RU1633904C - Gear-type coupling - Google Patents

Abstract

The invention relates to mechanical engineering, and more specifically to couplings, and can most effectively be used in drives of rolling equipment. 1 The invention seeks to increase the durability of a coupling by equalizing clearances and reducing the magnitude of contact stresses. The gear clutch consists of gear sleeves 1, 2 with external involute teeth 3 and of a sleeve 4 that engages with the inner barrel-shaped teeth 5, The lateral surfaces of the teeth 3 of the sleeves 1, 2 are made longitudinally convex (concave), and the lateral surfaces of the teeth of the cage interacting with them are concave (convex). In this case, the radii of curvature of the mating surfaces of the casing and the sleeve are determined from the above relations. Thanks to this embodiment of the clutch, the wear and tear of the teeth is reduced due to the equalization of the congestion between the teeth and the favorable location of the contact zone of the interacting surfaces of the tooth of the sleeve in the longitudinal direction along the tooth of the cage. 6 ill. §

Description

IS

Fig, 1

The invention relates to mechanical engineering, in particular to couplings, and can be used in drives of rolling equipment for connecting shafts with angular misalignment of axes.

The purpose of the invention is to increase durability by equalizing clearances and reducing contact stresses.

In FIG. 1 depicts a proposed JQ gear coupling, general view; in FIG. 2 is a section AA in FIG. 1; in FIG. 3 is a section BB in FIG. 2; in FIG. 4 is a diagram of the location of the teeth in the zone of angles 0 °, 180 °, and also cjce- 15 ma of the location of the teeth in the zone of angles 90 °, 270 in section AA; in FIG. 5 is a section BB of FIG. 4; on ng, b - section GG in FIG about 4.

the nose of the lateral surfaces of the teeth of the sleeve and the cage and reduce their load. This is achieved by performing the interacting lateral surfaces of the teeth of the cage and the bushings according to the claims, while the radii of curvature of these surfaces should allow the sleeve to skew in the cage within the specified skew angle

The distribution of the gaps between the teeth during misalignment and the condition of the favorable contact zone of the interacting surfaces when moving the tooth of the sleeve in the longitudinal direction along the tooth of the holder substantially depend on the curvature of the lateral surfaces of the teeth of the bushings and the holder. Rptimal

Toothed coupling consists of gear to. boko

bushings 1,2c with the outer teeth 3 and the yoke 4 that engages with them with the inner teeth 5 (Fig. 1). The lateral surfaces of the teeth 3, 5 of the bushings and the holder in the middle end section 25 (Fig. 2) are made in the vertical direction along the involute. The lateral surface of the teeth of one of the gear elements is convex in the longitudinal direction. For example, the lateral surfaces of the teeth of 3 bushings 1,2 with a radius of curvature P .. The lateral surfaces of the teeth of the second gear element are concave in the longitudinal direction; For example, the lateral surfaces of the teeth 5 of the holder 4 are concave with a radius of curvature BЈ. The radii of curvature of the concave and convex surfaces of the eubes of the first and second gear elements are determined from the ratios

thirty

35

the outer surfaces of the teeth of the cage and bushings on the dividing circle in the cross-section tangent to the main cylinder provide a reduction in the spacing and magnitude of the contact stresses and, consequently, a reduction in the load on the teeth and their wear.

In the coupling made according to the formula, a change in the gap between the teeth of the sleeve and the holder will be observed both near the plane coordinated by the angles (0 °, 180 °, equal to As AX, and in the plane coordinated by the angles If - 90 °, 270, equal to

AS -uq. Moreover, the same sign.

Reducing and equalizing the discrepancy is provided by the convergence of the variation values of the gap of the eubu located in the zone of angles 0 °, 180 ° 40 and angles If 90 °, 270 °. Thus, the maximum ranoezapor, will be equal to the absolute value of the difference of the gaps, i.e. ft -AY) (Fig. 4).

G, sin G).

8 "Rt44Q

radius of curvature

the lateral surface of the eubes of the first gear element;

the radius of curvature of the concave side surface of the second gear element;

skew angle, glad; tooth length.

the design of the coupling will reduce the enos of the lateral surfaces of the teeth of the sleeve and the cage and reduce their load. This is achieved by performing the interacting lateral surfaces of the teeth of the cage and the bushings according to the claims, while the radii of curvature of these surfaces must ensure that the sleeve in the cage can be skewed within the specified skew angle

The distribution of the gaps between the teeth during misalignment and the condition of the location of the favorable contact area of the interacting surfaces when moving the sleeve tooth in the longitudinal direction along the tooth of the ring substantially depend on the curvature of the lateral surfaces of the teeth of the bushings and the holder. Rptimal e. boko

5

the outer surfaces of the teeth of the cage and bushings on the dividing circle in the cross-section tangent to the main cylinder provide a reduction in the spacing and magnitude of the contact stresses and, consequently, a reduction in the load on the teeth and their wear.

In the coupling made according to the formula, a change in the gap between the teeth of the sleeve and the holder will be observed both near the plane coordinated by the angles (0 °, 180 °, equal to As AX, and in the plane coordinated by the angles If - 90 °, 270, equal to

AS -uq. Moreover, the same sign.

Reducing and equalizing the discrepancy is provided by the convergence of the values of the gap variation of the eubu located in the zone of angles 0 °, 180 ° 0 and angles If 90 °, 270 °. Thus, the maximum ranoezapor, will be equal to the absolute value of the difference of the gaps, i.e. ft -AY) (Fig. 4).

The value of LD can be determined by the Formula

5

HELL - Rt - r (R, - g) (1)

 , r

i

a & Y by the formula

AY - Kr - R, - (Rt - R,) 1 - (p, (2)

where P, is the radius of curvature of the convex lateral surface of the tooth of the sleeve (holder);

5

g

radius of curvature of the bent - lateral surface of the euba cage (sleeve); d is the radius of the pitch circle of the gear coupling;

C) - the angle of bias. If 4X controllers, then there will be no miscellaneous discontinuities in the connection, the minimum load on all teeth x will be the same, which is possible at certain ratios R, Rj, OJ, which can be determined from formulas (1) and (2) under the condition & X ДУ „After the necessary transformations and simplifications, taking into account that for small skew angles C0 5th sindHO, a cos (i) -M, we obtain the value of R in the function R and (d

+ ЈiDlW. 1 4TT-COSUTJ

Given the length of the tooth of the sleeve bj and the permissible skew angle Q, the value R of the radius of curvature of the convex lateral surface of the tooth of the sleeve (sleeve) should be such as to exclude the contact of the surface of the teeth to the edge due to an increase in bending stresses or the contact in the middle of the tooth due to an increase in contact voltage

Based on the studies, the most favorable should be considered the location of the contact near the middle of the tooth at a distance

V-r

(3)

B

i "

In this way

80) 6R

 Dyg

The proposed coupling operates as follows.

When torque is transmitted from one shaft to another and if there is a skew angle between them, the sleeve 1 is connected to the drive shaft of the gear, the yoke 4 moves through the internal involute tooth 5, with which the involute barrel-shaped tooth 3 of the gear bushings 1 and 2 are in contact, and then through another gear sleeve 2 to the driven shaft,

During operation, the teeth of the clutch wear. However thanks

1633904

10

fifteen

twenty

the implementation of the flank surfaces of the tooth into the holders and bushings in the longitudinal direction is concave-convex, and, conversely, the convex-concave wear and load of the teeth can be reduced due to the alignment of the gap between the teeth and the favorable location of the contact area of the interacting surfaces when moving the tooth of the sleeve in longitudinal direction over tooth clips

. Improving the durability of the coupling is achieved by aligning and decreasing clearances and reducing the magnitude of contact stresses.

Claims (1)

The claims A gear clutch containing a cage with internal teeth and located, with it, in gear engagement of the sleeve with external involute teeth, the side surface of one of the gear elements being 25 the engagement is made convex in the longitudinal direction, characterized in that, in order to increase the durability by aligning the gaps and reducing contact stresses, the side surfaces of the teeth of the second gear element are concave in the longitudinal direction, while in the section tangent to the main the cylinder on the pitch circle, the radii of curvature of the concave and convex surfaces of the teeth of the first and second gear elements are determined from the relations thirty 35 40 R.R, fi; -isiw 1 (| A (l-cosO)) / 45 RO R CHU H where P | - radius of curvature of convex the tooth surfaces of the first gear element; radius of curvature of the concave side surface of the second gear element engaged SB neither; skew angle, glad; B is the length of the tooth. P5 Fig. 5 Editor T. Zubkov Compiled by I. Abramova Tehred D. Opinykh Proofreader S. Shevkui bb NYUKS Phage AT