JPS6124756Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a gear used in a press, particularly a gear in which a gear portion and a boss portion are separated.

Conventionally, this type of gear a, in which the gear part and the boss part are separated, is used between the drive pinion c and the main gear d of the clutch/brake shaft b of a press, as shown in Fig. The gear part and the boss part are separated to match the phase of the gear d.

For example, as shown in FIGS. 2 and 3, it is divided into a boss part f fixed to the shaft e, and a gear part i consisting of a ring gear g and a web h.
and bolt k after phase adjustment.
The structure is such that the web h and the boss part f are tightened and fixed.

However, with this structure, the circumferential speed of the ring gear g is very high, so that a large amount of noise is generated during press operation.

In other words, gear a is radially constrained by drive pinion c and shaft e at the part where it meshes with drive pinion c, but it is not constrained in the radial direction outside of the meshing part, so gear a is compressed in the radial direction at the meshing part. , the other parts will extend in the radial direction, so when gear a rotates at high speed, gear a will vibrate in the radial direction, causing the radial abutment part of boss part f and gear part i to collide. Make repeated noises.

The present invention was developed in view of the above circumstances, and its purpose is to describe an embodiment of the present invention with reference to a gear that quickly damps vibration energy when the gears of a ring gear mesh to reduce noise generation. explain.

Embodiments of the present invention will be described below with reference to FIG. 4 and subsequent figures.

Gear A is divided into a boss portion 1 and a gear portion 2, and boss portion 1 has a shape in which a flange 5 is formed integrally with a boss 4 which is fitted onto a shaft 3.

The gear portion 2 has a shape in which an annular web 7 is integrally formed on the inner circumferential wall of the ring gear 6 at an intermediate position in the width direction.

An annular attachment body 8 is attached to one end surface 7a of the web 7.
is tightened and fixed with bolts 9, and an annular groove 10 is formed in the outer peripheral surface 8a of the mounting body 8, and an annular rubber body 11 is fitted and attached to the groove 10. The rubber body 11 is in contact with the inner peripheral wall 6a of the ring gear 6.

An annular step portion 1 is provided on one end surface 5a of the flange 5.
2 is formed, and the web 7 is attached to the annular stepped portion 12 thereof.
are fitted and fixed with bolts 13, and an annular groove 14 is formed on the outer peripheral surface 5b of the flange 5, and an annular rubber body 15 is fitted into the groove 14. The rubber body 15 is in contact with the ring gear inner circumferential wall 6a.

Further, a notch 16 is formed in the flange 5,
The other end surface 7b of the web 7 facing the notch 16
is provided with an adjustment bolt 18, and both end surfaces 18a, 18a of the adjustment bolt 18 are connected to the notch end wall 16.
a, 16a.

Therefore, when the gears are engaged, a load acts on the ring gear 6, causing it to vibrate.

Since this vibrational energy is converted into thermal energy by the rubber bodies 11 and 15, noise generation is reduced.

Further, if a rubber sheet 20 is provided between the mounting surfaces of the mounting body 8 and the web 7 as shown in FIG. 6, the sound is attenuated quickly, so that the noise can be further reduced.

The present invention is as described above, and the problem occurs when the part of the ring gear 6 of the gear part 2 that meshes with other gears is restrained in the radial direction and compressed in the radial direction, and the remaining part is not restrained. Vibrations in the radial direction are quickly attenuated by the rubber bodies 15 and 11 that abut on both sides of the web 7 on the inner circumferential wall 6a of the ring gear 6, so that noise generation can be reduced.

Further, since the web 7 and the flange 5 can be rotationally displaced relative to each other in the circumferential direction by the adjusting bolt 18, the phase of the boss portion 1 and the gear portion 2 can be adjusted by rotationally displacing the boss portion 1 and the gear portion 2 in the circumferential direction.

Further, since the gear part 2 and the boss part 1 are connected to the flange 5 and the web 7 by bolts 13, the torque transmission between the boss part 1 and the gear part 2 is carried out by the bolts 13.
3, the torque is not transmitted to the rubber bodies 15, 11, and the rubber bodies 15,
11 will not wear out prematurely.

[Brief explanation of the drawing]

Fig. 1 is a schematic explanatory diagram of the press drive mechanism, Fig. 2 is a sectional view of a conventional example, Fig. 3 is a front view, Fig. 4 is a sectional view showing an embodiment of the present invention, Fig. 5 is a front view, FIG. 6 is a sectional view of another embodiment. 1 is a boss portion, 2 is a gear portion, 4 is a boss, 5 is a flange, 6 is a ring gear, 7 is a web, 8 is a mounting body, 9 is a bolt, 11 and 15 are rubber bodies, and 20 is a rubber sheet.

Claims (1)

[Scope of utility model registration request] A flange 5 is integrally formed on the boss 4 to form a boss portion 1, an annular web 7 is integrally formed at the widthwise center portion of the inner peripheral wall 6a of the ring gear 6 to form the gear portion 2, and an outer peripheral surface 5b of the flange 5 is formed. to the inner circumferential wall 6a of the ring gear 6 via the annular rubber body 15.
The other end surface 7b of the web 7 and the one end surface 5a of the flange 5 are fitted together on the other side in the width direction of the bolt 1.
3, and both end surfaces 18a, 18a of the adjustment bolt 18 supported in the circumferential direction on the other end surface 7b of the web 7, and the notch facing walls 16a, 16a of the notch 16 formed in the flange 5. The outer circumferential surface 8a of the annular attachment body 8 which abuts and is fixed to one side end surface 7a of the web 7 is fitted and attached to one side in the width direction of the inner circumferential wall 6a of the ring gear 6 via the annular rubber body 11. A gear characterized by: