A new train headlamp

Abstract

The utility model belongs to train lighting equipment technical field especially is a kind of new train headlamp, including shell body, bulb installation component, still including anti-loosening piece, the shell body includes reflecting bowl and light guide cover, installation component includes protective cover, protective gasket, U type clasp spring and flexible sleeve;Reflecting bowl is equipped with central hole, protective cover is passed through the central hole of reflecting bowl and is clamped in the central hole;By setting anti-loosening piece in the mounting hole of reflecting bowl mounting foot, effectively resist the high-frequency vibration when train operation, avoid bolt loosening, drop, prevent headlamp illumination angle deviation or component drop, reduce security risk;Flexible sleeve can absorb the impact force generated by train vibration, reduce the relative sliding friction of bulb and reflecting bowl, avoid bulb surface abrasion, filament loosening;U type clasp spring one end hangs and connects hook, the other end is clamped into L type limiting slot, only need simple operation to compress the limiting convex ring of bulb, installation dismounts conveniently, improves assembly efficiency.

Description

Technical Field

[0001] This utility model belongs to the technical field of train lighting equipment, specifically relating to a new type of train headlight. Background Technology

[0002] Train headlights are a core component that ensures safe train operation at night, in tunnels, or in low-visibility environments such as heavy rain or dense fog. Their lighting stability and structural reliability directly determine the driver's visibility, which in turn affects driving safety.

[0003] Currently, existing train headlights generally suffer from two major technical problems that severely restrict their safety and lifespan: 1. The lamp body and mounting bracket are only fixed with bolts. The continuous high-frequency vibration generated during train operation can easily cause the bolts to loosen or even fall off. This will not only cause the headlight illumination angle to shift, affecting the field of vision coverage, but in extreme cases, it may also cause the headlight components to fall off, posing a safety hazard; 2. After the bulb is installed, it is in rigid contact with the outer shell (mainly the reflector) without a buffer isolation structure. When the train vibrates, the two will generate relative sliding friction. Long-term use can easily lead to wear on the bulb surface and loosening of the filament, which in turn can cause bulb damage, shortened lifespan, or even sudden lighting failure, affecting driving safety.

[0004] To address the aforementioned problems, this utility model proposes a novel train headlight. Utility Model Content

[0005] To address the aforementioned problems in the existing technology, this utility model provides a novel train headlight that is convenient to use, easy to install, highly stable, and highly safe, aiming to solve the problems of loose bolts and rigid friction damage of bulbs in the existing technology.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a novel train headlight, comprising a housing, a bulb disposed within the housing, and a mounting assembly for fixing the bulb to the housing, wherein a limiting protrusion ring is fixed on the bulb, and an anti-loosening component is also included; the housing comprises a reflector and a light guide cover detachably mounted at the port of the reflector; the mounting assembly comprises a protective cover, a protective gasket, a U-shaped retaining spring, and a flexible sleeve.

[0007] The reflector bowl has a central hole, and the protective cover passes through the central hole of the reflector bowl and is fitted into the central hole;

[0008] The protective pad is secured to the extended end of the protective cover, and the light bulb passes through the protective pad;

[0009] The protective cover has a hook and an L-shaped limiting groove at its extended end. One end of the U-shaped retaining spring is hooked to the hook and the other end is inserted into the L-shaped limiting groove to press the limiting protrusion ring.

[0010] The flexible sleeve is fixed inside the protective pad, and the inner wall of the flexible sleeve is tightly fitted to the outer wall of the bulb;

[0011] Multiple anti-loosening components are evenly spaced along the circumference and are detachably disposed on the outer circumference of the reflector bowl for clamping and fixing the bolts used to fix the reflector bowl.

[0012] As a preferred embodiment of this utility model, the outer wall of the protective cover is fixed with a first limiting block, and the first limiting block abuts against the inner wall of the reflector bowl.

[0013] As a preferred embodiment of this utility model, the extended end face of the protective cover is provided with a plurality of positioning grooves evenly distributed along the circumferential direction, and a positioning protrusion adapted to the positioning groove is fixed on the outer circumference of the protective pad.

[0014] As a preferred embodiment of this utility model, the inner wall of the protective cover is fixed with a second limiting block, and the second limiting block abuts against the end face of the protective pad.

[0015] As a preferred embodiment of this utility model, the outer circumference of the reflector bowl is fixed with a plurality of mounting feet that are equally spaced along the circumferential direction, and mounting holes are provided on the mounting feet, and the anti-loosening component is detachably disposed in the mounting holes.

[0016] As a preferred technical solution of this utility model, the anti-loosening component includes a main body and a V-shaped elastic component;

[0017] The main body is provided with threaded holes;

[0018] The diameter of the main body is larger than the inner diameter of the mounting hole, and the V-shaped elastic element is integrally formed on one end of the main body and passes through the mounting hole;

[0019] The V-shaped elastic element has a guide hole that communicates with the threaded hole, and a wedge block is provided on the outer wall of the V-shaped elastic element.

[0020] As a preferred embodiment of this utility model, the anti-loosening component further includes a guide sleeve;

[0021] The guide sleeve is integrally formed on the end of the main body away from the V-shaped elastic element, and a tapered hole communicating with the threaded hole is provided on the guide sleeve.

[0022] As a preferred technical solution of this utility model, the outer wall of the reflector bowl is provided with multiple heat dissipation structures evenly distributed along the circumferential direction.

[0023] As a preferred embodiment of this utility model, the heat dissipation structure is a finned heat dissipation protrusion or a heat dissipation groove.

[0024] Compared with the prior art, the beneficial effects of this utility model are:

[0025] 1. By setting anti-loosening components in the mounting holes of the reflector bowl mounting feet, the V-shaped elastic element passes through the mounting hole, and the wedge block can form an elastic clamping force with the inner wall of the mounting hole. Combined with the threaded connection of the threaded hole and the bolt, it provides double anti-loosening, effectively resists high-frequency vibration during train operation, avoids bolt loosening and falling off, prevents headlight illumination angle deviation or component falling off, and reduces safety hazards.

[0026] 2. The flexible sleeve in the mounting assembly is fixed inside the protective gasket, and the inner wall is tightly fitted to the outer wall of the bulb, so that the bulb and the reflector form a flexible contact, replacing the traditional rigid connection. This can absorb the impact force generated by train vibration, reduce the relative sliding friction between the bulb and the reflector, avoid bulb surface wear and filament loosening, reduce the probability of bulb damage and sudden lighting failure, and ensure lighting continuity.

[0027] 3. The extended end of the protective cover is equipped with a positioning groove, and the positioning protrusion of the protective pad is adapted to it. With the limiting effect of the first limiting block (which abuts against the inner wall of the reflector bowl) and the second limiting block (which abuts against the end face of the protective pad), the protective pad and the bulb can be quickly and accurately positioned. One end of the U-shaped spring clip is attached to the hook, and the other end is inserted into the L-shaped limiting groove. The limiting protrusion of the bulb can be pressed with simple operation, making installation and disassembly convenient and improving assembly efficiency.

[0028] Other additional advantages and beneficial effects of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this invention. Attached Figure Description

[0029] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0030] Figure 1 This is a schematic diagram of the structure of this utility model;

[0031] Figure 2 This is an exploded structural diagram of the present invention;

[0032] Figure 3 This is an isometric structural diagram of the protective cover in this utility model;

[0033] Figure 4 This is a schematic diagram of the isometric structure of the anti-loosening component in this utility model.

[0034] In the diagram: 1. Outer shell; 11. Reflector bowl; 111. Mounting foot; 1111. Mounting hole; 112. Heat dissipation structure; 12. Light guide cover; 2. Bulb; 21. Limiting protrusion ring; 3. Mounting assembly; 31. Protective cover; 311. Hook; 312. L-shaped limiting groove; 313. Positioning groove; 314. First limiting block; 315. Second limiting block; 34. Flexible sleeve; 32. Protective gasket; 321. Positioning protrusion; 33. U-shaped retaining ring; 4. Anti-loosening component; 41. Main body; 411. Threaded hole; 42. Guide sleeve; 421. Tapered hole; 43. V-shaped elastic component; 431. Guide hole; 432. Wedge block. Detailed Implementation

[0035] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0036] Please see Figures 1-4 The present invention provides the following technical solution: a novel train headlight, comprising a housing 1, a bulb 2 disposed within the housing 1, and a mounting assembly 3 for fixing the bulb 2 to the housing 1. A limiting protrusion ring 21 is fixed on the bulb 2, and an anti-loosening component 4 is also included. The housing 1 includes a reflector bowl 11 and a light guide cover 12 detachably mounted at the port of the reflector bowl 11. The mounting assembly 3 includes a protective cover 31, a protective pad 32, a U-shaped retaining spring 33, and a flexible sleeve 34.

[0037] Furthermore, by Figures 1-3As shown, in this embodiment, the reflector bowl 11 has a central hole, and the protective cover 31 passes through the central hole of the reflector bowl 11 and is locked inside the central hole; the protective pad 32 is locked at the extended end of the protective cover 31, and the bulb 2 passes through the protective pad 32; a hook 311 and an L-shaped limiting groove 312 are provided at the extended end of the protective cover 31, one end of the U-shaped retaining spring 33 is hooked to the hook 311, and the other end is locked into the L-shaped limiting groove 312 for pressing the limiting protrusion ring 21; the flexible sleeve 34 is fixed inside the protective pad 32, and the inner wall of the flexible sleeve 34 is tightly attached to the outer wall of the bulb 2; multiple anti-loosening parts 4 are evenly distributed along the circumferential direction and are detachably set on the outer circumference of the reflector bowl 11 for clamping the bolts used to fix the reflector bowl 11. After adopting the above scheme, when using, the protective cover 31 is first inserted axially along the central hole of the reflector bowl 11 so that the protective cover 31 and the reflector bowl 11 form a radial fixation, providing a stable reference for the subsequent installation of the bulb 2.

[0038] The protective pad 32 is inserted from the protruding end of the protective cover 31 (the end away from the reflective surface of the reflector bowl 11) to achieve the positioning of the protective pad 32.

[0039] Insert the bulb 2 through the center hole of the protective pad 32 until the limiting protrusion 21 on the bulb 2 is in contact with the end face of the protective pad 32. At this time, the light-emitting part of the bulb 2 is directly facing the reflection focal point of the reflector bowl 11.

[0040] One end of the U-shaped retaining spring 33 is hooked onto the hook 311 of the protective cover 31, and the other end is pushed into the axial groove of the L-shaped limiting groove 312. Then, it is rotated and inserted into the transverse limiting section of the L-shaped limiting groove 312, so that the middle part of the U-shaped retaining spring 33 presses against the limiting protrusion 21. Through the elastic preload of the U-shaped retaining spring 33, the bulb 2 is axially locked to prevent it from moving axially along the protective cover 31.

[0041] The flexible sleeve 34 is pre-attached to the inner wall of the center hole of the protective gasket 32. When the bulb 2 passes through the protective gasket 32, the inner wall of the flexible sleeve 34 fits tightly against the outer wall of the bulb 2. This not only fills the gap through the deformation of the flexible material (such as silicone) to form a radial seal, but also creates a buffer layer between the bulb 2 and the protective gasket 32 ​​to absorb the vibration and impact during subsequent use.

[0042] The light guide cover 12 can be detachably installed on the port of the reflector bowl 11 by means of bolts or threaded engagement, so that the light guide cover 12 covers the open end of the reflector bowl 11, forming a complete protective shell.

[0043] Multiple anti-loosening parts 4 are evenly distributed along the outer circumference of the reflector bowl 11 and fixed to the outer wall of the reflector bowl 11 by snap-fit. The clamping end of each anti-loosening part 4 is fitted with a fixing bolt for the reflector bowl 11 to be installed on the train lamp holder, so as to realize the anti-loosening locking of the bolt.

[0044] The reflector bowl 11 uses its parabolic or freeform surface structure to converge and reflect the light emitted by the bulb 2 into a parallel beam (or a beam at a preset angle). The light distribution is then corrected by the optical texture (such as a prism structure) of the light guide cover 12 to ensure the lighting range and brightness required for train operation.

[0045] The elastic clamping force of the U-shaped retaining ring 33 continuously acts on the limiting protrusion ring 21 to prevent the bulb 2 from shifting axially due to high-frequency vibration during train operation, thereby preventing the bulb 2 from deviating from the focal point of the reflector bowl 11 and ensuring that the lighting spot does not shift and the brightness does not decrease.

[0046] Preferably, by Figures 1-3 As shown in this embodiment, the outer wall of the protective cover 31 is fixed with a first limiting block 314, and the first limiting block 314 abuts against the inner wall of the reflector bowl 11. With the above solution, during use, the abutting cooperation between the first limiting block 314 and the inner wall of the reflector bowl 11 prevents the protective cover 31 from radially shifting or shaking in the center hole of the reflector bowl 11, ensuring that the bulb 2 is always aligned with the reflective focal point of the reflector bowl 11, ensuring the headlight beam convergence effect, and preventing the illumination spot from shifting and the brightness from decreasing.

[0047] This reduces the stress on the protective cover 31 and the center hole of the reflector bowl 11, decreases the impact and wear of the two structures caused by high-frequency vibrations during train operation, extends the service life of the protective cover 31 and the reflector bowl 11, and improves the overall structure's vibration resistance stability.

[0048] Preferably, by Figure 1 and Figure 2 As shown in this embodiment, the extended end face of the protective cover 31 is provided with a plurality of positioning grooves 313 evenly distributed along the circumferential direction. Positioning protrusions 321 that are adapted to the positioning grooves 313 are fixed on the outer circumference of the protective pad 32. With the above solution, during use, the positioning protrusions 321 and the positioning grooves 313 are matched and engaged to prevent the protective pad 32 from rotating circumferentially due to the high-frequency vibration of the train during use. This ensures that the protective pad 32 always maintains the preset posture, thereby ensuring the fit stability of the flexible sleeve 34 and the bulb 2, and avoiding problems such as wear and sealing failure of the flexible sleeve 34 due to relative rotation.

[0049] During assembly, the positioning protrusion 321 can be quickly guided and aligned along the positioning groove 313. Without repeatedly adjusting the circumferential angle of the protective pad 32, the protective pad 32 and the protective cover 31 can form a precise fit, reducing assembly errors and improving assembly consistency during mass production.

[0050] Multiple positioning grooves 313 and positioning protrusions 321 distributed at equal intervals along the circumference work together to evenly disperse the circumferential torque generated by train vibration, reduce local stress concentration at the mating parts of the protective pad 32 and the protective cover 31, avoid deformation of the mating structure, and extend the service life of both.

[0051] Preferably, by Figures 1-3 As shown in this embodiment, a second limiting block 315 is fixed to the inner wall of the protective cover 31, and the second limiting block 315 abuts against the end face of the protective pad 32. With the above solution, during use, the abutting cooperation between the second limiting block 315 and the end face of the protective pad 32 directly restricts the protective pad 32 from moving along the axis of the protective cover 31 into the reflector bowl 11, avoiding displacement of the protective pad 32 due to high-frequency vibration of the train, thereby ensuring the tight fit between the flexible sleeve 34 and the outer wall of the bulb 2, preventing the formation of sealing gaps, and maintaining the dustproof and waterproof effect.

[0052] During assembly, the second limiting block 315 can serve as the installation reference for the protective gasket 32, enabling the protective gasket 32 ​​to be quickly positioned to the preset axial position. This ensures the fitting accuracy between the protective gasket 32 ​​and the limiting protrusion ring 21 and the U-shaped retaining ring 33 without repeated adjustments, reducing assembly errors and improving the component compatibility stability during mass production.

[0053] When the U-shaped retaining ring 33 applies axial pressure to the limiting protrusion ring 21, the protective gasket 32 ​​will be subjected to a reverse force. The second limiting block 315 provides axial support to the protective gasket 32 ​​by abutting its end face, and transmits the force to the main body of the protective cover 31, so as to prevent the protective gasket 32 ​​from deforming or being damaged due to excessive local force, and extend the service life of the protective gasket 32.

[0054] Optionally, by Figure 1 As shown in this embodiment, the outer circumference of the reflector bowl 11 is fixed with a plurality of mounting feet 111 evenly distributed along the circumferential direction, and mounting holes 1111 are provided on the mounting feet 111. The anti-loosening component 4 is detachably installed in the mounting holes 1111. With the above solution, when in use, the plurality of mounting feet 111 on the outer circumference of the reflector bowl 11 are evenly distributed along the circumference to form a uniform circumferential mounting reference surface. During assembly, the end face of each mounting foot 111 is fitted with the preset mounting plane of the train lamp holder, so that the reflector bowl 11 achieves preliminary alignment with the lamp holder through the mounting feet 111, avoiding the tilting of the illumination angle caused by the offset of the mounting point of the reflector bowl 11. At this time, the mounting holes 1111 on the mounting feet 111 are precisely aligned with the bolt holes on the lamp holder, providing a coaxial assembly channel for the anti-loosening component 4.

[0055] After all mounting feet 111 are fitted with anti-loosening components 4 in their mounting holes 1111, the anti-loosening components 4, through their cooperation with the lamp holder connecting bolts, tightly press the mounting feet 111 onto the lamp holder plane, thereby fixing the reflector bowl 11 as a whole onto the lamp holder. Because the mounting feet 111 are evenly distributed around the circumference, the clamping force of each anti-loosening component 4 is evenly distributed along the circumference of the reflector bowl 11, ensuring that the reflector bowl 11 is under balanced force and avoiding deformation of the reflector bowl 11 caused by local compression.

[0056] Optionally, by Figure 1and Figure 4 As shown, in this embodiment, the anti-loosening component 4 includes a main body 41 and a V-shaped elastic component 43; the main body 41 is provided with a threaded hole 411; the diameter of the main body 41 is larger than the inner diameter of the mounting hole 1111; the V-shaped elastic component 43 is integrally formed on one end of the main body 41 and passes through the mounting hole 1111; the V-shaped elastic component 43 is provided with a guide hole 431 communicating with the threaded hole 411, and a wedge block 432 is provided on the outer side wall of the V-shaped elastic component 43. After adopting the above scheme, in use, one end of the V-shaped elastic component 43 of the anti-loosening component 4 is aligned with the mounting hole 1111 of the mounting foot 111, and pressure is applied along the axial direction: since the V-shaped elastic component 43 has elastic deformation capability, after being pressed, its two sides move towards the center. The core contracts, reducing the overall outer diameter of the V-shaped elastic element 43, allowing it to smoothly pass through the mounting hole 1111. Once the V-shaped elastic element 43 has completely passed through the mounting hole 1111, its two arms are released from pressure constraints and elastically reset. At this time, the wedge-shaped block 432 on the outer wall of the V-shaped elastic element 43 abuts against the inner wall of the mounting hole 1111. Simultaneously, because the diameter of the main body 41 is larger than the inner diameter of the mounting hole 1111, it fits against the outer end face of the mounting foot 111, forming a two-way axial fixation of "outer limit of the main body 41 + inner clamping of the wedge-shaped block 432". This ensures that the anti-loosening part 4 is stably assembled in the mounting hole 1111, and pre-fixation can be achieved without additional fasteners, preventing the anti-loosening part 4 from falling off during assembly.

[0057] The connecting bolts of the train lamp holder are screwed into the threaded hole 411. The axial preload is applied through the threaded engagement, so that the mounting foot 111 is tightly clamped between the main body 41 and the lamp holder, thereby achieving a fixed connection between the reflector bowl 11 and the lamp holder.

[0058] After the connecting bolt passes through the guide hole 431, the elastic force of the V-shaped elastic element 43 will clamp the connecting bolt inward, further improving the anti-loosening effect of the connecting bolt.

[0059] When the high-frequency vibration generated by the train operation is transmitted to the anti-loosening component 4 through the lamp holder, the V-shaped structure of the V-shaped elastic component 43 can absorb the vibration energy through its own elastic deformation, converting the rigid vibration into the potential energy of elastic deformation and releasing it. This avoids the vibration stress being directly transmitted to the mating part of the bolt and the threaded hole 411, reducing thread wear and loosening tendency, while also reducing the impact of vibration on the reflective structure of the reflector bowl 11 and ensuring lighting stability.

[0060] Preferably, by Figure 1 and Figure 4As shown in this embodiment, the anti-loosening component 4 also includes a guide sleeve 42. The guide sleeve 42 is integrally formed on the end of the main body 41 away from the V-shaped elastic component 43, and a tapered hole 421 communicating with the threaded hole 411 is provided on the guide sleeve 42. With the above solution, when in use, the tapered hole 421 is designed with an flared opening and is coaxially communicating with the threaded hole 411. During assembly, the inclined surface of the tapered hole 421 can guide the connecting bolt of the train lamp holder to quickly align with the threaded hole 411, avoiding thread damage caused by bolt axis offset, while reducing the difficulty of assembly alignment in a narrow space and significantly improving assembly efficiency.

[0061] The integrated molding structure of the guide sleeve 42 and the main body 41 ensures the coaxiality accuracy of the tapered hole 421 and the threaded hole 411, allowing the bolt to be smoothly screwed into the threaded hole 411 along the axial direction, avoiding the additional bending moment caused by bolt tilting, reducing local stress concentration on the threaded mating surface, and extending the service life of the anti-loosening part 4 and the bolt.

[0062] Preferably, by Figure 1 and Figure 2 As shown in this embodiment, the outer wall of the reflector bowl 11 is provided with a plurality of heat dissipation structures 112 that are equally spaced along the circumference. With the above solution, when in use, the plurality of heat dissipation structures 112 are equally spaced along the outer circumference of the reflector bowl 11, which can fully expand the contact area between the reflector bowl 11 and the air. At the same time, the heat generated when the bulb 2 is working is evenly conducted along the side wall of the reflector bowl 11 to each heat dissipation structure 112, avoiding the accumulation of heat in a local area. The heat is quickly dissipated to the outside through convection heat transfer, effectively reducing the working temperature of the reflector bowl 11 and the inside of the outer shell 1.

[0063] Optionally, by Figure 1 and Figure 2 As shown in this embodiment, the heat dissipation structure 112 is a finned heat dissipation protrusion or a heat dissipation groove. With the above solution, if a heat dissipation protrusion is used, the heat generated when the bulb 2 is working is transferred to the inner wall of the reflector bowl 11 through heat conduction. Since the reflector bowl 11 is an integral structure, the heat is quickly conducted to the finned heat dissipation protrusion on its outer wall. The finned structure increases the contact area with air, so that the heat is evenly distributed to the surface of each heat dissipation protrusion, avoiding the local accumulation of heat in the reflector bowl 11.

[0064] If a heat dissipation trough is used, the heat generated by the bulb 2 is conducted to the outer wall through the inner wall of the reflector bowl 11. The trough wall and bottom of the heat dissipation trough become heat conduction carriers. Compared with the planar sidewall, the trough structure increases the effective heat dissipation area of ​​the inner wall surface, extends the heat conduction path and expands the heat exchange interface, so that the heat is transferred from the reflector bowl 11 to the outside air more efficiently.

[0065] Components not described in detail in this article are existing technologies.

[0066] The working principle and usage process of this utility model: When using the train headlight of this utility model, the protective cover 31 is first inserted axially along the central hole of the reflector bowl 11. The first limiting block 314 on the outer wall of the protective cover 31 abuts against the inner wall of the reflector bowl 11 to limit the radial displacement of the protective cover 31. At the same time, the cooperation between the protective cover 31 and the central hole is used to achieve initial fixation and provide a stable reference for the installation of the bulb 2.

[0067] The protective pad 32 is inserted from the protruding end of the protective cover 31. The positioning protrusion 321 on the outer circumference of the protective pad 32 is matched and engaged with the positioning groove 313 on the end face of the protruding end of the protective cover 31 to achieve circumferential positioning of the two. At the same time, the second limiting block 315 on the inner wall of the protective cover 31 abuts against the end face of the protective pad 32, restricting the axial movement of the protective pad 32 into the reflector bowl 11, and ensuring that the protective pad 32 is in the preset assembly position.

[0068] The bulb 2 is passed through the protective pad 32 (the inner wall of the flexible sleeve 34 inside the protective pad 32 is tightly fitted to the outer wall of the bulb 2) until the limiting protrusion 21 of the bulb 2 is fitted to the end face of the protective pad 32; one end of the U-shaped retaining spring 33 is hooked onto the hook 311 of the protective cover 31, and the other end is pushed in along the L-shaped limiting groove 312 and rotated to engage. The elastic preload of the U-shaped retaining spring 33 presses the limiting protrusion 21, forming a "bidirectional axial limit" with the second limiting block 315 to prevent the bulb 2 from shifting;

[0069] The light guide cover 12 is installed on the port of the reflector bowl 11 through a detachable structure (bolts or threaded engagement, etc.), covering the open end of the reflector bowl 11 to form a complete outer shell for protection, while providing an optical correction channel for light output;

[0070] The mounting feet 111 (with mounting holes 1111) on the outer circumference of the reflector bowl 11 fit against the train lamp holder, and the mounting holes 1111 are aligned with the lamp holder bolt holes. The V-shaped elastic element 43 of the anti-loosening component 4 is aligned with the mounting hole 1111 and pressure is applied. After the V-shaped elastic element 43 deforms, it passes through the mounting hole 1111. After resetting, the wedge-shaped block 432 on the outer side wall engages with the inner wall of the mounting hole 1111. The main body 41 of the anti-loosening component 4 (with a diameter larger than the inner diameter of the mounting hole 1111) fits against the outer side of the mounting feet 111, forming an axial fixation. The lamp holder connecting bolt is inserted along the tapered hole 421 (coaxial with the threaded hole 411) of the guide sleeve 42 of the anti-loosening component 4, and the threaded hole 411 is screwed in, so that the mounting feet 111 are clamped between the main body 41 and the lamp holder, completing the overall fixation of the reflector bowl 11.

[0071] The fin-shaped heat dissipation protrusions / heat dissipation grooves on the outer wall of the reflector bowl 11 are evenly distributed along the circumference. During the assembly stage, they form an integral structure with the reflector bowl 11, reserving a channel for heat conduction and dissipation in the subsequent use stage.

[0072] The reflector bowl 11 uses its parabolic or freeform surface structure to converge and reflect the light emitted by the bulb 2 into a parallel beam (or a beam at a preset angle), and then the light distribution is corrected by the optical texture (such as a prism structure) of the light guide cover 12 to ensure the lighting range and brightness required for train operation.

[0073] The elastic clamping force of the U-shaped retaining ring 33 continuously acts on the limiting protrusion ring 21 to prevent the bulb 2 from shifting axially due to high-frequency vibration during train operation, thereby preventing the bulb 2 from deviating from the focal point of the reflector bowl 11 and ensuring that the lighting spot does not shift and the brightness does not decrease.

[0074] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A novel train headlight, comprising a housing (1), a bulb (2) disposed within the housing (1), and a mounting assembly (3) for fixing the bulb (2) to the housing (1), wherein a limiting ring (21) is fixed on the bulb (2), characterized in that: It also includes an anti-loosening component (4), the outer shell (1) includes a reflector bowl (11) and a light guide cover (12) that can be detachably installed at the port of the reflector bowl (11), and the mounting assembly (3) includes a protective cover (31), a protective pad (32), a U-shaped retaining ring (33) and a flexible sleeve (34); The reflector bowl (11) has a central hole, and the protective cover (31) passes through the central hole of the reflector bowl (11) and is fitted into the central hole; The protective pad (32) is secured to the extended end of the protective cover (31), and the light bulb (2) passes through the protective pad (32); The protective cover (31) has a hook (311) and an L-shaped limiting groove (312) at its extended end. One end of the U-shaped snap ring (33) is hooked to the hook (311) and the other end is inserted into the L-shaped limiting groove (312) to press the limiting protrusion ring (21). The flexible sleeve (34) is fixed inside the protective pad (32), and the inner wall of the flexible sleeve (34) is tightly attached to the outer wall of the bulb (2); Multiple anti-loosening components (4) are evenly distributed along the circumferential direction and are detachably disposed on the outer circumference of the reflector bowl (11) for clamping and fixing the bolts used to fix the reflector bowl (11).

2. The novel train headlight according to claim 1, characterized in that: The outer wall of the protective cover (31) is fixed with a first limiting block (314), and the first limiting block (314) abuts against the inner wall of the reflector bowl (11).

3. A novel train headlight according to claim 1, characterized in that: The protective cover (31) has multiple positioning grooves (313) that are evenly distributed along the circumferential direction on its extended end face, and a positioning protrusion (321) that matches the positioning groove (313) is fixed on the outer circumference of the protective pad (32).

4. A novel train headlight according to claim 1, characterized in that: The inner wall of the protective cover (31) is fixed with a second limiting block (315), and the second limiting block (315) abuts against the end face of the protective pad (32).

5. A novel train headlight according to claim 1, characterized in that: The outer circumference of the reflector bowl (11) is fixed with a plurality of mounting feet (111) that are equally spaced along the circumferential direction, and mounting holes (1111) are provided on the mounting feet (111). The anti-loosening component (4) is detachably disposed in the mounting holes (1111).

6. A novel train headlight according to claim 5, characterized in that: The anti-loosening component (4) includes a main body (41) and a V-shaped elastic component (43); The main body (41) is provided with a threaded hole (411); The diameter of the main body (41) is larger than the inner diameter of the mounting hole (1111), and the V-shaped elastic element (43) is integrally formed on one end of the main body (41) and passes through the mounting hole (1111); The V-shaped elastic element (43) has a guide hole (431) communicating with the threaded hole (411), and a wedge block (432) is provided on the outer side wall of the V-shaped elastic element (43).

7. A novel train headlight according to claim 6, characterized in that: The anti-loosening component (4) also includes a guide sleeve (42); The guide sleeve (42) is integrally formed on the end of the main body (41) away from the V-shaped elastic element (43), and a tapered hole (421) communicating with the threaded hole (411) is provided on the guide sleeve (42).

8. A novel train headlight according to claim 1, characterized in that: The outer wall of the reflector bowl (11) is provided with multiple heat dissipation structures (112) that are equally spaced along the circumference.

9. A novel train headlight according to claim 8, characterized in that: The heat dissipation structure (112) is a finned heat dissipation protrusion or a heat dissipation groove.

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