An assembly method and tooling for axisymmetric parts of a gearbox structure driving device

Abstract

The present invention relates to an assembly method and tooling for axisymmetric parts of a gearbox structure drive device, comprising the following steps: a. Place the first connecting rod disc at the first end of the hollow shaft, and align the axis of the first connecting rod disc with the axis of the hollow shaft; b. Lock the relative angle between the first connecting rod disc and the second connecting rod disc to align the ear plates of the first connecting rod disc with the ear plates of the second connecting rod disc; c. Move the first connecting rod disc towards the hollow shaft and check whether several groups of teeth between the first connecting rod disc and the hollow shaft can mesh with each other. If the teeth can mesh with each other, continue with the installation; if the teeth cannot mesh with each other, unlock the first connecting rod disc and rotate the first connecting rod disc around the axis of the hollow shaft, and then perform steps b and c again. It ensures that the hollow shaft system can only be assembled in a state that meets the dynamic balance requirements, can prevent the occurrence of incorrect assembly problems, and reduce the inspection requirements after assembly.

Description

Technical Field

[0001] The present invention relates to the field of assembling railway locomotive drive systems, and particularly to a method and tooling for assembling axisymmetric parts of a gearbox structure drive device. Background Art

[0002] In the drive device of an electric locomotive, there are two typical assembly processes for the bearing housing structure and the gearbox structure respectively. Among them, an assembly step of the gearbox structure is: placing a hollow shaft on the bracket of the tooling, installing a first connecting rod disk at the first end of the hollow shaft, and a second connecting rod disk is integrally formed in advance at the second end of the hollow shaft. The first connecting rod disk, the second connecting rod disk and the hollow shaft form a hollow shaft system.

[0003] After the first connecting rod disk 3 is installed on the hollow shaft, the axes of the first connecting rod disk 3 and the second connecting rod disk 21 both coincide with the axis of the hollow shaft 2. Three ear plates 4 are circumferentially and evenly distributed on the first connecting rod disk 3 and the second connecting rod disk 21. Two through holes 41 are provided on the ear plates 4. During installation, it is necessary to ensure that the hollow shaft system meets the dynamic balance requirement, that is, the positions of the ear plates 4 on the first connecting rod disk 3 and the second connecting rod disk 21 are aligned with each other. A number of groups of corresponding teeth are processed on the circumference of the first end of the hollow shaft 2 and the first connecting rod disk 3. When the first connecting rod disk 3 is installed on the hollow shaft 2, the teeth of the corresponding groups of the hollow shaft 2 and the first connecting rod disk 3 are meshed with each other. However, during actual installation, the meshed teeth may not belong to the corresponding groups, which may cause the positions of the ear plates 4 on the first connecting rod disk 3 and the second connecting rod disk 21 not to be aligned (please refer to Figure 1 ), that is, the hollow shaft system cannot meet the dynamic balance requirement.

[0004] Currently, the problems of this kind of assembly can only be detected by visual inspection of operators. And performing visual inspection one by one requires a lot of manpower, and it is also easy to miss inspections during mass production. The uninspected parts directly flow into the subsequent assembly process. If detected during final inspection, the drive device needs to be disassembled and reassembled again, resulting in material losses and man-hour losses. If not detected during final inspection, after being installed on the locomotive and put into operation, due to the out-of-tolerance dynamic balance of the hollow shaft system, vibration faults will occur, leading to damage to the drive system, and ultimately causing a series of operating safety problems of the locomotive, and even resulting in consequences of loss of life and property of the people. Summary of the Invention

[0005] Aiming at the above deficiencies of the prior art, the purpose of the present invention is to provide a method and tooling for assembling axisymmetric parts of a gearbox structure drive device to solve one or more problems in the prior art.

[0006] To achieve the above purpose, the technical solution of the present invention is as follows:

[0007] A method for assembling axisymmetric parts of a gearbox structure drive device includes the following steps:

[0008] a. placing the first connecting rod disk at the first end of the hollow shaft, and aligning the axis of the first connecting rod disk with the axis of the hollow shaft;

[0009] b. locking the relative angle between the first link plate and the second link plate so that the ear plate of the first link plate is aligned with the ear plate of the second link plate;

[0010] c. moving the first connecting rod plate toward the hollow shaft to check whether the plurality of groups of teeth between the first connecting rod plate and the hollow shaft can mesh with each other,

[0011] If the teeth can mesh with each other, continue with the installation; if the teeth cannot mesh with each other, unlock the first connecting rod plate and rotate the first connecting rod plate around the axis of the hollow shaft, and perform steps b and c again.

[0012] Preferably, when the first connecting rod plate is rotated around the axis of the hollow shaft, the rotation angle of the first connecting rod plate is 120° or 240°.

[0013] A tool for assembling axisymmetric parts of a gearbox structure drive device, suitable for the above-mentioned method for assembling axisymmetric parts of a gearbox structure drive device, comprising a bracket for supporting the hollow shaft, the bracket comprising two positioning members, the two positioning members are respectively used to lock the ear plates of the first connecting rod disk and the second connecting rod disk, when the hollow shaft is placed on the bracket, the angle between the two positioning members and the vertical line connecting the axis of the hollow shaft is 0°, 120° or 240°, and the ear plate can slide relative to the positioning member along the axis of the hollow shaft.

[0014] Preferably, the positioning member is slidably matched with the bracket, and when the hollow shaft is placed on the bracket, the sliding direction of the positioning member relative to the bracket is parallel to the axis of the hollow shaft.

[0015] Preferably, when the positioning member locks the ear plate, the positioning member is inserted into at least two through holes of the ear plate and slidingly cooperates with the hole walls of the through holes.

[0016] Preferably, when the hollow shaft is placed on the bracket, a line connecting the two positioning members is parallel to the axis of the hollow shaft.

[0017] Beneficial technical effects of the technical solution of the present invention:

[0018] (1) When installing the first connecting rod disc, first ensure that the ear plates of the first connecting rod disc are aligned with the ear plates of the second connecting rod disc. Then, bring the first connecting rod disc close to the hollow shaft. If several sets of teeth between the first connecting rod disc and the hollow shaft can mesh with each other, then proceed with the installation. Among them, the alignment of the ear plates of the first connecting rod disc and the second connecting rod disc with each other is a sufficient condition to ensure that the hollow shaft system meets the dynamic balance requirements; the meshing of several sets of teeth between the first connecting rod disc and the hollow shaft can ensure that the first connecting rod disc can be successfully installed on the hollow shaft. If the above two conditions are not met during the installation process, the installation cannot be carried out, thus realizing the anti-mistake function, preventing the problem of incorrect assembly, further avoiding material loss and man-hour loss, and ensuring the normal operation of the drive system after it is put into operation, guaranteeing the running safety of the locomotive; at the same time, reducing the detection requirements after assembly and reducing the workload of the operators.

[0019] (3) There are three ear plates circumferentially distributed on both the first connecting rod disc and the second connecting rod disc. When rotating the first connecting rod disc around the axis of the hollow shaft, the rotation angle of the first connecting rod disc is 120° or 240°. After adjusting the angle of the first connecting rod disc, it can ensure that the ear plates of the first connecting rod disc are aligned with the ear plates of the second connecting rod disc again.

[0020] (4) Use two positioning parts to lock the ear plates of the first connecting rod disc and the second connecting rod disc respectively. When the hollow shaft is placed on the bracket, since the included angles between the perpendicular connecting lines of the two positioning parts and the axis of the hollow shaft are 0°, 120° or 240°, when the two positioning parts lock the ear plates of the first connecting rod disc and the second connecting rod disc, it can ensure that the ear plates of the first connecting rod disc and the second connecting rod disc are aligned, and it is not necessary for the staff to visually align them, which is convenient for operation.

[0021] (5) When the positioning part locks the ear plate of the first connecting rod disc, insert the positioning part into at least two through holes of the ear plate. Then, when the positioning part locks the ear plate, it can also stably support the first connecting rod disc or make the first connecting rod disc stably hang on the positioning part, and it is not necessary for the staff to provide support for the first connecting rod disc, which is convenient for the staff to install the first connecting rod disc. Description of the Drawings

[0022] Figure 1 Shows a schematic diagram of the incorrect installation of the hollow shaft system in the background technology of the present invention;

[0023] Figure 2 Shows a flowchart of the assembly method of the axisymmetric parts of the gearbox structure drive device in Embodiment 1 of the present invention;

[0024] Figure 3 Shows a schematic diagram of the structure of the assembly tooling for the axisymmetric structure parts of the gearbox structure drive device in Embodiment 1 of the present invention;

[0025] Figure 4Shows the left view of the assembly tooling for the axisymmetric structural parts of the gearbox structure drive device in the second embodiment of the present invention.

[0026] Reference signs in the drawings:

[0027] 1 - Bracket; 11 - Positioning hole; 12 - Positioning member; 121 - Positioning pin; 2 - Hollow shaft; 21 - Second connecting rod disc; 3 - First connecting rod disc; 4 - Ear plate; 41 - Through hole. Specific implementation manners

[0028] In order to make the objectives, technical solutions and advantages of the present invention clearer, the following further elaborates in detail on a method and tooling for assembling axisymmetric parts of a gearbox structure drive device proposed by the present invention in combination with the accompanying drawings and specific implementation manners. According to the following description, the advantages and features of the present invention will be clearer. It should be noted that the accompanying drawings are in a very simplified form and all use non-precise scales, only for conveniently and clearly assisting in explaining the objectives of the embodiments of the present invention. In order to make the objectives, features and advantages of the present invention more obvious and understandable, please refer to the accompanying drawings. It should be noted that the structures, scales, sizes, etc. shown in the drawings of this specification are only used to cooperate with the content disclosed in the specification for those skilled in this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention. Therefore, they do not have any technical substance. Any modification of the structure, change of the proportional relationship or adjustment of the size, without affecting the effects that the present invention can produce and the objectives that can be achieved, should still fall within the scope that the technical content disclosed by the present invention can cover.

[0029] Embodiment 1

[0030] The following will combine the attached Figure 2 with Figure 3 and specific embodiments to elaborate in detail on the technical solution of a method for assembling axisymmetric parts of a gearbox structure drive device of the present invention.

[0031] As Figure 2 shown, a method for assembling axisymmetric parts of a gearbox structure drive device in this embodiment includes the following steps:

[0032] a. Place the first connecting rod disc 3 at the first end of the hollow shaft 2 and make the axis of the first connecting rod disc 3 coincide with the axis of the hollow shaft 2;

[0033] b. Lock the relative angle between the first connecting rod disc 3 and the second connecting rod disc 21 to align the ear plate 4 of the first connecting rod disc 3 with the ear plate 4 of the second connecting rod disc 21;

[0034] c. Move the first connecting rod disc 3 towards the hollow shaft 2 and check whether several groups of teeth between the first connecting rod disc 3 and the hollow shaft 2 can mesh with each other,

[0035] If the groups of teeth between the first connecting rod plate 3 and the hollow shaft 2 can mesh with each other, continue the installation; if the teeth cannot mesh with each other, unlock the first connecting rod plate 3, rotate the first connecting rod plate 3 around the axis of the hollow shaft 2, and perform steps b and c again.

[0036] When installing the first connecting rod disc 3, first ensure that the ear plate 4 of the first connecting rod disc 3 is aligned with the ear plate 4 of the second connecting rod disc 21, that is, the phase difference between the first connecting rod disc 3 and the second connecting rod disc 21 is 0°, 120° or 240°. Then bring the first connecting rod disc 3 close to the hollow shaft 2, and if the several groups of teeth between the first connecting rod disc 3 and the hollow shaft 2 can be meshed with each other, then install it. Among them, the ear plates 4 of the first connecting rod disc 3 and the second connecting rod disc 21 are aligned with each other, which is a sufficient condition to ensure that the hollow shaft system meets the dynamic balance requirements; the several groups of teeth between the first connecting rod disc 3 and the hollow shaft 2 are meshed with each other, which can ensure that the first connecting rod disc 3 can be smoothly installed on the hollow shaft 2. If the above two conditions are not met during the installation process, the installation cannot be carried out, thereby realizing the error prevention function, preventing the problem of incorrect assembly, and thus avoiding material loss and labor time loss, and ensuring that the drive system works normally after going online, ensuring the safe operation of the locomotive; at the same time, reducing the inspection requirements after assembly and reducing the workload of operators.

[0037] Preferably, if the teeth between the first connecting rod disc 3 and the hollow shaft 2 cannot mesh with each other, the first connecting rod disc 3 is rotated around the axis of the hollow shaft 2, and the rotation angle is 120° or 240°. After the angle adjustment of the first connecting rod disc 3 is completed, the ear plate 4 of the first connecting rod disc 3 can be aligned with the ear plate 4 of the second connecting rod disc 21 again. It should be noted that the rotation angles of 120° and 240° in this embodiment are selected because the first connecting rod disc 3 has three ear plates 4 evenly distributed in the circumference, and the rotation angle is selected by the angle between any two ear plates 4. If the first connecting rod disc 3 and the second connecting rod disc 21 have four ear plates 4 evenly distributed in the circumference, the rotation angle should be selected as 90°, 180° or 270°.

[0038] like Figure 3 As shown, a gearbox structure drive device axisymmetric parts assembly tool of this embodiment is applicable to the above-mentioned gearbox structure drive device axisymmetric parts assembly method, including a tool base for supporting the hollow shaft 2, the tool base preferably may include a horizontal base and two brackets 1 installed on the horizontal base, the two brackets 1 respectively correspond to and support the two ends of the hollow shaft 2. Both brackets 11 are movably provided with positioning members 12, and the two positioning members 12 correspond to the first connecting rod disc 3 and the second connecting rod disc 21 respectively. In this embodiment, the two positioning members 12 are symmetrically arranged on both sides of the tool base, and when the hollow shaft 2 is placed on the bracket 1, the axis of the hollow shaft 2 is parallel to the line between the two positioning members 12.

[0039] After the hollow shaft 2 is placed on the bracket 1, a positioning member 12 on one side of the tooling base locks an ear plate 4 of the second connecting rod disc 21. When installing the first connecting rod disc 3, first move the first connecting rod disc 3 to the first end of the hollow shaft 2, keep the axis of the first connecting rod disc 3 coincident with the axis of the hollow shaft 2, and then adjust the angle of the first connecting rod disc 3 so that the positioning member 12 on the other side of the tooling base can lock an ear plate 4 of the first connecting rod disc 3. At this time, move the first connecting rod disc 3 towards the hollow shaft 2. If the teeth between the first connecting rod disc 3 and the hollow shaft 2 can mesh with each other, it means that the installation angle of the first connecting rod disc 3 is correct and the installation can continue; if the teeth between the first connecting rod disc 3 and the hollow shaft 2 cannot mesh with each other, it means that the installation angle of the first connecting rod disc 3 is incorrect and the angle needs to be adjusted and tried again.

[0040] Preferably, the positioning member 12 is slidably engaged with the bracket 1. When the hollow shaft 2 is placed on the bracket 1, the sliding direction of the positioning member 12 relative to the bracket 1 is parallel to the axis of the hollow shaft 2. A positioning hole 11 for the positioning member 12 to slide through is formed in the bracket 1, and the positioning hole 11 penetrates both sides of the bracket 1.

[0041] Preferably, the positioning member 12 in this embodiment includes two positioning pins 121. When the positioning member 12 locks the ear plate 4 of the first connecting rod disc 3 or the second connecting rod disc 21, the two positioning pins 121 are respectively inserted into two through holes 41 of the ear plate 4 and are slidably engaged with the hole walls of the through holes 41. When the first connecting rod disc 3 cooperates with the two positioning pins 121, the positioning pins 121 abut against the hole walls of the through holes 41. The cooperation of the two positioning pins 121 can prevent the first connecting rod disc 3 from rotating, lock the phase difference between the first connecting rod disc 3 and the second connecting rod disc 21, and can stably support the first connecting rod disc 3. During the subsequent installation of the first connecting rod disc 3 by the staff, it is only necessary to push the first connecting rod disc 3 to slide, and it is not necessary to continuously support the first connecting rod disc 3, which is convenient for operation.

[0042] When the assembled hollow shaft system needs to be removed from the bracket 1, the positioning member 12 can be slid along the axis of the positioning hole 11 to disengage the positioning member 12 from the ear plate 4 and release the locking state of the positioning member 12 on the ear plate 4. Then the staff can remove the assembled hollow shaft system.

[0043] In this embodiment, the two positioning members 12 are symmetrically arranged on both sides of the tooling base. When the hollow shaft 2 is placed on the bracket 1, the axis of the hollow shaft 2 is parallel to the connection line between the two positioning members 12, that is, the included angle between the two positioning members 12 and the perpendicular connection line of the axis of the hollow shaft 2 is 0°.

[0044] The assembly tool for the axisymmetric parts of a gearbox structure driving device in this embodiment is used as follows:

[0045] First, place the hollow shaft 2 on the bracket 1, adjust the placement angle of the hollow shaft 2, and use the two positioning pins 121 on one bracket 1 to lock the ear plate 4 of the second link plate 21;

[0046] Subsequently, place the first link plate 3 at the first end of the hollow shaft 2, keep the axis of the first link plate 3 coincident with the axis of the hollow shaft 2, and use the two positioning pins 121 on the other bracket 1 to lock an ear plate 4 of the first link plate 3.

[0047] Subsequently, push the first link plate 3 closer to the hollow shaft 2. If the groups of teeth between the first link plate 3 and the hollow shaft 2 can mesh with each other at this time, it indicates that the assembly angle between the first link plate 3 and the hollow shaft 2 is correct, and the installation work of the first link plate 3 and the hollow shaft 2 can continue; if the groups of teeth between the first link plate 3 and the hollow shaft 2 cannot mesh with each other at this time, it indicates that the assembly angle between the first link plate 3 and the hollow shaft 2 is incorrect, and the first link plate 3 needs to be removed from the positioning pin 121 and rotated 120° or 240°, and the other ear plate 4 of the first link plate 3 is locked by the positioning pin 121, and then check again whether the groups of teeth between the first link plate 3 and the hollow shaft 2 can mesh with each other;

[0048] When the first link plate 3 is locked by the positioning pin 121 and the groups of teeth between each first link plate 3 and the hollow shaft 2 can mesh with each other, the correct assembly of the first link plate 3 and the hollow shaft 2 is achieved.

[0049] Embodiment 2:

[0050] Refer to Figure 4 , the difference between this embodiment and Embodiment 1 is that the two positioning members 12 are arranged on both sides of the tooling base in an asymmetric form, and the bracket 1 extends upward to ensure that both positioning members 12 can be installed on the bracket 1. When the hollow shaft 2 is placed on the bracket 1, the included angle between the perpendicular connecting lines of the two positioning members 12 and the axis of the hollow shaft 2, that is, the size of angle A, is 120°. It should be noted that since both the first link plate 3 and the second link plate 21 have three ear plates 4, when the first link plate 3 is correctly installed, the positioning member 12 can lock any one of the three ear plates 4, so angle A can also be set to 240°. In this embodiment, the positioning members 12 are installed in an asymmetric form, increasing the selectivity of the installation position of the positioning members 12, which can meet the different usage habits of operators.

[0051] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of concise description, not all possible combinations of the technical features in the above embodiments are described. However, as long as the combinations of these technical features do not conflict, they should all be considered as the scope described in this specification.

[0052] The above-described embodiments merely represent several implementation manners of the present invention. The description thereof is relatively specific and detailed, but it should not be construed as a limitation on the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all fall within the protection scope of the present invention. Therefore, the protection scope of the present invention patent shall be subject to the appended claims.

Claims

1. A method for assembling an axisymmetric part of a gearbox structure driving device, characterized in that An assembly tool for an axisymmetric part of a gearbox structure driving device is adopted. The tool includes a bracket for supporting a hollow shaft. The bracket includes two positioning members, and the two positioning members are respectively used to lock the ear plates of the first connecting rod disc and the second connecting rod disc. When the hollow shaft is placed on the bracket, the included angle between the perpendicular connecting lines of the two positioning members and the axis of the hollow shaft is 0°, 120° or 240°, and the ear plate can slide relative to the positioning member along the axis of the hollow shaft. The positioning member is slidably matched with the bracket. When the hollow shaft is placed on the bracket, the sliding direction of the positioning member relative to the bracket is parallel to the axis of the hollow shaft. When the positioning member locks the ear plate, the positioning member inserts into at least two through holes of the ear plate and is slidably matched with the hole walls of the through holes. When the hollow shaft is placed on the bracket, the connecting line of the two positioning members is parallel to the axis of the hollow shaft; a number of groups of corresponding teeth are machined on the circumferential direction of the first end of the hollow shaft and the first connecting rod disc. When the first connecting rod disc is installed on the hollow shaft, the corresponding teeth of the hollow shaft and the first connecting rod disc are meshed with each other; It includes the following steps: a. Place the first connecting rod disc at the first end of the hollow shaft and make the axis of the first connecting rod disc coincide with the axis of the hollow shaft; b. Lock the relative angle between the first connecting rod disc and the second connecting rod disc to align the ear plate of the first connecting rod disc with the ear plate of the second connecting rod disc; c. Move the first connecting rod disc towards the hollow shaft and check whether a number of groups of teeth between the first connecting rod disc and the hollow shaft can be meshed with each other, If the teeth can be meshed with each other, continue with the installation; if the teeth cannot be meshed with each other, unlock the first connecting rod disc and rotate the first connecting rod disc around the axis of the hollow shaft, and execute steps b and c again.

2. The assembling method of an axisymmetric part of a gearbox structure driving device according to claim 1, characterized in that When rotating the first connecting rod disc around the axis of the hollow shaft, the rotation angle of the first connecting rod disc is 120° or 240°.

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