A method for installing an O-ring

Abstract

The invention discloses an installation method of an O-ring, and relates to the technical field of parts assembly, comprising the following steps: S1. prepare a soft rope and an O-ring, pass the two ends of the soft rope through the central hole of the O-ring, one side of the O-ring is two free ends extending out of the O-ring, and the other side is an annular closed section extending out of the O-ring; S2. fix the mandrel on which the O-ring needs to be installed, and sleeve the annular closed section in the annular groove of the mandrel; S3. hold the two free ends of the O-ring, pull the soft rope outward, so that part of the O-ring enters the annular groove of the mandrel, and turn the two free ends of the O-ring to the side where the O-ring does not enter the annular groove of the mandrel; S4. continue to pull the soft rope outward until the soft rope falls off and the sealing ring completely enters the annular groove of the mandrel. The invention can effectively avoid scratches on the O-ring and the mandrel annular groove, and because the installation process is more standardized and controllable, the sealing effect is more reliable, and the service life of the sealing ring is extended.

Description

Technical Field

[0001] The invention relates to the technical field of parts assembly, and in particular to an installation method of an O-shaped sealing ring. Background Art

[0002] The O-ring is a rubber seal ring with a circular cross section, named because its cross-sectional shape resembles the letter "O". The O-ring can deform when subjected to external forces. It is a bidirectional sealing element that can provide sealing in radial or axial directions and is usually installed in a specially designed ring groove.

[0003] At present, when installing an O-ring, the elasticity of the sealing ring is utilized. After the sealing ring is stretched, a hard tool (such as a screwdriver, etc.) is used to pry it into the ring groove of the mandrel to complete the installation. The applicant found that the O-ring installed by inexperienced personnel in the above manner has a poor sealing effect and a short service life. Summary of the invention

[0004] The present invention aims to provide a method for installing an O-ring by pulling a soft rope sleeve, so as to solve the problems of poor sealing effect and short service life when installing the O-ring by the existing method.

[0005] To achieve the above object, the present invention adopts the following technical solution: a method for installing an O-ring, comprising the following steps:

[0006] S1. Prepare a soft rope and an O-ring, pass the two ends of the soft rope through the center hole of the O-ring, one side of the O-ring is the two free ends extending out of the O-ring, and the other side is the annular closed section extending out of the O-ring;

[0007] S2. Fix the mandrel on which the O-ring is to be installed, and insert the annular closing section into the annular groove of the mandrel;

[0008] S3. Hold or clamp the two free ends of the O-ring and pull the soft rope outwards respectively to make part of the O-ring enter the ring groove of the mandrel, and then turn the two free ends of the O-ring to the side where the O-ring does not enter the ring groove of the mandrel;

[0009] S4. Continue to pull the soft rope outward until the soft rope falls off the O-ring and the O-ring completely enters the ring groove of the core shaft.

[0010] The applicant found that when inexperienced personnel use hard tools (such as screwdrivers, etc.) to install O-rings, they are prone to scratching the ring groove of the mandrel and the O-ring due to improper force control. This situation not only affects the sealing effect, but also may shorten the service life of the ring and cause leakage and other problems. After research and observation, the applicant finally invented a soft rope pull installation method for the O-ring. This method not only solves the installation problem caused by lack of experience, but also effectively protects the ring groove of the mandrel and the O-ring itself, avoiding scratches and damage.

[0011] The advantages of this solution are:

[0012] 1. Protect the seal and mandrel

[0013] The soft material of the cord can effectively avoid scratching the O-ring and the mandrel ring groove, ensuring the integrity and service life of the seal. By applying tension evenly, deformation or damage to the O-ring caused by excessive local pressure is avoided.

[0014] 2. Better sealing effect

[0015] This method is relatively simple and easy to master, suitable for operators with different experience levels. Since the installation process is more standardized and controllable, the sealing effect is more reliable, the service life of the sealing ring is extended, the replacement frequency is reduced, and the maintenance cost is reduced.

[0016] Furthermore, the cross section of the soft rope is circular. When the soft rope with a circular cross section contacts the core shaft, the pressure can be distributed more evenly. The friction between the soft rope with a circular cross section and the surface of the core shaft is moderate, and the sealing ring and the core shaft will not be damaged due to excessive friction. The diameter of the soft rope is 1 / 3-1 / 2 of the width of the core shaft ring groove to ensure that the soft rope can provide sufficient tension transmission without causing unnecessary pressure on the core shaft and the sealing ring.

[0017] Furthermore, in step S3, the pulling force of pulling the soft rope outward is 20-60N, which can better pull part of the O-ring into the annular groove of the core shaft.

[0018] Furthermore, in step S3, the angle between the free end of the O-ring and the annular closed section is 100-120°, which can better pull a portion of the O-ring into the annular groove of the core shaft.

[0019] Furthermore, in step S4, the pulling force of pulling the soft rope outward is 40-80N, which can better pull the remaining part of the O-ring into the annular groove of the core shaft.

[0020] Furthermore, nylon or rubber belt has good strength, wear resistance, flexibility and elasticity, so the material of the soft rope is nylon or rubber belt.

[0021] Furthermore, in step S3, tension is applied to the soft rope manually or by a tensioner, and the installation method can be selected according to the number of installations. For a small number of O-ring installation tasks, manual operation is more convenient and efficient. The tensioner can provide stable tension to ensure the consistency and reliability of each installation and reduce the uncertainty caused by human factors; for large-scale installation tasks, the use of a tensioner can significantly improve work efficiency and reduce the time required for a single installation; the tensioner can more accurately control the tension, avoid excessive stretching or squeezing of the seal ring, and effectively protect the seal and the core shaft surface.

[0022] Furthermore, in step S1, lubricating oil is applied to the soft rope; in step S2, after the annular closed section is placed in the annular groove of the core shaft, the soft rope is slid along the inner wall of the annular groove. These steps not only help with inspection and cleaning, but also ensure the proper amount of lubricating oil and improve the quality of installation. The soft rope is coated with lubricating oil to ensure that the lubricating oil is evenly and appropriately applied to the inner side of the sealing ring and the annular groove to avoid too much or too little (such as too much lubricating oil). Impurities in the annular groove are quickly discharged by sliding the soft rope to ensure that the inside of the groove is clean, thereby improving the quality and reliability of installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of a core shaft with a ring groove in an installation method of an O-ring;

[0024] Figure 2 It is a structural schematic diagram of step S1 in a method for installing an O-ring;

[0025] Figure 3 It is a structural schematic diagram of step S2 in a method for installing an O-ring;

[0026] Figure 4 A schematic diagram of the structure of an externally pulled soft rope in step S3 of an O-ring installation method;

[0027] Figure 5 It is a structural schematic diagram of a part of the O-ring entering into the ring groove of the core shaft in step S3 of an O-ring installation method;

[0028] Figure 6 The figure is a schematic diagram of the structure after the installation is completed in step S4 in a method for installing an O-ring. DETAILED DESCRIPTION

[0029] The following is further described in detail through specific implementation methods:

[0030] The reference numerals in the drawings of the specification include: core shaft 1, ring groove 1-1, O-ring 2, and soft rope 3.

[0031] Example 1

[0032] like Figure 1 As shown, the diameter of the core shaft 1 on which the O-ring 2 needs to be installed is 30 mm, and the width of the ring groove 1-1 on the core shaft 1 is 3 mm. The installation method is as follows:

[0033] S1. Prepare a soft rope 3, an O-ring 2 and a tensioner. The cross section of the soft rope 3 is circular, the diameter of the soft rope 3 is 1.5 mm, and the material of the soft rope 3 is nylon, such as Figure 2 As shown, the two ends of the soft rope 3 are passed through the center hole of the O-ring 2, one side of the O-ring 2 is the two free ends extending out of the O-ring 2, and the other side is the annular closed section extending out of the O-ring 2;

[0034] S2. Fix the core shaft 1 on which the O-ring 2 is to be installed, with the end with the ring groove 1-1 facing upwards. Figure 3 As shown, the annular closed section of the O-ring 2 is sleeved into the annular groove 1-1 of the core shaft 1;

[0035] S3. Use a tensioner to tighten the two free ends of the O-ring 2, such as Figure 4 As shown, the angle between the free end of the O-ring 2 and the annular closed section is 100°, and the soft rope 3 is pulled outward with a pulling force of 40N. Figure 5 As shown, the near half of the O-ring 2 is inserted into the annular groove 1-1 of the core shaft 1, and then the two free ends of the O-ring 2 are turned to the side where the O-ring 2 does not enter the annular groove 1-1 of the core shaft 1;

[0036] S4. Continue to pull the soft rope 3 outwards with a pulling force of 60N until the soft rope 3 falls off the O-ring 2. Figure 6 As shown, the O-ring 2 completely enters the annular groove 1 - 1 of the core shaft 1 .

[0037] After installation, carefully check the position and state of the O-ring 2 to ensure that it is fully embedded in the ring groove 1-1 of the core shaft 1 without distortion or damage.

[0038] The soft material of the soft rope 3 using the above method can effectively avoid scratching the O-ring 2 and the ring groove 1-1 of the core shaft 1, ensuring the integrity and service life of the seal. By evenly applying tension, deformation or damage of the O-ring 2 caused by excessive local pressure is avoided. Since the installation process is more standardized and controllable, the tensioner can more accurately control the tension, avoid excessive stretching or squeezing of the seal, and can more effectively protect the seal and the surface of the core shaft 1, making the sealing effect more reliable, extending the service life of the seal, reducing the replacement frequency, and reducing maintenance costs.

[0039] Example 2

[0040] The difference between this embodiment and embodiment 1 is that: in step S1, a small brush or clean gloves are used to evenly apply a thin layer of lubricating oil on the surface of the soft rope 3; in step S2, after the annular closed section is inserted into the annular groove 1-1 of the core shaft 1, ensure that the soft rope 3 is completely located in the annular groove 1-1 and does not exceed the edge of the groove, and then slide the soft rope 3 along the inner wall around the annular groove 1-1.

[0041] After applying a thin layer of lubricating oil on the soft rope 3, as the soft rope 3 slides on the inner wall around the annular groove 1-1, the impurities in the annular groove 1-1 will be quickly discharged; when the soft rope 3 is pulled outward in steps S3 and S4, the soft rope 3 will contact the inner wall of the O-ring 2, and the lubricating oil will be applied to the inner wall of the soft rope 3, so that the O-ring 2 can be installed in the annular groove 1-1 of the core shaft 1 more quickly. This installation method can effectively control the amount of lubricating oil used and avoid the risk of the sealing ring 2 slipping out due to excessive lubricating oil. An appropriate amount of lubricating oil is evenly distributed between the sealing ring 2 and the annular groove 1-1, which can not only provide a good lubrication effect, but also ensure that the sealing performance is not affected.

[0042] Example 3

[0043] The difference between this embodiment and the first embodiment is that the two free ends of the O-ring 2 are tightened manually, and the soft rope 3 is pulled out manually.

[0044] Before installation, operators will be properly trained to ensure that they have the correct force. However, even if the operator applies more or less force, it will not cause scratches on the O-ring 2 and the ring groove 1-1 of the core shaft 1. It will only cause the O-ring 2 to not be quickly put in place at one time, which will only affect the installation efficiency. The installation quality is still more guaranteed than installation using hard tools (such as screwdrivers, etc.).

[0045] Example 4

[0046] The main difference between this embodiment and embodiment 1 is that automated installation is adopted.

[0047] This embodiment includes a conveyor belt, a robot, an industrial camera and a control system. The conveyor belt is provided with a mounting groove for fixing the core shaft 11. The robot and the industrial camera receive and execute instructions from the control system.

[0048] During installation, the core shaft 1 is manually fixed on the conveyor belt through the installation groove, and the two ends of the soft rope 3 are passed through the center hole of the O-ring 2 by a robot, and the annular closed section is sleeved in the ring groove 1-1 of the core shaft 1, and the soft rope 3 is pulled outward by the robot. After the industrial camera detects the image of the O-ring 2 partially inserted into the ring groove 1-1 of the core shaft 1, the control system sends a command to the robot, and the robot turns the two free ends of the O-ring 2 to the side where the O-ring 2 does not enter the ring groove 1-1 of the core shaft 1, and the robot continues to pull the soft rope 3 outward, and finally the soft rope 3 will fall off the O-ring 2, and the O-ring 2 will completely enter the ring groove 1-1 of the core shaft 1.

[0049] The above is only an embodiment of the present invention, and the common knowledge such as the known specific technical solutions and / or characteristics in the solution is not described in detail here. It should be pointed out that for those skilled in the art, without departing from the technical solution of the present invention, several modifications and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A method for installing an O-ring, characterized in that: The following steps are involved: S1. Prepare a soft rope and an O-ring, pass the two ends of the soft rope through the center hole of the O-ring, one side of the O-ring is the two free ends extending out of the O-ring, and the other side is the annular closed section extending out of the O-ring; S2. Fix the mandrel on which the O-ring is to be installed, and insert the annular closing section into the annular groove of the mandrel; S3. Hold or clamp the two free ends of the O-ring and pull the soft rope outwards respectively to make part of the O-ring enter the ring groove of the mandrel, and then turn the two free ends of the O-ring to the side where the O-ring does not enter the ring groove of the mandrel; S4. Continue to pull the soft rope outward until the soft rope falls off the O-ring and the O-ring completely enters the ring groove of the core shaft.

2. The method for installing an O-ring according to claim 1, characterized in that: The cross section of the soft rope is circular, and the diameter of the soft rope is 1 / 3-1 / 2 of the width of the core shaft ring groove.

3. The method for installing an O-ring according to claim 2, characterized in that: In step S3, the tension of the soft rope is 20-60N.

4. A method for installing an O-ring according to any one of claims 1 to 3, characterized in that: In step S3, the angle between the free end of the O-ring and the annular closed section is 100-120°.

5. The method for installing an O-ring according to claim 4, characterized in that: In step S4, the tension of the soft rope is 40-80N.

6. The method for installing an O-ring according to claim 1, characterized in that: The material of the soft rope is nylon or rubber belt.

7. The method for installing an O-ring according to claim 1, characterized in that: In step S3, tension is applied to the soft rope manually or with a tensioner.

8. The method for installing an O-ring according to claim 1, characterized in that: In step S1, lubricating oil is applied to the soft rope; in step S2, after the annular closed section is sleeved into the annular groove of the core shaft, the soft rope is slid along the inner wall of the annular groove.

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