TWM598899U - Retainer unit and turntable bearing - Google Patents

Abstract

This model is a retainer unit and a turntable bearing, which is composed of an inner ring, an outer ring and a retainer unit, wherein the retainer unit is arranged between the inner ring and the outer ring, and is composed of a retainer body and The dust-proof ring is composed of the design of positioning the dust-proof ring on the holder body, so that the inner or outer ring can drive the holder body and the dust-proof ring to rotate during the operation of the turntable bearing. And because the rotation speed of the retainer body and the dust ring is lower than the rotation speed of the inner ring or the outer ring, excessive friction between the dust ring and the inner ring or the outer ring can be avoided, and the damage speed of the dust ring can be reduced. Effectively prolong the dustproof and lubrication effect of the turntable bearing.

Description

Retainer unit and turntable bearing

The new type is related to the retainer unit and the turntable bearing, and particularly refers to a retainer unit suitable for the turntable bearing.

The turntable bearing is a supporting slewing mechanism in which the inner ring rotates and the outer ring is locked (in some states, the outer ring rotates and the inner ring is locked). The turntable bearing is composed of three rows of rolling elements. Two rows of axial rolling elements ensure stable axial bearing capacity and overturning moment action. One row of radial rolling elements ensures that the bearing can withstand radial loads, which is suitable for composite load-carrying slewing mechanisms.

Refer to Figure 1A, which is a diagram of a rotary table bearing provided by US Publication No. US9422923B2. It is mainly provided with two rows of rolling elements 12 arranged horizontally and a row of rolling elements 12 arranged longitudinally between the outer ring 10 and the inner ring 11 , And each row of rolling elements 12 is isolated and guided by a retainer 13 to keep them in the bearing. At the same time, a dust ring 14 is provided between the outer ring 10 and the inner ring 11. The dust ring 14 can To prevent external dust or harmful gases from entering the inner cavity of the turntable bearing and causing damage to the turntable bearing, it can also keep the grease (oil) inside the turntable bearing from losing during use, ensuring that the turntable bearing is in a lubricated state;

However, as the turntable bearing is in operation, the inner ring 11 remains stationary, while the outer ring 10 keeps rotating, and the rotating outer ring 10 will drive the dust ring 14 to rotate synchronously and at a constant speed. This causes excessive frictional contact between the dust ring 14 and the inner ring 11, which accelerates the rate of damage of the dust ring 14 and loses the dust-proof and lubricating effects.

In addition, refer to Figure 1B, which is a diagram of a turntable bearing provided by US Publication No. US9541136B2, which also has two rows of rolling elements 17 arranged horizontally and a row arranged longitudinally between the outer ring 15 and the inner ring 16 The rolling elements 17 and each row of rolling elements 17 are isolated and guided by a retainer 18 to keep the rolling elements 17 in the bearing. At the same time, one end of the dust ring 19 is fixed to the inner ring 16, and the lip of the dust ring 19 191 is attached to the outer ring 15. This structure provides that although the dust ring 19 will not rotate synchronously with the outer ring 15, it will still cause excessive frictional contact between the rotating outer ring 15 and the dust ring 19 , It will also accelerate the defect that the dust-proof ring 19 is damaged, and lose the dust-proof and lubricating effect.

The purpose of the present invention is to provide a retainer unit and a turntable bearing, which mainly reduces the damage speed of the dust-proof ring and prolongs the dustproof and lubricating effect of the turntable bearing.

Another object of the present invention is to provide a retainer unit and a turntable bearing, which mainly improve the ease of installation of the dustproof ring of the dustproof unit of the retainer.

To achieve the foregoing purpose, the present invention is a turntable bearing, which includes: an inner ring having an inner ring end surface; an outer ring rotatably sleeved on the inner ring and having an outer ring facing the inner ring end surface End face; and a holder unit, which is arranged between the inner ring and the outer ring, and includes a holder body and a dust ring, wherein:

The retainer body can be driven by the outer ring and arranged between the inner ring end surface and the outer ring end surface, and has an outer ring portion, an inner ring portion located inside the outer ring portion, and plural radial connections The interval between the outer ring portion and the inner ring portion, and a plurality of first positioning portions provided on the outer ring portion; and

The dust-proof ring has a dust-proof ring portion and a plurality of second positioning portions, the dust-proof ring portion has a first lip that abuts against the end surface of the inner ring and a second lip that abuts against the end surface of the outer ring, Each of the second positioning parts is arranged on the dust-proof ring part and mutually positioned with each of the first positioning parts so that the dust-proof ring part abuts against the outer ring part of the holder body.

The effect of the present invention is that by positioning the dust ring on the holder body, the outer ring can drive the holder body and the dust ring on it to rotate during the operation of the turntable bearing, and The rotation speed of the retainer body and the dust-proof ring is lower than that of the outer ring, so as to avoid excessive friction between the dust-proof ring and the inner ring, thereby reducing the damage speed of the dust-proof ring and effectively extending the dust-proof and lubrication effect of the turntable bearing .

Before presenting a detailed description, it should be noted that in the following description, similar components and parts are represented by the same numbers.

Please refer to Figures 2 to 5B. The first embodiment of the present invention provides a turntable bearing, which is composed of an inner ring 20, an outer ring 30 and two retainer units A, in which:

The inner ring 20 is composed of two ring bodies 20A, the two ring bodies 20A are superimposed on each other and arranged coaxially, and the radial outer sides of the two ring bodies 20A are respectively recessed inward to jointly form an annular assembly groove 21. The notch of the assembling groove 21 faces radially outward, and the annular assembling groove 21 has two inner ring end surfaces 211 facing each other.

The outer ring 30 is rotatably sleeved in the annular assembly groove 21 of the inner ring 20 and has two outer ring end surfaces 31 facing the inner ring end surface 211 respectively.

Since the inner ring 20 and the outer ring 30 are both conventional components, and their assembly methods and operation methods are the same as those in the prior art, and they are not the focus of the creation of the new model, the detailed structure and operation methods of these components are no longer detailed. Narrated.

The two holder units A are both arranged between the inner ring 20 and the outer ring 30, and each includes a holder body 40 and a dust-proof ring 50, wherein:

The retainer body 40 is a ring-shaped body and can be driven by the inner ring 20 and is disposed between the inner ring end surface 211 and the outer ring end surface 31 (in some embodiments, the retainer body 40 is externally Driven by the ring 30), the retainer body 40 has an outer ring portion 41, an inner ring portion 42 located inside the outer ring portion 41, and a plurality of spacers 43 connecting the outer ring portion 41 and the inner ring portion 42 in the radial direction. , A plurality of first positioning portions 44 arranged on the outer ring portion 41 in the radial direction, and a plurality of holding portions connecting the outer ring portion 41 and the inner ring portion 42 in the radial direction and arranged between two adjacent spacing portions 43 45. In this embodiment, the outer ring portion 41 has a first outer ring surface 411 and a first inner ring surface 412 opposite to the first outer ring surface 411. The inner ring portion 42 has a second outer ring surface 421 facing the first inner ring surface 412 and a second inner ring surface 422 opposite to the second outer ring surface 421. The spacer 43 connects the first inner ring surface 412 and the second outer ring surface 421, and has a through hole 431 adjacent to the outer ring portion 41. The number and position of the through hole 431 correspond to the first positioning portion The number and location of 44. Each of the first positioning portions 44 is in the shape of a radially open groove and communicates with the through hole 431, and the orientation of the notches of two adjacent first positioning portions 44 are different. In this embodiment, two adjacent The notches of the first positioning portion 44 respectively face the axial ends of the holder body 40, but not limited to this, as long as at least one notch of the first positioning portion 44 faces differently from the other first positioning portions. The notch of one positioning portion 44 may face. Each of the holding portions 45 is for the rolling accommodation of the rolling elements 91, and the rolling surface of each rolling element 91 contacts between the inner ring end surface 211 of the inner ring 20 and the outer ring end surface 31 of the outer ring 30.

The dust ring 50 has a dust ring portion 51 and a plurality of second positioning portions 52. The dust ring portion 51 is attached to the first outer ring surface 411 of the outer ring portion 41 of the holder body 40 and has a sticker A first lip portion 511 leaning against the inner ring end surface 211 of the inner ring 20 and a second lip portion 512 leaning against the outer ring end surface 31 of the outer ring 30, each of the second positioning portions 52 is provided on the dust ring The portion 51 and each of the first positioning portions 44 are mutually positioned so that the dust-proof ring portion 51 abuts against the outer ring portion 41 of the holder body 40. In this embodiment, each of the second positioning portions 52 is convexly cylindrically shaped from the radial inner side of the dust-proof ring portion 51 along the radial direction of the dust-proof ring portion 51, and the second positioning portion 52 has a concave position. The groove-shaped neck portion 521 in the first positioning portion 44 and a head portion 522 connected to the neck portion 521 and abutting against the other side of the first positioning portion 44. In this embodiment, the head 522 of the second positioning portion 52 is a semicircular body, but not limited to this. As shown in FIG. 6, the head 522A of the second positioning portion 52 may be a cylinder, as shown in FIG. As shown, the head portion 522B of the second positioning portion 52 may be a cone, that is, the cross section of the head portion 521 of the second positioning portion 52 is larger than the groove width of the first positioning portion 44 in a groove shape, so that the The dust-proof ring 50 can be combined with the first positioning portion 44 of the holder body 40 by the second positioning portion 52 without being separated.

The above is the configuration description of the main components of the authoring embodiment. As for the action method and effect of this creation, the description is as follows.

First, it can reduce the damage speed of the dust-proof ring 50 and extend the dust-proof and lubricating effect of the turntable bearing. Since the present creation is to position the dust-proof ring 50 on the holder body 40, the dust-proof ring 50 will not rotate at a constant speed with the rotation of the inner ring 20, that is, the turntable bearing is in the operating process, although The inner ring 20 can drive the holder body 40 and the dust ring 50 thereon to rotate, but the rotation speed of the holder body 40 and the dust ring 50 is much lower than the rotation speed of the inner ring. Therefore, the dust ring 50 can be avoided Excessive friction between the inner ring 50 and the inner ring 20 can reduce the damage speed of the dust-proof ring 50 and effectively extend the dust-proof and lubricating effect of the turntable bearing.

Second, the ease of installation of the dustproof ring 50 of the dustproof unit A of the holder is improved. Since the present invention positions the dust-proof ring 50 on the holder body 40, and the two can be assembled by positioning the first positioning portion 44 and the second positioning portion 52 mutually, the dust-proof ring 50 is effectively improved when installed The ease of the holder body 40; and in this embodiment, the first positioning portion 44 of the holder body 40 is designed to be groove-shaped, and the orientation of the notch of each adjacent first positioning portion 44 is different Therefore, when the dust ring 50 is fixed on the groove-shaped first positioning portion 44 by the second positioning portion 52 in the shape of a convex column, it is only necessary to align the second positioning portions 52 of the dust ring 50 Press into the first positioning portion 44 longitudinally, and clamp the dust-proof ring portion 51 and the head 521 of the second positioning portion 52 on both sides of the outer ring portion 41 of the holder body 40, thereby enhancing the dust-proof Ease of installation of ring 50. At the same time, the dustproof ring 50 is made of a material that has great deformability and can return to its original shape when the deforming force is removed, such as rubber, so as to improve the ease of installation of the dustproof ring 50.

Thirdly, the stability of the combination of the dust-proof ring 50 and the holder body 40 is improved. Since the present invention specifically designs the first positioning portion 44 of the holder body 40 to be in the shape of a groove, and the orientation of the notch of each adjacent first positioning portion 44 is different, therefore, when the dust ring 50 is convex Each of the columnar second positioning portions 52 is fixed behind the groove-shaped first positioning portion 44, and each of the second positioning portions 52 is restricted by the design of the notch of each adjacent first positioning portion 44 differently. The possibility of detachment in the longitudinal direction can prevent the dust ring 50 from detaching from the holder body 40 longitudinally, thereby effectively improving the stability of the combination of the dust ring 50 and the holder body 40.

Fourth, it has dust-proof and lubricating effects. After positioning the dust-proof ring 50 on the holder body 40 in the present invention, the dust-proof ring 50 has a first lip 511 designed to abut against the inner ring end surface 211 of the inner ring 20 and abut against the outer ring 30 The second lip 512 of the ring end surface 31 is designed so that the space between the outer ring 30 and the inner ring 20 for the holder body 40 is sealed by the dust ring 50, which can prevent external dust or harmful gases It enters the inner cavity of the turntable bearing and avoids the loss of grease (oil) inside the turntable bearing during use, which has dust-proof and lubricating effects.

Please refer to FIG. 8, the second embodiment of the present invention provides a turntable bearing, which is different from the first embodiment in:

Each first positioning portion 44 of the retainer body 40 is designed as a perforation type, and each second positioning portion 52 of the dust ring 50 is maintained in a convex column type, and in order to enable the second positioning of the dust ring 50 The portion 52 can be inserted and positioned on the first positioning portion 44 in a perforated shape. The second positioning portion 52 is made of a material that has great deformability and can return to its original shape when the deformation force is removed, such as rubber.

Refer to Figures 9A and 9B, which are respectively a turntable bearing provided by the third embodiment of the new type. The difference from the first embodiment is:

The first positioning portion 44 of the holder body 40 adopts a convex pillar design, and the second positioning portion 52 of the dust-proof ring 50 adopts a groove design (or a perforation design), which is similar to the first embodiment of the first embodiment. The groove design of one positioning part is opposite to the design of the convex post of the second positioning part. Therefore, in the third embodiment, the outer ring portion 41 of the holder body 40 is located at the radial inner side of the second positioning part 52. The first positioning portion 44 of the main body 40 has a neck 441 located at the second positioning portion 52 of the dust ring 50, and a head 442 connected to the neck 441 and abutting against the other side of the second positioning portion 52, At the same time, the head 442 of the first positioning portion 44 of the holder body 40 is a semicircular body, of course, it can also be as shown in FIG. 10, and the head 442A of the first positioning portion 44 of the holder body 40 is a cylinder, or As shown in FIG. 11, the head 442B of the first positioning portion 44 of the holder body 40 is a cone.

[Learning] 10: Outer ring 11: inner ring 12: Rolling body 13: retainer 14: Dust ring 15: Outer ring 16: inner ring 17: Rolling body 18: retainer 19: Dust ring 191: Lips [This new model] 20: inner ring 21: Annular assembly groove 211: inner ring end face 30: Outer ring 31: Outer ring end face A: Keeper unit 40: Keeper body 41: Outer Ring 411: First outer ring surface 412: first inner torus 42: inner ring 421: second outer ring surface 422: second inner torus 43: Spacer 431: Through Hole 44: The first positioning part 441: neck 442, 442A, 442B: head 45: holding part 50: Dust ring 51: Dust ring 511: first lip 512: second lip 512 52: The second positioning part 521: neck 522, 522A, 522B: head 91: rolling body

Figure 1A is one of the drawings of the US bulletin number US9422923B2; Figure 1B is one of the drawings of the US Bulletin No. US9541136B2; Figure 2 is a three-dimensional partial cross-sectional view of the first embodiment of the creation; Figure 3 is a partial enlarged view of Figure 2; Figure 4 is a three-dimensional exploded view of the first embodiment of the creation; Figure 5A is a partial three-dimensional partial exploded view of the first embodiment of this creation, showing a state where the holder body and the dust ring are separated; Figure 5B is a partial three-dimensional partial assembly diagram of the first embodiment of the creation, showing the state of the holder body and the dust ring combined; Figure 6 is a partial three-dimensional partial exploded view of the first embodiment of the present creation, showing a state where the head of the second positioning part of the dust ring is a cylinder; Fig. 7 is a partial three-dimensional partial exploded view of the first embodiment of the present creation, showing a state where the head of the second positioning part of the dust ring is a cone; Figure 8 is a partial three-dimensional partial exploded view of the second embodiment of the present creation, showing the state where the first positioning portion of the holder body is perforated; Figure 9A is a three-dimensional partial cross-sectional view of the third embodiment of the creation; Figure 9B is a plan partial sectional view of the third embodiment of the present creation; Fig. 10 is a plan partial sectional view of the third embodiment of the present creation, showing a state where the head of the first positioning portion of the holder body is a cylinder; and Fig. 11 is a plan partial cross-sectional view of the third embodiment of the present creation, showing a state where the head of the first positioning portion of the holder body is a cone.

20: inner ring

21: Annular assembly groove

211: inner ring end face

30: Outer ring

31: Outer ring end face

A: Keeper unit

40: Keeper body

50: Dust ring

51: Dust ring

511: first lip

512: second lip 512

52: The second positioning part

521: neck

522: head

Claims (10)

A retainer unit, including: A retainer body has an outer ring portion, an inner ring portion located inside the outer ring portion, a plurality of spacers connecting the outer ring portion and the inner ring portion in the radial direction, and a plurality of first ring portions provided on the outer ring portion A positioning part; and A dust-proof ring has a dust-proof ring part and a plurality of second positioning parts, each of the second positioning parts is provided on the dust-proof ring part and mutually positioned with each of the first positioning parts, so that the dust-proof ring part abuts against the holder The outside of the outer ring of the body. The holder unit according to claim 1, wherein each first positioning portion of the holder body is a perforation or a groove, and each second positioning portion of the dust-proof ring is a convex post. The retainer unit according to claim 2, wherein the dust-proof ring portion of the dust-proof ring is located on the radially outer side of the first positioning portion, and the second positioning portion has a neck located at the first positioning portion and a connection The neck abuts against the head radially inside of the first positioning portion. The holder unit according to claim 2, wherein when each of the first positioning portions of the holder body is a groove, the orientation of the notches of two adjacent first positioning portions are different. The holder unit according to claim 1, wherein the first positioning portion of the holder body is a convex post, and the second positioning portion of the dust ring is a perforation or a groove. A rotary table bearing, including: An inner ring, an annular assembly groove is recessed on the radially outer side of the inner ring, and the annular assembly groove has an inner ring end surface; An outer ring rotatably sleeved in the annular assembly groove, and having an outer ring end surface facing the inner ring end surface; and A retainer unit is arranged between the inner ring and the outer ring, and includes a retainer body and a dust-proof ring, wherein: The retainer body is rotatably arranged between the inner ring end surface and the outer ring end surface, and has an outer ring portion, an inner ring portion located inside the outer ring portion, and a plurality of radially connected to the outer ring portion A spacer portion with the inner ring portion, and a plurality of first positioning portions provided on the outer ring portion; The dust-proof ring has a dust-proof ring portion and a plurality of second positioning portions, the dust-proof ring portion has a first lip that abuts against the end surface of the inner ring and a second lip that abuts against the end surface of the outer ring, Each of the second positioning parts is arranged on the dust-proof ring part and mutually positioned with each of the first positioning parts so that the dust-proof ring part abuts against the outer ring part of the holder body. The turntable bearing according to claim 6, wherein each first positioning portion of the holder body is a perforation or a groove, and each second positioning portion of the dust-proof ring is a convex post. The turntable bearing according to claim 7, wherein the dust-proof ring portion of the dust-proof ring is located radially outside of the first positioning portion, and the second positioning portion has a neck located at the first positioning portion and a connecting portion The neck is against the head radially inside the first positioning part. The turntable bearing according to claim 7, wherein when each first positioning portion of the holder body is a groove, the orientation of the notches of two adjacent first positioning portions are different. The turntable bearing according to claim 6, wherein the first positioning portion of the holder body is a convex post, and the second positioning portion of the dust ring is a perforation or a groove.

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