Double-Hook Dough Kneading Structure for Mixer Vibration Reduction
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Solution Overview
Problem
Existing dough mixers with single dough kneading hooks suffer from low efficiency, excessive vibration, and difficulty in changing autorotation speeds, leading to gear faults due to complex gear components.
Innovation Solution
A double-hook dough kneading structure that omits the sun gear, using an output shaft to directly drive a rotating rod with two planetary gears engaged with an internally-toothed ring, allowing adjustable autorotation speeds and reducing accessory costs, featuring detachable dough kneading hooks with single-spiral mixing portions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a single dough kneading hook is used, then the structure is simple, but the dough kneading efficiency is low and the mixing effect is not ideal
Solution Approach 1:
The single dough kneading hook is segmented into two separate hooks (first and second dough kneading hooks), each capable of independent rotation. This segmentation allows simultaneous kneading action at multiple points in the mixing pot, significantly improving dough kneading efficiency while maintaining relatively simple overall structure
Solution Approach 2:
Two dough kneading hooks are merged into a single integrated system sharing a common drive mechanism (planetary gear). The hooks work together in the mixing pot, combining their kneading actions to achieve superior mixing effect while avoiding the need for completely separate drive systems
2Object-affected harmful factors
If a single dough kneading hook is used, then the device is simple, but the mixer experiences great vibration and shaking amplitude
Solution Approach 1:
The second dough kneading hook acts as a counterbalance to the first hook. When both hooks rotate in opposite directions or at different phases, their centrifugal forces and unbalanced loads counterbalance each other, significantly reducing vibration amplitude and shaking of the mixer body
Solution Approach 2:
The two dough kneading hooks are designed with different sizes (first hook larger than second hook) and may rotate at different speeds, creating asymmetric kneading patterns. This asymmetry prevents synchronized vibration patterns while ensuring thorough mixing coverage
3Adaptability or versatility
If traditional planetary gears with sun gear are used, then the structure is complete, but the autorotation speeds cannot be easily changed and gear faults occur frequently
Solution Approach 1:
The sun gear component is extracted (removed) from the traditional planetary gear system. This simplifies the gear structure by eliminating the central sun gear while maintaining the planetary gear functionality through direct engagement between planetary gears and the internally-toothed ring, enabling easier speed adjustment
Solution Approach 2:
The system is designed with adjustable parameters where the tooth numbers of planetary gears can be modified to change autorotation speeds. This dynamic adjustability allows the system to adapt to different dough types and kneading requirements without requiring complete gear replacement
Data Source
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AI summary
The present invention relates to the technical field of dough mixers, in particular to a double-hook dough kneading structure and a dough mixer. The double-hook dough kneading structure includes an output shaft 1, a rotating rod 2 with a center perpendicularly fixed to a bottom of the output shaft, a first rotating shaft 3 rotationally connected to one end of the rotating rod, a second rotating shaft 4 rotationally connected to the other end of the rotating rod, a first dough kneading hook 5 detachably connected to a bottom of the first rotating shaft, a second dough kneading hook 6 detachably connected to a bottom of the second rotating shaft, an internally-toothed ring 7 fixed to an outer side of the output shaft, a first planetary gear 81 fixed to a top of the first rotating shaft, and a second planetary gear 82 fixed to a top of the second rotating shaft, where the first planetary gear and the second planetary gear are respectively engaged with an inner side of the internally-toothed ring. According to the double-hook dough kneading structure in the present invention, the output shaft is used to directly drive the rotating rod to rotate, so that a sun gear at the center is omitted, and the accessory cost is reduced. In addition, the autorotation speeds of the two dough kneading hooks can be changed by adjusting the tooth numbers of the two planetary gears, the mixing effect is better, the structure is simple, and the double-hook dough kneading structure is convenient to use.