Multi-freedom-degree mechanical arm used for engineering vehicle and engineering vehicle

Abstract

The invention provides a multi-freedom-degree mechanical arm used for an engineering vehicle. The mechanical arm comprises a base, a rotating disc, a stand column, a cross beam, a pitching drive oil cylinder, a horizontal adjusting oil cylinder A, and a horizontal adjusting oil cylinder B, the base, the rotating disc, the stand column and the cross beam are sequentially connected, the pitching drive oil cylinder is hinged between the stand column and the cross beam, and is used for driving the cross beam to swing up and down with the hinge point of the cross beam and the stand column as the center, rod cavities of the horizontal adjusting oil cylinder A and the horizontal adjusting oil cylinder B communicate with rodless cavities, and a closed loop is formed between the horizontal adjusting oil cylinder A and the horizontal adjusting oil cylinder B; the mechanical arm is provided with multiple freedom degrees, and a safety table on the tail end of the cross beam is conveyed to the anyposition within the space work range. The invention further provides the engineering vehicle with the multi-freedom-degree mechanical arm, various work devices can be rapidly and reliably mounted on the mounting table, the mounting table can tend to the level most time, posture changes of a work device during work in the space is reduced, and stability is improved.

Description

technical field [0001] The invention relates to municipal engineering equipment, in particular to a multi-degree-of-freedom mechanical arm and an engineering vehicle for engineering vehicles. Background technique [0002] The mechanical arm is widely used on engineering vehicles to provide a suitable platform for high-altitude operations. The installation platform at the end of the mechanical arm for installing working devices (accessories) should be kept parallel to the ground most of the time to minimize installation The posture changes of the table and the working device (accessory) when performing various tasks in the space. There is an oil cylinder for adjusting the level between the mechanical arm of the existing engineering vehicle and the mounting table, but it often does not move at the same time as the main part of the mechanical arm, so that the mounting table is not kept horizontal during the movement of the mechanical arm. The mechanical arm is not suitable for...

AI Technical Summary

Problems solved by technology

There is an oil cylinder for adjusting the level between the mechanical arm of the existing engineering vehicle and the mounting table, but it often does not move at the same time as the main part of the mechanical arm, so that the mounting table is not kept horizontal during the movement of the mechanical arm. The mechanical arm is not suitable for the case where the working device (accessory) cannot be tilted excessively

[0003] Chinese patent 201610495856.X discloses a lifting mechanism. The lifting mechanism does not mention how to keep the platform basket (equivalent to the installation platform) as horizontal as possible during the movement of the mechanical arm. In addition, the lifting mechanism is not set Swivel mechanism with limited degrees of freedom and limited range of applications for engineering vehicles

And there are not many functional integrations, most of them have less than 3 functions, which is equivalent to a small amount of expansion of the engineering vehicle's functions

[0006] Chinese patent 201110111295.6 discloses a quick-change mechanism for multifunctional engineering machinery attachments. In this solution, the attachment of the attachments and the engineering vehicle is mainly ensured by its special-shaped pins. Its stability is difficult to ensure, and the attachments are disassembled When it is necessary to pull up the special-shaped pin shaft, the force used to pull up the special-shaped pin shaft must be greater than the force of the spring, and in order to ensure a certain connection strength, the elastic force of the spring should not be too small, so an external pulling tool is required for operation

In addition, the attachment of this scheme needs to be pulled while rotating its special-shaped pin shaft during installation, so that the upper end of the special-shaped pin shaft is aligned with the elongated hole on the locking mechanism and then the special-shaped pin shaft is released. In actual operation, due to The special-shaped pin shaft is pressed by a spring, so it needs to apply a large force to rotate the special-shaped pin shaft, and it also needs to use an external rotating tool. The operation process is complicated and the replacement speed is slow, which affects the work efficiency and the fastening effect is difficult. Guarantee, it is more difficult to achieve quick disassembly and quick installation of attachments

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