JP2002161964A - Change gear - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a change gear capable of automatically changing gear according to the change in the torque, gaining a great torque and enlarging the change gear range. SOLUTION: A first rotating body 3 having an input internal gear in the inside perimeter and rotating with an input shaft 1 is installed at an end part of an output shaft 2 of the input shaft 1. A secondary rotating body 5 is rotatable and outwards inserted in an end part of the input shaft 1 of the output shaft 2. An output gear 14 is outwards inserted and secured to an end 13 of the output shaft 2 protruded from the secondary rotating body 2 into the input shaft 1, and a first planetary gear 6 revolving around an axis L of the input shaft and the output shaft 1, 2 engaging with the output gear 14 and a secondary planetary gear 7 revolving around the axis L of the input shaft and the output shaft engaging with the internal gear 4 are rotatable and annexed to the secondary rotating body 5 around the axis parallel to the axis L of the input shaft and the output shaft respectively. The third planetary gear 15 revolving and rotating with the first planetary gear 6 is engaged with the secondary planetary gear 7.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transmission used for machine tools, industrial machines, construction machines, agricultural machines, vehicle machines and the like.

[0002]

2. Description of the Related Art As a conventional transmission of this type, a transmission or the like that is electrically controlled by an inverter, a servomotor, or the like is known.

[0003]

However, in the above-described transmission, in a low-speed range, the output is insufficient due to low torque, and the efficiency is poor.

Accordingly, an object of the present invention is to provide a transmission that can automatically shift in response to a change in torque, can obtain a large torque, and can increase the shift range. I do.

[0005]

In order to achieve the above-mentioned object, a transmission according to the present invention comprises a transmission having an input / output shaft rotatably supported on the same axis. A first rotating body having an input internal gear on an inner peripheral surface thereof and rotating integrally with the input shaft, provided at an end of the input shaft on the output shaft side on the same axis as the input shaft; The base is connected to the input shaft of the output shaft through a cylindrical portion which is externally fitted to the end of the output shaft, a base portion provided in an outer flange shape at the end of the cylindrical portion, and a connecting portion disposed at a predetermined pitch in the circumferential direction. And a shaft portion protruding from a central portion of the input shaft side end face of the disc portion and rotatably fitted into a hole in the end face of the input shaft. A second rotating body rotatably provided, and further, an output gear is externally fixed to an output shaft end protruding from the second rotating body toward the input shaft, and the second rotating body is fixed. A first planetary gear that meshes with the output gear and revolves around the same axis is attached to the base, and a second planetary gear that meshes with the input internal gear and revolves around the same axis. A planetary gear is attached to the above disk,
Further, the first planetary gear and the second planetary gear are rotatable around an axis parallel to the same axis, respectively. Further, the third planetary gear that revolves and rotates integrally with the first planetary gear is the above-mentioned. The number of teeth of the output gear is set to not more than 以下 of the number of teeth of the input internal gear, and the number of teeth of the third planetary gear is set to a predetermined number from the number of teeth of the first planetary gear. It is provided with a transmission means for setting a large number and further changing the rotation speed of the second rotating body.

In a transmission having an input / output shaft rotatably supported on the same axis, an input internal gear is provided on an inner peripheral surface of the transmission, and the input gear is rotated integrally with the input shaft. One rotating body is provided at the end of the input shaft on the output shaft side on the same axis as the input shaft, and is also provided with a base portion fitted externally to the end of the output shaft on the input shaft side in a circumferential direction. A disk portion integrally connected to and facing the base portion via a connecting portion disposed at a pitch, and an end surface of the input shaft protrudingly provided at a center portion of the input shaft side end surface of the disk portion. A second rotating body having a shaft rotatably fitted into the hole is rotatably provided, and an output gear is externally fitted and fixed to an output shaft end protruding from the second rotating body toward the input shaft. At the same time, in the second rotating body, a first planetary gear meshing with the output gear and revolving around the same axis is attached to the base portion. The second planetary gear revolves the same axis around and attached to the disc portion in mesh with the force internal gear,
Further, the first planetary gear and the second planetary gear are rotatable around an axis parallel to the same axis, respectively. Further, the third planetary gear that revolves and rotates integrally with the first planetary gear is the above-mentioned. The number of teeth of the output gear is set to not more than 以下 of the number of teeth of the input internal gear, and the number of teeth of the third planetary gear is set to a predetermined number from the number of teeth of the first planetary gear. A large number of brake units are provided, and a brake unit for applying a braking force to the second rotating body is provided.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the drawings showing the embodiments of the present invention.

FIG. 1 shows a transmission according to the present invention. The transmission includes an input shaft 1 that is rotatable, and an output shaft 2 that is rotatable about the same axis L as the input shaft 1. The input shaft 1 is connected at its base end to a prime mover (not shown) and driven to rotate, and the output shaft 2 is connected at its tip end to a machine driven at variable speed.

At the end of the input shaft 1 on the output shaft side, a first rotating body 3 that rotates integrally with the input shaft 1 is provided. The first rotating body 3 includes a disk portion 3a and a short cylindrical portion 3b, and an input internal gear 4 is provided on an inner peripheral surface of the short cylindrical portion 3b.

A second rotating body 5 is rotatably fitted on the output shaft 2. The second rotating body 5 has the output shaft 2
And a base portion 5b provided in an outer flange shape at an end of the cylindrical portion 5a.

The second rotating body 5 is provided with first and second planetary gears 6, 7 which rotate around the same axis L. That is, the second rotating body 5 includes the base 5
b is provided on the first shaft 8 protruding from the base portion 5b toward the disk portion 5c.
Is rotatably fitted to the outside, and the second planetary gear 7 is rotatably fitted to the second shaft 9 protruding from the disk portion 5c toward the base portion 5b.

The disk portion 5c is integrally connected to the base portion 5b via a connecting portion 10 arranged at a predetermined pitch in the circumferential direction. The axes of the first and second shafts 8 and 9 are parallel to the same axis L, and the shaft 11 protruding from the center of the end surface of the disk portion 5c on the input shaft 1 side is connected to the input shaft 1 Is rotatably fitted in the hole 12 on the end face of the.

An output gear 14 is externally fitted and fixed to an end 13 projecting from the output shaft 2 toward the input shaft 1, and as shown in FIGS. 1 and 2, the output gear 14 and the first planetary gear 6 are fixed. And the second planetary gear 7 meshes with the input internal gear 4 of the first rotating body 3.

A third planetary gear 15 which rotates integrally with the first planetary gear 6 is externally fitted to the first shaft 8 on which the first planetary gear 6 is rotatably fitted. Gear 15 is second
The planetary gear 7 meshes.

In this case, the number of teeth of the input internal gear 4 is larger than the number of teeth of the output gear 14. Specifically, the output gear 14
Is set to be equal to or less than の of the number of teeth of the input internal gear 4. Further, the number of teeth of the third planetary gear 15 is changed to the first planetary gear 6.
Is set to be more than the predetermined number of teeth (4 to 5 more). The number of teeth of the second planetary gear 7 is arbitrary.

The second rotating body 5 is provided with a speed changing means 16 for changing the rotation speed of the second rotating body 5. The speed change means 16 includes a pulley 18 which is attached to the second rotating body 5 via a sliding key 17 so as to be fitted externally.
A belt 19 is wound around an 18 and a pulley (not shown) attached to a rotating shaft of an electric motor (not shown).

Further, the pulley 18 comprises a pair of pulley halves 18a and 18b, one pulley half 18a is fixed to the second rotating body 5, and the other pulley half 18b is connected to the second rotating body 5a. , And is slidable in the axial direction, and is urged by a resilient member such as a spring (not shown) in a direction approaching the pulley half 18a.

Therefore, when the rotation shaft of the electric motor or the like (not shown) is rotated, the pulley 18 and the second rotating body 5 rotate integrally, and the pulley half 18a is rotated with respect to the pulley half 18a.
By moving b closer and farther, the belt 19 can be slid in the radial direction of the pulley 18 to change the rotation speed of the pulley 18 and the second rotating body 5.

According to the transmission configured as described above, when the input shaft 1 rotates and the first rotating body 3 rotates, the transmission meshes with the input internal gear 4 of the first rotating body 3. The second planetary gear 7 revolves around the same axis L while rotating. At this time, the second rotating body 5 corresponds to the reaction force of the output shaft 2.
The first and second shafts 8 and 9 revolve. Then, the third planetary gear 15 meshing with the second planetary gear 7 rotates, and the first planetary gear 6 that rotates integrally with the third planetary gear 15 rotates. When the first planetary gear 6 revolves while rotating, the output gear 14 meshing with the first planetary gear 6 rotates and the output shaft 2 rotates.

Since the transmission according to the present invention includes the speed change means 16 for changing the rotation speed of the second rotating body 5, the speed change of the input shaft 1 and the second rotating body 5 is performed when the input shaft 1 and the second rotating body 5 rotate. When the rotation of the second rotating body 5 (in the direction of arrow A) is made slower than the rotation of the input shaft 1 (in the direction of arrow A) by the means 16, the rotation of the output shaft 2 is reduced by the rotation speed difference of the gears. 1 and the speed of the input shaft 1 can be increased twice or more. Conversely, if the rotation of the second rotating body 5 is made faster than the rotation of the input shaft 1, the rotation of the output shaft 2
, And can be decelerated to a stopped state.
When the rotation of the second rotating body 5 is made equal to the rotation of the input shaft 1, the rotation of the output shaft 2 becomes equal to the rotation of the input shaft 1.
As described above, the speed of the output shaft 2 can be changed with a constant output over the entire area only by changing the rotation speed of the second rotating body 5 by the speed change means 16, and there is an advantage that the speed change range is wide. Transmission means
At 16, a wide shift range can be realized without rotating the second rotating body 5 too fast, so that the efficiency is good.

Next, FIG. 3 shows another embodiment of the transmission of the present invention. In this case, instead of the transmission means 16 described in FIG.
The base 5 of the second rotating body 5 is provided with a brake means 21.
The pad of the brake means 21 is provided at b so as to be able to slide and separate. Note that the cylindrical portion 5a of the second rotating body 5 is omitted.

According to this transmission, when the input shaft 1 rotates, the first and second shafts 8 and 9 revolve according to the reaction force of the output shaft 2. That is, the speed is automatically shifted according to the change in the torque. In this case, by applying a braking force to the second rotating body 5 by the braking means 21, the output shaft 2 can be braked and increased in speed.

It should be noted that the present invention is not limited to the above-described embodiment. For example, the first, second, and third planetary gears 6, 7, 15
Are provided one by one in the figure, but are not limited to this, and can be freely increased or decreased.

[0024]

Since the present invention is configured as described above, the following effects can be obtained.

According to the first aspect, the rotation of the input shaft 1 causes the second rotating body 5 to revolve in accordance with the reaction force of the output shaft 2, and automatically shifts according to a change in torque, and , Large torque can be obtained. In addition, the second
By changing the rotation speed of the rotating body 5 to a desired speed, the output shaft 2 can be accelerated / decelerated with a constant output over the entire area, and the speed change range is wide. Furthermore, there is an advantage that efficiency is high.

According to the second aspect, the rotation of the input shaft 1 causes the second rotator 5 to revolve in accordance with the reaction force of the output shaft 2 and automatically shifts in response to a change in torque, and , Large torque can be obtained. Further, by applying a braking force to the second rotating body 5 by the braking means 21, the output shaft 2 can be brake-shifted (increased).

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing one embodiment of the present invention.

FIG. 2 is a simplified diagram showing a positional relationship between gears.

FIG. 3 is a cross-sectional view showing another embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Input shaft 2 Output shaft 3 1st rotating body 4 Input internal gear 5 2nd rotating body 6 1st planetary gear 7 2nd planetary gear 10 Connecting part 11 Shaft part 12 Hole part 14 Output gear 15 3rd planetary gear 16 Speed change Means 21 Brake means L axis

Claims (2)

[Claims] 1. A transmission provided with input and output shafts 1 and 2 rotatably supported on the same axis L and having an input internal gear 4 on an inner peripheral surface. A first rotating body 3 that rotates integrally with the input shaft 1 is provided at an end of the input shaft 1 on the output shaft 2 side on the same axis L as the input shaft 1 and an end of the output shaft 2 on the input shaft 1 side. A cylindrical portion 5a fitted to the outer portion of the cylindrical portion 5a and a base portion 5b provided in an outer flange shape at an end portion of the cylindrical portion 5a and a connecting portion 10 disposed at a predetermined pitch in the circumferential direction relative to the base portion 5b. A disk portion 5c which is integrally and continuously provided so as to face each other, and a hole 12 formed in the end surface of the input shaft 1 protruding from the center of the end surface of the disk portion 5c on the input shaft 1 side.
Second rotating body 5 having a shaft portion 11 rotatably fitted in
Are rotatably provided, and an output gear 14 is externally fitted and fixed to an output shaft 2 end 13 protruding from the second rotator 5 toward the input shaft 1. A first planetary gear 6 meshing with the output gear 14 and revolving around the same axis L;
Is attached to the base portion 5b, a second planetary gear 7 meshing with the input internal gear 4 and revolving around the same axis L is attached to the disk portion 5c, and the first planetary gear 6 and the second planetary gear 7 are rotatable about an axis parallel to the same axis L, and the third planetary gear 15 that revolves and rotates integrally with the first planetary gear 6 is connected to the second planetary gear 6.
The number of teeth of the output gear 14 is set to not more than 以下 of the number of teeth of the input internal gear 4, and the number of teeth of the third planetary gear 15 is reduced to the number of teeth of the first planetary gear 6. A transmission characterized by further comprising a speed change means (16) for setting a predetermined number more and further changing the rotation speed of the second rotating body (5). 2. A transmission having input / output shafts 1 and 2 rotatably supported on the same axis L and having an input internal gear 4 on an inner peripheral surface thereof. A first rotating body 3 that rotates integrally with the input shaft 1 is provided at an end of the input shaft 1 on the output shaft 2 side on the same axis L as the input shaft 1 and an end of the output shaft 2 on the input shaft 1 side. A disk portion 5c and a disk portion 5c integrally connected to the base portion 5b via a connecting portion 10 arranged at a predetermined pitch in the circumferential direction and a base portion 5b fitted externally to the portion; The input shaft 1 has a hole 12 protruding from the center of the end surface on the input shaft 1 side.
Second rotating body 5 having a shaft portion 11 rotatably fitted in
Are rotatably provided, and an output gear 14 is externally fitted and fixed to an output shaft 2 end 13 protruding from the second rotator 5 toward the input shaft 1. A first planetary gear 6 meshing with the output gear 14 and revolving around the same axis L;
Is attached to the base portion 5b, a second planetary gear 7 meshing with the input internal gear 4 and revolving around the same axis L is attached to the disk portion 5c, and the first planetary gear 6 and the second planetary gear 7 are rotatable about an axis parallel to the same axis L, and the third planetary gear 15 that revolves and rotates integrally with the first planetary gear 6 is connected to the second planetary gear 15.
The number of teeth of the output gear 14 is set to not more than 以下 of the number of teeth of the input internal gear 4, and the number of teeth of the third planetary gear 15 is reduced to the number of teeth of the first planetary gear 6. A transmission characterized in that the transmission is further provided with a predetermined number of sheets larger than a predetermined number and a brake means 21 for applying a braking force to the second rotating body 5.