SU1252574A1 - Chain gearing - Google Patents

Description

The invention relates to mechanical engineering and can be used in self-propelled vehicle drives during the transmission of torque between non-parallel shafts.

The purpose of the invention is to increase reliability and reduce transmission dimensions by installing the second po.iMiKOD chain on the axles in the additional eyes of the links and making the redline portion of the guide for each branch of the chain in the form of a barrel-shaped roller, one of the trunnions of which is kinematically connected to the drive unit.

FIG. 1 shows a chain drive, a plan; FIG. 2 shows section A-A in FIG. 1, FIG. 3 is a section bb of FIG. 1, in FIG. 4 - section bb in

and 6 is a portion of the Chain in FIG. 7 - section

FIG. one

in D P at l

in fig. 5 projects; YY in FIG. five.

The chain transmission contains a set of 1 stars on shafts 1 and 2 asterisks 3,

chain 4 is assembled, inter alia, and with radii r and r

in which there are 5 guides fastened in the housing, consisting of straight 6 and curvilinear 7 sections adjoining each other. The curvilinear portion 7 of the direction of each branch of the chain is shaped as a forming surface of a barrel-shaped roller 8 mounted on pins 9 in body 5 and having oval cross-sections between the ends, and the latter are described by circles drawn from the center of rotation of the roller. Balls 1 and 2 can be connected to gearboxes 10 and 11 with a clutch (not shown).

Chain 4 (Figs. 1.5, 6 and 7) consists of stamped links 12 and 13, rollers 14, sleeves 15 connected by axes 16 and 17 (Fig. 7).

On the end side of the roller 8, a worm wheel 18 is mounted on the pin 9. Each worm wheel is in engagement with the screw 19 (Figs. 1 and 3). The forming surfaces of each barrel-shaped roller are described by a radius R coupled to the guides of the housing 5 (Fig. 1). At the same time, the surface of roller 8 in the end parts is barrel-shaped circular, and on the rest between the ends, barrel-shaped elliptical. On

35

data from centers 0. and 0 of the Goy Lobe half of the helix-shaped surface (FIG.

On curvilinear sections 30 in Case 5, 20 are mounted (figure 4) for each pi 4.

Chain transfer work way.

First, chain 4 is tensioned by roller-shaped rollers 8 for the time of turning the worm in engagement with the wheels 18, each rigidly fixed to the trunnion barrel-shaped p this on the curvilinear part (figure 1) should be placed the number of steps of chain 4 for both stable tension.

Then, from the gearbox 10, with the engine (not showing the clutch, the rotating shaft is transmitted to one of the stars through the elements of the chain rollers 8, the steep shaft is transmitted to the other stars connected to the shafts, like a self-propelled tailor, via p

40

45

50

1252574J

 one share half roller 8

(Fig. 4) the length of the major axis in the plane of symmetry of the roller is equal to D — the largest diameter of the roller with a side 5 surface of a circular barrel-shaped roller (in Fig. 4, the side surface of such a roller is shown in thin lines x), and the small axis is smaller than large by the amount C, equal to the total of 10 items manufacturing tolerance

chain in step. I

On the other share half of the roller 8 (FIG. 4), the length of the minor axis in the plane of symmetry is D - the largest diameter of the roller, and the larger axis is larger than the minor axis by an amount C equal to the total manufacturing tolerance of the chain elements in a pitch.

The lateral surfaces of the middle and end parts of the roller 8 are conjugated with radii r and K drawn from the centers O, and 0,, j for one share half of the elliptical barrels on the surface, and radii r and R

one

drawn from the centers of 0. and 0, for the other Lobar half of the elliptical barrel-shaped surface (FIG. 3).

On curvilinear sections (Fig. 1) in Case 5, guides 20 are mounted (Fig. 4) for each branch of chain 4.

Chain transmission works as follows.

At first, chain 4 is pulled by barrel-shaped rollers 8 due to their simultaneous rotation of the screw 19, which is engaged with the screw wheels 18, each of which is rigidly fixed on the pin of the corresponding barrel-shaped roller. In this case, an integral number of steps of chain 4 should be placed on the curved portion of the body (Fig. 1) to ensure its stable tension.

Then, from the gearbox 10 connected to the engine (not shown), the torque is transmitted through the clutch to one of the sprockets 3, from which through the elements of the chain 4 and the barrel-shaped rollers 8 the torque is transmitted to another sprocket 3 connected to the shafts, for example, rollers of tracked self-propelled vehicles through gears 11.

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Editor A. Shandor

Compiled by O. Klimov Tehred O. Gortvay

Order 4609/39 Circulation 880

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Production and printing company, Uzhgorod, st. Project, 4

Proofreader V. Sinitska

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Claims (3)

1. A chain drive comprising a case, a leading and a driven sprocket, a double-hinged chain spanning the asterisks, having links with eyelets, axles and rollers mounted on them, some of which interact with teeth of sprockets, guide branches of the chain, including each straight and associated curvilinear sections interacting with second rollers, characterized in that, in order to increase reliability and reduce size, chain links have additional eyelets with holes and axes fixed in them, second rollers mounted on them and made barrel-shaped, the curvilinear section of each rail is a barrel-shaped roller mounted on trunnions in the housing and having oval cross-sections between ortsa- <E c, and the latter describes a circle drawn from the center of rotation of the roller. 2. Transmission according to Claim. ^ Characterized in that one of the trunnions of each barrel-shaped roller is kinematically connected with a driving device. 5 C, „. 1252574 > 1252574 2