Effort-saving wrench socket and manufacturing method thereof

Abstract

The invention, belonging to automobile repair tool, discloses an effort-saving wrench socket, specifically an effort-saving wrench socket and a manufacturing method thereof, the socket is arranged at the periphery of a planetary carrier gear set, the lower part of the inner wall of the socket and the planetary carrier gear set constitute a transmission pair, the upper part of the socket is in sliding fit with a front output large lever set, and a support arm is arranged on the surface of the outer wall of the socket; and the support arm adopts a complex structure in which connecting sheets are provided with inner support frames in a clamping manner. The manufacturing method thereof comprises the technological steps of: manufacturing the connecting sheets with steel plates, forming the supporting arm with complex structure by means of the fixed connection of the inner support frames; manufacturing the socket and achieving fit connection between the supporting arm and the socket, and assembling the planetary carrier gear set and the front output large lever set on the inner wall of the socket, etc. The wrench socket according to the invention solves the problems of large possibility of gear hobbing and impact on service life of product in the prior art. The wrench socket also has the advantage that the supporting arm has large bending strength and long service life.

Description

technical field [0001] The invention belongs to an automobile repairing tool and is an accessory of a labor-saving wrench. Specifically, it is a labor-saving wrench socket and a manufacturing method thereof. Background technique [0002] The labor-saving wrench is driven by the crank handle and the planetary carrier gear set. After three-stage speed change, the input end of the front output bar is put on the wind gun head, and then the wind gun head is put on the car tire screw nut, and the support arm is connected to the other screw. Screw nut, shake the rocker, the screw nut can be loosened or tightened in forward and reverse directions. Due to the large tonnage of the car now, the fixing force of the tire screw nut is required to be increased. In the past, the booster rod could not meet the strength requirements for disassembling the car tire screw nut, so the car tire labor-saving wrench is generally used to disassemble the screw nut. [0003] The barrel body of the la...

AI Technical Summary

Problems solved by technology

Due to the large tonnage of the car now, it is necessary to increase the fixing force of the tire screw nut. In the past, the booster rod could not meet the strength requirements for disassembling the car tire screw nut, so the car tire labor-saving wrench is generally used to disassemble the screw nut.

[0003] The barrel body of the labor-saving wrench in the market now adopts one-time casting, including the barrel body and the support arm. During casting, there will inevitably be water vapor in the sand mold or the flow of molten iron is affected by temperature and water vapor during casting, and the cast barrel body will inevitably have air bubbles. , trachoma, because the equipment of the small foundry is not up to standard, and the molten iron is manually mixed with scraps and trace elements, so the quality of the raw materials is difficult to guarantee. Due to the limitation of the process of waxing the wax mold for precision casting steel, the support arm can only be I The structure, the root of the support arm is diverted due to molten iron, and the thickness is thick, it is easy to form a cavity during casting. Since the support arm needs to bear the torsion of the total output power during work, the force is very large, and the force is the largest at the root, so when using Sometimes there is a broken arm phenomenon, and the cylinder is deformed into an ellipse

Due to the elliptical deformation of the cylinder, the gap between the inner tooth circle and the planetary carrier gear set is inconsistent. If the design is precise, the planetary carrier gear set with large deformation cannot be installed and operated, so the center distance of the gears is forced to increase during design.

When working, the three sets of planetary gear sets swing back and forth, the meshing force is uneven, and the gear surfaces cannot be meshed in parallel, which consumes a lot of power, causing the labor-saving wrench to not really save labor, and it is easy to roll the teeth, which seriously affects the service life of the product. , and even the barrel breaks

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