JPH0610211Y2 - Fastening device for shaft and housing - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to, for example, an intermittent drive device having an input shaft and an output shaft,
The present invention relates to a fastening device for a shaft and a housing in a speed reducer or the like.

(Prior Art) As a fastening device for an input shaft and a housing in a conventional intermittent drive device in which an input shaft and an output shaft are arranged orthogonally, there is, for example, Japanese Utility Model Laid-Open No. 56-62419. In this product, the fastening of the input shaft and the housing is provided near the inner end of the eccentric flange in the axial direction, with a stop flange portion protruding radially from the outer peripheral surface of the eccentric flange, and inward and outward in the axial direction of the inner peripheral surface of the eccentric flange. Each part is composed of a smooth peripheral surface and a female screw portion, and a bearing is fitted between the smooth peripheral surface and the shaft, while a tightening ring having a male screw portion on the outer periphery is screwed between the female screw portion and the input shaft. The bearing is pushed in and fixed at a predetermined position in the axial direction by a tightening ring when it is screwed in, and the stop flange portion is pressed against the inner wall surface of the housing facing by the reaction force generated by the pushing.

(Problems to be solved by the invention) However, as in the above-mentioned conventional device, a device in which a stop flange is provided on the inner end side of the eccentric flange so as to be brought into pressure contact with the inner wall surface of the housing opposite to the device is Is very troublesome and it is difficult to firmly fasten the eccentric flange to the housing.Therefore, a set bolt to be pressed from the bottom of the housing toward the outer peripheral surface of the eccentric flange is not provided outside the fastening means. However, there is a problem in that the eccentric flange must be fixed by the provision.

That is, when assembling the above-mentioned conventional device, when the eccentric flange is inserted into the housing through the hole on the input shaft mounting side, the stopper flange interferes and cannot be inserted. Therefore, the eccentric flange has a large hole diameter. Insert into the housing from the hole on the output shaft mounting side, fit this into the hole on the input shaft mounting side, and also insert the input cam (roller cam) into the housing from the hole on the output shaft mounting side, With the shaft hole of the input cam aligned with the hole of the eccentric flange, the input shaft is inserted from outside the housing to penetrate the shaft hole of the input cam, and in this state, inside the hole of the eccentric flange. The conical roller bearing and the tightening ring were inserted in the assembly. Therefore, since all of these operations are performed in a narrow housing, there is a problem that only an expert can perform the operations quickly and accurately, and the fastening of the eccentric flange to the housing is performed by the fastening ring. In addition to the pressure contact force between the stop flange portion and the opposing inner wall surface of the housing due to the reaction force generated by the pushing, the fastening force of the set bolt pressed against the outer peripheral surface of the eccentric flange from the bottom portion of the housing does not depend on the housing. There is a problem in that the eccentric flange cannot be securely fastened.

The present invention solves the above-mentioned problems, and enables the eccentric ring to be fastened to the housing firmly by the fastening force by the pressure contact force with the retaining ring body provided in the input shaft mounting hole of the housing and the assembly work of the device. It is an object of the present invention to provide a fastening device for a shaft and a housing that can be easily and quickly performed.

(Means for Solving Problems) In order to solve the above problems, the present invention provides a fastening device for a shaft and a housing in a drive device having an input shaft and an output shaft, in which conical roller bearings are provided at both ends of the input shaft. Mounting, fitting an eccentric ring on the outer circumference of the conical roller bearing, and pressing the conical roller bearing inward in the axial direction and outwardly in the axial direction, and a bearing retainer in the eccentric ring. It is screwed and mounted, and the eccentric ring is axially circumferentially slidably inserted into holes formed in both side walls of the housing and slidably in the axial direction, and is located on the outer surface side of the eccentric ring. A retaining ring body that comes into contact with the outer peripheral side surface portion of the eccentric ring is provided inside the portion.

(Operation) When the eccentric rings 7, 7 are fastened to the housing 1, the input cam 5 having the shaft hole 5a attached to the input shaft 4 in advance is provided on the side walls 3 and 3 of the housing 1 for the input shaft mounting hole 2. , 2 into the housing 1 from one side (right side in FIG. 1), and then insert the eccentric rings 7 and 7 into the input shaft mounting holes 2 and 2, respectively, and further insert the input shaft mounting holes. The retaining ring bodies 11 and 11 are inserted and mounted in the second and second conical roller bearings 6 and 7 in the eccentric rings 7 and 7.
6 and bearing retainers 12 and 12 are attached to the bearing retainer 1
By tightening 2, 12, the conical roller bearing 6,
6 is pushed inward in the axial direction to bring its inner end surface into contact with the stopper flange portions 13, 13 of the input shaft 4, while the outer peripheral outer surface portions 8a, 8a of the eccentric rings 7, 7 are connected to the input shaft mounting hole portion. Outer peripheral inner side surface portion 1 of the retaining ring bodies 11, 11 in 2, 2
The eccentric rings 7 and 7 are fastened to the housing 1 by press-contacting with the housings 1a and 11a, respectively.

The input shaft 4 with the input cam 5 attached and the turret 15
The adjustment of the distance between the output shafts 14 mounted with or the position of the input shaft 4 with respect to the housing 1, etc.
2 is slightly loosened, the eccentric rings 7 and 7 are appropriately rotated to determine the position, and the bearing retainers 12 and 12 are fastened and fixed again, and the bearing retainers 12 and 12 are also fixed. The conical roller bearings 6 and 6 are positioned with respect to the input shaft 4 by the tightening force.

(Embodiment) FIGS. 1 to 4 show one embodiment of the present invention. FIG. 1 is a vertical sectional front view, FIG. 2 is a right side view with a cutaway portion of the same portion, and FIG. 3 is a plan view of the same. The drawing is a partially longitudinal front view of another embodiment.

Reference numeral 1 denotes a housing of the intermittent drive device, 2 and 2 denote input shaft mounting holes formed in both side wall portions 3 and 3 of the housing 1, 4
Is an input shaft, and 5 is an input cam, which is an appropriate one such as a roller gear cam. Reference numeral 5a is a shaft hole portion, 6 and 6 are conical roller bearings attached to the input shaft, 7 and 7 are eccentric rings fitted to the outer circumferences of the conical roller bearings 6 and 6, and outer surface portions 8, 8 has bosses 9 and 9 at the center thereof, and a predetermined number of eccentric inter-axle adjusting rotation tool insertion holes are formed at predetermined intervals on the circumference of the required dimension of the outer side surfaces 8 and 8 around the bosses 9 and 9. 10 and 10 are provided. Reference numerals 11 and 11 denote snap ring bodies provided by being fitted into the annular grooves 2a, 2a in the input shaft mounting hole portions 2, 2.
The eccentric ring 7,
The outer peripheral outer surface portions 8a, 8a of 7 are brought into contact with each other. Reference numerals 12 and 12 denote bearing retainers, in which male screw portions 12a, 12a partially provided on an outer peripheral surface are screwed to female screw portions 7a, 7a provided on a partial inner peripheral surface of the eccentric ring 7, 7. The conical roller bearings 6, 6 are pushed inward in the axial direction to abut against the stopper flange portions 13, 13 of the input shaft 4, while the eccentric rings 7, 7 can be pushed outward in the axial direction. There is. Note that FIG. 4 shows another embodiment, in which the outer peripheral outer surface portions 8a, 8a of the eccentric rings 7, 7 are formed in a protruding shape. Reference numeral 14 is an output shaft, 15 is a turret, 16 is a cam floor, 17 is an oil seal, 18 is a setup bolt hole, and 19 is a bearing pressing tool insertion hole.

(Effect) As described above, according to the present invention, in a fastening device for a shaft and a housing in a drive device having an input shaft and an output shaft, conical roller bearings are attached to both ends of the input shaft, and An eccentric ring is fitted on the outer circumference, and the conical roller bearing can be pressed inward in the axial direction and the eccentric ring can be pressed in the axial outward direction. The ring is inserted into holes formed in both side walls of the housing so as to rotate in the axial direction and slidably in the axial direction, and is located on the outer surface side of the eccentric ring. Since a retaining ring that comes into contact with the surface is provided, the input cam, conical roller bearing, bearing retainer, eccentric ring, etc. must be attached to the input shaft in advance when assembling the device. , By easily inserting this into the housing through the input shaft mounting hole, fitting the retaining ring into the input shaft mounting hole, and then tightening the bearing retainer in the eccentric ring to outer circumference of the eccentric ring. Since the input shaft can be fastened to the housing by press-contacting the outer side surface with the outer peripheral inner side surface of the snap ring body, it is not necessary to perform the assembly work in a narrow housing unlike the conventional device. Therefore, even an unskilled person can perform the work quickly and accurately, and there is no need to press the stop flange projecting on the inner end side of the eccentric flange against the opposing inner wall surface of the housing. The input shaft mounting hole can be made quite large without increasing the size,
As a result, there are various effects such that a cam having a larger diameter than that of the housing can be easily inserted into the housing through the input shaft mounting hole.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention. FIG. 1 is a vertical sectional front view, FIG. 2 is a right side view with a cutaway portion of the same portion, and FIG.
FIG. 4 is a partially longitudinal front view of another embodiment. 1 ... Housing, 2 ... Input shaft mounting hole, 3 ... Both side walls, 4 ... Input shaft, 5 ... Input cam, 6 ... Conical roller bearing, 7 ... Eccentric ring, 8 ... ... Outer peripheral outer surface portion, 9
...... Boss part, 10 ...... Eccentric axis adjustment, positive rotation tool insertion hole, 1
1 ... Retaining ring body, 12 ... Bearing retainer, 13 ... Stopper collar part, 14 ... Output shaft, 15 ... Turret, 16 ...
Cam floor.

Claims (1)

[Scope of utility model registration request] In a fastening device for a shaft and a housing in a drive device having an input shaft and an output shaft, conical roller bearings are attached to both ends of the input shaft, and an eccentric ring is fitted to the outer periphery of the conical roller bearing. The conical roller bearing can be pressed inward in the axial direction, and the eccentric ring can be pressed outward in the axial direction.
Further, the eccentric ring is fitted in a hole formed in both side walls of the housing so as to rotate in the axial direction and slidably in the axial direction, and is located on the outer surface side of the eccentric ring in the housing hole. A fastening device for a shaft and a housing, which is provided with a retaining ring body that abuts an outer peripheral side surface portion of the shaft.