanism, which is used to limit the displacement distance of the floating mechanism when the clamping mechanism drives the floating mechanism to move.

[0007] Preferably, the floating mechanism includes a first elastic mechanism and a second elastic mechanism capable of synchronous and relative displacement; the first elastic mechanism is spaced apart from the pressing mechanism, and the second elastic mechanism is disposed between the first elastic mechanism and the pressing mechanism, with one end of the second elastic mechanism facing the pressing mechanism located between the first elastic mechanism and the pressing mechanism; the venting mechanism is fixedly disposed on the first elastic mechanism and protrudes beyond the first and second elastic mechanisms at one end facing the pressing mechanism, and the first and second elastic mechanisms are movable relative to the positioning mechanism; the limiting mechanism restricts the displacement distance of the first elastic mechanism; before assembly, the first workpiece is placed on the positioning mechanism, the second workpiece is placed on the second elastic mechanism, and the free end of the venting mechanism is positioned to fit against the inner wall of the second workpiece. The second workpiece is located in the cavity of the second workpiece and outside the assembly surface between the second workpiece and the first workpiece. During assembly, the clamping mechanism drives the second workpiece to move towards the first workpiece by contacting the second elastic mechanism. This causes the first and second elastic mechanisms to move relative to each other and then move synchronously. This causes the exhaust mechanism to move relative to the second workpiece first, so that the free end of the exhaust mechanism penetrates into the interior of the second workpiece and passes over the assembly surface between the first and second workpieces. Then, it moves synchronously, so that the first workpiece is assembled into the second workpiece from the open end of the second workpiece. After the first and second workpieces are assembled, the clamping mechanism is reset. The first and second elastic mechanisms move synchronously and then relative to each other, so that the assembled first and second workpieces are disengaged from the positioning mechanism. Then, the exhaust mechanism is disengaged from the contact surface between the second and first workpieces.

[0008] Preferably, the first elastic mechanism includes a floating plate passing through a guide post, the floating plate being connected to a first spring sleeved on the guide post; the second elastic mechanism includes a guide pin passing through the floating plate, a second spring being sleeved on the outer periphery of the guide pin on the side of the floating plate facing the pressing mechanism, one end of the second spring being disposed on the floating plate, and a limiting step being provided on the guide pin on the side of the floating plate away from the second spring to form the limiting mechanism, the limiting step limiting the displacement distance of the floating plate; the positioning mechanism is disposed in the floating plate; and the venting mechanism is disposed on the floating plate on the side of the positioning mechanism.

[0009] Preferably, the floating plate has a U-shaped groove, the positioning mechanism is located in the U-shaped groove of the floating plate, and the exhaust mechanism is fixedly installed on one side wall of the U-shaped groove.

[0010] Preferably, the second workpiece has a positioning hole through which a guide pin passes. The positioning hole is located on the outside of the cavity of the second workpiece. During assembly, the end of the guide pin located on the side of the floating plate facing the pressing mechanism passes through the positioning hole of the second workpiece, and the end of the second spring abuts against the end face of the second workpiece facing the first workpiece to support the second workpiece.

[0011] Preferably, the positioning mechanism is a positioning rod, and a groove is provided at one end of the positioning rod facing the pressing mechanism, and the first workpiece is placed in the groove.

[0012] Preferably, the exhaust mechanism is an exhaust plate. When the exhaust plate is located between the cavity of the second workpiece and the sealing elastic element of the first workpiece, the end of the exhaust plate located inside the second workpiece is located in the cavity between the end of the sealing elastic element of the first workpiece facing the inside of the second workpiece and the end of the cavity of the second workpiece away from the opening end of the second workpiece.

[0013] Preferably, the exhaust plate has an arc-shaped structure in the width direction, and during assembly, both sides of the exhaust plate are tightly fitted to the inner wall of the second workpiece and the sealing elastic element.

[0014] Preferably, an exhaust groove is provided on the side of the exhaust plate that contacts the inner wall of the cavity of the second workpiece.

[0015] Preferably, the clamping mechanism includes a cylinder, a connecting plate is provided on the first workpiece rod of the cylinder, and a pressure head is provided on the connecting plate at a position opposite to the positioning mechanism; the cylinder moves the pressure head relative to the positioning mechanism.

[0016] The exhaust device for sealing and assembling products according to the present invention uses an exhaust mechanism set between the first and second workpieces during the assembly process. After the assembly is completed, the exhaust mechanism is automatically withdrawn to achieve exhaust during assembly. The assembly method is simple, the assembly quality is high, and the assembly efficiency and yield rate are improved. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the present invention.

[0018] Figure 2 yes Figure 1 A schematic diagram of the internal structure after removing the outer shell.

[0019] Figure 3 This is a schematic diagram of the floating mechanism.

[0020] Figure 4 This is a schematic diagram of the positioning rod structure.

[0021] Figure 5This is a schematic diagram of a floating plate structure.

[0022] Figure 6 yes Figure 2 Based on this, a structural diagram showing the placement of the first workpiece is provided.

[0023] Figure 7 yes Figure 6 A schematic diagram of a structure on which a second workpiece is placed.

[0024] Figure label:

[0025] First workpiece B, second workpiece A, outer shell 10, base plate 101, guide post 201, floating plate 202, first spring 203, oil-free bushing 204, U-shaped groove 205, through hole 206, through hole 207, guide pin 208, second spring 209, exhaust plate 210, installation position 211, positioning rod 212, installation groove 213, cylinder 214, connecting plate 215, pressure head 216. Detailed Implementation

[0026] The venting device for sealing assembly of the product of the present invention includes an elastic floating mechanism, a positioning mechanism, a pressing mechanism, and a venting mechanism. The floating mechanism and the pressing mechanism are arranged at intervals relative to each other, and the floating mechanism and the pressing mechanism can respectively make linear displacements relative to the positioning mechanism. The venting mechanism is fixedly arranged on the floating mechanism. In the initial state and during the assembly process, the positioning mechanism supports and positions the first workpiece with a sealing elastic element, and the floating mechanism supports and positions the second workpiece. Before assembly, the venting mechanism is inserted into the cavity of the second workpiece and is arranged against the inner wall of the cavity of the second workpiece. During assembly, the pressing mechanism drives the second workpiece to move towards the direction of the first workpiece, assembling the first workpiece into the second workpiece. At the same time, the floating mechanism drives the venting mechanism to move relative to the positioning mechanism during the assembly process. When the preset displacement amount is reached, the pressing mechanism returns to its original position. Under the elastic force of the floating mechanism, the floating mechanism first moves the venting mechanism synchronously with the assembled first and second workpieces, so that the assembled first and second workpieces are separated from the positioning mechanism. Then, the floating mechanism moves the assembled first and second workpieces relative to the venting mechanism, so that the venting mechanism is separated from the sealing contact surface of the assembled first and second workpieces, and the assembly is completed.

[0027] The following describes preferred embodiments in detail with reference to the accompanying drawings. The directional terms used are for reference only and do not constitute a limitation on the technical solution of this invention.

[0028] The second workpiece A is a shell-like structure with a cavity, open at one end and closed at the other. The first workpiece B has a sealing elastic element on its outer periphery. The first workpiece B is assembled into the second workpiece A from the open end of the second workpiece A through an exhaust device. After the first workpiece B and the second workpiece A are assembled, the sealing elastic element of the first workpiece B is located in the cavity of the second workpiece A, which is used to seal the contact surface of the first workpiece and the second workpiece.

[0029] The exhaust device of the sealed assembly of the product of the present invention is shown in the figure. Figures 1 to 7 The system includes a base plate 101, on which a housing 10 is mounted. The housing 10 has an opening on one side. The base plate 101 serves as a mounting base, and a floating mechanism, a positioning mechanism, and a clamping mechanism are mounted on it. The clamping mechanism is located within the housing 10, while the floating mechanism and the positioning mechanism are located on the opening side of the housing 10. An exhaust mechanism is mounted on the floating mechanism.

[0030] Floating mechanism, see Figure 3 and Figure 5 It includes a first elastic mechanism and a second elastic mechanism.

[0031] The first elastic mechanism includes guide posts 201, a floating plate 202, a first spring 203, and an oil-free bushing 204. Two guide posts 201 are vertically arranged at intervals on the base plate 101. The floating plate 202 has an inverted concave structure, with a U-shaped groove 205 at the center of one side. Through holes 206 for the guide posts 201 to pass through are formed on opposite sides of the U-shaped groove 205 in the floating plate 202. Through holes 207 for the second elastic mechanism to pass through are also formed in the floating plate 202; these through holes 207 are countersunk holes. Through holes 206 and 207 are located on the outer sides of the U-shaped groove 205.

[0032] A guide post 201 is fixedly mounted on the base plate 101. The guide post 201 passes through a through hole 206 on the floating plate 202, allowing the floating plate 202 to be fitted onto the guide post 201. A first spring 203 is fitted around the outer periphery of the guide post 201 between the floating plate 202 and the base plate 101. An oil-free bushing 204 is fixedly mounted at the end of the guide post 201 away from the base plate 101. The oil-free bushing 204 restricts the floating plate 202 and the first spring 203, allowing the first spring 203 to be in a normal or compressed state, and causing the floating plate 202 to move linearly on the guide post 201 between the oil-free bushing 204 and the base plate 101. When the floating plate 202 moves toward the base plate 101 under the drive of the clamping mechanism, the first spring 203 is compressed. When the floating plate is not driven by the clamping mechanism, the floating plate 202 moves toward the end of the oil-free bushing 204 under the elastic force of the first spring 203, and its position is limited by the oil-free bushing 204. The U-shaped groove 205 is located between the two guide posts 201.

[0033] The second elastic mechanism includes a guide pin 208 and a second spring 209. One end of the guide pin 208 is fixedly mounted on the base plate 101, and the other end passes through a through hole 207 on the floating plate 202 and is located on the other side of the floating plate 202. The second spring 209 is sleeved on the outer periphery of the free end of the guide pin 208. One end of the second spring 209 abuts and is engaged in the through hole 207, and the other end of the second spring 209 is the free end. The free end of the guide pin 208 is located outside the free end of the second spring 209. A limiting step is provided on the outer periphery of the guide pin 208 between the floating plate 202 and the base plate 101 to form a limiting mechanism. When the floating plate 202 moves linearly toward the base plate 101, the limiting step on the guide pin 208 limits the displacement of the floating plate 202.

[0034] A guide hole is provided on the second workpiece A of the excitation fuse for the free end of the guide pin 208 to pass through. When the second workpiece A is placed on the second elastic mechanism, the free end of the guide pin 208 passes through the guide hole of the second workpiece A, and the free end of the second spring 209 abuts against the end face of the second workpiece A facing the base plate 101, forming a support limit for the second workpiece A, so that the cavity of the second workpiece A where the first workpiece is installed is directly opposite the U-shaped groove 205 of the floating plate 202.

[0035] In this embodiment, the exhaust mechanism is an exhaust plate 210. The exhaust plate 210 is made of a material with both rigidity and toughness, such as stainless steel or manganese steel, with manganese steel being preferred. The exhaust plate 201 is fixedly installed at the mounting position 211 on one side of the U-shaped groove 205 of the floating plate 202, and the exhaust plate 210 protrudes from the floating plate 202. The exhaust plate 210 is generally fitted against the inner wall of the second workpiece. The exhaust plate 210 is designed as a narrow and long structure with a small width, and both sides of the exhaust plate 210 in the width direction are designed with arc-shaped structures. During assembly, it can be tightly fitted against the inner wall of the second workpiece and the sealing elastic element. Due to the certain thickness of the exhaust plate, the gas inside the second workpiece can be discharged from both sides of the exhaust plate.

[0036] In some embodiments, an exhaust groove extending through the length of the exhaust plate can be provided along the length of the exhaust plate, so that even if the exhaust plate is narrow and tightly fitted to the inner wall of the second workpiece, the gas inside the second workpiece can be discharged along the exhaust groove.

[0037] The positioning mechanism is positioned directly opposite the U-shaped groove of the floating plate 202. In this embodiment, see... Figure 4The positioning mechanism is a positioning rod 212. One end of the positioning rod 212 is fixedly installed on the base plate 101, and the other end is a free end, facing the U-shaped groove 205 of the floating plate 202. A mounting groove 213 is provided at the free end of the positioning rod for installing the first workpiece B. When the first workpiece B is installed, its impact end is engaged in the mounting groove 213, thus positioning the first workpiece B. An O-ring sealing elastic element is fitted onto the outer circumference of the first workpiece B, with one end facing the floating plate 202. The sealing elastic element can achieve elastic deformation during compression and rebound in the exhaust process. It can be a sealing ring structure, made of rubber, or a sealing ring formed by a rubber composite spring structure, etc., preferably made of rubber.

[0038] The clamping mechanism includes a cylinder 214, a connecting plate 215, and a pressure head 216. In this embodiment, the cylinder 214 is a three-axis cylinder, located on one side of the floating plate 202 opposite to the U-shaped groove 205. The first workpiece rod of the cylinder 214 is vertically oriented, and the connecting plate 215 is fixedly provided at the end of the first workpiece rod of the cylinder 214. The pressure head 216 is fixedly provided on the side of the connecting plate 215 facing the floating plate 202, and the pressure head 216 is positioned directly opposite the positioning rod 212.

[0039] During assembly, the first workpiece B is fixedly mounted on the mounting groove 213 of the positioning rod 212. Then, the second workpiece A is placed on the second elastic mechanism, so that the free end of the guide pin 208 passes through the guide hole of the second workpiece A. The second spring 209 of the second elastic mechanism supports the second workpiece A. At this time, the free end of the exhaust plate 210 protruding from the floating plate 201 is located in the cavity of the second workpiece A and fits against the inner wall of the cavity of the second workpiece A. The end face of the free end of the exhaust plate 210 is located at a certain distance from the side of the assembly position of the first workpiece and the cavity of the second workpiece facing the base plate 101.

[0040] Then, the cylinder 214 moves, causing the pressure head 216 to move towards the base plate 101. During the movement, the pressure head 216 drives the second workpiece A to move along the guide pin 208 towards the first workpiece B, causing the second workpiece A to contact the second spring 209 and compress the second spring 209. The first workpiece B enters the cavity of the second workpiece A, so that the exhaust plate 210 is located between the inner wall of the cavity of the first workpiece B and the second workpiece A. A gap is maintained between the exhaust plate 210 and the inner wall of the cavity of the second workpiece A, and the free end of the exhaust plate 210 is located in the sealed cavity between the sealing elastic element on the first workpiece B and the closed end of the second workpiece A. As the pressure head moves further, the second spring 209 is compressed to a certain extent. Driven by the pressure head, it moves synchronously toward the base plate 101 along with the floating plate 202 until the floating plate 202 stops moving at the limit step of the guide pin 208, and the first spring 203 is compressed. During this process, as the second workpiece A moves toward the first workpiece B, the free ends of the first workpiece B and the exhaust plate move toward the closed end of the second workpiece A in the cavity of the second workpiece A. When the first workpiece B reaches the assembly position, it stops. When the assembly is finished, the free end of the exhaust plate is always located in the sealed cavity between the closed end of the second workpiece A and the sealing elastic element of the first workpiece B. As the volume of the sealed cavity shrinks, the compressed air in the sealed cavity is discharged to the outside of the second workpiece through the gap between the exhaust plate and the cavity of the second workpiece A, so that the air pressure inside and outside the first workpiece remains consistent. After the first and second workpieces are assembled, the cylinder 214, along with the pressure head 216, resets. During the reset process, firstly, under the elastic force of the first spring 203, the floating plate 202, along with the exhaust plate 210, resets, simultaneously displacing the assembled second workpiece A and the first workpiece B from the mounting groove of the positioning rod and moving synchronously towards the pressure head, thus disengaging the assembled first and second workpieces from the mounting groove of the positioning rod. Once the floating plate 202, along with the exhaust plate 210, has reset, it no longer moves. Then, under the elastic force of the second spring 209, the second spring 209 drives the assembled second workpiece A and the first workpiece B to move back to the initial position of the second workpiece A during assembly, causing the free end of the exhaust plate 210 to disengage from the sealing contact surface between the first workpiece B and the second workpiece A. The assembly work is then complete, and the assembled second workpiece A and the first workpiece B can then be removed.

[0041] In other embodiments, the second workpiece A can be fixed, the exhaust mechanism can be fixed and pre-extended into the cavity of the second workpiece, and the first workpiece equipped with a sealing elastic element can be installed on the floating mechanism below the second workpiece. The first workpiece moves upward with the floating mechanism to realize the assembly and exhaust of the two workpieces. After the assembly is completed, the assembled second workpiece and the first workpiece are removed so that the exhaust mechanism is detached from the second workpiece and the first workpiece.

[0042] Alternatively, the first workpiece equipped with a sealing elastic element is fixed above, and the second workpiece is installed on a floating mechanism below the first workpiece. The exhaust mechanism is also installed on the floating mechanism and is pre-extended into the cavity of the second workpiece. The second workpiece and the exhaust mechanism move upward with the floating mechanism to realize the assembly and exhaust of the two workpieces.

[0043] Alternatively, the second workpiece is fixed to the floating plate of the first elastic mechanism below, the exhaust mechanism is fixed and pre-extended into the cavity of the second workpiece, and the first workpiece equipped with a sealing elastic element is installed on the floating mechanism above the second workpiece. The first workpiece moves down with the floating mechanism to realize the assembly and evacuation of the two workpieces.

[0044] The common feature of the above solutions is that the exhaust mechanism is pre-inserted into the cavity of the second workpiece before assembly. During the assembly process, the second workpiece and the exhaust mechanism are in a relatively stationary state, while the second workpiece and the first workpiece are in a relatively moving state.

[0045] The venting device for the sealed assembly of the product of this invention can be applied to the assembly of the piston and housing of an excitation fuse, wherein the piston is the first workpiece and the excitation fuse housing is the second workpiece. Compared with conventional assembly methods, it enables simultaneous venting while ensuring a sealed condition during assembly, resulting in a better assembly effect and higher reliability after venting. During assembly, the shape of the venting plate is designed to fit as closely as possible to the inner wall of the excitation fuse housing. When assembling the excitation fuse housing and piston, the venting plate can fit tightly against the inner wall of the excitation fuse housing. In this case, a venting groove is provided along the length of the venting plate to allow gas to escape from the venting groove. The narrower the width of the venting plate (along the circumference of the housing), the better. Furthermore, when the inner wall of the housing is curved, the venting plate can also be configured with an arc-shaped structure corresponding to the curvature of the inner wall of the housing.

Claims

1. A venting device for a sealed assembly of a product, characterized in that, The assembly includes a flexible floating mechanism, a positioning mechanism, a clamping mechanism, and a venting mechanism. The floating mechanism and the clamping mechanism are spaced apart from each other, and both can perform linear displacement relative to the positioning mechanism. The venting mechanism is fixedly mounted on the floating mechanism. In the initial state and during assembly, the positioning mechanism supports and positions a first workpiece with a sealing elastic element, and the floating mechanism supports and positions a second workpiece. Before assembly, the venting mechanism is inserted into the cavity of the second workpiece and positioned against the inner wall of the cavity. During assembly, the clamping mechanism drives the second workpiece toward the direction of the first workpiece. The first workpiece is displaced into the second workpiece, and the floating mechanism is driven to move relative to the positioning mechanism along with the venting mechanism during the assembly process. When the preset displacement is reached, the clamping mechanism returns to its original position. Under the elastic force of the floating mechanism, the floating mechanism first moves synchronously with the assembled first and second workpieces, causing the assembled first and second workpieces to disengage from the positioning mechanism. Then, the floating mechanism moves relative to the venting mechanism along with the assembled first and second workpieces, causing the venting mechanism to disengage from the sealing contact surface between the assembled first and second workpieces, thus completing the assembly.

2. The exhaust device according to claim 1, characterized in that, It also includes a limiting mechanism, which limits the displacement distance of the floating mechanism when the clamping mechanism drives the floating mechanism to move.

3. The exhaust device according to claim 2, characterized in that, The floating mechanism includes a first elastic mechanism and a second elastic mechanism capable of synchronous and relative displacement; the first elastic mechanism is spaced apart from the pressing mechanism, and the second elastic mechanism is disposed between the first elastic mechanism and the pressing mechanism, with one end of the second elastic mechanism facing the pressing mechanism located between the first elastic mechanism and the pressing mechanism; the venting mechanism is fixedly disposed on the first elastic mechanism and protrudes from the first elastic mechanism and the second elastic mechanism at one end facing the pressing mechanism, and the first elastic mechanism and the second elastic mechanism are capable of displacement relative to the positioning mechanism; the limiting mechanism restricts the displacement distance of the first elastic mechanism; before assembly, the first workpiece is placed on the positioning mechanism, the second workpiece is placed on the second elastic mechanism, and the free end of the venting mechanism is positioned such that it fits against the inner wall of the second workpiece. The second workpiece is located in the cavity of the first workpiece and outside the assembly surface between the second workpiece and the first workpiece. During assembly, the clamping mechanism drives the second workpiece to move towards the first workpiece by contacting the second elastic mechanism. This causes the first and second elastic mechanisms to move relative to each other and then move synchronously. This causes the exhaust mechanism to move relative to the second workpiece first, so that the free end of the exhaust mechanism penetrates into the interior of the second workpiece and passes over the assembly surface between the first and second workpieces. Then, it moves synchronously, so that the first workpiece is assembled into the second workpiece from the open end of the second workpiece. After the first and second workpieces are assembled, the clamping mechanism is reset. The first and second elastic mechanisms move synchronously and then relative to each other, so that the assembled first and second workpieces are disengaged from the positioning mechanism. Then, the exhaust mechanism is disengaged from the contact surface between the second and first workpieces.

4. The exhaust device according to claim 3, characterized in that, The first elastic mechanism includes a floating plate passing through a guide post, the floating plate being connected to a first spring sleeved on the guide post; the second elastic mechanism includes a guide pin passing through the floating plate, a second spring being sleeved on the outer periphery of the guide pin on the side of the floating plate facing the pressing mechanism, one end of the second spring being disposed on the floating plate, and a limiting step being provided on the guide pin on the side of the floating plate away from the second spring to form the limiting mechanism, the limiting step limiting the displacement distance of the floating plate; the positioning mechanism is disposed in the floating plate; the venting mechanism is disposed on the floating plate on the side of the positioning mechanism.

5. The exhaust device according to claim 4, characterized in that, The floating plate has a U-shaped groove, the positioning mechanism is located in the U-shaped groove of the floating plate, and the exhaust mechanism is fixedly installed on one side wall of the U-shaped groove.

6. The exhaust device according to claim 4, characterized in that, The second workpiece has a positioning hole through which a guide pin passes. The positioning hole is located on the outside of the cavity of the second workpiece. When assembled, the end of the guide pin located on the side of the floating plate facing the clamping mechanism passes through the positioning hole of the second workpiece. The end of the second spring abuts against the end face of the second workpiece facing the first workpiece to support the second workpiece.

7. The exhaust device according to claim 1, characterized in that, The positioning mechanism is a positioning rod, and a groove is provided at one end of the positioning rod facing the pressing mechanism, and the first workpiece is placed in the groove.

8. The exhaust device according to claim 1, characterized in that, The exhaust mechanism is an exhaust plate. When the exhaust plate is located between the cavity of the second workpiece and the sealing elastic element of the first workpiece, the end of the exhaust plate located inside the second workpiece is located in the cavity between the end of the sealing elastic element of the first workpiece facing the inside of the second workpiece and the end of the cavity of the second workpiece away from the opening end of the second workpiece.

9. The exhaust device according to claim 8, characterized in that, The exhaust plate has an arc-shaped structure in the width direction. During assembly, both sides of the exhaust plate are tightly fitted to the inner wall of the second workpiece and the sealing elastic element.

10. The exhaust device according to claim 8, characterized in that, An exhaust groove is provided on the side of the exhaust plate that contacts the inner wall of the cavity of the second workpiece.

11. The exhaust device according to any one of claims 1 to 10, characterized in that, The clamping mechanism includes a cylinder, a connecting plate is provided on the first workpiece rod of the cylinder, and a pressure head is provided on the connecting plate at a position opposite to the positioning mechanism; the cylinder moves the pressure head relative to the positioning mechanism.

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