Platform perpendicular lifting mechanism with unchanged gravitational torque

Abstract

The invention discloses a platform vertical lifting mechanism with constant gravity moment, which belongs to the technical field of lifting equipment. It consists of a front lifting mechanism, a rear lifting mechanism, a platform and a base. The top of the platform is used to carry goods and the lower part is used to install related gears and pins. The structures of the front lifting mechanism and the rear lifting mechanism are exactly the same as the corresponding dimensions, which belong to virtual constraints. Application, jointly used to realize the motion transformation and force support of platform lifting, the front lifting mechanism is driven by the front hydraulic cylinder, the rear lifting mechanism is driven by the rear hydraulic cylinder, the two sets of hydraulic cylinders act synchronously, and the base is used to support related components and pins , can be used in a single section or in multiple sections. Whether it is a single-section mechanism or a multi-section combined mechanism, the degree of freedom of the present invention is always 1, and only one active part is needed to realize the vertical lift of the platform. When the platform is vertically lifted The moment of cargo gravity remains constant.

Description

technical field [0001] The invention relates to the technical field of lifting equipment, in particular to a platform vertical lifting mechanism with constant gravity moment. Background technique [0002] The lifting platform is an auxiliary tool. It is required to use the lifting platform in the process of mechanical manufacturing, warehousing and logistics, landscaping and pruning, and municipal maintenance. The driving of the lifting platform can be a combination of motor and hydraulic cylinder. It can be a combination of motor and reducer. The existing scissor lift platforms are either fixed or movable with wheels installed. Among the mechanisms used in the existing single scissor lift platforms, one is the top and The bottom is a single-section structure with an isosceles triangle. From the perspective of the mechanism, the top is a crank-slider mechanism with the same length as the crank and the connecting rod, and the bottom is a crank-slider mechanism with the same l...

AI Technical Summary

Problems solved by technology

[0002] The lifting platform is an auxiliary tool. It is required to use the lifting platform in the process of mechanical manufacturing, warehousing and logistics, landscaping and pruning, and municipal maintenance. The driving of the lifting platform can be a combination of motor and hydraulic cylinder. It can be a combination of motor and reducer. The existing scissor lift platforms are either fixed or movable with wheels installed. Among the mechanisms used in the existing single scissor lift platforms, one is the top and The bottom is a single-section structure with an isosceles triangle. From the perspective of the mechanism, the top is a crank-slider mechanism with the same length as the crank and the connecting rod, and the bottom is a crank-slider mechanism with the same length as the crank and the connecting rod. Because the bottom of the isosceles triangle The length of the side changes, so the bottom edge of the isosceles triangle on the lower part of the platform passes through a slider and the guide groove on the chassis to form a moving pair to realize the change in length, and the bottom edge of the isosceles triangle on the upper part of the platform passes through a slider It forms a moving pair with the guide groove on the bottom surface of the platform to realize the change of length. The two sets of mechanisms are symmetrical up and down with the horizontal axis passing through the fork point. The lifting range of this type of lifting platform is small. The support force on the rod changes, and the initial moment arms of the left swing rod and the right swing rod are both L 0 , when the weight rises H After that, the moment arm of the right swing link is also L 0 , but the moment arm of the left swing link is reduced to L 1 , the existing structure makes L 0 / L 1 It can reach 4 times, so that the strength design is calculated according to the maximum force, thus increasing the lateral size and weight of the component; During the lifting process, the moment arm on the left swing link or the right swing link is the essence of the change.

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