Device for assembling small fluoroplastic sealing ring

Abstract

The utility model belongs to the field of aviation product assembly quality improvement, and relates to a device for assembling a small fluoroplastic sealing ring. Comprising an ejector rod (1), a shaping rod (2), a guide sleeve (3), a shaping block (4) and a valve block (6), a first connecting hole with the diameter being D and a second connecting hole with the diameter being C are formed in the two ends of the shaping block (4), and the guide sleeve (3) is connected with one end of the shaping block (4) through the first connecting hole; the valve block (6) is connected with the other end of the shaping block (4) through the second connecting hole; the shaping block (4) is provided with a variable-diameter hole which is changed from the diameter A of one end to the diameter B of the other end, and the upper end face of the shaping block (4) is provided with a groove used for containing the shaping rod (2); the through hole with the diameter A, the through hole with the diameter B, the through hole of the guide sleeve (3) and the through hole of the valve block (6) are coaxial; the outer diameter of the acting part of the ejector rod (1) is the diameter B. The diameter A is equal to the outer diameter of the fluoroplastic sealing ring (5), and the diameter B is the hole diameter of a mounting hole of the valve block (6).

Description

Technical Field

[0001] This utility model belongs to the field of improving the assembly quality of aviation products, and relates to a device for assembling small fluoroplastic sealing rings. Background Technology

[0002] Hydraulic cylinders are widely used in the field of construction machinery. Their application is closely related to seals, with sealing rings being a common type, which isolate the oil and prevent leakage. If creases or other damage occur on the surface of the sealing ring during installation, oil leakage will occur.

[0003] like Figure 1 As shown, a certain valve body requires a fluoroplastic sealing ring to seal the oil. The fluoroplastic sealing ring mounting groove is located inside the valve body. The outer diameter A of the fluoroplastic sealing ring is 7mm, while the valve body mounting hole diameter B is only 6.5mm. To install the sealing ring, it needs to be shaped to reduce its outer diameter before it can be inserted into the valve body. If it is shaped manually by pinching, the 7mm outer diameter fluoroplastic sealing ring may develop creases due to uneven force, causing oil leakage. A device is needed to evenly shape the fluoroplastic sealing ring to the valve body mounting hole position, avoiding creases and facilitating assembly. Summary of the Invention

[0004] Purpose of the invention: To provide a device for assembling small fluoroplastic sealing rings.

[0005] Technical solution:

[0006] A device for assembling small fluoroplastic sealing rings includes a push rod 1, a shaping rod 2, a guide sleeve 3, a shaping block 4, and a valve block 6. The device is used to install the fluoroplastic sealing ring 5. One end of the shaping block 4 has a first connecting hole with a diameter of D, and the other end has a second connecting hole with a diameter of C. The guide sleeve 3 is connected to one end of the shaping block 4 through the first connecting hole. The valve block 6 is connected to the other end of the shaping block 4 through the second connecting hole. The shaping block 4 has a variable diameter hole that changes from a diameter A at one end to a diameter B at the other end. A groove is provided on the upper surface of the shaping block 4 to accommodate the shaping rod 2. The through holes with diameters A and B, the guide sleeve 3, and the valve block 6 are coaxial. The outer diameter of the working part of the push rod 1 is diameter B, diameter A is equal to the outer diameter of the fluoroplastic sealing ring 5, and diameter B is the mounting hole diameter of the valve block 6.

[0007] Furthermore, the guide sleeve 3 and the shaping block 4 are fitted with a clearance.

[0008] Furthermore, the valve block 6 and the shaping block 4 are fitted with a clearance.

[0009] Furthermore, when the difference between diameter A and diameter B is 5mm, the length F of the variable diameter through hole from diameter A to diameter B is 45mm.

[0010] Further, the shaping rod 2 is a round bar with a diameter E of only 2 mm.

[0011] Further, the shape of the variable-diameter through hole in the shaping block 4 is 4 / 5 circular, which ensures that the fluoroplastic sealing ring does not pop out of the through hole after preliminary shaping.

[0012] Beneficial effects:

[0013] The device for assembling small fluoroplastic sealing rings of the present application realizes the assembly of small fluoroplastic sealing rings through the cooperation of the ejector rod, the shaping rod, the guide sleeve and the shaping block, and the surface of the fluoroplastic sealing ring is free of folds or other damages, and has good sealing performance. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 is a schematic view of the shaft side of the fluoroplastic sealing ring and the valve body and a sectional view;

[0015] Figure 2 is a shaft side structure view of the device for assembling small fluoroplastic sealing rings of the present application;

[0016] Figure 3 is a sectional view of the device for assembling small fluoroplastic sealing rings of the present application;

[0017] Figure 4 is a sectional view of the guide sleeve 3 in the device for assembling small fluoroplastic sealing rings of the present application;

[0018] Figure 5 is a schematic view of the shaping block 4 in the device for assembling small fluoroplastic sealing rings of the present application;

[0019] Among them: 1-ejector rod, 2-shaping rod, 3-guide sleeve, 4-shaping block, 5-fluoroplastic sealing ring, 6-valve block. DETAILED DESCRIPTION

[0020] As Figures 1-5 A device for assembling small fluoroplastic sealing rings, the device comprising an ejector rod 1, a shaping rod 2, a guide sleeve 3, a shaping block 4, and a valve block 6.

[0021] The shaping block 4 has a through hole into which the fluoroplastic sealing ring 5 can be fitted, and the upper end of the shaping block 4 has a groove through which the shaping rod 2 can be pressed into the through hole of the shaping block 4 to achieve preliminary shaping of the fluoroplastic sealing ring 5. The guide sleeve 3 is installed into the shaping block 4 in a clearance fit, and the guide sleeve 3 has a through hole through which the ejector rod 1 enters the through hole of the shaping block 4 to push the fluoroplastic sealing ring 5 into the valve block 6.

[0022] The device for assembling small fluoroplastic sealing rings of the present application has the following characteristics:

[0023] 1: The shaping block 4 has a variable diameter through hole, the diameter of which changes from the outer diameter A of the fluoroplastic sealing ring to the diameter B of the valve body mounting hole. The diameter A side facilitates the fluoroplastic sealing ring to be put in, and the through hole has a high surface roughness requirement to avoid abrasion to the surface of the sealing ring.

[0024] 2: The length F of the variable diameter through hole of the shaping block 4 changes from diameter A to diameter B, which is 45mm. Compared with the diameter A of 7mm and the diameter B of 6.5mm, the longer variable diameter hole can realize uniform deformation of the fluoroplastic sealing ring.

[0025] 3: The shaping rod 2 is a round bar with a diameter E of only 2mm, which ensures that when the fluoroplastic sealing ring 5 is shaped, the sealing ring 5 does not deform permanently due to large deformation, and the shape of the round bar causes the sealing ring 5 to deform uniformly when the fluoroplastic sealing ring 5 is initially shaped.

[0026] 4: In order to facilitate operation, the length of the shaping rod 2 is 80mm, which is made of 30CrMnSiA material and is heat treated to ensure the stiffness of the shaping rod. During use, the shaping rod does not deform.

[0027] 5: A through groove with a width E is provided on the upper side of the shaping block 4, which is consistent with the diameter of the shaping rod 2. When the fluoroplastic sealing ring 5 is shaped in the through hole, it ensures that the shaping rod 2 initially shapes the fluoroplastic sealing ring 5 uniformly from the vertical direction.

[0028] 6: The shape of the variable diameter through hole in the shaping block 4 is 4 / 5 circular, which ensures that the fluoroplastic sealing ring 5 does not pop out of the through hole after initial shaping.

[0029] 7: A circular hole with a diameter D is provided on the left side of the shaping block 4, which is consistent with the outer diameter of the guide sleeve 3, facilitating the installation of the guide sleeve 3. A circular hole with a diameter C is provided on the right side, which is consistent with the outer diameter of the valve body 6, facilitating the installation of the valve body 6. The circular hole with a diameter D, the circular hole with a diameter C, and the variable diameter through hole of the shaping block 4 all have high coaxiality requirements.

[0030] 8: The diameter of the ejector rod 1 is B, which is consistent with the mounting hole diameter of the valve body 6, and has sufficient length. The purpose is to push the initially shaped fluoroplastic sealing ring 5 into the sealing ring mounting groove of the valve body.

[0031] 9: The guide sleeve 3 is provided with a through hole, the hole diameter B of which is consistent with the diameter of the ejector rod. The through hole and the outer diameter of the guide sleeve 3 have strict coaxiality requirements. The purpose is to ensure that after the ejector rod enters the through hole, its movement during the process of pushing the sealing ring conforms to the diameter of the through hole, ensuring that the fluoroplastic sealing ring 5 is shaped smoothly and uniformly and pushed into the mounting position.

[0032] In practical applications, different sealing rings and valve bodies have varying dimensions. The structure of the sealing ring assembly device can be designed accordingly based on different structures and dimensions. The invention will be further illustrated below with installation examples.

[0033] Example 1:

[0034] An apparatus for assembling small fluoroplastic sealing rings, such as Figures 1-5 As shown, the device includes a top rod 1, a shaping rod 2, a guide sleeve 3, a shaping block 4, a fluoroplastic sealing ring 5, and a valve block 6. The device is used to install the fluoroplastic sealing ring 5. One end of the shaping block 4 has a first connecting hole with a diameter of D, and the other end has a second connecting hole with a diameter of C. The guide sleeve 3 is connected to one end of the shaping block 4 through the first connecting hole; the valve block 6 is connected to the other end of the shaping block 4 through the second connecting hole. The shaping block 4 has a variable diameter hole that changes from a diameter A at one end to a diameter B at the other end. A groove is provided on the upper surface of the shaping block 4 to accommodate the shaping rod 2. The through holes with diameters A and B, the guide sleeve 3, and the valve block 6 are coaxial. The outer diameter of the working part of the top rod 1 is diameter B, diameter A is equal to the outer diameter of the fluoroplastic sealing ring 5, and diameter B is the mounting hole diameter of the valve block 6.

[0035] The shaping block 4 has a variable diameter hole that changes from diameter A to diameter B. The diameter A is equal to the outer diameter of the fluoroplastic sealing ring 5. First, the fluoroplastic sealing ring 5 is placed on the side of the shaping block 4 with diameter A. The shaping rod 2 is pressed in through the groove of size E above the shaping block 4 to initially shape the fluoroplastic sealing ring 5. At this time, the fluoroplastic sealing ring 5 is in a heart-shaped form. Next, the guide sleeve 3 is placed on the end of the shaping block 2 with diameter D. The push rod 1 is moved through the through hole of the shaping block 4 to contact the fluoroplastic sealing ring 5. Then, the valve block 6 is placed in the hole of the shaping block 2 with diameter C. The push rod 1 is pushed to make the fluoroplastic sealing ring 5 uniformly shaped in the conical through hole until its outer diameter is shaped to the size B of the valve block mounting hole. The fluoroplastic sealing ring 5 is then pushed into the mounting groove of the valve block 6 to complete the integrated installation and avoid damage to the sealing ring.

Claims

1. A device for assembling small fluoroplastic sealing rings, characterized in that, Includes a top rod (1), a shaping rod (2), a guide sleeve (3), a shaping block (4), and a valve block (6), wherein, The device is used to install the fluoroplastic sealing ring (5). One end of the shaping block (4) is provided with a first connecting hole with a diameter of D, and the other end of the shaping block (4) is provided with a second connecting hole with a diameter of C. The guide sleeve (3) is connected to one end of the shaping block (4) through the first connecting hole. The valve block (6) is connected to the other end of the shaping block (4) through the second connecting hole. The shaping block (4) has a variable diameter hole that changes from a diameter A at one end to a diameter B at the other end. The upper surface of the shaping block (4) is provided with a groove for accommodating the shaping rod (2). The through hole with diameter A, the through hole with diameter B, the through hole of the guide sleeve (3), and the through hole of the valve block (6) are coaxial. The outer diameter of the working part of the top rod (1) is diameter B. The diameter A is equal to the outer diameter of the fluoroplastic sealing ring (5), and the diameter B is the mounting hole diameter of the valve block (6).

2. The apparatus for assembling small fluoroplastic sealing rings according to claim 1, characterized in that, The guide sleeve (3) and the shaping block (4) are fitted with a clearance.

3. The apparatus for assembling small fluoroplastic sealing rings according to claim 1, characterized in that, The valve block (6) and the shaping block (4) are fitted with a clearance.

4. The apparatus for assembling small fluoroplastic sealing rings according to claim 1, characterized in that, When the difference between diameter A and diameter B is 5 mm, the length F of the variable diameter through hole from diameter A to diameter B is 45 mm.

5. The apparatus for assembling small fluoroplastic sealing rings according to claim 1, characterized in that, The shaping rod (2) is a round rod with a diameter E of only 2 mm.

6. The apparatus for assembling small fluoroplastic sealing rings according to claim 1, characterized in that, The shape of the variable diameter through hole in the shaping block (4) is 4 / 5 circle to ensure that the fluoroplastic sealing ring does not pop out of the through hole after the initial shaping.

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