Switch for controlling rotation of mechanical arm

Abstract

A switch for controlling a mechanical arm to rotate comprises two mechanical arm bodies (1), a son gear (2), a mother gear (3), a spring (4) and a connecting shaft (5). One arm body of the mechanical arm is fixedly connected with a son gear, the other arm body of the mechanical arm is fixedly connected with a mother gear, a spring is clamped between the two gears, the two arm bodies of the mechanical arm, the son gear, the mother gear and the spring are connected into a whole in a penetrating mode through a connecting shaft, and when the two gears and the two arm bodies, fixedly connected with the two gears, of the mechanical arm are pushed to the two ends of the connecting shaft through tension of the spring, the two gears are meshed. And when the two gears and the two arms of the mechanical arm are pressed by external force to be close to the middle section of the connecting shaft, the son gear enters a toothless cavity in the mother gear, the two gears are separated, and at the moment, the two arms of the mechanical arm can freely rotate around the connecting shaft so as to adjust the angle for bearing the heavy object. A new scheme is provided for rotation control of the mechanical arm which bears light load, and compared with an existing mode that rotation is controlled through an elastic screw, the mechanical arm has the advantages of being easy and convenient to operate and not prone to slipping and rotation.

Description

Technical Field

[0001] This patent belongs to the technical field of mechanical load-bearing equipment, especially small load-bearing equipment controlled by hand. Background Art

[0002] There are two existing technologies for adjusting the load-bearing angle of a mechanical arm: electric control and manual control. Electric control is mainly used for equipment with a larger load-bearing capacity and more expensive equipment, while manual control is mainly used for equipment with a lighter load-bearing capacity and household equipment. Manual control mainly uses a loosening screw to fix the rotation angle between the two arms. It is a cumbersome operation to first loosen the screw to adjust the load-bearing angle and then tighten the screw. In addition, the screw often cannot be tightened, causing the two arms to slip and rotate. Summary of the invention

[0003] A switch for controlling the rotation of a mechanical arm comprises two arms of the mechanical arm (1), a sub-gear (2), a mother gear (3), a spring (4), and a connecting shaft (5). One arm of the mechanical arm is fixedly connected to the sub-gear, and the other arm of the mechanical arm is fixedly connected to the mother gear. A spring is sandwiched between the two gears. The connecting shaft connects the two arms of the mechanical arm, the sub-gear, the mother gear, and the spring to form a whole. When the tension of the spring pushes the two gears and the two arms of the mechanical arm fixedly connected to the two gears to the two ends of the connecting shaft, the two gears mesh. At this time, the two arms of the mechanical arm cannot rotate around the connecting shaft, and the mechanical arm is in a state of carrying a heavy object. When an external force presses the two gears and the two arms of the mechanical arm to the middle section of the connecting shaft, the sub-gear enters the toothless cavity inside the mother gear, and the two gears are disengaged. At this time, the two arms of the mechanical arm can rotate freely around the connecting shaft to adjust the angle of the loaded object. This patent provides a new solution for the rotation control of a mechanical arm with a lighter load. Compared with the existing method of controlling the rotation with a loose screw, it has the characteristics of being easy to operate and not prone to slipping rotation. BRIEF DESCRIPTION OF THE DRAWINGS

[0004] Attached Figure 1 The schematic diagram of the structure of a switch for controlling the rotation of a mechanical arm is shown in the figure. In the figure, 1, two arms of the mechanical arm, 2, sub-gears, 3, mother gears, 4, springs, and 5, connecting shafts. DETAILED DESCRIPTION

[0005] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments, and the present invention is not limited to the following embodiments. As shown in the figure, the present invention is a switch for controlling the rotation of a mechanical arm, comprising two arms of the mechanical arm (1), a sub-gear (2), a mother gear (3), a spring (4), and a connecting shaft (5). One arm of the mechanical arm is fixedly connected to the sub-gear, and the other arm of the mechanical arm is fixedly connected to the mother gear. A spring is clamped between the two gears. The connecting shaft connects the two arms of the mechanical arm, the sub-gear, the mother gear, and the spring to form a whole. When the tension of the spring pushes the two gears and the two arms of the mechanical arm fixedly connected to the two gears to the two ends of the connecting shaft, the two gears mesh. At this time, the two arms of the mechanical arm cannot rotate around the connecting shaft, and the mechanical arm is in a state of carrying a heavy object. When an external force presses the two gears and the two arms of the mechanical arm to the middle section of the connecting shaft, the sub-gear enters the toothless cavity inside the mother gear, and the two gears are disengaged. At this time, the two arms of the mechanical arm can rotate freely around the connecting shaft to adjust the angle of the load. The above is only a preferred embodiment of this patent and does not impose any limitation on this patent. Any simple modification, change and equivalent structural change made to the above embodiments based on the essence of the patent technology are still within the protection scope of the technical solution of this patent.

Claims

1. A switch for controlling the rotation of a mechanical arm, comprising two arms of the mechanical arm (1), a sub-gear (2), a mother gear (3), a spring (4), and a connecting shaft (5). One arm of the mechanical arm is fixedly connected to the sub-gear, and the other arm of the mechanical arm is fixedly connected to the mother gear. A spring is sandwiched between the two gears. The connecting shaft connects the two arms of the mechanical arm, the sub-gear, the mother gear, and the spring to form a whole. When the tension of the spring pushes the two gears and the two arms of the mechanical arm fixedly connected to the two gears to the two ends of the connecting shaft, the two gears mesh. At this time, the two arms of the mechanical arm cannot rotate around the connecting shaft, and the mechanical arm is in a state of carrying a heavy object. When an external force presses the two gears and the two arms of the mechanical arm to the middle section of the connecting shaft, the sub-gear enters the toothless cavity inside the mother gear, and the two gears are separated. At this time, the two arms of the mechanical arm can rotate freely around the connecting shaft to adjust the angle of the load.

2. A switch for controlling the rotation of a mechanical arm according to claim 1, characterized in that: The extension direction of the two arms of the robot arm can be perpendicular to the connection axis or coincide with the connection axis.

Images