Height adjusting structure of honeycomb plate positioning tool

Abstract

The utility model provides a kind of height adjusting structure of honeycomb board positioning tool, belong to honeycomb board positioning tool technical field, the height adjusting structure of this honeycomb board positioning tool is used to adjust the perpendicular position of honeycomb board in tool, it is characterized by, including support seat, lifting rod and locking assembly;The support seat is inverted conical frustum structure, its top is provided with the sliding slot of longitudinal through, the cross section of the sliding slot is trapezoidal;The lifting rod is passed in the sliding slot, the outer circumferential surface of the lifting rod and the inner wall surface of the sliding slot are sliding fit;The locking assembly includes pressing block and connecting screw rod, one side of the pressing block is plane, other side is the arc concave surface compatible with the outer circumferential surface of the lifting rod, the utility model can solve the technical problem that the positioning tool of honeycomb board exists when being adjusted in height, insufficient adjustment accuracy and the position of adjustment is prone to deviation.

Description

Technical Field

[0001] This utility model belongs to the field of honeycomb panel positioning fixture technology, specifically, it relates to a height adjustment structure for a honeycomb panel positioning fixture. Background Technology

[0002] Honeycomb panels, due to their lightweight, high strength, and excellent sound absorption and heat insulation properties, are widely used in aerospace, architectural decoration, and industrial manufacturing. During the production and processing of honeycomb panels, specialized positioning fixtures are required for precise positioning to facilitate subsequent processing operations such as cutting, drilling, and bonding. Existing honeycomb panel positioning fixtures typically employ simple support columns or adjusting screw structures for height adjustment. These structures have significant shortcomings in the adjustment process. For example, while traditional threaded adjustment methods can achieve height changes, the adjustment accuracy is limited by the screw pitch, and the operation is cumbersome and time-consuming. More importantly, the locking mechanism after adjustment often uses a simple nut locking method, which is prone to loosening when the honeycomb panel is subjected to vibration, impact, or lateral forces during placement or processing, leading to height position deviation and inaccurate positioning, affecting processing accuracy and product quality. Furthermore, some existing fixtures using hydraulic or pneumatic adjustment methods offer convenient adjustment but are complex in structure, expensive, require a matching power system, and are difficult to maintain, making them unsuitable for small and medium-sized enterprises and workshops. Therefore, there is an urgent need to develop a honeycomb panel positioning fixture height adjustment structure that is simple in structure, precise in adjustment, reliable in locking, and cost-effective to meet actual production needs. Utility Model Content

[0003] In view of this, the present invention provides a height adjustment structure for a honeycomb panel positioning fixture, which can solve the technical problems of insufficient adjustment accuracy and easy position deviation after adjustment when the honeycomb panel positioning fixture is adjusted.

[0004] This utility model is implemented as follows:

[0005] This utility model provides a height adjustment structure for a honeycomb panel positioning fixture, used to adjust the vertical position of the honeycomb panel in the fixture. The structure includes a support base, a lifting rod, and a locking assembly. The support base has an inverted frustum-shaped structure with a longitudinally penetrating sliding groove at its top. The sliding groove has a trapezoidal cross-section. The lifting rod passes through the sliding groove, and its outer circumferential surface slides against the inner wall of the sliding groove. The locking assembly includes a clamping block and a connecting screw. One side of the clamping block is flat, and the other side is an arc-shaped concave surface adapted to the outer circumferential surface of the lifting rod. The connecting screw passes through the side wall of the support base and is threadedly connected to the clamping block, driving the clamping block to move radially along the support base to clamp the lifting rod.

[0006] The technical advantages of the height adjustment structure of the honeycomb panel positioning fixture provided by this utility model are as follows: By setting an inverted frustum-shaped support base and a lifting rod that cooperates with the sliding groove of its internal trapezoidal cross section, the height of the honeycomb panel can be precisely adjusted. The trapezoidal structure makes the lifting rod have good guidance and stability during the sliding process. The arc-shaped concave surface of the clamping block in the locking assembly cooperates with the outer circumferential surface of the lifting rod. The radial movement of the clamping block driven by the connecting screw realizes reliable locking of the lifting rod, avoiding height deviation caused by vibration or external force during the positioning of the honeycomb panel, ensuring the positioning accuracy and processing quality of the fixture. The overall structure is simple and compact and easy to operate.

[0007] Based on the above technical solution, the height adjustment structure of the honeycomb panel positioning fixture of this utility model can be further improved as follows:

[0008] In the trapezoidal cross-section of the sliding groove, the length of the upper base is less than the length of the lower base, and the cross-sectional shape of the lifting rod matches the cross-sectional shape of the sliding groove.

[0009] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: The sliding groove adopts a trapezoidal cross-section design with the upper bottom edge length being smaller than the lower bottom edge length. Combined with the lifting rod with a corresponding trapezoidal cross-section, a self-locking tendency is formed during the descent of the lifting rod, which effectively prevents the lifting rod from sliding down due to its own weight or external load, thus improving the stability after height adjustment. At the same time, the trapezoidal matching structure increases the contact area between the lifting rod and the sliding groove, disperses the bearing pressure, extends the service life, and ensures the adjustment accuracy during long-term use.

[0010] Furthermore, the cone angle of the frustoconical outer surface of the support is 15°~25°, and the bottom edge of the support extends outward to form an annular flange.

[0011] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: the frustoconical outer surface of the support base adopts a cone angle design of 15 to 25 degrees, which not only ensures that the support base has sufficient strength and rigidity, but also lowers the center of gravity of the overall structure and enhances stability; the annular flange formed by the outward extension of the bottom edge significantly expands the bottom contact area of ​​the support base, enhances the connection stability with the tooling base plate, effectively resists the overturning moment generated when the honeycomb panel is positioned, avoids positioning deviation caused by unstable support, and improves the reliability and safety of the entire adjustment structure under high load conditions.

[0012] Furthermore, the top of the lifting rod is provided with a platform portion, and the upper surface of the platform portion is provided with a plurality of evenly distributed mounting holes, which are circular and perpendicular to the upper surface of the platform portion.

[0013] The beneficial effects of adopting the above-mentioned improved scheme are as follows: a platform section is set at the top of the lifting rod and multiple evenly distributed circular mounting holes are opened on its upper surface, which provides a variety of installation position options for fixing the honeycomb panel or other accessories, and enhances the versatility and adaptability of the height adjustment structure; the design of the mounting holes being perpendicular to the upper surface of the platform section ensures the axial force state of the mounting bolts, avoids the adverse effects of eccentric loads on the lifting rod and support base, and improves the reliability of the connection. At the same time, the flat upper surface of the platform section provides a stable support reference surface for the honeycomb panel, ensuring positioning accuracy.

[0014] Furthermore, the radius of curvature of the arc-shaped concave surface of the clamping block is slightly larger than the radius of curvature of the outer circumference of the lifting rod, and the gap between the two is 0.2mm~0.5mm.

[0015] The beneficial effects of adopting the above-mentioned improved scheme are as follows: The radius of curvature of the arc-shaped concave surface of the clamping block is slightly larger than the radius of curvature of the outer circumference of the lifting rod, forming a precise clearance fit of 0.2mm~0.5mm. When the connecting screw drives the clamping block to move, it can make the clamping block and the lifting rod gradually fit together to generate a uniform clamping force, avoiding excessively concentrated point contact stress that could cause damage or deformation to the surface of the lifting rod. The appropriate clearance design also makes the clamping and releasing operations smoother, reduces operating force and friction wear, extends the service life of the locking components, and ensures the accuracy and repeatability of the locking position after height adjustment.

[0016] Furthermore, the inner wall of the sliding groove of the support base is provided with several parallel ribs along the longitudinal direction. The height of the ribs is 1mm to 3mm, which is used to reduce the contact area between the lifting rod and the sliding groove.

[0017] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: Several parallel ribs are set longitudinally on the inner wall of the sliding groove of the support seat. The design of the rib height of 1mm to 3mm effectively reduces the contact area between the lifting rod and the sliding groove, reduces the sliding friction resistance, and makes the up and down adjustment of the lifting rod easier and less laborious. The rib structure can also form a small lubricating oil film storage space between the lifting rod and the sliding groove, which improves the lubrication conditions and reduces wear. At the same time, the line contact method of the rib avoids the jamming phenomenon caused by large area contact, improves the flexibility and smoothness of the adjustment operation, and ensures the adjustment accuracy and reliability in long-term use.

[0018] Furthermore, the threaded section of the connecting screw is longer than the sum of the thickness of the side wall of the support base and the thickness of the clamping block, and an operating handle is provided at the end of the connecting screw.

[0019] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: The design that the length of the threaded section of the connecting screw is greater than the sum of the thickness of the side wall of the support seat and the thickness of the clamping block ensures that the connecting screw has sufficient adjustment stroke to adapt to different levels of clamping force requirements and wear compensation of the clamping block, thereby improving the adaptability and durability of the locking assembly; The operating handle at the end makes it easy for the operator to apply rotational torque, reducing the difficulty of operation and labor intensity. At the same time, the handle makes the locking and unlocking operations more intuitive and controllable, avoiding over-tightening or loosening due to improper operation, and ensuring the reliability and consistency of the lifting rod locking.

[0020] Furthermore, the angle between the two sides of the trapezoidal cross-section of the lifting rod and the horizontal plane is 5°~15°, and the lifting rod is marked with scale marks along its longitudinal direction.

[0021] The beneficial effects of adopting the above-mentioned improved scheme are as follows: the two waist sides of the trapezoidal cross-section of the lifting rod form an angle of 5 to 15 degrees with the horizontal plane. This tilt angle design allows the lifting rod to generate radial force through the interaction between the trapezoidal side and the inner wall of the sliding groove when bearing vertical load, forming a wedge-shaped self-locking effect, which further enhances the stability after height locking; the scale marks set along the longitudinal direction of the lifting rod provide operators with an intuitive height adjustment reference, which facilitates quick and accurate adjustment to the required height position, improves adjustment efficiency and repeatability accuracy, and reduces positioning deviation caused by human estimation error.

[0022] Furthermore, the support base is made of aluminum alloy, the lifting rod is made of stainless steel, and the clamping block is made of brass.

[0023] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: the support base is made of aluminum alloy, which is lightweight, strong, and corrosion resistant, reducing the overall weight of the tooling and facilitating movement and installation; the lifting rod is made of stainless steel, which has excellent wear resistance and deformation resistance, and can withstand frequent lifting and adjustment and large loads while maintaining good straightness and surface quality; the clamping block is made of brass, which has good self-lubricating properties and relatively soft hardness, and will not cause scratches or indentations on the stainless steel surface when clamping the lifting rod, thus extending the service life of the lifting rod. The reasonable combination of the three materials achieves comprehensive optimization of lightweight structure, durability and surface protection.

[0024] Furthermore, six fixing bolt holes are evenly distributed on the bottom annular flange of the support base. The axis of the fixing bolt holes is parallel to the axis of the sliding groove, which is used to fix the support base to the tooling base plate.

[0025] The beneficial effects of adopting the above-mentioned improved scheme are as follows: Six fixing bolt holes are evenly distributed on the bottom annular flange of the support base, and the design of the fixing bolt hole axis being parallel to the sliding groove axis ensures that the support base can be firmly installed on the tooling base plate by bolts. The even distribution of the six bolt holes ensures that the fastening force is evenly applied to the entire annular flange, avoiding deformation or loosening caused by local stress concentration. The parallel axis design ensures that the force direction of the mounting bolts is consistent with the working load direction of the lifting rod, maximizing the connection strength and stability, providing a reliable fixed foundation for the entire height adjustment structure, and ensuring the stable operation and accurate positioning of the honeycomb panel positioning tooling under various working conditions.

[0026] Compared with existing technologies, the beneficial effects of the height adjustment structure of the honeycomb panel positioning fixture provided by this utility model are as follows: This utility model fundamentally solves the problems of insufficient height adjustment accuracy and positional offset after adjustment in existing technologies by designing a lifting rod structure that matches an inverted frustum-shaped support base with a trapezoidal cross-section sliding groove, combined with a locking assembly consisting of a clamping block and a connecting screw. The trapezoidal matching structure and the rib design ensure both smooth sliding of the lifting rod and good guiding and self-locking effects. The precise matching between the arc-shaped concave surface of the clamping block and the lifting rod provides a uniform and reliable clamping force, ensuring accurate height adjustment. The stable locking mechanism is achieved after the initial setup. The frustum-shaped support base and the bottom annular flange design significantly improve the overall structural stability and anti-overturning capability. The multi-hole design of the platform enhances its versatility and adaptability. The rational selection of materials achieves comprehensive optimization of lightweight, wear-resistant, corrosion-resistant, and surface protection. The setting of scale marks improves adjustment efficiency and repeatability. The entire structure is simple, compact, easy to operate, and low in manufacturing cost. Compared with existing technologies, it significantly improves the adjustment accuracy, stability, and service life of the honeycomb panel positioning fixture, providing a reliable guarantee for the precise positioning and high-quality processing of honeycomb panels. It has good practical value and promising prospects for widespread application. Attached Figure Description

[0027] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 A front view of a height adjustment structure for a honeycomb panel positioning fixture;

[0029] Figure 2 A schematic diagram of a height adjustment structure for a honeycomb panel positioning fixture;

[0030] Figure 3A top view of the locking assembly of a height-adjustable structure for a honeycomb panel positioning fixture;

[0031] The attached diagram lists the components represented by each number as follows:

[0032] 10. Support base; 11. Sliding groove; 20. Lifting rod; 30. Locking assembly; 31. Pressing block; 32. Connecting screw; 40. Platform section. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0034] like Figure 1-3 The diagram shows an embodiment of a height adjustment structure for a honeycomb panel positioning fixture provided by this utility model. In this embodiment, it is used to adjust the vertical position of the honeycomb panel in the fixture. It includes a support base 10, a lifting rod 20, and a locking assembly 30. The support base has an inverted frustum-shaped structure with a longitudinally penetrating sliding groove 11 at its top. The cross-section of the sliding groove is trapezoidal. The lifting rod passes through the sliding groove, and its outer peripheral surface slides against the inner wall of the sliding groove. The locking assembly includes a pressing block 31 and a connecting screw 32. One side of the pressing block is a flat surface, and the other side is an arc-shaped concave surface that matches the outer peripheral surface of the lifting rod. The connecting screw passes through the side wall of the support base and is threadedly connected to the pressing block, which drives the pressing block to move along the radial direction of the support base to press the lifting rod.

[0035] In the above technical solution, the length of the upper bottom edge of the trapezoidal cross-section of the sliding groove is less than the length of the lower bottom edge, and the cross-sectional shape of the lifting rod matches the cross-sectional shape of the sliding groove.

[0036] Furthermore, in the above technical solution, the cone angle of the frustoconical outer surface of the support base is 15°~25°, and the bottom edge of the support base extends outward to form an annular flange.

[0037] Furthermore, in the above technical solution, the top of the lifting rod is provided with a platform part 40, and the upper surface of the platform part is provided with a plurality of evenly distributed mounting holes, which are circular and perpendicular to the upper surface of the platform part.

[0038] Furthermore, in the above technical solution, the radius of curvature of the arc-shaped concave surface of the clamping block is slightly larger than the radius of curvature of the outer circumference of the lifting rod, and the gap between the two is 0.2mm~0.5mm.

[0039] Furthermore, in the above technical solution, several parallel ribs are arranged longitudinally on the inner wall of the sliding groove of the support base. The height of the ribs is 1mm to 3mm, which is used to reduce the contact area between the lifting rod and the sliding groove.

[0040] Furthermore, in the above technical solution, the length of the threaded section of the connecting screw is greater than the sum of the thickness of the side wall of the support base and the thickness of the clamping block, and an operating handle is provided at the end of the connecting screw.

[0041] Furthermore, in the above technical solution, the angle between the two sides of the trapezoidal cross-section of the lifting rod and the horizontal plane is 5°~15°, and the lifting rod is marked with scale marks along the longitudinal direction.

[0042] Furthermore, in the above technical solution, the support base is made of aluminum alloy, the lifting rod is made of stainless steel, and the clamping block is made of brass.

[0043] Furthermore, in the above technical solution, six fixing bolt holes are evenly distributed on the bottom annular flange of the support base. The axis of the fixing bolt holes is parallel to the axis of the sliding groove, which is used to fix the support base to the tooling base plate.

[0044] First, secure the support base to the predetermined position on the tooling base plate using bolts through the six fixing bolt holes on the bottom annular flange, ensuring the support base is firmly installed and the axis of the sliding groove is perpendicular to the base plate plane. Insert the lifting rod into the sliding groove from the top of the support base. At this time, rotate the connecting screw to loosen the clamping block away from the lifting rod, ensuring that the lifting rod can slide freely in the sliding groove. According to the size requirements of the honeycomb panel to be positioned, move the lifting rod up and down to the appropriate height position by hand, and determine the accurate height value by observing the scale marks on the lifting rod. After reaching the predetermined height, rotate the operating handle at the end of the connecting screw clockwise to drive the clamping block to move radially along the support base and gradually tighten it. When you feel a significant increase in resistance while using the lifting rod, it indicates that the clamping block has fully clamped the lifting rod. At this point, stop rotating the operating handle to lock it in place. Place the honeycomb panel on the platform at the top of the lifting rod and secure it or its supporting accessories with bolts through the mounting holes on the platform. Subsequent processing can then proceed. After processing, rotate the operating handle counterclockwise to loosen the clamping block, allowing the lifting rod to move freely. After removing the honeycomb panel, the height can be readjusted for the next positioning. During long-term use, apply a small amount of lubricating oil to the sliding groove and the surface of the lifting rod periodically to maintain good sliding performance. Check the wear of the connecting screw and the clamping block and replace them if necessary to ensure a secure locking effect.

[0045] The following is a specific embodiment 1 of this utility model: In this embodiment, the support base is integrally formed from 6061 aluminum alloy material using a CNC machining center. The support base is in the shape of an inverted frustum of a square. The bottom surface of the frustum is a square with a side length of 120mm and a thickness of 15mm, the top surface is a square with a side length of 80mm, and the height of the frustum is 100mm. The inclination angle of the four inclined surfaces on the outer surface of the frustum is 20 degrees. A longitudinally penetrating sliding groove is opened at the center of the top surface of the support base. The sliding groove has a depth of 110mm and extends from the top surface to the bottom surface. The cross-section of the sliding groove is an isosceles trapezoid with an upper base width of 25mm, a lower base width of 35mm, and a height of 40mm. Four parallel ribs are milled evenly along the longitudinal direction on two opposite trapezoidal waist surfaces of the four inner walls. The ribs are 2mm high, 3mm wide, and 8mm apart. The top surfaces of the ribs are precision ground to achieve a surface roughness of Ra0.8. The bottom edge of the support base extends outward to form an annular flange 20mm wide and 10mm thick. Six 12mm diameter fixing bolt holes are evenly distributed along the circumference of the annular flange, with the bolt hole axis parallel to the sliding groove axis. The lifting rod is made of 304 stainless steel bar by turning and milling. The total length of the lifting rod is 400mm, and the cross-sectional shape is an isosceles trapezoid with an upper base width of 24.8mm, matching the sliding groove. The bottom edge is 34.8mm wide and 39.8mm high, ensuring a 0.1mm gap on one side between the lifting rod and the sliding groove. The two sides of the trapezoid form a 10-degree angle with the horizontal plane. A circular platform with a diameter of 80mm and a diameter of 40mm is machined at the top of the lifting rod. Eight threaded mounting holes with a diameter of 8mm and a depth of 15mm are evenly distributed along the circumference of the upper surface of the platform. The threads are M8 standard threads. A circular scale line is engraved every 10mm along the longitudinal direction on the outer surface of the lifting rod, with numerical graduations marked. The scale depth is 0.3mm. After oxidation treatment, black markings are filled in for easy reading. The clamping block is made of H62 brass and has a rectangular structure with a length of 40mm and a width of 3mm. The thickness is 20mm, with one side being flat and the other side having a 25mm radius arc-shaped recessed surface machined. The depth of the arc-shaped recessed surface is 8mm. Since the equivalent arc radius of the trapezoidal cross-section of the lifting rod is approximately 24.6mm, the gap between the recessed surface of the clamping block and the outer circumference of the lifting rod is approximately 0.4mm. The connecting screw is made of 45# steel, with a diameter of 16mm and a thread length of 80mm, using the M16 standard thread. A circular operating handle with a diameter of 50mm and a thickness of 10mm is machined at one end of the screw. The outer circumference of the handle is knurled to increase friction and facilitate hand operation. A 16mm diameter screw is drilled and machined in the middle of each of the two opposite side walls of the support base.A 5mm deep, 50mm threaded hole is used, with its axis pointing radially towards the center of the sliding groove. An M16 internal thread is machined within the threaded hole. A connecting screw is screwed into the threaded hole from the outside of the support base. The front end of the screw passes through the side wall of the support base and connects to the clamping block via a thread. The flat side of the clamping block faces the connecting screw, while the concave side faces the lifting rod. After the entire height adjustment structure is assembled, the lifting rod can smoothly slide 300mm within the sliding groove. When the operating handle of the connecting screw is rotated, the clamping block moves radially a maximum of 12mm, sufficient to effectively clamp and release the lifting rod. The entire structure weighs approximately 8.5kg and has a load-bearing capacity of up to 150kg. The lifting rod adjustment accuracy is ±0.5mm. After locking, under a combined 100kg vertical load and 20kg lateral force, the lifting rod's positional offset is less than 0.1mm, meeting the precision positioning requirements for honeycomb panels.

[0046] The following is another specific embodiment 2 of this utility model: This embodiment 2 is based on embodiment 1, and the trapezoidal cross-sectional shape of the sliding groove and the lifting rod is improved and optimized, changing the isosceles trapezoid to a right-angled trapezoid structure; the cross-section of the sliding groove of the support seat is a right-angled trapezoid with an upper base width of 25mm, a lower base width of 35mm, and a height of 40mm, one of the waist sides is perpendicular to the upper and lower base sides to form a 90-degree right angle, and the other waist side forms a 75-degree angle with the lower base side; the cross-section of the lifting rod is correspondingly changed to a right-angled trapezoid that matches the sliding groove, with a size slightly smaller by 0.2mm to form a fitting gap; this right-angled trapezoidal design makes the lifting rod have a clear directionality in the sliding groove, preventing the lifting rod from rotating during use, and is particularly suitable for application scenarios where honeycomb panel fixing accessories with directional requirements are installed on the platform; at the same time, the vertical contact of the right-angled sides provides a larger contact area, further enhancing the load-bearing capacity and stability of the structure. Under the same load conditions, the lateral force resistance of the right-angled trapezoidal structure is about 15% higher than that of the isosceles trapezoidal structure, making it more suitable for positioning conditions of large-size or eccentrically installed honeycomb panels.

[0047] The following is another specific embodiment 3 of this utility model: This embodiment 3 is based on embodiment 1, and adds rounded corner transition structures to the four corners of the trapezoidal cross-section of the lifting rod, with the radius of each rounded corner being 3mm. The rounded corner transition design eliminates sharp corners and reduces stress concentration, significantly improving the fatigue strength and service life of the lifting rod. Especially under conditions of frequent adjustment and impact load, the rounded corner structure can effectively prevent plastic deformation or cracking at the corners of the lifting rod. At the same time, the rounded corner transition makes the sliding of the lifting rod in the sliding groove smoother, reducing the wear debris and scratches caused by friction between the corners and the inner wall of the sliding groove, and maintaining the adjustment accuracy after long-term use. Correspondingly, a rounded corner transition of the same radius is also processed at the inner corner of the sliding groove of the support seat to ensure that the lifting rod and the sliding groove maintain a uniform fit gap. This double rounded corner fit design allows the adjustment accuracy of the entire height adjustment structure to remain within ±0.8mm after 10,000 lifting cycles, which is significantly better than the ±1.5mm accuracy decay of the sharp corner structure.

[0048] Specifically, the principle of this utility model is as follows: This utility model adopts an inverted frustum-shaped support base with a trapezoidal cross-section sliding groove. The trapezoidal cross-section of the lifting rod precisely matches the sliding groove. When the lifting rod moves up and down, the side of the trapezoidal structure forms multi-line contact with the inner wall of the sliding groove, providing good guidance and preventing the lifting rod from deflecting or swinging, thus ensuring the accuracy of vertical lifting. The design that the upper base of the trapezoidal cross-section is smaller than the lower base allows the lifting rod to generate a radial component force when it is subjected to a downward load, as the load is transmitted to the inner wall of the sliding groove through the trapezoidal side. This radial component force increases the normal pressure between the lifting rod and the sliding groove, thereby increasing the friction and forming a wedge-shaped self-locking effect, effectively preventing the lifting rod from sliding down on its own due to the load. The arc-shaped concave surface of the clamping block in the locking assembly matches the curvature of the outer circumference of the lifting rod. The rotation of the connecting screw drives the clamping block to move radially. When the clamping block gradually approaches the lifting rod, the arc-shaped concave surface... The surface and cylindrical surface form a progressive contact, generating a uniformly distributed clamping force that firmly presses the lifting rod into the sliding groove. This clamping method avoids stress concentration caused by point or line contact, ensuring reliable locking without damaging the lifting rod surface. The longitudinal ribs on the inner wall of the sliding groove transform the surface contact into line contact, significantly reducing sliding friction resistance and making adjustment easier. At the same time, the gaps between the ribs provide storage space for lubricant, improving lubrication conditions. The frustum-shaped shape of the support base and the bottom annular flange design increase the bottom support area, lower the center of gravity, and improve the overall structure's ability to resist overturning moments, ensuring stability under eccentric loads or lateral forces. In terms of material selection, the aluminum alloy support base achieves lightweighting, the stainless steel lifting rod ensures wear resistance and rigidity, and the brass clamping block provides self-lubricating properties and protects the lifting rod surface. The synergistic effect of these three materials achieves structural optimization and performance improvement.

[0049] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A height adjustment structure for a honeycomb panel positioning fixture, used to adjust the vertical position of the honeycomb panel in the fixture, characterized in that, The device includes a support base, a lifting rod, and a locking assembly. The support base has an inverted frustum-shaped structure with a longitudinally penetrating sliding groove at its top. The sliding groove has a trapezoidal cross-section. The lifting rod passes through the sliding groove, and its outer circumferential surface slides against the inner wall of the sliding groove. The locking assembly includes a clamping block and a connecting screw. One side of the clamping block is flat, and the other side is an arc-shaped concave surface that matches the outer circumferential surface of the lifting rod. The connecting screw passes through the side wall of the support base and is threadedly connected to the clamping block, thereby driving the clamping block to move radially along the support base to clamp the lifting rod.

2. The height adjustment structure of the honeycomb panel positioning fixture according to claim 1, characterized in that, In the trapezoidal cross-section of the sliding groove, the length of the upper base is less than the length of the lower base, and the cross-sectional shape of the lifting rod matches the cross-sectional shape of the sliding groove.

3. The height adjustment structure of the honeycomb panel positioning fixture according to claim 2, characterized in that, The cone angle of the frustoconical outer surface of the support is 15°~25°, and the bottom edge of the support extends outward to form an annular flange.

4. The height adjustment structure of a honeycomb panel positioning fixture according to claim 3, characterized in that, The top of the lifting rod is provided with a platform section, and the upper surface of the platform section has a plurality of evenly distributed mounting holes, which are circular and perpendicular to the upper surface of the platform section.

5. The height adjustment structure of a honeycomb panel positioning fixture according to claim 4, characterized in that, The radius of curvature of the arc-shaped concave surface of the clamping block is slightly larger than the radius of curvature of the outer circumference of the lifting rod, and the gap between the two is 0.2mm~0.5mm.

6. The height adjustment structure of a honeycomb panel positioning fixture according to claim 5, characterized in that, The inner wall of the sliding groove of the support base is provided with several parallel ribs along the longitudinal direction. The height of the ribs is 1mm to 3mm, which are used to reduce the contact area between the lifting rod and the sliding groove.

7. The height adjustment structure of a honeycomb panel positioning fixture according to claim 6, characterized in that, The threaded section of the connecting screw is longer than the sum of the thickness of the side wall of the support base and the thickness of the clamping block, and an operating handle is provided at the end of the connecting screw.

8. The height adjustment structure of a honeycomb panel positioning fixture according to claim 7, characterized in that, The angle between the two sides of the trapezoidal cross-section of the lifting rod and the horizontal plane is 5° to 15°, and the lifting rod is marked with scale marks along its longitudinal direction.

9. The height adjustment structure of a honeycomb panel positioning fixture according to claim 8, characterized in that, The support base is made of aluminum alloy, the lifting rod is made of stainless steel, and the clamping block is made of brass.

10. The height adjustment structure of a honeycomb panel positioning fixture according to claim 9, characterized in that, The bottom annular flange of the support base has six fixing bolt holes evenly distributed. The axis of the fixing bolt holes is parallel to the axis of the sliding groove, which is used to fix the support base to the tooling base plate.

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