Mechanical gripper with adjustable width

Abstract

The invention provides a mechanical gripper with adjustable width and belongs to the technical field of mechanical grippers. The technical problems of high clamping failure rate and poor stability ofexisting gas claws are solved. The mechanical gripper with adjustable width comprises a mounting base, a driving member fixedly connected with the top of the mounting base, a transmission member arranged in the mounting base and connected with the driving member, two grippers symmetrically arranged at the bottom of the mounting base, and two eccentric shafts arranged in the mounting base, whereininner shafts of the eccentric shafts are movably connected with the mounting base; the two grippers extend into the mounting bases and are sleeved with outer shafts of the two eccentric shafts correspondingly; the two grippers are connected with the transmission member in a hinged mode; the two grippers are connected with the mounting base through the eccentric shafts; when the diameters of workpieces held by the gripper change, the width between the two grippers can be adjusted by adjusting the eccentric shafts, so that the gripper can grip the workpieces of different diameters without changing the driving stroke of the driving member, and thus the workpiece gripping accuracy of the whole gripper device is improved.

Description

technical field [0001] The invention belongs to the technical field of mechanical claws, and relates to a mechanical claw with adjustable width. Background technique [0002] Manipulator claws are commonly used mechanical parts in machining equipment at present, especially for the processing of shaft workpieces. Generally, different manipulator claws need to be designed according to different processing techniques and processing requirements. For the processing of shaft workpieces, common manipulators The jaws are two-jaw pneumatic grippers. [0003] For example, the invention patent application with the application number of 201711443883.3 discloses a pneumatic gripper, including a clamping seat, a cylinder and two claws are installed on the clamping seat, the cylinder is fixedly connected with the clamping seat, and the two claws are connected with the clamping seat. Hinged connection, the cylinder and the two claws are hingedly connected, driven by the cylinder, the two ...

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Problems solved by technology

[0003] For example, the invention patent application with the application number of 201711443883.3 discloses a pneumatic gripper, including a clamping seat, a cylinder and two claws are installed on the clamping seat, the cylinder is fixedly connected with the clamping seat, and the two claws are connected with the clamping seat. Hinged connection, the cylinder and the two claws are hingedly connected, driven by the cylinder, the two claws can swing synchronously at the hinge point, so as to realize the grasping and releasing of the workpiece, which is convenient to use, but there are the following technical problems at the same time, 1. The existing The air cylinder realizes its signal feedback by the sensor induction between the piston rod and the cylinder body, and when the pneumatic gripper clamps shaft workpieces with different diameters, the movement stroke of the piston rod of the cylinder is different. When the clamped workpiece When the diameter changes greatly, the piston rod of the cylinder will not be able to sense the sensor, and the control system will not be able to receive the sensor signal, and the next step will not work, resulting in a high error rate of the pneumatic gripper, stagnation of processing, and low processing efficiency; 2 , The cylinder cannot provide information feedback to the control system, and cannot perform the next action. At this time, the clamping of the workpiece by the cylinder is also unstable, which can easily cause the workpiece to break away from the air claw, resulting in damage to the workpiece

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