Annular plate for headlamp installation and headlamp installation method

Abstract

The invention discloses an annular plate for headlamp mounting and a headlamp mounting method.The annular plate is matched with the outer surface of the peripheral portion of a headlamp in shape and thickness, and a third mounting hole and a fourth mounting hole are formed in the annular plate in the thickness direction; the diameter of the third mounting hole is larger than that of a first mounting hole in a bottom plate of the headlamp, and the fourth mounting hole is matched with a second mounting hole in the bottom plate; when the annular plate is mounted, the third mounting holes correspond to the first mounting holes in position, and the fourth mounting holes correspond to the second mounting holes in position. When the annular plate is used for installing the headlamp, the technical problem that the headlamp installation efficiency is low can be solved.

Description

Technical Field

[0001] The invention belongs to the technical field of rail vehicle headlamp installation, and in particular relates to an annular plate used for headlamp installation and a headlamp installation method. Background Art

[0002] At present, the headlights on rail vehicles are mostly fixed in the lamp compartment of the front of the vehicle by a mixed connection method of bonding and bolting. The gap between the headlight and the lamp compartment is uniform and the appearance is good. Figure 1 As shown, the headlamp is mainly composed of three parts: lamp cover, lamp panel and bottom plate. The lamp cover includes a peripheral part and a middle part located inside the peripheral part, and the middle part is generally made of light-transmitting material. The bottom plate is connected to the mounting cavity of the lamp compartment by adhesive and the second fastener, the lamp panel is mounted on the bottom plate, the lamp cover is mounted on the bottom plate by the first fastener, and the lamp cover and the bottom plate are sealed by a sealing strip. The flatness and peripheral gap between the headlamp and the outer surface of the lamp compartment are adjusted by adhesive, and they are bonded and fixed by adhesive. When installing the headlamp, in order to control the surrounding gap and the flatness with the outer surface of the lamp housing, first inject adhesive on the mounting surface of the mounting cavity of the lamp housing to bond the headlamp. After the adhesive is initially cured, remove the lamp cover, use a drill gun to drill through the adhesive layer in the first mounting hole on the base plate, install connecting bolts in the first mounting hole on the base plate and the fifth mounting hole reserved in the mounting cavity of the lamp housing to connect the base plate and the lamp housing, then trim the dry glue overflowing from the sides and bottom of the base plate, and fill in the glue-missing positions to seal. This installation method has the following five problems: 1) When bonding the headlight, it is impossible to observe the alignment of the first mounting hole on the base plate and the fifth mounting hole reserved in the mounting cavity of the lamp compartment. When installing the bolt after the glue is cured, the holes are often misaligned, and the first mounting hole on the base plate needs to be milled; 2) Due to the obstruction of the middle part of the lamp cover, it is impossible to observe the glue layer on the bonding surface of the base plate and the mounting cavity. If too little glue is injected, it is easy to cause glue shortage and bubbles, resulting in reduced bonding strength and the risk of water leakage; if too much glue is injected, the adhesive glue is easy to overflow and the lamp cover , light board and other moving parts; 3) The adhesive that overflows from the inside of the bottom plate cannot be scraped off in time, and it is necessary to wait for the adhesive to solidify before removing the lamp cover and using a utility knife to cut the overflowed adhesive, resulting in an unsightly adhesive surface and low efficiency; 4) During installation, it is impossible to use adjustment gaskets between the mounting surface of the bottom plate and the mounting cavity to adjust the flatness of the headlamp and the outer surface of the lamp compartment. When the bolts are tightened, the adhesive shrinks under pressure, causing the bottom plate to deform, and there is a risk of reduced sealing of the headlamp; 5) There is a risk of water flowing into the lamp compartment along the gaps around the mounting bolts on the bottom plate. Due to the above technical problems in the current headlamp installation method, the installation efficiency of the headlamp is low and the sealing effect is poor after installation. Summary of the invention

[0003] In order to solve the problems existing in the prior art, the present invention aims to provide an annular plate for headlamp installation and a headlamp installation method. The use of an annular plate for auxiliary installation during headlamp installation can solve the technical problem of low headlamp installation efficiency.

[0004] In order to achieve the above object, the technical method adopted by the present invention is:

[0005] A ring plate for mounting a headlamp, the structural features of which are: the outer surface shape and thickness of the ring plate and the peripheral ring portion of the headlamp are matched, a third mounting hole and a fourth mounting hole are provided on the ring plate in the thickness direction, the diameter of the third mounting hole is larger than the diameter of the first mounting hole on the bottom plate of the headlamp, and the fourth mounting hole matches the second mounting hole on the bottom plate; when the ring plate is mounted, the third mounting hole corresponds to the setting position of the first mounting hole, and the fourth mounting hole corresponds to the setting position of the second mounting hole.

[0006] The annular plate can be made of nylon or a metal material coated with a non-stick adhesive coating such as polytetrafluoroethylene or a low surface energy nano coating. The thickness and surface curvature of the annular plate are consistent with the lamp cover. A third mounting hole is provided on the annular plate corresponding to the first mounting hole of the base plate, so that the second fastener is installed from the third mounting hole of the annular plate to connect the base plate and the lamp compartment. A fourth mounting hole is provided on the annular plate corresponding to the second mounting hole of the base plate, so that the annular plate is connected to the base plate through the first fastener. When adjusting the peripheral seam and flatness of the headlamp and the lamp compartment, the annular plate is used to replace the lamp cover, so that the alignment of the first mounting hole on the base plate and the fifth mounting hole on the mounting cavity of the lamp compartment can be observed before bonding, and the first mounting hole on the base plate does not need to be milled, thereby improving the installation efficiency of the headlamp. Since the annular plate is an annular structure, the adhesive layer of the bonding surface of the base plate and the mounting cavity can be observed to avoid too much or too little glue injection, and the overflowed glue can be scraped in time, thereby improving the installation efficiency of the headlamp.

[0007] Preferably, an arc-shaped boss is provided at the bottom wall edge of the annular plate, and the arc-shaped boss extends in a direction away from the bottom wall of the annular plate, and a groove is provided between the arc-shaped boss and the outer edge of the annular plate. The arc-shaped boss is provided on the bottom wall of the annular plate, which is conducive to the discharge of gas in the cavity when the annular plate is installed on the bottom plate, and the generation of cavities and bubbles in the adhesive is reduced. The groove is provided on the outer side of the arc-shaped boss to form a certain resistance to the flow of the adhesive and slow down the fluidity of the adhesive.

[0008] Specifically, the distance between the arc-shaped boss and the fourth mounting hole is greater than the distance between the second mounting hole and the outer edge of the bottom plate. When the annular plate is mounted on the bottom plate, the arc-shaped boss and the groove are both located outside the bottom plate.

[0009] Preferably, the outer wall profile of the annular plate is 1.2 to 1.8 mm smaller than the inner wall profile of the mounting cavity of the lamp housing where the headlamp is to be mounted. When the annular plate is mounted in the mounting cavity of the lamp housing, the distance between the outer wall profile of the annular plate and the inner wall profile of the mounting cavity is less than 1.2 to 1.8 mm, so that the gap between the lamp cover and the mounting cavity is uniform and controlled within 2 mm when the lamp cover is installed.

[0010] Preferably, the annular plate is provided with a disassembly bolt, which is detachably fixedly connected to the annular plate via a thread. The disassembly bolt is provided to facilitate disassembly of the annular plate.

[0011] Based on the same inventive concept, the present application also provides a headlamp installation method, using the annular plate for headlamp installation as described above, the headlamp also includes a lamp plate; the headlamp installation method includes the following steps:

[0012] S1. Remove the lamp cover and the lamp board from the bottom plate, place the annular plate on the bottom plate and adjust the position of the annular plate so that the first mounting hole is aligned with the third mounting hole and the fourth mounting hole is aligned with the second mounting hole, respectively, and set a first fastener in the second mounting hole and the fourth mounting hole so that the annular plate is fixedly connected to the bottom plate;

[0013] S2. Place the connected annular plate and the bottom plate in the mounting cavity of the lamp housing, and adjust the position of the annular plate and the bottom plate so that the first mounting hole, the third mounting hole and the fifth mounting hole reserved in the mounting cavity are aligned, and set a second fastener in the first mounting hole and the fifth mounting hole to pre-fix the bottom plate and the lamp housing;

[0014] S3. An adjustment gasket is set between the bottom plate and the mounting surface of the mounting cavity so that the gap and flatness between the annular plate and the lamp compartment meet the requirements, and the position and number of the adjustment gasket are marked;

[0015] S4. Remove the second fastener, inject adhesive to the mounting surface of the mounting cavity, and make the outermost adhesive surface in the mounting cavity higher than the mounting surface of the bottom plate;

[0016] S5. Place the connected annular plate and the bottom plate into the mounting cavity, adjust the position, set the second fastener in the first mounting hole and the fifth mounting hole for pre-installation, and set a corresponding number of adjustment gaskets at the marked position in step S3, so that the gap and flatness between the annular plate and the outer surface of the lamp housing meet the requirements, tighten the second fastener, and scrape the overflowed adhesive from the mounting cavity to form;

[0017] S6. After the adhesive is cured, remove the annular plate and install the lamp cover and lamp board.

[0018] In the headlamp installation method of the present application, when adjusting the seam and flatness around the headlamp and the lamp compartment, an annular plate is used to replace the lamp cover, so that the alignment of the first mounting hole on the bottom plate and the fifth mounting hole on the mounting cavity of the lamp compartment can be observed before bonding, and there is no need to mill the first mounting hole on the bottom plate, thereby improving the installation efficiency of the headlamp. Since the annular plate is an annular structure, the glue layer of the bonding surface of the bottom plate and the mounting cavity can be observed to avoid the situation of too much or too little glue injection, and the overflowed glue can be scraped in time, the glue surface is more beautiful and the installation efficiency can be improved. An adjustment gasket is set on the mounting surface between the bottom plate and the mounting cavity to adjust the flatness of the outer surface of the headlamp and the lamp compartment. When the bottom plate is fastened with fasteners, the bottom plate will not be deformed, thereby improving the sealing performance of the headlamp. Before the adhesive is cured, the bottom plate and the lamp compartment are fixed by the second fastener, thereby reducing the risk of water flowing into the lamp compartment along the gap around the fastener, thereby improving the sealing performance of the headlamp.

[0019] Preferably, in step S3, the gasket used is a U-shaped gasket, and the U-shaped gasket is inserted from the second fastener installation position in the installation cavity.

[0020] Specifically, in step S5, after tightening the second fastener, adhesive is injected from inside the mounting cavity into the mounting surface gap between the bottom plate and the mounting cavity.

[0021] Specifically, in step S4, the outermost adhesive surface in the installation cavity is 2-3 mm higher than the installation surface of the base plate. Since the width of the base plate is smaller than the width of the installation cavity, after the base plate is installed, there is a gap between the base plate and the side wall of the installation cavity, which needs to be filled with adhesive.

[0022] Preferably, the annular plate is provided with a disassembly bolt, which is detachably fixedly connected to the annular plate by a thread; in step S6, the disassembly bolt is screwed so that the bottom of the disassembly bolt is pressed against the bottom plate, and a force is applied to the disassembly bolt to separate the annular plate from the bottom plate. By providing the disassembly bolt, it is easy to separate the annular plate from the bottom plate.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] 1. In the headlamp installation method of the present invention, when adjusting the peripheral seam and flatness between the headlamp and the lamp housing, an annular plate is used to replace the lamp cover, so that the alignment of the first mounting hole on the bottom plate and the fifth mounting hole on the mounting cavity of the lamp housing can be observed before bonding, and there is no need to mill the first mounting hole on the bottom plate, thereby improving the headlamp installation efficiency.

[0025] 2. The annular plate used in the headlamp installation method of the present invention is an annular structure, and the glue layer condition of the bonding surface of the bottom plate and the installation cavity can be observed to avoid the situation of too much or too little glue injection, and the overflowed glue can be scraped in time, so that the glue surface is more beautiful and the installation efficiency is improved.

[0026] 3. In the headlamp installation method of the present invention, an adjustment gasket is arranged on the installation surface between the base plate and the installation cavity to adjust the flatness of the headlamp and the outer surface of the lamp compartment. When the base plate is fastened with fasteners, the base plate will not be deformed, thereby improving the sealing performance of the headlamp.

[0027] 4. In the headlamp installation method of the present invention, the base plate and the lamp housing are fixed by the second fastener before the adhesive is cured, thereby reducing the risk of water flowing into the lamp housing along the gaps around the fasteners and improving the sealing performance of the headlamp. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 A schematic diagram of the structure of a headlamp and a lamp compartment in the prior art;

[0029] Figure 2 It is a schematic diagram of the installation structure of the annular plate in the headlamp installation method of the present invention;

[0030] Figure 3 for Figure 2 Schematic diagram of the cross-sectional structure after the middle ring plate is installed;

[0031] Figure 4 for Figure 2 Schematic diagram of the bolt removal structure on the middle ring plate.

[0032] In the figure:

[0033] 1-lamp compartment, 101-mounting cavity, 102-fifth mounting hole, 2-headlamp, 201-lamp cover, 201-1-circumferential portion, 201-2-middle portion, 202-bottom plate, 203-lamp board, 204-first mounting hole, 205-second mounting hole, 206-first fastener, 207-second fastener, 208-sixth mounting hole, 3-adjusting gasket, 4-adhesive, 5-annular plate, 6-third mounting hole, 7-fourth mounting hole, 8-arc boss, 9-groove, 10-disassembly bolt. DETAILED DESCRIPTION

[0034] The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict. For the convenience of description, if the words "upper", "lower", "left" and "right" appear in the following, they only indicate that the upper, lower, left and right directions are consistent with the drawings themselves, and do not limit the structure.

[0035] like Figure 1As shown, the headlamp 2 includes a lamp cover 201, a base plate 202 and a lamp board 203. The headlamp 2 is installed in the mounting cavity 101 of the lamp housing 1. The mounting cavity 101 is provided with a fifth mounting hole 102. The lamp cover 201 includes a peripheral portion 201-1 and a middle portion 201-2 located inside the peripheral portion 201-1. The middle portion 201-2 is made of a light-transmitting material. The peripheral portion 201-1 is provided with a sixth mounting hole 208. The base plate 202 is provided with a first mounting hole 204 corresponding to the fifth mounting hole 102 and a second mounting hole 205 corresponding to the sixth mounting hole 208. The lamp cover 201 and the base plate 202 are fixedly connected by a first fastener 206 disposed in the sixth mounting hole 208 and the second mounting hole 205. The base plate 202 and the lamp housing 1 are fixedly connected by a second fastener 207 disposed in the first mounting hole 204 and the fifth mounting hole 102. As shown Figure 2 As shown, the annular plate for headlamp installation provided in this embodiment has the same outer surface shape, size and thickness as the peripheral portion 201-1 of the lamp cover 201. Figure 3 As shown, the annular plate 5 is provided with a third mounting hole 6 corresponding to the first mounting hole 204 and a fourth mounting hole 7 corresponding to the second mounting hole 205 along the thickness direction. The diameter of the third mounting hole 6 is larger than the diameter of the first mounting hole 204, and the fourth mounting hole 7 matches the second mounting hole 205. The fourth mounting hole 7 is a countersunk hole, and the third mounting hole 6 is a through hole. Figure 4 As shown, an arc-shaped boss 8 is provided at the bottom wall edge of the annular plate 5, and the arc-shaped boss 8 extends in a direction away from the bottom wall of the annular plate 5, and a groove 9 is provided between the arc-shaped boss 8 and the outer edge of the annular plate 5. Figure 3 As shown, the distance between the arc-shaped boss 8 and the fourth mounting hole 7 is greater than the distance between the second mounting hole 205 and the outer edge of the bottom plate 202, and the outer wall profile of the annular plate 5 is 1.2-1.8 mm smaller than the inner wall profile of the mounting cavity 101. Figure 4 As shown, a disassembly bolt 10 is provided on the annular plate 5, and the disassembly bolt 10 is detachably fixedly connected to the annular plate 5 via threads.

[0036] This embodiment also provides a method for installing a headlamp, using the annular plate for installing a headlamp as described above, comprising the following steps:

[0037] S1. Remove the lamp cover 201 and the lamp board 203 from the bottom plate 202, place the annular plate 5 on the bottom plate 202 and adjust the position of the annular plate 5 so that the first mounting hole 204 is aligned with the third mounting hole 6 and the fourth mounting hole 7 is aligned with the second mounting hole 205, respectively, and set the first fastener 206 in the second mounting hole 205 and the fourth mounting hole 7 so that the annular plate 5 is fixedly connected to the bottom plate 202;

[0038] S2. Place the connected annular plate 5 and bottom plate 202 in the mounting cavity 101 of the lamp housing 1, and adjust the positions of the annular plate 5 and the bottom plate 202 so that the first mounting hole 204 and the third mounting hole 6 are aligned with the fifth mounting hole 102 reserved in the mounting cavity 101, and set the second fastener 207 in the first mounting hole 204 and the fifth mounting hole 102 to pre-fix the bottom plate 202 and the lamp housing 1;

[0039] S3. An adjustment gasket 3 is arranged between the bottom plate 202 and the mounting surface of the mounting cavity 101 so that the gap and flatness between the annular plate 5 and the lamp chamber 1 meet the requirements, and the setting position and quantity of the adjustment gasket 3 are marked; the adjustment gasket 3 is a U-shaped gasket, which is inserted from the mounting position of the second fastener 207 in the mounting cavity 101; S4. The second fastener 207 is removed, and the mounting surface between the mounting cavity 101 and the bottom plate 202 is subjected to surface treatment, shielding and other work; the adhesive 4 is injected into the mounting surface of the mounting cavity 101, and the adhesive strip is the same width as the surface to be bonded, and the outermost adhesive surface in the mounting cavity 101 is 2 to 3 mm higher than the mounting surface of the bottom plate 202;

[0040] S5. Place the connected annular plate 5 and bottom plate 202 into the mounting cavity 101, adjust the positions, set the second fastener 207 in the first mounting hole 204 and the fifth mounting hole 6 for pre-installation, and set a corresponding number of adjustment gaskets 3 at the marked positions in step S3, so that the gap and flatness between the annular plate 5 and the outer surface of the lamp housing 1 meet the requirements, tighten the second fastener 207, inject adhesive 4 into the gap between the bottom plate 202 and the mounting cavity 101 from the mounting cavity 101, and scrape the overflowed adhesive 4 from the mounting cavity 101 to form it, and remove the inner masking tape;

[0041] S6. After the adhesive 4 is cured, the disassembly bolt 10 is screwed so that the bottom of the disassembly bolt 10 is against the bottom plate 202, and a force is applied to the disassembly bolt 10 to separate the annular plate 5 from the bottom plate 202, and the lamp cover 201 and the lamp board 203 are installed.

[0042] The contents explained in the above embodiments should be understood as these embodiments are only used to more clearly illustrate the present invention, and are not used to limit the scope of the present invention. After reading the present invention, various equivalent forms of modifications to the embodiments made by those skilled in the art fall within the scope defined by the claims attached to the present invention.

Claims

1. A ring plate for headlamp installation, characterized in that: The annular plate (5) matches the outer surface shape and thickness of the peripheral portion (201-1) of the headlamp (2); a third mounting hole (6) and a fourth mounting hole (7) are provided on the annular plate (5) along the thickness direction; the diameter of the third mounting hole (6) is greater than the diameter of the first mounting hole (204) on the bottom plate (202) of the headlamp (2); and the fourth mounting hole (7) matches the second mounting hole (205) on the bottom plate (202); When the annular plate (5) is installed, the third installation hole (6) corresponds to the setting position of the first installation hole (204), and the fourth installation hole (7) corresponds to the setting position of the second installation hole (205).

2. The annular plate for headlamp installation according to claim 1, characterized in that: An arc-shaped boss (8) is provided at the bottom wall edge of the annular plate (5), and the arc-shaped boss (8) extends in a direction away from the bottom wall of the annular plate (5). A groove (9) is provided between the arc-shaped boss (8) and the outer edge of the annular plate (5).

3. The annular plate for headlamp installation according to claim 2, characterized in that: The distance between the arc-shaped boss (8) and the fourth mounting hole (7) is greater than the distance between the second mounting hole (205) and the outer edge of the bottom plate (202).

4. The annular plate for headlamp installation according to claim 1, characterized in that: The outer wall profile of the annular plate (5) is 1.2 to 1.8 mm smaller than the inner wall profile of the mounting cavity (101) of the lamp compartment (1) where the headlamp (2) is to be mounted.

5. The annular plate for headlamp installation according to claim 1, characterized in that: The annular plate (5) is provided with a disassembly bolt (10), and the disassembly bolt (10) is detachably fixedly connected to the annular plate (5) via a thread.

6. A method for installing a headlamp, characterized in that: A ring-shaped plate for mounting a headlamp as claimed in any one of claims 1 to 5 is used, wherein the headlamp (2) comprises a lamp cover (201), a bottom plate (202) and a lamp plate (203); and a method for mounting the headlamp comprises the following steps: S1. Remove the lamp cover (201) and the lamp board (203) from the base plate (202), place the annular plate (5) on the base plate (202) and adjust the position of the annular plate (5) so that the first mounting hole (204) and the third mounting hole (6) and the fourth mounting hole (7) and the second mounting hole (205) are aligned respectively, and set a first fastener (206) in the second mounting hole (205) and the fourth mounting hole (7) so that the annular plate (5) is fixedly connected to the base plate (202); S2. Place the connected annular plate (5) and the bottom plate (202) in the mounting cavity (101) of the lamp housing (1), and adjust the positions of the annular plate (5) and the bottom plate (202) so that the first mounting hole (204), the third mounting hole (6) and the fifth mounting hole (102) reserved in the mounting cavity (101) are aligned, and set a second fastener (207) in the first mounting hole (204) and the fifth mounting hole (102) to pre-fix the bottom plate (202) and the lamp housing (1); S3. An adjustment gasket (3) is arranged between the bottom plate (202) and the mounting surface of the mounting cavity (101) so that the gap and flatness between the annular plate (5) and the lamp housing (1) meet the requirements, and the setting position and quantity of the adjustment gasket (3) are marked; S4. Remove the second fastener (207), inject adhesive (4) into the mounting surface of the mounting cavity (101), and the outermost adhesive surface in the mounting cavity (101) is higher than the mounting surface of the bottom plate (202); S5. Place the connected annular plate (5) and the bottom plate (202) into the mounting cavity (101), adjust the position, set the second fastener (207) in the first mounting hole (204) and the fifth mounting hole (6) for pre-installation, and set a corresponding number of adjustment gaskets (3) at the marked positions in step S3, so that the gap and flatness between the annular plate (5) and the outer surface of the lamp housing (1) meet the requirements, tighten the second fastener (207), and scrape the overflowed adhesive (4) from the mounting cavity (101) to form; S6. After the adhesive (4) is cured, remove the annular plate (5) and install the lamp cover (201) and the lamp board (203).

7. The headlamp installation method according to claim 6, characterized in that: In step S3, the gasket (3) used is a U-shaped gasket, and the U-shaped gasket is inserted from the installation position of the second fastener (207) in the installation cavity (101).

8. The headlamp installation method according to claim 7, characterized in that: In step S5, after tightening the second fastener (207), adhesive glue (4) is injected into the installation surface gap between the bottom plate (202) and the installation cavity (101) from inside the installation cavity (101).

9. The headlamp installation method according to claim 6, characterized in that: In step S4, the outermost rubber surface in the mounting cavity (101) is 2 to 3 mm higher than the mounting surface of the bottom plate (202).

10. The headlamp installation method according to claim 6, characterized in that: The annular plate (5) is provided with a disassembly bolt (10), and the disassembly bolt (10) is detachably fixedly connected to the annular plate (5) via a thread; in step S6, the disassembly bolt (10) is screwed so that the bottom of the disassembly bolt (10) is pressed against the bottom plate (202), and a force is applied to the disassembly bolt (10) so that the annular plate (5) and the bottom plate (202) are separated.

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