A small 3D printed model fixing fixture
By designing a four-way synchronous positioning structure for the fixing fixture, the multi-dimensional fixing problem of small 3D printed model fixtures in the existing technology was solved, realizing the stable clamping and efficient processing of irregular models.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- HANGZHOU HIMALAYA INFORMATION TECH
- Filing Date
- 2026-06-02
- Publication Date
- 2026-06-30
AI Technical Summary
Existing fixtures for small 3D printed models mostly clamp in a single direction, making it difficult to achieve stable fixation in multiple dimensions. This is especially true when clamping irregularly shaped models, which are prone to slippage and displacement. Furthermore, different shapes of models require different fixtures, increasing costs and reducing process efficiency.
Design a four-way synchronous positioning structure including components such as positioning seat, tightening plate, and positioning block. Through the combination of left and right clamping and front and back clamping, multi-dimensional positioning can be achieved, which can be adapted to models of different shapes such as spheres, cuboids, and cylinders without changing the fixture.
It achieves multi-dimensional model fixation, avoids slippage and offset, improves the adaptability and stability of irregular models, simplifies the fixture replacement process, and improves the stability and efficiency of processing and inspection.
Smart Images
Figure CN122299541A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of 3D printing auxiliary equipment technology, specifically a small 3D printing model fixing fixture. Background Technology
[0002] In aerospace, automotive manufacturing, and precision instrument processing, 3D printing technology has been widely used due to its advantages of flexible molding and personalized customization. A large number of small 3D printed models and parts are manufactured. In subsequent processes such as polishing, inspection, and assembly, these small models need to be positioned and clamped with the help of fixed fixtures to ensure processing accuracy and operational stability.
[0003] A search revealed Chinese patent application CN202220814000.5, which discloses a model fixture for a 3D printer, belonging to the field of 3D printers. The key technical features include a printing platform mounted on the 3D printer, with drive components at both ends of the printing platform. Each drive component has a mounting arm, which includes a lifting cylinder vertically fixed to the drive component. A horizontal crossbar is mounted on the lifting cylinder, and a pressure plate is fixed to one end of the crossbar facing the inside of the printing platform. The crossbar includes an outer tube and an inner rod slidably connected to the outer tube. The outer tube is connected to the lifting cylinder, and a fixing component for fixing the inner rod is provided between the outer tube and the inner rod. This invention has the advantages of adjustable height and length of the mounting arm, improving the applicability of the pressure plate.
[0004] Regarding the aforementioned technologies, the inventors discovered the following drawbacks: While the above-mentioned technologies can improve the applicability of the clamping plate, most of their small 3D printed model fixing fixtures are single-directional clamping structures, typically only capable of unidirectional tightening from left to right, making it difficult to securely fix the model in multiple dimensions. When clamping irregularly shaped models such as spheres and cylinders, these fixtures are prone to model slippage and displacement, failing to meet the requirements of high-precision processing. Furthermore, different sizes of fixtures are often required for 3D printed models of different shapes, increasing production costs and reducing the efficiency of process switching. Therefore, it is essential to design a practical, multi-directional, synchronously tightening, and adaptable small 3D printed model fixing fixture suitable for various shapes. Summary of the Invention
[0005] The purpose of this invention is to provide a small 3D printed model fixing fixture to solve the problems mentioned in the background art.
[0006] To solve the above technical problems, the present invention provides the following technical solution: a small 3D printed model fixing fixture, including a base, a positioning seat fixedly connected to the upper side of the base, a movable groove opened on the upper side of the base, a movable lead screw rotatably fitted on one side of the inner wall of the movable groove, a moving block threaded on the movable lead screw, a tightening block fixedly connected to the upper side of the moving block, a linkage groove opened on the upper side of the tightening block, a movable opening opened on one side of the inner wall of the linkage groove, and a force-bearing block slidably fitted on the inner wall of the movable opening; A tightening plate is fixedly connected to one side of the force-bearing block, and a trapezoidal groove is provided on the other side of the force-bearing block. Two clamping blocks that cooperate with the trapezoidal groove are slidably fitted on the lower side of the inner wall of the linkage groove. A positioning component is provided on the opposite side of the clamping blocks, and a drive motor that cooperates with the movable lead screw is provided on one side of the base.
[0007] According to the above technical solution, the positioning component includes an L-shaped block fixedly connected to the opposite side of the two clamping blocks, and a positioning block fixedly connected to the adjacent side of the inner wall of the two L-shaped blocks. Both L-shaped blocks extend to one side of the tightening block and are slidably engaged.
[0008] According to the above technical solution, a guide groove is fixedly connected to the lower side of the inner wall of the linkage groove, and a guide block that is fixedly connected to the clamping block is slidably fitted to the inner wall of the guide groove.
[0009] According to the above technical solution, a first anti-slip pad is fixedly connected to the adjacent side of the positioning seat and the tightening plate, and a second anti-slip pad is fixedly connected to the adjacent side of the two positioning blocks.
[0010] According to the above technical solution, a return spring is fixedly connected to one of the adjacent sides of the two clamping blocks.
[0011] According to the above technical solution, a rolling groove is provided on one side of each of the two clamping blocks, and a roller is rotatably fitted on the inner wall of each of the two rolling grooves.
[0012] According to the above technical solution, square blocks are fixedly connected to both sides of the tightening block, and the two L-shaped blocks are slidably fitted on the square blocks.
[0013] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: The present invention, by setting up components such as positioning seats, tightening plates, and positioning blocks, and utilizing the left and right clamping cooperation between the positioning seats and the tightening plates, and the front and rear clamping cooperation between the two positioning blocks, forms a four-way synchronous positioning structure, which can limit the small 3D printed model from multiple dimensions, effectively avoiding problems such as slippage and displacement of the model during processing or inspection; at the same time, this structure is compatible with 3D printed models of different shapes such as spheres, cuboids, and cylinders, without the need to change the fixture, which not only improves the adaptability to irregularly shaped models, but also greatly enhances the stability of model fixation. Attached Figure Description
[0014] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the three-dimensional connection structure of the force-bearing blocks of the present invention; Figure 3 This is a schematic diagram of the overall three-dimensional cross-sectional structure of the present invention; Figure 4 This is a partial unfolded three-dimensional structural diagram of the present invention; In the diagram: 1. Base; 2. Positioning seat; 3. Movable groove; 4. Movable lead screw; 5. Moving block; 6. Tightening block; 7. Linkage groove; 8. Movable opening; 9. Force-bearing block; 10. Tightening plate; 11. Trapezoidal groove; 12. Clamping block; 13. Positioning assembly; 131. L-shaped block; 132. Positioning block; 14. Guide groove; 15. Guide block; 16. First anti-slip pad; 17. Second anti-slip pad; 18. Return spring; 19. Rolling groove; 20. Roller; 21. Square block; 22. Drive motor. Detailed Implementation
[0015] 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.
[0016] Please see Figure 1-4The present invention provides a technical solution: a small 3D printed model fixing fixture, including a base 1, a positioning seat 2 fixedly connected to the upper side of the base 1, an movable groove 3 opened on the upper side of the base 1, a movable lead screw 4 rotatably engaged on one side of the inner wall of the movable groove 3, a moving block 5 threadedly engaged on the movable lead screw 4, a tightening block 6 fixedly connected to the upper side of the moving block 5, a linkage groove 7 opened on the upper side of the tightening block 6, an movable opening 8 opened on one side of the inner wall of the linkage groove 7, and a force-bearing block 9 slidably engaged on the inner wall of the movable opening 8; A tightening plate 10 is fixedly connected to one side of the force-bearing block 9, and a trapezoidal groove 11 is provided on the other side of the force-bearing block 9. Two clamping blocks 12 that cooperate with the trapezoidal groove 11 are slidably fitted on the lower side of the inner wall of the linkage groove 7. A positioning component 13 is provided on the opposite side of the clamping block 12. A drive motor 22 that cooperates with the movable lead screw 4 is provided on one side of the base 1.
[0017] Please see Figure 4 The positioning component 13 includes an L-shaped block 131 fixedly connected to the opposite side of the two clamping blocks 12 and a positioning block 132 fixedly connected to the adjacent side of the inner wall of the two L-shaped blocks 131. Both L-shaped blocks 131 extend to one side of the tightening block 6 and slide together. When the clamping blocks 12 slide in the opposite direction, they will simultaneously drive the L-shaped blocks 131 fixed to them to slide along the side of the tightening block 6, thereby driving the positioning blocks 132 on the inner wall of the two L-shaped blocks 131 to move closer to each other and fit against the front and rear sides of the model, so as to achieve clamping and positioning of the model in the front and rear directions.
[0018] Please see Figure 2 and Figure 4 A guide groove 14 is fixedly connected to the lower side of the inner wall of the linkage groove 7. A guide block 15 is slidably fitted to the inner wall of the guide groove 14 and fixedly connected to the clamping block 12. The guide groove 14 provides a sliding track for the guide block 15. Through the fixed connection between the guide block 15 and the clamping block 12, the clamping block 12 is restricted to sliding in a straight line along the direction of the guide groove 14, ensuring that the movement trajectory of the clamping block 12 is accurate and avoiding positioning failure caused by offset.
[0019] Please see Figure 1 and Figure 2 The positioning seat 2 and the tightening plate 10 are both fixedly connected to the adjacent side of the first anti-slip pad 16, and the two positioning blocks 132 are both fixedly connected to the adjacent side of the second anti-slip pad 17. The first anti-slip pad 16 on the positioning seat 2 and the tightening plate 10 and the second anti-slip pad 17 on the positioning block 132 directly contact the model surface when the clamp clamps the model. This increases the friction between the clamp and the model, improves the clamping stability to prevent slippage and deviation, and avoids the rigid parts of the clamp directly contacting and scratching the fine surface of the model.
[0020] Please see Figure 2A return spring 18 is fixedly connected to one side of the two clamping blocks 12. The return spring 18 is connected between the two clamping blocks 12. When the clamp releases the model, the return spring 18 releases elastic potential energy and pushes the two clamping blocks 12 to slide back to their original positions, preparing for the next clamping operation.
[0021] Please see Figure 2 Each of the two clamping blocks 12 has a rolling groove 19 on one side, and a roller 20 is rotatably fitted on the inner wall of each of the two rolling grooves 19. The roller 20 on the clamping block 12 is limited and installed through the rolling groove 19. When the trapezoidal groove 11 of the force block 9 squeezes the clamping block 12, the roller 20 converts the sliding friction between the trapezoidal groove 11 and the clamping block 12 into rolling friction, reducing the contact resistance between the two, making the sliding of the clamping block 12 smoother, and ensuring the synchronicity and sensitivity of the clamping action in the front and rear directions.
[0022] Please see Figure 2 Both sides of the tightening block 6 are fixedly connected to square blocks 21, and two L-shaped blocks 131 are slidably fitted on the square blocks 21. The square blocks 21 on both sides of the tightening block 6 provide sliding support and guidance for the L-shaped blocks 131, restricting the L-shaped blocks 131 to slide only in a straight line along the square blocks 21, ensuring that the L-shaped blocks 131 drive the positioning blocks 132 to move synchronously, thereby achieving precise clamping of the model in the front and rear directions.
[0023] The implementation principle of this application is as follows: A small 3D printed model to be fixed is placed between the positioning seat 2 and the tightening plate 10. The drive motor 22 is started, driving the movable lead screw 4 to rotate. Since the moving block 5 is threadedly engaged with the movable lead screw 4, and the moving block 5 is limited by the movable groove 3, the rotating movable lead screw 4 drives the moving block 5 to slide along the movable groove 3 towards the positioning seat 2. This, in turn, drives the tightening block 6, which is fixedly connected to the moving block 5, to move synchronously, causing the tightening plate 10 to gradually approach the model. When the first anti-slip pad 16 on the tightening plate 10 adheres to the model surface, as the tightening block 6 continues to move, the model generates a similar thrust on the tightening plate 10. This thrust is transmitted to the force-bearing block 9, pushing the force-bearing block 9 along the movable opening 8 towards the linkage groove 7. When sliding inside, the trapezoidal groove 11 on one side of the force block 9 contacts and presses against the rollers 20 on the two clamping blocks 12. The inclined force of the trapezoidal groove 11 forces the two clamping blocks 12 to slide in the same direction along the guide groove 14. At the same time, the clamping blocks 12 press the return spring 18. When the two clamping blocks 12 slide, they drive the L-shaped block 131 fixed to it to move synchronously along the square block 21, thereby pulling the two positioning blocks 132 to move towards each other and gradually fit the front and rear sides of the model. Finally, the positioning seat 2 and the tightening plate 10 clamp the model from the left and right sides, and the two positioning blocks 132 clamp the model from the front and rear sides. The first anti-slip pad 16 and the second anti-slip pad 17 increase the friction between the clamp and the model, preventing the model from slipping or shifting, and achieving multi-directional stable positioning. After the model is processed or inspected, the drive motor 22 is reversed, causing the movable lead screw 4 to rotate in the opposite direction. This causes the moving block 5 to move the tightening block 6 away from the positioning seat 2 and reset. At the same time, the compressed reset spring 18 releases its elastic potential energy, squeezing the two clamping blocks 12 to slide in the opposite direction and reset. The clamping blocks 12 push the trapezoidal groove 11 through the roller 20, causing the force block 9 to move the tightening plate 10 to reset synchronously. The positioning block 132 is removed from the model surface, and the model can be taken out, completing one clamping-releasing operation cycle.
[0024] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.
[0025] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.
Claims
1. A small 3D printed model fixing fixture, comprising a base (1), characterized in that: A positioning seat (2) is fixedly connected to the upper side of the base (1). A movable groove (3) is opened on the upper side of the base (1). A movable screw (4) is rotatably fitted on one side of the inner wall of the movable groove (3). A moving block (5) is threaded on the movable screw (4). A tightening block (6) is fixedly connected to the upper side of the moving block (5). A linkage groove (7) is opened on the upper side of the tightening block (6). A movable opening (8) is opened on one side of the inner wall of the linkage groove (7). A force-bearing block (9) is slidably fitted on the inner wall of the movable opening (8). A tightening plate (10) is fixedly connected to one side of the force-bearing block (9), and a trapezoidal groove (11) is provided on the other side of the force-bearing block (9). Two clamping blocks (12) that cooperate with the trapezoidal groove (11) are slidably fitted on the lower side of the inner wall of the linkage groove (7). A positioning component (13) is provided on the opposite side of the clamping block (12). A drive motor (22) that cooperates with the movable lead screw (4) is provided on one side of the base (1).
2. The small 3D printed model fixing fixture according to claim 1, characterized in that: The positioning component (13) includes an L-shaped block (131) fixedly connected to the opposite side of the two clamping blocks (12) and a positioning block (132) fixedly connected to the inner wall of the two L-shaped blocks (131) on the same side. Both L-shaped blocks (131) extend to one side of the tightening block (6) and slide together.
3. A small 3D printed model fixing fixture according to claim 1, characterized in that: The lower side of the inner wall of the linkage groove (7) is fixedly connected to the guide groove (14), and the inner wall of the guide groove (14) is slidably fitted with the guide block (15) which is fixedly connected to the clamping block (12).
4. A small 3D printed model fixing fixture according to claim 2, characterized in that: The positioning seat (2) and the tightening plate (10) are both fixedly connected to a first anti-slip pad (16) on their adjacent sides, and the two positioning blocks (132) are both fixedly connected to a second anti-slip pad (17) on their adjacent sides.
5. A small 3D printed model fixing fixture according to claim 1, characterized in that: A return spring (18) is fixedly connected to one side of the two clamping blocks (12).
6. A small 3D printed model fixing fixture according to claim 1, characterized in that: Each of the two clamping blocks (12) has a rolling groove (19) on one side, and the inner walls of the two rolling grooves (19) are fitted with rollers (20) for rotation.
7. A small 3D printed model fixing fixture according to claim 2, characterized in that: Both sides of the tightening block (6) are fixedly connected to square blocks (21), and the two L-shaped blocks (131) are slidably fitted on the square blocks (21).