JP2578956Y2 - 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 applied to a speed increaser of a wind turbine and a reduction gear of a drainage pump.

[0002]

2. Description of the Related Art FIG. 5A shows a conventional example of a transmission (two-stage transmission) using a cylindrical roller, and FIG.
1 shows a conventional example of a transmission (single-stage transmission) using a cylindrical roller. FIG. 6 (a) shows a conventional transmission (two-stage transmission) using a conical traction roller, and FIG. 6 (b) shows a conventional transmission (single-stage transmission) using a conical traction roller. An example is shown.

First, a transmission (two-stage transmission) using cylindrical rollers shown in FIG. 5A will be described. Reference numeral 01 denotes an input shaft, and reference numeral 02 denotes an input shaft which is integrally mounted on the input shaft 01 via a key or the like. A cylindrical roller, an intermediate shaft 03 is parallel to the input shaft 01,
04 and 05 are cylindrical rollers integrally attached to the intermediate shaft 03 via a key or the like, and 07 is an input shaft 01 and an intermediate shaft 03.
The output shaft 06 is a cylindrical roller integrally attached to the output shaft 07 via a key or the like. The rotation of the input shaft 01 is controlled by the cylindrical roller 02 → cylindrical roller 04 → intermediate shaft 03 → cylindrical. Roller 05 is transmitted to output shaft 07 via cylindrical roller 06.

In this transmission, Ni is the number of revolutions of the input shaft (high-speed side) 01, No is the number of revolutions of the output shaft (low-speed side) 07, and d _{1 to} d ₄ are cylindrical rollers 02, 04, 05,
Assuming a diameter (outer diameter) of 06, No = d ₃ / d ₄ · d ₁
/ D ₂ · Ni. Next, a transmission (single-stage transmission) using a cylindrical roller shown in FIG. 5B will be described. A cylindrical type 01 is integrally mounted on the input shaft 01 via a key or the like. Roller, 07 is input shaft 0
Reference numeral 06 denotes a cylindrical roller which is integrally attached to the output shaft 07 via a key or the like. The input shaft 01 rotates through the cylindrical roller 02 → the cylindrical roller 06 via the cylindrical roller 06.
7.

In this transmission, Ni is the number of revolutions of the input shaft (high-speed side) 01, No is the number of revolutions of the output shaft (low-speed side) 07, and d ₁ and d ₂ are the diameters of the cylindrical rollers 02 and 06 ( (Outer diameter), a speed ratio of No = d ₁ / d ₂ · Ni can be obtained. Next, a transmission (two-stage transmission) using a conical traction roller shown in FIG.
Is an input shaft, 2 is a conical traction roller integrally mounted on the input shaft 1 via a key or the like, 3 is an intermediate shaft orthogonal to the input shaft 1, and 4 and 5 are keys on the intermediate shaft 3 via a key or the like. Conical traction roller, which is integrally mounted, and 7 is the intermediate shaft 3
The output shaft 6 is a conical traction roller integrally attached to the output shaft 7 via a key or the like.
By pressing the conical traction roller 2 in the direction of arrow A and pressing the conical traction roller 2 against the conical traction roller 4, the intermediate shaft 3 and the conical traction rollers 4, 5 are pressed in the direction of arrow B to form the conical traction roller. 5 is pressed against the conical traction roller 6, and the rotation of the input shaft 1 is changed to the traction roller 2 →
The power is transmitted to the output shaft 7 via the traction roller 4 → the intermediate shaft 3 → the traction roller 5 → the traction roller 6.

Next, a transmission (single-stage transmission) using a conical traction roller shown in FIG. 6B will be described.
1 is an input shaft, 2 is a conical traction roller integrally attached to the input shaft 1 via a key or the like, 7 is an output shaft orthogonal to the input shaft 1, and 6 is an output shaft 7 via a key or the like. The input shaft 1 and the conical traction roller 2 are pushed in the direction of the arrow by a conical traction roller integrally mounted, and the conical traction roller 2 is conical traction roller 6.
, And the rotation of the input shaft 1 is transmitted to the output shaft 7 via the traction roller 2 → the traction roller 6.

In the transmission shown in FIGS. 6A and 6B, the gear ratio is the same as that of the cylindrical roller.
In the case of the two-step speed change in (a), No = d ₃ / d ₄ · d ₁
/ D ₂ · Ni, and the speed ratio of No = d ₁ / d ₂ · Ni can be obtained in the case of the single-stage speed change shown in FIG.

[0008]

The transmission shown in FIG. 6A has the following problems. That is, the input shaft 1 and the conical traction roller 2 are pushed in the direction of arrow A, and the conical traction roller 2 is pressed against the conical traction roller 4. Assuming that the normal force of the conical traction rollers 2 and 4 generated by the roller pressing force at this time is F _A , when the input shaft 1 is driven by a drive source (not shown), FIG. A slight slip S shown in an explanatory diagram showing the tendency of frictional force) is generated on the roller contact surfaces of the conical traction rollers 2 and 4 according to the driving resistance of the intermediate shaft 3. Therefore, if F _A is small, the traction force f
F _A can not be obtained small predetermined drive torque. Therefore, strongly pressed against the conical traction rollers 2,4, it is necessary to obtain a predetermined traction force fF _A. The same applies to the other conical traction rollers 5 and 6 and the conical traction rollers 2 and 6 of the transmission shown in FIG. 6B.

The present invention has been made in view of the above-mentioned problems, and the object thereof is to provide a roller pressing force for generating a large traction force on a roller contact surface between conical traction rollers by a simple means. Obtainable. Also, even if the conical traction roller is rotating,
The roller pressing force can be adjusted. Further, the wear of the roller can be compensated. It is another object of the present invention to provide a transmission capable of adjusting (self-alignment) the one-side contact of the thrust bearing.

[0010]

SUMMARY OF THE INVENTION To achieve the above object, the present invention provides a set of conical tractors mounted on an intermediate shaft.
Roller and a conical torsion attached to the input and output shafts
In a transmission device in which a predetermined speed ratio is obtained by bringing the traction rollers into contact with each other to obtain a predetermined speed ratio based on a roller diameter ratio of the conical traction rollers, the rotation shafts are connected to a main casing.
And the main casing and the front
An elastic body is interposed between the auxiliary casing and tightened,
So that the conical traction rollers are pressed against each other
It is characterized by having comprised.

The transmission of the present invention is mounted on an intermediate shaft.
Set of conical traction rollers, input shaft and output
Connect the conical traction roller attached to the shaft
By touch, by the transmission to obtain a predetermined speed ratio by a roller diameter ratio of these conical traction rollers, the
Attached to the casing surrounding each rotating shaft and the input shaft
Between the conical traction roller and the casing
And a conical traction roller mounted on the output shaft
Conical traction mounted on said intermediate shaft in contact with
Thrust bearings are interposed between the
Contact the traction roller with the last bearing
In the direction of the other conical traction roller
A hydraulic circuit for pressing a thrust bearing is provided in the casing .

[0012]

The transmission according to the present invention has the above- mentioned rotary shafts as described above.
Is surrounded by a main casing and a sub casing, and the main casing is
An elastic body is interposed between the casing and the sub-casing.
And push the conical traction rollers together.
In addition, a roller pressing force that generates a large traction force is generated .

Further , the transmission of the present invention is, as described above,
Attached to the casing surrounding the rotating shaft and the input shaft
Between the girder conical traction roller and the case
And a conical traction rod mounted on the output shaft
Conical tractor mounted on the intermediate shaft that contacts the roller
A thrust bearing is interposed between the
Contact the traction roller with the same thrust bearing
Towards the other conical traction roller to touch
A hydraulic circuit for pressing the thrust bearing is provided in the casing.
Therefore, when the hydraulic pressure of the hydraulic circuit acts, a roller pressing force that generates a large traction force on the contact surface of the traction roller is generated via the thrust bearing.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS (First Embodiment) Next, a transmission according to the present invention will be described with reference to a first embodiment shown in FIGS. 1 and 2. In FIG. 1, reference numeral 1 denotes an input shaft; Conical (truncated cone) integrally attached via
An intermediate shaft in which the traction roller 3 is orthogonal to the input shaft 1;
4, 5 are conical traction rollers integrally attached to the intermediate shaft 3 via a key or the like, 7 is an output shaft orthogonal to the intermediate shaft 3, and 6 is an integral output shaft 7 via a key or the like. in mounting conical traction roller, and the tip O ₂ of the cone of the cone of the tip O ₁ and conical traction rollers 5 and 6 of the conical traction rollers 2,4, lies on the axis of the intermediate shaft 3.

Reference numeral 14 denotes a sub-casing, 15 denotes a main casing, 15 'denotes a bottom of the main casing, and 8 and 9 denote bearings for rotatably supporting the input shaft 1 on the main casing 15, 10, and 11.
Are bearings that rotatably support the intermediate shaft 3 on the sub casing 14, and 12 and 13 are bearings that rotatably support the output shaft 7 on the main casing 15. 16 is a mounting bolt, 17 is an elastic body (elastic body such as a polymer material), and the elastic body 17 is interposed between the sub casing 14 and the main casing 15 and between the main casing 15 and the main casing bottom 15 ′. These casings are tightened with mounting bolts 16 to generate roller pressing force on the contact surfaces (a) of the conical traction rollers 2 and 4 and the contact surfaces (b) of the conical traction rollers 5 and 6. It is made to let.

Reference numerals 18 and 22 denote sealing members, 19, 20, and 2
Reference numeral 1 denotes a lid, and a lid 19 having a seal member 18 seals lubricating oil on the input shaft 1 side, and a lid 21 having a seal member 22 seals lubricating oil on the output shaft 7 side. FIG. 2 (a)
As described above, the elastic body 17 is interposed between the sub casing 14 and the main casing 15 (and between the main casing 15 and the main casing bottom 15 ′), and the sub casing 14 and the main casing 15 (and the main casing 15). FIG. 2B shows an example in which the main casing bottom 15 ′) is tightened with the mounting bolts 16. However, as shown in FIG.
The roller pressing force may be kept constant by interposing an elastic body 17 and a spring 23 therebetween.

Next, the operation of the transmission shown in FIG. 1 will be specifically described. When the casings 14 and 15 are tightened, the roller contact surfaces (a) of the conical traction rollers 2 and 4 are pressed, and a slight slip occurs on the roller contact surfaces (a) to generate traction force, and the input force is reduced. Axis 1
Is transmitted to the intermediate shaft 3. The roller contact surfaces (b) of the conical traction rollers 5 and 6 are also the casing 1
The rollers 4 and 15 are pressed by being pressed, and a slight slippage occurs on the roller contact surface (b) to generate a traction force, and the rotation of the intermediate shaft 3 is transmitted to the output shaft 7.

In this case, the speed reduction device has a reduction ratio determined by the roller diameter ratio. However, if the shaft 7 is the input shaft and the shaft 1 is the output shaft, the speed reduction device is obtained. The embodiment shown in FIG. 1 is a case where the input shaft 1 and the output shaft 7 are parallel to each other. In this case, a two-stage speed change system is adopted, and one conical traction roller of each stage is horizontally arranged. , To suppress an increase in the height direction. Transmission ratio in this case _{is, No / Ni = d 3 /} d 4 ·
d ₁ / d ₂ . On the other hand, when the input shaft 1 and the output shaft 7 are orthogonal to each other, a single-stage speed change method (see FIG. 6A) is employed. Transmission ratio in this case is _{No / Ni = d 1 / d} 2.

Second Embodiment Next, the transmission of the present invention will be described with reference to a second embodiment shown in FIG. 3. In the second embodiment, the roller pressing force load structure is different from that of the first embodiment. A roller pressing force loading mechanism is provided for the conical traction rollers 2 and 5. That is, a single-row thrust ball bearing 27 is interposed between the large-diameter side of the conical traction roller 5 and the main casing bottom 15 ′, and one rolling wheel of the single-row thrust ball bearing 27 is connected to the conical traction roller 2. 5 is fitted and fixed by interference fit, and the other rolling wheel is fitted into a circular groove provided in the casing 15.

A seal member 29 is provided on the side surface of the rolling wheel.
A hydraulic chamber 28 is provided behind the casing-side (fixed-side) rolling wheels, and a hydraulic circuit 30 communicating with the hydraulic chamber 28 is provided.
31 is provided on the main casing bottom 15 '. The roller pressing force load mechanism described above is also provided on the conical traction roller 2 side.

Next, the operation of the transmission shown in FIG. 3 will be specifically described. The hydraulic pressure of the hydraulic circuits 30 ', 31' is applied to the conical traction roller 2 via a single row thrust ball bearing 27 '.
And pushes the conical traction roller 2 in the direction of the conical traction roller 4. Hydraulic circuits 30, 3
The hydraulic pressure of 1 is transmitted to the conical traction roller 5 via the single-row thrust ball bearing 27 to push the conical traction roller 5 in the direction of the conical traction roller 6.

Therefore, a traction force is generated on the roller contact surfaces (a) of the conical traction rollers 2 and 4, and the input shaft
1 is transmitted to the intermediate shaft 3. Also conical tractors
Traction on the roller contact surfaces (b) of the transfer rollers 5 and 6
As a result, the rotation of the intermediate shaft 3 is transmitted to the output shaft 7. In this case, even if the conical traction roller is rotating, the roller pressing force can be adjusted. Further, even if the conical traction roller is worn, the large end of the conical traction roller is pushed by the hydraulic pressure, so that the wear of the roller is compensated. In addition, since the rolling wheel on the casing side (fixed side) of the thrust bearing is supported by the sealing material and the hydraulic pressure, the one-side contact of the thrust bearing is adjusted (automatic alignment).
It is possible.

(Third Embodiment) Next, the transmission of the present invention will be described with reference to a third embodiment shown in FIG. 4. In the third embodiment, the single row thrust ball bearing (rolling bearing) of the second embodiment is described. ) 27, a tilting pad thrust bearing (slide bearing) 32 is used. In this case, a deviation between the center of the conical traction roller 5 and the center of the hydraulic chamber 28 does not directly affect the bearing performance, and stable roller pressing force and bearing durability can be obtained.

A bearing of a parallel plane type or a tapered land type can be appropriately selected according to the required roller pressing force.

[0025]

[Effects of the Invention] As described above, the transmission according to the present invention can be used for each rotation.
Surround the shaft with the main casing and sub-casing, and
An elastic body is interposed between the casing and the sub-casing.
And push the conical traction rollers together.
Since then attached, by simple means, a roller pressing force that does not cause a minute slip roller contact surfaces can be generated.

The transmission of the present invention has the
Attached to the casing surrounding each rotating shaft and the input shaft
Between the conical traction roller and the casing
And a conical traction roller mounted on the output shaft
Conical traction mounted on said intermediate shaft in contact with
Thrust bearings are interposed between the
Contact the traction roller with the last bearing
In the direction of the other conical traction roller
Hydraulic circuit pushing thrust bearing is provided in the casing
Therefore, when the hydraulic pressure of the hydraulic circuit acts, a roller pressing force that generates a large traction force on the contact surface of the traction roller is generated through the thrust bearing,
The roller pressing force can be adjusted even when the conical traction roller is rotating. Further, even if the conical traction roller is worn, the large end of the conical traction roller is pushed by the hydraulic pressure, so that the wear of the roller can be compensated. Further, since the rolling wheel on the fixed side of the thrust bearing (casing side) is supported by the sealing material and the hydraulic pressure, it is possible to adjust the one-side contact of the thrust bearing (automatic alignment).

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional side view showing a first embodiment of a transmission according to the present invention;

FIG. 2A is a longitudinal sectional side view showing a casing fastening portion of the transmission, and FIG. 2B is a longitudinal sectional side view showing another example of the casing fastening portion.

FIG. 3 is a longitudinal sectional side view showing a second embodiment of the transmission.

FIG. 4 is a vertical sectional side view showing a third embodiment of the transmission.

FIG. 5A is a side view showing a conventional two-speed transmission using a cylindrical roller, and FIG. 5B is a side view showing a single-speed transmission.

6A is a side view showing a conventional two-speed transmission using a conical traction roller, and FIG. 6B is a side view showing a single-speed transmission.

FIG. 7 is an explanatory diagram showing a tendency of a frictional force generated on a roller contact surface.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Input shaft 2 Conical traction roller 3 Intermediate shaft 4-6 Conical traction roller 7 Output shaft 8-13 Bearing 14 Sub casing 15 Main casing 15 'Main casing bottom 16 Mounting bolt 17 Elastic material 18,22 Seal member 19-21 Lid 23 Spring 27, 27 'Thrust rolling bearing 28 Hydraulic chamber 29 Seal member 30, 31 Hydraulic circuit 32 Thrust sliding bearing

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) F16H 13 / 04,13 / 10

Claims (2)

(57) [Scope of request for utility model registration] 1. A set of conical tractors mounted on an intermediate shaft
Roller and conical truss attached to the input shaft and output shaft
By contacting respectively the transfection roller, in the transmission apparatus for obtaining a predetermined gear ratio by a roller diameter ratio of these conical traction rollers, each of said rotary shaft main casing
And the main casing and the sub-casing.
An elastic body is interposed between the sub-casing and tightened.
Press the traction rollers together.
A transmission which is characterized by being realized. 2. A set of conical tractors mounted on an intermediate shaft.
Roller and conical truss attached to the input shaft and output shaft
And transfection roller in contact respectively, in the transmission apparatus for obtaining a predetermined gear ratio by a roller diameter ratio of these conical traction rollers, cable surrounding the rotary shafts
Sing and conical traction row attached to the input shaft
And between the casing and the output shaft.
The intermediate shaft contacting the conical traction roller
Between the mounted conical traction roller
The thrust bearing is interposed, and the thrust bearing is mounted.
Traction roller in contact with the other traction roller
Hydraulic pressure that pushes the thrust bearing toward the roller
A transmission , wherein a circuit is provided in the casing .