A bearing dismounting device

Abstract

The application relates to a bearing dismounting device, which is provided with a hollow pipe structure through a sleeve, a screw rod penetrating the middle of the sleeve, rotary connection between the sleeve and the screw rod, and the screw rod extending along the central axis of the sleeve; the screw rod is provided with a hollow groove at the end, a screw matched with the hollow groove is installed in the hollow groove, the screw is threadedly rotated and extended and retracted at the end of the screw rod; an expansion assembly is connected between the screw rod and the screw, the expansion assembly is provided with an expansion claw at the end, and the expansion claw is driven to open and close by the screw rod extension and retraction of the screw. When dismounting, the expansion claw extends into the inside of the inner ring of the bearing, and is clamped to the end face of the inner ring after being opened, thereby providing a fixed force point for the subsequent axial ejection of the bearing. By pulling the screw rod, the expansion claw and the bearing are pulled out, and the dismounting of the bearing is effectively realized. The clamping positions of the expansion claws are symmetrical, the pulling force for dismounting the bearing is symmetrical, and the damage to the bearing is reduced.

Description

Technical Field

[0001] This invention relates to the field of mechanical disassembly and assembly technology, and in particular to a bearing disassembly device. Background Technology

[0002] Currently, many mechanical devices use bearings to reduce friction. When these devices break down, the entire machine may need to be disassembled, requiring the bearings to be removed. Existing bearing removal methods involve first removing the shaft connected to the bearing's inner ring, then using a disassembly bushing or a soft metal plate as a punch. This punch is placed flat on the entire end face of the bearing, and then a copper rod and hammer are used to strike the punch evenly and alternately at symmetrical positions around the circumference, knocking the bearing out.

[0003] However, this disassembly method can easily damage the inner ring of the bearing or the entire bearing if the tapping is uneven or the force is too great, affecting the subsequent use of the bearing.

[0004] The above problems urgently need to be addressed. Summary of the Invention

[0005] This invention discloses a bearing disassembly device, which aims to solve the technical problems existing in the prior art.

[0006] The present invention adopts the following technical solution, comprising: a sleeve, having a hollow circular tube structure, with a screw passing through the middle of the sleeve, the sleeve and the screw being rotatably connected, the screw extending and retracting along the central axis of the sleeve; the screw having a hollow groove at its end, with a threaded screw installed in the hollow groove, the screw rotating and extending at the end of the screw; and an expansion assembly connected between the screw and the screw, with an expansion claw installed at its end, the expansion assembly being used by the screw extending and retracting along the screw to open and close the expansion claw.

[0007] Optionally, the expansion assembly includes a connecting rod and a sliding plate; the sliding plate is threadedly connected to the screw, the connecting rod is mounted on the end of the screw, the side of the connecting rod away from the screw is connected to the sliding plate, and the expansion claw is mounted on the sliding plate and pivotally connected to the connecting rod via a column.

[0008] Optionally, the expansion claw includes two claws, each claw body is C-shaped and the opening of the bend faces opposite directions.

[0009] Optionally, it also includes: a sealing nut, disposed on the screw and threadedly connected to the screw; a sealing ring is provided at one end of the sealing nut near the sleeve, and the sealing ring is fitted with the inner ring of the sleeve.

[0010] Optionally, a fixing nut is provided at the end of the screw away from the sealing nut, and the fixing nut is fixed to the end of the screw to limit the movement distance of the sealing nut.

[0011] Optionally, a horizontal plate is provided on the outer side of the sleeve, the horizontal plate being arranged along the diameter direction of the sleeve and parallel to the opening and closing direction of the expansion claw.

[0012] Optionally, a needle roller bearing is provided between the sleeve and the screw.

[0013] Optionally, the end of the expanding claw is provided with a detachable anti-slip claw head, and the surface of the anti-slip claw head is provided with an anti-slip texture.

[0014] Optionally, the sleeve has an opening near the end of the expansion claw, and the opening is located at the horizontal position where the expansion claw is open and closed.

[0015] Optionally, the sleeve has a scale marking on its side and at the opening position to indicate the opening degree of the expansion claw, and the scale marking corresponds to the bearing inner diameter specification.

[0016] The technical solution adopted in this invention can achieve at least one of the following beneficial effects: In this embodiment of the invention, a hollow circular tube structure is used as a sleeve, with a screw passing through the middle of the sleeve. The sleeve and the screw are rotatably connected, and the screw extends and retracts along the central axis of the sleeve. A hollow groove is provided at the end of the screw, and a threaded screw is installed in the groove. The screw rotates and retracts at the end of the screw. An expansion assembly is connected between the screw and the screw, and an expansion claw is installed at the end of the expansion assembly. The expansion assembly is used by the screw to extend and retract along the screw, causing the expansion claw to open and close. During disassembly, the expansion claw extends into the inner ring of the bearing, and after opening, it clamps the end face of the inner ring, providing a fixed force point for subsequent axial ejection of the bearing. By pulling the screw, the expansion claw pulls the entire bearing out, effectively achieving bearing disassembly. The symmetrical engagement position of the expansion claw ensures that the dragging force during bearing disassembly is symmetrical, reducing bearing damage. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below, forming part of the present invention. The illustrative embodiments of the present invention and their descriptions explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings: Figure 1 This is a front view of a bearing disassembly device according to the present invention; Figure 2 This is a front view of the bearing disassembly device of the present invention after the sleeve has been removed; Figure 3This is a side view of a bearing disassembly device according to the present invention.

[0018] Explanation of reference numerals in the attached figures: 1. Sleeve; 11. Opening; 12. Scale markings; 2. Screw; 3. Screw; 4. Expansion assembly; 41. Connecting rod; 42. Sliding plate; 5. Expansion claw; 51. Anti-slip claw head; 6. Sealing nut; 61. Sealing ring; 7. Fixing nut; 8. Horizontal plate; 9. Needle roller bearing. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. In the description of this invention, it should be noted that the term "or" is generally used to include the meaning of "and / or," unless otherwise expressly indicated.

[0020] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or a magnetic connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. Furthermore, in the description of this application, the terms "first," "second," etc., are used only for distinguishing descriptions and should not be construed as indicating or implying relative importance. In the description of this invention, "a plurality of" means at least two, such as two, three, or more, unless otherwise explicitly specified.

[0021] Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0022] To address the problems existing in related technologies, this application provides a bearing disassembly device.

[0023] This embodiment provides a bearing disassembly device, such as... Figure 1 As shown, Figure 1 This is a front view of a bearing disassembly device according to the present invention, the device comprising: The sleeve 1 has a hollow circular tube structure, with a screw 2 passing through the middle of the sleeve 1. The sleeve 1 and the screw 2 are rotatably connected, and the screw 2 extends and retracts along the central axis of the sleeve 1. The screw 2 has a hollow groove at its end, and a threaded screw 3 is installed in the hollow groove. The screw 3 rotates and extends and retracts along the threaded end of the screw 2. The expansion component 4 is connected between the screw 2 and the screw 3. An expansion claw 5 is installed at the end of the expansion component 4. The expansion component 4 is used to drive the expansion claw 5 to open and close as the screw 3 extends and retracts along the screw 2.

[0024] Optionally, the sleeve 1 serves as the fixed support base of the device. The hollowed-out round tube can significantly reduce the overall weight, while reserving room for the extension, retraction, and rotation of the internal screw 2, preventing jamming during rotation. The inner wall of the sleeve 1 is smoothed to form a gap-rotatable connection with the screw 2. This not only restricts the radial wobble of the screw 2 and ensures coaxiality, but also allows the screw 2 to rotate freely and extend and retract along the central axis, ensuring overall transmission stability.

[0025] Optionally, the screw 2 is a transmission ejection component with a segmented functional design. The main body passes through the sleeve 1 to achieve axial feeding. The threaded hollow groove at the end provides an installation reference for the screw 3. The screw 3 can be precisely adjusted for extension and retraction through the threaded engagement. The expansion range of the expansion claw 5 can be adjusted by the degree of extension and retraction of the screw 3 to adapt to different specifications of bearings.

[0026] Optionally, the expansion assembly 4 and the expansion claw 5 form an internal clamping mechanism for the bearing. Relying on the threaded extension and retraction power of the screw 3, the linear extension and retraction motion is converted into the radial opening and closing motion of the expansion claw 5. During disassembly, the expansion claw 5 extends into the inner side of the bearing inner ring, and after opening, clamps the end face of the bearing inner ring, providing a fixed force point for the subsequent axial ejection of the bearing. By pulling the screw 2, the expansion claw 5 drives the entire bearing to be pulled out, effectively realizing the disassembly of the bearing.

[0027] In some preferred embodiments, the expansion assembly 4 includes a connecting rod 41 and a sliding plate 42; the sliding plate 42 is threadedly connected to the screw 3, the connecting rod 41 is mounted on the end of the screw 2, and the side of the connecting rod 41 away from the screw 2 is connected to the sliding plate 42; the expansion claw 5 is mounted on the sliding plate 42 and is pivotally connected to the connecting rod 41 via a column. Figure 2 As shown, Figure 2 This is a front view of the bearing disassembly device of the present invention after removing the sleeve 1.

[0028] Optionally, the expansion assembly 4 includes a connecting rod 41 and a sliding plate 42, which work together with the expansion claw 5 to form a linkage mechanism. The connecting rod 41 is fixed to the end of the screw 2 as a fixed support arm; the sliding plate 42 is threadedly fixed to the end screw 3 and can move linearly with the extension and retraction of the screw 3; the expansion claw 5 is hinged to the connecting rod 41 and the sliding plate 42 respectively through a pivot column to form a lever-type opening and closing structure.

[0029] Optionally, when the screw 3 at the end of the rotating screw 2 is rotated, the screw 3 causes the sliding plate 42 to move linearly along the axial direction of the screw 2. Since the connecting rod 41 is fixed in position, the displacement of the sliding plate 42 will pull or push the pivotally connected expansion claw 5, causing it to rotate and swing around the pivot column, ultimately achieving precise opening and closing of the expansion claw 5. This hinged lever structure provides stable transmission and uniform opening and closing force, avoiding bearing jamming and deformation caused by unilateral force.

[0030] Optionally, the pivot column is made of wear-resistant hard material, which is not easily worn or loosened by repeated opening and closing over a long period of time; the sliding plate 42 and the connecting rod 41 are arranged in parallel to ensure the bidirectional opening and closing synchronization of the expansion claw 5, ensuring uniform force when clamping the bearing, realizing non-destructive disassembly, and protecting the bearing and equipment mounting base.

[0031] In some preferred embodiments, the expansion claw 5 comprises two claws, the two claw bodies are C-shaped and the openings 11 of the bends face opposite directions.

[0032] Optionally, the expansion claw 5 has a bending arc that matches the annular end face of the bearing inner ring, with a large contact area, which can avoid bearing inner ring indentation and deformation caused by point clamping, and is suitable for the disassembly requirements of precision bearings.

[0033] Optionally, the double claws open to form symmetrical force support points, and the two points are aligned and clamped to the inner ring of the bearing, which greatly improves stability. There is no displacement or slippage during disassembly, effectively preventing the bearing from being stuck due to force on one side.

[0034] In some preferred embodiments, it further includes: a sealing nut 6, which is disposed on the screw 2 and threadedly connected to the screw 2; a sealing ring 61 is provided at one end of the sealing nut 6 near the sleeve 1, and the sealing ring 61 is fitted with the inner ring of the sleeve 1.

[0035] Optionally, during disassembly, the sealing nut 6 is rotated so that the sealing ring 61 on the sealing nut 6 is embedded in the inner ring of the sleeve 1 and fits against the end face of the sleeve 1. With the sleeve 1 as a fixed support point, the axial thrust is generated by rotating the sealing nut 6, which drives the screw 2 to extend and retract outward as a whole, causing the expansion claw 5 to clamp the bearing and push out synchronously, converting the rotational torque into a linear push-out force.

[0036] Optionally, the sealing ring 61 can be precisely fitted with the sleeve 1 to further lock the coaxiality of the screw 2 and the sleeve 1, prevent radial displacement of the screw 2 during the ejection process, and ensure smooth disassembly under force.

[0037] In some preferred embodiments, a fixing nut 7 is provided at the end of the screw 2 away from the sealing nut 6. The fixing nut 7 is fixed to the end of the screw 2 and restricts the movement distance of the sealing nut 6.

[0038] Optionally, the fixing nut 7 is installed at the farthest end of the screw 2, which is far from the sealing nut 6 and also further away from the expansion claw 5, serving as the end-fixing structure for the tail of the screw 2. The sealing nut 6 is fitted onto the middle section of the screw 2 near the expansion claw 5 and can be adjusted by rotating back and forth along the thread of the screw 2. The fixing nut 7 at the farthest end of the screw 2 is an end-limiting structure that can limit the maximum backward travel of the sealing nut 6, preventing the sealing nut 6 from sliding excessively towards the tail of the screw 2 and coming off the end of the screw 2, effectively preventing the overall threaded transmission structure from loosening and disintegrating. At the same time, this end-limiting structure can precisely control the overall extension and retraction stroke of the screw 2, preventing the screw 2 from overtravel during operation and avoiding problems such as overload of the expansion component 4 and bearing crush damage.

[0039] In some preferred embodiments, a horizontal plate 8 is provided on the outside of the sleeve 1. The horizontal plate 8 is arranged along the diameter direction of the sleeve 1 and is parallel to the opening and closing direction of the expansion claw 5.

[0040] Optionally, a horizontal plate 8 is fixedly installed on the outside of the sleeve 1. The horizontal plate 8 is arranged through the sleeve 1 along the diameter direction, and the plate surface is parallel to the opening and closing direction of the expansion claw 5.

[0041] Optionally, during operation, the horizontal plate 8 can be fixed by hand or with a clamp to restrict the overall rotation of the sleeve 1, ensuring that the sleeve 1 always remains fixed, so that the rotational power of the screw 2 and nut is converted into axial pushing force, avoiding transmission failure and disassembly jamming caused by the rotation of the sleeve 1.

[0042] In addition, the horizontal plate 8 and the expansion claw 5 are parallel in opening and closing direction, which can be used as a visual reference. During operation, the opening direction of the expansion claw 5 can be quickly determined by the horizontal plate 8, accurately aligning the inner ring of the bearing and improving assembly and disassembly efficiency.

[0043] In some preferred embodiments, a needle roller bearing 9 is provided between the sleeve 1 and the screw 2.

[0044] Optionally, the sleeve 1 and screw 2 have a standard metal clearance fit, which results in high rotational friction resistance, easy wear, and rotational jamming. By installing a needle roller bearing 9 within the clearance between the sleeve 1 and screw 2, the sliding friction between the screw 2 and sleeve 1 is upgraded to rolling friction. The needle roller bearing 9 features a small radial dimension and high load-bearing capacity, making it suitable for the narrow assembly space of the hollow sleeve 1 without increasing the overall size of the device.

[0045] During operation, the resistance to rotation and axial extension of screw 2 is significantly reduced, resulting in smoother, more seamless rotation and a substantial reduction in manual operation effort. Simultaneously, it precisely constrains the radial runout of screw 2, further improving the coaxiality between screw 2 and sleeve 1. This ensures more even force distribution during the clamping of expansion claw 5 and bearing ejection, preventing eccentric ejection that could damage the bearing and equipment base. Furthermore, rolling friction significantly reduces wear on metal mating surfaces, effectively extending the device's service life and making it suitable for high-frequency, high-intensity maintenance operations.

[0046] In some preferred embodiments, the end of the expanding claw 5 is provided with a detachable anti-slip claw head 51, and the surface of the anti-slip claw head 51 is provided with an anti-slip texture.

[0047] Optionally, the anti-slip claw head 51 is detachably fixed to the end of the expansion claw 5 via threaded locking, snap-lock positioning, or other detachable methods. This allows for easy disassembly and replacement, eliminating the need to replace the entire expansion claw 5 assembly and significantly reducing equipment maintenance costs. The surface of the anti-slip claw head 51 is covered with fine anti-slip textures, annular anti-slip teeth, or dotted anti-slip protrusions, which greatly enhances the friction between the claw body and the inner wall of the bearing inner ring, effectively solving the problems of slippage and misalignment caused by oil stains and corrosion during disassembly. Simultaneously, the detachable structure adapts to different scenarios, allowing for the replacement of anti-slip, wear-resistant, and soft-protective claw heads. For thin-walled precision bearings, a soft anti-slip claw head 51 can be used to avoid rigid compression damaging the bearing inner ring, truly achieving non-destructive disassembly and improving the device's versatility and operational safety.

[0048] In some preferred embodiments, the sleeve 1 has an opening 11 near the end of the expansion claw 5, and the opening 11 is located at the horizontal position where the expansion claw 5 is open and closed. For example... Figure 3 As shown, Figure 3 This is a side view of a bearing disassembly device according to the present invention.

[0049] Optionally, the opening 11 precisely corresponds to the horizontal plane of the opening and closing motion of the expansion claw 5, effectively avoiding interference from the tube wall of the sleeve 1 on the movement of the expansion claw 5. The end of the sleeve 1 is prone to problems such as the claw hitting or pressing against the inner wall of the sleeve 1 when it opens, leading to limited opening stroke, insufficient opening, and structural deformation. Through the precisely aligned lateral opening 11, the radial opening and closing space of the expansion claw 5 can be completely released, ensuring the maximum opening stroke of the claw and smooth, uninterrupted opening and closing. At the same time, the opening 11 forms a visual observation window, allowing operators to observe the opening status of the claw and its contact with the bearing inner ring in real time, adjusting the opening in a timely manner to avoid over-opening and damaging the bearing, thus improving the accuracy and stability of the disassembly operation.

[0050] In some preferred embodiments, a scale mark 12 for indicating the opening degree of the expansion claw 5 is provided on the side of the sleeve 1 and at the opening 11 position. The scale mark 12 corresponds to the bearing inner diameter specification.

[0051] Optionally, the scale markings 12 are positioned at the opening 11 on the side of the sleeve 1, precisely corresponding to the opening and closing stroke of the expansion claw 5. The scale values ​​directly correspond to the standard bearing inner diameter, eliminating the need for manual conversion. During operation, the operator can directly adjust the feed amount of the end screw 3 according to the specifications of the bearing to be disassembled, precisely controlling the opening range of the expansion claw 5. This effectively prevents slippage due to insufficient opening or cracking of the bearing due to excessive opening. Simultaneously, the scale is integrated into the opening 11 of the sleeve 1, synchronously corresponding to the movement position of the claw body. This provides intuitive observation and precise alignment, achieving standardized and quantifiable bearing disassembly, significantly reducing the operational threshold and improving maintenance efficiency and yield.

[0052] The above are merely preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A bearing disassembly device, characterized in that, include: The sleeve (1) has a hollowed-out circular tube structure, and a screw (2) is provided to pass through the middle of the sleeve (1). The sleeve (1) and the screw (2) are rotatably connected. The screw (2) extends and retracts along the central axis of the sleeve (1). The screw (2) has a hollow groove at its end, and a screw (3) with matching threads is installed in the hollow groove. The screw (3) rotates and extends and retracts at the end of the screw (2). An expansion assembly (4) is connected between the screw (2) and the screw (3). An expansion claw (5) is installed at the end of the expansion assembly (4). The expansion assembly (4) is used to cause the expansion claw (5) to open and close when the screw (3) extends and retracts along the screw (2).

2. The bearing disassembly device according to claim 1, characterized in that, The expansion assembly (4) includes a connecting rod (41) and a sliding piece (42). The sliding plate (42) is threadedly connected to the screw (3), the connecting rod (41) is installed at the end of the screw (2), the side of the connecting rod (41) away from the screw (2) is connected to the sliding plate (42), and the expansion claw (5) is installed on the sliding plate (42) and is pivotally connected to the connecting rod (41) through a column.

3. The bearing disassembly device according to claim 1, characterized in that, The expansion claw (5) comprises two claws, each claw body is C-shaped and the opening (11) of the bend faces the opposite direction.

4. The bearing disassembly device according to claim 1, characterized in that, Also includes: A sealing nut (6) is provided on the screw (2) and threadedly connected to the screw (2); A sealing ring (61) is provided at one end of the sealing nut (6) near the sleeve (1), and the sealing ring (61) is fitted with the inner ring of the sleeve (1).

5. A bearing disassembly device according to claim 4, characterized in that, A fixing nut (7) is provided at one end of the screw (2) away from the sealing nut (6). The fixing nut (7) is fixed to the end of the screw (2) to limit the movement distance of the sealing nut (6).

6. A bearing disassembly device according to claim 1, characterized in that, A horizontal plate (8) is provided on the outside of the sleeve (1). The horizontal plate (8) is arranged along the diameter direction of the sleeve (1) and is parallel to the opening and closing direction of the expansion claw (5).

7. A bearing disassembly device according to claim 1, characterized in that, A needle roller bearing (9) is provided between the sleeve (1) and the screw (2).

8. A bearing disassembly device according to claim 1, characterized in that, The end of the expanding claw (5) is provided with a detachable anti-slip claw head (51), and the surface of the anti-slip claw head (51) is provided with an anti-slip texture.

9. A bearing disassembly device according to claim 1, characterized in that, The sleeve (1) has an opening (11) near the end of the expansion claw (5), and the opening (11) is located at the horizontal position of the opening and closing of the expansion claw (5).

10. A bearing disassembly device according to claim 9, characterized in that, The sleeve (1) has a scale mark (12) on its side and at the opening (11) position for marking the opening degree of the expansion claw (5), and the scale mark (12) corresponds to the bearing inner diameter specification.

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