JPH041002Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a structure for mounting and supporting a headlamp on a vehicle body such as an automobile.

[Prior art] When attaching a headlamp to a vehicle body,
It is desirable to have a structure that allows the optical axis to be adjusted vertically and horizontally.

In the past, it was not easy to adjust the direction of the optical axis (for example, the mounting part had to be adjusted with shims), and while it was not easy to adjust the horizontal direction, it was possible to adjust the vertical direction using screws. There were also structures that could be easily adjusted.

Therefore, a conventional example of a structure in which the direction of the optical axis can be easily adjusted both vertically and horizontally supports the rear part of the lamp housing with a ball joint, and also includes a vertical adjustment screw and a horizontal adjustment screw for the optical axis. It has a similar structure.

Recently, flat headlamps have come into use in consideration of matching with the aesthetic design of the car body.

Since this flat headlamp has a relatively deep depth, a structure in which the rear part of the lamp housing is supported by a ball joint will not only make the holding state unstable, making optical axis adjustment uncertain, but also tends to cause resonance. There is a problem. In order to eliminate these problems, (a) a vertical support shaft fixed to the vehicle body, (b) a headlamp retainer plate rotatably supported by the vertical shaft, and (c) both ends of the retainer plate. (d) a pair of concentric and horizontal lamp housing support shafts attached to each of the two parallel surfaces, and (e) a pair of lamp housing support shafts attached to both the left and right sides of the lamp housing. A bearing member that is fixed and fits with the above-mentioned support shaft, (f) a screw-feed type optical axis left/right adjustment means interposedly connected between the vehicle body and the above-mentioned holding plate, and (f) a lamp housing and a holding member. a screw-feed type optical axis vertical adjustment means interposedly connected to the plate;
(H) A configuration may be considered in which a means for applying frictional resistance to the rotation of the holding plate around the vertical axis is provided. This configuration is currently being applied for separately by the applicant (hereinafter referred to as a draft plan)
It is.

According to the above draft plan, the vicinity of the center of gravity of the headlamp can be supported by the vertical and horizontal axes, and
By adjusting the screw feed around the vertical axis and the horizontal axis, it is possible to easily and accurately adjust the optical axis.

5 to 7 show an example of the above-mentioned draft, in which FIG. 5 is a vertical sectional view, FIG. 6 is a horizontal sectional view, and FIG. 7 is a front view.

1 is a flat lamp housing, and 2 is a front lens.

In this example, a concave reflective surface is provided on the inner surface of the lamp housing 1 to constitute the reflector 3.

A light source bulb 4 is provided near the focal point of the reflector 3.

Z-Z is an optical axis, XX is a horizontal axis passing through the focal point and perpendicular to the optical axis, and Y-Y is a vertical axis passing through the focal point and perpendicular to both axes.

A vertical shaft 7 is supported by a bracket 6 installed on the vehicle body 5, and a holding plate 8 for holding the lamp housing is supported horizontally by the vertical shaft 7.

The above-mentioned holding plate 8 is arranged in the light projection direction (Z-Z axis direction)
As seen in the front view (Fig. 7), the left and right ends are folded up vertically, and as seen in the front view (Fig. 7), the parallel two-sided parts 8a,
8b is formed. As a result, the holding plate 8 of this example
In a front view, it has a U-shape that is concave toward the top.

Horizontal shafts 9a and 9b are attached to the pair of parallel two-sided portions 8a and 8b, respectively. Both horizontal axes 9a, 9b are arranged concentrically as shown in FIGS. 6 and 7.

(See Figure 6) On the left and right sides of the lamp housing 1 (left and right sides with respect to the Z axis, however, this refers to the posture in use), horizontal axes 9a,
Bearing part 1 is provided with a projection having a hole that fits into bearing part 9b.
a and 1b are configured.

In this example, the horizontal shafts 9a, 9b are constructed with bolts, and the holes of the bearing portions 1a, 1b are constructed with screw holes. In short, when implementing the present invention, the lamp housing 1 may be rotatably supported by two parallel surfaces of a holding plate via a horizontal axis.

A screw feed adjustment means 10 is provided so that the holding plate 8 can be rotated back and forth about the vertical axis 7.

The screw feed adjustment means 10 of this example includes a nut member 10a fixed to the holding plate 8, a feed screw 10b screwed to the nut member 10a, a bevel gear chamber 10c fixed to the vehicle body, and a shaft on the driving side. 10d. According to this embodiment, it is easy to adjust the headlamp from above.

(See FIG. 5) A screw-type adjusting means 11 is provided between the lamp housing 1 and the holding plate 8 so that the lamp housing 1 can be rotated around a horizontal axis.

Furthermore, a braking means 40 is provided to provide frictional resistance to the rotation of the holding plate 8 about the vertical axis 7.

As explained above, it has been confirmed that when this proposal is applied, the optical axis of the headlamp can be adjusted quickly and accurately vertically and horizontally, and there is no risk of resonance occurring.

[Problems to be solved by the invention] The conventional technology is applied to the structure of the shaft support portion of the vertical and horizontal shafts, so that rotation can be made as smoothly as possible and support can be ensured. The bolt-and-nut type shown in Fig. 8 and the 9th
The caulking type shown in the figure can be considered.

In both of the above types (FIGS. 8 and 9), the bearing hole 21a provided in the supporting member 21 and the supported member 22
The bearing hole 22a provided in
A bush 23 is fitted into the bearing hole 22a. In the example of FIG. 8, the bush 23
A support shaft 24 having a flange-shaped head 24a is inserted into the bearing hole 21a and tightened with a nut 26 via a spring washer 25. In the example shown in FIG. 9, the support shaft 24' is inserted and the tip end is caulked. In this way, the supporting member 21 and the supported member 22 are prevented from sliding in the direction of separation, and a clearance C is provided.

If the above-mentioned clearance C is provided, play will occur in the thrust direction of the support shaft, making the support state of the headlamp unstable. However, if the above-mentioned clearance C is eliminated, the rotation becomes relatively unsmooth, and precise optical axis adjustment becomes impossible.

In view of the above-mentioned circumstances, the present invention has been developed to accommodate the horizontal and vertical axes without impairing the advantages of the above-mentioned proposal (the ability to adjust the optical axis by rotatably supporting the center of gravity in two orthogonal axes directions). To provide a support structure for a headlamp that prevents rattling in the vicinity and does not hinder smooth rotation.

[Means for Solving the Problems] In order to achieve the above-mentioned object, the support structure of the present invention covers the front opening of a horizontally flat lamp housing and attaches the lens, and the lens is mounted inside the flat lamp housing. Provides a concave reflector,
In addition, in a structure in which a headlamp including a light source bulb installed near the focal point of the reflector is supported on the vehicle body, (a) a vertical support shaft fixed to the vehicle body, and (b) rotation by the vertical shaft. A headlamp holding plate that is movably supported, (c) two parallel planes formed by vertically folding up both ends of the holding plate, and (d) a pair of concentric plates attached to each of the two parallel planes. and horizontal lamp housing support shaft, (E)
(f) a screw-feed type optical axis left and right adjustment means interposed and connected between the vehicle body and the holding plate; (t) A screw-feed type optical axis vertical adjustment means interposed and connected between the lamp housing and the holding plate, and (h) means for applying frictional resistance to rotation of the holding plate about the vertical axis. This invention is applied to the support structure of a headlamp, and is provided with a next-generation bearing mechanism on at least one of the vertical support shaft and the horizontal support shaft.

(a) The supporting member and the supported member that rotate relative to each other via the supporting shaft each have a bearing hole so as to be concentric in the assembled state, and (b) the supporting shaft penetrates through both of the bearing holes. (c) providing a clearance between the supporting member and the supported member, and providing a locking means for restricting the sliding movement of both members in the direction of separation; (d) providing clearance between the supporting member and the supported member; A screw hole is provided in at least one of the members, and a push bolt is screwed into the hole, and the tip of the push bolt is made to face the other member to prevent the supporting member and the supported member from sliding in the approaching direction. Restrict.

[Operation] According to the above structure, a clearance in the thrust direction is provided at the pivot point between the supporting member and the supported member, and when the screwing degree of the push bolt is adjusted, the clearance is narrowed and reduced. By making this adjustment appropriately, harmful backlash can be prevented without interfering with smooth rotation.

[Embodiment] FIG. 1 shows a first embodiment of the present invention. This embodiment is an example in which the present invention is applied to improve the conventional example shown in FIG. 9, and the same drawing reference numbers as in FIG. It is a constituent part.

In this example, a screw hole 21b is provided in the supporting member 21, a push bolt 27 is screwed into the screw hole 21b, and the tip thereof faces and abuts the supported member 22. 28 is a locking nut.

Figure 2 shows the push bolt 27 and locking nut 2.
FIG. 8 is an exploded perspective view of No. 8. Push bolt 27 in this example
In this example, a hexagonal head 27a is provided at one end of a threaded rod 27b, and a spherical portion 27c is formed at the other end.

FIG. 3 shows an embodiment different from the above. In this example, an annular washer member 29 is interposed between the push bolt 27' and the supported member 22. FIG. 4 is an exploded perspective view of the push bolt 27' and the annular washer member 29.

The push bolt 27 of this example has a stepped small-diameter cylindrical portion 27d formed at its tip. The annular washer member 29 is provided with an engagement hole 29a that fits into the stepped cylindrical portion 27d.

[Effect of the invention] As explained above, when this invention is applied,
The optical axis of the headlamp can be precisely adjusted, and rattling in the thrust direction can be prevented without interfering with the smooth rotation of the support part on the horizontal and vertical axes.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of essential parts showing one embodiment of the present invention;
FIG. 2 is also a partially exploded perspective view. FIG. 3 is a sectional view of a main part of an embodiment different from the above, and FIG. 4 is a partially exploded perspective view of the same. 5 to 9 show a headlamp support structure according to a trial design, in which FIG. 5 is an overall vertical sectional view of the headlamp, FIG. 6 is a horizontal sectional view, and FIG. 7 is a front view. FIGS. 8 and 9 are sectional views of one example of the vicinity of the support shaft, respectively. 1...Lamp housing, 2...Front lens,
3... Reflector, 4... Light source bulb, 5... Vehicle body, 6... Bracket, 7... Vertical shaft, 8... Holding plate of lamp housing, 8a, 8b... Parallel 2
Surface portion, 9a, 9b...Horizontal axis, 10, 11...Screw feed type adjustment device, 21...Support member, 21a
... Bearing hole, 21b ... Screw hole, 22 ... Supported member, 22a ... Bearing hole, 23 ... Bush, 2
4, 24'...Support shaft, 27, 27'...Push bolt, 27a...Hexagonal head, 27b...Screw rod, 2
7c... Spherical portion, 27d... Stepped small diameter cylindrical portion, 28... Locking nut, 29... Annular washer member, 29a... Engaging hole.

Claims (1)

[Claims for Utility Model Registration] A lens is attached to cover the front opening of a horizontally flat lamp housing, a concave reflector is provided inside the flat lamp housing, and a light source bulb is provided near the focal point of the reflector. In a structure for supporting an installed headlamp on a vehicle body, (a) a vertical support shaft fixed to the vehicle body; (b) a headlamp holding plate rotatably supported by the vertical shaft; (c) two parallel surfaces formed by vertically folding up both ends of the holding plate; (d) a pair of concentric and horizontal lamp housing support shafts attached to each of the two parallel surfaces; ) a bearing member fixed to both the left and right sides of the lamp housing and fitted with the above-mentioned support shaft; , (T) a screw-feed type optical axis vertical adjustment means interposedly connected between the lamp housing and the holding plate, and (H) means for applying frictional resistance to rotation of the holding plate about the vertical axis. 1. A headlamp support structure characterized in that at least one of the vertical support shaft and the horizontal support shaft has a bearing mechanism as described below. (a) The supporting member and the supported member that rotate relative to each other via the supporting shaft each have a bearing hole so as to be concentric in the assembled state, and (b) the supporting shaft penetrates through both of the bearing holes. (c) providing a clearance between the supporting member and the supported member, and providing a locking means for restricting the sliding movement of both members in the direction of separation; (d) providing clearance between the supporting member and the supported member; A screw hole is provided in at least one of the members, and a push bolt is screwed into the hole, and the tip of the push bolt is made to face the other member to prevent the supporting member and the supported member from sliding in the approaching direction. Restrict.