JP5072654B2 - Planetary roller speed reducer - Google Patents

Description

  The present invention relates to a planetary roller speed reduction device in which each of a sun roller, an inner roller whose rotational direction is constrained by a casing, and a plurality of planetary rollers is circumscribed and inscribed in a preload state, and in particular during load rotation The present invention relates to a structure for preventing rotation of an inner roller following the deformation of the inner roller, and a structure for preventing side-sliding wear of the inner roller accompanying the deformation.

  The conventional planetary roller friction transmission device proposed in Patent Document 1 aims at a simple configuration with a small number of parts, and has an inner roller formed inside the casing, and an elastic material is attached to the mounting portion of the casing and peripheral parts. A sun roller, a planetary roller, and a casing are combined with an inner roller integrated with a plate or the like to cover deformation (distortion) of the inner roller when a driving force is applied.

  A conventional planetary roller friction transmission device proposed in Patent Document 2 includes a fixed wheel that is concentrically fixed to an input shaft, and each planetary roller is interposed between the input shaft and an axial direction restricting means for the planetary roller. The side plates attached to both sides of the fixed ring are treated with a surface treatment with good friction and wear characteristics on the side facing the planetary roller of the same side plate to prevent a decrease in transmission efficiency, and the side and casing of the planetary roller The aim is to prevent wear and damage to the inner surface of the machine.

The conventional planetary roller friction transmission device proposed in Patent Document 3 relates to a vertical planetary roller speed reducer used for driving the vertical axis of a fully automatic washing machine that requires quietness, and an inner roller is fixed to a casing. Further, the rotational direction is restricted by a plurality of pins, and the inner roller is a vertical axis planetary roller speed reducer having a configuration in which the inner roller is sandwiched between a casing and a side cover to allow a slight radial movement of the inner roller.
Japanese Patent Laid-Open No. 4-272550 (FIG. 4) JP-A-9-229151 (FIG. 1) Japanese Unexamined Patent Publication No. 2000-51568 (FIGS. 1 and 3)

  The conventional planetary roller friction transmission device presented in Patent Document 1 has a simple configuration and is combined with a sun roller, a planetary roller and an inner roller integrated with the casing with a plate made of an elastic material sandwiched between them, Covers deformation (distortion) of the inner roller when a driving force is applied, but the casing has a large and complex shape, so the inner roller integrated with the casing is surface treated and treated for curing. Subsequent high-accuracy machining or the like becomes difficult, and the machining cost may be increased.

  Further, the conventional planetary roller friction transmission device proposed in Patent Document 2 is fixed concentrically with the input shaft, and each planetary roller is interposed between the input shaft and the axial direction of the planetary roller. It consists of side plates attached to both sides of the fixed ring as a restricting means, and wear resistant surface treatment is applied to the side surface facing the planetary roller of the same side plate to prevent side wear of the planetary roller. If the roller is supported by a rolling bearing that can also support the thrust direction, this can be solved easily and it cannot be said that it is new.

  In addition, the conventional planetary roller friction transmission device proposed in Patent Document 3 is a vertical speed reducer, and therefore the planetary roller mounting method has a structure that supports the weight in the axial direction, and is used for the horizontal axis. There is a risk of slipping out of the bearing, and there is a problem that the transmission efficiency is deteriorated because the side surface of the planetary roller is rubbed against the side cover of the casing.

  The present invention solves the problems in the conventional planetary roller speed reducer, and is a planetary roller that reduces transmission friction loss as a general-purpose speed reducer and reduces or eliminates sliding wear due to deformation of the inner roller during driving rotation. The aim is to provide a reduction gear.

With respect to the above problems, the present invention aims to solve the problems by the following means.
(1) The planetary roller speed reducer of the first means rolls on a sun roller integral with the input shaft, an inner roller sandwiched on both sides of the casing, and a carrier pin fixed to a carrier integral with the output shaft. A planetary roller speed reducer comprising a plurality of planetary rollers rotatably supported via bearings, each of which is circumscribed and inscribed in a preload state, on one or both sides of the casing, each of the inner rollers A plurality of holes arranged opposite to each other are provided, and a plurality of locking pins are inserted into the holes to prevent rotation of the inner roller. The locking pins are aligned with the inner roller, from one side or both sides of the inner roller. The protruding part is provided with two parallel flat surfaces having a width smaller than the diameter of the locking pin, and the hole provided in the casing is a barrel-shaped long hole having the same width as the two parallel flat surfaces of the locking pin. The parallel surface of the long hole Characterized in that provided so as to face the radial direction.

(2) The planetary roller reduction device of the second means rolls on a sun roller integral with the input shaft, an inner roller sandwiched on both sides of the casing, and a carrier pin fixed to a carrier integral with the output shaft. A planetary roller speed reducer comprising a plurality of planetary rollers rotatably supported via bearings, each of which is circumscribed and inscribed in a preload state, on one or both sides of the casing, each of the inner rollers A plurality of holes arranged opposite to each other are provided, and a plurality of locking pins are inserted into the holes to prevent rotation of the inner roller. The locking pins align with the inner roller and protrude from one side or both sides of the inner roller. Two parallel planes with a narrower width than the diameter of the detent pin are provided in the part, and the hole provided in the casing is provided with a circular hole having a diameter larger than the diameter of the detent pin, Each gap between the two planes and the circular hole, characterized in that the crescent-shaped slider is provided.

(3) The planetary roller speed reduction device of the third means rolls on a sun roller integral with the input shaft, an inner roller sandwiched on both sides of the casing, and a carrier pin fixed to a carrier integral with the output shaft. A planetary roller speed reducer comprising a plurality of planetary rollers rotatably supported via bearings, each of which is circumscribed and inscribed in a preload state, on one or both sides of the casing, each of the inner rollers A plurality of holes arranged opposite to each other are provided, and a plurality of locking pins are inserted into the holes to prevent rotation of the inner roller, and are provided symmetrically at the same radial position on the inner roller and the inner roller mounting surface of the casing. Two planes parallel to the cylindrical head protruding from one side of the inner roller and the casing are formed or aligned with each pair of holes, and the plane of the cylindrical head is a radial direction of the inner roller. The inner roller has four elongated holes having a parallel part longer than the detent pin and having the same width as the parallel part at the tip of the detent pin. The protruding portion of the non-rotating pin of the inner roller and the protruding portion of the non-rotating pin of the casing are alternately inserted into the four elongated holes at the same radius and 90 ° angular position. Features.

(4) The planetary roller speed reducing device of the fourth means is the planetary roller speed reducing device according to any one of the above (1) to (3), wherein a ring plate sandwiched between the casing and the inner roller is provided.

(5) The planetary roller speed reduction device of the fifth means is the planetary roller speed reduction device of (4), wherein the surface of the two ring plates sandwiched between the casing and the inner roller is plated with titanium or hard chrome. Or coating with self-lubricating fluorine or molybdenum sulfide, or shot peening the ring plate surface, or using a lubricant impregnated sintered metal material for the ring plate material It is characterized by.

(6) The planetary roller speed reducer of the sixth means is the planetary roller speed reducer according to (1) to (5) above, wherein a lubricating oil pool chamber is provided at the lowest position of the casing, and the nonmagnetic support base Is installed apart from the casing, and a magnet is attached to the support base.

The invention according to claims 1 to 3 is the planetary roller speed reducer of the first to third means, wherein the speed reducer provides play (escape) against slight deformation in the radial direction of the inner roller during load driving. As a result, unnecessary force is not applied to the inner roller and the non-rotating pin, and there is an effect that wear is reduced and durability is improved. In particular, the non- rotating pin mechanism of the second and third means is designed so that unnecessary force is not applied to the remarkable deformation in the radial direction when an inner roller having excellent elasticity is used. Even when the friction surface of the roller is worn, the driving performance can be maintained, and the durability can be improved.

In addition, since the non-rotating pin mechanism of the third means has a universal joint function, the inner roller can be self-aligned, and it is not necessary to accurately center the inner roller, making assembly easier. Become.

According to a fourth aspect of the present invention, there is provided a planetary roller speed reducing device according to the fourth means, wherein a ring plate is interposed between the casing and the inner roller to sandwich the casing and the inner roller against fine movement of the inner roller. The effect of preventing the wear of is obtained.

The invention according to claim 5 is the planetary roller speed reducing device of the fifth means, which has the effect of preventing fretting wear (fine motion wear) when the inner roller is fibrillated, and in particular, the speed reducing device is used on the vertical axis. Greater effect is seen when doing.
The invention according to claim 6 is the planetary roller speed reducing device of the sixth means, which removes the wear iron powder caused by rolling of each roller and rolling bearing, reduces the wear of each component, and increases the durability. There is.

(First reference example )
The configuration of this reference example will be described with reference to the drawings. FIG. 1 is a side sectional view of a planetary roller speed reducer according to this reference example , FIG. 2 is an enlarged view of a portion A in FIG. 1, an inner roller detent mechanism (I) 20, and FIG. It is.

  In the figure, a planetary roller speed reducer 10 includes a sun roller 2a that is integral with the input shaft 2, an inner roller 4 that is sandwiched and fixed by a casing 11 and a casing lid 12 via ring plates 15 and 16, and an output. A plurality of planetary rollers 3 are rotatably supported on a carrier pin 6 fixed to a carrier 5a integrated with the shaft 5 via rolling bearings 7 and 7, and each roller 2a, 4 and 3 is preloaded. It is circumscribed and inscribed in the state.

The inner roller detent mechanism (I) 20 will be described. A plurality of holes 4 a, 15 a, 11 a are arranged opposite to each other at the same angular position of the same diameter on each of the ring plate 15 (or the ring plates 15, 16 on both sides) sandwiched between the casing 11 and the casing lid 12 and the inner roller 4. A plurality of locking pins 17 are inserted into the holes 4a, 15a, and 11a so that the casing 11 and the ring plate 15 are aligned, and the inner roller 4 is loosely coupled (or the casing and the ring plate are loosely It may be aligned with the ring) to prevent rotation of the inner roller 4, and the planetary roller speed reducer 10 is provided with a play that can cope with slight deformation in the radial direction of the inner roller 4 during load driving.
The “alignment” refers to a state in which they are fitted and fixed relative to each other without a gap, and the “play” refers to a state in which they are fitted so as to be relatively rotatable while having a gap.

  In FIG. 2, the detent pin 17 is inserted into the holes 15a and 11a provided in the ring plate 15 and the casing 11, but these holes are provided in the ring plate 16 and the casing lid 12, and the casing lid 12 side. Further, it may be inserted into the casing 11 or may be supported by both the casing 11 and the casing lid 12.

  The output shaft 5 is positioned and supported by the casing 11 and the bearing cover 18, and the input shaft 2 is positioned and supported by the casing lid 12 and the carrier 5a. An appropriate amount of lubricating oil is stored in a room surrounded by the casing 11 and the casing lid 12. Both the input shaft 2 and the output shaft 5 are sealed with lubricating oil inside and outside the casings 11 and 12 by oil seals provided on the casing 11 and the casing lid 12.

  A recess 12a for storing lubricating oil is provided in the lower part of the casing lid 12, and the magnetic body 42 is separated from the casing lid 12 and the ring plate 16 by a non-magnetic metal bolt 41 so as to avoid the influence of the magnetizing force. Fixed. Wear iron powder generated when the planetary roller 3 is driven by the inner roller 4 and the sun roller 2 a is adsorbed by the magnetic body 42.

  The operation of the planetary roller speed reducer 10 will be described. In FIG. 3, when the inner roller 4 is fixed and the planetary roller 3 is circumscribed and inscribed with the inner roller 4 and the sun roller 2a in a preloaded state and the input shaft 2 is rotationally driven, the carrier 5a that supports the planetary roller 3 is supported. Is rotated, the output shaft 5 is decelerated and driven, and if the diameter of the sun roller 2a is a and the diameter of the planetary roller 3 is b, the reduction ratio is known to be a / (a + 2b). If the output shaft 5 is used as an input shaft and the input shaft 2 is used as an output shaft, a speed increaser can be obtained. d indicates the inner diameter of the inner roller 4.

  If the inner roller 4 is an elastic body having high rigidity, when the planetary roller 3 is circumscribed and inscribed with the inner roller 4 and the sun roller 2a in a preload state, the deformation amount of the inner roller 4 (indicated by s in FIG. 3). ) Is slight. Further, when the inner roller 4 is an elastic body having a small rigidity, the deformation amount s of the inner roller becomes a significant dimension. Assuming that the inner roller 4 provided in the planetary roller speed reducer 10 of the present embodiment is an elastic body having a large rigidity, the deformation amount s can be covered by the non-rotating pin 17 and the inner roller 4 with a loose clearance. A roller detent mechanism (I) 20 is employed.

  In the planetary roller speed reducer 10, since the lubricating oil is difficult to reach the upper part, the surfaces of the two ring plates 15 and 16 sandwiched between the casing 11 and the inner roller 4 so as not to cause fretting wear (fine wear). Is coated with titanium, hard chrome, etc., self-lubricating fluorine or molybdenum sulfide is coated, or the surfaces of the ring plates 15 and 16 are shot peened, or the ring Wear resistance can be imparted by using a lubricant-impregnated sintered metal material as the material of the plates 15 and 16.

(Second reference example )
A second reference example will be described with reference to the drawings. FIG. 4 is an enlarged cross-sectional view showing an inner roller detent mechanism (II) 30 (corresponding to part A of FIG. 1) of the planetary roller speed reducer according to the second reference example . Since the roller detent mechanism (II) of 30 except for the configuration among shown in FIG. 4 is similar to the planetary roller reducer 10 of the first reference example, decide to see also Figure 1 and Figure 3, the first reference The description of the same components and the same operation as the example is omitted.

  In the figure, the inner roller anti-rotation mechanism (II) 30 is provided with a plurality of holes 11 a, 15 a, 14 a disposed facing the ring plate 15 and the inner roller 14 on one side of the casing 11. The hole 14a has a larger diameter than the holes 11a and 15a and is fitted with the cushioning material bush 28. The hole 28a of the cushioning material bush 28, the hole 11a of the casing 11 and the hole 15a of the ring plate 15 are provided with a rotation prevention pin 27. Rotation pins 27 having the same number as the number of holes are inserted into the holes 11a of the casing 11 and the holes 15a of the ring plate 15 and the holes 28a of the cushioning material bush 28 attached to the holes 14a of the inner roller 14. This is the configuration.

  Similarly to the case shown in FIG. 3, when the inner roller 14 being driven by the planetary roller speed reducer 10 is deformed in the radial direction (deformation amount s), the inner roller 14 has sufficient rigidity and is slightly deformed. However, when the necessary pre-pressure is applied to each of the rollers 2a, 3 and 14, the shock-absorbing material bush 28 is deformed and the detent pin 27 slightly moves in the radial direction to avoid a strong contact with the inner roller 14. The reaction force in the rotation direction of the inner roller 14 can be sufficiently absorbed by the side surface of the cushioning material bush 28.

  In FIG. 4, an example in which the rotation prevention pin 27 uses the ring plate 15 on one side of the casing 11 is described. However, a hole having the same shape as the hole 15 a of the ring plate 15 is provided in the ring plate 16 and the casing lid 12. The anti-rotation pin 27 may be inserted into the anti-rotation pin 27. Alternatively, the anti-rotation pin 27 may be extended to both sides and supported on both sides by the ring plates 15 and 16 on both sides, the casing 11, and the casing lid 12.

(First Embodiment)
A first embodiment will be described with reference to the drawings. FIG. 5 is an enlarged cross-sectional view showing an inner roller detent mechanism (III) 40 (corresponding to part A of FIG. 1) of the planetary roller speed reducer according to the first embodiment, and FIG. 6 is a cross-sectional view of FIG. It is sectional drawing. Since the configuration other than the inner roller detent mechanism (III) 40 shown in FIGS. 5 and 6 is the same as that of the planetary roller speed reducer 10 of the first reference example , reference is also made to FIGS. 1 and 3. The description of the same components and the same operations as those in the first reference example will be omitted.

  In the figure, the inner roller detent mechanism (III) 40 is provided with a hole 4a for inserting a pair of detent pins 37 in the inner roller 4 at a symmetrical position in the center of the inner roller 4. 4, and a projecting portion 37 a protruding from one side of the inner roller 4 of the pin 37 is provided with two parallel planes 37 b narrower than the diameter of the pin 37, and the casing 11 and the ring plate 35. The barrel-shaped long holes 35a and 11b, which are disposed opposite to the projecting portion 37a and have the same width and length as the two flat surfaces 37b of the rotation-preventing pin 37, are longer than the diameter of the pin 37 so that the parallel plane faces the radial direction. It is the structure provided.

  When the roller 4, the non-rotating pin 37 and the ring plate 35 are combined and incorporated into the casing 11 and driven at a reduced speed, the protruding portion 37 a of the non-rotating pin 37 is inserted into the long hole 11 b of the casing 11 and the long hole 35 a of the ring plate 35. The inner roller 4 is inserted and acts as a detent in the rotational direction of the inner roller 4, and at the same time, following the deformation of the inner roller 4 in the radial direction, the inner hole 4 can be moved in the radial direction in the long hole 11 b and the long hole 35 a.

  As the inner roller detent mechanism (III) 40, the inner roller 4 having excellent elasticity is used. Even when the inner roller 4 is significantly deformed in the radial direction during the driving operation, the detent pin 37 is used. The protruding portion 37a can move in the long hole 11b and the long hole 35a to cope with deformation, and the outer periphery of the inner roller 4 is not restrained away from the casing 11, and a pair of detents are provided at symmetrical positions. Since it is supported by the pins 37 and 37, it is automatically aligned by the pre-pressure of each roller 2a, 3 and 4, and it is possible to maintain the driving performance even if the inner friction surface of the inner roller 4 is worn. And durability can be improved.

  5 and 6, an example in which the non-rotating pin 37 uses one side of the casing 11 and the ring plate 35 on one side is described. However, the long hole having the same shape as the barrel-shaped long hole 35a is provided with the ring plate 16 and the casing. It may be provided on the lid 12 and the protruding portion 37a of the locking pin 37 may be protruded toward the casing lid 12 on the opposite side. Further, the projecting portion 37a of the detent pin 37 may be extended to both sides, and the both sides may be supported by the ring plates 35, 16 on both sides, the casing 11, and the casing lid 12.

(Second Embodiment)
A second embodiment will be described with reference to the drawings. This embodiment has the same basic structure as the first embodiment, and is configured to facilitate the adjustment of the center position of the inner roller. FIG. 7 is an enlarged cross-sectional view showing an inner roller detent mechanism (IV) 50 (corresponding to part A of FIG. 1) of the planetary roller speed reducer according to the second embodiment, and FIG. 8 is a DD of FIG. FIG. 9 is a perspective view showing the half-moon shaped slider of FIG.

Since the configuration other than the inner roller detent mechanism (IV) 50 shown in FIGS. 7 to 9 is the same as that of the planetary roller speed reducer of the first reference example , FIG. 1 and FIG. 3 are also referred to. The description of the same components and the same operations as those in the first reference example is omitted.

  In the figure, the inner roller detent mechanism (IV) 50 is provided with a hole 4 a for inserting a pair of detent pins 47 in the inner roller 4 at a symmetrical position in the center of the inner roller 4. The detent pin 47 attached to the hole 4a of the inner roller 4 protrudes from one side of the inner roller 4 to be shorter than the thickness of the ring plate 45, and has two parallel planes 47b and 47b having a width narrower than the diameter of the pin 47. Are fixedly attached so that the parallel plane faces the radial direction.

  The ring plate 45 is provided with a pair of circular holes 45a having a diameter larger than the diameter of the anti-rotation pin 47 at the same radial symmetry position as the anti-rotation pin 47 inserted into the inner roller 4 so as to face the protruding portion 47a. A hole 45b is provided so as to be inserted into a knock pin 32 that is press-fitted and fixed to the casing 11 so that the rotation direction is restricted. A pair of half-moon shaped sliders 31, 31 are provided for each hole 45 b so as to fill a gap between the circular hole 45 a of the ring plate 45 and the two parallel planes 47 b, 47 b of the rotation prevention pin 47.

  When the inner roller 4, the non-rotating pin 47 and the ring plate 45 are assembled into the casing 11 and driven at a reduced speed, the protruding portion 47 a of the non-rotating pin 47 is formed by the sliders 31, 31 in the circular holes 45 a of the ring plate 45. It is inserted so as to be sandwiched between, and following the deformation in the radial direction of the inner roller 4, it can move in the radial direction between the sliders 31, 31 in the circular hole 45a (automatic alignment in this direction is possible). . Further, when adjusting the core of the inner roller 4 in the direction perpendicular to the line connecting the rotation prevention pins 47, 47, the plane side of the slider 31 can be trimmed for fine adjustment.

Since the inner roller detent mechanism (IV) 50 is configured to facilitate the adjustment of the center position of the inner roller 4 as in the first embodiment, the inner roller 4 has excellent elasticity. Even if the inner roller 4 is significantly deformed in the radial direction during the driving operation, the protrusion 47a of the detent pin 47 moves between the half-moon shaped sliders 31, 31 in the circular hole 45a. Further, the outer periphery of the inner roller 4 is not restrained away from the casing 11 and is supported by a pair of detent pins 47, 47 at symmetrical positions, so that each roller 2a, 3, 4, the driving performance can be maintained even when the inner friction surface of the inner roller 4 is worn, and the durability can be expected to be improved.

  7 to 9, an example in which the rotation pin 47 uses one side of the casing 11 and the ring plate 45 on one side is described. However, the ring plate 45 and the half-moon shaped sliders 31 and 31 are provided on the casing lid 12. The protruding portion 47 a of the rotation stop pin 47 may protrude toward the casing lid 12. Further, the projecting portion 47a of the rotation stop pin 47 may be extended to both sides, and the both sides may be supported by the ring plates 45 and 45 on both sides, the casing 11 and the knock pin 32, and the casing lid 12 and the knock pin 32. Moreover, in FIG. 7, the part which should provide the hole (circular hole) in the casing 11 is provided in the ring board 45 as a separate body.

( Third embodiment)
A third embodiment will be described with reference to the drawings. FIG. 10 is a front view showing an inner roller detent mechanism (V1) 60A and an inner roller detent mechanism (V2) 60B (corresponding to the BB cross section of FIG. 1) of the planetary roller speed reducer according to the third embodiment. 11 is a cross-sectional view taken along line EE in FIG. 10, FIG. 12 is a cross-sectional view taken along line FF in FIG. 10, and FIG. 13 is a cross-sectional view taken along line GG in FIGS.

The configuration other than the inner roller detent mechanism (V) 60 shown in FIGS. 10 to 13 is the same as that of the planetary roller speed reducer of the first reference example , so that FIGS. 1 and 3 are also referred to. The description of the same components and the same operations as those in the first reference example is omitted.

  In the figure, a pair of holes 34a are provided symmetrically at the same radial position of the inner roller 34, and two fixing pins 38 are aligned or press-fitted into each of the holes 34a, and also on the side surface of the casing 11 on the inner roller 34 side. A pair of holes 11a are provided symmetrically at the same radial position as the inner roller 34 described above, and two fixing pins 38 are aligned or press-fitted into each of the holes 11a.

  The fixed pin 38 is a pin having a shape in which the inner roller 34 or the portion protruding from the casing 11 has two surfaces parallel to the pin axis by shaving both sides of a cylinder having a diameter larger than the pin diameter. A ring plate 55 is installed between the inner roller 34 and the casing 11. The ring plate 55 is provided with four long holes 55a having the same width as the parallel part at the tip of the fixed pin 38 and having a parallel part longer than the fixed pin 38 so as to face each other at the same radius and 90 degree angle position as the inner roller. is there.

  The fixing pin 38 is fixed to the inner roller 34 with its flat surface 38a facing the radial direction of the inner roller 34, and also fixed to the casing 11 with its flat surface 38a facing the radial direction of the inner roller mounting surface of the casing 11. Is done. The flat surface 38a of the fixing pin 38 on the inner roller 34 side and the flat surface 38a of the fixing pin 38 on the casing 11 side are alternately opposed so as to be inserted into the four long holes 55a of the ring plate 55. Corresponding mechanism.

  When the built-in drive operation is performed in the planetary roller speed reducer 10, the function corresponding to this universal joint enables automatic alignment of the inner roller 34, so that it is not necessary to accurately center the inner roller 34 during assembly. Assembling is easy, and unnecessary force is not applied to the radial deformation of the inner roller 34 having excellent elasticity. Further, even when the friction surface on the inner side of the inner roller 34 is worn, the driving performance can be maintained, and an improvement in durability can be expected.

  10 to 13, an example in which the fixing pin 38 uses one side of the casing 11 and the ring plate 55 on one side is described. However, the ring plate 55 is provided on the casing lid 12 side, and the flat surface 38a of the fixing pin 38 is the casing lid. You may protrude toward the 12th. Moreover, in FIG. 12, the part which should provide the hole (long hole) in the casing 11 is provided in the ring board 55 as another body.

In the first to third embodiments, the ring plate is provided between the inner roller and the casing. However, the present invention is not limited to this, and the ring plate may not be provided. However, it is preferable to dispose the ring plate because the effect of preventing wear of the casing or the inner roller can be obtained against the fine movement of the inner roller.

It is side surface sectional drawing of the planetary roller speed reducer concerning the 1st reference example of this invention. It is the A section enlarged view of FIG. It is BB sectional drawing of FIG. It is an expanded sectional view which shows the inner roller detent | locking mechanism (equivalent to the A section of FIG. 1) of the planetary roller speed reducer concerning the 2nd reference example of this invention. It is an expanded sectional view which shows the inner roller detent mechanism (equivalent to the A section of FIG. 1) of the planetary roller speed reducer concerning the 1st Embodiment of this invention. It is CC sectional drawing of FIG. It is an expanded sectional view which shows the inner-roller detent mechanism (equivalent to the A section of FIG. 1) of the planetary roller speed reducer concerning the 2nd Embodiment of this invention. It is DD sectional drawing of FIG. It is a perspective view which shows the half-moon shaped slider of FIG. It is front sectional drawing which shows the inner roller detent mechanism (equivalent to the BB cross section of FIG. 1) of the planetary roller speed reducer concerning the 3rd Embodiment of this invention. It is EE sectional drawing of FIG. It is FF sectional drawing of FIG. It is GG sectional drawing of FIG.11 and FIG.12.

Explanation of symbols

2 Input shaft 2a Sun roller 3 Planetary roller 4, 14, 34 Inner roller 4a, 11a, 14a, 15a, 28a, 34a Hole 5 Output shaft 5a Carrier 10 Planetary roller speed reducer (Planet roller speed reducer)
11 Casing 35a, 55a Long hole 12 Casing lid (casing)
12a depression (reservoir chamber)
15, 35, 45, 55 Ring plate 16 Ring plate (lid side)
17, 27, 37, 47 Non-rotating pin 20 Inner roller detent mechanism (I)
28 Buffer material bush 30 Inner roller detent mechanism (II)
31 Slider 37a Protruding part (protruding part)
37b, 38a, 47b Plane 38 Fixed pin (non-rotating pin)
40 Inner roller detent mechanism (III)
41 Non-magnetic metal bolt (support)
42 Magnetic body (magnet)
45a Circular hole 47a Protruding part (protruding part)
50 Inner roller detent mechanism (IV)
60A Inner roller detent mechanism (V1)
60B Inner roller detent mechanism (V2)

Claims (6)

A plurality of planetary rollers rotatably supported via rolling bearings on a sun roller integral with the input shaft, an inner roller sandwiched on both sides of the casing, and a carrier pin fixed to the carrier integral with the output shaft In the planetary roller speed reducer in which each roller is circumscribed and inscribed in a preload state,
One or both sides of the casing are provided with a plurality of holes arranged to face each of the inner rollers, and a plurality of locking pins are inserted into the holes to prevent the inner rollers from rotating,
The detent pin is aligned with the inner roller, and two parallel planes with a width narrower than the diameter of the detent pin are provided in a portion protruding from one side or both sides of the inner roller. A planetary roller reduction device characterized in that a barrel-shaped long hole having the same width as two parallel planes of a stop pin is provided so that a parallel surface of the long hole faces a radial direction. A plurality of planetary rollers rotatably supported via rolling bearings on a sun roller integral with the input shaft, an inner roller sandwiched on both sides of the casing, and a carrier pin fixed to the carrier integral with the output shaft In the planetary roller speed reducer in which each roller is circumscribed and inscribed in a preload state,
One or both sides of the casing are provided with a plurality of holes arranged to face each of the inner rollers, and a plurality of locking pins are inserted into the holes to prevent the inner rollers from rotating,
The non-rotating pin is aligned with the inner roller, and two parallel planes having a width smaller than the diameter of the detent pin are provided in the portion protruding from one side or both sides of the inner roller, and the hole provided in the casing is provided with the anti-rotating pin. A planetary roller speed reducer characterized in that a circular hole having a diameter larger than the diameter of the pin is provided, and a half-moon shaped slider is provided in each gap between the two parallel planes of the detent pin and the circular hole. A plurality of planetary rollers rotatably supported via rolling bearings on a sun roller integral with the input shaft, an inner roller sandwiched on both sides of the casing, and a carrier pin fixed to the carrier integral with the output shaft In the planetary roller speed reducer in which each roller is circumscribed and inscribed in a preload state,
One or both sides of the casing are provided with a plurality of holes arranged to face each of the inner rollers, and a plurality of locking pins are inserted into the holes to prevent the inner rollers from rotating,
Two planes parallel to the cylindrical head protruding from one side of the inner roller and the casing are formed by aligning or press-fitting with each pair of holes provided symmetrically at the same radial position on the inner roller and the inner roller mounting surface of the casing. The cylindrical head has two to four detent pins fixed to the inner roller in the radial direction, and has the same width as the parallel portion at the tip of the detent pin. Four long holes with parallel parts longer than the pins are provided at the same radius as the inner roller, at an angular position of 90 degrees,
A planetary roller speed reducer characterized in that a protruding portion of a detent pin of an inner roller and a projected portion of a detent pin of a casing are alternately inserted into four elongated holes. In the planetary roller speed reducing device according to any one of claims 1 to 3 ,
A planetary roller reduction device comprising a ring plate sandwiched between a casing and an inner roller. In the planetary roller speed reducer according to claim 4 ,
The surface of the two ring plates sandwiched between the casing and the inner roller is plated with titanium or hard chrome, etc., or a coating of self-lubricating fluorine or molybdenum sulfide is applied, or the ring plate A planetary roller reduction device characterized in that the surface is shot peened or a lubricating oil-impregnated sintered metal material is used as the material of the ring plate. In the planetary roller speed reducer according to any one of claims 1 to 5 ,
A planetary roller speed reducing device, wherein a lubricating oil pool chamber is provided at the lowest position of the casing, a non-magnetic support base is installed away from the casing, and a magnet is attached to the support base.

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