Wrench

Abstract

The invention belongs to the technical field of power transmission and transformation overhaul devices and particularly relates to a wrench which comprises a first connecting rod and a steering mechanism. A first rotating shaft is rotatably connected into the first connecting rod; one end of the first rotating shaft is provided with a universal joint; the steering mechanism comprises an outer shell, a first bevel gear and a second bevel gear, wherein the first bevel gear and the second bevel gear are arranged in the outer shell; a second rotating shaft is coaxially fixed to the first bevel gear; one end of the second rotating shaft stretches out of the outer shell and then is fixedly connected with the other end of the universal joint; the first bevel gear and the second bevel gear are connected in engaged and transmission modes; a third rotating shaft is coaxially fixedly connected to the second bevel gear; and one end of the third rotating shaft is provided with a sleeve after stretching out of the outer shell. According to the wrench, a traditional universal joint and the steering mechanism are subjected to matching design, the operating radius of the wrench is about 90-135 degrees, and the disassembling and assembling requirements of all bolts in a power transmission and transformation station are met.

Description

technical field [0001] The invention belongs to the technical field of power transmission and transformation maintenance devices, and in particular relates to a wrench. Background technique [0002] In 2015, the maintenance company of State Grid Henan Electric Power Company completed a total of 394 maintenance plans, mainly including the main transformer (reactor), circuit breaker, GIS interval, current transformer, voltage transformer, lightning arrester technical renovation overhaul, routine test and regular inspection Wait. Every work needs to involve the disassembly and assembly of bolts, and a large amount of disassembly and assembly work consumes manpower. A wrench can replace manpower for disassembly and assembly, which greatly improves work efficiency. However, a wrench mainly relies on traditional straight sleeves and universal joints for bolt disassembly and assembly. The application range of traditional universal joints is generally 0-35 degrees (maximum Not exc...

AI Technical Summary

Problems solved by technology

Every job needs to involve the disassembly and assembly of bolts, and a lot of disassembly and assembly work is labor-intensive

A wrench can replace manpower for disassembly and assembly, which greatly improves work efficiency. However, a wrench mainly relies on traditional straight sleeves and universal joints for bolt disassembly and assembly. The application range of traditional universal joints is generally 0-35 degrees (maximum not exceeding 45 degrees), it cannot be used when there is an obstruction above the bolt or the bolt in a narrow space

[0003] Application publication number CN106002806A discloses a wrench universal rotating tool, which includes a first steering component, and the first steering component includes a gear seat, a driving bevel gear with a rod, and a driven bevel gear with a rod. two gear seat holes perpendicular to each other, the driving bevel gear with rod includes a driving bevel gear and a driving rod, the driving rod is provided with a first groove, and the driven bevel gear with rod includes a driven bevel gear and a driven bevel gear. The driven rod, the driven rod is provided with a second groove, and the driving bevel gear with rod and the driven bevel gear with rod are respectively set in the first groove and the second groove by surrounding The two semi-circular copper sleeves on the groove are respectively fixed in the two gear seat holes, and the driving bevel gear and the driven bevel gear mesh in the gear seat; this structure can only realize 90° transmission , unable to cover all the bolt removal work in the prior art, the scope of use is narrow

[0004] Authorized notification number CN102941555B discloses a multifunctional wrench for narrow operation space, which includes a handle, a lever arm, a connecting rod, a bevel gear steering mechanism and a connecting head, the handle is fixedly installed on the front end of the lever arm, and the lever arm The rear end is fitted with the front end of the connecting rod, the rear end of the connecting rod is fitted with the front end of the bevel gear steering mechanism, the rear end of the bevel gear steering mechanism is fitted with a connecting head, and the connecting head is connected with the screw thread to be disassembled The bevel gear steering mechanism includes a pair of bevel gear assemblies that are meshed with each other, an L-shaped mounting bracket and a stud assembly. The bevel gear assembly is composed of a bevel gear, a gear shaft, a sleeve and double lock nuts. The bevel gear is fixed on one end of the gear shaft, and the gear shaft passes through the casing in a clearance fit and is assembled with double lock nuts. A prism-shaped cavity is provided at the other end of the gear shaft, and the gear shaft passes through the prism Shaped cavity is plugged with connecting rod or connecting head; this structure can only realize 90° transmission, which cannot cover all the bolt removal work in the prior art, and the scope of use is narrow

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