Door Weight Compensator Assembly With Symmetric Deflector Mounting
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Solution Overview
Problem
Existing domestic appliance door-weight compensating devices are complex and costly to manufacture, requiring pre-fitting of components and increasing warehousing costs due to asymmetrical parts, which complicates the assembly process and increases production time.
Innovation Solution
A door-weight compensating device with a deflector having sliding surfaces for the tension transmitting means, pivotally mounted on the base support and secured by a locking element, allowing for simple and fast assembly without rotating the base support, and enabling the deflector to be used as a mirror-symmetrical identical part.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the deflector is pre-fitted to the hinge plate and the hinge plate is fixed to the base support, then the deflector is secured in position, but the assembly process becomes complex and time-consuming requiring rotation of the base support and difficult threading of the tension cable
Solution Approach 1:
The deflector is designed with a pivot bolt that can be inserted through a keyhole-shaped slot in the hinge plate before the hinge plate is fixed to the base support. The pivot bolt with its perpendicular lug is pre-positioned on the deflector, allowing the deflector to be secured in its axial position through the slot without requiring pre-assembly or complex positioning procedures
Solution Approach 2:
Instead of pre-fitting the deflector to the hinge plate and then fixing the hinge plate to the base support (which requires rotation and difficult cable threading), the invention allows the hinge plate to be fixed to the base support first, and then the deflector with its pre-positioned pivot bolt is attached to the hinge plate through the keyhole-shaped slot, eliminating the need to rotate the base support and making cable threading straightforward
2Reliability
If a pivot bolt with a perpendicular lug is used to secure the deflector to the hinge plate, then the deflector is secured in its axial position, but the deflector cannot be used as an identical mirror-symmetrical part for both left and right sides
Solution Approach 1:
The invention uses a keyhole-shaped slot in the hinge plate that is asymmetrically oriented, allowing an identical mirror-symmetrical deflector to be securely mounted on both the left and right sides. The pivot bolt with its perpendicular lug engages with the keyhole-shaped slot in such a way that the asymmetric slot orientation provides the necessary securing function while allowing the deflector itself to remain an identical symmetric part for both sides of the appliance
3Ease of manufacture
If the base support is rotated to insert the tension spring from below into the spring channel, then the spring can be installed, but considerable time and effort are required for the fitter
Solution Approach 1:
The tension spring with the attached tension cable is pre-assembled as a complete unit before installation. This preliminary preparation allows the spring to be directly inserted into the spring channel from the accessible side without requiring rotation of the base support or complex manipulation during the assembly process, significantly reducing the time and effort required by the fitter
4Reliability
If the tension cable is threaded into an already fitted deflector, then the door-weight compensating device is complete, but the process is difficult and relatively time-consuming
Solution Approach 1:
The tension cable is attached to the tension spring in advance before the deflector is installed. This preliminary attachment means that when the deflector is mounted on the hinge plate, the cable is already positioned and ready to be threaded through the deflector's pulley, eliminating the need for difficult and time-consuming cable threading operations after the deflector is fitted
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
This design simplifies the manufacturing and assembly of the door-weight compensating device, reduces production and warehousing costs, and allows for efficient fitting without additional components, enabling faster and more reliable installation.
Implementation Method 1
a door-weight compensating device for at least partially compensating the weight of the container door by spring force of a spring means
Implementation Method 2
connected in a spring force transmitting manner by a tension transmitting means to the container door
Implementation Method 3
the deflector has at least two sliding surfaces for deflecting the tension transmitting means
Data Source
AI summary
An appliance including a treatment container having a container door pivotable about a pivot axis, and a door-weight compensating device for at least partially compensating a weight of the container door. The door-weight compensating device may include a spring which is connected by a tension transmitter in a spring force transmitting manner to the container door. In an exemplary embodiment, the container door includes a deflector pivotally disposed about the pivot axis, the deflector having at least two sliding surfaces for deflecting the tension transmitter.