JPS6123967Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention is a cam device, more specifically a device using parallel cams, that is, a pair of plate cams attached to a cam shaft, and a plurality of rollers rotatably supported between turret discs. The present invention relates to an improvement of a cam device that acts on a cam device to intermittently rotate a turret shaft.

Conventionally, in a cam device using a parallel cam, the turret shaft serves as the output shaft, and therefore an external transmission device is required to increase or decrease the output rotation. Further, this type of cam device usually has one output shaft, and when two output shafts are rotationally driven, an external transmission is required as described above.

This invention aims to improve the defects of the cam device using parallel cams as described above, and its purpose is to drive two output shafts with one input shaft, increasing and decelerating the rotation by the parallel cam. The rotation angle of one output shaft can be set over a wide range, while the other output shaft rotates at a constant speed and synchronizes with the cam timing, allowing the rotation ratio to be set freely.Especially for conveyance that requires synchronous rotation. An object of the present invention is to provide a cam device whose mechanical configuration can be greatly simplified when incorporated into the device.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

In FIGS. 1 and 2, an input shaft 2 is rotatably supported between one opposing side wall 1a and 1b of a case 1, and a pinion gear 3 is fixed to an intermediate portion of the input shaft 2. . The pinion gear 3 meshes with a worm gear 5 of a first output shaft 4, and this output shaft 4 is rotatably supported between the other opposing side walls 1c-1d of the case 1, with one end protruding outward. ing. A first gear 6 is further fixed to this first output shaft 4, and this gear 6 meshes with a large-diameter gear 8 fixed to a camshaft 7, so as to be rotatable between side walls 1c and 1d of the case. The supported camshaft 7 is rotated. A pair of plate cams 9 and 10, called parallel cams, are fixed to the camshaft 7 in parallel. Each plate cam has circular arc portions 9a, 10a
and curved portions 9b, 10b protruding outward, and the curved portions of both plate cams 9, 10 are attached with their phases shifted from each other. This plate cam 9,10
Three turret disks 11a-11c adjacent to
are integrally provided on the turret shaft 12 at intervals from each other. Three rollers 13 are rotatably supported on the turret disks between adjacent turret disks, that is, between 11a and 11b and between 11b and 11c, and these three rollers 13 are arranged at equal intervals on the same circumference. A total of six rollers 13 are arranged in a circular row of rollers when viewed on the same plane as shown in FIG. Although six rollers are used in this embodiment, it goes without saying that this number is not limited to this. The curved portions 9b, 1 of the plate cams 9, 10 are located between the turret discs.
0b enters during rotation, and the turret disc 11a-
11c is configured to rotate around its turret shaft 12. Turret disk 11
The outer diameters of a-11c are all the same, and a gear 14 is formed on the outer periphery of the a-11c, and this gear 14 meshes with the gear 16 of the second output shaft 15. This output shaft is rotatably supported between the side walls 1d and 1e of the case 1, and one end thereof projects outward on the same side as the first output shaft 4.

Describing the operation of the cam device having the above configuration, first, the rotation of the input shaft 2 is transmitted to the first output shaft 4 as constant velocity rotation at a reduced speed through the meshing of the pinion gear 3 and the worm gear 5. The rotation of the output shaft 4 is transmitted as rotation of the camshaft which is further reduced in speed by the gear 6 attached thereto meshing with the large-diameter gear 8 of the camshaft 7. As the camshaft 7 rotates, parallel cams, that is, a pair of plate cams 9 and 10 rotate. Each plate cam contacts the roller 13 between the turret disks 11a-11c and rotates, but when the arc portions 9a and 10a of the plate cam come into contact with the roller, the roller simply rotates and the turret shaft 12 does not rotate. However, when the curved portions 9b and 10b of at least one of the cam plates protruding outward from the arc portion come into contact with the roller 13, the contact portions of the two cam plates both become arc portions. The turret shaft 12 is rotated intermittently. When the turret shaft rotates, the turret disc 11a-1 is integrally attached to the turret shaft.
Since the outer peripheral portion of 1c meshes with the gear 16, the second output shaft 15 is intermittently rotationally driven. At this time, the rotation of the turret shaft 12 is increased/decelerated by appropriately selecting the gear ratio of the gear 16 of the turret disc and the gear 16 of the second output shaft 15 that meshes with the gear 16 of the second output shaft 15. rotation can be obtained. At this time, for example, if speeding up, it is possible to divide into a small number, such as one stop per two rotations, and if speeding up, it is possible to increase the number of stops. Note that the rotational direction of the second output shaft 15 at this time is opposite to that of the first output shaft 4.

As described above, the cam device of the present invention has two output shafts: the first output shaft 4 that rotates at a constant speed, and the second output shaft 15 that rotates intermittently including constant speed rotation and non-uniform speed rotation. Therefore, by appropriately designing the gears used for internal rotation transmission, it is possible to obtain synchronized rotation of the two output shafts, especially when work is performed during synchronous rotation, without stopping the work. Work can be done and time loss is reduced.

In addition, as mentioned above, the gear 16 of the turret disk
In addition, by appropriately designing the gear ratio of the gear 16 of the second output shaft that meshes with the second output shaft, it is possible to easily speed up or decelerate the rotation of the second output shaft. Although there is a certain limit on the number of stops in the device, by increasing the speed with the cam device of the present invention, it is possible to perform small divisions such as 0.5 stops that have a stop section after two rotations. If a gear or the like is attached to the output shaft of the machine and a chain or the like is used to convert it to linear feed, it becomes possible to set a large feed amount. Furthermore, if the speed is reduced, multiple divisions can be designed.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional front view of the cam device according to the present invention;
Figure 2 is a sectional view taken along the - line in Figure 1;
The figure is a partial cross-sectional view showing a parallel cam mechanism used in this device, and FIG. 4 is a cross-sectional view taken along the - line in FIG. 3. 1... Case, 2... Input shaft, 3... Pinion gear, 4... First output shaft, 5... Worm gear, 6, 8, 16... Gear, 7... Camshaft, 9,
10... Plate cam, 11... Turret disk, 12
...Turret shaft, 13...Roller, 15...
Second output shaft.

Claims (1)

[Scope of utility model registration request] The input shaft is connected to the first
is drive-coupled with the output shaft of the first
The first output shaft is connected to rotate a camshaft via a pair of gears, and a pair of plate cams are attached to the camshaft, so that each cam rotates at a constant speed. The plate is formed of a circular arc portion and a curved portion, and acts on a plurality of rollers rotatably supported between the turret disks to intermittently rotate the turret shaft, and the turret disk is connected to a gear formed on its outer periphery. portion meshes with the gear of the second output shaft to generate the second output shaft.
A cam device characterized by intermittent rotation of an output shaft.