JP3011647B2 - transmission - Google Patents

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 has a simple structure, is easy to handle and manufacture, and covers a wide range.

[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; A cylindrical portion externally fitted to the end of the output shaft on the input shaft side, a base portion provided in an outer flange shape at the end of the cylindrical portion, and a connecting portion arranged at a predetermined pitch in the circumferential direction. /> provided integrally shaped relative surface to the base plate portion is disk-section and circular
The end face of the input shaft protruding from the center of the input shaft side end face of the panel
A second rotating body having a shaft rotatably fitted in the hole of the second rotating body 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 that meshes with the output gear and revolves around the same axis is attached to the base portion, and meshes with the input internal gear to form the second planetary gear. A second planetary gear that revolves around the same axis is attached to the disk,
The first planetary gear and the second planetary gear are each rotatable around an axis parallel to the same axis, and the third planetary gear revolves and rotates integrally with the first planetary gear. Meshed with the second planetary gear, the number of teeth of the input internal gear is made larger than the number of teeth of the output gear, and the number of teeth of the output gear and the number of teeth of the third planetary gear are the same; When the number of teeth of the internal gear is X times the number of teeth of the output gear,
The number of teeth of the first planetary gear is set to one of the number of teeth of the third planetary gear.
/ X is set slightly higher than / X, and further provided is a speed changing means for 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. disk portion that is integrally connected to form relative surface to the base plate portion through a connecting portion disposed at a pitch and the disc-
Protruding from the center of the input shaft end face of the
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 that meshes with the output gear and revolves around the same axis is attached to the base, and the same planetary gear meshes with the input internal gear. A second planetary gear that revolves around the axis is attached to the disk,
The first planetary gear and the second planetary gear are each rotatable around an axis parallel to the same axis, and the third planetary gear revolves and rotates integrally with the first planetary gear. Meshed with the second planetary gear, the number of teeth of the input internal gear is made larger than the number of teeth of the output gear, and the number of teeth of the output gear and the number of teeth of the third planetary gear are made equal; When the number of teeth of the internal gear is X times the number of teeth of the output gear,
The number of teeth of the first planetary gear is set to one of the number of teeth of the third planetary gear.
/ X, and a brake means for applying a braking force to the second rotating body.

[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 FIG. 2, the output gear 14 and the first planetary gear 6 mesh with each other. Then, 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 made larger than the number of teeth of the output gear 14, and the number of teeth of the output gear 14 and the number of teeth of the third planetary gear 15 are made equal. When the number of teeth of the input internal gear 4 is X times the number of teeth of the output gear 14, the number of teeth of the first planetary gear 6 is changed to the third planetary gear 15.
Slightly larger than 1 / X of the number of teeth. Specifically, if the number of teeth of the input internal gear 4 is twice the number of teeth of the output gear 14 and the number of teeth of the output gear 14 and the number of teeth of the third planetary gear 15 are the same, The number of teeth of one planetary gear 6 is slightly larger than half of the number of teeth of the third planetary gear 15 (about one or two teeth are sufficient).
This is to prevent the first and second shafts 8 and 9 from becoming smaller than the rotation of the first rotating body 3 (to prevent retreat). 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 is composed of 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 resiliently biased in a direction approaching the pulley half 18a by a resilient member such as a spring (not shown).

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. If the second planetary gear 7 rotates, the second planetary gear 7
The third planetary gear 15 meshing with the first planetary gear 15 rotates, and the first planetary gear 6 that rotates integrally with the third planetary gear 15 rotates.
When the first planetary gear 6 rotates, the output gear 14 meshing with the first planetary gear 6 rotates, and the output shaft 2 rotates.

In the present invention, the first and second shafts 8,
9 rotates faster than the first rotating body 3 (so-called leading). This (first run) forward idling is stopped by the torque reaction force of the output gear 14 with the setting of the number of teeth as described above, and the rotation is settled to an appropriate rotation and stabilized. That is, the first and second shafts 8 and 9 revolve in accordance with the reaction force of the output shaft 2, and the first and second shafts 8 and 9 rotate faster than the input shaft 1.

Further, the transmission shown in FIG. 1 is provided with transmission means 16 for changing the rotation speed of the second rotating body 5, so that the rotation of the second rotating body 5 is controlled by the transmission means 16 to the input shaft. If the rotation of the output shaft 2 is slower than the rotation of the input shaft 1, the rotation of the output shaft 2 will be slower than the rotation of the input shaft 1 due to the difference in the rotation speed of the gear.
That is, only by changing the rotation speed of the second rotating body 5 by the transmission means 16, the braking shift of the output shaft 2 can be performed with the constant output over the entire area.

FIGS. 3 and 4 show another embodiment. In this case, unlike the transmission shown in FIG. 1, the second rotating body 5 does not have the cylindrical portion 5a and the output gear 14 is set large. Further, in place of the speed change means 16, a brake means 21 is provided.

Therefore, also in this transmission, the output shaft 2
The first and second shafts 8 and 9 revolve in accordance with the reaction force. That is, the speed is automatically shifted according to the change in the torque.

In this case, if the braking means 21 applies a braking force to the second rotating body 5, the speed of the output shaft 2 increases.

The input internal gear 4, the first, second, and third gears
The number of teeth of the planetary gears 6, 7, 15 and the output gear 14 and the like can be changed depending on the application, but the first and second shafts 8, 9 are provided.
Must be set so as not to be smaller than the rotation of the input internal gear 4 (so as not to retreat). (If you retreat,
The output gear 14 will rotate faster than the input internal gear 4, which is not possible. That is, in the present invention, the first and second shafts 8 and 9 need to rotate faster than the input internal gear 4. The first, second, and third planetary gears 6, 7, and 15 are provided in pairs in the illustrated example, but are not limited to this, and may be freely increased or decreased.

[0026]

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

According to the transmission of the first aspect, the transmission is automatically shifted in response to a change in the torque. In addition, there is an advantage that a large torque can be obtained and a shift range is large. According to the transmission of the second aspect, the speed of the second rotating body 5 can be increased to a desired speed. According to the transmission of the third aspect, a braking shift can be performed.

[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.

FIG. 4 is a simplified diagram showing a positional relationship between gears.

[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 14 output gear 15 3rd planetary gear 16 Transmission means 21 Brake means L Coaxial center

Claims (2)

(57) [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. Cylindrical part 5a fitted to the outer part and a base part 5b provided in an outer flange shape at an end of the cylindrical part 5a at a predetermined pitch in the circumferential direction.
Relative surface to the base plate portion 5b via the connecting portion 10 which is provided
A disk portion 5c provided integrally and an input shaft of the disk portion 5c
A hole 12 protruding from the center of the end surface on the side of the
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 portion 13 projecting from the second rotating body 5 toward the input shaft 1 side. 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.
Meshed with the planetary gear 7, the number of teeth of the input internal gear 4 is made larger than the number of teeth of the output gear 14, and the number of teeth of the output gear 14 is the same as the number of teeth of the third planetary gear 15; When the number of teeth of the input internal gear 4 is X times the number of teeth of the output gear 14, the number of teeth of the first planetary gear 6 is slightly smaller than 1 / X of the number of teeth of the third planetary gear 15. And the second
A transmission comprising a transmission means (16) for changing the rotation speed of the 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. At a predetermined pitch in the circumferential direction with the base portion 5b externally fitted to the portion
Relative surface to the base plate portion 5b via the connecting portion 10 which is provided
A disk portion 5c provided integrally and an input shaft of the disk portion 5c
A hole 12 protruding from the center of the end surface on the side of the
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.
Meshed with the planetary gear 7, the number of teeth of the input internal gear 4 is larger than the number of teeth of the output gear 14, and the number of teeth of the output gear 14 and the number of teeth of the third planetary gear 15 are the same; When the number of teeth of the input internal gear 4 is X times the number of teeth of the output gear 14, the number of teeth of the first planetary gear 6 is slightly smaller than 1 / X of the number of teeth of the third planetary gear 15. And the second
A transmission comprising a brake means (21) for applying a braking force to the rotating body (5).