TWI662204B - Harmonic reducer with an oil guiding ring - Google Patents

Abstract

The invention is a harmonic reducer with an oil guide ring. An oil guide ring is provided in the original accommodation space of the flexible external gear of the harmonic reducer module, and the oil guide ring is fixed on the oil guide ring. The coupling of the harmonic reducer module is located between the first housing of the harmonic reducer module and the flexible bearing. Therefore, after the grease is injected through the oil injection hole of the first housing, the grease is Each oil inlet hole of the oil guide ring enters the oil storage ring groove. When the wave generator rotates, the grease in the oil storage ring groove is guided to the flexible bearing of the wave generator through the wall surface of the ring groove. According to the lubricating flexible bearing, the present invention avoids foreign matter and impurities due to wear caused by insufficient lubrication on the basis of effective lubrication, and does not need to change the outer size of the original reducer.

Description

Harmonic reducer with oil guide ring

The present invention relates to a harmonic reducer, and particularly to a harmonic reducer with an oil guide ring.

Referring to FIG. 1A, a diagram of a patent of the Republic of China (TW I592590) is shown. The patent document is a harmonic reducer with a lubricating holder, which is mainly formed by the design of the lubricating holder 111 and the oil seal 112. The space 113 allows the bearing 114, the cam 115, and the European coupling 116 which are superimposed and combined to be sufficiently lubricated in the lubrication space 113, so as to achieve the effects of extending the life and reducing wear.

However, since the pre-patent case is provided with a lubricating holder 111, and the lubricating space 113 is formed between the lubricating holder 111 and the oil seal 112 and the flexible gear 117 accommodating portion 1171, it is easy to cause The friction between the lubricating holder 111 and the accommodating portion 1171 corresponding to the external teeth of the flexible gear 117 generates heat and abrasion, but instead increases foreign matter and impurities inside the reducer, which increases the reducer's wear.

Referring to FIG. 1B, one diagram of the Republic of China patent (TWM561745) is shown. This patent document is a reducer automatic lubrication device. The oil storage tank 1311 of the capping unit 131 is provided with a corresponding one of the flexible bearing 132. The first oil injection hole 1312 and the second oil injection hole 1313 corresponding to the engagement between the internal tooth 1331 and the external tooth 1341. Therefore, the pressurizing unit 135 generates a pressurized gas for pressurizing the piston member 136, so that The piston member 136 pushes the grease 137 in the oil storage tank 1311, and causes the grease 137 to be output through the first oil filling hole 1312 and the second oil filling hole 1313, thereby respectively lubricating the flexible bearing 132 and And the internal tooth 1331 of the rigid internal tooth gear 133 and the external tooth 1341 of the flexible external tooth gear 134 are lubricated to increase the service life.

However, since the capping unit 131 is screwed from a cap body 1314 and a cap member 1315, and the capping body 1314 has an annular oil storage tank 1311 for storing grease 137 and a storage tank 1311 The first oil injection hole 1312 and the second oil injection hole 1313 communicating with the oil groove 1311 must be used together with the piston member 136 and the pressurizing unit 135. Therefore, the original design will be changed to increase the overall volume of the reducer and increase the cost of parts. .

The object of the present invention is to provide a harmonic speed reducer with an oil guide ring, which will not generate foreign matter impurities due to abrasion under the basis of effective lubrication.

Another object of the present invention is to provide a harmonic reducer with an oil guide ring, which does not need to change the external size of the original reducer mainly on the basis of effective lubrication.

To achieve the foregoing object, the present invention is a harmonic reducer with an oil guide ring, including: a harmonic reducer module, including a first housing, a crossed roller bearing, a rigid internal gear, and a flexible External tooth gear, a wave generator, and a second housing; the first housing has an oil injection hole; the cross roller bearing has a bearing outer ring fixed on the first housing, and an opposite A bearing inner ring pivoted on the bearing outer ring; the rigid internally toothed gear is fixed on the bearing inner ring and has a plurality of internal teeth; the flexible externally toothed gear has a first housing and the fixed A main body portion between the outer rings of the bearing, and a flexible cylindrical portion connected to the main body portion, the flexible cylindrical portion having a plurality of outer teeth meshing with the inner teeth, and an accommodation space communicating with the oil injection hole ; The wave generator has a coupling member and a flexible bearing, the coupling member is pivotally disposed on the first housing and penetrates the accommodation space, and the flexible bearing is disposed on the flexible cylindrical portion And the coupling, and In the accommodating space; the second casing is fixed to the rigid internally toothed gear and sleeved on the coupling; and an oil guide ring is disposed in the accommodating space and located in the first casing Between the flexible bearing and the flexible bearing, the oil guide ring has a set of sleeve fixing holes fixed to the coupling member, a first ring end surface facing the flexible bearing, and a second ring end surface facing the first housing. An oil storage ring groove recessed from the end surface of the first ring and having a notch facing the flexible bearing, and a plurality of oil inlet holes recessed from the second ring end surface and communicating with the oil storage ring groove.

The effect of the present invention is that the oil guide ring is provided in the original accommodation space of the flexible externally toothed gear, and the oil guide ring is sleeved on the coupling member and located between the first housing and the Between the flexible bearings, after the grease is injected through the oil injection hole of the first housing, the grease will enter the oil storage ring groove from each oil inlet hole of the oil guide ring. When the wave generator rotates, The grease in the oil storage ring groove is guided to the flexible bearing of the wave generator through its ring groove wall surface, thereby lubricating the flexible bearing. According to this, the present invention can prevent the oil bearing from being guided on the basis of effective lubrication. The oil ring and the flexible externally toothed gear generate foreign matter and impurities due to abrasion, and there is no need to change the original design.

Preferably, the oil storage ring groove of the oil guide ring has a ring groove bottom surface and a ring groove wall surface connected to the ring groove bottom surface, the ring groove wall surface is inclined, and the ring groove bottom surface faces the first ring. The direction of the end face is gradually enlarged. This effectively guides the grease injected from the oil injection hole to the flexible bearing. Preferably, the oil inlet holes of the oil guide ring are connected between the end surface of the second ring and the bottom surface of the ring groove.

Preferably, the oil inlet holes of the oil guide ring are gradually expanded from the bottom surface of the ring groove toward the end surface of the second ring.

Preferably, the harmonic reducer module further includes a first bearing, the first bearing is disposed between the first housing and the coupling member, and the first bearing faces the oil guide ring. Each oil inlet should be.

Preferably, the oil guide ring further has a ring notch portion recessed from the bottom surface of the ring groove, and the ring notch portion and the collar surface of the coupling member define a non-return space.

Preferably, the oil guide ring further has a ring groove groove recessed from the bottom surface of the ring groove, and the ring groove groove is connected between the ring groove bottom surface and the ring groove wall surface.

Preferably, the oil injection hole of the first casing and each oil inlet of the oil guide ring form an oil injection flow channel.

Preferably, the oil guide ring is made of metal or plastic.

Preferably, there is a gap between the oil guide ring and the flexible cylindrical portion of the flexible externally toothed gear.

[Habitant]

111‧‧‧Lubrication retainer

112‧‧‧oil seals

113‧‧‧Lubrication space

114‧‧‧bearing

115‧‧‧ cam

116‧‧‧European single coupling

117‧‧‧flexible gear

1171‧‧‧accommodation department

131‧‧‧Capping unit

1311‧‧‧oil tank

1312‧‧‧First oil injection hole

1313‧‧‧Second oil injection hole

1314‧‧‧Cap body

1315‧‧‧Cap

132‧‧‧flexible bearing

133‧‧‧ rigid internal gear

1331‧‧‧Tooth

134‧‧‧Flexible external gear

1341‧‧‧Outer teeth

135‧‧‧Pressure unit

136‧‧‧Piston

137‧‧‧ Grease

[this invention]

A‧‧‧ Harmonic Reducer Module

21‧‧‧First case

211‧‧‧oil injection hole

22‧‧‧Second shell

25‧‧‧ Crossed Roller Bearing

251‧‧‧bearing outer ring

252‧‧‧bearing inner ring

253‧‧‧Roller

30‧‧‧ rigid internal tooth gear

31‧‧‧Inner teeth

40‧‧‧ Flexible external gear

41‧‧‧Main body

42‧‧‧ flexible tube

421‧‧‧External teeth

422‧‧‧accommodation space

50‧‧‧ wave generator

51‧‧‧Couplings

511‧‧‧annular surface

512‧‧‧screw holes

52‧‧‧flexible bearing

521‧‧‧Flexible bearing outer ring

522‧‧‧Flexible bearing inner ring

523‧‧‧Roller

524‧‧‧ retainer

61‧‧‧First bearing

62‧‧‧Second bearing

70‧‧‧oil guide ring

71‧‧‧set of holes

72‧‧‧ first ring end face

73‧‧‧ second ring end face

74‧‧‧oil storage ring groove

741‧‧‧notch

742‧‧‧bottom of ring groove

743‧‧‧ ring groove wall surface

75‧‧‧oil inlet

76‧‧‧ perforation

77‧‧‧Notch

78‧‧‧ ring groove

79‧‧‧ ring side

81‧‧‧Screw

811‧‧‧Head

812‧‧‧body

83‧‧‧oil storage space

85‧‧‧oil injection channel

87‧‧‧ Grease

89‧‧‧ Non-reverse space

H‧‧‧ Clearance

FIG. 1A is one of the drawings of the Republic of China patent (TW I592590); FIG. 1B is one of the drawings of the Republic of China patent (TWM561745); FIG. 2 is a perspective combination view of an embodiment of the present invention; and FIG. 3 is another embodiment of the present invention. A perspective combination view of perspective; FIG. 4 is a perspective view of an embodiment of the present invention, showing a three-dimensional state of an oil guide ring; FIG. 5 is a sectional view of an embodiment of the present invention, showing a cross-sectional state of an oil guide ring; 6 is a sectional view; and FIG. 7 is a sectional view of a line segment 7-7 in FIG. 2.

Please refer to FIG. 2 to FIG. 7. An embodiment of the present invention provides a harmonic reducer with an oil guide ring, which mainly includes a harmonic reducer module A and an oil guide ring 70, wherein: The harmonic reducer module A includes a first housing 21, a crossed roller bearing 25, a rigid internally toothed gear 30, a flexible externally toothed gear 40, a wave generator 50, and a second housing. 22. A first bearing 61 and a second bearing 62.

The first casing 21 has an oil injection hole 211.

The crossed roller bearing 25 has a bearing outer ring 251 fixed to the first housing 21, a bearing inner ring 252 pivoted relative to the bearing outer ring 251, and a plurality of bearing outer rings 251 and a bearing. Roller 253 between inner rings 252.

The rigid internally toothed gear 30 is fixed on the bearing inner ring 252 and has a plurality of internal teeth 31.

The flexible externally toothed gear 40 has a top hat shape, and has a main body portion 41 fixed between the first housing 21 and the bearing outer ring 251, and a main body portion 41 connected to the main body portion 41 and extending in the axial direction. The flexible cylindrical portion 42 is capable of flexing in the axial direction and has a plurality of external teeth 421 meshing with the internal teeth 31 and an accommodation space 422 communicating with the oil injection hole 211. The wave generator 50 has a coupling member 51 and a flexible bearing 52. The coupling member 51 is pivotally disposed on the first housing 21 and penetrates the accommodation space 422. The flexible bearing 52 is disposed on the The flexible cylindrical portion 42 and the coupling member 51 are located in the accommodation space 422.

The second casing 22 is fixed on the rigid internally toothed gear 30 and is sleeved on the coupling member 51. At the same time, the coupling member 51 is pivoted relative to the second casing 22.

The first bearing 61 is disposed between the first casing 21 and the coupling member 51 to provide a state in which the coupling member 51 is pivotally disposed in the first casing 21.

The second bearing 62 is disposed between the second casing 22 and the coupling member 51 to provide a state in which the coupling member 51 is pivotally disposed in the second casing 22.

The oil guide ring 70 is disposed in the accommodation space 422 and is located between the first housing 21 and the flexible bearing 52. The oil guide ring 70 has a set of fixing holes 71 fixed to the coupling member 51. A first ring end surface 72 toward the flexible bearing 52, a second ring end surface 73 toward the first housing 21, a first ring end The surface 72 is recessed and has an oil storage ring groove 74 facing the notch 741 of the flexible bearing 52 and a plurality of oil inlet holes 75 recessed from the second ring end surface 73 and communicating with the oil storage ring groove 74.

In this embodiment, as shown in FIG. 4 and FIG. 6, the oil guide ring 70 further has two perforations 76 that are in radial communication with the set of fixing holes 71 by the ring side 79, and each of the perforations 76 is in the form of a fisheye hole. A first aperture portion 761 recessed from the ring side surface 79 and a second aperture portion 762 communicating with the first aperture portion 761 and having an aperture smaller than the aperture of the first aperture portion 761 are provided. The ring surface 511 is radially provided with two screw holes 512, and the two through holes 76 are respectively provided with a screw 81, and each of the screws 81 is passed through each of the through holes 76 and locked to each screw hole 512, wherein the head of the screw 81 is 811 Abutting against the first hole portion 761, the body portion 812 of the screw 81 is inserted into the second hole portion 762 and screwed into the screw hole 512 of the coupling member 51, so that the oil guide ring 70 is fixed on the hole On the coupling member 51. In addition, the oil storage ring groove 74 of the oil guide ring 70 and the collar surface 511 of the coupling member 51 together define an oil storage space 83, and the oil storage ring groove 74 of the oil guide ring 70 has a ring groove bottom surface 742 And a ring groove wall surface 743 connected to the ring groove bottom surface 742, the ring groove wall surface 743 is inclined, and the ring groove bottom surface 742 is gradually expanded toward the first ring end surface 72, so that the ring groove wall surface 743 is inclined in the direction of the flexible bearing 52. At the same time, each oil inlet hole 75 is connected between the second ring end surface 73 and the ring groove bottom surface 742, and each oil inlet hole 75 is gradually expanded from the ring groove bottom surface 742 toward the second ring end surface 73. That is, it has a tapered hole shape, and each of the oil inlet holes 75 corresponds to the first bearing 61. At the same time, the oil injection hole 211 of the first housing 21 and each oil inlet hole 75 of the oil guide ring 70 form Oil-filling runner 85. Furthermore, the oil guide ring 70 is made of plastic material, of course, it can also be made of metal material. When the oil guide ring 70 is made of plastic material, the production cost can be reduced. When the oil guide ring 70 is made of metal material Improved life when made. In addition, there is a gap H between the oil guide ring 70 and the flexible cylindrical portion 42 of the flexible externally toothed gear 40.

The above is the configuration description of the main components of the embodiment of the present invention. The operation mode and effect of the present invention are described below.

Referring to FIG. 7, when the grease 87 (shown by an arrow) is injected through the oil filling hole 211 of the first housing 21, the grease 87 will be filled through the oil filling hole 211 of the first housing 21 and the oil guide ring 70. The oil injection channel 85 formed by each of the oil inlet holes 75 flows into the oil storage space 83 defined by the oil storage ring groove 74 and the collar surface 511 of the coupling member 51, and when the wave generator When the coupling member 51 of 50 is rotated, the rotating coupling member 51 synchronously drives the oil guide ring 70, so that the grease 87 in the oil guide ring 70 is guided through the inclined groove wall surface 743 to The flexible bearing 52 is used to lubricate the flexible bearing 52, thereby increasing the life of the harmonic reducer and avoiding waste of grease 87.

Accordingly, the oil guide ring 70 is provided in the original accommodation space 422 of the flexible externally toothed gear 40, and the oil guide ring 70 is sleeved on the coupling member 51 and located in the first housing. Between 21 and the flexible bearing 52, after the grease 87 is injected through the oil injection hole 211 of the first housing 21, the grease 87 will enter the oil storage ring groove through the oil inlet holes 75 of the oil guide ring 70. In 74, when the wave generator 50 rotates, the grease 87 in the oil storage ring groove 74 can be guided to the flexible bearing 52 of the wave generator 50 through the ring groove wall surface 743, thereby lubricating the flexibility. Bearing 52, therefore, the present invention can avoid foreign matter and impurities due to wear due to insufficient lubrication on the basis of effective lubrication, without the need to change the original size of the reducer.

It is worth mentioning that, since the oil inlet holes 75 of the oil guide ring 70 are in the shape of a tapered hole and correspond to the first bearing 61, and each of the oil inlet holes 75 gradually faces the first bearing 61, Expanded, therefore, the grease 87 in each oil inlet 75 will flow to the first bearing 61 along the guide of the wall of each oil inlet 75, and then lubricate and lift the first bearing 61. The life of the first bearing 61.

In addition, in this embodiment, the oil guide ring 70 is more particularly provided with a ring notch portion 77 recessed from the ring groove bottom surface 742, and the ring notch portion 77 is defined by the collar surface 511 of the coupling member 51. There is a non-return space 89, and at the same time, the oil guide ring 70 further has an annular groove 78 recessed from the annular groove bottom surface 742, and the annular groove groove 78 connects between the annular groove bottom surface 742 and the annular groove wall surface 743. The non-return space 89 and the ring groove 78 are both lower than The ring groove bottom surface 742 of the oil storage ring groove 74 also prevents the grease 87 in the oil storage ring groove 74 from being prevented by the small end aperture of the check space 89, the ring groove 78, and the oil inlet hole 75. The small diameters of the oil inlet holes 75 communicating with the oil storage ring groove 74 are lost to ensure that when the wave generator 50 rotates, the oil storage space 83 still has grease 87 and the flexible bearing 52 can still be carried out. lubricating.

It is worth noting that, in this embodiment, a gap H is designed between the oil guide ring 70 and the flexible cylindrical portion 42 of the flexible externally toothed gear 40, so the oil guide ring will not be allowed on the basis of effective lubrication. 70 and the flexible cylindrical portion 42 cause foreign matter and impurities to be generated due to abrasion.

Finally, referring to FIG. 7 again, in this embodiment, the flexible bearing 52 includes a flexible bearing outer ring 521, a flexible bearing inner ring 522, and a plurality of inner and outer rings 522, 521 provided in the flexible bearing. Between the rolling element 523 and a retainer 524 provided at one end of the inner and outer rings 522 and 521 of the flexible bearing, wherein the flexible bearing 52 is assembled to keep the retainer 524 away from the oil guide ring 70, that is, Let the open end surface of the flexible bearing 52 face the oil guide ring 70. In this way, when the wave generator 50 rotates, the grease 87 can be guided directly by the ring groove wall surface 743 of the oil storage ring groove 74 and can be directly guided. Entering the inside of the flexible bearing 52 will not be stopped by the holder 524 to effectively lubricate the flexible bearing 52.

In summary, the above-mentioned embodiments and drawings are merely preferred embodiments of the present invention. When the scope of implementation of the present invention cannot be limited by it, all equivalent changes and modifications made in accordance with the scope of the patent application of the present invention shall belong to Within the scope of the invention patent.

Claims (10)

A harmonic reducer with an oil guide ring includes: a harmonic reducer module including a first housing, a crossed roller bearing, a rigid internal gear, a flexible external gear, and a wave generator And a second housing; the first housing has an oil injection hole; the crossed roller bearing has a bearing outer ring fixed on the first housing, and a bearing pivoted relative to the bearing outer ring Bearing inner ring; the rigid internal tooth gear is fixed on the bearing inner ring and has a plurality of internal teeth; the flexible external tooth gear has a main body portion fixed between the first housing and the bearing outer ring And a flexible cylindrical portion connected to the main body portion, the flexible cylindrical portion has a plurality of external teeth meshing with the internal teeth, and an accommodation space communicating with the oil injection hole; the wave generator has a A coupling member and a flexible bearing, the coupling member being pivotally disposed on the first housing and passing through the accommodating space, the flexible bearing being disposed between the flexible cylindrical portion and the coupling member, And is located in the accommodating space; the second casing is fixed on the rigid internally toothed gear and is sleeved on the coupling member; and An oil guide ring is disposed in the accommodating space and is located between the first housing and the flexible bearing. The oil guide ring has a set of fixing holes fixed to the coupling member, and faces the flexible bearing. A first ring end surface, a second ring end surface facing the first housing, an oil storage ring groove recessed from the first ring end surface and having a notch facing the flexible bearing, and a plurality of the first ring end surfaces An oil inlet hole of the second ring end surface is recessed and communicates with the oil storage ring groove. The harmonic reducer with an oil guide ring according to claim 1, wherein the oil storage ring groove of the oil guide ring has a ring groove bottom surface and a ring groove wall surface connected to the ring groove bottom surface, and the ring groove wall surface is inclined And gradually expand from the bottom surface of the ring groove toward the end surface of the first ring. The harmonic speed reducer with an oil guide ring according to claim 2, wherein each oil inlet hole of the oil guide ring is connected between the end surface of the second ring and the bottom surface of the ring groove. The harmonic speed reducer with an oil guide ring according to claim 2 or 3, wherein each oil inlet hole of the oil guide ring gradually expands from the bottom surface of the ring groove toward the end surface of the second ring. The harmonic reducer with an oil guide ring according to claim 1, wherein the harmonic reducer module further includes a first bearing, and the first bearing is disposed between the first housing and the coupling member. And the first bearing faces each of the oil inlet holes of the oil guide ring. The harmonic speed reducer with an oil guide ring according to claim 2, wherein the oil guide ring further has a ring recessed portion recessed from the bottom surface of the ring groove, and the ring recessed portion and the shaft of the coupling member The torus defines a non-reverse space. The harmonic speed reducer with an oil guide ring according to claim 2, wherein the oil guide ring further has a ring groove groove recessed from the bottom surface of the ring groove, and the ring groove connects the bottom surface of the ring groove and the wall surface of the ring groove between. The harmonic reducer with an oil guide ring according to claim 1, wherein the oil injection hole of the first casing and each oil inlet hole of the oil guide ring form an oil injection flow channel. The harmonic speed reducer with an oil guide ring according to claim 1, wherein the oil guide ring is made of metal or plastic. The harmonic speed reducer with an oil guide ring according to claim 1, wherein there is a gap between the oil guide ring and the flexible cylindrical portion of the flexible externally toothed gear.