PTZ Camera Cantilever Structure for Gear Backlash Damping
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Solution Overview
Problem
PTZ cameras suffer from backlash between the gear shaft and output gear, leading to image jitter during reciprocating rotation, which affects image-shooting quality.
Innovation Solution
A cantilever mechanical structure with a gear shaft, torsion spring, and fastening member is introduced, where the torsion spring is mounted in an accommodating groove of the gear shaft to compensate for backlash and provide damping, ensuring stable image-shooting quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a gear shaft and output gear are used to implement relative rotation between camera housing and pan-tilt housing, then the camera can achieve rotation functionality, but backlash between the gear shaft and output gear causes image jitter and affects image-shooting quality
Solution Approach 1:
A torsion spring is introduced as an intermediary component between the gear shaft and the output gear. The torsion spring absorbs and compensates for the backlash in the gear mesh, providing continuous torque transmission and eliminating the gaps that cause image jitter during reciprocating rotation.
Solution Approach 2:
The torsion spring changes the mechanical parameter of torque transmission by introducing elastic deformation. Instead of rigid direct connection, the system uses elastic compliance to maintain continuous contact and eliminate backlash, transforming the rigid mechanical linkage into a compliant one that compensates for manufacturing tolerances.
2Manufacturing precision
If a torsion spring is added to compensate for backlash, then image-shooting quality is improved, but the device complexity increases
Solution Approach 1:
The torsion spring is designed as a thin, flexible elastic component that can be easily integrated into the existing gear mechanism. Its flexible nature allows it to accommodate the backlash compensation function without requiring complex mechanical linkages or additional actuation systems.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The torsion spring compensates for backlash between the gear shaft and output gear, preventing image jitter and enhancing image-shooting quality by providing a controlled torque and damping force during camera rotation.
Implementation Method 1
a torsion spring, and a fastening member that is fixedly mounted inside a pan-tilt housing... the torsion spring is mounted in the accommodating groove... to compensate for backlash between a gear shaft and an output gear of a motor
Implementation Method 2
the gear shaft is provided with a side opening communicating with the accommodating groove... the torsion spring is mounted in the accommodating groove... an engagement end portion that is of the torsion spring and that is close to a top of the accommodating groove extends out of the accommodating groove and is connected to the fastening member
Implementation Method 3
the torsion spring is mounted in the accommodating groove... to compensate for backlash between a gear shaft and an output gear of a motor, and ensure image-shooting quality of the PTZ camera... providing a controlled torque and damping force during camera rotation
Data Source
AI summary
A cantilever includes a gear shaft, a torsion spring, and a fastening member that is fixedly mounted inside a pan-tilt housing. The gear shaft rotationally fits the fastening member, a shaft shoulder of the gear shaft is recessed in a direction parallel to an axial direction of the shaft shoulder to form an annular accommodating groove, and the gear shaft is provided with a side opening communicating with the accommodating groove. The torsion spring is mounted in the accommodating groove, a limiting end portion that is of the torsion spring and that is close to a bottom of the accommodating groove extends out of the side opening, the side opening is configured to limit a position of the limiting end portion relative to the gear shaft, and an engagement end portion extends out of the accommodating groove and is connected to the fastening member gear shaft.