An ultra-close-pitch vacuum connection structure

Abstract

This utility model relates to the field of vacuum sealing technology, and in particular discloses an ultra-close-pitch vacuum connection structure, including a first carrier and a second carrier, with a through-type sealing tube between the two carriers. A tapered sealing ring capable of axial movement is fitted at both ends of the sealing tube, and an adjustment assembly is provided between the tapered sealing rings at both ends of the sealing tube. The tapered sealing ring is used to seal the gap between the sealing tube and the carrier. The adjustment assembly includes a first adjustment component and a second adjustment component coaxially fitted on the sealing tube. The opposing end faces of the two adjustment components are respectively provided with two meshing inclined gear sets. When the two adjustment components rotate relative to each other, they generate axial displacement through the meshing of the teeth of the two inclined gear sets, thereby driving the tapered sealing ring to move along the sealing tube. By driving the tapered sealing ring to move synchronously through the inclined gear sets, the sealing force can be precisely controlled, improving the stability of the vacuum seal. The structure is compact, suitable for ultra-close-pitch installation scenarios, and reduces space occupation.

Description

Technical Field

[0001] This utility model relates to the field of vacuum sealing technology, and in particular discloses an ultra-close-pitch vacuum connection structure. Background Technology

[0002] In scenarios involving ultra-close-range material transport or signal transmission, traditional sealing structures often exhibit significant drawbacks: The components used to establish the transmission channel lack stability, easily leading to transmission obstruction at extremely close distances and impacting overall efficiency; the seals are mostly fixed structures, unable to precisely adapt to the gap between the sealing tube and the carrier, resulting in prominent gas leakage issues and poor sealing reliability in vacuum environments. Adjustment mechanisms often require complex structures to move the seals, making operation cumbersome and resulting in low adjustment precision, failing to meet precise sealing requirements. Furthermore, existing structures often exhibit coaxiality deviations between the sealing ring and the adjustment assembly, leading to uneven force distribution, localized wear, seal failure, and shortened component lifespan; poorly designed sealing rings result in poor initial sealing performance and uneven force transmission, further reducing sealing stability. The gear sets of the adjustment assembly are mostly single-planar structures, enabling only limited adjustment levels, and prone to jamming during transitions. Uneven arrangement of multiple gear sets can also lead to unstable force transmission, affecting the lifespan of the adjustment assembly. Furthermore, the lack of clear installation benchmarks, intermediate adjustments, and extreme sealing positions makes it difficult to flexibly adapt to different working conditions. The adjustment components also lack a convenient locking structure, making them prone to loosening and inconvenient to maintain. Overall, it is difficult to guarantee the need for efficient and reliable use. Utility Model Content

[0003] In order to overcome the shortcomings and deficiencies of the existing technology, the purpose of this utility model is to provide an ultra-close-pitch vacuum connection structure.

[0004] To achieve the above objectives, this utility model provides an ultra-close-pitch vacuum connection structure, comprising a first carrier and a second carrier, with a through-type sealing tube between the two carriers. A tapered sealing ring capable of axial movement is fitted at both ends of the sealing tube, and an adjustment assembly is provided between the tapered sealing rings at both ends of the sealing tube. The tapered sealing ring is used to seal the gap between the sealing tube and the carrier. The adjustment assembly includes a first adjustment member and a second adjustment member coaxially fitted on the sealing tube. The opposing end faces of the two adjustment members are respectively provided with two meshing inclined gear sets. When the two adjustment members rotate relative to each other, the two adjustment members generate axial displacement through the meshing of the teeth of the two inclined gear sets, thereby driving the tapered sealing ring to move along the sealing tube.

[0005] This structure, through a through-type sealing tube, establishes a stable connection channel for the two carriers, ensuring smooth material transmission or signal conduction at extremely close distances. The axially movable conical sealing ring precisely adapts to the gap between the sealing tube and the carrier, effectively preventing gas leakage in a vacuum environment and improving sealing reliability. The adjustment assembly employs a dual-adjustment design with interlocking inclined gears. During relative rotation, the axial displacement generated by the meshing of the gears drives the conical sealing ring to move. This eliminates the need for complex external force application, making operation simple and providing high adjustment precision. The sealing ring position can be flexibly adjusted according to actual sealing requirements, ensuring efficient sealing under various working conditions and significantly enhancing the structure's applicability and practicality.

[0006] Furthermore, both the conical sealing ring and the adjusting component are ring-shaped structures, and their central axes are aligned with the central axis of the sealing tube. The thin end of the conical sealing ring is held between the sealing tube and the carrier, and the adjusting component is used to abut against the thick end of the conical sealing ring.

[0007] The conical sealing ring and adjusting assembly adopt a ring structure with their central axis aligned with the sealing tube, ensuring uniform stress distribution throughout the structure. This prevents localized wear or sealing failure due to eccentricity, extending the service life of each component. The narrow end of the conical sealing ring is clamped between the sealing tube and the carrier. The structural characteristics of the narrow end allow for a tighter fit into the gap, resulting in a superior initial seal. The adjusting assembly abuts against the wider end, which has a larger force-bearing area. This allows the force applied by the adjusting assembly to be transmitted more evenly to the sealing ring, ensuring that the sealing ring maintains a stable posture during axial movement, preventing tilting or displacement. This further enhances the stability of the seal adjustment and the consistency of the sealing effect, guaranteeing the long-term reliability of the vacuum connection.

[0008] Furthermore, the inclined gear assembly includes a first planar portion, a second planar portion, a third planar portion, and two transition inclined portions disposed between the three planar portions. The three planar portions form an axial stepped structure along the central axis of the adjustment assembly, and the first planar portion is the opposite end face of the two adjustment members.

[0009] The inclined gear assembly, with its three flat sections and two transition inclined sections forming an axial stepped structure, provides multi-level adjustment space for the adjustment component. The different flat sections allow the adjusting parts to stop at different contact positions during relative rotation, achieving varying degrees of axial displacement adjustment to meet diverse sealing requirements. The transition inclined sections provide a smooth transition, preventing jamming during rotation and ensuring smooth adjustment. Simultaneously, the first flat section, as the opposing end face of the two adjusting parts, achieves good initial contact, laying a stable foundation for subsequent adjustments. This structural design enhances both the flexibility and stability and controllability of the adjustment process.

[0010] Furthermore, the two adjusting members are rotated relative to each other until the first plane portion of one adjusting member abuts against the third plane portion of the other adjusting member, and the adjusting assembly is in its original adjusting position.

[0011] Clearly defining the initial adjustment position—that is, the first plane of one adjustment component abutting against the third plane of another—provides a clear benchmark for the initial installation and commissioning of the structure. During initial installation, operators can quickly adjust the adjustment components to their original positions based on this benchmark, eliminating the need for repeated calibration and significantly improving installation efficiency. The initial adjustment position also provides a reference starting point for subsequent adjustment operations, allowing operators to accurately judge the adjustment range and avoid over- or under-adjustment due to unclear initial positions, ensuring the sealing effect meets expectations. Furthermore, the existence of the initial adjustment position allows the structure to be easily restored to its initial state after maintenance or repair, reducing maintenance difficulty and ensuring long-term stable operation of the structure.

[0012] Furthermore, the two adjusting members are rotated relative to each other until the first flat portion of one adjusting member abuts against the second flat portion of the other adjusting member, and the adjusting assembly is in the first adjusting position.

[0013] The first adjustment position provides an intermediate adjustment option for the structure. When the gap between the sealing tube and the carrier changes, or when the initial sealing effect is not optimal, the adjustment component can be adjusted to the first adjustment position. At this time, the first flat part of one adjustment component abuts against the second flat part of another adjustment component, and the engagement of the inclined gear set generates a corresponding axial displacement, driving the conical sealing ring to move to a more suitable position, further optimizing the sealing effect. The existence of this adjustment position makes the sealing adjustment of the structure more layered, and can accurately respond to moderate changes in sealing requirements. It avoids the problem of insufficient adjustment accuracy that may occur when relying solely on the original adjustment position and the extreme adjustment position, and improves the adaptability of the structure to different sealing conditions.

[0014] Furthermore, the two adjusting members are rotated until the first flat portion of one adjusting member abuts against the first flat portion of the other adjusting member, and the adjusting assembly is in the second adjusting position.

[0015] The second adjustment position serves as the ultimate adjustment point for the adjustment assembly. When the gap between the sealing tube and the carrier is large, or when a stronger sealing force is required, adjusting the adjustment assembly to this position allows for maximum axial displacement. At this point, the first flat surfaces of the two adjustment components abut against each other, and the inclined gear set is fully engaged, driving the conical sealing ring to move to its maximum stroke. This effectively fills the larger gap, ensuring a tight seal. This adjustment position enables the structure to handle extreme sealing conditions, expanding its application range. Furthermore, the clearly defined second adjustment position provides operators with a clear reference for the adjustment endpoint, preventing damage to components due to excessive rotation of the adjustment components. This ensures the safety and reliability of the adjustment operation and further improves the structure's adjustment function system.

[0016] Furthermore, the number of the inclined gear groups is set to be multiple, and the multiple inclined gear groups are arranged around the central axis of the adjusting component.

[0017] Multiple beveled tooth assemblies are arranged around the central axis of the adjusting component, ensuring a more even distribution of force points during relative rotation. This prevents excessive wear of the tooth surfaces caused by excessive force on a single or small number of tooth assemblies, extending the service life of the adjusting assembly. The evenly distributed tooth assemblies transmit axial displacement more smoothly to the conical sealing ring, ensuring that the sealing ring remains coaxial during movement and does not skew due to uneven force, thus guaranteeing the stability of the sealing effect. Furthermore, the multiple tooth assemblies design also improves the load-bearing capacity of the adjusting assembly, enabling it to withstand greater axial forces. Even under high vacuum or harsh operating conditions, it can stably perform the adjusting function, enhancing the durability and reliability of the entire vacuum connection structure and meeting the requirements of long-term high-intensity use.

[0018] Furthermore, the outer circumferential surface of the adjusting component is provided with a plurality of fastening holes, which are used to insert fasteners to fix the adjusting component to the sealing tube, thereby locking the axial length of the adjusting component.

[0019] Multiple fastening holes circumferentially arranged on the outer periphery of the adjusting component provide a convenient and reliable way to fix the adjusting assembly and the sealing tube. After the seal adjustment is completed, fasteners inserted into the fastening holes can quickly fix the adjusting assembly and the sealing tube, effectively locking the axial length of the adjusting assembly and preventing loosening of the adjusting component due to external factors such as vibration and temperature changes. This ensures that the conical sealing ring always remains in the optimal sealing position, avoiding sealing failure. The multiple fastening holes arranged circumferentially distribute the fixing force evenly on the adjusting component, avoiding excessive local stress that could cause component deformation and ensuring the stability and reliability of the fixation. At the same time, this fixing method is simple to operate, facilitating subsequent disassembly and readjustment according to actual needs, balancing structural stability and maintenance convenience.

[0020] Furthermore, the conical sealing ring has a conical portion and an annular portion at both ends along the axial direction; the outer peripheral surface of the conical portion is a tapered surface that gradually tapers toward the carrier, and the end of the tapered surface abuts against the carrier to form a circumferential seal, and the end face of the annular portion abuts against the adjusting component.

[0021] The conical sealing ring features a conical section and an annular section at both ends of its axial direction, achieving a rational functional division. The tapered section's outer circumference tapers towards the support, allowing it to smoothly embed into the sealing gap upon contact with the support through the guiding effect of the conical surface. Furthermore, the contact area between the conical surface and the support increases with the embedding depth, gradually enhancing the sealing effect and forming a reliable circumferential seal that effectively prevents gas leakage. The annular section's end face abuts against the adjusting component. The flat end face of the annular section ensures good surface contact with the adjusting component, guaranteeing that the force applied by the adjusting component is evenly transmitted to the sealing ring, avoiding localized stress concentration that could damage the sealing ring. This structural design enables the conical sealing ring to achieve both high-efficiency sealing and stable resistance to the forces exerted by the adjusting component, improving the overall performance and service life of the sealing ring.

[0022] Furthermore, the slope of the transition slope is 15°-30°.

[0023] The slope of the transition section is set within the range of 15°-30°, after thorough consideration of mechanics and practicality. This slope range achieves an optimal balance between adjustment sensitivity and adjustment stability. Too small a slope results in insufficient axial displacement during relative rotation of the adjusting component, leading to low adjustment efficiency and difficulty in quickly achieving the desired sealing effect. Too large a slope causes excessively rapid changes in axial displacement, reducing adjustment accuracy and increasing the risk of sudden stress changes during rotation, thus increasing the risk of component damage. A slope of 15°-30° ensures smooth axial displacement during rotation, allowing operators to precisely control the adjustment range while balancing adjustment efficiency and structural stability. This makes the entire adjustment process more efficient and reliable, further optimizing the structural performance.

[0024] The beneficial effects of this utility model are:

[0025] In this structure, the through-type sealing tube provides a stable channel for the two carriers, ensuring smooth material transmission or signal conduction at extremely close distances and avoiding transmission obstruction. The axially movable conical sealing ring can precisely adapt to the gap between the sealing tube and the carrier, effectively preventing gas leakage and improving sealing reliability in a vacuum environment. The dual adjustment components generate axial displacement through intermeshing inclined gear sets, driving the sealing ring to move. This eliminates the need for complex structures, making operation simple and adjustment highly accurate.

[0026] Both the annular sealing ring and the adjusting assembly are coaxial with the sealing tube, ensuring uniform force distribution and preventing localized wear or seal failure due to eccentricity, thus extending component lifespan. The narrow end of the sealing ring, embedded in the gap, enhances the initial seal, while the wider end provides a larger force-bearing surface, resulting in more uniform force transmission and further improving sealing stability. The multi-plane portion of the beveled gear assembly enables multi-level adjustment, and the transition beveled portion prevents adjustment jamming. The multiple gears arranged in a circular pattern ensure smoother force transmission, extending the lifespan of the adjusting assembly.

[0027] The original, first, and second adjustment positions provide installation reference, intermediate adjustment, and ultimate sealing capabilities, respectively, flexibly adapting to different working conditions. The fastening holes on the adjustment components facilitate the insertion of fasteners to lock the axial length, preventing loosening and facilitating maintenance. The tapered portion of the sealing ring enhances the sealing effect, while the circular portion avoids stress concentration; the 15°-30° transition slope balances adjustment sensitivity and stability, ensuring overall high efficiency and reliability. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the overall structure of an ultra-close-pitch vacuum connection structure according to this utility model;

[0029] Figure 2 This is a partial structural schematic diagram of the present invention;

[0030] Figure 3 This is a partial exploded view of the present invention;

[0031] Figure 4 This is a schematic diagram of the structure of the adjusting component of this utility model.

[0032] The reference numerals in the accompanying drawings include: 1. First carrier; 2. Second carrier; 3. Sealing tube; 4. Conical sealing ring; 5. Adjustment assembly; 6. First adjusting member; 7. Second adjusting member; 8. Inclined tooth assembly; 9. First flat portion; 11. Second flat portion; 12. Third flat portion; 13. Transitional inclined portion; 14. Fastening hole; 15. Conical portion; 16. Circular portion; 17. Vertical portion. Detailed Implementation

[0033] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0034] Please see Figures 1 to 4 As shown, this utility model discloses an ultra-close-pitch vacuum connection structure, including a first carrier 1 and a second carrier 2, with a through-type sealing tube 3 between the two carriers. A tapered sealing ring 4, which can move axially, is fitted at both ends of the sealing tube 3. An adjustment component 5 is provided between the tapered sealing rings 4 at both ends of the sealing tube 3. The tapered sealing rings 4 are used to seal the gap between the sealing tube 3 and the carrier. The adjustment component 5 includes a first adjustment member 6 and a second adjustment member 7 coaxially fitted on the sealing tube 3. Two meshing inclined tooth sets 8 are provided on the opposite end faces of the two adjustment members. When the two adjustment members rotate relative to each other, they generate axial displacement through the meshing of the tooth surfaces of the two inclined tooth sets 8, thereby driving the tapered sealing ring 4 to move along the sealing tube 3.

[0035] During actual installation, firstly, the two ends of the through-type sealing tube 3 are passed through the pre-set mounting holes of the first carrier 1 and the second carrier 2, respectively, so that the two ends of the sealing tube 3 extend a certain length beyond the two carriers, ensuring that the two carriers are in a very close and relatively fixed state. Next, the two conical sealing rings 4 are respectively fitted onto the two ends of the sealing tube 3, initially maintaining a certain gap between the conical sealing rings 4 and the carriers to facilitate subsequent adjustments. Subsequently, the first adjusting member 6 and the second adjusting member 7 are coaxially fitted onto the sealing tube 3 and placed between the two conical sealing rings 4, ensuring that the opposite end faces of the two adjusting members are in contact with each other. At this time, the inclined tooth group 8 on the two adjusting members is initially engaged.

[0036] When a seal is required, the operator uses a wrench or other tools to clamp the first adjusting member 6 and the second adjusting member 7, causing them to rotate relative to each other. During rotation, the inclined tooth groups 8 on the end faces of the two adjusting members press and mesh with each other through the tooth surfaces. Since the tooth surfaces of the inclined tooth groups 8 have an inclination angle, the relative rotation is converted into displacement along the axial direction of the sealing tube 3. One adjusting member moves towards one end of the conical sealing ring 4, and the other adjusting member moves towards the other end of the conical sealing ring 4, thereby pushing the conical sealing rings 4 at both ends to move along the axial direction of the sealing tube 3 until the conical sealing rings 4 are in close contact with the carrier, filling the gap between the sealing tube 3 and the carrier, thus achieving a sealing effect.

[0037] Specifically, the conical sealing ring 4 and the adjusting component 5 are both ring-shaped structures, and their central axes are consistent with the central axis of the sealing tube 3; the thin end of the conical sealing ring 4 is clamped between the sealing tube 3 and the carrier, and the adjusting component 5 is used to abut against the thick end of the conical sealing ring 4.

[0038] During assembly, since both the conical sealing ring 4 and the adjusting component 5 are annular structures, their inner holes must be precisely aligned with the outer circle of the sealing tube 3 to ensure that their central axes are completely coincident and to avoid eccentricity. For the conical sealing ring 4, its thinner end diameter is smaller than its thicker end diameter. During assembly, the thinner end should face the carrier side, and the conical sealing ring 4 should be slowly pushed so that the thinner end gradually embeds into the gap between the sealing tube 3 and the carrier. At this time, the outer circumferential surface of the thinner end makes initial contact with the inner wall of the carrier, and the inner circumferential surface of the thinner end makes initial contact with the outer wall of the sealing tube 3, laying the foundation for subsequent sealing.

[0039] The adjusting component 5 is assembled between two conical sealing rings 4. Its annular inner hole fits snugly against the outer wall of the sealing tube 3, and its outer diameter is designed according to the installation space. When the adjusting component 5 undergoes axial displacement, its two end faces contact the coarse end faces of the two conical sealing rings 4. Due to the larger area of ​​the coarse end faces, the thrust applied by the adjusting component 5 can be evenly distributed on the coarse end faces, preventing deformation of the conical sealing rings 4 due to excessive local stress. As the adjusting component 5 continuously pushes the conical sealing rings 4, the fine end penetrates further into the gap under the thrust, making the contact with the sealing tube 3 and the carrier more compact. Simultaneously, because all three are coaxial, the conical sealing rings 4 will not tilt, ensuring that the fine end evenly fills the gap and achieves a stable seal. The adjusting component 5 can also move smoothly along the axial direction, avoiding adjustment obstruction or component wear due to eccentricity.

[0040] Specifically, the inclined tooth assembly 8 includes a first planar portion 9, a second planar portion 11, a third planar portion 12, and two transition inclined portions 13 disposed between the three planar portions. The three planar portions form an axial stepped structure along the central axis of the adjusting assembly 5. The first planar portion 9 is the end face of the two adjusting members facing each other.

[0041] When processing the adjusting parts, beveled tooth sets 8 need to be machined on the opposite end faces of the two adjusting parts. Each beveled tooth set 8 is machined according to the design dimensions to have a first flat part 9, a second flat part 11, a third flat part 12, and two transition beveled parts 13. The three flat parts are stepped along the central axis of the adjusting parts. The first flat part 9 is located at the position closest to the outer side of the end face of the adjusting part, serving as the initial contact surface for the two adjusting parts to fit together. The second flat part 11 is located inside the first flat part 9 and is recessed inward along the axial direction to a certain depth. The third flat part 12 is located inside the second flat part 11, and its recess depth is greater than that of the second flat part 11.

[0042] The two transition slope portions 13 are respectively connected to the first flat portion 9 and the second flat portion 11, and the second flat portion 11 and the third flat portion 12, and the transition slope portions 13 are at a certain angle to the axial direction. In the specific adjustment operation, the first flat portions 9 of the two adjusting members are in contact with each other in the initial state, and the slope tooth group 8 is in a state of incomplete engagement.

[0043] When adjustment is required, one of the adjusting components is rotated, causing the inclined tooth set 8 on its end face to slide relative to the inclined tooth set 8 on the end face of the other adjusting component. The tooth surface, starting from the first flat portion 9, gradually slides along the first transition inclined portion 13 towards the second flat portion 11. Due to the inclination of the transition inclined portion 13, the adjusting component will generate axial displacement during the sliding process, the amount of which is equal to the axial height difference between the first flat portion 9 and the second flat portion 11. If the adjusting component is rotated further, the tooth surface will slide along the second transition inclined portion 13 from the second flat portion 11 to the third flat portion 12. At this time, the adjusting component will generate a larger axial displacement, the amount of which is equal to the axial height difference between the second flat portion 11 and the third flat portion 12. Through this stepped design of the flat portion and the transition inclined portion 13, the axial displacement of the adjusting component is controlled in stages, meeting the adjustment requirements of different sealing gaps.

[0044] Specifically, the two adjusting members are rotated relative to each other until the first plane portion 9 of one adjusting member abuts against the third plane portion 12 of the other adjusting member, and the adjusting assembly 5 is in the original adjusting position.

[0045] When readjusting after initial assembly or maintenance of the structure, the adjusting component 5 needs to be set back to its original adjustment position. The specific operating steps are as follows: First, place the two adjusting components onto the sealing tube 3 respectively, bringing their opposing end faces close together. At this point, fix one adjusting component to prevent it from rotating. Then, use a tool to rotate the other adjusting component, causing the two adjusting components to rotate relative to each other. During the rotation, closely observe the fit between the end faces of the two adjusting components. Check by visual inspection or with the aid of tools such as a feeler gauge. When the first flat part 9 of one adjusting component is found to be in complete contact with the third flat part 12 of the other adjusting component, stop rotating.

[0046] At this point, due to the maximum axial height difference between the first planar portion 9 and the third planar portion 12, the axial distance between the two adjusting components is at its maximum, the overall length of the adjusting assembly 5 is at its longest, and the thrust on the conical sealing rings 4 at both ends is at its minimum. They are in a state where they are not fully embedded in the gap between the sealing tube 3 and the carrier, thus reserving the maximum adjustment space for subsequent adjustments based on actual sealing requirements. The initial adjustment position provides a clear starting point for subsequent adjustments. In practical applications, operators can record the relative positions of the adjusting components at the initial adjustment position using markings or other methods. This facilitates quickly finding the initial state during subsequent maintenance or readjustment, ensuring the accuracy and efficiency of the adjustment process and avoiding adjustment errors due to uncertain initial positions.

[0047] Specifically, the two adjusting members are rotated relative to each other until the first flat portion 9 of one adjusting member abuts against the second flat portion 11 of the other adjusting member, and the adjusting assembly 5 is in the first adjusting position.

[0048] When the gap between the sealing tube 3 and the carrier is of medium size and a medium degree of sealing force is required, the adjusting component 5 needs to be adjusted to the first adjusting position. The specific implementation method is as follows: Based on the original adjusting position, the operator continues to rotate the adjusting component, so that the two adjusting components keep rotating relative to each other. At this time, the third plane portion 12 of the fixed adjusting component end face separates from the first plane portion 9 of the rotating adjusting component end face, and the first plane portion 9 of the rotating adjusting component begins to slide along the transition slope portion 13 towards the second plane portion 11 of the fixed adjusting component.

[0049] During the sliding process, due to the guiding effect of the transition inclined surface 13, the rotating adjusting component gradually moves closer to the fixed adjusting component, and the axial distance between the two adjusting components gradually decreases, shortening the overall length of the adjusting assembly 5. The operator monitors the displacement of the adjusting component by observation or with the aid of measuring tools. When the first flat portion 9 of the rotating adjusting component fully abuts against the second flat portion 11 of the fixed adjusting component, rotation stops, and the adjusting assembly 5 is in the first adjusting position. In this position, the axial length of the adjusting assembly 5 is between the original adjusting position and the second adjusting position. The adjusting components at both ends apply a moderate thrust to the conical sealing rings 4 on both sides, pushing the conical sealing rings 4 to move axially along the sealing tube 3, causing the thinner end of the conical sealing ring 4 to embed into the gap between the sealing tube 3 and the carrier, filling part of the gap and forming a moderate sealing effect. In practical applications, if a slight leak is found after the initial sealing, the adjusting assembly 5 can be adjusted to the first adjusting position. By moderately increasing the thrust, the sealing force can be improved, resolving the slight leak problem. There is no need to directly adjust to the second adjusting position with the maximum thrust, avoiding over-adjustment that could lead to component wear.

[0050] Specifically, the two adjusting members are rotated until the first flat portion 9 of one adjusting member abuts against the first flat portion 9 of the other adjusting member, and the adjusting assembly 5 is in the second adjusting position.

[0051] When the gap between the sealing tube 3 and the carrier is large, or when the highest level of sealing force is required to meet the needs of a high vacuum environment, the adjusting component 5 needs to be adjusted to the second adjusting position. The specific implementation process is as follows: Based on the first adjusting position, the operator continues to apply rotational force to the adjusting component, causing the two adjusting components to rotate relative to each other continuously. At this time, the first flat part 9 of the rotating adjusting component separates from the second flat part 11 of the fixed adjusting component, and continues to slide along the second transition slope 13 towards the first flat part 9 of the fixed adjusting component. As the rotation continues, the axial distance between the two adjusting components further decreases, the overall length of the adjusting component 5 continuously shortens, and the thrust of the adjusting components at both ends on the conical sealing ring 4 continuously increases.

[0052] Operators observe the contact between the conical sealing ring 4 and the carrier, or monitor the sealing effect using vacuum testing equipment. When the first flat portion 9 of the rotating adjusting component completely overlaps and abuts with the first flat portion 9 of the fixed adjusting component, rotation stops, and the adjusting assembly 5 is in the second adjusting position. In this position, the axial length of the adjusting assembly 5 is at its shortest, and the thrust of the adjusting component on the conical sealing ring 4 reaches its maximum value. Under the maximum thrust, the conical sealing ring 4 moves axially along the sealing tube 3 to its limit position, its thin end completely embedding into the gap between the sealing tube 3 and the carrier, tightly fitting against the outer wall of the sealing tube 3 and the inner wall of the carrier, maximizing the filling of the gap and forming a high-strength, leak-free seal. In high-vacuum equipment, precision instruments, and other scenarios with extremely high sealing requirements, the second adjusting position ensures that the structure meets stringent sealing standards, guaranteeing the normal operation of the equipment.

[0053] Specifically, the number of inclined tooth groups 8 is set to multiple, and the multiple inclined tooth groups 8 are arranged around the central axis of the adjusting member.

[0054] When machining the end face of the adjusting component, the number of inclined gear sets 8 is designed to be multiple (usually 4-8) according to the diameter and load-bearing requirements of the adjusting component. CNC machining equipment is used to evenly arrange the multiple inclined gear sets 8 around the central axis of the adjusting component, ensuring that the included angle between adjacent inclined gear sets 8 is equal. During the actual adjustment process, when the two adjusting components rotate relative to each other, the multiple inclined gear sets 8 simultaneously mesh and slide. Each inclined gear set 8 undertakes a portion of the force transmission task, avoiding problems such as tooth surface wear and deformation caused by excessive force on a single inclined gear set 8.

[0055] Because multiple inclined tooth groups 8 are evenly distributed, the circumferential force on the adjusting component during rotation is evenly distributed across each tooth group. Uneven local force distribution prevents eccentric rotation or jamming of the adjusting component, ensuring smooth axial movement of the adjusting component along the sealing tube 3. Simultaneously, the synchronous meshing and sliding of multiple inclined tooth groups 8 makes the axial displacement of the adjusting component more stable and precise, preventing displacement fluctuations caused by unstable sliding of a single tooth group. This ensures that the conical sealing ring 4 moves uniformly along the sealing tube 3, evenly embedding into the gap, improving the stability and consistency of the seal. In long-term use, the design of multiple inclined tooth groups 8 also extends the service life of the adjusting component 5. Even if individual tooth groups experience slight wear, other tooth groups can still function normally, ensuring the continued reliability of the structure.

[0056] Specifically, the outer circumferential surface of the adjusting component is provided with a plurality of fastening holes 14, which are used to insert fasteners to fix the adjusting component 5 to the sealing tube 3, thereby locking the axial length of the adjusting component 5.

[0057] When machining the adjusting component, multiple fastening holes 14 (usually 3-6) are evenly drilled circumferentially on its outer surface. The diameter and depth of the fastening holes 14 are determined according to the specifications of the selected fasteners (such as hex socket head cap screws), and it is ensured that the fastening holes 14 penetrate the wall thickness of the adjusting component so that the fasteners can pass through the fastening holes 14 and contact the outer wall of the sealing tube 3. After the adjusting component 5 is adjusted to the required position (original adjusting position, first adjusting position, or second adjusting position), in order to prevent the adjusting component from rotating relative to the adjusting component due to factors such as vibration and temperature changes during equipment operation, thereby changing the axial length of the adjusting component 5 and affecting the sealing effect, it is necessary to fix the adjusting component 5.

[0058] In practice, the operator selects fasteners that match the fastening holes 14, inserts each fastener into one of the holes, and then tightens the fasteners with a tool until the ends of the fasteners press firmly against the outer wall of the sealing tube 3. Through the friction between the fasteners and the sealing tube 3, the adjusting component is fixed to the sealing tube 3, thus locking the axial length of the entire adjusting assembly 5 and preventing further changes. Because the multiple fastening holes 14 are evenly distributed circumferentially, the tightened fasteners can apply fixing force to the adjusting component from multiple directions, ensuring a more secure fixation between the adjusting component and the sealing tube 3, preventing loosening. When readjustment of the adjusting assembly 5 is required, simply loosen the fasteners to release the fixing between the adjusting component and the sealing tube 3, and then rotate for adjustment. After adjustment, tighten the fasteners again. The operation is simple and facilitates later maintenance and adjustment.

[0059] Specifically, the conical sealing ring 4 has a conical portion 15 and an annular portion 16 at both ends along the axial direction; the outer peripheral surface of the conical portion 15 is a conical surface that gradually tapers toward the carrier, and the end of the conical surface abuts against the carrier to form a circumferential seal, and the end face of the annular portion 16 abuts against the adjusting component 5.

[0060] The conical sealing ring 4 adopts a segmented structural design, with a conical portion 15 and a circular portion 16 at its two axial ends, which play different roles in actual assembly and use. During assembly, the conical portion 15 of the conical sealing ring 4 faces the support body, and the circular portion 16 faces the adjusting component 5. When the adjusting component 5 applies an axial thrust to the circular portion 16, since the end face of the circular portion 16 is flat, the thrust can be evenly transmitted to the entire conical sealing ring 4, avoiding tilting of the conical sealing ring 4 due to uneven force. Under the action of the thrust, the conical sealing ring 4 moves axially towards the support body along the sealing tube 3, and the outer peripheral surface of the conical portion 15 (the tapered surface that gradually narrows towards the support body) gradually contacts the inner wall of the support body.

[0061] As the thrust increases, the conical portion 15 continues to move, and the contact area between the conical surface and the inner wall of the carrier body continuously increases. Simultaneously, the inner circumferential surface of the conical portion 15 also fits tightly against the outer wall of the sealing tube 3. Due to the tapered structure of the conical surface, the conical portion 15 can gradually embed itself into the gap between the sealing tube 3 and the carrier body, forming a tight circumferential sealing surface, effectively preventing gas leakage from the gap. In addition to transmitting thrust, the annular portion 16 also provides support for the conical portion 15, preventing deformation or damage due to excessive force during embedding. In a high vacuum environment, this structural design ensures that the sealing surface remains tightly fitted at all times. Even with slight vibrations during equipment operation, the conical portion 15 can maintain a stable sealing state under the support and thrust of the annular portion 16, ensuring the durability of the sealing effect.

[0062] Specifically, the slope of the transition slope 13 is 15°-30°.

[0063] When designing the transition slope 13 of the inclined gear assembly 8, its slope (i.e., the angle between the transition slope 13 and the axis of the adjusting component) is set to 15°-30°. This angle range is the optimal range determined through extensive experiments and practical applications. During the adjustment process, when the two adjusting components rotate relative to each other, the transition slope 13, as a force transmission and guiding structure, directly affects the sensitivity and stability of the adjustment. If the slope is too small (less than 15°), the axial displacement generated when the adjusting component rotates a large angle is small, resulting in low adjustment efficiency. Operators need to rotate the adjusting component for a long time to achieve the required sealing effect, and over- or under-adjustment is prone to occur during the adjustment process.

[0064] If the inclination is too large (greater than 30°), a small rotation of the adjusting component will produce a large axial displacement. This excessively high adjustment sensitivity makes it difficult to precisely control the displacement, potentially causing the conical sealing ring 4 to quickly embed into the gap and violently collide with the support, resulting in component damage. Furthermore, excessively rapid displacement may lead to uneven sealing surface contact, affecting the sealing effect. An inclination of 15°-30° achieves the optimal balance between adjustment sensitivity and stability. When the operator rotates the adjusting component, they can obtain significant axial displacement through a moderate rotation angle, improving adjustment efficiency, while precisely controlling the displacement to ensure the conical sealing ring 4 smoothly embeds into the gap. This avoids component damage and uneven sealing, meeting adjustment requirements under different working conditions and ensuring the practicality and reliability of the structure.

[0065] The overall working principle of this utility model is as follows: First, the two ends of the through-type sealing tube 3 are passed through the preset mounting holes of the first and second carriers 2, so that the two carriers are kept at a very close distance and relatively fixed; then, the annular conical sealing ring 4 with a conical part 15 and a circular part 16 is sleeved from both ends of the sealing tube 3, so that its thin end (conical part 15) faces the carrier and its thick end (circular part 16) faces the middle area, leaving an adjustment gap in the initial state; then, the annular adjustment component 5 (including the first and second adjustment components 7) is coaxially sleeved on the sealing tube 3 and placed between the two conical sealing rings 4 to ensure that the multiple sets of inclined teeth 8 on the end face of the adjustment component are initially engaged, and the central axis of all components is consistent with the sealing tube 3 to avoid eccentricity.

[0066] When sealing is required, the operator uses a tool to clamp the two adjusting parts and rotate them relative to each other. The inclined tooth assembly 8 (including three stepped flat parts and transition inclined parts 13) converts the rotational motion into axial displacement along the sealing tube 3 through tooth surface meshing and sliding. The two adjusting parts apply a thrust to the annular part 16 of the conical sealing ring 4 on both sides, pushing the conical sealing ring 4 to move axially, so that the conical part 15 gradually shrinks and embeds into the gap between the sealing tube 3 and the carrier, gradually filling the gap to achieve sealing.

[0067] During the sealing adjustment process, multiple adjustment positions can be achieved by controlling the relative rotation amplitude of the two adjusting components: when the first plane portion 9 of one adjusting component abuts against the third plane portion 12 of the other adjusting component, the adjusting assembly 5 is in its original adjustment position, reserving the maximum adjustment space; continue rotating until the first plane portion 9 abuts against the second plane portion 11, entering the first adjustment position, applying a moderate thrust to form a moderate seal, which can solve minor leaks; then rotate until the first plane portions 9 of the two adjusting components are completely abutted, reaching the second adjustment position, generating the maximum thrust to make the conical portion 15 fully embedded in the gap, meeting the stringent sealing requirements of high vacuum. At the same time, multiple sets of circumferentially arranged inclined tooth groups 8 ensure uniform force and smooth displacement, avoiding component jamming or wear; after adjustment, fasteners are inserted through multiple fastening holes 14 on the outer periphery of the adjusting component to fix the adjusting assembly 5 and the sealing tube 3, locking the axial length to prevent loosening. In addition, the 13-degree slope balance adjustment sensitivity and stability of the 15°-30° transition slope section ensures that operators can accurately control the displacement, ultimately achieving a highly efficient, stable and flexibly adjustable vacuum sealing effect at ultra-close distances.

[0068] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. An ultra-close pitch vacuum connection structure comprising a first carrier body (1), a second carrier body (2), characterized in that: A through-type sealing tube (3) is provided between the two carriers. A conical sealing ring (4) that can move axially is sleeved at both ends of the sealing tube (3). An adjustment component (5) is provided between the conical sealing rings (4) at both ends of the sealing tube (3). The conical sealing ring (4) is used to seal the gap between the sealing tube (3) and the carrier. The adjustment component (5) includes a first adjustment member (6) and a second adjustment member (7) that are coaxially sleeved on the sealing tube (3). The opposite end faces of the two adjustment members are provided with two mutually meshing inclined tooth groups (8). When the two adjustment members rotate relative to each other, the two adjustment members generate axial displacement through the meshing of the tooth surfaces of the two inclined tooth groups (8), thereby driving the conical sealing ring (4) to move along the sealing tube (3).

2. The ultra-close pitch vacuum connection structure according to claim 1, characterized in that: The conical sealing ring (4) and the adjusting component (5) are both ring structures, and their central axes are consistent with the central axis of the sealing tube (3).

3. The ultra-close pitch vacuum connection structure according to claim 1, characterized in that: The inclined gear assembly (8) includes a first planar portion (9), a second planar portion (11), a third planar portion (12), and two transition inclined portions (13) disposed between the three planar portions. Each planar portion and each inclined portion together form an axial stepped structure. The first planar portion (9) is the end face of two adjusting members facing each other.

4. The ultra-close pitch vacuum connection structure according to claim 3, characterized in that: The two adjusting members are rotated relative to each other until either first plane part (9) abuts against the corresponding third plane part (12) and either second plane part (11) abuts against the corresponding second plane part (11), and the adjusting assembly (5) is in the original adjusting position.

5. The ultra-close pitch vacuum connection of claim 3, wherein: The two adjusting members are rotated relative to each other until either first plane part (9) abuts against the corresponding second plane part (11), and the adjusting assembly (5) is in the first adjusting position.

6. The ultra-close-pitch vacuum connection structure according to claim 3, characterized in that: When the two adjusting members are rotated to the point where either first plane part (9) abuts against the corresponding first plane part (9), the adjusting assembly (5) is in the second adjusting position.

7. The ultra-close-pitch vacuum connection structure according to claim 1, characterized in that: The number of inclined gear groups (8) is set to multiple, and the multiple inclined gear groups (8) are arranged around the central axis of the adjusting member.

8. The ultra-close-pitch vacuum connection structure according to claim 1, characterized in that: The outer circumferential surface of the adjusting component is provided with a plurality of fastening holes (14), which are used to insert fasteners to fix the adjusting component (5) to the sealing tube (3), thereby locking the axial length of the adjusting component (5).

9. The ultra-close-pitch vacuum connection structure according to claim 1, characterized in that: The conical sealing ring (4) has a conical part (15) and a circular part (16) at both ends along the axial direction; the outer peripheral surface of the conical part (15) is a conical surface that gradually tapers toward the carrier, and the end of the conical surface abuts against the carrier to form a circumferential seal, and the end face of the circular part (16) abuts against the adjusting component (5).

10. The ultra-close-pitch vacuum connection structure according to claim 3, characterized in that: The slope of the transition slope (13) is 15°-30°.

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