O-ring running prevention lens ring tightening tool and use method

Abstract

The application discloses a lens ring pressing and tightening tool for preventing O-shaped ring from running out and a use method, the tightening tool comprises a tightening sleeve shell for providing a rotating torque by cooperating with a ring pressing end face, and an O-shaped ring guide column arranged in the tightening sleeve shell and used for limiting the O-shaped ring in the lens, the lower end of the O-shaped ring guide column is located at the inner periphery of the O-shaped ring, the O-shaped ring guide column provides radial support for the O-shaped ring, and the lower end face shape of the O-shaped ring guide column is matched with the lens end face shape at the position of the O-shaped ring; the upper end face of the O-shaped ring guide column is provided with an elastic pressing mechanism for providing pressure for the O-shaped ring guide column when the ring pressing and tightening is performed through the tightening sleeve shell; the ring pressing and tightening tool of the application is provided with the O-shaped ring guide column, the O-shaped ring can be provided with radial support in the process of being pressed by the ring pressing, so that the O-shaped ring is prevented from running out from below the ring pressing, the success rate of O-shaped ring assembly and the mounting quality of the O-shaped ring are improved, and the sealing effect of the lens is ensured.

Description

Technical Field

[0001] This invention relates to the field of lens assembly technology, specifically to a lens retainer tightening fixture and its usage method for preventing O-rings from slipping out. Background Technology

[0002] O-rings are circular rubber seals with a simple structure, good sealing performance, and easy installation. They are commonly used in static or dynamic sealing applications and can effectively prevent liquid or gas leakage. They are widely used in machinery, automotive, and aerospace industries.

[0003] During the assembly of optical lenses, O-rings are required at the lens end for sealing to protect the internal components. The O-rings are tightened and fixed by a pressure ring that mates with the lens threads. Patent application CN210155380U discloses an optical lens pressure ring fastening device. By connecting the aforementioned fixture connector to the mounting base, a torque rotation fixture can be connected to the fixture connector, which controls the rotational torque of the optical lens pressure ring fastening device. Although the above device can control the rotational torque, in actual use, since the pressure ring is only tightened by contacting the lower end of the pressure ring fastening rod, the pressure applied by the pressure ring to the O-ring is uneven during the rotation of the pressure ring due to the screw thread. This causes the O-ring to deform and shift, destroying its original regular shape and making it easy for it to slip out of its mounting position. Ultimately, this leads to seal failure or the need for reassembly, seriously affecting the sealing performance and quality of the lens. Summary of the Invention

[0004] Technical objective: To address the shortcomings of existing lens O-ring assembly fixtures, this invention discloses a lens retainer tightening fixture and its usage method to prevent O-rings from slipping out.

[0005] Technical solution: To achieve the above technical objectives, the present invention adopts the following technical solution:

[0006] A lens retainer tightening fixture for preventing O-ring slippage includes a tightening sleeve for providing rotational torque by engaging with the end face of the retainer, and an O-ring guide post disposed within the tightening sleeve for limiting the position of the O-ring inside the lens. The lower end of the O-ring guide post is located on the inner circumference of the O-ring, providing radial support to the O-ring. The shape of the lower end face of the O-ring guide post matches the shape of the lens end face where the O-ring is located. The upper end face of the O-ring guide post is provided with an elastic clamping mechanism for providing pressure to the O-ring guide post when the retainer is tightened by the tightening sleeve.

[0007] Preferably, the O-ring guide post of the present invention is concentrically arranged inside the tightening sleeve, the upper part of the O-ring guide post is clearance-fitted with the tightening sleeve, and the elastic pressing mechanism is arranged between the upper end face of the O-ring guide post and the inner wall of the tightening sleeve. The axial movement of the tightening sleeve during the tightening process provides gradually increasing pressure to the O-ring guide post.

[0008] Preferably, the elastic clamping mechanism of the present invention includes an elastic element having the ability to extend and retract along the axial direction of the tightening sleeve. One end of the elastic element abuts against the upper end face of the O-ring guide post, and the other end abuts against the inner wall of the tightening sleeve. Before the tightening sleeve is tightened, the elastic element is in a natural state or a pre-compressed state.

[0009] Preferably, the upper end of the O-ring guide post of the present invention is coaxially connected to a positioning screw post for guiding and positioning the extension and retraction of the elastic element. The elastic element is sleeved on the outer periphery of the positioning screw post. The lower end of the positioning screw post is threadedly engaged with the O-ring guide post. The upper part of the positioning screw post passes through the tightening sleeve. The tightening sleeve is slidably engaged with the positioning screw post. A limiting mechanism for axially limiting the tightening sleeve is provided at the upper end of the positioning screw post.

[0010] Preferably, the limiting mechanism of the present invention includes a fixing pad with a diameter greater than that of the O-ring guide post and a fixing screw that passes through the fixing pad and is threaded into the positioning screw post, thereby pressing the fixing pad against the end of the positioning screw post by the fixing screw.

[0011] Preferably, the lower end face of the tightening sleeve of the present invention is provided with a positioning protrusion that cooperates with the pressure ring. The positioning protrusion is symmetrically arranged about the center of the tightening sleeve, and a groove that cooperates with the positioning protrusion is provided on the pressure ring.

[0012] This invention discloses a method for using a lens retainer tightening fixture based on the aforementioned anti-O-ring slippage method. The O-ring and spacer are placed sequentially into the lens according to their installation positions. After the tightening fixture is assembled, the retainer is inserted from the end of the O-ring guide post and engages with the positioning protrusion at the end of the tightening housing to transmit torque. The tightening fixture is then inserted from the end of the lens, with the end of the O-ring guide post abutting against the lens end face where the O-ring is located. The O-ring is positioned on the side wall of the O-ring guide post. The tightening housing is rotated to screw the retainer into the lens until it abuts against the spacer, thus pressing and fixing the spacer and O-ring inside the lens. The tightening fixture is then removed from the lens.

[0013] Preferably, the process of screwing the tightening sleeve into the lens housing of the present invention includes: applying axial pressure to the tightening sleeve, the tightening sleeve and the end of the pressure ring contacting the threaded area of ​​the lens, rotating the tightening sleeve, the pressure ring being screwed in along the threaded area of ​​the lens, the tightening sleeve moving axially along the positioning screw post as the pressure ring is screwed in, the elastic element being compressed downward by the tightening sleeve at its upper end during the movement of the tightening sleeve, and the lower end abutting against the upper end face of the O-ring guide post, providing downward pressure to the O-ring guide post and maintaining the stability of the O-ring guide post in the lens; after the pressure ring moves to the spacer position, the pressure ring continues to rotate downward to press the spacer and O-ring together. During the pressing process, the O-ring guide post provides radial support to the pressure ring, keeping the pressure ring aligned with the axial direction of the O-ring guide post, providing uniform pressure to the O-ring, and restricting the radial movement of the O-ring through the O-ring guide post, so that the O-ring is pressed under the pressure ring.

[0014] Preferably, when disassembling the tightening fixture, the tightening sleeve is loosened, and the elastic force of the elastic element causes the tightening sleeve to move upward, and the lower end of the tightening sleeve separates from the pressure ring until the tightening sleeve moves to the position of the fixing pad and is blocked by the fixing pad; then the entire tightening fixture is removed from the lens.

[0015] Beneficial effects: The lens retainer tightening fixture and its usage method for preventing O-ring slippage disclosed in this invention have the following beneficial effects:

[0016] 1. The O-ring tightening fixture of the present invention is equipped with an O-ring guide post, which can provide radial support to the O-ring during the pressing process of the O-ring, thereby preventing the O-ring from running out from under the O-ring, improving the success rate of O-ring assembly and the installation quality of the O-ring, and ensuring the sealing effect of the lens.

[0017] 2. The lower end of the O-ring guide post of the present invention matches the shape of the lens, and can provide stable support through the lens to keep the O-ring guide post in a stable position within the lens. With the help of the elastic clamping mechanism, the radial limiting effect of the O-ring guide post on the O-ring can be guaranteed.

[0018] 3. In this invention, the O-ring guide post and the tightening sleeve are concentrically arranged. When the pressure ring is tightened by the tightening sleeve, the pressure ring moves along the O-ring guide post. The O-ring guide post plays a limiting role for the pressure ring, which can prevent the pressure ring from deviating and make the clamping force applied by the pressure ring to the O-ring more uniform during the tightening process.

[0019] 4. The elastic element of the present invention abuts against the upper end face of the O-ring guide post and the inner wall of the tightening sleeve. During the tightening process of the pressure ring, the movement of the tightening sleeve drives the elastic element to compress and provide pressure. There is no need to set up a separate drive structure. The axial movement of the tightening sleeve during the tightening process of the pressure ring is directly used to achieve the desired effect. This simplifies the structure of the tooling, facilitates assembly, and reduces the difficulty of tooling operation. At the same time, the presence of the elastic element can also provide a buffer for the movement of the tightening sleeve, ensuring a smoother tightening process of the pressure ring.

[0020] 5. In this invention, a positioning screw post is provided above the O-ring guide post. The positioning screw post is coaxially arranged with the O-ring guide post. The positioning screw post guides and positions the extension and contraction of the elastic element, ensuring that the pressure of the elastic element is consistent with the axial direction of the O-ring guide post and is evenly transmitted to the O-ring guide post, thus ensuring the stability of the O-ring guide post position. At the same time, the positioning screw post can ensure the concentricity of the tightening sleeve and the O-ring guide post assembly, thereby improving the limiting effect on the O-ring.

[0021] 6. The present invention provides a limiting mechanism at the end of the positioning screw post, which blocks the tightening sleeve by fixing the fixing pad, restricting the tightening sleeve from moving upward, thus preventing the tightening sleeve from detaching from the tooling, thereby facilitating the overall placement and removal of the tooling.

[0022] 7. The tightening sleeve and the pressure ring of the present invention are connected by positioning protrusions and grooves, which facilitates the transmission of torque and avoids slippage, thus preventing the pressure ring assembly process from being affected. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0024] Figure 1 This is an exploded view of the clamping ring tightening fixture of the present invention;

[0025] Figure 2 This is a diagram showing the tightening state of the pressure ring tightening fixture of the present invention in conjunction with the lens;

[0026] Figure 3 This is a cross-sectional view of the tightening sleeve structure of the present invention;

[0027] Among them, 1-pressure ring, 2-tightening sleeve, 3-O-ring, 4-O-ring guide post, 5-elastic element, 6-positioning screw post, 7-fixing washer, 8-fixing screw, 9-positioning protrusion, 10-spacer. Detailed Implementation

[0028] Reference will now be made in detail to embodiments of the present disclosure, one or more of which are set forth herein. Each embodiment and example is provided by way of explanation of the apparatus, composition, and materials of the present disclosure, and not by way of limitation. Rather, the following description provides convenient illustrations for implementing exemplary embodiments of the present disclosure. Indeed, it will be apparent to those skilled in the art that various modifications and variations can be made to the teachings of the present disclosure without departing from the scope or spirit of the present disclosure.

[0029] like Figures 1-3 As shown, this invention discloses a lens retainer tightening fixture to prevent O-rings from slipping out. It includes a tightening housing 2 that engages with the end face of the retainer 1 to provide rotational torque, and an O-ring guide post 4 disposed within the tightening housing 2 to limit the position of the O-ring 3 within the lens. The lower end of the O-ring guide post 4 is located on the inner circumference of the O-ring 3, providing radial support to the O-ring 3. The shape of the lower end face of the O-ring guide post 4 matches the shape of the lens end face where the O-ring is located. The upper end face of the O-ring guide post 4 is provided with an elastic clamping mechanism to provide pressure to the O-ring guide post 4 when the retainer is tightened via the tightening housing.

[0030] During the tightening process of the pressure ring, the O-ring guide post 4 of the present invention maintains a stable relative position with the lens through the pressure provided by the elastic clamping mechanism, thereby ensuring the limiting effect on the O-ring 3 and keeping the O-ring 3 always below the pressure ring 1, so that the pressure ring 1 can apply pressure for tightening. At the same time, in the conventional lens sealing assembly structure, a spacer 10 is provided between the pressure ring 1 and the O-ring. The spacer 10 bears the deformation caused by the pressure of the pressure ring 1 and is evenly pressed on the surface of the O-ring, thereby ensuring the sealing effect of the O-ring on the lens.

[0031] To facilitate the operation of tightening fixtures, such as Figure 2 As shown, the O-ring guide post 4 of the present invention is concentrically arranged inside the tightening sleeve 2. The upper part of the O-ring guide post 4 is clearance-fitted with the tightening sleeve 2. The elastic pressing mechanism is arranged between the upper end face of the O-ring guide post 4 and the inner wall of the tightening sleeve 2. The axial movement of the tightening sleeve 2 during the tightening process provides the O-ring guide post 4 with gradually increasing pressure. The elastic pressing mechanism includes an elastic element 5 with the ability to extend and retract along the axial direction of the tightening sleeve 2, preferably a spring. One end of the elastic element 5 abuts against the upper end face of the O-ring guide post 4, and the other end abuts against the inner wall of the tightening sleeve 2. Those skilled in the art can adjust the relative dimensions of the elastic element 5 and the positioning screw post 6 so that the elastic element 5 is in a natural state or a pre-compressed state before the tightening sleeve 2 is tightened.

[0032] When tightening the pressure ring, it is only necessary to control the movement of the tightening sleeve 2 to tighten the pressure ring 1. During this process, the tightening sleeve 2 applies pressure to the elastic element 5, pressing the O-ring guide post 4 onto the lens. There is no need to apply power to the elastic clamping mechanism separately, which reduces the difficulty of tooling operation. The tightening operation can be performed by a single person, or the tightening sleeve 2 can be connected to the drive end of the robot arm, and the rotation and axial movement of the tightening sleeve 2 can be directly achieved by the robot arm. Whether it is rotation drive or axial movement, it is a conventional multi-degree-of-freedom movement method, which can be directly implemented using mature drive equipment in the existing technology. For example, the tightening sleeve 2 can be rotated by a motor, and the axial movement drive of the motor and the tightening sleeve 2 as a whole can be achieved by using a cylinder drive or electric cylinder, thereby achieving the purpose of tightening and installing the pressure ring using the tightening sleeve.

[0033] like Figure 1 and Figure 2 As shown, the upper end of the O-ring guide post 4 of the present invention is coaxially connected to a positioning screw post 6 for guiding and positioning the extension and retraction of the elastic element 5. The elastic element 5 is sleeved on the outer periphery of the positioning screw post 6. The lower end of the positioning screw post 6 is threadedly engaged with the O-ring guide post 4. The upper part of the positioning screw post 6 passes through the tightening sleeve 2. The tightening sleeve 2 is slidably engaged with the positioning screw post 6. A limiting mechanism for axially limiting the tightening sleeve 2 is provided at the upper end of the positioning screw post 6. By guiding and limiting the elastic element 5 through the positioning screw post 6, the direction of the elastic force can always be along the axial direction of the O-ring guide post 4, and the pressure application position is at the center of the O-ring guide post, so as to maintain uniform force at all contact points between the O-ring guide post and the lens. At the same time, the lower end of the positioning screw post 6 is threadedly connected to the O-ring guide post 4, and the upper end passes through the tightening sleeve 2. Concentric assembly between the tightening sleeve 2 and the O-ring guide post 4 can be achieved through the positioning screw post 6, thereby facilitating the assembly of the tooling.

[0034] The limiting mechanism of the present invention includes a fixing pad 7 with a diameter larger than that of the O-ring guide post 4 and a fixing screw 8 threaded onto the fixing pad 7 and engaged with the positioning screw post 6. The fixing pad 7 is pressed against the end of the positioning screw post 6 by the fixing screw 8. Below the fixing pad 7, the tightening sleeve 2 can move up and down within the compression stroke range of the elastic element 5. The reaction force generated when the elastic element 5 is compressed can buffer the movement of the tightening sleeve 2, thereby maintaining the smooth movement of the tightening sleeve 2 during the tightening of the pressure ring. After the pressure ring 1 is tightened and installed in place, the elastic force of the elastic element 5 causes the tightening sleeve 2 to automatically reset, thereby disengaging from the pressure ring 1.

[0035] To facilitate torque transmission, the lower end face of the tightening sleeve 2 of the present invention is provided with a positioning protrusion 9 that cooperates with the pressure ring 1. The positioning protrusion 9 is symmetrically arranged about the center of the tightening sleeve 2, and a groove is provided on the pressure ring 1 to cooperate with the positioning protrusion 9. In addition, the pressure ring 1 can be driven to rotate by friction by changing the roughness of the contact surface between the tightening sleeve 2 and the pressure ring 1. This method is suitable for occasions where the torque requirement is not high and can ensure the integrity of the pressure ring.

[0036] This invention also discloses a method for using the lens retainer tightening fixture based on the above-mentioned anti-O-ring slippage method. The O-ring and spacer are placed into the lens in sequence according to their installation positions. After the tightening fixture is assembled, the retainer is inserted from the end of the O-ring guide post and engages with the positioning protrusion at the end of the tightening sleeve to transmit torque. The entire tightening fixture is inserted from the end of the lens, with the end of the O-ring guide post abutting against the position of the O-ring inside the lens. The O-ring is located on the side wall of the O-ring guide post. The tightening sleeve is rotated to screw the retainer into the lens housing, and axial pressure is applied to the tightening sleeve. The tightening sleeve and the retainer at the end contact the threaded area of ​​the lens housing.

[0037] Rotate the tightening sleeve, and the retaining ring will screw into the threaded area of ​​the lens housing. As the retaining ring screws in, the tightening sleeve moves axially along the positioning screw post. During this movement, the upper end of the elastic element is compressed downward by the tightening sleeve, while the lower end abuts against the upper end face of the O-ring guide post, providing downward pressure to the O-ring guide post and maintaining its stable position within the lens. After the retaining ring moves to the spacer position, continue rotating the retaining ring downward to press the spacer and O-ring together. During this pressing process, the O-ring guide post provides radial pressure to the retaining ring. The support ensures that the pressure ring is aligned axially with the O-ring guide post, providing uniform pressure to the O-ring. The guide post also restricts the radial movement of the O-ring, pressing it firmly beneath the pressure ring. This secures the spacer and O-ring within the lens, allowing the tightening fixture to be removed from the lens. During fixture removal, loosen the tightening sleeve; the elastic element's force causes the sleeve to move upwards, disengaging the lower end of the sleeve from the pressure ring until it reaches the fixing pad and is blocked. Then, remove the entire tightening fixture from the lens.

[0038] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A lens gasket tightening tool for preventing O-ring runout, characterized by, The application relates to a lens ring tightening device, which comprises a tightening sleeve (2) for providing rotating torque by matching with the end face of a compression ring (1), and an O-ring guide column (4) arranged in the tightening sleeve (2) for limiting an O-ring (3) in the lens, the lower end of the O-ring guide column (4) is located at the inner periphery of the O-ring (3) to provide radial support for the O-ring (3), the lower end face of the O-ring guide column (4) is matched with the shape of the end face of the lens at the position of the O-ring, and the upper end face of the O-ring guide column (4) is provided with an elastic compression mechanism for providing pressure for the O-ring guide column (4) when the compression ring is tightened through the tightening sleeve. The O-ring guide column (4) is concentrically arranged in the tightening sleeve (2), the upper part of the O-ring guide column (4) is gap matched with the tightening sleeve (2), the elastic compression mechanism is arranged between the upper end face of the O-ring guide column (4) and the inner wall of the tightening sleeve (2), and the O-ring guide column (4) is provided with gradually increasing pressure through the axial movement of the tightening sleeve (2) during the compression ring tightening process. The lower end face of the tightening sleeve (2) is provided with a positioning protrusion (9) matched with the compression ring (1), the positioning protrusion (9) is symmetrically arranged about the center of the tightening sleeve (2), and a groove matched with the positioning protrusion (9) is arranged on the compression ring (1). A spacer ring is arranged between the compression ring and the O-ring, the spacer ring bears the deformation of the compression ring caused by the pressure and uniformly presses the O-ring surface. The O-ring and the spacer ring are sequentially placed into the lens according to the installation position, the compression ring is placed into the end part of the O-ring guide column and matched with the positioning protrusion at the end part of the tightening sleeve to perform torque transmission. The tightening sleeve is rotated, the compression ring is rotated into the threaded area of the lens shell, after the compression ring moves to the position of the spacer ring, the compression ring is continuously rotated to move downwards, the spacer ring and the O-ring are compressed, during the compression process, the O-ring guide column provides radial support for the compression ring, the compression ring is kept consistent with the axial direction of the O-ring guide column, the O-ring is provided with uniform pressure, the radial movement of the O-ring is limited through the O-ring guide column, the O-ring is compressed under the compression ring, and the spacer ring and the O-ring are compressed and fixed in the lens.

2. The lens ring tightening tool according to claim 1, wherein The elastic compression mechanism comprises an elastic element (5) capable of stretching and contracting along the axial direction of the tightening sleeve (2), one end of the elastic element (5) is abutted against the upper end face of the O-ring guide column (4), the other end is abutted against the inner wall of the tightening sleeve (2), and the elastic element (5) is in a natural state or a pre-compressed state before the tightening sleeve (2) is used for compression ring tightening.

3. The lens retaining ring tightening tool of claim 2, wherein The upper end of the O-ring guide column (4) is coaxially connected with a positioning screw column (6) for guiding and positioning the stretching and contraction of the elastic element (5), the elastic element (5) is sleeved on the outer periphery of the positioning screw column (6), the lower end of the positioning screw column (6) is threadedly matched with the O-ring guide column (4), the upper part of the positioning screw column (6) is arranged on the tightening sleeve (2), the tightening sleeve (2) is slidingly matched with the positioning screw column (6), and a limiting mechanism for limiting the axial direction of the tightening sleeve (2) is arranged on the upper end of the positioning screw column (6).

4. The lens retaining ring tightening tool of claim 3, wherein The limiting mechanism comprises a fixed pad (7) with a diameter larger than that of the O-ring guide column (4) and a fixed screw (8) threaded on the fixed pad (7) and matched with the positioning screw column (6), and the fixed pad (7) is pressed against the end of the positioning screw column (6) by the fixed screw (8).

5. The use of the lens cap screwing tool for preventing O-ring run-out according to any one of claims 1-4, characterized in that, The O-ring and the spacer are placed into the lens in sequence according to the installation positions, the compression ring is placed into the end of the O-ring guide column and matched with the positioning protrusion at the end of the tightening sleeve to transmit the torque, the tightening tool is installed into the lens, the end of the O-ring guide column abuts against the end face of the lens at the position of the O-ring, the O-ring is located at the side wall of the O-ring guide column, the compression ring is rotated into the lens by the tightening sleeve until the compression ring abuts against the spacer, the spacer and the O-ring are tightly fixed in the lens, and the tightening tool is taken out of the lens.

6. The method of claim 5, wherein the method further comprises: The process of rotating the compression ring into the lens housing by the tightening sleeve comprises the following steps: an axial pressure is applied to the tightening sleeve, the tightening sleeve and the compression ring at the end thereof are in contact with the threaded area of the lens, the tightening sleeve is rotated, the compression ring is rotated into the threaded area of the lens, the tightening sleeve moves along the axial direction of the positioning screw column with the rotation of the compression ring, the upper end of the elastic element is compressed downward by the tightening sleeve during the movement of the tightening sleeve, the lower end is in abutment against the upper end face of the O-ring guide column to provide a downward pressure to the O-ring guide column and keep the position of the O-ring guide column stable in the lens; after the compression ring moves to the position of the spacer, the compression ring is further rotated and moved downward to tightly compress the spacer and the O-ring, during the compression, the O-ring guide column provides radial support to the compression ring to keep the axial direction of the compression ring consistent with that of the O-ring guide column, provide uniform pressure to the O-ring, and limit the radial movement of the O-ring to tightly compress the O-ring below the compression ring.

7. The method of claim 5, wherein the method further comprises: When the tightening tool is disassembled, the tightening sleeve is loosened, the elastic force of the elastic element drives the tightening sleeve to move upward, the lower end of the tightening sleeve is separated from the compression ring, and the tightening sleeve is moved to the position of the fixed pad and is blocked by the fixed pad until the tightening tool is taken out of the lens.

Images