Introduction of Rack Type Automatic Adjusting Arm？
Release time:
2023-07-21 08:43
Source:
1. The rack-type automatic adjustment arm of this project is connected with a control arm with a control ring on the side of the automatic adjustment arm housing, and an annular gap is set on the control ring, and the annular gap is matched to connect the clutch with a rack; The clutch is sleeved with the worm, one end of the worm is connected with a compression spring, and the other end is against the front end cover.
The control ring controls the clutch and then controls the rotation of the worm. The annular gap on the control ring is in contact with the end of the rack. The length of the annular gap is the gap angle.
When the brake starts, the control arm with the control ring is fixed on the car body, and the automatic adjustment arm housing drives the camshaft connected to the worm gear to rotate through the gap angle and the excess gap angle, the clutch does not drive the worm and records the excess gap angle. When the brake is returned, the clutch drives the worm to rotate in the reverse direction to adjust the camshaft connected to the worm gear to compensate for the excess gap angle to realize the brake gap adjustment.
The entire clutch is controlled by a compression spring. When the brake is at an elastic angle, the clutch does not rotate and adjust, which solves the technical problem of excessive clearance angle adjustment.
2. The clutch includes a bearing, a clutch gear sleeve, a clutch spring, a gear, and a shaft sleeve that are sequentially sleeved on the outer periphery of the worm. The gear is a two-stage annular step structure, which is a one-way gear step and a matching gear step. The gear steps connect the rack.
The inner ring of the clutch gear sleeve is provided with two annular steps. The annular step is a bevel tooth structure that meshes and connects the bevel teeth of the worm close to the outer periphery of one end of the front end cover. The other annular step is a one-way gear step of the one-way inner tooth structure that meshes and connects the gear.
This kind of gear drives the gear to rotate through the rack and then drives the clutch gear sleeve to rotate in one direction, thereby controlling the rotation of the worm. The structure is simple and the failure rate is low. The gear with a two-stage annular step structure prevents radial clearance and causes shaking. Cause excessive gear wear and fatigue damage.
3. The side of the rack is connected with a first return spring and a second return spring. The axial pressing force generated by the first return spring and the second return spring improves the stability of the rack operation, facilitates resetting, and improves Operation safety.
4. One end of the compression spring is connected to the worm through the spring seat, and the other end is connected to the rear end cover. The rear end cover is threaded to the mounting hole of the automatic adjustment arm housing. The mounting hole and the circumferential wall of the rear end cover are provided with a second cylinder Rivet to ensure the stability of the compression force of the compression spring to prevent displacement.
Rack type automatic adjusting arm
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