SU929919A1 - Gearing - Google Patents

Description

(5) TRANSMISSION TIME

one

The invention relates to mechanical engineering and can be used in the design of gears.

Gears are known with the initial contour of the teeth, which is delineated by a composite line, including active arc and straight line segments, on which the instantaneous, tact lines 1 | are located.

The disadvantage of these gears is their insufficient load capacity due to the use in engagement of a portion of the active surfaces of the teeth.

The closest to the invention in terms of its technical essence and the effect achieved is a gear transfer with an initial tooth contour, a contoured composite line containing active arc and straight line sections, producing surfaces of which gesture | They are interconnected, piecewise congruent, and touching each other out with bent sections with zero total mixing of the initial derivatives of the producing wheels 2.

A disadvantage of the known gears is their insufficient load capacity due to the irrational use of the peripheral portions of the teeth.

The aim of the invention is to increase the load capacity of the transmission.

The goal is achieved by the fact that the teeth of the wheels are provided with out-pole sections, for example, straight lines on the leg and the head, located outside the hanger. pitch, the sum of the distances from an arbitrary normal to the pitch direct to the points of contact on the straight sections of the head and leg of the tooth is equal to the sum of the distances from the same normal to the points of contact on the convex and concave parts of the tooth.

Claims (1)

Fig 1 shows the original contour of the gear teeth with the proposed gearing; in fig. L - transmission in different phases of engagement of a gear wheel with a rack, end section, in FIG. 3 - wheels in different phases of engagement of one pair of teeth, end section .; The initial contour of the teeth of this transfer of the proposed engagement has an abcdefggfcdeb profile, delineated by a composite line including a convex ef (e) curve and straight fg (fg), tooth crown, concave cd (cd) curve and straight bc (bc) tooth legs, also transitional areas ab (ab) and de (de). The straight sections of be and g are made with the same profile angle. S, and at the same distance h from the dividing line (DP), they are so far from the axis of symmetry of the tooth that, moreover, e ,,, I is the distance from the theoretical contact points Kj LC2, K, |, Kd arc plot to the axis of symmetry of the tooth. The wheel with center C has a circle of apex of radius IV, an initial circle of radius t and a circumference of hollows of radius g. An involute link ay under the corner d passes through the engagement pole P and u is connected to the arc sections of QC at an angle to the initial end plane of the re plane ki NTOPR Tortsovye forming planes of the vertices (T.O.P.VR.R.) and depressions (T.O.P.Vpp.R.) Reiki limit the tooth. Involute wheels with the main circle radius rg, in engagement with the rack, gives an angle at oL 2 and the angle of inclination of the teeth. - ° The profiles of the mating teeth of the wheel 1 and the lath 2 are shown in engagement in three end sections .1-1, II-II, Section II and Ill-Ill give an idea of the simultaneous engagement of the convex-concave and peripheral involute sections, and the engagement pole (section II – II) has no contact for profiles, which characterizes extra pole engagement. With this line, the evolutive engagement has two working sections and. The work of this gear engagement is as follows. When the drive wheel rotates, the point of contact of a pair of teeth in some section of them moves the involute zone of engagement of the tooth shaft of the wheel and the tooth head of the slats, then at the end of the first phase of the eo-competitive gear the contact of the convex-concave profiles, the contact of the same wheel head profiles and the tooth legs coincides with the beginning of the second phase of the involute engagement, during the withdrawal of which the profiles come out of the engagement. Due to the axial overlap of the teeth at each instant of engagement, both involute and convex-shaped sections of the Profiles can be in contact at the same time. Claims of the invention Toothed transmission with the original contour of the teeth, outlined by a composite line containing active arc and straight sections, producing surfaces of which are rigidly connected to each other, piecewise congruent and touching each other in convex-concave portions with zero total displacement of the original production wheels, which, with increasing load, ruznochnoy method, the teeth of the wheels are equipped with non-polar areas, for example, straight on the leg and the head, located outside the direct pitch, the sum of distances from an arbitrary normal to the pitch straight to the points of contact on the straight sections of the head and leg of the tooth is equal to the sum distances from the same normal to the contact points on the convex and concave parts of the tooth. Sources of information taken into account in the examination 1. Author's certificate of the USSR, according to application number 2135589/28, cl. R Tb H 1/08. 19752. USSR Author's Certificate in Application No. 2052108 / 28j, cl. F 1b H 1/00, (prototype) ,.