Bearing bracket

Abstract

This invention provides a bearing bracket that can suppress durability reduction even when the bearing holding part and the part fixed to other components are formed on different planes. The bearing bracket (1) includes a bearing holding part (5) and a plurality of fixing parts (6, 7, 8, 9) that are fastened to a counterpart component (2) by fastening members (11). A predetermined fixing part (8) among the plurality of fixing parts is formed on a plane orthogonal to a plane facing the axial direction toward the bearing holding part. The predetermined fixing part is formed such that when the other fixing parts (6, 7, 9) among the plurality of fixing parts are fastened, a gap (C) is generated between the upper part of the predetermined fixing part in the vertical direction and the counterpart component. By using the fastening members to fasten the predetermined fixing part to the counterpart component, the gap is eliminated.

Description

Technical Field

[0001] This utility model relates to a bracket for holding a bearing that supports a shaft or the like so that it can rotate. Background Technology

[0002] Patent Document 1 discloses a bearing support device comprising: a housing for holding a bearing that supports a drive shaft of a vehicle for rotation; and a bracket for fixing the housing to the outer surface of an engine block. The bracket has a bracket body portion for holding the housing and a base portion for bolting to the engine block. The base portion has a shape that is bent in a direction perpendicular to the axis of the bearing in the bracket body portion. That is, the surface of the bracket body portion that holds the housing and the surface of the base portion for bolt fastening are orthogonal to each other.

[0003] Existing technical documents

[0004] Patent documents

[0005] Patent Document 1: Japanese Patent Application Publication No. 2017-116052

[0006] The problem to be solved by utility models

[0007] In the device of Patent Document 1, the base portion fastened to the engine block and the main body portion of the bracket holding the housing are formed on different planes, thus improving vehicle mounting capability. However, since the main body portion of the bracket and the base portion are formed on different planes, stress caused by assembling or retaining the bearing will occur in the displacement portion where the bracket main body portion bends or flexes towards the base portion. That is, assembly strain caused by bolting the base portion to the engine block, strain corresponding to the mass of the shaft caused by retaining the bearing, etc., will occur in this displacement portion. When stress concentrates in the displacement portion due to such strain, the durability of the bracket may be reduced. Utility Model Content

[0008] This utility model was made in view of the above-mentioned technical problem, and its purpose is to provide a bearing bracket that can suppress the reduction of durability even when the part holding the bearing and the part fixed to other components are formed on different planes.

[0009] Solution for solving the problem

[0010] To achieve the aforementioned objective, this invention comprises: a bearing retaining portion that holds a bearing internally in a manner where its axial direction is parallel to the horizontal direction; and a plurality of fixing portions that are fastened to a counterpart member having a predetermined rigidity by fastening members. A predetermined fixing portion among the plurality of fixing portions is continuously formed from the bearing retaining portion and is formed on a surface orthogonal to a surface facing the axial direction of the bearing retaining portion. By fastening the fastening members to the plurality of fixing portions respectively, the bearing bracket is mounted to the counterpart member. The bearing bracket is characterized in that, when the other fixing portions among the plurality of fixing portions are fastened, a gap exists between the upper portion of the predetermined fixing portion in the vertical direction and the counterpart member. By fastening the predetermined fixing portion to the counterpart member using the fastening members, the gap is eliminated.

[0011] Utility Model Effect

[0012] In the bearing bracket of this embodiment, the bearing bracket is fixed to the opposing member by tightening fastening members at multiple fixed portions relative to the opposing member. The multiple fixed portions include predetermined fixed portions that are continuous from the bearing housing portion and formed on a plane orthogonal to the plane facing the axis toward the bearing housing portion. The predetermined fixed portions are configured such that, when the other fixed portions are tightened relative to the opposing member, a gap is created between the predetermined fixed portions and the opposing member in the upper vertical direction. Furthermore, the predetermined fixed portions are configured such that, by tightening the fastening members, the predetermined fixed portions are fixed to the opposing member, thereby eliminating this gap. That is, the predetermined fixed portions are configured such that, when the bearing bracket is mounted on the opposing member, strain due to relatively large torsion occurs in the upper vertical portion of the predetermined fixed portions. In other words, the stress generated by tightening the predetermined fixed portions to the opposing member is concentrated in the upper vertical portion of the displacement portion in the bending or joining between the bearing housing portion and the predetermined fixed portions. Therefore, it is possible to suppress stress concentration on the lower side in the vertical direction of the displacement portion, thereby suppressing the reduction in the durability of the bearing bracket. Attached Figure Description

[0013] Figure 1 This is a view of the bearing housing portion of the bearing bracket in an embodiment of the present invention, viewed from the axial direction. It is a front view showing the state in which the fastening member is not fastened to the first fixing portion.

[0014] Figure 2 This is a view of the bearing housing portion of the bearing bracket in the embodiment of this utility model, viewed from the axial direction. It is a front view showing the state in which the fastening member is fastened to the first fixing portion.

[0015] Figure 3 It is a perspective view used to illustrate the strength components installed in the connection part.

[0016] Explanation of reference numerals in the attached figures

[0017] 1 bracket

[0018] 2. Cover component (opposite component)

[0019] 3. Holding section

[0020] 4. Fixing part

[0021] 5. Bearing housing section (bearing retainer)

[0022] 6 First fastening part

[0023] 7 Second fastening part

[0024] 8. First fixing part (specified fixing part)

[0025] 9 Second fixing part

[0026] 10 Connecting parts

[0027] 11 Bolts (fastening components)

[0028] 12 Strength Components

[0029] 13 Lower connecting part

[0030] 14. Upper connecting part

[0031] C gap Detailed Implementation

[0032] Next, the present invention will be described based on the illustrated embodiments. It should be noted that the embodiments described below are merely examples of how to embody the present invention and do not limit the present invention.

[0033] In this embodiment of the invention, the bearing bracket 1 is fixed to a counterpart member with a specified rigidity while holding the bearing (not shown). The vehicle's drive shaft and other shaft members (not shown) are rotatably held in the bearing. Therefore, the bearing bracket 1 also supports the shaft member via the bearing. The bearing bracket 1 is mounted on a cover member 2 that covers drive power sources such as the engine block and motor housing. Figure 1 As shown, this bearing bracket 1 has a retaining part 3 and a fixing part 4 as its main structures. It should be noted that the cover member 2 is equivalent to the opposing member in the embodiment of this utility model.

[0034] The retaining part 3 is a member having a predetermined thickness along the axial direction of the bearing, configured to retain the bearing. The retaining part 3 includes: a bearing housing part 5 for housing the bearing; a first fastening part 6 fixed to a cover member 2 that covers a drive source, etc., as described above; and a second fastening part 7 fixed to the cover member 2 and formed on the side opposite to the first fastening part 6, separated from the bearing housing part 5. It should be noted that the first fastening part 6 and the second fastening part 7 correspond to the plurality of fixing parts and other fixing parts among the plurality of fixing parts in the embodiments of this utility model.

[0035] like Figure 1 As shown, the bearing housing 5 is configured to house and retain the bearing internally. An annular through-hole is formed in the bearing housing 5, the inner diameter of which is the same as or slightly smaller than the outer diameter of the retained bearing. Furthermore, the bearing housing 5 is configured to retain the bearing in a manner where the bearing's axial direction is parallel to the horizontal direction. That is, by inserting the bearing into the bearing housing 5, the bearing and the axis of the shaft held by the bearing to rotate are retained in a manner where their axial directions extend horizontally. For example, in the case of a rolling bearing having an inner ring, an outer ring, and rolling elements, the bearing is housed in the bearing housing 5 with its axial direction aligned with the axial direction of the bearing housing 5. Thus, the bearing is held in the bearing housing 5 by its outer ring fitting into the inner surface of the bearing housing 5. It should be noted that the bearing housing 5 corresponds to the bearing retaining portion in the embodiment of this utility model.

[0036] It should be noted that in the bearing housing 5, protrusions protruding radially inward and edges with an inner diameter smaller than the portion for which the outer ring is fitted may also be formed on both sides of the portion for which the outer ring is fitted in the axial direction. By constructing the bearing housing 5 in this way, it is possible to prevent or suppress the bearing from falling off the bearing housing 5 along the axial direction due to external forces.

[0037] The first fastening part 6 is formed on the upper side of the bearing housing part 5 in the vertical direction, and extends through the bearing housing part 5 in the same direction as its axis. The first fastening part 6 has a threaded hole on its inner surface, which is a location for fastening with a fastening member such as a bolt (not shown). The first fastening part 6 is formed at a position corresponding to a predetermined fastening hole (not shown) formed on the cover member 2. Therefore, by fastening the fastening member in the first fastening part 6 and the fastening hole in the cover member 2, the retaining part 3 is fixed relative to the cover member 2.

[0038] The second fastening part 7 is formed on the side opposite to the first fastening part 6, separated from the bearing housing part 5, and is formed on the lower side of the bearing housing part 5 in the vertical direction. The second fastening part 7 is formed through the bearing housing part 5 and the first fastening part 6 in the same direction as their axes. Like the first fastening part 6, the second fastening part 7 has a threaded hole formed on its inner surface for fastening with a fastening member such as a bolt (not shown). In addition, the second fastening part 7 is formed at a position corresponding to other fastening holes (not shown) formed on the cover member 2. By fastening the fastening member with the second fastening part 7 and the cover member 2, the retaining part 3 is fixed relative to the cover member 2.

[0039] The fixing part 4 is a portion used to fix the retaining part 3 relative to the cover member 2 by fastening it together with the first fastening part 6 and the second fastening part 7 to the cover member 2. The fixing part 4 has a surface facing a direction perpendicular to the direction of the axis facing the retaining part 3. The fixing part 4 is integrally formed by bending from the retaining part 3. The fixing part 4 has a first fixing part 8 and a second fixing part 9, which are formed on the upper and lower sides respectively in the vertical direction relative to the retaining part 3.

[0040] The first fixing part 8 is formed on the upper side of the bearing housing part 5 in the vertical direction, extending vertically from a surface facing the axis of the bearing housing part 5 via the connecting part 10. That is, the first fixing part 8 faces horizontally and is formed by a surface extending in a direction perpendicular to the bearing housing part 5. The first fixing part 8 has a threaded hole formed on its inner surface for... Figure 2 The fastening member 11, as shown, is used for fastening. Specifically, the first fixing part 8 fastens the fastening member in a direction perpendicular to the axial direction of the bearing housing part 5, the first fastening part 6, etc. Furthermore, the first fixing part 8 is formed at a position corresponding to a predetermined fixing hole (not shown) formed on the cover member 2. Therefore, by fastening the fastening member to the first fixing part 8 and the fixing hole of the cover member 2, the retaining part 3 is fixed relative to the cover member 2. It should be noted that the first fixing part 8 corresponds to a plurality of fixing parts and a predetermined fixing part among the plurality of fixing parts in the embodiments of this utility model.

[0041] The second fixing part 9 is formed on the lower side of the retaining part 3 in the vertical direction. The second fixing part 9 extends vertically from the surface facing the axis of the retaining part 3, in the same direction as the first fixing part 8. Like the first fixing part 8, the second fixing part 9 has a threaded hole formed on its inner surface for fastening with a bolt or other fastening member (not shown). That is, the second fixing part 9 fastens fastening members in a direction perpendicular to the axis of the bearing housing part 5, the first fastening part 6, etc. Furthermore, the second fixing part 9 is formed at a position corresponding to a predetermined fixing hole (not shown) formed on the cover member 2. Therefore, by fastening the fastening member to the first fixing part 8 and the fastening hole of the cover member 2, the retaining part 3 is fixed relative to the cover member 2. It should be noted that the second fixing part 9 corresponds to a plurality of fixing parts and other fixing parts among the plurality of fixing parts in the embodiments of this utility model.

[0042] Furthermore, a reinforcing member 12 is provided at the boundary between the first fixing part 8 and the retaining part 3. The reinforcing member 12 is provided on the lower side of the connecting part 10 that connects the first fixing part 8 and the retaining part 3. That is, the reinforcing member 12 is integrated with the lower part of the connecting part 10 in the vertical direction, namely the lower connecting part 13. The reinforcing member 12 is a member used to improve the rigidity of the lower connecting part 13, and is formed by increasing the plate thickness of the lower connecting part 13 and the surrounding retaining part 3 and the first fixing part 8. In addition, the surface of the reinforcing member 12, that is, the part that becomes rounded by the retaining part 3 and the first fixing part 8, presents a smooth curved surface from the retaining part 3 side toward the first fixing part 8 side.

[0043] The procedure for fixing the bearing bracket 1 configured in this way relative to the cover member 2 will be described. First, a bearing is pre-installed or fixed in the bearing receiving part 5 of the bearing bracket 1. The bearing bracket 1, with the bearing in place, is moved to a position where it can be fastened relative to the cover member 2. That is, the bearing bracket 1 is positioned such that the positions of the first fastening part 6, the second fastening part 7, the first fixing part 8, and the second fixing part 9 in the axial direction are respectively near the positions in the axial direction of each fastening hole and each fixing hole in the cover member 2.

[0044] For the bearing bracket 1 after such positioning, firstly, the first fastening part 6 and the second fastening part 7 are fastened relative to the cover member 2. That is, by screwing in bolts (not shown) into the fastening holes of the first fastening part 6, the second fastening part 7, and the cover member 2, the retaining part 3 is fixed to the cover member 2. Next, by screwing in bolts into the other fixing holes in the second fixing part 9 and the cover member 2, the second fixing part 9 is fixed to the cover member 2. Finally, by screwing in bolts 11 into the designated fixing holes in the first fixing part 8 and the cover member 2, the first fixing part 8 is fixed to the cover member 2. In this way, the bearing bracket 1 is fixed relative to the cover member 2.

[0045] At this time, as Figure 1 As shown, in the state before the first fixing part 8 is fixed relative to the cover member 2, that is, in the state where the second fixing part 9 is fixed relative to the cover member 2 in the above-described process, a slight gap C is formed between the upper part of the first fixing part 8 in the vertical direction and the cover member 2. This gap C is only formed on the upper part of the first fixing part 8 in the vertical direction, and not on the lower part of the first fixing part 8 in the vertical direction. That is, the bolt 11 is tightened to the first fixing part 8 while the lower part of the first fixing part 8 in the vertical direction is in contact with the cover member 2. Furthermore, as... Figure 2 As shown, with the bolt 11 tightened in the first fixing part 8, the gap C is eliminated. That is, due to the tightening of the bolt 11, a torsional strain is generated on the upper side of the first fixing part 8 with the connecting part 10 as the fulcrum. Furthermore, with the bolt 11 tightened in the first fixing part 8, the first fixing part 8 is fixed relative to the cover member 2 in a state where the upper part of the first fixing part 8 in the vertical direction is slightly deformed in a way that it approaches the cover member 2 (a state where a torsional strain is generated).

[0046] With this structure, a relatively large stress is generated at the upper connecting portion 14, which is the upper side of the vertical direction of the connecting portion 10, which is the boundary portion between the retaining portion 3 and the first fixing portion 8, due to deformation or strain at the upper part of the first fixing portion 8 as described above. That is, stress is generated at the upper connecting portion 14, corresponding to the fastening force of the fastening member fastened to the first fixing portion 8 and the size of the gap C.

[0047] On the other hand, compared to the upper connecting portion 14, the stress generated in the lower connecting portion 10, i.e., the lower connecting portion 13, in the vertical direction is smaller. Since there is a gap C between the upper portion of the first fixing portion 8 in the vertical direction and the cover member 2, the lower portion of the first fixing portion 8 in the vertical direction can abut against the cover member 2. Alternatively, the gap between the lower portion of the first fixing portion 8 in the vertical direction and the cover member 2 can be made smaller. Therefore, the stress generated in the lower connecting portion 13 due to the tightening of the bolt 11 to the first fixing portion 8 is smaller than the stress generated in the upper connecting portion 14. In addition, a strength member 12 is provided in the lower connecting portion 13 as described above. Therefore, the strength of the lower connecting portion 13 is further improved compared to the strength of the upper connecting portion 14. In particular, when a load is applied such that the first fixing portion 8 is bent with the connecting portion 10 as the boundary, the stress generated in the lower connecting portion 13 can be reduced.

[0048] In the bearing bracket 1 configured in this way, stress tends to concentrate at the lower connecting portion 13. For example, stresses (assembly stress) corresponding to the strain generated by fastening the fastening member to the first fixing portion 8 and stresses (tensile stress) corresponding to the strain generated by the bearing housing portion 5 supporting the drive shaft via the bearing are generated. That is, stress concentration caused by fastening the fastening member to the first fixing portion 8 or retaining the bearing is likely to occur at the lower connecting portion 13.

[0049] To address the stress concentration at the lower connecting portion 13, the bearing bracket 1 of this embodiment of the invention, by providing the aforementioned gap C and strength member 12, can disperse or concentrate the stress generated at the lower connecting portion 13 towards the upper connecting portion 14. That is, since the stress concentration at the lower connecting portion 13 can be mitigated, the reduction in durability at the connecting portion 10 can be suppressed.

[0050] The embodiments of this utility model have been described above, but this utility model is not limited to the examples described above, and appropriate modifications can be made within the scope of achieving the purpose of this utility model. For example, in the above embodiments, a structure in which a strength member 12 is provided in the connecting portion 10 has been described, but a structure in which only the gap C is formed without forming a strength member 12 may also be described. In addition, the gap C may also be formed by providing a height difference or the like on the surface of the first fixing portion 8 opposite to the cover member 2. That is, as long as stress concentration in the lower connecting portion 13 can be suppressed, the gap C can be of any shape.

Claims

1. A bearing bracket, comprising: A bearing retainer that holds the bearing internally with its axial direction parallel to the horizontal direction; and Multiple fixing parts are fastened relative to a counter member having a specified rigidity by fastening members. A specified fixing portion among the plurality of fixing portions is continuously formed from the bearing retaining portion and is formed on a plane orthogonal to a plane facing the axial direction of the bearing retaining portion. The bearing bracket is mounted on the opposing component by respectively fastening the fastening members at the plurality of fixed parts. The bearing bracket is characterized in that... The specified fixing part is formed as follows: With all but one of the plurality of fixing parts fastened, a gap is created between the upper portion of the specified fixing part in the vertical direction and the opposing member. The gap is eliminated by fastening the specified fixing part to the counterpart component using the fastening member.

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