Vehicle head assembly and rail transit vehicle

Abstract

The invention discloses a vehicle head assembly and a rail transit vehicle, and relates to the technical field of rail transit vehicles. The vehicle head assembly comprises two functional assemblies distributed in the transverse direction of a bogie; each functional assembly comprises a sand box, a sanding arm located on the front side of the sand box in the longitudinal direction of the bogie and provided with a sanding nozzle at the bottom end, a sanding hose connected between the bottom of the sand box and the sanding nozzle, and a rim lubricating hose connected between the front side of the sand box and the sanding arm. In the transverse direction of the bogie, the sanding hose is located on the inner side of the rim lubricating hose; in the vertical direction of the bogie, the sanding hose is located below the rim lubricating hose. The sand spraying hose and the rim lubricating hose are reasonably arranged, the swing range of the sand spraying hose is located below the swing range of the rim lubricating hose, the swing ranges of the two hoses are staggered, and friction between the two hoses in the swing process of the bogie is avoided. By means of the arrangement mode, the risk that the hose is abraded and fails is reduced, and the running safety of the whole vehicle is effectively improved.

Description

Technical Field

[0001] The present invention relates to, and in particular to the technical field of rail transit vehicles. The present invention also relates to a front-end assembly and a rail transit vehicle. Background Art

[0002] To reduce air resistance, the front ends of rail transit vehicles are usually designed with a streamlined shape, making the front end of the vehicle head relatively flat, which results in a compact internal space of the vehicle head. However, the vehicle head usually installs key components such as cab equipment, electrical control systems, sand boxes, sanding devices, and wheel flange lubrication devices, making the available space at the bottom of the vehicle head extremely limited. In this limited space, the installation positions of the sand box, the sanding hose of the sanding device, and the wheel flange lubrication hose of the wheel flange lubrication device need to be precisely matched with the positions of the obstacle eliminator and the sanding arm of the bogie to ensure that each component can operate normally and achieve its functions.

[0003] An obstacle eliminator and a sanding arm are usually installed at the front end of the bogie. During operation, the bogie will swing with the track conditions, and the obstacle eliminator and the sanding arm will also move accordingly, driving the sanding hose and the wheel flange lubrication hose to move with the swing of the bogie. However, due to the limited space at the bottom of the vehicle head, the sanding hose and the wheel flange lubrication hose may interfere during the dynamic process. Especially when the bogie swings significantly, friction may occur between the two hoses or between the hoses and the vehicle body, resulting in hose wear and even functional failure, seriously affecting the service life of the hoses and posing a potential safety hazard to the safe operation of rail transit vehicles. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to provide a front-end assembly and a rail transit vehicle, which solve the technical problem of the existing threat to driving safety caused by hose wear by optimizing the front-end assembly so that the swing ranges of the sanding hose and the wheel flange lubrication hose are staggered from each other.

[0005] To achieve the above purpose, the present invention provides a front-end assembly, including two sets of functional components distributed transversely along the bogie; each set of functional components includes:

[0006] A sand box;

[0007] A sanding arm located longitudinally in front of the sand box along the bogie and having a sanding nozzle at its bottom end;

[0008] A sanding hose connecting the bottom of the sand box and the sanding nozzle;

[0009] A wheel flange lubrication hose connecting the front side of the sand box and the sanding arm;

[0010] Transversely along the bogie, the sanding hose is located inside the wheel flange lubrication hose;

[0011] Vertically along the bogie, the sand spreading hose is located below the flange lubrication hose.

[0012] In some embodiments, the two sets of functional components are symmetrically arranged with the longitudinal center line of the car body as the reference; longitudinally along the bogie, on the side close to the front of the vehicle, the distance between the two sets of functional components gradually decreases.

[0013] In some embodiments, each set of functional components further includes a hose sling chain hingedly connected to the sling chain fixing plate provided on the cowcatcher; transversely along the bogie, the sand spreading hose is located outside the sling chain fixing plate;

[0014] An anti - detachment pipe clamp is fixedly sleeved on the middle section of the sand spreading hose, and one end of the hose sling chain far from the sling chain fixing plate is hingedly connected to the anti - detachment pipe clamp. The hose sling chain is connected to the sand spreading hose transversely along the bogie to bend the sand spreading hose into a C - shape or an S - shape.

[0015] In some embodiments, the anti - detachment pipe clamp has two independent clamping sleeves, one of which is fixedly sleeved on the outer periphery of the sand spreading hose, and the other is fixedly sleeved on the outer periphery of the tracing heat line;

[0016] The straight - line distance between the end of the sand spreading hose connected to the sand spreading nozzle and the anti - detachment pipe clamp is a set length, and the range of the set length is 300mm - 450mm.

[0017] In some embodiments, a sand spreading joint is fixedly provided at the bottom of the sand box, an outlet of the sand spreading joint is fixedly provided with an outlet sand joint, a transition joint is fixedly provided on the sand spreading nozzle, and an S - shaped structure is formed between the outlet sand joint and the first end of the sand spreading hose and between the transition joint and the second end of the sand spreading hose;

[0018] Vertically along the bogie, the outlet sand joint is arranged higher than the transition joint.

[0019] In some embodiments, a reference plane is formed at the bottom of the sand spreading joint; vertically along the bogie, the center line of the end of the outlet sand joint connected to the sand spreading hose is arranged at a set angle with the reference plane.

[0020] In some embodiments, each set of functional components further includes a flange lubrication pipe fixing seat provided on the side of the sand box facing the sand spreading arm. A partition joint is fixedly installed through the flange lubrication pipe fixing seat. A hinge support is fixedly provided on the side of the sand spreading arm facing the sand box, and a rotating joint is hinged to the hinge support. The flange lubrication hose is spirally connected between the partition joint and the rotating joint.

[0021] In some embodiments, each set of functional components further includes a flange lubrication hard pipe, and the flange lubrication hard pipe and the flange lubrication hose are respectively fixedly connected to the two ends of the partition joint;

[0022] Transversely along the bogie, the flange lubrication hard pipe is located above the flange lubrication hose;

[0023] The fixing seat of the wheel flange lubrication pipe is bent and provided with an inclined flanging. The partition joint vertically penetrates through the inclined flanging so that the central line of the partition joint forms a preset angle with the front side of the sand box, and the range of the preset angle is 25° to 40°.

[0024] In some embodiments, an adjustment sliding groove is formed on one side of the sand box facing the sand spraying arm, and the fixing seat of the wheel flange lubrication pipe is slidably arranged in the adjustment sliding groove; a first locking bolt that abuts against the adjustment sliding groove is penetrated through the fixing seat of the wheel flange lubrication pipe;

[0025] Each group of functional components further includes a sand spraying air supply rigid pipe connected to the sand spraying joint and a fixing seat of the sand spraying air supply pipe connected to the sand spraying air supply rigid pipe. The fixing seat of the sand spraying air supply pipe is slidably arranged in the adjustment sliding groove; the fixing seat of the sand spraying air supply pipe is provided with a second locking bolt that abuts against the adjustment sliding groove.

[0026] In some embodiments, along the transverse direction of the bogie, the fixing seat of the wheel flange lubrication pipe is located outside the fixing seat of the sand spraying air supply pipe;

[0027] Along the transverse direction of the bogie, the sand spraying air supply rigid pipe is located between the sand spraying hose and the wheel flange lubrication hose;

[0028] Along the vertical direction of the bogie, the sand spraying air supply rigid pipe is arranged higher than the sand spraying hose.

[0029] The present invention also provides a rail transit vehicle, including the above-mentioned head assembly.

[0030] Compared with the background art, each group of functional components of the head assembly of the present invention includes a sand box, a sand spraying arm, a sand spraying hose and a wheel flange lubrication hose. Along the longitudinal direction of the bogie, the sand spraying arm is located in front of the sand box; a sand spraying nozzle is provided at the bottom of the sand spraying arm; the sand spraying hose is connected between the bottom of the sand box and the sand spraying nozzle, and the wheel flange lubrication hose is connected between the front side of the sand box and the sand spraying arm.

[0031] Crucially, along the transverse direction of the bogie, the sand spraying hose is located inside the wheel flange lubrication hose; along the vertical direction of the bogie, the sand spraying hose is located below the wheel flange lubrication hose. By reasonably arranging the sand spraying hose and the wheel flange lubrication hose, it is ensured that the two can be completely staggered. In this way, the swinging range of the sand spraying hose is located below the swinging range of the wheel flange lubrication hose, and the swinging ranges of the two hoses are staggered from each other, avoiding friction between the two hoses during the swinging of the bogie. This arrangement method reduces the risk of hose wear and failure, extends the service life of the hose, reduces the failure rate, and thus effectively improves the running safety of the whole vehicle. Description of the Drawings

[0032] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on the provided drawings.

[0033] Figure 1 The front view of the front-end assembly provided by a specific embodiment of the present invention;

[0034] Figure 2 is Figure 1 The assembly drawing of the remaining components after removing the tracing heat pipe in

[0035] Figure 3 is Figure 2 The front view of

[0036] Figure 4 is Figure 2 The side view of

[0037] Figure 5 is Figure 4 The partial enlarged view of

[0038] Figure 6 is Figure 2 The enlarged view of

[0039] Figure 7 is Figure 2 The assembly drawing of the chain fixing plate, hose chain and anti-disconnection pipe clamp in

[0040] Figure 8 is Figure 2 Another view of

[0041] Figure 9 is Figure 3 The partial enlarged view of

[0042] The reference numerals are as follows:

[0043] Sand box 1, sand spreading arm 2, sand spreading hose 3, flange lubrication hose 4, chain fixing plate 5, hose chain 6, anti-disconnection pipe clamp 7, tracing heat pipe 8, sand spreading joint 9, sand outlet joint 10, transition joint 11, flange lubrication pipe fixing seat 12, partition joint 13, rotating joint 14, flange lubrication hard pipe 15, adjusting chute 16, first locking bolt 17, sand spreading air supply hard pipe 18, sand spreading air supply pipe fixing seat 19 and second locking bolt 20;

[0044] Sand spreading nozzle 21 and hinge support 22;

[0045] Clamping sleeve 71;

[0046] Inclined flanging 121. Detailed implementation manners

[0047] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0048] In order to enable those skilled in the art of the present technology to better understand the solutions of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0049] First of all, it should be noted that the longitudinal direction of the bogie in the text refers to the length direction of the bogie, specifically the Y-axis direction in the attached Figure 2 ; the transverse direction of the bogie in the text refers to the width direction of the bogie, specifically the X-axis direction in the attached Figure 2 ; the vertical direction of the bogie in the text refers to the height direction of the bogie, specifically the Z-axis direction in the attached Figure 2 .

[0050] An embodiment of the present invention discloses a front-end assembly, which includes two groups of functional components distributed along the transverse direction of the bogie, and the two groups of functional components are respectively arranged on both sides of the bogie. The functional components integrate the functions of sand spraying and wheel flange lubrication, realizing a compact layout of the sand spraying device and the wheel flange lubrication device to adapt to the limited installation space at the bottom of the front end of the locomotive head.

[0051] As shown in the attached Figures 1 to 3 , each group of functional components includes a sand box 1, a sand spraying arm 2, a sand spraying hose 3 and a wheel flange lubrication hose 4. The sand box 1 is filled with sand for increasing the friction of the track. A conical diversion head is formed at the bottom of the sand box 1 for guiding the sand in the sand box 1 to flow out quickly. The sand box 1 is fixedly arranged. In addition to accommodating sand, it can also provide support for the wheel flange lubrication hose 4, the wheel flange lubrication hard pipe 15 and two sand spraying air supply hard pipes 18, ensuring that each pipeline is as close as possible to the front side wall of the sand box 1 to reasonably utilize the limited installation space.

[0052] As shown in the attached Figure 2As shown, the sand-spreading arm 2 is located at the front side of the sand box 1 along the longitudinal direction of the bogie. It should be noted that the sand-spreading arm 2 does not contact the sand box 1, and the sand-spreading arm 2 and the sand box 1 maintain a set distance along the longitudinal direction of the bogie. A certain installation gap is left between the sand-spreading arm 2 and the sand box 1. The sand-spreading hose 3, the wheel rim lubrication hose 4, the wheel rim lubrication hard pipe 15 and the two sand-spreading air supply hard pipes 18 are centrally arranged in the installation gap to ensure that each pipeline is staggered while making full use of the installation gap. A sand-spreading nozzle 21 is provided at the bottom end of the sand-spreading arm 2, and the sand-spreading nozzle 21 is opposite to the track and is used to spray sand onto the track. The fixing method of the sand-spreading nozzle 21 on the sand-spreading arm 2 can refer to the prior art and will not be described in detail here. That is to say, one end of the sand-spreading arm 2 in the present invention is fixed to the bogie, and the other end is provided with a sand-spreading nozzle 21.

[0053] The sanding hose 3 is connected between the bottom of the sand box 1 and the sanding nozzle 21, so that the sand in the sand box 1 flows along the sanding hose 3 to the sanding nozzle 21. The wheel rim lubricating hose 4 is connected between the front side of the sand box 1 and the sanding arm 2, and is used to spray lubricating oil to the bogie. The sanding hose 3 and the wheel rim lubricating hose 4 are both made of flexible materials, such as rubber tubes, so that the two hoses can be bent into an ideal shape at will, ensuring that the two hoses can move and collapse with the swing of the bogie.

[0054] The key is that Figure 2 As shown, along the lateral direction of the bogie (i.e. Figure 2 In the X-axis direction, the sanding hose 3 is located on the inner side of the wheel rim lubrication hose 4; along the vertical direction of the bogie (i.e., the Figure 2 In the Z-axis direction of the wheel rim), the sanding hose 3 is located below the wheel rim lubricating hose 4. For the two groups of functional components, the two sanding hoses 3 are located between the two wheel rim lubricating hoses 4, and the two sanding hoses 3 are both arranged below the two wheel rim lubricating hoses 4. By rationally arranging the sanding hoses 3 and the wheel rim lubricating hoses 4, it is ensured that the two hoses can be completely staggered in space between the sand box 1 and the sanding arm 2. In this way, the swing range of the sanding hose 3 is located below the swing range of the wheel rim lubricating hose 4, and the swing ranges of the two hoses are staggered from each other, so that the sanding hose 3 and the wheel rim lubricating hose 4 form a dynamic combination relationship that does not interfere with each other during the swinging process of the bogie, thereby avoiding friction between the two hoses during the swinging process of the bogie. This arrangement reduces the risk of hose wear failure, extends the service life of the hose, reduces the failure rate, and effectively improves the operating safety of the entire vehicle.

[0055] As a preferred embodiment, as shown in the attached Figure 1 and 2As shown in the figure, considering the symmetrical design of the two sides driven by the bogie, the two groups of functional components are symmetrically arranged with the longitudinal center line of the car body as the reference, that is, the two groups of functional components are mirror-symmetrical structures. This design can ensure that when the bogie swings to the left or rear, one of the two hoses is always in a stretched state and the other is in a compressed state, meeting the steering requirements in different directions. Moreover, along the longitudinal direction of the bogie, on the side close to the front of the car, the distance between the two groups of functional components gradually decreases, which is specifically reflected in that along the longitudinal direction of the bogie (that is, the side Figure 2 In the Y-axis direction in the drawing), the lateral distance between the two sand boxes 1 on the X-axis is greater than the lateral distance between the two sand spraying nozzles 21 on the X-axis, so that the two groups of functional components adopt a narrowed design to form a pointed shape to adapt to the flat installation space at the front end of the vehicle head, reduce the risk of collision between the kinetic energy component and the inner wall of the vehicle head, and help improve the operating safety of the entire vehicle.

[0056] As attached Figure 3 and 4 As shown, a snowplow is fixedly provided at the bottom of the front end of the bogie, and the snowplow is used to clear obstacles on the track. A chain fixing plate 5 is fixedly provided at the bottom of the snowplow, and the chain fixing plate 5 can be fixed by welding or bolting. The chain fixing plate 5 includes an extension portion and a connecting portion connected in an integral manner, and the extension portion extends downward from the bottom of the snowplow along the Z-axis direction, and the connecting portion remains parallel to the track, and the extension portion and the connecting portion are arranged at an angle. Specifically, the angle between the extension portion and the connecting portion is an obtuse angle, but is not limited to this.

[0057] As a preferred embodiment, as shown in the attached Figure 4 As shown, each group of functional components also includes a hose chain 6 hingedly connected to the chain fixing plate 5. The material of the hose chain 6 can be a steel wire rope, but is not limited thereto. Specifically, a hanging ear is fixed at the bottom of the connection portion of the chain fixing plate 5, and the hanging ear is fixed by welding and extends downward along the Z axis. A flexible collar is formed at the end of the hose chain 6, and the flexible collar is sleeved on the hinge shaft of the hanging ear, so that a rotatable connection is formed between the hose chain 6 and the chain fixing plate 5, so that the hose chain 6 can swing freely relative to the chain fixing plate 5.

[0058] As attached Figures 1 to 3 As shown, in the lateral direction of the bogie, the sanding hose 3 is located on the outside of the chain fixing plate 5, so that the sanding hose 3 is bent and raised in the direction away from the inner side wall of the vehicle head under the action of the hose chain 6, thereby avoiding friction between the sanding hose 3 and the inner side wall of the vehicle head. In addition, the two ends of the hose chain 6 are rotatably connected, and combined with the material characteristics of the hose chain 6 itself, the sanding hose 3 can be stably maintained in an ideal shape under the action of the hose chain 6, while not affecting the sanding hose 3 to meet the swing requirements of the bogie.

[0059] The middle section of the sand spreading hose 3 is fixed with an anti-drop pipe clamp 7, as shown in the attached Figures 4 to 7As shown, one end of the hose chain 6 away from the chain fixing plate 5 is hingedly connected to the anti-drop pipe clamp 7 to prevent the sand-spreading hose 3 from being loosened, ensure that the sand-spreading hose 3 is reliably fixed, and enable the sand-spreading hose 3 to meet the swinging requirements of the bogie. Specifically, a fastening bolt is passed through the end of the anti-drop pipe clamp 7, and the flexible collar formed at the end of the hose chain 6 is directly sleeved on the fastening bolt, so that the hose chain 6 and the anti-drop pipe clamp 7 are rotatably connected, ensuring that the hose chain 6 can swing freely relative to the anti-drop pipe clamp 7.

[0060] The hose chain 6 is connected to the sand-spreading hose 3 in the transverse direction of the bogie so that the sand-spreading hose 3 is bent into a C-shape or an S-shape. Figures 1 to 3 As shown, the length of the sanding hose 3 can be made greater than its minimum bending radius without being collapsed, the sanding hose 3 can meet the swinging requirement of the bogie, and the sanding hose 3 can avoid the sanding hose 3 and the inner side wall of the front of the vehicle and the wheel rim lubrication hose 4.

[0061] As a preferred embodiment, the anti-drop pipe clamp 7 is a double pipe clamp, as shown in the attached Figure 1 and 7 As shown, the sanding hose 3 and the heating cable 8 share a pipe clamp, so that the sanding hose 3 and the heating cable 8 are kept in an approximately parallel state, providing a solution for simultaneously fixing and swinging the sanding hose 3 and the heating cable 8, which can avoid potential interference between the sanding hose 3 and the heating cable 8, and can also avoid the sanding hose 3 and the heating cable 8 being pulled by the hose hanging chain 6 during the swinging process of the bogie. In addition, this double pipe clamp design can also keep the sanding hose 3 and the heating cable 8 in an upper and lower distribution with the wheel rim in space, ensuring that the dynamic range of the sanding hose 3 and the heating cable 8 is located below the wheel rim lubrication hose 4 to avoid interference.

[0062] Specifically, as attached Figure 7 As shown, the anti-dropping pipe clamp 7 has two independent clamping sleeves 71, one of which is fixedly sleeved on the outer periphery of the sanding hose 3, and the other is fixedly sleeved on the outer periphery of the heating cable 8. It should be noted that the two clamping sleeves 71 are respectively sleeved on the middle sections of the sanding hose 3 and the heating cable 8. Fastening clamps are respectively provided on both sides of the two clamping sleeves 71, and the two fastening clamps are fixedly connected by fastening bolts, which are used to clamp and fix the two clamping sleeves 71, so that the two clamping sleeves 71 are respectively fixed on the outer peripheries of the sanding hose 3 and the heating cable 8.

[0063] As attached Figure 6 As shown, the straight-line distance between the end of the sand-spreading hose 3 connected to the sand-spreading nozzle 21 and the anti-dropping pipe clamp 7 is the set length L, and the range of the set length L is 300 mm to 450 mm, so that the sand-spreading hose 3 maintains an ideal bending arc and avoids the sand-spreading hose 3 from being collapsed during the swinging process of the bogie. The optimal size of the set length L is 360 mm.

[0064] As a preferred embodiment, as shown in the attached Figures 4 to 6 As shown, a sand sprinkling joint 9 is fixedly provided at the bottom of the sand box 1, which is used to connect the sand sprinkling hose 3 and the sand sprinkling air supply hard pipe 18. A sand sprinkling joint 10 is fixedly provided at the sand sprinkling joint 9's sand outlet, and a transition joint 11 is fixedly provided at the sand sprinkling nozzle 21. The sand sprinkling joint 10 and the first end of the sand sprinkling hose 3 and the transition joint 11 and the second end of the sand sprinkling hose 3 are connected to form an S-shaped structure. By changing the bending direction of the sand sprinkling joint 10 and the transition joint 11, the sand sprinkling hose 3 can be bent into a C-shape or an S-shape between the sand sprinkling joint 10 and the transition joint 11, so as to avoid the sand sprinkling hose 3 from generating a torsional force when the bogie swings, and ensure that the two ends of the sand sprinkling hose 3 are smoothly connected with the two joints, respectively, to prevent the sand sprinkling hose 3 from being folded.

[0065] As attached Figure 6 As shown, along the vertical direction of the bogie, the sand outlet joint 10 is arranged higher than the transition joint 11, so that the sand in the sand spreading hose 3 flows to the sand spreading nozzle 21 by gravity, ensuring that the sand is smoothly discharged from the sand spreading hose 3.

[0066] As a preferred embodiment, as shown in the attached Figure 5 As shown, a reference plane is formed at the bottom of the sand spreading joint 9; along the vertical direction of the bogie, the center line of one end of the sand outlet joint 10 connected to the sand spreading hose 3 is set at a set angle a with the reference plane, so as to avoid the bogie swinging to generate circumferential torsional force on the sand spreading hose 3 and to avoid affecting the sealing of the buckled parts at both ends of the sand spreading hose 3 due to the bogie swing.

[0067] As a preferred embodiment, as shown in the attached Figure 1 , 2 , 3 and 9, each group of functional components also includes a rim lubrication pipe fixing seat 12 arranged on the side of the sand box 1 facing the sand spreading arm 2, the rim lubrication pipe fixing seat 12 is penetrated and fixed with a partition joint 13, the sand spreading arm 2 is fixedly provided with a hinge support 22 on the side facing the sand box 1, the hinge support 22 is hinged with a rotating joint 14, and the rim lubrication hose 4 is spirally connected between the partition joint 13 and the rotating joint 14, so that the end of the rim lubrication hose 4 and the rim lubrication pipe fixing seat 12 maintain a set torsional force to offset the end of the rim lubrication hose 4 connected to the sand spreading arm 2 with the steering The instantaneous torsional force generated when the bogie swings can offset the circumferential torsional force generated on the rim lubricating hose 4 itself during the bogie swinging process, thereby preventing the rim lubricating hose 4 from generating circumferential torsional force on the joints at both ends when the bogie swings, thereby avoiding the risk of the joints at both ends of the rim lubricating hose 4 being loosened due to the circumferential torsional force, and ensuring that the rim lubricating hose 4 meets the length requirement under the dynamic swinging of the bogie, so that the length of the rim lubricating hose 4 is greater than its minimum bending radius without being collapsed, and also solving the problem that the connection end of the existing rim lubricating hose 4 cannot be fixed.

[0068] As a preferred embodiment, as shown in the attachedFigure 8 and 9 As shown, each set of functional components further includes a wheel flange lubrication hard pipe 15. The wheel flange lubrication hard pipe 15 and the wheel flange lubrication flexible pipe 4 are respectively fixedly connected to both ends of the partition joint 13, which can not only provide reliable support for both the wheel flange lubrication hard pipe 15 and the wheel flange lubrication flexible pipe 4, but also make the wheel flange lubrication hard pipe 15 and the wheel flange lubrication flexible pipe 4 as close as possible to the front side of the sand box 1, providing relatively sufficient space for the swing of the wheel flange lubrication flexible pipe 4 and avoiding interference.

[0069] As shown in the appendix Figure 9 As shown, along the transverse direction of the bogie, the wheel flange lubrication hard pipe 15 is located above the wheel flange lubrication flexible pipe 4, avoiding interference between the wheel flange lubrication flexible pipe 4 and the wheel flange lubrication hard pipe 15 during the swing of the bogie and causing wear of the wheel flange lubrication flexible pipe 4, which is beneficial to extending the service life of the wheel flange lubrication flexible pipe 4.

[0070] As shown in the appendix Figure 8 As shown, the wheel flange lubrication pipe fixing seat 12 is bent with an inclined flanging 121, and the partition joint 13 vertically penetrates through the inclined flanging 121 so that the center line of the partition joint 13 forms a preset angle with the front side of the sand box 1. The range of the preset angle is 25° to 40°, enabling the wheel flange lubrication flexible pipe 4 to avoid the inner wall of the locomotive head and the sand spraying hose 3 to meet the swing requirements of the bogie. The optimal value of the preset angle is 30°.

[0071] As a preferred embodiment, as shown in the appendix Figure 9 As shown, the wheel flange lubrication pipe fixing seat 12 and the sand spraying air supply pipe fixing seat 19 are both centrally slidably arranged on one side of the sand box 1 facing the sand spraying arm 2, which is not only convenient for disassembly and assembly, but also can flexibly adjust the positions of the wheel flange lubrication flexible pipe 4 and the sand spraying air supply hard pipe 18. By adjusting the wheel flange lubrication pipe fixing seat 12, the circumferential torsional force of the joints at both ends of the wheel flange lubrication flexible pipe 4 is adjusted to change the shape of the wheel flange lubrication flexible pipe 4, and the assembly error between the sand spraying air supply hard pipe 18 and the sand box 1 can also be compensated. Of course, the wheel flange lubrication pipe fixing seat 12 and the sand spraying air supply pipe fixing seat 19 can also be directly welded and fixed on one side of the sand box 1 facing the sand spraying arm 2.

[0072] Specifically, as shown in the appendix Figure 9As shown in the figure, an adjustment chute 16 is formed on one side of the sand box 1 facing the sand spraying arm 2. The wheel flange lubrication pipe fixing seat 12 is slidably arranged in the adjustment chute 16; a first locking bolt 17 is passed through the wheel flange lubrication pipe fixing seat 12 and abuts against the adjustment chute 16; when the position of the wheel flange lubrication pipe fixing seat 12 needs to be adjusted, the first locking bolt 17 is loosened; when the wheel flange lubrication pipe fixing seat 12 is adjusted to the ideal position, the first locking bolt 17 is tightened to restrict the relative movement of the wheel flange lubrication pipe fixing seat 12 with respect to the sand box 1, ensuring that the wheel flange lubrication pipe fixing seat 12 is reliably fixed on the sand box 1. A T-shaped slider can be added to the tail end of the first locking bolt 17, and the adjustment chute 16 correspondingly is a T-shaped chute that cooperates with the T-shaped slider, so that the T-shaped chute guides the wheel flange lubrication pipe fixing seat 12 to move linearly along the transverse direction of the bogie; when the T-shaped slider is tightly pressed in the T-shaped chute, the wheel flange lubrication pipe fixing seat 12 stops moving.

[0073] As shown in the attachment Figure 9 As shown in the figure, each group of functional components further includes a sand spraying air supply rigid pipe 18 connected to the sand spraying joint 9 and a sand spraying air supply pipe fixing seat 19 connected to the sand spraying air supply rigid pipe 18. The sand spraying air supply pipe fixing seat 19 is slidably arranged in the adjustment chute 16; the sand spraying air supply pipe fixing seat 19 is provided with a second locking bolt 20 that abuts against the adjustment chute 16. When the position of the sand spraying air supply pipe fixing seat 19 needs to be adjusted, the second locking bolt 20 is loosened; when the sand spraying air supply pipe fixing seat 19 is adjusted to the ideal position, the second locking bolt 20 is tightened to restrict the relative movement of the sand spraying air supply pipe fixing seat 19 with respect to the sand box 1, ensuring that the sand spraying air supply pipe fixing seat 19 is reliably fixed on the sand box 1. The structure of the second locking bolt 20 is the same as that of the first locking bolt 17, and will not be elaborated here.

[0074] As a preferred embodiment, as shown in the attachment Figure 9 As shown in the figure, two sand spraying air supply rigid pipes 18 are fixedly arranged side by side on the sand spraying air supply pipe fixing seat 19. Along the transverse direction of the bogie, the wheel flange lubrication pipe fixing seat 12 is located outside the sand spraying air supply pipe fixing seat 19. In this way, the wheel flange lubrication rigid pipe 15 is located outside the two sand spraying air supply rigid pipes 18, enabling the effective arrangement of the three rigid pipes, avoiding mutual interference, and providing sufficient space for the swing of the wheel flange lubrication hose 4. The wheel flange lubrication rigid pipe 15 and the sand spraying air supply rigid pipe 18 can both be steel pipes, but are not limited thereto.

[0075] As shown in the attachment Figure 9 As shown in the figure, along the transverse direction of the bogie, the sand spraying air supply rigid pipe 18 is located between the sand spraying hose 3 and the wheel flange lubrication hose 4; along the vertical direction of the bogie, the sand spraying air supply rigid pipe 18 is arranged higher than the sand spraying hose 3; this design enables the swings of the wheel flange lubrication hose 4 and the sand spraying hose 3 to form a dynamic combination relationship without mutual interference, ensuring that the dynamic range of the wheel flange lubrication hose 4 is located above the dynamic range of the sand spraying hose 3, enabling the two hoses to meet the swing requirements of the steering angle.

[0076] The present invention also provides a rail transit vehicle, including the above-mentioned headstock assembly. By optimizing the layout of the components of the headstock assembly, the risk of the sanding hose 3 and the flange lubrication hose 4 being staggered with each other is avoided, and the risk of hose wear and failure is reduced, effectively improving the running safety of the whole vehicle.

[0077] It should be noted that in this specification, relational terms such as first and second are only used to distinguish one entity from several other entities, and do not necessarily require or imply any actual relationship or order between these entities.

[0078] Specific examples are used in this article to elaborate on the principles and implementation manners of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims

1. A vehicle head assembly, characterized in that: The invention comprises two groups of functional components distributed along the transverse direction of the bogie; each group of the functional components comprises: Sand box (1); A sand spreading arm (2) located at the front side of the sand box (1) along the longitudinal direction of the bogie and provided with a sand spreading nozzle (21) at the bottom end; A sand spreading hose (3) connected between the bottom of the sand box (1) and the sand spreading nozzle (21); A wheel rim lubrication hose (4) connected between the front side of the sand box (1) and the sand spreading arm (2); In the transverse direction of the bogie, the sand spreading hose (3) is located on the inner side of the wheel rim lubrication hose (4); In the vertical direction of the bogie, the sand spreading hose (3) is located below the wheel rim lubrication hose (4).

2. The vehicle head assembly according to claim 1, characterized in that: The two groups of functional components are symmetrically arranged with the longitudinal center line of the vehicle body as a reference; along the longitudinal direction of the bogie, on the side close to the front of the vehicle, the distance between the two groups of functional components gradually decreases.

3. The vehicle head assembly according to claim 1, characterized in that: Each group of the functional components further comprises a hose chain (6) hingedly connected to a chain fixing plate (5) provided on the obstacle remover; in the transverse direction of the bogie, the sand spreading hose (3) is located on the outer side of the chain fixing plate (5); The middle section of the sand spreading hose (3) is fixedly sleeved with an anti-dropping pipe clamp (7), and one end of the hose hanging chain (6) away from the hanging chain fixing plate (5) is hingedly connected to the anti-dropping pipe clamp (7), and the hose hanging chain (6) is connected to the sand spreading hose (3) in the transverse direction of the bogie so that the sand spreading hose (3) is bent into a C shape or an S shape.

4. The vehicle head assembly according to claim 3, characterized in that: The anti-dropping pipe clamp (7) has two mutually independent clamping sleeves (71), wherein one of the clamping sleeves (71) is fixedly sleeved on the outer circumference of the sand spreading hose (3), and the other of the clamping sleeves (71) is fixedly sleeved on the outer circumference of the heating cable (8); The straight-line distance between the end of the sand-spreading hose (3) connected to the sand-spreading nozzle (21) and the anti-dropping pipe clamp (7) is a set length, and the range of the set length is 300 mm to 450 mm.

5. The vehicle head assembly according to claim 1, characterized in that: A sand spreading joint (9) is fixedly provided at the bottom of the sand box (1), a sand outlet of the sand spreading joint (9) is fixedly provided with a sand outlet joint (10), a transition joint (11) is fixedly provided at the sand spreading nozzle (21), and the sand outlet joint (10) and the first end of the sand spreading hose (3) and the transition joint (11) and the second end of the sand spreading hose (3) are connected to form an S-shaped structure; Along the vertical direction of the bogie, the sand discharge joint (10) is arranged higher than the transition joint (11).

6. The vehicle head assembly according to claim 5, characterized in that: A reference plane is formed at the bottom of the sand spreading joint (9); along the vertical direction of the bogie, the center line of one end of the sand outlet joint (10) connected to the sand spreading hose (3) is arranged at a set angle with the reference plane.

7. The vehicle head assembly according to claim 5, characterized in that: Each group of functional components further comprises a wheel rim lubrication pipe fixing seat (12) arranged on the side of the sand box (1) facing the sand spreading arm (2), a partition joint (13) being passed through and fixed to the wheel rim lubrication pipe fixing seat (12), a hinge support (22) being fixedly arranged on the side of the sand spreading arm (2) facing the sand box (1), a swivel joint (14) being hingedly connected to the hinge support (22), and the wheel rim lubrication hose (4) being spirally connected between the partition joint (13) and the swivel joint (14).

8. The vehicle head assembly according to claim 7, characterized in that: Each group of the functional components further comprises a wheel rim lubricating hard pipe (15), wherein the wheel rim lubricating hard pipe (15) and the wheel rim lubricating hose (4) are respectively fixedly connected to two ends of the partition plate joint (13); In the transverse direction of the bogie, the wheel rim lubrication hard pipe (15) is located above the wheel rim lubrication hose (4); The wheel rim lubrication pipe fixing seat (12) is bent to form an inclined flange (121), and the partition joint (13) is vertically penetrated through the inclined flange (121) so that a center line of the partition joint (13) and the front side surface of the sand box (1) form a preset angle, and the range of the preset angle is 25° to 40°.

9. The vehicle head assembly according to claim 8, characterized in that: An adjusting slot (16) is formed on one side of the sand box (1) facing the sand spreading arm (2), and the wheel rim lubrication tube fixing seat (12) can be slidably arranged in the adjusting slot (16); a first locking bolt (17) abutting against the adjusting slot (16) is passed through the wheel rim lubrication tube fixing seat (12); Each group of the functional components further comprises a sand-sprinkling air supply rigid pipe (18) connected to the sand-sprinkling air supply rigid pipe (9) and a sand-sprinkling air supply pipe fixing seat (19) connected to the sand-sprinkling air supply rigid pipe (18); the sand-sprinkling air supply pipe fixing seat (19) can be slidably arranged on the adjustment slide groove (16); the sand-sprinkling air supply pipe fixing seat (19) is provided with a second locking bolt (20) which abuts against the adjustment slide groove (16).

10. The vehicle head assembly according to claim 9, characterized in that: In the transverse direction of the bogie, the wheel rim lubrication pipe fixing seat (12) is located outside the sand spreading air supply pipe fixing seat (19); Along the transverse direction of the bogie, the sand-spreading air supply hard pipe (18) is located between the sand-spreading hose (3) and the wheel rim lubrication hose (4); Along the vertical direction of the bogie, the sand-spreading air supply hard pipe (18) is arranged higher than the sand-spreading hose (3).

11. A rail transit vehicle, characterized in that: The vehicle head assembly comprises any one of claims 1 to 10.

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