JP5700399B2 - Rotating shaft structure - Google Patents

Description

  The present invention relates to a rotating shaft structure provided in an overhead console device for a vehicle or the like.

  Japanese Unexamined Patent Application Publication No. 2008-221870 has a bearing provided on a fixed member (overhead console body) and a shaft provided on a movable member (storage case), and the movable member is opened and closed with respect to the fixed member. A pivot shaft structure that enables pivoting to a position is disclosed. In the structure disclosed in the publication, the cross-sectional shapes of the shaft and the bearing are both circular.

However, the conventional rotating shaft part structure has the following problems.
Since the cross-sectional shapes of the shaft and the bearing are both circular, the radial clearance (clearance) between the shaft and the bearing is always constant regardless of the rotational position (open / close position) of the movable member with respect to the fixed member.
Therefore, if the radial clearance between the shaft and the bearing is relatively large in order to smoothly rotate (open / close) the movable member with respect to the fixed member, the movable member may rattle with respect to the fixed member. The amount that can be produced becomes relatively large, and the rattling noise due to vehicle running vibration or the like when the movable member is in the closed position (when the apparatus is not used) becomes relatively large.
On the other hand, if the radial clearance between the shaft and the bearing is relatively small in order to reduce the rattling noise when the movable member is in the closed position, the movable member can be smoothly rotated with respect to the fixed member. Will become difficult. Moreover, it becomes difficult to insert the shaft into the bearing, and the workability of assembling the movable member to the fixed member is deteriorated.
Therefore, it is difficult to satisfy both the requirements of “smooth rotation of the movable member” and “reducing backlash noise when the movable member is in the closed position”.

JP 2008-221870 A

  An object of the present invention is to provide a rotation shaft portion structure that can satisfy both of smooth rotation of a movable member and reduction of loose noise when the movable member is in a closed position.

The present invention for achieving the above object is as follows.
(1) A shaft provided on one of the fixed member and the movable member, and a bearing provided on the other of the fixed member and the movable member for receiving the shaft, wherein the movable member is opened with respect to the fixed member. A pivot shaft structure that is pivotable between a position and a closed position,
The cross-sectional shape of the axis is an elliptical shape,
The transverse cross-sectional shape of the bearing is the same as or substantially the same as the length of the long axis direction of the shaft in the first direction which is the long axis direction of the shaft when the movable member is in the closed position. The length in a direction different from the first direction is larger than the length in the first direction of the bearing, and is a non-circular shape .
When the movable member is at a midway position between the closed position and the open position, the radial gap between the shaft and the bearing in the major axis direction in a cross-sectional view of the shaft is the A rotating shaft part structure that is larger than a radial gap between the shaft and the bearing in a major axis direction in a cross-sectional view of the shaft when the movable member is in the open position .
(2) The rotating shaft structure according to (1), wherein both surfaces of the bearing in the first direction are planes orthogonal to the first direction.

According to the rotating shaft part structure of (1) above, the following effects can be obtained.
(I) The length of the bearing in the first direction, which is the major axis direction of the shaft when the movable member is in the closed position, is the same as or substantially the same as the length in the major axis direction of the shaft. Thus, the radial clearance (clearance) in the first direction between the shaft and the bearing can be zero or substantially zero when the movable member is in the closed position. Therefore, it is possible to prevent the shaft from rattling in the bearing due to vehicle running vibration or the like when the movable member is in the closed position, that is, the movable member from rattling to the fixed member. Therefore, the rattling noise when the movable member is in the closed position can be reduced as compared with the conventional case.
Further, (ii) in the cross-sectional view of the bearing, the length of the bearing in a direction different from the first direction is larger than the length of the bearing in the first direction, so that the movable member is positioned at a position other than the closed position. In this case, it is possible to secure a radial clearance (clearance) between the shaft and the bearing for smoothly moving the movable member with respect to the fixed member.
Therefore, from the above (i) and (ii), both the smooth rotation of the movable member and the reduction of rattling noise when the movable member is in the closed position can be satisfied.

According to the rotating shaft part structure of (2) above, the following effects can be obtained.
Since both surfaces of the bearing in the first direction are planes orthogonal to the first direction, the management surface is a curved surface by using the both surfaces as a management surface for obtaining the dimensional accuracy of the bearing. Thus, the radial clearance in the first direction between the shaft and the bearing when the movable member is in the closed position can be made relatively easily zero or substantially zero.

It is a disassembled perspective view of the interior apparatus for vehicles provided with the rotating shaft part structure of the Example of this invention. It is sectional drawing which shows the time when a movable member is in a closed position with a solid line, and the time when a movable member is in an open position with a dashed-two dotted line of a vehicle interior device provided with a rotating shaft part structure of an embodiment of the present invention. . It is an expanded sectional view in case the movable member exists in a closed position of the rotating shaft part structure of an Example of this invention. It is an expansion schematic diagram when the movable member exists in a closed position of the rotating shaft part structure of this invention Example. It is an expansion schematic diagram when the movable member exists in an open position of the rotating shaft part structure of an Example of this invention.

Below, with reference to FIGS. 1-5, the rotating shaft part structure of the Example of this invention is demonstrated.
As shown in FIG. 1, a rotating shaft part structure (turning shaft part device) 10 according to an embodiment of the present invention is arranged on a ceiling on the vehicle front side of an automobile and has a space for storing small items such as sunglasses. It is provided in the vehicle interior device 1 such as a console device. However, the vehicle interior device 1 provided with the rotating shaft part structure 10 is not limited to the vehicle overhead console device, but may be a vehicle conversation mirror device, or an instrument which is a vehicle interior member. It may be a cup holder device for a vehicle, an accessory case for a vehicle, or the like arranged on a panel or a console panel. Hereinafter, in the embodiment of the present invention and the illustrated example, the case where the vehicle interior device 1 provided with the rotating shaft portion structure 10 is a vehicle overhead console device will be described as an example.

  The vehicle interior device 1 includes a fixed member 2, a movable member 3, and a lock device 4.

  The fixing member 2 is made of resin and is a molded product. The fixing member 2 is formed integrally with an overhead console (not shown) that is an interior member of the vehicle, or is formed separately from the overhead console and fixedly attached to the overhead console. The fixing member 2 includes a recess 2a that opens downward.

  The movable member 3 is made of resin and is a molded product. As shown in FIG. 2, the movable member 3 is rotatable relative to the fixed member 2 between an open position 3 a and a closed position 3 b. In addition, the open position 3a indicates that the movable member 3 rotates 90 degrees (including substantially 90 degrees) downward from the closed position 3b with respect to the fixed member 2 as indicated by a two-dot chain line in FIG. Most of this is protruding downward from the recess 2a, and the opening of the recess 2a is not closed (opened) by the movable member 3. Further, as shown by the solid line in FIG. 2, the closed position 3b is movable while the movable member 3 is not rotated downward with respect to the fixed member 2 and the entire movable member 3 or substantially the whole enters the recess 2a. This is the position where the member 3 closes the opening of the recess 2a.

The movable member 3 has a flat plate shape or a substantially flat plate shape, and when the movable member 3 is in the closed position 3b, the lower surface forms a design surface, and when the movable member 3 is in the closed position 3b, it projects upward from the design wall 3c. Projecting wall 3d.
When the movable member 3 is in the closed position 3b, the cross-sectional shape of the protruding wall 3d when cut along a plane perpendicular to the protruding direction (upward and vertical directions) from the design wall 3c is a U-shape that opens to the front of the vehicle. Alternatively, it is U-shaped (including a substantially U-shape or a substantially U-shape).

  The locking device 4 locks (holds) the movable member 3 with respect to the fixed member 2 at the closed position 3b, and pushes the movable member 3 at the closed position 3b to push the lock release button 4a with the movable member 3. It is a device for unlocking by pressing or directly pressing the unlock button 4a.

  As shown in FIG. 1, the rotating shaft structure 10 includes a shaft 20 provided on one of the fixed member 2 and the movable member 3, and a bearing 30 provided on the other of the fixed member 2 and the movable member 3 and receiving the shaft 20. The movable member 3 can be rotated to the open position 3 a and the closed position 3 b with respect to the fixed member 2. In the following, in the embodiment of the present invention, the case where the shaft 20 is provided on the movable member 3 and the bearing 30 is provided on the fixed member 2 will be described.

  The shaft 20 is formed on the movable member 3. The shaft 20 may be formed integrally with the movable member 3, may be formed separately from the movable member 3, and may be fixedly attached to the movable member 3. One shaft 20 is provided at each end of the movable member 3 in the left-right direction of the vehicle or in the vicinity thereof (a pair of shafts 20 are provided corresponding to both sides of the movable member 3 in the left-right direction of the vehicle). The shaft 20 is formed on the vehicle lateral direction outer side surface of the vehicle lateral direction both ends of the protruding wall 3d of the movable member 3. The shaft 20 protrudes outward from the protruding wall 3d in the left-right direction of the vehicle.

  As shown in FIG. 3, the cross-sectional shape of the shaft 20 (the shape when cut along a plane perpendicular to the vehicle left-right direction and the shape when cut along a plane perpendicular to the pivot axis of the movable member 3) is long. The length (major axis) in the axial direction is D1, and the length (minor axis) in the minor axis direction is D2 (<D1). Since the shaft 20 has an elliptical shape, the radial clearance (clearance) between the shaft 20 and the bearing 30 can be changed by rotating the shaft 20 in the bearing 30.

  As shown in FIG. 1, the bearing 30 is formed on the fixed member 2 and receives the shaft 20 and supports the shaft 20 so as to be rotatable (rotatably slidable). The bearing 30 is formed on both side walls 2b in the vehicle left-right direction of the vehicle interior device 1 among the side walls forming the recess 2a of the fixing member 2. The bearing 50 is a hole that penetrates the side wall 2b.

As shown in FIG. 3, the cross-sectional shape of the bearing 30 (the shape when cut along a plane orthogonal to the vehicle left-right direction and the shape when cut along a plane orthogonal to the rotational axis of the movable member 3) Circular shape. Specifically, the cross-sectional shape of the bearing 30 is a non-circular shape that satisfies the following (a) to (b), preferably (a) to (c), and more preferably (a) to (d). .
(A) The length (inner diameter) L1 in the first direction A, which is the long axis direction in the cross sectional view of the shaft 20 when the movable member 3 is in the closed position 3b, is the long axis direction in the cross sectional view of the shaft 20 It is the same as or substantially the same as the length D1 (slightly larger than D1). The “first direction” is, for example, a vertical direction in which the influence of vehicle running vibration is relatively large. Further, the reason that “same or substantially the same” is used instead of “same” is due to consideration of variations of the shaft 20 and the bearing 30 individually.
(B) The length in a direction different from the first direction A, that is, the length L2 in the second direction B, which is a direction orthogonal to the first direction A, and the first direction A and the second direction B The length in the direction other than is greater than the length L1 of the bearing 30 in the first direction A.
(C) Both surfaces (both end surfaces) 31 and 32 in the first direction A of the bearing 30 are planes orthogonal to the first direction A.
(D) A radial clearance between the shaft 20 and the bearing 30 in the long axis direction in a cross-sectional view of the shaft 20 when the movable member 3 is in the middle position between the closed position 3b and the open position 3a ( The clearance) is larger than the radial gap (clearance) between the shaft 20 and the bearing 30 in the long axis direction when the movable member 3 is in the open position 3a in the cross-sectional view of the shaft 20. The “halfway position” is a position when the movable member 30 is rotated 45 ° ± 15 ° from the closed position 30b to the open position 30a with respect to the fixed member 20.

As long as the cross-sectional shape of the bearing 50 can satisfy all of the above (a) to (d), it may be a barrel shape as shown in FIGS. It may be a polygonal shape.
From (a) and (b) above, as shown in FIG. 3, L2> L1 ≧ D1> D2 holds.

Next, the operation of the embodiment of the present invention will be described.
(I) The length L1 in the first direction A, which is the major axis direction of the shaft 20 when the movable member 3 is in the closed position 3b, is the major axis of the shaft 20 in a cross-sectional view of the bearing 30. Since the length D1 is the same or substantially the same, the radial gap (clearance) in the first direction A between the shaft 20 and the bearing 30 is zero or substantially zero when the movable member 3 is in the closed position 3b. Can be. Therefore, when the movable member 3b is in the closed position 3b, it is possible to prevent the shaft 20 from rattling in the bearing 30 due to vehicle running vibration or the like, that is, the movable member 3 from rattling to the fixed member 2. Therefore, the rattling noise when the movable member 3 is in the closed position 3b can be reduced as compared with the conventional case.
Further, (ii) in the cross-sectional view of the bearing 30, the length of the bearing 30 in the direction different from the first direction A is larger than the length L1 of the bearing 30 in the first direction A. When the member 3 is in a position other than the closed position 3b, it is possible to secure a radial clearance (clearance) between the shaft 20 and the bearing 30 for the movable member 3 to smoothly rotate with respect to the fixed member 2. it can.
Therefore, both (i) and (ii) can satisfy both the smooth rotation of the movable member 3 and the reduction of loose noise when the movable member 3 is in the closed position 3b.

Since both surfaces 31 and 32 in the first direction A of the bearing 30 are planes orthogonal to the first direction A, the both surfaces 31 and 32 are used as control surfaces for determining the dimensional accuracy of the bearing 30. Compared to the case where the management surface is a curved surface, the dimensional accuracy of the bearing 30 (die adjustment) can be easily obtained. Therefore, compared with the case where the management surface is a curved surface, the radial gap (clearance) in the first direction A between the shaft 20 and the bearing 30 when the movable member 3 is in the closed position 3b is relatively easy. Can be zero or nearly zero.

When the movable member 3 is in the middle position between the closed position 3b and the open position 3a, there is a radial clearance (clearance) between the shaft 20 and the bearing 30 in the long axis direction in a cross-sectional view of the shaft 20. When the movable member 3 is in the open position 3a, the radial gap (clearance) between the shaft 20 and the bearing 30 in the major axis direction in the cross-sectional view of the shaft 20 is larger. Further, the midway position is a position when the movable member 30 is rotated 45 ° ± 15 ° from the closed position 30b to the open position 30a with respect to the fixed member 20.
Therefore, the assembly operator can assemble the movable member 3 to the fixed member 2 by holding the movable member 3 at an angle at which it can be easily held.

When the movable member 3 is in the middle position between the closed position 3b and the open position 3a, there is a radial clearance (clearance) between the shaft 20 and the bearing 30 in the long axis direction in a cross-sectional view of the shaft 20. When the movable member 3 is in the open position 3a, the radial gap (clearance) between the shaft 20 and the bearing 30 in the major axis direction in the cross-sectional view of the shaft 20 is larger. That is, when the movable member 3 is in the open position 3a, the radial gap (clearance) between the shaft 20 and the bearing 30 in the long axis direction in the cross-sectional view of the shaft 20 is such that the movable member 3 is in the closed position 3b. And a radial clearance (clearance) between the shaft 20 and the bearing 30 in the major axis direction in a cross-sectional view of the shaft 20 when in the midway position between the shaft 20 and the open position 3a.
Therefore, when the movable member 3 is in the open position 3a, it is possible to suppress the shaft 20 from rattling in the bearing 30 due to vehicle running vibration or the like, that is, the movable member 3 from rattling to the fixed member 2.

DESCRIPTION OF SYMBOLS 1 Vehicle interior apparatus 2 Fixed member 3 Movable member 3a Open position 3b Closed position 4 Locking device 10 Rotating shaft part structure 20 Axis 30 Bearings 31 and 32 Both surfaces A in the first direction A First direction B Second direction

Claims (2)

A shaft provided on one of the fixed member and the movable member, and a bearing provided on the other of the fixed member and the movable member for receiving the shaft, wherein the movable member is opened and closed with respect to the fixed member. A pivot shaft structure that is pivotable to a position,
The cross-sectional shape of the axis is an elliptical shape,
The transverse cross-sectional shape of the bearing is the same as or substantially the same as the length of the long axis direction of the shaft in the first direction which is the long axis direction of the shaft when the movable member is in the closed position. The length in a direction different from the first direction is larger than the length in the first direction of the bearing, and is a non-circular shape .
When the movable member is at a midway position between the closed position and the open position, the radial gap between the shaft and the bearing in the major axis direction in a cross-sectional view of the shaft is the A rotating shaft part structure that is larger than a radial gap between the shaft and the bearing in a major axis direction in a cross-sectional view of the shaft when the movable member is in the open position . The rotating shaft part structure according to claim 1, wherein both surfaces of the bearing in the first direction are planes orthogonal to the first direction.

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