Special tool for dismantling motor bearing

Abstract

The utility model relates to a special tool for dismantling a motor bearing, which relates to the technical field of motors and comprises a vertical support vertically supported on the ground, a dismantling puller horizontally arranged at the top of the vertical support and a horizontal support horizontally arranged in the middle of the vertical support and located on the lower side of the dismantling puller. The dismantling puller comprises a connecting sleeve, a dismantling oil cylinder coaxially connected to one end of the connecting sleeve, a sliding sleeve coaxially arranged on the connecting sleeve in a sliding and sleeving mode, a top sleeve connected to one end of the connecting sleeve and used for limiting the sliding sleeve, and three sets of drag hooks circumferentially and evenly distributed at the circumferential side end of the sliding sleeve at intervals, and a piston rod of the dismantling oil cylinder abuts against one end of a motor spindle. One end of the drag hook is hooked at one end of the motor bearing far away from the main shaft, and the upper end face of the horizontal support is horizontally and slidably provided with supporting sliding seats supporting two side ends of the lower side of the motor bearing along the length direction. The bearing dismounting device has the advantages that the supporting sliding seats move synchronously and support the motor bearing in the bearing dismounting process, so that a motor spindle is prevented from being damaged due to falling, and safety is higher.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, and in particular to a special tool for removing motor bearings. Background Technology

[0002] An electric motor generally includes a housing, a stator, and a rotor assembly. The rotor assembly includes a rotor and a shaft, which is assembled inside the housing. The motor rotor is typically fitted onto the motor shaft, and bearings are located at both ends of the motor shaft. During use, the motor bearings may deform due to heat and dry friction, causing them to clump together with the motor shaft. When the motor bearings require repair or warranty maintenance after prolonged use, they must be disassembled using a puller.

[0003] For small motor bearings, the entire motor can be removed first, followed by the bearing. However, for larger industrial motors, when the operator removes the bearing, the puller is fixed to one end of the motor shaft and the bearing is gradually pulled out. Once the bearing falls off the main shaft, the bearing and puller will instantly lose their support and are likely to fall onto the surface of the main shaft, causing damage to the main shaft. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] In view of the above-mentioned shortcomings and deficiencies of the prior art, this utility model provides a special tool for removing motor bearings, which solves the technical problem that when the puller pulls the bearing off the spindle, the bearing and the puller will instantly lose support and easily fall onto the surface of the spindle, thereby causing damage to the spindle.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, the main technical solutions adopted by this utility model include:

[0008] This utility model embodiment provides a special tool for removing motor bearings, including a vertical support supported vertically on the ground, a removal puller horizontally set at the top of the vertical support, and a horizontal support set horizontally in the middle of the vertical support and located below the removal puller. The removal puller includes a horizontally set connecting sleeve, a removal cylinder coaxially connected to one end of the connecting sleeve and having a piston rod coaxially passed through the other end of the connecting sleeve, a sliding sleeve coaxially slidably fitted on the connecting sleeve, a top sleeve threadedly connected to the end of the connecting sleeve away from the removal cylinder and restricting the sliding sleeve, and three sets of hooks evenly spaced circumferentially and rotatably connected to the periphery of the sliding sleeve. The piston rod of the removal cylinder coaxially abuts against one end of the motor spindle, and one end of the hook is hooked to the end of the motor bearing away from the spindle. The upper surface of the horizontal support is horizontally slidably set with support slides supporting the lower two ends of the motor bearing.

[0009] This utility model provides a special tool for removing motor bearings. When removing the bearing of an industrial motor using this tool, the vertical support is moved to one side of the motor, the motor end cover is removed to expose the bearing, the piston rod of the removal cylinder is coaxially abutted against one end of the motor spindle, and the top sleeve is turned so that the three sets of hooks are hooked onto the end of the bearing away from the vertical support, and the sliding sleeve abuts against the top sleeve. Then, the support slide is moved horizontally to support the lower two sides of the motor bearing, and the removal cylinder is activated, so that the piston rod of the removal cylinder extends. At this time, the three sets of hooks will pull the motor bearing towards one side of the vertical support. During the pulling process, the support slide moves synchronously and continuously supports the motor bearing until it is detached. The detached motor bearing will not directly detach under the support of the support slide, but will be suspended in the air above the motor spindle, thereby avoiding falling and damaging the motor spindle, making it safer.

[0010] Optionally, a first lifting bracket is vertically slidably disposed at the upper end of the vertical support, the connecting sleeve is fixed to the top of the first lifting bracket, a second lifting bracket is vertically slidably disposed at the side end of the vertical support, and the horizontal support is fixed to the top of the second lifting bracket.

[0011] By vertically sliding a first lifting bracket at the upper end of the vertical support, the entire demolition puller becomes vertically adjustable. At the same time, a second lifting bracket is vertically sliding at the side end of the vertical support, making the horizontal support vertically adjustable. This allows the tool to accommodate demolition pullers of adjustable height, making it more convenient to disassemble motor bearings of various models and heights.

[0012] Optionally, both of the support slides are less than one-third of an arc shape, and the inner arc side of the support slide is provided with a groove into which the motor bearing is partially embedded. The support slide is provided with a protective rubber layer on the inner wall of the groove to abut against the surface of the motor bearing.

[0013] By setting the support slide to an arc shape of less than one-third, the support slide can be supported on the side of the motor bearing and located between adjacent hooks. At the same time, a groove is opened on the inner arc side of the support slide and a protective rubber layer is set, so that the support slide can more stably support and protect the motor bearing.

[0014] Optionally, the upper surface of the horizontal support is provided with two parallel "T"-shaped grooves spaced apart along the length direction. The support slide includes a slider that is slidably inserted into the "T"-shaped groove, a support rod that is vertically disposed on the top of the slider, a support disposed on the top of the support rod, and two halves of the support that are slidably connected to the top of the support along the length direction of the horizontal support. A tension spring is connected between the two halves of the support to pull the two halves of the support towards the center and clamp the motor bearing in the groove.

[0015] By pulling the two halves of the seat closer together using a tension spring, the width of the groove can be varied, making this special tool more convenient to fit motor bearings of different thicknesses.

[0016] Optionally, the support is rotatably connected to the top of the support rod, and the rotation axis of the support is parallel to the length direction of the horizontal support.

[0017] By rotating the support to the top of the support rod, the support slide can automatically adapt to and support motor bearings of different diameters, making it more convenient.

[0018] Optionally, a compression spring is embedded in the "T"-shaped groove, and one end of the compression spring abuts against the end of the slider near the vertical support.

[0019] By embedding a compression spring in the "T"-shaped groove, the compression spring continuously abuts against the slider and pushes the slider to move away from the vertical support. When the motor bearing falls off the motor shaft, the support slide supports the motor bearing vertically and along the motor shaft under the action of the compression spring, thereby reducing the probability of collision during the fall and making it safer.

[0020] Optionally, the connecting sleeve is detachably connected to the top of the first lifting bracket, and the horizontal bracket is detachably connected to the top of the second lifting bracket.

[0021] By detachably connecting the connecting sleeve to the top of the first lifting bracket and detachably connecting the horizontal bracket to the top of the second lifting bracket, both the puller and the horizontal bracket can be disassembled and stored when not in use, and installed on-site when in use, which is more convenient.

[0022] Optionally, a stabilizing bracket extending to one side of the horizontal bracket is horizontally provided at the lower end of the vertical bracket, and a plurality of traveling rollers are provided at the lower end of the stabilizing bracket.

[0023] By installing a stabilizing bracket horizontally at the lower end of the vertical support, the stabilizing bracket extends to the side of the horizontal support, thus providing better support for the vertical support, horizontal support, and dismantling puller. In addition, the bottom traveling rollers make the entire tool easier to move for dismantling large motor bearings.

[0024] Optionally, rotating columns are evenly spaced vertically at circumferential intervals on the periphery of the connecting sleeve, and rotating plates are rotatably connected to both ends of the rotating columns. One end of the hook is rotatably connected to the middle of the two rotating plates in the same group away from the rotating columns.

[0025] By vertically and evenly spaced rotating columns on the circumferential side of the connecting sleeve, and rotating plates rotatably connected to both ends of the rotating columns, the hook is rotatably connected to the connecting sleeve through the rotating plates. This allows the hook to more easily remove the motor bearing when the removal puller is in operation, as it hooks onto one end of the bearing at an angle, making the removal work easier and more convenient.

[0026] (III) Beneficial Effects

[0027] The beneficial effects of this utility model are as follows: This utility model's special tool for removing motor bearings allows for the following steps: When removing the bearing of an industrial motor using this tool, the vertical support is moved to one side of the motor, the motor end cover is removed, exposing the bearing. The piston rod of the removal cylinder is coaxially abutted against one end of the motor spindle. The top sleeve is turned, causing the three sets of hooks to hook onto the bearing at the end furthest from the vertical support. The sliding sleeve then abuts against the top sleeve. The support slide is then moved horizontally to support both sides of the lower end of the motor bearing. The removal cylinder is activated, causing the piston rod to extend. At this point, the three sets of hooks will pull the motor bearing towards the vertical support. During the pulling process, the support slide moves synchronously and continuously supports the motor bearing until it is detached. The detached motor bearing, supported by the support slide, will not directly detach but will remain suspended above the motor spindle, thus preventing it from falling and damaging the motor spindle, making it safer. Attached Figure Description

[0028] Figure 1 This is a perspective view of an embodiment of the present utility model;

[0029] Figure 2 This is a perspective view of a second embodiment of the present invention.

[0030] [Explanation of Labels in the Attached Image]

[0031] 1. Vertical support; 11. First lifting support; 12. Second lifting support; 13. Stabilizing support; 131. Traveling roller; 2. Removal puller; 21. Connecting sleeve; 22. Removal cylinder; 23. Sliding sleeve; 24. Top sleeve; 25. Hook; 26. Rotating column; 27. Rotating plate; 3. Horizontal support; 31. "T" shaped slide; 32. Compression spring; 4. Support slide; 41. Sliding block; 42. Support rod; 43. Support; 44. Half seat; 441. Groove; 442. Protective rubber layer; 45. Tension spring. Detailed Implementation

[0032] To better explain and facilitate understanding of this utility model, the present utility model will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0033] The utility model embodiment proposes a special tool for removing motor bearings. When removing the bearing of an industrial motor using this special tool, the vertical support is moved to one side of the motor, the motor end cover is removed, exposing the bearing, the piston rod of the removal cylinder is coaxially abutted against one end of the motor spindle, the top sleeve is turned, so that the three sets of hooks are respectively hooked onto the end of the bearing away from the vertical support, and the sliding sleeve abuts against the top sleeve. Then, the support slide is moved horizontally to support the lower two sides of the motor bearing, the removal cylinder is activated, so that the piston rod of the removal cylinder extends. At this time, the three sets of hooks will pull the motor bearing towards one side of the vertical support. During the pulling process, the support slide moves synchronously and continuously supports the motor bearing until it is pulled off. The pulled-off motor bearing will not directly detach under the support of the support slide, but will be suspended in the air above the motor spindle, thereby avoiding falling and damaging the motor spindle, making it safer.

[0034] To better understand the above technical solutions, exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that the present invention can be understood more clearly and thoroughly, and that the scope of the present invention can be fully conveyed to those skilled in the art.

[0035] Reference Figure 1 and Figure 2 A special tool for removing motor bearings includes a vertical support 1 that is vertically supported on the ground, a removal puller 2 that is horizontally set on top of the vertical support 1, and a horizontal support 3 that is horizontally set in the middle of the vertical support 1 and located below the removal puller 2.

[0036] A first lifting bracket 11 is vertically slidable at the upper end of the vertical support 1 via a cylinder, and a second lifting bracket 12 is vertically slidable at the side end of the vertical support 1 via a cylinder. A removal puller 2 is detachably connected to the top of the first lifting bracket 11 via bolts, and a horizontal support 3 is detachably connected to the top of the second lifting bracket 12 via bolts. This allows both the removal puller 2 and the horizontal support 3 to be disassembled and stored when not in use, and installed on-site when needed, making it more convenient. Furthermore, the vertical adjustability of the entire removal puller 2 and the horizontal support 3 allows this specialized tool to disassemble bearings of various models and heights, making disassembly even more convenient.

[0037] A stabilizing bracket 13 extending towards the horizontal bracket 3 is horizontally welded to the lower end of the vertical bracket 1. Multiple traveling rollers 131 are rotatably connected to the lower end of the stabilizing bracket 13 via bearings. This allows the stabilizing bracket 13 to better support the vertical bracket 1, the horizontal bracket 3, and the removal puller 2. In conjunction with the traveling rollers 131 at the bottom, the entire tool can be moved more easily to remove the bearings of large motors.

[0038] The removal puller 2 includes a horizontally arranged connecting sleeve 21, a removal cylinder 22 coaxially connected to one end of the connecting sleeve 21 with a piston rod coaxially passing through the other end of the connecting sleeve 21, a sliding sleeve 23 coaxially slidably fitted on the connecting sleeve 21, a top sleeve 24 threadedly connected to the end of the connecting sleeve 21 away from the removal cylinder 22 and restricting the sliding sleeve 23, and three sets of pull hooks 25 evenly spaced circumferentially and rotatably connected to the circumferential ends of the sliding sleeve 23. When removing the bearing of an industrial motor using this special tool, move the vertical support 1 to one side of the motor, remove the motor end cover to expose the bearing, and coaxially abut the piston rod of the removal cylinder 22 against one end of the motor spindle. Turn the top sleeve 24 so that the three sets of hooks 25 are hooked onto the end of the bearing away from the vertical support 1. The sliding sleeve 23 abuts against the top sleeve 24. Activate the removal cylinder 22 so that the piston rod of the removal cylinder 22 extends. At this time, the three sets of hooks 25 will pull the motor bearing towards one side of the vertical support 1 until the bearing is detached from the spindle.

[0039] Rotating columns 26 are vertically welded at even intervals around the circumference of the connecting sleeve 21. Rotating plates 27 are rotatably connected to both ends of the rotating columns 26. One end of the pull hook 25 is rotatably connected to the middle of the two rotating plates 27 in the same group, away from the rotating columns 26. This allows the pull hook 25 to be rotatably connected to the connecting sleeve 21 through the rotating plates 27. When the puller 2 is in operation, the pull hook 25 can more easily remove the motor bearing by hooking it at one end of the bearing, making the removal work easier and more convenient.

[0040] The upper surface of the horizontal support 3 is horizontally slidably provided with a support slide 4 supporting the lower two ends of the motor bearing. The upper surface of the horizontal support 3 is provided with two parallel "T"-shaped grooves 31 at intervals along the length direction. The support slide 4 includes a slider 41 that is slidably inserted into the "T"-shaped groove 31, a support rod 42 that is vertically provided on the top of the slider 41, a support 43 provided on the top of the support rod 42, and two half-seats 44 that are slidably connected to the top of the support 43 along the length direction of the horizontal support 3. A tension spring 45 is connected between the two half-seats 44 to pull the two half-seats 44 towards the center and clamp the motor bearing in the groove 441. The half-seats 44 are all arc-shaped with less than one-third of their length. The inner arc side of the half-seats 44 in the same group is provided with a groove 441 into which the motor bearing is partially embedded. The inner wall of the groove 441 is bonded with a protective adhesive layer 442 that abuts against the surface of the motor bearing. The two halves of the seat 44 are pulled closer together by the tension spring 45, so that the width of the groove 441 can be changed, thus making the special tool more convenient to adapt to motor bearings of different thicknesses. At the same time, the half seat 44 is set to an arc shape of less than one-third, so that it can be supported on the side of the motor bearing and located between the adjacent hooks 25. Meanwhile, the protective adhesive layer 442 is bonded in the groove 441, so that the support slide 4 can more stably support and protect the motor bearing.

[0041] Support 43 is rotatably connected to the top of support rod 42, and the axis of rotation of support 43 is parallel to the length direction of horizontal bracket 3. This allows support slide 4 to adapt to and support motor bearings of different diameters, making it more convenient.

[0042] A compression spring 32 is embedded in the "T"-shaped groove 31. One end of the compression spring 32 abuts against the end of the slider 41 near the vertical support 1. The compression spring 32 continuously abuts against the slider 41 and pushes the slider 41 to move away from the vertical support 1. This allows the support slide 4 to support the motor bearing vertically while simultaneously supporting it along the motor shaft direction under the action of the compression spring 32 when the motor bearing detaches from the motor shaft. This reduces the probability of collision during the detachment process and makes it safer.

[0043] In the description of this utility model, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0044] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0045] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "beneath" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0046] In the description of this specification, the terms "one embodiment," "some embodiments," "embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0047] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make modifications, alterations, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A special tool for removing motor bearings, characterized in that: The device includes a vertical support (1) that is vertically supported on the ground, a demolition puller (2) that is horizontally set on top of the vertical support (1), and a horizontal support (3) that is horizontally set in the middle of the vertical support (1) and located below the demolition puller (2). The demolition puller (2) includes a horizontally set connecting sleeve (21), a demolition cylinder (22) that is coaxially connected to one end of the connecting sleeve (21) and has a piston rod that coaxially passes through the other end of the connecting sleeve (21), and a sliding sleeve (23) that is coaxially slidably fitted on the connecting sleeve (21). The top sleeve (24) of the connecting sleeve (21) is threaded to the end away from the dismantling cylinder (22) and restricts the sliding sleeve (23). There are three sets of hooks (25) that are evenly spaced around the circumference and rotatably connected to the side of the sliding sleeve (23). The piston rod of the dismantling cylinder (22) is coaxially abutted against one end of the motor spindle. One end of the hook (25) is hooked to the end of the motor bearing away from the spindle. The upper surface of the horizontal bracket (3) is horizontally slidably provided with a support slide (4) supporting the lower two sides of the motor bearing.

2. The special tool for removing motor bearings as described in claim 1, characterized in that: The vertical support (1) is vertically slidably provided with a first lifting support (11) at its upper end, the connecting sleeve (21) is fixed to the top of the first lifting support (11), the vertical support (1) is vertically slidably provided with a second lifting support (12) at its side end, and the horizontal support (3) is fixed to the top of the second lifting support (12).

3. The special tool for removing motor bearings as described in claim 2, characterized in that: Both of the support slides (4) are less than one-third of an arc shape. The inner arc side of the support slide (4) is provided with a groove (441) into which the motor bearing is embedded. The inner wall of the groove (441) of the support slide (4) is provided with a protective rubber layer (442) that abuts against the surface of the motor bearing.

4. The special tool for removing motor bearings as described in claim 3, characterized in that: The upper surface of the horizontal support (3) is provided with two parallel "T"-shaped grooves (31) spaced apart along the length direction. The support slide (4) includes a slider (41) that is slidably inserted into the "T"-shaped groove (31), a support rod (42) that is vertically set on the top of the slider (41), a support (43) set on the top of the support rod (42), and two halves (44) that are slidably connected to the top of the support (43) along the length direction of the horizontal support (3). A tension spring (45) is connected between the two halves (44) to pull the two halves (44) towards the center and clamp the motor bearing in the groove (441).

5. The special tool for removing motor bearings as described in claim 4, characterized in that: The support (43) is rotatably connected to the top of the support rod (42), and the rotation axis of the support (43) is parallel to the length direction of the horizontal bracket (3).

6. The special tool for removing motor bearings as described in claim 4, characterized in that: The "T"-shaped groove (31) is fitted with a compression spring (32), one end of which abuts against the end of the slider (41) near the vertical support (1).

7. The special tool for removing motor bearings as described in claim 2, characterized in that: The connecting sleeve (21) is detachably connected to the top of the first lifting bracket (11), and the horizontal bracket (3) is detachably connected to the top of the second lifting bracket (12).

8. The special tool for removing motor bearings as described in claim 1, characterized in that: The vertical support (1) is horizontally provided with a stabilizing support (13) extending to one side of the horizontal support (3) at its lower end, and the stabilizing support (13) is provided with a plurality of traveling rollers (131) at its lower end.

9. The special tool for removing motor bearings as described in claim 1, characterized in that: The connecting sleeve (21) has rotating columns (26) evenly spaced vertically on its circumferential side. Rotating plates (27) are rotatably connected to both ends of the rotating columns (26). One end of the hook (25) is rotatably connected to the middle of the two rotating plates (27) in the same group away from the rotating columns (26).

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