JPH08114256A - Orthogonal type rolling transmission gear - Google Patents

Abstract

PURPOSE: To provide an orthogonal type rolling transmission gear for transmitting stably power for a long period with satisfactory durability by adjusting the axial position and angle of an input or output shaft on a plane including the axes of the input and output shafts of a bearing housing for the input or output shaft. CONSTITUTION: In combination of a small diameter tapered roller 36 and large diameter tapered roller 41 orthogonal to each other, both tapered rollers are pressed into contact with each other to transmit power corresponding to the frictional force. The contact pressure of both tapered rollers is adjusted by loosening fastening bolts 51 of a slide bearing housing 45, pushing simultaneously a plurality of push bolts 54 in a housing 35 and pushing the slide bearing housing 45 axially. Also, an angle made between an output shaft 38 and input shaft 31 is adjusted by loosening the fastening bolts 51, turning adjusting screws 52 at both sides below 43 a housing to move the slide shaft housing 45 along a fastening surface, adjusting the mounting angle of the slide bearing housing 45 to afford the contact ever the whole bus line and fixedly fastening the slide bearing housing 45 with the fastening bolts 51.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to an orthogonal rolling friction transmission.

[0002]

2. Description of the Related Art A conventional example of an orthogonal rolling transmission device will be described with reference to FIG. In the figure, an input shaft 11 includes a bearing 13, which is provided on the front and rear of the input shaft 11 with a spacer 12 interposed therebetween.
It is rotatably supported by a casing 15 via 14, and a small taper roller 16 having a small diameter is integrally formed at its tip. The input shaft 11 is integrated with the bearings 13 and 14 and the spacer 12 so as to be movable in the axial direction.

An output shaft 18 orthogonal to the input shaft 11 is mounted on the casing 15 and its cover 17 as bearings 19 and 20.
A large taper roller 21 having a large diameter, which is rotatably supported via a shaft and abuts the small taper roller 16 on the output shaft 18.
Are integrally formed. Also, this large taper roller 2
1 and an idler taper roller 22 that abuts the small taper roller 16 at a position symmetrical with respect to the extension line of the center axis of the input shaft 11 and is rotatable with respect to the output shaft 18 and the casing 17 via a bearing 23 and a thrust bearing 24. It is supported.

On the other hand, on the input side of the input shaft 11, the tip of the casing 15 is brought into contact with the bearing 14 and the input shaft cover 25 is screwed in, and the pin 26 is inserted into the casing 15.
Is stopped by.

In order to assemble the transmission having the above structure, the output shaft 18 and the idler taper roller 22 are assembled in the casing 15, the cover 17 is tightened, and then the input shaft 11 is inserted in the casing 15. After the input shaft 11 is inserted, in order to generate an axial pressing force T described later on the input shaft 11,
Clamp the input shaft cover 25 with an appropriate tightening force.
After being inserted therein, it is fixed to the casing 15 with the pin 26.

By tightening the input shaft cover 25, an axial pressing force T acts on the input shaft 11 via the bearing 14, the spacer 12 and the bearing 13, and the small taper roller 16, the large taper roller 21 and the idle taper roller 22 are connected. A pressure contact force P is generated on the contact surface in proportion to the pressing force T, and a frictional force F due to the pressure contact force P transmits power between the small taper roller 16 and the large taper roller 21.

As described above, the pressing force T and the pressure contact force P are proportional,
The pressure contact force P and the friction force F are also proportional. That is, the pressing force T and the frictional force F are in a proportional relationship, and the frictional force F can be adjusted by adjusting the pressing force T due to the change in the tightening amount of the input shaft cover 25. The power can be adjusted by the pressing force T.

The rotation transmitted from the input shaft 11 to the output shaft 18
Regarding the number of turns, the small taper roller 16 and the large taper roller
The diameter of the circle of the cross section perpendicular to the axis at the 21 common contact points
D ₁, D₂If so, the small taper roller 16 rotates n times.
While the large taper roller 21 is n × d₁/ D₂When you rotate
Have a relationship to say.

During power transmission, the idler taper roller 22 reduces the radial load acting on the bearings 13 and 14 of the input shaft 11. This leads to downsizing of the bearings 13 and 14, and eventually downsizing of the entire device.

[0010]

In the orthogonal rolling friction transmission of the prior art, since the pressure contact surfaces of the small taper roller 16 and the large taper roller 21 are relatively fixed in position and have no flexibility, they are small. The taper machining error, the squareness error in the axial direction of the large taper roller 21 at the time of assembly, or the change in the taper due to the bending of the shaft causes strong uneven contact, which causes partial wear.

SUMMARY OF THE INVENTION An object of the present invention is to provide an orthogonal rolling transmission device which is capable of stable power transmission over a long period of time and has good durability.

[0012]

In order to achieve the above object, as a means for dealing with uneven contact of the wear surface of a taper roller, it is rotatably supported by a bearing housing which is fitted in a housing and whose axial position can be adjusted. An input or output shaft integrally formed with a small diameter taper roller at its tip is rotatably supported in the housing orthogonal to the input or output shaft, and is in pressure contact with the small diameter taper roller at a taper portion busbar. In an orthogonal rolling transmission composed of an output shaft or an input shaft in which a large-diameter taper roller is integrally fixed, a bearing housing for the input or output shaft, which is provided with a parallel plane symmetrical about the shaft center line, The housing is divided into two parts on a plane including the central axis of the input shaft and the output shaft, and the housing is provided with a mounting portion hole having a flat surface for clamping the parallel surface of the bearing casing in parallel symmetry on the split surface. By adjusting the axial position of the input or output shaft and the angle of the input or output shaft on the plane including the axis of the input shaft and the output shaft, the bearing housing of the input or output shaft is provided with a small diameter taper roller. A means for solving the problem is provided by an orthogonal rolling transmission having a function of adjusting so that the taper portion generatrix with the large diameter taper roller is in full contact and has an appropriate pressure contact force.

Further, in the above-mentioned orthogonal type rolling transmission, a vertical screw hole penetrating to the outside is opened at a position where the housing is tightened or the output shaft bearing housing is tightened, and a push screw is screwed into the hole so that the bearing housing is screwed. If the fixing means after the taper alignment is used, the adjustment work becomes easy, which is preferable.

[0014]

In the combination of the small-diameter taper roller and the large-diameter taper roller which are orthogonal to each other, the taper of both taper rollers are brought into contact with each other so as to press each other, and the power corresponding to the frictional force is transmitted. The input shaft thrust due to the contact pressure of both taper rollers is supported by the ball bearing inside the input or output shaft bearing housing, and the output or input shaft thrust is supported by the ball bearing with thrust receiving capacity fitted in the output or input shaft. Has been.

The contact pressure between the two taper rollers may be adjusted by loosening the tightening of the input or output shaft bearing casing and pushing the bearing casing in the axial direction with respect to the housing. However, when each component has a processing error (particularly, a taper angle error) or an assembly error, the taper of both taper rollers does not match, resulting in uneven contact. In addition, even when the output shaft bends due to the contact pressure of the tapered surface, the tapered surface may be tilted to cause uneven contact. In these cases,
Power transmission cannot be performed smoothly and uneven wear occurs.

In such a case, the angle of the input or output shaft with respect to the output or input shaft may be adjusted so as to be slightly shifted. This adjustment loosens the tightening of the input or output shaft bearing housing,
The mounting angle of the input or output shaft bearing housing is adjusted so that the contact of the small diameter taper roller against the large diameter taper roller properly makes contact with all busbars under load. After that, the bearing housing is tightened again to be fixed.

Further, a vertical screw hole penetrating to the outside is opened in the housing insertion or output shaft bearing housing tightening position, and a push screw is screwed into the screw hole to adjust the input or output shaft angle. After loosening the push screw without loosening the tightening, the mounting angle of the input or output shaft bearing housing is adjusted, and the push screw is tightened and fixed.

[0018]

1 to 4 show an embodiment of an orthogonal rolling friction type transmission device to which the present invention is applied. First, the configuration of the device will be described. The housing 35 is a plane that includes the center lines of the transmission shafts orthogonal to each other, and is divided into two parts, a housing lower 43 and a housing upper 44.
It consists of. As shown in FIG. 3, the mounting plane portions 45a and 45b of the slide bearing housing 45 are aligned with the tightening surfaces 43a and 44a of the housing housing mounting hole 60 of the housing 35,
The shim 49 is sandwiched in the gap so that the filling and tightening force works sufficiently, and the mounting bolt 51 of the housing 35 is used for tightening.

An input shaft 31 having a small-diameter taper roller 36 integrally provided at the tip thereof is fitted to the bearings 33 and 34 provided to be fitted in the slide bearing casing 45, and is supported so as to be freely rotatable. The input shaft 31 is constrained in the thrust direction by the bearings 33 and 34 and the spacer 32. Reference numeral 48 represents a lock nut.

Two symmetrical end portions 45 of the slide bearing casing 45
Two push bolts 54 are attached to the housing 35 through the hole of c.
It is screwed into the screw hole. This is for pushing the small-diameter taper roller 36 toward the output shaft side by pushing the slide bearing casing 45 in the axial direction. Further, the four adjusting screws 52 screwed into the screw holes of the lower housing 43 adjust the angular position of the input shaft 31, that is, the taper roller 36 having a small diameter, via the slide bearing housing 45. 53
Is a blind lid of the screw hole of the housing 43.

A through hole is formed in the housing 35 on a line orthogonal to the axis center line of the input shaft 31, and the output shaft 38 is rotatably supported by the through hole through ball bearings 39 and 40. A large diameter taper roller 41 is attached to the output shaft 38.
Are provided integrally. The small-diameter taper roller 36 and the large-diameter taper roller 41 are arranged so as to come into pressure contact with each other by a taper. The ball bearing 39 has a thrust receiving capacity sufficient to receive the thrust generated by the contact pressure of the taper surface of the large diameter taper roller 41. Reference numeral 46 denotes an inspection port lid for an inspection port for checking the contact state of both taper rollers. Reference numeral 47 is a seal member such as an O-ring provided between the housing 35 and the slide bearing casing 45.

By pushing the slide bearing casing 45 into the housing 35 and pushing the input shaft 31 in the axial direction, a large contact pressure is generated between the small-diameter taper roller 36 and the large-diameter taper roller 41, and friction transmission is enabled.

The one shown in FIG. 4 has a plurality of holding screws 55.
Pushes the slide bearing casing 45 strongly to attach the flat surface 4
5a is pressed against the tightening surface 43a of the lower housing 43 and fixed by frictional force. 56 is a lock nut.

Even if the input shaft and the output shaft of the device having the above-mentioned structure are exchanged (in this case, it becomes a speed increasing device), the same function can be achieved.

Next, the operation of the device having this structure will be described.
In the combination of the small-diameter taper roller 36 and the large-diameter taper roller 41 which are orthogonal to each other, both taper rollers are brought into contact with each other so that their tapers press each other, and the power corresponding to the frictional force is transmitted. The input shaft thrust due to the contact pressure of both taper rollers is supported by the ball bearing 33 in the slide bearing housing 45, and the thrust of the output shaft 38 is supported by the ball bearing 39 on the output shaft side.

To adjust the contact pressure of both taper rollers, the tightening bolt 51 of the slide bearing casing 45 is loosened, and the plurality of push bolts 54 are simultaneously pushed into the housing 35, so that the slide bearing casing 45 is pushed in the axial direction. Good.

However, when there is a processing error (particularly, a taper angle error) or an assembly error in each part, the taper of both taper rollers does not match, resulting in an eccentric contact, and the contact pressure of the taper surface causes the output shaft 38 to bend and taper. The surface may be tilted, resulting in uneven contact. In such a case, power cannot be transmitted smoothly and uneven wear occurs.

To adjust the input shaft angle with respect to the output shaft in such a case, first loosen the tightening bolts 51 of the slide bearing housing 45 and turn the adjusting screws 52 on both sides of the lower housing 43 to tighten the slide bearing housing 45. The mounting angle of the slide bearing casing 45 is adjusted so that the small-diameter taper roller 36 contacts the large-diameter taper roller 41 so that the contact with the large-diameter taper roller 41 correctly contacts over all the busbars under the load condition, and then, The bearing casing 45 is fixed again by tightening it with the tightening bolt 51.

Adjustment of the input shaft angle in the case of the configuration of FIG.
After loosening the lock nut 56 and loosening the cap screw 55 without loosening the tightening bolt 51 that is tightening the housing 35, the adjusting screws 52 on both sides of the lower housing 43 are turned to fix the slide bearing casing 45 to the tightening surface 43a. , 44a to adjust the mounting angle of the slide bearing casing 45, then tighten the cap screw 55 and lock the screw 55 with the lock nut 56.

The number of rotations transmitted from the input shaft 31 to the output shaft 38 is the diameter of the circle of the cross section perpendicular to the axis at the common contact point of the small taper roller 36 and the large taper roller 41, respectively d ₁ ,
Assuming d ₂ , the large taper roller 41 rotates n × d ₁ / d ₂ while the small taper roller 36 rotates n times. Therefore,
The reduction ratio of this device is d ₁ / d ₂ .

[0031]

In the combination of the small taper roller and the large taper roller which are orthogonal to each other, the angular position of the input or output shaft bearing housing is adjusted even if there is an error in processing or assembly in each part. The taper can be fitted exactly. Adjust the angular position of the input or output shaft bearing housing by placing a preload from the input or output shaft side even when the taper roller or the output or input shaft bends due to power transmission load and both taper rollers do not taper This makes it possible to match the generatrixes of both taper rollers when loaded. Therefore, stable power transmission is performed and durability is improved. When the taper roller is worn as a result of long-time load operation, the power transmission capability can be restored by pushing the input or output shaft bearing housing in the axial direction. In addition, since there is no extra rotating portion, power loss is reduced, the number of parts is small, and the tolerance of machining accuracy such as taper of the taper roller can be loosened, so that the product cost can be reduced.

[Brief description of drawings]

FIG. 1 is a sectional view of an orthogonal rolling transmission device according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along the line AA of FIG.

FIG. 3 is a sectional view taken along line BB of FIG.

4 is another example of fixing the small diameter taper roller shaft shown in the cross-sectional view taken along the line BB of FIG.

FIG. 5 is a cross-sectional view showing a conventional orthogonal rolling transmission device.

[Explanation of symbols]

 31 Input Shaft 35 Housing 36 Small Diameter Tapered Roller 38 Output Shaft 41 Large Diameter Tapered Roller 43 Lower Housing 44 Upper Housing 45 Slide Bearing Enclosure 49 Shim 51 Tightening Bolt 52 Adjusting Screw 54 Pushing Bolt 55 Holding Screw

Claims (2)

[Claims] 1. An input or output shaft, which is rotatably supported by a bearing housing which is fitted in a housing and whose axial position can be adjusted, and a taper roller of a small diameter is integrally formed at the tip thereof, and a front portion of the housing. Orthogonal type that is rotatably supported orthogonally to the input or output shaft, and is composed of an output or input shaft in which the small-diameter taper roller and the large-diameter taper roller that is in pressure contact with the taper portion busbar are integrally fixed. In the rolling transmission device, the bearing housing of the input or output shaft, which is provided with a symmetric parallel flat surface with respect to the axis center line, and the surface including the central axis lines of the input shaft and the output shaft are divided into two and are parallel symmetric with respect to the divided surface. And a housing provided with a mounting hole having a flat surface for tightening a parallel surface of the bearing housing, and the bearing housing for the input or output shaft is inserted or output on a plane including the axis of the input shaft and the output shaft. Of the axis By adjusting the axial position and the angle of the input or output shaft, it is possible to adjust so that the taper buss of the small diameter taper roller and the large diameter taper roller are in full contact and have an appropriate pressure contact force. Characteristic orthogonal rolling transmission device. 2. A vertical screw hole penetrating to the outside is made at a position where the housing is tightened to fix the input or output shaft bearing housing, and a push screw is screwed into this to form a fixing means after the bearing housing is tapered. The orthogonal rolling transmission device according to claim 1.