JPH1018670A - Pivot coupling structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To remove a clearance between a shaft and a bearing hole by installing an elastic energizing means imparting axial deviation force between the tapered shaft section and the tapered bearing hole. SOLUTION: The pivot coupling structure is composed of a bearing bush 21 pressed into a check plate 6, etc., for an automobile door checker and a pivot shaft 8. A downward pan-shaped elastic flange 23 is connected continuously at the small-diametral end section of a tapered bearing hole 22a in the bush 21 consisting of a synthetic resin. The tapered shaft section 24 of the shaft 8 is fitted rotatably into the hole 22a while a mounting shaft section 25 is fixed into the mounting hole 30 of a bracket 7, etc., and the flange 23 is held between the plate 6 and the bracket 7 and expanded to the outside in the radial direction. When a clearance is formed between the hole 22a and the shaft section 24 by abrasion, these hole 22a and shaft section 24 are displaced relatively in the axial direction by the repulsive force of the flange 23, and the clearance is buried. Accordingly, looseness can be removed automatically without increasing parts, and the generation of an abnormal sound can be prevented, and durability can be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a pivot in which a shaft portion of a pivot shaft fixed to a first member and a bearing hole of a synthetic resin bearing bush fixed to a second member are rotatably connected to each other. It relates to a connecting structure.

[0002]

2. Description of the Related Art Such a pivot connection structure is already known, for example, as disclosed in Japanese Patent Publication No. 63-590.

[0003]

In such a pivot coupling structure, the synthetic resin bearing bush absorbs load fluctuations due to its elasticity, so that noise is unlikely to occur. As a result, when a gap is formed in the fitting portion between the pivot shaft and the bearing bush due to abrasion, there is a disadvantage that abnormal noise is generated at the fitting portion during vibration.

[0004] It is an object of the present invention to provide the above-mentioned pivot coupling structure which has solved such disadvantages.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a shaft portion of a pivot shaft fixed to a first member and a bearing hole of a synthetic resin bearing bush fixed to a second member. In the pivot connection structure in which the shaft portion and the bearing hole are rotatably fitted to each other, the shaft portion and the bearing hole are formed as a tapered shaft portion and a tapered bearing hole having the same angle of taper, and between the tapered shaft portion and the tapered bearing hole. The first feature is that elastic biasing means for applying an axial biasing force is provided to eliminate a gap between them.

In addition to the above features, the present invention provides a dish-shaped elastic flange which is provided between the first and second members by connecting the elastic urging means to one end of a bearing bush made of synthetic resin. The second feature is that it is constituted by.

Further, according to the present invention, in addition to the first or second feature, the first member is formed as one of a bracket fixed to the body of the vehicle or a check plate of a door checker attached to a door, and the second member is provided. Is the other of them.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described based on embodiments of the present invention shown in the accompanying drawings.

FIG. 1 is a perspective view of a main part of an automobile in which a door checker is mounted according to the present invention, FIG. 2 is a partially longitudinal plan view of the door checker, FIG. 3 is a view taken in the direction of arrow 3 in FIG. 2, and FIG. FIG. 5 is an enlarged sectional view taken along line 4-4, and FIG. 5 is a longitudinal sectional view of a single body of a synthetic resin bush.

First, referring to FIG.
A door D is rotatably mounted via a hinge H to open and close the entrance, and a door checker C is provided between the body B and the door D to provide the door D with an appropriate opening / closing resistance and a plurality of open positions. Is interposed.

As shown in FIGS. 2 and 3, the door checker C has a case 1 fixed to the inner surface of the end wall of the door D by bolts 2. The case 1 includes a box-shaped case main body 1a having one open end, and a cover 1b which is sandwiched between the case main body 1a and the inner surface of the end wall of the door D while covering the open end. The cover 1b and the case main body 1a are provided with through-holes 4, 5 coaxial with the through-hole 3 opening in the end wall of the door D, and these three through-holes 3, 3 are provided.
The base end of a check plate 6 (second member) penetrating through 4 and 5 is rotatably connected to a bracket 7 (first member) via a pivot shaft 8. The hinge H is arranged in parallel with the pivot axis and is fixed to the body D by bolts 9. The bracket 7 and check plate 6 pivot connection structure will be described later.

The check plate 6 is composed of a plate body 6a made of a steel plate directly connected to the bracket 7, and a synthetic resin coating 6b molded around the periphery of the plate body 6a except for both ends. Be composed. The cover 6b is formed such that the thickness of the check plate 6 is gradually increased from the base end side (the bracket 7 side) toward the free end side, and both side surfaces of the intermediate portion and the free end side end are provided. Are provided with first and second notches 10, 10; 11, 11 for narrowing the check plate 6 in the plate thickness direction, and a stopper 12 is provided adjacent to the second notches 11, 11 on the free end side thereof. 6a.

The stopper 12 is a steel plate stopper plate 14 fixed to the plate body 6a with a pin 13.
And a stopper rubber 15 attached to the stopper plate 14 and facing the second notches 11, 11.

A pair of synthetic resin shoes 16, 16 are arranged in the case 1 so as to sandwich the check plate 6 in the thickness direction thereof, and these shoes 16, 16 are pressed against both side surfaces of the check plate 6, respectively. A pair of rubber springs 17, 17, which resiliently move, are housed.

When the door D is closed, the pair of shoes 16 of the door checker C are connected to the check plate 6.
Are pressed against the both side surfaces of the cover 6b with the elastic force of the rubber springs 17, 17 at places where the plate thickness is relatively thin.

When the door D is opened from this state, the shoes 16, 16 slide on both sides of the cover 6b in the direction of increasing the thickness in response to the opening, and the rubber springs 17, 17 are compressed accordingly. Therefore, the clamping force of the shoes 16, 16 against the check plate 6, that is, the opening torque of the door D is increased by the increase of the repulsive force. Then, when the door D is opened to a predetermined intermediate opening and the shoes 16, 16 come to a position corresponding to the first notch 10 of the check plate 6, the rubber springs 17, 17 are restored and expanded, and the shoes 16, 16 are restored. Can be resiliently engaged with the notches 11, 11, and the engagement force holds the door D at the intermediate opening.

When the opening force on the door D is further increased, the shoes 16, 16 move toward the stopper 12 while compressing the rubber springs 17, 17 again, and the case 1 is elastically received by the stopper rubber 15. This defines the fully open position of the door D. At this time, shoe 1
6 and 16 engage the second notches 11 and 11 with the repulsive force of the rubber springs 17 and 17, and can maintain the fully open position of the door D by the engaging force.

Now, a pivot connection structure of the bracket 6 and the check plate 7 will be described with reference to FIGS. This pivot coupling structure is a bearing bush 21 that is press-fitted into the mounting hole 20 of the check plate 7.
And a pivot shaft 8 fixed to the bracket 6 and rotatably fitted to the bearing bush 21 as constituent elements. The bearing bush 21 is a molded body made of a synthetic resin, for example, nylon, and has a cylindrical portion 22 having a tapered bearing hole 22a.
And an elastic flange 23 (elastic biasing means) connected to the small-diameter end of the tapered bearing hole 22a in the cylindrical portion 22. The elastic flange 23 is slightly constricted in a dish shape as shown by a solid line in FIG. 5 in a free state, but returns to its original shape when it is expanded outward from the free state, for example, as shown by a chain line. Demonstrate the repulsive force.

On the other hand, the pivot shaft 8 has a tapered shaft portion 24 tapered at the same angle as the tapered bearing hole 22a, and a mounting shaft portion protruding from the small-diameter end face of the tapered shaft portion 24 leaving an annular stepped portion 27. 25 and the tapered shaft portion 2
An enlarged head 26 is continuously provided at the large-diameter end of 4. Then, the tapered shaft portion 24 is rotatably fitted into the bearing hole 1 of the bearing bush 21, and then the mounting shaft portion 25 is fitted into the bracket 6 mounting hole 30, and the annular step portion 27 is fitted to the bracket 6. The pivot shaft 8 is fixed to the bracket 6 by pressing against the side surface and caulking the tip of the mounting shaft portion 25 on the other side surface of the bracket 6 to form the enlarged end portion 28.

At this time, the dish-shaped elastic flange 23 of the bearing bush 21 is sandwiched between the bracket 6 and the check plate 7 and spreads outward in the radial direction as shown by a chain line in FIG. A gap g is provided between the enlarged head 26 of the pivot shaft 8 and the end face of the bearing bush 21 facing the enlarged head 26.

The operation of this embodiment will be described.

When the door checker C is operated with the opening and closing of the door D, relative rotation occurs between the pivot shaft 8 fixed to the bracket 6 and the bearing bush 21 made of synthetic resin fixed to the check plate 7. Since there is no metal contact portion between the bracket 6 and the check plate 7, no abnormal noise is generated.

By the way, when the elastic flange 23 of the bearing bush 21 is spread radially outward as described above,
The repulsive force separates the bracket 6 and the check plate 7 in the axial direction of the pivot shaft 8. Therefore, when a gap is formed between the tapered bearing hole 22a of the bearing bush 21 and the tapered shaft portion 24 of the pivot shaft 8 due to repeated opening and closing of the door D, the bearing bush 21 and the pivot shaft 8 are connected to the elastic flange 23. The above repulsive force causes relative displacement in the axial direction to fill the gap. The axial gap g between the enlarged head 26 of the pivot shaft 8 and the bearing bush 21 decreases with the relative displacement of the bearing bush 21 and the pivot shaft 8, but as long as the gap g exists, the tapered bearing holes 22a and The gap eliminating action between the tapered shafts 1 is maintained. Thus, play due to wear of the pivot shaft 8 and the bearing bush 21 is compensated, and generation of abnormal noise can be prevented.

The present invention is not limited to the above-described embodiment, and various design changes can be made without departing from the gist of the present invention. For example, welding or screws can be used as a means for fixing the pivot shaft 8 to the bracket 6. Further, instead of the elastic flange 23, a disc-shaped spring separated from the bearing bush 21 can be used. The pivot shaft 8 is on the check plate 6 and the bearing bush 21 is on the bracket 7.
, Respectively. Further, the pivot coupling structure of the present invention is applicable to hinges and other various rotating parts.

[0025]

As described above, according to the first aspect of the present invention, the shaft portion of the pivot shaft fixed to the first member, the bearing hole of the synthetic resin bearing bush fixed to the second member, and In the pivot connection structure in which the shaft portion and the bearing hole are rotatably fitted and connected to each other, the shaft portion and the bearing hole are formed as a tapered shaft portion and a tapered bearing hole having the same angle of taper, and between the tapered shaft portion and the tapered bearing hole, Elastic biasing means for applying a biasing force in the axial direction is provided so as to eliminate the gap between them, so that even if the pivot shaft and the bearing bush are worn at the fitting portion, the tapered shaft portion, the tapered bearing hole and the elasticity are provided. By the cooperation of the flanges, play due to wear can be automatically eliminated, and generation of abnormal noise can be prevented.

According to a second feature of the present invention, the elastic urging means is connected to one end of a bearing bush made of synthetic resin and is provided with a dish-shaped elastic member interposed between the first and second members. Since it is constituted by the flange, the above-described effect can be obtained without increasing the number of parts and therefore without increasing the cost.

According to a third aspect of the present invention, the first member is one of a bracket fixed to a vehicle body or a check plate of a door checker attached to a door, and the second member is the other of them. So,
It is possible to obtain a door checker coupling structure that is always quiet and has excellent durability.

[Brief description of the drawings]

FIG. 1 is a perspective view of a main part of an automobile having a door checker attached according to the present invention.

FIG. 2 is a partial longitudinal plan view of the door checker.

FIG. 3 is a view taken in the direction of arrow 3 in FIG. 2;

FIG. 4 is an enlarged sectional view taken along line 4-4 in FIG. 3;

FIG. 5 is a longitudinal sectional view of a single body of a synthetic resin bush.

[Explanation of symbols]

 B Body C Door checker D Door 6 Check plate as second member 7 Bracket as first member 8 Pivot shaft 21 Bearing bush 22a Tapered bearing hole 23 Elastic flange as elastic means 24 Tapered shaft

Claims (3)

[Claims] 1. A shaft portion of a pivot shaft (8) fixed to a first member (7) and a bearing hole of a synthetic resin bearing bush (21) fixed to a second member (6) are rotatable. In the pivot connection structure, the shaft portion and the bearing hole are formed into a tapered shaft portion (24) and a tapered bearing hole (22a) tapered at the same angle with each other. Taper bearing hole (22
a) a pivot coupling structure provided with elastic biasing means for applying an axial biasing force to eliminate a gap between them; 2. The bearing bush according to claim 1, wherein said elastic urging means is a bearing bush made of synthetic resin.
A pivot coupling structure comprising a dish-shaped elastic flange (23) connected to one end of (1) and interposed between the first and second members (7, 6). 3. The check plate of a door checker (C), wherein the first member (7) is attached to a bracket or a door (D) fixed to a body (B) of an automobile. Wherein the second member (6) is the other of the two.