Assembling device and assembling method for grouping O-shaped rings and check rings in holes

Abstract

The invention provides an in-hole O-shaped ring and check ring group assembling device and method. The device comprises a feeding positioning mechanism, a press-fitting mechanism and a guide cylinder, and the guide cylinder is used for being inserted into the feeding positioning mechanism and the press-fitting mechanism and serves as a carrier to be inserted into an assembling hole of a part to be assembled at the same time; the feeding positioning mechanism is used for conveying an O-shaped ring and a check ring to a sealing ring groove of a part to be assembled by inserting a guide cylinder; the press fitting mechanism is matched with the feeding mechanism after being inserted into the guide cylinder, and the O-shaped ring and the check ring are assembled into the sealing ring groove. According to the in-hole O-shaped ring and check ring group assembling device and method, the assembling efficiency is improved, and the assembling position relation of the O-shaped rings and the check rings is guaranteed; and the problems of wrong assembly, neglected assembly and repair caused by manual assembly are avoided.

Description

Technical Field

[0001] The invention belongs to the technical field of sealing, and in particular relates to an assembly device and an assembly method for a group of an O-ring and a retaining ring in a hole. Background Art

[0002] In the field of hydraulic component assembly, it involves O-rings and retaining ring sets in holes. In the related art, the main method of in-hole assembly is manual assembly in sequence. Due to the limited space in the hole during assembly, not only is the efficiency low, but improper assembly can also cause wrong sequence or assembly failure. When disassembling and repairing, the O-rings and retaining rings will be damaged or deformed when taken out and cannot be used any more, increasing economic costs. In some related technologies, O-rings can be assembled using devices. The main method is to deform the shape of the O-ring through the clamping jaws so that the O-ring is concave inward, and the O-ring is moved to the sealing groove and then the clamping jaws are taken out, and the O-ring returns to its original state to complete the assembly. However, since the retaining ring is made of a harder material, it cannot be deformed like an O-ring, and the retaining ring assembly cannot be achieved using the same clamping jaw device, and it is even more impossible to achieve group assembly of O-rings and retaining rings. Summary of the invention

[0003] In view of this, the present invention aims to provide an assembly device for groups of O-rings and retaining rings in holes to solve the problems of low working efficiency and easy damage of O-rings and retaining rings during assembly.

[0004] To achieve the above object, the technical solution of the present invention is achieved as follows:

[0005] An assembly device for an O-ring and a retaining ring in a hole comprises a feeding positioning mechanism, a pressing mechanism and a guide cylinder. The guide cylinder is used to be inserted into the feeding positioning mechanism and the pressing mechanism and is inserted into the assembly hole of the part to be assembled as a carrier. The feeding positioning mechanism transports the O-ring and the retaining ring to the sealing ring groove of the part to be assembled by inserting the guide cylinder. The pressing mechanism cooperates with the feeding mechanism after being inserted into the guide cylinder to assemble the O-ring and the retaining ring into the sealing ring groove.

[0006] Furthermore, the feeding positioning mechanism includes a feeding upper part, a feeding middle part and a feeding lower part. The feeding upper part and the feeding middle part are both semi-cylindrical structures. The outer diameter of the feeding upper part is larger than the outer diameter of the feeding middle part. The intersection of the two forms a feeding positioning surface. An annular groove for socketing an O-ring and a retaining ring is formed between the feeding middle part and the feeding lower part, and the feeding lower part is a cylindrical structure.

[0007] Furthermore, the annular groove is a semicircular annular groove.

[0008] Furthermore, the press-fitting mechanism includes an integrated press-fitting upper part and a press-fitting lower part, both of which are semi-cylindrical structures, and a press-fitting positioning surface is formed at the intersection of the two; the outer diameter of the press-fitting upper part is larger than the outer diameter of the press-fitting lower part; and a lower end surface is provided at the bottom of the press-fitting lower part.

[0009] Furthermore, a guide hole for inserting the feeding positioning mechanism and the pressing mechanism is provided inside the guide cylinder, a No. 2 guide angle is provided at the top of the inner wall of the guide hole, and a positioning surface step is provided at the bottom of the guide cylinder.

[0010] Furthermore, the outer diameter of the middle feeding portion is the same as the outer diameter of the press-fitting lower portion, and both match the inner diameter of the guide hole, and the outer diameter of the upper feeding portion is the same as the outer diameter of the press-fitting upper portion.

[0011] Furthermore, the distance from the middle of the feeder to the top surface of the lower part of the feeder is equal to the distance from the upper end of the guide cylinder to the lower end of the sealing ring groove of the part to be assembled; the distance from the press-fitting positioning surface to the lower end of the sealing ring groove of the part to be assembled is equal to the distance from the upper end of the guide cylinder to the lower end of the sealing ring groove of the part to be assembled.

[0012] Compared with the prior art, the assembly device for the O-ring and retaining ring in the hole of the present invention has the following advantages:

[0013] (1) The assembly device for the O-ring and retaining ring in the hole of the present invention has a simple structure, improves the assembly efficiency, and ensures the assembly position relationship between the O-ring and the retaining ring; it avoids the problems of wrong assembly, missing assembly and rework caused by manual assembly.

[0014] (2) The assembly device for the O-ring and retaining ring in the hole of the present invention does not involve the process of stretching and compressing the O-ring and retaining ring during the assembly process, thereby ensuring that the performance and quality of the O-ring and retaining ring are not affected.

[0015] Another object of the present invention is to provide a method for assembling a group of O-rings and retaining rings in a hole to solve the problem of low working efficiency and easy damage of the O-rings and retaining rings during assembly.

[0016] To achieve the above object, the technical solution of the present invention is achieved as follows:

[0017] The assembly method of the O-ring and the retaining ring in the hole comprises the following steps:

[0018] S1. Place the assembly hole of the part to be assembled upward, and place the guide cylinder on the upper part of the assembly hole so that the positioning surface step of the guide cylinder coincides with the bottom surface of the upper part of the assembly hole;

[0019] S2, transporting the O-ring and the retaining ring to the sealing ring groove of the part to be assembled through the feeding and positioning mechanism;

[0020] S3, assemble the O-ring and the retaining ring into the sealing ring groove through the cooperation of the press-fitting mechanism and the feeding mechanism;

[0021] S4. Take out the feeding positioning mechanism, the pressing mechanism and the guide cylinder from the assembly hole at the same time, and the assembly is completed.

[0022] Furthermore, the specific method for transporting the O-ring and the retaining ring in S2 to the sealing ring groove of the part to be assembled is: putting the O-ring and the retaining ring to be installed on the outside of the annular groove of the feeding positioning mechanism, pulling the O-ring and the retaining ring upward, so that the O-ring and the retaining ring can enter the guide hole without interference at the entrance of the guide cylinder, and the feeding positioning mechanism pushes the O-ring and the retaining ring downward along the guide hole to the sealing ring groove of the part to be assembled until the feeding positioning surface of the feeding positioning mechanism coincides with the upper end surface of the guide cylinder.

[0023] Furthermore, the specific method for assembling the O-ring and the retaining ring into the sealing ring groove in S3 is: placing the press-fitting mechanism into the radially vacant end of the guide hole and pushing it downward until the lower end surface contacts the O-ring and the retaining ring, and then continuing to push the press-fitting mechanism downward while moving the press-fitting mechanism and the feeding positioning mechanism circumferentially along the inner wall of the guide cylinder, so that the O-ring and the retaining ring are assembled into the sealing ring groove of the to-be-assembled part under the axial thrust and circumferential motion state, until the press-fitting positioning surface of the press-fitting mechanism coincides with the upper end surface of the guide cylinder.

[0024] The advantages of the assembly method of the O-ring and retaining ring in the hole group and the assembly device of the O-ring and retaining ring in the hole group over the prior art are the same, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0026] Figure 1 It is a schematic diagram of an assembly device for a group of an O-ring and a retaining ring in a hole according to an embodiment of the present invention;

[0027] Figure 2 It is a schematic diagram of the feeding positioning mechanism according to an embodiment of the present invention;

[0028] Figure 3 A schematic diagram of a press-fitting mechanism according to an embodiment of the present invention;

[0029] Figure 4 It is a schematic diagram of the accessories to be assembled according to an embodiment of the present invention.

[0030] Description of reference numerals:

[0031] 1-feeding positioning mechanism; 11-feeding upper part; 12-feeding middle part; 13-feeding positioning surface; 14-annular groove; 15-guide angle No. 1; 16-feeding lower part; 2-pressing mechanism; 21-pressing upper part; 22-pressing lower part; 23-lower end surface; 24-pressing positioning surface; 25-rounded corner; 3-guide cylinder; 31-guide hole; 32-guide angle No. 2; 33-positioning surface step. DETAILED DESCRIPTION

[0032] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0033] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and the like are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", and the like may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0034] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0035] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0036] Glossary:

[0037] Parts to be assembled: The parts to be assembled are provided with an assembly hole, and the assembly hole has a relatively defined upper part and a lower part along its axial direction, and a sealing ring groove is provided between the upper part and the lower part.

[0038] An assembly device in which an O-ring and a retaining ring are grouped in a hole, such as Figures 1 to 3 As shown, it includes a feeding positioning mechanism 1, a pressing mechanism 2 and a guide cylinder 3.

[0039] The guide cylinder 3, as a carrier, is inserted into the assembly hole of the part to be assembled, and the guide hole is used to insert the feeding positioning mechanism 1 and the pressing mechanism 2;

[0040] The feeding and positioning mechanism 1 transports the O-ring and the retaining ring to the sealing ring groove of the part to be assembled by inserting the guide cylinder 3;

[0041] The press-fitting mechanism 2 cooperates with the feeding mechanism 1 and moves circumferentially along the inner wall of the guide cylinder 3 to assemble the O-ring and the retaining ring into the sealing ring groove.

[0042] Preferably, the feed positioning mechanism 1 is an integrated structure. The feed positioning mechanism 1 includes a feed upper portion 11, a feed middle portion 12 and a feed lower portion 16, the feed upper portion 11 and the feed middle portion 12 are both semi-cylindrical structures, and the outer diameters of the two are different, and a stepped surface is formed at the intersection of the two; in one or more embodiments, the outer diameter of the feed upper portion 11 is greater than the outer diameter of the feed middle portion 12, and a feed positioning surface 13 is formed at the intersection of the two; an annular groove 14 is formed between the feed middle portion 12 and the feed lower portion 16, and the feed lower portion 16 is a cylindrical structure.

[0043] In order to ensure that the pressing mechanism 2 can smoothly squeeze the O-ring and the retaining ring into the sealing ring groove of the component Z to be assembled during the pressing action during the assembly process, a first guide angle 15 is formed below the feeding middle part 12.

[0044] The annular groove 14 is a semicircular annular groove.

[0045] Preferably, the press-fitting mechanism 2 is an integrated structure. The press-fitting mechanism 2 includes an integrated press-fitting upper part 21 and a press-fitting lower part 22, both of which are semi-cylindrical structures, and a press-fitting positioning surface 24 is formed at the intersection of the two; the outer diameter of the press-fitting upper part 21 is greater than the outer diameter of the press-fitting lower part 22; the bottom of the press-fitting lower part 22 is provided with a lower end surface 23; in order to prevent the O-ring and the retaining ring from being damaged during the assembly process, a fillet 25 is formed between the lower end surface 23 and the outer shell of the press-fitting lower part 22.

[0046] In one or more embodiments, the press-fit upper portion 21 and the press-fit lower portion 22 are both hollow semi-cylindrical structures.

[0047] In order to increase the friction force, knurling is provided on the arc surface of the feeding upper part 11 and the arc surface of the press-fitting upper part 21 .

[0048] The feeding positioning mechanism 1 and the pressing mechanism 2 are both integrally formed, and after forming, they are bisected along the axis according to structural requirements, and the cut surface is kept perpendicular to the end surface.

[0049] A guide hole 31 is provided inside the guide cylinder 3, and a second guide angle 32 is provided at the top of the inner wall of the guide hole. The second guide angle 32 is used to guide when the O-ring and the retaining ring are installed. The outer wall structure of the guide cylinder 3 is adapted to the structure of the upper part of the assembly hole, and a positioning surface step 33 matching the assembly hole structure is provided. Preferably, the guide hole 31 is a cylindrical through hole, which guides the feeding positioning mechanism 1 and the press-fitting mechanism 2, and ensures that the O-ring, the retaining ring and the sealing ring groove on the part are coaxial.

[0050] The outer diameter of the feeding middle part 12 is the same as the outer diameter of the press-fitting lower part 22, and both are matched with the inner diameter of the guide hole 31, so that when the feeding upper part 11 and the press-fitting upper part 21 are inserted into the guide hole 31 during assembly, the cylindrical shape formed by the outer diameter of the feeding middle part 12 and the press-fitting lower part 22 after contact can fit the inner diameter of the guide hole 31. The outer diameter of the feeding upper part 11 is the same as the outer diameter of the press-fitting upper part 21. The distance from the feeding middle part 12 to the top surface of the feeding lower part 16 is equal to the distance from the upper end of the guide cylinder 3 to the lower end of the sealing ring groove of the part to be assembled. The distance from the press-fitting positioning surface 24 to the lower end of the sealing ring groove of the part to be assembled is equal to the distance from the upper end of the guide cylinder 3 to the lower end of the sealing ring groove of the part to be assembled.

[0051] like Figures 1 to 4 As shown, for the convenience of description and understanding, the O-ring is marked as X, the retaining ring is marked as Y, and the part to be assembled is marked as Z. The sealing ring groove of the part to be assembled Z needs to be installed with the O-ring X and the retaining ring Y;

[0052] The assembly method of the O-ring and the retaining ring in the hole comprises the following steps:

[0053] S1. Place the assembly hole of the component Z to be assembled on the mounting table with the assembly hole facing upwards, and manually place the guide cylinder 3 from top to bottom along the axial direction into the upper part of the assembly hole of the component Z to be assembled, so that the positioning surface step 33 of the guide cylinder 3 coincides with the bottom surface of the upper part of the assembly hole of the component Z to be assembled;

[0054] S2. The O-ring X and retaining ring Y to be installed are sleeved on the outside of the annular groove 14 of the feeding positioning mechanism 1 according to the assembly position requirements, and a part of the O-ring X and the retaining ring Y are manually assisted to be pulled upward along the feeding upper part 11 of the feeding positioning mechanism 1. At this time, the O-ring X and the retaining ring Y are deformed from a circular ring shape to an elliptical ring shape. This action allows the O-ring and the retaining ring to enter the guide hole 31 without interference at the entrance of the guide cylinder 3. The feeding positioning mechanism 1 pushes the O-ring X and the retaining ring Y downward along the guide hole 31 to the sealing ring groove of the assembly Z until the feeding positioning surface 13 of the feeding positioning mechanism 1 and the upper end surface of the guide cylinder 3 completely overlap.

[0055] S3. Manually place the press-fitting mechanism 2 into the radially vacant end of the guide hole 31, and push it axially from top to bottom into the sealing ring groove until the lower end surface 23 contacts the O-ring X and the retaining ring Y; then continue to push the press-fitting mechanism 2 downward while moving the press-fitting mechanism 2 and the feeding positioning mechanism 1 circumferentially along the inner wall of the guide cylinder 3, so that the O-ring X and the retaining ring Y can be easily shifted to the sealing ring groove of the component Z to be assembled under the axial thrust and circumferential movement. After the press-fitting mechanism 2 is axially displaced until the press-fitting positioning surface 24 coincides with the upper end surface of the guide cylinder 3, the O-ring X and the retaining ring Y are assembled into the sealing ring groove of the component Z to be assembled.

[0056] S4. The feeding positioning mechanism 1, the pressing mechanism 2 and the guide cylinder 3 are simultaneously taken out from the assembly hole along the axial direction, and the assembly is completed.

[0057] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An assembly device for a group of O-rings and retaining rings in a hole, characterized in that: It includes feeding positioning mechanism, pressing mechanism and guide cylinder. The guide cylinder is used to insert into the feeding positioning mechanism and the pressing mechanism, and at the same time, serves as a carrier to be inserted into the assembly hole of the part to be assembled; The feeding and positioning mechanism transports the O-ring and retaining ring to the sealing ring groove of the part to be assembled by inserting the guide cylinder; The press-fitting mechanism cooperates with the feeding mechanism after inserting the guide cylinder to assemble the O-ring and the retaining ring into the sealing ring groove.

2. The assembly device for the O-ring and retaining ring in a hole as claimed in claim 1, characterized in that: The feeding positioning mechanism includes a feeding upper part, a feeding middle part and a feeding lower part. The feeding upper part and the feeding middle part are both semi-cylindrical structures. The outer diameter of the feeding upper part is larger than the outer diameter of the feeding middle part, and a feeding positioning surface is formed at the intersection of the two. An annular groove for sleeve-connecting an O-ring and a retaining ring is formed between the feeding middle part and the feeding lower part, and the feeding lower part is a cylindrical structure.

3. The assembly device for the O-ring and retaining ring in a hole as claimed in claim 2, characterized in that: The annular groove is a semicircular annular groove.

4. The assembly device for the O-ring and retaining ring in a hole as claimed in claim 2, characterized in that: The press-fitting mechanism includes an integral press-fitting upper part and a press-fitting lower part, both of which are semi-cylindrical structures, and a press-fitting positioning surface is formed at the intersection of the two; the outer diameter of the press-fitting upper part is larger than the outer diameter of the press-fitting lower part; and a lower end surface is provided at the bottom of the press-fitting lower part.

5. The assembly device for the O-ring and retaining ring in a hole as claimed in claim 4, characterized in that: A guide hole for inserting a feeding positioning mechanism and a pressing mechanism is arranged inside the guide cylinder, a second guide angle is arranged at the top of the inner wall of the guide hole, and a positioning surface step is arranged at the bottom of the guide cylinder.

6. The assembly device for the O-ring and retaining ring in a hole as claimed in claim 5, characterized in that: The outer diameter of the middle part of the feed is the same as the outer diameter of the lower part of the press-fit, and both match the inner diameter of the guide hole. The outer diameter of the upper part of the feed is the same as the outer diameter of the upper part of the press-fit.

7. The assembly device for the O-ring and retaining ring in a hole as claimed in claim 4, characterized in that: The distance from the middle of the feeder to the top surface of the lower part of the feeder is equal to the distance from the upper end of the guide cylinder to the lower end of the sealing ring groove of the part to be assembled; the distance from the press-fitting positioning surface to the lower end of the sealing ring groove of the part to be assembled is equal to the distance from the upper end of the guide cylinder to the lower end of the sealing ring groove of the part to be assembled.

8. A method for assembling a group of O-rings and retaining rings in a hole, characterized in that: The steps include: S1. Place the assembly hole of the part to be assembled upward, and place the guide cylinder on the upper part of the assembly hole so that the positioning surface step of the guide cylinder coincides with the bottom surface of the upper part of the assembly hole; S2, transporting the O-ring and the retaining ring to the sealing ring groove of the part to be assembled through the feeding and positioning mechanism; S3, assemble the O-ring and the retaining ring into the sealing ring groove through the cooperation of the press-fitting mechanism and the feeding mechanism; S4. Take out the feeding positioning mechanism, the pressing mechanism and the guide cylinder from the assembly hole at the same time, and the assembly is completed.

9. The method for assembling a group of an O-ring and a retaining ring in a hole according to claim 8, characterized in that: The specific method for transporting the O-ring and the retaining ring in S2 to the sealing ring groove of the part to be assembled is: put the O-ring and the retaining ring to be assembled on the outside of the annular groove of the feeding positioning mechanism, pull the O-ring and the retaining ring upward, so that the O-ring and the retaining ring can enter the guide hole without interference at the entrance of the guide cylinder, and the feeding positioning mechanism pushes the O-ring and the retaining ring downward along the guide hole to the sealing ring groove of the part to be assembled until the feeding positioning surface of the feeding positioning mechanism coincides with the upper end surface of the guide cylinder.

10. The method for assembling a group of an O-ring and a retaining ring in a hole according to claim 8, characterized in that: The specific method for assembling the O-ring and the retaining ring into the sealing ring groove in S3 is: placing the press-fitting mechanism into the radially vacant end of the guide hole and pushing it downward until the lower end surface contacts the O-ring and the retaining ring, and then continuing to push the press-fitting mechanism downward while moving the press-fitting mechanism and the feeding positioning mechanism circumferentially along the inner wall of the guide cylinder, so that the O-ring and the retaining ring are assembled into the sealing ring groove of the to-be-assembled part under the axial thrust and circumferential motion, until the press-fitting positioning surface of the press-fitting mechanism coincides with the upper end surface of the guide cylinder.

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