Polishing machine for switch rail

Abstract

The invention discloses a switch rail grinding machine, relates to the technical field of steel rail grinding, and comprises a walking frame assembly which is placed on a steel rail and walks along the track of the steel rail; the grinding assembly is arranged on the walking frame assembly, the walking frame assembly is used for enabling the grinding assembly to walk on the walking frame assembly, and the walking frame assembly is further used for being folded into a pull rod to pull the grinding assembly to walk; the grinding assembly comprises a moving frame, a grinding assembly and a grinding assembly, wherein the moving frame walks on the walking frame assembly; and the adjusting assembly is arranged on the moving frame. The lithium battery is used as power, the abrasive belt is used for self-adaptively polishing the switch rail section, the abrasive belt of the equipment is attached to the contour of the abdomen of the steel rail, and the switch rail is polished smoothly. All parts can be modularized, disassembly and assembly are convenient, and adjustment and transportation pressure is reduced. The abrasive belt replaces a grinding wheel for grinding to be more attached to the opposite face of the steel rail, and the grinding time is shorter than that of the grinding wheel.

Description

Technical Field

[0001] The invention relates to the technical field of rail grinding, in particular to a point rail grinding machine. Background Art

[0002] Due to the rapid development of rail wave wear, rail surface abrasion, rail surface peeling, severe rail side wear, cracks and rail head crushing, the transportation capacity and operating efficiency are affected.

[0003] Analyzing the characteristics of wheel-rail interaction is crucial for extending the service life of rails. Therefore, railway engineering departments must regularly perform inspections and maintenance, typically using large rail grinding vehicles or single-head small rail grinders. Large rail grinding vehicles are expensive to purchase and operate, and their inventory is limited. Small rail grinders, when operated in groups, require extensive equipment and personnel, resulting in low efficiency for individual operations. Large machines are far superior to small grinders in terms of rail profile, wave wear treatment quality, and operational efficiency. Given the labor intensity, low efficiency, and need for quality improvement with small machines, increasing the inventory of large machines is a significant investment.

[0004] The large-scale grinding vehicles imported from China are expensive to operate. Meanwhile, the efficiency of small rail grinding machines is low and the quality needs to be improved, which creates a demand for equipment.

[0005] During railway operation, surface wear, fatigue cracks, indentations and depressions, fat edges, rust, etc. on rails affect wheel-rail contact, increase the risk of train vibration, noise, and operational safety, and affect transportation capacity and operating efficiency.

[0006] In view of the above situation, the following technologies are usually used for rail maintenance:

[0007] A: Rail Grinding Vehicle: It is a large-scale equipment specially used for rail grinding, equipped with multiple grinding units to grind rails simultaneously;

[0008] B: Small rail grinder: It is a portable device, usually used for fine grinding or repair of local rails;

[0009] C: Milling and grinding machine: It removes the damaged layer on the rail surface by rotating the milling cutter, but it removes a lot of material and may shorten the life of the rail;

[0010] D: Laser grinding equipment: uses high-energy laser to remove the damaged layer on the rail surface, reducing physical damage to the rail. However, the equipment and technology investment is huge and is suitable for small-scale fine grinding, not for large-scale operations.

[0011] E: Ultrasonic grinding equipment: uses ultrasonic vibration to remove the damaged layer on the rail surface, suitable for treating small cracks and damage;

[0012] Among the aforementioned technologies, rail grinding vehicles are the most widely used rail grinding equipment, but they are expensive and have a significant environmental impact. Small grinders are flexible but inefficient. Milling vehicles are suitable for severe damage but are expensive. Laser and ultrasonic grinding technologies offer high precision, but their cost and technical barriers limit their application. For example, Chinese patent CN211615189U discloses a lightweight, electrically controlled belt grinder that grinds the rail surface with a high-speed abrasive belt. While the grinding process offers low temperature rise and minimal damage to the rail material, the grinding process still relies on manual labor and is labor-intensive.

[0013] Moreover, the rail has an I-shaped cross section, which is divided into the rail head in contact with the wheel, the middle rail waist and the bottom rail. Moreover, in actual use, the rail has branches, large radius curves or small radius curves due to the layout of the extensive traffic tracks. Therefore, the above-mentioned technology cannot achieve flexible and multi-operation scenario grinding work. Therefore, how to provide a fine grinder that can adapt to complex working conditions and provide better support for railway maintenance has become the development direction of rail grinding technology. Summary of the Invention

[0014] The purpose of the present invention is to provide a point rail grinder, which has better grinding quality than a small machine and lower procurement and operation costs than a large machine. It is used for the treatment of rail wear and disease in turnout areas and mainline lines. It is a high-performance grinding equipment with easy operation, good working quality, high efficiency and low failure rate.

[0015] The purpose of the present invention can be achieved through the following technical solutions:

[0016] A switch rail grinding machine includes a grinding assembly and a traveling frame assembly, wherein the grinding assembly includes:

[0017] A mobile frame, which travels along the rail track through the traveling frame assembly and travels on the traveling frame assembly;

[0018] An adjustment assembly is rotatably mounted on the mobile frame, and the adjustment assembly includes a ball screw mechanism and a slide mechanism;

[0019] A swing angle assembly is rotatably mounted on the slide mechanism, and includes a second ball screw mechanism, a third ball screw mechanism, and a flip mechanism that are linked to each other;

[0020] The abrasive belt grinding head assembly is driven by the first ball screw mechanism, the slide mechanism, the second ball screw mechanism, the third ball screw mechanism and the flip mechanism to complete tilting, rotational translation, longitudinal, lateral and flipping movements to grind the rails in all directions.

[0021] As a further technical solution of the present invention: the traveling frame assembly includes a main frame and a traveling frame rotatably mounted on the main frame; the main frame and the traveling frame are both equipped with electric traveling wheels along the rail track.

[0022] As a further technical solution of the present invention: the walking frame assembly further includes:

[0023] The triangular wheel is arranged on the traveling frame near one end of the main frame. When the traveling frame is flipped to the main frame, the pointed rail grinder is pulled to move by the triangular wheel.

[0024] As a further technical solution of the present invention: lifting rods are provided at the four corners of the movable frame;

[0025] An L-shaped hook lock plate is fixedly installed at the bottom of the lifting rod, and a first guide wheel is installed at the bottom of the L-shaped hook lock plate;

[0026] Second guide wheels are further provided at the four corners of the movable frame, and the second guide wheels are arranged up and down with the first guide wheels.

[0027] As a further technical solution of the present invention: the adjustment component includes:

[0028] A support frame, one end of which is rotatably mounted on the mobile frame; and the other end of which is driven by a ball screw mechanism to perform arc motion on the mobile frame;

[0029] As a further technical solution of the present invention: the adjustment component further includes:

[0030] A sliding shaft is installed on one side of the support frame via a first threaded sleeve movably connected to the support frame in a ball screw mechanism;

[0031] A curved plate mounted on a movable frame;

[0032] The ball screw mechanism is tiltedly installed on the moving frame, and drives the sliding shaft to move along the arc groove opened on the arc plate through the first threaded sleeve to drive the support frame to rotate.

[0033] As a further technical solution of the present invention: the slide mechanism includes:

[0034] A rotating slide is slidably arranged on a support frame of the adjustment assembly;

[0035] Self-locking indexing pin, which is mounted on the rotating slide;

[0036] The swing angle assembly is rotatably mounted on the rotary slide via a swing frame and is limited by a self-locking indexing pin.

[0037] As a further technical solution of the present invention: the swing angle assembly includes:

[0038] Two sets of ball screw mechanisms are symmetrically mounted on both sides of the swing frame of the swing angle assembly to drive the sanding belt grinding head assembly to move longitudinally;

[0039] Two sets of ball screw mechanisms three are respectively mounted on the inner sides of the output ends of the two sets of ball screw mechanisms two, driving the sanding belt and grinding head assembly to move laterally;

[0040] The flipping mechanism includes a flipping motor that drives the sanding belt grinding head assembly to flip, and the flipping motor is installed at the output end of the ball screw mechanism three.

[0041] As a further technical solution of the present invention:

[0042] The synchronous drive component drives the two sets of ball screw mechanisms synchronously through the pulley transmission mechanism installed on the swing frame of the swing angle component to drive the sanding belt grinding head assembly component to move longitudinally.

[0043] Beneficial effects of the present invention:

[0044] The present invention can complete tilting, rotational translation, longitudinal, lateral and flipping movements to grind the rails in multiple directions through the setting of the grinding components; the present invention can pull the pointed rail grinder to move through the triangular wheel when the walking frame is flipped to the main frame through the setting of the walking frame component; and it is very portable to use.

[0045] The various parts of the present invention can be modularized, which is convenient for assembly and disassembly, reducing the pressure of adjustment and transportation; the present invention is smaller and lighter than the grinders on the market; the sanding belt of the present invention is easy to replace, and the grinding is more delicate. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] The present invention will be further described below with reference to the accompanying drawings.

[0047] Figure 1 It is a schematic structural diagram of the present invention as a whole;

[0048] Figure 2 It is a schematic diagram of the overall structure of the walking frame assembly of the present invention;

[0049] Figure 3 yes Figure 2 Schematic diagram of the enlarged structure of area A in the middle;

[0050] Figure 4 It is a schematic diagram of the overall structure of the grinding assembly of the present invention;

[0051] Figure 5 1 is a front view structural diagram of the grinding assembly of the present invention;

[0052] Figure 6 Schematic diagram of the overall structure of the swing angle assembly of the present invention;

[0053] Figure 7 This is a schematic structural diagram of the swing angle assembly of the present invention from another perspective;

[0054] Figure 8It is a schematic diagram of the overall structure of the positioning fixing member of the present invention;

[0055] Figure 9 It is a schematic diagram of the overall structure of the regulating assembly of the present invention;

[0056] Figure 10 Schematic diagram of the overall structure of the support frame of the present invention;

[0057] Figure 11 This is a schematic diagram of the rail side grinding state of the present invention;

[0058] Figure 12 This is a schematic diagram of the rail surface grinding state of the present invention;

[0059] Figure 13 It is a schematic diagram of the folded state of the present invention.

[0060] In the figure: 1. Traveling frame assembly; 2. Grinding assembly; 11. Main frame; 12. Traveling frame; 13. Round handle; 14. Electric traveling wheel; 15. Triangular wheel; 16. Component fixing frame; 17. Folding L-shaped frame; 18. Folding handle; 19. Guide rod; 110. Slide; 111. Notch; 112. Diagonal brace; 113. Self-locking block; 21. Moving frame; 22. Adjustment assembly; 23. Swing angle assembly; 24. Belt grinding head assembly; 211. Locking buckle; 212. Lifting rod; 213. First guide wheel; 214. Second guide wheel; 215. Arc plate; 221. First servo motor; 222. First lead screw; 223. First threaded sleeve ; 224. Support frame; 225. Locking handle; 226. Sliding shaft; 227. Rotating slide; 228. Self-locking indexing pin; 231. Swing frame; 232. First drive motor; 233. Gear; 234. Synchronous belt; 235. Synchronous pulley; 236. Threaded sleeve; 237. Positioning fixture; 238. Telescopic spring hanger; 239. Second lead screw; 2311. Sliding rod; 2312. Pulley; 2313. V-shaped wheel; 2314. Second servo motor; 2315. Flip motor; 2316. Slide plate; 2317. Horizontal slide rail; 241. Roller; 242. Second drive motor; 243. Sanding belt; 244. Sanding frame. DETAILED DESCRIPTION

[0061] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0062] See also Figure 1-3As shown, the present invention is a point rail grinding machine, comprising: a traveling frame assembly 1, for being placed on a rail and traveling along the rail track;

[0063] The walking frame assembly 1 includes a main frame 11 and a walking frame 12 rotatably mounted on the main frame 11; electric walking wheels 14 are installed on both the main frame 11 and the walking frame 12, and the electric walking wheels 14 are used to drive the walking frame assembly 1 to walk.

[0064] The traveling frame assembly 1 further includes: a triangular wheel 15, which is arranged on the traveling frame 12 near one end of the main frame 11; a component fixing frame 16, which is fixedly mounted on the main frame 11, and the interior of the component fixing frame 16 is generally fixed with a lithium battery and a control box;

[0065] A folding L-shaped frame 17, which is installed on one side of the component fixing frame 16; a folding handle 18, which is fixedly installed on the folding L-shaped frame 17; a diagonal brace 112, which is movably installed on the folding L-shaped frame 17 to form a triangular structure; one end of the diagonal brace 112 is slidably set in a slide groove 110 provided on the folding L-shaped frame 17, and is locked by a self-locking block 113, and the self-locking block 113 is rotatably connected to the folding L-shaped frame 17; a notch 111 is provided on the folding L-shaped frame 17, which can cooperate with the pin shaft on the diagonal brace 112 when folding to achieve flat folding; a round handle 13, which is set at one end of the walking frame 12.

[0066] Specifically, during use, the self-locking block 113 can be pulled, and then the folding L-shaped frame 17 and the folding handle 18 are folded along the direction of the diagonal support 112, and the diagonal support 112 slides in the slide groove 110; then the walking frame 12 is folded on the main frame 11, which is more convenient to carry. Figure 13 shown.

[0067] See Figure 4-5 As shown: It includes a grinding assembly 2, which is arranged on a walking frame assembly 1. The walking frame assembly 1 is used for the grinding assembly 2 to walk thereon, and the walking frame assembly 1 is also used to fold into a pull rod to pull the grinding assembly 2 to walk;

[0068] The polishing assembly 2 includes: a moving frame 21, and the moving frame 21 travels on the traveling frame assembly 1;

[0069] like Figure 9As shown, the four corners of the mobile frame 21 are each provided with a lifting rod 212, and the lifting rod 212 is locked by a lock buckle 211 after being raised and lowered and adjusted; an L-shaped hook lock plate is fixedly installed at the bottom of the lifting rod 212, and a first guide wheel 213 is installed at the bottom of the L-shaped hook lock plate; second guide wheels 214 are also provided at the four corners of the mobile frame 21, and the second guide wheel 214 and the first guide wheel 213 are arranged up and down, and slide and limit on the guide rod 19 on the main frame 11.

[0070] like Figure 9-10 As shown, it also includes an adjusting component 22, which includes a ball screw mechanism and a slide mechanism. The adjusting component 22 is arranged on the movable frame 21; one end of the support frame 224 is rotatably mounted on the movable frame 21; the sliding shaft 226 is arranged at the other end of the support frame 224; the locking handle 225 is installed at the end of the sliding shaft 226, and the locking handle 225 is adapted to the arc groove opened on the arc plate 215; the ball screw mechanism includes a first threaded sleeve 223, one end of the first threaded sleeve 223 is movably connected to the support frame 224, the first screw 222 is tilted, and the first screw 222 is threaded with a first threaded sleeve 223; the first servo motor 221 is movably mounted on the movable frame 21, and the first servo motor 221 drives the first screw 222 to rotate.

[0071] Specifically, the first servo motor 221 is started to drive the first screw 222 to rotate, and the first screw 222 drives the first threaded sleeve 223 to rise and fall, thereby driving the support frame 224 to move. Since the sliding shafts 226 on both sides of the support frame 224 move in the arc grooves opened on the arc plate 215, the device is more stable.

[0072] The slide mechanism includes a rotating slide 227 mounted on the support frame 224 and configured to drive the swing assembly 23 to slide horizontally and rotate in conjunction with the swing assembly 23; and a self-locking indexing pin 228 mounted on the rotating slide 227 and configured to lock the swing assembly 23. This structure facilitates the swing assembly 23 to move horizontally and rotate 180 degrees.

[0073] See Figure 6-7 As shown, the swing angle assembly 23 is arranged on the adjustment assembly 22, and the swing angle assembly 23 rotates on the mobile frame 21 and moves along its horizontal direction; the swing angle assembly 23 is used to drive the abrasive belt grinding head assembly 24 to move in multiple axes; the swing angle assembly 23 is also used to drive the abrasive belt grinding head assembly 24 to rotate;

[0074] The swing angle assembly 23 includes: a swing frame 231, which is rotatably connected to the rotating slide 227, and a limiting groove is provided on the swing frame 231 to cooperate with the self-locking indexing pin 228; when not rotating, the self-locking indexing pin 228 can be inserted into the limiting groove to achieve limiting.

[0075] The synchronous drive assembly is mounted in the middle of the swing frame 231 and includes a first drive motor 232 fixedly mounted on the swing frame 231; a gear 233 fixedly mounted on the output shaft of the first drive motor 232; and a synchronous belt 234 meshing with the gear 233 and sleeved onto two synchronous pulleys 235. Tensioners are provided on both sides of the synchronous belt 234 for adjusting its tension.

[0076] Ball screw mechanism 2, the two ball screw mechanisms 2 are symmetrically mounted on both sides of the swing frame 231. When the synchronous drive assembly is started, the two ball screw mechanisms 2 are driven to move, thereby realizing longitudinal height adjustment of the sanding belt grinding head assembly 24. The ball screw mechanism 2 includes: a second screw 239, the second screw 239 is rotatably mounted on the swing frame 231, and one end of the second screw 239 is fixedly connected to the synchronous pulley 235; a threaded sleeve 236, the threaded sleeve 236 is threadedly connected to the second screw 239; a sliding rod 2311, the two sliding rods 2311 are symmetrically mounted on both sides of the second screw 239, and a pulley 2312 is provided at the bottom of the sliding rod 2311, and the pulley 2312 moves along the guide rail track direction.

[0077] Ball screw mechanism three, the two ball screw mechanisms three are respectively installed on the inner side of the ball screw mechanism two, and are used to adjust the lateral position of the sanding belt grinding head assembly 24; the ball screw mechanism three includes: a transverse slide rail 2317, and a plurality of V-shaped wheels 2313 are provided on both sides of the transverse slide rail 2317, which are used to slide on the swing frame 231, and the transverse slide rail 2317 is installed on the threaded sleeve 236; a second servo motor 2314, and the second servo motor 2314 is fixedly installed on the transverse slide rail 2317; a slide plate 2316, and the slide plate 2316 is slidably installed on the transverse slide rail 2317, and is driven to slide by the second servo motor 2314, and a flip motor 2315 is installed on the slide plate 2316.

[0078] Specifically, the first drive motor 232 is started to drive the gear 233 to rotate, the gear 233 drives the synchronous belt 234 to rotate, and then drives the two synchronous pulleys 235 to rotate, the synchronous pulley 235 drives the second screw 239 to rotate, and the second screw 239 drives the threaded sleeve 236 and the positioning fixture 237 to rise and fall synchronously to adjust the height, and then the second servo motor 2314 is started to drive the slide plate 2316 to slide through the screw to perform lateral adjustment, and the flip motor 2315 is started to drive the sanding belt grinding head assembly 24 to flip so that its grinding position is more comprehensive; Figure 11 and Figure 12 As shown, the sanding belt grinding head assembly 24 can grind the side and top surfaces of the guide rail.

[0079] See Figure 8 As shown, the ball screw mechanism 2 further includes:

[0080] A positioning fixing part 237, wherein the positioning fixing part 237 is arranged on the second screw 239 and the sliding rod 2311, and the sliding rod 2311 can slide on the positioning fixing part 237; a telescopic spring hanger 238, wherein both ends of the telescopic spring hanger 238 are connected to the sliding rod 2311 through a connecting plate, and the telescopic spring hanger 238 and the two connecting plates are arranged in a Z shape, and a spring manual part is provided on the telescopic spring hanger 238.

[0081] Specifically, the spring manual member is pulled to drive the sliding rod 2311 to move through the telescopic spring hanger 238 and the connecting plate to adjust the position.

[0082] The flipping mechanism includes a sanding belt grinding head assembly component 24, which is arranged on the swing angle component 23. The sanding belt grinding head assembly component 24 is used to grind the side and top surfaces of the rail.

[0083] The belt grinding head assembly 24 includes a grinding frame 244 fixedly mounted on the output shaft of the flip motor 2315; two rollers 241 mounted on one side of the grinding frame 244, each having a sanding belt 243 sleeved thereon; and a second drive motor 242 mounted on the other side of the grinding frame 244, which drives one of the rollers 241 to rotate. When the second drive motor 242 is activated, the rollers 241 and the sanding belt 243 rotate, thereby performing grinding.

[0084] The working principle of the present invention is as follows: when in use, the traveling frame assembly 1 is placed on the rails, and the traveling frame assembly 1 is driven to travel by the electric traveling wheels 14;

[0085] Then start the grinding component 2, adjust the position and angle of the sanding belt grinding head assembly 24 through the adjustment component 22 and the swing angle component 23 on the grinding component 2, and then perform grinding through the sanding belt grinding head assembly 24.

[0086] The above is a detailed description of an embodiment of the present invention. However, the content described is only a preferred embodiment of the present invention and should not be considered to limit the scope of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A point rail grinding machine, comprising a grinding assembly (2) and a traveling frame assembly (1), characterized in that: The polishing assembly (2) comprises: A mobile frame (21) moves along a rail track through a traveling frame assembly (1) and moves on the traveling frame assembly (1); An adjusting assembly (22) is rotatably mounted on the moving frame (21), wherein the adjusting assembly (22) includes a ball screw mechanism and a slide mechanism; A swing angle assembly (23) is rotatably mounted on the slide mechanism, wherein the swing angle assembly (23) includes a second ball screw mechanism, a third ball screw mechanism and a flip mechanism that are linked to each other; The abrasive belt grinding head assembly (24) is driven by the first ball screw mechanism, the slide mechanism, the second ball screw mechanism, the third ball screw mechanism and the flip mechanism to complete tilting, rotational translation, longitudinal, transverse and flipping movements so as to grind the rail in multiple directions.

2. A point rail grinding machine according to claim 1, characterized in that: The traveling frame assembly (1) comprises a main frame (11) and a traveling frame (12) rotatably mounted on the main frame (11); both the main frame (11) and the traveling frame (12) are equipped with electric traveling wheels (14) along a steel rail track.

3. A point rail grinding machine according to claim 2, characterized in that: The walking frame assembly (1) further comprises: The triangular wheel (15) is arranged on a traveling frame (12) near one end of the main frame (11). When the traveling frame (12) is turned over to the main frame (11), the pointed rail grinding machine is pulled to move by the triangular wheel (15).

4. A point rail grinding machine according to claim 1, characterized in that: The four corners of the movable frame (21) are each provided with a lifting rod (212); An L-shaped hook lock plate is fixedly installed at the bottom of the lifting rod (212), and a first guide wheel (213) is installed at the bottom of the L-shaped hook lock plate; Second guide wheels (214) are also provided at the four corners of the movable frame (21), and the second guide wheels (214) and the first guide wheels (213) are arranged up and down.

5. A switch rail grinding machine according to claim 1, characterized in that: The adjustment component (22) includes: A support frame (224) is provided, wherein one end of the support frame (224) is rotatably mounted on the moving frame (21); and the other end is driven by a ball screw mechanism to perform arc motion on the moving frame (21).

6. A switch rail grinding machine according to claim 1, characterized in that: The adjustment component (22) further includes: A sliding shaft (226) is mounted on one side of the support frame (224) via a first threaded sleeve (223) movably connected to the support frame (224) in a ball screw mechanism; An arc-shaped plate (215) mounted on the movable frame (21); The ball screw mechanism is tiltedly mounted on the moving frame (21), and drives the sliding shaft (226) to move along the arc groove provided on the arc plate (215) through the first threaded sleeve (223), thereby driving the support frame (224) to rotate.

7. A switch rail grinding machine according to claim 1, 5 or 6, characterized in that: The slide mechanism comprises: A rotating slide (227) is slidably mounted on a support frame (224) of the adjustment assembly (22); A self-locking indexing pin (228) mounted on a rotary slide (227); The swing angle assembly (23) is rotatably mounted on a rotary slide (227) via a swing frame (231) and is limited in position by a self-locking indexing pin (228).

8. A point rail grinding machine according to claim 1, characterized in that: The swing angle assembly (23) comprises: Two sets of ball screw mechanisms (2) are symmetrically mounted on both sides of the swing frame (231) of the swing angle assembly (23) to drive the sanding belt grinding head assembly (24) to move longitudinally; Two sets of ball screw mechanisms 3 are respectively mounted on the inner sides of the output ends of the two sets of ball screw mechanisms 2 to drive the sanding belt grinding head assembly (24) to move laterally; The turning mechanism includes a turning motor (2315) for driving the sanding belt grinding head assembly (24) to turn over. The turning motor (2315) is installed at the output end of the ball screw mechanism three.

9. A switch rail grinding machine according to claim 1 or 8, characterized in that: Also includes: The synchronous driving assembly drives two sets of ball screw mechanisms synchronously through a pulley transmission mechanism installed on a swing frame (231) of the swing angle assembly (23) to drive the sanding belt grinding head assembly (24) to move longitudinally.

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