Dispensing device with improved motor assembly
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Solution Overview
Problem
Conventional dispensers for viscous liquids suffer from friction and vibration during operation, leading to wear and breakage, as well as generating offensive noise.
Innovation Solution
The dispenser incorporates an improved motor assembly with elastomeric members and a cam shaft design that reduces friction and vibration transfer, featuring a rocker arm and cam shaft configuration to minimize eccentric loads, along with elastomeric members and gaskets to enhance stability and quiet operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional motors and motor housing are used in dispensers, then the dispenser can dispense product, but friction and vibration during motor operation cause wear and breakage
Solution Approach 1:
The patent introduces elastomeric members as intermediary elements between the motor and motor housing, and between the cam shaft and rocker arm. These elastomeric intermediaries absorb friction and vibration, preventing direct transmission to rigid components. This resolves the contradiction by maintaining motor functionality while protecting against wear and breakage through cushioning intermediaries.
Solution Approach 2:
The patent applies elastomeric cushioning members in advance at critical interfaces (motor-housing interface, cam shaft-rocker arm interface) to prevent wear and breakage before they occur. This beforehand cushioning approach addresses the reliability issue by pre-positioning protective elements that will absorb future friction and vibration during motor operation.
2Productivity
If conventional motors and motor housing are used in dispensers, then the dispenser can dispense product, but friction and vibration generate offensive noise
Solution Approach 1:
The elastomeric members serve as noise-absorbing intermediaries between the motor and motor housing, and between moving components. These intermediaries dampen vibration and reduce noise generation while allowing the motor to continue dispensing product effectively. This resolves the contradiction by maintaining productivity while eliminating offensive noise through vibration isolation.
3Reliability
If the cam shaft is not properly supported, then the motor assembly is simpler, but eccentric motion causes wear on the cam shaft
Solution Approach 1:
The patent introduces elastomeric members as intermediaries at the cam shaft support points, providing cushioning and wear protection. This adds minimal structural elements (the elastomeric members) while significantly improving cam shaft durability by absorbing eccentric motion forces and reducing direct metal-to-metal contact.
Solution Approach 2:
The patent changes the material parameter at critical contact points by using elastomeric members instead of rigid supports. This material parameter change allows the support structure to deform elastically, accommodating eccentric motion and reducing wear on the cam shaft while adding minimal complexity to the overall assembly.
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 solution effectively reduces friction and vibration, minimizing wear and noise, ensuring a quieter and more reliable operation of the dispenser.
Implementation Method 1
The first elastomeric member can, advantageously, reduce vibration transfer between the motor and the motor holder during operation of the motor
Implementation Method 2
A first elastomeric member is disposed between the motor and the motor holder
Implementation Method 3
The first elastomeric member can, advantageously, reduce vibration transfer between the motor and the motor holder during operation of the motor
Data Source
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AI summary
A dispenser for viscous liquid is provided. The dispenser includes a housing having an interior volume so as to retain at least one internal liquid reservoir; and a dispensing mechanism contained within the housing for dispensing the viscous liquid. The dispensing mechanism comprising a motor assembly including: a motor having a motor shaft coupled to a motor holder; a first elastomeric member disposed between the motor and the motor holder; a cam having a cam shaft disposed on the motor shaft, the cam shaft having a first end coupled to the cam and a second end coupled to the motor housing; and a rocker arm coupled to the motor housing. The rocker arm has a slot configured to receive the cam shaft and a first end coupled to the internal liquid reservoir such that actuation of the cam shaft moves the rocker arm to dispense the viscous liquid.