Blind hole inner bearing outer ring dismounting device

Abstract

The utility model provides a device for disassembling a bearing outer ring in a blind hole, relates to a device for disassembling the bearing outer ring, and solves the technical problems that the bearing outer ring in the blind hole is easy to slip, the edge of the bearing outer ring to be disassembled is damaged and the device is not suitable for an installation environment with a deeper blind hole or a smaller hole diameter when the bearing outer ring in the blind hole is disassembled by adopting a drawing method of a drawing device in the prior art. The device comprises a pulling and dismounting rod, a clamping unit and a pulling hammer, one end of the pulling and dismounting rod is a handle, and the other end is connected with the clamping unit; a stop block is arranged on the pulling and dismounting rod on the inner side of the handle; the pulling hammer is arranged on the pulling and disassembling rod in a sleeving mode and can slide between the check block and the clamping unit. The clamping unit is used for clamping a bearing outer ring to be disassembled and comprises a pin disc and a lifting pin; at least three threaded holes are formed in the periphery of the pin disc, and each threaded hole is provided with a lifting pin. The outer diameter of the pin disc is smaller than the inner diameter of the to-be-disassembled bearing outer ring.

Description

Technical Field

[0001] This utility model relates to a bearing outer ring disassembly device, specifically a blind bore bearing outer ring disassembly device. Background Technology

[0002] In the maintenance of mechanical equipment, it is often necessary to disassemble bearing outer rings that are scattered in blind holes. Due to limitations imposed by the working environment, conditions, and bearing location, existing technology typically involves using a puller to remove these outer rings. This involves first securing the outer ring with pullers, supporting the shaft or bore opening with a support arm, and then rotating the center screw to gradually apply pulling force, thus slowly pulling out the outer ring. However, this method requires the pullers to penetrate deep into the blind hole and hook onto the edge of the outer ring. Therefore, this method is prone to slippage and can even damage the edge of the outer ring. Furthermore, when the blind hole is deep or small in diameter, conventional pullers cannot effectively hook onto the edge of the outer ring, making it impossible to apply force.

[0003] Utility model patent CN214394040U discloses a bearing disassembly fixture, which disassembles the bearing by first passing a scalable and adjustable connector through the bearing's inner bore and then expanding the connector to hold the bearing in place. However, this fixture requires the disassembly device to pass through the bearing's inner bore and can only disassemble the entire bearing; it cannot disassemble the outer ring of the bearing that has been separated and scattered in the blind hole. Utility Model Content

[0004] The purpose of this invention is to solve the technical problems of existing technologies that use pullers to remove the outer ring of a blind bore bearing, which are prone to slippage, damage to the edge of the outer ring of the bearing to be removed, and are not suitable for installation environments with deep blind holes or small diameters. Therefore, this invention provides a device for removing the outer ring of a blind bore bearing.

[0005] To achieve the above objectives, the technical solution provided by this utility model is as follows:

[0006] A device for removing the outer ring of a blind bore bearing is characterized by including a pull rod, a clamping unit, and a pull hammer.

[0007] One end of the pull rod is a handle, and the other end is connected to the clamping unit; a stop is provided on the pull rod inside the handle;

[0008] The puller is sleeved on the pull rod, and the puller can slide between the stop block and the clamping unit;

[0009] The clamping unit is used to clamp the outer ring of the bearing to be disassembled, and includes a pin plate and a top pin;

[0010] The outer circumference of the pin disc is provided with at least three threaded holes, and each threaded hole is fitted with a top pin; the outer diameter of the pin disc is smaller than the inner diameter of the outer ring of the bearing to be disassembled.

[0011] Furthermore, in order to ensure uniform torque during the disassembly of the outer ring of the bearing to be disassembled, at least three top pins are evenly distributed on the outer periphery of the pin disc, and each top pin includes a head, a connecting section, an operating section and an installation section connected in sequence.

[0012] The front end of the head is a spherical body, used to press against the outer ring of the bearing to be disassembled;

[0013] The connecting segment is a columnar body, with one end connected to the head and the other end connected to the operating segment;

[0014] The outer wall of the operating section is provided with at least two corresponding clamping surfaces for installing tool clamps and installing top pins.

[0015] The outer wall of the mounting section is provided with external threads.

[0016] Furthermore, the clamping unit also includes a connecting rod, one end of which is connected to the pin disc, and the other end is provided with an external thread, which is connected to the threaded hole provided at the other end of the pull-out rod.

[0017] Furthermore, for ease of gripping, the hammer is a cylindrical body with a through hole along the axial direction for fitting the hammer onto the pull rod; the end of the hammer near the clamping unit has a rounded transition, the end near the stop is flat, its outer diameter is larger than the outer diameter of the end near the clamping unit, and the middle of the outer periphery of the hammer is a concave curved surface.

[0018] Furthermore, in order to reduce the impact surface and noise, the stop block is set as a frustum near the hammer, with the outer diameter of the frustum being larger than the diameter of the axial through hole in the hammer. The end near the handle is a cone, with the small end of the cone connected to the frustum, and the two have the same outer diameter.

[0019] Furthermore, the outer periphery of the pin disc is evenly provided with three threaded holes.

[0020] Furthermore, to prevent slippage during use, the handle is provided with knurling.

[0021] Furthermore, the handle, pin disc, top pin, and connecting rod are all made of medium carbon steel.

[0022] The hammer is made of high-carbon chromium bearing steel.

[0023] The beneficial effects of this utility model are:

[0024] 1. This utility model has a simple structure, low manufacturing cost, and is easy to disassemble and replace, with a long service life.

[0025] 2. This utility model can replace the pin plate or top pin of different specifications according to the size of the outer ring of the bearing to be disassembled and the actual disassembly situation, effectively expanding the scope of application and improving the versatility of the device.

[0026] 3. This utility model achieves stable clamping and fixing by clamping the heads of multiple top pins to the outer ring of the bearing to be disassembled, effectively preventing slippage or displacement, thereby reducing the risk of damage to the outer ring of the bearing to be disassembled, and providing a basis for solving problems in similar working conditions.

[0027] 4. This utility model achieves repeated pulling of the outer ring of the bearing to be disassembled by sliding the puller between the stop block and the clamping unit. It is easy to operate, has high disassembly efficiency, low noise, saves time and effort, and is safe and durable. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the structure of the blind hole inner bearing outer ring disassembly device embodiment of this utility model when removing the outer ring of the bearing to be disassembled;

[0029] Figure 2 yes Figure 1 Sectional view along axis AA;

[0030] Figure 3 This is a schematic diagram of the structure of the pull-out rod in an embodiment of this utility model;

[0031] Figure 4 This is a three-dimensional structural diagram of the hammer in an embodiment of this utility model;

[0032] Figure 5 This is a schematic diagram of the pin disc and connecting rod in an embodiment of this utility model;

[0033] Figure 6 This is a three-dimensional structural diagram of the top pin in an embodiment of this utility model;

[0034] Figure 7 This is a three-dimensional structural diagram of the outer ring of the bearing to be disassembled in an embodiment of this utility model;

[0035] Figure 8 This is a side view of the outer ring of the bearing to be disassembled in an embodiment of this utility model.

[0036] Icon labels:

[0037] 1-Pull-out rod, 2-Clamping unit, 3-Pull hammer, 4-Outer ring of bearing to be removed, 11-Handle, 12-Stop block, 21-Pin disc, 21-1-Threaded hole, 22-Top pin, 22-1-Head, 22-2-Connecting section, 22-3-Operating section, 22-4-Mounting section, 23-Connecting rod. Detailed Implementation

[0038] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0039] A device for disassembling the outer ring of a blind bore bearing, such as Figures 1 to 8 As shown, it includes a pull rod 1, a clamping unit 2, and a pull hammer 3; as Figures 1 to 3 As shown, one end of the pull rod 1 is a handle 11, which is knurled to increase friction and prevent slippage during use; the handle 11 is made of medium carbon steel; the other end of the pull rod 1 is provided with a threaded hole, which is connected to the clamping unit 2; a stop block 12 is provided on the pull rod 1 inside the handle 11; the pull rod 1 is a single piece; the pull hammer 3 is sleeved on the pull rod 1, and the pull hammer 3 can slide between the stop block 12 and the clamping unit 2; the hardness of the pull hammer 3 is greater than that of the pull rod 1 and the clamping unit 2, the pull hammer 3 is made of high carbon chromium bearing steel, and the pull rod 1 is made of medium carbon steel; the clamping unit 2 is used to clamp the outer ring 4 of the bearing to be removed, including a pin 21 and a top pin 22; the stop block 12 is set as a frustum near the pull hammer 3, which can effectively reduce the striking surface and reduce noise to a certain extent; the outer diameter of the frustum is larger than the diameter of the axial through hole in the pull hammer 3, and the end near the handle 11 is a truncated cone, the small end of which is connected to the frustum, and the outer diameters of the two are the same.

[0040] like Figure 4 As shown, the hammer 3 is a cylindrical body with a through hole along the axial direction for mounting the hammer 3 on the pull rod 1. The end of the hammer 3 near the clamping unit 2 has a rounded transition, while the end near the stop block 12 is flat. Its outer diameter is larger than the outer diameter of the end near the clamping unit 2. The outer periphery of the hammer 3 is concave and curved, which can provide a better grip and comfort.

[0041] like Figure 5 and Figure 6As shown, the outer circumference of the pin disc 21 is provided with at least three threaded holes 21-1, and each threaded hole 21-1 is fitted with a top pin 22; the outer diameter of the pin disc 21 is smaller than the inner diameter of the outer ring 4 of the bearing to be disassembled; the pin disc 21 is made of medium carbon steel; in order to ensure uniform torque during the disassembly of the outer ring of the bearing to be disassembled, at least three top pins 22 are evenly distributed on the outer circumference of the pin disc 21, and each top pin 22 includes a head 22-1, a connecting section 22-2, an operating section 22-3, and an installation section 22-4 connected in sequence; the front end of the head 22-1 is a spherical body, used to press against the bearing to be disassembled. Outer ring 4; connecting section 22-2 is a columnar body, one end of which is connected to head 22-1 and the other end is connected to operating section 22-3; the outer wall of operating section 22-3 is provided with at least two corresponding clamping surfaces for installing tools and installing top pin 22; the outer wall of mounting section 22-4 is provided with external threads; top pin 22 is made of medium carbon steel; clamping unit 2 also includes connecting rod 23, one end of connecting rod 23 is connected to pin disc 21, and the other end is provided with external threads, which are connected to the threaded hole provided at the other end of pull-out rod 1; connecting rod 23 is made of medium carbon steel.

[0042] like Figure 7 and Figure 8 As shown, during the disassembly of the outer ring of the bearing to be disassembled, the position of the top pin 22 is adjusted so that the head 22-1 of the top pin presses against the inner ring groove of the outer ring 4 of the bearing to be disassembled.

[0043] In this utility model, the hammer 3 is made of GCr15 material with a hardness of 58-63HRC; the pull rod 1 and the clamping unit 2 are made of 45 steel with a hardness of 40-45HRC; the outer circumference of the pin disc 21 is evenly provided with three threaded holes 21-1, and the included angle between the threaded holes is 120 degrees; there are three top pins 22; the diameter of the through hole of the hammer 3 differs from the outer diameter of the pull rod 1 by 1mm, so that the hammer 3 can slide freely.

[0044] The working principle of the blind bore inner bearing outer ring disassembly device in the above embodiment:

[0045] 1) Use a tool to insert at least three top pins 22 into the threaded holes on the outer periphery of the pin disc 21, thereby installing the clamping unit 2.

[0046] 2) Based on the inner diameter of the outer ring 4 of the bearing to be disassembled, roughly adjust the position of the top pins 22 so that the outer diameter formed by the front ends of the heads of at least three top pins 22 is smaller than the inner diameter of the outer ring 4 of the bearing to be disassembled.

[0047] 3) Install the clamping unit 2 into the outer ring 4 of the bearing to be disassembled, use a tool to clamp the clamping surface of the operating section 22-3 of the top pin 22, and rotate the top pin 22 evenly so that the front ends of the heads of at least three top pins 22 contact and press against the inner ring groove of the outer ring 4 of the bearing to be disassembled in sequence to achieve positioning and clamping.

[0048] 4) Mount the hammer 3 onto the pull rod 1, then align the threaded hole of the pull rod 1 with the external thread of the connecting rod 23, and rotate the pull rod 1 clockwise until it can no longer rotate, thus securing the two together.

[0049] 5) Hold the knurled part of the handle 11 firmly with your left hand and the pull hammer 3 firmly with your right hand, and let it slide up and down along the pull rod 1. Continuously strike the stop block 12. After repeated striking and pulling, the outer ring 4 of the bearing to be disassembled will be slowly lifted and finally pulled out, and the disassembly will be completed.

[0050] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any changes or substitutions within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A blind hole inner bearing outer ring dismounting device, characterized in that: comprising a dismounting rod (1), a clamping unit (2) and a puller (3); one end of the dismounting rod (1) is a handle (11), the other end is connected with the clamping unit (2); a stop block (12) is arranged on the dismounting rod (1) inside the handle (11); the puller (3) is sleeved on the dismounting rod (1), and the puller (3) can slide between the stop block (12) and the clamping unit (2); the clamping unit (2) is used for clamping a bearing outer ring (4) to be dismounted, and comprises a pin disc (21) and a jack pin (22); an outer periphery of the pin disc (21) is provided with at least three threaded holes (21-1), and one jack pin (22) is arranged in each threaded hole (21-1); and an outer diameter of the pin disc (21) is smaller than an inner diameter of the bearing outer ring (4) to be dismounted.

2. The blind hole inner bearing outer ring dismounting device according to claim 1, characterized in that: the at least three jack pins (22) are uniformly distributed on the outer periphery of the pin disc (21), and each jack pin (22) comprises a head (22-1), a connecting section (22-2), an operating section (22-3) and a mounting section (22-4) connected in sequence; the head (22-1) is a spherical body at the front end, and is used for tightly pressing the bearing outer ring (4) to be dismounted; the connecting section (22-2) is a columnar body, one end of which is connected with the head (22-1), and the other end is connected with the operating section (22-3); the operating section (22-3) is provided with at least two corresponding clamping surfaces on the outer wall, and is used for installing a tool to clamp and install the jack pin (22); and the mounting section (22-4) is provided with an external thread on the outer wall.

3. The blind hole inner bearing outer ring dismounting device according to claim 1, characterized in that: the clamping unit (2) further comprises a connecting rod (23), one end of the connecting rod (23) is connected with the pin disc (21), and the other end is provided with an external thread and connected with a threaded hole arranged at the other end of the dismounting rod (1).

4. The blind hole inner bearing outer ring dismounting device according to claim 3, characterized in that: the puller (3) is a columnar body, and an axial through hole is arranged on the puller (3) for sleeving the puller (3) on the dismounting rod (1); one end of the puller (3) close to the clamping unit (2) is a circular arc transition, and the other end close to the stop block (12) is a flat end, an outer diameter of the flat end is greater than that of the end close to the clamping unit (2), and a middle part of the outer periphery of the puller (3) is a concave curved surface.

5. The blind hole inner bearing outer ring dismounting device according to claim 4, characterized in that: the stop block (12) is provided with a circular truncated cone close to one end of the puller (3), an outer diameter of the circular truncated cone is greater than a diameter of the axial through hole of the puller (3), and the other end close to the handle (11) is a conical truncated cone, a small end of the conical truncated cone is connected with the circular truncated cone, and the outer diameters of the two are the same.

6. The blind hole inner bearing outer ring dismounting device according to claim 1, characterized in that: three threaded holes (21-1) are uniformly arranged on the outer periphery of the pin disc (21).

7. The blind hole inner bearing outer ring dismounting device according to claim 1, characterized in that: the handle (11) is provided with knurling. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 8. The blind hole bearing outer race dismounting device according to claim 3, characterized in that: The handle (11), pin disc (21), ejector pin (22) and connecting rod (23) are all made of medium carbon steel material; The pull hammer (3) is made of high carbon chromium bearing steel material.

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