Spacing self-adjusting bicycle titanium alloy water bottle rack 3D printing device

Abstract

The present application relates to the field of 3D printing processing equipment, and particularly relates to a 3D printing device for bicycle titanium alloy kettle rack with self-adjusting distance, which comprises a 3D printing device body, a printer door, a movable nozzle and a titanium alloy kettle rack body. The adjusting mechanism can compensate the distance of the arc surface change of the titanium alloy kettle rack body, so as to improve the forming precision and surface flatness of the arc surface of the titanium alloy kettle rack body. The printing nozzle of the printing device is fixedly installed, and only single direction displacement of the nozzle can be used to complete the printing operation. The nozzle cannot adapt to the complex arc surface structure of the kettle rack. In the printing process, the distance between the nozzle and the arc surface of the model is always in a deviation state, which is prone to cause problems such as accumulation of consumables, protruding defects, uneven spraying, obvious layer lines and loose forming due to too large distance between the arc recess positions.

Description

Technical Field

[0001] This invention relates to the field of 3D printing equipment, specifically a 3D printing device for a bicycle titanium alloy water bottle holder with self-adjusting spacing. Background Technology

[0002] Titanium alloy water bottle cages for bicycles have become a key component in high-end cycling equipment due to the comprehensive advantages of titanium alloy, including high strength, light weight, corrosion resistance, and fatigue resistance. Compared to traditional aluminum alloy and plastic water bottle cages, titanium alloy water bottle cages have more stringent requirements for molding precision, surface flatness, structural consistency, and internal density. Currently, the mainstream processing method for titanium alloy water bottle cages is 3D printing (such as selective laser melting and electron beam melting). This process can adapt to personalized customization needs and the processing requirements of complex irregular curved structures, making it particularly suitable for the production of small batches and a variety of high-end bicycle accessories.

[0003] However, existing 3D printing equipment still faces significant technical bottlenecks when actually processing curved surface bottle holders: First, the printheads of these devices typically employ a fixed mounting structure, limiting their movement to linear displacement in the three orthogonal directions of X, Y, and Z. This prevents them from adjusting the printhead posture or the distance between the printhead and the workpiece surface in real time according to the curvature changes of the curved surface. Second, during printing, the vertical distance between the printhead and the curved surface of the model continuously deviates due to the surface's unevenness. When the printhead moves to a raised section, a small distance can lead to excessive accumulation of molten material, resulting in raised imperfections and a grainy surface. Conversely, when the printhead moves to a recessed section, a large distance can cause uneven powder or droplet spraying, resulting in noticeable layer textures, loose molding, and insufficient interlayer bonding, ultimately severely impacting the mechanical properties and appearance quality of the bottle holder. These shortcomings limit the application of existing 3D printing equipment in the manufacturing of high-end titanium alloy bottle holders. Summary of the Invention

[0004] To overcome the shortcomings of existing technologies and solve the problems of low molding accuracy and poor surface quality caused by the inability of the fixed nozzle installation structure to adapt to the complex curved surface of the water bottle holder and the deviation in the distance between the nozzle and the curved surface, this invention proposes a 3D printing device for a bicycle titanium alloy water bottle holder with self-adjusting spacing. By introducing a dynamic spacing compensation mechanism, it can realize real-time tracking and compensation for changes in the curved surface, thereby significantly improving molding accuracy and surface flatness.

[0005] The technical solution adopted by this invention to solve its technical problem is:

[0006] A 3D printing device for a bicycle titanium alloy water bottle holder with self-adjusting spacing includes a 3D printing equipment body, a printer door, a movable nozzle, and a titanium alloy water bottle holder body. An installation box is fixedly installed on the inner wall of the 3D printing equipment body. A sliding cover is slidably fitted inside the installation box along the vertical direction. An adjustment mechanism is provided between the installation box and the sliding cover.

[0007] The adjustment mechanism includes: a first motor, fixedly installed inside the sliding cover, with its output end coaxially driven to a kettle mold, for driving the kettle mold to rotate around its own axis; a second motor, fixedly installed on the outside of the mounting box, with its output end driven to a cam, the wheel surface of the cam engaging with the bottom surface of the sliding cover, for converting the rotational motion of the second motor into the lifting motion of the sliding cover; a sliding frame, fixedly connected to the bottom of the sliding cover, with a slide rod fixedly connected below it; a sleeve, fixedly installed on the inner wall of the 3D printing equipment body, with the slide rod and the sleeve forming a vertical sliding guide engagement; and a spring, sleeved outside the slide rod and abutting between the sliding frame and the sleeve, for providing an elastic restoring force for the sliding cover towards the cam direction.

[0008] As a further preferred technical solution of the present invention, the sliding cover and the inner wall of the mounting box form a circumferential limiting fit, and the sliding cover has only a vertical reciprocating sliding degree of freedom under the pushing action of the cam and the restoring action of the spring.

[0009] As a further preferred technical solution of the present invention, the wheel surface of the cam and the bottom surface of the sliding cover form a rolling push-fit engagement, and the inner wall of the mounting box is fixedly provided with a fitting pad. The non-working wheel surface of the cam and the surface of the fitting pad form a rolling fitting engagement, which is used to reduce friction loss and constrain the radial movement of the cam.

[0010] As a further preferred technical solution of the present invention, a stabilizing frame is fixedly provided on the inner wall of the sliding cover, a limiting groove is provided on the top of the stabilizing frame, and a limiting plate is provided on the free end of the kettle mold. The limiting plate and the limiting groove of the stabilizing frame form a horizontal sliding limiting fit, which is used to support the free end of the kettle mold and constrain its radial sway.

[0011] As a further preferred technical solution of the present invention, the inner wall of the sliding cover is also provided with a storage box, and the storage box and the inner wall of the sliding cover form a drawer-type pull-out sliding fit. The bottom of the storage box and the inner wall of the sliding cover form a detachable fixed fit by magnetic attraction, which is used to collect metal powder that falls off during the printing process.

[0012] As a further preferred technical solution of the present invention, a placement platform is fixedly provided on the inner wall of the 3D printing equipment body, and a protective pad is embedded on the upper surface of the placement platform. The protective pad forms a flexible contact support with the bottom of the titanium alloy kettle frame to avoid direct contact between the high-temperature workpiece and the rigid platform.

[0013] As a further preferred technical solution of the present invention, an installation rod is fixedly provided on the inner wall of the 3D printing equipment body, and a breathable mesh is slidably sleeved on the installation rod. The breathable mesh and the installation rod form a push-pull detachable sliding fit, which is used to isolate external dust and maintain ventilation and heat dissipation inside the equipment.

[0014] As a further preferred technical solution of the present invention, the adjustment mechanism further includes a controller, which forms an electrical signal cooperation with the first motor, the second motor and the driving system of the moving nozzle respectively; the controller has a built-in spacing compensation calculation module, which is used to calculate the theoretical spacing deviation value between the moving nozzle and the surface of the kettle mold based on the real-time position of the moving nozzle and the preset arc-shaped surface path parameters, and output a driving signal to the second motor according to the deviation value, so that the second motor drives the cam to rotate by a predetermined angle, so as to dynamically change the lifting displacement of the sliding cover, forming a closed-loop dynamic compensation cooperation of the nozzle-workpiece spacing.

[0015] The advantages of this invention are:

[0016] This invention, through the setting of an adjustment mechanism, utilizes a second motor to drive the cam to rotate, causing the cam wheel surface to form a pushing engagement with the bottom surface of the sliding cover. Simultaneously, the sliding guide engagement between the slide rod and the sleeve, and the elastic reset engagement of the spring against the sliding frame and the sleeve, dynamically compensate for the real-time distance deviation between the moving nozzle and the curved surface of the kettle mold. This ensures that the nozzle and workpiece surface maintain the optimal printing distance, effectively solving problems such as material accumulation, raised defects, uneven spraying, and obvious layer textures caused by the unevenness of the curved surface. It significantly improves the forming accuracy and surface flatness of the curved surface of the titanium alloy kettle holder. Furthermore, the coaxial transmission between the first motor and the kettle mold drives the kettle mold to rotate at a uniform speed, combined with the linear scanning motion of the moving nozzle, achieving continuous and uniform deposition on the annular curved surface of the kettle holder. This avoids seam defects caused by segmented scanning, improving... This design achieves both printing efficiency and structural consistency. The circumferential limiting fit between the sliding cover and the inner wall of the mounting box restricts the sliding cover to only have vertical reciprocating sliding freedom, effectively preventing horizontal offset or rotation during lifting and ensuring positional accuracy between the kettle mold and the moving printhead. The sliding limiting fit between the top limiting groove of the stabilizing frame and the limiting disc provides effective radial support to the free end of the kettle mold, preventing bending deformation under long-term rotational stress and ensuring rotational coaxiality. The rolling contact fit between the cam wheel surface and the contact pad surface reduces friction loss and constrains radial movement of the cam, improving transmission accuracy and component lifespan. The drawer-type sliding fit and magnetic attraction fixation between the storage box and the sliding cover facilitate the collection and cleaning of titanium alloy powder scattered during printing, enabling material recycling. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of the present invention;

[0019] Figure 2 This is a schematic diagram of the internal structure of the present invention;

[0020] Figure 3 For the present invention Figure 2 Schematic diagram of the structure at point A;

[0021] Figure 4 This is a schematic diagram of the internal component structure of the present invention;

[0022] Figure 5This is a first-view cross-sectional structural diagram of the internal components in this invention;

[0023] Figure 6 This is a second-view cross-sectional structural diagram of the internal components in this invention;

[0024] Figure 7 This is a schematic diagram of the sliding frame in this invention.

[0025] In the diagram: 1. 3D printer body; 2. Printer door; 3. Moving nozzle; 4. Ventilation mesh; 5. Mounting rod; 6. Placement platform; 7. Protective pad; 8. Adjustment mechanism; 801. First motor; 802. Kettle mold; 803. Second motor; 804. Sliding frame; 805. Sliding rod; 806. Sleeve; 807. Spring; 808. Cam; 9. Mounting box; 10. Fitting pad; 11. Sliding cover; 12. Titanium alloy kettle holder; 13. Storage box; 14. Stabilizing frame; 15. Limiting disc. Detailed Implementation

[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] The following is in conjunction with the appendix Figure 1-7 This application will be described in further detail.

[0028] The following is in conjunction with the appendix Figure 1-7 This application will be described in further detail.

[0029] Example 1

[0030] Please refer to Figure 1 and Figure 2 This invention provides a 3D printing device for a self-adjusting titanium alloy water bottle holder for bicycles, mainly comprising a 3D printing equipment body 1, a printer door 2, a movable nozzle 3, and a titanium alloy water bottle holder body 12 to be formed. The 3D printing equipment body 1 is a closed box structure, with the printer door 2 hinged to its front side for easy loading and unloading of workpieces and equipment maintenance by the operator. The movable nozzle 3 is installed on a gantry-type three-axis slide rail system inside the 3D printing equipment body 1 (the specific structure of the slide rail is not shown in the figure and belongs to the prior art), and can move independently in the X, Y, and Z directions to realize a spatial scanning path.

[0031] Please refer to the following carefully. Figures 2 to 7A mounting box 9 is fixedly installed on the bottom inner wall of the 3D printing equipment body 1. The mounting box 9 is a square shell structure with an open top. A sliding cover 11 is slidably fitted inside the mounting box 9 in the vertical direction. That is, the outline of the sliding cover 11 is adapted to the inner cavity of the mounting box 9 and can only slide up and down in the vertical direction. An adjustment mechanism 8 is provided between the mounting box 9 and the sliding cover 11. The adjustment mechanism 8 is used to dynamically adjust the height position of the kettle mold 802.

[0032] The adjustment mechanism 8 is specifically configured as follows: it includes a first motor 801, which is fixedly mounted on the bottom of the inner wall of the sliding cover 11, with its output shaft extending vertically upward. The output end of the first motor 801 is coaxially driven to a kettle mold 802 via a coupling or key connection, meaning the first motor 801 drives the kettle mold 802 to rotate around its own axis. The outer contour of the kettle mold 802 matches the shape of the inner cavity of the titanium alloy kettle rack to be formed, and it is generally made of high-temperature resistant stainless steel or ceramic material.

[0033] A second motor 803 is fixedly mounted on the right outer wall of the mounting box 9. The output shaft of the second motor 803 extends horizontally into the mounting box 9, and its output end is driven by a cam 808. The profile curve of the cam 808 is an eccentric circle or a gradient curve, used to convert the rotational motion into the reciprocating lifting motion of the sliding cover 11. Specifically, the wheel surface of the cam 808 pushes against the bottom surface of the sliding cover 11. When the second motor 803 drives the cam 808 to rotate, the distal or proximal end of the cam 808 alternately pushes upward against the bottom surface of the sliding cover 11, thereby converting the rotational motion of the second motor 803 into the lifting motion of the sliding cover 11.

[0034] A sliding frame 804 is fixedly connected to the bottom center of the sliding cover 11. The sliding frame 804 is an inverted U-shaped or frame structure, and a sliding rod 805 (preferably two symmetrically arranged in this embodiment) is fixedly connected to its bottom. A sleeve 806 corresponding to the number of sliding rods 805 is fixedly provided on the bottom inner wall of the 3D printing equipment body 1. The lower end of the sliding rod 805 extends into the sleeve 806, and a vertical sliding guide fit is formed between the sliding rod 805 and the sleeve 806, providing precise guiding constraints for the lifting and lowering of the sliding cover 11. A spring 807 is sleeved on the outside of the sliding rod 805, with its upper end abutting the bottom surface of the sliding frame 804 and its lower end abutting the upper end surface of the sleeve 806 or the inner wall of the equipment. That is, the spring 807 abuts between the sliding frame 804 and the sleeve 806, always providing an upward elastic force to provide an elastic restoring force for the sliding cover 11 toward the cam 808.

[0035] Specifically, before operation, the operator inserts the limiting disc 15 into the stabilizing frame 14 (the specific structure will be described later) to support the free end of the kettle mold 802. Then, the equipment is started, and the moving nozzle 3, driven by the control system, moves along a preset path to the starting printing position of the kettle mold 802. At this time, the first motor 801 starts, driving the kettle mold 802 to rotate uniformly around its axis via coaxial transmission (typically 0.5~5 r / min, adjustable according to the printing layer thickness and material characteristics). Simultaneously, the moving nozzle 3 slowly moves along the generatrix direction (i.e., axial direction) of the kettle mold 802 and performs spraying according to the melting and deposition process of titanium alloy powder or filament.

[0036] During this process, the control system monitors the vertical distance between the moving printhead 3 and the current printing layer surface in real time. When the printhead moves to the arc-shaped protrusion area of ​​the kettle mold 802, the distance decreases. At this time, the control system sends a command to the second motor 803, driving the second motor 803 to rotate at a certain angle, so that the distal end of the cam 808 gradually pushes the bottom surface of the sliding cover 11 upward, overcoming the pressure of the spring 807 and causing the sliding cover 11 and the kettle mold 802 to rise as a whole, thereby increasing the distance between the printhead and the workpiece surface and restoring it to the preset optimal value. Conversely, when the printhead moves to the arc-shaped concave area, the distance increases, and the control system controls the second motor 803 to rotate in the opposite direction, so that the proximal end of the cam 808 faces upward, and the sliding cover 11 descends under the elastic restoring force of the spring 807, reducing the distance. Through the above real-time and continuous dynamic compensation, the printing distance between the printhead and the workpiece surface is ensured to remain accurate at all times.

[0037] After all printing layers are completed, turn off the first motor 801 and the second motor 803. After the titanium alloy water bottle holder 12 cools to room temperature, open the printer door 2, first remove the limiting plate 15 from the stabilizing frame 14, and then gently push the titanium alloy water bottle holder 12 along the axial direction towards the stabilizing frame 14 to separate it from the water bottle mold 802, so that the finished product can be completely removed.

[0038] Example 2

[0039] Please refer to Figure 2 and Figure 3 As one of the core mating relationships of this invention, a circumferential limiting fit is formed between the sliding cover 11 and the inner wall of the mounting box 9. Specifically, the outer contour of the sliding cover 11 is non-circular (e.g., rectangular or with a guide groove), and the inner cavity of the mounting box 9 is adapted to it, thereby constraining the sliding cover 11 to have only a vertical reciprocating sliding degree of freedom, preventing it from horizontally shifting or rotating around the vertical axis during lifting and lowering. This limiting fit ensures that the positional accuracy between the kettle mold 802 and the moving nozzle 3 is not affected by the lifting and lowering action of the sliding cover.

[0040] Please refer to the following carefully. Figure 6As an optimized structure for transmission, the wheel surface of cam 808 forms a rolling push-fit engagement with the bottom surface of sliding cover 11. A contact pad 10 is fixedly provided on the inner wall of mounting box 9, preferably made of wear-resistant polytetrafluoroethylene or bronze composite material. The non-working wheel surface of cam 808 forms a rolling contact engagement with the surface of contact pad 10, meaning that when cam 808 rotates, its back side always remains in contact with and rolls relative to contact pad 10. This engagement structure reduces frictional loss between cam 808 and the inner wall of mounting box 9, and also provides radial constraint on cam 808, preventing radial movement during rotation, thus improving transmission accuracy and component lifespan.

[0041] Please refer to Figure 4 and Figure 5 As a supporting structure for the kettle mold, a stabilizing frame 14 is fixedly installed on the inner wall of the sliding cover 11. The stabilizing frame 14 is an L-shaped or triangular support structure with a limiting groove on its top. A limiting disc 15 is provided at the free end of the kettle mold 802. The limiting disc 15 is a disc-shaped part with a positioning hole in its center that mates with the end of the kettle mold 802. The limiting disc 15 is embedded in the limiting groove of the stabilizing frame 14, forming a horizontal sliding limiting fit between the two. This fit structure is used to support the free end of the kettle mold 802 and constrain its radial sway, preventing the mold from bending and deforming due to excessive overhang during rotation, ensuring rotational coaxiality and uniform printing layer thickness. At the same time, the limiting disc 15 also serves to limit the shape of the tail of the titanium alloy kettle holder 12, so that the tail of the kettle holder can form a regular tapered structure.

[0042] Example 3

[0043] Please refer to Figure 4 and Figure 7 The inner wall of the sliding cover 11 is also equipped with a storage box 13, which is located beside the first motor 801. The storage box 13 and the inner wall of the sliding cover 11 form a drawer-type sliding fit, meaning the storage box 13 can be pulled out or pushed in horizontally from the side of the sliding cover 11. A magnet is embedded in the bottom of the storage box 13, and a ferromagnetic metal sheet is embedded in the corresponding position on the inner wall of the sliding cover 11. The two are magnetically attracted to form a detachable and fixed fit. This fit structure facilitates the operator to periodically remove the storage box 13 to clean the collected metal powder, and also reliably fixes the storage box 13 during equipment operation, preventing it from sliding out due to vibration. The storage box 13 is used to collect titanium alloy powder that falls or splashes from the surface of the water jug ​​mold 802 during printing, keeping the inside of the equipment clean and simultaneously recovering precious metal materials.

[0044] Please refer to Figure 3A placement platform 6 is fixedly installed on the inner wall of the 3D printing equipment body 1. The placement platform 6 is a flat structure located on the right side of the inner wall of the equipment. A protective pad 7 is embedded on the upper surface of the placement platform 6. The protective pad 7 is preferably a high-temperature resistant silicone pad or a ceramic fiber pad. The protective pad 7 forms a flexible contact support with the bottom of the titanium alloy kettle holder 12. After the titanium alloy kettle holder 12 is printed, the operator can temporarily place it on the placement platform 6. The protective pad 7 can prevent the high-temperature workpiece from directly contacting the metal platform surface to avoid heat conduction damage or cross-contamination, and at the same time prevent the workpiece surface from being scratched.

[0045] Please continue to refer to Figure 3 A mounting rod 5 is fixedly installed on the rear inner wall of the 3D printing equipment body 1, and the mounting rod 5 is arranged horizontally. A ventilated mesh 4 is slidably fitted on the mounting rod 5. The ventilated mesh 4 is a porous metal mesh or plastic mesh. The ventilated mesh 4 and the mounting rod 5 form a push-pull detachable sliding fit, and the operator can push and pull the ventilated mesh 4 along the mounting rod 5 to install or remove it. The second motor 803 generates a certain amount of heat during operation. The ventilated mesh 4 can ensure air circulation inside the equipment, exhaust hot air, and at the same time isolate larger dust and debris from the outside, protecting the motor and precision components such as the slide rail.

[0046] Example 4

[0047] Please refer to Figure 2 and Figure 5 As an intelligent improvement of the present invention, the adjustment mechanism 8 also includes a controller (not shown in the figure, which can be installed outside or inside the 3D printing equipment body 1). The controller forms an electrical signal cooperation with the drive systems of the first motor 801, the second motor 803 and the moving nozzle 3, that is, the controller can send control commands to the above-mentioned components and receive feedback signals.

[0048] The controller has a built-in spacing compensation calculation module (which can be implemented via embedded software or FPGA). This module is used to calculate the theoretical spacing deviation between the moving nozzle 3 and the surface of the kettle mold 802 based on the real-time position of the moving nozzle 3 and the preset arc-shaped surface path parameters. Specifically, the controller has pre-stored the three-dimensional surface model data of the kettle mold 802. When the moving nozzle 3 moves to a certain coordinate position, the controller queries the theoretical surface height corresponding to that position and compares it with the current actual height of the moving nozzle 3 to obtain the deviation. Based on this deviation value, the controller outputs a drive signal to the second motor 803, causing the second motor 803 to drive the cam 808 to rotate by a predetermined angle, thereby dynamically changing the lifting displacement of the sliding cover 11, thus forming a closed-loop dynamic compensation fit for the nozzle-workpiece spacing. This control system can adopt PID closed-loop or fuzzy control strategies to further suppress overshoot and oscillation, and improve the compensation response speed and accuracy.

[0049] The above are merely preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

[0050] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention.

Claims

1. A 3D printing device for a bicycle titanium alloy water bottle holder with self-adjusting spacing, comprising a 3D printing equipment body (1), a printer door (2), a movable nozzle (3), and a titanium alloy water bottle holder body (12), characterized in that: The inner wall of the 3D printing equipment body (1) is fixedly provided with an installation box (9), and a sliding cover (11) is slidably fitted inside the installation box (9) along the vertical direction. An adjustment mechanism (8) is provided between the installation box (9) and the sliding cover (11). The adjustment mechanism (8) includes: The first motor (801) is fixedly installed inside the sliding cover (11), and its output end is coaxially driven with the kettle mold (802) to drive the kettle mold (802) to rotate around its own axis. The second motor (803) is fixedly installed on the outside of the mounting box (9), and its output end is driven by a cam (808). The wheel surface of the cam (808) pushes against the bottom surface of the sliding cover (11) to convert the rotational motion of the second motor (803) into the lifting motion of the sliding cover (11). The sliding frame (804) is fixedly connected to the bottom of the sliding cover (11), and a sliding rod (805) is fixedly connected below it. The sleeve (806) is fixedly installed on the inner wall of the 3D printing equipment body (1), and the slide rod (805) and the sleeve (806) form a vertical sliding guide fit; A spring (807) is sleeved outside the slide bar (805) and abuts between the slide frame (804) and the sleeve (806) to provide an elastic restoring force for the slide cover (11) toward the cam (808).

2. The 3D printing device for a self-adjusting titanium alloy bicycle water bottle holder according to claim 1, characterized in that: The sliding cover (11) and the inner wall of the mounting box (9) form a circumferential limiting fit. Under the pushing action of the cam (808) and the reset action of the spring (807), the sliding cover (11) only has a vertical reciprocating sliding degree of freedom.

3. The 3D printing device for a bicycle titanium alloy water bottle holder with self-adjusting spacing according to claim 1, characterized in that: The wheel surface of the cam (808) and the bottom surface of the sliding cover (11) form a rolling push fit. The inner wall of the mounting box (9) is fixedly provided with a fitting pad (10). The non-working wheel surface of the cam (808) and the surface of the fitting pad (10) form a rolling fitting fit to reduce friction loss and constrain the radial movement of the cam (808).

4. The 3D printing device for a bicycle titanium alloy water bottle holder with self-adjusting spacing according to claim 1, characterized in that: The inner wall of the sliding cover (11) is fixedly provided with a stabilizing frame (14). The top of the stabilizing frame (14) is provided with a limiting groove. The free end of the kettle mold (802) is provided with a limiting plate (15). The limiting plate (15) and the limiting groove of the stabilizing frame (14) form a horizontal sliding limiting fit, which is used to support the free end of the kettle mold (802) and constrain its radial sway.

5. The 3D printing device for a self-adjusting titanium alloy bicycle water bottle holder according to claim 1, characterized in that: The inner wall of the sliding cover (11) is also provided with a storage box (13). The storage box (13) and the inner wall of the sliding cover (11) form a drawer-type pull-out sliding fit. The bottom of the storage box (13) and the inner wall of the sliding cover (11) form a detachable fixed fit through magnetic attraction, which is used to collect metal powder that falls off during the printing process.

6. The 3D printing device for a self-adjusting titanium alloy bicycle water bottle holder according to claim 1, characterized in that: The inner wall of the 3D printing equipment body (1) is fixedly provided with a placement platform (6), and a protective pad (7) is embedded on the upper surface of the placement platform (6). The protective pad (7) forms a flexible contact support with the bottom of the titanium alloy water bottle holder (12).

7. The 3D printing device for a bicycle titanium alloy water bottle holder with self-adjusting spacing according to claim 1, characterized in that: The inner wall of the 3D printing equipment body (1) is fixedly provided with an installation rod (5), and a breathable mesh (4) is slidably sleeved on the installation rod (5). The breathable mesh (4) and the installation rod (5) form a push-pull detachable sliding fit, which is used to isolate external dust and maintain ventilation and heat dissipation inside the equipment.

8. The 3D printing device for a self-adjusting titanium alloy bicycle water bottle holder according to claim 1, characterized in that: The adjustment mechanism (8) also includes a controller, which forms an electrical signal coordination with the drive systems of the first motor (801), the second motor (803) and the moving nozzle (3); The controller has a built-in spacing compensation calculation module, which is used to calculate the theoretical spacing deviation between the moving nozzle (3) and the surface of the kettle mold (802) based on the real-time position of the moving nozzle (3) and the preset arc surface path parameters, and output a drive signal to the second motor (803) based on the deviation value, so that the second motor (803) drives the cam (808) to rotate by a predetermined angle, so as to dynamically change the lifting displacement of the sliding cover (11) and form a closed-loop dynamic compensation fit between the nozzle and the workpiece.

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