Hospital Bed Auxiliary Drive Layout With Rocker and Sliding Block
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Solution Overview
Problem
Existing auxiliary drivers for movable beds occupy large vertical space due to their vertical arrangement, which is inefficient and cumbersome.
Innovation Solution
An electric auxiliary driving device with a mounting support, rocker, pulling device, lifting device, and balancing device, where the rocker is rotated by a sliding block driven by a driving device, and a spring support rod is used to maintain roller contact with the ground, allowing for compact design and reduced height occupancy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the auxiliary driver is arranged vertically with rollers and electric motor, then the driving function is achieved, but the space occupied in height direction is large
Solution Approach 1:
The patent changes the arrangement dimension of the auxiliary driver from vertical (height direction) to horizontal (length direction). The rocker mechanism is arranged horizontally with the roller extending in the length direction of the bed, allowing the electric motor and transmission components to be positioned along the horizontal axis rather than vertically, thus reducing the height space occupied while maintaining the driving function
Solution Approach 2:
The patent employs a nested arrangement where the electric motor, transmission mechanism, and rocker are integrated in a compact horizontal configuration. The components are arranged in sequence along the horizontal direction, with each component positioned to minimize overall length while maintaining functional connectivity, effectively nesting the driving system within a compact horizontal envelope
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 device enables furniture movement with reduced pressure on the operator while minimizing space usage and maintaining constant contact with the ground, providing a lifting function in a compact form factor.
Implementation Method 1
a balancing device including a spring support rod, wherein a first end of the spring support rod is hinged to the rocker, and a second end of the spring support rod is hinged to the sliding block
Implementation Method 2
The first spindle is provided with an external thread. The sliding block is provided with a first threaded hole. The external thread is connected with the first threaded hole in a threaded manner
Implementation Method 3
The driving device includes a first gear motor and a first spindle. The first gear motor drives the first spindle to rotate
Implementation Method 4
The lifting device further includes a worm wheel and a worm that are capable of rotating relatively and cooperating with each other. The driving motor includes a second gear motor. An output end of the second gear motor is connected with the worm in a driving manner. Teeth of the worm are engaged with external teeth of the worm wheel
Implementation Method 5
The lifting device further includes a first rolling bearing and a second rolling bearing. The worm wheel housing includes a first worm wheel half-housing and a second worm wheel half-housing connected to each other. An inner ring of the first rolling bearing and an inner ring of the second rolling bearing are sleeved on two ends of the worm wheel respectively
Data Source
AI summary
An electric auxiliary driving device and a hospital bed with the electric auxiliary driving device are provided. The electric auxiliary driving device includes: a mounting support fixedly connected with a furniture; a rocker, a first end of the rocker being provided with a rotatable roller, and a second end of the rocker is hinged to the mounting support; a pulling device connected with the rocker, the pulling device being connected with the roller in a driving manner; a lifting device including a driving device and a sliding block moving along a straight line, the driving device driving the rocker to rotate by driving the sliding block to move; and a balancing device including a spring support rod, a first end of the spring support rod being hinged to the rocker, and a second end of the spring support rod is hinged to the sliding block.