Rail web polishing device

Abstract

The utility model relates to a rail web polishing device which comprises a polishing head assembly, a first movable nut is arranged on a connecting base, and a roller is rotationally connected to one side of the connecting base. According to the transmission assembly, a first transmission rod is rotationally connected with the supporting frame, the output end of a first driving piece is connected with the first transmission rod, and a first movable nut is arranged on the first transmission rod in a sleeving mode and can move along the first transmission rod; the supporting plate is perpendicular to the track, the first transmission rod is parallel to the supporting plate, the supporting frame is slidably connected with the supporting plate, the supporting plate is provided with a sliding groove, and the roller is located in the sliding groove; the lifting assembly and the second movable nut are arranged on the second transmission rod in a sleeving mode, the second movable nut is connected with the supporting frame, the first connecting plate is connected with the supporting plate, the second driving piece is connected with the first connecting plate, and the output end of the second driving piece is connected with the second transmission rod. The device has the advantages that the device is accurately attached to the rail web position of the steel rail, and the grinding quality is improved; grinding time is short, and replacement is easy; all the components can be freely folded and stored, and transportation and storage are convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of rail grinding, in particular to a rail waist grinding device. Background Art

[0002] Rail joints are used as connecting parts between rails, which are mainly composed of plywood and bolts. Rail glued insulating joints are a special rail joint, whose main function is to connect two rails and block the signals of the two rails. When installing or replacing rails, it is necessary to install or replace the glued plywood on the rails. When installing or replacing the glued plywood, it is necessary to glue the plywood glued surface to the rail waist.

[0003] However, at the new insulating joint, the residues on the bonding surface of the rail waist, such as residual glue and rust, need to be ground, derusted and polished before bonding can be carried out to ensure the quality of bonding; at the same time, when replacing the rail insulating splint, it is also necessary to remove glue, rust and polish the rail waist joint.

[0004] At present, manual hand-held angle grinders, grinding wheels and polishers are mostly used to remove glue, rust and polish insulating joints. However, the current grinding equipment is generally large in size and inconvenient to store and transport, which makes the grinding work laborious and time-consuming, and the effect is unstable. In addition, traditional grinding equipment on the market mostly uses grinding wheels for grinding, which also has the disadvantages of not fitting the rail surface and long grinding time. In addition, it uses internal combustion engines as the power source, which is noisy, polluting, vibrating and has low stability. Summary of the invention

[0005] The purpose of the utility model is to provide a rail waist grinding device based on the above-mentioned deficiencies of the prior art. The device uses an abrasive belt for grinding so as to accurately fit the position of the rail waist. The grinding time is short and it is easy to replace. At the same time, each component can be folded and retracted freely for easy transportation and storage. Lithium batteries are used as power sources, and the device has the advantages of high efficiency, low noise, low pollution, low vibration, and high stability.

[0006] The purpose of this utility model is achieved by the following technical solutions:

[0007] A rail waist grinding device is used for grinding the rail waist of a rail, characterized in that the device comprises:

[0008] Grinding head assembly, transmission assembly, support plate, lifting assembly;

[0009] The grinding end of the grinding head assembly can contact the waist of the rail, and the grinding head assembly includes a load-bearing frame, on which a grinding motor and a grinding belt wheel group are arranged, the grinding motor is connected to the grinding belt wheel group in a transmission manner, and the grinding belt wheel group is used to install a grinding belt; the load-bearing frame is provided with a first movable nut, and a roller is rotatably connected to one side of the load-bearing frame;

[0010] The transmission assembly includes a support frame, a first driving member and a first transmission rod, the first transmission rod is rotatably connected to the support frame, the output end of the first driving member is connected to the first transmission rod, and the first movable nut is sleeved on the first transmission rod and can move along the first transmission rod;

[0011] The support plate is perpendicular to the rail, the first transmission rod is parallel to the support plate, the support frame is slidably connected to the support plate, the support plate is provided with a slide groove, and the roller is located in the slide groove;

[0012] The lifting assembly includes a second driving member, a second transmission rod, a second movable nut and a first connecting plate, the second movable nut is sleeved on the second transmission rod, and the second movable nut is connected to the support frame, the first connecting plate is connected to the support plate, the second driving member is connected to the first connecting plate, and the output end of the second driving member is connected to the second transmission rod.

[0013] The supporting frame is connected to connecting frames on opposite sides respectively, the first transmission rod is rotatably connected between the connecting frames on both sides, the end of the first transmission rod is connected to a driven gear, and the output end of the first driving member is matched with the driven gear through a chain.

[0014] The support frame is connected to blocks on two opposite sides, the first transmission rod passes through the blocks and forms a rotational fit with the blocks, a first slider is provided on the side of the block away from the support frame, and a first slide rail that cooperates with the first slider is provided on one side of the support plate; a sliding fit is formed between the first slider and the first slide rail.

[0015] A guide rod is connected to the opposite side of the stopper, and the guide rod is slidably connected to the load-bearing frame.

[0016] The support plate is connected to a clamping assembly on one side away from the grinding head assembly, and the clamping assembly includes a clamping seat, and a clamping claw is symmetrically hinged on the side of the clamping seat close to the rail, and an abutment block is provided on the side of the clamping claw away from the rail. A connecting shaft is rotatably connected to the side of the clamping seat away from the rail, and a locking block is sleeved on the connecting shaft and can abut against the abutment block.

[0017] The abutting surfaces of the locking block and the abutting block are in an arc shape, and a first handle is connected to one end of the rotating shaft away from the rail.

[0018] A second sliding block is connected to one side of the clamping seat close to the supporting plate, and a second sliding rail slidably connected to the second sliding block is provided on the side wall of the supporting plate.

[0019] A guide block is connected to the side of the support plate away from the grinding head assembly, the guide block is slidably connected to a slide rod, the guide block is fixed to the slide rod by a fastener, and a universal wheel is connected to the end of the slide rod close to the rail.

[0020] A second handle is hingedly connected to one end of the slide bar away from the rail.

[0021] The support plate is connected to a side wheel frame extending toward the adjacent rail, the middle position of the side wheel frame is hinged to form a foldable structure, and one end of the side wheel frame away from the support plate is rotatably connected to a side wheel abutting against the adjacent rail.

[0022] The advantages of the utility model are: it can accurately fit the waist position of the rail, and grind the waist of the rail in a relatively fixed state, thereby improving the grinding quality; the grinding time is short and it is easy to replace; at the same time, each component can be folded and retracted freely, which is convenient for transportation and storage, reducing storage and transportation costs; it uses lithium batteries as a power source, and has the advantages of high efficiency, low noise, low pollution, low vibration, and high stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the structure of the utility model;

[0024] Figure 2 It is a structural schematic diagram of the main part of the utility model;

[0025] Figure 3 It is a schematic diagram of the assembly structure of the grinding head assembly and the grinding head locking frame in the utility model;

[0026] Figure 4 This is a schematic diagram of the structure of the grinding head assembly in the utility model;

[0027] Figure 5 It is a structural schematic diagram of the main frame in the utility model;

[0028] Figure 6 This is a schematic diagram of the structure of the clamping assembly in the utility model;

[0029] Figure 7 It is a structural schematic diagram of the middle side wheel frame of the utility model;

[0030] Figure 8 It is a structural schematic diagram of the grinding head locking frame in the utility model. DETAILED DESCRIPTION

[0031] The following is a further detailed description of the features of the present invention and other related features through embodiments in conjunction with the accompanying drawings to facilitate understanding by technicians in the same industry:

[0032] like Figure 1-8 As shown, each is represented as follows:

[0033] Support frame 1, transmission assembly 2, lifting assembly 3, side wheel frame 4, grinding head assembly 5, universal wheel 6, clamping assembly 7, rail 8;

[0034] A first slide rail 11, a fourth connecting plate 12, a running wheel 13, and a slide groove 14;

[0035] A center frame 21, a connecting frame 22, a first driving member 23, a first transmission rod 24, a guide rod 25, a stopper 26, and a first sliding block 27;

[0036] A second driving member 31, a first connecting plate 32, a second transmission rod 33, and a second movable nut 34;

[0037] Side wheels 41, folding hinges 42;

[0038] The load-bearing frame 51, the second connecting plate 52, the grinding motor 53, the gear assembly 54, the third connecting plate 55, the sanding belt driving wheel 56, the sanding belt driven wheel 57, the sanding belt tensioning wheel 58, and the baffle 59;

[0039] Guide block 61, slide bar 62, second handle 63;

[0040] A second slide rail 71, a clamping seat 72, a second slide block 73, a clamping claw 74, an abutment block 75, a connecting shaft 76, a first handle 77, and a locking block 78;

[0041] Driven gear 221, tensioning gear 222, chain 223;

[0042] The first movable nut 511 , the limiting rod 512 , the locking rod 513 , the roller 514 , the linear bearing 515 , the plum blossom coupling 516 , and the tension adjuster 581 .

[0043] Example: Figures 1 to 8 As shown, the rail waist grinding device in this embodiment is used to grind the rail waist position of the rail 8 to ensure that its surface is clean and flat when installing or replacing the insulating joint or installing or replacing the rail insulating clamp.

[0044] Specifically, the rail waist grinding device in this embodiment includes a grinding head assembly 5, which is the main component of the device for realizing rail waist grinding, and its grinding end can contact the rail waist of the rail 8. The grinding head assembly 5 includes a load-bearing frame 51, on which a first movable nut 511 is provided, and a roller 514 is rotatably connected to one side of the load-bearing frame 51.

[0045] The transmission assembly 2 includes a grinding head locking frame consisting of a center frame 21, a first driving member 23 and a first transmission rod 24. The first transmission rod 24 is rotationally connected to the center frame 21. The first driving member 23 is a clamping handwheel, and its output end is connected to the first transmission rod 24. The first movable nut 511 is sleeved on the first transmission rod 24 and can move along the first transmission rod 24.

[0046] The support frame 1 is perpendicular to the waist of the rail 8 , the first transmission rod 24 is parallel to the support frame 1 , the center frame 21 is slidably connected to the support frame 1 , the support frame 1 is provided with a slide groove 14 , and the roller 514 is located in the slide groove 14 .

[0047] The lifting assembly 3 includes a second driving member 31, a second transmission rod 33, a second movable nut 34 and a first connecting plate 32. The second movable nut 34 is sleeved on the second transmission rod 33, and the second movable nut 34 is connected to the center frame 21. The first connecting plate 32 is connected to the support frame 1. The second driving member 31 is connected to the first connecting plate 32, and the output end of the second driving member 31 is connected to the second transmission rod 33.

[0048] When in use, the first driving member 23 drives the grinding head assembly 5 to move in the vertical direction of the rail 8 through the first transmission rod 24 and the first movable nut 511, and the second driving member 31 drives the center frame 21 to move away from or close to the rail 8 through the second transmission rod 33 and the second movable nut 34, thereby moving the grinding head assembly 5 away from or close to the rail 8; through the cooperation of the first driving member 23 and the second driving member 31 and the limiting of the roller 514, the grinding head assembly 5 can move along the slide groove 14, so that the grinding head assembly 5 can be retracted from the grinding position to the middle position of the support frame 1, thereby reducing the overall volume of the rail waist grinding device and reducing storage and transportation costs.

[0049] like Figure 4 As shown, the grinding head assembly 5 includes a grinding end capable of grinding the rail waist and a load-bearing frame 51, on which a first movable nut 511 is provided, and a roller 514 is rotatably connected to one side of the load-bearing frame 51. The load-bearing frame 51 is arranged relatively, and a first movable nut 511 is provided on the top of the load-bearing frame 51, and the first movable nut 511 is a toothless nut. A through hole is also provided on the side wall of the load-bearing frame 51, and a linear bearing 515 is provided in the through hole, and the linear bearing 515 is arranged parallel to the first movable nut 511. A limit rod 512 extending in the opposite direction is connected to the lever of the first movable nut 511, and adjacent limit rods 512 can be connected by a locking rod 513, and the end of the locking rod 513 can be sleeved on the limit rod 512, so that the lever cannot move, and then the grinding head assembly 5 is in a locked state, thereby ensuring the stability of the grinding head assembly 5 during grinding. The roller 514 is rotatably connected to the outer side of the load-bearing frame 51. The load-bearing frame 51 is connected to a second connecting plate 52 that is arranged opposite to the second connecting plate 52 , and one end of the second connecting plate 52 that is close to the rail 8 is connected to the grinding end.

[0050] The grinding head assembly 5 in this embodiment uses an abrasive belt to grind the waist of the rail 8. The abrasive belt can accurately fit the profile of the rail 8, and the grinding profile is smooth. At the same time, the grinding time is shorter than that of the grinding head grinder, and the grinding quality is better. In this embodiment, the grinding end of the grinding head assembly 5 includes a third connecting plate 55 arranged relatively, and the third connecting plate 55 extends toward the waist of the rail 8. The third connecting plates 55 are arranged relatively, and the third connecting plates 55 are connected with a grinding belt driving wheel 56, a grinding belt driven wheel 57 and a grinding belt tensioning wheel 58. The opposite side of the second connecting plate 52 is connected with a grinding motor 53, and the output end of the grinding motor 53 is connected to the gear assembly 54 through a plum blossom coupling 516, and the gear assembly 54 is connected to the grinding belt driving wheel 56, and the gear assembly 54 is rotatably connected to the second connecting plate 52. The driven wheel 57 and the tensioning wheel 58 are located near the rail waist. The outer side of the overall structure composed of the driving wheel 56, the driven wheel 57 and the tensioning wheel 58 is covered with a sanding belt (not shown). The sanding belt is approximately triangular in shape. The grinding motor 53 can drive the sanding belt to move, thereby grinding the rail waist. A baffle 59 is also connected between the third connecting plates 55. The baffle 59 is parallel to the sanding belt and is used to support the sanding belt.

[0051] In this embodiment, a tensioning adjuster 581 is further provided on the side wall of the third connecting plate 55, and the sanding belt tensioning wheel 58 is connected between the tensioning adjuster 581. The tensioning adjuster 581 can drive the sanding belt tensioning wheel 58 to move, thereby adjusting the tension of the sanding belt to make the sanding belt fit better with the waist of the rail.

[0052] Combination Figure 3 and Figure 8As shown, the center frame 21 is cross-shaped as a whole, wherein a pair of oppositely arranged side walls are connected to the connecting frame 22, and the other pair of oppositely arranged side walls are connected to the stopper 26. The connecting frame 22 is arranged parallel to the rail 8, and the first transmission rod 24 is rotatably connected to the two ends of the connecting frame 22, and the first transmission rod 24 passes through the stopper 26 and rotates with the stopper 26, and the stopper 26 is located in the middle of the first transmission rod 24. Both sides of the stopper 26 are provided with a first movable nut 511 sleeved on the first transmission rod 24, that is, the first transmission rod 24 is connected to the two grinding head assemblies 5. One side of one of the connecting frames 22 away from the center frame 21 is rotatably connected to a driving gear, and the output end of the first driving member 23 is connected to the driving gear and can drive the driving gear to rotate, and the end of the first transmission rod 24 is connected to a driven gear 221, and the driving gear is connected to the driven gear 221 through a chain 223, so that the first driving member 23 can drive the first transmission rod 24 to rotate. The first driving member 23 is a clamping hand wheel, which can be set to a circular shape. A gripping rod is vertically provided on the third handle, and the gripping rod is far away from the center of the third handle, so as to facilitate manual rotation. In addition to the manually operated clamping hand wheel, the first driving member 23 can also be set as a motor to reduce the work intensity. The first transmission rod 24 is a toothless transmission rod matched with the first movable nut 511, so that the first driving member 23 can drive the grinding head assembly 5 to move along the first transmission rod 24 to the direction close to the stopper 26 or away from the stopper 26. A tensioning gear 222 is also rotatably connected to the connecting frame 22, and the tensioning gear 222 is meshed with the chain 223 to ensure that the chain 223 is effectively tensioned. A guide rod 25 is also connected to the opposite side of the stopper 26, and the guide rod 25 is slidably connected to the linear bearing 515 of the load-bearing frame 51, and the guide rod 25 is arranged parallel to the first transmission rod 24. A first slider 27 is also provided on the side of the stopper 26 away from the center frame 21, and an arc groove is provided on the first slider 27.

[0053] like Figure 5As shown, the support frame 1 is flat as a whole and is arranged relatively. The support frame 1 is arranged vertically with the rail 8, and the first transmission rod 24 is parallel to the support frame 1, so that the grinding head assembly 5 can move parallel to the support frame 1. A slide groove 14 is provided on the support frame 1, and the roller 514 is located in the slide groove 14 and can move along the slide groove 14. The slide groove 14 is a through groove and is provided with a plurality of bends, which can limit the moving path of the grinding head assembly 5. Different slide grooves 14 can be set according to the grinding position, retracted position, and the maximum and minimum distances between the grinding head assemblies 5 of the grinding head assembly 5. A first slide rail 11 matching with the first slider 27 is provided on the opposite side of the support frame 1, and an arc-shaped protrusion matching with the arc-shaped groove is provided in the first slide rail 11, so that the first slider 27 can be stuck in the first slide rail 11 and can move along the first slide rail 11. A fourth connecting plate 12 is connected to the side of the support frame 1 away from the grinding head assembly 5, and the fourth connecting plate 12 extends in a direction away from the grinding head assembly 5. A running wheel 13 is connected between the fourth connecting plates 12, and the running wheel 13 abuts against the top of the rail 8, so that the rail waist grinding device can move on the rail 8. At the same time, a pressure plate is provided at at least one end of the running wheel 13 to prevent the running wheel 13 from derailing.

[0054] like Figure 6 As shown, the clamping assembly 7 is located on the side of the support frame 1 away from the grinding head assembly 5, and includes a clamping seat 72. The side of the clamping seat 72 close to the rail 8 is symmetrically hinged with a clamping claw 74, and the clamping claw 74 can rotate in the opposite direction. The side of the clamping claw 74 away from the rail 8 is provided with an abutment block 75, and the opposite side of the abutment block 75 is arranged in parallel. The side of the clamping seat 72 away from the rail 8 is rotatably connected with a connecting shaft 76, and the connecting shaft 76 is sleeved with a locking block 78 that can abut against the abutment block 75. The locking block 78 is approximately rectangular as a whole, and the abutment surface of the locking block 78 is arc-shaped. The end of the rotating shaft away from the rail 8 is connected to the first handle 77. The side of the clamping seat 72 close to the support frame 1 is connected with a second slider 73, and the second slider 73 is in the shape of a flat plate. The side wall of the support frame 1 is provided with a second slide rail 71 at a position corresponding to the second slider 73, and the second slide rail 71 is provided with a T-slot, and the second slider 73 slides in the second slide rail 71. The clamping jaw 74 moves to the position of the rail 8 through the slide rail, and the top of the rail 8 is located between the clamping jaws 74. The locking block 78 is abutted against the abutting block 75 by rotating the first handle 77, so that the clamping jaw 74 clamps the rail 8 to prevent the rail waist grinding device from moving. In addition, a fastener can be threadedly connected to the second slider 73, and the fastener is rotated to make the end of the fastener abut against the second slide rail 71, so that the second slider 73 and the second slide rail 71 are relatively locked.

[0055] like Figure 5As shown, a guide block 61 is connected to the side of the support frame 1 away from the grinding head assembly 5. An opening is provided at the end of the guide block 61. The guide block 61 is slidably connected to the slide bar 62 through the opening. The end of the slide bar 62 close to the rail 8 is connected to the universal wheel 6. A fastener is threadedly connected to the guide block 61 in the direction of the slide bar 62. The slide bar 62 is provided with threaded holes at positions close to both ends. The fasteners are connected to the threaded holes so that the universal wheel 6 can be located at different heights. When the rail waist grinding device needs to move on the ground, the universal wheel 6 is brought into contact with the ground through the slide bar 62 and fixed to the threaded hole through the fastener, so that the rail waist grinding device can move on the ground through the universal wheel 6; when the rail waist grinding device is grinding or in transportation or storage, the universal wheel 6 is raised to the end of the guide block 61 through the slide bar 62 and fixed to the threaded hole through the fastener, so as to reduce the overall volume of the rail waist grinding device. The end of the slide bar 62 away from the rail 8 is hinged with a second handle 63, and a limit block is provided at the hinge position of the second handle 63, so that the second handle 63 can be rotated up to 90°, and the second handle 63 extends away from the support frame 1. When the rail waist grinding device is in grinding work or in transportation and storage, the second handle 63 fits with the slide bar 62, thereby reducing the overall volume of the rail waist grinding device; when the rail waist grinding device needs to be transported, the second handle 63 can be rotated to 90°.

[0056] like Figure 7 As shown, the support frame 1 is connected to a side wheel frame 4 extending toward the adjacent rail 8, and the middle position of the side wheel frame 4 is hinged, for example: the middle position of the side wheel frame 4 is hinged by a folding hinge 42, so that the side wheel frame 4 can be folded to reduce the overall volume. The side wheel frame 4 is rotatably connected to one end away from the support frame 1 with a side wheel 41 that abuts against the adjacent rail 8, and the side wheel 41 has the same structure as the running wheel 13. The setting of the side wheel 41 makes the overall movement of the rail waist grinding device more stable.

[0057] like Figure 2 As shown, the second movable nut 34 of the lifting assembly 3 is a screw nut, and the second transmission rod 33 is a screw rod. The second movable nut 34 is connected to the middle position of the center frame 21. The first connecting plate 32 is connected between the support frames 1, and two first connecting plates 32 are provided, respectively located at the top and bottom of the support frame 1. The second transmission rod 33 is rotatably connected between the first connecting plates 32, and the second transmission rod 33 passes through the middle position of the center frame 21. The end of the second transmission rod 33 away from the grinding head assembly 5 is connected to the output end of the second driving member 31. The second driving member 31 can be set as a motor or as a fourth handle. The fourth handle has the same structure as the third handle and will not be repeated. The second driving member 31 can drive the center frame 21 to move along the first slide rail 11, thereby driving the grinding head assembly 5 to rise or fall.

[0058] When in use, the first driving member 23 enables the grinding head assembly 5 to move along the first transmission rod 24, and the second driving member 31 enables the grinding head assembly 5 to move along the first slide rail 11, so that the grinding head assembly 5 moves along the slide groove 14 through the cooperation of the first driving member 23 and the second driving member 31 and the limiting of the roller 514. When the grinding head assembly 5 needs to be retracted from the grinding position, the first driving member 23 and the second driving member 31 cooperate to make the grinding head assembly 5 move away from the rail 8 along the slide groove 14 first, and then continue to rise and gradually move toward the middle after avoiding the rail 8, until the grinding head assembly 5 no longer protrudes from the outside of the support frame 1, thereby reducing the overall volume of the rail waist grinding device and reducing storage and transportation costs.

[0059] Through the cooperation between the slide bar 62 and the universal wheel 6, the rail waist grinding device can be small in size and can also be moved.

[0060] By setting the clamping assembly 7, the rail waist grinding device can be relatively fixed to the rail 8, so that the grinding head assembly 5 can grind the rail waist position of the rail 8 when the device as a whole is fixed to the rail 8, and always keep it in the middle of the rail, thereby ensuring the accuracy of the grinding position; further, grinding with the sanding belt can significantly improve the grinding effect. In addition, when the sanding belt is constantly worn during the grinding operation, it can also be easily removed from the grinding head assembly 5 for simple and quick replacement, thereby improving the efficiency of the grinding operation.

[0061] In the specific implementation of this embodiment: each component of the device uses lithium batteries as a power source, which has little pollution and noise, and a portable generator can be used as a power source.

[0062] Although the above embodiments have described the concepts and embodiments of the purpose of the utility model in detail with reference to the accompanying drawings, ordinary technicians in this field can recognize that various improvements and modifications can still be made to the utility model without departing from the scope of the claims, so they are not described one by one here.

Claims

1. A rail waist grinding device, used for grinding the rail waist of a rail, characterized in that: The device includes: Grinding head assembly, transmission assembly, support plate, lifting assembly; The grinding end of the grinding head assembly can contact the waist of the rail, and the grinding head assembly includes a load-bearing frame, on which a grinding motor and a grinding belt wheel group are arranged, the grinding motor is connected to the grinding belt wheel group in a transmission manner, and the grinding belt wheel group is used to install a grinding belt; the load-bearing frame is provided with a first movable nut, and a roller is rotatably connected to one side of the load-bearing frame; The transmission assembly includes a support frame, a first driving member and a first transmission rod, the first transmission rod is rotatably connected to the support frame, the output end of the first driving member is connected to the first transmission rod, and the first movable nut is sleeved on the first transmission rod and can move along the first transmission rod; The support plate is perpendicular to the rail, the first transmission rod is parallel to the support plate, the support frame is slidably connected to the support plate, the support plate is provided with a slide groove, and the roller is located in the slide groove; the lifting assembly includes a second driving member, a second transmission rod, a second movable nut and a first connecting plate, the second movable nut is sleeved on the second transmission rod, and the second movable nut is connected to the support frame, the first connecting plate is connected to the support plate, the second driving member is connected to the first connecting plate, and the output end of the second driving member is connected to the second transmission rod.

2. The rail waist grinding device according to claim 1, characterized in that: The supporting frame is connected to connecting frames on opposite sides respectively, the first transmission rod is rotatably connected between the connecting frames on both sides, the end of the first transmission rod is connected to a driven gear, and the output end of the first driving member is matched with the driven gear through a chain.

3. The rail waist grinding device according to claim 1, characterized in that: The support frame is connected to blocks on two opposite sides, the first transmission rod passes through the blocks and forms a rotational fit with the blocks, a first slider is provided on the side of the block away from the support frame, and a first slide rail that cooperates with the first slider is provided on one side of the support plate; a sliding fit is formed between the first slider and the first slide rail.

4. The rail waist grinding device according to claim 3, characterized in that: A guide rod is connected to the opposite side of the stopper, and the guide rod is slidably connected to the load-bearing frame.

5. The rail waist grinding device according to claim 1, characterized in that: The support plate is connected to a clamping assembly on one side away from the grinding head assembly, and the clamping assembly includes a clamping seat, and a clamping claw is symmetrically hinged on the side of the clamping seat close to the rail, and an abutment block is provided on the side of the clamping claw away from the rail. A connecting shaft is rotatably connected to the side of the clamping seat away from the rail, and a locking block is sleeved on the connecting shaft and can abut against the abutment block.

6. The rail waist grinding device according to claim 5, characterized in that: The abutting surfaces of the locking block and the abutting block are in an arc shape, and a first handle is connected to one end of the rotating shaft away from the rail.

7. The rail waist grinding device according to claim 5, characterized in that: A second sliding block is connected to one side of the clamping seat close to the supporting plate, and a second sliding rail slidably connected to the second sliding block is provided on the side wall of the supporting plate.

8. The rail waist grinding device according to claim 1, characterized in that: A guide block is connected to the side of the support plate away from the grinding head assembly, the guide block is slidably connected to a slide rod, the guide block is fixed to the slide rod by a fastener, and a universal wheel is connected to the end of the slide rod close to the rail.

9. The rail waist grinding device according to claim 8, characterized in that: A second handle is hingedly connected to one end of the slide bar away from the rail.

10. The rail waist grinding device according to claim 1, characterized in that: The support plate is connected to a side wheel frame extending toward the adjacent rail, the middle position of the side wheel frame is hinged to form a foldable structure, and one end of the side wheel frame away from the support plate is rotatably connected to a side wheel abutting against the adjacent rail.

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