A brake structure of a bidirectional piston

By using a bidirectional piston brake structure and annular step and groove array design, the problem of insufficient braking force of the five-axis turntable under heavy load and high torque conditions is solved, achieving efficient and reliable braking effect and structural stability.

CN224283300UActive Publication Date: 2026-05-26SUZHOU DAWEI MULTI AXIS INTELLIGENT TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
SUZHOU DAWEI MULTI AXIS INTELLIGENT TECH CO LTD
Filing Date
2025-08-28
Publication Date
2026-05-26

AI Technical Summary

Technical Problem

Under heavy load and high torque conditions, the existing braking technology of the cradle-type rotary table of the existing five-axis linkage CNC machining center is difficult to provide sufficient braking force in the compact space. At the same time, there is a risk of failure of the release action, which affects the safety of equipment and personnel.

Method used

It adopts a two-way piston brake structure, which forms two-way static friction braking through the piston and the annular step. Combined with a unique groove array design to guide and remove wear debris and enhance heat dissipation, it achieves precise brake regulation through an independently controlled dual-chamber pressure design.

Benefits of technology

It significantly improves braking force and response speed, maintains a high coefficient of friction, reduces thermal fade, ensures braking reliability and structural durability, and provides precise braking control.

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Abstract

This invention proposes a bidirectional piston brake structure, including a cylinder body shell sleeved outside a rotating shaft, brake pads fixedly connected to the rotating shaft, a cylinder head plate with a closed groove, and a piston disposed in the groove, dividing the chamber into a first chamber and a second chamber. The end face of the cylinder head plate facing the brake pad has an annular step, which forms an annular pressure surface opposite to the brake pad, and an axial gap is reserved between the annular pressure surface and the brake pad. This brake structure forms a powerful bidirectional static friction braking through the piston pressure and the reaction force of the annular step, significantly improving braking force and response speed. The unique groove array design on the step pressure surface can effectively guide and remove wear debris, prevent the formation of a lubricating layer to maintain a high coefficient of friction, and enhance heat dissipation to reduce thermal fade. The stress dispersion rounded corners of the contact area improve the structural durability.
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