Double-input torque multiplication sleeve

Abstract

A double-input torque multiplication sleeve comprises a worm input shaft, a worm gear and a sleeve body, the worm input shaft, the worm gear and the sleeve body are rotationally connected with an outer shell, the worm input shaft and the worm gear are in meshing transmission, a worm gear shaft is arranged in the center of the worm gear, a transmission gear is arranged at the lower end of the worm gear shaft, and the transmission gear drives the sleeve body to rotate on the outer shell. The upper end of the worm gear shaft extends out of the outer shell to form a worm gear input shaft, one end or two ends of the worm input shaft penetrate out of the outer shell, and grooves used for containing a wrench head on a wrench are formed in the shaft body end portions of the worm input shaft and the worm gear input shaft penetrating out of the shell. By means of the characteristic that the size of a large screw or a nut is large, the diameter of a gear on the outer side of a sleeve is greatly larger than that of a gear below a rotating shaft of a worm gear, a large transmission ratio is formed, the total torque multiplication number is large, and fastening operation of the large screw is facilitated; therefore, a fast gear and a torque gear are respectively formed at two positions, and the device is suitable for actual use.

Description

technical field [0001] The invention relates to the field of assembly and disassembly tools, in particular to a double-input torque multiplication sleeve. Background technique [0002] In the construction industry and manufacturing industry, screw fastening is the most widely used fixed connection method. By using the physical and mathematical principles of the oblique circular rotation and friction of the object, the objects are fastened step by step. Because of its simple and practical structure, it is convenient for mass production and has received a large number of references. [0003] In the installation of large-scale steel components such as transmission towers, signal towers, and wind power piles, due to their large batch size, the installation accuracy needs to be good. In the fixing of the bottom foundation, most of them are pre-cast in the foundation with threaded holes according to the standard. The embedded parts are then connected with the threads in the embed...

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Problems solved by technology

[0003] In the installation of large-scale steel components such as transmission towers, signal towers, and wind power piles, due to their large batch size, the installation accuracy needs to be good. In the fixing of the bottom foundation, most of them are pre-cast in the foundation with threaded holes according to the standard. The embedded parts are then connected with the threads in the embedded parts by screws. Due to the precision of the threaded connection and the quick installation performance, it is suitable for the installation field of such large equipment. However, due to the heavy weight of these large equipment, the fastening of the base The screws are usually larger, and the size of the screws is usually above M64, which requires a very large pre-tightening torque. During installation, a compressor with a wind gun and a sleeve is generally used to ensure the tightening. The large-scale transportation is responsible for the equipment delivery, but when the installation is completed , in the process of follow-up inspection and maintenance, it is unacceptable in terms of cost to transport compressors and phoenix guns specially for fastening screws, and manual fastening obviously cannot meet the requirements of pre-tightening torque. Generally, structures are used to increase torque, such as increasing Measures such as the length of the wrench, but the pre-tightening torque of the M64 screw is 19353N m. If the length of the wrench is increased, it is obviously not enough to achieve it with manpower.

[0004] The existing technology also has a device for multiplying the torque. For example, the Australian patent document AU2018361223 uses planetary gears for torque multiplication, but the planetary gears around the input shaft in the planetary gear greatly expand the size of the device in the axial direction. Time and space are not enough to place a multiplier with sufficient torque, and the multiplier designed by the current space can only provide about 25 times of torque multiplication, and manpower needs to provide 19353 / 25=774.12 N·m torque, obviously manpower cannot achieve this kind of moment

[0005] While the torque is multiplied, the use of manpower for fastening also faces the problem of too large a transmission ratio and too many rotations. The torque multiplication will inevitably bring about a change in the transmission coefficient, and the torque multiplication is too large to make the input end rotate for more than one turn before the output end rotates. One turn, which makes the tightening time process longer and requires the operator to have higher physical strength

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