Axle box movable mounting device and using method thereof

Abstract

The invention provides an axle box moving mounting device and a using method thereof.The axle box moving mounting device comprises a base, a lower-layer base framework, an upper-layer base framework and a lifting mechanism, the lifting mechanism is fixed to the rear side of the base, the lower-layer base framework is connected with the lifting mechanism, and the upper-layer base framework is connected with the lower-layer base framework through a Z-shaped supporting arm; an upper-layer rotating platform is arranged on the upper-layer base framework, and a lower-layer rotating platform is arranged on the lower-layer base framework. Through the lower-layer base framework, the upper-layer base framework and the axle box unit placing frame, axle box units can be accurately and conveniently mounted and transported. By means of the lifting, rotating and moving functions, the labor intensity of workers is greatly reduced, it is guaranteed that the axle box units are not deviated or damaged in the installation process, and the working efficiency and safety are improved. The device can be folded for storage, and the storage space is saved.

Description

Technical Field

[0001] The present invention relates to the technical field of urban rail transit equipment, and more particularly to an axle box moving and installing device and a using method thereof. Background Art

[0002] The axle box swing arm type positioning structure widely used in subways and high-speed multiple units has the following advantages: it has a relatively high horizontal stiffness, and the vehicle has high stability; it has a relatively low vertical stiffness, which can improve the derailment safety and high-speed comfort of the vehicle, and is the best choice for urban rail transit express vehicles. To ensure the safety of passengers during riding and maintain the best state of the braking device, when the vehicle operation mileage reaches a certain mileage, according to the maintenance manual and the vehicle inspection process requirements, the axle box body must be inspected for flaws, the internal bearings must be replaced, and the consumable and vulnerable parts and grease must be replaced.

[0003] During the initial maintenance, limited by the lack of process equipment and the on-site operation environment, during maintenance, due to the lack of participation and use of auxiliary tooling equipment, the operator can only manually carry the assembled axle box components to the installation position, and then perform subsequent operations through the installation tooling. During the installation process, due to personnel cooperation problems, it is possible to bump the axle and the inner ring of the bearing. The bumping may cause debris to enter the enclosed axle box body, resulting in unnecessary damage or even scrapping of the wheel set. Moreover, there are large errors and high operation difficulties in personnel cooperation, resulting in an increase in unnecessary working hours and certain potential safety risks to the operators. The occurrence of the above damage situations will inevitably lead to an additional increase in maintenance costs, and the occurrence of accidental injuries to the operating personnel will further increase the risk of endangering the train operation safety. Summary of the Invention

[0004] The purpose of the present invention is to provide an axle box moving and installing device and a using method thereof, which ensure that the axle box unit does not shift or get damaged during the installation process, and improve work efficiency and safety.

[0005] According to the purpose of the present invention, the present invention provides an axle box moving and installing device, including a base, a lower base frame, an upper base frame, and a lifting mechanism. The bottom of the base is provided with base wheels, the lifting mechanism is fixed to the rear side of the base, the lower base frame is connected to the lifting mechanism, the upper base frame is connected to the lower base frame through a Z-shaped support arm, an upper rotating platform is provided on the upper base frame, and a lower rotating platform is provided on the lower base frame.

[0006] Further, the lifting mechanism is a hydraulic lifting mechanism or an electric lifting mechanism.

[0007] Further, one end of the Z-shaped support arm is rotatably connected to the lower base frame, and the other end of the Z-shaped support arm is connected to the upper base frame through a slide-rail type upper base wheel.

[0008] Further, axle box unit placement racks are respectively arranged on the upper rotating platform and the lower rotating platform.

[0009] Further, an axle box swing arm node support seat, a fixing pin for the axle box unit placement rack, a handle for the placement rack, and an axle box body stopper are fixed on the axle box unit placement rack.

[0010] Further, moving ball wheels for the placement rack are arranged at the lower part of the axle box unit placement rack.

[0011] Further, an extension connecting device is arranged between the base and the lower base frame, and the extension connecting device includes a connecting arm, a positioning block, and a connecting arm guide wheel.

[0012] Further, a fixing pin is arranged on the upper base frame, and the fixing pin is used for connecting with the base.

[0013] Further, the center of the upper rotating platform is rotatably connected to the center of the upper base frame, and the center of the lower rotating platform is rotatably connected to the center of the lower base frame.

[0014] According to another object of the present invention, the present invention provides a usage method of the above-mentioned axle box moving and installing device, including the following steps:

[0015] S1. During overhaul installation:

[0016] After determining the orientation for pushing out the axle box unit, adjust the orientations of the upper rotating platform and the lower rotating platform as required;

[0017] Move the upper rotating platform 150° through the Z-shaped support arm and place it on the ground to be at the same level as the lower rotating platform;

[0018] Arrange the axle box body placement racks on the upper rotating platform and the lower rotating platform in sequence, place the axle boxes on the axle box body placement racks, and then push the tooling into the operation station;

[0019] After using the lifting operating rod to lift the upper rotating platform and the lower rotating platform to an appropriate height, fit the axle box with the axle shaft, and move the axle box into the axle shaft installation position. After confirming that the installation is in place, use the lowering operating rod to lower the upper rotating platform and the lower rotating platform to an appropriate height, and then push out the tooling;

[0020] S2. Storage step:

[0021] After the installation work is completed, lower the base platform to the lowest position through the lifting mechanism of the tooling, push the tooling to the storage position, remove the axle box body placement rack for storage, lift the upper base frame and the upper rotating platform, and lift the upper base frame above the lower base frame along the movement track of the Z-shaped support arm for storage.

[0022] The technical solution of the present invention enables the axle box unit to be accurately and conveniently installed and transported through the lower base frame, the upper base frame, and the axle box unit placement rack. Its functions of lifting, rotating, and moving greatly reduce the labor intensity of workers, ensure that the axle box unit does not shift or get damaged during the installation process, and improve work efficiency and safety. At the same time, the device can be folded for storage, saving storage space, enhancing the operability and practicability of the equipment, and meeting the requirements of modern rail transit systems for precise installation and transportation. Description of the Drawings

[0023] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0024] Figure 1 It is a schematic structural diagram of an embodiment of the present invention;

[0025] Figure 2 It is a top view of an embodiment of the present invention;

[0026] Figure 3 It is a top view of the axle box unit placement rack of an embodiment of the present invention;

[0027] Figure 4 It is a front view of the axle box unit placement rack of an embodiment of the present invention;

[0028] Figure 5 It is a side view of the axle box unit placement rack of an embodiment of the present invention;

[0029] Figure 6 It is a schematic structural diagram of the extended connection device of an embodiment of the present invention;

[0030] Figure 7 It is a schematic structural diagram of the fixing pin of an embodiment of the present invention;

[0031] Figure 8 It is a schematic structural diagram of the rotation process of the Z-shaped support arm of an embodiment of the present invention;

[0032] Figure 9 It is a schematic structural diagram when the upper base frame and the lower base frame of an embodiment of the present invention are at the same height;

[0033] Figure 10 This is a top view of the unfolded state of the upper base frame and the lower base frame in the embodiment of the present invention;

[0034] Figure 11 This is a schematic structural diagram when loading the axle box unit placement rack in the embodiment of the present invention;

[0035] Figure 12 This is a schematic structural diagram in the lifting state of the embodiment of the present invention;

[0036] In the figure: 1, handrail; 1-1, fixed pin; 2: lifting mechanism; 3, base wheel;

[0037] 4, lower base frame; 4-1, connecting arm; 4-2, positioning block; 4-3, connecting arm guide wheel;

[0038] 5, axle box unit placement rack; 6, upper rotating platform; 7, Z-shaped support arm; 8, upper base frame; 9, slide rail type upper base wheel; 10, lower rotating platform; 11, extension connecting device; 12, axle box swivel arm node support seat; 13, axle box unit placement rack fixed pin; 14, placement rack handle; 15, axle box body stopper; 16, placement rack moving ball wheel. Detailed implementation manners

[0039] Next, the technical solutions of the present invention will be clearly and completely described in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0040] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0041] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present invention, "a plurality of" means two or more unless otherwise specifically defined. In addition, the terms "mounted", "connected" and "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0042] Embodiment 1

[0043] As Figures 1-12 shown

[0044] An axle box moving and mounting device includes a base, a lower base frame 4, an upper base frame 8 and a lifting mechanism 2, wherein: there are base wheels 3 provided at the bottom of the base, the number of the base wheels 3 is two, the two base wheels 3 are respectively located at the ends of the base, and a braking device is mounted on the base wheels 3.

[0045] An armrest 1 and a lifting mechanism 2 are fixed at the rear side of the base, the lower base frame 4 is connected with the lifting mechanism 2, and the lower base frame 4 and the upper base frame 8 can be driven to rise or fall through the lifting mechanism 2.

[0046] In this embodiment, the lifting mechanism 2 includes a raising operating rod and a lowering operating rod. The raising operating rod is used to control the rise of the lower base frame 4 and the upper base frame 8 for aligning with the axle box mounting position. The lowering operating rod is used to control the fall of the lower base frame 4 and the upper base frame 8 for the tooling to return to the loading and transportation state.

[0047] The upper base frame 8 is connected with the lower base frame 4 through a Z-shaped support arm 7. An upper rotating platform 6 is provided on the lower base frame 4, a lower rotating platform 10 is provided on the upper base frame 8. The upper rotating platform 6 is rotationally connected with the center of the upper base frame 8, and the lower rotating platform 10 is rotationally connected with the center of the lower base frame 4. The orientations of the upper rotating platform 6 and the lower rotating platform 10 can be adjusted according to the pushing direction of the axle box unit.

[0048] In this embodiment, the lifting mechanism 2 adopts a manual hydraulic lifting form, and with the lower base frame 4 as the basis, it drives the whole to complete the lifting action.

[0049] In this embodiment, the upper base frame 8 and the lower base frame 4 are connected by a Z-shaped support arm 7. There are two Z-shaped support arms 7, which are in a Z-shaped structure. The Z-shaped support arm 7 can move 150° to achieve the position movement of the upper base frame 8. Specifically, one end of the Z-shaped support arm 7 is rotatably connected to the lower base frame 4, and the other end of the Z-shaped support arm 7 is connected to the upper base frame 8 through a slide rail type upper base wheel 9. The slide rail type upper base wheel 9 is installed at the bottom of the upper base frame 8, and the number of the slide rail type upper base wheels 9 is two, which are located at the front end of the upper base frame 8 in the loading and transportation state.

[0050] When the device of the present invention is not in use, the upper base frame 8 and the lower base frame 4 are retracted by the Z-shaped support arm 7, and the whole tooling is in a folded state. The upper base frame 8 is located on the lower base frame 4, and the upper base frame 8 is slightly higher than the lower base frame 4. In this state, the folding part of the upper base frame 8 (i.e., the position near the armrest 1 on the left side of the upper base frame 8) and the armrest 1 are fixed by a fixing pin. Through the fixing pin 1-1, it can be ensured that the upper base frame 8 will not rotate under the action of gravity, and the stability of the upper base frame 8 and the lower base frame 4 is guaranteed.

[0051] When the device of the present invention is not in use, the upper base frame 8 and the lower base frame 4 are in a folded state.

[0052] As shown in the above figure, when in use, unlock the fixing pin 1-1 of the upper rotating platform, and by rotating the Z-shaped support arm 7, lower the upper base frame 8 so that the upper base frame 8 and the lower base frame 4 are at the same height, making the two platforms into a whole, which is convenient for the installation of the axle box. Finally, operate the lifting mechanism 2 to drive the upper base frame 8 and the lower base frame 4 to perform synchronous lifting actions.

[0053] An extension connecting device 11 is provided between the upper rotating platform 6 and the lower base frame 4. The extension connecting device 11 can manually connect the relative positions between the upper rotating platform 6 and the lower base frame 4, so that the upper rotating platform 6 can slide relative to the lower base frame 4.

[0054] Both the upper rotating platform 6 and the lower rotating platform 10 can rotate 360°. When the lower rotating platform 10 needs to rotate, first adjust the relative distance between the upper rotating platform 6 and the lower base frame 4 through the extension connecting device 11. According to needs, the relative position between the upper rotating platform 6 and the lower base frame 4 can be adjusted through the extension connecting device 11, so as to facilitate the rotation operation of the lower rotating platform 10.

[0055] Specifically, the extended connecting device 11 includes a connecting arm 4-1, a positioning block 4-2 and a connecting arm guide wheel 4-3. The connecting arm 4-1 of the extended connecting device 11 is inserted into the rear end of the upper rotating platform 6 to connect the upper rotating platform 6 and the lower base frame 4.

[0056] When the extended connecting device 11 specifically performs the action: unlock the positioning nut on the extended connecting device 11, so that the connecting arm 4-1 of the extended connecting device 11 moves horizontally until the connecting arm 4-1 is inserted into the upper rotating platform 6, and then tighten the positioning nut to perform lifting.

[0057] In this embodiment, two axle box unit placement racks 5 are placed on the upper rotating platform 6 and the lower rotating platform 10 respectively. The number of axle box unit placement racks 5 is four in total, with two placed on the upper rotating platform 6 and the lower rotating platform 10 respectively.

[0058] The axle box unit placement rack 5 is used to support the bottom of the axle box body and fix it for positioning. The axle box unit placement rack 5 can be stored separately when it is finished. Specifically, the upper surface of the axle box unit placement rack 5 is fixed with an axle box arm node support seat 12, an axle box unit placement rack fixing pin 13, a placement rack handle 14 and an axle box body stopper 15, and the lower part of the axle box unit placement rack 5 is provided with a placement rack moving ball wheel 16, wherein:

[0059] The rack handle 14 is used to transfer the rack to another position; the train axle box adopts a swing arm structure, and the axle box swing arm node support seat 12 can ensure that the tooling is in a horizontal position; the axle box unit rack fixing pin 13 ensures the stability of the rack on the upper rotating platform 6 and the lower rotating platform 10; the axle box body stopper 15 ensures that the axle box body is stably placed on the rack; the rack moving ball wheel 16 enables the rack to move on the rotating platform.

[0060] When the tooling of the present invention is in the storage state, the upper rotating platform 6 and the lower rotating platform 10 are in the upper and lower storage state, and the lower base frame 4 and the upper base frame 8 are supported by the Z-shaped support arm 7. When the tooling is in the transport axle box state, the lower end of the Z-shaped support arm 7 rotates 150°, and the upper base frame 8 and the upper rotating platform 6 can be moved to the ground and parallel to the lower rotating platform 6. At this time, the upper end of the Z-shaped support arm 7 moves to the other end of the upper base frame 8 along the horizontal moving direction, and the guide wheel of the upper base frame 8 acts as a moving wheel. The Z-shaped support arm 7 can return the upper rotating platform to the upper layer when it is finished, so that the tooling is easy to store.

[0061] When in use, the tooling can actuate 150° through the Z-shaped support arm 7 to lay the upper rotating platform 6 flat in front of the lower rotating platform 10 and make the slide-rail type upper base wheels 9 contact the ground. At this time, the upper rotating platform 6 and the lower rotating platform 10 are parallel. Place the axle box unit placement rack 5 on the platform. Each platform can carry at most two axle box unit placement racks 5, and place the axle box on the axle box unit placement rack 5.

[0062] The present invention has a liftable function, which can perfectly align the axle box unit with the installation height, eliminating the need for multiple people to lift the axle box unit for installation. The detachable axle box unit placement rack 5 has the function of sliding on the rotating platform, which can push the axle box unit to the installation position, saving the labor consumption and moving accuracy of moving the axle box unit on the tooling. The axle box unit placement rack 5 can fix the axle box unit, so that it will not deflect in position or rub against each other due to external factors at any time, preventing damage to the axle box and bearings.

[0063] The tooling of the present invention can flexibly adjust the height of the tooling lift platform according to the actual conditions of the operation site, and can realize the stable and fast rotation of the rotating platform to the predetermined installation position under the load state. This tooling has the characteristics of easy operation. Only two operators are required to complete the corresponding disassembly and assembly operation procedures. The upper limit of the number of axle box units carried by this tooling is the same as the number of axle boxes on one side of a single car body. A single tooling can complete the installation and transportation of 4 axles on one side at a time, and can be folded for storage, which is convenient and practical.

[0064] In this embodiment, the lifting mechanism adopts a hydraulic lifting mechanism. At the same time, the lifting mechanism can also adopt an electric lifting mechanism. By changing the current hydraulic operation of the lifting mechanism to electric drive operation, the labor consumption of personnel controlling the hydraulic lift can be saved.

[0065] When the tooling of the present invention is used for overhaul installation:

[0066] Before using the tooling, it is necessary to first observe the site conditions to determine whether the axle box unit is pushed out from the front end or the side of the tooling. After determining the pushing direction of the axle box unit, adjust the orientations of the upper rotating platform 6 and the lower rotating platform 10 as needed;

[0067] After confirming the above operations are completed, move the upper rotating platform 6 150° through the Z-shaped support arm 7 to the ground to be at the same level as the lower rotating platform 10;

[0068] Stack the axle box body placement racks 5 on the upper rotating platform 6 and the lower rotating platform 10 in sequence. Confirm that the fixing pins 13 of the axle box unit placement racks on the axle box body placement racks 5 are locked properly. Place the axle box on the axle box body placement rack 5, and place the axle box in the axle box body stop 15 and the axle box rotating arm joint support seat 12 to prevent the axle box from accidentally moving during movement. Then push the tooling into the operation station;

[0069] After the operator located on the outside uses the lifting operating rod to lift the upper rotating platform 6 and the lower rotating platform 10 to an appropriate height, two employees, one inside and one outside, observe the relative positions of the axle box and the axle. If there is a deviation, the upper rotating platform 6 or the lower rotating platform 10 can be further operated to move. After the installation position is confirmed to be correct, the axle box is fitted to the axle, and then the two employees cooperate with each other to move the axle box into the axle installation position. After confirming that the installation is in place, use the lowering operating rod to lower the upper rotating platform 6 and the lower rotating platform 10 to an appropriate height, then push out the tooling, and the operation is completed.

[0070] The storage steps of the tooling of the present invention:

[0071] After the installation work is completed, through the lifting mechanism 2 of the tooling, the base platform is placed at the lowest position. The tooling is pushed to the storage position by pushing the handrail 1. The axle box body placement rack 5 is removed for storage. The upper base frame 8 and the upper rotating platform 6 are lifted, and the upper base frame 8 is raised above the lower base frame 4 along the movement track of the Z-shaped support arm 7 for storage.

[0072] According to the needs, the present invention can carry up to four axle box units at most, and when stored, it does not need to occupy too much storage space. According to the design requirements, the frame for carrying the axle box unit of the tooling can be separated from the main body of the tooling for convenient distributed storage and free placement according to needs. The rotating platform of the tooling has a rotating function, so that the orientation of the axle box unit can be changed in angle, and the relative angle between the tooling and the axle can be adjusted according to the on-site environment.

[0073] To meet the installation requirements of the axle box unit, the tooling of the present invention has a self-lifting function, which can lift and lower the axle box rotating platform, and can lift the axle box unit to an appropriate height for installation. Since the load-bearing unit frame is an independent structure, it can slide on the rotating platform during the installation process of the axle box unit, saving a large amount of manpower during installation.

[0074] Compared with the previous installation and transportation operations of the axle box unit, it not only saves the number of workers, but also improves the operation time, and reduces the damage degree of the axle box unit and the bearing during installation and transportation, reducing the maintenance cost.

[0075] The primary object of the present invention is to solve the damage conditions of the outside, inside and bearings of the axle box unit caused by transportation and installation process problems, and completely eliminate the occurrence of such problems. And it optimizes the operation time and assembly personnel, reduces the man-hour consumption and potential risks of the operating personnel during the operation process. And the tooling can be folded and stored, saving the space occupied during storage.

[0076] The tooling of the present invention is applicable to electric passenger trains of the axle box unit on the mechanical running gear bogie in the urban rail transit system, aiming to improve the installation process of the axle box unit, simplify the operation steps and improve the work efficiency. Through the design and use of this tooling, the previous overhaul situation is changed, achieving the purpose of meeting the assembly process requirements and realizing cost reduction and efficiency increase.

[0077] The present invention is composed by connecting between the axle box body and the train wheel set. After ensuring that the workpiece is positioned at the specified station, it is convenient to use subsequent tooling equipment to complete the press-fitting process operation. At the same time, it meets the requirements of wide or narrow assembly sites, reduces the number of personnel and the intervention of large equipment during operation and improves the operation efficiency. It is easy to move and clean and maintain daily, reduces the axle box disassembly and installation time of the operators during the overhaul operation, effectively improves the overhaul process of axle box maintenance, and can be widely applied in various different models of vehicles.

[0078] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An axle box moving and mounting device, characterized in that, It includes a base, a lower base frame, an upper base frame and a lifting mechanism. The lifting mechanism is fixed to the rear side of the base. The lower base frame is connected to the lifting mechanism. The upper base frame is connected to the lower base frame by a Z-shaped support arm. An upper rotating platform is provided on the upper base frame, and a lower rotating platform is provided on the lower base frame.

2. The axle box moving and mounting device according to claim 1, wherein The lifting mechanism is a hydraulic lifting mechanism or an electric lifting mechanism.

3. The axle box moving and mounting device according to claim 1, characterized in that, One end of the Z-shaped support arm is rotatably connected to the lower base frame, and the other end of the Z-shaped support arm is connected to the upper base frame through a slide-rail type upper base wheel.

4. The axle box moving and mounting device according to claim 1, characterized in that Axle box unit placement racks are respectively placed on the upper rotating platform and the lower rotating platform.

5. The axle box moving and mounting device according to claim 4, characterized in that, Axle box swing arm node support seats, axle box unit placement rack fixing pins, placement rack pull handles and axle box body stoppers are fixed to the axle box unit placement rack.

6. The axle box moving and mounting device according to claim 4, characterized in that, Placement rack moving ball wheels are provided at the lower part of the axle box unit placement rack.

7. The axle box moving and mounting device according to claim 1, characterized in that, An extension connecting device is provided between the base and the lower base frame. The extension connecting device includes a connecting arm, a positioning block and a connecting arm guide wheel.

8. The axle box moving and mounting device according to claim 1, characterized in that A fixing pin is provided on the upper base frame, and the fixing pin is used for connecting the upper base frame to the base.

9. The axle box moving and mounting device according to claim 1, characterized in that The upper rotating platform is rotationally connected to the center of the upper base frame, and the lower rotating platform is rotationally connected to the center of the lower base frame.

10. The usage method of the axle box moving and installing device according to any one of claims 1-9, characterized in that, It includes the following steps: S1. During overhauls and installations: After determining the orientation for pushing out the axle box unit, adjust the orientations of the upper rotating platform and the lower rotating platform as needed. Move the upper rotating platform 150° through the Z-shaped support arm and place it on the ground at the same level as the lower rotating platform. Stack the axle box body placement racks on the upper rotating platform and the lower rotating platform in sequence. Place the axle boxes on the axle box body placement racks, and then push the tooling into the operation station. After using the lifting operating rod to lift the upper rotating platform and the lower rotating platform to an appropriate height, fit the axle box with the axle shaft and move the axle box into the axle shaft installation position. After confirming that the installation is in place, use the lowering operating rod to lower the upper rotating platform and the lower rotating platform to an appropriate height, and then push out the tooling. S2. Storage steps: After the installation work is completed, use the lifting mechanism to lower the base platform to the lowest position, push the tooling to the storage position, remove the axle box body placement racks for storage, lift the upper base frame and the upper rotating platform, and lift the upper base frame above the lower base frame along the movement track of the Z-shaped support arm for storage.

Images