A press-fitting tool for automobile buffer internal parts and a press-fitting method thereof

Abstract

The invention discloses a press-fitting tool and a press-fitting method for built-in parts of an automobile buffer, belonging to the technical field of manufacturing built-in parts of an automobile buffer, comprising an operating table, wherein the inner and outer sides of a horizontal part of the operating table are jointly provided with a detection component, the detection component comprising a press-fitting cylinder fixedly connected to the telescopic end of a hydraulic cylinder, and the supporting plate provided in the invention can be retracted into a movable groove after the press-fitting cylinder is lifted from bottom to top, and can be pushed out again after the piston is discharged, since each batch of pistons and sealing rings will quickly enter the inside of a detection chamber for pre-detection after assembly, omission of pistons and sealing rings can be effectively avoided, and at the same time, when the next group of pistons and sealing rings are press-fitted, sufficient detection time can be provided for the pistons and sealing rings that have been press-fitted, so as to prevent the detection of the pistons and sealing rings from being affected by different batches of pistons and sealing rings, thereby ensuring the pre-detection efficiency of the pistons and sealing rings.

Description

Technical Field

[0001] The invention relates to the technical field of manufacturing built-in parts of automobile buffers, and more specifically to a press-fitting tool and a press-fitting method for built-in parts of automobile buffers. Background Art

[0002] The built-in parts of automobile buffers usually refer to various parts and components installed inside the automobile buffers. These built-in parts work together with the buffer shell, springs and other parts to achieve the functions of buffering and shock absorption. Their main function is to absorb and disperse the impact and vibration from the road surface during the driving of the car, thereby protecting the vehicle from damage and improving driving comfort.

[0003] The process of installing the sealing ring on the piston needs to ensure that the sealing ring can be correctly and tightly installed on the piston to provide a good sealing effect. During assembly, the sealing ring needs to be checked to ensure that the sealing ring is not damaged, deformed or aged, and the size matches the piston and cylinder. Then, use appropriate cleaning agents and tools to thoroughly clean the installation surfaces of the piston and cylinder to remove oil, dust and impurities. During formal assembly, the sealing ring needs to be assembled through an expansion mechanism to ensure that the sealing ring is smoothly placed in the groove of the piston. Therefore, the sealing ring is very likely to tear or deform after expansion;

[0004] In the prior art, since rubber sealing rings will become stiff due to freezing in cold weather, the sealing rings assembled subsequently are very likely to tear or deform. In order to ensure the quality of products, they will be inspected with the help of testing equipment. However, generally, a unified inspection will be carried out after all the pistons in the same batch are assembled. However, pistons with more obvious cracks will also be collected among the normal pistons. Long-term visual inspection will lead to omissions due to visual fatigue. If they are not removed in time, the workload of instrument inspection will increase, which will ultimately affect the subsequent inspection efficiency of the pistons. Summary of the invention

[0005] In view of the problems existing in the prior art, the purpose of the present invention is to provide a press-fitting tool and a press-fitting method for built-in parts of an automobile buffer, which can ensure that each batch of pistons and sealing rings can quickly enter the detection chamber for pre-inspection after assembly, and provide sufficient inspection time for the pistons and sealing rings that have been press-fitted.

[0006] To solve the above problems, the present invention adopts the following technical solutions.

[0007] A press-fitting tool for automobile buffer internal parts, comprising an operating table and a hydraulic cylinder fixedly connected to the top of the operating table, characterized in that: a detection component is provided on both the inner and outer sides of the horizontal part of the operating table, and the detection component comprises a press-fitting cylinder fixedly connected to the telescopic end of the hydraulic cylinder;

[0008] The outer side of the press-fitting cylinder is fixedly connected with a movable frame in a ring array, and the interior of the movable frame is plugged with a limit strip;

[0009] The inner and outer sides of the horizontal part of the operating table are jointly provided with a retracting part, and the retracting part includes a movable groove arranged in a circular array inside the horizontal part of the lower end of the operating table, and a movable plate is slidably connected inside the movable groove. After the movable frame moves downward, it is sleeved on the outer side of the movable plate. A detection cavity is penetrated on the upper side of the horizontal part of the lower end of the operating table, and the detection cavity is connected with the movable groove. A support plate is slidably connected on the side of the movable groove close to the detection cavity. A latch is inserted in a circular array on the upper side of the horizontal part of the lower end of the operating table, and a second pressure spring is sleeved on the outer side of the latch. After the pressing cylinder moves downward, the latch is pressed, and a limiting groove is arranged on the upper side of the support plate.

[0010] Furthermore, the limit bar penetrates the movable frame from top to bottom, the support plate extends to the inside of the detection cavity, the pin moves downward and is inserted into the limit groove, an inclined surface is provided at the lower part of the side of the movable frame away from the press-fitting cylinder, and an inclined surface is provided at the upper part of the side of the movable plate away from the press-fitting cylinder, and after the inclined surface inside the movable frame slides in contact with the inclined surface on the side of the movable plate, the movable plate moves toward one side of the press-fitting cylinder, and the limit bar moves downward and is squeezed in contact with the side of the movable plate away from the press-fitting cylinder.

[0011] Furthermore, a tension spring is fixedly connected between the side of the movable plate away from the press-fitting cylinder and the movable groove, a first magnetic block is fixedly connected to the side of the movable plate close to the press-fitting cylinder, a first pressure spring is fixedly connected between the side of the support plate away from the detection chamber and the movable groove, a second magnetic block is fixedly connected to the side of the support plate away from the detection chamber, and the first magnetic block and the second magnetic block are magnetically adsorbed.

[0012] Furthermore, an observation component is provided inside the operating table, and the observation component includes a material guide slope arranged on the lower side of the operating table, and the material guide slope is directly below the detection cavity. A transparent window is provided on the front of the vertical part of the operating table.

[0013] Furthermore, the inner and outer sides of the operating table are jointly provided with a soaking component, and the soaking component includes a transparent barrel fixedly connected to the upper side of the inner part of the operating table, the transparent barrel is located directly below the detection cavity, the detection cavity is communicated with the transparent barrel, the transparent window is located directly in front of the detection cavity and the transparent barrel, a water tank is fixedly connected to the left side of the vertical part of the operating table, a sealing cover is inserted on the upper side of the water tank, the material guide slope extends to the right side of the water tank, and the width of the material guide slope is adapted to the diameter of the transparent barrel.

[0014] Furthermore, an expansion component is provided inside the press-fitting cylinder and above the horizontal portion of the lower end of the operating table, the expansion component includes an expansion cylinder fixedly connected to the inside of the press-fitting cylinder, an expansion seat is slidably connected to the inside of the expansion cylinder, and the expansion seat is located above the horizontal portion of the lower end of the operating table, an extension cavity is opened inside the press-fitting cylinder, the expansion cylinder enters the extension cavity after being expanded by the expansion seat, and chamfers are provided on the upper and lower sides of the extension cavity.

[0015] Furthermore, an oil injection assembly is commonly provided inside the expansion cylinder and inside and outside the expansion seat, and the oil injection assembly includes a fixing cylinder fixedly connected to the upper side of the inside of the expansion cylinder.

[0016] Furthermore, a third pressure spring is fixedly connected to the upper inner side of the fixed cylinder, and the other end of the third pressure spring is fixedly connected to an extrusion rod, and the extrusion rod is slidably connected in the fixed cylinder. After the extrusion rod moves downward, it is inserted into the interior of the expansion seat. The upper inner side of the expansion seat is provided with movable grooves in a ring array, and the movable grooves are in an "L" shape. A pressure rod is slidably connected to the inner side of the horizontal part of the movable groove. After the extrusion rod moves downward, it is extruded and contacted with the inclined surface of the pressure rod. The end of the pressure rod away from the extrusion rod is fixedly connected to a piston member, and the piston member is away from the pressure rod. A fourth pressure spring is fixedly connected between one end of the expansion seat and the movable groove, an annular groove is opened inside the expansion seat at the upper end of the movable groove, a second cover plate is fixedly connected to the upper side of the expansion seat, the second cover plate is located on the upper side of the annular groove, a support ring is slidably connected to the inside of the annular groove, the annular groove is connected to the movable groove, an annular array of oil outlet holes is opened on the outer side of the expansion seat, the oil outlet holes are connected to the annular groove, a delivery pipe is fixedly connected to the upper side of the expansion seat, and the delivery pipe is connected to the annular groove, and the other end of the delivery pipe is connected to an external oil supply device.

[0017] Furthermore, the interior of the press-fitting cylinder and the interior of the expansion seat are jointly provided with an insulation component, and the insulation component includes an installation cavity opened in the press-fitting cylinder, a first cover plate is fixedly connected to the lower side of the press-fitting cylinder, a connecting groove is opened in the interior of the first cover plate, and the installation cavity is connected to the interior of the press-fitting cylinder through the connecting groove, a heating wire is fixedly connected to the interior of the installation cavity, and a pressure sensor is fixedly connected to the lower side of the inner part of the annular groove, the upper side of the pressure sensor is in extrusion contact with the lower side of the support plate, and the pressure sensor, the heating wire and the operating table are all electrically connected to an external power supply.

[0018] A press-fitting method for a press-fitting tool for an internal component of an automobile buffer:

[0019] S1: After the hydraulic cylinder pushes the press cylinder downward, the expansion cylinder expands outside the expansion seat and discharges the lubricating oil from the oil outlet hole, while the heating wire keeps the sealing ring warm;

[0020] S2: After the pressing cylinder drives the movable frame to move downward, the pressing cylinder will first press the latch, so that the latch locks the support plate, and the locked support plate will support the piston;

[0021] S3: After the hydraulic cylinder lifts the press cylinder upward, the sealing ring is corrected first, and then the restriction on the support plate is released, so that the support plate is retracted into the moving groove, and the piston falls into the detection cavity. After the inclined surface of the limit bar contacts the inclined surface of the moving plate, the first pressure spring drives the support plate to reset;

[0022] S4: The piston entering the detection chamber will show different descending speeds depending on whether there are cracks on the surface of the sealing ring. After entering the transparent barrel, the piston soaked in clean water can further determine whether there are cracks on the surface of the sealing ring by whether bubbles are generated, and the results can be observed through the transparent window.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] (1) The support plate provided in the present invention can be retracted into the movable groove after the pressing cylinder is lifted from bottom to top, and can be pushed out again after the piston is discharged. Since each batch of pistons and sealing rings will quickly enter the detection chamber for pre-detection after assembly, it can effectively avoid the omission of pistons and sealing rings. At the same time, when the next group of pistons and sealing rings are pressed, sufficient detection time can be provided for the pistons and sealing rings that have been pressed, so as to prevent the detection of pistons and sealing rings from being affected by different batches of pistons and sealing rings, thereby ensuring the pre-detection efficiency of pistons and sealing rings.

[0025] (2) The present invention observes the movement state of the piston inside the detection chamber through the transparent window. Since the piston entering the detection chamber will have different movement speeds depending on whether there are cracks on the surface of the sealing ring, the movement state of the piston and the sealing ring can be intuitively observed through the transparent window, and then whether there are cracks on the surface of the sealing ring can be quickly determined, so as to facilitate the subsequent timely removal of defective products, further improving the pre-detection efficiency of the piston and the sealing ring.

[0026] (3) The transparent barrel provided in the present invention can display the number of bubbles and determine the quality of the piston and the sealing ring. Since the piston entering the transparent barrel will have bubbles of varying degrees and quantities depending on whether there are cracks on the surface of the sealing ring, the bubbles can be observed visually through the transparent window and whether the piston is a defective product can be determined based on the number of bubbles. The pistons arranged in stages inside the water tank can be easily removed quickly, thereby further improving the pre-detection efficiency of the piston and the sealing ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural schematic diagram of the present invention;

[0028] Figure 2It is a schematic diagram of the cross-section structure of the present invention;

[0029] Figure 3 It is a schematic cross-sectional structural diagram of the operating table of the present invention;

[0030] Figure 4 It is a schematic cross-sectional structural diagram of the movable groove of the present invention;

[0031] Figure 5 For the present invention Figure 4 A magnified schematic diagram of point A;

[0032] Figure 6 It is a schematic cross-sectional structural diagram of a support plate of the present invention;

[0033] Figure 7 It is a schematic cross-sectional structural diagram of the press-fitting cylinder of the present invention;

[0034] Figure 8 It is a schematic cross-sectional structural diagram of the expansion tube of the present invention;

[0035] Fig. 9 For the present invention Figure 8 An enlarged schematic diagram of point B;

[0036] Fig.10 It is a schematic diagram of the steps of the movable frame moving upwards according to the present invention.

[0037] Description of the numbers in the figure:

[0038] 1. Operating table; 11. Hydraulic cylinder; 2. Detection component; 21. Pressing cylinder; 211. First cover plate; 22. Movable frame; 221. Limiting strip; 23. Retracting member; 231. Moving groove; 232. Moving plate; 233. Tension spring; 234. First magnetic block; 235. First pressure spring; 236. Support plate; 237. Second magnetic block; 24. Detection chamber; 25. Latch; 26. Second pressure spring; 27. Limiting groove; 28. Observation component; 281. Material guide slope; 282. Transparent window; 29. ​​Soaking component; 291. Transparent barrel; 292. Water storage tank; 293. Sealing cover; 3. Expansion component; 31. Expansion cylinder; 32. Expansion seat; 321. Second cover plate; 33. Extension cavity; 34. Oil filling assembly; 341. Fixing cylinder; 342. Third pressure spring; 343. Extrusion rod; 344. Movable groove; 345. Pressure rod; 346. Piston member; 347. Fourth pressure spring; 348. Support ring; 349. Annular groove; 3491. Oil outlet; 3492. Delivery pipe; 35. Insulation assembly; 351. Installation cavity; 352. Heating wire; 353. Pressure sensor. DETAILED DESCRIPTION

[0039] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making creative work are within the scope of protection of the present invention.

[0040] See also Figures 1 to 10 A press-fitting tool for automobile buffer internal parts, comprising an operating table 1 and a hydraulic cylinder 11 fixedly connected to the top of the operating table 1, characterized in that: a detection component 2 is provided on both the inner and outer sides of the horizontal part of the operating table 1, and the detection component 2 comprises a press-fitting cylinder 21 fixedly connected to the telescopic end of the hydraulic cylinder 11;

[0041] The outer side of the press-fitting cylinder 21 is fixedly connected with a movable frame 22 in a circular array, and the interior of the movable frame 22 is plugged with a limit strip 221;

[0042] The inner and outer sides of the horizontal part of the operating table 1 are jointly provided with a retracting piece 23, and the retracting piece 23 includes a movable groove 231 opened in an annular array inside the lower horizontal part of the operating table 1, and the inside of the movable groove 231 is slidably connected with a movable plate 232. After the movable frame 22 moves downward, it is sleeved on the outer side of the movable plate 232. A detection cavity 24 is opened through the upper side of the lower horizontal part of the operating table 1, and the detection cavity 24 is connected with the movable groove 231. A support plate 236 is slidably connected to the side of the movable groove 231 close to the detection cavity 24. A latch 25 is inserted in an annular array on the upper side of the lower horizontal part of the operating table 1, and a second pressure spring 26 is sleeved on the outer side of the latch 25. After the pressing cylinder 21 moves downward, the latch 25 is pressed, and a limiting groove 27 is provided on the upper side of the support plate 236.

[0043] The limit strip 221 penetrates the movable frame 22 from top to bottom, and the support plate 236 extends to the inside of the detection chamber 24. The latch 25 moves downward and is inserted into the limit groove 27. An inclined surface is provided at the lower part of the side of the movable frame 22 away from the press-fitting cylinder 21, and an inclined surface is provided at the upper part of the side of the movable plate 232 away from the press-fitting cylinder 21. After the inclined surface inside the movable frame 22 slides in contact with the inclined surface on the side of the movable plate 232, the movable plate 232 moves toward one side of the press-fitting cylinder 21, and the limit strip 221 moves downward and is squeezed in contact with the side of the movable plate 232 away from the press-fitting cylinder 21.

[0044] A tension spring 233 is fixedly connected between the side of the movable plate 232 away from the pressing cylinder 21 and the movable groove 231, a first magnetic block 234 is fixedly connected to the side of the movable plate 232 close to the pressing cylinder 21, a first pressure spring 235 is fixedly connected between the side of the support plate 236 away from the detection chamber 24 and the movable groove 231, a second magnetic block 237 is fixedly connected to the side of the support plate 236 away from the detection chamber 24, and the first magnetic block 234 and the second magnetic block 237 are magnetically adsorbed.

[0045] An observation component 28 is provided inside the operating platform 1 .

[0046] The inner and outer sides of the operating table 1 are provided with a soaking assembly 29 .

[0047] An expansion member 3 is provided inside the press cylinder 21 and above the lower horizontal portion of the operating table 1 .

[0048] By adopting the above technical solution, the detection component 2 cooperates with the expansion component 3 to place the piston and the sealing ring. As the hydraulic cylinder 11 above the operating table 1 pushes the pressing cylinder 21 downward, the piston and the sealing ring will gradually be assembled. While the pressing cylinder 21 moves downward, it will also drive multiple movable frames 22 to move downward. Then the movable frame 22 is sleeved on the outer side of the movable plate 232, and after the inclined surface inside the movable frame 22 contacts the inclined surface of the movable plate 232, the movable frame 22 presses the movable plate 232, causing the movable plate 232 to drive the first magnetic block 234 to move toward the direction of the support plate 236. After the movable plate 232 moves, it will also pull the tension spring 233. Before the movable plate 232 moves, the pressing cylinder 21 will first engage with the latch 25. The first magnetic block 234 is attracted to the second magnetic block 237 after the movable plate 232 drives the first magnetic block 234 to approach the movable plate 236. Due to the limitation of the latch 25 of the movable plate 236, the movable plate 236 cannot squeeze the first pressure spring 235. After the sealing ring is docked with the piston, the pressing cylinder 21 will start to move upward and drive the movable frame 22 to move upward. After the inclined surface inside the movable frame 22 is separated from the inclined surface on the side of the movable plate 232, the limiting strip 221 will move downward with its own weight and block the movable plate 232. After moving upward, the moving plate 232 will first contact the side of the limiting strip 221, so that the moving plate 232 pulled by the tension spring 233 cannot be reset in time. At this time, the latch 25 is pushed upward by the second pressure spring 26 and disengages from the limiting groove 27 above the supporting plate 236. At this time, the supporting plate 236 loses the restriction from the latch 25, and the first magnetic block 234 and the second magnetic block 237 are close to each other, so that the first magnetic block 234 adsorbs the second magnetic block 237, causing the supporting plate 236 to be pulled into the moving groove 231. After losing the support of the supporting plate 236, the piston will fall into the interior of the detection chamber 24. As the inclined surface of the limiting strip 221 contacts the inclined surface of the moving plate 232, the inclined surface of the moving plate 232 will squeeze the inclined surface of the limiting strip 221. At this time, the moving plate 23 2 Without the restriction from the limit bar 221, the tension spring 233 will drive the moving plate 232 to quickly reset. At this time, the first magnetic block 234 will be away from the second magnetic block 237. Because the magnetic adsorption force between the two is reduced, the first pressure spring 235 pushes the supporting plate 236, and finally returns to the original position and supports the next batch of pistons. The pistons entering the detection chamber 24 will be timely inspected for the sealing rings after the cooperation of the observation component 28 and the immersion component 29. Since each batch of pistons and sealing rings will quickly enter the detection chamber 24 for pre-inspection after assembly, it can effectively avoid the omission of pistons and sealing rings. At the same time, when the next group of pistons and sealing rings are press-fitted, sufficient inspection time can be provided for the pistons and sealing rings that have been press-fitted.This prevents the detection of pistons and seals from being affected by different batches of pistons and seals, thereby ensuring the efficiency of pre-detection of pistons and seals.

[0049] like Figure 1 and Figure 2 As shown, the observation component 28 includes a material guide slope 281 arranged on the lower side of the operating platform 1. The material guide slope 281 is directly below the detection cavity 24, and a transparent window 282 is arranged on the front of the vertical part of the operating platform 1.

[0050] By adopting the above technical solution, first, after the material enters the detection chamber 24, the clean water placed by the immersion component 29 will isolate the air below the detection chamber 24. When the sealing ring is intact, the piston and the sealing ring can effectively isolate the space above and below the piston, so that the piston will not be affected by the additional pressure or resistance from these spaces when sliding. If a crack appears in the sealing ring, the space above and below the piston is no longer completely isolated. When the piston slides from top to bottom, it will squeeze the air above. This part of the squeezed crack air will leak into the space below the piston through the crack. This leakage will cause the pressure in the space above the piston to decrease, while the pressure in the space below will increase. The pressure difference between the upper and lower spaces will cause the piston to be subjected to an upward force, which will hinder the piston from sliding down, causing the movement speed of the piston to be affected. Since the piston entering the detection chamber 24 will have different movement speeds depending on whether there are cracks on the surface of the sealing ring, the movement state of the piston and the sealing ring can be intuitively observed through the transparent window 282 at this time, and then the presence of cracks on the surface of the sealing ring can be quickly determined, so as to facilitate the subsequent timely removal of defective products, further improving the pre-detection efficiency of the piston and the sealing ring.

[0051] like Figure 2 As shown, the immersion component 29 includes a transparent barrel 291 fixedly connected to the upper side of the interior of the operating table 1, the transparent barrel 291 is located directly below the detection cavity 24, the detection cavity 24 is connected to the transparent barrel 291, the transparent window 282 is located directly in front of the detection cavity 24 and the transparent barrel 291, a water tank 292 is fixedly connected to the left side of the vertical portion of the operating table 1, a blocking cover 293 is inserted on the upper side of the water tank 292, the material guide slope 281 extends to the right side of the water tank 292, and the width of the material guide slope 281 is adapted to the diameter of the transparent barrel 291.

[0052] By adopting the above technical solution, first, after the piston falls from the detection chamber 24 into the transparent barrel 291, it will come into contact with the clean water provided from the inside of the water storage tank 292, and the open end of the water storage tank 292 is blocked by the blocking cover 293. If the crack allows water to penetrate to the top of the piston, bubbles will appear above the piston, and these bubbles are formed by the mixture of water and the gas originally existing above the piston. If the crack is mainly located below the piston and the clean water does not penetrate to the top of the piston, the bubbles will appear below or around the piston, and it can still be visually observed through the transparent window 282. As the piston After passing through the transparent barrel 291, it will eventually fall on the material guide slope 281 and finally slide into the water tank 292. Since the width of the material guide slope 281 is adapted to the diameter of the transparent barrel 291, the sliding pistons on the material guide slope 281 will be arranged in order. Since the pistons entering the transparent barrel 291 will have bubbles of varying degrees and quantities depending on whether there are cracks on the surface of the sealing ring, the bubbles can be visually observed through the transparent window 282 at this time, and it can be determined whether the piston is a defective product based on the number of bubbles. The pistons arranged step by step inside the water tank 292 can be easily taken out quickly, thereby further improving the pre-detection efficiency of the pistons and the sealing rings.

[0053] like Figure 7 and Figure 8 As shown, the expansion component 3 includes an expansion cylinder 31 fixedly connected to the inside of the press-fitting cylinder 21, and the expansion seat 32 is slidably connected to the inside of the expansion cylinder 31, and the expansion seat 32 is located above the horizontal part of the lower end of the operating table 1. An extension cavity 33 is opened inside the press-fitting cylinder 21. The expansion cylinder 31 enters the extension cavity 33 after being expanded by the expansion seat 32, and chamfers are set on the upper and lower sides of the extension cavity 33.

[0054] By adopting the above technical solution, first, when the press-fitting cylinder 21 moves downward, the chamfer set below the extension cavity 33 will first pass through the sealing ring, and the press-fitting cylinder 21 will drive the expansion cylinder 31 to move downward at the same time. The expansion cylinder 31 contacts the expansion seat 32 and deforms according to the shape of the expansion seat 32, and pushes the sealing ring outside the expansion seat 32. The pushed sealing ring will also expand due to the gradually increasing diameter of the expansion seat 32 from top to bottom. At the same time, the expanded expansion cylinder 31 will enter the extension cavity 33. When the sealing ring docks with the piston After that, the pressing cylinder 21 starts to move upward. At this time, the chamfer set below the extension cavity 33 will squeeze the sealing ring and correct the sealing ring. At the same time, the pressing cylinder 21 and the detection component 2 cooperate to quickly send the pressed piston into the detection cavity 24 for detection. This not only ensures the detection efficiency of the piston and the sealing ring, but the pressing cylinder 21 and the expansion cylinder 31 can smoothly complete the pressing of the piston and the sealing ring, reducing the replacement steps of the pressing cylinder 21 and the expansion cylinder 31, so as to achieve the purpose of improving the pressing efficiency of the piston and the sealing ring.

[0055] like Figures 7 to 9 As shown, an oil injection assembly 34 is provided inside the expansion cylinder 31 and inside and outside the expansion seat 32 . The oil injection assembly 34 includes a fixing cylinder 341 fixedly connected to the upper side of the inside of the expansion cylinder 31 .

[0056] The third pressure spring 342 is fixedly connected to the upper inner side of the fixed cylinder 341, and the other end of the third pressure spring 342 is fixedly connected to the extrusion rod 343, and the extrusion rod 343 is slidably connected in the fixed cylinder 341. After the extrusion rod 343 moves downward, it is inserted into the interior of the expansion seat 32. The upper inner side of the expansion seat 32 is provided with a movable groove 344 in an annular array. The movable groove 344 is in an "L" shape. The inner side of the horizontal part of the movable groove 344 is slidably connected with a pressure rod 345. After the extrusion rod 343 moves downward, it is pressed and contacted with the inclined surface of the pressure rod 345. The end of the pressure rod 345 away from the extrusion rod 343 is fixedly connected to a piston member 346, and the end of the piston member 346 away from the pressure rod 345 is in contact with the movable groove A fourth pressure spring 347 is fixedly connected between 344, an annular groove 349 is provided inside the expansion seat 32 at the upper end of the movable groove 344, a second cover plate 321 is fixedly connected to the upper side of the expansion seat 32, the second cover plate 321 is located on the upper side of the annular groove 349, a support ring 348 is slidably connected to the inside of the annular groove 349, the annular groove 349 is connected to the movable groove 344, an annular array of oil outlet holes 3491 are provided on the outer side of the expansion seat 32, the oil outlet holes 3491 are connected to the annular groove 349, a delivery pipe 3492 is fixedly connected to the upper side of the expansion seat 32, the delivery pipe 3492 is connected to the annular groove 349, and the other end of the delivery pipe 3492 is connected to an external oil supply device.

[0057] By adopting the above technical solution, first, during the downward movement of the press-fitting cylinder 21, the internal fixed cylinder 341 supports the extrusion rod 343 through the third pressure spring 342, and the annular groove 349 is formed after the expansion seat 32 is docked with the second cover plate 321, providing sufficient force for the extrusion rod 343 to enter the expansion seat 32 and extrude the pressure rod 345. After the extrusion rod 343 contacts the inclined surface of the pressure rod 345, the pressure rod 345 will drive the piston member 346 to retract into the movable groove 344 and squeeze the fourth pressure spring 347 inside the movable groove 344. At the same time, the piston member 346 squeezes the air inside the movable groove 344 to lift the support ring 348 inside the annular groove 349, so that the lubricating oil above the support ring 348 is pushed to the position corresponding to the oil outlet hole 3491. , and finally slides to the surface of the sealing ring through the oil outlet hole 3491. After the extrusion rod 343 is pulled out from the expansion seat 32, the support ring 348 returns to its original position and squeezes the pressure sensor 353. After the transmission signal is sent to the operating table 1, the external oil supply device will be controlled to send the lubricating oil into the delivery pipe 3492, and finally into the annular groove 349 through the delivery pipe 3492. When the pressure on the pressure sensor 353 reaches the preset value, the delivery pipe 3492 stops supplying oil. Since the lubricating oil can lubricate the sealing ring before and after the sealing ring is squeezed, and the lubricating liquid can form a lubricating film between the contact surfaces of the sealing ring to reduce the friction coefficient, this makes it easier for the sealing ring to fit the sealing surface when expanding, so as to avoid cracks or wear on the sealing ring after it is squeezed and begins to expand, and at the same time reduce the wear of the sealing ring.

[0058] like Figures 7 to 9 As shown, the interior of the press-fitting cylinder 21 and the interior of the expansion seat 32 are jointly provided with an insulation component 35, and the insulation component 35 includes an installation cavity 351 opened in the press-fitting cylinder 21, and the lower side of the press-fitting cylinder 21 is fixedly connected with a first cover plate 211, and the interior of the first cover plate 211 is provided with a connecting groove, and the installation cavity 351 is connected with the interior of the press-fitting cylinder 21 through the connecting groove, and the interior of the installation cavity 351 is fixedly connected with a heating wire 352, and the inner lower side of the annular groove 349 is fixedly connected with a pressure sensor 353, and the upper side of the pressure sensor 353 is in compression contact with the lower side of the support plate 236, and the pressure sensor 353, the heating wire 352 and the operating table 1 are all electrically connected to an external power supply.

[0059] By adopting the above technical solution, the heating wire 352 in the installation cavity 351 is first started to heat in advance, but the temperature inside the press-fitting cylinder 21 is always close to but not more than 80 degrees Celsius. Since the installation cavity 351 is connected with the connecting groove inside the first cover plate 211, and the other end of the connecting groove is connected with the inside of the press-fitting cylinder 21, the heat generated by the heating wire 352 passes through the first cover plate 321 to the outside of the sealing ring, which can slow down the cooling speed of the sealing ring after preheating, so that the sealing ring always remains in a softened state. Since the surrounding temperature of the sealing ring is always kept constant during the expansion process, it is effectively avoided that the sealing ring becomes stiff due to cooling again after preheating, so that the sealing ring can ensure elasticity and can better adapt to the shape of the contact surface to ensure the press-fitting efficiency.

[0060] A press-fitting method for a press-fitting tool for an internal component of an automobile buffer:

[0061] S1: After the hydraulic cylinder 11 pushes the press cylinder 21 downward, the expansion cylinder 31 expands outside the expansion seat 32 and discharges the lubricating oil from the oil outlet 3491, while the heating wire 352 keeps the sealing ring warm;

[0062] S2: After the press-fitting cylinder 21 drives the movable frame 22 to move downward, the press-fitting cylinder 21 will first press the latch 25, so that the latch 25 locks the support plate 236, and the locked support plate 236 will support the piston;

[0063] S3: After the hydraulic cylinder 11 lifts the press cylinder 21 upward, the sealing ring is corrected first, and then the restriction on the support plate 236 is released, so that the support plate 236 is retracted into the moving groove 231, and the piston falls into the detection chamber 24. After the inclined surface of the limit strip 221 contacts the inclined surface of the moving plate 232, the first pressure spring 235 drives the support plate 236 to return to its original position;

[0064] S4: The piston entering the detection chamber 24 will show different descending speeds depending on whether there are cracks on the surface of the sealing ring. After entering the transparent barrel 291, the piston soaked in clean water can further determine whether there are cracks on the surface of the sealing ring by whether bubbles are generated, and the results can be observed through the transparent window 282.

[0065] Working principle: first, the expansion seat 32 is placed above the piston, and the sealing ring is set on the outside of the expansion seat 32. After the hydraulic cylinder 11 above the operating table 1 pushes the pressing cylinder 21 downward, the chamfer set below the extension cavity 33 will first pass through the sealing ring, and at the same time, the fixed cylinder 341 inside the pressing cylinder 21 drives the extrusion rod 343 to squeeze the pressure rod 345 inside the expansion seat 32 through the third pressure spring 342. The squeezed pressure rod 345 will drive the piston member 346 to retract into the movable groove 344, and squeeze the air to lift the support ring 348 inside the annular groove 349, so that the lubricating oil is discharged through the oil outlet 3491. After the support ring 348 returns to its original position, the external oil supply equipment sends the lubricating oil into the delivery pipe 3492, and finally through the delivery The pipe 3492 is fed into the annular groove 349. When the pressure on the pressure sensor 353 reaches the preset value, the delivery pipe 3492 stops supplying oil. At the same time, the heating wire 352 inside the installation cavity 351 will ensure that the temperature inside the press-fitting cylinder 21 is always close to but not more than 80 degrees Celsius, which can slow down the cooling speed of the sealing ring after preheating. The sealing ring pushed by the expansion cylinder 31 will also expand. After the sealing ring docks with the piston, the press-fitting cylinder 21 starts to move upward. At this time, the chamfer set below the extension cavity 33 will squeeze the sealing ring and correct it. When the press-fitting cylinder 21 moves downward, it will drive multiple movable frames 22 to move downward. After the inclined surface inside the movable frame 22 contacts the inclined surface of the movable plate 232, it will cause the movable plate 232 to move downward. 32 drives the first magnetic block 234 to move in the direction of the support plate 236 and pulls the tension spring 233. Before the movable plate 232 moves, the pressing cylinder 21 will first contact the latch 25 and insert the latch 25 into the limiting groove 27 above the support plate 236, making the support plate 236 unable to move. As the pressing cylinder 21 starts to move upward, the movable plate 232 will first contact the side of the limiting strip 221, making it impossible for the movable plate 232 pulled by the tension spring 233 to reset in time. At this time, the latch 25 is pushed upward by the second pressure spring 26 and disengages from the limiting groove 27 above the support plate 236. At this time, the support plate 236 loses the restriction from the latch 25, and the first magnetic block 234 and the second magnetic block 237 are close to each other. The first magnetic block 234 adsorbs the second magnetic block 237, causing the support plate 236 to be pulled into the moving groove 231. After losing the support of the support plate 236, the piston will fall into the detection chamber 24. As the inclined surface of the limit bar 221 contacts the inclined surface of the moving plate 232, the inclined surface of the moving plate 232 will squeeze the inclined surface of the limit bar 221. At this time, the moving plate 232 loses the restriction from the limit bar 221, and the tension spring 233 will drive the moving plate 232 to quickly reset. At this time, the first magnetic block 234 will move away from the second magnetic block 237. Due to the reduction of the magnetic adsorption force between the two, the first pressure spring 235 pushes the support plate 236, and finally returns to the original position and supports the next batch of pistons.

[0066] After the material enters the detection chamber 24, the clean water placed by the immersion component 29 will isolate the air below the detection chamber 24. When cracks appear in the sealing ring, the space above and below the piston is no longer completely isolated. When the piston slides from top to bottom, it will squeeze the air above. This part of the squeezed crack air will leak into the space below the piston through the crack. The pressure difference between the upper and lower spaces will cause the piston to be subjected to an upward force and affect the movement speed of the piston. After the piston falls from the detection chamber 24 into the transparent barrel 291, it will come into contact with the clean water provided from the inside of the water tank 292, and the open end of the water tank 292 is sealed by the sealing cover 293. Bubbles will be generated where cracks appear, which can still be observed intuitively through the transparent window 282. As the piston passes through the transparent barrel 291, it will eventually fall above the material guide slope 281 and finally slide into the water tank 292. Because the width of the material guide slope 281 is compatible with the diameter of the transparent barrel 291, the sliding pistons above the material guide slope 281 will be arranged in order.

[0067] The above is only a preferred specific implementation of the present invention; however, the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solution and its improved conception within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A press-fitting tool for an internal component of an automobile buffer, comprising an operating table (1) and a hydraulic cylinder (11) fixedly connected to the top of the operating table (1), characterized in that: The inner and outer sides of the horizontal portion of the operating table (1) are provided with a detection component (2), and the detection component (2) comprises a pressing cylinder (21) fixedly connected to the telescopic end of the hydraulic cylinder (11); The outer side of the press-fitting cylinder (21) is fixedly connected to a movable frame (22) in a ring array, and the interior of the movable frame (22) is plugged with a limit strip (221); The inner and outer sides of the horizontal part of the operating table (1) are provided with a retracting member (23), the retracting member (23) comprising a movable groove (231) arranged in an annular array inside the lower horizontal part of the operating table (1), the interior of the movable groove (231) is slidably connected with a movable plate (232), the movable frame (22) is sleeved on the outer side of the movable plate (232) after moving downward, a detection cavity (24) is penetrated through the upper side of the lower horizontal part of the operating table (1), the detection cavity (24) is connected to the movable groove (231), a support plate (236) is slidably connected on the side of the movable groove (231) close to the detection cavity (24), a latch (25) is inserted in an annular array on the upper side of the lower horizontal part of the operating table (1), the outer side of the latch (25) is sleeved with a second pressure spring (26), the pressing cylinder (21) presses the latch (25) after moving downward, and a limiting groove (27) is arranged on the upper side of the support plate (236); A tension spring (233) is fixedly connected between the side of the movable plate (232) away from the pressing cylinder (21) and the movable groove (231); a first magnetic block (234) is fixedly connected to the side of the movable plate (232) close to the pressing cylinder (21); a first pressure spring (235) is fixedly connected between the side of the support plate (236) away from the detection chamber (24) and the movable groove (231); a second magnetic block (237) is fixedly connected to the side of the support plate (236) away from the detection chamber (24); and the first magnetic block (234) and the second magnetic block (237) are magnetically attracted to each other; An expansion component (3) is provided inside the press-fitting cylinder (21) and above the horizontal portion of the lower end of the operating table (1). The expansion component (3) comprises an expansion cylinder (31) fixedly connected to the inside of the press-fitting cylinder (21). An expansion seat (32) is slidably connected to the inside of the expansion cylinder (31), and the expansion seat (32) is located above the horizontal portion of the lower end of the operating table (1). An extension cavity (33) is provided inside the press-fitting cylinder (21). After being expanded by the expansion seat (32), the expansion cylinder (31) enters the extension cavity (33). Chamfers are provided on the upper and lower sides of the inside of the extension cavity (33); An oil injection assembly (34) is provided inside the expansion cylinder (31) and inside and outside the expansion seat (32). The oil injection assembly (34) comprises a fixing cylinder (341) fixedly connected to the upper side of the inside of the expansion cylinder (31).

2. A press-fitting tool for an internal component of an automobile buffer according to claim 1, characterized in that: The limit strip (221) penetrates the movable frame (22) from top to bottom, the support plate (236) extends to the inside of the detection chamber (24), the latch (25) moves downward and then inserts into the limit slot (27), a slope is provided at the lower part of the inside of the movable frame (22) away from the pressing cylinder (21), and a slope is provided at the upper part of the side of the movable plate (232) away from the pressing cylinder (21), the movable plate (232) moves toward one side of the pressing cylinder (21) after the slope inside the movable frame (22) and the slope on the side of the movable plate (232) come into sliding contact, and the limit strip (221) moves downward and then comes into compression contact with the side of the movable plate (232) away from the pressing cylinder (21).

3. A press-fitting tool for an internal component of an automobile buffer according to claim 1, characterized in that: An observation component (28) is provided inside the operating table (1), and the observation component (28) comprises a material guide slope (281) arranged at the lower side of the interior of the operating table (1), and the material guide slope (281) is located directly below the detection cavity (24). A transparent window (282) is provided on the front side of the vertical portion of the operating table (1).

4. A press-fitting tool for an internal component of an automobile buffer according to claim 3, characterized in that: The inner and outer sides of the operating table (1) are provided with a soaking assembly (29), the soaking assembly (29) comprising a transparent barrel (291) fixedly connected to the upper side of the inner part of the operating table (1), the transparent barrel (291) being located directly below the detection cavity (24), the detection cavity (24) being connected to the transparent barrel (291), the transparent window (282) being located directly in front of the detection cavity (24) and the transparent barrel (291), the left side of the vertical portion of the operating table (1) being fixedly connected to a water storage tank (292), the upper side of the water storage tank (292) being plugged with a blocking cover (293), the material guide slope (281) extending to the right side of the water storage tank (292), the width of the material guide slope (281) being adapted to the diameter of the transparent barrel (291).

5. The press-fitting tool for the internal parts of the automobile buffer according to claim 1, characterized in that: A third pressure spring (342) is fixedly connected to the upper inner side of the fixed cylinder (341), and the other end of the third pressure spring (342) is fixedly connected to an extrusion rod (343), and the extrusion rod (343) is slidably connected in the fixed cylinder (341). After the extrusion rod (343) moves downward, it is inserted into the interior of the expansion seat (32). The upper inner side of the expansion seat (32) is provided with movable grooves (344) in a circular array. The movable grooves (344) are in an "L" shape. A pressure rod (345) is slidably connected to the inner side of the horizontal part of the movable groove (344). After the extrusion rod (343) moves downward, it is in extrusion contact with the inclined surface of the pressure rod (345). One end of the pressure rod (345) away from the extrusion rod (343) is fixedly connected to a piston member (346), and one end of the piston member (346) away from the pressure rod (345) is in contact with the movable groove (3 A fourth pressure spring (347) is fixedly connected between the expansion seat (32) and the movable groove (344); an annular groove (349) is provided inside the expansion seat (32) at the upper end of the movable groove (344); a second cover plate (321) is fixedly connected to the upper side of the expansion seat (32); the second cover plate (321) is located on the upper side of the annular groove (349); a supporting ring (348) is slidably connected to the inside of the annular groove (349); the annular groove (349) is communicated with the movable groove (344); an oil outlet hole (3491) distributed in an annular array is provided on the outer side of the expansion seat (32); the oil outlet hole (3491) is communicated with the annular groove (349); a delivery pipe (3492) is fixedly connected to the upper side of the expansion seat (32); the delivery pipe (3492) is communicated with the annular groove (349); the other end of the delivery pipe (3492) is communicated with an external oil supply device.

6. A press-fitting tool for an internal component of an automobile buffer according to claim 5, characterized in that: The interior of the press-fitting cylinder (21) and the interior of the expansion seat (32) are both provided with a heat-insulating component (35), the heat-insulating component (35) comprising a mounting cavity (351) opened inside the press-fitting cylinder (21), a first cover plate (211) being fixedly connected to the lower side of the press-fitting cylinder (21), a connecting groove being opened inside the first cover plate (211), the mounting cavity (351) being connected to the interior of the press-fitting cylinder (21) via the connecting groove, a heating wire (352) being fixedly connected to the interior of the mounting cavity (351), a pressure sensor (353) being fixedly connected to the lower side of the inner side of the annular groove (349), the upper side of the pressure sensor (353) being in compression contact with the lower side of the support plate (236), the pressure sensor (353), the heating wire (352) and the operating table (1) being electrically connected to an external power supply.

7. A press-fitting method for a built-in component of an automobile buffer using a press-fitting tool as claimed in any one of claims 1 to 6, characterized in that: The following steps are involved: S1: After the hydraulic cylinder (11) pushes the pressing cylinder (21) downward, the expansion cylinder (31) expands outside the expansion seat (32) and discharges the lubricating oil from the oil outlet hole (3491), while the heating wire (352) keeps the sealing ring warm; S2: After the pressing cylinder (21) drives the movable frame (22) to move downward, the pressing cylinder (21) will first press the latch (25), so that the latch (25) locks the support plate (236), and the locked support plate (236) supports the piston; S3: After the hydraulic cylinder (11) lifts the press cylinder (21) upward, the sealing ring is first corrected, and then the restriction on the support plate (236) is released, so that the support plate (236) is retracted into the movable groove (231), and the piston falls into the detection chamber (24). After the inclined surface of the limit strip (221) contacts the inclined surface of the movable plate (232), the first pressure spring (235) drives the support plate (236) to return to its original position; S4: The piston entering the detection chamber (24) will show different descending speeds depending on whether there are cracks on the surface of the sealing ring. After entering the transparent barrel (291), the piston immersed in clean water can further determine whether there are cracks on the surface of the sealing ring by whether bubbles are generated, and the results can be observed through the transparent window (282).

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