JP2018054028A - Bearing fixture and bearing mechanism - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent seizure of a washer to suppress abrasion.SOLUTION: A first recess part 11 provided on a lower side of a first fixture 1 is configured to fix a portion of a bearing β supporting a shaft α extending in an x-axis direction, that is, an upper side bearing β1 by pressing it from above. On an inner peripheral surface of the first recess part 11, two grooves 14 are provided at positions on a side of a +x direction, and other two grooves are provided at positions on a side of a -x direction. The groove 14 is configured to draw in lubricant discharged from a slide surface between the upper side bearing β1 and the shaft α. Lubricant accumulated in the groove 14 is supplied to a slide surface of a washer γ through a hole h corresponding thereto.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a bearing fixture and a bearing mechanism in which a bearing and a washer used in a vehicle such as an automobile are fixed so that lubricating oil used in the bearing flows also on a sliding surface of the washer.

  Patent Document 1 describes a thrust washer in which a first outer diameter portion matched to a housing diameter and a second outer diameter portion having a smaller diameter than the first outer diameter portion are alternately formed in the circumferential direction. ing.

Japanese Patent Laid-Open No. 2004-19800

  When the thrust washer is used only on the upper side, most of the lubricating oil discharged from the upper side bearing flows out of the lower side bearing where the thrust washer is not assembled, and is supplied to the sliding part of the thrust washer. Less lubricant.

  An object of the present invention is to suppress wear by preventing the washer from being seized.

  The present invention is provided in the first fixing tool, the first fixing tool, the first recess for fixing the portion of the bearing supporting the shaft extending in the axial direction, the first fixing tool, A second recess for fixing a washer used together with the bearing; a second fixture combined with the first fixture from the side where the first recess and the second recess are provided; and the second fixture Provided is a bearing fixture having a third recess for fixing the other part of the bearing, and a groove provided in a position corresponding to a hole passing through the washer in the first recess. To do.

  In this invention, the said groove | channel may be provided in the position which does not overlap with the said bearing which a said 1st recessed part fixes in the said axial direction.

  In this invention, the said groove | channel may be provided inside the outer periphery of the said washer.

In this invention, the said groove | channel may be provided in the rotation direction downstream of the said axis | shaft among the said 1st recessed parts.

  In the present invention, a cross-sectional area of the groove in a plane perpendicular to the axial direction may be larger than an area of the hole.

  The present invention includes a bearing that supports an axially extending shaft, a washer that is used together with the bearing and that has a hole penetrating in the axial direction, a first recess for fixing a portion of the bearing, and the washer. A first fixing tool provided with a second recess for fixing and a third recess for fixing other parts of the bearing are provided, and from the side where the first recess and the second recess are provided. And a second fixing tool combined with the first fixing tool, and the first recess is provided with a groove at a position corresponding to the hole.

  In the present invention, the washer may be provided with a fourth recess for holding lubricating oil on the sliding surface.

  In the present invention, the fourth recess may communicate with the hole.

  In the present invention, the fourth recess may not communicate with the outer periphery of the washer.

  According to the present invention, it is possible to prevent the washer from being seized and to suppress wear.

The figure which shows an example of the bearing fixture 9 which concerns on this invention. The figure which shows an example of the axis | shaft (alpha), bearing (beta), and washer (gamma). The figure which shows an example of the 1st fixing tool 1. FIG.

1. Embodiment 1-1. FIG. 1 is a view showing an example of a bearing fixture 9 according to the present invention. Hereinafter, in the figure, a space in which the bearing fixture 9 is arranged is represented as an xyz right-handed coordinate space. Of the coordinate symbols shown in the figure, a symbol with a point drawn in a circle represents an arrow heading from the back of the page to the near side, and a symbol with two lines intersecting in the circle is Represents an arrow from the near side to the far side.

  A direction along the x-axis in space is referred to as an x-axis direction. Of the x-axis directions, the direction in which the x component increases is referred to as + x direction, and the direction in which the x component decreases is referred to as -x direction. For the y and z components, the y-axis direction, + y direction, -y direction, z-axis direction, + z direction, and -z direction are defined according to the above definition.

  A bearing fixture 9 shown in FIG. 1 fixes a bearing β that receives a radial load of a shaft α that rotates in the direction of arrow D, and a washer γ that receives a thrust load of a structure (not shown) that rotates along with the shaft α. The bearing fixture 9 includes a first fixture 1 that fixes the bearing β and the washer γ from above, and a second fixture 2 that fixes from below. In FIG. 1, the + z direction is up, and the −z direction is the direction of gravity, ie down.

  The bearing β is a half bearing, and is configured by combining an upper side bearing β1 on the + z direction side and a lower side bearing β2 on the −z direction side. In FIG. 1, the axis α supported by the bearing β is disposed along the x-axis direction.

1-2. Configuration of Shaft, Bearing, and Washer FIG. 2 is a diagram illustrating an example of the shaft α, the bearing β, and the washer γ. FIG. 2A shows a view of the shaft α, the bearing β, and the washer γ along the + y direction. As shown in FIG. 2A, the bearing β has a width bx along the x-axis direction, and the two washers γ each have a thickness gx along the x-axis direction.

  The two washers γ are both semi-annular and plate-like members, and are arranged apart from each other in the + x direction and the −x direction of the upper side bearing β1 of the bearing β. The distance ax in the x-axis direction between the two washers γ is larger than the width bx of the bearing β (ax> bx). The washer γ is not provided in the −z direction from the central axis O, that is, in the lower side (lower side).

  FIG. 2B shows a view of the shaft α, the bearing β, and the washer γ along the −x direction. As shown in FIG. 2B, the axis α is a cylindrical member having a radius r, and rotates in the arrow D direction that is clockwise when viewed in the −x direction. The outer peripheral surface of the shaft α slides with the inner peripheral surface of the bearing β. The outer periphery G of the washer γ is at a distance gy from the central axis O of the axis α. The outer periphery of the bearing β is at a distance of a radius by from the central axis O of the axis α.

  The first fixing tool 1 for fixing the upper bearing β1 from above has an oil passage (not shown) through which the lubricating oil passes, and is provided on the contact surface with the upper bearing β1 via this oil passage. Lubricating oil is supplied to the outer peripheral surface of the upper bearing β1 from the hole. The upper bearing β1 is provided with a through hole (not shown) at a position corresponding to the above-described hole, and the supplied lubricating oil is supplied to the inner peripheral surface of the upper bearing β1 through the through hole. And stays between the outer peripheral surface of the shaft α to reduce these frictions. The lubricating oil used for sliding the bearing β flows in the x-axis direction along the chamfer of the joint of the upper side bearing β1 and the lower side bearing β2, and in the space between the washer γ and the bearing β. Each is discharged.

  Each of the two washers γ has a hole h penetrating along the x-axis direction. Although the number of holes h may be one, as shown in Drawing 2 (b), two may be sufficient and three or more may be sufficient. Since the hole h penetrates from the sliding surface of the washer γ to the surface on the back side, the lubricating oil staying on the bearing β side flows to the sliding surface of the washer γ. The sliding surface of the washer γ is a sliding surface between the washer γ and a structure attached to the shaft α, and is a surface opposite to the surface facing the bearing β.

  Two holes h shown in FIG. 2B are provided in each of the azimuth θ1 and the azimuth θ2 with respect to the + y-axis direction on the yz plane. The two holes h may be provided at symmetrical positions with the xz plane as a mirror surface.

  Moreover, the 4th recessed part c which hold | maintains lubricating oil may be provided in the sliding surface of washer (gamma). The 4th recessed part c shown in FIG.2 (b) is making the inner peripheral side and the outer peripheral side communicate in semicircular washer (gamma). The lubricating oil supplied from the shaft α is supplied from the inner peripheral side of the fourth recess c to the sliding surface.

  Further, the fourth recess c may communicate with the hole h. In this configuration, the lubricating oil discharged from the hole h to the sliding surface flows to the outer periphery G by the fourth recess c.

1-3. Configuration of Second Fixing Tool A second fixing tool 2 shown in FIG. 1 has a contact surface 20 that is combined with the first fixing tool 1 from the lower side of the first fixing tool 1. Further, the second fixture 2 has two end faces 23 at both ends in the x-axis direction.

  The third recess 21 provided on the upper side of the second fixture 2 fixes a portion (other portion) of the bearing β that is not a portion to which the first recess 11 (described later) of the first fixture 1 is fixed. It is a recessed part for doing. Here, since the bearing β is a half bearing, and the first fixture 1 fixes the upper side bearing β1 by the first recess 11, this “other portion” is the lower side bearing β2.

1-4. Configuration of First Fixing Device FIG. 3 is a diagram illustrating an example of the first fixing device 1. FIG. 3A shows a view of the first fixture 1 as viewed along the + z direction. FIG. 3B shows a view of the first fixture 1 viewed along the −x direction.

  The first recess 11 provided on the lower side of the first fixture 1 is a recess for pressing and fixing the portion of the bearing β supporting the shaft α extending in the x-axis direction, that is, the upper bearing β1 from above. is there.

  Since the inner peripheral surface of the first recess 11 accommodates the bearing β having the outer peripheral surface with the radius by, there is a distance greater than the radius by from the central axis O of the axis α. Here, assuming that the clearance between the inner peripheral surface of the first recess 11 and the bearing β is negligible, the distance from the central axis O to the inner peripheral surface of the first recess 11 is a radius by.

  Of the inner peripheral surface of the first recess 11, there is a region 111 in contact with the upper side bearing β1 having the width bx at the center in the x-axis direction. A groove 14 is provided in a region other than the region 111 in the inner peripheral surface of the first recess 11. The region 111 and the groove 14 do not overlap. That is, the groove 14 is provided at a position in the x-axis direction that does not overlap with the upper bearing β1 fixed by the first recess 11.

  The grooves 14 are provided in a total of four locations, two on the + x direction side and two on the −x direction side of the inner peripheral surface of the first recess 11. As shown in FIG. 3B, the grooves 14 are provided in each of the azimuth θ1 and the azimuth θ2 with respect to the + y-axis direction on the yz plane viewed in the −x direction. These positions are positions corresponding to the holes h in the washer γ. That is, the groove 14 is provided at a position corresponding to the hole h penetrating the washer γ in the first recess 11. The groove 14 has a bottom farther from the central axis O than the inner peripheral surface of the first recess 11 and draws in the lubricating oil discharged from the sliding surface between the upper side bearing β1 and the shaft α.

  The correspondence relationship between the groove 14 and the hole h is not limited to the orientation on the yz plane with the central axis O as a reference, and is determined depending on, for example, which of the first to fourth quadrants on the yz plane. Also good. Further, the orientation on the yz plane around the central axis O of the groove 14 and the corresponding hole h may be deviated, within a predetermined range, or with a predetermined deviation. There may be. In short, these orientations only need to have a correspondence.

  The second recesses 12 provided below the first fixture 1 and on both sides of the first recess 11 in the x-axis direction are recesses for fixing the washer γ used together with the bearing β. The second recess 12 has a thickness cx in the x-axis direction. The thickness cx is a size that can accommodate the washer γ having the thickness gx.

  Further, the inner circumferential surface of the second recess 12 is farther from the central axis O by the distance cy than the inner circumferential surface of the first recess 11. That is, the inner peripheral surface of the second recess 12 is a distance obtained by adding the distance cy to the radius by from the central axis O. The two second recesses 12 communicate with both end surfaces 13 in the x-axis direction in the first fixture 1 and sandwich the first recess 11 from both sides in the x-axis direction. The distance obtained by adding the distance cy to the radius by is equal to or longer than the radius gy that is the distance from the central axis O of the washer γ to the outer periphery G. Thereby, the 2nd recessed part 12 accommodates washer (gamma).

  Further, a portion of the lower surface of the first fixture 1 excluding the first recess 11 and the second recess 12 is a contact surface 10. The contact surface 10 is a surface that comes into contact with the second fixture 2 when combined with the second fixture 2 described later. The first fixture 1 has two end faces 13 at both ends in the x-axis direction.

  A bearing fixture 9 is formed by combining the first fixture 1 and the second fixture 2, and the bearing β and the washer γ are fixed. As shown in FIG. 1, the shaft α that is rotatably supported by the bearing β rotates in the arrow D direction, that is, in the clockwise direction as viewed in the −x direction.

  The bearing fixture 9, the bearing β, and the washer γ constitute a bearing mechanism that rotatably supports the shaft α.

  According to these configurations, the lubricating oil used in the bearing β and discharged from the joint is retained in the groove 14 provided in the first recess 11 of the first fixture 1. Since the groove 14 is provided at a position corresponding to the hole h provided in the washer γ, the lubricating oil staying in the groove 14 is supplied to the sliding surface of the washer γ through the hole h corresponding thereto. The

2. Modification The above is the description of the embodiment, but the contents of this embodiment can be modified as follows. Further, the following modifications may be combined.

2-1. Modification 1
In the embodiment described above, the groove 14 is provided at a position that does not overlap the bearing β in the x-axis direction, but may be provided at a position that overlaps the bearing β in the x-axis direction. Even in this case, the groove 14 only needs to have a function of attracting and retaining the lubricating oil discharged from the bearing β.

2-2. Modification 2
In the embodiment described above, the groove 14 has a bottom farther from the central axis O than the inner peripheral surface of the first recess 11, but the groove 14 is provided inside the outer periphery G of the washer γ. Is desirable. That is, the above-described bottom of the groove 14 is located farther from the central axis O than the inner peripheral surface of the first recess 11, but may not be located farther from the central axis O than the outer periphery G of the washer γ. According to this configuration, the lubricating oil discharged from the groove 14 along the x-axis direction is difficult to be directly discharged to the outside of the outer periphery G of the washer γ, so that the lubricating oil is easily supplied to the sliding surface of the washer γ. Become.

2-3. Modification 3
In the above-described embodiment, the groove 14 is provided on both the upstream side and the downstream side in the rotation direction of the axis α in the first recess 11, but only on the downstream side in the rotation direction of the axis α in the first recess 11. May be provided. Here, as described above, the rotation direction is the clockwise direction when the axis α is viewed in the −x direction, and the first concave portion 11 is the upward direction of the axis α, that is, the + z direction. In FIG. 3B, the −y direction is the upstream side in the rotational direction from the central axis O, and the + y direction is the downstream side in the rotational direction. That is, the groove 14 may be provided only in the direction θ1 in the example shown in FIG.

  Even if the groove 14 is not provided on the upstream side in the rotational direction, if the groove 14 is provided on the downstream side in the rotational direction, the lubricating oil flowing into the hole h provided on the downstream side in the rotational direction can be drawn in the washer γ. Is possible.

2-4. Modification 4
The cross-sectional area of the groove 14 in a plane perpendicular to the x-axis direction may be configured to be larger than the area of the hole h. According to this configuration, it is possible to design the lubricant so that the resistance through the hole h is greater than the resistance through the groove 14, and the amount of the lubricating oil staying in the groove 14 can be increased. Is possible.

2-5. Modification 5
In the above-described embodiment, the fourth recess c that holds the lubricating oil is provided on the sliding surface of the washer γ, but the fourth recess c may not be provided.

2-6. Modification 6
In the above-described embodiment, the fourth recess c communicates with the hole h, but may not communicate with the hole h. Even in this case, the fourth recess c holds the lubricating oil supplied from the hole h to the sliding surface and causes the lubricating oil to stay on the sliding surface.

2-7. Modification 7
In the above-described embodiment, the fourth concave portion c communicates the inner peripheral side and the outer peripheral side in the semi-circular washer γ, but the fourth concave portion c does not communicate with the outer peripheral G of the washer γ. Also good. If it is this structure, since it becomes difficult to discharge | emit the lubricating oil which accumulated in the 4th recessed part c from the outer periphery G, it becomes easy to stay on a sliding surface.

2-8. Modification 8
In the embodiment described above, the bearing β has a halved shape, but may have a shape obtained by dividing a cylinder into three or more, or may have a cylindrical shape that is not divided.

2-9. Modification 9
There may be a plurality of the first fixture 1 and the second fixture 2. For example, when one shaft α is rotatably supported by a plurality of bearings β, a plurality of bearing fixtures 9 may fix the respective bearings β. In this case, each of the plurality of first fixing tools 1 or second fixing tools 2 includes a ladder frame that is supported at the ends in the x-axis direction by two frames extending in the x-axis direction at both ends in the y-axis direction. It may be configured. Thereby, the number of parts, such as a vehicle provided with the bearing fixture 9, is suppressed.

DESCRIPTION OF SYMBOLS 1 ... 1st fixing tool, 10 ... Contact surface, 11 ... 1st recessed part, 111 ... Area | region, 12 ... 2nd recessed part, 13 ... End surface, 14 ... Groove, 2 ... 2nd fixing tool, 20 ... Contact surface, 21 ... 3rd recess, 23 ... end face, 9 ... bearing fixture, c ... 4th recess, G ... outer periphery, O ... central axis, α ... shaft, β ... bearing, β1 ... upper side bearing, β2 ... lower side bearing, γ ... washer.

Claims (9)

A first fixture;
A first recess for fixing a portion of a bearing that is provided in the first fixture and supports a shaft extending in the axial direction;
A second recess provided on the first fixture for fixing a washer used with the bearing;
A second fixture that is combined with the first fixture from the side where the first recess and the second recess are provided;
A third recess provided in the second fixture for fixing other parts of the bearing;
Of the first recess, a groove provided at a position corresponding to a hole penetrating the washer;
Bearing fixture. The bearing fixture according to claim 1, wherein the groove is provided in a position that does not overlap the bearing fixed by the first recess in the axial direction. The bearing fixture according to claim 1, wherein the groove is provided inside an outer periphery of the washer. The said groove | channel is provided in the rotation direction downstream of the said axis | shaft among the said 1st recessed parts. The bearing fixture as described in any one of Claim 1 to 3 characterized by the above-mentioned. The bearing fixture according to any one of claims 1 to 4, wherein a cross-sectional area of the groove in a plane perpendicular to the axial direction is larger than an area of the hole. A bearing that supports an axially extending shaft;
A washer used with the bearing and having a hole penetrating in the axial direction;
A first recess provided with a first recess for fixing the bearing portion and a second recess for fixing the washer;
A second recess that is provided with a third recess for fixing the other part of the bearing and is combined with the first fixture from the side where the first recess and the second recess are provided;
Have
The first recess is provided with a groove at a position corresponding to the hole. The bearing mechanism according to claim 6, wherein the washer is provided with a fourth recess that holds lubricating oil on a sliding surface. The bearing mechanism according to claim 7, wherein the fourth recess communicates with the hole. The bearing mechanism according to claim 7 or 8, wherein the fourth recess does not communicate with the outer periphery of the washer.

Images