Coupling assembly method for built-in axle box bogie drive device

Abstract

The present invention provides a coupling assembly method for a bogie drive device with an internal axle box, comprising: adjusting a gearbox to a horizontal state and measuring a first height of the gearbox from a rail surface; placing a traction motor horizontally on a lifting support vehicle and measuring a second height of the traction motor from the rail surface; adjusting the output shaft of the traction motor and the input shaft of the gearbox to a consistent height based on the difference between the second height and the first height; measuring the axial spacing between the traction motor and the gearbox, and determining the thickness of a gasket based on the axial spacing; fixedly connecting the traction motor and the gearbox via various elastic rubber nodes, hoisting the entire bogie onto a runner tooling, and rotating the wheelset so that the various flange connection holes of the coupling are sequentially rotated to the bottom of the bogie for threaded connection. The coupling assembly method for a bogie drive device with an internal axle box provided by the present invention can improve the assembly alignment accuracy of the traction motor and the gearbox.

Description

Technical Field

[0001] The invention belongs to the technical field of bogie assembly, and in particular relates to a coupling assembly method of a bogie drive device with a built-in axle box. Background Art

[0002] The development of rail vehicles increasingly emphasizes lightweight, low energy consumption, low wheel-rail force, low wear, and low noise. The bogie with built-in axlebox moves the axlebox from the outside to the inside of the wheelset, shortening the axle and reducing the frame size, making the bogie compact and reducing the unsprung mass, which is beneficial to reducing wheel-rail wear and reducing the curve radius, and can provide customers with high-efficiency products for energy conservation and carbon reduction.

[0003] The structure of the built-in axle box bogie is relatively compact, and the assembly space of the drive device is small. In order to arrange the drive device under the limitation of lateral space, the traction motor and the gearbox need to be fixed through four elastic nodes, and the coupling is hidden and assembled between the traction motor and the gearbox, thereby limiting the assembly and measurement space for the coupling.

[0004] Since it is impossible to ensure the alignment accuracy of the traction motor and the gearbox through measurement and adjustment, the only option is to rely on the connection accuracy and machining accuracy of the four elastic nodes. However, this method is not sufficient to ensure the assembly accuracy of the coupling, resulting in further loss of the coupling's displacement ability, which is already small, and thus affecting the normal operation of the bogie. Therefore, how to achieve precise alignment of the traction motor and gearbox through measurement and adjustment while reducing the difficulty of assembling the coupling is a difficult problem that urgently needs to be solved in the industry. Summary of the Invention

[0005] An embodiment of the present invention provides a coupling assembly method for a bogie drive device with a built-in axle box, aiming to improve the assembly alignment accuracy of a traction motor and a gearbox and enhance the displacement capability of the coupling.

[0006] To achieve the above objectives, the present invention adopts the following technical solutions: First, a method for assembling a coupling of a bogie drive device with an internal axle box is provided. The bogie drive device with an internal axle box includes a traction motor and a gearbox connected transversely to the inside of the bogie, and a coupling with its ends connected to the output shaft of the traction motor and the input shaft of the gearbox, respectively. The traction motor and the gearbox are fixedly connected via a plurality of elastic rubber nodes distributed in an array. The coupling assembly method includes:

[0007] Step S100: supporting a hanger of the gearbox assembled on the axle, adjusting the support height of the hanger to make the gearbox reach a horizontal state, and measuring a first height of the gearbox from the rail surface;

[0008] Step S200: horizontally placing the traction motor on a lifting support vehicle capable of traveling along the rail surface, measuring a second height between the traction motor and the rail surface, and adjusting the support height of the lifting support vehicle based on the difference between the second height and the first height so that the output shaft of the traction motor and the input shaft of the gearbox are at the same height from the rail surface;

[0009] Step S300, measuring the axial distance between the traction motor and the gearbox, and determining the thickness of the gasket according to the axial distance;

[0010] In step S400, the lifting support vehicle is pushed to bring the traction motor close to the gearbox, and the traction motor and the gearbox are fixedly connected through various elastic rubber nodes. The bogie is hoisted as a whole onto the runner tooling, and the various flange connection holes of the coupling are rotated to the bottom of the bogie in turn by rotating the wheelset for screw connection.

[0011] In a possible implementation, step S100 includes:

[0012] Step S101: supporting the boom with a rotary wheel supported on a rail surface, wherein the rotary wheel is provided with a plurality of first adjustment pads supported below the boom;

[0013] Step S102: Measure a first height H1 of a first measuring point on the side of the gearbox away from the boom from the rail surface, and obtain a first installation height error value ΔH of the gearbox based on the first measured height H1. A1 ;

[0014] Step S103: Measure a second height H2 of the second measuring point on the side of the gearbox close to the boom from the rail surface, and obtain a second installation height error value ΔH of the gearbox based on the second measured height H2. A2 ;

[0015] Step S104, adjusting the second measured height value H2 by adding or removing the first adjustment pad so that the first installation height error value ΔH A1 and the second installation height error value △H A2 Satisfy: -0.5mm≤△H A1 -△H A2 ≤+0.5mm;

[0016] Step S105 : Acquire a first height according to the first measured height value H1 and / or the second measured height value H2 .

[0017] In some embodiments, the theoretical height of the first measuring point from the rail surface is A1, ΔH A1 =H1-A1; The theoretical height of the second measuring point from the rail surface is A2. Adjust the second measuring height value H2 by adding or removing the first adjustment pad until it satisfies: A2+△H A1 -0.5mm≤H2≤A2+△HA1 +0.5mm.

[0018] In some embodiments, step S200 includes:

[0019] Step S201: Place the traction motor on the lifting support vehicle and measure a third measured height value H3 of a third measuring point near one axial end of the traction motor from the rail surface, and a fourth measured height value H4 of a fourth measuring point near the other axial end of the traction motor from the rail surface; wherein the vertical design distances of the third and fourth measuring points from the center of the output shaft of the traction motor are both H5, and the vertical design distance of the first measuring point from the center of the input shaft of the gearbox is H6;

[0020] Step S202: Add a second adjustment pad below one end of the traction motor to adjust the height difference ΔH between the two ends of the traction motor and the rail surface. B1 Satisfy: -0.5mm≤△H B1 =H4-H3≤+0.5mm, so that the traction motor is in a horizontal state;

[0021] In step S203, the height of the output shaft of the traction motor and the input shaft of the gearbox from the rail surface is made consistent by adjusting the support height of the lifting support vehicle or by adding or removing second adjustment pads of equal thickness at the lower ends of the axial ends of the traction motor until the condition: H3+H5=H1+H6±0.5mm is met.

[0022] For example, H5=H6, -0.5mm≤△H=H1-H3≤+0.5mm, where △H is the height difference between the output shaft center of the traction motor and the input shaft center of the gearbox and the rail surface.

[0023] In a possible implementation, step S300 includes:

[0024] Step S301, measuring a first distance L1 between an end face of an input shaft of a gearbox and an end face of a rubber bushing of an elastic rubber node, and measuring a second distance L2 between an end face of an output shaft of a traction motor and an end face of a connection seat of the elastic rubber node;

[0025] Step S302 , calculating the axial distance L=L1−L2 between the end face of the input shaft of the gearbox and the end face of the output shaft of the traction motor;

[0026] Step S303 : Calculate the thickness D of the gasket that needs to be added based on the axial design dimension L0 of the coupling, where L-L0-0.5mm≤D≤L-L0+0.5mm.

[0027] In some embodiments, the processing and assembly tolerances are controlled so that the first distance L1 is a positive difference and the second distance L2 is a negative difference, thereby making L<L0. In step S400, a gasket with a thickness of D is clamped between the end face of the rubber bushing and the end face of the connecting seat.

[0028] For example, in step S400, before hoisting the entire bogie onto the runner tooling, the process further includes: limiting a tie spring of the bogie to a no-load state by a pull rod.

[0029] For example, the wheel tooling includes two groups of support rollers, which are used for rolling support directly below the two groups of wheel pairs of the bogie, and each group of support rollers includes at least two rollers.

[0030] Furthermore, a trench suitable for operators to enter is provided between the two groups of support rollers, and the trench is located directly below the coupling.

[0031] The beneficial effects of the coupling assembly method of the built-in axle box bogie drive device provided by the present invention are as follows:

[0032] Compared with the prior art, the coupling assembly method of the bogie drive device with a built-in axle box of the present invention, before assembling the traction motor to the bogie, first adjusts the gearbox to a horizontal state by adjusting the support height of the boom, then adjusts the traction motor placed horizontally on the lifting support vehicle to be consistent with the height of the gearbox, and then determines the thickness of the gasket by measuring the distance between the end face of the output shaft of the traction motor and the end face of the input shaft of the gearbox. Since the heights of the two have been adjusted and aligned, it is only necessary to move the lifting support vehicle to smoothly align and connect the various elastic rubber nodes, so that the output shaft of the traction motor and the input shaft of the gearbox are completely axially aligned. At the same time, the axial spacing between the traction motor and the gearbox is ensured to match the length of the coupling by clamping the gasket. Finally, the bogie with the gearbox and traction motor connected is hoisted onto the runner tooling, and the coupling is driven to rotate by rotating the wheelset. Without moving the bogie, the various flange connection holes of the coupling can be rotated to the bottom of the bogie in sequence, thereby facilitating screw connection and fixation of the coupling.

[0033] Since the traction motor and gearbox are measured and adjusted before assembly to ensure the relative height and lateral (i.e. axial) dimensions between the two, on this basis, it is only necessary to ensure the longitudinal dimensions of the traction motor and gearbox through the connection of each elastic rubber node to meet the positioning accuracy requirements. This not only reduces the dependence on processing accuracy, but also reduces the assembly difficulty and avoids the loss of the coupling's displacement ability due to assembly errors, thereby improving the coupling assembly accuracy of the built-in axle box bogie drive device. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1A schematic structural diagram of an internal axle box bogie drive device to which the coupling assembly method for the internal axle box bogie drive device provided in an embodiment of the present invention is applicable;

[0035] Figure 2 A schematic diagram of leveling measurement of a gearbox in a coupling assembly method for a bogie drive device with an internal axle box provided in an embodiment of the present invention;

[0036] Figure 3 A schematic diagram of leveling measurement of a traction motor in accordance with a coupling assembly method for a built-in axle box bogie drive device according to an embodiment of the present invention;

[0037] Figure 4 A schematic diagram of the state of tightening the coupling on the runner tooling in the coupling assembly method of the built-in axle box bogie drive device provided by an embodiment of the present invention;

[0038] Figure 5 Schematic diagram of the tightening sequence of the flange connection holes of the coupling in an embodiment of the present invention.

[0039] In the figure: 10, traction motor; 11, third measuring point; 12, fourth measuring point; 13, second adjusting pad; 20, gearbox; 21, boom; 22, first measuring point; 23, second measuring point; 30, coupling; 40, elastic rubber node; 41, rubber bushing; 42, connecting seat; 50, rail surface; 60, lifting support vehicle; 70, rotary wheel; 71, first adjusting pad; 80, support roller; 81, trench; 90, bogie; 91, wheelset. DETAILED DESCRIPTION

[0040] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0041] It should be noted that when an element is referred to as being "disposed on" another element, it may be directly on the other element or indirectly on the other element. It should be understood that the terms "length", "width", "upper", "lower", "front", "back", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying 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 cannot be understood as limiting the present invention. The terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "multiple" and "several" mean two or more, unless otherwise clearly and specifically defined.

[0042] Please also refer to Figure 1 and Figure 2 The assembly method of the coupling 30 of the built-in axle box bogie drive device provided by the present invention is now described. The method of assembling the coupling 30 of the built-in axle box bogie drive device includes a traction motor 10 and a gearbox 20 connected transversely to the inside of the bogie 90, and a coupling 30 whose ends are respectively connected to the output shaft of the traction motor 10 and the input shaft of the gearbox 20; the traction motor 10 and the gearbox 20 are fixedly connected via a plurality of elastic rubber nodes 40 distributed in an array; the assembly method of the coupling 30 includes:

[0043] Step S100: supporting the suspension rod 21 of the gear box 20 assembled on the axle, adjusting the support height of the suspension rod 21 so that the gear box 20 reaches a horizontal state, and measuring a first height of the gear box 20 from the rail surface 50;

[0044] Step S200: The traction motor 10 is horizontally placed on a lifting support vehicle 60 capable of traveling along the rail surface 50. A second height between the traction motor 10 and the rail surface 50 is measured. The support height of the lifting support vehicle 60 is adjusted based on the difference between the second height and the first height so that the output shaft of the traction motor 10 and the input shaft of the gearbox 20 are at the same height from the rail surface 50.

[0045] Step S300, measuring the axial distance between the traction motor 10 and the gearbox 20, and determining the thickness of the gasket according to the axial distance;

[0046] In step S400, the lifting support vehicle 60 is pushed to bring the traction motor 10 close to the gear box 20, and the traction motor 10 and the gear box 20 are fixedly connected through various elastic rubber nodes 40. The bogie 90 is hoisted as a whole onto the turntable tooling, and the various flange connection holes of the coupling 30 are rotated in turn to the bottom of the bogie 90 for screw connection by rotating the wheelset 91.

[0047] It should be noted that for the bogie with an internal axle box, the gear box 20 and the axle are connected by a through-box transmission. This connection relationship, combined with the connection between the upper boom 21 and the hanging point of the bogie 90, fixes the gear box 20. Therefore, when the axle side height of the gear box 20 is fixed, the gear box 20 can be rotated around the axle by adjusting the support height of the boom 21 until it reaches a horizontal state.

[0048] The elastic rubber node 40 forms a transverse connection between the traction motor 10 and the gearbox 20. The rubber bushing 41 of the elastic rubber node 40 is press-fitted onto the flange of the gearbox 20, and the connecting seat 42 is fixedly connected to the traction motor 10. The core shaft of the connecting seat 42 passes through the rubber bushing 41 to form a joint. If the traction motor 10 and the gearbox 20 do not match in height, connecting the elastic rubber node 40 is very difficult. After connection, one or more elastic rubber nodes 40 may be deformed, affecting assembly accuracy and increasing coaxiality deviation between the output shaft of the traction motor 10 and the input shaft of the gearbox 20. In this embodiment, by leveling and adjusting the traction motor 10 and the gearbox 20 to match their heights, the connecting seat 42 of each elastic rubber node 40 can be simultaneously axially aligned with the corresponding rubber bushing 41 by simply moving the traction motor 10 horizontally. This not only greatly reduces the difficulty of assembly, but also improves the coaxiality between the output shaft of the traction motor 10 and the input shaft of the gearbox 20 after assembly, thereby ensuring that the radial displacement capability of the coupling 30 meets the requirements after connection.

[0049] The two halves of the coupling 30 are respectively crimped and fixed to the output shaft of the traction motor 10 and the input shaft of the gearbox 20. Since the displacement ability of the coupling 30 comes from the movable connection between the two halves and the shaft (which can be understood as a ball joint connection), it is impossible to obtain precise dimensions between the two halves. Therefore, by pre-measuring the distance between the two connecting end faces of the traction motor 10 and the gearbox 20, combined with the designed axial dimensions of the coupling 30 itself (which can also be measured after the two halves are screwed and fixed), the thickness of the gasket can be determined, thereby ensuring that the axial displacement ability of the coupling 30 after the two ends are fixed meets the requirements by clamping the gasket, thereby reducing the requirements for the structure of the elastic rubber node 40 used to connect the traction motor 10 and the gearbox 20 and the processing accuracy requirements of the elastic rubber node 40 itself.

[0050] Compared with the prior art, the assembly method of the coupling 30 of the built-in axle box bogie drive device provided in this embodiment is different from that in the prior art. Since the traction motor 10 and the gear box 20 are measured and adjusted before assembly to ensure the relative height and lateral (i.e., axial) dimensions therebetween, it is only necessary to ensure the longitudinal dimensions of the traction motor 10 and the gear box 20 through the connection of each elastic rubber node 40 to meet the positioning accuracy requirements. This not only reduces the dependence on processing accuracy, but also reduces the assembly difficulty and avoids the loss of displacement ability of the coupling 30 due to assembly errors, thereby improving the assembly accuracy of the coupling 30 of the built-in axle box bogie drive device.

[0051] In some embodiments, see Figure 2 , step S100 includes:

[0052] In step S101 , the suspension rod 21 is supported by a rotary wheel 70 supported on the rail surface 50 . A plurality of first adjustment pads 71 ​​supported below the suspension rod 21 are sleeved on the rotary wheel 70 .

[0053] The use of a rotary wheel 70 to support the boom 21 can ensure that the rotary wheel 70 can move with the lifting support vehicle 60 when it moves on the rail surface 50, thereby ensuring the stable support state of the boom 21. Specifically, the rotary wheel 70 has an upwardly extending stepped shaft, and the small diameter section of the stepped shaft is passed through the hole of the boom 21. The step surface of the stepped shaft supports the bottom surface of the boom 21. The first adjustment pad 71 is sleeved on the small diameter section of the stepped shaft and is located below the boom 21. In order to facilitate disassembly and adjustment of the quantity, the first adjustment pad 71 can be a U-shaped or semi-annular opening pad.

[0054] Step S102: Measure a first measured height H1 of a first measuring point 22 on the side of the gearbox 20 away from the boom 21 from the rail surface 50, and obtain a first installation height error value ΔH of the gearbox 20 based on the first measured height H1. A1 .

[0055] It should be understood that after the gear box 20 and the axle are assembled, there will inevitably be an assembly dimensional tolerance between the two. This dimensional tolerance causes a deviation between the actual height of the gear box 20 and the theoretical height and is not adjustable. On the side of the gear box 20 away from the boom 21, that is, the side where the gear box 20 cooperates with the axle, the first installation height error value of this side is first determined, and this value can be used as a reference value for adjusting the horizontal state of the gear box 20.

[0056] Step S103: Measure the second height H2 of the second measuring point 23 of the gearbox 20 close to the boom 21 from the rail surface 50, and obtain the second installation height error value ΔH of the gearbox 20 according to the second measured height H2. A2 .

[0057] It should be understood that the first measuring point 22 and the second measuring point 23 can be ribs or recessed points or other marking structures provided on the housing of the gear box 20. By measuring the vertical distance value between the second measuring point 23 and the rail surface 50, the deviation of the theoretical size of the second measuring point 23 and the rail surface 50, that is, the second installation height error value, can be obtained.

[0058] Step S104: adjust the second measured height value H2 by adding or removing the first adjustment pad 71 so that the first installation height error value ΔH A1 and the second installation height error value △H A2 Satisfy: -0.5mm≤△H A1 -△H A2 ≤+0.5mm.

[0059] In this embodiment, the single layer thickness of the first adjustment pad 71 is less than or equal to 1 mm. The smaller the single layer thickness of the first adjustment pad 71, the higher the adjustment accuracy. Considering the assembly accuracy requirements, by increasing or decreasing the number of first adjustment pads 71, the second installation height error value and the first installation height error value can both reach the installation accuracy requirement range of ±0.5 mm. Therefore, it is preferred to use a first adjustment pad 71 with a thickness of 1 mm.

[0060] Step S105 : Acquire a first height according to the first measured height value H1 and / or the second measured height value H2 .

[0061] The first height is the vertical distance between the gearbox 20 and the rail surface 50, which can be specifically understood as the vertical distance between the center of the input shaft of the gearbox 20 and the rail surface 50. The first measured height value is the vertical distance between the first measuring point 22 and the rail surface 50, and the second measured height value is the vertical distance between the second measuring point 23 and the rail surface 50. Since the vertical distances between the first measuring point 22 and the second measuring point 23 and the center of the input shaft of the gearbox 20 are both known fixed values, the first height can be obtained by adding the first measured height value to the vertical distance between the first measuring point 22 and the center of the input shaft of the gearbox 20, or by adding the second measured height value to the vertical distance between the second measuring point 23 and the center of the input shaft of the gearbox 20. Of course, to improve accuracy, the first measured height value and the second measured height value can also be combined, and the average of the two sums can be used as the first height.

[0062] Specifically, in this embodiment, the theoretical height value of the first measuring point 22 from the rail surface 50 is A1, ΔH A1 =H1-A1; The theoretical height value of the second measuring point 23 from the rail surface 50 is A2. The second measuring height value H2 is adjusted by increasing or decreasing the number of the first adjustment pads 71 ​​until the following condition is met: A2+△H A1 -0.5mm≤H2≤A2+△H A1 +0.5mm.

[0063] It should be understood that the vertical distance between the first measuring point 22 and the rail surface 50 is subject to the matching relationship between the gear box 20 and the axle and cannot be adjusted. Therefore, the leveling of the gear box 20 requires adjusting the height of the second measuring point 23, that is, by adding or removing the first adjustment pads 71, the deviation between the second measured height value and the theoretical height value between the second measuring point 23 and the rail surface 50, that is, ΔH A2 =H2-A2 is close to △H A1 , considering the leveling accuracy requirements, as long as △H A1 -△H A2 It is sufficient to be within the range of ±0.5mm, that is, to satisfy the above relationship A2+△H A1 -0.5mm≤H2≤A2+△H A1 +0.5mm is enough.

[0064] As a specific implementation of the above step S200, combined with Figure 2 It is understood that step S200 includes:

[0065] In step S201, the traction motor 10 is placed on the lifting support vehicle 60, and a third measured height value H3 of a third measuring point 11 near one axial end of the traction motor 10 from the rail surface 50 is measured, as well as a fourth measured height value H4 of a fourth measuring point 12 near the other axial end of the traction motor 10 from the rail surface 50 is measured; wherein, the vertical design distances of the third measuring point 11 and the fourth measuring point 12 from the output shaft center of the traction motor 10 are both H5, and the vertical design distance of the first measuring point 22 from the input shaft center of the gearbox 20 is H6.

[0066] It should be understood that for the convenience of operation, the process of measuring and leveling the traction motor 10 can be carried out when the traction is on the outside of the bogie 90. After the leveling is completed, the traction motor 10 is moved to align with the gear box 20 by the lifting support vehicle 60.

[0067] Step S202: Add a second adjustment pad 13 below one end of the traction motor 10 to adjust the height difference ΔH between the two ends of the traction motor 10 and the rail surface 50. B1 Satisfy: -0.5mm≤△H B1 =H4-H3≤+0.5mm, so that the traction motor 10 is in a horizontal state.

[0068] That is, considering the assembly accuracy requirement, when the vertical height difference between the third measuring point 11 and the fourth measuring point 12 and the rail surface 50 is within the range of ±0.5 mm, it is considered that the traction motor 10 is in a horizontal state.

[0069] In step S203, the support height of the lifting support vehicle 60 is adjusted, or second adjustment pads 13 of equal thickness are added or removed at the lower ends of the axial ends of the traction motor 10 until the condition H3+H5=H1+H6±0.5mm is met, thereby making the height of the output shaft of the traction motor 10 and the input shaft of the gearbox 20 consistent from the rail surface 50.

[0070] The lifting support vehicle 60 can drive the traction motor 10 to rise and fall through its own lifting mechanism, or it can directly adjust the overall support height of the traction motor 10 by adding or removing the second adjustment pads 13 under the two ends of the traction motor 10, so that the output shaft height of the traction motor 10 is consistent with the input shaft height of the gear box 20. Considering the assembly accuracy requirements, the height of the output shaft of the traction motor 10 and the input shaft of the gear box 20 is considered to be consistent when the height difference between the output shaft of the traction motor 10 and the input shaft of the gear box 20 is within the range of ±0.5mm.

[0071] When the output shaft of the traction motor 10 is in a horizontal state and the height of the input shaft of the gear box 20 is consistent, the traction motor 10 is moved to the assembly position. The horizontal position of the traction motor 10 relative to the gear box 20 can be adjusted by moving the lifting support vehicle 60 so that the two can reach a coaxial assembly state. Therefore, each elastic rubber node 40 and the coupling 30 can be directly assembled, which not only ensures the assembly accuracy requirements but also greatly reduces the assembly difficulty.

[0072] Optionally, in this embodiment, H5=H6, −0.5 mm≤ΔH=H1−H3≤+0.5 mm, where ΔH is the height difference between the output shaft center of the traction motor 10 and the input shaft center of the gearbox 20 and the rail surface 50 .

[0073] Taking into account the assembly accuracy requirements, the height difference ΔH between the output shaft center of the traction motor 10 and the input shaft center of the gearbox 20 and the rail surface 50 can be within the range of ±0.5 mm. Here, the first measuring point 22 is set at a position with a vertical spacing of H5 from the input shaft center of the gearbox 20, and the third measuring point 11 and the fourth measuring point 12 are both set at a position with a vertical spacing of H6 from the output shaft center of the traction motor 10. Since H5=H6, after the height adjustment of the traction motor 10 is completed, the first measuring point 22, the third measuring point 11 and the fourth measuring point 12 are on the same horizontal line at the same height, thereby reducing the difficulty of measuring and calculating the height of the traction motor 10. It is only necessary to measure the measured height values ​​of the first measuring point 22 and the third measuring point 11 to determine whether the height adjustment requirements are met.

[0074] For some possible implementations, see Figure 2 , the above step S300 includes:

[0075] Step S301 , measuring a first distance L1 between the input shaft end face of the gearbox 20 and the end face of the rubber bushing 41 of the elastic rubber node 40 , and measuring a second distance L2 between the output shaft end face of the traction motor 10 and the end face of the connecting seat 42 of the elastic rubber node 40 .

[0076] It should be noted that during assembly, the rubber bushing 41 of the elastic rubber node 40 is pressed into the flange connection hole of the gear box 20, and the connecting seat 42 of the rubber node is fixed on the traction motor 10. During assembly, the end face of the rubber bushing 41 abuts against the end face of the connecting seat 42, and then the core shaft is passed through the connecting seat 42 and the rubber bushing 41 and fixed.

[0077] Step S302 : Calculate the axial distance L= L1 − L2 between the input shaft end face of the gearbox 20 and the output shaft end face of the traction motor 10 .

[0078] Specifically, the flange of the gearbox 20 is located on the outside of the end face of its input shaft, and the end face of the connecting seat 42 is located on the inside of the end face of the output shaft of the traction motor 10. Based on this structural method, the axial spacing between the end face of the input shaft of the gearbox 20 and the end face of the output shaft of the traction motor 10 can be obtained by measuring the first distance L1 and the second distance L2 and calculating the difference between the two. During assembly, one half of the coupling 30 is pressed into the input shaft of the gearbox 20 to form a movable connection, and the other half is pressed into the output shaft of the traction motor 10 to form a movable connection. Since the two half sections are in an active state before being connected and fixed, the assembly fit of the coupling cannot be determined by directly measuring the distance between the two and their respective connecting shaft end faces, and can only be obtained by calculation through L1 and L2.

[0079] Step S303 : Calculate the thickness D of the gasket that needs to be added based on the axial design dimension L0 of the coupling 30 , wherein L−L0−0.5 mm≤D≤L−L0+0.5 mm.

[0080] In order to ensure the axial displacement capability of the coupling 30, the axial design dimension L0 of the coupling 30 and the axial spacing L between the input shaft end face of the gearbox 20 and the output shaft end face of the traction motor 10 are compared here, and the thickness of the gasket is determined according to the difference between the two. By adding a gasket of corresponding thickness to offset the size difference, it is ensured that the axial displacement capability of the coupling 30 meets the assembly requirements after the two ends are fixed. Specifically, the gasket can be pre-set to multiple specifications of 1mm, 2mm, and 3mm, and the gasket of corresponding thickness can be selected according to actual needs.

[0081] Specifically, the processing and assembly tolerances are controlled so that the first distance L1 is a positive difference and the second distance L2 is a negative difference, thereby making L<L0. In step S400, a gasket with a thickness of D is clamped between the end face of the rubber bushing and the end face of the connecting seat.

[0082] Taking into account the press-fit connections between the two half sections of the coupling 30 and the corresponding shafts, as well as the connection structure between the two half sections, it is not suitable to apply a gasket on the coupling 30. Therefore, it can only be done by applying a gasket between the rubber bushing 41 and the connecting seat 42. This determines that L<L0 must be ensured. Therefore, during the processing and assembly process, it should be noted that the first distance L1 is processed according to the positive difference and the second distance L2 is processed according to the negative difference.

[0083] It should be noted that, in step S400, before the bogie 90 is hoisted as a whole onto the runner tooling, the step also includes: limiting a tie spring of the bogie 90 to a no-load state by a pull rod.

[0084] Optionally, the structure of the wheel tooling in this embodiment is that the wheel tooling includes two groups of support rollers 80, and the two groups of support rollers 80 are used for rolling support directly below the two groups of wheel pairs 91 of the bogie 90, and each group of support rollers 80 includes at least two rollers.

[0085] It should be understood that before the traction motor 10 and the gearbox 20 are paired, the two half sections of the coupling 30 should be pre-pressed on the output shaft of the traction motor 10 and the input shaft of the gearbox 20, and two groups of support rollers 80 are used, and at least two rollers in each group roll to support the corresponding wheel pairs 91, so as to ensure the support stability of the bogie 90. At the same time, the two groups of support rollers 80 are independent of each other. By rotating one of the groups of support rollers 80, the axle and wheel pairs 91 connected to the gearbox 20 can be driven to rotate, thereby rotating the input shaft of the gearbox 20, so that the flange connection holes on the two half sections of the coupling 30 can be rotated to the bottom of the bogie 90 in turn to facilitate the screw connection operation; the assembly process does not require moving the bogie 90, which is not only simple and convenient to operate, but also labor-saving and efficient.

[0086] In order to improve the connection reliability of the coupling 30 and the circumferential force balance during operation, the flange connection holes at both ends of the coupling 30 are connected and fixed in a diagonal order. The specific order is as follows: Figure 3 As shown, it is performed sequentially from C1 to C9.

[0087] It should be understood that in this embodiment, a trench 81 suitable for operator access is provided between the two sets of support rollers 80, and the trench 81 is located directly below the coupling 30. When assembling the coupling 30, the operator enters the trench 81, thereby being able to operate while standing, which helps to reduce the difficulty and labor intensity of the operation.

[0088] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A method for assembling a coupling for a bogie drive device with an internal axle box, the method comprising: a traction motor and a gearbox connected transversely to the inside of a bogie; and a coupling having two ends connected to an output shaft of the traction motor and an input shaft of the gearbox, respectively; the traction motor and the gearbox being fixedly connected via a plurality of elastic rubber nodes distributed in an array; and characterized in that: The coupling assembly method comprises: Step S100, supporting the hanger of the gear box assembled on the axle, adjusting the support height of the hanger to make the gear box reach a horizontal state, and measuring a first height of the gear box from the rail surface; Step S200: horizontally placing the traction motor on a lifting support vehicle capable of traveling along the rail surface, measuring a second height between the traction motor and the rail surface, and adjusting the support height of the lifting support vehicle according to the difference between the second height and the first height so that the output shaft of the traction motor and the input shaft of the gearbox are at the same height from the rail surface; Step S300, measuring the axial distance between the traction motor and the gearbox, and determining the thickness of the gasket according to the axial distance; Step S400: Push the lifting support vehicle to bring the traction motor close to the gear box, and securely connect the traction motor and the gear box via the elastic rubber nodes. Lift the entire bogie onto the runner fixture, and rotate the wheelset to sequentially rotate the flange connection holes of the coupling to the bottom of the bogie for screw connection. The step S100 includes: Step S101, supporting the boom by using a rotary wheel supported on the rail surface, wherein the rotary wheel is provided with a plurality of first adjustment pads supported below the boom; Step S102: Measure a first height H1 of a first measuring point on the gearbox away from the boom from the rail surface, and obtain a first installation height error value ΔH of the gearbox based on the first height H1. A1 ; Step S103: Measure a second height H2 of the gearbox from a second measuring point on a side close to the boom to the rail surface, and obtain a second installation height error value ΔH of the gearbox based on the second height H2. A2 ; Step S104: adjusting the second measured height value H2 by adding or removing the first adjustment pad so that the first installation height error value ΔH A1 and the second installation height error value △H A2 Satisfy: -0.5mm≤△H A1 -△H A2 ≤+0.5mm; Step S105, obtaining the first height according to the first measured height value H1 and / or the second measured height value H2; The step S200 includes: Step S201: Placing the traction motor on the lifting support vehicle, measuring a third measured height value H3 of a third measuring point of the traction motor near one axial end thereof from the rail surface, and a fourth measured height value H4 of a fourth measuring point of the traction motor near the other axial end thereof from the rail surface; wherein the vertical design distances of the third and fourth measuring points from the center of the output shaft of the traction motor are both H5, and the vertical design distance of the first measuring point from the center of the input shaft of the gearbox is H6; Step S202: Add a second adjustment pad below one end of the traction motor to adjust the height difference ΔH between the two ends of the traction motor and the rail surface. B1 Satisfy: -0.5mm≤△H B1 =H4-H3≤+0.5mm, so that the traction motor is in a horizontal state; Step S203: Adjusting the support height of the lifting support vehicle or adding or removing second adjustment pads of equal thickness at the lower ends of both axial ends of the traction motor until the condition: H3 + H5 = H1 + H6 ± 0.5 mm is satisfied, thereby aligning the heights of the output shaft of the traction motor and the input shaft of the gearbox from the rail surface. The step S300 includes: Step S301, measuring a first distance L1 between an end face of an input shaft of the gearbox and an end face of a rubber bushing of the elastic rubber node, and measuring a second distance L2 between an end face of an output shaft of the traction motor and an end face of a connecting seat of the elastic rubber node; Step S302 , calculating an axial distance L=L1−L2 between an end face of the input shaft of the gearbox and an end face of the output shaft of the traction motor; Step S303 : Calculate the thickness D of the gasket that needs to be increased according to the axial design dimension L0 of the coupling, wherein L-L0-0.5mm≤D≤L-L0+0.5mm.

2. The coupling assembly method of the built-in axle box bogie drive device according to claim 1, characterized in that: The theoretical height of the first measuring point from the rail surface is A1, ΔH A1 =H1-A1; The theoretical height value of the second measuring point from the rail surface is A2. The second measuring height value H2 is adjusted by increasing or decreasing the number of the first adjustment shims until the following is satisfied: A2 + △H A1 -0.5mm≤H2≤A2+△H A1 +0.5mm.

3. The coupling assembly method of the built-in axle box bogie drive device according to claim 1, characterized in that: H5 =H6, -0.5mm≤ΔH=H1-H3≤+0.5mm, where ΔH is the height difference between the output shaft center of the traction motor and the input shaft center of the gearbox and the rail surface.

4. The coupling assembly method of the built-in axle box bogie drive device according to claim 1, characterized in that: The processing and assembly tolerances are controlled so that the first distance L1 is a positive difference and the second distance L2 is a negative difference, thereby making L<L0. In the step S400, the gasket with a thickness of D is clamped between the end face of the rubber bushing and the end face of the connecting seat.

5. The coupling assembly method of the built-in axle box bogie drive device according to claim 1, characterized in that: In the step S400, before the bogie is hoisted as a whole onto the runner tooling, the method further includes: limiting a tie spring of the bogie to a no-load state by a pull rod.

6. The coupling assembly method of the built-in axle box bogie drive device according to any one of claims 1 to 5, characterized in that: The wheel fixture includes two groups of support rollers, and the two groups of support rollers are respectively used for rolling support directly below the two groups of wheel pairs of the bogie, and each group of support rollers includes at least two rollers.

7. The coupling assembly method of the built-in axle box bogie drive device according to claim 6, characterized in that: A trench suitable for operators to enter is provided between the two groups of support rollers, and the trench is located directly below the coupling.

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