Boat-Shaped Rocker Arm for 3D Accelerator Rotation
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Solution Overview
Problem
Current radiotherapy equipment can only irradiate a 360° planar space, failing to effectively target three-dimensional lesions due to high torque requirements and stability issues with traditional rotating shaft suspensions.
Innovation Solution
A novel accelerator therapy device featuring a boat-shaped rocker arm that allows the accelerator to rotate on a spherical surface, eliminating the need for a rotating shaft and reducing torque requirements, with a driving device comprising supporting rollers and a balancing weight assembly for enhanced stability and reduced manufacturing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a rotating shaft suspension system is used to enable three-dimensional rotation of the main frame, then the accelerator can irradiate lesions in any direction of three-dimensional space, but the torque borne by the rotating shaft becomes very large and the driving device requirements become very high
Solution Approach 1:
The patent introduces a spherical coordinate system and uses spherical rotation mechanisms instead of traditional planar rotation. The accelerator is mounted on a spherical surface and can rotate around a spherical center (isocenter), enabling three-dimensional irradiation coverage. This curved geometric approach distributes mechanical loads more effectively compared to flat planar rotation, reducing the torque concentration on single rotating shafts while maintaining full angular accessibility for lesion irradiation from any direction in 3D space.
2Adaptability or versatility
If the main frame and accelerator are suspended on two struts via a rotating shaft, then three-dimensional rotation is enabled, but the system becomes complex and stability is compromised
Solution Approach 1:
The patent extracts and eliminates the complex rotating shaft suspension system from the traditional design. Instead of using two struts connected via a rotating shaft to suspend the main frame, the invention directly mounts the accelerator on a spherical rotation mechanism that rotates around a fixed spherical center. This extraction removes the intermediate suspension components (struts and rotating shafts), simplifying the overall structure while preserving the essential three-dimensional rotation capability around the isocenter.
Solution Approach 2:
The patent inverts the traditional suspension approach by fixing the rotation center (isocenter) and mounting the accelerator to rotate around it, rather than suspending the entire main frame on moving struts. This inversion transforms the system from a suspended oscillating structure to a fixed-center rotational system, greatly improving stability and reducing structural complexity while achieving the same therapeutic effect of multi-directional irradiation.
3Ease of operation
If a traditional rotating shaft system is used, then planar 360° rotation is achieved, but three-dimensional spherical space irradiation cannot be realized
Solution Approach 1:
The patent transitions from two-dimensional planar rotation to three-dimensional spherical rotation. The accelerator is mounted on a spherical surface and can rotate around a spherical center, adding a vertical dimension to the traditional horizontal 360° rotation. This dimensional expansion allows the radiation beam to access lesions from any direction in three-dimensional space, including superior-inferior, anterior-posterior, and lateral directions, thereby achieving complete spherical coverage while maintaining operational control through spherical coordinate system management.
Data Source
AI summary
The invention discloses a base for a novel accelerator therapy device. A boat-shaped rocker arm is creatively utilized to drive a main frame to rotate around an X axis, and meanwhile an accelerator simultaneously follows the main frame to rotate around a Z axis, so that the accelerator runs on a spherical surface and irradiates an isocentric lesion in any direction of a three-dimensional spherical space; the center of gravity of the boat-shaped rocker arm is low, the boat-shaped rocker arm bears weight on the curved surface, and a rotating shaft and an upright post for bearing the weight of the main frame and the weight of the accelerator in the prior art are removed, so that the base is high in stability, safe, reliable and low in requirement for transmission equipment and easily realizes industrialized application.