Food Slicer Hold-Down Drive Layout for Precise Compact Feeding
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Solution Overview
Problem
Existing food slicing machines with product hold-down devices have drive units that are technically complex, space-consuming, and face issues with mechanical bearing and force transmission.
Innovation Solution
A drive unit arrangement where the motor and drive shaft are positioned on the same side of the gearbox housing, allowing for a redirect of rotation by 150° to 210°, with a gearbox that has a gear ratio of 1 to 16, and a torque support that is more elastic in the axial direction than radial, using a servo motor and ball bearings, enclosed in a housing for protection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the motor and drive shaft are arranged laterally outside the extent of the drive shaft (conventional arrangement), then the power transmission can be achieved, but the device takes up a relatively large amount of space and is technically complex
Solution Approach 1:
The motor and drive shaft are merged into a compact arrangement on the same side of the gearbox housing, eliminating the need for lateral extension and reducing overall device volume while simplifying the mechanical layout
Solution Approach 2:
The rotation direction is redirected by 150° to 210° through the gearbox arrangement, allowing the drive components to be positioned in a compact configuration on the same side rather than requiring lateral extension, effectively utilizing spatial reorientation to reduce volume
2Measurement precision
If a gearbox with high gear ratio (i=1 to i=16) is used to reduce input speed, then the output speed is reduced to slower speed for precise feeding, but the bearing torques increase
Solution Approach 1:
The torque arm is designed with asymmetric elasticity characteristics - more elastic in the axial direction than in the radial direction - to specifically counteract the bearing torques generated by the gearbox, allowing high gear ratios for precision while managing the resulting forces
Solution Approach 2:
The elasticity parameters of the torque arm are optimized to provide appropriate compliance in the axial direction to absorb bearing torques, while maintaining rigidity in the radial direction for stable motor and gearbox mounting
3Stability of the object's composition
If the torque arm is made rigid to securely mount motor and gearbox, then stable mounting is achieved, but the gearbox housing cannot accommodate tilting relative to the drive shaft direction
Solution Approach 1:
The torque arm exhibits different mechanical properties in different directions: rigid in the radial direction for stable mounting, and elastic in the axial direction to accommodate tilting of the gearbox housing, providing localized compliance where needed
4Reliability
If the gearbox housing is made watertight to protect against water ingress, then protection is improved, but the manufacturing complexity and sealing requirements increase
Solution Approach 1:
A waterproof membrane or flexible sealing layer is integrated into the gearbox housing design, providing effective water protection while allowing for simpler manufacturing compared to fully sealed rigid constructions
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 configuration achieves space-saving, stable, and precise product feeding with reduced bearing torques, enabling precise cutting quality and easy assembly, while accommodating various machine types with standardized production.
Implementation Method 1
The gearbox shafts can be supported by ball bearings, particularly deep groove ball bearings
Implementation Method 2
the torque support is more elastic in the axial direction than radial, using a servo motor and ball bearings
Data Source
Figure 1~2e
Figure 3~4
Figure 5~6
AI summary
The invention relates to a drive unit (1) for a product hold-down element (51) of a food cutting machine (73) for driving a transport means (55) of a product hold-down element (51). The drive unit (1) comprises a driveshaft (3), a gearbox (5) having a gear housing (7) with a first and a second side (13, 15), a motor (9), and a torque support (11). The drive shaft (3) is connected to the gearbox (5) and is designed to drive a transport means (55). The motor (9) is connected to the gearbox (5) so that a rotation of the motor (9) is transmitted to the drive shaft (3) by means of the gearbox (5). The drive shaft (3) and the motor (9) are connected to the gearbox (5) on the first side (13) of the gearbox housing (7). The gearbox housing (7) is mounted on the torque support (11) on the second side (15).