A traction motor flange assembly positioning device

Abstract

The utility model discloses a traction motor flange assembly positioning device, belonging to the technical field of traction motors, comprising a positioning block and an adjusting bolt; the upper end of the positioning block is provided with a first through hole; the lower end of the positioning block is provided with a first positioning boss protruding toward the side close to the oil seal end face, and the first positioning boss has a first positioning surface for fitting the oil seal end face; a moving space for the bearing cover end face to move left and right is formed between the first positioning boss and the positioning block; a threaded inner hole is provided on the first positioning boss; the adjusting bolt comprises a bolt head and a screw rod; the bolt head is located on the side close to the flange matching end face, and has a second positioning surface for fitting the flange matching end face; the screw rod extends into the threaded inner hole and is movably installed on the first positioning boss, and the distance between the oil seal end face and the flange matching end face is adjusted by adjusting the amount of the screw rod extending into the threaded inner hole. The utility model can ensure that the motor flange is accurately assembled and positioned, installed in place, and can also accurately control the axial insertion amount.

Description

Technical Field

[0001] The utility model belongs to the technical field of traction motors, and in particular relates to a flange assembly and positioning device for a traction motor. Background Art

[0002] The traction motor flange is one of the key components for transmitting power in the running part of the locomotive. The motor flange and the shaft are usually matched by a conical interference fit, and the shrink fit process is generally adopted when assembling the flange. The shrink fit process uses the principle of thermal expansion and contraction to heat the hole parts used for interference fit to a certain temperature, thereby temporarily eliminating the interference between the hole and the shaft, and then quickly assemble the shaft and the hole together according to the design requirements.

[0003] When the motor flange is heat-fitted, the assembler usually takes a rectangular gasket and directly places it between the end face of the motor oil seal and the mating end face of the flange for positioning, or uses a jack to position it between the end face of the motor oil seal and the mating end face of the flange to be assembled, and calculates the distance between the oil seal and the flange through the depth of the tooth. However, during the assembly process of the heat-fit assembly process, the axial insertion amount needs to be strictly controlled. If the axial insertion amount is too small, it will cause the flange or gear to sluggish during the operation of the locomotive; if the axial insertion amount is too large, it will cause the flange to crack during the operation of the locomotive. The above-mentioned positioning method will cause the assembler to be unable to accurately control the axial insertion amount, so that the flange will be slow or cause a cracking failure, and ultimately cause the locomotive to break on the main line, causing great harm to the safety of locomotive operation.

[0004] In addition, when assembling the flange, the current assemblers directly use the matching end face of the flange and the end face of the oil seal as the positioning reference surface for positioning. However, during assembly, the end face of the bearing cover on the upper side of the oil seal actually protrudes from the end face of the oil seal, resulting in the jack or rectangular pad used for positioning being fitted with the end face of the bearing cover instead of the end face of the oil seal, which in turn leads to inaccurate positioning of the shrink fit assembly, resulting in the consequence of inadequate installation. Therefore, there is an urgent need for a positioning device that can solve the above problems. Utility Model Content

[0005] The purpose of the utility model is to provide a traction motor flange assembly positioning device to address the above shortcomings, and to solve the current problem of inaccurate positioning during flange shrink fit assembly, resulting in inadequate installation and inability to accurately control the axial insertion amount. To achieve the above purpose, the utility model provides the following technical solutions:

[0006] A traction motor flange assembly positioning device comprises a positioning block and an adjusting bolt; a first through hole is provided at the upper end of the positioning block; a first positioning boss is provided at the lower end of the positioning block to protrude toward a side close to an oil seal end face, the first positioning boss has a first positioning surface for fitting the oil seal end face; a moving space for the bearing cover end face to move left and right is formed between the first positioning boss and the positioning block; a threaded inner hole is provided on the first positioning boss; the adjusting bolt comprises a bolt head and a screw rod; the bolt head is located on a side close to a flange mating end face, and has a second positioning surface for fitting the flange mating end face; the screw rod extends into the threaded inner hole and is movably mounted on the first positioning boss, and the distance between the oil seal end face and the flange mating end face is adjusted by adjusting the amount of the screw rod extending into the threaded inner hole.

[0007] Furthermore, the first positioning boss is semicircular.

[0008] Furthermore, the surface roughness of the first positioning surface is Ra≤3.2 μm.

[0009] Furthermore, the parallelism of the first positioning surface is not greater than 0.04 mm.

[0010] Furthermore, the surface roughness Ra of the second positioning surface is consistent with the surface roughness Ra of the first positioning surface.

[0011] Furthermore, a second positioning boss protruding toward a side close to the flange mating end face is also provided at the lower end of the positioning block.

[0012] Furthermore, the parallelism of the side wall of the second positioning boss on one side close to the flange mating end face is consistent with that of the first positioning surface.

[0013] Furthermore, two outer edges where the upper side surface of the positioning block intersects with the left and right side surfaces are both chamfered.

[0014] Furthermore, the sum of the length of the shaft of the screw and the thread on the screw does not exceed the depth of the threaded inner hole.

[0015] The beneficial effects of the utility model are:

[0016] 1. The utility model leaves a moving space between the first positioning boss and the upper end of the positioning block, so that when the end face of the bearing cover protrudes from the end face of the oil seal, the fitting of the end face of the oil seal on the lower side of the end face of the bearing cover and the first positioning face will not be affected, so that the shrink fit assembly can be accurately positioned and installed in place.

[0017] 2. The utility model can use the adjusting bolt to adjust the amount of insertion of the screw rod into the threaded inner hole and the thickness of the positioning device, thereby accurately adjusting the assembly distance between the oil seal and the flange to achieve the function of accurately controlling the axial insertion amount. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the utility model;

[0019] Figure 2 It is a schematic diagram of the utility model when the flange is shrink-fitted, and the end face of the bearing cover in the figure exceeds the end face of the oil seal;

[0020] Figure 3 It is a front view of the positioning block of the utility model;

[0021] Figure 4 It is a schematic diagram of the cross-sectional structure of a positioning block in one embodiment of the utility model;

[0022] Figure 5 It is a schematic cross-sectional structure diagram of a positioning block in another embodiment of the utility model;

[0023] In the accompanying drawings: 1-positioning block, 2-adjusting bolt, 11-first through hole, 12-first positioning boss, 13-second positioning boss, 121-first positioning surface, 122-threaded inner hole, 21-bolt head, 22-screw. DETAILED DESCRIPTION

[0024] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation methods, but the present invention is not limited to the following embodiments.

[0025] Embodiment 1:

[0026] See attached Figures 1-2A traction motor flange assembly positioning device comprises a positioning block 1 and an adjusting bolt 2; the positioning block 1 is provided with a first through hole 11 at the upper end; the positioning block 1 is provided with a first positioning boss 12 protruding toward the side close to the oil seal end face at the lower end, and the first positioning boss 12 has a first positioning surface 121 for fitting the oil seal end face; a moving space for the bearing cover end face to move left and right is formed between the first positioning boss 12 and the positioning block 1; the first positioning boss 12 is provided with a threaded inner hole 122; the adjusting bolt 2 comprises a bolt head 21 and a screw rod 22; the bolt head 21 is located at the side close to the flange mating end face, and has a second positioning surface 211 for fitting the flange mating end face; the screw rod 22 extends into the threaded inner hole 122 and is movably mounted on the first positioning boss 12, and the distance between the oil seal end face and the flange mating end face is adjusted by adjusting the amount of the screw rod 22 extending into the threaded inner hole 122. As can be seen from the above structure, a first through hole 11 is provided at the upper end of the positioning block 1. The first through hole 11 is used to insert a thin rope. The thin rope is used to lift the positioning block 1 and drive the positioning block 1 to shift to a suitable positioning position. A first positioning boss 12 is provided at the lower end of the positioning block 1, which protrudes toward the side close to the oil seal end face. The first positioning boss 12 has a first positioning surface 121 for fitting the oil seal end face, and a moving space is reserved between the first positioning boss 12 and the positioning block 1 for the bearing cover end face to move left and right. In this way, when the flange is heat-fitted, even if the bearing cover end face exceeds the oil seal end face, the bearing cover end face still has a certain moving space at the upper end of the positioning block 1, which will not affect the fitting of the oil seal end face below the bearing cover end face with the first positioning surface 121 on the first positioning boss 12, thereby ensuring the fitting effect and further ensuring the positioning reference surface is correct. Among them, in the attached Figure 2 As can be seen in the figure, the oil seal is arranged on the left side of the first positioning boss 12, and the flange is arranged on the right side of the bolt head 21. A bearing cover is arranged above the oil seal, and a bearing cover is arranged at the bottom of the oil seal. Figure 2The end face of the middle bearing cover exceeds the end face of the oil seal. The adjusting bolt 2 includes a bolt head 21 and a screw rod 22. The bolt head 21 is located on the side close to the flange mating end face and has a second positioning surface 211 for abutting the flange mating end face, while the screw rod 22 extends into the threaded inner hole 122 and is movably mounted on the first positioning boss 12. The threaded inner hole 122 provided on the first positioning boss 12 can be set as a blind hole or a through hole. When the threaded inner hole 122 is a through hole, the screw rod 22 of the adjusting bolt 2 does not exceed the side of the threaded inner hole 122 close to the oil seal end face. When the positioning device is used, the entire positioning device is hoisted by a thin rope and placed between the oil seal end face and the flange mating end face, with the first positioning surface 121 facing the oil seal end face, and the second positioning surface 211 facing the flange mating end face, and then the extension amount of the screw 22 in the threaded inner hole 122 is adjusted according to the calculated axial insertion amount, and then the thickness of the positioning device is adjusted to a thickness that meets the axial insertion amount requirement, and then the oil seal end face and the first positioning surface 121, the second positioning surface 211 and the flange mating end face are tightly fitted at the same time, that is, the shrink fit distance between the oil seal and the flange can be accurately controlled, and the axial insertion amount can be accurately controlled. The utility model can ensure accurate positioning during shrink fit and can accurately control the axial insertion amount.

[0027] Embodiment 2:

[0028] See attached Figures 1 to 5A traction motor flange assembly positioning device comprises a positioning block 1 and an adjusting bolt 2; the positioning block 1 is provided with a first through hole 11 at the upper end; the positioning block 1 is provided with a first positioning boss 12 protruding toward the side close to the oil seal end face at the lower end, and the first positioning boss 12 has a first positioning surface 121 for fitting the oil seal end face; a moving space for the bearing cover end face to move left and right is formed between the first positioning boss 12 and the positioning block 1; the first positioning boss 12 is provided with a threaded inner hole 122; the adjusting bolt 2 comprises a bolt head 21 and a screw rod 22; the bolt head 21 is located at the side close to the flange mating end face, and has a second positioning surface 211 for fitting the flange mating end face; the screw rod 22 extends into the threaded inner hole 122 and is movably mounted on the first positioning boss 12, and the distance between the oil seal end face and the flange mating end face is adjusted by adjusting the amount of the screw rod 22 extending into the threaded inner hole 122. As can be seen from the above structure, a first through hole 11 is provided at the upper end of the positioning block 1. The first through hole 11 is used to insert a thin rope. The thin rope is used to lift the positioning block 1 and drive the positioning block 1 to shift to a suitable positioning position. A first positioning boss 12 is provided at the lower end of the positioning block 1, which protrudes toward the side close to the oil seal end face. The first positioning boss 12 has a first positioning surface 121 for fitting the oil seal end face, and a moving space is reserved between the first positioning boss 12 and the positioning block 1 for the bearing cover end face to move left and right. In this way, when the flange is heat-fitted, even if the bearing cover end face exceeds the oil seal end face, the bearing cover end face still has a certain moving space at the upper end of the positioning block 1, which will not affect the fitting of the oil seal end face below the bearing cover end face with the first positioning surface 121 on the first positioning boss 12, thereby ensuring the fitting effect and further ensuring the positioning reference surface is correct. Among them, in the attached Figure 2 As can be seen in the figure, the oil seal is arranged on the left side of the first positioning boss 12, and the flange is arranged on the right side of the bolt head 21. A bearing cover is arranged above the oil seal, and a bearing cover is arranged at the bottom of the oil seal. Figure 2The end face of the middle bearing cover exceeds the end face of the oil seal. The adjusting bolt 2 includes a bolt head 21 and a screw rod 22. The bolt head 21 is located on the side close to the flange mating end face and has a second positioning surface 211 for abutting the flange mating end face, while the screw rod 22 extends into the threaded inner hole 122 and is movably mounted on the first positioning boss 12. The threaded inner hole 122 provided on the first positioning boss 12 can be set as a blind hole or a through hole. When the threaded inner hole 122 is a through hole, the screw rod 22 of the adjusting bolt 2 does not exceed the side of the threaded inner hole 122 close to the oil seal end face. When the positioning device is used, the entire positioning device is hoisted by a thin rope and placed between the oil seal end face and the flange mating end face, with the first positioning surface 121 facing the oil seal end face, and the second positioning surface 211 facing the flange mating end face, and then the extension amount of the screw 22 in the threaded inner hole 122 is adjusted according to the calculated axial insertion amount, and then the thickness of the positioning device is adjusted to a thickness that meets the axial insertion amount requirement, and then the oil seal end face and the first positioning surface 121, the second positioning surface 211 and the flange mating end face are tightly fitted at the same time, that is, the shrink fit distance between the oil seal and the flange can be accurately controlled, and the axial insertion amount can be accurately controlled. The utility model can ensure accurate positioning during shrink fit and can accurately control the axial insertion amount.

[0029] The first positioning boss 12 is semicircular. As can be seen from the above structure, a bearing cover is provided above the oil seal, and during assembly, the end face of the bearing cover may exceed the end face of the oil seal. When the top of the first positioning boss 12 is close to the bottom end of the bearing cover, there is a possibility of contact and friction. Therefore, setting the first positioning boss 12 close to the end face of the oil seal in a semicircular shape can reduce the wear of the bearing cover on the first positioning boss 12 during assembly and extend the service life of the positioning device.

[0030] The surface roughness Ra of the first positioning surface 121 is ≤3.2 μm. As can be seen from the above structure, the surface roughness Ra of the first positioning surface 121 is ≤3.2 μm, which can ensure that the first positioning surface 121 has a good fit with the oil seal end surface. Specifically, the surface roughness Ra of the first positioning surface 121 is 0.8 μm, 1.6 μm or 3.2 μm.

[0031] The parallelism of the first positioning surface 121 is not greater than 0.04 mm. From the above structure, it can be seen that the parallelism of the first positioning surface 121 is not greater than 0.04 mm. Specifically, the parallelism of the first positioning surface 121 can be 0.01 mm, 0.02 mm, 0.03 mm, or 0.04 mm.

[0032] The surface roughness Ra of the second positioning surface 211 is consistent with the surface roughness Ra of the first positioning surface 121. As can be seen from the above structure, the surface roughness Ra of the second positioning surface 211 is consistent with the surface roughness Ra of the first positioning surface 121, ensuring that the second positioning surface 211 has a good fit with the flange mating end surface.

[0033] Embodiment three:

[0034] See attached Figures 1 to 5 A traction motor flange assembly positioning device comprises a positioning block 1 and an adjusting bolt 2; the positioning block 1 is provided with a first through hole 11 at the upper end; the positioning block 1 is provided with a first positioning boss 12 protruding toward the side close to the oil seal end face at the lower end, and the first positioning boss 12 has a first positioning surface 121 for fitting the oil seal end face; a moving space for the bearing cover end face to move left and right is formed between the first positioning boss 12 and the positioning block 1; the first positioning boss 12 is provided with a threaded inner hole 122; the adjusting bolt 2 comprises a bolt head 21 and a screw rod 22; the bolt head 21 is located at the side close to the flange mating end face, and has a second positioning surface 211 for fitting the flange mating end face; the screw rod 22 extends into the threaded inner hole 122 and is movably mounted on the first positioning boss 12, and the distance between the oil seal end face and the flange mating end face is adjusted by adjusting the amount of the screw rod 22 extending into the threaded inner hole 122. As can be seen from the above structure, a first through hole 11 is provided at the upper end of the positioning block 1. The first through hole 11 is used to insert a thin rope. The thin rope is used to lift the positioning block 1 and drive the positioning block 1 to shift to a suitable positioning position. A first positioning boss 12 is provided at the lower end of the positioning block 1, which protrudes toward the side close to the oil seal end face. The first positioning boss 12 has a first positioning surface 121 for fitting the oil seal end face, and a moving space is reserved between the first positioning boss 12 and the positioning block 1 for the bearing cover end face to move left and right. In this way, when the flange is heat-fitted, even if the bearing cover end face exceeds the oil seal end face, the bearing cover end face still has a certain moving space at the upper end of the positioning block 1, which will not affect the fitting of the oil seal end face below the bearing cover end face with the first positioning surface 121 on the first positioning boss 12, thereby ensuring the fitting effect and further ensuring the positioning reference surface is correct. Among them, in the attached Figure 2 As can be seen in the figure, the oil seal is arranged on the left side of the first positioning boss 12, and the flange is arranged on the right side of the bolt head 21. A bearing cover is arranged above the oil seal, and a bearing cover is arranged at the bottom of the oil seal. Figure 2The end face of the middle bearing cover exceeds the end face of the oil seal. The adjusting bolt 2 includes a bolt head 21 and a screw rod 22. The bolt head 21 is located on the side close to the flange mating end face and has a second positioning surface 211 for abutting the flange mating end face, while the screw rod 22 extends into the threaded inner hole 122 and is movably mounted on the first positioning boss 12. The threaded inner hole 122 provided on the first positioning boss 12 can be set as a blind hole or a through hole. When the threaded inner hole 122 is a through hole, the screw rod 22 of the adjusting bolt 2 does not exceed the side of the threaded inner hole 122 close to the oil seal end face. When the positioning device is used, the entire positioning device is hoisted by a thin rope and placed between the oil seal end face and the flange mating end face, with the first positioning surface 121 facing the oil seal end face, and the second positioning surface 211 facing the flange mating end face, and then the extension amount of the screw 22 in the threaded inner hole 122 is adjusted according to the calculated axial insertion amount, and then the thickness of the positioning device is adjusted to a thickness that meets the axial insertion amount requirement, and then the oil seal end face and the first positioning surface 121, the second positioning surface 211 and the flange mating end face are tightly fitted at the same time, that is, the shrink fit distance between the oil seal and the flange can be accurately controlled, and the axial insertion amount can be accurately controlled. The utility model can ensure accurate positioning during shrink fit and can accurately control the axial insertion amount.

[0035] The first positioning boss 12 is semicircular. As can be seen from the above structure, a bearing cover is provided above the oil seal, and during assembly, the end face of the bearing cover may exceed the end face of the oil seal. When the top of the first positioning boss 12 is close to the bottom end of the bearing cover, there is a possibility of contact and friction. Therefore, setting the first positioning boss 12 close to the end face of the oil seal in a semicircular shape can reduce the wear of the bearing cover on the first positioning boss 12 during assembly and extend the service life of the positioning device.

[0036] The lower end of the positioning block 1 is also provided with a second positioning boss 13 protruding toward the side close to the flange mating end face. As can be seen from the above structure, the second positioning boss 13 is provided on the side of the lower end of the positioning block 1 away from the oil seal end face, which can reduce the difficulty of processing and make it easy to control the parallelism of the first positioning surface 121 and the side wall of the second positioning boss 13 close to the flange mating end face to be consistent, thereby ensuring accurate assembly positioning.

[0037] The parallelism of the side wall of the second positioning boss 13 close to the flange mating end face is consistent with the first positioning surface 121. As can be seen from the above structure, this arrangement can reduce the difficulty of machining the positioning block 1 and reduce the production cost. Specifically, the parallelism of the side wall of the second positioning boss 13 close to the flange mating end face is not greater than 0.04 mm, and can be 0.01 mm, 0.02 mm, 0.03 mm, or 0.04 mm.

[0038] The two outer edges of the upper side surface of the positioning block 1 intersecting with the left and right side surfaces are both chamfered. As can be seen from the above structure, the chamfering is used to prevent collision and ensure the personal safety of the assembler.

[0039] The sum of the length of the shaft of the screw rod 22 and the length of the thread on the screw rod 22 does not exceed the depth of the threaded inner hole 122. As can be seen from the above structure, this arrangement can prevent the shaft of the screw rod 22 extending into one end of the threaded inner hole 122 from exceeding the other end of the threaded inner hole 122, thereby affecting the fit between the first positioning surface 121 and the end surface of the oil seal.

[0040] Preferably, since some locomotive traction motors and gear boxes use flange connections to transmit torque, while others use gear transmission, the positioning device of the utility model can also be applied to shrink fit between oil seals and gears.

[0041] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A traction motor flange assembly and positioning device, characterized in that: The invention comprises a positioning block (1) and an adjusting bolt (2); the upper end of the positioning block (1) is provided with a first through hole (11); the lower end of the positioning block (1) is provided with a first positioning boss (12) protruding toward the side close to the oil seal end face, and the first positioning boss (12) has a first positioning surface (121) for abutting the oil seal end face; a moving space for the bearing cover end face to move left and right is formed between the first positioning boss (12) and the positioning block (1); the first positioning boss (12) is provided with a screw The adjusting bolt (2) comprises a bolt head (21) and a screw rod (22); the bolt head (21) is located on a side close to the flange mating end face and has a second positioning surface (211) for abutting the flange mating end face; the screw rod (22) extends into the threaded inner hole (122) and is movably mounted on the first positioning boss (12); the distance between the oil seal end face and the flange mating end face is adjusted by adjusting the amount of the screw rod (22) extending into the threaded inner hole (122).

2. A traction motor flange assembly and positioning device according to claim 1, characterized in that: The first positioning boss (12) is semicircular.

3. The traction motor flange assembly and positioning device according to claim 1, characterized in that: The surface roughness of the first positioning surface (121) is Ra≤3.2 μm.

4. A traction motor flange assembly and positioning device according to claim 1 or 3, characterized in that: The parallelism of the first positioning surface (121) is no greater than 0.04 mm.

5. The traction motor flange assembly and positioning device according to claim 3, characterized in that: The surface roughness Ra of the second positioning surface (211) is consistent with the surface roughness Ra of the first positioning surface (121).

6. The traction motor flange assembly and positioning device according to claim 1, characterized in that: The lower end of the positioning block (1) is also provided with a second positioning boss (13) protruding toward a side close to the flange mating end surface.

7. A traction motor flange assembly and positioning device according to claim 6, characterized in that: The parallelism of the side wall of the second positioning boss (13) close to the flange matching end face is consistent with that of the first positioning face (121).

8. The traction motor flange assembly and positioning device according to claim 1, characterized in that: The two outer edges of the upper side surface of the positioning block (1) intersecting with the left and right side surfaces are both chamfered.

9. The traction motor flange assembly and positioning device according to claim 1, characterized in that: The sum of the length of the shaft of the screw rod (22) and the thread length on the screw rod (22) does not exceed the depth of the threaded inner hole (122).

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