CN220388542U - Primary press-fitting device for pinion shaft bearing of motor train unit gearbox - Google Patents

Abstract

The utility model discloses a primary press-fitting device for a pinion shaft bearing of a motor train unit gearbox, which comprises a central positioning jacking mechanism, a supporting frame, a press-fitting guide sleeve and a rotating mechanism, wherein the central positioning jacking mechanism is arranged on the supporting frame; the inner ring of the supporting frame is provided with a rotating mechanism, and the outer ring of the supporting frame is provided with a press-fit guide sleeve; the center positioning jacking mechanism is arranged on the inner ring of the rotating mechanism and comprises a supporting column, a spring, a bottom support and a guide sleeve, wherein the outer ring of the supporting column is the guide sleeve, and the guide sleeve is matched with the inner ring of the rotating mechanism; the upper part of the support column passes through the guide sleeve, and the lower part of the support column is connected with the bottom support through a spring.

Description

Primary press-fitting device for pinion shaft bearing of motor train unit gearbox

Technical Field

The utility model discloses a primary press-fitting device for a pinion shaft bearing of a motor train unit gearbox.

Background

When the motor train unit returns to the factory for advanced repair, the pinion shaft bearing needs to be replaced, and the existing operation method is that the short end (PW) of the pinion shaft faces upwards, the short end bearing is pressed and assembled, and then the pinion shaft is turned over by 180 degrees, and the long end bearing of the pinion shaft is pressed and assembled. The specific press-fitting process is shown in fig. 1, and is specifically as follows:

the first step:

1. fixing the PM side support of the pinion shaft through a tool support;

2. the pinion PW side bearing 1 is placed on the pinion shaft PW side, and pressure is applied by the press-fitting tool 5 and the apparatus, press-fitting the PW side bearing 1 in place.

3. Rotating the pinion shaft for 180 degrees, and repeating the operation of the step 2;

and a second step of:

1. manually overturning the pinion shaft, and supporting and fixing the PW side of the pinion shaft through a tool support;

2. the PM side bearing 2 is placed on the pinion shaft PM side, and pressure is applied by the press-fitting jig 6 and the apparatus to press-fit the PM side bearing 2 into place.

3. Rotating the pinion shaft for 180 degrees, and repeating the operation of the step 2;

and a third step of:

1. the slinger 3 is placed on the pinion shaft PM side and pressure is applied by the press fitting tooling 7 and equipment to press fit the slinger 3 into place.

2. The slinger 4 is placed on the pinion shaft PM side and pressure is applied by the press fitting tooling 7 and equipment to press fit the slinger 5 into place.

3. And (5) rotating the pinion shaft by 180 degrees, and repeating the operation of the step (2).

The operation mode has the problems of low operation efficiency, high operation safety risk, low utilization rate of the press mounting equipment caused by the occupation of the press mounting equipment and the like.

Disclosure of Invention

Aiming at the defects existing in the prior art, the utility model aims to provide a primary press-fitting device for a pinion shaft bearing of a motor train unit gearbox, which is used for press-fitting the pinion shaft bearing and improves the working efficiency.

In order to achieve the above object, the present utility model is realized by the following technical scheme:

the embodiment of the utility model provides a primary press-fitting device for a pinion shaft bearing of a gearbox of a motor train unit, which comprises a central positioning jacking mechanism, a supporting frame, a press-fitting guide sleeve and a rotating mechanism, wherein the central positioning jacking mechanism is arranged on the supporting frame; the inner ring of the supporting frame is provided with a rotating mechanism, and the outer ring of the supporting frame is provided with a press-fit guide sleeve; the center positioning jacking mechanism is arranged on the inner ring of the rotating mechanism and comprises a supporting column, a spring, a bottom support and a guide sleeve, wherein the outer ring of the supporting column is the guide sleeve, and the guide sleeve is matched with the inner ring of the rotating mechanism; the upper part of the support column passes through the guide sleeve, and the lower part of the support column is connected with the bottom support through a spring.

As a further technical scheme, the supporting frame comprises an upper cover plate, a lower supporting frame and a bottom backing plate; the bottom of the upper cover plate is connected with the lower supporting frame, and the bottom of the lower supporting frame is connected with the bottom backing plate.

As a further technical solution, the press-fit guiding sleeve is fixed on the lower support frame.

As a further technical scheme, the lower supporting frame comprises an inner frame and an outer disc, wherein the outer disc is positioned at the lower part of the inner frame, and the bottom of the outer disc is connected with a bottom backing plate; the top of the inner frame is open, the center of the bottom is provided with a groove, and the bottom support of the center positioning jacking mechanism is placed in the groove.

As a further technical scheme, the rotating mechanism comprises a thrust bearing, and the thrust bearing is arranged between the lower bearing support seat and the upper bearing support seat.

As a further technical scheme, a spring is arranged at the bottom of the lower bearing support seat, and the bottom of the spring is arranged on the lower support frame.

As a further technical scheme, the upper bearing support seat is arranged on the outer ring of the guide sleeve.

As a further technical scheme, the bottom backing plate is of an annular structure, and the inner ring of the bottom backing plate is clamped on the outer ring of the inner frame.

As a further technical scheme, the press-fit guide sleeve consists of a protection layer and a metal layer, wherein the protection layer is positioned on the inner wall of the metal layer, and the press-fit guide sleeve is mainly used for guiding and righting the pinion shaft.

As a further technical scheme, the tops of the support columns are conical.

The beneficial effects of the utility model are as follows:

when the device for one-time press-fitting of the pinion shaft bearing of the motor train unit gearbox is used, the PW side bearing is firstly placed on the guide sleeve, then the PW side bearing of the pinion shaft is placed on the support column, then the PM side bearing is installed, and the press machine is started to finish the press-fitting work of 2 bearings at one time, so that the device for one-time press-fitting improves the working efficiency, reduces the potential safety hazard and indirectly improves the utilization rate of press-fitting equipment.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model.

FIG. 1 is a prior art press-fit schematic;

FIG. 2 is a schematic diagram of a press-fitting process according to the present utility model;

FIG. 3 is a schematic view of the whole structure of the press-fitting device according to the present utility model;

FIG. 4 is a schematic view of the whole structure of the press-fitting device according to the present utility model;

FIG. 5 is a schematic view of the whole structure of the press-fitting device according to the present utility model;

FIG. 6 is a schematic view of a press-fit device according to the present utility model with a press-fit guide sleeve removed;

FIG. 7 is a schematic view of the structure of the lower support frame;

FIG. 8 is a schematic view of the structure of the lower support frame;

FIG. 9 is a schematic view of the structure of the lower support frame;

FIG. 10 is a schematic view of the press-fit device of the present utility model with the press-fit guide sleeve, lower support frame and bottom pad removed;

FIG. 11 is a schematic illustration of FIG. 10 with the bearings removed;

FIG. 12 is a schematic view of a centering jack mechanism;

FIG. 13 is a schematic view of the centering jack mechanism with the guide sleeve removed;

FIG. 14 is a schematic view of an upper cover plate;

FIG. 15 is a schematic view of a press-fit guide sleeve;

FIG. 16 is a schematic view of a support column;

FIG. 17 is a schematic view of a support column;

FIG. 18 is a schematic view of an upper bearing support;

FIG. 19 is a schematic view of a lower bearing support;

FIG. 20 is a schematic view of the structure of the guide sleeve;

in the figure: a 1PW side bearing, a 2PM side bearing, a 3 oil retainer, a 4 oil retainer, a 5 press-fitting tool, a 6 press-fitting tool and a 7 press-fitting tool;

10 primary press-fitting devices, 11 press-fitting guide sleeves, 12 upper cover plates, 13 lower support frames, 13-1 inner frames, 13-2 outer discs and 13-3 grooves; 15 bottom backing plate, 14 upper bearing support, 16 lower bearing support, 17 thrust bearing, 18 support spring, 20 support post, 20-1 conical post, 20-2 cylindrical cavity, 21 guide sleeve, 22 bottom spring, 23 bottom support.

Detailed Description

It should be noted that the following detailed description is illustrative and is intended to provide further explanation of the utility model. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present utility model. As used herein, the singular forms also are intended to include the plural forms unless the present utility model clearly dictates otherwise, and furthermore, it should be understood that when the terms "comprise" and/or "include" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof;

for convenience of description, the words "upper", "lower", "left" and "right" in the present utility model, if they mean only the directions of upper, lower, left and right in correspondence with the drawings themselves, are not limiting in structure, but merely serve to facilitate description of the present utility model and simplify description, rather than to indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

As described in the background art, the utility model provides a primary press-fitting device for a pinion shaft bearing of a gearbox of a motor train unit, which aims to solve the technical problems.

In a typical embodiment of the present utility model, as shown in fig. 3, 4, 5, 6, 10 and 11, the primary press-mounting device for the pinion shaft bearing of the gearbox of the motor train unit provided in this embodiment mainly comprises a central positioning jacking mechanism, a supporting frame, a press-mounting guiding sleeve and a rotating mechanism; the press-fit guide sleeve is arranged on an outer ring of the bearing pressure-bearing support, a rotating mechanism is arranged in the bearing pressure-bearing support, and a center positioning jacking mechanism is arranged in the rotating mechanism;

the center positioning jacking mechanism is composed of a support column 20, a support spring 18, a bottom support 23 and a guide sleeve 21 as shown in fig. 12, 13 and 14, and mainly realizes the jacking of a pinion shaft and the positioning function of a bearing, so that concentricity is ensured; the support column 20 is shown in fig. 16 and 17, wherein a cylindrical cavity 20-2 is arranged at the bottom of the support column 20, and a conical column 20-1 is arranged at the top of the support column; the inside of the cylindrical cavity is used for placing the supporting spring 18, the top of the supporting spring 18 is contacted with the cylindrical cavity, and the bottom is arranged in the bottom support 23;

further, a guiding sleeve 21 is further arranged on the outer ring of the supporting column 20 to guide the supporting column 20.

Further, the bottom support 23 is in transition fit with the bottom groove of the lower support frame 13, the guide sleeve 21 is in clearance fit with the inner hole of the upper bearing support seat 14, the support spring 18 is supported between the bottom support 18 and the support column 20, when the support column 20 is pressed down, the support spring 18 can play a certain role in vibration reduction, and meanwhile after the pressure at the top of the support column 20 is removed, the support column 20 can return under the action of the support spring 18.

Further, as shown in fig. 20, the guide sleeve 21 in this embodiment has a cylindrical shape as a whole, and has a tapered upper portion, and is sleeved with the thrust bearing 17, the lower bearing support 16, and the upper bearing support 14.

Furthermore, the supporting frame mainly supports the bearing on the pinion shaft, so that the parallelism is ensured; which comprises an upper cover plate 12, a lower support frame 13 and a bottom pad 15; the bottom of the upper cover plate 12 is connected with the lower supporting frame 13 by bolts, and the bottom of the lower supporting frame 13 is connected with the bottom backing plate 15 by bolts.

Further, as shown in fig. 7, 8 and 9, the lower support frame 13 includes an inner frame 13-1 and an outer disc 13-2, wherein the outer disc 13-2 is located at the lower part of the inner frame 13-1, and the bottom of the outer disc 13-2 is connected with a bottom pad 15; the bottom backing plate 15 is of an annular structure, the inner ring of the bottom backing plate is clamped on the outer ring of the inner frame 13-1, the inner frame 13-1 is of a cylindrical structure, the top of the inner frame 13-1 is open, a groove 13-3 is formed in the bottom center, and a bottom support 23 of the center positioning jacking mechanism is placed in the groove; four holes are provided in the bottom central outer race, which holes cooperate with the four springs 22 described above.

Further, the upper cover 12 is shown in fig. 14, and has a disc-shaped structure with a plurality of process holes.

Further, a rotating mechanism is arranged on the inner ring of the lower supporting frame 13, the rotating mechanism comprises a thrust bearing 17, and the thrust bearing 17 is arranged between the lower bearing supporting seat 16 and the upper bearing supporting seat 14; the upper and lower support seats are used for supporting; the upper ring of the thrust bearing 17 can rotate, the lower ring is fixed, the upper ring can drive the upper bearing support seat 14 to rotate, the upper bearing support seat 14 further drives the guide sleeve 21 to rotate, and the guide sleeve 21 drives the upper gear shaft on the guide sleeve and the bearing on the gear shaft to rotate together; wherein the upper bearing support 14 is shown in fig. 18 and the lower bearing support 16 is shown in fig. 19.

Further, in the present embodiment, a spring 22 is disposed at the bottom of the lower bearing support base 16, and the bottom of the spring 22 is mounted on the lower support frame 13; the upper bearing support seat 14 is arranged on the outer ring of the guide sleeve 21; further, the front thrust bearing, the lower bearing support seat and the upper bearing support seat are connected together by adopting interference fit, the spring 22 is supported between the lower bearing support seat and the lower support frame, and the spring 22 plays a certain role in vibration reduction.

Further, the above-mentioned rotation mechanism mainly realizes the rotation of the gear shaft and the bearing mounted on the gear shaft.

Further, as shown in fig. 15, the press-fit guiding sleeve 11 comprises two layers, namely a protection layer and a metal layer, wherein the protection layer is positioned at the inner ring of the metal layer, the protection layer is a nylon layer, the metal layer is a 45 # steel layer, and the press-fit guiding sleeve 11 can realize guiding and righting of the pinion shaft; the press-fitting guide sleeve 11 is sleeved on the outer ring of the upper cover plate 12, the bottom is fixed on the lower support frame 13, and the part is connected with the lower support frame 13 by bolts. Furthermore, the press-fitting guide sleeve 11 can also play the roles of wrapping all parts of the whole device and extracting the whole device,

when the press-fitting device is used, the PW side bearing is firstly placed on the supporting frame, then the PW side of the pinion shaft is placed on the central positioning jacking mechanism, then the PM side bearing is installed, and the press is started to finish the press-fitting work of 2 bearings at one time, and the specific bearing press-fitting method comprises the following steps:

1. the bearing inner diameter size was measured using an inside micrometer and the pinion shaft outer diameter size was measured using an outside micrometer.

2. And a layer of lubricant is smeared on the surfaces of the inner hole of the bearing and the pinion shaft.

3. The PM side bearing/PW side bearing and the pinion shaft are placed on a primary press-fitting device of a pinion shaft bearing of a gearbox of a motor train unit, a guide sleeve is placed on the PM side of the pinion shaft, and a press machine is started for press-fitting. The press-fitting work of the bearing can be completed by one press-fitting, and the specific operation process is shown in fig. 2, and is as follows:

the first step:

1. placing the pinion shaft PW side bearing 1 on a support frame of a primary press-fitting device 10;

2. a center positioning jack mechanism for placing the pinion shaft in the primary press-fitting device 10;

3. after the above operation is completed, the PM side bearing 2 is continuously placed on the pinion shaft PM side, and the PM side bearing 2 is press-fitted into place by the press-fitting tool 6 and the equipment applying pressure;

4. the pinion shaft is rotated 180 degrees through rotating a rotating mechanism of the primary press-fitting device 10, the operation of the step 3 is repeated, and the compression is performed again, so that the stress uniformity of the whole device is ensured;

and a second step of:

1. the slinger 3 is placed on the pinion shaft PM side and pressure is applied by the press fitting tooling 7 and equipment to press fit the slinger 3 into place.

2. The slinger 4 is placed on the pinion shaft PM side and pressure is applied by the press-fitting tool 7 and equipment to press-fit the slinger 4 into place.

3. The pinion shaft is rotated 180 degrees through rotating a rotating mechanism of the primary press-fitting device, the operation of the step 2 is repeated, the compression is performed again, and the stress uniformity of the whole device is ensured.

Through this pressure equipment device, promoted the operating efficiency of whole pressure equipment, reduced the potential safety hazard, indirectly promoted the utilization ratio of pressure equipment.

Finally, it is pointed out that relational terms such as first and second are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions.

The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims (10)

1. The primary press-fitting device for the pinion shaft bearing of the motor train unit gearbox is characterized by comprising a central positioning jacking mechanism, a supporting frame, a press-fitting guide sleeve and a rotating mechanism; the inner ring of the supporting frame is provided with a rotating mechanism, and the outer ring of the supporting frame is provided with a press-fit guide sleeve; the center positioning jacking mechanism is arranged on the inner ring of the rotating mechanism and comprises a supporting column, a spring, a bottom support and a guide sleeve, the outer ring of the supporting column is provided with a guide sleeve, and the guide sleeve is matched with the inner ring of the rotating mechanism; the upper part of the support column passes through the guide sleeve, and the lower part of the support column is connected with the bottom support through a spring.

2. The primary press-fit device for pinion shaft bearings of a motor train unit gearbox of claim 1 wherein said support frame comprises an upper cover plate, a lower support frame and a bottom plate; the bottom of the upper cover plate is connected with the lower supporting frame, and the bottom of the lower supporting frame is connected with the bottom backing plate.

3. The primary press-fitting device for pinion shaft bearings of a motor train unit gearbox according to claim 2, wherein the lower support frame comprises an inner frame and an outer disc, the outer disc is positioned at the lower part of the inner frame, and the bottom of the outer disc is connected with a bottom backing plate; the top of the inner frame is open, the center of the bottom is provided with a groove, and the bottom support of the center positioning jacking mechanism is placed in the groove.

4. A primary press-fitting device for pinion shaft bearings of a motor train unit gearbox according to claim 3 wherein said bottom plate is of annular configuration with its inner race retained on the outer race of the inner frame.

5. A single press-fit device for a pinion shaft bearing of a motor train unit gearbox as set forth in claim 2 wherein said press-fit guide sleeve is secured to a lower support frame.

6. A single press-fit device for a pinion shaft bearing of a motor train unit gearbox as set forth in claim 2 wherein said rotating mechanism comprises a thrust bearing mounted between a lower bearing support and an upper bearing support.

7. The one-time press-fitting device for pinion shaft bearings of a motor train unit gear box according to claim 6, wherein a spring is provided at a bottom of the lower bearing support base, and the bottom of the spring is mounted on the lower support frame.

8. The single press-fit device for pinion shaft bearings of a motor train unit gearbox of claim 6 wherein said upper bearing support is mounted on an outer race of the guide sleeve.

9. A primary press-fitting device for pinion shaft bearings of motor train unit gearboxes as claimed in any one of claims 1 to 8 wherein said press-fitting guide sleeve is composed of a protective layer and a metal layer, said protective layer being located on the inner wall of the metal layer.

10. A primary press-fit device for pinion shaft bearings of a motor train unit gearbox as set forth in any one of claims 1-8 wherein the top of said support post is tapered.