CN209831468U - Screw tightening wrench - Google Patents

Abstract

The utility model relates to a screw thread tightening wrench belongs to the part assembly field. The utility model discloses an tightening wrench, which comprises a positioning ring, a wrench ring and a wrench rod; the upper part of the positioning ring is a cylindrical connecting piece, and a connecting thread is processed on the inner wall of the cylindrical connecting piece; a connecting plate extends outwards along the radial direction outside the end part of the lower end of the cylindrical connecting piece, and a connecting screw hole is formed in the connecting plate; the wrench ring is an annular connecting plate, the inner diameter of the wrench ring is smaller than the outer diameter of the rear end of the rear section of the spray pipe to be tightened, a connecting screw hole is formed in the wrench ring, and a wrench rod is fixedly welded on the lower plate surface of the wrench ring; the spanner ring is fixed with the connecting plate of the positioning ring through a fastening screw and a fastening nut. The screw tightening wrench of the utility model has simple structure and convenient use; can guarantee to treat the reliable threaded connection of tight piece during the assembly, when dismantling, can not influence the reverse not hard up of tight piece, guarantee the screw fastening power of tight piece.

Description

Screw tightening wrench

Technical Field

The utility model relates to a screw thread tightening wrench belongs to the part assembly field.

Background

A certain spray pipe product comprises a spray pipe front section and a spray pipe rear section, as shown in fig. 1, the butt joint ends of the spray pipe front section and the spray pipe rear section are mutually matched connecting threads, the rear end part of the spray pipe rear section is an external thread, and the connecting threads at the two ends of the spray pipe rear section are in the same direction. During spray tube product assembly, press from both sides tight fixed or fixed with the front end equipment earlier with the spray tube anterior segment, will take internal thread's spanner screw thread to fix the rear end at the spray tube rear end again, make spray tube anterior segment and spray tube rear end screw thread tighten through rotatory spanner, can realize when using this spanner to tighten that spray tube anterior segment and spray tube rear end threaded connection target in place. However, when the wrench is dismounted, the connecting thread directions at the two ends of the rear section of the spray pipe are the same, and the rotating force of the dismounting wrench can drive the rear section of the spray pipe to rotate reversely, so that the screw fastening force of the front section of the spray pipe and the rear section of the spray pipe is insufficient.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving traditional screw thread tightening wrench and when unloading the spanner, can make to take place the antiport between the screw thread tightening piece, lead to the not enough problem of screw thread tightening force, and provide a screw thread tightening wrench.

The utility model aims at realizing through the following technical scheme:

the utility model relates to a screw tightening wrench, which comprises a positioning ring, a wrench ring and a wrench rod;

the upper part of the positioning ring is a cylindrical connecting piece, and a connecting thread matched with the external thread at the rear end of the rear section of the spray pipe to be tightened is processed on the inner wall of the cylindrical connecting piece; a connecting plate extends outwards along the radial direction outside the end part of the lower end of the cylindrical connecting piece, and a connecting screw hole is formed in the connecting plate;

the wrench ring is an annular connecting plate, the inner diameter of the wrench ring is smaller than the outer diameter of the rear end of the rear section of the spray pipe to be tightened, a connecting screw hole matched with the connecting screw hole in the positioning ring connecting plate is formed in the wrench ring, and a wrench rod is fixedly welded on the lower plate surface of the wrench ring;

the spanner ring is fixed with the connecting plate of the positioning ring through a fastening screw and a fastening nut.

Working process

During assembly, the positioning ring of the screw tightening wrench is connected to the rear end of the rear section of the spray pipe to be tightened in a threaded manner; the rear section of the spray pipe to be tightened and the front section of the spray pipe are assembled in place through the threads by rotating the wrench rod. When the screw tightening wrench is disassembled, firstly loosening the fastening screw and the fastening nut which fix the wrench ring and the positioning ring, separating the wrench ring from the positioning ring, and leaving the rear end face of the rear section of the spray pipe to be tightened; at the moment, the spanner ring and the rear section of the tightened spray pipe only have friction force between threads, and the friction force is far smaller than the resultant friction force between the butt end face and the threads between the rear section of the tightened spray pipe and the front section of the spray pipe, so that the spanner ring can be easily dismounted from the rear section of the tightened spray pipe to finish assembly operation.

Advantageous effects

The screw tightening wrench of the utility model has simple structure and convenient use; can guarantee to treat the reliable threaded connection of tight piece during the assembly, when dismantling, can not influence the reverse not hard up of tight piece, guarantee the screw fastening power of tight piece.

Drawings

FIG. 1 is a schematic view of the assembly of a nozzle front section to be tightened and a nozzle front section rear section;

FIG. 2 is a front sectional view of the screw tightening wrench of the present invention;

FIG. 3 is a top view of FIG. 2;

FIG. 4 is a cross-sectional view of the screw tightening wrench according to the present invention in a tightened state;

FIG. 5 is a sectional view of the screw tightening wrench according to the present invention in a disassembled state;

in the drawings, 1-positioning ring; 2-spanner ring; 3-spanner bar.

Detailed Description

The invention is further described with reference to the following figures and examples:

examples

The utility model relates to a screw tightening wrench, as shown in fig. 2 and 3, comprising a positioning ring 1, a wrench ring 2 and a wrench rod 3;

the upper part of the positioning ring 1 is a cylindrical connecting piece, and a connecting thread matched with the external thread at the rear end of the rear section of the spray pipe to be tightened is processed on the inner wall of the cylindrical connecting piece; a connecting plate extends outwards along the radial direction outside the end part of the lower end of the cylindrical connecting piece, and a connecting screw hole is formed in the connecting plate;

the spanner ring 2 is an annular connecting plate, the inner diameter of the spanner ring 2 is smaller than the outer diameter of the rear end of the rear section of the spray pipe to be tightened, a connecting screw hole matched with the connecting screw hole in the connecting plate of the positioning ring 1 is formed in the spanner ring 2, and a spanner rod 3 is fixedly welded on the lower plate surface of the spanner ring 2;

the spanner ring 2 is fixed with the connecting plate of the positioning ring 1 through a fastening screw and a fastening nut.

Working process

During assembly, the positioning ring 1 of the screw tightening wrench is firstly in threaded connection with the rear end of the rear section of the spray pipe to be tightened, as shown in figure 4; the rear section of the spray pipe to be tightened and the front section of the spray pipe are assembled in place by rotating the wrench rod 3. When the screw is disassembled and the wrench is tightened, firstly, the fastening screw and the fastening nut which fix the wrench ring 2 and the positioning ring 1 are loosened, the wrench ring 2 is separated from the positioning ring 1, and the rear end face of the rear section of the spray pipe to be tightened is left, as shown in fig. 5; at the moment, the spanner ring 2 and the rear section of the tightened spray pipe only have friction force between threads, and the friction force is far smaller than the resultant force of friction between the butt end surface and the threads between the rear section of the tightened spray pipe and the front section of the spray pipe, so that the spanner ring 2 can be easily disassembled from the rear section of the tightened spray pipe to finish assembly operation.

Claims (1)

1. A screw tightening wrench is characterized in that: comprises a positioning ring, a spanner ring and a spanner rod;

the upper part of the positioning ring is a cylindrical connecting piece, and a connecting thread matched with the external thread at the rear end of the rear section of the spray pipe to be tightened is processed on the inner wall of the cylindrical connecting piece; a connecting plate extends outwards along the radial direction outside the end part of the lower end of the cylindrical connecting piece, and a connecting screw hole is formed in the connecting plate;

the wrench ring is an annular connecting plate, the inner diameter of the wrench ring is smaller than the outer diameter of the rear end of the rear section of the spray pipe to be tightened, a connecting screw hole matched with the connecting screw hole in the positioning ring connecting plate is formed in the wrench ring, and a wrench rod is fixedly welded on the lower plate surface of the wrench ring;

the spanner ring is fixed with the connecting plate of the positioning ring through a fastening screw and a fastening nut.