CN201889732U

CN201889732U - Angle indicating device

Info

Publication number: CN201889732U
Application number: CN 201020543347
Authority: CN
Inventors: 雷春伟; 刘丕人
Original assignee: Henan Diesel Engine Industry Co Ltd
Current assignee: Henan Diesel Engine Industry Co Ltd
Priority date: 2010-09-27
Filing date: 2010-09-27
Publication date: 2011-07-06
Anticipated expiration: 2020-09-27

Abstract

The utility model belongs to the technical field of mechanical assembly, and provides an angle indicating device, which comprises a flange (1), a wrench (6) with a dial (3), and adjusting bolts (2). The flange (1) is provided with a plurality of positioning holes corresponding to planar distribution positions of bolts (5) on a part (4), and a plurality of radially indicating reference lines (7) are peripherally and uniformly disposed on the flange (1). The adjusting bolts (2) for adjusting the end face of the flange (1) to be level to the bolts (5) are disposed on the flange (1) and uniformly distributed on the periphery of the flange (1), and the dial (3) connected to the wrench (6) is provided with a central hole corresponding to the head of each bolt (5) in shape. When the angle indicating device is used for tightening bolts, tightening angles of the bolts can be indicated precisely, stresses to the bolts are uniform, bolt failure caused by artificial factors is avoided effectively, assembling quality is promoted, and the angle indicating device has the advantages of reasonable structure and simplicity in manufacture.

Description

Angle indicating device

Technical field

The utility model belongs to the mechanical assembly technique field, relates generally to a kind of angle indicating device.

Background technology

Heavy parts is in assembling process, for guaranteeing the smooth working of big moving component, often need to connect with big specification bolt (more than the M20), big specification bolt needs very big moment of torsion (more than the 1000Nm) ability workpiece pressing when tightening, bolt to high pulling torque compresses, traditional way is: with a less moment of torsion bolt is carried out pretension earlier, continue to tighten a suitable angle again, also do not have a hand-operated tools to control exactly at present and tighten angle, mainly rule of thumb tighten by operating personnel.Owing to do not have proper tools,, cause actual angle and drawing of being twisted to require to differ greatly fully with operating personnel's subjective judgement.

Rundown process to bolt is at present: 10 uniform M27 * 2 * 290 bolts are example on the shock absorber to tighten, earlier torque spanner is transferred to the 370Nm moment of torsion, bolt is carried out even pretension respectively, drawing mark line on interior six sides of bolt with marking pen behind the pretension, and with mark line along growing on the associated fixture, then spanner being put extension bar tightens bolt again, observe two angles between the groove simultaneously and change, stupefied of six sides have promptly reached 120 ° in two when two mark lines miss.

As: M27 * 2 * 120,10 bolts are uniform, and assembly technology is tightened 60 ° after requiring to twist certain moment of torsion again.Tighten the tension formula of generation according to bolt:

In the formula: C: tighten angle; P: pitch; E: elastic modelling quantity=206000MPa; L: bolt length

If it is 1 ° that part is tightened differential seat angle, get by formula:

By result of calculation as can be known,, tighten angle and differ 1 °, will produce the stress difference of 9.54MPa the bolt of M27 * 2 * 120, in the practical set, the tightening angle and can differ greatly of bolt, therefore this mode is tightened and can be caused following consequence:

1, bolt strained inequality, machine vibration is big, galloping;

2, the bolt that thrust is little can not form self-locking, and the alternate load that runs up and produce of machine can make bolt looseness or comes off;

3, the residue bolt bears bigger alternate load, and long-play can make the big bolt of thrust finally cause fatigue fracture.

To the machine that runs up, no matter be bolt looseness, come off, or fatigue fracture, all can cause fatal harm, even jeopardize the personal safety of the staff around the machinery machinery.

Summary of the invention

The purpose of this utility model is to propose a kind of angle indicating device, make the big machinery part when connecting bolt stressed evenly, prevent that bolt from becoming flexible, coming off or fatigue fracture because of unbalance stress produces, and guarantees the even running of part.

The utility model is finished the technical scheme that its invention task taked:

A kind of angle indicating device is made of flange, the spanner that has dial and adjustment double-screw bolt; Have the corresponding to locating hole in bolt horizontal layout position on a plurality of and the part on the described flange, the radial finger that flange is provided with many circumference uniform distributions to datum line, described datum line is positioned on the prolongation ray of the locating hole center of circle and flange circle center line connecting; Described flange is provided with in order to adjust the end face of flange double-screw bolt concordant with bolt, and described double-screw bolt is evenly distributed on the circumference of flange; The described dial that is connected on the spanner has the centre bore consistent with the bolt head shape.

A kind of angle indicating device that the utility model proposes, when bolt is tightened, the angle of tightening that can accurately show bolt, reduce error, guarantee that each is bolt strained evenly, the bolt failure of avoiding human factor to cause effectively, the mechanical breakdown that minimizing causes because of bolt failure, improved assembly quality, it is reasonable to have an apparatus structure, makes characteristic of simple.

Description of drawings

Fig. 1 is a structural representation of the present utility model.

Fig. 2 is the vertical view of Fig. 1.

Among the figure: 1, flange, 2, adjust double-screw bolt, 3, dial, 4, part, 5, bolt, 6, spanner, 7, datum line.

The specific embodiment

With embodiment the utility model is further specified in conjunction with the accompanying drawings:

As shown in Figure 1 and Figure 2, a kind of angle indicating device, mainly constitute by flange 1, the spanner 6 that has dial 3 and adjustment double-screw bolt 2, among this embodiment, has 10 connections bolt 5 on the part 4, have on the described flange 1 10 with part 4 on the corresponding to locating hole in bolt 5 horizontal layout positions, the circumference of flange 1 be provided with 10 equally distributed radial fingers to datum line 7, every datum line 7 is positioned on the prolongation ray of a locating hole center of circle with the flange circle center line connecting; Flange 1 is provided with in order to adjust the concordant adjustment double-screw bolt 2 of flange 1 end face and bolt 5, among this embodiment, described adjustment double-screw bolt 2 is three, lays respectively at along in three screws of flange 1 circle distribution, regulates adjustment double-screw bolt 2 height and can make the head of bolt 5 concordant with flange 1 end face; Described dial 3 has and the consistent centre bore of bolt 5 nose shapes, among this embodiment, the head of described bolt 5 is interior hexagon, dial 3 centers process with bolt 5 heads in the consistent hexagonal hole of six sides, stick with glue agent it is adhered to six square toes roots of spanner 6, during spanner 6 work, dial 3 is nested with on bolt 5 with spanner, and the start index of dial 3 is corresponding with datum line.

The step of the concrete work of this device is as follows:

1, with predetermined moment of torsion successively with 10 bolts 5 pretension one by one;

2, flange 1 is enclosed within waits to tight a bolt 5 head, have datum line 7 one sides, regulate the height of adjusting double-screw bolt 2, make the end face of flange 1 concordant with the head of bolt 5 towards the operator;

The head of six square toes inserting bolts 5 that 3, will have the spanner 6 of dial 3;

4, read the number of degrees on the dial 3 of datum line 7 correspondences on the flange 1;

5, twist bolt 5, observe the angle that dial 3 is turned over respect to datum line 7 on the flange 1 simultaneously, when be screwed to technological requirement tighten angle after stop;

6, finish the work of tightening of each bolt 5 according to this.

Claims

1. an angle indicating device is characterized in that: be made of flange (1), the spanner (6) that has dial and adjustment double-screw bolt (2); Have a plurality of on the described flange (1) and the corresponding to locating hole in last bolt (5) the horizontal layout position of part (4), the radial finger that flange (1) is provided with many circumference uniform distributions to datum line (7), described datum line (7) is positioned on the prolongation ray of the locating hole center of circle and flange (1) circle center line connecting; Described flange (1) is provided with in order to adjust flange (1) the end face adjustment double-screw bolt (2) concordant with bolt (5), and described adjustment double-screw bolt (2) is evenly distributed on the circumference of flange (1); The described dial (3) that is connected on the spanner (6) has and the consistent centre bore of bolt (5) nose shape.