Bearing seat withdrawing device

Abstract

The utility model relates to the technical field of locomotive traction motor disassembly and maintenance, in particular to a bearing seat withdrawing device which comprises a supporting rod arranged in the center of a bearing seat, a hollow jack is sleeved outside the supporting rod, and a connecting plate is installed on the end face of one end of the bearing seat. The connecting plate comprises a central mounting hole and mounting wing plates diverging outwards from the central mounting hole; an annular mounting arm protruding towards one side of the supporting rod is arranged at the end, away from the bearing seat, of the connecting plate and used for mounting a pulling plate, the pulling plate comprises a mounting end connected with the mounting arm and a stopping end arranged opposite to the mounting end, and the pulling plate surrounds the outer wall of the hollow jack; one end of the hollow jack extends into the mounting arm, and the other end is close to the inner wall of the stop end. According to the bearing seat withdrawing device, the manual high-intensity operation process is eliminated, and the health of staff is guaranteed; the tool is simple in structure, convenient to operate and relatively low in manufacturing cost; the bearing seat can be disassembled by one person, and the maintenance cost is reduced.

Description

Technical Field

[0001] The utility model relates to a bearing seat withdrawal device, belonging to the technical field of disassembly and maintenance of locomotive traction motors. Background Art

[0002] The hydraulic disassembly method is widely used in rail transit, machinery manufacturing, aerospace and other industries. It is simple to operate and efficient. The technical principle is to use the injection of pressurized oil to cause elastic deformation of the interference fit parts, in which the hole is enlarged and the journal is reduced. The gap between the hole and the shaft is filled with a high-pressure oil film. At this time, with the help of the external axial force, the hole and the shaft are separated. When the hydraulic disassembly method separates the interference fit, there is a layer of oil film between the hole and the shaft mating surface, which forms a lubricating environment during the disassembly process, greatly reducing the friction of disassembly and avoiding the strain and deformation of the mating surface.

[0003] The hydraulic disassembly method is widely used to separate interference fit parts. It is easy to disassemble and can be repeatedly assembled and disassembled without affecting the quality of the mating surface. The hydraulic disassembly method is often used to remove the bearing seat of the locomotive traction motor. Its disadvantages are: 1) The entire operation process is completely dependent on manpower, and the labor intensity of employees is high, especially the instantaneous withdrawal of the bearing seat has high requirements for strength; 2) The existing process has certain requirements for the skills of employees and the degree of cooperation between two people. When novices or personnel are rotated, the bearing seat often partially withdraws, and it needs to be pressed again and then withdrawn repeatedly, which is time-consuming and laborious; 3) After multiple motor disassembly, the threads of the oil filling holes of the shaft have different degrees of wear, and in severe cases, oil pressure cannot be applied, resulting in the existing process being unable to withdraw the bearing seat, and this proportion will gradually increase with the increase in the number of maintenance times; 4) With the continuous addition of local maintenance bases across the country, insufficient personnel has become a pain point for improving maintenance capacity. Under the premise of advocating multi-skilled employees, it is also important to reduce personnel by optimizing processes or equipment. Therefore, it is necessary for one person to operate the withdrawal of the bearing seat.

[0004] Existing operations such as Figure 1 As shown, the bearing seat of the locomotive traction motor is withdrawn from the device. The threaded hole on the end face of the shaft needs to be installed with an oil nozzle, and the surface of the bearing seat needs to be tightened with a lifting fixture; one person gradually increases the pressure of the hydraulic pump, and the other person holds the lifting fixture with both hands, and continuously pushes and pulls the bearing seat, so that the hydraulic oil injected into the oil filling hole of the shaft can fully lubricate the contact surface between the shaft and the bearing seat; after confirming that the bearing seat can be easily moved, quickly pressurize the hydraulic pump, and the other person instantly pulls the bearing seat with the bearing out of the shaft.

[0005] After retrieval, CN202221505296.9 discloses an auxiliary disassembly tool for the bearing and shaft seal of a centrifugal cargo oil pump, which includes a self-made steel plate, a jack, a short steel pipe and a pump shaft. The ends of the pump shaft are respectively provided with a coupling and a bearing seat, and a bearing is arranged inside the bearing seat. This auxiliary tool has a simple structure and is easy to use, facilitating the disassembly of the coupling, bearing, bearing seat and shaft seal of the centrifugal cargo oil pump. It can quickly disassemble the bearing, bearing seat and shaft seal on the pump shaft without removing the entire pump casing and hammering the coupling, etc., thus protecting the pump shaft and reducing the labor intensity of personnel, and can be widely promoted.

[0006] The above structure cannot be applied to the removal of the bearing of a locomotive traction motor. In view of the above situation, a bearing seat removal device is proposed, which eliminates the process of manual heavy-duty operation, increases the usage efficiency, and has great practical significance and economic value for actual production. Utility Model Content

[0007] Aiming at the deficiencies of the above-mentioned prior art, the present utility model discloses a bearing seat removal device, which is provided with a support rod adapted to the structure design of the bearing seat. The support rod is the installation and integration position of the entire device. One end of the pull plate is used to connect the bearing seat, and the other end is used to bear the jacking force given by the hollow jack, so that the entire bearing removal operation can be realized without manual operation under the common cooperation of the pull plate, the hollow jack and the connecting plate, improving the efficiency of the removal process. During the removal of the bearing seat, the force is evenly distributed, and the surface damage to the components is very small; the whole set of devices is easy to carry, suitable for different working sites, and has higher flexibility.

[0008] To achieve the above object, the technical solution adopted by the present utility model is:

[0009] Disclose a bearing seat removal device, which includes a support rod arranged at the center of the bearing seat. A hollow jack is sleeved outside the support rod. One end face of the bearing seat is provided with a connecting plate, and the connecting plate includes a central mounting hole and mounting wing plates diverging outward from the central mounting hole; a circumferential mounting arm protruding toward the support rod is provided at the end of the connecting plate away from the bearing seat for mounting the pull plate. The pull plate includes a mounting end connected to the mounting arm and a stop end opposite to the mounting end. The pull plate surrounds the outer wall of the hollow jack; one end of the hollow jack extends into the mounting arm, and the other end is close to the inner wall of the stop end.

[0010] In the bearing seat removal device of the present utility model, the connecting plate and the bearing seat are fastened into a whole by bolts. The support rod is screwed into the process hole of the rotating shaft, the hollow jack is installed, the pull plate is sleeved on the upper ends of the connecting plate and the support rod, and the hollow jack is started to apply an outward jacking force, which is sequentially transmitted to the pull plate and the connecting plate, thereby removing the bearing seat.

[0011] Further, the centers of the support rod, the hollow jack, the pull plate and the bearing seat are on the same horizontal line.

[0012] Further, the pull plate further includes a curved connecting arm connecting the mounting end and the stop end. The mounting end is a flange nested in the mounting arm and can be stuck on the inner end face of the connecting plate.

[0013] Further, a U-shaped groove is circumferentially provided on the mounting arm. The flange abuts against the U-shaped groove, and the diameter of the circle where the flange is located is greater than the circumferential diameter of the bottom of the U-shaped groove, which is convenient for sleeving the pull plate onto the connecting plate.

[0014] Further, the stop end is a plate body with an inverted U-shaped outer surface, and an inverted U-shaped support rod extending hole is provided at the center of the plate body.

[0015] Further, the mounting wing plate of the connecting plate is a special-shaped plate that gradually narrows from the center to the outside. A stepped block protruding towards the bearing seat is provided at the outer edge end of the mounting wing plate to fit firmly with the bearing seat.

[0016] Further, the inner hole diameter of the mounting arm of the connecting plate is larger than the outer wall of the hollow jack.

[0017] Further, a mounting convex ring is provided on the end face of the bearing seat, and the outer diameter of the mounting convex ring is equal to the inner diameter of the stepped block.

[0018] Further, the support rod includes a connecting threaded end and a rod body. A convex platform part is provided between the connecting threaded end and the rod body. The convex platform part is an annular body extending outward from the rod body, and the outer diameter of the annular body is smaller than the inner diameter of the mounting arm used to strengthen the force support on the hollow jack.

[0019] Further, a handle is provided on the outside of the pull plate.

[0020] The present utility model designs a bearing seat withdrawal device according to the size and installation position of the bearing seat. The connecting plate and the bearing seat are fastened into a whole by bolts. The support rod is screwed into the process hole at the center of the rotating shaft seat. The hollow jack is installed outside the support rod. The pull plate is sleeved on the upper ends of the connecting plate and the support rod. The hollow jack is started to apply an outward jacking force, which is sequentially transmitted to the pull plate and the connecting plate, so as to withdraw the bearing seat.

[0021] Compared with the prior art, the beneficial effects of the present utility model are:

[0022] The bearing housing withdrawal device of the present utility model can pull out the bearing housing by using a tooling and a jack. The connecting plate connects the bearing housing together with bolts. The baffle of the pulling plate is stuck on the inner end face of the U-shaped groove of the connecting plate. An outward jacking force is applied by the hollow jack and is sequentially transmitted to the pulling plate and the connecting plate, thereby withdrawing the bearing housing. This bearing housing withdrawal device eliminates the process of manual heavy-duty operation, and the health of employees is guaranteed; the tooling structure is concise, the operation is convenient, and the manufacturing cost is relatively low; it realizes that one person can disassemble the bearing housing, reducing the maintenance cost; it can be applied to the disassembly of other similar interference-fit parts, and the application environment is wide; the bearing housing is evenly stressed during the withdrawal process, and the surface damage to the parts is very small.

[0023] In summary, the bearing housing withdrawal device of the present utility model is easy to carry, suitable for different working sites, and has higher flexibility. The whole set of devices has a concise structure, low manufacturing cost, high working efficiency, convenient use, and wide application range. Brief Description of the Drawings

[0024] Figure 1 It is a schematic structural diagram of the bearing housing withdrawal device of the prior art.

[0025] Figure 2 It is a schematic structural diagram of the bearing housing withdrawal device of the present utility model.

[0026] Figure 3 It is a schematic detailed structural diagram of the bearing housing withdrawal device of the present utility model.

[0027] Figure 4 It is a schematic structural diagram of the pulling plate of the bearing housing withdrawal device of the present utility model.

[0028] Figure 5 It is a schematic cross-sectional structural diagram of the pulling plate of the bearing housing withdrawal device of the present utility model.

[0029] Figure 6 It is a schematic structural diagram of the support rod of the bearing housing withdrawal device of the present utility model.

[0030] Figure 7 It is a schematic structural diagram of the connecting plate of the bearing housing withdrawal device of the present utility model.

[0031] Figure 8 It is a schematic cross-sectional structural diagram of the connecting plate of the bearing housing withdrawal device of the present utility model.

[0032] Among them, 1 - drawplate, 11 - installation end, 12 - stop end, 13 - curved surface connecting arm, 14 - support rod extension hole, 15 - handle, 2 - support rod, 21 - connecting threaded end, 22 - rod body, 23 - boss part, 3 - hollow jack, 4 - connecting plate, 41 - central installation hole, 42 - installation wing plate, 421 - stepped block, 43 - installation arm, 100 - bearing seat, 101 - installation convex ring. Specific implementation mode

[0033] For the convenience of elaborating and understanding the present utility model, the following will combine with the attached Figure 2-8 Make a detailed description of the embodiments of the present utility model. Embodiment 1

[0034] As Figures 2-8 Shown, the bearing seat withdrawal device of this embodiment is arranged on one end face of the bearing seat 100, and a support rod 2, a hollow jack 3, and a drawplate 1 are provided at the center on the same horizontal line. Specifically, a support rod 2 is arranged at the center of the bearing seat 100, and the designed support rod 2 is fixed in the central hole of the end face of the rotating shaft, used to support the hollow jack and the drawplate. And the support rod 2 includes a connecting threaded end 21 and a rod body 22, and a boss part 23 is arranged between the connecting threaded end 21 and the rod body 22. The boss part is an annular body extending outward from the rod body 22, used to strengthen the force support for the hollow jack 3. One side of the boss part 23 is attached to the end face of the bearing seat 100, and the other side is attached to the fixed end of the hollow jack 3.

[0035] A hollow jack 3 is sleeved outside the support rod 2. One end face of the bearing seat 100 is installed with a connecting plate 4. The connecting plate 4 includes a central installation hole 41 and installation wing plates 42 diverging outward from the central installation hole 41; an annular installation arm 43 protruding toward the support rod 2 is arranged at the end of the connecting plate 4 away from the bearing seat, used to install the drawplate 1; the drawplate 1 includes an installation end 11 connected to the installation arm 43 and a stop end 12 arranged opposite to the installation end. The drawplate 1 surrounds the outer wall of the hollow jack 3; one end of the hollow jack 3 extends into the installation arm 43, and the other end is close to the inner wall of the stop end 12.

[0036] The drawplate 1 in this embodiment further includes a curved surface connecting arm 13 connecting the installation end 11 and the stop end 12. The installation end 11 is a flange nested in the installation arm 43 and can be stuck on the inner end face of the connecting plate. This embodiment designs a drawplate to transmit the jacking force to the connecting plate 4 for the jack; for the convenience of lifting operation, a handle 15 is also arranged on the outer side of the drawplate 1; a flange is arranged at the installation end 11, which can be stuck on the inner end face of the connecting plate 4. The diameter of the circle where the flange is located is slightly larger than the outer diameter of the U-shaped groove where the connecting plate is stressed, which is convenient for sleeving onto the connecting plate, and its semi-circular structure is convenient for installation and disassembly.

[0037] Specifically, the stop end 12 is a plate body with an inverted U-shaped outer surface, and an inverted U-shaped support rod protruding hole 14 is provided at the center of the plate body. The U-shaped support rod protruding hole 14 can effectively position to ensure that the whole force during operation is basically concentric with the rotating shaft.

[0038] In this embodiment, the mounting wing plate 42 of the connecting plate 4 is a special-shaped plate that gradually narrows from the center to the outside. A stepped block 421 protruding towards the bearing seat 100 is provided at the outer edge end of the mounting wing plate 42 to fit firmly with the bearing seat 100. An installation convex ring 101 is provided on the end face of the bearing seat 100, and the outer diameter of the installation convex ring 101 is equal to the inner diameter of the stepped block 421. The mounting wing plate 42 can effectively fix the connecting plate 4 on the end face of the bearing seat 100. A number of mounting holes are provided on the mounting wing plate 42 for bolt-fastening the connecting plate 4 in the threaded hole of the bearing seat, and the circular diameter dimension thereof is the same as the circular diameter dimension of the threaded hole of the bearing seat 100; a U-shaped groove is provided on the circumferential mounting arm 43 of the connecting plate for transmitting the jacking force of the hollow jack to the bearing seat, and the outer diameter dimension is slightly smaller than the outer diameter of the edge of the pull plate, which is convenient for the pull plate to lift and load and unload; the middle of the connecting plate 4 is designed as a hollow structure, which is convenient for the jacking operation of the hollow jack, and the inner diameter dimension of the connecting plate 4 is slightly larger than the outer diameter dimension of the hollow jack 3.

[0039] Moreover, the outer diameter of the annular body of the convex platform part 23 is smaller than the inner diameter of the mounting arm 43. A U-shaped groove is provided circumferentially on the mounting arm 43, and the edge is in contact with the U-shaped groove. The diameter of the circle where the edge is located is larger than the circumferential diameter of the bottom of the U-shaped groove, which is convenient for sleeving the pull plate 1 onto the connecting plate 4.

[0040] According to the size and installation position of the bearing seat, a bearing seat withdrawal device is designed. The connecting plate 4 and the bearing seat 100 are fastened into a whole by bolts. The support rod 2 is screwed into the central hole of the rotating shaft seat, the hollow jack 3 is installed, the pull plate 1 is sleeved on the upper ends of the connecting plate 4 and the support rod 2, and the hollow jack 3 is started to apply an outward jacking force, which is sequentially transmitted to the pull plate 1 and the connecting plate 4, so as to withdraw the bearing seat 100. This device realizes that one person can disassemble the bearing seat, reduces the maintenance cost; can be applicable to the disassembly of other similar interference-fit parts, and has a wide application environment; the force is evenly distributed during the withdrawal of the bearing seat, and the surface damage to the parts is very small.

[0041] The above are only the embodiments of the present invention. The present invention is not limited to the fields involved in this embodiment case, and common knowledge such as the specific structures and characteristics known in the solutions is not described in detail here. It should be pointed out that for those skilled in the art, without departing from the content of the present invention, several deformations and improvements can still be made, which should also be regarded as the protection scope of the present invention, and these will not affect the implementation effect of the present invention and the practicability of the patent. The protection scope required by this application should be subject to the content of its claims, and the specific implementation manners and the like recorded in the description can be used to explain the content of the claims.

Claims

1. A bearing seat withdrawal device, characterized in that: The invention comprises a support rod (2) arranged at the center of a bearing seat (100), the support rod (2) being provided with a hollow jack (3) on its outer sleeve, a connecting plate (4) being installed on one end surface of the bearing seat (100), the connecting plate (4) comprising a central mounting hole (41) and a mounting wing plate (42) diverging outward from the central mounting hole (41); an annular mounting arm (43) protruding toward one side of the support rod (2) is provided at one end of the connecting plate (4) away from the bearing seat (100), and is used for mounting a pull plate (1); the pull plate (1) comprises a mounting end (11) connected to the mounting arm (43) and a stop end (12) arranged opposite to the mounting end (11), and the pull plate (1) is enclosed by the outer wall of the hollow jack (3); one end of the hollow jack (3) extends into the mounting arm (43), and the other end is close to the inner wall of the stop end (12).

2. The bearing seat withdrawal device according to claim 1, characterized in that: The support rod (2), the hollow jack (3), the pull plate (1) and the centre of the bearing seat are on the same horizontal line.

3. The bearing seat withdrawal device according to claim 2 is characterized in that: The pull plate (1) further comprises a curved connecting arm (13) connecting the mounting end (11) and the stop end (12); the mounting end (11) is a retaining edge nested in the mounting arm (43) and can be clamped on the inner end surface of the connecting plate (4).

4. The bearing seat withdrawal device according to claim 3 is characterized in that: The mounting arm (43) is provided with a U-shaped groove in the circumference, the retaining edge abuts against the U-shaped groove, and the diameter of the circle where the retaining edge is located is larger than the circumferential diameter of the bottom of the U-shaped groove, so as to facilitate fitting the pull plate (1) onto the connecting plate (4).

5. The bearing seat withdrawal device according to claim 3 is characterized in that: The stop end (12) is a plate body with an outer surface in an inverted U shape, and an inverted U-shaped support rod extension hole (14) is provided at the center of the plate body.

6. The bearing seat withdrawal device according to claim 1, characterized in that: The mounting wing plate (42) of the connecting plate (4) is a special-shaped plate that gradually narrows from the center outwards, and the outer edge end of the mounting wing plate (42) is provided with a step block (421) that protrudes toward the bearing seat (100) so as to fit firmly with the bearing seat (100).

7. The bearing seat withdrawal device according to claim 6, characterized in that: The inner diameter of the mounting arm (43) of the connecting plate (4) is larger than the outer wall of the hollow jack (3).

8. The bearing seat withdrawal device according to claim 7, characterized in that: The end surface of the bearing seat (100) is provided with a mounting convex ring (101), and the outer edge diameter of the mounting convex ring (101) is equal to the inner diameter of the step block (421).

9. The bearing seat withdrawal device according to claim 1, characterized in that: The support rod (2) comprises a connecting threaded end (21) and a rod body (22), a boss portion (23) being provided between the connecting threaded end (21) and the rod body (22), the boss portion being an annular body extending outward from the rod body (22), the outer edge diameter of the annular body being smaller than the inner diameter of the mounting arm (43), and being used to strengthen the force support for the hollow jack.

10. The bearing seat withdrawal device according to any one of claims 1 to 9, characterized in that: A handle (15) is provided on the outside of the pull plate (1).

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