Method for assembling a sealing retainer ring and o-ring in a bore

Abstract

The embodiment of the present application provides a hole sealing retainer ring and O-ring assembling method. Wherein, the assembling part to be sealed has an assembling hole, the assembling hole has a first end and a second end arranged oppositely along the axial direction, and the assembling hole is provided with a sealing ring groove at a position between the first end and the second end; the hole sealing retainer ring and O-ring assembling method comprises the following steps: a retainer ring push rod pushes the retainer ring into the sealing ring groove, an O-ring contraction mechanism is used to deform the O-ring to reduce the outer diameter of the O-ring, the deformed O-ring is put into the position of the sealing ring groove through the O-ring contraction mechanism, after the O-ring is released, the O-ring is naturally and elastically expanded in the sealing ring groove, and the retainer ring push rod and the O-ring contraction mechanism are withdrawn. Therefore, the hole sealing retainer ring and O-ring assembling method of the embodiment of the present application has the advantages of high assembling efficiency and assembling precision and good sealing effect.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of sealing, in particular to a hole sealing retainer ring and O-ring assembly method. BACKGROUND

[0002] Hydraulic actuators need to involve hole retainer ring and O-ring assembly, and the assembly of O-ring and retainer ring is a key procedure for the sealing of hydraulic components. In the related art, the elastic retainer ring and sealing O-ring in the hydraulic actuator are mostly assembled manually one by one. Specifically, the retainer ring O-ring is assembled into the hole sealing groove by fingers, and whether the assembly is correct is judged by the sense of touch and vision of the fingers. Because the O-ring material is soft and has large elasticity, positioning is difficult, and cutting ring phenomenon is easy to occur during assembly, which damages the sealing property of the O-ring. Not only is the assembly efficiency low, but also the problems of missing, missing and misassembly are prone to occur. SUMMARY

[0003] The present application aims to at least solve one of the technical problems in the related art. To this end, an embodiment of the present application proposes a hole sealing retainer ring and O-ring assembly method. The hole sealing retainer ring and O-ring assembly method has the advantages of high assembly efficiency, high assembly accuracy and good sealing effect.

[0004] The hole sealing retainer ring and O-ring assembly method of the present application embodiment, the assembly part to be sealed has an assembly hole (an inner hole), the assembly hole has a first end and a second end arranged opposite along its axial direction, the assembly hole is provided with a sealing ring groove at a position between the first end and the second end, and the retainer ring push rod pushes the retainer ring into the sealing ring groove; the O-ring is deformed by the O-ring contraction mechanism to reduce the outer diameter of the O-ring, and the deformed O-ring is placed in the position of the sealing ring groove by the O-ring contraction mechanism, and after the O-ring is released, the O-ring naturally and elastically expands in the sealing ring groove, and the retainer ring push rod and the O-ring contraction mechanism are withdrawn to simultaneously install the retainer ring and the O-ring.

[0005] The hole sealing retainer ring and O-ring assembly method of the present application embodiment deforms the flexible O-ring by the O-ring contraction mechanism to reduce the outer diameter of the O-ring, and places the deformed O-ring in the position of the sealing ring groove by the O-ring contraction mechanism, and after the O-ring is released, the O-ring naturally and elastically expands in the sealing ring groove, avoiding the problems of missing, missing and misassembly caused by manual participation, and further improving the assembly efficiency of the sealing retainer ring and O-ring. In addition, the O-ring does not need to be tightened during placement, avoiding the problems of O-ring damage and scratches on the surface of the workpiece affecting the sealing property during the tightening operation.

[0006] Therefore, the hole sealing retainer ring and O-ring assembling method has the advantages of high assembling efficiency, high assembling accuracy and good sealing effect.

[0007] In some embodiments, the O-ring is deformed along its radial direction by the O-ring shrinking mechanism.

[0008] In some embodiments, the O-ring shrinking mechanism comprises a driving member, a positioning member and a plurality of clamping portions, the plurality of clamping portions are arranged on the positioning member in a circumferential direction of the positioning member, each of the clamping portions is connected to the driving member so as to be driven by the driving member to move along the radial direction and the axial direction of the positioning member, thereby deforming and releasing the O-ring.

[0009] In some embodiments, the positioning member comprises a positioning column and a plurality of shaped rods, each of the shaped rods is arranged at one end of the positioning column in a divergent manner along the circumferential direction of the positioning column, the adjacent shaped rods form a clearance therebetween, and the clamping portions are arranged correspondingly to the clearances.

[0010] In some embodiments, the positioning column is provided with a plurality of positioning grooves, the depths of the positioning grooves are arranged in a divergent manner along the radial direction of the positioning column, and the clamping portions are movably and one-to-one arranged in the positioning grooves along the depth direction of the positioning grooves.

[0011] In some embodiments, the driving member comprises an operating portion, an axial driving portion and a plurality of radial driving portions, the axial driving portion is connected to the operating portion, the plurality of radial driving portions are connected to the axial driving portion so as to be driven by the axial driving portion to move along the axial direction of the clamping portions, and the plurality of radial driving portions are movably connected to the plurality of clamping portions correspondingly along the radial direction of the positioning column.

[0012] In some embodiments, the length of the clamping portion protruding from one end of the positioning member is greater than the thickness of the O-ring, and the length of the clamping portion protruding from one end of the positioning member is less than the length of the sealing ring groove minus the thickness of the retainer ring.

[0013] In some embodiments, the clamping portion is three, and the three clamping portions are uniformly arranged on the positioning member along the circumferential direction of the positioning member.

[0014] In some embodiments, the retainer ring is cut before assembling, and the cut retainer ring is assembled into the assembling hole.

[0015] In some embodiments, the angle of the central angle corresponding to the cutout is 30°-75°.

[0016] In some embodiments, the cutout is a beveled cutout. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a hole sealing retainer ring, O-ring assembly method of an embodiment of the present application, assembly process one.

[0018] Figure 2 is a hole sealing retainer ring, O-ring assembly method of an embodiment of the present application, assembly process two.

[0019] Figure 3 is a hole sealing retainer ring, O-ring assembly method of an embodiment of the present application, assembly process three.

[0020] Figure 4 is a hole sealing retainer ring, O-ring assembly method of an embodiment of the present application, assembly process four.

[0021] Figure 5 is a perspective view of an O-ring shrinkage mechanism of an embodiment of the present application, clamping process one.

[0022] Figure 6 is a perspective view of an O-ring shrinkage mechanism of an embodiment of the present application, clamping process two.

[0023] Figure 7 is a perspective view of a sealing retainer ring of an embodiment of the present application.

[0024] Reference signs:

[0025] to-be-sealed assembly 1; assembly hole 11; sealing ring groove 12;

[0026] O-ring shrinkage mechanism 2; driving member 21; operation part 211; axial driving part (not shown); radial driving part 212; positioning member 22; positioning column 221; positioning groove 2211; shaping rod 222; avoiding part 223; clamping part 23;

[0027] O-ring 3;

[0028] retainer ring push rod 4;

[0029] retainer ring 5; cutout 51. DETAILED DESCRIPTION

[0030] Embodiments of the present application are described in detail below, examples of which are shown in the accompanying drawings. The embodiments described below by reference to the drawings are exemplary and are intended to explain the present application, and cannot be understood as a limitation of the present application.

[0031] The following describes Figures 1-7 a hole sealing retainer ring, O-ring assembly method of an embodiment of the present application.

[0032] The hole sealing retainer ring and O-ring assembly method of the embodiment of the present application is characterized in that the assembly hole 11 has a first end and a second end arranged oppositely along the axial direction of the assembly hole 11, and the sealing ring groove 12 is arranged at a position between the first end and the second end of the assembly hole 11. The hole sealing retainer ring and O-ring assembly method comprises the following steps: the retainer ring push rod 4 pushes the retainer ring 5 into the sealing ring groove 12; the O-ring shrinkage mechanism 2 is used to deform the O-ring 3 to reduce the outer diameter of the O-ring 3, and the deformed O-ring 3 is placed into the sealing ring groove 12 by the O-ring shrinkage mechanism 2; after the O-ring 3 is released, the O-ring 3 is naturally and elastically expanded in the sealing ring groove 12; and the retainer ring push rod 4 and the O-ring shrinkage mechanism 2 are withdrawn to simultaneously install the retainer ring 5 and the O-ring 3.

[0033] The hole sealing retainer ring and O-ring assembly method of the embodiment of the present application is characterized in that the assembly hole 11 has a first end and a second end arranged oppositely along the axial direction of the assembly hole 11, and the sealing ring groove 12 is arranged at a position between the first end and the second end of the assembly hole 11. The hole sealing retainer ring and O-ring assembly method comprises the following steps: the retainer ring push rod 4 pushes the retainer ring 5 into the sealing ring groove 12; the O-ring shrinkage mechanism 2 is used to deform the O-ring 3 to reduce the outer diameter of the O-ring 3, and the deformed O-ring 3 is placed into the sealing ring groove 12 by the O-ring shrinkage mechanism 2; after the O-ring 3 is released, the O-ring 3 is naturally and elastically expanded in the sealing ring groove 12; and the retainer ring push rod 4 and the O-ring shrinkage mechanism 2 are withdrawn to simultaneously install the retainer ring 5 and the O-ring 3.

[0034] Therefore, the hole sealing retainer ring and O-ring assembly method of the embodiment of the present application has the advantages of high assembly efficiency, high assembly accuracy and good sealing effect.

[0035] Specifically, the O-ring shrinkage mechanism 2 is taken out from the upper end of the assembly part 1 to be sealed, and the retainer ring push rod 4 is taken out from the lower end of the assembly part 1 to be sealed.

[0036] It can be understood that the diameter of the sealing ring groove 12 is greater than the diameter of the assembly hole 11. The central axis of the assembly hole 11 is collinear with the central axis of the sealing ring groove 12.

[0037] As shown in FIG. 1, the O-ring shrinkage mechanism 2 drives the O-ring 3 to deform along the radial direction of the O-ring 3 to make the O-ring 3 have enough space to be assembled into the assembly hole 11. Figures 1 to 6

[0038] The hole sealing retainer ring and O-ring assembly method of the embodiment of the present application controls the O-ring 3 to deform along the radial direction of the O-ring 3 by the O-ring shrinkage mechanism 2. Thus, the problem of the O-ring 3 being twisted and deformed can be avoided, and the problem of the O-ring 3 being cut can be avoided. Therefore, the assembly accuracy of the O-ring 3 is improved.

[0039] As shown in FIG. 1, the O-ring shrinkage mechanism 2 drives the O-ring 3 to deform along the radial direction of the O-ring 3 to make the O-ring 3 have enough space to be assembled into the assembly hole 11. Figures 1 to 6 ​As shown, the O-ring shrinkage mechanism 2 includes a drive member 21, a positioning member 22, and a plurality of clamping parts 23. The plurality of clamping parts 23 are arranged at intervals along the circumference of the positioning member 22. Each clamping part 23 is connected to the drive member 21 so that the drive member 21 drives the clamping part 23 to move radially and axially along the positioning member 22 to achieve deformation and release of the O-ring 3.

[0040] The method for assembling the in-hole sealing ring and O-ring in this embodiment of the invention divides the O-ring shrinkage mechanism 2 into a driving member 21, a positioning member 22, and multiple clamping parts 23. Each clamping part 23 is connected to the driving member 21 so that the driving member 21 drives the clamping part 23 to move radially and axially along the positioning member 22, thereby achieving the deformation and release of the O-ring 3. Therefore, it has the advantages of simple structure and high degree of automation.

[0041] Optionally, the clamping part 23 can be a rod-shaped clamping rod that extends along the axial direction of the positioning member 22, with one end of the rod-shaped clamping rod extending beyond the positioning member 22 to reserve space for gripping the O-ring 3.

[0042] like Figures 1 to 6 As shown, the positioning element 22 includes a positioning post 221 and a plurality of shaping rods 222, each shaping rod 222 being arranged circumferentially around one end of the positioning post 221 (e.g., Figure 1 (As shown in the lower end), a clearance portion 223 is formed between adjacent shaping rods 222, and the clamping portion 23 is provided in correspondence with the clearance portion 223 along the circumference of the positioning post 221.

[0043] The method for assembling the in-hole sealing ring and O-ring in this embodiment of the invention divides the positioning member 22 into positioning posts 221 and multiple shaping rods 222, and forms clearance portions 223 between adjacent shaping rods 222. The clamping portion 23 is correspondingly provided with the clearance portion 223. When the clamping portion 23 clamps the O-ring 3, the shaping rods 222 can position the O-ring 3, preventing the O-ring 3 from shifting or becoming excessively deformed.

[0044] Specifically, each shaping rod 222 is located at the end of the positioning post 221 away from the driving member 21. The thickness of the shaping rod 222 can be the same as the thickness of the O-ring 3.

[0045] like Figures 1 to 6 As shown, the positioning post 221 is provided with a plurality of positioning grooves 2211. The depth direction of the positioning grooves 2211 is arranged radially outward along the positioning post 221. The clamping part 23 is movably and correspondingly arranged in the positioning grooves 2211 along the depth direction of the positioning grooves 2211 (the depth direction of the positioning grooves 2211 is consistent with the radial direction of the positioning post 221).

[0046] The hole sealing retainer ring and O-ring assembly method of the embodiment of the present application, by positioning column 221 is provided with a plurality of positioning grooves 2211, and a plurality of clamping portions 23 are correspondingly arranged in the plurality of positioning grooves 2211, the movement of the clamping portion 23 can be guided. Thus, the clamping stability of the clamping portion 23 to the O-ring 3 is improved.

[0047] Specifically, the positioning groove 2211 extends along the axial direction of the positioning column 221.

[0048] As shown in Figures 1 to 6 The driving member 21 includes an operating portion 211, an axial driving portion (not shown) connected with the operating portion 211, and a plurality of radial driving portions 212 connected with the axial driving portion to drive the radial driving portions 212 to move along the axial direction of the clamping portion 23, and the plurality of radial driving portions 212 are movably connected with the plurality of clamping portions 23 along the radial direction of the positioning column 221.

[0049] The hole sealing retainer ring and O-ring assembly method of the embodiment of the present application, by dividing the driving member 21 into the operating portion 211, the axial driving portion, and the plurality of radial driving portions 212. Thus, the degree of automation is high.

[0050] Specifically, the plurality of radial driving portions 212 are close to each other along the radial direction of the clamping portion 23 to realize the clamping of the O-ring 3, then the driving member 21 clamping the O-ring 3 is controlled to move and extend into the assembly hole 11, the axial driving portion is controlled to move towards the direction close to the operating portion 211 (that is, the axial driving portion can drive the clamping portion 23 to move relative to the positioning column 221), and the O-ring 3 will be automatically released in the sealing ring groove 12 under the blocking of the positioning member 22 and the elastic state of the O-ring 3.

[0051] Optionally, the operating portion 211 can be connected with an external moving rod (not shown) to improve the convenience of clamping the O-ring 3. Thus, the degree of automation of the O-ring 3 assembly is further improved.

[0052] As shown in Figures 1 to 6 The length of the clamping portion 23 extending from one end of the positioning member 22 is greater than the thickness of the O-ring 3, and the length of the clamping portion 23 extending from one end of the positioning member 22 is less than the length of the sealing ring groove 12 minus the thickness of the retainer ring 5.

[0053] The hole sealing retainer ring and O-ring assembly method of the embodiment of the present application, by the length of the clamping portion 23 extending from one end of the positioning member 22 is greater than the thickness of the O-ring 3, and the length of the clamping portion 23 extending from one end of the positioning member 22 is less than the length of the sealing ring groove 12 minus the thickness of the retainer ring 5, which can improve the stability of the clamping of the O-ring 3, and avoid the problem that the O-ring 3 cannot be accurately released in the sealing ring groove 12 after being released due to the length of the clamping portion 23 extending too long.

[0054] As shown in Figures 1 to 6 The clamping portions 23 are three, and the three clamping portions 23 are uniformly arranged on the positioning member 22 along the circumference of the positioning member 22. It can be understood that the shaping rods 222, the positioning grooves 2211 and the radial driving portions 212 are three, and one end of the three shaping rods 222 can be connected at the center axis of the positioning column 221 to increase the stability of the overall structure.

[0055] The hole sealing retainer ring and O-ring assembly method of the embodiment of the present application is not limited to this, and in other embodiments, the clamping portions 23 are four, five or six.

[0056] As shown in Figure 7 Before assembly, the retainer ring 5 is first cut to form a cutout 51, and the retainer ring 5 with the cutout 51 is assembled into the assembly hole 11. In the related art, the retainer ring 5 is generally inclined when assembled in the hole, and the retainer ring 5 is pressed into the sealing ring groove 12 in the hole. In the hole sealing retainer ring and O-ring assembly method of the embodiment of the present application, the retainer ring 5 is shrunk by cutting the cutout 51. The shrunk retainer ring 5 O-ring 3 extends from both sides of the hole into the sealing groove in the hole, and the retainer ring 5 is first assembled into the groove. Then the O-ring 3 is assembled into the sealing ring groove 12, which can ensure the relative position of the retainer ring 5 and the O-ring 3 and prevent assembly errors such as overlapping. Therefore, the hole sealing retainer ring and O-ring assembly method has the advantage of further improving the convenience of assembling the retainer ring 5.

[0057] Optionally, the O-ring 3 is generally made of polyformaldehyde or polytetrafluoroethylene resin material, which is harder than the O-ring 3 made of rubber material and has the advantage of not being easily damaged under pressure.

[0058] The angle of the central angle corresponding to the cutout 51 is 30°-75°. In the hole sealing retainer ring and O-ring assembly method of the embodiment of the present application, the angle of the central angle corresponding to the cutout 51 is 30°-75°, which can avoid the problem of affecting the sealing performance due to the cutout 51 being too large, and also avoid the problem of not being easy to assemble due to the cutout 51 being too small.

[0059] As shown in Figure 7 The cutout 51 is an inclined cutout. Therefore, the assembled hole has the advantage of good sealing effect.

[0060] In the description of the application, it is to be understood that the orientations or positional relationships indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the application and simplifying the description, and do not indicate or imply that the devices or elements indicated thereby must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the application.

[0061] In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated thereby. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise explicitly specified and limited.

[0062] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected or in communication with each other; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication or interaction relationship of two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0063] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact between the first and second features through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0064] In this disclosure, the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" mean that a particular feature, structure, material, or characteristic is included in at least one embodiment or example of the present disclosure. The illustrative appearances of the above-mentioned terms in various places in the specification are not necessarily referred to the same embodiment or example. Moreover, the particular features, structures, materials, or characteristics can be combined in any suitable manner in one or more embodiments or examples. Furthermore, the terminology "comprising" is used in the disclosure as comprising but not limited to, that is, it is open-ended and does not exclude the presence of additional features, structures, materials, or characteristics.

[0065] Although the embodiments of the present disclosure have been shown and described above, it is understood that the above-described embodiments are exemplary, and are not to be interpreted as limiting the present disclosure, and the ordinary skilled in the art can make changes, modifications, replacements, and variations to the above-described embodiments within the scope of the present disclosure.

Claims

1. A method of assembling a bore sealing retainer ring, O-ring, characterized by, The method comprises the following steps: The sealing assembly to be assembled has an assembly hole with a first end and a second end arranged oppositely along the axial direction of the assembly hole, and a sealing ring groove is arranged at a position between the first end and the second end of the assembly hole; A retainer ring push rod is used to push the retainer ring into the sealing ring groove, the retainer ring is cut before assembly, the cut retainer ring is assembled into the assembly hole, the retainer ring is shrunk by cutting, the shrunk retainer ring and the O-ring extend into the sealing ring groove from both sides of the assembly hole, the retainer ring is assembled into the sealing ring groove first, and then the O-ring is assembled into the sealing ring groove; An O-ring shrinking mechanism is used to deform the O-ring to reduce the outer diameter of the O-ring, and the deformed O-ring is placed into the position of the sealing ring groove by the O-ring shrinking mechanism, the O-ring is released, the O-ring is naturally and elastically expanded in the sealing ring groove, and the retainer ring push rod and the O-ring shrinking mechanism are withdrawn to achieve the assembly of the retainer ring and the O-ring; The O-ring shrinking mechanism comprises a driving member, a positioning member and a plurality of clamping portions, the plurality of clamping portions are arranged on the positioning member in a circumferential direction of the positioning member, each clamping portion is connected to the driving member so as to drive the clamping portion to move along the radial direction and the axial direction of the positioning member by the driving member to deform and release the O-ring, the positioning member comprises a positioning column and a plurality of shape rods, each shape rod is arranged at one end of the positioning column in a divergent manner along the circumferential direction of the positioning column, an avoiding portion is formed between adjacent shape rods, and the clamping portions are arranged in the avoiding portions in the circumferential direction of the positioning column; the length of the clamping portion extending from one end of the positioning member is greater than the thickness of the O-ring, and the length of the clamping portion extending from one end of the positioning member is less than the length of the sealing ring groove minus the thickness of the retainer ring.

2. The bore sealing retainer ring, O-ring assembly method of claim 1, wherein, The O-ring shrinking mechanism drives the O-ring to deform along the radial direction.

3. The bore sealing retainer ring, O-ring assembly method of claim 1, wherein, The positioning column is provided with a plurality of positioning grooves, the positioning grooves are arranged in a divergent manner along the radial direction of the positioning column, and the clamping portions are movably and one-to-one arranged in the positioning grooves along the depth direction of the positioning grooves.

4. The bore sealing retainer ring, O-ring assembly method of claim 1, wherein, The driving member comprises an operating portion, an axial driving portion and a plurality of radial driving portions, the axial driving portion is connected to the operating portion, the plurality of radial driving portions are connected to the axial driving portion to drive the radial driving portions to move along the axial direction of the clamping portions, and the plurality of radial driving portions are movably connected to the plurality of clamping portions in the radial direction of the positioning column.

5. The bore sealing retainer ring, O-ring assembly method of claim 3, wherein, The clamping portions are three, and the three clamping portions are uniformly arranged on the positioning member in the circumferential direction of the positioning member.

6. A method of assembling a bore sealing retainer ring, O-ring according to any one of claims 1 to 4, characterised in that, The angle of the central angle corresponding to the cutout is 30°-75°; And / or, the cutout is a bevel cutout.

Images