High pressure oil pipe nut tightening wrench

Abstract

The invention discloses a tightening wrench of a high-pressure tubing nut. The tightening wrench comprises a connection device and a tightening head; the connection device comprises a connection base and a bevel gear which is arranged in the connection base in a penetrating mode; the tightening head comprises a base, a bevel gear worm pair, a worm gear straight gear pair, an intermediate gear and a tightening gear; the bevel gear worm pair, the worm gear straight gear pair, the intermediate gear and the tightening gear are arranged in the base; the base is connected with the connection base in a rotating mode; the bevel gear worm pair comprises a coaxial worm conical tooth and a worm; center axes of the worm gear straight gear pair and the bevel gear worm pair are arranged in 90 degrees; the worm gear straight gear pair comprises a coaxial worm gear and a straight gear; the bevel gear is meshed with the worm conical tooth; the worm is meshed with the worm gear; the tightening gear is driven by the straight gear through the intermediate gear; the inside of the tightening gear is provided with a sleeve which is provided with a sleeve open groove. According to the tightening wrench of the high-pressure tubing nut, the structure is simple and reasonable; the operation is simple and convenient; the connection device rotates relative to the tightening head, the interference of parts arranged around a high-pressure tubing is avoided, and accordingly the tightening efficiency of the high-pressure tubing nut can be improved.

Description

Technical field [0001] The invention relates to the field of tightening wrenches, in particular to a high-pressure oil pipe nut tightening wrench. Background technique [0002] At present, when tightening the high-pressure fuel pipe nut during the engine assembly process, because the high-pressure fuel pipe runs through the nut, common tools such as sleeves and torx wrenches cannot be inserted into the high-pressure fuel pipe nut. Therefore, general tools such as sleeves cannot be used for quick tightening. Generally, the following Tighten in two ways: ①Tighten by hand with an open-ended wrench and then use a fixed torque wrench to tighten the torque. The distance between the two high-pressure oil pipe nuts is very short, which is affected by the two adjacent high-pressure oil pipe nuts and The surrounding parts interfere. When the high-pressure oil pipe of some engines is tightened, the open end wrench can only turn the nut at an angle of less than 90° at a time. A nut needs to ...

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Problems solved by technology

[0002] At present, when tightening the high-pressure oil pipe nut during the engine assembly process, because there is a high-pressure oil pipe in the middle of the nut, ordinary tools such as sockets and ring wrenches cannot be inserted into the high-pressure oil pipe nut, so general-purpose tools such as sockets cannot be used for fast tightening. Generally, the following Tighten in two ways: ①Tighten by hand with an open end wrench and then use a constant torque wrench to retighten the torque. Due to the interference of surrounding parts, when the high-pressure oil pipe of some engines is tightened, the open-end wrench can only turn the nut at an angle of less than 90° at a time, and a nut needs to be tightened many times before it can be tightened. The wrench tightens the nut, and its torque accuracy is uncontrollable. After tightening, it needs to be tightened again with a torque control wrench to ensure that the tightening torque of the nut meets the process requirements; An electric wrench that automatically tightens the high-pressure oil pipe nut. Due to the influence of the shape of the high-pressure oil pipe of the engine and the interference of the surrounding parts, this type of open-end wrench can only tighten the high-pressure oil pipe nut of a small number of engines. When the high-pressure oil pipe nut of some engines is tightened, the high-pressure oil pipe The parts next to it are higher than the nut of the high-pressure oil pipe, and interfere with the rear part of the wrench, so that the wrench cannot be inserted into the nut of the high-pressure oil pipe

[0003] When the production cycle of the engine is high, the use of ordinary open-end wrenches cannot meet the production cycle requirements due to low efficiency, and the open-ended electric tool cannot meet the high-pressure oil pipe tightening of various types of engines due to the interference between the rear part of the wrench and the parts around the high-pressure oil pipe. , long operation time, low production efficiency, and the process of tightening the high-pressure oil pipe of the engine is often the production bottleneck in the engine assembly process

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