An anti-drop auxiliary device for gearboxes used to replace the driving wheelsets of trains

Abstract

A gearbox anti-drooping auxiliary device for replacing the driving wheelset of a train, comprising a gearbox support part and driving wheelset support parts fixedly arranged at both ends of the gearbox support part. The gearbox support part comprises: a channel steel cross beam and a gearbox adjustment and lifting assembly arranged on the channel steel cross beam. The gearbox adjustment and lifting assembly is used to position and lift the gearbox to prevent the gearbox from prolapsing. The driving wheelset support part comprises: wheels mounting brackets fixedly connected to both ends of the channel steel cross beam and a track wheel assembly mounted on the wheels mounting brackets. The track wheel assembly is used to drive the driving wheelset of the train to move on the maintenance track. The present invention can hold the gearbox when replacing the driving wheelset of the train, ensuring that the head of the gearbox does not droop and does not rub against the ground during the movement of the driving wheelset, improving the maintenance efficiency, reducing the manpower, and being applicable to level crossings and tracks with trenches, with a wide range of applications.

Description

Technical Field

[0001] The present invention relates to the field of maintenance of urban rail transit vehicles, and particularly to a gearbox anti-drooping auxiliary device for replacing the driving wheel set of a train. Background Art

[0002] When designing a subway vehicle maintenance base, since a train generally consists of 6 carriages grouped into 2 units (3 carriages grouped into 1 unit), the 2 units are connected by a fully automatic coupler. Generally, when lifting the vehicle for maintenance, the 2 units are first separated by disconnecting the fully automatic coupler. For the need of lifting the vehicle for train maintenance, a car lifter for 3 carriages is generally installed. The car lifter can lift the vehicles of 1 unit at the same time for underbody maintenance operations. According to the form of the car lifter, it is divided into an underground car lifter and a ground car lifter. And the maintenance tracks of the base equipped with a ground car lifter basically all have a trench to facilitate the maintenance personnel to perform underbody maintenance.

[0003] With the ultra-large-scale development of the Shanghai subway and the continuous increase in the running kilometers of the train, once the wheel diameter wears or is turned to the specified limit size and other components installed on the wheel set assembly fail, when replacing the driving wheel set on the trench of the ground car lifter with a trench, since the gearbox cannot hold the fixed point and rotates and droops, this type of maintenance track cannot be normally maintained. Especially when the gearbox or axle box fails and it is not possible to empty it to other garages with an underground car lifter for maintenance, it brings serious pressure to vehicle maintenance at this time.

[0004] The main reason is that the driving wheel set assembly is equipped with a gearbox. As Figures 1 to 3 shown, one end of the gearbox 3 is sleeved on the wheel set shaft 2 of the driving wheel set 1, and the other end uses a suspension rod 5 to lift the gearbox to the designed height. The upper part of the suspension rod 5 is fixed on the bogie frame 4, and the lower part of the suspension rod 5 is fixed on the lower boss plane 6 of the gearbox 3 through a bolt 7. To replace the driving wheel set, the suspension rod connected to the gearbox must be removed. After removing the suspension rod, since one end of the gearbox is sleeved and fixed on the wheel set shaft, due to the center of gravity problem at the connection of the suspension rod at the other end of the gearbox, the gearbox rotates downward with the wheel set shaft as the center. When the driving wheel set assembly is pushed out to the top level crossing of the train track, the drooping gearbox rubs against the ground of the level crossing, resulting in abnormal maintenance.

[0005] When disassembling and moving the driving wheel set on the level crossing equipped with an underground car lifter, on the one hand, the driving wheel set moves along the track, and the end of the gearbox uses a single-wheel trailer to hold the installation position of the gearbox suspension rod and then slides on the ground of the level crossing to ensure that the head of the gearbox does not droop or rub against the ground during the movement on the level crossing and moves simultaneously along the running direction of the wheel set. However, when the driving wheel set is pushed from the level crossing to the track with a trench, the single-wheel trailer used on the level crossing can no longer be used.

[0006] In addition, if the inside of the gearbox and axle box installed on the driving wheel set assembly is mechanically jammed, it is even more impossible to use the ground car lift installed on the side of the pit for maintenance. Due to the installation position relationship of the driving wheel set on the train, it is also not possible to well use a forklift to transport the wheel set assembly out of the side of the train. According to the design data, the gearbox assembly weighs more than 360 kilograms. Even if one end is sleeved on the wheel axle, due to the special position relationship of the pit, the other end cannot be lifted by manpower and transported out from under the car body over a long distance, thus causing limitations in ground car lift maintenance and waste of equipment resources. Summary of the Invention

[0007] The present invention provides a gearbox anti-drooping auxiliary device for replacing the driving wheel set of a train, which can support the gearbox when replacing the driving wheel set of the train, ensure that the head of the gearbox does not droop and does not rub against the ground during the movement of the driving wheel set, improves the maintenance efficiency, reduces the manpower, and is applicable to level crossings and tracks with pits, and has a wide range of applications.

[0008] In order to achieve the above object, the present invention provides a gearbox anti-drooping auxiliary device for replacing the driving wheel set of a train, which includes a gearbox support part and driving wheel set support parts fixedly arranged at both ends of the gearbox support part;

[0009] The gearbox support part includes: a channel steel cross beam and a gearbox adjustment and lifting assembly arranged on the channel steel cross beam. The gearbox adjustment and lifting assembly is used to position and lift the gearbox to prevent the gearbox from prolapsing;

[0010] The driving wheel set support part includes: wheel mounting brackets fixedly connected to both ends of the channel steel cross beam and track wheel assemblies mounted on the wheel mounting brackets. The track wheel assemblies are used to drive the driving wheel set of the train to move on the maintenance track.

[0011] The gearbox adjustment and lifting assembly includes: an upper lifting bracket, an upper lifting bracket chassis, a lower bottom plate and lower support head screws. The upper lifting bracket chassis and the lower bottom plate are respectively installed on the upper surface and the lower surface of the channel steel cross beam through their respective mounting holes. The upper lifting bracket is arranged inside the upper lifting bracket chassis and is used to position the gearbox. The lower support head screws are installed inside the lower bottom plate and pass through the displacement holes on the channel steel cross beam to be positioned and connected with the upper lifting bracket, and are used to lift the gearbox.

[0012] The mounting holes on the upper lifting bracket chassis are elongated, the mounting holes on the lower bottom plate are elongated, and the displacement holes on the channel steel cross beam are elongated to enable the upper lifting bracket chassis and the lower bottom plate to move relative to the channel steel cross beam.

[0013] The described upper lifting bracket includes: a top plate and a support rod connecting the top plate. The upper surface of the top plate has a positioning head. The position and size of the positioning head match the suspension rod fixing holes of the gearbox, and are used to insert the positioning head into the suspension rod fixing holes. The lower end surface of the support rod in contact with the lower support head screw has a positioning hole, which is used to achieve positioning with the lower support head screw.

[0014] The chassis of the described upper lifting bracket has a guiding hole for installing the upper lifting bracket.

[0015] The described lower bottom plate has threaded holes for installing the lower support head screws.

[0016] The described lower support head screw includes a screw rod. The upper end surface of the screw rod in contact with the support rod of the upper lifting bracket has a positioning boss. The size of the positioning boss matches the size of the positioning hole of the support rod, so as to achieve the docking between the upper lifting bracket and the lower support head screw.

[0017] The main structure of the described wheel mounting bracket has a channel steel cross beam welding part and a track wheel assembly mounting part. The channel steel cross beam welding part is welded and fixed to both ends of the channel steel cross beam. The track wheel assembly mounting part is used to install the track wheel assembly.

[0018] The described track wheel assembly includes a wheel axle and a track wheel sleeved on the wheel axle. The size of the track wheel matches the maintenance track and is used to slide on the track synchronously with the wheel set assembly. Both ends of the wheel axle are installed in the track wheel assembly mounting part of the wheel mounting bracket.

[0019] The described driving wheel pair support part further includes: a wheel pair bracket, which is arranged on the wheel mounting bracket and fixedly connected to the channel steel cross beam. The body of the wheel pair bracket has an inclined surface to ensure no shaking after loading the driving wheel pair.

[0020] The gearbox anti - sagging auxiliary device provided by the present invention can hold the gearbox when replacing the driving wheel pair of the train, ensure that the head of the gearbox does not sag and does not rub against the ground during the movement of the driving wheel pair, improve the maintenance efficiency, reduce the manpower, and the present invention is applicable to both level crossings and tracks with trenches, and has a wide range of applications. Description of the Drawings

[0021] Figure 1 It is a schematic structural diagram of the driving wheel pair, gearbox and bogie frame in the background technology.

[0022] Figure 2 It is a schematic structural diagram of the gearbox in the background technology.

[0023] Figure 3 It is a schematic connection diagram of the gearbox and the bogie frame in the background technology.

[0024] Figure 4 It is a schematic diagram of the overall structure of the gearbox anti-drooping auxiliary device provided by the present invention.

[0025] Figure 5 It is a schematic diagram of the structure of the channel steel cross beam.

[0026] Figure 6 It is a schematic diagram of the structure of the upper lifting bracket chassis.

[0027] Figure 7 It is a schematic diagram of the structure of the lower bottom plate.

[0028] Figure 8 It is a schematic diagram of the structure of the upper lifting bracket.

[0029] Figure 9 It is a schematic diagram of the structure of the lower support screw.

[0030] Figure 10 It is a schematic diagram of the structure of the handle.

[0031] Figure 11 It is a schematic diagram of the structure of the wheel mounting bracket.

[0032] Figure 12 It is a schematic diagram of the structure of the track wheel assembly.

[0033] Figure 13 It is a schematic diagram of the structure of the wheel pair bracket.

[0034] Figure 14 It is a schematic diagram of the use of the gearbox anti-drooping auxiliary device provided by the present invention. Detailed implementation manners

[0035] The following is based on Figures 1 to 14 to specifically illustrate the preferred embodiments of the present invention.

[0036] As Figure 4 shown, the present invention provides a gearbox anti-drooping auxiliary device for replacing the driving wheel pair of a train, which includes a gearbox support part and driving wheel pair support parts fixedly arranged at both ends of the gearbox support part.

[0037] The gearbox support part includes: a channel steel cross beam 11 and a gearbox adjustment and lifting assembly arranged on the channel steel cross beam 11. The gearbox adjustment and lifting assembly is used to position and lift the gearbox to prevent the gearbox from prolapsing.

[0038] As Figures 4 to 9As shown in the figure, the gearbox adjusting lifting assembly includes: an upper lifting bracket chassis 12 correspondingly installed on the upper surface of the channel steel cross beam 11 and a lower bottom plate 13 on the lower surface of the channel steel cross beam 11. An upper lifting bracket 14 is arranged inside the upper lifting bracket chassis 12 for positioning the gearbox. Lower support head screws 15 are installed inside the lower bottom plate 13 and pass through the channel steel cross beam 11 to contact the upper lifting bracket 14 for lifting the gearbox.

[0039] In an embodiment of the present invention, as Figures 4 to 9 shown, the upper lifting bracket chassis 12 has mounting holes 1202, the lower bottom plate 13 has mounting holes 1302, and the channel steel cross beam 11 also has mounting holes 1102. Fasteners are used to fixedly install the upper lifting bracket chassis 12 and the lower bottom plate 13 onto the channel steel cross beam 11 respectively in an up-and-down corresponding manner through the mounting holes of each part. The mounting holes 1202 on the upper lifting bracket chassis 12 and the mounting holes 1302 on the lower bottom plate 13 are elongated, so that the upper lifting bracket chassis 12 and the lower bottom plate 13 can move relative to the channel steel cross beam 11. The upper lifting bracket chassis 12 has guide holes 1201 for installing the upper lifting bracket 14. The lower bottom plate 13 has threaded holes 1301 for installing the lower support head screws 15. As Figure 8 shown, the upper lifting bracket 14 includes a top plate 1401 and support rods 1402 connecting the top plate 1401. The upper surface of the top plate 1401 has a positioning head 1403. The position and size of the positioning head 1403 match those of Figure 2 the two M20 hanger fixing holes 10 on the convex platform plane 6 of the gearbox 3 in Figure 9 such that the positioning head 1403 can be inserted into the hanger fixing holes 10. The lower end face of the support rod 1402 in contact with the lower support head screws 15 has a positioning hole 1404 for positioning with the lower support head screws 15. As Figure 5As shown in the figure, displacement holes 1101 are provided at corresponding positions on the channel steel cross beam 11. The screw rod 1501 of the lower support screw 15 is connected to the threaded hole 1301 on the lower bottom plate 13. The screw rod 1501 further passes through the displacement hole 1101 on the channel steel cross beam 11 and is finally positioned and connected to the support rod 1402 of the upper lifting bracket 14 installed in the guiding hole 1201 of the upper lifting bracket chassis 12. By adjusting the rotation of the screw rod 1501, the height of the upper lifting bracket 14 can be adjusted. The displacement hole 1101 is also set to be elongated, so as to cooperate with the movement of the upper lifting bracket chassis 12 and the lower bottom plate 13 relative to the channel steel cross beam 11, so that the mutually positioned and connected upper lifting bracket 14 and the lower support screw 15 can also move freely in the displacement hole 1101.

[0040] As Figure 4 and Figure 9 shown, in another embodiment of the present invention, the gearbox support part further includes a handle 19, which is fixedly installed on the channel steel cross beam 11 through a clamping hole 1104 provided on the channel steel cross beam 11, facilitating daily transportation and hoisting.

[0041] As Figure 4 and Figures 11 to 13 shown, in one embodiment of the present invention, the driving wheel pair support part includes: wheel mounting brackets 16 fixedly connected to both ends of the channel steel cross beam 11, and track wheel assemblies 12 installed on the wheel mounting brackets 16.

[0042] As Figure 11 shown, the main body structure 1601 of the wheel mounting bracket 16 has a channel steel cross beam welding part 1602 and a track wheel assembly mounting part 1603. The channel steel cross beam welding part 1602 is welded and fixed to both ends of the channel steel cross beam 11, and the track wheel assembly mounting part 1603 is used for installing the track wheel assembly 12.

[0043] As Figure 12 shown, the track wheel assembly 12 includes a wheel axle 1702 and a track wheel 1701 sleeved on the wheel axle 1702. The outer shape of the track wheel 1701 is designed according to the outer shape dimensions of the steel rail and is used to slide synchronously on the track following the wheel pair assembly. Both ends of the wheel axle 1702 are installed in the track wheel assembly mounting part 1603 of the wheel mounting bracket 16, and the wheel axle 1702 is fixed by fasteners. In this embodiment, the fasteners include a ball bearing 1703 and a gasket 1704 provided on the outside of the wheel mounting bracket 16.

[0044] As Figure 4 and Figure 13As shown, in an embodiment of the present invention, the moving wheel pair support portion further includes: a wheel pair bracket 18, which is disposed on the wheel mounting bracket 16 and fixedly connected to the channel steel cross beam 11. The wheel pair bracket 18 includes: a bracket body 1801, a channel steel cross beam fixing portion 1802 and a support foot 1803 connecting the bracket body 1801. The bracket body 1801 has an inclined surface, and the inclined surface is designed according to the train semi-worn wheel diameter value (810 mm) to ensure no shaking after loading all sizes of wheel pair assemblies. The channel steel cross beam fixing portion 1802 has a fixing hole 1804, and at the corresponding position of the channel steel cross beam 11, there is also a fixing hole 1103. The channel steel cross beam fixing portion 1802 is clamped on the channel steel cross beam 11, and the contact surface 1805 is closely attached to the channel steel cross beam 11. The fixing hole 1804 on the channel steel cross beam fixing portion 1802 is aligned with the fixing hole 1103 on the channel steel cross beam 11, and the wheel pair bracket 18 and the channel steel cross beam 11 are connected by detachable screws (since when using an "external hexagon bolt" to pass through the fixing hole 1804 and the fixing hole 1103 on the channel steel cross beam 11 for fixing, the wrench interferes with the inner side of the plate of the channel steel cross beam fixing portion 1802 and cannot be used. Therefore, when fixing, a "socket head internal hexagon bolt" is used for fixing. The function of the hole 1806 is: after passing a lengthened internal hexagon wrench through the hole 1806 and then inserting it into the socket head of the "socket head internal hexagon bolt", when rotating the "socket head internal hexagon bolt" for fixing, it is not interfered by the surrounding workpieces.), and the support foot 1803 supports on the support surface 1604 of the wheel mounting bracket 16 (as Figure 11 shown), ensuring that when loading the wheel pair assembly, the 4 wheels are evenly stressed.

[0045] As Figure 14 shown, in an embodiment of the present invention, after uncoupling a train into 2 units (taking a 6-car formation as an example, each unit has 3 cars), before lifting the vehicle, prepare the ground jack to support the lifting positions of 3 cars, and appropriately raise the train (30 cm) so that the anti-dropping auxiliary device of the gearbox can be pushed under the gearbox of the motor car bogie that needs to be replaced along the rail without any interference with the vehicle bottom, and then lower the ground jack to the original state.

[0046] As Figure 2 and Figure 3 shown, after disassembling other accessories that need to be disassembled when replacing the moving wheel pair (such as the coupling between the motor and the gearbox, the axle box sensor, the primary suspension damper, etc.), then slowly remove the 2 M20 gearbox fixing bolts 7 at the lower part of the hanger rod 5 of the gearbox 3, so that the safety anti-dropping boss 8 on the upper part of the gearbox 3 contacts the safety baffle 9 on the bogie frame 4, and then push the gearbox anti-dropping auxiliary device provided by the present invention to directly below the fixing point of the hanger rod 5 of the gearbox 3.

[0047] Select three components with reasonable heights (upper lifting bracket 14, upper lifting bracket chassis 12, lower support screw 15). Screw the screw rod 1501 of the lower support screw 15 into the threaded hole 1301 of the lower bottom plate 13, and continue to screw it through the displacement hole 1101 on the channel steel cross beam 11. The positioning boss 1502 on the lower support screw 15 is aligned and fitted with the positioning hole 1404 of the upper lifting bracket 14 inside the upper lifting bracket chassis 12 placed on the upper surface of the channel steel cross beam 11. At this time, the four mounting holes 1302 on the lower bottom plate 13 are aligned with the four mounting holes 1202 on the upper lifting bracket chassis 12. Centering on the channel steel cross beam 11, use the four mounting holes 1102 on the channel steel cross beam 11 to pass four M10 knock-on screws from top to bottom through the mounting holes on the upper lifting bracket chassis 12, the channel steel cross beam 11, and the lower bottom plate 13 in sequence, and screw in the nuts until the contact surface is close to 1 - 2 mm. The center position of the contact surface for installing the gearbox suspension rods of different models is different from the distance to the inner side of the track. Ensure that when the suspension rod mounting holes 10 of the counterweight gearbox 3 are displaced left and right, the upper lifting bracket 14, the upper lifting bracket chassis 12, the lower bottom plate 13, and the lower support screw 15 move coaxially and synchronously with the four knock-on screws as the positioning points. Ensure that after appropriate displacement, the positioning head 1403 of the upper lifting bracket 14 can correctly align with the suspension rod mounting holes 10 of the gearbox. Screw in the lower support screw 15 again to confirm that the two positioning heads 1403 of the upper lifting bracket 14 are correctly aligned with the two M20 suspension rod hoisting holes 10 of the gearbox suspension rod 5, and tighten the four knock-on screws. Continue to screw in the lower support screw 15. At this time, the lower support screw 15 will enter the guiding hole 1201 of the upper lifting bracket chassis 12. After being fitted through its positioning boss 1502 and the positioning hole 1404 of the upper lifting bracket 14, it will push the upper lifting bracket 14 upward in the guiding hole 1201 of the upper lifting bracket chassis 12, and gradually lift the gearbox 3. After lifting until the safety anti-falling convex platform 8 of the gearbox is separated from the safety baffle 9 of the bogie frame, remove the safety baffle 9 on the bogie frame 4. Then, lift the gearbox 3 by the lower support screw 15 until the lower support screw 15 cannot rotate (this step ensures that when the gearbox is pushed out to the level crossing, the lower support screw 15 does not rub against the ground of the level crossing), so that the gearbox anti-falling auxiliary device supports the suspension rod mounting plane position of the gearbox and can move synchronously with the driving wheelset on the inspection track with a trench.

[0048] Lift the car body of one unit of three cars to a height at which the driving wheelset can be pushed out (100 cm from the rail surface), and push out the driving wheelset assembly to the level crossing. Use the crane in the depot to lift the driving wheelset assembly away. Re-lift the new driving wheelset assembly, fix the gearbox on the gearbox anti-falling auxiliary device, and then push it into the original removed position, and install it according to the reverse process steps. Note that when replacing the wheelset, the two wheelsets of one bogie should be replaced simultaneously.

[0049] Since the contact surfaces between the gearbox suspension rods of each model and the gearbox and their heights from the rail are different, through Figure 4 it is found that the upper lifting bracket chassis 12, the upper lifting bracket 14, and the lower stud 15 are divided into two groups, left and right. The height dimensions of the three components in these two groups are different. The reason is that due to different train models, the height dimensions of the plane of the suspension rod fixing holes 10 ( Figure 2 ) at the bottom of the gearbox from the upper surface of the rail are also different. The purpose of designing the lifting bracket chassis 12, the upper lifting bracket 14, and the lower stud 15 with different heights for each group is that each group can be used in combination to lift a gearbox of one train model into place. At the same time, it is also necessary to ensure that after the gearbox is lifted into place by the lower stud 15, when the driving wheel set is pushed along the rail to the level crossing ( Figure 14 ), the hexagonal screw head of the lower stud 15 does not rub against the ground of the level crossing. By analogy, if there are three or more types of train model gearboxes, then three or more components with different heights, namely the upper lifting bracket chassis 12, the upper lifting bracket 14, and the lower stud 15, need to be designed. In actual use, a set of the above three components with corresponding heights can be used for one train model. Considering other comprehensive factors such as other operations and interferences, the upper lifting bracket 14, the upper lifting bracket chassis 12, and the lower stud 15 are designed with two heights and used in combination. After holding the center of gravity position of the gearbox suspension rod, it has a certain range of descent and lifting adjustment. The main function is during disassembly, to ensure that after the gearbox suspension rod is disassembled and held by the safety hook (or safety stop block) installed on the bogie frame, the gearbox is appropriately lifted to separate the safety stop from the safety hook and remove the safety hook. Then the upper lifting bracket 14 holds the position of the suspension rod. When the gearbox is installed, it can be lifted above the lowest position of the safety hook on the bogie frame. After installing the safety hook, the safety stop of the gearbox is held by the safety hook. (Generally, when the normal wheel set wears to 770 mm, it is replaced, and the diameter of the newly replaced wheel set reaches 840 mm, with an up and down radius displacement of 35 mm).

[0050] The gearbox anti - sagging auxiliary device provided by the present invention can hold the gearbox when replacing the driving wheel set of the train, ensuring that the head of the gearbox does not sag and does not rub against the ground during the movement of the driving wheel set, improving the maintenance efficiency, reducing the manpower, and the present invention is applicable to both level crossings and tracks with trenches, having a wide range of applications.

[0051] Although the content of the present invention has been introduced in detail through the above - mentioned preferred embodiments, it should be recognized that the above description should not be considered as a limitation of the present invention. After those skilled in the art have read the above content, various modifications and substitutions to the present invention will be obvious. Therefore, the protection scope of the present invention should be defined by the appended claims.

Claims

1. A gearbox anti - sag auxiliary device for replacing the driving wheelset of a train, characterized in that It includes a gearbox support part and driving wheel pair support parts fixedly arranged at both ends of the gearbox support part; The gearbox support part includes: a channel steel cross beam and a gearbox adjustment and lifting assembly arranged on the channel steel cross beam. The gearbox adjustment and lifting assembly is used to position and lift the gearbox to prevent the gearbox from prolapsing; The driving wheel pair support part includes: wheel mounting brackets fixedly connected to both ends of the channel steel cross beam and track wheel assemblies mounted on the wheel mounting brackets. The track wheel assemblies are used to drive the driving wheel pairs of the train to move on the maintenance track; The track wheel assembly includes a wheel axle and track wheels sleeved on the wheel axle. The sizes of the track wheels match the maintenance track and are used to slide on the track synchronously with the wheel pair assembly. Both ends of the wheel axle are installed in the track wheel assembly installation parts of the wheel mounting brackets; The gearbox adjustment and lifting assembly includes: an upper lifting bracket, an upper lifting bracket chassis, a lower bottom plate and lower stud bolts. The upper lifting bracket chassis and the lower bottom plate are respectively installed on the upper surface and the lower surface of the channel steel cross beam through their respective mounting holes. The upper lifting bracket is arranged inside the upper lifting bracket chassis and is used to position the gearbox. The lower stud bolts are installed inside the lower bottom plate and pass through the displacement holes on the channel steel cross beam to be positioned and connected with the upper lifting bracket, and are used to lift the gearbox; The mounting holes on the upper lifting bracket chassis are elongated, the mounting holes on the lower bottom plate are elongated, and the displacement holes on the channel steel cross beam are elongated to enable the upper lifting bracket chassis and the lower bottom plate to move relative to the channel steel cross beam; The upper lifting bracket includes: a top plate and support rods connecting the top plate. The upper surface of the top plate has a positioning head. The position and size of the positioning head match the hanging rod fixing holes of the gearbox and are used to insert the positioning head into the hanging rod fixing holes. The lower end surfaces of the support rods in contact with the lower stud bolts have positioning holes for positioning with the lower stud bolts; The lower stud bolt includes a screw rod. By rotating the adjusting screw rod, the height of the upper lifting bracket is adjusted.

2. The gearbox anti-drop auxiliary device for replacing the driving wheelset of a train according to claim 1, characterized in that, The upper lifting bracket chassis has guide holes for installing the upper lifting bracket.

3. The gearbox anti-droop auxiliary device for replacing the driving wheelset of a train according to claim 2, characterized in that The lower bottom plate has threaded holes for installing the lower stud bolts.

4. The gearbox anti-drooping auxiliary device for replacing the driving wheel set of a train according to claim 3, characterized in that The upper end surface of the screw rod in contact with the support rod of the upper lifting bracket has a positioning boss. The size of the positioning boss matches the size of the positioning hole of the support rod to achieve the docking of the upper lifting bracket and the lower stud bolt.

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