JPH04315541A - High performance woodworking tool - Google Patents

Abstract

PURPOSE:To provide a high performance woodworking tool which performs eminent saving of energy through amplification of an input. CONSTITUTION:In a woodworking tool, a rotation boosting device coupled to an electric motor is formed such that a large eccentric boosting drive gear 22 is engaged with a small drive gear 21 driven by means of an input shaft 15b. By coupling the eccentric boosting drive gear to a planetary gear 28 being smaller than the eccentric boosting drive gear and having a wheel and axle relation therebetween, torque of the drive gear is amplified to transmit it to the planetary gear, and an amplified output is fetched from the output side of a planetary mechanism functioning as a driven part.

Description

[Detailed description of the invention]

0001

FIELD OF THE INVENTION This invention relates to woodworking machines, and more particularly to high performance woodworking machines.

0002

BACKGROUND OF THE INVENTION Conventional woodworking machines were inefficient and consumed a lot of energy.

0003

SUMMARY OF THE INVENTION An object of the present invention is to provide an energy-saving, high-performance woodworking machine.

0004

[Means for Solving the Problems] A woodworking machine of the present invention has an electric motor and a rotary booster, and the rotary booster includes a drive section provided with a rotary boost drive mechanism, and is driven by the drive section. The rotational boost drive mechanism includes a small-diameter drive gear, and a large-diameter eccentric that engages with the drive gear and revolves around the axis of the driven part while rotating on its own axis. a booster drive gear; the planetary mechanism includes a sun gear coaxial with the drive gear; an internal gear having a larger diameter than the sun gear; and an internal gear having a smaller diameter than the eccentric booster drive gear and integral with the sun gear in a wheel axle relationship. It is characterized by being equipped with a planetary gear that rotates cyclically.

[0005]

[Operation] In the woodworking machine of this invention, the rotary booster
The input torque transmitted to the small-diameter drive gear is amplified via an eccentric booster drive gear with a larger diameter than the drive gear, and this amplified torque is transmitted to the eccentric booster drive gear and the planetary gear related to the wheel axle. The increased output is transmitted to the driven part.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the woodworking machine according to the present invention will be described below with reference to the drawings. In Figure 1,
The woodworking machine 10 includes a woodworking machine main body 13 having a main shaft 13a connected to a transmission 11, and a belt 11a connected to the transmission 11.
It includes a rotary booster 15 connected by a transmission means such as the like, and an electric motor 17 that drives the same. In FIG. 2, the rotary booster 15 is housed in a casing 15a, and is connected to a rotary booster drive mechanism 19 that functions as a drive unit and arranged on the same axis, and to this rotary booster drive mechanism 19,
The planetary mechanism 20 functions as a driven part.

[0007] The rotation booster drive mechanism 19 has a casing 15a.
a drive gear 21 rotatably supported by the motor 17 and driven by an input shaft 15b connected to the electric motor 17;
The eccentric booster drive gear 22 is eccentrically engaged with the drive gear 20 and revolves around the rotation axis of the drive gear 20 while rotating on its own axis.

The planetary mechanism 20 includes a sun gear 24 and an internal gear 26 that are concentric with the drive gear 21, and further rotates integrally with the eccentric boost drive gear 22 of the rotation boost drive mechanism 19. A plurality of planetary gears 28 are provided which engage with the planetary gears 28. planetary gear 28
has a smaller diameter than the eccentric booster drive gear 22, and is connected to the eccentric booster drive gear 22 in a wheel shaft relationship. The plurality of planetary gears 28 are supported by a carrier 30, and the carrier 30 further rotatably supports the eccentric booster drive gear 22 at one end thereof. The balance weight 32 extends outside the outer periphery of the internal gear 26 in the same plane as the eccentric boost drive gear 22 at the other end of the carrier 30 in order to absorb vibrations caused by the rotational movement of the eccentric boost drive gear 22. , shaft 32a,
32b or other suitable fixing means. The balance weight 32 may be formed integrally with the carrier 30. 2 and 3, the internal gear 26 is fixed, and the amplified output is transmitted to the driven shaft 1 of the sun gear 24.
Extracted from 5c. Lubricant 3 is inside the casing 15.
4, and at least a part of the eccentric booster drive gear 22 is in contact with this lubricant.

FIG. 3 shows a basic principle diagram for explaining the operation of the rotary booster 15 shown in FIG. 2. In FIG. There is.

In FIGS. 2 and 3, a small diameter drive gear 21
When driven by the input shaft 15b, the large-diameter eccentric booster drive gear 22 revolves around the axis of the driven shaft 15c while rotating. At this time, since the planet gear 28 is integrally connected to the eccentric boost drive gear 22, the planet gear 28 is rotated by the eccentric boost drive gear 22 with a torque larger than the torque of the small diameter drive gear 21. The increased torque is transmitted to the sun gear 24, and the driven shaft 15c of the sun gear 24 is
transmits increased power to

Particularly in FIG. 3, the internal gear 2
6 is fixed and the carrier 30 is rotated one rotation counterclockwise, the rotational speed and torque of each element will be considered. The number of teeth of the sun gear 24, planet gear 28, internal gear 26, eccentric boost drive gear 51, and drive gear 21, respectively.

0012

[Math 1]

[0013]

[Outside 1] n1, n2, n3 Then, these can be found using the following formula.

[0014]

[Math 2]

When the planet gear 28 rotates 1.5 rotations, the eccentric booster drive gear 22 also rotates 1.5 rotations. When the eccentric booster drive gear 22 rotates once, the rotation speed of the drive gear 21

0
016]

[Outside 2] n4 is obtained from the following equation.

[0017]

[Math 3]

The planetary gear 28 and the eccentric booster drive gear 22 are 1
．． Rotation speed of drive gear 21 when rotating 5 times

[0019]

[Outside 3] n5 is calculated by the following formula

[0020]

[Math 4]

[0021]

[Outside 4] n1' is calculated by the following formula

[0022]

[Math 5]

Assume now that the drive gear is rotated with a torque of 15 kg·cm. At this time, the eccentric boost drive gear 22
, the radius of the planet gear 28, sun gear 24 and drive gear 21 is

[0024]

[Math 6]

[0025]

[Math 7]

[0026]

[Outer 5] Ts is calculated by the following formula

[0027]

[Math. 8]

Power when the drive gear 21 rotates at 1500 revolutions per minute with a torque of 15 kg cm

[0029]

[Outer 6] M1 is calculated using the following formula.

[0030]

[Math. 9]

[0031] At this time, the sun gear is 25.5 kg/cm
of torque per minute.

[0032]

[Math. 10]

[0033]

[Outer 7] M2 is calculated using the following formula.

[0034]

[Math. 11]

[0035]

[Outer 8] S is calculated by the following formula

[0036]

[Math. 12]

[0037]

As is clear from the above, according to the present invention, it is possible to provide a high-performance woodworking machine that can significantly save energy. In the embodiment, each rotating element and the fixed element are explained as being composed of gears, but it is clear that the rotating elements such as rollers may be used instead of gears. In the embodiment, the planetary gears are shown as directly engaging with the sun gear and the internal gear, but each planetary gear has a first planetary gear that engages with the sun gear and a second planetary gear that engages with the internal gear. The first and second planetary gears may be configured to engage with each other. Further, although the output of the rotary booster is shown as being taken out from the sun gear of the planetary mechanism, it may be taken out from a carrier connecting the planetary gears. Note that the driven portion may be combined with a second-stage booster, a planetary mechanism, or a differential gear device.

[Brief explanation of drawings]

FIG. 1 is a block diagram of a high-performance woodworking machine according to the present invention.

FIG. 2 is a concrete structure of the rotary booster shown in FIG. 1;

FIG. 3 is a basic principle diagram for explaining the operation of the structure shown in FIG. 2;

[Explanation of symbols]

10 Woodworking machinery 11 Transmission device 15 Rotary booster 17 Electric motor 19 Rotary boost drive mechanism 20 Planetary mechanism 21 Drive gear 22 Eccentric boost drive gear 24 Sangia 26 Internal gear 28 Planetary gear 30 Career 32 Balance weight

Claims (3)

[Claims] 1. A woodworking machine main body having a main shaft, an electric motor for driving the main shaft, and a rotary booster disposed between the main shaft and the electric motor, the rotary booster being attached to a casing. and the casing includes a drive part made of a rotary boost drive mechanism arranged on the same axis and a driven part made of a planetary mechanism connected to the rotary boost drive mechanism, the rotary boost drive mechanism being The planetary mechanism includes a small-diameter drive gear connected to the electric motor, and a large-diameter eccentric boost drive gear that engages with the drive gear on the inside and revolves around the axis of the drive gear. a sun gear disposed on the axis of the drive gear, an internal gear concentric with the sun gear, and an internal gear disposed between the sun gear and the internal gear, and having a smaller diameter than the eccentric booster drive gear, and , and a planetary gear that rotates integrally with the woodworking machine, the woodworking machine being driven by the driven part. 2. In claim 1, the planetary mechanism further includes a carrier that supports the planetary gear, one end of the carrier rotatably supports the eccentric booster drive gear, and the other end of the carrier A woodworking machine comprising a balance weight disposed in the same plane as the eccentric booster drive gear. 3. The woodworking machine according to claim 1, wherein the internal gear is fixed, and the amplified output is taken out from the sun gear.