Bearing dismounting mechanism for live center

Abstract

The utility model discloses a bearing dismounting mechanism for a live center. The live center comprises a live center shell with one end open and a bearing arranged in a bearing cavity of the live center shell. At least the inner edge of the end face, away from the open end, of the bearing is suspended to form a disassembly face. The dismounting structure comprises a threaded rod, a dismounting inner cone fixed to the end of the threaded rod, a dismounting outer ring arranged on the outer side of the dismounting inner cone in a sliding and sleeving mode in the axial direction of the threaded rod, and a limiting nut connected to the threaded rod in a threaded mode. The outer circular surface of the outer dismounting ring can be deformed, and the limiting nut can adjust the axial position of the outer dismounting ring on the threaded rod, so that the inner dismounting cone relatively extrudes the outer dismounting ring in the axial direction, and the outer diameter of the outer dismounting ring is adjusted; according to the bearing dismounting mechanism for the live center, a bearing can be rapidly dismounted by means of a narrow space of a bearing inner ring, meanwhile, damage to the bearing is avoided, and it is guaranteed that the dismounted bearing can be repeatedly used.

Description

Technical Field

[0001] This utility model relates to the field of live center technology, specifically to a bearing disassembly mechanism for live centers. Background Technology

[0002] A rotating center, also known as a slewing center, is a machine tool component used in machining to support the workpiece. It contains an internal bearing structure that rotates with the workpiece, thereby reducing friction and heat accumulation. Compared to a fixed center, a rotating center is more suitable for high-speed machining, maintaining workpiece stability during high-speed rotation. The rotating center contains rolling or sliding bearings, allowing its tip to rotate synchronously with the workpiece. This structural design effectively reduces frictional resistance between the workpiece and the center. However, due to the limited space within the bearing cavity of the rotating center, disassembly is difficult and prone to damage, affecting both the bearing and the rotational accuracy of the rotating center. Therefore, it is necessary to propose a bearing disassembly mechanism for rotating centers. Utility Model Content

[0003] The purpose of this invention is to propose a bearing disassembly mechanism for live-center bearings, which can quickly disassemble the bearing by utilizing the narrow space of the bearing inner ring, while avoiding damage to the bearing and ensuring that the disassembled bearing can be reused.

[0004] The technical solution adopted in this utility model is: a bearing disassembly mechanism for a live center, the live center including a live center housing with one open end and a bearing disposed in the bearing cavity of the live center housing; the end face of the bearing away from the open end is suspended at least at its inner edge, forming a disassembly surface;

[0005] The disassembly structure includes a threaded rod, a disassembly inner cone fixed to the end of the threaded rod, a disassembly outer ring slidably sleeved on the outside of the disassembly inner cone along the axial direction of the threaded rod, and a limiting nut threadedly connected to the threaded rod; the outer circular surface of the disassembly outer ring is deformable, and the limiting nut can adjust the axial position of the disassembly outer ring on the threaded rod, so that the disassembly inner cone axially presses against the disassembly outer ring to adjust the outer diameter of the disassembly outer ring;

[0006] The outer circular surface of the disassembly outer ring is provided with an annular flange, which can switch between a first state and a second state as the outer diameter of the disassembly outer ring changes.

[0007] In the first state, the outer diameter of the annular flange is smaller than the inner diameter of the bearing inner ring, so that the annular flange can pass through the inner ring of the bearing from the open end of the live center housing and move to the disassembly side.

[0008] In the second state, the outer diameter of the annular flange is larger than the inner diameter of the bearing inner ring, allowing the annular flange to expand radially outward to hook onto the disassembly surface.

[0009] As a preferred embodiment, an annular flange is located at one end of the disassembly outer ring, and the end face of this end is provided with multiple shrinkage slits extending along the axial direction of the disassembly outer ring. The shrinkage slits penetrate the annular flange and divide the annular flange into multiple segments.

[0010] As a preferred embodiment, the inner circular surface of the disassembled outer ring is a conical surface.

[0011] As a preferred embodiment, the outer circular surface of the disassembled inner cone is a conical surface.

[0012] As a preferred embodiment, the device also includes a linear actuator capable of synchronously moving the outer ring and the inner cone of the disassembly along the bearing axial direction, wherein the linear actuator is detachably connected to the end of the threaded rod.

[0013] As a preferred embodiment, the linear actuator is fixed with a disassembly outer plate, which has an abutment surface corresponding to the open end of the live center housing.

[0014] As a preferred embodiment, the abutment surface of the disassembled outer plate has a accommodating cavity in the middle for axially extending the bearing cavity of the live-center housing.

[0015] As a preferred option, the disassembly inner cone center has a threaded hole that matches the threaded rod.

[0016] As a preferred embodiment, a stop nut is threaded onto the threaded rod, and the stop nut rests on the end face of the disassembly inner cone.

[0017] As a preferred embodiment, the thickness of the annular flange in the radial direction of the disassembly outer ring is 2 mm.

[0018] Compared with the prior art, the beneficial effects of this utility model are:

[0019] 1. This utility model utilizes the bearing cavity space of the live center housing by disassembling the outer ring and disassembling the inner cone to insert into the inner ring of the bearing; by removing the bearing along the axial direction of the bearing, bearing wear can be reduced and bearing damage can be avoided.

[0020] 2. This utility model has a simple structure and is easy to operate, which can improve the efficiency of disassembling the live center. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1This is a schematic diagram of the live top to be disassembled;

[0023] Figure 2 This is a schematic cross-sectional view of the present invention;

[0024] Figure 3 This is a schematic diagram of the present invention in a disassembled state;

[0025] Figure 4 This is a partial cross-sectional schematic diagram of the present invention;

[0026] Figure 5 This is a schematic cross-sectional view of the disassembled outer ring of this utility model;

[0027] Figure 6 This is a schematic diagram of the disassembled inner cone section of this utility model.

[0028] Reference numerals: 1. Live center housing, 2. Bearing, 201. Disassembly surface, 3. Linear actuator, 4. Disassembly outer ring, 401. Annular flange, 402. Contraction joint, 5. Disassembly inner cone, 6. Disassembly outer plate, 7. Threaded rod, 8. Limit nut, 9. Stop nut. Detailed Implementation

[0029] The present invention will now be described in detail through exemplary embodiments. However, it should be understood that, without further description, elements, structures, and features in one embodiment may be advantageously incorporated into other embodiments.

[0030] It should be noted that, unless otherwise defined, the technical or scientific terms used herein should have the ordinary meaning understood by one of ordinary skill in the art to which this utility model pertains. The terms "a," "an," or "the," etc., used in the specification and claims of this utility model patent application do not express a quantity limitation, but rather indicate the presence of at least one; the terms "first," "second," and "third," as used herein, should not be considered as a limitation on the order of components, but are merely for distinguishing different components; the terms "comprising" or "including," etc., indicate that the elements or objects preceding "comprising" or "including" encompass the elements or objects listed following "comprising" or "including" and their equivalents, but do not exclude other elements or objects having the same function.

[0031] To more clearly describe the specific structural components of the bearing disassembly mechanism for the live center, see attached... Figure 1-6 This embodiment is described as follows:

[0032] like Figure 1 As shown, the live center includes a live center housing 1 with one end open and a bearing 2 disposed in the bearing cavity of the live center housing 1. The end face of the bearing 2 away from the open end is suspended at least at its inner edge, forming a disassembly surface 201.

[0033] like Figure 2-6 As shown, a bearing disassembly mechanism for a live center includes a threaded rod 7, a disassembly inner cone 5 fixed to the end of the threaded rod 7, a disassembly outer ring 4 slidably sleeved on the outside of the disassembly inner cone 5 along the axial direction of the threaded rod 7, and a limiting nut 8 threadedly connected to the threaded rod 7. The outer circular surface of the disassembly outer ring 4 is deformable, and the limiting nut 8 can adjust the axial position of the disassembly outer ring 4 on the threaded rod 7, so that the disassembly inner cone 5 axially presses against the disassembly outer ring 4 to adjust the outer diameter of the disassembly outer ring 4. An annular flange 401 is provided on the outer circular surface of the disassembly outer ring 4, and the annular flange 401 can switch between a first state and a second state as the outer diameter of the disassembly outer ring 4 changes.

[0034] In the first state, the outer diameter of the annular flange 401 is smaller than the inner diameter of the inner ring of the bearing 2, so that the annular flange 401 can pass through the inner ring of the bearing 2 from the open end of the live center housing 1 and move to the disassembly surface 201 side; in the second state, the outer diameter of the annular flange 401 is larger than the inner diameter of the inner ring of the bearing 2, so that the annular flange 401 can expand radially outward to hook the disassembly surface 201.

[0035] See Figure 4 An annular flange 401 is located at one end of the disassembly outer ring 4. Multiple contraction grooves 402 extending axially along the disassembly outer ring 4 are provided on the end face of this flange. The contraction grooves 402 penetrate the annular flange 401 and divide the annular flange 401 into multiple segments. The disassembly outer ring 4 can be made of metal, and its outer surface is deformable. The inner surface of the disassembly outer ring 4 is a conical surface. The position of the disassembly inner cone 5 on the threaded rod 7 is fixed. By pressing the end face of the disassembly outer ring 4 with the limiting nut 8, the position of the disassembly inner cone 5 within the disassembly outer ring 4 can be adjusted.

[0036] When the limiting nut 8 pushes the disassembly outer ring 4 to move continuously toward the disassembly inner cone 5, the disassembly inner cone 5 presses against the conical surface of the disassembly outer ring 4, i.e., the first state changes to the second state. At this time, the width of the contraction gap 402 increases, and the outer diameter of the annular flange 401 increases. When the limiting nut 8 moves away from the disassembly outer ring 4, under the elastic recovery of the outer circular surface of the disassembly outer ring 4, the disassembly outer ring 4 moves away from the disassembly inner cone 5, i.e., the second state changes to the first state. At this time, the width of the contraction gap 402 decreases, and the outer diameter of the annular flange 401 decreases. In the radial direction of the disassembly outer ring 4, the thickness of the annular flange 401 only needs to be 2mm.

[0037] See Figure 6The outer surface of the disassembly inner cone 5 is a conical surface, which can fit with the inner surface of the disassembly outer ring 4, making the operation smoother. The disassembly inner cone 5 is detachably connected to the threaded rod. Specifically, the disassembly inner cone 5 has a threaded hole in the center that matches the threaded rod 7. A stop nut 9 is threaded on the threaded rod 7. The stop nut 9 rests on the end face of the disassembly inner cone 5 to limit the axial position of the disassembly inner cone 5 on the threaded rod 7.

[0038] See Figure 2 and Figure 3 It also includes a linear actuator 3 that can drive the outer ring 4 and the inner cone 5 to move synchronously along the bearing 2 axis. The linear actuator 3 is detachably connected to the end of the threaded rod 7. The linear actuator 3 can be a hydraulic cylinder, a jack, etc. In a specific design, the linear actuator 3 is a hollow jack. The threaded rod 7 passes through the hollow piston rod of the hollow jack. A nut is connected to the threaded rod 7 so that the hollow piston rod holds the nut and drives the threaded rod 7 to move.

[0039] To ensure the stability of the linear actuator 3, a disassembly plate 6 is fixed on the linear actuator 3. The disassembly plate 6 has a contact surface corresponding to the open end of the live center housing 1. After the disassembly plate 6 abuts against the live center housing 1, the bearing 2 is carried out by the linear actuator 3.

[0040] If the axial length of the bearing cavity of the live center housing 1 is insufficient, a receiving cavity for axially extending the bearing cavity of the live center housing 1 can be provided in the middle of the abutment surface of the disassembly outer plate 6, so as to ensure that there is enough axial space for the bearing 2 to be completely separated from the bearing cavity when the disassembly outer plate 6 abuts with the live center housing 1.

[0041] During the specific disassembly process:

[0042] First, assemble the threaded rod 7, the outer ring 4, the inner cone 5, and the limiting nut 8 into place. Press the limiting nut 8 onto the end face of the outer ring 4. Rotate the limiting nut 8 to make the inner circle of the outer ring 4 and the outer circle of the inner cone 5 fit together. At this time, it is in the first state, and the outer diameter of the annular flange 401 is smaller than the inner diameter of the inner ring of the bearing 2.

[0043] The threaded rod 7 passes through the inner ring of the bearing 2 from the open end of the live center housing 1 along the axial direction of the live center housing 1 and moves to the disassembly surface 201 side.

[0044] Continue to rotate the limiting nut 8 to switch from the first state to the second state. The outer ring 4 moves toward the inner cone 5. Under the pressure of the inner cone 5, the end of the outer ring 4 with the annular flange 401 expands outward and the diameter increases (greater than the inner diameter of the inner ring of the bearing 2). At this time, the annular flange 401 hooks onto the disassembly surface 201 on the inner side of the inner ring of the bearing 2.

[0045] The linear actuator 3 with the disassembly outer plate 6 is mounted on the live center housing 1. The contact surface of the disassembly outer plate 6 rests against the open end of the live center housing 1. The linear actuator 3 drives the threaded rod 7, the disassembly outer ring 4, and the disassembly inner cone 5 to move axially in sync. The bearing 2 is separated from the bearing cavity it is in through the annular flange 401. Then the linear actuator 3 is separated from the threaded rod 7, and the bearing 2 is removed.

[0046] The parts not described in detail in the above embodiments are prior art. It should be noted that although the present invention has been described through the above embodiments, the present invention may have many other embodiments. Without departing from the spirit and scope of the present invention, those skilled in the art can obviously make various corresponding changes and modifications to the present invention, but these changes and modifications should all fall within the scope of protection of the appended claims and their equivalents.

Claims

1. A bearing disassembly mechanism for a live center, the live center comprising a live center housing (1) open at one end and a bearing (2) disposed in the bearing cavity of the live center housing (1); the bearing (2) is suspended at least at its inner edge away from the open end, forming a disassembly surface (201), characterized in that: The disassembly structure includes a threaded rod (7), a disassembly inner cone (5) fixed to the end of the threaded rod (7), a disassembly outer ring (4) slidably sleeved on the outside of the disassembly inner cone (5) along the axial direction of the threaded rod (7), and a limiting nut (8) threadedly connected to the threaded rod (7); the outer circular surface of the disassembly outer ring (4) is deformable, and the limiting nut (8) can adjust the axial position of the disassembly outer ring (4) on the threaded rod (7), so that the disassembly inner cone (5) axially presses against the disassembly outer ring (4) to adjust the outer diameter of the disassembly outer ring (4); The outer circular surface of the disassembly outer ring (4) is provided with an annular flange (401), which can switch between a first state and a second state as the outer diameter of the disassembly outer ring (4) changes; In the first state, the outer diameter of the annular flange (401) is smaller than the inner diameter of the inner ring of the bearing (2), so that the annular flange (401) can pass through the inner ring of the bearing (2) from the open end of the live center housing (1) and move to the disassembly surface (201) side. In the second state, the outer diameter of the annular flange (401) is larger than the inner diameter of the inner ring of the bearing (2), so that the annular flange (401) can expand radially outward to hook the disassembly surface (201).

2. The bearing disassembly mechanism for a live center according to claim 1, characterized in that: An annular flange (401) is located at one end of the disassembly outer ring (4), and multiple shrinkage slits (402) extending along the axial direction of the disassembly outer ring (4) are provided on the end face of the flange. The shrinkage slits (402) penetrate the annular flange (401) and divide the annular flange (401) into multiple segments.

3. The bearing disassembly mechanism for a live center according to claim 1, characterized in that: The inner circular surface of the disassembled outer ring (4) is a conical surface.

4. A bearing disassembly mechanism for a live center according to claim 1, characterized in that: The outer circular surface of the disassembled inner cone (5) is a cone surface.

5. A bearing disassembly mechanism for a live center according to claim 1, characterized in that: It also includes a linear actuator (3) that can drive the outer ring (4) and the inner cone (5) to move synchronously along the bearing (2) axis, and the linear actuator (3) is detachably connected to the end of the threaded rod (7).

6. A bearing disassembly mechanism for a live center according to claim 5, characterized in that: A disassembly plate (6) is fixed on the linear actuator (3), and the disassembly plate (6) has an abutment surface corresponding to the open end of the live center housing (1).

7. A bearing disassembly mechanism for a live center according to claim 6, characterized in that: The abutment surface of the disassembled outer plate (6) has a accommodating cavity in the middle for axially extending the bearing cavity of the live-center housing (1).

8. A bearing disassembly mechanism for a live center according to claim 1, characterized in that: The disassembled inner cone (5) has a threaded hole at its center that is compatible with the threaded rod (7).

9. A bearing disassembly mechanism for a live center according to claim 8, characterized in that: A stop nut (9) is threaded onto the threaded rod (7), and the stop nut (9) rests on the end face of the disassembly inner cone (5).

10. A bearing disassembly mechanism for a live center according to claim 1, characterized in that: In the radial direction of the disassembly outer ring (4), the thickness of the annular flange (401) is 2 mm.

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