SU1681992A1 - Universal spindle hinge - Google Patents

Abstract

The invention relates to metallurgical engineering and can be used in the drive rolls of rolling mills, as well as the correct and other machines. The purpose of the invention is to increase the durability and maintainability of the hinge. The torque from the shaft to the fork is transmitted through the blade connected to the fork via sliding pads. The blade contacts the curved outer curved surfaces. The yoke is attached to the plug. Each outer surface of the blade, in contact with the holder, is formed by a spherical and conical surfaces adjacent to it on both sides. The sphere diameter is determined by the analytical relationship, and the spherical surface is made within the double spindle skew angle. Tapered surfaces have taper angles equal to the double spindle skew angle. The blade and the shaft are coupled to each other along a spherical axis, which can be in contact with the conical surface of the flange fixed in the cage. Fastening the holder with a fork made bayonet. This makes it possible to increase the accuracy of the mating parts of the hinge with each other, simplify the assembly and disassembly of the spindle during repair work, and increase the interchangeability of parts. 7 il. NW Yo

Description

The invention relates to metallurgical engineering and can be used in drives of rolls of rolling mills, as well as regular and other machines.

The purpose of the invention is to increase the durability and maintainability of the hinge.

1 shows the hinge of the universal spindle, a general view. lengthwise cut; figure 2 is the same, top view, longitudinal section; in FIG. 3, view A in FIG. 1; figure 4 - section bb in fig.Z; figure 5-node I figure 1; figure 6 - hinge with

spindle misalignment; Fig. 7 shows, in the spatial coordinate system, the inner cylindrical surface of the yoke and one of the planes of the blade.

The universal spindle hinge includes a blade 1 (Figures 1, 2, 5 and 6) at the end of the shaft 2, a cylindrical plug 3 with a shed 4 and a groove 5, inserts 6 mounted in the shed 4 of the fork 3, a junction of the plug 3 and inserts 6 s blade 1 shaft 2

The node connecting the plug 3 and liners 6 with the blade 1 of the shaft 2 is made in the form of a holder 7. mounted on a cylindrical bench oo

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8 of the plug 3 can be rotated around the axis 9 of the plug 3, and the outer surface 11 of the blade 1 facing the inner cylindrical surface 10 of the holder 7 is formed by a spherical 12 and the spherical outer surface 12 of the blade 1 is in contact with two conical surfaces 10 of the holder 7. the outer surface 12 of the blade 1 is made within the double angle 2 of the spindle skew and has a diameter D defined by the formula

D

; 2Y

R2 + g - b h tg a h

cos2a where R is the radius of the plug 3 at the junction

forks 3, clips 7 and blades 1;

L is the possible displacement of the center Oi of the spherical outer surface 12 of the blade 1 from the center O of the hinge;

b - blade thickness 1;

and - the spindle skew angle.

The conical outer surfaces 13 and 14 of the blade 1 are joined along the tangent and spherical outer surface 12 of the blade 1 and have a cone angle equal to double the angle 2 and the spindle skew. The transition from the conical outer surface 14 of the blade 1 to the shaft 2 is made in the form of spherical cac 15, conjugated with its spherical outer surface 16 to the inner conical surface 17 of the flange 18. At the same time, the flange 18 is rigidly fixed in the cage 7. At the end of the blade 1, a protrusion is made 19 with a spherical support surface 20. A protrusion 19 of the spherical support surface 20 contacts with the inner end face 21 of the groove 5 of the plug 3. On the cylindrical outer surface 8 of the plug there is an outer annular collar 22, which is installed in holder 7 annular groove 23.

In addition, in the casing 7, at least two inner shoulders 24, equally spaced around the circumference, are made in which sections of an L-shaped cross section 25 are installed to connect the casing 7 with the fork 3. Each section 25 is fixed against rotation relative to the holder 7, for example, by means of a bolt 26. The distance And circumferentially between the inner shoulders 24 in the holder 7 exceeds the width h of section 25. In addition, the holder 7 has an annular groove 27 in which Seals 28, and the holder 7 and the shaft 2 of the spindle covers a corrugated flexible, for example, from oil-resistant rubber casing 29 with the possibility of slipping along the shaft 2

when turning the holder 7 relative to the fork 3,

In the case when the blade 1 in the spindle hinge does not have axial mobility and when the center Oi of the outer spherical surface 12 of the blade 1 coincides with the center of the hinge O (i.e., the center Oi of the outer spherical surface 12 of the blade 1 coincides with the axis of the shed 4 under the bushings 6 plug 3), the diameter D of the outer spherical surface 12 of the blade 1 can be taken to be equal to the inner diameter DI of the sleeve 7 which is put on the plug 3.

However, under real conditions, to compensate for inaccuracies in manufacturing and installation, as well as to change the distance between the centers of the spindle hinges as the angle a changes between the spindle gear shafts 2, axial mobility h in the joint is provided, which is implemented in different designs differently.

In the proposed connection, the axial mobility h is realized by moving the blade 1 with the shaft 2 along the axis 9 of the fork 3, i.e. the center Oi of the outer spherical surface 12 of the blade 1 relative to the axis of the inserts 6 (the axis of the pharynx 4 in the fork 3) is displaced along the axis 9 of the fork 3 to one side or the other by an amount h. With such an axial displacement h and at a relative misalignment of the shaft 2 of the spindle transmission at an angle a, the maximum radial displacement of the center of the center of the outer spherical surface 12 of the blade 1 from the axis 9 of the fork 3 is hsin a, which corresponds to the required reduction of the radius of the external spherical surface 12 of the blade 1, outer spherical surface 12 is not truncated. But since the outer spherical surface 12 of the blade 1 is truncated by two planes 30 intersecting the outer spherical surface 12 around the circumference, the radius of the outer spherical surface 12 of the blade 1 is the distance from the cent Oi of the outer spherical surface 12 of the blade 1 to the point of tangency of the circle with the outer the cylindrical surface 8 of the fork 3 (the inner cylindrical surface 10 of the yoke 7) or, which is the same as the minimum distance of communes from the center Oi of the outer spherical surface 12 of the blade 1 to the points of the ellipse where the plane 30 theoretically intersects the inner cylindrical surface 10 of the yoke 7.

Fig. 7 shows a cylindrical surface of radius R. corresponding to the inner cylindrical surface 10 of the yoke 7. At point O, corresponding

the center of the hinge, the origin of the coordinate system is placed, with the Y axis directed along the axis of the inner cylindrical surface 10 of the yoke 7, the Z axis along the axis of the inserts 6, i.e. along the axis of the cylindrical groove in the fork 3. At a distance equal to half the thickness b of the blade 1, a plane is drawn parallel to the Z axis and at an angle a to the axis I. This plane corresponds to the lateral working plane 30 of the spindle blade 1 and intersects with the inner cylindrical surface 10 in ellipse. The center Oi of the outer spherical surface 12 of the blade 1 is shifted from the center of the hinge (point O) by the value h to the point K (parallel to the plane 30).

The cylindrical surface of radius R in the selected coordinate system (Fig. 7) is described by the equation

X2 + Z2 R2,

and the plane corresponding to the working plane 30 (Fig. 1 and 7) of the blade 1, is the equation

Xcosct - Islna a.

The joint solution of these equations, i.e. system

Jxcosa-l sina a

an ellipse in which plane 30 intersects with a cylinder. Point K (the center of the outer spherical surface 12) has coordinates

Hk hsln a; YK hcosez; ZK 0.

The distance from the points of the ellipse to the point K can be determined by the formula

(X-XK) 2 + (Y-YKf + (Z-ZK) 2.

After the substitution of the coordinates of the point K and the equations of the ellipse and the corresponding prv shapes, they get

r-VR2 + h2 + Y2-2ha- --2hy Vcos O.cos CC.

I will investigate this function by extremum using known methods, find

 - YR2 + h2 2haJ5 na h

± cos a

since 2a b - the thickness of the blade 1 then

Gmin - VR2 + h2 bhJ na jf

cosa cos2 a

Thus, the diameter D of the outer spherical surface 12 of the blade 1 must be determined by the formula

0 2 Gmin

R2 + h2

b h tg a -

7G

Cos2ot

where R is the radius of the plug Z at the junction of the plug 3, the holder 7 and the blade 1;

h is the possible displacement of the center Oi of the spherical outer surface 12 of the blade 1 from the center O of the hinge;

b - blade thickness 1;

a - spindle skew angle. The assembly and operation of the hinge is carried out as follows.

The fork 3 and the blade 1 of the hinge is set so that the axis of the liner 6 is located horizontally. After laterally between the fork 3 and the blade 1, the lower liner b is installed first, and then the blade 1 is lowered onto it and the upper

insert 6. Next, they move along the cylindrical surface 8 of the fork 3 of the sleeve 7 up to the stop into the annular shoulder 22 of the fork 3. After that, between the inner shoulders 24 of the holder 7, sections 25 of the L-shaped form are inserted into

section. Then the sections 25 are moved along the cylindrical surface 8 of the plug 3 until the sections 25 are aligned with the inner shoulders 24 of the cage 7. Then each section 25 is fixed against rotation relative to the casing 7, for example, by means of one bolt 26. Thereafter, through a channel (not shown) in the cage 7 the lubricant is supplied to the joint of the plug 3 and the liners b with the blade 1 of the shaft 2.

When rotating the drive shaft (not shown) and the plug 3, it transmits the rotation of the blade 1, which is rigidly connected to the shaft 2, through the inserts 6. The holder 7 with a seal 28 covering the cylindrical

the surface 8 of the plug 3, as well as the case 29, covering the holder 7 and the shaft 2, seal the hinge of the universal spindle against lubricant leakage and ingress of abrasive dust, dirt, scale, water, etc.

The proposed universal spindle hinge allows to increase its durability and reliability.

Claims (1)

Claims of Invention A universal spindle hinge containing a plug and blade fixed inside a cylindrical yoke and a blade on the end of a spindle shaft, having curved outer surfaces in contact with the inner surface of the yoke when This fork and blade mate with each other by means of inserts placed in the fork throat with the ability to move the blade and inserts along their longitudinal axes, the sealing element fixed on the end of the yoke, characterized in that, in order to increase the durability and maintainability of the hinge, the outer surface of the blade formed by spherical and conical surfaces mating to it from two sides, while the spherical surface of the blade is made within a double spindle skew angle and has a diameter equal to D 2VR2 + h2-bhtg "Ј cos2 a where R is the radius of the plug at the junction of the holder, fork and blade; 15 h is the possible displacement of the center of the spherical outer surface of the blade from the center of the hinge; B is the blade thickness; a is the spindle skew angle, and each of the conical surfaces of the blade has a taper angle equal to the double spindle skew angle, and the transition from the outer surface of the blade to the shaft is made in the form of spherical belt in contact with its spherical outer surface with the inner conical surface of the flange fixed inside the holder, and the holder of the holder and fork is made in the form of a bayonet connection. 21 20 22 23 28101 7 3 Ю 25 27 30 13 12 W 15 17 18 23 29 1 20 23 28 5 b 30 8 S 1 16 15 3 21 7 22 27 19 H 6 11 17 18 23 2 29 16 IS 10 6 4 JO 28 27 23 7 3 FIG. 2 19 28 23 2V 7T7 18 17 10 U 12 13 30 27 22 25 3  11 308 6 5 19 22 20 21 FIG. / 1SUS 17/8 - 7 21 thirty . sixteen . FIG. five 23 22 28511b hMYA 6/0/517/8 / 6 29 2 27/9 6 30 / FIG. 6 25 24 22 28 27 S / Fy 29 FIG. one