Headlamp body structure suitable for low-floor light rail vehicle

Abstract

The utility model provides a headlamp body structure suitable for a low-floor light rail vehicle, which comprises a lamp body, the lamp body is formed by die-casting aluminum alloy, the designed wall thickness is 4mm, an embedded thread sleeve is not used in the forming process, but a self-tapping thread sleeve mode is adopted, the mode can avoid part defects caused by long die-casting time and uneven temperature in the forming process, and the product quality is improved. Compared with a lamp body made of a PC material, the service life of the PC material is only 1-2 years in a high-temperature and high-humidity environment, the service life of the aluminum alloy die-casting formed lamp body is 16 years or even longer, and only the lampshade and the internal modules need to be replaced when the aluminum alloy die-casting formed lamp body is erected and repaired for 8 years, and the lamp body does not need to be replaced; the lamp body is installed on the front face, the mode that the whole lamp is installed on the back face and overhauled on the front face is changed into the mode that the whole lamp is installed on the front face and overhauled on the front face, the overhaul and maintenance time is shortened to be within one hour from eight hours, the overhaul time is saved by more than seven hours, later overhaul and maintenance are facilitated, and cost is saved.

Description

Technical Field

[0001] The utility model relates to the field of rail vehicle bodies, in particular to a headlamp body structure suitable for low-floor light rail vehicles. Background Art

[0002] In the past, the headlight bodies of low-floor light rail vehicles were made of PC, a notch-sensitive material. If a small crack in PC is not terminated in time, it will expand into a large crack. Under the stimulation of heat, oxygen, shear, and especially water and alkaline groups, the PC material is prone to chain scission reaction - degradation (material modification), which causes "internal damage" to the PC and reduces the impact resistance and heat resistance of the injection molded parts. In order to install the embedded nuts designed, the nuts need to be placed in the mold cavity in advance, which increases the injection molding residence time and significantly prolongs the product's injection molding cycle. The material stays in the barrel for at least 3 minutes (barrel temperature is 280-320℃), increasing the risk of material degradation. In actual use, problems such as lamp body cracks and insert shedding have successively occurred.

[0003] At the same time, the entire lamp is installed on the back and fastened under the driver's platform on the inside of the hood. After the driver's platform is installed, it blocks the lamp installation point. Once the lamp body fails, the lamp body needs to be replaced, and the part of the driver's platform that blocks the lamp installation point needs to be removed. Maintenance is extremely inconvenient and labor-intensive. Judging from the current application situation, the existing lamp body material and structure cannot meet the 16-year service life requirement.

[0004] Previous low-floor light rail vehicle headlights had a short service life, low lamp intensity, and unreasonable shape and angle design, resulting in the two lamps being out of focus and insufficient illumination during driving, and high maintenance costs. Utility Model Content

[0005] The purpose of this utility model is to redesign the shape, size and angle of the lamp body to solve the problems of short lamp life, low lamp strength, lack of focus and insufficient illumination during use, inconvenient maintenance, etc. in actual use, meet the requirement of 16 years of lamp life, and reduce maintenance costs.

[0006] To achieve the above-mentioned object, the utility model provides a headlamp body structure suitable for low-floor light rail vehicles, including a lamp body. The lamp body has an outer curve radius that gradually transitions from 950mm to 3660mm using a spline curve. The lamp body material is replaced by an aluminum alloy material instead of the original PC material. The lamp body is mounted from the front as a whole. The lamp body is provided with an inner mounting hole, an outer mounting hole and a bottom wire hole. The lamp body is mounted on the front cover plate of the vehicle body by means of bolts passing through the inner mounting hole and the outer mounting hole. At least one bottom wire hole is provided on the back of the lamp body for passing the cable.

[0007] Furthermore, the lamp body is mounted on the front cover of the vehicle body by using M10 bolts through the inner mounting hole Φ10 and M6 bolts through the outer mounting hole Φ6, and a bottom wire hole Φ20 is opened on the back for the cable to pass through.

[0008] Furthermore, the lamp body is formed by die-casting of aluminum alloy with a designed wall thickness of 4 mm. In the forming process, self-tapping screw sleeves are used instead of inlaid screw sleeves.

[0009] The lamp body of the present invention is formed by die-casting of aluminum alloy with a designed wall thickness of 4mm. In the molding process, inlaid screw sleeves are no longer used, but self-tapping screw sleeves are adopted. This method can avoid long die-casting time during molding and part defects caused by uneven temperature. Compared with the lamp body made of PC material, the life of PC material is only 1-2 years in a high temperature and high humidity environment. The aluminum alloy die-casting lamp body adopted in the present invention can meet the service life of 16 years or even longer. When it is repaired in 8 years, only the lampshade and internal module need to be replaced, and the lamp body does not need to be replaced. The lamp body adopts the front installation method, and the whole lamp is installed on the back and the front maintenance method is changed to the front installation and front maintenance method, which reduces the maintenance time from 8 hours to less than 1 hour, saving more than 7 hours of maintenance time, facilitating later maintenance and saving costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 Lamp body installation drawing;

[0011] Figure 2 for Figure 1 Schematic diagram of the lamp body in the middle A direction;

[0012] Figure 3 This is the axonometric diagram of the lamp body;

[0013] Figure 4 This is a top view of the lamp body;

[0014] Figure 5 This is the side view of the lamp body.

[0015] Lamp body, 2. Inner mounting hole, 3. Outer mounting hole, 4. Bottom wire hole. DETAILED DESCRIPTION

[0016] Reference Figures 1 to 5The utility model optimizes the shape of the lamp body 1. The curve radius of the entire lamp body 1 gradually transitions from 950mm to 3660mm using a spline curve. Through simulation and sample testing, the lighting angle of the lamp is optimized to meet the illumination requirements during driving. The lamp body is optimized to be made of aluminum alloy and is cast to improve product durability. The lamp body 1 is installed from the front and inspected from the front. An M10 bolt is used through the inner mounting hole 2 with a diameter of Φ10 and an M6 bolt is used through the outer mounting hole 3 with a diameter of Φ6 to be installed on the cover plate at the front end of the vehicle body. Only one bottom wire hole 4 with a diameter of Φ20 is opened on the back for cable passage, which is convenient for later inspection and maintenance and effectively reduces the cost of repair and maintenance. According to the number of cables required, it is not limited to one bottom wire hole 4.

[0017] The lamp body 1 of the present invention is formed by die-casting of aluminum alloy, with a designed wall thickness of 4mm. In the molding process, inlaid screw sleeves are no longer used, but self-tapping screw sleeves are adopted. This method can avoid long die-casting time and part defects caused by uneven temperature during molding. Compared with the lamp body made of PC material, the life of PC material is only 1-2 years in a high temperature and high humidity environment. The aluminum alloy die-casting lamp body 1 adopted in the present invention can meet the service life of 16 years or even longer. When the frame is repaired every 8 years, only the lampshade and internal module need to be replaced, and the lamp body 1 does not need to be replaced.

[0018] The lamp body 1 adopts the front installation method, changing the whole lamp back installation and front maintenance method to the whole lamp front installation and front maintenance method, reducing the maintenance time from 8 hours to less than 1 hour, saving more than 7 hours of maintenance time, facilitating later maintenance and saving costs.

Claims

1. A headlamp body structure suitable for low-floor light rail vehicles, comprising a lamp body, characterized in that: The radius of the lamp body curve gradually transitions from 950mm to 3660mm in the form of a spline curve. The lamp body is made of aluminum alloy. The entire lamp body is installed from the front. The lamp body is provided with an inner mounting hole, an outer mounting hole and a bottom wire hole. The lamp body is installed on the front cover of the vehicle body through the inner mounting hole and the outer mounting hole. At least one bottom wire hole is opened on the back of the lamp body for the cable to pass through.

2. The headlamp body structure suitable for low-floor light rail vehicles according to claim 1, characterized in that: The lamp body is mounted on the front cover of the vehicle body by using M10 bolts through the inner mounting hole Φ10 and M6 bolts through the outer mounting hole Φ6. A bottom wire hole Φ20 is opened on the back for the cable to pass through.

3. The headlamp body structure suitable for low-floor light rail vehicles according to claim 1, characterized in that: The lamp body is formed by die-casting of aluminum alloy with a designed wall thickness of 4mm. During the forming process, self-tapping screw sleeves are used instead of inlaid screw sleeves.

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