JP3462529B2 - Roller type planetary transmission - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roller type planetary transmission. 2. Description of the Related Art A roller type planetary transmission is a device for driving a sun roller, a planetary roller and a ring roller to generate rolling conduction force by driving the sun roller, the planetary roller and the ring roller. After assembling, shrink-fit the ring roller, connect the ring roller to the output shaft and power is transmitted, but the connection part is at the back of the casing, and shrink-fit the ring roller to the sun roller and planetary roller, then the casing Since it is impossible to assemble the ring roller and the output shaft in the above, the ring roller is assembled on the output shaft portion, and then the ring roller is heated and the sun roller and the ring roller are assembled by shrink fitting. [0003] However, after assembling the output shaft and the ring roller to the casing, if the ring roller is heated and the sun roller and the planetary roller are assembled by shrink fitting, it is necessary to heat the ring roller in the casing. In addition, an oil bath furnace or the like cannot be used, and uniform heating is a problem. Further, since the shrink-fitting work is performed during the assembling, there is a problem in quality variation due to uncertainty of the assembling work and work safety. [0004] The present invention has been proposed in view of such circumstances, and shrink-fitting work of the sun roller, the planetary roller, and the ring roller can be performed outside the casing. It is an object of the present invention to provide a roller type planetary transmission in which the quality of assembly work and the safety of work are improved. [0005] For this purpose, the present invention provides a male spline provided on an outer peripheral portion of a disk fixed to an output shaft assembled to a casing, and a sun roller and a planetary roller. A female spline provided opposite to the male spline on the fitted ring roller, a circumferential groove provided on the female spline portion, and a spring having a notch and a radially expanding spring force are provided in the circumferential groove. A ring having an inner diameter larger than the outer diameter of the male spline inserted and a bolt attached to a screw hole leading from the outer peripheral portion of the ring roller to a circumferential groove and pressing the ring toward the center were provided. It is characterized by the following. In the roller type planetary transmission of the present invention, when the male spline of the disk is fitted into the female spline of the ring roller, the ring is set free in the circumferential groove of the ring roller, and The inner diameter of the larger than the outer diameter of the male spline of the disk, let through the male spline,
After inserting the male spline, press the ring toward the center with a bolt from the outer periphery of the ring roller to make the inner diameter of the ring smaller than the outer diameter of the male spline, and apply the force when the disk with the male spline comes out through the ring. The ring roller is received on the side surface of the circumferential groove, so that the disk and the ring roller are prevented from coming off in the axial direction after being connected. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment in which the roller type planetary transmission of the present invention is applied to a star type planetary reduction gear will be described with reference to the drawings. FIG. 1 is an overall vertical sectional view of a star type planetary reduction gear, FIG.
Is a cross-sectional view taken along the line II-II in FIG. 1, FIG. 3 is a front view of the ring roller, FIG. 4 is a front view of the ring, FIG. 5 is a detailed view of a V part in FIG. FIG. 7 is a view taken along the line VII-VII in FIG. In FIGS. 1 and 2, bearings 2 and 3 are assembled in a casing 1 and an output shaft 4 is rotatably supported. A carrier 5 and a cover 6 are assembled and fixed to the casing 1 with bolts 7. A disk 8 having a male spline 8 a on the outer periphery is assembled and fixed to the output shaft 4 with a knock pin 9 and a bolt 10. The input shaft 11 is rotatably supported by bearings 12 and 13 assembled to the cover 6, and is connected to the sun roller 14 by a spline 11b. A pin 15 is assembled on the carrier 5,
The planetary roller 18 is rotatably supported by bearings 16 and 17 assembled on the pin 15. Ring roller 19
Are shrink-fitted so as to be pressed against a plurality of equally arranged planetary rollers 18 around the sun roller 14. On one side of the ring roller 19, FIG.
As shown in FIG. 7, the female spline 19c and the circumferential groove 1
9d is provided, and a ring 20 having a circular section having a cut 20e and having a spring force expanding in a radial direction is inserted into the circumferential groove 19d. A plurality of screw holes 19f radially communicating from the outer peripheral portion of the ring roller 19 to the circumferential groove 19d are provided,
A bolt 21 is attached to each screw hole 19f. The casing 1 is provided with a working hole 1g for fastening the bolt 21 and a blind lid 22 is attached after the assembly is completed. In such an apparatus, as shown in FIGS. 5 to 7, the ring 20 inserted into the circumferential groove 19d is rotated by the spring force of the ring 20 when the bolt 21 is loosened. The ring 20 has an inner diameter dimension i equal to the outer diameter dimension j of the male spline 8a of the disk 8.
It is getting bigger. When the bolt 21 is tightened after inserting the male spline 8a of the disk 8 into the female spline 19c of the ring roller 19, the ring 20 is pressed toward the center and the inner diameter i of the ring 20 is reduced to the outer diameter of the male spline 8a of the disk 8. It becomes smaller than the dimension j, and when the disk 8 tries to separate from the ring roller 19, it hits the groove side surface 19h of the circumferential groove 19d via the ring 20 and acts so as not to come off. The assembling of such a device is performed by the casing 1
The male spline 8a of the disk 8 fixed to the output shaft 4 supported by the shaft 5 is mounted on the casing 1 by the planetary roller 18 supported by the carrier 5 and the female spline 19c of the ring roller 19 shrink-fitted by the sun roller 14. Insert in The ring 20 is inserted into the circumferential groove 19d in advance, and the bolt 21 is loosened so that the male spline 8a of the disk 8 can be inserted. After inserting the male spline 8 a of the disk 8 into the female spline 19 c of the ring roller 19, tighten the bolt 21 from the working hole 1 g of the casing 1 and press the ring 20 toward the center so that the disk 8 does not come out of the ring roller 19. To For disassembly, loosen the bolt 21 from the working hole 1 g of the casing 1,
Is spread over the entire inner diameter of the circumferential groove 19d so that the male spline 8a of the disc 8 passes therethrough, and the ring roller 19
Female spline 19c to the male spline 8 of the disc 8
a can be extracted. When the input shaft 11 rotates, the sun roller 14 connected by the spline 11b operates.
Rotates, and the pressed planetary roller 18 and ring roller 19 are driven. The ring roller 19 is connected to the output shaft 4 via the male spline 8a and the female spline 19c.
The output shaft 4 is connected to a disk 8 fixed to the output shaft 4. As a result, the power entering the input shaft 11 is reduced by the ratio of the sun roller diameter k to the ring roller diameter 1 and is output from the output shaft 4. Thus, according to this device, the casing 1
Can prevent the connection between the ring roller 19 and the disk 8 from coming off from the outside, so that the shrink-fitting work of the sun roller 14, the planetary roller 18 and the ring roller 19 can be performed outside the casing 1, and the assembly work Quality improvement and work safety are improved. In summary, according to the present invention, a male spline provided on an outer peripheral portion of a disk fixed to an output shaft assembled to a casing, and a sun roller and a planetary roller are shrink-fitted. The female spline provided on the ring roller in opposition to the male spline, the circumferential groove provided on the female spline portion, and a notch and a radially expanding spring force are inserted into the circumferential groove. By having a ring whose inner diameter is larger than the outer diameter of the male spline, and a bolt attached to a screw hole leading from the outer periphery of the ring roller to a circumferential groove and pressing the ring toward the center, Shrink fitting work of sun roller, planetary roller and ring roller can be performed outside the casing, improving the quality of assembly work and The present invention is extremely useful in industry because it provides a roller type planetary transmission with improved work safety.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an overall vertical sectional view of an embodiment in which a roller type planetary transmission according to the present invention is applied to a star type planetary reduction gear. FIG. 2 is a cross-sectional view taken along the line II-II of FIG. FIG. 3 is a front view of a ring roller. FIG. 4 is a front view of a ring. FIG. 5 is a detailed view of a portion V in FIG. 1; FIG. 6 is an explanatory diagram of a spline insertion procedure. FIG. 7 is a view taken in the direction of arrows VII-VII in FIG. 5; [Description of Signs] 1 Casing 1g Work hole 2, 3 Bearing 4 Output shaft 5 Carrier 6 Cover 7 Bolt 8 Disk 8a Male spline 9 Dowel pin 10 Bolt 11 Input shaft 11b Spline 12, 13 Bearing 14 Sun roller 15 Pin 16, 17 Bearing 18 Planetary roller 19 Ring roller 19c Female spline 19d Circular groove 19f Screw hole 19h Groove side 20 Ring 20e Cut 21 Bolt 22 Blind lid

──────────────────────────────────────────────────続 き Continuation of front page (56) References JP-A-62-37560 (JP, A) JP-A-58-170960 (JP, A) JP-A-53-122056 (JP, A) JP-A-4- 331822 (JP, A) JP-A-50-37959 (JP, A) JP-A-3-118 (JP, U) JP-A 5-1101 (JP, U) JP-A 4-56922 (JP, U) (58) Field surveyed (Int.Cl. ⁷ , DB name) F16H 13/00-15/56 F16B 21/00-21/20 F16D 1/00-9/00

Claims (1)

(57) [Claims 1] A male spline provided on an outer peripheral portion of a disk fixed to an output shaft assembled to a casing, and a ring shrink-fitted to a sun roller and a planetary roller. The female spline provided on the roller in opposition to the male spline, the circumferential groove provided on the female spline portion, and a notch and having a spring force that expands in a radial direction and are inserted into the circumferential groove to have an inner diameter. A ring whose size is larger than the outer diameter of the male spline, and a bolt which is attached to a screw hole leading from the outer periphery of the ring roller to a circumferential groove and presses the ring toward the center. Roller type planetary transmission.