Bearing dismounting device of motor

Abstract

The utility model relates to the field of bearing dismounting, in particular to a motor bearing dismounting device, which comprises a fixed seat and a threaded rod in threaded fit with the fixed seat, two groups of pull rods are symmetrically arranged on two sides of the threaded rod of the fixed seat in parallel, and distance adjusting holes are uniformly formed in the fixed seat at intervals along the distance direction between the two pull rods. The distance adjusting hole and the threaded rod are arranged in parallel; the pull rod slides along the distance adjusting hole and then is fixed; a right-angle-shaped drag hook is arranged at the rod end of each pull rod, the drag hooks and a positioning ring coaxially arranged with the threaded rod are in sliding fit with the two pull rods, the positioning ring slides along the pull rods until the positioning ring abuts against a bearing to be disassembled and then is locked by a locking nut, and the drag hooks are matched with the ring face of the positioning ring to form a U-shaped clamping face to clamp the bearing to be disassembled. According to the bearing dismounting tool, the stability in the bearing dismounting process is greatly improved, and the bearing is not prone to being damaged.

Description

Technical Field

[0001] This utility model relates to the field of bearing disassembly, specifically a bearing disassembly device for an electric motor. Background Technology

[0002] Traditional electric motors all have bearings mounted on their shafts, which support the motor shaft. During disassembly and maintenance, the bearings need to be removed from the motor shaft. This disassembly process requires specialized bearing removal tools, such as a bearing puller: consisting of pull claws, a screw, and a handle. In use, the pull claws are fixed to the inner ring of the bearing, and then the screw is rotated to generate pulling force, thereby pulling the bearing off the shaft. Another example is a sliding hammer removal tool: including a sliding hammer and a puller assembly. In use, the puller assembly is fixed to the bearing, and then the sliding hammer is used to strike the tail of the puller assembly, using impact force to pull the bearing off the shaft. Yet another example is a hydraulic puller: utilizing hydraulic principles to generate powerful pulling force, used for disassembling large or heavy bearings. In use, the pull claws of the hydraulic puller are fixed to the bearing, and then the hydraulic pump is operated to generate pulling force, pulling the bearing out.

[0003] Taking the publication number "CN117086820A" as an example, its structure is a type of puller tool, including a puller base, a puller screw, and several pull claws. The pull claws hook onto one end of the bearing, and then a worm gear structure applies pressure to the rotating shaft, causing the bearing to detach from the motor shaft axially. Although these disassembly tools differ in some details, they can be summarized as first hooking one end of the bearing with the pull claws, and then applying a reverse pressure to the rotating shaft through a linear power source. The problem with this disassembly method is that the multiple sets of pull claws have point-like contact with the bearing. When applying pressure to the rotating shaft and removing the bearing, the small contact area of ​​the pull claws results in high local pressure on the bearing, easily damaging it. Furthermore, due to the small contact area, slippage easily occurs between the pull claws and the bearing during the removal process, leading to insufficient stability in the disassembly process. Therefore, this issue urgently needs to be addressed. Utility Model Content

[0004] To avoid and overcome the technical problems existing in the prior art, this utility model provides a bearing disassembly device for an electric motor. This utility model significantly improves the stability of the bearing disassembly process and is less likely to damage the bearing.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A bearing disassembly device for an electric motor includes a fixed base and a threaded rod that is threaded into the fixed base. The fixed base has two sets of pull rods arranged symmetrically on both sides of the threaded rod. Adjustment holes are evenly spaced on the fixed base along the distance between the two pull rods. The adjustment holes are arranged parallel to the threaded rod. The pull rod is fixed after sliding along the adjustment holes. A right-angled hook is provided at the end of the pull rod. A positioning ring arranged coaxially with the threaded rod slides with the two pull rods. The positioning ring slides along the pull rod until it abuts against the bearing to be disassembled and is locked by a locking nut. The hook and the ring surface of the positioning ring cooperate to form a U-shaped clamping surface to clamp the bearing to be disassembled.

[0007] As a further embodiment of this utility model: a detachable adjusting plate is snapped onto the end of the fixed seat away from the hook. The adjusting plate is snapped onto the fixed seat. Each adjusting hole is opened on the adjusting plate. The fixed seat has guide holes corresponding to the positions of the adjusting holes for the pull rod to pass through. The diameter of the guide holes is larger than the diameter of each adjusting hole. The pull rod body is provided with a threaded section. The pull rod is locked onto the adjusting plate by the fastening nut of the threaded section.

[0008] As a further improvement of this utility model: the hook and the pull rod are detachably coupled and are fixed by threaded engagement with the pull rod along the length of the pull rod.

[0009] As a further embodiment of this utility model: the ends of the adjacent hooks of the threaded rod are coaxially provided with a push rod, and the push rod is coaxially rotated with the threaded rod through a push rod bearing.

[0010] As a further improvement of this utility model, the top end of the push rod is provided with an arc-shaped rubber head.

[0011] As a further improvement of this utility model, the working surfaces of both the positioning ring and the hook are made of rubber.

[0012] As a further improvement of this utility model, an adjusting nut is coaxially fixed at the end of the threaded rod away from the push rod.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. This utility model allows the two sets of pull rods to be freely adjusted in distance through spaced adjustment holes to accommodate the disassembly of bearings of different sizes. After adjustment to the appropriate position, the right-angle hook of the pull rod and the positioning ring clamp and fix the bearing. Then, the threaded rod is screwed until the bearing to be disassembled is pulled out from the motor shaft. During the disassembly process, the bearing to be disassembled is always clamped, which improves the stability of the disassembly process and increases the contact area with the bearing, making it less likely to damage the bearing.

[0015] 2. This utility model features a detachable adjustment plate on the fixed base, with the adjustment hole directly set on the adjustment plate. Different sizes of adjustment plates can be replaced to accommodate different sizes of the pull rod. After adjusting the position of the pull rod, the adjustment plate and pull rod are locked by tightening the nut, so that the bearing can receive a stable clamping force and avoid shaking during the clamping process. The detachable design of the hook can be adapted to clamping and fixing bearings of different sizes.

[0016] 3. The push rod of this utility model is rotated with the threaded rod through the bearing. When the threaded rod rotates, the push rod remains stationary, avoiding damage to the motor shaft during the rotation process. The rubber head at the end of the push rod provides flexible support and protection for the motor shaft.

[0017] 4. The clamping surfaces of the hook and positioning ring for the bearing are made of rubber to avoid damage to the bearing when clamping it; the adjusting nut at the end of the threaded rod facilitates the application of rotational force to the threaded rod. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model.

[0019] In the picture:

[0020] 1. Fixed base; 2. Adjusting plate; 21. Adjustment hole;

[0021] 3. Pull rod; 31. Pull hook; 32. Fastening nut; 33. Positioning ring; 34. Locking nut;

[0022] 4. Threaded rod; 41. Push rod; 42. Rubber head; 43. Push rod bearing; 44. Adjusting nut. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figure 1 In this embodiment of the present invention, a bearing disassembly device for an electric motor includes a fixed base 1 and a threaded rod 4 arranged along the central axis of the fixed base 1. The threaded rod 4 is threadedly engaged with the fixed base 1 and its end is coaxially fixed with an adjusting nut 44 to facilitate screwing the threaded rod 4.

[0025] A push rod bearing 43 is coaxially mounted on the end of the threaded rod 4. A push rod 41 is fixed to the inner ring of the push rod bearing 43, and the push rod 41 is rotatably engaged with the threaded rod 4. When the push rod 41 abuts against the motor shaft, the push rod 41 can remain stationary while the threaded rod 4 rotates through the bearing. To further enhance the protection of the motor shaft, a rubber head 42 is provided at the end of the push rod 41.

[0026] Two sets of tie rods 3 are symmetrically arranged on both sides of the threaded rod 4 on the fixed base 1, and the rod body of the tie rod 3 is arranged parallel to the rod body of the threaded rod 4.

[0027] One end of the adjacent top rod 41 of the pull rod 3 is provided with a detachable hook 31. The hook 31 is a right-angle hook. The disassembly and assembly methods are not limited. After insertion, it can be positioned by a pin or by a thread. It is preferred to fix it coaxially with the pull rod 3 by a thread.

[0028] An adjusting plate 2 is provided at the end of the fixed base 1 away from the hook 31. A rectangular slot can be opened on the fixed base 1 so that the adjusting plate 2 can be snapped into the fixed base 1. Adjusting holes 21 are provided at intervals along the length of the plate on the adjusting plate 2. A guide hole corresponding to the position of the adjusting hole 21 is opened on the fixed base 1. After the pull rod 3 passes through the adjusting hole 21 and the guide hole in sequence, the hook 31 is installed at the end of the pull rod 3.

[0029] The diameter of the guide hole on the fixed base 1 is preferably slightly larger than the diameter of the adjusting hole 21. The rod body of the pull rod 3 is provided with a threaded section, on which a fastening nut 32 is installed for locking the adjusting plate 2. A positioning ring 33 is also provided on the rod body of the pull rod 3. The positioning ring 33 is arranged coaxially with the threaded rod 4. The rod bodies of both pull rods 3 pass through the annular surface of the positioning ring 33 and slide in cooperation with the positioning ring 33 along the length of the pull rod 3. When the positioning ring 33 slides along the pull rod 3 until it abuts against the bearing to be disassembled, the hook 31 and the positioning ring 33 clamp and fix the bearing to be disassembled. After clamping, the positioning ring 33 is locked by the locking nut 34 on the pull rod 3 to prevent it from continuing to slide along the pull rod 3. The inner diameter of the positioning ring 33 must be larger than the diameter of the motor shaft.

[0030] To avoid damaging the bearing to be disassembled, the clamping surfaces of the hook 31 and the positioning ring 33 are made of rubber. After clamping and fixing the bearing to be disassembled, continue to turn the threaded rod 4 until the bearing to be disassembled is pulled off the motor shaft.

[0031] The basic principles of this application have been described above with reference to specific embodiments. However, it should be noted that the advantages, benefits, and effects mentioned in this application are merely examples and not limitations, and should not be considered as essential features of each embodiment of this application. Furthermore, the specific details disclosed above are for illustrative and facilitative purposes only, and are not limitations. These details do not limit the application to the necessity of employing the aforementioned specific details for implementation.

[0032] The block diagrams of devices, apparatuses, devices, and systems involved in this application are merely illustrative examples and are not intended to require or imply that they must be connected, arranged, or configured in the manner shown in the block diagrams. As those skilled in the art will recognize, these devices, apparatuses, devices, and systems can be connected, arranged, and configured in any manner. Words such as “comprising,” “including,” “having,” etc., are open-ended terms meaning “including but not limited to,” and are used interchangeably with them. The terms “or” and “and” as used herein refer to the terms “and / or,” and are used interchangeably with them unless the context clearly indicates otherwise. The term “such as” as used herein refers to the phrase “such as but not limited to,” and is used interchangeably with it.

Claims

1. A bearing disassembly device for an electric motor, characterized in that, The device includes a fixed base (1) and a threaded rod (4) that is threaded to the fixed base (1). The fixed base (1) has two sets of pull rods (3) arranged symmetrically on both sides of the threaded rod (4). The fixed base (1) has evenly spaced adjustment holes (21) along the distance between the two pull rods (3). The adjustment holes (21) are arranged parallel to the threaded rod (4). The pull rod (3) slides along the adjustment hole (21) and is then fixed. The end of the pull rod (3) is provided with a right-angled hook (31). The positioning ring (33) arranged coaxially with the threaded rod (4) slides with the two pull rods (3). The positioning ring (33) slides along the pull rod (3) until it comes into contact with the bearing to be disassembled and is then locked by the locking nut (34). The hook (31) and the ring surface of the positioning ring (33) cooperate to form a U-shaped clamping surface to clamp the bearing to be disassembled.

2. The bearing disassembly device for an electric motor according to claim 1, characterized in that, A detachable adjusting plate (2) is snapped onto the end of the fixed base (1) away from the hook (31). The adjusting plate (2) is snapped onto the fixed base (1). Each adjusting hole (21) is opened on the adjusting plate (2). The fixed base (1) is provided with a guide hole corresponding to the position of the adjusting hole (21) for the pull rod (3) to pass through. The diameter of the guide hole is larger than the diameter of each adjusting hole (21). The pull rod (3) has a threaded section on its body. The pull rod (3) is locked onto the adjusting plate (2) by the fastening nut (32) of the threaded section.

3. A bearing disassembly device for an electric motor according to claim 1 or 2, characterized in that, The hook (31) and the pull rod (3) are detachably connected and are threadedly connected to the pull rod (3) along the length of the pull rod (3) for fixation.

4. A bearing disassembly device for an electric motor according to claim 1 or 2, characterized in that, The threaded rod (4) is coaxially provided with a top rod (41) at the rod end of the hook (31) adjacent to it. The top rod (41) is coaxially rotated with the threaded rod (4) through a top rod bearing (43).

5. The bearing disassembly device for an electric motor according to claim 4, characterized in that, The top of the push rod (41) is provided with an arc-shaped rubber head (42).

6. A bearing disassembly device for an electric motor according to claim 1 or 2, characterized in that, The working surfaces of the positioning ring (33) and the hook (31) are both made of rubber.

7. A bearing disassembly device for an electric motor according to claim 1 or 2, characterized in that, An adjusting nut (44) is coaxially fixed at the end of the threaded rod (4) away from the push rod (41).

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