TWM585308U - Ball spline with lubrication mechanism - Google Patents

Abstract

The present invention provides a ball spline with a lubrication mechanism, comprising: a long shaft member; a nut member provided on the long shaft member; a linear bearing unit provided between the long shaft member and the nut member A bearing ring sleeved on the outside of the nut member; an oil circuit ring member disposed between the bearing ring and the nut member, and having an outer ring surface, an inner ring surface, and an outer ring A ring groove, an inner ring groove, and a plurality of through holes communicating from the outer ring groove to the inner ring groove; and a ring bearing unit disposed between the nut member and the bearing ring. According to this, the oil circuit ring can be effectively guided to the inside of the ball spline at any angle to avoid wear of the balls on the linear bearing unit due to insufficient lubrication, thereby improving the purpose of life.

Description

Ball spline with lubrication mechanism

The present invention relates to a ball spline, in particular to a ball spline with a lubrication mechanism.

Referring to FIG. 1, there is shown a schematic diagram of an oil-fillable spline device of TW I606192. The oil-fillable spline device includes a spline shaft 1, and a set is provided on the spline shaft 1 and has most of the oil guide. A nut member 3 of the hole 2, a linear bearing unit 4 installed between the spline shaft 1 and the nut member 3, a bearing ring 5 rotatably sleeved outside the nut member 3, a set An oil path fitting 6 provided between the bearing ring 5 and the nut member 3, and a hoop bearing unit 7 installed between the nut member 3 and the bearing ring 5. The bearing ring 5 has an oil injection hole 8, and the oil path fitting 6 has a positioning portion 9 and an oil introduction channel 10 opposite to the oil injection hole 8. The oil injection hole 8, the oil introduction channel 10, and the positioning portion 9 An oil storage tank 11 and any of the oil guide holes 2 form a continuous oil circuit, and the linear bearing unit 4 can be directly filled with oil by using the continuous oil circuit, and the oil storage tank 11 can avoid excessive oil filling, which can make the spline The device achieves better lubrication effect. However, it still has the following defects that need to be improved in actual use:

When the linear bearing unit 4 is installed between the spline shaft 1 and the nut member 3, it must provide an effective lubrication function. If it is used without lubrication, it will increase the number of bearings installed on the linear bearing unit 4. The wear of the balls 12 further shortens the service life of the lubricating function. However, when the pre-patent is activated, the oil circuit fitting 6 must be at a specific angle so that the oil storage tank 11 can accurately correspond to the oil guide hole 2. The lubricating effect is relatively poor, and multiple oil injections are required. As a result, it will affect the service life and smoothness during operation.

Please refer to Japanese Patent No. JP2014047863A, which discloses that the outer ring member of the bearing device is provided with an oil delivery hole and the inner ring member is provided with an oil supply hole, thereby achieving the technical content of lubricating the rolling elements in the bearing device. Among them, the positions of the oil delivery hole and the oil supply hole, because the inner ring member also rotates with the work when the outer ring member rotates, so when grease is injected, the oil will accumulate between the inner ring member and the outer ring member. , Not only will the situation of excessive grease injection occur, but also it is not easy to directly transfer the grease into the bearing device, and it is impossible to determine whether the effect of lubrication is achieved.

The purpose of the present invention is to provide a ball spline with a lubricating mechanism, which can achieve the lubrication effect at any angle, and avoid the wear of the first ball on the linear bearing unit due to insufficient lubrication, thereby improving the service life.

To achieve the foregoing object, the present invention is a ball spline with a lubrication mechanism, including:

A long shaft member extends along an axis and has an outer peripheral surface; a nut member is slidably sleeved on the long shaft member along the axis, and has an inner ring surface opposite to the outer peripheral surface, and an opposite An outer annular surface on the inner annular surface, and a plurality of oil guide holes communicating from the outer annular surface to the inner annular surface; a linear bearing unit including a first ball retainer and a plurality of first balls, the first balls A retainer is disposed between the outer peripheral surface and the inner ring surface, the plurality of first balls are disposed on the first ball holder and contact the outer peripheral surface and the inner ring surface; a bearing ring is sleeved on the nut member And has an inner side opposite to the outer ring surface, an outer side opposite to the inner side, and at least one oil injection hole communicating from the outer side to the inner side; an oil circuit ring member provided at Between the inner side surface of the bearing ring and the outer ring surface of the nut member, there is an outer diameter ring surface opposite to the inner surface, an inner diameter ring surface opposite to the outer diameter ring surface, and a recess The outer ring groove is connected to the outer ring groove of the oil injection hole, and a recess is formed on the inner ring groove and communicates with the An inner ring groove of the oil hole, and a plurality of through holes communicating from the outer ring groove to the inner ring groove; and a ring bearing unit provided on the outer ring surface of the nut member and the inner side surface of the bearing ring between.

The effect of the new model is that by providing the outer ring groove communicating with the oil injection hole and the inner ring groove communicating with the oil guide hole on the oil circuit ring, the oil circuit ring is At an angle, the grease can be effectively guided to the ball return path of the linear bearing unit to lubricate the first ball on the linear bearing unit, to avoid the first ball on the linear bearing unit due to insufficient lubrication. The purpose of generating abrasion and thereby improving service life.

Preferably, an inner groove of the bearing ring is recessed with an engaging groove for the oil circuit ring member to be engaged and communicated with the oil injection hole.

More preferably, the outer diameter torus of the oil circuit ring member is embedded in the engaging groove of the bearing ring.

Preferably, a gap is formed between an inner diameter annular surface of the oil circuit ring member and an outer annular surface of the nut member.

Preferably, the inner diameter annular surface of the oil circuit ring member is abutted against the outer annular surface of the nut member.

Preferably, the groove width of the outer concave ring groove along the axis is greater than the aperture width of the oil injection hole.

Preferably, a groove width of the recessed ring groove along the axis is larger than an aperture width of the oil guide hole.

Preferably, the oil circuit ring member is made of a rubber material having an IRHD hardness of 60-90. The axial ends of the oil circuit ring member respectively have a positioning portion abutting against the bearing ring, and each of the positioning portions is embedded. A ring-shaped support sheet.

More preferably, each of the annular supporting pieces is made of iron material.

Preferably, the long shaft member has a plurality of pairs of first ball grooves recessed from the outer peripheral surface, and the nut member has a plurality of pairs of second balls provided on the inner annular surface and opposite to the plurality of pairs of first ball grooves. Groove, and at least one third ball groove recessed in the outer ring surface, each group of the first ball is nested in the corresponding pair of first ball grooves and the pair of second ball grooves, respectively, the bearing The ring has at least one fourth ball groove recessed in the inner side and opposite to the at least one third ball groove. The ring bearing unit has at least one second ball retainer, and a plurality of second ball bearings are mounted on the at least one second ball. A plurality of second balls in the holder are nested in the corresponding third ball groove and the fourth ball groove.

Please refer to FIGS. 2 to 5. A ball spline with a lubricating mechanism provided by the first embodiment of the present invention is mainly composed of a long shaft member 20, a nut member 30, a linear bearing unit 40, and a bearing ring. 50. An oil circuit ring member 60 and an annular bearing unit 70, wherein:

The long shaft member 20 is a screw and extends along an axis L, and has an outer peripheral surface 21, a plurality of pairs of first ball grooves 22 recessed from the outer peripheral surface 21 and parallel to the axis L, and an outer peripheral surface 21 The outer spiral grooves 23 are recessed and staggered with the pairs of the first ball grooves 22. In this embodiment, the long shaft member 20 is provided with three pairs of the first ball grooves 22.

The nut member 30 is sleeved on the long shaft member 20 along the axis L, and has an inner ring surface 31 opposite to the outer peripheral surface 21 and an outer ring surface 32 opposite to the inner ring surface 31. A plurality of oil guide holes 33 communicating from the outer torus 32 to the inner torus 31, a plurality of pairs of second ball grooves 34 provided in the inner torus 31 and opposite the first ball grooves 22, and two A third ball groove 35 recessed in the outer annular surface 32 and surrounding the axis L; in this embodiment, there are three oil guide holes 33 spaced apart, and three oil guide holes 33 are located in two of the third Between the ball grooves 35.

The linear bearing unit 40 is disposed between the outer peripheral surface 21 of the long shaft member 20 and the inner ring surface 31 of the nut member 30, so that the nut member 30 can linearly slide relative to the long shaft member 20, and It has a set of a first ball holder 41 provided with the long shaft member 20, a ball return channel 42 provided on the first ball holder 41, and a ball return channel 42 installed on the first ball holder 41. In each of the first balls 43, each group of the first balls 43 is nested in the corresponding pair of first ball grooves 22 and the pair of second ball grooves 34 respectively.

Since the assembly method of the long shaft member 20, the nut member 30, and the linear bearing unit 40 are all known, and the operation method is the same as the conventional method, and it is not the focus of the creation of this case, so for these components (referring to The detailed structure, assembly method and operation method of the long shaft member 20, the nut member 30, and the linear bearing unit 40) will not be described in detail.

The bearing ring 50 is rotatably sleeved on the outside of the nut member 30 with the axis L as a rotation axis, and has an inner side surface 51 opposite to the outer ring surface 32 and an opposite side surface of the inner side surface 51. The outer side surface 52, two oil injection holes 53 communicating from the outer side surface 52 to the inner side surface 51, and two fourth ball grooves 54 recessed in the inner side surface 51 and opposite to the third ball grooves 35. The four ball grooves 54 are annularly arranged around the axis L. In this embodiment, an inner recess 51 of the bearing ring 50 is recessed with an engaging recess for the oil path ring 60 to be engaged and communicated with the oil injection hole 53. The groove 55 is located between the two ball grooves 54 and is annularly arranged around the axis L. The groove width W1 of the engagement groove 55 along the axis L is equal to the oil ring. The outer diameter width W2 of the along the axis L along the axis L is not limited thereto, and the groove width W1 of the engaging groove 55 along the axis L may be larger than the outer diameter width W2 of the oil passage ring 60 along the axis L. .

The oil circuit ring member 60 is made of rubber (IRHD hardness is 60-90). In other embodiments, it can also be made of engineering plastic, and is arranged on the inner side surface 51 of the bearing ring 50 and the nut member 30. Between the outer ring surfaces 32, there is an outer diameter ring surface 61 opposite to the inner side surface 51, an inner diameter ring surface 62 opposite to the outer ring surface 61 and facing the outer ring surface 32, and a recess An outer ring groove 63 on the outer diameter torus 61 and communicating with the oil injection hole 53, an inner ring groove 64 recessed on the inner diameter torus 62 and communicating with the oil guide hole 33, and a plurality of outer rings The groove 63 communicates with the through hole 65 of the inner ring groove 64, so that the lubricating grease can be injected through the oil injection hole 53 and then flow through the outer ring groove 63, the through hole 65, the inner ring groove 64, the The oil guide hole 33 finally reaches the ball return path 42 of the linear bearing unit 40 to lubricate the first ball 43. As shown in FIG. 5, in this embodiment, the outside of the oil circuit ring member 60 and the engaging groove 55 of the inner side surface 51 of the bearing ring 50 are engaged with each other, and the inner diameter ring surface 62 of the oil circuit ring member 60 Abutment on the outer ring surface 32 of the nut member 30; the groove width W3 of the outer concave ring groove 63 along the axis L is larger than the aperture width W4 of the oil injection hole 53; the groove of the inner concave ring groove 64 along the axis L The width W5 is larger than the aperture width W6 of the oil guide hole 33.

The hoop bearing unit 70 is disposed between the outer ring surface 32 of the nut member 30 and the inner side surface 51 of the bearing ring 50 and coaxially with the oil passage ring member 60, and has two second ball retainers. 71, and a plurality of second balls 72 installed in two of the second ball holders 71. Furthermore, the number of the ring bearing units 70 is two, and they are respectively disposed on the third ball grooves 35. A plurality of second balls 72 of each of the ring bearing units 70 are rollingly disposed in each of the third ball grooves 35 and a fourth ball groove 54 corresponding to each of the third ball grooves 35.

The above is the configuration description of the main components of the embodiment of the present invention. As for the efficacy of this new type is described below.

According to this, because the oil circuit ring 60 of the present invention is provided with the outer ring groove 63 communicating with the oil injection hole 53 and the inner ring groove 64 communicating with the oil guide hole 33, the oil circuit ring At any angle, the grease 60 can be effectively guided to the ball return path 42 of the linear bearing unit 40 to lubricate the first ball 43 and avoid the first ball 43 on the linear bearing unit 40. The purpose is to increase wear life due to wear due to insufficient lubrication.

Referring to FIG. 5 and FIG. 6, a ball spline with a lubrication mechanism provided by a second embodiment of the present invention is different from the first embodiment in that:

The inner diameter annular surface 62 of the oil circuit ring member 60 does not abut against the outer annular surface 32 of the nut member 30, so that the inner diameter annular surface 62 of the oil passage ring member 60 and the outer annular surface of the nut member 30 A gap G is formed between 32; accordingly, the new model can not only effectively lubricate the first ball 43 but also the grease can be guided to the second ball of the hoop bearing unit 70 through the gap G 72, so as to achieve the effects of improving the lubrication and reducing abrasion of the second ball 72.

Referring to FIG. 7, a third embodiment of the present invention provides a ball spline with a lubrication mechanism. The third embodiment is different from the second embodiment in that:

The axial ends of the oil ring member 60 each have a positioning portion 66 that abuts against the bearing ring 50, and each of the positioning portions 66 is embedded in an annular support piece 80. In this embodiment, the support piece 80 is iron. Made of material, in other embodiments, it can also be made of other metals, engineering plastics, carbon fibers or alloy materials. Through the above design, the oil circuit ring 60 can be more firmly embedded in the bearing ring 50. The groove 55 is engaged to achieve a more stable and fixed position effect.

In summary, the above-mentioned embodiments and drawings are only 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 new model shall be applied. It is within the scope of this new patent.

﹝ Xizhi
1‧‧‧ spline shaft
2‧‧‧ oil guide hole
3‧‧‧nut pieces
4‧‧‧ linear bearing unit
5‧‧‧bearing ring
6‧‧‧oil circuit accessories
7‧‧‧ Toroidal bearing unit
8‧‧‧ oil injection hole
9‧‧‧ Positioning Department
10‧‧‧ Oil Pilot
11‧‧‧oil tank
12‧‧‧Ball ﹝ This new type ﹞
G‧‧‧ Clearance
L‧‧‧ axis
W1‧‧‧Slot width
W2‧‧‧ Outside diameter width
W3‧‧‧Slot width
W4‧‧‧Aperture width
W5‧‧‧Slot width
W6‧‧‧Aperture width
20‧‧‧Long shaft parts
21‧‧‧outer surface
22‧‧‧The first ball groove
23‧‧‧ Outer spiral groove
30‧‧‧nut parts
31‧‧‧ inner torus
32‧‧‧ outer torus
33‧‧‧oil guide hole
34‧‧‧Second ball groove
35‧‧‧The third ball groove
40‧‧‧ Linear Bearing Unit
41‧‧‧The first ball cage
42‧‧‧ Ball return channel
43‧‧‧The first ball
50‧‧‧bearing ring
51‧‧‧ inside
52‧‧‧ outside
53‧‧‧Filling hole
54‧‧‧Fourth ball groove
55‧‧‧ snap groove
60‧‧‧oil ring
61‧‧‧ outer diameter torus
62‧‧‧Inner diameter torus
63‧‧‧Outer ring groove
64‧‧‧Inner ring groove
65‧‧‧through hole
66‧‧‧Positioning Department
70‧‧‧ Toroidal bearing unit
71‧‧‧Second ball cage
72‧‧‧Second ball
80‧‧‧Iron sheet

Figure 1 is a diagram of a spline device that can be oiled by TW I606192;
2 is a perspective assembled view of a first embodiment of the present invention;
3 is an exploded perspective view of a first embodiment of the present invention;
4 is a sectional view of a first embodiment of the present invention;
5 is a partial enlarged cross-sectional view of the embodiment of FIG. 4, showing that the inner diameter torus of the oil circuit ring member is abutted against the outer torus surface of the nut member;
FIG. 6 is a partially enlarged sectional view of a second embodiment of the present invention, showing a gap formed between an inner diameter annular surface of an oil passage ring member and an outer annular surface of a nut member; and FIG. 7 is a view of a third embodiment of the present invention. A partially enlarged sectional view shows that the opposite ends of the oil circuit ring member respectively have a positioning portion abutting against the bearing ring, and each of the positioning portions is embedded with an iron piece.

Claims (10)

A ball spline with a lubrication mechanism includes:
A long axis member (20) extending along an axis (L) and having an outer peripheral surface (21);
A nut member (30) is slidably sleeved on the long shaft member (20) along the axis (L), and has an inner annular surface (31) opposite to the outer peripheral surface (21), An outer annular surface (32) of the inner annular surface (31), and a plurality of oil guide holes (33) communicating from the outer annular surface (32) to the inner annular surface (31);
A linear bearing unit (40) includes a first ball retainer (41) and a plurality of first balls (43). The first ball retainer (41) is disposed on the outer peripheral surface (21) and the inner annular surface ( 31), the plurality of first balls (43) are disposed on the first ball holder (41) and contact the outer peripheral surface (21) and the inner ring surface (31);
A bearing ring (50) is sleeved on the outside of the nut member (30) and has an inner side surface (51) opposite to the outer ring surface (32) and an outer surface opposite to the inner side surface (51). The side surface (52) and at least one oil injection hole (53) communicated from the outer surface (52) to the inner surface (51);
An oil circuit ring member (60) is disposed between the inner side surface (51) of the bearing ring (50) and the outer ring surface (32) of the nut member (30), and has an opposite side to the inner side surface ( 51), an outer diameter annular surface (61), an inner diameter annular surface (62) opposite to the outer diameter annular surface (61), a recessed in the outer diameter annular surface (61), and communicating with the oil injection hole (53 ) An outer ring groove (63), an inner ring groove (64) recessed in the inner diameter torus (62) and communicating with the oil guide hole (33), and a plurality of outer ring grooves (63 ) A through hole (65) connected to the inner ring groove (64); and a ring bearing unit (70), which is arranged on the outer ring surface (32) of the nut member (30) and the bearing ring (50) Between the inner sides (51). The ball spline with a lubricating mechanism according to claim 1, wherein an inner side surface (51) of the bearing ring (50) is recessed with an oil ring member (60) and is engaged with the oil injection hole (53). A communicating engaging groove (55). The ball spline with a lubricating mechanism according to claim 2, wherein an outer diameter annular surface (61) of the oil circuit ring member (60) is engaged with an engaging groove (55) of the bearing ring (50). The ball spline with a lubricating mechanism according to claim 1, wherein an inner diameter annular surface (62) of the oil circuit ring member (60) and an outer annular surface (32) of the nut member (30) are formed. One gap (G). The ball spline with a lubrication mechanism according to claim 1, wherein an inner diameter annular surface (62) of the oil circuit ring member (60) is abutted against an outer annular surface (32) of the nut member (30). The ball spline with a lubrication mechanism according to claim 1, wherein a groove width (W3) of the outer concave ring groove (63) along the axis (L) is larger than an aperture width (W4) of the oil injection hole (53). The ball spline with a lubricating mechanism according to claim 1, wherein a groove width (W5) of the recessed ring groove (64) along the axis (L) is larger than an aperture width (W6) of the oil guide hole (33). . The ball spline with a lubrication mechanism according to claim 1, wherein the oil circuit ring (60) is made of a rubber material having an IRHD hardness of 60-90, and the axial ends of the oil circuit ring (60) are respectively A positioning portion (66) abuts against the bearing ring (50), and each positioning portion (66) is embedded in an annular support piece (80). According to the ball spline with a lubricating mechanism according to claim 8, each of the ring-shaped supporting pieces (80) is made of iron material. The ball spline with a lubricating mechanism according to claim 1, wherein the long shaft member (20) has a plurality of pairs of first ball grooves (22) recessed from the outer peripheral surface (21), and the nut member (30 ) Has a plurality of pairs of second ball grooves (34) provided on the inner ring surface (31) and opposite to the plurality of pairs of first ball grooves (22), and at least one first groove recessed on the outer ring surface (32). Three ball grooves (35), each group of the first ball (43) is respectively nested in the corresponding pair of first ball grooves (22) and the pair of second ball grooves (34), the bearing ring ( 50) has at least one fourth ball groove (54) recessed in the inner side surface (51) and opposite to the at least one third ball groove (35), and the hoop bearing unit (70) has at least one second ball A holder (71) and a plurality of second balls (72) installed in the at least one second ball holder (71); the plurality of second balls (72) are nested in the corresponding third ball grooves ( 35) and the fourth ball groove (54).