Rail transit vehicle headlamp auxiliary positioning tool and mounting method

Abstract

The invention discloses an auxiliary positioning tool for a headlamp of a rail transit vehicle and an installation method, solves the problem that the installation efficiency of the headlamp is low in the prior art, and has the beneficial effects that the headlamp does not need to be carried repeatedly, and the installation efficiency of the headlamp is improved. Comprising a main frame assembly, the main frame assembly is in a frame shape and has the same radian as a headlamp mounting base, a headlamp can be clamped in the hollow position of the main frame assembly, the shape of the main frame assembly is consistent with the shape of a headlamp shell, the outer side face of the main frame assembly is matched with the headlamp mounting base, and the main frame assembly is provided with a first opening. The fastener penetrates through the headlamp shell and is connected with the first opening; positioning assemblies are arranged on the two opposite sides, away from the outer side face of the headlamp mounting base, of the main frame assembly correspondingly, the positioning assemblies are higher than the headlamp mounting base, and the positioning assemblies are detachably connected with the main frame assembly.

Description

Technical Field

[0001] The invention relates to the field of rail transit, and in particular to a rail transit vehicle headlamp auxiliary positioning tool and an installation method. Background Art

[0002] The statements in this section merely provide background information related to the present invention and do not necessarily constitute prior art.

[0003] In the field of rail transit, headlights are the "eyes" of rail transit vehicles, and the installation of headlights is of utmost importance in the assembly of rail transit vehicles. The inventors found that there are several problems in the installation process of headlights:

[0004] 1) During the headlamp installation process, the headlamp is directly installed on the headlamp mounting seat, and the strength of the headlamp cannot be guaranteed;

[0005] 2) Currently, the installation of headlamps is mainly done manually by moving them. Because there is a gap between the headlamps and the mounting position, it needs to be repeatedly processed. The thickness of the adjustment pads pasted under the headlamp housing cannot be guaranteed because it cannot be observed. The mounting frame cannot be guaranteed to be flat after installation, resulting in a lot of rework and low efficiency.

[0006] 3) The headlamp housing itself is relatively heavy, and repeated assembly and transportation are troublesome, consuming manpower and material resources, and significantly increasing the workload; and repeated transportation is easy to damage the paint of the vehicle body; manual repeated assembly and disassembly of the headlamp is easy to damage the original headlamp, and the headlamp is prone to leakage and seepage during the rain test;

[0007] 4) After the headlights are installed, there is the problem that the mask is not flush with the surrounding surface of the vehicle body and the gaps are uneven.

[0008] 5) Some headlamp housings do not match the vehicle body, and are easily misaligned with the vehicle body during drilling and tapping. This requires the headlamp to be repeatedly lifted to drill the eyelets, which results in low work efficiency and inability to achieve accurate positioning. Summary of the invention

[0009] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a rail transit vehicle headlamp auxiliary positioning tool, which greatly facilitates the rapid installation of the headlamp without the need for repeated grinding and installation.

[0010] In order to achieve the above object, the present invention is implemented through the following technical solutions:

[0011] A rail transit vehicle headlamp auxiliary positioning tool comprises a main frame assembly, the main frame assembly is frame-shaped, the main frame assembly has the same curvature as a headlamp mounting seat, the headlamp can be clamped in the hollow of the main frame assembly, the shape of the main frame assembly is consistent with the shape of the headlamp housing, the outer side of the main frame assembly is adapted to the headlamp mounting seat, the main frame assembly is provided with a first opening, and a fastener passes through the headlamp housing and is connected to the first opening;

[0012] Positioning components are respectively arranged on two opposite sides of the main frame component away from the outer side of the headlamp mounting seat, the height of the positioning components is higher than the headlamp mounting seat, and the positioning components are detachably connected to the main frame component;

[0013] A sealing pad is arranged on the outer peripheral surface of the main frame assembly, and an adjustment pad can be arranged between the lower side surface of the main frame assembly and the headlamp mounting seat.

[0014] In the auxiliary positioning tool for headlights of rail transit vehicles as described above, the positioning component is an L-shaped positioning plate, and the L-shaped positioning plates on both sides of the main frame component are arranged relatively to each other. The L-shaped positioning plate is convenient for workers to hold, which is conducive to positioning at the headlight mounting seat and also convenient for workers to remove the L-shaped positioning plate.

[0015] In the auxiliary positioning tool for headlights of rail transit vehicles as described above, one side of the L-shaped positioning plate is connected to the main frame assembly, and the distance between the bending parts of the L-shaped positioning plates on both sides is greater than the length of the main frame assembly, which effectively ensures the positioning of the L-shaped positioning plate in the lateral direction of the rail transit vehicle body.

[0016] In the rail transit vehicle headlight auxiliary positioning tool as described above, the main frame assembly includes a first frame body and a second frame body, the first frame body is connected to the second frame body, and the sealing gasket is arranged between the outer peripheral surfaces of the first frame body and the second frame body.

[0017] In the auxiliary positioning tool for headlights of rail transit vehicles as described above, the first frame and the second frame are connected by connecting rods, and the connecting rods are located at the four corners of the first frame and the second frame. The connecting rods ensure the connection between the first frame and the second frame, and also support the sealing gasket. Of course, the first frame and the second frame are also connected at the first opening to facilitate the setting of fasteners.

[0018] In the above-mentioned auxiliary positioning tool for the headlight of a rail transit vehicle, the inner side of the adjustment pad exceeds the second frame, the inner side of the second frame is provided with a protruding edge, the interval between two adjacent protruding edges is set, and a space is provided between the protruding edges. Combined with the structure of the main frame assembly, the number of adjustment pads that need to be added between the main frame assembly and the headlight mounting seat can be seen without repeated disassembly and assembly, which greatly saves the time for disassembling and assembling the headlight.

[0019] In the above-mentioned auxiliary positioning tool for headlights of rail transit vehicles, the adjustment pad is placed on the lower side of the main frame assembly to facilitate observation of the adjustment pad by the staff;

[0020] The adjustment pads can be arranged in sections on the lower side of the main frame assembly;

[0021] Along the height direction of the main frame assembly, the number of adjustment pads is greater than or equal to 1, and the number of adjustment pads is increased or decreased by the staff according to the specific situation.

[0022] In the rail transit vehicle headlight auxiliary positioning tool as described above, the main frame assembly is further provided with second openings on both sides of the first opening, through which a hole can be drilled into the headlight mounting seat, and the diameter of the second opening is smaller than the diameter of the first opening, and the second opening is an eyelet.

[0023] The rail transit vehicle headlamp auxiliary positioning tool as described above also includes a positioning pin, which can be inserted into the second opening and the headlamp mounting seat drilled hole to position the main frame assembly.

[0024] In a second aspect, the present invention further provides a method for installing a rail transit vehicle headlamp, using the rail transit vehicle headlamp auxiliary positioning tool, comprising the following contents:

[0025] Process the main frame assembly and the positioning assembly according to the headlamp, and fix the positioning assembly on both sides of the main frame assembly;

[0026] Adhere a sealing gasket to the outer peripheral surface of the main frame assembly;

[0027] The headlight mounting base is oil-sprayed;

[0028] The staff holds the positioning assembly and inserts the main frame assembly into the headlamp mounting seat, so that the surface of the main frame assembly is flush with the surrounding surface of the rail transit vehicle body headlamp mounting seat;

[0029] Adjust the number of adjustment pads between the main frame assembly and the headlamp mounting base so that the upper side of the main frame assembly fits the headlamp mounting base;

[0030] Tighten the main frame assembly and the headlamp mounting base, and remove the positioning assembly;

[0031] Spray sealant around the outer perimeter of the main frame assembly;

[0032] The headlamp is arranged through the main frame assembly, and the headlamp housing is connected to the main frame assembly.

[0033] The beneficial effects of the present invention are as follows:

[0034] 1) In the present invention, the main frame assembly is arranged between the headlamp mounting seat and the headlamp, which can effectively ensure the strength and avoid deformation problems caused during the installation and use of the headlamp; the main frame assembly can be installed first, because the main frame assembly is hollow, which facilitates the adjustment of the number of adjustment pads between the main frame assembly and the headlamp mounting seat, and the fit between the upper side of the headlamp and the headlamp mounting seat can be ensured without repeatedly moving the headlamp, thereby reducing rework and improving the installation efficiency of the headlamp.

[0035] 2) The auxiliary tooling structure in the present invention is reasonably arranged, a sealing gasket is arranged on the outer circumference of the main frame assembly, and an adjustment gasket can be arranged between the main frame assembly and the headlamp mounting seat, so that the gap between the headlamp and the headlamp mounting seat is uniform. In this way, the main frame assembly is installed first, and the sealing of the main frame assembly and the headlamp mounting seat is ensured before the headlamp is installed. There is no need to repeatedly move the headlamp, which reduces the amount of manual labor and avoids excessive damage to the vehicle body paint. In addition, damage to the headlamp itself is effectively avoided.

[0036] 3) In the present invention, positioning components are arranged on both sides of the main frame component, and the height of the positioning components is higher than the headlamp mounting seat, so that the staff can hold the positioning components to install the main frame component into the headlamp mounting seat. Due to the limitation of the positioning components, the main frame assembly can be flush with the surface of the rail transit vehicle body around the headlamp mounting seat.

[0037] 4) In the present invention, the main frame assembly is provided with a first opening and a second opening, the first opening is used for connecting the main frame assembly with the headlamp mounting seat, and a hole can be drilled into the headlamp mounting seat through the second opening. The main frame assembly and the headlamp mounting seat can be quickly and accurately positioned through the second opening, and the headlamp installation in the later stage only needs to be fixed in place, without the need to repeatedly lift the headlamp for drilling. At the same time, it also solves the problem of misalignment of the positioning drilling holes using the headlamp housing itself in the prior art, and effectively avoids scratches on the headlamp and damage to the fiberglass paint around the vehicle body.

[0038] 5) The headlamp installation method provided in the present invention can effectively ensure that the main frame assembly is flush with the rail transit vehicle body around the headlamp mounting seat, and the headlamp mounting seat is sprayed with oil to avoid scratches on the paint on the vehicle body surface; through the setting of sealing pads and adjustment pads, the fit between the upper side of the headlamp and the headlamp mounting seat is ensured, and the setting of sealant can effectively avoid water leakage and water seepage during the rain test, avoid removing the sealant after leakage, and do not need to repeatedly apply sealant, which is conducive to reducing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] The accompanying drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0040] Figure 1 It is a schematic diagram of a rail transit vehicle headlight auxiliary positioning tool according to one or more embodiments of the present invention.

[0041] Figure 2 It is a schematic diagram of a main frame assembly in a rail transit vehicle headlight auxiliary positioning tool according to one or more embodiments of the present invention.

[0042] Figure 3 The present invention is a side view of a main frame assembly in a rail transit vehicle headlight auxiliary positioning tool according to one or more embodiments of the present invention.

[0043] Figure 4 It is a schematic diagram of a headlamp housing in a rail transit vehicle headlamp auxiliary positioning tool according to one or more embodiments of the present invention.

[0044] In the figure: the distances or sizes between parts are exaggerated to show the positions of various parts, and the schematic diagram is for reference only.

[0045] Wherein: 1. Positioning component, 1-1. Fourth opening,

[0046] 2. Main frame assembly, 2-1. First opening, 2-2. Second opening, 2-3. Flange, 2-4. First frame, 2-5. Second frame,

[0047] 3. Headlamp housing, 3-1. Third opening,

[0048] 4. Sealing gasket, 5. Adjusting gasket. DETAILED DESCRIPTION

[0049] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0050] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present invention. As used herein, unless otherwise explicitly stated in the present invention, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "include" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof;

[0051] As introduced in the background technology, the prior art has the problem of low efficiency in installing headlamps. In order to solve the above technical problem, the present invention proposes an auxiliary positioning tool for headlamps of rail transit vehicles.

[0052] Embodiment 1

[0053] In a typical embodiment of the present invention, reference is made to Figure 1 As shown, a rail transit vehicle headlamp auxiliary positioning tool includes a main frame assembly 2, the main frame assembly 2 is frame-shaped, the main frame assembly 2 has the same curvature as the headlamp mounting seat (referring to the rail transit vehicle body headlamp mounting position), the headlamp can be clamped in the hollow part of the main frame assembly 2, the shape of the main frame assembly 2 is consistent with the shape of the headlamp housing 3, the outer side surface of the main frame assembly 2 is adapted to the headlamp mounting seat, the main frame assembly is provided with a first opening, and the fastener passes through the headlamp housing and is connected to the first opening;

[0054] Positioning components 1 are respectively arranged on opposite sides of the main frame component 2 away from the outer side of the headlamp mounting seat. The height of the positioning component 1 is higher than that of the headlamp mounting seat 2, so that the positioning component 1 can protrude from the headlamp mounting seat. The positioning component 1 is detachably connected to the main frame component 2, which facilitates the removal of the positioning component after the main frame component is connected to the headlamp mounting seat.

[0055] A sealing gasket 4 is arranged on the outer peripheral surface of the main frame assembly, and the arrangement of the sealing gasket 4 is conducive to ensuring the sealing between the main frame assembly and the headlamp mounting seat; as for the sealing gasket, a rubber sealing gasket can be specifically adopted.

[0056] It is easy to understand that the fastener may specifically be a fastening bolt, and the first opening is a threaded hole.

[0057] It can be understood that the main frame assembly 2 has the same curvature as the headlamp mounting seat. In this way, through the setting of the main frame assembly, it can be ensured that the surface of the headlamp mask is flush with the surrounding surface of the headlamp mounting seat of the rail transit vehicle body. When the headlamp is being ground and matched, it can be ensured that the headlamp is flush with the vehicle body.

[0058] Specifically, the positioning assembly 1 is an L-shaped positioning plate, one side of the L-shaped positioning plate is connected to the main frame assembly, specifically by bolts, and the other sides of the L-shaped positioning plates on both sides are relatively arranged. The L-shaped positioning plate is convenient for staff to hold, which is conducive to positioning at the headlight mounting seat and also convenient for staff to remove the L-shaped positioning plate.

[0059] In addition, one side of the L-shaped positioning plate is connected to the main frame assembly, and the distance between the bending parts of the L-shaped positioning plates on both sides is greater than the length of the main frame assembly, which effectively ensures the positioning of the L-shaped positioning plate in the lateral direction of the rail transit vehicle body. The L-shaped positioning plate is provided with a fourth opening 1-1, and the fourth opening is a threaded hole. The fastening bolt can pass through the first opening and be connected to the first opening of the vertical section of the main frame assembly. After the main frame assembly is fixed by the positioning pin, the L-shaped positioning plate is removed relative to the main frame assembly.

[0060] For the main frame components, refer to Figure 3As shown, the main frame assembly 2 includes a first frame body 2-4 and a second frame body 2-5. When the auxiliary tooling is in use, the first frame body 2-4 is outside and the second frame body 2-5 is inside. Positioning assemblies are respectively arranged on both sides of the first frame body. The first frame body is connected to the second frame body. A sealing gasket is arranged between the outer peripheral surfaces of the first frame body and the second frame body. The thickness of the sealing gasket can be 1 mm.

[0061] Specifically, the first frame body and the second frame body are both quadrilaterals, the upper sides and lower sides of the first frame body and the second frame body are both arc segments, and the other two sides of the first frame body and the second frame body are both vertical segments.

[0062] refer to Figure 3 As shown, a flange 2-3 is provided on the inner side surface of the second frame 2-5 (the side surface away from the first frame), and the flange is provided in a circle around the second frame, but the flange is not a complete circle, and a distance is set between two adjacent flanges, and a space is provided between the flanges. By raising the upper side surface of the main frame assembly, the upper side surface of the main frame assembly can be fitted with the headlamp mounting seat, and the space between the lower side surface of the main frame assembly and the headlamp mounting seat can be used through the hollow part of the main frame assembly, the space between adjacent flanges, and the space between the lower side surface of the main frame assembly and the headlamp mounting seat. In this way, the number of adjustment pads that need to be added between the main frame assembly and the headlamp mounting seat can be seen without repeated disassembly and assembly, thereby greatly saving the time for disassembling and assembling the headlamp.

[0063] The first frame and the second frame are connected by connecting rods, and the connecting rods are located at the four corners of the first frame and the second frame. Of course, connecting rods can also be set in the middle sections of the first frame and the second frame. The connection between the first frame and the second frame is ensured by the connecting rods, and the sealing gasket is also supported. The sealing gasket can be bonded to the connecting rods. The sealing gasket surrounds the first frame and the second frame once and is bonded by an adhesive. Considering the tightness, the side of the sealing gasket can be bonded to the inner side surfaces of the first frame and the second frame respectively; of course, the first frame and the second frame are also connected at the first opening, which is convenient for the setting of fasteners. During the manufacturing process, the first frame and the second frame can be connected as an integrated structural member by the connecting rod.

[0064] It needs to be explained that an adjustment pad 5 can be arranged between the main frame assembly 2 and the headlamp mounting seat, the adjustment pad 5 can be a rubber pad, the outer side of the adjustment pad can be flush with the outer side surface of the first frame body, or the outer side of the adjustment pad is located on the inner side of the outer side surface of the first frame body, and the inner side of the adjustment pad 5 exceeds the second frame body setting, and the adjustment pad can be placed on the lower side of the main frame assembly to facilitate the staff to observe the adjustment pad;

[0065] In some examples, the adjustment pad 5 may be arranged in sections on the lower side of the main frame assembly, and the adjustment pad may be arranged on both sides of the lower side of the main frame assembly according to the space between the lower side of the main frame assembly and the headlamp mounting seat;

[0066] Along the height direction of the main frame assembly, the number of adjustment pads is greater than or equal to 1, and the staff can increase or decrease the number of adjustment pads according to the specific situation; or directly adjust the adjustment pads of different thicknesses according to the space between the lower side of the main frame assembly and the headlamp mounting seat.

[0067] The tooling provided in this embodiment is used for auxiliary positioning of headlamp installation, and has a reasonable structural setting. The main frame assembly is arranged between the headlamp mounting seat and the headlamp, which can effectively ensure the strength and avoid deformation problems caused during the installation and use of the headlamp. The main frame assembly can be installed first, because the main frame assembly is hollow, which facilitates the adjustment of the number of adjustment pads between the main frame assembly and the headlamp mounting seat. There is no need to repeatedly move the headlamp, which reduces rework and improves the installation efficiency of the headlamp. It can not only accurately position and meet the requirements, but also reduce manpower and material resources.

[0068] Embodiment 2

[0069] This embodiment provides a method for installing a rail transit vehicle headlamp, using a rail transit vehicle headlamp auxiliary positioning tool as described in Embodiment 1, including the following contents:

[0070] According to the characteristics of headlamp installation, the main frame assembly 2 is machined according to the actual size of the headlamp housing 3 at a ratio of 1:1. In order to facilitate use and eliminate deformation during use and ensure strength, positioning assemblies 1 are respectively provided on both sides of the main frame assembly;

[0071] The sealing gasket 4 is pasted on the outer peripheral surface of the main frame assembly 2 to ensure that the main frame assembly and the headlamp mounting seat are closely fitted, so that the gap between the main frame assembly 2 and the headlamp mounting seat is uniform, avoiding a large amount of rework and greatly improving efficiency;

[0072] The headlamp mounting base is treated with oil spraying to avoid scratches on the rail transit vehicle body during the research and assembly of the headlamp and avoid rework;

[0073] The staff holds the positioning assembly to clip the main frame assembly 2 into the headlamp mounting seat. Since the positioning assembly 1 is higher than the main frame assembly 2, when the main frame assembly is clipped into the headlamp mounting seat, the surface of the main frame assembly can be flush with the surrounding surface of the rail transit vehicle body headlamp mounting seat;

[0074] Adjust the number of adjustment pads between the main frame assembly 2 and the headlamp mounting seat, because the adjustment pads can be set beyond the second frame, and the main frame assembly is hollow, and the number of adjustment pads 5 that need to be added between the main frame assembly and the headlamp mounting seat can be seen without repeated disassembly and assembly, which greatly saves the time of disassembling and assembling the headlamp;

[0075] drilling a hole for the headlamp mounting base through the second opening of the main frame assembly;

[0076] The positioning pin passes through the second opening 2-2 and the drilled hole of the headlamp mounting base to realize the positioning of the main frame assembly and the headlamp mounting base, and there is no need to lift the headlamp several times to position the headlamp and remove the positioning assembly during the headlamp installation process;

[0077] Spray sealant around the outer surface of the main frame assembly to ensure the sealing between the main frame assembly and the headlamp mounting seat;

[0078] The headlamp is disposed through the main frame assembly 2, and the headlamp housing is connected to the main frame assembly by fasteners such as fastening bolts.

[0079] It should be noted that the headlamp housing 3 is fixed to the peripheral side of the headlamp. In the present application, the main frame assembly and the headlamp housing have the same shape and size, and the position of the third opening corresponds to the position of the first opening. Figure 4 As shown, the headlamp housing 3 is provided with a plurality of third openings 3 - 1 , and the fasteners pass through the third openings and are connected with the first openings.

[0080] The headlamp installation method provided in this embodiment can effectively ensure that the main frame assembly is flush with the rail transit vehicle body around the headlamp mounting seat, and the headlamp mounting seat is sprayed with oil to avoid scratches on the paint on the vehicle body surface; the sealing gasket and the adjustment gasket are set to ensure the fit between the upper side of the headlamp and the headlamp mounting seat, and the setting of the sealant can effectively avoid water leakage and water seepage during the rain test, avoid removing the sealant after leakage, and do not need to repeatedly apply the sealant, which is conducive to reducing costs.

[0081] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A rail transit vehicle headlight auxiliary positioning tool, characterized in that: The main frame assembly comprises a main frame assembly, which is frame-shaped, has the same curvature as the headlamp mounting seat, the headlamp can be clamped in the hollow of the main frame assembly, the shape of the main frame assembly is consistent with the shape of the headlamp housing, the outer side of the main frame assembly is adapted to the headlamp mounting seat, the main frame assembly is provided with a first opening, and the fastener passes through the headlamp housing and is connected to the first opening; Positioning components are respectively arranged on two opposite sides of the main frame component away from the outer side of the headlamp mounting seat, the height of the positioning components is higher than the headlamp mounting seat, and the positioning components are detachably connected to the main frame component; A sealing pad is arranged on the outer peripheral surface of the main frame assembly, and an adjustment pad can be arranged between the lower side surface of the main frame assembly and the headlamp mounting seat.

2. The rail transit vehicle headlight auxiliary positioning tool according to claim 1, characterized in that: The positioning assembly is an L-shaped positioning plate, and the L-shaped positioning plates on both sides of the main frame assembly are arranged opposite to each other.

3. The rail transit vehicle headlight auxiliary positioning tool according to claim 2, characterized in that: One side of the L-shaped positioning plate is connected to the main frame assembly, and the distance between the bending parts of the L-shaped positioning plates on both sides is greater than the length of the main frame assembly.

4. The rail transit vehicle headlight auxiliary positioning tool according to claim 1, characterized in that: The main frame assembly comprises a first frame body and a second frame body, the first frame body is connected to the second frame body, and the sealing gasket is arranged between the outer peripheral surfaces of the first frame body and the second frame body.

5. The rail transit vehicle headlight auxiliary positioning tool according to claim 4, characterized in that: The first frame body and the second frame body are connected through connecting rods, and the connecting rods are located at four corners of the first frame body and the second frame body.

6. The rail transit vehicle headlight auxiliary positioning tool according to claim 1, characterized in that: The inner side of the adjustment pad is arranged beyond the second frame, and a protruding edge is arranged on the inner side surface of the second frame, and a distance is set between two adjacent protruding edges.

7. The rail transit vehicle headlight auxiliary positioning tool according to claim 6, characterized in that: The adjustment pad is placed on the lower side of the main frame assembly; The adjustment pads can be arranged in sections on the lower side of the main frame assembly; Along the height direction of the main frame assembly, the number of the adjustment pads is greater than or equal to 1.

8. The rail transit vehicle headlight auxiliary positioning tool according to claim 1, characterized in that: The main frame assembly is further provided with second openings on both sides of the first opening, and holes can be drilled into the headlamp mounting seat through the second openings.

9. The rail transit vehicle headlight auxiliary positioning tool according to claim 8, characterized in that: Also included is a positioning pin that can be inserted into the second opening and the headlamp mounting seat drilled hole to position the main frame assembly.

10. A method for installing a rail transit vehicle headlamp, characterized in that: A rail transit vehicle headlight auxiliary positioning tool according to any one of claims 1 to 9 comprises the following contents: Process the main frame assembly and the positioning assembly according to the headlamp, and fix the positioning assembly on both sides of the main frame assembly; Adhere a sealing gasket to the outer peripheral surface of the main frame assembly; The headlamp mounting base is oil-sprayed; The staff holds the positioning assembly and inserts the main frame assembly into the headlamp mounting seat, so that the surface of the main frame assembly is flush with the surrounding surface of the rail transit vehicle body headlamp mounting seat; Adjust the number of adjustment pads between the main frame assembly and the headlamp mounting base so that the upper side of the main frame assembly fits the headlamp mounting base; Tighten the main frame assembly and the headlamp mounting base, and remove the positioning assembly; Spray sealant around the outer perimeter of the main frame assembly; The headlamp is arranged through the main frame assembly, and the headlamp housing is connected to the main frame assembly.

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