一种CT模体调节结构
By combining a dual servo motor-driven worm gear transmission system with a pull-out clamping assembly, the problems of multi-angle adjustment and stability of the CT phantom adjustment structure are solved, achieving 360° all-round adjustment and precise positioning, thus improving the calibration efficiency and scanning stability of CT equipment.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANGHAI FULIDA TECH CO LTD
- Filing Date
- 2025-08-12
- Publication Date
- 2026-07-17
AI Technical Summary
The existing CT phantom adjustment structure cannot achieve 360° omnidirectional rotation, resulting in low equipment calibration efficiency and cumbersome operation. Furthermore, the shaking during motor drive affects the stability of scan data.
The system employs a dual servo motor-driven worm gear transmission system, combined with a pull-out clamping assembly and a limit locking mechanism, to achieve independent rotational adjustment of the mold body in the horizontal and vertical directions. The bevel gear transmission ensures smooth power conversion, while the ball bearing support structure and anti-detachment design reduce friction and vibration.
It achieves 360° omnidirectional angle adjustment of the phantom, eliminates the inertial impact of motor start-stop, improves the stability and accuracy of equipment calibration, meets the needs of multi-angle scanning, and enhances the versatility and practicality of the equipment.
Smart Images
Figure CN224505466U_ABST
Abstract
Claims
1. A CT phantom adjustment structure, characterized by, Comprising: A template (2) with a pulling cavity (201) formed inside; Two clamping assemblies (1), symmetrically arranged on both sides of the template (2) and in a pull - type connection with the pulling cavity (201); A frame body (4), fixed at the center of the top of the template (2) and integrally designed with the template (2); A sleeve (6), fixed at the center of the top of the frame body (4); A driving assembly (5), arranged on the frame body (4) below the sleeve (6); A loading mechanism (7), arranged on the top of the sleeve (6), and integrally connected to a sleeve (12) rotatably connected to the sleeve (6) at the center of the bottom; A transmission rod (16), passing through the sleeve (12) and rotatably connected to the sleeve (12), and a first bevel gear (11) is fixed at the top of the transmission rod (16).
2. A CT phantom adjustment structure according to claim 1, characterized in that: The clamping assembly (1) includes an adjusting screw (101), a clamping plate (102), a clamping frame (103) and a pulling plate (104). The shape of the pulling plate (104) matches the internal shape of the pulling cavity (201), and a clamping frame (103) is integrally arranged on the side of the pulling plate (104) away from the template (2). The longitudinal section of the clamping frame (103) is designed in an "冂" shape, and a clamping plate (102) is arranged inside the clamping frame (103). At the central position on the side of the clamping frame (103) away from the pulling plate (104), an adjusting screw (101) is threadedly connected, and the adjusting screw (101) passes through the side wall of the clamping frame (103) and is rotatably connected to the clamping plate (102).
3. A CT phantom adjustment structure according to claim 2, characterized in that: At the central position of the top of the pulling plate (104), a fastening groove (105) is opened along the pulling direction, and limiting plates (8) matching the internal shape of the fastening groove (105) are arranged on both sides inside the pulling cavity (201). On both sides of the top of the template (2), limiting screws (3) are threadedly connected, and the bottom of the limiting screw (3) is rotatably connected to the limiting plate (8). Convex ridges are evenly arranged at the bottom end inside the fastening groove (105), and limiting grooves (801) adapted to the convex ridges are arranged at the bottom of the limiting plate (8).
4. The CT phantom adjustment structure of claim 1, wherein: The driving assembly (5) includes a first worm gear (501), a second worm gear (502), a first worm (503), a second worm (504), a first servo - motor (505), a second servo - motor (506) and a limiting sleeve (507). A second worm gear (502) is rotatably connected at the central position of the top of the template (2), and a first worm gear (501) is rotatably connected to the top of the second worm gear (502). A first worm (503) meshing with it is rotatably connected to the frame body (4) on one side of the first worm gear (501), and a second worm (504) meshing with it is rotatably connected to the frame body (4) on the other side of the second worm gear (502). A first servo - motor (505) with its output end connected to it is fixed to the frame body (4) at one end of the first worm (503), and a second servo - motor (506) with its output end connected to it is fixed to the frame body (4) at the other end of the second worm (504).
5. A CT phantom adjustment structure according to claim 4, characterized in that: The longitudinal section of the frame body (4) is designed in an "L" shape, and on both sides of the two vertical plates of the frame body (4), support plates (401) and fixing frames (402) protrude outwards respectively. Limiting sleeves (507) are fixed on both of the two support plates (401) by bolts, and the end parts of the first worm (503) and the second worm (504) are rotatably connected to the two limiting sleeves (507) respectively. The first servo motor (505) and the second servo motor (506) are connected to the two fixing frames (402) by bolts respectively.
6. The CT phantom adjustment structure of claim 1, wherein: A tray (601) is integrally provided at the top of the sleeve (6), and multiple balls (602) are distributed in a circular array at the top of the tray (601). The inner diameter of the sleeve (6) coincides with the outer diameter of the sleeve (12), and the inner diameter of the sleeve (12) coincides with the outer diameter of the transmission rod (16).
7. The CT phantom adjustment structure of claim 1, wherein: The loading mechanism (7) includes a die body carrier (9), a mounting frame (10), an anti - detachment sleeve (1001), a first bevel gear (11), a fixed seat (13), a second bevel gear (14), a mounting shaft (15) and an anti - detachment ring (17). The mounting frame (10) is arranged at the top of the sleeve (6), and the mounting frame (10) is designed in a "U" shape. A sleeve (12) is fixedly penetrated through the central position of the cross - plate of the mounting frame (10). A mounting shaft (15) is rotatably connected between the two vertical plates of the mounting frame (10). A fixed seat (13) is fixed at the central position of the mounting shaft (15), and a second bevel gear (14) meshing with the first bevel gear (11) is fixed on the mounting shaft (15) on one side of the fixed seat (13). A die body carrier (9) is fixed at the top of the fixed seat (13), and a plurality of long - strip - shaped through - slots (901) are evenly distributed radially on the die body carrier (9). Anti - detachment sleeves (1001) are fixed on both sides of the two vertical plates of the mounting frame (10) far away from the cross - plate. An anti - detachment ring (17) is slidably connected in the anti - detachment sleeve (1001), and both sides of the die body carrier (9) are connected to the top of the anti - detachment ring (17) through connecting plates.
8. A CT phantom adjustment structure according to claim 4, characterized in that: The sleeve (12) penetrates through the sleeve (6) and extends into the first worm gear (501), and the transmission rod (16) penetrates through the sleeve (12) and extends into the second worm gear (502). Three first limiting ribs (5011) are distributed at equal angles on the inner wall of the first worm gear (501), and three second limiting ribs (5021) are distributed at equal angles on the inner wall of the second worm gear (502). First limiting grooves (1201) adapted to the first limiting ribs (5011) are arranged at equal angles at the bottom of the outer wall of the sleeve (12), and second limiting grooves (1601) matching the second limiting ribs (5021) are arranged at equal angles on the outer surface of the bottom of the transmission rod (16).