Robot Joint Brake Assembly With Radial Clamping Layout
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Solution Overview
Problem
Conventional brake mechanisms for industrial robots occupy excessive axial space, distribute weight unevenly, and suffer from low collision reliability and service life due to wear and debris generation.
Innovation Solution
A brake assembly featuring a motor rotor, brake disc, friction plate, electromagnet assembly, baffle plate, and spring assembly, where the armature is pushed by the spring to clamp the friction plate and baffle plate for braking, allowing for adjustable friction and compact design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional multi-disc brake mechanism is used, then braking function is achieved, but excessive axial space is occupied and weight distribution becomes uneven
Solution Approach 1:
The patent inverts the conventional brake structure by placing the friction plate on the stationary side rather than the rotating side. The armature and baffle plate clamp the friction plate from both sides, with the friction plate fixed to the brake disc. This inversion allows the moving parts (armature) to be positioned radially outward, reducing axial space occupation while maintaining braking effectiveness.
Solution Approach 2:
The patent transitions the brake mechanism from a primarily axial arrangement to a radial arrangement. The armature is positioned radially outward from the rotor, and the clamping action occurs in the radial direction rather than purely axially. This dimensional change allows the brake to achieve its function with reduced axial footprint, as the electromagnetic switch and other components can be arranged in the radial direction.
2Ease of operation
If electromagnetic switch is mounted along axial direction, then braking control is achieved, but overall axial dimension increases and structure becomes less compact
Solution Approach 1:
The patent relocates the electromagnetic switch from an axial mounting arrangement to a radial mounting arrangement. The electromagnetic switch is positioned radially outward from the rotor, with its actuating member extending radially to engage the armature. This radial arrangement allows the electromagnetic components to be compact in the axial direction, reducing the overall axial dimension while maintaining full braking control functionality.
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 provides adjustable braking, improved reliability, reduced wear, and a more compact design, enhancing the service life and dynamic balance of the brake system while minimizing axial space occupation.
Implementation Method 1
an electromagnet assembly fixed on the bearing; an armature slidably sleeved on the motor rotor... When the electromagnet assembly is de-energized, the armature is pushed by the spring assembly to move in a direction close to the baffle plate
Implementation Method 2
a spring assembly arranged between the armature and the electromagnet assembly. When the electromagnet assembly is de-energized, the armature is pushed by the spring assembly to move in a direction close to the baffle plate
Implementation Method 3
a friction plate fixed to and surrounding the brake disc... the armature is pushed by the spring assembly to move in a direction close to the baffle plate, such that the friction plate is clamped by the armature and the baffle plate to realize braking
Data Source
AI summary
A brake assembly includes: a motor rotor; a brake disc fixed on the motor rotor; a friction plate fixed to and surrounding the brake disc; a bearing rotatably sleeved on the motor rotor; an electromagnet assembly fixed on the bearing; a baffle plate fixed to the electromagnet assembly; an armature slidably sleeved on the motor rotor, and located between the baffle plate and the electromagnet assembly; and a spring assembly provided between the armature and the electromagnet assembly. When the electromagnet assembly is de-energized, the armature is pushed by the spring assembly to move in a direction close to the baffle plate, such that the friction plate is clamped by the armature and the baffle plate to realize braking.