Rotation angle measuring device and engineering machinery

Abstract

The invention discloses a rotation angle measuring device and engineering machinery. The rotation angle measuring device comprises a substrate, a connection shaft, an elastic connection piece, a rotary encoder, a transmission shaft and an inner gear ring, wherein the rotary encoder is arranged on the substrate, and an input shaft of the rotary encoder is connected with the transmission shaft; the lower part of the transmission shaft is fixedly provided with an outer gear, and the outer gear is engaged with the inner gear ring on a chassis; the connection shaft is fixedly arranged on an upper car body, and the substrate is connected to the connection shaft in a swinging way; and a first end of the elastic connection piece is connected to the substrate, a second end is connected to the upper car body, and the substrate and the transmission shaft are pulled towards the outer part of the inner gear ring, so that the outer gear on the bottom of the transmission shaft is maintained engaged with the inner gear ring. Due to the adoption of the rotation angle measuring device, while the rotation angle of the upper car body is precisely measured, the flexibility in connection of the encoder and the chassis is realized, parts of the rotation angle measuring device can be prevented from suffering large radial force, and the connection piece between the rotary encoder and the upper car body can be effectively prevented from being cut off.

Description

technical field [0001] The invention relates to the field of construction machinery, in particular to a rotation angle measuring device and construction machinery provided with the rotation angle measurement device. Background technique [0002] At present, many construction machinery such as excavators, rotary drilling rigs, roadheaders, etc. include an upper body and a chassis. The upper body is rotatably connected to the chassis through a slewing bearing, and the upper body is driven to rotate to a suitable work location. Usually, this kind of engineering machinery needs the upper body to rotate reciprocally to work, and also needs to monitor the relative rotation angle between the upper body and the chassis. The rock and soil are lifted to the outside of the hole to unload the soil, and the same hole is drilled through periodic circulation operations. At this time, it is necessary to accurately measure the rotation angle of the upper body. [0003] In order to facilita...

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Problems solved by technology

[0004] However, the working device in the existing rotary angle measuring device, that is, the connection between the rotary encoder and the upper vehicle body is fixed by bolts, and at the same time, the input shaft of the encoder is fixedly connected with the transmission shaft of the chassis through a coupling, and the upper vehicle body rotates When working, the bolts fixedly connecting the rotary encoder and the upper body will be subject to a large radial force, and are often cut off, resulting in failure of the measurement work and even damage to the encoder

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