Liquid filling tool for automobile parts

Abstract

The liquid filling tool for the automobile parts comprises a liquid filling device body, a sealing device communicated with an external vacuumizing device and the liquid filling device is arranged on the liquid filling device body, the sealing device comprises a lower sealing ring, an upper sealing ring and a liquid inlet sealing ring which are connected in a sealing mode, and the liquid inlet sealing ring is located between the upper sealing ring and the lower sealing ring. A liquid filling sealing cavity is further formed in the sealing device. The liquid inlet and outlet device is communicated with the sealing device and can play roles in vacuum, liquid inlet, pressure relief, residual liquid removal and the like. The liquid filling tool for the automobile parts is free of residual liquid, high in sealing performance, accurate in liquid use and simple in liquid filling process.

Description

Technical Field

[0001] The utility model relates to the technical field of liquid filling, and more specifically to a liquid filling tool for automobile parts. Background Art

[0002] During the manufacturing process of the hydraulic bushing, it is necessary to fill the inside of the hydraulic bushing with liquid so that the inside of the hydraulic bushing is filled with liquid. During the filling process, the existing technology, such as a pre-installed hydraulic bushing dry filling device and method shown in patent CN116331563A, has problems such as residual liquid in the airbag, inaccurate liquid dosage, and complicated filling process. Utility Model Content

[0003] The utility model overcomes the problems of residual liquid in the airbag, inaccurate overall liquid usage and complicated liquid filling process, and invents a liquid filling tool for automobile parts with no residual liquid, strong sealing, accurate liquid usage and simple liquid filling process.

[0004] A liquid filling tool for automobile parts, including a liquid filling device body, on which a sealing device is provided for connecting an external vacuum pump and a liquid filling device, characterized in that the sealing device comprises a sealing lower ring and a sealing upper ring which are sealed, a liquid inlet sealing ring is provided inside the sealing lower ring; and a liquid filling sealing cavity is provided inside the sealing device. It is only necessary to put the workpiece into the sealing device, and a liquid filling sealing cavity is formed between the workpiece and the sealing device, and liquid flows in and out from the channel connecting the sealing device and the liquid inlet and outlet device; the sealing upper ring, the liquid inlet sealing ring, and the sealing lower ring in the sealing device are tightly connected, and there is no gap between them, so as to form a sealed environment with the workpiece placed therein.

[0005] Preferably, a stepped groove is provided inside the lower sealing ring, and the liquid inlet sealing ring is provided in the stepped groove and forms an annular cavity with the stepped groove; a plurality of through holes are provided on the side wall of the liquid inlet sealing ring, and the through holes communicate the liquid filling sealing cavity and the annular cavity. The liquid filling sealing cavity is connected to the annular cavity through the through holes on the liquid inlet sealing ring, and the liquid can be poured from the annular cavity into the interior of the workpiece to complete the liquid filling; the through holes on the liquid inlet sealing ring are evenly distributed, and the liquid can be poured from multiple angles, thereby improving the liquid filling efficiency.

[0006] Preferably, the bottom surface of the sealing lower ring is provided with a sealing ring which forms a seal with the end surface of the housing. The sealing ring plays a sealing role, so that the liquid can be retained inside the workpiece without leakage, and a sealed environment is formed inside the workpiece.

[0007] Preferably, the sealing lower ring is arranged on a tooling bottom plate through a set of sliding columns, and the sealing lower ring is driven by a set of lifting cylinders to move up and down along the sliding columns. The sealing lower ring is provided with a plurality of holes, which are used to install the sliding columns. The setting of the sliding columns can more conveniently clamp and remove the workpiece, and the lifting cylinder controls the movement of the sealing lower ring in the vertical direction.

[0008] Preferably, a bearing plate is provided on the tooling bottom plate below the sealing lower ring, and a product shell mounting groove is provided on the bearing plate. The position where the matching sealing ring is provided on the bottom surface of the sealing lower ring is also the position where the workpiece shell is placed, and it plays a sealing role together with the shell mounting groove on the bearing plate to prevent liquid from leaking during the bushing filling process, forming a sealed environment; the sealing lower ring and the bearing plate play a role in clamping the workpiece shell, eliminating the need for a separate clamping device component, and simplifying the filling process.

[0009] Preferably, a lower pre-pressing cylinder is provided between the bearing plate and the tooling bottom plate. A pre-pressing head can be installed on the bearing plate to clamp the workpiece together with the pre-pressing head installed on the upper output shaft; the lower pre-pressing cylinder controls the movement of the bearing plate in the vertical direction.

[0010] Preferably, the sealing device is provided with a liquid inlet and outlet device; the liquid inlet and outlet device is provided with a liquid inlet and outlet pipeline controlled by a liquid inlet valve, and the liquid inlet and outlet pipeline is connected with the liquid filling sealing chamber. The liquid inlet and outlet device is connected with the sealing device, and a liquid inlet valve is provided on the liquid inlet and outlet pipeline to control the liquid flowing into the liquid filling sealing chamber, which is directly connected with the sealing device to avoid waste caused by leakage.

[0011] Preferably, a pressure relief chamber is provided inside the sealing device, and the liquid inlet and outlet device is provided with a pressure relief pipeline connected to the pressure relief chamber; the pressure relief pipeline is controlled by a pressure relief valve; the pressure relief pipeline is located above the liquid inlet and outlet pipeline. The liquid inlet and outlet device can also relieve pressure, and the remaining liquid can be discharged after pressure relief, saving the amount of liquid for filling; the pressure relief pipeline is located above the liquid inlet and outlet pipeline, and is separated from the liquid inlet and outlet pipeline. During pressure relief, air can enter from the top of the sealing device, and play a role in promoting the liquid inlet and outlet pipeline below the sealing device. The pressure difference between the upper and lower parts facilitates the outflow of the remaining liquid.

[0012] As a preferred embodiment, the liquid inlet and outlet device is also provided with a residual liquid valve and a vacuum valve, which respectively control the residual liquid port and the vacuum port; the residual liquid port and the vacuum port are respectively connected to the liquid filling sealing chamber. The liquid inlet and outlet pipelines in the sealing device are shared pipelines, and the liquid inlet and outlet device is divided into three pipelines, namely, the liquid inlet and outlet pipelines, the vacuum pipelines, and the residual liquid pipelines, each of which is controlled by the liquid inlet valve, the vacuum valve, and the residual liquid valve to control the liquid in and out of the pipeline to complete its own function.

[0013] Preferably, the sealing device is connected to the liquid inlet and outlet pipelines and the pressure relief pipeline in the corresponding liquid inlet and outlet device through the sealing lower ring and the liquid inlet sealing ring, so that the liquid can flow in these two devices to complete the liquid filling step; the pressure relief pipeline is arranged above the liquid inlet and outlet pipeline, so that during the pressure relief process, the gas can drive the liquid to flow out from the liquid inlet and outlet pipeline below, thereby reducing the residual liquid inside the sealing device and accurately ensuring the amount of liquid used.

[0014] Preferably, the liquid inlet and outlet pipelines and the pressure relief pipeline in the liquid inlet and outlet device are controlled by a liquid inlet valve and a pressure relief valve respectively, and the liquid inlet and outlet pipelines flow into the liquid from the liquid filling port. The liquid inlet valve and the pressure relief valve respectively control the inlet and outlet of the liquid in their respective pipelines.

[0015] Preferably, the outer diameter and inner diameter of the upper sealing ring are the same as those of the lower sealing ring; a stepped groove is provided inside the lower sealing ring, and the liquid inlet sealing ring is provided on the stepped groove; a plurality of through holes are provided on the side wall of the liquid inlet sealing ring. The inner surfaces of the lower sealing ring, the liquid inlet sealing ring and the upper sealing ring are located in the same plane. The outer diameter and inner diameter of the upper sealing ring are equal to those of the lower sealing ring, and the liquid inlet sealing ring is embedded in the upper sealing ring and the lower sealing ring, and the liquid inlet sealing ring is provided on the stepped groove provided in the lower sealing ring; each sealing structure together forms a sealing device, which plays a role of sealing during the liquid filling process; the inner surfaces of the lower sealing ring, the liquid inlet sealing ring and the upper sealing ring are located in the same plane and there is no gap at the connection, and the fit is tight, so that liquid can be prevented from flowing out after being filled.

[0016] Preferably, a guide ring is provided on the sealing upper ring; the size of the guide ring is adapted to the output shaft;

[0017] A pre-pressing head is provided under the output shaft. The function of the pre-pressing head is to control the filling amount. According to the amount of filling required by the workpiece, the downward pressure of the pre-pressing head is adjusted to apply pressure to the workpiece to complete the filling operation of the workpiece.

[0018] Preferably, the sealing upper ring and the sealing lower ring are connected and fixed by a plurality of screws, the liquid inlet sealing ring is embedded between the sealing upper ring and the sealing lower ring, and the guide ring is connected and fixed to the sealing upper ring by a plurality of screws.

[0019] Preferably, the inner surfaces of the sealing upper ring, the liquid inlet sealing ring and the sealing lower ring in the clamping device are highly smooth. The high smoothness can not only reduce the resistance to the liquid during the filling process, but also prevent the workpiece from encountering resistance during the downward movement for filling, affecting the speed of downward movement, and reducing the force of the output shaft; the inner surfaces of the sealing upper ring, the liquid inlet sealing ring and the sealing lower ring are located in the same plane without any gap between them, thereby ensuring the sealing performance of the sealing device.

[0020] The beneficial effects of the utility model are as follows: the sealing device is connected with the liquid inlet and outlet device, and the pressure relief pipe is connected with the liquid inlet and outlet pipes; the sealing device is composed of a sealing upper ring, a liquid inlet sealing ring, and a sealing lower ring, and the sealing lower ring and the supporting plate clamp the outer shell of the workpiece; the above structure enables the utility model to have the advantages of no residual liquid, strong sealing, accurate liquid usage, and simple liquid filling process for automobile parts filling tooling. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a front view of the utility model.

[0022] Figure 2 It is a cross-sectional view of the utility model at AA.

[0023] Figure 3 This is a schematic diagram of the utility model for inserting the main spring and the housing.

[0024] Figure 4 It is a schematic diagram of the vacuum filling of the utility model.

[0025] Figure 5 It is a schematic diagram of the utility model after press-fitting is completed.

[0026] Figure 6 It is a schematic diagram of a partial structure explosion of the utility model.

[0027] Figure 7 For the utility model and Figure 6 Reverse view of .

[0028] In the figure: 1. output shaft; 2. pre-pressure head; 3. pressure relief valve; 4. pressure relief pipeline; 5. sliding column; 6. liquid filling port; 7. liquid inlet valve; 8. bearing plate; 9. lifting cylinder; 10. lower pre-pressure cylinder; 11. guide ring; 12. sealing upper ring; 13. liquid inlet sealing ring; 14. sealing lower ring; 15. sealing ring; 16. residual liquid port; 17. vacuum port; 18. residual liquid valve; 19. vacuum valve; 20. tooling bottom plate; 21. main spring; 22. outer shell; 23. liquid inlet and outlet pipelines; 24. sealing device; 25. liquid inlet and outlet device; 26. liquid filling sealing chamber; 27. ring chamber; 28. pressure relief chamber. DETAILED DESCRIPTION

[0029] Embodiment 1:

[0030] As the instruction manual Figure 1-7As shown in the figure, a filling tool for automobile parts includes a filling device body, a sealing device connecting external vacuum pumping and the filling device is arranged on the filling device body, and the sealing device 24 includes a sealing lower ring 14 and a sealing upper ring 12 which are sealed and connected, a liquid inlet sealing ring 13 is arranged inside the sealing lower ring, and a sealing upper ring is arranged on the liquid inlet sealing ring; a filling sealing cavity 26 is arranged inside the sealing device. A stepped groove is arranged inside the sealing lower ring, and the liquid inlet sealing ring is arranged in the stepped groove and forms an annular cavity 27 with the stepped groove; a plurality of through holes are arranged on the side wall of the liquid inlet sealing ring, and the through holes connect the filling sealing cavity and the annular cavity. A sealing ring 15 is arranged on the bottom surface of the sealing lower ring to form a seal with the end surface of the shell 22. The sealing lower ring is arranged on a tooling bottom plate 20 through a group of sliding columns 5, and the sealing lower ring is driven to move up and down along the sliding columns by a group of lifting cylinders 9. A bearing plate 8 is arranged on the tooling bottom plate 20 below the sealing lower ring, and a shell mounting groove is arranged on the bearing plate. A lower pre-compression cylinder 10 is provided between the carrier plate and the tooling bottom plate. A liquid inlet and outlet device 25 is provided on the sealing device; a liquid inlet and outlet pipeline 23 controlled by a liquid inlet valve 7 is provided in the liquid inlet and outlet device, and the liquid inlet and outlet pipeline is connected to the liquid filling sealing chamber.

[0031] A pressure relief chamber 28 is also provided inside the sealing device, and a pressure relief pipeline 4 connected to the pressure relief chamber is also provided in the liquid inlet and outlet device; the pressure relief pipeline is controlled by a pressure relief valve 3; the pressure relief pipeline is located above the liquid inlet and outlet pipelines.

[0032] The liquid inlet and outlet device is also provided with a residual liquid valve 18 and a vacuum valve 19, which respectively control the residual liquid port 16 and the vacuum port 17; the residual liquid port and the vacuum port are respectively connected to the liquid filling sealing cavity. A guide ring 11 is provided above the sealing upper ring; an output shaft 1 is provided above the sealing device body; and a pre-pressure head 2 is provided below the output shaft.

[0033] The main spring 21 of the bushing is placed in the guide ring 11, and the outer shell 22 of the bushing is placed on the bearing platform 8. The lifting cylinder 9 drives the sealing lower ring 14 to descend, so that the sealing lower ring and the bearing platform clamp the outer shell of the bushing, and the upper end surface of the outer shell forms a sealing structure with the customized sealing ring 15 to ensure that there is no leakage during vacuum filling; then the output shaft 1 drives the pre-pressing head 2 to move downward, and the main spring is pressed downward. During the downward pressing process, it passes through the sealing upper ring 12, the liquid inlet sealing ring 13, and the sealing lower ring 14 to reach the position of vacuum filling; when vacuuming, the vacuum valve 18 is opened, and the main spring of the product is pressed downward. The spring draws out the air in the internal cavity of the main spring through the vacuum port 17, and then after the vacuum process is completed, the vacuum valve is closed, the liquid inlet valve 7 is opened, and the liquid flows through the liquid filling port 6 through the liquid inlet and outlet pipelines 23 to complete the liquid filling process of the product. After the filling is completed, the liquid inlet valve is closed, and the pressure relief valve 3 is opened at this time, and the excess liquid in the bushing is discharged through the pressure relief pipeline 4; the output shaft continues to move downward, so that when the main spring of the bushing is pressed into the filling completion position, the residual liquid valve 18 is opened, and the excess liquid inside the workpiece is drawn out through the residual liquid port 16, the tooling is reset, and the bushing that has been filled with liquid is taken out to complete the bushing filling operation.

[0034] The output shaft 1 controls the pre-load head 2, which adapts to the size of the bushing main spring 21 and presses the main spring downward; the amount of liquid required between the main spring and the bushing shell 22 determines the size of the vertical downward force of the pre-load head driven by the output shaft; the diameter of the output shaft is smaller than the inner diameter of the sealing device, larger than the distance between the pre-load heads, and the same as the outer diameter of the upper surface of the main spring; the pre-load head is embedded in the output shaft.

[0035] The sealing device 24 comprises a sealing lower ring 14, wherein an adapted liquid inlet sealing ring 13 is arranged inside the sealing lower ring, and an upper sealing ring 12 is arranged on the sealing lower ring and the liquid inlet sealing ring, and together they constitute a sealing device; a stepped groove is arranged inside the sealing lower ring, and the liquid inlet sealing ring is arranged in the stepped groove and forms an annular cavity 27 with the stepped groove; a plurality of through holes are arranged on the side wall of the liquid inlet sealing ring, and the through holes connect the liquid filling sealing cavity 26 and the annular cavity. The inner surfaces of the sealing upper ring, the liquid inlet sealing ring and the sealing lower ring are located in the same plane; the sealing upper ring and the sealing lower ring are fixedly connected by bolts, and the liquid inlet sealing ring is fixed between the sealing upper ring and the sealing lower ring, and is placed on the stepped groove of the sealing lower ring; the outer diameter and inner diameter of the sealing upper ring and the sealing lower ring are the same; the sealing upper ring, the liquid inlet sealing ring and the sealing lower ring together form a sealing structure; the main spring is placed on the guide ring, and the guide ring is connected to the sealing device by four screws; in the sealing device, the sealing upper ring and the sealing lower ring are connected by eight screws The positions of the above-mentioned screws are evenly distributed on the device, so that the sealing lower ring and the sealing upper ring are evenly stressed, thereby ensuring the sealing performance of the sealing device, reducing cracks and damage to the device caused by uneven stress, and extending the service life of the device; 12 through holes are arranged on the side wall of the liquid inlet sealing ring, and the through holes allow liquid to flow in; the 12 through holes on the liquid inlet sealing ring are evenly distributed on the liquid inlet sealing ring, and multiple through holes ensure the efficiency of liquid filling, and liquid can enter the ring cavity from the liquid filling sealing cavity through multiple through holes.

[0036] The upper sealing ring 12 is in the shape of a circular ring, with a circular groove on the upper surface, the size of which is the size of the outer diameter of the guide ring; the lower sealing ring 14 is a rectangular parallelepiped as a whole, with a circular groove in the middle, the size of which is adapted to the liquid inlet sealing ring 13, the shape of the liquid inlet sealing ring is a circular ring, and the height of the groove in the lower sealing ring is consistent with the height of the liquid inlet sealing ring; the inner diameters of the upper sealing ring, the liquid inlet sealing ring and the lower sealing ring are the same, that is, the inner surfaces are located on the same plane, and the inner diameter is slightly larger than the diameter of the main spring 21 of the bushing; the inner surface is smooth, and the smooth inner surface can reduce the friction force received by the liquid flowing through, and the liquid flowing through will not slow down due to the excessive roughness of the inner surface, thereby affecting the efficiency of liquid filling; the surface of the joint between the upper sealing ring, the liquid inlet sealing ring and the lower sealing ring is smooth, and the smooth contact surface makes the sealing device 24 have good sealing performance, avoiding the occurrence of gaps due to the rough contact surface, which affects the sealing performance of the sealing device.

[0037] The liquid inlet and outlet pipelines 23 and the pressure relief pipeline 4 are arranged on the liquid inlet and outlet sealing ring 13 and the lower sealing ring 14. The liquid inlet and outlet pipelines and the pressure relief pipelines are respectively connected to the pipelines in the liquid inlet and outlet device 25; the liquid inlet and outlet pipelines in the liquid inlet and outlet device are divided into three, and the switches of the pipelines are respectively controlled by the vacuum valve 19, the liquid inlet valve 7, and the residual liquid valve 18; the liquid flowing into the pipeline can enter the main spring 21 and the shell 22 through the 12 through holes in the liquid inlet sealing ring to complete the filling operation. The pressure relief pipeline is separated from the liquid inlet and outlet pipelines, and the pressure relief pipeline is located above the liquid inlet and outlet pipelines. During the pressure relief process, air can enter from the top, so that the liquid can flow out from the liquid inlet and outlet pipelines below, and residual liquid in the pipeline is avoided, so that the device uses an accurate amount of liquid to avoid waste.

[0038] The bottom surface of the sealing lower ring 14 is provided with a sealing ring that forms a seal with the end surface of the outer shell. The position of the sealing ring 15 corresponds to the position of the circular groove of the bearing plate 8, and they clamp the outer shell 22 of the bushing together to play a clamping role; wherein, the material of the sealing ring can be rubber material, and the rubber sealing ring has good elasticity and wear resistance, and a sealing ring with excellent oil resistance, solvent resistance and wear resistance such as fluororubber, acrylic rubber, etc. is selected; the sealing ring seals the liquid filled in the outer shell of the bushing; a metal sealing ring made of stainless steel or copper can be used, which has high pressure resistance and corrosion resistance.

[0039] The sealing device 24 adopts static sealing, and the sealing structures are combined into one by means of sealing rings 15, bolts and other devices to ensure that there are no gaps between the components. The sealing upper ring 12 and the sealing lower ring 14 are connected by bolts, and the liquid inlet sealing ring 13 is embedded in the middle to ensure that there are no gaps between the two in the device.

[0040] A bearing plate 8 is arranged directly below the sealing lower ring 14. The outer shell 22 of the processed bushing is placed between the sealing lower ring and the bearing plate, which plays a role of clamping and fixing; a circular groove with the same size as the outer shell of the processed bushing is arranged on the bearing plate, and a customized sealing ring 15 is arranged at the junction of the lower bottom surface of the sealing lower ring and the outer shell of the bushing, which plays a role of sealing during the filling process; the clamping device is composed of the sealing ring and the bearing plate, which saves the clamping mechanism, simplifies the structure of the filling mechanism, and the processing of the bearing plate is simple, which reduces the production cost.

[0041] The sealing lower ring 14 is arranged on a tooling bottom plate 20 through a set of sliding columns 5. The sealing lower ring is driven to move up and down along the sliding columns by a set of lifting cylinders. Four through holes are arranged at the corners of the sealing lower ring for the movement of the sliding columns. In the same vertical direction, a semicircular groove is also arranged on the bearing plate 8 directly below the sealing lower ring for limiting and fixing the position of the sliding columns. The lower ends of the sliding columns are fixed by the tooling bottom plate, and the upper ends are fixed by strip-shaped fixing pieces for fixing the sliding columns in pairs.

[0042] The lower sealing ring 14 is controlled to move in the vertical direction by the lifting cylinder 9, and the lower sealing ring slides in the vertical direction on the sliding column 5; the sealing device 24 is controlled to move downward by the lifting cylinder, so that the sealing device and the bearing plate 8 can play the role of clamping the bushing shell 22. A lower pre-pressing cylinder 10 is arranged between the bearing plate and the tooling bottom plate 20. The pre-pressing head 2 can be installed on the bearing plate, and the pre-pressing head installed on the upper output shaft 1 can clamp the workpiece together; the lower pre-pressing cylinder controls the movement of the bearing plate in the vertical direction.

[0043] A liquid inlet and outlet device 25 is provided on the sealing device 24; a liquid inlet and outlet pipeline 23 controlled by a liquid inlet valve 7 is provided in the liquid inlet and outlet device, and the liquid inlet and outlet pipeline is connected to the liquid filling sealing chamber 26. A pressure relief chamber 28 is also provided inside the sealing device, and the liquid inlet and outlet device is also provided with a pressure relief pipeline connected to the pressure relief chamber; the pressure relief pipeline is controlled by a pressure relief valve 3; the pressure relief pipeline 4 is located above the liquid inlet and outlet pipeline. The liquid inlet and outlet device is also provided with a residual liquid valve 18 and a vacuum valve 19, and the residual liquid valve and the vacuum valve respectively control the residual liquid port 16 and the vacuum port 17; the residual liquid port and the vacuum port are respectively connected to the liquid filling sealing chamber. The liquid inlet and outlet pipelines in the sealing device are shared pipelines, and the liquid inlet and outlet device is divided into three pipelines, namely, the liquid inlet and outlet pipeline, the vacuum pipeline, and the residual liquid pipeline, each of which is controlled by the liquid inlet valve, the vacuum valve, and the residual liquid valve to control the liquid in and out of the pipeline to complete their respective functions. The inlet and outlet liquid devices can also play a role in pressure relief. After the pressure relief, the remaining liquid can be discharged, saving the amount of liquid for filling. The pressure relief pipeline is located above the inlet and outlet liquid pipelines and is separated from the inlet and outlet liquid pipelines. During pressure relief, air can enter from the top of the sealing device and promote the inlet and outlet liquid pipelines below the sealing device. The pressure difference between the upper and lower parts facilitates the outflow of the remaining liquid.

[0044] The size of the tooling bottom plate 20 is larger than that of the cylinder, and plays a bearing role. The larger the area of ​​the tooling bottom plate, the larger the force-bearing area, and the stronger the stability of the device.

[0045] Embodiment 2:

[0046] As the instruction manual Figure 1-7As shown in the figure, a liquid filling tool for automobile parts is used. The main spring 21 of the bushing is placed in the guide ring 11, and the outer shell 22 of the bushing is placed on the bearing platform 8. The lifting cylinder 9 drives the sealing lower ring 14 to descend, so that the sealing lower ring and the bearing platform clamp the outer shell of the bushing. The upper end surface of the outer shell and the customized sealing ring 15 form a sealing structure to ensure that the vacuum filling does not leak. Then the output shaft 1 drives the pre-pressing head 2 to move downward to press the main spring downward. A pre-pressing head is arranged on the bearing plate. The pre-pressing head is controlled by the lower pre-pressing cylinder 10 arranged between the bearing plate and the tooling bottom plate to control the movement in the vertical direction, so that the main spring is pressed downward. In the process of pressing downward, the sealing upper ring 12 and the liquid-inlet sealing ring 15 are used to press the main spring downward. The sealing ring 13 and the sealing lower ring 14 reach the position of vacuuming and filling; when vacuuming, the vacuum valve 19 is opened, and the main spring of the product draws out the air in the internal cavity of the main spring through the vacuum port 17. After the vacuum process is completed, the vacuum valve is closed, the liquid inlet valve 7 is opened, and the liquid flows through the liquid filling port 6 through the liquid inlet and outlet pipelines 23 to complete the liquid filling process of the product. After the filling is completed, the liquid inlet valve is closed, and the pressure relief valve is opened at this time, and the excess liquid in the bushing is discharged through the pressure relief pipeline 4; the output shaft continues to move downward, so that when the main spring of the bushing is pressed to the filling completion position, the residual liquid valve 18 is opened, and the excess liquid inside the workpiece is pumped out through the residual liquid port 16, the tooling is reset, and the bushing that has been filled with liquid is taken out to complete the bushing filling operation.

[0047] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A filling tool for automobile parts, comprising a filling device body, on which a sealing device for connecting an external vacuum pump and the filling device is arranged, characterized in that: The sealing device (24) comprises a sealing lower ring (14) and a sealing upper ring (12) which are sealed and connected, and a liquid inlet sealing ring (13) is arranged inside the sealing lower ring; A liquid-filled sealing cavity (26) is provided inside the sealing device.

2. The liquid filling tool for automobile parts according to claim 1, characterized in that: A stepped groove is provided inside the lower sealing ring (14), and the liquid inlet sealing ring (13) is arranged in the stepped groove and forms an annular cavity (27) with the stepped groove; A plurality of through holes are arranged on the side wall of the liquid inlet sealing ring, and the through holes communicate with the liquid filling sealing cavity (26) and the ring cavity.

3. The liquid filling tool for automobile parts according to claim 2, characterized in that: The bottom surface of the sealing lower ring (14) is provided with a sealing ring (15) which forms a seal with the end surface of the housing (22).

4. The liquid filling tool for automobile parts according to claim 1, characterized in that: The sealing lower ring (14) is arranged on a tooling bottom plate (20) via a set of sliding columns (5), and the sealing lower ring is driven by a set of lifting cylinders (9) to move up and down along the sliding columns.

5. The liquid filling tool for automobile parts according to claim 4, characterized in that: A bearing plate (8) is provided on the tooling bottom plate (20) below the sealing lower ring (14), and a housing mounting groove is provided on the bearing plate.

6. The liquid filling tool for automobile parts according to claim 5, characterized in that: A lower pre-compression cylinder (10) is provided between the bearing plate (8) and the tooling bottom plate (20).

7. The liquid filling tool for automobile parts according to any one of claims 1 to 6, characterized in that: A liquid inlet and outlet device (25) is provided on the sealing device (24); a liquid inlet and outlet pipeline (23) controlled by a liquid inlet valve (7) is provided in the liquid inlet and outlet device, and the liquid inlet and outlet pipeline is communicated with the liquid filling sealing chamber (26).

8. The liquid filling tool for automobile parts according to claim 7, characterized in that: The sealing device (24) is further provided with a pressure relief chamber (28) inside, and the liquid inlet and outlet device (25) is further provided with a pressure relief pipeline (4) connected to the pressure relief chamber; the pressure relief pipeline is controlled by a pressure relief valve (3); The pressure relief pipeline is located above the inlet and outlet liquid pipelines (23).

9. The liquid filling tool for automobile parts according to claim 7, characterized in that: The liquid inlet and outlet device (25) is further provided with a residual liquid valve (18) and a vacuum valve (19), the residual liquid valve and the vacuum valve respectively controlling the residual liquid port (16) and the vacuum port (17); the residual liquid port and the vacuum port are respectively connected to the liquid filling sealing chamber.

10. The liquid filling tool for automobile parts according to any one of claims 1 to 6, characterized in that: A guide ring (11) is arranged above the sealing upper ring (12); An output shaft (1) is arranged above the sealing device (24); A pre-pressing head (2) is provided at the lower end of the output shaft.

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