O-ring, retainer ring assembly device and assembly method

Abstract

The application relates to an assembly device and an assembly method for an O-ring and a check ring in a hole. The assembly device for the O-ring and the check ring in the hole comprises a mounting table, a pressing assembly and a first displacement assembly. The mounting table is used for placing a to-be-assembled part. The mounting table is provided with a positioning column which is matched in a first end of an assembly hole. The positioning column has a positioning surface which is located on the same plane as one side surface of a ring groove in a first direction. The pressing assembly is used for extending into the assembly hole to make the compressed check ring and the compressed O-ring move to the ring groove in sequence. The first displacement assembly is connected with the pressing assembly to drive the pressing assembly to move in the first direction. The assembly device realizes the assembly of the check ring and the O-ring through a set of components (that is, the first displacement assembly and the pressing assembly), guarantees the assembly position relationship of the check ring and the O-ring, has high product yield, high assembly efficiency, and avoids the problems of wrong assembly and missing assembly of the check ring and the O-ring caused by manual assembly.

Description

Technical Field

[0001] This invention relates to the field of sealing technology, and in particular to an assembly device and method for an internal O-ring and retaining ring. Background Technology

[0002] In related technologies, the assembly of O-rings and retaining rings in their inner grooves is mainly done manually, which is difficult and inefficient. During manual assembly, the assembly positions of the retaining ring and O-ring are uncertain, the installation sequence is easily reversed, the yield rate is low, and the retaining ring may deform and become unusable after repair, increasing economic costs. Some related technologies allow for automated assembly of O-rings in their inner grooves. This is achieved by using grippers to deform the O-ring, causing it to indent inwards. After moving the O-ring into the sealing groove, the grippers are removed, and the O-ring returns to its original shape, completing the assembly. However, because the retaining ring is made of a harder material, it cannot undergo the same deformation as the O-ring, and the retaining ring's cut has a defined direction, making it impossible to use the same gripper structure to assemble the retaining ring and the inner groove. Summary of the Invention

[0003] This invention aims to at least partially solve one of the technical problems in related technologies. To this end, embodiments of this invention propose an assembly device for in-hole O-rings and retaining rings, enabling the assembly of retaining rings and O-rings through a set of components (i.e., a first displacement component and a pressing component). This ensures the positional relationship between the retaining rings and O-rings, resulting in a high yield rate and high assembly efficiency, avoiding problems such as incorrect or missing retaining rings and O-rings caused by manual assembly. Furthermore, during the assembly process, there is no tensioning process for the retaining rings and O-rings, ensuring that their quality is not damaged.

[0004] The embodiments of the present invention provide a method for assembling an O-ring and a retaining ring inside a hole.

[0005] The assembly device for the O-ring and retaining ring inside the hole according to an embodiment of the present invention includes:

[0006] The mounting platform is used to place the parts to be assembled. The parts to be assembled have an assembly hole extending along a first direction. The assembly hole has a first end and a second end in the first direction. The assembly hole has an annular groove. The mounting platform has a positioning post. The positioning post is fitted into the first end of the assembly hole. The positioning post has a positioning surface at one end of the assembly hole in the first direction. The positioning surface and one side of the annular groove in the first direction are on the same plane.

[0007] A press-fitting component, movably disposed in a first direction, the press-fitting component being opposite to the positioning post in the first direction, the press-fitting component being used to extend into the assembly hole to move the compressed retaining ring and the compressed O-ring sequentially to the annular groove; and

[0008] A first displacement component is connected to the press-fitting member to drive the press-fitting member to move in the first direction.

[0009] The assembly device for in-hole O-rings and retaining rings in this embodiment of the invention enables the assembly of retaining rings and O-rings through a set of components (i.e., the first displacement component and the press-fit component), ensuring the positional relationship of the retaining rings and O-rings during assembly. This results in a high yield rate, high assembly efficiency, and avoids problems such as incorrect or missing retaining rings and O-rings caused by manual assembly. Furthermore, there is no tensioning process for the retaining rings and O-rings during assembly, ensuring that their quality is not damaged.

[0010] In some embodiments, the press-fit component includes:

[0011] Multiple pressure heads, wherein the multiple pressure heads are distributed in a circumferential ring along the positioning post; and

[0012] Multiple connecting rods, each of which corresponds to a pressure head, with one end of each connecting rod connected to one end of the pressure head in the first direction;

[0013] There are multiple first displacement components, and each of the multiple first displacement components corresponds to one of the multiple connecting rods. The first displacement component is connected to the other end of the connecting rod.

[0014] In some embodiments, the pressure head has an arcuate surface located on the outer side of the pressure head.

[0015] In some embodiments, a connecting post is further included, the connecting post being connected to the mounting platform, and the connecting post having a plurality of mounting holes arranged circumferentially along the positioning post.

[0016] The first displacement component includes:

[0017] A rotary compressor cylinder, wherein the rotary compressor cylinder is mounted on the connecting column, and the rotary compressor cylinder has a working end; and

[0018] A guide shaft is provided in the mounting hole. One end of the guide shaft in the first direction is connected to the other end of the connecting rod. The other end of the guide shaft in the first direction is opposite to the working end of the rotary compression cylinder after it has been rotated to the position so that the working end can drive the guide shaft to move in the direction of the positioning surface.

[0019] An elastic element is provided on the connecting column and is connected to the guide shaft.

[0020] In some embodiments, the elastic element is a compression spring, which is located within the mounting hole and sleeved on the guide shaft.

[0021] In some embodiments, the connecting rod is provided with an adjustment hole, one end of the guide shaft is provided with a threaded hole, the connecting hole is opposite to a portion of the adjustment hole, and the connecting rod and one end of the guide shaft are connected by a screw passing through the adjustment hole and engaging in the connecting hole.

[0022] In some embodiments, the assembly device for the O-ring and retaining ring inside the hole further includes:

[0023] A guide cylinder is positioned opposite the mounting platform in the first direction. The guide cylinder is movably disposed in the first direction and has a guiding position and a disengaging position. When the guide cylinder is in the guiding position, one side of the guide cylinder adjacent to the mounting platform in the first direction is on the same plane as the other side of the annular groove in the first direction. When the guide cylinder is in the disengaging position, the guide cylinder is spaced apart from the assembly.

[0024] A second displacement component is connected to the guide cylinder to move the guide cylinder between the guide position and the disengagement position.

[0025] In some embodiments, the assembly device for the O-ring and retaining ring in the hole further includes a third displacement component, which is disposed on the second displacement component so that the second displacement component drives the third displacement component to move synchronously with the guide cylinder. The third displacement component is connected to each of the press-fit component and the first displacement component to drive the press-fit component and the first displacement component to move synchronously.

[0026] The assembly method of the O-ring and retaining ring inside the hole according to an embodiment of the present invention includes the following steps:

[0027] The part to be assembled is provided with an assembly hole extending along a first direction, the assembly hole having a first end and a second end in the first direction, and an annular groove provided on the assembly hole;

[0028] Step A: Place the part to be assembled on the mounting table. The mounting table is provided with a positioning post. The positioning post fits into the first end of the assembly hole. The positioning post has a positioning surface at one end of the assembly hole in the first direction. The positioning surface and one side of the annular groove in the first direction are on the same plane.

[0029] Step B: The compressed retaining ring is placed at an angle in the second end of the assembly hole. The first displacement component drives the pressing component to extend into the assembly hole to push the compressed retaining ring towards the positioning surface. When the retaining ring is opposite to the annular groove in the radial direction of the mounting platform, the retaining ring naturally opens in the annular groove, thus completing the assembly of the retaining ring. Then, the first displacement component drives the pressing component to exit the assembly hole.

[0030] Step C: The compressed O-ring is placed at an angle inside the second end of the assembly hole. The first displacement component drives the pressing component to extend into the assembly hole to push the compressed O-ring towards the positioning surface. When the O-ring is radially opposite to the annular groove on the mounting platform, the O-ring naturally opens in the annular groove, thus completing the assembly of the O-ring. Then, the first displacement component drives the pressing component to exit the assembly hole.

[0031] The assembly method for O-rings and retaining rings within holes according to this invention enables the assembly of retaining rings and O-rings using a set of components (i.e., the first displacement component and the press-fitting component). This ensures the proper positional relationship between the retaining rings and O-rings, resulting in a high yield rate and high assembly efficiency. It also avoids problems such as incorrect or missing retaining rings and O-rings caused by manual assembly. Furthermore, there is no tensioning process for the retaining rings and O-rings during assembly, ensuring that their quality is not compromised.

[0032] In some embodiments, in step B, the second displacement component drives the guide cylinder to engage with the assembly hole, so that one side of the guide cylinder adjacent to the mounting platform in the first direction and the other side of the annular groove in the first direction are on the same plane. Then, the compressed retaining ring is placed in the guide cylinder, and the first displacement component pushes the retaining ring to move through the press-fit component.

[0033] In step C, the compressed O-ring is placed into the guide cylinder, and then the first displacement component pushes the O-ring to move through the press-fit component. After the O-ring is assembled, the second displacement component drives the guide cylinder to disengage from the assembly hole. Attached Figure Description

[0034] Figure 1 This is one of the structural schematic diagrams of the assembly device for the O-ring and retaining ring inside the hole according to an embodiment of the present invention;

[0035] Figure 2 This is a second schematic diagram of the assembly device for the O-ring and retaining ring inside the hole according to an embodiment of the present invention;

[0036] Figure 3 This is a schematic diagram of the structure of the press-fit component, the first displacement assembly, and the connecting column according to an embodiment of the present invention;

[0037] Figure 4 This is a cross-sectional structural diagram of the press-fit component, the first displacement component, and the connecting column according to an embodiment of the present invention.

[0038] Figure label:

[0039] Assembly device 100 for O-rings and retaining rings;

[0040] Mounting platform 1, positioning column 11, positioning surface 111;

[0041] Press-fit component 2, press head 21, arc surface 211, connecting rod 22, adjusting hole 221;

[0042] First displacement component 3, rotary compression cylinder 31, working end 311, guide shaft 32, elastic element 33;

[0043] Connecting post 4;

[0044] Guide cylinder 5, guide hole 51;

[0045] Second displacement component 6, mounting base 61, first telescopic component 62, first mounting plate 63, first guide rail 64, first slider 65;

[0046] The third displacement component 7, the second telescopic component 71, the second guide rail 72, and the second slider 73. Detailed Implementation

[0047] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0048] The following is for reference. Figures 1 to 4 This invention describes the assembly device 100 and assembly method for the O-ring and retaining ring inside the hole according to an embodiment of the present invention.

[0049] The assembly device 100 for the O-ring and retaining ring in the hole according to an embodiment of the present invention includes a mounting platform 1, a pressing component 2, and a first displacement component 3.

[0050] Mounting platform 1 is used to place the part to be assembled, the part to be assembled having a first direction (e.g., along the first direction). Figure 1 The mounting hole extends in the vertical direction, and the axial direction of the mounting hole is parallel to the first direction. The mounting hole has a first end and a second end in the first direction. An annular groove is provided on the mounting hole. A positioning post 11 is provided on the mounting platform 1. The positioning post 11 fits in the first end of the mounting hole. The positioning post 11 has a positioning surface 111 at one end of the mounting hole in the first direction. The positioning surface 111 and one side of the annular groove in the first direction are located on the same plane. The positioning surface 111 limits the movement of the retaining ring and the O-ring in the mounting hole.

[0051] The press-fitting component 2 is movably disposed in the first direction, and is opposite to the positioning post 11 in the first direction. The press-fitting component 2 is used to extend into the assembly hole so that the compressed retaining ring and the compressed O-ring move sequentially to be opposite to the annular groove in the radial direction of the mounting platform 1. The first displacement assembly 3 is connected to the press-fitting component 2 to drive the press-fitting component 2 to move in the first direction.

[0052] The following describes the assembly method of the in-hole sealing ring and O-ring according to an embodiment of the present invention.

[0053] The assembly method of the O-ring and retaining ring inside the hole according to an embodiment of the present invention includes the following steps:

[0054] Step A: Place the part to be assembled on the mounting platform 1. The mounting platform 1 is provided with a positioning post 11. The positioning post 11 fits into the first end of the assembly hole. The positioning post 11 has a positioning surface 111 at the end of the assembly hole in the first direction. The positioning surface 111 and one side of the annular groove in the first direction are on the same plane.

[0055] Step B: The compressed retaining ring is placed at an angle inside the second end of the assembly hole. The retaining ring is a retaining ring with a notch so that it can be compressed and placed into the assembly hole. The first displacement component 3 drives the pressing component 2 to extend into the assembly hole to push the compressed retaining ring towards the positioning surface 111. When the retaining ring is radially opposite to the annular groove on the mounting platform 1, the retaining ring naturally opens in the annular groove. That is, the retaining ring expands radially in the annular groove and returns to its natural shape, thus completing the assembly of the retaining ring. Then the first displacement component 3 drives the pressing component 2 to exit the assembly hole.

[0056] Step C: The compressed O-ring is placed at an angle inside the second end of the assembly hole. The first displacement component 3 drives the pressing component 2 to extend into the assembly hole to push the compressed O-ring towards the positioning surface 111. When the O-ring is radially opposite to the annular groove on the mounting platform 1, the O-ring naturally opens in the annular groove. That is, the O-ring expands radially and returns to its natural shape in the annular groove, thus completing the assembly of the O-ring. Then, the first displacement component 3 drives the pressing component 2 out of the assembly hole.

[0057] In this embodiment of the invention, the assembly method of the O-ring and retaining ring in the hole is achieved by using a positioning pin 11 to seal the first end of the assembly hole. This allows the pressing component 2 to push the retaining ring and O-ring within the assembly hole, thus limiting their movement. Furthermore, the positioning surface 111 of the positioning pin 11 and one side of the annular groove in the first direction are located on the same plane. This allows the pressing component 2 to push the compressed retaining ring to the position of the annular groove, after which the retaining ring naturally opens and assembles within the annular groove. Similarly, after the pressing component 2 pushes the compressed O-ring to the position of the annular groove, the O-ring naturally opens and assembles within the remaining space of the annular groove (i.e., the space of the annular groove not occupied by the retaining ring).

[0058] Furthermore, since the retaining ring is installed first and the O-ring is installed later, the first end of the mounting hole is located below the second end. Therefore, in step B, the retaining ring naturally falls onto one side of the annular groove (that is, the lower side of the annular groove). In step C, the O-ring is assembled in the upper space of the annular groove, and the O-ring abuts against the other side of the annular groove (that is, the upper side of the annular groove).

[0059] The assembly method for O-rings and retaining rings in this invention utilizes the compressibility of the retaining ring and the O-ring itself. The positioning surface 111 of the assembly device 100 limits the movement of the retaining ring and O-ring. The first displacement component 3 and the pressing component 2 of the assembly device 100 sequentially push the compressed retaining ring and O-ring towards the annular groove in a first direction, causing them to be pushed to the groove and naturally open, thus assembling them sequentially. This achieves assembly of the retaining ring and O-ring using only one set of components (i.e., the first displacement component 3 and the pressing component 2), ensuring the correct assembly position of the retaining ring and O-ring, resulting in a high yield rate and high assembly efficiency. It avoids problems such as incorrect or missing retaining rings and O-rings caused by manual assembly. Furthermore, there is no tensioning process during assembly, ensuring that the quality of the retaining ring and O-ring remains undamaged.

[0060] To make the scheme of this application easier to understand, we will take the example where the first direction and the up and down directions are the same, where the up and down directions are as follows: Figures 1 to 4 As shown, the left and right directions are as follows Figure 1 , Figure 2 and Figure 4 As shown, the front and back directions are as follows Figures 1 to 2 As shown.

[0061] The assembly device 100 for the O-ring and retaining ring in the hole according to an embodiment of the present invention includes a mounting platform 1, a pressing component 2, a first displacement component 3, a connecting column 4, a guide cylinder 5, a second displacement component 6, and a third displacement component 7.

[0062] Mounting platform 1 is used to place the part to be assembled, the part to be assembled having a first direction (e.g., along the first direction). Figure 1 The mounting hole extends in the vertical direction, and the axis of the mounting hole is parallel to the first direction. The mounting hole has a first end (lower end) and a second end (upper end) in the first direction. The mounting hole is provided with an annular groove. The mounting platform 1 is provided with a positioning post 11. The positioning post 11 fits in the first end of the mounting hole. The positioning post 11 has a positioning surface 111 at one end (upper end) of the mounting hole in the first direction. The positioning surface 111 and one side (lower side) of the annular groove in the first direction are on the same plane. Therefore, the positioning surface 111 and the side of the annular groove are at the same height. The positioning surface 111 limits the movement of the retaining ring and the O-ring in the mounting hole.

[0063] The press-fitting component 2 is movably disposed in the first direction, and is opposite to the positioning post 11 in the first direction. The press-fitting component 2 is used to extend into the assembly hole so that the compressed retaining ring and the compressed O-ring move sequentially to be opposite to the annular groove in the radial direction of the mounting platform 1. The first displacement assembly 3 is connected to the press-fitting component 2 to drive the press-fitting component 2 to move in the first direction.

[0064] In some embodiments, the press-fit component 2 includes a plurality of press heads 21 and a plurality of connecting rods 22. The plurality of press heads 21 are distributed in a ring around the circumference of the positioning post 11, with the center of the ring distribution on the extension line of the axis of the mounting platform 1. The plurality of press heads 21 form the press-fit portion of the press-fit component 2 for abutting the retaining ring and O-ring. The plurality of connecting rods 22 correspond one-to-one with the plurality of press heads 21, and one end (lower end) of the connecting rod 22 is connected to one end (upper end) of the press head 21 in the first direction. The number of first displacement components 3 is plurality of, and the plurality of first displacement components 3 correspond one-to-one with the plurality of connecting rods 22. The first displacement components 3 are connected to the other end (upper end) of the connecting rods 22.

[0065] Multiple first displacement components 3 can drive multiple pressure heads 21 to move respectively in the first direction, so that the multiple pressure heads 21 of the press-fit component 2 can move separately. In step C, when the O-ring is radially opposite to the annular groove on the mounting platform 1, one first displacement component 3 drives the corresponding pressure head 21 to move first towards the second end of the assembly hole, and then towards the O-ring, pushing the part of the O-ring opposite the pressure head 21 towards the annular groove, pushing that part of the O-ring into the annular groove. Multiple first displacement components 3 sequentially drive multiple pressure heads 21 to repeat the above action, sequentially pushing the part of the O-ring opposite different pressure heads 21 into the annular groove, thereby ensuring the assembly effect of the O-ring in the annular groove.

[0066] Since the multiple pressure heads 21 are distributed in a ring, the side of the pressure head 21 closest to the center of the ring distribution is the inner side, and the side of the pressure head 21 furthest from the center of the ring distribution is the outer side. In some embodiments, the pressure head 21 is provided with an arc-shaped surface 211, which is located on the outer side of the pressure head 21. Thus, the outer surface of the pressing part of the pressing component 2 formed by the multiple pressure heads 21 is an arc-shaped surface, so that the outer peripheral dimension of the pressing part can better match the size of the assembly hole. This ensures the contact and pushing effect of the pressing part (multiple pressure heads 21) on the retaining ring and O-ring, and avoids damage to the retaining ring and O-ring by the multiple pressure heads 21 during the process of the pressing component 2 pushing the retaining ring and O-ring to move. It also avoids damage to the assembly hole.

[0067] The connecting column 4 is connected to the mounting platform 1, and the connecting column 4 has multiple mounting holes arranged in a ring around the circumference of the positioning column 11. The first displacement assembly 3 includes a rotary compression cylinder 31, a guide shaft 32, and an elastic element 33. The multiple first displacement assemblies 3 and the multiple mounting holes correspond one-to-one.

[0068] A rotary compression cylinder 31 is mounted on the connecting column 4. The rotary compression cylinder 31 has a working end 311, which performs a rotation followed by compression operation. The structure of the rotary compression cylinder 31 is existing technology and will not be described in detail here. A guide shaft 32 is mounted in the mounting hole. One end (lower end) of the guide shaft 32 in the first direction is connected to the other end of the connecting rod 22. The other end (upper end) of the guide shaft 32 in the first direction is opposite to the working end 311 of the rotary compression cylinder 31 after rotation to the correct position, so that the working end drives the guide shaft 32 to move towards the positioning surface 111. An elastic element 33 is mounted on the connecting column 4 and is connected to the guide shaft 32.

[0069] When the rotary compressor cylinder 31 is activated, the working end 311 rotates to face the guide shaft 32 in the first direction. Then, the working end 311 compresses, thereby driving the guide shaft 32 to move towards the positioning surface 111, which in turn drives the press-fit component 2 to move towards the positioning surface 111, thereby pushing the retaining ring and O-ring to move. During this process, the elastic element 33 accumulates elastic force under pressure. When the rotary compressor cylinder 31 is closed, the working end 311 of the rotary compressor cylinder 31 moves away from the positioning surface 111, and then rotates back to its original position. The working end 311 disengages from the guide shaft 32, and the guide shaft 32 moves away from the positioning surface 111 under the elastic force of the elastic element 33, thereby driving the press-fit component 2 to disengage from the assembly hole.

[0070] The first displacement assembly 3 uses a rotary compression cylinder 31 and an elastic element 33 to move the press-fitting part 2 in the first direction. Compared with the first displacement assembly 3 using a linear telescopic device (such as a linear cylinder), it is easier to assemble and arrange multiple first displacement assemblies 3 with the connecting column 4, and can save the space occupied by multiple first displacement assemblies 3 in the first direction.

[0071] Furthermore, the cooperation between the guide shaft 32 and the mounting hole of the connecting column 4 guides the movement of the guide shaft 32, ensuring that the movement of the pressure head 21 in the first direction will not deviate and that the pressure head 21 will not scrape the inner wall of the assembly hole.

[0072] In some embodiments, the elastic element 33 is a compression spring, located within the mounting hole of the connecting post 4, and sleeved on the guide shaft 32. The lower end of the compression spring is connected to the connecting post 4, and the upper end is connected to the guide shaft 32. The compression spring is a helical spring that withstands axial pressure. The compression spring has a simple structure and is easy to install. Sleeved on the guide shaft 32, its deformation is regular and it is not prone to deflection, ensuring the return motion of the guide shaft 32 and guaranteeing that the press-fit component 2 can smoothly exit from the mounting hole.

[0073] In some embodiments, the connecting rod 22 is provided with an adjustment hole 221, one end of the guide shaft 32 is provided with a threaded hole, a connecting hole is opposite to a portion of the adjustment hole 221, and one end of the connecting rod 22 and the guide shaft 32 are connected by a screw passing through the adjustment hole 221 and engaging in the connecting hole.

[0074] A portion of the adjusting hole 221 is opposite to the connecting hole, making the portion of the adjusting hole 221 opposite to the connecting hole adjustable. This allows the connection position of the connecting rod 22 and the guide shaft 32 to be adjusted, thereby adjusting the position of the pressure head 21, adjusting the distance of multiple pressure heads 21 from the center of their annular distribution, and adjusting the size of the pressing part, so that the pressing part 2 can adapt to assembly holes and annular grooves of different diameters.

[0075] Specifically, the adjustment hole 221 is an oblong hole.

[0076] In such Figure 3 In the example shown, there are four pressure heads 21, which are arranged in a ring to form a circular pressing part.

[0077] The guide cylinder 5 is opposite to the mounting platform 1 in the first direction. The guide cylinder 5 is movably disposed in the first direction and has a guiding position and a disengaged position. When the guide cylinder 5 is in the guiding position, one side (lower side) of the guide cylinder 5 adjacent to the mounting platform 1 in the first direction and the other side (upper side) of the annular groove in the first direction are on the same plane. When the guide cylinder 5 is in the disengaged position, the guide cylinder 5 is spaced apart from the assembly. The second displacement assembly 6 is connected to the guide cylinder 5 to drive the guide cylinder 5 to move between the guiding position and the disengaged position.

[0078] The guide cylinder 5 has a guide hole 51 extending along the first direction. When the assembly hole of the part to be assembled is a stepped hole, the second displacement component 6 drives the guide cylinder 5 to move to the guide position. The guide hole of the guide cylinder 5 replaces the assembly hole to guide and radially limit the movement of the retaining ring and O-ring. The guide hole 51 is adapted to the multiple pressure heads 21 (pressing parts) of the press-fitting component 2. The press-fitting component 2 can push the compressed retaining ring and compressed O-ring to move within the guide hole 51.

[0079] In step B, the second displacement component 6 drives the guide cylinder 5 to engage with the assembly hole, so that the side (lower side) of the guide cylinder 5 adjacent to the mounting platform 1 in the first direction is on the same plane as the other side of the annular groove in the first direction. Then, the compressed retaining ring is placed in the guide cylinder 5, and the first displacement component 3 pushes the retaining ring to move through the pressing component 2. In step C, the compressed O-ring is placed in the guide cylinder 5, and then the first displacement component 3 pushes the O-ring to move through the pressing component 2. After the O-ring assembly is completed, the second displacement component 6 drives the guide cylinder 5 to disengage from the assembly hole.

[0080] Specifically, the second displacement assembly 6 includes a mounting base 61, a first telescopic member 62, a first mounting plate 63, a first guide rail 64, and a first slider 65. The mounting base 61 is disposed on the mounting platform 1, the first telescopic member 62 is disposed on the mounting base 61, the first telescopic member 62 has a first telescopic end, the first mounting plate 63 is disposed on the first telescopic end, and the guide cylinder 5 is disposed on the first mounting plate 63. When the first telescopic member 62 is in operation, the first telescopic end extends or retracts, thereby driving the first mounting plate 63 to move in the first direction, and subsequently driving the guide cylinder 5 to move in the first direction.

[0081] The first guide rail 64 is mounted on the mounting base 61, and the first slider 65 is mounted on the first mounting plate 63. The first slider 65 has a first sliding groove, and the first guide rail 64 fits into the first sliding groove. The first guide rail 64 and the first slider 65 are slidably connected to guide the movement of the guide cylinder 5, ensuring the accuracy of the movement of the guide cylinder 5 and preventing the movement of the guide cylinder 5 from deviating.

[0082] Specifically, the first telescopic component 62 is a linear cylinder.

[0083] In some embodiments, each of the first displacement component 3 and the pressing component 2 is disposed on the first mounting plate 63, such that the second displacement component 6 can simultaneously drive the guide cylinder 5 and the pressing component 2 toward the part to be assembled, thereby reducing the amount of displacement of the pressing component 2 driven by the first displacement component 3 and simplifying the structure of the assembly device 100.

[0084] Furthermore, the third displacement component 7 is mounted on the second displacement component 6 so that the second displacement component 6 drives the third displacement component 7 to move synchronously with the guide cylinder 5. The third displacement component 7 is connected to each of the pressing component 2 and the first displacement component 3 to drive the synchronous movement of the pressing component 2 and the first displacement component 3. The third displacement component 7 further reduces the displacement of the first displacement component 3, so that the first displacement component 3 drives the pressing component 2 to push the compressed retaining ring and compressed O-ring in the guide hole or assembly hole to move, so that the working process of the first displacement component 3, the second displacement component 6 and the third displacement component 7 is reasonably distributed.

[0085] Specifically, the third displacement component 7 is mounted on the first mounting plate 63 of the second displacement component 6.

[0086] Furthermore, the third displacement assembly 7 includes a second telescopic member 71, a second guide rail 72, and a second slider 73. The second telescopic member 71 is mounted on the first mounting plate 63, the second guide rail 72 is mounted on the first mounting plate 63, and the second slider 73 is mounted on the connecting post 4. The second slider 73 has a second sliding groove, and the second guide rail 72 fits into the second sliding groove. The second guide rail 72 and the second slider 73 are slidably connected to guide the movement of the first displacement assembly 3 and the pressing component 2, ensuring the accuracy of the movement of the pressing component 2 and ensuring that the pressing component 2 is aligned with the positioning surface 111.

[0087] Specifically, the second telescopic component 71 is a linear cylinder.

[0088] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0089] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0090] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0091] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0092] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0093] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. An assembly device for an internal O-ring and a retaining ring, characterized in that, include: Mounting platform (1), the mounting platform (1) is used to place the parts to be assembled, the parts to be assembled are provided with an assembly hole extending along a first direction, the assembly hole has a first end and a second end in the first direction, the assembly hole is provided with an annular groove, the mounting platform (1) is provided with a positioning post (11), the positioning post (11) is fitted in the first end of the assembly hole, the positioning post (11) has a positioning surface (111) at one end of the assembly hole in the first direction, the positioning surface (111) and one side of the annular groove in the first direction are located on the same plane; A press-fitting component (2) is movably disposed in a first direction and is opposite to the positioning post (11) in the first direction. The press-fitting component (2) is used to extend into the assembly hole so that the compressed retaining ring and the compressed O-ring move sequentially to the annular groove. The press-fitting component (2) includes: Multiple pressure heads (21) are arranged in a ring around the circumference of the positioning post (11); and Multiple connecting rods (22), each of which corresponds one-to-one with a plurality of pressure heads (21), with one end of each connecting rod (22) connected to one end of each pressure head (21) in the first direction; and A first displacement component (3) is connected to the press-fit component (2) to drive the press-fit component (2) to move in the first direction; There are multiple first displacement components (3), and each of the multiple first displacement components (3) corresponds to one of the multiple connecting rods (22). The first displacement component (3) is connected to the other end of the connecting rod (22).

2. The assembly device for the O-ring and retaining ring inside the hole according to claim 1, characterized in that, The pressure head (21) has an arc-shaped surface (211), which is located on the outside of the pressure head (21).

3. The assembly device for the O-ring and retaining ring inside the hole according to claim 1, characterized in that, It further includes a connecting column (4), which is connected to the mounting platform (1), and the connecting column (4) is provided with a plurality of mounting holes in a ring around the circumference of the positioning column (11); The first displacement component (3) includes: A rotary compressor cylinder (31), the rotary compressor cylinder (31) being mounted on the connecting column (4), the rotary compressor cylinder (31) having a working end; and A guide shaft (32) is provided in the mounting hole. One end of the guide shaft (32) in the first direction is connected to the other end of the connecting rod (22). The other end of the guide shaft (32) in the first direction is opposite to the working end of the rotary compression cylinder (31) after it has been rotated to the position so that the working end can drive the guide shaft (32) to move towards the positioning surface (111). An elastic element (33) is provided on the connecting column (4) and is connected to the guide shaft (32).

4. The assembly device for the O-ring and retaining ring inside the hole according to claim 3, characterized in that, The elastic element (33) is a compression spring, which is located in the mounting hole and is sleeved on the guide shaft (32).

5. The assembly device for the O-ring and retaining ring inside the hole according to claim 3, characterized in that, The connecting rod (22) is provided with an adjustment hole (221), and one end of the guide shaft (32) is provided with a threaded hole. The threaded hole is opposite to a part of the adjustment hole (221). The connecting rod (22) and one end of the guide shaft (32) are connected by a screw passing through the adjustment hole (221) and engaging in the threaded hole.

6. The assembly device for the O-ring and retaining ring inside the hole according to claim 1, characterized in that, Further includes: A guide cylinder (5) is opposite to the mounting platform (1) in the first direction. The guide cylinder (5) is movably disposed in the first direction and has a guiding position and a disengaging position. When the guide cylinder (5) is in the guiding position, one side of the guide cylinder (5) adjacent to the mounting platform (1) in the first direction is on the same plane as the other side of the annular groove in the first direction. When the guide cylinder (5) is in the disengaging position, the guide cylinder (5) is spaced apart from the part to be installed. The second displacement component (6) is connected to the guide cylinder (5) to drive the guide cylinder (5) to move between the guide position and the disengagement position.

7. The assembly device for the O-ring and retaining ring inside the hole according to claim 6, characterized in that, It further includes a third displacement component (7), which is disposed on the second displacement component (6) so that the second displacement component (6) drives the third displacement component (7) to move synchronously with the guide cylinder (5). The third displacement component (7) is connected to each of the press-fit component (2) and the first displacement component (3) to drive the synchronous movement of the press-fit component (2) and the first displacement component (3).

8. A method for assembling an O-ring and a retaining ring inside a hole, using the assembly device for an O-ring and a retaining ring inside a hole as described in any one of claims 1-7, characterized in that, Includes the following steps: The part to be assembled is provided with an assembly hole extending along a first direction, the assembly hole having a first end and a second end in the first direction, and an annular groove provided on the assembly hole; Step A: Place the part to be assembled on the mounting platform (1). The mounting platform (1) is provided with a positioning post (11). The positioning post (11) fits into the first end of the assembly hole. The positioning post (11) has a positioning surface (111) at one end of the assembly hole in the first direction. The positioning surface (111) and one side of the annular groove in the first direction are on the same plane. Step B: The compressed retaining ring is placed at an angle in the second end of the assembly hole. The first displacement component (3) drives the pressing component (2) to extend into the assembly hole to push the compressed retaining ring towards the positioning surface (111). When the retaining ring is opposite to the annular groove in the radial direction of the mounting platform (1), the retaining ring naturally opens in the annular groove, thus completing the assembly of the retaining ring. Then the first displacement component (3) drives the pressing component (2) to exit the assembly hole. Step C: The compressed O-ring is placed at an angle in the second end of the assembly hole. The first displacement component (3) drives the press-fitting component (2) to extend into the assembly hole to push the compressed O-ring toward the positioning surface (111). When the O-ring is opposite to the annular groove in the radial direction of the mounting platform (1), the O-ring naturally opens in the annular groove, thus completing the assembly of the O-ring. Then the first displacement component (3) drives the press-fitting component (2) to exit the assembly hole.

9. The assembly method of the O-ring and retaining ring according to claim 8, characterized in that, In step B, the second displacement component (6) drives the guide cylinder (5) to fit into the assembly hole, so that the side of the guide cylinder (5) adjacent to the mounting platform (1) in the first direction and the other side of the annular groove in the first direction are on the same plane. Then, the compressed retaining ring is placed in the guide cylinder (5), and the first displacement component (3) pushes the retaining ring to move through the press-fitting component (2). In step C, the compressed O-ring is placed into the guide cylinder (5), and then the first displacement component (3) pushes the O-ring to move through the press-fit component (2). After the assembly of the O-ring is completed, the second displacement component (6) drives the guide cylinder (5) to disengage from the assembly hole.

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