JPS59200809A - Freely rotatable supporting structure for shaft-shaped member - Google Patents

Abstract

PURPOSE:To enable to support the shaft-shaped member in freely rotatable manner as well as obtaining of sufficient sealing effect by a method wherein an abutting surface forming a spherical surface which has the mutual compensating relation with a supporting surface is provided on a shaft-shaped member, then the abutting surface is abutted against a supporting surface which has a concave hemispherical-shaped surface on a supporting member. CONSTITUTION:A swing arm 49 is connectingly supported in freely swingable manner for a bracket 36 with a support point of a supporting shaft 51, one end of the swing arm is connected with a leveling drive part 4 via a connecting rod 56. A supporting surface 58 is formed on the top of the other arm 57 of the swing arm 49, the suppoting surface is opened toward the back side of a body 1 and formed in concave hemispherical shape. Meanwhile, a spherical protrusion part 65 having a abutting surface formed in spherical surface is structured at one end of a shaft part of an adjusting screw 63. The supporting surface 58 is formed on the top of the other arm 57 of the swing arm 49. The spherical surface of the protrusion part 65 is structured with mutual compensating relation with the supporting surface 58, those part and surface are contacted closely each other.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a novel structure for rotatably supporting a shaft-like member. Specifically, it is a structure in which a shaft-like member is rotatably supported with respect to a support member, and the part of the shaft-like member γ; The present invention is intended to provide a structure for rotatably supporting a shaft-like member that has waterproof and dustproof effects on the supporting portion.

BACKGROUND TECHNOLOGY AND PROBLEMS The structure in which the intermediate or end portion of the shaft-like member is rotatably supported by the supporting member includes, for example, aiming and/or leveling in a vehicle headlamp. There is a structure in which an adjustment screw for adjusting the adjustment is rotatably supported on a part of the vehicle body, a casing of an adjustment mechanism, or a lamp body.

To put this structure in concrete terms, for example, the reflector is supported within the lamp body in a state with zero tilting, and the tip of the adjustment screw, which is formed with a flange-like 7-top at the rear end 81, is attached to the lamp body. The adjustment screw is inserted into the lamp body through an insertion hole formed in the lamp body, and the tip of the adjusting screw is connected to a part of the reflector. It is necessary to seal the hole using a suitable sealing means.
This is to prevent rainwater, dust, etc. from entering the lamp body through the insertion hole, and is especially necessary for a mechanism with a complicated electrical and optical structure like the front lamp. It is a process.

Conventionally, as a means for such a sealing process, for example, a sealing material such as a backing or an O-ring is interposed between a stopper formed on the adjustment screw and the opening edge of the insertion hole, or a A method of covering the space between the opening edge and the outer peripheral surface of the adjustment screw with a comb cover or the like has been used. However, such sealing means
Seals require special materials, which increases the number of assembly steps and costs. Further, there is also a problem in the resistance to force of the sealing member. Moreover, even though special sealing members are used, it is only possible to increase the sealing area.
The sealing effect may be insufficient, and the sealing element may also impede the smooth rotational movement of the adjusting screw.

OBJECT OF THE INVENTION Therefore, the present invention improves the part where the shaft-like member is supported by the support member, thereby improving the sealing effect without using a special sealing member in that part. The present invention aims to provide a structure for rotatably supporting a novel shaft-shaped member, which can reduce the number of parts without impairing the smooth rotation of the member, reliably obtain a sole effect, and has improved durability. It is.

Summary of the Invention The structure for rotatably supporting the shaft-shaped member of the present invention includes an insertion hole through which one lib is inserted into the support member, and a quadrangular hemispherical shape with the insertion hole as the top, in order to achieve the arrangement. A spherical contact surface having a complementary relationship with the support surface described in A) is formed on the annular member. It is characterized by being brought into close contact with the

By doing this, the ring-shaped member can be supported 81; a novel shaft-shaped member that can be rotatably supported against the material and has a sealing effect without using a special sealing member. structure can be provided.

EXAMPLES Below, details of the structure for rotatably supporting the shaft-like member of the present invention will be explained according to the examples shown in the accompanying drawings.

1/1 In the embodiment shown, the shaft-like member according to the present invention is rotated 1-
This structure is applied to a structure that rotatably supports an adjustment screw for adjusting the irradiation angle in a vehicle foresight device.

3 is a body made of synthetic resin, with a large opening at the front and an insertion hole 2 at the center of the rear. 3 is a lens, which has a low trapezoidal shape that protrudes forward, and a flange 5 with a small protrusion formed on the rear edge of the lens.
is placed in the mounting groove 4 provided on the opening edge of the body 1 via the gasket 6.
The rear surface and the front of the flange 5 of the lens 3 are engaged with a metal clip 7 having a C-shaped cross section, and the lens 3 or 1 is attached to the body 1.
．． i; + is determined. A metal reflecting mirror 8 is arranged within a lamp space 5 defined by the body 1 and the lens 3. The reflecting mirror 8 is connected to the body 1 at three points. That is, when viewed from the front view (Fig. 1), the left 1. A line extended horizontally from point A by the rotation fulcrum mechanism at point A.
By the aiming mechanism at point B near the right end of
Six points close to the lower end of a line 1- extending perpendicularly from point A are successively aged by an aiming mechanism and a leveling mechanism. Rotating fulcrum machine 4II at point A
I+9 is constituted by a spherical projection IO protruding from the body 1 and four spherical parts 11 formed on the reflecting mirror 8. 1
2 is a rondo with a spherical protrusion 10 on one end and a shrimp on the other end:)
1° 413 is formed, and the groove 13 is screwed onto the boss portion 14 formed on the pot l.
or fixed to the support member 1. Reference numeral 15 is a block made of synthetic resin and has four spherical parts 11 that are open at the rear.This block 15 is fixed to a bracket 16 fixed to the rear surface of the opening edge of the reflector 8. Zlok 1
The spherical recess 11 of 5 has the opening y F' 12 spherical kiln holder 1
0 is fitted, and a silicon joint-like rotation fulcrum mechanism 9 is constructed here.

The aiming mechanism 17 at point B rotates 1 to the body 1;
It consists of an adjusting screw 18 supported at one end and a nut 19 supported by a reflecting mirror 8. The NAND 19 is formed of synthetic resin into a square block shape, and has a hole (not shown) penetrating the center thereof from front to back.

An annular convex portion 20 is formed around the through hole on the rear surface of the oak 19. Further, on both sides of the NAND 19, engagement grooves 21 extending in a direction perpendicular to the axial direction of the hole are provided.
The two opposing surfaces constituting this engaging groove 21 are curved surfaces that are closest to each other at the center in the direction in which the groove 21 extends and are most curved at both ends. There is. Reference numeral 22 denotes a metal bracket, which is fixed to the rear surface of the opening l:J edge of the reflector 8 by a welding bolt 9, and extends rearward from the rear end of the leg 22a at right angles to the rotation fulcrum mechanism 9. The supporting piece 22b is also integrally formed. The support piece 22b is formed with a long groove-shaped engagement notch (T shown in the figure) that opens at the tip. Thus, the both side edges of this engagement notch are engaged by 7+ and 19 (i+!). 2
1, the nut 19 is engaged with the bracket!・
The supporting piece 22b of 22 is slidably supported by a notch provided therein. 23 is the lamp tenon.・1 Nando], 91F! This is an adjusting screw support portion formed at a location corresponding to the /A'-J position, and is formed as a boss portion that protrudes toward the +iij force. This screw support part 23 is formed with an insertion hole 24 that passes through it back and forth. A flange 25 is formed in the middle part of the adjusting screw 18, and the adjusting screw 18 is connected to the flange 25.
5 comes into contact with the rear surface of the support part 23 of the body 1.
It is inserted from the rear through the insertion hole 241 formed in the hole 241, and its tip is screwed into the hole in the neck I-19. And Nando 1
A compression coil spring 26 is inserted between the rear surface of the screw support 9 and the screw support 23 . At this time, the front end of the coil spring 26 is connected to the annular protrusion 2 formed on the nut 19.
0, and the rear end portion is fitted externally to the boss-shaped support portion 23, thereby stably positioning both ends of the coil spring 26.

By operating the adjusting screw 18, the adjusting screw 1 of the reflecting mirror 8 can be adjusted.
8 is displaced in the front-back direction. That is, when the adjusting screw 18 is rotated so as to be screwed into the nut 19, the adjusting screw 18 cannot be moved in the front-rear direction with respect to the body 1 (the flange 25 and the spring 26 ), the nut 190b 3 is moved rearward along the azimuth screw 18, and the portion of the reflector 8 holding the bore l-19 is therefore displaced rearward. Similarly, when the adjusting screw 18 is unscrewed from the nut 19, the nut 19 is moved forward, thus causing the corresponding portion of the reflector 8 to be deflected forward.

Next, a composite adjustment mechanism 27 in which an aiming mechanism at the zero point and a leveling mechanism are integrated will be described. The support structure of the present invention is specifically applied to a structure that supports the adjustment screw in this adjustment mechanism 27.

28 is an opening formed on the rear surface of the body l;
A cylindrical insertion portion 29 projecting forward is formed at a position spaced apart from the opening edge of 8, and an insertion hole 30 is formed in the front end surface of the insertion portion 29. Reference numeral 31 denotes a bracket, which is fixed to the rear surface of the opening edge of the reflecting mirror 8 by welding or the like, and has a support piece 31b bent at right angles from the rear end of the leg portion 31a extending rearward and in a direction intersecting the axis of the adjustment mechanism 27. ing. The support piece 31b is formed with an engagement notch 32 that opens at the tip. 33 is a nut formed into a square block shape from synthetic resin.

The nut 33 is formed with a hole 34 that passes through its center back and forth, and on both sides of the nut 33 are formed engaging holes 35 that extend in a direction perpendicular to the axial direction of the hole 34. The two opposing surfaces constituting this retaining groove 35 are curved surfaces that are closest to each other at the center in the direction in which the groove 35 extends, and are closest to each other at both ends. As a result, both side edges of the engagement notch 32 of the bracket 31 engage with the engagement tM 35 of the nuts I and 33, so that the nut 33 is attached to the bracket!・31 support pieces 31b
It is supported so that it can slide iIf along a notch 32 provided therein.

Reference numeral 36 denotes a bladder having an abbreviated cross section fixed to the rear surface of the body 1; 38
The portion yas that approaches the position where the bracket 36 is bent into an L-shape is a support piece 39 that projects in a chevron shape toward the rear horn. An opening L-140 corresponding to the opening 128 of the body 1 is formed in the additional edition ya+ 37 of the bracket 36. It is fixed to body 1 by this.Bracket I・36 special issue ff
A leveling drive unit 43 is attached to a holding piece 42 bent into an L-shape from one end of 1i 37. this,
Leveling drive section "x+: 43 is a pressure type one. The leveling drive section 43 is an automatic or hair movement (not shown) via a cylinder 44 and a piston 45, and a static pressure pipe 46. The imitation part and the law ν, said 1.%l, made 81
According to the change in the 1,4 pressure in the shilling 44 due to the operation of 1, the screw 45 or 45 is cut down. And then, this Reherin Bu! 1, a spherical 111th eye: H47 is formed at the tip of the bisj・nl↓5 of the motion r'i:I 43. 48 is flake)
・It is a supplementary hole formed in the holding piece 42 of 36, and
The ring 44 of the ring drive unit 43 is inserted into this additional hole 48, and is fixedly secured to the holding piece 42 by a protrusion that does not disturb the ring 44 and a wave one not shown. .

49 is a two-stroke arm bent into an abbreviated shape;
An oily fulcrum III is provided at the bent portion of the swing I rib arm 49.
150.50 force), and the pivot 51 supported by the support piece 39 of the bracket 36 is inserted into the pivot shaft 50.50 of the pivot arm 49, so that the pivot arm 49 is supported on the bracket 36 so as to be freely swingable. A spherical recess 53 that opens toward the tip of the piston 45 of the leveling drive section 43 is formed at the tip of one arm 52 of the swing arm 49 that is bent toward the rear of the body l. spheres 54 and 5
One sphere 54 of the connecting rod 56 with 5 is the swinging arm 4
9, and the other sphere 55 is fitted into the spherical recess 47 at the tip of the piston 45, thereby connecting the piston 45 and one end of the swing arm 49. Further, the other arm 57 of the swinging arm 49 extends along the rear surface thereof, and at the tip of the other arm 57, a support surface 58 is formed which is open toward the rear of the body 1 and has a quadrangular hemispherical shape. An insertion hole 59 is formed at the top of the support surface 58 .

Reference numeral 60 denotes a ring fitted to the opening edge of the opening 28 formed in the body 1. Further, 61 is a bellows-shaped rubber cover that is expandable and retractable in the front and back direction, and the rubber cover 6
One open end of the ring is tightly fitted into the inner peripheral surface of the ring, and the other opening is connected to the other arm 5 of the swing arm 49.
It is fitted around the outer peripheral surface of an annular protrusion 62 formed on the front surface of the tip of 7 in a thread-like manner.

Reference numeral 63 denotes an adjustment screw, and a screw groove 64 is formed on the outer peripheral surface of at least the -☆1 part of the shaft portion of the adjustment screw 63, and a spherical abutment is formed on the other end of the shaft portion. A spherical protrusion 65 having a surface is formed. This protrusion 6
The spherical surface of 5 is formed to be complementary to the four hemispherical surfaces of the support surface 58 formed at the tip of the other arm 57 of the swing arm 49, and the protrusion 65 is engaged with the support surface 58. In this case, substantially the entire spherical surface of the protrusion can be electrically connected to the four hemispherical surfaces of the support surface. 66 is a regular hexagonal head formed at the rear end of the adjustment screw 63. The tip of the adjustment screw 63 is connected to the insertion hole 59 formed in the swing arm 49, the opening 40 of the bracket 36 into which the rubber force /<-61 is fitted, the opening 28 on the rear surface of the body, and the insertion portion 29. is inserted into the body through the insertion hole 30, and is screwed into the hole 34 of the nut 33,
Further, a spherical protrusion 65 at the rear end is pressed against a support surface 58 formed on the swing arm 49. As a result, the tip of the adjustment screw 63 is connected to a part of the reflecting mirror, and is rotatably supported by the swing arm 49. A coil spring 67 is fitted onto the shaft of the adjustment screw 63, and the coil spring 67 is in a compressed state W between the vicinity of the opening of the insertion hole 59 of the swing arm 49 and the rear surface of the nut 33. , is inserted. Therefore,
The adjustment screw 63 is always urged to move forward by the elastic force of the coil spring 67, and as a result, the spherical protrusion 65 of the adjustment screw 63 is pressed against the support surface 5 of the swing arm 49, and the protrusion is pressed against the support surface 5 of the swing arm 49. The spherical contact surface of the portion 65 and the concave hemispherical support surface 58 are brought into close contact with each other.

In addition, this allows the insertion hole 5 formed at the top of the support surface to
9 seals are made.

In the vehicle headlamp device configured as described below, the tilting of the reflecting mirror 8, which is the tilting member, is performed as follows.

First, initial aiming is performed by operating the adjuster screw 18 or adjustment screw 63.

When the adjusting screw 18 at point B is lifted, the part of the reflecting mirror 8 connected to the adjusting screw 18 is moved forward and backward, so that the reflecting mirror 8 is moved backwards at point A. The connection point (the connection point between the sphere 10 and the spherical recess 11 in the rotation fulcrum mechanism 9 and the connection point at the 0 point)
Nut 33 and bracket 31 in composite adjustment mechanism 27
It will be tilted by using the line fliIj connecting the points connected to each other. In addition, the composite adjustment mechanism 2 at the 0 point
When the adjusting screw 63 of No. 7 is rotated, the nut 33 is moved along the axial direction of the adjusting screw, and the reflecting mirror 8 is moved in the axial direction of the adjusting screw 63 so that the part where the bracket 31 that is engaged with the nut 33 is fixed is fixed. is moved along. Therefore, by operating the adjusting switch 63, the reflecting mirror 8 is tilted about the line connecting the connecting point at point A and the connecting point at point B (the connecting point between the nut 20 and the bracket 22). That will happen. still,
When the adjustment screw 63 is rotated, the spherical protrusion 6
The spherical contact surface 5 is rotated while remaining in close contact with the hemispherical support surface 58.

Next, let's talk about leveling. When the operating section (not shown) of the leveling drive section is operated, the leveling drive section 43
The hydraulic pressure inside the cylinder 44 is changed, and the piston 45 is moved forward or backward relative to the cylinder 44. Then, since the swinging arm 49 whose one arm 52 is connected to the piston 45 is rotated about the fulcrum shaft 50, the other bowl 57 of the swinging arm 49 remains holding the adjustment screw 63. The bracket 31 is swung along the axial direction of the approximately JμI adjustment screw 63, and thereby the bracket 31 is swung along the axial direction of the adjustment screw 63.
is moved along the axial direction. Therefore, the reflecting mirror 8 is tilted about the line connecting the connection point at point A and the connection point at point B. Note that when the swing arm 49 is rotated,
The spherical abutment surface of the spherical protrusion 65 of the adjustment screw 63 is rotated slightly while remaining in contact with the hemispherical support surface 58 . As the swing arm 49 rotates, the rubber cover 61 expands and contracts.

68 is a flanged light bulb attached to a mounting hole 69 formed at the rear of the reflector 8; 70 is a rubber cover; a base 72 of the light bulb 68 is fitted into a hole 71 provided in the center; The outer portion 73 is fitted onto the outer side of the rear insertion hole 2 of the body 1.

Note that a lubricant such as grease may be applied between the spherical contact surface of the protrusion of the adjustment screw 63 and the hemispherical support surface 58 in order to ensure smooth sliding movement between the two surfaces. , the lubricant can further increase the sealing effect due to the bonding of the two surfaces.

Incidentally, in the above-mentioned embodiment, an example was shown in which the adjustment screw 63, which is a shaft-like member, can be used for both aiming and leveling adjustment, but it is not possible to use the adjustment screw 63 only for aiming adjustment. It can also be used as a drive shaft. In this case, the spherical protrusion 65 of the adjustment screw 63 can be directly supported on the rear surface of the body 1, and it is preferable to form a support surface 58 on the rear surface of the body 1 to support the spherical protrusion 65. stomach.

In the above embodiments, the support structure according to the present invention is applied to a mechanism for rotatably supporting an adjustment screw in a vehicle headlamp, but the present invention is not limited thereto, and may include, for example, The present invention can be applied to various fields such as a structure in which a dial operating shaft of a household electrical appliance is rotatably supported on a support member such as a panel.

Effects of the Invention As is clear from the description in J2, the structure for rotatably supporting the shaft-like member according to the present invention includes an insertion hole through which the shaft-like member is inserted into the support S++ material, and a top portion of the insertion hole. A spherical contact surface having a complementary relationship with the support surface is formed on the shaft-like member, and the spherical contact surface of the shaft-like member is connected to the four hemispheres of the support member. The fact that it is brought into V-contact with the planar support surface is referred to as the 4-'f feature.

Therefore, according to the present invention, the shaft-like member can be supported rotatably with respect to the support member without impairing smooth rotational movement, and the annular member can be rotatably supported with respect to the support member. It is possible to seal the supported part without applying a special sealing member to the supported part. In particular, axial%
Since the lithium material is supported in contact with the support member and is formed in a spherical shape, the sealing area at the support portion can be significantly increased, and therefore a reliable and sufficient sealing effect can be obtained. I can do it.

Therefore, according to the present invention, the number of parts can be reduced and the number of parts can be reduced.Secondly, an excellent seal can be achieved. can be provided.

[Brief explanation of the drawing]

The drawings show an example of an embodiment in which a structure for rotatably supporting a ring-shaped member according to the present invention is applied to a structure for rotatably supporting an adjustment shaft in a vehicle headlamp device, and FIG. 2 is a sectional view taken along the line A-A in FIG. 1, FIG. 83 is a sectional view taken along the line B-B in FIG. 1 with some parts omitted, and FIG. FIG. 3 is an enlarged exploded perspective view of main parts. Explanation of symbols 49...Support member (swing arm), 58...Support surface, 59...Through hole, 63...
Shaft-like member (adjustment screw), 65... contact surface

Claims (1)

[Claims] The support member has an insertion hole through which the shaft member is inserted, and a concave hemispherical support surface having the insertion hole as the top, and the shaft member has a spherical contact surface having a complementary relationship with the support surface. form,
A structure for rotatably supporting a shaft-like member, characterized in that the spherical contact surface of the shaft-like member is brought into close contact with the quarter-hemispherical support surface of the support key 5 member.