High-precision brake mechanism

Abstract

The invention relates to a high-precision brake mechanism which comprises a brake switch, a brake disc, a switch connecting frame, a rotating shaft and a drive device; the drive device is connected with the input end of the rotating shaft. The high-precision brake mechanism is characterized in that the brake disc is mounted on a shaft shoulder of the rotating shaft and performs rotary motion along the rotating shaft; the brake switch comprises an electromagnetic switch, a reset spring and an iron core and is mounted on the switch connecting frame; the iron core is inserted in a columnar through hole in the electromagnetic switch, and the connection between the electromagnetic switch and the iron core is completed by the reset spring; the brake disc comprises a fixed base and six disc teeth with the same structure; the six disc teeth are uniformly distributed on the cylindrical side surface of the fixed base by taking the fixed base as a center, each of the disc teeth is from the connecting end of the fixed base to the tail end of the disc tooth, and the width of each of the disc teeth gradually reduces; V-shaped grooves are symmetrically formed in the two sides at the tail end of each of the disc teeth; the fixed base is in the shape of a cylinder with a cover-sealed bottom end.

Description

technical field [0001] The invention relates to the technical field of transmission control, in particular to a high-precision braking mechanism. Background technique [0002] The brakes or braking systems currently in use basically adopt the structure of electromagnets and springs, and the brake disc is in the shape of a ring, which is mainly braked by friction braking. The motion system is powered on, and the electromagnetic brake coil is activated. Electricity, magnetic force is generated, the armature pulls in, overcomes the tension of the spring to separate the stator of the brake from the rotor, and the rotating shaft operates normally; the motion system is powered off, and the electromagnetic brake coil is also powered off, and the armature is separated from the electromagnet under the action of spring tension , and make the rotor of the brake tightly press the stator, and the rotating shaft is braked due to the friction between the stator and the rotor to stop, so as...

AI Technical Summary

Problems solved by technology

[0003] The above-mentioned brake requires a larger coil to generate sufficient magnetic force, and requires a relatively large elastic force of the spring, and the structure is complicated; Larger heat has higher requirements for heat dissipation. If it is applied to a high-speed rotating mechanism, how to solve the problem of heat dissipation is a difficult problem; because the above-mentioned brake uses the principle of friction braking, the braking torque is relatively small under a certain volume limit; the above-mentioned The structure of the brake has complex structure, heavy weight, large volume, low interchangeability, high cost, and difficulty in heat dissipation

Traditional excitation brakes, such as Miki Pulley’s excitation brakes, separate models, need to ensure a fixed gap between the stator and the rotor during installation. This gap is generally 0.2-0.5mm. Because it is very small, it is difficult to ensure its Accuracy, and this accuracy needs to be guaranteed by the customer. The seller is not responsible for the assembly. During the movement, a slightly larger axial movement may interfere with this gap, making the stator and the rotor come into contact, and the installation is inconvenient.

For the one-piece brake, although there is no need to guarantee the clearance, it is expensive, about 500 yuan, and the cost is relatively high, and the structure is complicated. Since it is one-piece, if there is a problem during use, it is difficult to pass. Replacement of damaged parts to achieve the purpose of maintenance, more is the need to replace a new brake

[0004] In addition, the Chinese patent application number 2015108280611 discloses a brake device, which uses an electromagnetic switch to block the turntable to achieve braking, but the connection between the brake disk and the shaft is a jackscrew connection, and the installation is not reliable; and the teeth of the disk are strips In the braking process, it is easy to slip radially with the electromagnet, resulting in braking failure; there is no harmonic reducer and other similar large reduction ratio reduction mechanisms in the components of the braking mechanism, and its braking accuracy It is not high, and the required braking torque is relatively large; the electromagnetic switch is connected to the stator through an iron sheet, which is low in strength, unstable, and easily damaged; the axial distance occupied by the electromagnetic switch is relatively large, and the electromagnetic switch needs to be reserved for its electromagnet. The distance of the limit height position that can be reached, the space utilization rate is low

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