Piston rod buffer seal and preparation method thereof

Abstract

The invention discloses a piston rod buffer seal and a preparation method, the piston rod buffer seal comprises an integrally formed polyurethane main body, the polyurethane main body comprises an upper lip and a lower lip, the included angle between the upper lip and the lower lip is an acute angle, and a gentle slope is arranged at the bottom of the lower lip. In the application, the gentle slope clearance design is performed on the polyurethane root, and meanwhile, a reverse counter-impact force is formed at the groove clearance to counteract the impact force of the first oil pressure, so that the buffering and pressure relief effects are achieved, and the sealing element is suitable for the working conditions of frequent use frequency and strong impact force on the basis of general working conditions, so that the service life of the sealing element is greatly prolonged, and the service life of the sealing element is prolonged. The maintenance period of the oil cylinder and equipment is prolonged, higher economic value is created for a user, a product can be clamped and fixed through the arranged clamping part and the clamping plates on the two movable plates, the clamping plates on the two movable plates can clamp products of different specifications, and the applicability of the device is improved to a certain degree.

Description

Technical Field

[0001] The present invention relates to the technical field of piston rod buffer seals, and in particular to a piston rod buffer seal and a preparation method thereof. Background Art

[0002] The piston rod buffer seal is a key component used in hydraulic cylinders, pneumatic cylinders and other reciprocating devices to slow down the extension or retraction speed of the piston rod and reduce the impact force. It works when the piston approaches the end of the stroke, ensuring smooth deceleration and protecting the system from possible damage caused by sudden stops.

[0003] Chinese patent publication number CN220644521U, publication time 20240322, provides a buffer seal for a piston rod, including an annular sealing body and a retaining ring, the inner ring of the sealing body is formed with an inner lip protruding toward the axial direction of the sealing body, the cross-section of the inner lip is an arc, and the end surface of the sealing body away from the inner lip is provided with a matching groove penetrating the inner ring of the sealing body, the retaining ring is embedded in the matching groove, and the retaining ring is formed with an auxiliary lip toward the axial direction of the sealing body, the cross-section of the auxiliary lip is an arc, and in a natural state, the vertical distance between the inner lip and the axis of the sealing body is smaller than the vertical distance between the auxiliary lip and the axis of the sealing body.

[0004] Existing piston rod buffer seals such as the above are mostly composed of a polyurethane body and a polyoxymethylene retaining ring. The main function of the polyurethane body is to buffer the first pressure of the rod cavity of the oil cylinder and play a pressure relief role. The support of the polyoxymethylene retaining ring enables the main body seal to provide the maximum anti-extrusion force under the vibration pressure load. In the specific implementation process, the combined piston rod buffer seal is often only suitable for general working conditions. For working conditions with frequent use and strong impact, the service life is short and it is easy to leak and fail. Therefore, it is urgent to propose corresponding piston rod buffer seals and preparation methods to solve the above problems. Summary of the invention

[0005] The purpose of the present invention is to propose a piston rod buffer seal and a preparation method in order to solve the above problems.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A piston rod buffer seal comprises an integrally formed polyurethane body, wherein the polyurethane body comprises an upper lip and a lower lip, wherein the angle between the upper lip and the lower lip is an acute angle, and a gentle slope is arranged at the bottom of the lower lip.

[0008] Preferably, the method comprises the following steps:

[0009] S1. Pour the processed raw material polyurethane into a specially made mold for preliminary shaping;

[0010] S2. After the initial shaping, the product is transferred to a high-temperature drying device for high-temperature drying;

[0011] S3. After the drying is completed, the dried product is taken out and transferred to the end surface processing station to perform trimming and impurity removal on the product appearance to ensure that the product surface is smooth;

[0012] S4. After trimming, the products are transferred to the inspection station, where they are inspected. If they do not meet the inspection standards, they are re-machined and re-inspected to ensure that they meet the factory quality standards.

[0013] S5. Products that pass the inspection are transferred to the packaging station and packaged according to the packaging requirements to meet the factory standards.

[0014] Preferably, the high-temperature drying device includes a cabinet, a heating tube installed at the bottom of the cabinet is provided inside the cabinet, a plurality of evenly distributed clamping parts for fixing the product are provided above the heating tube inside the cabinet, a rotating adjustment part cooperating with the clamping part to take and place the product is provided on the outer back side of the cabinet, and a first driving part for driving the rotating adjustment part is provided on the outer back side of the cabinet.

[0015] Preferably, the clamping portion includes a fixing sleeve, two evenly distributed positioning bolts are fixedly installed on both sides of the fixing sleeve, and movable plates sliding therewith are penetrated through the positioning bolts on both sides of the fixing sleeve, and springs are sleeved on the positioning bolts, and a baffle is sleeved on the end of the positioning bolt away from the movable plate, and the spring is placed between the movable plate and the baffle, and a positioning nut for limiting the baffle is threadedly connected to the positioning bolt, and a plurality of evenly distributed clamps are provided on opposite sides of the two movable plates.

[0016] Preferably, the rotation adjustment part includes a rotating sleeve that is rotatably arranged on the back side of the cabinet, a sliding column is slidably arranged inside the rotating sleeve, one end of the sliding column close to the clamping part passes through the rotating sleeve and extends to the inside of the cabinet, and is fixedly connected with a conical top block, and the two movable plates are fixedly provided with a protrusion integrally formed therewith on opposite sides, a through groove is penetrated at one end of the rotating sleeve away from the clamping part, a connecting block is fixedly connected to the sliding column, the connecting block extends to the outside of the rotating sleeve through the through groove, and is fixedly connected to a ring plate sleeved on the rotating sleeve.

[0017] Preferably, the first driving unit includes a servo motor fixed on the outer back wall of the cabinet body, and the servo motor is arbitrarily arranged below one of the rotation adjustment units. The output end of the servo motor is connected to the end of one of the rotating sleeves through a first transmission chain, and the ends of multiple rotating sleeves are connected through a second transmission chain.

[0018] Preferably, a second driving part for driving the sliding column to slide back and forth is provided on the outer back side of the cabinet body, and the second driving part includes a cylinder fixedly installed on the outer back side wall of the cabinet body, and the output end of the cylinder is fixedly connected to a connecting plate that slides relative to the cabinet body, and the bottom of the connecting plate is fixedly connected to a plurality of evenly distributed push plates, and the number of the push plates is the same as the number of the ring plates, and they are arranged one by one.

[0019] Preferably, a sliding groove cooperating with the sliding column is formed through the interior of the rotating sleeve, and a plurality of protrusions integrally formed with the sliding column are fixedly provided on the outer peripheral wall of the sliding column, and the protrusions and the sliding groove are engaged with each other.

[0020] Preferably, an exhaust fan is arranged on the top of the cabinet, a main pipeline interconnected with the interior of the cabinet is arranged on the top of the cabinet, the exhaust fan is connected to the main pipeline, and a plurality of evenly distributed fans are fixedly installed on the inner top of the cabinet.

[0021] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0022] 1. In the present application, the main function of the single polyurethane body is to buffer the first pressure of the rod cavity of the oil cylinder and relieve pressure. The root of the polyurethane is designed with a gentle slope and air avoidance, and at the same time, a reverse impact force is formed at the groove air avoidance to offset the impact force of the first oil pressure, thereby playing a buffering and pressure relief role. It is suitable for general working conditions. For working conditions with frequent use and strong impact, the service life of the seal is greatly delayed, the maintenance cycle of the oil cylinder and equipment is increased, and greater economic value is created for the user. Through the clamping part, the splints on the two movable plates can clamp the product to fix the product, and the splints on the two movable plates can clamp products of different specifications, which improves the applicability of the device to a certain extent.

[0023] 2. In the present application, the rotating adjustment part can drive the clamping part to rotate, so that the surface of the product is dried evenly and the drying efficiency is improved. The ring plate set in the rotating adjustment part pushes the sliding column, so that the conical top block set at the end of the sliding column can automatically open and close the two movable plates, thereby improving convenience. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It shows a front structural schematic diagram of a drying device provided according to an embodiment of the present invention;

[0025] Figure 2 A schematic diagram of the back structure of a drying device provided according to an embodiment of the present invention is shown;

[0026] Figure 3 A partial structural schematic diagram of a drying device provided according to an embodiment of the present invention is shown;

[0027] Figure 4 A schematic diagram of the cooperation structure between the rotation adjustment part and the clamping part provided in an embodiment of the present invention is shown;

[0028] Figure 5 It shows a schematic diagram of the overall structure of the clamping part provided according to an embodiment of the present invention;

[0029] Figure 6 A schematic diagram of the cross-sectional structure of an end portion of a rotation adjustment portion provided in an embodiment of the present invention is shown;

[0030] Figure 7 A schematic diagram of an exploded structure of a rotation adjustment portion provided according to an embodiment of the present invention is shown;

[0031] Figure 8 A schematic structural diagram of the other end portion of the rotation adjustment portion provided according to an embodiment of the present invention is shown.

[0032] Fig. 9 A schematic structural diagram of a piston rod buffer seal product provided according to an embodiment of the present invention is shown.

[0033] Legend:

[0034] 1. Cabinet; 2. Rotation adjustment part; 3. Exhaust fan; 4. First drive part; 5. Second drive part; 6. Main pipeline; 7. Fan; 8. Heating tube; 9. Clamping part; 10. Rotating sleeve; 11. Servo motor; 12. First transmission chain; 13. Second transmission chain; 14. Cylinder; 15. Connecting plate; 16. Push plate; 17. Ring plate; 18. Through groove; 19. Connecting block; 20. Fixed sleeve; 21. Movable plate; 22. Bump; 23. Clamping plate; 24. Positioning bolt; 25. Spring; 26. Baffle; 27. Positioning nut; 28. Conical top block; 29. ​​Sliding column; 30. Sliding groove. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] See also Figure 1-8 , the present invention provides a technical solution:

[0037] A piston rod buffer seal comprises an integrally formed polyurethane body, the polyurethane body comprises an upper lip and a lower lip, the angle between the upper lip and the lower lip is an acute angle, and a gentle slope is arranged at the bottom of the lower lip;

[0038] The high-temperature drying device includes a cabinet 1, a heating tube 8 installed at the bottom is arranged inside the cabinet 1, a plurality of evenly distributed clamping parts 9 for fixing products are arranged above the heating tube 8 inside the cabinet 1, a rotating adjustment part 2 for picking up and placing products in cooperation with the clamping part 9 is arranged on the outer back side of the cabinet 1, a first driving part 4 for driving the rotating adjustment part 2 is arranged on the outer back side of the cabinet 1, the clamping part 9 includes a fixing sleeve 20, two evenly distributed positioning bolts 24 are fixedly installed on both sides of the fixing sleeve 20, and movable plates 21 sliding therewith are penetrated through the positioning bolts 24 on both sides of the fixing sleeve 20, and the positioning bolts 2 4 is sleeved with a spring 25, and a baffle 26 is sleeved on the end of the positioning bolt 24 away from the movable plate 21. The spring 25 is placed between the movable plate 21 and the baffle 26. A positioning nut 27 for limiting the baffle 26 is threadedly connected on the positioning bolt 24. The positioning nut 27 and the positioning bolt 24 are detachably arranged, which is convenient for replacing the spring 25 to ensure the subsequent stable clamping of the two movable plates 21 and avoid the elasticity of the spring 25 not being able to stably clamp the product after long-term use. A plurality of evenly distributed clamping plates 23 are arranged on the opposite side of the two movable plates 21, and the opposite side of the clamping plate 23 is arranged in an arc shape to facilitate the clamping of the product;

[0039] The rotation adjustment part 2 includes a rotating sleeve 10 that is rotatably arranged on the back side of the cabinet 1. A sliding column 29 is slidably arranged inside the rotating sleeve 10. One end of the sliding column 29 close to the clamping part 9 passes through the rotating sleeve 10 and extends to the inside of the cabinet 1. It is fixedly connected with a conical top block 28. The two movable plates 21 are fixedly provided with a convex block 22 integrally formed therewith on the opposite side. A through groove 18 is penetrated at one end of the rotating sleeve 10 away from the clamping part 9. A connecting block 19 is fixedly connected to the sliding column 29. The movable range of the through groove 18 can enable the set conical top block 28 to be able to fully extend out of the rotating sleeve 10, so that the two movable plates 21 can be opened to the maximum distance. The connecting block 19 extends to the outside of the rotating sleeve 10 through the through groove 18. The first drive unit 4 comprises a servo motor 11 fixed to the outer back side wall of the cabinet 1, and the servo motor 11 is arbitrarily arranged below one of the rotating adjustment units 2. The output end of the servo motor 11 is connected to one of the ends of the rotating sleeve 10 through a first transmission chain 12. The ends of the plurality of rotating sleeves 10 are connected through a second transmission chain 13. The first transmission chain 12 and the second transmission chain 13 are arranged to start the plurality of clamping units 9 and the plurality of rotating adjustment units to rotate synchronously, thereby realizing linkage.

[0040] During the processing and production of the buffer seal, when drying, the ring plate 17 is pushed so that the slide column 29 moves the conical top block 28 toward the movable plate 21, so that the conical top block 28 is squeezed between the two protrusions 22, and then the two movable plates 21 are opened by a certain distance, so that the relatively arranged clamping plates 23 are opened by a certain distance, so that the product can be placed between the two clamping plates 23. After the product is placed, the temperature is set, and the electrical switch is turned on, so that the heating tube 8 can raise the temperature inside the cabinet 1 to the set value, and the servo motor 11 drives the rotating sleeve 10 to rotate, so as to drive the overall clamping part 9 to rotate, so that the product can be heated evenly to improve the drying efficiency.

[0041] Specifically, Figure 1 and Figure 3 As shown, a second driving part 5 for driving a sliding column 29 to slide back and forth is provided on the outer back side of the cabinet 1, and the second driving part 5 includes a cylinder 14 fixedly mounted on the outer back side wall of the cabinet 1, and an output end of the cylinder 14 is fixedly connected to a connecting plate 15 that slides relative to the cabinet 1, and a plurality of evenly distributed push plates 16 are fixedly connected to the bottom of the connecting plate 15, and the number of push plates 16 is the same as the number of ring plates 17, and they are arranged one by one;

[0042] For ease of use, the cylinder 14 pushes the connecting plate 15 to move toward the cabinet body 1, so that the push plate 16 on the connecting plate 15 pushes the ring plate 17, so that the sliding column 29 pushes the conical top block 28 to move in the direction of the two protrusions 22, so as to realize the automatic opening of the two relatively arranged clamping plates 23. After the staff quickly places the product on the two clamping plates 23, the conical top block 28 is retracted, and the two clamping plates 23 clamp and fix the product under the action of the set springs 25.

[0043] Specifically, Figure 6 and Figure 7 As shown, a slide groove 30 cooperating with the slide post 29 is provided through the interior of the rotating sleeve 10, and a plurality of protrusions integrally formed therewith are fixedly provided on the outer peripheral wall of the slide post 29, and the protrusions and the slide groove 30 are engaged with each other. The setting of the protrusions enables the slide post 29 to rotate synchronously with the rotating sleeve 10, thereby ensuring the stability of the rotation adjustment part 2.

[0044] Specifically, Figure 1 As shown, an exhaust fan 3 is arranged on the top of the cabinet 1, and a main pipeline 6 which is interconnected with the inside of the cabinet 1 is arranged on the top of the cabinet 1. The exhaust fan 3 is connected with the main pipeline 6, and a plurality of evenly distributed fans 7 are fixedly installed on the inner top of the cabinet 1;

[0045] After drying is completed, in order to quickly take out the product and avoid scalding the staff, the fan 7 and the exhaust fan 3 are started, and the exhaust fan 3 continuously discharges the air inside the cabinet 1, and the fan 7 can also accelerate the cooling;

[0046] A method for preparing a piston rod buffer seal comprises the following steps:

[0047] S1. Pour the processed raw material polyurethane into a specially made mold for preliminary shaping;

[0048] S2. After the initial shaping, the product is transferred to a high-temperature drying device for high-temperature drying;

[0049] S3. After the drying is completed, the dried product is taken out and transferred to the end surface processing station to perform trimming and impurity removal on the product appearance to ensure that the product surface is smooth;

[0050] S4. After trimming, the products are transferred to the inspection station, where they are inspected. If they do not meet the inspection standards, they are re-machined and re-inspected to ensure that they meet the factory quality standards.

[0051] S5. Products that pass the inspection are transferred to the packaging station and packaged according to the packaging requirements to meet the factory standards.

[0052] The above description of the embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A piston rod buffer seal, characterized in that: It comprises an integrally formed polyurethane body, wherein the polyurethane body comprises an upper lip and a lower lip, wherein the angle between the upper lip and the lower lip is an acute angle, and a gentle slope is arranged at the bottom of the lower lip.

2. A method for preparing a piston rod buffer seal, characterized in that: The steps include: S1. Pour the processed raw material polyurethane into a specially made mold for preliminary shaping; S2. After the initial shaping, the product is transferred to a high-temperature drying device for high-temperature drying; S3. After the drying is completed, the dried product is taken out and transferred to the end surface processing station to perform trimming and impurity removal on the product appearance to ensure that the product surface is smooth; S4. After trimming, the products are transferred to the inspection station, where they are inspected. If they do not meet the inspection standards, they are re-machined and re-inspected to ensure that they meet the factory quality standards. S5. Products that pass the inspection are transferred to the packaging station and packaged according to the packaging requirements to meet the factory standards.

3. According to the method for preparing a piston rod buffer seal according to claim 2, the high-temperature drying device comprises a cabinet (1), characterized in that: The cabinet (1) is provided with a heating tube (8) installed at the bottom, the cabinet (1) is provided with a plurality of evenly distributed clamping parts (9) for fixing products near the top of the heating tube (8), the outer back side of the cabinet (1) is provided with a rotation adjustment part (2) for cooperating with the clamping part (9) to take and place products, and the outer back side of the cabinet (1) is provided with a first driving part (4) for driving the rotation adjustment part (2).

4. A method for preparing a piston rod buffer seal according to claim 3, characterized in that: The clamping portion (9) comprises a fixing sleeve (20), two evenly distributed positioning bolts (24) are fixedly mounted on both sides of the fixing sleeve (20), and movable plates (21) sliding therewith are penetrated through the positioning bolts (24) on both sides of the fixing sleeve (20), and springs (25) are sleeved on the positioning bolts (24), and a baffle (26) is sleeved on one end of the positioning bolt (24) away from the movable plate (21), and the spring (25) is placed between the movable plate (21) and the baffle (26), and a positioning nut (27) for limiting the baffle (26) is threadedly connected to the positioning bolt (24), and a plurality of evenly distributed clamping plates (23) are arranged on opposite sides of the two movable plates (21).

5. The method for preparing a piston rod buffer seal according to claim 3, characterized in that: The rotation adjustment part (2) comprises a rotating sleeve (10) which is rotatably arranged on the back side of the cabinet (1), a sliding column (29) is slidably arranged inside the rotating sleeve (10), one end of the sliding column (29) close to the clamping part (9) passes through the rotating sleeve (10) and extends to the inside of the cabinet (1), and is fixedly connected to a conical top block (28), and opposite sides of the two movable plates (21) are fixedly provided with a protrusion (22) integrally formed therewith, and one end of the rotating sleeve (10) away from the clamping part (9) passes through a through groove (18), and a connecting block (19) is fixedly connected to the sliding column (29), and the connecting block (19) extends to the outside of the rotating sleeve (10) through the through groove (18), and is fixedly connected to a ring plate (17) sleeved on the rotating sleeve (10).

6. A method for preparing a piston rod buffer seal according to claim 3, characterized in that: The first driving part (4) comprises a servo motor (11) fixed on the outer back side wall of the cabinet (1); the servo motor (11) is arbitrarily arranged below one of the rotation adjustment parts (2); the output end of the servo motor (11) is connected to the end of one of the rotating sleeves (10) through a first transmission chain (12); and the ends of a plurality of the rotating sleeves (10) are connected through a second transmission chain (13).

7. A method for preparing a piston rod buffer seal according to claim 5, characterized in that: The outer back side of the cabinet (1) is provided with a second driving part (5) for driving the sliding column (29) to slide back and forth. The second driving part (5) includes a cylinder (14) fixedly mounted on the outer back side wall of the cabinet (1). The output end of the cylinder (14) is fixedly connected to a connecting plate (15) that slides relative to the cabinet (1). The bottom of the connecting plate (15) is fixedly connected to a plurality of evenly distributed push plates (16). The number of the push plates (16) is the same as the number of the ring plates (17), and they are arranged in a one-to-one correspondence.

8. The method for preparing a piston rod buffer seal according to claim 5, characterized in that: A sliding groove (30) cooperating with the sliding column (29) is formed through the interior of the rotating sleeve (10), and a plurality of protrusions integrally formed with the sliding column (29) are fixedly provided on the outer peripheral wall of the sliding column (29), and the protrusions and the sliding groove (30) are mutually engaged.

9. A method for preparing a piston rod buffer seal according to claim 3, characterized in that: The top of the cabinet (1) is provided with an exhaust fan (3), the top of the cabinet (1) is provided with a main pipeline (6) which is interconnected with the inside of the cabinet (1), the exhaust fan (3) is connected with the main pipeline (6), and a plurality of evenly distributed fans (7) are fixedly installed on the inner top of the cabinet (1).

Images