A tool for dismounting a shaft bearing

Abstract

The utility model relates to bearing dismounting technical field, concretely relates to a kind of tool for shaft body bearing dismounting, comprising: clamping portion, the outside of the shaft body is set, inside can be connected bearing;Connecting rod, setting in clamping portion both sides;Connecting plate, with connecting rod is connected, and located the one end of shaft body;And push part, setting in the middle part of connecting rod, one end abuts in the end of shaft body;The utility model has the beneficial effect that: the present application is stabilized by clamping portion and cooperates push part to provide controllable axial thrust, effectively avoid the instantaneous impact and radial component force generated by traditional hammering or crowbar operation, the stable dismounting of bearing is realized.

Description

Technical Field

[0001] This utility model belongs to the field of bearing disassembly, and specifically relates to a tool for disassembling shaft bearings. Background Technology

[0002] In equipment maintenance and repair work, bearing disassembly is a common and critical task. Currently, the commonly used traditional methods for disassembling bearings installed on the outside of the shaft include directly striking with a hammer, prying with a pry bar, or pulling with a puller.

[0003] However, these traditional methods have significant inherent drawbacks. First, they are prone to uneven force application and poor centering during the application of force. Whether it is the impact force of a hammer or the static pulling force of a puller, if the direction of the force is not parallel to the axis, it will create a harmful eccentric force. This eccentric force will directly cause uneven stress on the inner ring of the bearing, which not only increases the disassembly resistance, but may also cause scratches on the journal surface, deformation or even breakage of the inner ring of the bearing, thereby damaging core components and increasing subsequent maintenance costs.

[0004] Therefore, there is an urgent need in the field for a specialized disassembly tool that can overcome the above-mentioned shortcomings. It must be able to ensure that the disassembly force is always evenly distributed along the axial direction in order to protect the integrity of the shaft and bearing. Utility Model Content

[0005] To address the aforementioned problems, this utility model provides a tool for disassembling shaft bearings, thereby achieving the objective of resolving the issues raised in the background art.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a tool for disassembling a shaft bearing, used to disassemble the bearing outside the shaft, comprising: a clamping part, sleeved on the outside of the shaft, which can hold the bearing inside; a connecting rod, disposed on both sides of the clamping part; a connecting plate, connected to the connecting rod and located at one end of the shaft; and a pushing part, disposed in the middle of the connecting rod, with one end abutting against the end of the shaft.

[0007] As a further improvement to the above technical solution:

[0008] The clamping part includes: a housing, of which two are provided, the two housings being hinged together and locked by quick-release bolts; and a neck, which is composed of a plurality of semi-annular sleeves arranged in concentric circles.

[0009] The housing and sleeves, as well as multiple sleeves, are connected by locking blocks and slots.

[0010] The connecting rod is hinged to both sides of the clamping part, and the end of the connecting plate is provided with an opening groove for use with the connecting rod.

[0011] The pushing part includes a screw threadedly connected inside the connecting plate.

[0012] The pushing part further includes: a pad block, which is rotatably connected to the end of the screw, and the area of ​​the pad block that is in contact with one side of the shaft is larger than the cross-sectional area of ​​the screw.

[0013] The pushing part further includes a force-receiving block, which is fixedly connected to the end of the screw away from the shaft and is in the shape of a regular hexagon.

[0014] The minimum inner diameter of the clamping part is greater than the outer diameter of the shaft, and the minimum inner diameter of the clamping part is less than the maximum outer diameter of the bearing.

[0015] The beneficial effects of this utility model embodiment are as follows:

[0016] This application uses a clamping part to stably engage the bearing and a pushing part to provide controllable axial thrust, effectively avoiding the instantaneous impact and radial force generated by traditional hammering or prying operations, thus achieving smooth disassembly of the bearing.

[0017] The hinged design of the connecting rod allows it to adaptively adjust to changes in the angle of the clamping part or shaft during disassembly, ensuring that the applied disassembly force is always evenly distributed axially. The slotted opening at the end of the connecting plate mates with the connecting rod, providing additional adjustment freedom and avoiding stress concentration problems caused by rigid fixing. This not only solves the problem of uneven force application but also significantly improves tool centering and adaptability, effectively protecting the shaft and bearings from damage.

[0018] Multiple semi-annular sleeves in the neck are joined together and arranged concentrically to form an adjustable inner diameter structure, which can be flexibly adjusted according to actual needs. This allows the clamping part to adapt to shafts of different sizes and fit tightly with the bearing. The evenly distributed force application effectively eliminates eccentric force and protects the shaft and bearing from damage. Attached Figure Description

[0019] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0020] Figure 1 This is a first-view structural schematic diagram of the present invention;

[0021] Figure 2 This is a structural schematic diagram of the present invention from a second perspective;

[0022] Figure 3 This is a schematic diagram of the structure of the housing of this utility model when it is opened;

[0023] Figure 4 This is a reference diagram showing the usage state of this utility model.

[0024] In the diagram: 1. Clamping part; 2. Opening slot; 3. Connecting rod; 4. Connecting plate; 5. Pushing part;

[0025] 11. Housing; 12. Quick-release bolt; 13. Neck; 14. Sleeve; 15. Clamp; 16. Slot;

[0026] 51. Screw; 52. Pad; 53. Load-bearing block. Detailed Implementation

[0027] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the invention. Furthermore, it should be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings.

[0028] See Figures 1 to 4 This utility model discloses a tool for disassembling a shaft bearing, used to disassemble the bearing outside the shaft, including: a clamping part 1, which is sleeved on the outside of the shaft and can hold the bearing inside; a connecting rod 3, which is disposed on both sides of the clamping part 1; a connecting plate 4, which is connected to the connecting rod 3 and located at one end of the shaft; and a pushing part 5, which is disposed in the middle of the connecting rod 3 and has one end abutting against the end of the shaft.

[0029] The clamping part 1 can be understood as a structure for fixing the bearing, and its main function is to securely restrict the bearing in a predetermined position by encircling it. Specifically, the clamping part 1 can be formed by splicing arc-shaped pieces, and these arc-shaped pieces can be fastened together by bolts.

[0030] As a key component for force transmission, the connecting rod 3 primarily functions to rigidly connect the clamping part 1 to the connecting plate 4, thereby forming a stable support frame. Specifically, the connecting rod 3 can be made of metal rods, composite material rods, or other materials with sufficient strength and rigidity.

[0031] The purpose of the connecting plate 4 is to provide a mounting base to facilitate the installation and application of force to the pushing part 5. In practical applications, the connecting plate 4 can adopt a flat plate structure or other geometric structures adapted to the shape of the shaft end. For example, a through hole or groove can be provided in the middle of the connecting plate 4 to accommodate the mounting components of the pushing part 5.

[0032] The core function of the pusher unit 5 is to apply axial thrust to achieve a smooth withdrawal of the bearing from the outside of the shaft. Specifically, the pusher unit 5 can apply axial thrust through a hydraulic cylinder, a pneumatic cylinder, or a mechanical screw mechanism. For example, when using a hydraulic cylinder, the piston rod of the hydraulic cylinder can directly abut against the end of the shaft, and the magnitude and direction of the thrust can be controlled by the hydraulic system; when using a mechanical screw mechanism, the screw can be driven to move axially by rotating the handle, thereby gradually applying thrust.

[0033] This application, through the coordinated design of the clamping part 1, connecting rod 3, connecting plate 4, and pushing part 5, ensures that the disassembly force is strictly and evenly distributed along the axial direction, fundamentally avoiding the generation of eccentric force. Compared with the uneven force caused by hammering or prying in traditional methods, the tool proposed in this embodiment can maintain the alignment of the bearing and shaft during disassembly, thereby effectively preventing scratches on the journal surface and deformation or breakage of the bearing inner ring.

[0034] The working principle of the above embodiment is as follows: The clamping part 1 is sleeved on the outside of the shaft, and the bearing is clamped inside, so that the bearing is firmly held and fixed, preventing displacement or shaking caused by local force during disassembly, and effectively maintaining centering. Furthermore, the connecting rod 3 is arranged on both sides of the clamping part 1, forming a symmetrical layout, connecting the clamping part 1 and the connecting plate 4 to form a stable support frame, ensuring the symmetry of the force transmission path and preventing imbalance caused by unilateral force. The connecting plate 4 is connected to the connecting rod 3 and located at one end of the shaft, serving as the mounting base for the pushing part 5, so that the point of application of the thrust is precisely aligned with the center of the shaft end face, ensuring that the direction of the force is strictly parallel to the axis. Specifically, the pushing part 5 is located in the middle of the connecting rod 3, with one end abutting against the end of the shaft, directly applying axial thrust to push the bearing out of the shaft, avoiding the impact and eccentricity effect caused by traditional knocking or pulling methods, and achieving a smooth and uniform disassembly process. Therefore, this tool can fundamentally solve the problems of uneven force application and poor centering during bearing disassembly, protecting the integrity of the shaft and bearing.

[0035] This application further proposes that the clamping part 1 includes a housing 11 and a neck 13. There are two housings 11, which are hinged to each other and locked by quick-release bolts 12; the neck 13 is composed of a plurality of semi-annular sleeves 14 arranged in concentric circles.

[0036] The housing 11 is a structural component used to enclose the outside of the shaft and provide support. It can be made of metal, such as aluminum alloy or stainless steel, to ensure sufficient strength and durability. The housing 11 is connected by a hinge and quickly locked using quick-release bolts 12, which facilitates quick opening and closing of the clamping part 1 by the operator. The neck 13 is an adjustable structure composed of multiple semi-annular sleeves 14. Its inner diameter can be changed by increasing or decreasing the number of sleeves 14, thereby accommodating the removal of bearings from shafts of different diameters.

[0037] In detail, the aforementioned clamping part 1 achieves a quick opening and closing function through the hinged design of the two housings 11. Simultaneously, the quick-release bolts 12 ensure the clamping part 1 remains stable during operation, preventing eccentric force problems caused by loosening. Multiple semi-annular sleeves 14 in the necked neck 13 form an adjustable inner diameter structure through splicing and concentric arrangement, allowing for flexible adjustment according to actual needs. This enables the clamping part 1 to adapt to shafts of different sizes and to fit tightly against bearings. The evenly distributed force application effectively eliminates eccentric force, protecting the shaft and bearing from damage.

[0038] This application further proposes that the housing 11 and the sleeve 14, as well as multiple sleeves 14, are connected by a locking block 15 and a locking groove 16.

[0039] The locking block 15 refers to a protruding structure used to achieve a mechanical connection. The main purpose of the locking block 15 is to provide stable connection support. The locking groove 16 refers to a groove structure that is adapted to the locking block 15. It can be achieved by opening a groove of a specific shape on the housing 11 or the sleeve 14. The purpose of the locking groove 16 is to provide the locking block 15 with precise positioning and a firm fitting space.

[0040] Specifically, the connection between the housing 11 and the sleeve 14 is achieved through the engagement of the locking block 15 and the slot 16, ensuring a stable mechanical connection and uniform force transmission when disassembly force is applied. The connection between multiple sleeves 14 also employs the engagement of the locking block 15 and the slot 16, allowing the entire neck to transmit disassembly force uniformly as a whole. This solves the problem of unstable connection and avoids eccentric forces caused by loose connections. Simultaneously, this connection method forms an organic fit with the overall structure of the clamping part 1, ensuring uniform force distribution during disassembly, thereby effectively protecting the shaft and bearing from damage or deformation. Through the above technical solutions, uniform distribution of disassembly force is achieved, significantly reducing the risk of component damage.

[0041] This application further proposes that the connecting rod 3 is hinged to both sides of the clamping part 1, and the end of the connecting plate 4 is provided with an opening groove 2 for use with the connecting rod 3. After the connecting rod 3 is placed inside the opening groove 2, the connecting rod 3 and the connecting plate 4 are fixed together by a nut.

[0042] The design of the connecting rod 3 being hinged to both sides of the clamping part 1 means that the connecting rod 3 and the clamping part 1 are rotatably connected through a hinge structure. This can be achieved using a pin connection or a ball joint structure. The purpose is to allow the connecting rod 3 to flexibly adjust its angle according to actual disassembly requirements and adapt to angle changes under different working conditions. The opening slot 2 refers to a groove-shaped structure with a certain width and depth provided at the end of the connecting plate 4. It can be a U-shaped slot or a V-shaped slot, and its purpose is to provide a fixed space for the connecting rod 3.

[0043] Specifically, the hinged design of the connecting rod 3 allows it to adaptively adjust itself during disassembly based on changes in the angle of the clamping part 1 or the shaft, ensuring that the applied disassembly force is always evenly distributed axially. The opening slot 2 at the end of the connecting plate 4 engages with the connecting rod 3, providing additional adjustment freedom and avoiding stress concentration caused by rigid fixing. This not only solves the problem of uneven force application but also significantly improves tool centering and adaptability, effectively protecting the shaft and bearings from damage. Furthermore, the opening direction of the opening slot 2 matches the rotation direction of the connecting rod 3, facilitating the insertion of the connecting rod 3 into the opening slot 2.

[0044] This application further proposes that the actuating part 5 includes a screw 51, which is threadedly connected to the inside of the connecting plate 4.

[0045] The screw 51 is fixed inside the connecting plate 4 by a threaded connection. This design allows for precise control of the pushing distance and force by rotating the screw 51, thereby providing a stable linear force. The stable force eliminates the risk of eccentric force in traditional methods, ensuring the stability and controllability of the disassembly operation.

[0046] Specifically, the threaded connection between the screw 51 and the connecting plate 4 makes the force application process more precise and controllable. By rotating the screw 51, its position relative to the connecting plate 4 can be gradually adjusted, thereby achieving uniform force application to the end of the shaft and effectively avoiding uneven force application, ensuring that the disassembly force is always evenly distributed along the axial direction. In addition, the position of the screw 51 is firmly fixed inside the connecting plate 4, preventing possible slippage or displacement during the force application process, thus protecting the bearings and shaft from damage.

[0047] This application further proposes that the pusher 5 also includes a pad 52, which is rotatably connected to the end of the screw 51, and the area of ​​the pad that fits against the shaft side is larger than the cross-sectional area of ​​the screw 51.

[0048] The pad 52 is an intermediate component used to increase the contact area. It can be implemented by means of a metal disc, a rubber pad, or other structures with a large contact surface, so as to avoid the problem of local stress concentration caused by the small contact area when the end of the screw 51 directly contacts the shaft.

[0049] In detail, the pusher 5 achieves uniform force application through the cooperation of the pad 52 and the screw 51. The large-area contact design of the pad 52 can distribute the axial thrust transmitted by the screw 51 to a larger area, thereby effectively reducing the pressure per unit area. This solves the problem of uneven force application that may be caused by the direct contact of the screw 51 end with the shaft, and significantly reduces the risk of damage to the shaft surface.

[0050] This application further proposes that the pusher 5 also includes a force-bearing block 53, which is fixedly connected to the end of the screw 51 away from the shaft and is in the shape of a regular hexagon.

[0051] The force-bearing block 53 is a structural component used to transmit torque, which can be implemented using a regular hexagonal prism made of metal. The design of this regular hexagon allows for perfect matching with tools such as standard hex wrenches, and its purpose is to provide a stable force-bearing point, making it easy for the operator to contact and apply force using external tools.

[0052] In detail, by setting a force-receiving block 53 at the end of the screw 51 away from the shaft, the operational performance of the pushing unit 5 is optimized. The regular hexagonal design of the force-receiving block 53 not only facilitates matching with standard tools but also effectively avoids the generation of eccentric forces, thereby ensuring the stability of axial force transmission. At the same time, the position of the force-receiving block 53, located away from the working area, allows the operator to more conveniently use external tools, significantly improving disassembly efficiency.

[0053] This application further proposes that the minimum inner diameter of the clamping part 1 is greater than the outer diameter of the shaft, and the minimum inner diameter of the clamping part 1 is less than the maximum outer diameter of the bearing.

[0054] Clamping part 1 refers to the component used to clamp the bearing and fit around the outside of the shaft. It can be implemented using a ring structure with an appropriate inner diameter. In practical applications, the minimum inner diameter of clamping part 1 needs to be precisely designed based on the outer diameter of the shaft and the maximum outer diameter of the bearing to ensure that it avoids the surface of the shaft while tightly fitting the bearing. Its purpose is to avoid interference or friction between the tool and the shaft during operation through reasonable dimensional settings, while providing a stable clamping point for uniform transmission of axial force.

[0055] In detail, the clamping part 1 achieves its adaptation function to the shaft and bearing through its specific dimensional relationship. The minimum inner diameter of the clamping part 1 is larger than the outer diameter of the shaft. This design ensures that the tool will not come into contact with the surface of the shaft during the fitting process, thereby effectively protecting the shaft from damage. At the same time, the minimum inner diameter of the clamping part 1 is smaller than the maximum outer diameter of the bearing, which allows the clamping part 1 to be firmly engaged with the bearing, forming a stable connection point.

[0056] The steps for using this application are as follows:

[0057] First, fit the clamping part 1 onto the outside of the shaft body, ensuring the bearing end face fits against the internal neck 13. Next, place the connecting plate 4 at the end of the shaft body, ensuring the pad 52 at the front end of the screw 51 is firmly against the shaft end. Then, secure the connecting rod 3 to the connecting plate 4 with a nut. For disassembly, use a tool to unscrew the force-bearing block 53 at the tail of the screw 51, driving the screw 51 forward, allowing the bearing to move smoothly out along the shaft body, completing the disassembly.

[0058] The terms “first”, “second”, etc., are used to distinguish similar objects, not to describe or indicate a specific order or sequence.

[0059] The term "comprising" or any other similar term is intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus / device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent in such process, method, article, or apparatus / device.

[0060] The technical solution of this utility model has been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the protection scope of this utility model is obviously not limited to these specific embodiments. Without departing from the principle of this utility model, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the protection scope of this utility model.

Claims

1. A tool for disassembling shaft bearings, used for disassembling bearings external to a shaft, characterized in that, include: The clamping part (1) is sleeved on the outside of the shaft body and can be clamped to the bearing inside; Connecting rods (3) are provided on both sides of the clamping part (1); A connecting plate (4) is connected to a connecting rod (3) and is located at one end of the shaft; and The pusher (5) is located in the middle of the connecting rod (3), with one end abutting against the end of the shaft.

2. The tool for disassembling shaft bearings according to claim 1, characterized in that, The clamping part (1) includes: The housing (11) is provided in two parts, the two housings (11) are hinged together and locked by quick-release bolts (12); and The neck (13) is composed of multiple concentric semi-circular sleeves (14).

3. The tool for disassembling shaft bearings according to claim 2, characterized in that, The housing (11) and the sleeve (14), as well as the multiple sleeves (14), are connected by a locking block (15) and a locking groove (16).

4. The tool for disassembling shaft bearings according to claim 1, characterized in that, The connecting rod (3) is hinged to both sides of the clamping part (1), and the end of the connecting plate (4) is provided with an opening groove (2) for use with the connecting rod (3).

5. The tool for disassembling shaft bearings according to claim 1, characterized in that, The propulsion unit (5) includes: The screw (51) is threaded into the inside of the connecting plate (4).

6. The tool for disassembling shaft bearings according to claim 5, characterized in that, The propulsion unit (5) also includes: The pad (52) is rotatably connected to the end of the screw (51), and the area of ​​the pad that fits against the side of the shaft is larger than the cross-sectional area of ​​the screw (51).

7. The tool for disassembling shaft bearings according to claim 5, characterized in that, The propulsion unit (5) also includes: The force-bearing block (53) is fixedly connected to the end of the screw (51) away from the shaft and is in the shape of a regular hexagon.

8. The tool for disassembling shaft bearings according to claim 1, characterized in that, The minimum inner diameter of the clamping part (1) is greater than the outer diameter of the shaft, and the minimum inner diameter of the clamping part (1) is less than the maximum outer diameter of the bearing.

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