Motor-driven station slewing mechanism combined with wedge-shaped positioning

Abstract

The invention discloses a motor-driven station slewing mechanism combined with wedge-shaped positioning. The station slewing mechanism comprises a rack and a mounting plate arranged at the top of the rack; a rotary output mechanism is arranged on the mounting plate and comprises a rotary output shaft and a driven wheel; the rotary output shaft is vertically arranged on the mounting plate through a bidirectional supporting bearing, and one part of the rotary output shaft extends above the mounting plate for mounting a tool mounting base plate; the driven wheel is pivoted with the lower end of the rotary output shaft through a rolling bearing; an elastic rotation driving mechanism is arranged on the lower end faces of the driven wheel and the rotation output shaft, and the driven wheel drives the rotation output shaft to rotate through the elastic rotation driving mechanism; a wedge-shaped positioning mechanism is arranged on the mounting plate and the tool mounting base plate and used for carrying out station positioning on the tool mounting base plate; and a power input mechanism is arranged on the mounting plate and is used for driving the driven wheel to rotate. The station slewing mechanism has the characteristics of low cost, accurate and controllable positioning, elastic driving rotation and the like.

Description

technical field [0001] The invention relates to a rotary mechanism of a station driven by a motor combined with wedge-shaped positioning. Background technique [0002] The station reciprocating rotary mechanism in the prior art (taking two stations as an example) mainly has the following driving modes: driven by a cam dividing mechanism; driven by a motor directly connected to a rotary shaft; ) drive; hydraulic actuator (linear cylinder rack and pinion or swing rotary cylinder) drive; [0003] The station reciprocating and rotating mechanism of the prior art has the following defects: [0004] Disadvantages of the drive of the cam split mechanism: under the same support load, it takes up a large radial space. In order to ensure the turning space of the tooling at the bottom of the turntable, the diameter of the turntable must be increased, resulting in three defects. First, the moment of inertia is large, and the impact of starting and stopping is large. Running stability ...

AI Technical Summary

Problems solved by technology

[0004] Disadvantages of the drive of the cam split mechanism: under the same support load, it takes up a large radial space. In order to ensure the turning space of the tooling at the bottom of the turntable, the diameter of the turntable must be increased, resulting in three defects. First, the moment of inertia is large, and the impact of starting and stopping is large. poor running stability

Second, the organization occupies a large space, which is not conducive to the arrangement of other institutions

Third, it leads to an increase in manufacturing costs

[0005] Disadvantages of the motor directly connected to the rotary shaft drive: under the same supporting load, due to the rigid direct connection between the motor and the rotary shaft, there are three defects. First, the positioning accuracy is low, and the overall mechanism is greatly impacted during the start-stop phase

Second, the operation process lacks effective safety protection devices

Third, the use and maintenance costs are high

[0006] Disadvantages of pneumatic actuator drive; ordinary pneumatic actuator drive is limited by the driving principle, and has three defects during operation: First, it is affected by the fluctuation of air source pressure, resulting in obvious fluctuations in operating speed (linear velocity or angular velocity), especially at startup / Big impact at stop stage

The second is that when the load changes (lubrication, temperature, etc.), the running speed (linear speed or angular speed) will fluctuate significantly, and the ideal running speed cannot be obtained throughout the running process.

Third, the operation process lacks effective safety protection

[0007] Disadvantages of hydraulic actuator drive; although the hydraulic actuator drive has the same advantages as the new mechanism with small space and stable operation, it has the following three defects compared with the new mechanism: First, the cost of the hydraulic system (including manufacturing and maintenance costs) is high, which is easy to cause environmental pollution

Second, the hydraulic pipeline takes up a lot of space

Third, the lack of effective security protection

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