JP3936163B2 - Oil supply structure for orthogonal gear reducer - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an oil supply structure for an orthogonal gear reducer, and more particularly to an oil supply structure for lubricating a bearing of a rotary shaft incorporated in a vertical direction.
[0002]
[Prior art]
Gear reducers that are attached to motors and used as so-called geared motors include those in which the axis directions of the motor shaft (input shaft) and output shaft are parallel, and those in which the axis directions of the input shaft and output shaft are orthogonal, An orthogonal gear reducer in which an output shaft is orthogonal to an input shaft is widely used from the viewpoint of a high degree of freedom in arrangement and the like.
[0003]
An example of the structure of a conventional orthogonal gear reducer is shown in FIGS. 6 is a cross-sectional view taken along line VI-VI in FIG.
[0004]
The speed reducer includes an input shaft 100 that is connected to a motor shaft of a motor (not shown) and is arranged in the horizontal direction, and an output shaft 101 whose axis is orthogonal to the input shaft 100 (incorporated in the vertical direction). . An intermediate shaft 102 is disposed between the input shaft 100 and the output shaft 101 in parallel with the output shaft 101, and a bevel pinion 103 integrally formed with the input shaft 100 and a bevel gear 104 attached to the intermediate shaft 102 are engaged with each other. At the same time, the intermediate gear 105 attached to the intermediate shaft 102 and the output gear 106 attached to the output shaft 101 are engaged with each other. As a result, the rotation of the motor shaft is decelerated and the direction thereof is changed to a right angle and transmitted to the output shaft 101.
[0005]
These shafts and gears are housed in a gear box composed of an upper case 107 and a lower case 108 except for the input side end of the input shaft 100 and the output side end of the output shaft 101. Each shaft is supported by bearings 110 to 115.
[0006]
A disk-shaped oil splasher 116 used for splashing the lubricating oil contained in the gear box is attached to the input shaft 100 at a position between the bevel pinion 103 and the bearing 111. A rectangular opening (oil receiving hole) 117 is formed in the upper case 107 at a portion directly above the oil splasher 116.
[0007]
Further, an opening cover 120 and bearing covers 121 and 122 are respectively covered on the upper part of the opening 117 and the upper part of the bearing 112 of the intermediate shaft 102 and the bearing 114 of the output shaft 101.
[0008]
In the upper case 107, an oil passage (oil groove) 118 is formed in the upper case itself from the opening 117 to the bearing 114 of the output shaft 101 via the bearing 112 side of the intermediate shaft 102. A part of the oil passage 118 has a tunnel structure.
[0009]
As the input shaft 100 rotates, the oil splasher 116 splashes the lubricating oil from the lower case 108, and the splashed oil passes through the opening 117 and further through the oil passage 118 and the bearing 112 of the intermediate shaft 102 and the output shaft 101. The bearing 114 is lubricated. The oil after lubricating the bearing 114 drips into the lower case 108. Thick line arrows in FIG. 7 indicate the flow of oil.
[0010]
[Problems to be solved by the invention]
However, the conventional orthogonal gear reducer having such a configuration employs an oil supply structure that requires special processing, such as the need to penetrate a tunnel for forming an oil passage in the upper case 107. The gearbox had to be dedicated, and the cost was high.
[0011]
Further, the gear box of the conventional orthogonal gear reducer does not consider the relationship with the gear box of the parallel shaft type reducer, and both are completely different gear boxes.
[0012]
The present invention has been made in view of such a conventional problem, and is an oil supply for an orthogonal gear reducer that has a simple structure, can be used in common, and can realize cost reduction. Its purpose is to provide a structure.
[0013]
[Means for Solving the Problems]
The present invention includes at least a rotating shaft incorporated in the case in the vertical direction and a rotating shaft incorporated in the horizontal direction, respectively, and an oil sprocket for splashing oil onto the horizontally installed rotating shaft. A lasher was incorporated, and the case had an oil receiving hole for passing the oil splashed up by the oil splasher to the upper surface side of the case, and the case was splashed up to the upper surface side of the case through the oil receiving hole. in at least one oil supply structure of the orthogonal gear reducer is supplied to the bearing of the rotary shaft incorporated oil in the vertical direction within the case, as the受油hole, can be inserted the rotating shaft to be incorporated in a vertical direction utilizing a bearing hole, over at least comprising range and said bearing and said受油hole, mounting a cover for covering a state that share a single space on the upper surface of the case, and the cover The space that is shared between the over scan the upper surface side, by the splashed oil through the 受油 hole was space for leading up to the bearing is obtained by solving the above problems.
[0014]
In the present invention, conventionally, the cover that individually covers the oil receiving hole (opening portion of the upper case) and the bearings of the respective vertical shafts, or the bearing cover is collected as one common large cover, This common (large) cover was placed on the upper surface side of the case leaving a space. As a result, not only can the number of parts be reduced, but the space between the common cover and the case can be used as a space for guiding oil. The need to form complicated oil passages in the case has been eliminated and the case can be simplified.
[0015]
In the present invention, further, as受油hole of the case, the bearing hole of the parallel shaft is not used, i.e., because it uses the insertable bearing bore the rotation axis to be incorporated in the vertical direction, for example, as the case In this case, a reduction gear case in which all the shafts in the case are parallel can be used, and the bearing hole of the shaft not used can be used as the oil receiving hole.
[0016]
That is, for example, in the case of a parallel shaft gear reducer as shown in FIG. 8, there are three bearing holes on the upper surface. Since the oil supply structure according to the present invention uses a common bearing cover, the case of the parallel shaft gear reducer is used, and the unused bearing hole of the three is used as the oil receiving hole according to the present invention. be able to. As a result, it is not necessary to have a gear box dedicated to the orthogonal gear reducer, and the inventory cost can be greatly reduced. However, in the present invention, it is not an essential requirement to divert a gear box for a parallel shaft gear reducer according to an existing design, and it is prohibited to use a gear box dedicated to an orthogonal gear reducer. It is not a thing. That is , if there is a parallel shaft bearing hole that is not used in the gear box dedicated to the orthogonal gear reducer, this may be used as the oil receiving hole.
[0017]
In another preferred embodiment of the present invention, a deflecting member that guides and drops the oil splashed up through the oil receiving hole to a portion directly above the oil receiving hole on the inner surface of the cover. Is to attach.
[0018]
Further, according to the present invention, since the space between the case and the common cover is used as a space for guiding oil, the conventional oil passage is not necessarily required, but more efficiently in the bearing portion. For example, it is not prohibited to form a guide path for guiding the oil splashed up through the oil receiving hole to the bearing in the space between the cover and the case upper surface side. .
[0019]
The guide path may be formed by, for example, a guide plate suspended from the cover, or may be formed by a guide plate attached to the upper surface of the case. In either case, the oil passage can be formed much more easily than in the case of forming an oil passage that forms a conventional tunnel.
[0020]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an example of an embodiment of the present invention will be described in detail based on the drawings.
[0021]
In the following description, the same or similar parts as those in the conventional example shown in FIG. 1 are given the same reference numerals as in the conventional part, with the same reference numerals assigned to the last two digits. explain. Further, the reduction gear of the illustrated embodiment is of a bevel gear type, but the present invention can also be implemented using a hypoid gear, and is not limited to the two-stage gear type as illustrated, Three or more stages may be used, and various types of orthogonal gear reducers can be implemented.
[0022]
FIG. 1 is a sectional view showing an embodiment of an orthogonal gear reducer according to the present invention, and FIG. 2 is a plan view of the orthogonal gear reducer of FIG. 1 is a cross-sectional view taken along the line II of FIG.
[0023]
The basic power transmission structure of this orthogonal gear reducer is substantially the same as the conventional one shown in FIGS. That is, the speed reducer is connected to a motor shaft of a motor (not shown), and an input shaft 300 arranged in the horizontal direction, and an output shaft 301 whose axis is orthogonal to the input shaft 300 (incorporated in the vertical direction). Is provided.
[0024]
An intermediate shaft 302 is disposed between the input shaft 300 and the output shaft 301 in parallel with the output shaft 301, and a bevel pinion 303 formed integrally with the input shaft 300 and a bevel gear 304 attached to the intermediate shaft 302 are engaged with each other. At the same time, the intermediate gear 305 attached to the intermediate shaft 302 and the output gear 306 attached to the output shaft 301 are engaged with each other. As a result, the rotation of the motor shaft is decelerated and its direction is changed to a right angle and transmitted to the output gear 301.
[0025]
These shafts and gears are housed in a gear box R (for a parallel shaft gear reducer) composed of an upper case 307 and a lower case 308. Each shaft is supported by bearings 310 to 315. Among these, in particular, the bearings 312 and 314 are lubricated by the oil supply structure to which the present invention is applied.
[0026]
Between the bevel pinion 303 of the input shaft 300 and the bearing 311, a disk-shaped oil splasher 316 used for splashing the lubricating oil accommodated in the gear box R is attached. As shown in detail in FIG. 3, the oil splasher 316 has a blade 323 formed by cutting and raising the periphery of a disk-shaped member at a plurality of locations (six locations in the illustrated example). Oil is splashed up toward the oil receiving hole 317 by these blades 323.
[0027]
A bearing hole 321 for use as a parallel shaft gear reducer, which will be described later, is formed in the upper case 307 at a position directly above the oil splasher 316 (the same as the bearing hole 221 in FIG. 8).
[0028]
The bearing hole 321 efficiently receives the oil splashed from the oil splasher 316 so that the bearing hole 321 functions efficiently as the oil receiving hole 317, and the oil that has jumped up is again received by the oil receiving hole. A throttle member 324 is provided so as not to be dropped from 317 as it is.
[0029]
The throttle member 324 includes a disk portion 317A for closing most of the circular bearing hole 321 and a rectangular standing portion 317B raised from the center thereof. The opening of the standing portion 317B is a substantial oil receiving hole 317.
[0030]
Further, a deflection member 326 that guides and drops the oil splashed through the oil receiving hole 317 on the inner surface of the cover 325 to be described below to the outer periphery of the oil receiving hole 317 is provided immediately above the throttle member 324. It is attached. As shown in FIG. 5, the deflecting member 326 has a mountain-shaped cross-sectional shape in which the lower jaw is widened, and an elongated opening 326 </ b> B through which oil passes is formed in the slope portion 326 </ b> A. 5 is a bolt hole for attaching the deflection member 326 to the inner surface of the cover 325.
[0031]
Here, the oil receiving hole 317, the bearing 312 of the intermediate shaft 302, and the upper part of the output shaft 301 314 are covered so as to share a single space S on the upper surface side of the upper case 307 over a range including all of these. The cover 325 is attached. The cover 325 is detachably attached by a bolt 330 or the like so that it can be removed. A space S shared between the cover 325 and the upper surface side of the upper case 307 functions as a space for guiding the oil raised through the oil receiving hole 317 to the bearing.
[0032]
In the figure, reference numerals 328 and 329 denote oil guide plates attached to the upper surface of the upper case 307, which are provided at portions corresponding to the bearing 312 of the intermediate shaft 302 and the bearing 314 of the output shaft 301. By forming 328A and 329A, the notches 328A and 329A function as oil guide paths. The oil is efficiently guided to the bearings 312 and 314 by the notches 328A and 329A.
[0033]
However, the formation of the guide path is not necessarily essential for the present invention, and the configuration thereof is not limited to this. For example, an upper part of the upper case may be formed to be slightly thick, and a groove may be directly formed there, or a guide plate or the like may be suspended from the cover 325. In any case, it is possible to form the guide path very easily as compared with a structure in which a conventional tunnel is formed.
[0034]
For reference, FIG. 8 shows a parallel shaft type gear reducer diverted in this embodiment (adding 100 to the reference numerals of elements corresponding to the orthogonal gear reducer in FIGS. The last two digits are given the same number.) In the case of a parallel shaft type reduction gear, even if an oil splasher is attached to the input shaft 200, the oil splashing direction or the direction of the bearings 210 to 215 to be lubricated is not directed. Generally, it is provided to supply lubricating oil.
[0035]
Next, the operation will be described.
[0036]
As the input shaft 300 rotates, the oil splasher 316 splashes the lubricating oil from the lower case 308, and the splashed oil passes through the oil receiving hole 317 and its direction is changed by the deflecting member 326. Falls into the space part S.
[0037]
The oil dropped into the space S further lubricates the bearing 312 of the intermediate shaft 302 and the bearing 314 of the output shaft 301 through the notches 328A and 329A. The oils after lubricating the bearings 312 and 314 are dropped into the lower case 308, respectively. The thick line arrow in FIG. 2 shows the flow of oil.
[0038]
In addition, by adjusting the shape of the notch portions of the guide plates 328 and 329, for example, it is possible to control so that more oil flows into the intended bearing.
[0039]
【The invention's effect】
As described above, according to the present invention, it is possible to supply oil to the bearing with an extremely simple configuration, and an excellent effect is obtained in that parts can be shared and the cost can be reduced accordingly. It is done. Further, if necessary, the gear box can be used for the parallel shaft gear reducer, and the versatility of the gear box can be improved.
[Brief description of the drawings]
1 is a cross-sectional view showing an embodiment of an orthogonal gear reducer according to the present invention. FIG. 2 is a plan view of the orthogonal gear reducer of FIG. 1. FIG. 3 is an oil splasher used in the orthogonal gear reducer of FIG. FIG. 4 is a front view of a throttle member used in the orthogonal gear reducer of FIG. 1. FIG. 5 is a perspective view of a deflection member used in the orthogonal gear reducer of FIG. Sectional view [Fig. 7] Plan view of a conventional orthogonal gear reducer [Fig. 8] Cross-sectional view of a parallel shaft gear reducer used in the above embodiment [Explanation of symbols]
DESCRIPTION OF SYMBOLS 300 ... Input shaft 301 ... Output shaft 302 ... Intermediate shaft 303 ... Bevel pinion 304 ... Bevel gear 305 ... Intermediate gear 306 ... Output gear 307 ... Upper case 308 ... Lower case 310-315 ... Bearing 316 ... Oil splasher 317 ... Oil receiving hole 323 ... Oil splasher blade 324 ... Diaphragm member 325 ... Cover 326 ... Deflection member 327 ... Deflection member opening 328, 329 ... Oil guide plate

Claims (4)

The case has at least a rotary shaft built in the vertical direction and a rotary shaft built in the horizontal direction, and an oil splasher for splashing oil is built in the rotary shaft built in the horizontal direction. The case has an oil receiving hole for allowing the oil splashed up by the oil splasher to pass to the upper surface side of the case, and the oil splashed up to the upper surface side of the case through the oil receiving hole is supplied to the case In the oil supply structure of the orthogonal gear reducer for supplying to at least one bearing of the rotating shaft incorporated in the vertical direction,
As the oil receiving hole, using a bearing hole through which a rotating shaft to be incorporated in the vertical direction can be inserted,
Over at least comprising range and said bearing and said受油hole, mounting a cover for covering a state that share a single space on the upper surface of the case,
The space shared between the cover and the upper surface of the case is used as a space for guiding the oil splashed up through the oil receiving hole to the bearing. Supply structure. In claim 1 ,
An oil supply structure for an orthogonal gear reducer characterized in that as the case, a case of a reducer in which all the shafts in the case are parallel is diverted, and a bearing hole of an unused shaft is used as the oil receiving hole. . Oite to claim 1 or 2,
The oil receiving hole is provided with a throttle member that includes a disk portion that closes most of the oil receiving hole, and a standing portion that is raised from the center of the oil receiving hole and has a substantial oil receiving hole opened. oil supply structure of the orthogonal gear reducer, characterized in that are. In any one of Claims 1-3 ,
An oil supply structure for an orthogonal gear reducer, wherein a guide path that guides the oil splashed up through the oil receiving hole to the bearing is formed in a space between the cover and the upper surface of the case.

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