CN-224211877-U - Rotary displacement mechanism

Abstract

The application discloses a rotary displacement mechanism which comprises a base, a driving unit, a compound motion assembly and an end execution unit. The base is provided with a linear guide rail and a composite guide groove which extend along a first axial direction, the composite guide groove is formed by continuously connecting a linear guide section, an arc-shaped transition section and an angle correction section, the linear guide section and the linear guide rail are arranged in parallel, and the angle correction section and the linear guide section form a 90-degree space included angle. Through the collaborative design of the composite motion track constraint mechanism and the single driving source, the number of parts required by the traditional multi-axis mechanism is greatly reduced, the manufacturing cost of equipment is obviously reduced, a complex electrical control system is not needed, and the compactness and the economical efficiency of the whole structure are obviously improved.

Inventors

• CHEN RONG
• LI CHUNCHENG
• LI KUNYUAN

Assignees

• 祥鑫科技股份有限公司

Dates

Publication Date

20260508

Application Date

20250211

Claims (2)

1. 1. The rotary displacement mechanism is characterized by comprising a base, a driving unit, a compound motion assembly and an end execution unit; The base is provided with a linear guide rail and a composite guide groove which extend along a first axial direction, the composite guide groove is formed by continuously connecting a linear guide section, an arc-shaped transition section and an angle correction section, the linear guide section and the linear guide rail are arranged in parallel, and the angle correction section and the linear guide section form a 90-degree space included angle; The composite motion assembly comprises a motion sliding block and a linkage adapter, wherein the motion sliding block is provided with a guide part which forms a sliding pair with a linear guide rail, the lower part of the linkage adapter is provided with a shaft rod which is connected with the motion sliding block through a connecting plate, and the shaft rod is matched with the motion sliding block; The driving unit adopts a pneumatic telescopic rod, a cylinder body of the driving unit is fixedly connected with the base, and the end part of a piston rod is in transmission connection with the moving slide block through a hinge mechanism and is used for driving the moving slide block to do reciprocating linear motion along the linear guide rail; The tail end executing unit is fixedly arranged at the top of the linkage adaptor through the bearing bracket, and the space position of the tail end executing unit is controlled by the composite motion trail of the linkage adaptor.
2. 2. A rotary displacement mechanism as claimed in claim 1, wherein the walls of the connecting plates are inlaid with a layer of copper graphite.

Description

Rotary displacement mechanism Technical Field The application belongs to the technical field of mechanical transmission and automatic equipment, and particularly relates to a composite motion mechanism for workpiece posture adjustment and space position conversion on an industrial production line, which is particularly suitable for material handling and tool positioning scenes needing to synchronously realize linear displacement and angle deflection. Background In the field of industrial production automation, a rotary displacement mechanism is used as a core component of a material conveying system and bears the key tasks of workpiece posture adjustment and station transfer. Currently, the mainstream solution generally adopts a two-axis linkage mechanical arm structure, and space coordinate transformation is realized through cooperative motion of a horizontal rotating shaft and a vertical lifting shaft. The mechanism has the advantages of strong flexibility and wide application scene in the aspect of motion trail planning, but the mechanical structure of the mechanism needs to be provided with an independently driven double-shaft system, so that the transmission chain length is increased by about 40%, the number of parts is up to more than 200, the processing and assembling cost is remarkably increased, and the overall weight of the equipment is increased by more than 30%. Particularly when processing metal workpieces with a mass of more than 50kg, in order to ensure that the positioning accuracy of the end effector is controlled within a range of + -0.1 mm, a servomotor system with a rated power of more than 5kW must be used, which makes the power unit more than 60% of the equipment procurement costs. The structural deficiencies of the prior art stem from the inherent characteristics of multi-axis linkages. Synchronous control of dual-axis systems requires the configuration of high precision encoders and dedicated motion control cards, resulting in an exponential increase in electrical system complexity. Industry statistics show that 35% of the failure rates of such equipment stem from inter-axle motion mismatch problems and that each maintenance requires more than an average of 6 hours of downtime. More critical, to compensate for the transmission error of multi-axis superposition, a lightweight component such as carbon fiber composite material must be used, which increases the material cost of a single device by about 2.8 ten thousand yuan. In addition, the continuous operation of the high-power motor causes the energy consumption cost to account for 42% of the total life cycle cost of the equipment, and the annual power consumption can reach 4.3 ten thousand degrees in the 24-hour continuous production scene, which forms a remarkable contradiction with the current green low-carbon development trend of the manufacturing industry. Aiming at the technical pain point, the development of the novel rotary displacement mechanism has remarkable economic benefit and engineering value. Disclosure of utility model The application aims to at least overcome one defect in the prior art and provide a rotary displacement mechanism to solve the problems of high manufacturing cost, high energy consumption and frequent maintenance of the existing double-shaft linkage mechanical arm caused by complex structure, and specifically comprises the steps of reducing the complexity of equipment and the number of parts and the assembly cost by simplifying a multi-shaft driving system; the multi-axis synchronous control system has the advantages of eliminating the multi-axis synchronous control requirement to improve the reliability of the system, optimizing the motion conversion structure to reduce the dependence of a high-power unit, thereby reducing the energy consumption and the running cost, realizing the high-precision pose control through an integrated composite motion track constraint mechanism, and avoiding the positioning deviation of the traditional multi-axis mechanism caused by the accumulated error of a transmission chain. The mechanism particularly aims at a heavy workpiece reversing and shifting scene, ensures the load capacity of more than 50kg, simultaneously realizes the composite motion output of translation and rotation by a single driving source, and meets the requirements of an industrial production line on low-cost, high-energy-efficiency and compact automatic equipment. In order to achieve the above purpose, the application discloses a rotary displacement mechanism, which comprises a base, a driving unit, a compound motion assembly and an end execution unit. The base is provided with a linear guide rail and a composite guide groove which extend along a first axial direction, the composite guide groove is formed by continuously connecting a linear guide section, an arc-shaped transition section and an angle correction section, the linear guide section and the linear guide rail are arranged in parallel, and t