A rail splicing device and method for railway track construction

Abstract

This invention provides a rail docking device for railway track construction, comprising a rail transfer trolley for loading and transporting rails and a rail picking and placing mechanism. The rail picking and placing mechanism grabs the rails from the rail transfer trolley and places them in a predetermined position. The rail picking and placing mechanism includes a sliding frame component, a rail holding component, a bracket component, and a rail support component. The sliding frame component is slidably mounted on the rail transfer trolley, the rail holding component is mounted on the sliding frame component, and the rail support component is mounted on the bracket component. The rail support component supports the rail to be laid and moves downward along the bracket component to place the rail to be laid onto a sleeper in a predetermined position. This invention can stably and conveniently transport, dock, and install two rails simultaneously, reducing the overall footprint of the docking device, facilitating the movement of the docking device, improving railway construction efficiency, and increasing the accuracy of rail docking installation.

Description

Technical Field

[0001] This invention relates to the field of railway track construction technology, and in particular to a rail connection device and method for railway track construction. Background Technology

[0002] Railway track construction is a crucial part of railway construction. The laying process primarily utilizes specialized equipment such as sleeper laying machines and long rail transport vehicles. The sleeper laying machine is responsible for laying the sleepers, while the long rail transport vehicle is responsible for transporting the rails. When laying and connecting rails, the sleeper laying machine first transports the sleepers via a conveyor belt. Then, the sleepers are placed one by one at equal intervals on the pre-laid ballast. Next, the rails are joined and installed onto the laid and fixed sleepers, and finally, the rails are secured to the sleepers, completing the rail connection and installation.

[0003] A search revealed a Chinese patent application with patent number CN202310990434.X, which discloses a rail laying construction device and method for rail transit. The device includes a support frame and a lifting plate that slides with the support frame. First pull ropes are fixedly installed on both sides of the bottom surface of the lifting plate, and hooks are connected to the ends of the first pull ropes away from the lifting plate. However, the above technical solution can only transport one rail at a time and cannot transport and install two rails at the same time. Therefore, it still has the problem of not being able to transport and install two rails at the same time, resulting in low efficiency in railway construction. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a rail connection device and method for railway track construction, so as to solve the problems of inconvenient rail installation and low efficiency in the prior art.

[0005] To address the aforementioned problems, this invention provides a rail docking device for railway track construction. The device comprises a rail transfer trolley for loading and transferring rails and a rail picking and placing mechanism. The rail picking and placing mechanism is connected to the rail transfer trolley and is used to grab the rails from the trolley and place them in a predetermined position. The rail picking and placing mechanism includes a sliding frame component, a rail holding component, a bracket component, and a rail support component. The sliding frame component is slidably mounted on the rail transfer trolley and is capable of sliding along the direction in which the rail transfer trolley moves towards rail laying. The rail holding component is installed on the lower part of the sliding frame component away from the end of the rail transfer trolley. The rail holding component is used to hold one end of the rail to be laid and moves the rail to be laid in the direction of rail laying under the drive of the sliding frame component. The support component is located at the front end of the rail transfer trolley in the laying direction and is connected to the rail transfer trolley. The rail support component is installed on the support component and is used to support the rail to be laid and move downward along the support component to place the rail to be laid on the sleeper at the preset position.

[0006] The above-mentioned rail docking device for railway track construction is characterized in that: the rail transfer trolley includes a rail transfer trolley body and a sliding frame guide rail, the sliding frame guide rail is fixedly installed on the rail transfer trolley body along the length direction of the rail transfer trolley body; the sliding frame component includes a sliding frame body, a sliding frame rack, a sliding frame gear and a sliding frame drive, the sliding frame body is slidably installed on the sliding frame guide rail, the sliding frame rack is installed on the sliding frame body along the direction of the sliding frame guide rail, the sliding frame gear meshes with the sliding frame rack, and the sliding frame gear is used to push the sliding frame rack to drive the sliding frame body to slide along the sliding frame guide rail, the sliding frame drive is connected to the sliding frame gear, and the sliding frame drive is used to drive the sliding frame gear to rotate.

[0007] The above-mentioned rail docking device for railway track construction is characterized in that: the support components include a first support, a second support, a third support, and a support connecting structure; the first support, the second support, and the third support are arranged sequentially along the length direction of the rail transfer trolley; the support connecting structure is connected to the first support, the second support, and the third support respectively; the second support includes a second support body and a guide plate; the guide plate is fixedly installed on the second support body, and the guiding direction of the guide plate is perpendicular to the length direction of the rail transfer trolley; the support connecting structure includes a first connector, a second connector, and a sliding block; the sliding block is slidably installed on the guide plate; one end of the first connector is hinged to one side of the sliding block, and the other end of the first connector is hinged to the first support; one end of the second connector is hinged to the other side of the sliding block, and the other end of the second connector is hinged to the third support; and the first connector and the second connector are symmetrically arranged along the second support.

[0008] The above-mentioned rail connection device for railway track construction is characterized in that: the first support includes a left support leg, a left base plate, a left caster wheel, a right support leg, a right base plate, a right caster wheel, and a connecting beam; the left and right supports are vertically spaced apart; the connecting beam is located between the left and right supports, with one end fixedly connected to the top of the left support leg and the other end fixedly connected to the top of the right support leg; the left base plate is located below the left support leg and fixedly connected to it; the left caster wheel is located below the left base plate and fixedly connected to it; the right base plate is located below the right support leg and fixedly connected to it; and the right caster wheel is located below the right support leg and fixedly connected to it. The second support body includes a left support leg, a left base plate, a left caster wheel, a right support leg, a right base plate, and a right caster wheel. The left and right support legs are vertically spaced apart. A guide plate is located between the left and right support legs, with one end fixedly connected to the top of the left support leg and the other end fixedly connected to the top of the right support leg. The left base plate is located below and fixedly connected to the left support leg. The left caster wheel is located below and fixedly connected to the left base plate. The right base plate is located below and fixedly connected to the right support leg. The right caster wheel is located below and fixedly connected to the right base plate.

[0009] The above-mentioned rail connection device for railway track construction is characterized in that: the rail support component includes a lifting structure, a left rail support part, and a right rail support part; the lifting structure is installed on a second bracket; the left rail support part is located on the left side of the rail laying direction and is used to place the left rail into a predetermined position; the right rail support part is located on the right side of the rail laying direction and is used to place the right rail into a predetermined position; the lifting structure is connected to the left rail support part and the right rail support part respectively, and is used to simultaneously control the lifting of the left rail support part and the right rail support part to place the left rail and the right rail into the predetermined position.

[0010] The above-mentioned rail connection device for railway track construction is characterized in that: a first support leg groove is formed on the left side leg of the first support in a vertical direction, and a second support leg groove is formed on the left side leg of the second support in a vertical direction; the left rail support includes a first rail support, a second rail support, a third rail support, and a sliding connecting rod; the first rail support is connected to the left side leg of the first support, the second rail support is connected to the left side leg of the second support, and the third rail support is connected to the left side leg of the third support; the first rail support includes a first support body, a first support shaft, and a first buffer; the first support body is slidably connected to the first support leg groove, and one end of the first support body is located on the left side leg of the first support. Near the right leg of the first support, the other end of the first support body is located on the left leg of the first support away from the right leg of the first support. The first support shaft is horizontally inserted through the first support body and is located on the left leg of the first support near the right leg of the first support. The first buffer is connected to the end of the first support body near the right leg of the first support and is located below the first support shaft. The sliding connecting rod is arranged along the length of the transfer rail trolley and is located on the left leg of the first support away from the right leg of the first support. The end of the first support body on the left leg of the first support away from the right leg of the first support is fixedly connected to the end of the sliding connecting rod.

[0011] The above-mentioned rail connection device for railway track construction is characterized in that: the second rail support includes a second support body, a second support shaft, and a second buffer; the second support body is slidably connected to the second bracket leg groove; one end of the second support body is located on the side of the left bracket of the second bracket near the right bracket; the other end of the second support body is located on the side of the left bracket of the second bracket away from the right bracket; the second support shaft is horizontally inserted on the second support body and is located on the side of the left bracket of the second bracket near the right bracket; the second buffer is connected to the end of the second support body near the right bracket and is located below the second support shaft; a sliding hole is provided at the end of the second support body on the side of the left bracket of the first bracket away from the right bracket; and the sliding connecting rod is slidably connected to the second support body through the sliding hole.

[0012] The above-mentioned rail connection device for railway track construction is characterized in that: the first buffer includes a buffer mounting base, a front buffer cylinder, a front buffer plate, a rear buffer cylinder, a rear buffer plate, and a buffer airbag; the buffer mounting base is fixedly connected to a first support body; the buffer airbag is disposed below the buffer mounting base; the front buffer cylinder is arranged along the direction of rail laying and is located in front of the buffer mounting base; one end of the front buffer cylinder is fixedly connected to the buffer mounting base; the other end of the front buffer cylinder is fixedly connected to the front buffer plate; the rear buffer cylinder is also arranged along the direction of rail laying and is located behind the buffer mounting base; one end of the rear buffer cylinder is fixedly connected to the buffer mounting base; the other end of the rear buffer cylinder is fixedly connected to the rear buffer plate; and the buffer airbag is connected to both the front and rear buffer cylinders.

[0013] The above-mentioned rail docking device for railway track construction is characterized in that: the rail docking device for railway track construction further includes an unfolding airbag, the unfolding airbag is installed on the rail transfer trolley body, the first connecting member and the second connecting member are both cylinders, the unfolding airbag is connected to the first connecting member and the second connecting member through a pipeline, the sliding frame body is provided with a compression plate, the compression plate can compress the unfolding airbag when the sliding frame body slides forward; the sliding frame component further includes an extension rod and a magnetic insert, the extension rod is arranged on the front side inside the sliding frame body along the sliding direction of the sliding frame body, and the front end of the extension rod is fixedly connected to the sliding frame body, the magnetic insert is arranged on the upper part of the rear end of the extension rod, when the sliding frame body slides forward, the extension rod drives the first support to move forward through the magnetic insert.

[0014] The above-mentioned rail docking device for railway track construction is characterized in that: the rail transfer trolley further includes multiple bearing shafts, the bearing shafts are arranged on the rail transfer trolley body along the width direction of the rail transfer trolley body, and the bearing shafts are used to support the rail to be laid.

[0015] Compared with the prior art, the present invention has the following advantages:

[0016] 1. This invention enables stable and convenient simultaneous transportation, docking, and installation of two steel rails. During rail installation, the first, second, and third supports located at the front of the transfer trolley for hoisting the two rails automatically open, increasing the support area of ​​the supports for the rails to be installed. This allows the rails to be stably hoisted onto the sleepers. Simultaneously, the buffer not only cushions the impact but also clamps and limits the first, second, and third supports to both sides of the sleepers, preventing them from swaying during rail docking and improving docking accuracy. After the rails are installed and fixed on the sleepers, the first, second, and third supports automatically recombine at the front of the transfer trolley, reducing the overall footprint of the docking device and facilitating its movement. This improves both railway construction efficiency and the accuracy of rail docking installation.

[0017] 2. In this invention, when the rail support moves the rail downward, the buffer airbag located at the bottom of the buffer mounting seat will first contact the ground. At this time, the buffer airbag will be squeezed and fill the buffer cylinder with internal gas, thereby allowing the buffer cylinder to push the buffer plate forward, so that the entire movable frame can be clamped between the two sleepers, and the first support, second support and third support as a whole are clamped and limited.

[0018] 3. In this invention, when the sliding frame drive pushes the sliding frame body forward through the sliding frame gear, the compression plate on one side of the sliding frame body squeezes the unfolding airbag. After being squeezed, the unfolding airbag will fill the corresponding first and second connecting parts with internal gas, thereby allowing the first and second connecting parts to push the output axis to move outward, increasing the overall length of the first and second connecting parts, increasing the distance between the first, second and third supports, and further increasing the support area of ​​the first, second and third supports on the rail body.

[0019] 4. In this invention, workers can use hoisting equipment to lift the rails into the temporary storage rail trolley. After the rail body inside the transfer rail trolley leaves the transfer rail trolley under the push of the sliding frame, the bearing shaft inside the transfer rail trolley will rotate under the friction force at the bottom of the rail body. This rotation of the bearing shaft will drive the transmission rod to rotate, and the rotation of the transmission rod will drive the bearing shaft inside the temporary storage rail trolley to rotate in the same direction. Thus, the friction force between the bearing shaft and the bottom of the rail body will drive the rails temporarily stored inside the rail trolley to move forward, quickly replenishing the front of the transfer rail trolley with new rails. This allows the docking device to continuously dock and install rails, improving the efficiency of rail body transportation and docking installation.

[0020] The invention will now be described in further detail with reference to the accompanying drawings and embodiments. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural diagram of the rail transfer trolley traveling to the laying location in an embodiment of the present invention.

[0022] Figure 2 This is a schematic diagram of the structure of the first support, the second support, and the third support in an embodiment of the present invention when they are deployed from a first perspective.

[0023] Figure 3 This is a structural schematic diagram from a second perspective when the first support, second support, and third support are deployed in an embodiment of the present invention.

[0024] Figure 4 This is a partial structural diagram from a first perspective when the first support, the second support, and the third support are brought together in an embodiment of the present invention.

[0025] Figure 5 This is a schematic diagram of the structure of the first support, the second support, and the third support when they are brought together in an embodiment of the present invention, from a second perspective.

[0026] Figure 6 This is a top view of the first, second, and third supports in an embodiment of the present invention when they are deployed.

[0027] Figure 7 This is a three-dimensional structural diagram of the second track support in an embodiment of the present invention.

[0028] Figure 8 This is a three-dimensional structural diagram of the first track support in an embodiment of the present invention.

[0029] Explanation of reference numerals in the attached figures:

[0030] 1—Transfer rail trolley; 11—Transfer rail trolley body; 12—Sliding frame guide rail;

[0031] 13—Bearing shaft; 14—Reserved through slot; 2—Rail picking and lowering mechanism; 21—Sliding frame component; 211—Sliding frame body; 212—Sliding frame rack; 213—Sliding frame gear;

[0032] 214—Sliding frame drive; 215—Compression plate; 216—Extension rod; 217—Magnetic insert; 22—Rail support component; 23—Support component; 231—First support;

[0033] 2311—Left support leg of the first support; 2312—Left base plate of the first support;

[0034] 2313—Left swivel wheel of the first bracket; 2314—Right support leg of the first bracket;

[0035] 2315—Right side base plate of the first bracket; 2316—Right side caster wheel of the first bracket;

[0036] 2317—First support connecting beam; 2318—First support leg slide groove;

[0037] 232—Second support; 2321—Second support body; 2322—Guide plate;

[0038] 2323—Left support leg of the second support; 2324—Left base plate of the second support;

[0039] 2325—Left swivel wheel of the second bracket; 2326—Right support leg of the second bracket;

[0040] 2327—Right side base plate of the second bracket; 2328—Right side caster wheel of the second bracket;

[0041] 2329—Second support leg slide groove; 233—Third support; 234—Support connection structure; 235—First connector; 236—Second connector; 237—Sliding block;

[0042] 24—Rail support components; 241—Lifting structure; 2411—Traction motor; 2412—Rod;

[0043] 2413—Rewinding reel; 242—Left side rail support; 2421—First rail support;

[0044] 2422—Second track support; 24221—Second support body; 24222—Second support shaft;

[0045] 24223—Second buffer; 24224—Sliding hole; 24225—Guide sleeve;

[0046] 24226—Traction head; 2423—Third track support; 2424—Sliding connecting rod;

[0047] 2425—First support body; 2426—First support shaft; 2427—First buffer;

[0048] 24271—Buffer mounting base; 24272—Front buffer cylinder;

[0049] 24273—Front buffer plate; 24274—Rear buffer cylinder; 24275—Rear buffer plate; 24276—Buffer airbag; 2428—Limit stop block; 243—Right side track support;

[0050] 3—Deploy the airbag. Detailed Implementation

[0051] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0052] like Figures 1 to 3 As shown, this invention discloses a rail docking device for railway track construction, which includes a rail transfer trolley 1 for loading and transferring rails and a rail picking and dropping mechanism 2. The rail picking and dropping mechanism 2 is connected to the rail transfer trolley 1 and is used to grab the rails on the rail transfer trolley 1 and place the rails in a predetermined position. The rail picking and dropping mechanism 2 includes a sliding frame component 21, a rail holding component 22, a support component 23, and a rail support component 24. The sliding frame component 21 is slidably mounted on the rail transfer trolley 1 and can slide along the rail transfer trolley 1 in the direction of rail laying. The rail holding component 23... Component 22 is installed at the lower part of the sliding frame component 21 away from the end of the rail transfer trolley 1, and the rail holding component 22 is used to hold one end of the rail to be laid, and under the drive of the sliding frame component 21, it drives the rail to be laid to move in the direction of rail laying. The support component 23 is located at the front end of the rail transfer trolley 1 in the laying direction, and the support component 23 is connected to the rail transfer trolley 1. The rail support component 24 is installed on the support component 23, and the rail support component 24 is used to support the rail to be laid, and moves downward along the support component 23 to place the rail to be laid on the sleeper at the preset position.

[0053] In this embodiment, after the rail transfer trolley 1 is loaded with the rail to be laid, it carries the rail picking and dropping mechanism 2 installed at its front and the loaded rail to be laid, and runs along the laid track to the laying location. The rail holding component 22 on the rail picking and dropping mechanism 2 holds the front end of the rail to be laid on the rail transfer trolley 1. The sliding frame component 21 slides forward, driving the rail holding component 22 to move forward as well. The rail holding component 22 drives the held rail to move forward until the rail to be laid is transferred from the rail transfer trolley 1 to the rail support component 24. The rail support component 24 moves downward along the bracket component 23 to place the rail to be laid on the sleeper.

[0054] like Figure 1 , Figures 3 to 6As shown, the rail transfer trolley 1 includes a rail transfer trolley body 11 and a sliding frame guide rail 12. The sliding frame guide rail 12 is fixedly mounted on the rail transfer trolley body 11 along its length. The sliding frame component 21 includes a sliding frame body 211, a sliding frame rack 212, a sliding frame gear 213, and a sliding frame drive 214. The sliding frame body 211 is slidably mounted on the sliding frame guide rail 12. The sliding frame rack 212 is mounted on the sliding frame body 211 along the direction of the sliding frame guide rail 12. The sliding frame gear 213 meshes with the sliding frame rack 212 and is used to push the sliding frame rack 212 to drive the sliding frame body 211 to slide along the sliding frame guide rail 12. The sliding frame drive 214 is connected to the sliding frame gear 213 and is used to drive the sliding frame gear 213 to rotate.

[0055] In this embodiment, the sliding frame body 211 is a frame structure, and there are two sliding frame racks 212, which are respectively arranged on two sides of the frame structure parallel to the length direction of the transfer rail trolley body 11. There are also two sliding frame gears 213, which mesh with the corresponding sliding frame racks 212. The sliding frame drive 214 includes a drive motor and a transmission shaft. The drive motor is mounted on the transfer rail trolley body 11, and its output shaft is connected to the transmission shaft. Both sliding frame gears 213 are mounted on the transmission shaft. The drive motor can be a servo motor or a device that converts other forms of energy into torque, such as a motor driven by a pressure source, which is readily available in the working environment.

[0056] In this embodiment, the sliding frame component 21 further includes an extension rod 216 and a magnetic insert 217. The extension rod 216 is disposed on the front side inside the sliding frame body 211 along the sliding direction of the sliding frame body 211, and the front end of the extension rod 216 is fixedly connected to the sliding frame body 211. The magnetic insert 217 is disposed on the upper part of the rear end of the extension rod 216. When the sliding frame body 211 slides forward, the extension rod 216 drives the first support 231 to move forward through the magnetic insert 217, thereby unfolding the first support 231, the second support 232, and the third support 233.

[0057] like Figure 5As shown, the sliding frame component 21 also includes a connecting plate 218, a pushing frame 219, and a limiting block 2191. The connecting plate 218 is arranged along the width direction of the rail transfer trolley body 11. The connecting plate 218 is located at the end of the sliding frame component 21 near the rail transfer trolley body 11 and is fixedly connected to the sliding frame body 211. The pushing frame 219 is arranged below the connecting plate 218 and is fixedly connected to the connecting plate 218. It is used to cooperate with the rail holding component 22 to transfer the rail to be laid. The limiting block 2191 is arranged on the pushing frame 219 and is used to limit the rail placed on the rail transfer trolley body 11.

[0058] In this embodiment, the rail clamping component 22 includes two left and right clamps and a clamp drive. The two left and right clamps are installed below the front end of the sliding frame body 211. The clamp drive is connected to the two left and right clamps and is used to control the clamping and releasing of the two clamps. The clamp drive can be an electrically driven device that converts electrical energy into clamping force, such as a mechanism composed of a motor, reducer, and lead screw. The clamp drive can also be a pressure-driven device, such as a cylinder or hydraulic cylinder.

[0059] like Figure 1 As shown, the support component 23 includes a first support 231, a second support 232, a third support 233, and a support connecting structure 234. The first support 231, the second support 232, and the third support 233 are arranged sequentially along the length of the transfer rail trolley 1. The support connecting structure 234 is connected to the first support 231, the second support 232, and the third support 233 respectively. The second support 232 includes a second support body 2321 and a guide plate 2322. The guide plate 2322 is fixedly installed on the second support body 2321, and the guiding direction of the guide plate 2322 is perpendicular to the transfer rail. The length direction of the trolley 1 is perpendicular; the bracket connection structure 234 includes a first connector 235, a second connector 236 and a sliding block 237. The sliding block 237 is slidably mounted on the guide plate 2322. One end of the first connector 235 is hinged to one side of the sliding block 237, and the other end of the first connector 235 is hinged to the first bracket 231. One end of the second connector 236 is hinged to the other side of the sliding block 237, and the other end of the second connector 236 is hinged to the third bracket 233. The first connector 235 and the second connector 236 are symmetrically arranged along the second bracket 232.

[0060] In this embodiment, the first support 231, the second support 232, and the third support 233 can adjust their spacing and unfold to each other, thereby increasing the support area of ​​the first support 231, the second support 232, and the third support 233 for the rail to be laid, so that the rail can be stably placed on the sleeper.

[0061] like Figure 1 As shown, the first bracket 231 includes a left support leg 2311, a left base plate 2312, a left caster wheel 2313, a right support leg 2314, a right base plate 2315, a right caster wheel 2316, and a connecting beam 2317. The left support leg 2311 and the right support leg 2314 are vertically spaced apart. The connecting beam 2317 is located between the left support leg 2311 and the right support leg 2314, and one end of the connecting beam 2317 is fixedly connected to the top end of the left support leg 2311. The other end of the crossbeam 2317 is fixedly connected to the top of the right support leg 2314 of the first bracket. The left base plate 2312 of the first bracket is located below the left support leg 2311 of the first bracket and is fixedly connected to the left support leg 2311 of the first bracket. The left caster wheel 2313 of the first bracket is located below the left base plate 2312 of the first bracket and is fixedly connected to the left base plate 2312 of the first bracket. The right base plate 2315 of the first bracket is located below the right support leg 2314 of the first bracket and is fixedly connected to the right support leg 2314 of the first bracket. The right caster wheel 2316 of the first bracket is located below the right base plate 2315 of the first bracket and is fixedly connected to the right base plate 2315 of the first bracket.

[0062] The second support body 2321 includes a left support leg 2323, a left base plate 2324, a left caster wheel 2325, a right support leg 2326, a right base plate 2327, and a right caster wheel 2328. The left support leg 2323 and the right support leg 2326 are vertically spaced apart. The guide plate 2322 is located between the left support leg 2323 and the right support leg 2326, and one end of the guide plate 2322 is fixedly connected to the top end of the left support leg 2323, while the other end of the guide plate 2322 is fixedly connected to the top end of the left support leg 2323. The top of the right support leg 2326 of the bracket is fixedly connected. The left base plate 2324 of the second bracket is located below the left support leg 2323 of the second bracket and is fixedly connected to the left support leg 2323 of the second bracket. The left caster wheel 2325 of the second bracket is located below the left base plate 2324 of the second bracket and is fixedly connected to the left base plate 2324 of the second bracket. The right base plate 2327 of the second bracket is located below the right support leg 2326 of the second bracket and is fixedly connected to the right support leg 2326 of the second bracket. The right caster wheel 2328 of the second bracket is located below the right base plate 2327 of the second bracket and is fixedly connected to the right base plate 2327 of the second bracket.

[0063] In this embodiment, the third support 233 includes a left support leg, a left base plate, a left caster wheel, a right support leg, a right base plate, a right caster wheel, and a connecting beam. The left and right supports are vertically spaced apart. The connecting beam is located between the left and right supports, with one end fixedly connected to the top of the left support leg and the other end fixedly connected to the top of the right support leg. The left base plate is located below the left support leg and fixedly connected to it. The left caster wheel is located below the left base plate and fixedly connected to it. The right base plate is located below the right support leg and fixedly connected to it. The right caster wheel is located below the right base plate and fixedly connected to it.

[0064] like Figure 3 , Figure 4 and Figure 5 As shown, the rail support component 24 includes a lifting structure 241, a left rail support part 242, and a right rail support part 243. The lifting structure 241 is mounted on the second bracket 232. The left rail support part 242 is located on the left side of the rail laying direction and is used to place the left rail into a predetermined position. The right rail support part 243 is located on the right side of the rail laying direction and is used to place the right rail into a predetermined position. The lifting structure 241 is connected to the left rail support part 242 and the right rail support part 243 respectively, and is used to simultaneously control the lifting of the left rail support part 242 and the right rail support part 243 to place the left rail and the right rail into the predetermined position.

[0065] In this embodiment, the left track support 242 and the right track support 243 enable the rail docking device for railway track construction to simultaneously and stably grab, dock, and install two rails. During rail installation, the first support 231, the second support 232, and the third support 233 located at the front of the rail transfer trolley 1 automatically unfold, increasing the support area of ​​the first support 231, the second support 232, and the third support 233 for the rail to be laid, allowing the rail to be stably hoisted onto the sleeper.

[0066] In this embodiment, the lifting structure 241 includes a traction motor 2411, a rotating rod 2412, a take-up reel 2413, and a traction rope. The traction motor 2411 is mounted on one of the legs of the second support 232. One end of the rotating rod 2412 is rotatably connected to the left leg 2323 of the second support 232, and the other end of the rotating rod 2412 is rotatably connected to the right leg 2326 of the second support. The take-up reel 2413 is fixedly mounted on the rotating rod 2412. The output shaft of the traction motor 2411 is connected to the rotating rod 2412 to drive the rotating rod 2412 to rotate. One end of the traction rope is wound around the take-up reel 2413, and the other end is connected to the rail support component 24 to drive the rail support component 24 to move up and down along the support component 23.

[0067] In this embodiment, a traction head 24226 is provided on the upper part of the second track support 2422, and the other end of the traction rope is fixedly connected to the traction head 24226. The operator only needs to control the traction motor 2411 to drive the rotating rod 2412 to rotate in both directions, which allows the winding reel 2413 to wind up and unwind the traction rope connected to the traction head 24226, thereby pulling the second track support 2422 up and down. The second track support 2422 drives the first track support 2421 and the third track support 2423 to move together via the sliding connecting rod 2424. The sliding connecting rod 2424 is a rectangular tube. Of course, the lifting structure 241 can adopt a structure that is the same as or similar to that of existing winch equipment.

[0068] like Figure 1 As shown, the first support leg 2311 of the first support has a first support leg groove 2318 formed in the vertical direction, and the second support leg 2323 of the second support has a second support leg groove 2329 formed in the vertical direction; the left track support part 242 includes a first track support 2421, a second track support 2422, a third track support 2423 and a sliding connecting rod 2424. The first track support 2421 is connected to the left support leg 2311 of the first support, the second track support 2422 is connected to the left support leg 2323 of the second support, and the third track support 2423 is connected to the left support leg of the third support.

[0069] The first track support 2421 includes a first support body 2425, a first support shaft 2426, and a first buffer 2427. The first support body 2425 is slidably connected to the first support leg groove 2318. One end of the first support body 2425 is located on the side of the left support leg 2311 of the first support near the right support leg 2314 of the first support, and the other end of the first support body 2425 is located on the side of the left support leg 2311 of the first support away from the right support leg 2314 of the first support. The first support shaft 2426 is horizontally inserted through the first support body 2425 and is located on the left support leg 2314 of the first support. 11. On the side near the right leg 2314 of the first support, the first buffer 2427 is connected to one end of the first support body 2425 near the right leg 2314 of the first support, and the first buffer 2427 is located below the first support shaft 2426. The sliding connecting rod 2424 is arranged along the length of the transfer rail trolley 1, and the sliding connecting rod 2424 is located on the side of the left leg 2311 of the first support away from the right leg 2314 of the first support. One end of the first support body 2425 on the side of the left leg 2311 of the first support away from the right leg 2314 of the first support is fixedly connected to one end of the sliding connecting rod 2424.

[0070] like Figure 2 As shown, a limit stop 2428 is provided at the other end of the sliding connecting rod 2424 to prevent the second support body 24221 and the third support body from sliding off the sliding connecting rod 2424.

[0071] like Figure 7As shown, the second track support 2422 includes a second support body 24221, a second support shaft 24222, and a second buffer 24223. The second support body 24221 is slidably connected to the second bracket leg groove 2329. One end of the second support body 24221 is located on the side of the left support leg 2323 of the second bracket closer to the right support leg 2326 of the second bracket, and the other end of the second support body 24221 is located on the side of the left support leg 2323 of the second bracket away from the right support leg 2326 of the second bracket. The second support shaft 24222 is horizontally inserted through the second support body 24221. The second support shaft 24222 is located on the side of the left leg 2323 of the second bracket near the right leg 2326 of the second bracket. The second buffer 24223 is connected to the end of the second support body 24221 near the right leg 2326 of the second bracket, and the second buffer 24223 is located below the second support shaft 24222. The end of the second support body 24221 located on the side of the left leg 2311 of the first bracket away from the right leg 2314 of the first bracket has a sliding hole 24224. The sliding connecting rod 2424 is slidably connected to the second support body 24221 through the sliding hole 24224.

[0072] like Figure 7 As shown, the second support shaft 24222 is mounted on the second support body 24221 via a guide sleeve 24225. When placing the rail, the second support shaft 24222 can be pulled out from the guide sleeve 24225.

[0073] When it is necessary to connect and install rails with a certain curvature at a curve, the workers can adjust the corresponding positions of the second bracket 232 and the third bracket 233 by pushing them left and right according to the curvature of the rail. This is because when the sliding connecting rod 2424 and the sliding hole 24224 are matched in the width direction, a large gap is reserved. The first bracket 231, the second bracket 232 and the third bracket 233 can be arranged in a certain curvature so that the curved rail can be placed on the corresponding sleeper, thus completing the connection and installation of the rail at the curve and improving the applicability of the connection device.

[0074] like Figure 1As shown, the first buffer 2427 includes a buffer mounting base 24271, a front buffer cylinder 24272, a front buffer plate 24273, a rear buffer cylinder 24274, a rear buffer plate 24275, and a buffer airbag 24276. The buffer mounting base 24271 is fixedly connected to the first support body 2425. The buffer airbag 24276 is disposed below the buffer mounting base 24271. The front buffer cylinder 24272 is disposed along the direction of rail laying and is located in front of the buffer mounting base 24271. One end of the front buffer cylinder 24272 is connected to... The buffer mounting base 24271 is fixedly connected. The other end of the front buffer cylinder 24272 is fixedly connected to the front buffer plate 24273. The rear buffer cylinder 24274 is also arranged along the direction of the rail laying and is located behind the buffer mounting base 24271. One end of the rear buffer cylinder 24274 is fixedly connected to the buffer mounting base 24271, and the other end of the rear buffer cylinder 24274 is fixedly connected to the rear buffer plate 24275. The buffer airbag 24276 is connected to the front buffer cylinder 24272 and the rear buffer cylinder 24274 respectively.

[0075] In this embodiment, the structure of the first buffer 2427 is the same as that of the second buffer 24223.

[0076] In this embodiment, the structure of the second track support 2422 is the same as that of the third track support 2423.

[0077] In this embodiment, the left track support 242 and the right track support 243 have the same structure.

[0078] like Figure 1 , Figure 2 and Figure 5 As shown, the rail docking device for railway track construction also includes an unfolding airbag 3, which is installed on the rail transfer trolley body 11. The first connecting member 235 and the second connecting member 236 are both cylinders. The unfolding airbag 3 is connected to the first connecting member 235 and the second connecting member 236 through a pipeline. A compression plate 215 is provided on the sliding frame body 211. When the sliding frame body 211 slides forward, the compression plate 215 can compress the unfolding airbag 3. The sliding frame component 21 also includes an extension rod 216 and a magnetic insert 217. The extension rod 216 is arranged on the front side inside the sliding frame body 211 along the sliding direction of the sliding frame body 211, and the front end of the extension rod 216 is fixedly connected to the sliding frame body 211. The magnetic insert 217 is arranged on the upper part of the rear end of the extension rod 216. When the sliding frame body 211 slides forward, the extension rod 216 drives the first support 231 to move forward through the magnetic insert 217.

[0079] like Figure 1 As shown, the rail transfer trolley 1 also includes multiple bearing shafts 13, which are arranged along the width direction of the rail transfer trolley body 11 and are used to support the rails to be laid. The bearing shafts 13 are connected to each other by a transmission chain or transmission rod.

[0080] like Figure 5 As shown, a reserved through slot 14 is provided on the side wall of the rail transfer trolley body 11 near the first support 231, so that the workers can conveniently clamp the clamp shown on one end of the rail through the reserved through slot 14.

[0081] In use, the workers first hoist the rails to be laid into the rail transfer trolley 1. Then, the trolley 1 is pushed along the already laid rails by a trolley that can run on the rails. The trolley 1 is pushed to the part where the rails need to be connected and installed, and then it stops. As the trolley 1 moves forward, it pushes the first support 231, the second support 232, and the third support 233, which are close together in front of it, to move forward with the support of the casters. After the trolley 1 stops, the first support 231, the second support 232, and the third support 233 at the front of the trolley 1 will move to the top of the multiple sleepers where the rails have not been laid.

[0082] First, the staff uses the rail clamping component 22 to clamp the rails placed on the rail transfer trolley 1. The rail clamping component 22 can be specifically structured as two clamps fixed below the sliding frame component 21, each clamping one end of a rail on the left or right. At this time, the two rails are still placed on the bearing shaft 13 inside the rail transfer trolley 1. Then, the sliding frame drive 214 is activated, causing the two sliding frame gears 213 to rotate. When the sliding frame gears 213 rotate, they push the sliding frame component 21 as a whole forward on the top of the rail transfer trolley 1 through the sliding frame rack 212 that meshes with them. This pushes the sliding frame body 211 as a whole through the first support 231 and the second support 232 and continues to move forward. After the magnetic insert 217 on one side of the extension rod 216 moves to the side of the third bracket 233, the magnetic insert 217 adheres to and abuts against the outer wall of the third bracket 233, thereby pushing the third bracket 233 forward as a whole. When the third bracket 233 moves forward, it will pull the first bracket 231 and the second bracket 232 on one side forward through the first connector 235 that is rotatably connected to the outer wall. This allows the first bracket 231, the second bracket 232 and the third bracket 233 to open up under the guidance of the first connector 235 and the sliding block 237, thereby improving the support shaft 2426 connected to the inner wall of the first bracket 231, the second bracket 232 and the third bracket 233 for the track pulled out by the clamp.

[0083] After the rail as a whole is moved out of the rail transfer trolley 1 by the sliding frame component 21, the staff controls the sliding frame drive 214 to stop rotating. Then, the clamps are released from the rail end. The staff then activates the traction mechanism on the outer wall of the second support 232 to pull the rail support component 24, which is slidably connected to the inner walls of the first support 231, the second support 232 and the third support 233, downward at a constant speed. The rail supported on the rail support component 24 is pulled downward at a constant speed until the bottom of the rail is placed on the sleeper. During the downward movement of the rail support component 24, the front buffer cylinder 24272 and the rear buffer cylinder 24274 at the bottom will push their corresponding buffer plates to unfold and support between the two sleepers, thus supporting and limiting the movement of the rail support component 24 between the two sleepers.

[0084] After the workers complete the docking and installation of the rails and fix them to the sleepers, the first support shaft 2426, which is slidably connected to the inner wall of the guide sleeve 24225, can be pulled out from both sides of the first bracket 231, the second bracket 232, and the third bracket 233. Then, the traction mechanism is activated to pull the rail support component 24 upward and reset it. After that, the first support shaft 2426 is inserted back into the corresponding guide sleeve 24225. Then, the sliding frame drive 214 is controlled to rotate in the opposite direction, and the sliding frame component 21 moves back as a whole. As the sliding frame component 21 moves back, it will pull the third bracket 233 back as a whole through the magnetic insert 217 connected to the outer wall of the third bracket 233 on one side of the extension rod 216. This will push the first bracket 231, the second bracket 232, and the third bracket 233 to be stacked back on one side of the rail transfer trolley 1.

[0085] This invention also discloses a method for connecting steel rails in railway track construction, such as... Figures 1 to 8 As shown, it includes the following steps:

[0086] S1: The rails are hoisted onto the bearing shaft 13 inside the rail transfer trolley 1 using hoisting equipment. The rail transfer trolley 1 is then moved along the laid rails by a trolley that can run on the rails. The rail transfer trolley 1 is then moved to the part where the rails need to be connected and installed and then stopped.

[0087] S2: Using the rail clamping component 22 to clamp one end of the corresponding rail, start the sliding frame drive 214 to drive the sliding frame body 211 to move forward, and pull the rail inside the transfer rail trolley 1 into the unfolded first support 231, second support 232 and third support 233.

[0088] S3: Control the lifting structure 241 to pull the rail downwards, place the rail on the sleeper for docking and installation, fix the rail on the sleeper, first pull out the support shaft, then control the lifting structure 241 to drive the rail support component 24 to move upwards and reset, and then insert the support shaft back into the guide sleeve 24225.

[0089] S4: Control the sliding frame drive 214 to move the sliding frame body 211 back and reset it. Then continue to repeat the above installation process on the rails inside the rail transfer trolley 1, so that the rails can be continuously connected and installed.

[0090] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A rail docking device for railway track construction, characterized in that, It includes a rail transfer trolley (1) for loading and transferring rails and a rail picking and dropping mechanism (2), wherein the rail picking and dropping mechanism (2) is connected to the rail transfer trolley (1) and is used to pick up the rails on the rail transfer trolley (1) and place the rails in a predetermined position. The rail picking and laying mechanism (2) includes a sliding frame component (21), a rail holding component (22), a support component (23), and a rail support component (24). The sliding frame component (21) is slidably mounted on the rail transfer trolley (1) and can slide along the rail transfer trolley (1) in the direction of rail laying. The rail holding component (22) is installed on the lower part of the sliding frame component (21) away from the rail transfer trolley (1), and the rail holding component (22) is used to hold the rail to be laid. The end, and driven by the sliding frame component (21), moves the rail to be laid in the direction of rail laying. The support component (23) is located at the front end of the rail transfer trolley (1) in the laying direction, and the support component (23) is connected to the rail transfer trolley (1). The rail support component (24) is installed on the support component (23), and the rail support component (24) is used to support the rail to be laid, and moves downward along the support component (23) to place the rail to be laid on the sleeper at the preset position. The support component (23) includes a first support (231), a second support (232), a third support (233), and a support connection structure (234). The first support (231), the second support (232), and the third support (233) are arranged sequentially along the length of the transfer rail trolley (1). The support connection structure (234) is connected to the first support (231), the second support (232), and the third support (233) respectively. The second support (232) includes a second support body (2321) and a guide plate (2322). The guide plate (2322) is fixedly installed on the second support body (2321), and the guiding direction of the guide plate (2322) is perpendicular to the length direction of the transfer rail trolley (1). The bracket connection structure (234) includes a first connector (235), a second connector (236), and a sliding block (237). The sliding block (237) is slidably mounted on the guide plate (2322). One end of the first connector (235) is hinged to one side of the sliding block (237), and the other end of the first connector (235) is hinged to the first bracket (231). One end of the second connector (236) is hinged to the other side of the sliding block (237), and the other end of the second connector (236) is hinged to the third bracket (233). The first connector (235) and the second connector (236) are symmetrically arranged along the second bracket (232).

2. The rail docking device for railway track construction according to claim 1, characterized in that: The transfer rail trolley (1) includes a transfer rail trolley body (11) and a sliding frame guide rail (12). The sliding frame guide rail (12) is fixedly installed on the transfer rail trolley body (11) along the length direction of the transfer rail trolley body (11). The sliding frame component (21) includes a sliding frame body (211), a sliding frame rack (212), a sliding frame gear (213), and a sliding frame drive (214). The sliding frame body (211) is slidably mounted on the sliding frame guide rail (12). The sliding frame rack (212) is mounted on the sliding frame body (211) along the direction of the sliding frame guide rail (12). The sliding frame gear (213) meshes with the sliding frame rack (212) and is used to push the sliding frame rack (212) to drive the sliding frame body (211) to slide along the sliding frame guide rail (12). The sliding frame drive (214) is connected to the sliding frame gear (213) and is used to drive the sliding frame gear (213) to rotate.

3. The rail connection device for railway track construction according to claim 1, characterized in that: The first bracket (231) includes a left support leg (2311), a left base plate (2312), a left caster wheel (2313), a right support leg (2314), a right base plate (2315), a right caster wheel (2316), and a connecting beam (2317). The left support leg (2311) and the right support leg (2314) are vertically spaced apart. The connecting beam (2317) is located between the left support leg (2311) and the right support leg (2314), and one end of the connecting beam (2317) is fixedly connected to the top of the left support leg (2311). The other end of the beam (2317) is fixedly connected to the top of the right support leg (2314) of the first bracket. The left bottom plate (2312) of the first bracket is located below the left support leg (2311) of the first bracket and is fixedly connected to the left support leg (2311) of the first bracket. The left caster wheel (2313) of the first bracket is located below the left bottom plate (2312) of the first bracket and is fixedly connected to the left bottom plate (2312) of the first bracket. The right bottom plate (2315) of the first bracket is located below the right support leg (2314) of the first bracket and is fixedly connected to the right support leg (2314) of the first bracket. The right caster wheel (2316) of the first bracket is located below the right bottom plate (2315) of the first bracket and is fixedly connected to the right bottom plate (2315) of the first bracket. The second support body (2321) includes a left support leg (2323), a left base plate (2324), a left caster wheel (2325), a right support leg (2326), a right base plate (2327), and a right caster wheel (2328). The left support leg (2323) and the right support leg (2326) are vertically spaced apart. The guide plate (2322) is located between the left support leg (2323) and the right support leg (2326), and one end of the guide plate (2322) is fixedly connected to the top of the left support leg (2323), and the other end of the guide plate (2322) is fixedly connected to the top of the left support leg (2323). The top of the right support leg (2326) of the second bracket is fixedly connected. The left base plate (2324) of the second bracket is located below the left support leg (2323) of the second bracket and is fixedly connected to the left support leg (2323). The left caster wheel (2325) of the second bracket is located below the left base plate (2324) of the second bracket and is fixedly connected to the left base plate (2324). The right base plate (2327) of the second bracket is located below the right support leg (2326) of the second bracket and is fixedly connected to the right support leg (2326). The right caster wheel (2328) of the second bracket is located below the right base plate (2327) of the second bracket and is fixedly connected to the right base plate (2327).

4. A rail connection device for railway track construction according to claim 1 or 3, characterized in that: The rail support component (24) includes a lifting structure (241), a left rail support (242), and a right rail support (243). The lifting structure (241) is mounted on the second bracket (232). The left rail support (242) is located on the left side of the rail laying direction and is used to place the left rail in a predetermined position. The right rail support (243) is located on the right side of the rail laying direction and is used to place the right rail in a predetermined position. The lifting structure (241) is connected to the left rail support (242) and the right rail support (243) respectively and is used to simultaneously control the lifting of the left rail support (242) and the right rail support (243) to place the left rail and the right rail in the predetermined position.

5. A rail connection device for railway track construction according to claim 4, characterized in that: The first support leg (2311) of the first support is provided with a first support leg groove (2318) along the vertical direction, and the second support leg (2323) of the second support is provided with a second support leg groove (2329) along the vertical direction. The left track support (242) includes a first track support (2421), a second track support (2422), a third track support (2423), and a sliding connecting rod (2424). The first track support (2421) is connected to the left leg (2311) of the first bracket, the second track support (2422) is connected to the left leg (2323) of the second bracket, and the third track support (2423) is connected to the left leg of the third bracket. The first track support (2421) includes a first support body (2425), a first support shaft (2426), and a first buffer (2427). The first support body (2425) is slidably connected to the slide groove (2318) of the first bracket leg, and one end of the first support body (2425) is located on the side of the left leg (2311) of the first bracket close to the right leg (2314) of the first bracket, and the other end of the first support body (2425) is located on the side of the left leg (2311) of the first bracket far from the right leg (2314). On the side away from the right leg (2314) of the first support, the first support shaft (2426) is horizontally inserted on the first support body (2425), and the first support shaft (2426) is located on the side of the left leg (2311) of the first support close to the right leg (2314) of the first support. The first buffer (2427) is connected to one end of the first support body (2425) on the side of the right leg (2314) of the first support, and the first buffer (2427) is located below the first support shaft (2426). The sliding connecting rod (2424) is arranged along the length direction of the transfer rail trolley (1), and the sliding connecting rod (2424) is located on the side of the left leg (2311) of the first support away from the right leg (2314) of the first support. One end of the first support body (2425) on the side of the left leg (2311) of the first support away from the right leg (2314) of the first support is fixedly connected to one end of the sliding connecting rod (2424).

6. A rail connection device for railway track construction according to claim 5, characterized in that: The second track support (2422) includes a second support body (24221), a second support shaft (24222), and a second buffer (24223). The second support body (24221) is slidably connected to the second support leg groove (2329). One end of the second support body (24221) is located on the side of the left support leg (2323) of the second support near the right support leg (2326) of the second support, and the other end of the second support body (24221) is located on the side of the left support leg (2323) of the second support away from the right support leg (2326) of the second support. The second support shaft (24222) is horizontally inserted through the second support body (24221), and the second support shaft (24222) is horizontally inserted through the second support body (24221). The second support shaft (24222) is located on the side of the left leg (2323) of the second bracket close to the right leg (2326) of the second bracket. The second buffer (24223) is connected to one end of the second support body (24221) close to the right leg (2326) of the second bracket. The second buffer (24223) is located below the second support shaft (24222). The second support body (24221) is located on the side of the left leg (2311) of the first bracket away from the right leg (2314) of the first bracket, and a sliding hole (24224) is provided at one end. The sliding connecting rod (2424) and the second support body (24221) are slidably connected through the sliding hole (24224).

7. A rail connection device for railway track construction according to claim 5, characterized in that: The first buffer (2427) includes a buffer mounting base (24271), a front buffer cylinder (24272), a front buffer plate (24273), a rear buffer cylinder (24274), a rear buffer plate (24275), and a buffer airbag (24276). The buffer mounting base (24271) is fixedly connected to the first support body (2425). The buffer airbag (24276) is located below the buffer mounting base (24271). The front buffer cylinder (24272) is arranged along the direction of rail laying and is located in front of the buffer mounting base (24271). One end of the front buffer cylinder (24272) is... The front buffer cylinder (24272) is fixedly connected to the buffer mounting base (24271), and the other end of the front buffer cylinder (24272) is fixedly connected to the front buffer plate (24273). The rear buffer cylinder (24274) is also arranged along the direction of rail laying and is located behind the buffer mounting base (24271). One end of the rear buffer cylinder (24274) is fixedly connected to the buffer mounting base (24271), and the other end of the rear buffer cylinder (24274) is fixedly connected to the rear buffer plate (24275). The buffer airbag (24276) is connected to the front buffer cylinder (24272) and the rear buffer cylinder (24274) respectively.

8. A rail connection device for railway track construction according to claim 2, characterized in that: The rail docking device for railway track construction also includes an unfolding airbag (3), which is installed on the rail transfer trolley body (11). The first connecting piece (235) and the second connecting piece (236) are both cylinders. The unfolding airbag (3) is connected to the first connecting piece (235) and the second connecting piece (236) through a pipeline. A compression plate (215) is provided on the sliding frame body (211). When the sliding frame body (211) slides forward, the compression plate (215) can compress the unfolding airbag (3). The sliding frame component (21) further includes an extension rod (216) and a magnetic insert (217). The extension rod (216) is disposed on the front side inside the sliding frame body (211) along the sliding direction of the sliding frame body (211), and the front end of the extension rod (216) is fixedly connected to the sliding frame body (211). The magnetic insert (217) is disposed on the upper part of the rear end of the extension rod (216). When the sliding frame body (211) slides forward, the extension rod (216) drives the first bracket (231) to move forward through the magnetic insert (217).

9. A rail connection device for railway track construction according to claim 2, characterized in that: The rail transfer trolley (1) also includes multiple bearing shafts (13), which are arranged on the rail transfer trolley body (11) along the width direction of the rail transfer trolley body (11) and are used to support the rail to be laid.

Images