Rail web polishing device used along railway

Abstract

The invention belongs to the technical field of rail polishing devices, and particularly relates to a rail web polishing device used along a railway, the rail web polishing device comprises a walking rack and two polishing mechanisms located at the bottom of the walking rack, each polishing mechanism comprises a polishing motor and a profiling grinding wheel, the polishing motors drive the profiling grinding wheels to rotate, and a frame body is arranged at the bottom of the walking rack; a U-shaped plate is slidably connected into the frame body, a rotating shaft is rotatably connected into the U-shaped plate, an L-shaped plate is fixedly connected to the surface of the rotating shaft, the L-shaped plate is fixedly connected with the grinding motor, two gears are fixedly connected to the surface of the rotating shaft, and racks meshed with the gears are fixedly connected into the frame body. The technical means that the gear and the rack are matched is adopted, sliding of the U-shaped plate along the frame body is converted into rotation of the rotating shaft, the L-shaped plate and the grinding motor are driven to deflect through rotation of the rotating shaft, the inclination angle of the profiling grinding wheel can be adjusted in a self-adaptive mode along with the height of the protrusion on the surface of the rail web, and then the contact area of the profiling grinding wheel and the protrusion is effectively increased; and sufficient polishing is ensured.

Description

Technical Field

[0001] This invention belongs to the technical field of rail grinding devices, specifically a rail web grinding device for use along railway lines. Background Technology

[0002] The environmental monitoring work along railway lines first integrates and fuses satellite remote sensing data from different sources, time phases, and frequency bands to accurately extract key environmental information such as topography, building distribution, and water body extent along the railway lines. Then, using professional image processing and classification techniques, regular dynamic tracking and monitoring of the railway line environment is conducted. This monitoring process allows for the timely detection of defects such as wear and cracks in the rail web. Once defects are detected, grinding equipment can be quickly deployed to target and repair the defective areas of the rail web, thereby ensuring the safe and stable operation of the railway line.

[0003] Patent application CN120250415A discloses a double-sided grinding machine for railway rail webs. The machine includes a frame assembly, which comprises a frame and a universal elastic grinding assembly. The universal elastic grinding assembly includes symmetrical grinding wheel support arms, the rear ends of which are rotatably connected to the frame. The front ends of the symmetrical grinding wheel support arms are respectively connected to a drive shaft via bearings. Each of the symmetrical drive shafts is connected to a set of steel balls. The universal elastic grinding assembly also includes symmetrical contour grinding wheels, with connecting sleeves fixedly installed in the long countersunk holes of the symmetrical contour grinding wheels. This double-sided grinding machine for railway rail webs is suitable for rails of various specifications ranging from 50kg / m to 75kg / m. It can automatically grind and remove rust from the rail webs, and features high grinding efficiency, safety, reliability, convenient operation, quick installation on tracks, and high grinding precision.

[0004] The aforementioned patent document describes a universal elastic grinding component that allows the contour grinding wheel to adapt to the rail web for uniform grinding. However, in actual railway maintenance, the rail web surface can develop raised areas with significant height differences due to long-term train load compression, metal fatigue deformation, or uneven local wear. When the height of the raised areas exceeds the adaptive range of the elastic component, the component struggles to drive the contour grinding wheel to fully conform to the raised surface, only achieving localized contact. This ultimately results in uneven grinding of the rail web at the raised areas. Summary of the Invention

[0005] The purpose of this invention is to provide a rail web grinding device for railway lines, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a rail web grinding device for railway lines, comprising a traveling frame and two grinding mechanisms located at its bottom, each grinding mechanism comprising a grinding motor and a profile grinding wheel, the grinding motor driving the profile grinding wheel to rotate, a frame body being provided at the bottom of the traveling frame, a U-shaped plate being slidably connected within the frame body, a rotating shaft being rotatably connected within the U-shaped plate, an L-shaped plate being fixedly connected to the surface of the rotating shaft, the L-shaped plate being fixedly connected to the grinding motor, two gears being fixedly connected to the surface of the rotating shaft, and a rack meshing with the gears being fixedly connected within the frame body, when the profile grinding wheel contacts the rail web protrusion, it pushes the U-shaped plate to slide, the gears move synchronously with the U-shaped plate, and the gears rotate the rotating shaft through meshing with the rack, thereby driving the grinding motor to move synchronously through the L-shaped plate; The frame is slidably connected to the bottom of the traveling frame.

[0007] Preferably, two electric actuators are fixedly connected to the top of the walking frame, and the output end of the electric actuators is fixedly connected to the frame body.

[0008] Preferably, mounting blocks are fixedly connected to both sides of the U-shaped plate, and the inner wall of the frame is provided with mounting grooves for the mounting blocks to slide.

[0009] Preferably, a secondary spring is fixedly connected to the inner wall of the mounting groove, and the end of the secondary spring away from the inner wall of the mounting groove is fixedly connected to the mounting block.

[0010] Preferably, a trigger switch that mates with the mounting block is installed on the inner wall of the mounting groove. The trigger switch is electrically connected to the electric push rod. The trigger switch contacts the mounting block and sends an electrical signal to the corresponding electric push rod.

[0011] Preferably, the output end of the grinding motor is equipped with a rotating shaft, the bottom of the rotating shaft is provided with an annular boss, and a number of steel balls are fixedly connected to the outer wall of the annular boss. A settling groove is opened in the profile grinding wheel, and a connecting sleeve is fixedly connected in the settling groove. A through groove that mates with the rotating shaft is opened in the connecting sleeve, and a mating groove that mates with the steel balls is provided in the connecting sleeve. An inverted T-shaped locking nut is installed in the threaded hole at the bottom of the profile grinding wheel, and an installation shaft is installed in the inverted T-shaped locking nut. A primary spring is fixedly connected between the installation shaft and the rotating shaft.

[0012] Preferably, each of the mating grooves includes a semi-cylindrical hole and a hemispherical hole, the semi-cylindrical hole and the hemispherical hole are connected, and the steel ball is located in the area formed by the corresponding semi-cylindrical hole and the hemispherical hole.

[0013] Preferably, an arc-shaped rod is fixedly connected to the bottom end of the rotating shaft.

[0014] The beneficial effects of this invention are as follows: 1. This invention uses a gear and rack combination to convert the sliding of the U-shaped plate along the frame into the rotation of the rotating shaft. The rotation of the rotating shaft drives the L-shaped plate and the grinding motor to deflect, so that the tilt angle of the profile grinding wheel can be adaptively adjusted according to the height of the protrusion on the rail web surface, thereby effectively increasing the contact area between the profile grinding wheel and the protrusion and ensuring thorough grinding.

[0015] 2. This invention employs a combination of a trigger switch and an electric actuator. When the height of the protrusion on the rail web surface exceeds the limit, the contour grinding wheel will push the U-shaped plate to move laterally until it contacts the trigger switch. At this time, the trigger switch will send a signal to the electric actuator, which will drive the entire grinding mechanism to avoid the protrusion. This avoidance by the grinding mechanism helps to extend its service life and thus better meet actual usage requirements.

[0016] 3. This invention employs a technical means that combines a U-shaped plate, a mounting block, and a mounting groove. The cooperation between the mounting block and the mounting groove helps to ensure the stability of the U-shaped plate during sliding, and the secondary spring provides a restoring force for the U-shaped plate. When the contour grinding wheel disengages from the protrusion, the secondary spring contracts to drive the U-shaped plate to return to its original position, thus facilitating the subsequent use of the equipment. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a structural schematic diagram of the frame and its auxiliary structures of the present invention; Figure 3 This is a cross-sectional view of the internal structure of the frame of the present invention; Figure 4 This is a side view of the internal structure of the frame of the present invention; Figure 5 This is a cross-sectional view of the frame and the internal structure of the contour grinding wheel of the present invention; Figure 6 For the present invention Figure 5 The enlarged view at point A is shown below; Figure 7 This is a cross-sectional view of the internal structure of the contour grinding wheel of the present invention.

[0018] In the picture: 1. Walking frame; 2. Electric actuator; 3. Frame; 31. Mounting slot; 32. Mounting block; 33. Secondary spring; 34. U-shaped plate; 35. Rotating shaft; 36. L-shaped plate; 37. Grinding motor; 38. Rotating shaft; 39. Contouring grinding wheel; 310. Settling tank; 311. Steel ball; 312. Connecting sleeve; 313. Mating groove; 314. Primary spring; 315. Arc rod; 316. T-shaped lock nut; 317. Mounting shaft; 4. Gears; 5. Gear rack; 6. Trigger switch. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] like Figures 1 to 7 As shown, this embodiment of the invention provides a rail web grinding device for railway lines, including a traveling frame 1. The main working components of the traveling frame 1 for traveling and the specific working principle are all existing technologies, and will not be described in detail here.

[0021] Two grinding mechanisms are symmetrically arranged at the bottom of the walking frame 1. Each grinding mechanism includes a grinding motor 37 located at the bottom of the walking frame 1. The output end of the grinding motor 37 is connected to a rotating shaft 38 via a flexible coupling. The bottom of the rotating shaft 38 is provided with an annular boss. Several steel balls 311 are fixedly connected to the outer wall of the annular boss. The steel balls 311 are evenly distributed in a ring array on the outer wall of the annular boss of the rotating shaft 38. A contour grinding wheel 39 is provided on the outer side of the rotating shaft 38. A settling groove 310 is opened from top to bottom in the contour grinding wheel 39. A connecting sleeve 312 is fixedly connected in the settling groove 310. A through groove adapted to the rotating shaft 38 is opened in the connecting sleeve 312. A mating groove 313 is provided in the connecting sleeve 312 to mate with the steel balls 311. Each mating groove 313 includes a semi-cylindrical hole and a hemispherical hole, which are connected. The steel balls 311 are mated together. Within the area formed by the corresponding semi-cylindrical hole and hemispherical hole, the bottom of the profile grinding wheel 39 is provided with a threaded hole. An inverted T-shaped locking nut 316 is installed in the threaded hole of the profile grinding wheel 39. An installation shaft 317 is installed in the middle of the inverted T-shaped locking nut 316. A primary spring 314 is fixedly connected between the installation shaft 317 and the rotating shaft 38. The top end of the installation shaft 317 is connected to the rotating shaft 38 through the primary spring 314. The bottom end of the installation shaft 317 is locked by the inverted T-shaped locking nut 316, thereby fixing the connecting sleeve 312, the profile grinding wheel 39 and the installation shaft 317 into a whole. When the grinding motor 37 drives the rotating shaft 38 to rotate, the steel ball 311 will rotate the connecting sleeve 312 and the profile grinding wheel 39. At the same time, the structure of the steel ball 311 and the mating groove 313 allows the profile grinding wheel 39 to swing flexibly to adapt to the rail web, and the primary spring 314 can also provide elastic restoring force.

[0022] Furthermore, the grinding mechanism achieves flexible transmission between the grinding motor 37 and the rotating shaft 38 through a flexible coupling. The steel ball 311 of the annular boss at the bottom of the rotating shaft 38 is embedded in the corresponding mating groove 313 in the inner connecting sleeve 312 of the contour grinding wheel 39. This allows the equipment to drive the contour grinding wheel 39 to rotate synchronously under the drive of the grinding motor 37 through the transmission between the steel ball 311 and the semi-cylindrical hole. At the same time, the hemispherical hole provides the contour grinding wheel 39 with a degree of freedom to swing flexibly to adapt to the undulations of the rail surface. Meanwhile, the mounting shaft 317 forms an integral part with the contour grinding wheel 39 and the connecting sleeve 312 through the inverted T-shaped locking nut 316. This allows the first-stage spring 314 to provide axial elastic preload to ensure that the steel ball 311 and the mating groove 313 fit tightly together, and to provide a restoring force after contouring swing.

[0023] An arc-shaped rod 315 is fixedly connected to the bottom of the annular boss at the end of the rotating shaft 38. The arc-shaped rod 315 is designed to prevent the primary spring 314 from being over-compressed, thereby extending the service life of the primary spring 314.

[0024] Furthermore, the arc-shaped rod 315 is fixed to the bottom of the annular boss on the rotating shaft 38. When the primary spring 314 is compressed by axial force, the arc-shaped rod 315 moves downward synchronously with the rotating shaft 38 until the bottom end of the arc-shaped rod 315 contacts the mounting shaft 317, forming a rigid limit. At this time, the compression of the primary spring 314 is strictly limited by the length of the arc-shaped rod 315, preventing further compression. This avoids elastic fatigue and deformation failure of the primary spring 314 due to over-compression. This structure directly constrains the maximum compression of the spring through mechanical hard limiting, which is more reliable than relying solely on the elastic strength of the spring itself. It can effectively reduce the damage to the primary spring 314 caused by long-term over-compression, thereby extending its service life. The length of the arc-shaped rod 315 is slightly greater than the safe maximum compression of the primary spring 314, thus ensuring that it can both play a limiting role and not affect the elastic expansion and contraction within the normal working range of the spring.

[0025] The bottom of the walking frame 1 is provided with a transverse movement component that adaptively adjusts the angle of the profile grinding wheel 39 according to the height of the protrusion. The transverse movement component includes a frame 3 symmetrically arranged at the bottom of the walking frame 1. A U-shaped plate 34 is slidably connected between the two inner side walls of the frame 3. A rotating shaft 35 is rotatably connected between the two inner side walls of the U-shaped plate 34. An L-shaped plate 36 is fixedly connected to the surface of the rotating shaft 35. The L-shaped plate 36 is fixedly connected to the grinding motor 37. Gears 4 are fixedly connected to the surface of the rotating shaft 35 and on both sides of the L-shaped plate 36. A rack 5 that meshes with the gear 4 is fixedly connected between the two inner side walls of the frame 3. A strip-shaped through hole for the rotating shaft 38 to deflect is opened through the bottom of the frame 3.

[0026] Furthermore, the transverse component, through the meshing transmission of gear 4 and rack 5, converts the sliding of U-shaped plate 34 along frame 3 into the rotation of rotating shaft 35. The rotation of rotating shaft 35 drives L-shaped plate 36 and grinding motor 37 to deflect, so that the tilt angle of profile grinding wheel 39 can be adaptively adjusted according to the height of the protrusion on the rail web surface. This effectively increases the contact area between profile grinding wheel 39 and the protrusion, ensuring more thorough and efficient grinding, and significantly improving the grinding effect on the protruding parts of the rail web.

[0027] Mounting blocks 32 are fixedly connected to both sides of the U-shaped plate 34. The inner wall of the frame 3 is provided with mounting grooves 31 for the mounting blocks 32 to slide. A secondary spring 33 is fixedly connected to one side of the inner wall of the mounting groove 31. The side of the secondary spring 33 away from the inner wall of the mounting groove 31 is fixedly connected to the mounting block 32. The cooperation between the mounting block 32 and the mounting groove 31 helps to ensure the stability of the U-shaped plate 34 when sliding. The secondary spring 33 provides a restoring force for the U-shaped plate 34. When the contour grinding wheel 39 disengages from the protrusion, the secondary spring 33 contracts to drive the U-shaped plate 34 to return to its original position.

[0028] Furthermore, the elastic force of the secondary spring 33 can automatically extend and retract according to the height of the protrusion on the rail web surface: when the protrusion is small, the compression of the secondary spring 33 is small, and the U-shaped plate 34 is squeezed by the protrusion and slides slightly. This sliding drives the contour grinding wheel 39 to finely adjust its tilt angle, ensuring that the contour grinding wheel 39 is in close contact with the protruding surface, improving the grinding effect. After the protrusion disappears, the elastic force of the secondary spring 33 drives the U-shaped plate 34 to return to its original position, ensuring that the grinding wheel grinds the flat area normally without relying on gravity, making the reset more reliable. When the protrusion is large, the compression of the secondary spring 33 increases accordingly, and the sliding distance of the U-shaped plate 34 also increases accordingly. The tilt angle of the contour grinding wheel 39 also increases accordingly, thereby increasing the contact area between the contour grinding wheel 39 and the protrusion, thus facilitating better grinding. After the protrusion disappears, the U-shaped plate 34 automatically returns to its original position under the action of the spring, allowing the contour grinding wheel 39 to quickly return to its initial state without affecting the continuity of subsequent grinding operations.

[0029] A trigger switch 6 is installed on the other side of the inner wall of the mounting slot 31. Two electric push rods 2 are fixedly connected to the top of the walking frame 1. The output end of the electric push rod 2 is fixedly connected to the frame 3. The trigger switch 6 is electrically connected to the electric push rod 2. When the protrusion height of the rail web surface is large, the contour grinding wheel 39 will push the U-shaped plate 34 to the limit position (i.e., the position where the mounting block 32 contacts the trigger switch 6). At this time, the trigger switch 6 will send a signal to the electric push rod 2, and drive the entire grinding mechanism to avoid it through the electric push rod 2. The grinding mechanism avoids the movement, which helps to extend its service life and thus better meet the actual use requirements.

[0030] Furthermore, the initial distance between the trigger switch 6 and the mounting block 32 is slightly greater than the maximum safe lateral movement distance of the U-shaped plate 34, which makes it easier to ensure that the timing of the start of the electric push rod 2 can meet the actual use requirements. When the electric push rod 2 drives the frame 3 to move, the electric push rod 2 and the traveling frame 1 move in coordination in terms of speed and direction, thereby avoiding the grinding trajectory deviation caused by the superposition of the movement of the frame 3 and the movement of the traveling frame 1.

[0031] Working principle: After a comprehensive inspection of all components of the equipment, and if no errors are found, the distance between the two grinding mechanisms is adaptively adjusted according to the size and specifications of the track by two electric push rods 2. After adjustment, the grinding motor 37 drives the profile grinding wheel 39 to rotate through the rotating shaft 38. The profile grinding wheel 39 maintains a horizontal posture under the action of the steel ball 311, the first-stage spring 314, etc., and moves synchronously with the traveling frame 1, which facilitates the grinding of the workpiece surface. The elastic force of the first-stage spring 314 makes it easy for the profile grinding wheel 39 to fit against the surface of the track, which is convenient for grinding.

[0032] When the profile grinding wheel 39 travels with the traveling frame 1 to the protrusion on the rail web surface, if the elastic force of the primary spring 314 is insufficient to accommodate the protrusion, the arc-shaped rod 315 prevents the primary spring 314 from being over-compressed. At this time, the profile grinding wheel 39 will be subjected to the reverse thrust of the protrusion. The reverse thrust of the profile grinding wheel 39 varies depending on the height of the protrusion. This thrust can overcome the initial elastic force of the secondary spring 33, thereby pushing the U-shaped plate 34 to slide away from the protrusion along the mounting groove 31 of the frame 3. When the U-shaped plate 34 slides, the gear 4 on its inner rotating shaft 35 moves synchronously with the U-shaped plate 34. Because the gear 4 meshes with the rack 5 fixedly connected inside the frame 3, the meshing action of the two drives the rotating shaft 35 and the L-shaped plate 36 to rotate synchronously. The rotation of the L-shaped plate 36 causes the grinding motor 37 to deflect, and the grinding motor 37 drives the profile grinding wheel 39 to change its angle, thereby increasing the contact area between the profile grinding wheel 39 and the protruding surface, making it easier to grind it thoroughly.

[0033] By opening a strip-shaped through hole at the bottom of the frame 3, space is provided for the deflection of the contour grinding wheel 39, avoiding interference. The elastic force of the secondary spring 33 continuously acts on the U-shaped plate 34, and the reaction force keeps the contour grinding wheel 39 pressed against the raised surface. If the height of the raised surface is too large, the contour grinding wheel 39 will push the U-shaped plate 34 to slide continuously. When the mounting block 32 slides with the U-shaped plate 34 to the end of the mounting groove 31 and touches the trigger switch 6, the trigger switch 6 sends an electrical signal to the electric push rod 2 at the top of the walking frame 1. After receiving the signal, the electric push rod 2 starts, and its output end pushes the frame 3 as a whole away from the raised surface, thereby preventing the contour grinding wheel 39 from being damaged due to excessive pressure on the raised surface.

[0034] When a protrusion is encountered on one side of the two-sided grinding mechanism, the operator can cut off the power to the other side of the grinding mechanism to avoid over-grinding. Grinding can then be carried out on both sides after the protrusion has been ground.

[0035] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0036] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A rail web grinding device for railway lines, comprising a traveling frame (1) and two grinding mechanisms located at its bottom, each of the grinding mechanisms comprising a grinding motor (37) and a profile grinding wheel (39), wherein the grinding motor (37) drives the profile grinding wheel (39) to rotate, characterized in that: The bottom of the walking frame (1) is provided with a frame body (3), a U-shaped plate (34) is slidably connected inside the frame body (3), a rotating shaft (35) is rotatably connected inside the U-shaped plate (34), an L-shaped plate (36) is fixedly connected to the surface of the rotating shaft (35), the L-shaped plate (36) is fixedly connected to the grinding motor (37), two gears (4) are fixedly connected to the surface of the rotating shaft (35), and a rack (5) that meshes with the gears (4) is fixedly connected inside the frame body (3). When the contour grinding wheel (39) contacts the rail waist protrusion, it pushes the U-shaped plate (34) to slide. The gears (4) move synchronously with the U-shaped plate (34). The gears (4) rotate the rotating shaft (35) through meshing with the rack (5), and then drive the grinding motor (37) to move synchronously through the L-shaped plate (36). The frame (3) is slidably connected to the bottom of the walking frame (1).

2. The rail web grinding device for railway lines according to claim 1, characterized in that: Two electric push rods (2) are fixedly connected to the top of the walking frame (1), and the output end of the electric push rods (2) is fixedly connected to the frame (3).

3. The rail web grinding device for railway lines according to claim 1, characterized in that: The U-shaped plate (34) is fixedly connected to both sides of the mounting block (32), and the inner wall of the frame (3) is provided with a mounting groove (31) for the mounting block (32) to slide.

4. The rail web grinding device for railway lines according to claim 3, characterized in that: A secondary spring (33) is fixedly connected to the inner wall of the mounting groove (31), and the end of the secondary spring (33) away from the inner wall of the mounting groove (31) is fixedly connected to the mounting block (32).

5. The rail web grinding device for railway lines according to claim 4, characterized in that: The inner wall of the mounting groove (31) is equipped with a trigger switch (6) that cooperates with the mounting block (32). The trigger switch (6) is electrically connected to the electric push rod (2). The trigger switch (6) contacts the mounting block (32) and sends an electrical signal to the corresponding electric push rod (2).

6. The rail web grinding device for railway lines according to claim 1, characterized in that: The output end of the grinding motor (37) is equipped with a rotating shaft (38). The bottom of the rotating shaft (38) is provided with an annular boss. Several steel balls (311) are fixedly connected to the outer wall of the annular boss. A settling groove (310) is opened in the profile grinding wheel (39). A connecting sleeve (312) is fixedly connected in the settling groove (310). A through groove that mates with the rotating shaft (38) is opened in the connecting sleeve (312). A mating groove (313) that mates with the steel balls (311) is provided in the connecting sleeve (312). An inverted T-shaped locking nut (316) is installed in the threaded hole at the bottom of the profile grinding wheel (39). An installation shaft (317) is installed in the inverted T-shaped locking nut (316). A primary spring (314) is fixedly connected between the installation shaft (317) and the rotating shaft (38).

7. The rail web grinding device for railway lines according to claim 6, characterized in that: Each of the mating grooves (313) includes a semi-cylindrical hole and a hemispherical hole, which are connected, and the steel ball (311) is located in the area formed by the corresponding semi-cylindrical hole and hemispherical hole.

8. The rail web grinding device for railway lines according to claim 7, characterized in that: An arc-shaped rod (315) is fixedly connected to the bottom end of the rotating shaft (38).

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