RU2787798C1 - Internal cylindrical gear with a rotating wheel support on the outer diameter of the rim - Google Patents

Abstract

FIELD: mechanical engineering.

SUBSTANCE: invention relates to the field of mechanical engineering. Cylindrical internal gear, mounted in the housing, includes shafts with wheels with external teeth, which engage with the wheel with internal teeth. Shafts of wheels with external teeth are fixed relative to the body. A wheel with internal teeth does not have a shaft with a disk or spokes from the hub to the cylindrical rim, and the latter rests on the body with fixation in the axial direction through a radial rolling or sliding bearing, which ensures that the geometric axis of rotation of the wheel with internal teeth, which is the transmission link between the drive a wheel with an external arrangement of teeth and other wheels with an external arrangement of teeth, varying the number of which provides a certain gear ratio and speed.

EFFECT: output of the wheel shafts with external teeth fixed relative to the housing in the axial direction is provided in both directions from the plane of rotation.

1 cl, 2 dwg

Description

The invention relates to mechanical devices for transmitting motion using gears.

Known designs of internal spur gears, including a wheel with external teeth and a wheel with internal teeth, which allows you to maintain the same direction of rotation of the wheels. Also, this transmission has an increased load capacity due to a more favorable combination of tooth profiles of the contact surfaces. [1…9] However, the classical design of the internal gear transmission with the arrangement of gears on the shafts to provide geometric axes of rotation (Fig. 1) does not allow, if necessary, to locate the output end of the shaft of the wheel with external teeth on the side of the disk or spokes connecting (wiring ) a wheel shaft hub with internal teeth with a crown rim; also, the center distance is much smaller than the dimensions of a wheel with internal teeth.

Changing the design of the transmission to ensure the geometric axis of rotation of the wheel with internal teeth, excluding its shaft and carrying out the support of the wheel rim directly in the housing on a radial rolling or sliding bearing, with placement inside one more wheel with an external arrangement of teeth (or several wheels) included (s) into engagement with the internal teeth, allows you to output the output ends of the shafts in both directions (Fig. 2). With this solution, the wheel with internal teeth serves as a transmission link between the drive wheel with the outer teeth and other wheels with the outer teeth, varying the number of which provides a certain gear ratio and speed. A wheel with internal teeth is kept from displacement in the axial direction, for example, by a rolling bearing mounted on its rim, fixed in the gear housing, and with a plain bearing, by stops on both sides of the rim.

In FIG. 2 shows a view of the transmission design with the provision of a geometric axis of rotation of a wheel with internal teeth, the exclusion of its shaft and the implementation of the wheel rim support directly in the housing on a radial plain bearing, with two wheels inside fixed in the axial direction on the shafts with an external arrangement of teeth engaged with internal teeth, which allows you to output the output ends of the shafts in both directions. The transmission includes a housing 1 with supports of the wheel shaft 3 fixed in the axial direction with external teeth (drive) and the wheel shaft 4 with external teeth (driven) and a rim support of the rotating wheel 2 with internal teeth, a support sleeve 5 (pressed into the bored cylindrical hole of the housing 1 ) sliding bearing of the wheel rim 2 with internal teeth and limiters 6 of the axial shift of the wheel 2 with internal teeth in the form of flat washers fixed in the housing. Oil is placed in the lower part of the housing to lubricate the engagement and plain bearing.

When the drive wheel 3 with external teeth rotates, the wheel 2 with internal teeth is set in motion, which transmits the movement to the driven wheel 4 with external teeth. The geometric axis of rotation of the wheel 2 with internal teeth is ensured by the installation of its rim in the housing 1 on the support sleeve 5 of the plain bearing, and the exclusion of the disk and shaft (Fig. 1, pos. 4 and pos. 5) makes it possible to place the output ends of the shafts of the drive wheel 3 with outer teeth and driven wheel 4 with outer teeth on both sides of the body 1. The passage of the wheel rim 2 with inner teeth through the oil bath provides a continuous supply of liquid lubricant to both the pairs of engagement and to the plain bearing over the entire mating area, which ensures guaranteed oil separation contact surfaces and reduce friction losses. [10]

Designs of a cylindrical gear with internal gearing, providing a geometric axis of rotation of a wheel with internal teeth, excluding its shaft and supporting the wheel rim directly in the housing on a radial rolling or sliding bearing, with placement inside on wheels fixed in the axial direction with an external arrangement of teeth engaged with internal teeth, allows you to output the output ends of the shafts in both directions from the plane of rotation.

Sources of information

1. Atlas of machine parts. Transfers. Ed. prof. B.P. Dashkevich. - Kyiv: Gosud. ed. technical lit. Ukrainian SSR, 1958. - 232 p., ill.

2. M.I. Anfimov Reducers. Designs and calculation. Album. - M: Mashinostroenie, 1965. - 288 p., ill.

3. GOST 19274-73 Gears cylindrical involute internal gearing. Geometry calculation.

4. Machine parts: Atlas of designs. Ed. Dr. tech. sciences, prof. D.N. Reshetov. - M.: Mashinostroenie, 1979. - 367 p., ill.

5. Ivanov M.N. Machine parts. - M.: Higher School, 1984. - 335 p., ill.

6. Tsekhnovich L.I., Petrichenko I.P. Atlas of gearbox designs. - Kyiv, High school, 1990. - 151 p., ill.

7. Machine parts: Atlas of designs. In 2 parts. Part 1. Under the general. ed. Dr. tech. sciences, prof. D.N. Reshetov. - M.: Mashinostroenie, 1992. - 352 p., ill.

8. Moroz S.F., Peremyschev D.A. Gear and worm gears. Atlas of structures. - M.: ed. MPEI, 2000. - 114 p., ill.

9. K.P. Zhukov, Yu.E. Gurevich Atlas of designs of mechanisms, components, and machine parts. Part 1. - M .: Ministry of Education of the Russian Federation, MSTU "Stankin", 2000. - 143 p., ill.

10. Voskresensky V.A., Dyakov V.I. Calculation and design of sliding bearings (liquid lubrication): Handbook. - M.: Mashinostroenie, 1980. - 224 p., ill. (B-ka designer).

Claims (1)

Cylindrical gear with internal gearing, mounted in a housing, including shafts with wheels with external teeth, which engage with a wheel with internal teeth, characterized in that, in order to ensure the output of the shafts of the wheels with external teeth fixed relative to the housing in the axial direction in both sides from the plane of rotation, a shaft with a disk or spokes from the hub to the cylindrical rim is excluded from the wheel with internal teeth, and the latter rests on the body with fixation in the axial direction through a radial rolling or sliding bearing, which ensures the preservation of the geometric axis of rotation of the wheel with internal teeth, which is a transmission link between a driving wheel with an external arrangement of teeth and other wheels with an external arrangement of teeth, by varying the number of which a certain gear ratio and rotational speed is obtained.

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