Vehicle Brake Hydraulic Pressure Control Unit Back-Surface Screw Mounting
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Solution Overview
Problem
Existing vehicle brake hydraulic pressure control units face challenges in miniaturization and assembly efficiency due to increased size and looseness issues caused by large flanges and screws, leading to inefficiencies in assembly and accuracy.
Innovation Solution
A vehicle brake hydraulic pressure control unit design where housing mounting screws are inserted from the back surface, allowing for a smaller control housing and base body size, with individually considered tolerances for the motor and control housing, and motor mounting screws are positioned in point symmetry to stabilize the motor and reduce vertical length, improving assembly efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If flanges are provided on both the motor and control housing to prevent interference of screw heads and mounting tools, then the assembly reliability is improved, but the overall size of the vehicle brake pressure control unit increases
Solution Approach 1:
The patent divides the mounting screw functions into two separate groups: motor mounting screws and housing mounting screws. This segmentation allows each screw type to have its own dedicated mounting path, enabling the housing mounting screws to be inserted from the back surface without requiring large flanges, thus reducing overall size while maintaining assembly reliability
Solution Approach 2:
The patent changes the mounting direction of housing mounting screws from the front surface to the back surface of the base body. This dimensional change in the mounting approach allows screw heads to be positioned away from the front flange area, enabling flange miniaturization while ensuring reliable assembly
2Ease of manufacture
If the inside diameters of through holes are increased to accommodate tolerance variations, then the ease of assembly is improved, but the base body and motor flange are enlarged in size
Solution Approach 1:
By segmenting the mounting screw functions into motor mounting screws and housing mounting screws with separate mounting paths, the patent allows each through hole to be optimized for its specific function. This eliminates the need to enlarge through holes to accommodate combined tolerances, as each mounting path independently handles its own tolerance requirements
3Ease of manufacture
If the inside diameters of through holes are increased to accommodate tolerance variations, then the ease of assembly is improved, but the assembling efficiency deteriorates due to increased positioning time
Solution Approach 1:
The patent segments the assembly process into distinct mounting operations for motor and housing. This segmentation, combined with separate mounting paths, allows for precise positioning without requiring oversized through holes, thereby maintaining high assembling efficiency while ensuring ease of assembly through proper tolerance management
4Ease of manufacture
If the inside diameters of through holes are increased to accommodate tolerance variations, then the ease of assembly is improved, but looseness is generated between constituent members after assembly
Solution Approach 1:
By separating the mounting screw functions into distinct groups with dedicated mounting paths, the patent ensures that each constituent member (motor and housing) is securely fastened without looseness. The segmented approach allows for precise fit without requiring enlarged through holes that would compromise assembly precision
Data Source
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AI summary
A flange 62 having motor mounting through holes 63 is provided on a motor 6, motor mounting holes 19 are provided on a base body 1, so that motor mounting screw 61 are passed through the motor mounting through hole 63 from a back surface 1b side so as to be screwed into the motor mounting holes 19 to fix the motor 6 to the base body 1. Housing mounting holes 83 are provided on a control housing 8, housing mounting through holes 17 are formed on the base body 1 so as to be offset from portions which are in abutment with the flange 62, so that housing mounting screws 81 are passed through the housing mounting through holes 17 from the back surface 1b side so as to be screwed into the housing mounting holes 83 to fix the control housing 8 to the base body 1.