Main drive box bearing replacement device

Abstract

This utility model belongs to the field of filter rod production equipment maintenance technology and discloses a main drive box bearing replacement device. This main drive box bearing replacement device is used to replace the bearing on the shaft core of the main drive box, and includes an installation mechanism and a disassembly mechanism. The installation mechanism includes a press-fit guide assembly and a first clamping fixture. The first clamping fixture can fix the shaft core to an external fixed device. The press-fit guide assembly can be sleeved on the shaft core and is located at one end of the bearing inner ring. The press-fit guide assembly is used to guide and press the bearing inner ring. The disassembly mechanism includes a puller and a second clamping fixture. The second clamping fixture is connected to the outer circumference of the bearing inner ring. The puller end of the puller is connected to the second clamping fixture to remove the bearing inner ring from the shaft core. This main drive box bearing replacement device can reduce damage to the shaft core and bearing, maintain the original assembly accuracy of the equipment, reduce the time per maintenance, and extend the bearing service life.

Description

Technical Field

[0001] This utility model relates to the field of filter rod production equipment maintenance technology, and in particular to a main drive box bearing replacement device. Background Technology

[0002] Among filter rod forming units, the KDF4 filter rod forming unit is one of the most automated and capable filter rod production equipment in China. Its operational stability and precision directly determine the quality and production efficiency of the filter rod products.

[0003] The main drivebox, as the power transmission hub of the unit, has a decisive impact on the overall performance of its internal bearings. However, in actual maintenance, bearing replacement has long faced technical bottlenecks. Traditional tooling, due to design flaws, generally employs impact-based or non-positioning disassembly methods, which easily cause mechanical damage to the surface of high-precision shaft cores, leading to a chain reaction of problems such as excessive vibration values ​​in the transmission system and fluctuations in filter rod molding density. This results in increased average maintenance costs, longer equipment downtime, and severely restricts the improvement of production efficiency. During installation, traditional transmission tooling lacks a guiding structure, which can easily cause bearing tilting, resulting in uneven interference fit between the inner ring and the journal, affecting bearing life. Furthermore, it is difficult to accurately control the bearing preload; excessive tightness (excessive axial preload) can lead to abnormal temperature rise, while excessive looseness reduces transmission rigidity.

[0004] Therefore, there is an urgent need for a main drive box bearing replacement device to solve the above-mentioned technical problems. Utility Model Content

[0005] The purpose of this invention is to provide a main drive box bearing replacement device that can reduce damage to the shaft and bearing, maintain the original assembly accuracy of the equipment, reduce the time of each maintenance and extend the service life of the bearing.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] A main drivebox bearing replacement device is used to replace the bearings on the shaft core of the main drivebox; the aforementioned main drivebox bearing replacement device includes:

[0008] The installation mechanism includes a press-fit guide assembly and a first clamping fixture. The first clamping fixture can fix the shaft core to an external fixed device. The press-fit guide assembly can be sleeved on the shaft core and is located at one end of the bearing inner ring of the bearing. The press-fit guide assembly is used to guide and press-fit the bearing inner ring of the bearing.

[0009] The disassembly mechanism includes a puller and a second clamping fixture, the second clamping fixture being connected to the outer periphery of the bearing inner ring of the bearing, and the puller end of the puller being connected to the second clamping fixture, for disassembling the bearing inner ring of the bearing from the shaft core.

[0010] Optionally, the above-mentioned press-fitting guide assembly includes:

[0011] A locking ring is fitted onto the aforementioned shaft core. The locking ring is located at one end of the inner ring of the aforementioned bearing, and the locking ring abuts against the end face of the inner ring of the aforementioned bearing.

[0012] A locking fixture can be fitted onto the aforementioned shaft core. One end of the locking fixture is detachably connected to the aforementioned locking ring, and the other end is threadedly connected to an adjusting bolt. The adjusting bolt can be turned and push the locking fixture and the aforementioned locking ring to move along their own axial direction, so as to press the inner ring of the aforementioned bearing to the working position of the aforementioned shaft core.

[0013] Optionally, the outer periphery of the locking ring is provided with a plurality of snap-fit ​​grooves; one end of the locking fixture is provided with a plurality of snap-fit ​​protrusions along its own circumference, and the snap-fit ​​protrusions and the snap-fit ​​grooves are respectively matched and snap-fitted into each other.

[0014] Optionally, the first clamping fixture includes a first clamping half-ring and a second clamping half-ring, which are interlocked to clamp the shaft core.

[0015] Optionally, the above-mentioned mounting mechanism further includes a first locking bolt, one of the first clamping half ring and the second clamping half ring is provided with a first threaded hole, and the other is provided with a first through hole, and one end of the first locking bolt passes through the first through hole and is threadedly connected to the first threaded hole.

[0016] Optionally, the above-mentioned pulling member includes a pressure rod and a pulling part. The pressure rod is movably connected to the pulling part along its own axial direction. The pressure rod is connected to one end of the shaft core. The pulling part is engaged with the second clamping fixture. The pressure rod can move along its own axial direction so that the shaft core and the bearing inner ring of the bearing can move relative to each other in the axial direction.

[0017] Optionally, the disassembly mechanism further includes a protective seat, which covers one end of the shaft core, and the pressure rod is connected to the protective seat.

[0018] Optionally, the end of the protective seat away from the shaft core is provided with a slot, and the pressure rod is provided with a plug-in part, which is plugged into the slot.

[0019] Optionally, the second clamping mechanism includes a third clamping half-ring and a fourth clamping half-ring, which interlock to clamp the inner ring of the bearing.

[0020] Optionally, the disassembly mechanism further includes a second locking bolt. One of the third clamping half-ring and the fourth clamping half-ring is provided with a second threaded hole, and the other is provided with a second through hole. One end of the second locking bolt passes through the second through hole and is threadedly connected to the second threaded hole.

[0021] The beneficial effects of this utility model are:

[0022] This invention provides a main drivebox bearing replacement device. By incorporating an installation mechanism and a disassembly mechanism, a press-fit guide component is added during bearing installation. This guide component provides a certain degree of guidance during the press-fitting of the bearing inner ring, preventing bearing tilting, improving bearing installation reliability, extending bearing life, and reducing single maintenance time. Furthermore, a first clamping fixture protects the bearing inner ring, preventing the press-fitting force of the guide component from directly acting on the bearing inner ring and avoiding damage to the bearing and shaft. During bearing disassembly, a second clamping fixture protects the bearing inner ring, and then a pulling component pulls the second clamping fixture to remove the bearing inner ring, avoiding damage to the bearing and shaft and extending bearing life. Moreover, this replacement device is more convenient to install and remove, significantly shortening the installation and removal time and reducing the manpower required for installation and removal. Attached Figure Description

[0023] Figure 1 This is an exploded view of the installation mechanism provided in a specific embodiment of this utility model;

[0024] Figure 2 This is an exploded view of the disassembly mechanism provided in a specific embodiment of this utility model;

[0025] Figure 3 This is a front view of the mounting mechanism provided in a specific embodiment of the present invention, mounted on the shaft core;

[0026] Figure 4 This is a front view of the disassembly mechanism installed on the shaft core according to a specific embodiment of this utility model;

[0027] Figure 5 This is a schematic diagram of the structure of the locking ring provided in a specific embodiment of this utility model;

[0028] Figure 6 This is a cross-sectional view of the locking fixture provided in a specific embodiment of this utility model;

[0029] Figure 7This is a top view of the locking fixture provided in a specific embodiment of this utility model;

[0030] Figure 8 This is a schematic diagram of the structure of the first clamping fixture provided in a specific embodiment of this utility model;

[0031] Figure 9 This is a cross-sectional view of the protective base provided in a specific embodiment of this utility model;

[0032] Figure 10 This is a schematic diagram of the structure of the second clamping tool provided in a specific embodiment of this utility model.

[0033] In the picture:

[0034] 1. Shaft core; 101. Working position; 2. Bearing inner ring;

[0035] 10. Mounting mechanism; 11. Press-fit guide assembly; 111. Locking ring; 1111. Snap-fit ​​groove; 112. Locking fixture; 1121. Snap-fit ​​protrusion; 1122. Third threaded hole; 113. Adjusting bolt; 12. First clamping fixture; 121. First clamping half ring; 1211. First threaded hole; 122. Second clamping half ring; 1221. First through hole; 13. First locking bolt;

[0036] 20. Disassembly mechanism; 21. Second clamping fixture; 211. Third clamping half ring; 2111. Second threaded hole; 212. Fourth clamping half ring; 2121. Second through hole; 22. Second locking bolt; 23. Protective seat; 231. Slot. Detailed Implementation

[0037] The present invention 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 merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0038] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0039] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0040] In the description of this embodiment, the terms "upper," "lower," "left," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0041] This embodiment provides a main drive box bearing replacement device for replacing the bearing on the shaft core 1 of the main drive box; it can reduce damage to the shaft core 1 and the bearing, maintain the original assembly accuracy of the equipment, reduce the time of each maintenance and extend the service life of the bearing.

[0042] Please refer to Figures 1 to 4 Specifically, the main drive housing bearing replacement device includes an installation mechanism 10 and a disassembly mechanism 20. The installation mechanism 10 is used to install the bearing inner ring 2 of the bearing on the shaft core 1, and the disassembly mechanism 20 is used to disassemble the bearing inner ring 2 of the bearing that has already been installed on the shaft core 1.

[0043] like Figure 1 and Figure 3 As shown, the installation mechanism 10 includes a press-fit guide assembly 11 and a first clamping fixture 12. The first clamping fixture 12 can fix the shaft core 1 to an external fixed device. The press-fit guide assembly 11 can be sleeved on the shaft core 1 and is located at one end of the bearing inner ring 2 of the bearing. The press-fit guide assembly 11 is used to guide and press-fit the bearing inner ring 2 of the bearing. During installation, the large end of the shaft core 1 is first fixed by the first clamping fixture 12, and then the bearing inner ring 2 is sleeved on the shaft core 1 from the small end of the shaft core 1. Then, the press-fit guide assembly 11 is installed at one end of the bearing inner ring 2 and the press-fit guide assembly 11 is driven to press-fit the bearing inner ring 2 into the working position 101 of the shaft core 1.

[0044] like Figure 2 and Figure 4As shown, the disassembly mechanism 20 includes a pulling member and a second clamping fixture 21. The second clamping fixture 21 is connected to the outer periphery of the bearing inner ring 2 of the bearing. The pulling end of the pulling member is connected to the second clamping fixture 21 to disassemble the bearing inner ring 2 of the bearing from the shaft core 1. During disassembly, the bearing inner ring 2 is first clamped by the second clamping fixture 21, then the pulling end of the pulling member is installed on the second clamping fixture 21, and then the bearing inner ring 2 can be disassembled from the working position 101 of the shaft core 1 by pulling.

[0045] In this embodiment, the main drive box bearing replacement device, by setting up an installation mechanism 10 and a disassembly mechanism 20, adds a press-fit guide component 11 during bearing installation. This component provides guidance for the press-fitting of the bearing inner ring 2, preventing bearing tilting, improving bearing installation reliability, extending bearing life, and reducing single maintenance time. Furthermore, the first clamping fixture 12 protects the bearing inner ring 2, preventing the press-fitting force of the press-fit guide component 11 from directly acting on the bearing inner ring 2, thus avoiding damage to the bearing and shaft core 1. During bearing disassembly, the second clamping fixture 21 protects the bearing inner ring 2, and then the second clamping fixture 21 is pulled out by a puller, thus achieving disassembly of the bearing inner ring 2, avoiding damage to the bearing and shaft core 1, and extending bearing life. Moreover, this replacement device is more convenient to install and remove, greatly shortening the installation and removal time and reducing the manpower required for installation and removal.

[0046] It should be noted that in this embodiment, the external fixing device is a clamp. By clamping the first clamping fixture 12 with the clamp, the first clamping fixture 12 can be fixed to the external fixing device, thereby fixing the shaft core 1.

[0047] Please refer to Figure 1 , Figure 3 , Figures 5 to 7 In this embodiment, the press-fit guide assembly 11 includes a locking ring 111 and a locking fixture 112. The locking ring 111 can be fitted onto the shaft core 1 and is located at one end of the bearing inner ring 2 of the bearing. The locking ring 111 can abut against the end face of the bearing inner ring 2. The locking fixture 112 can be fitted onto the shaft core 1. One end of the locking fixture 112 is detachably connected to the locking ring 111, and the other end is threadedly connected to an adjusting bolt 113. The adjusting bolt 113 can be turned and push the locking fixture 112 and the locking ring 111 to move along their own axial direction to press the bearing inner ring 2 of the bearing to the working position 101 of the shaft core 1. Because it uses the adjusting bolt 113 to be threadedly connected to the locking fixture 112, the locking fixture 112 will also move along the axial direction of the shaft core 1 during the process of tightening the adjusting bolt 113, without any offset, thereby avoiding the problem of bearing tilting, improving the reliability of bearing installation, increasing the service life of the bearing, and reducing the time of a single maintenance.

[0048] When installing the bearing, after the inner ring 2 of the bearing is fitted onto the shaft core 1, the locking ring 111 is first fitted onto the shaft core 1 and abuts against one end of the inner ring 2 of the bearing. Then, the locking fixture 112 is installed so that the locking fixture 112 and the locking ring 111 are fixedly connected. Then, by turning the adjusting bolt 113, the locking fixture 112 and the locking ring 111 are pushed to move axially, thereby pushing the inner ring 2 of the bearing to the working position 101 of the shaft core 1.

[0049] It should be noted that the adjusting bolt 113 can be tightened using a torque wrench, which allows for adjustment of the axial preload during the installation of the bearing inner ring 2. For example, in this embodiment, when tightening the adjusting bolt 113, a torque of 124N is first applied to preload the bolt, then it is loosened and reset, and finally tightened with a torque of 42N. This ensures the bearing inner ring 2 is properly installed without damaging it.

[0050] Specifically, the locking ring 111 has a plurality of snap-fit ​​grooves 1111 along its circumferential direction on its outer periphery; one end of the locking fixture 112 has a plurality of snap-fit ​​protrusions 1121 along its circumferential direction, and the snap-fit ​​protrusions 1121 and the snap-fit ​​grooves 1111 are snapped into each other in a one-to-one manner, so that the locking ring 111 and the locking fixture 112 can be detachably connected, and the rotation of the locking fixture 112 can drive the locking ring 111 to rotate.

[0051] Furthermore, a third threaded hole 1122 is provided on the side of the locking fixture 112 away from the locking ring 111. The third threaded hole 1122 is used to install the adjusting bolt 113 to push the locking fixture 112.

[0052] Please refer to Figure 1 , Figure 3 and Figure 8 Furthermore, the first clamping fixture 12 includes a first clamping half-ring 121 and a second clamping half-ring 122. The first clamping half-ring 121 and the second clamping half-ring 122 are interlocked to clamp the shaft core 1, thereby locking and protecting the shaft core 1.

[0053] Specifically, the installation mechanism 10 also includes a first locking bolt 13, one of the first clamping half ring 121 and the second clamping half ring 122 is provided with a first threaded hole 1211, and the other is provided with a first through hole 1221. One end of the first locking bolt 13 passes through the first through hole 1221 and is threadedly connected to the first threaded hole 1211, so that the clamping effect of the first clamping fixture 12 on the shaft core 1 can be realized.

[0054] In this embodiment, the pulling component includes a pressure rod and a pulling part. The pressure rod is movably connected to the pulling part along its own axial direction. The pressure rod is connected to one end of the shaft core 1. The pulling part is engaged with the second clamping fixture 21. The pressure rod can move along its own axial direction, so that the shaft core 1 and the bearing inner ring 2 of the bearing can move relative to each other along the axial direction. In use, the driving pressure rod pushes the shaft core 1 to move in one direction. At this time, the position of the pulling part remains unchanged, thereby causing the first clamping fixture 12 and the shaft core 1 to undergo relative displacement, that is, the bearing inner ring 2 and the shaft core 1 to undergo relative displacement. This allows for the disassembly of the bearing inner ring 2 and the shaft core 1, saving time and effort, and avoiding damage to the bearing inner ring 2 and the shaft core 1.

[0055] Specifically, the pressure rod and the drawing part can be slidably connected or threadedly connected, which can be adapted to the actual driving structure of the drawing part, and is not specifically limited here.

[0056] Optionally, the drawing element can be a mechanical puller, hydraulic puller, or other puller structure, as long as it can achieve the pulling of the bearing. For example, in this embodiment, the drawing element is a mechanical puller.

[0057] Please refer to Figure 2 , Figure 4 and Figure 9 Furthermore, the disassembly mechanism 20 also includes a protective seat 23, which covers one end of the shaft core 1. The pressure rod is connected to the protective seat 23. The protective seat 23 prevents the pressure rod from directly contacting the shaft core 1, thus protecting the shaft core 1.

[0058] Optionally, the end of the protective seat 23 away from the shaft core 1 is provided with a slot 231, and the pressure rod is provided with a plug-in part, which is plugged into the slot 231 to improve the connection stability between the two.

[0059] Please refer to Figure 2 , Figure 4 and Figure 10 Furthermore, the second clamping fixture 21 includes a third clamping half ring 211 and a fourth clamping half ring 212, which are interlocked to clamp the bearing inner ring 2 of the bearing, thereby achieving locking and protection of the bearing inner ring 2.

[0060] Specifically, the disassembly mechanism 20 also includes a second locking bolt 22, one of the third clamping half ring 211 and the fourth clamping half ring 212 is provided with a second threaded hole 2111, and the other is provided with a second through hole 2121. One end of the second locking bolt 22 passes through the second through hole 2121 and is threadedly connected to the second threaded hole 2111, so that the second clamping fixture 21 can clamp the bearing inner ring 2.

[0061] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A main transmission case bearing replacement device characterized by, Used to replace the bearing on the shaft core (1) of the main transmission box; the main transmission box bearing replacement device includes: The mounting mechanism (10) includes a press-fit guide assembly (11) and a first clamping fixture (12). The first clamping fixture (12) can fix the shaft core (1) to an external fixing device. The press-fit guide assembly (11) can be sleeved on the shaft core (1) and is located at one end of the bearing inner ring (2) of the bearing. The press-fit guide assembly (11) is used to guide and press-fit the bearing inner ring (2) of the bearing. The disassembly mechanism (20) includes a puller and a second clamping fixture (21), the second clamping fixture (21) being connected to the outer periphery of the bearing inner ring (2) of the bearing, and the puller end of the puller being connected to the second clamping fixture (21) to disassemble the bearing inner ring (2) of the bearing from the shaft core (1).

2. The main drive case bearing replacement device of claim 1, wherein, The press-fit guide assembly (11) includes: A locking ring (111) can be fitted onto the shaft core (1). The locking ring (111) is located at one end of the bearing inner ring (2) of the bearing. The locking ring (111) can abut against the end face of the bearing inner ring (2). A locking fixture (112) can be fitted onto the shaft core (1). One end of the locking fixture (112) is detachably connected to the locking ring (111), and the other end is threadedly connected to an adjusting bolt (113). The adjusting bolt (113) can be turned and push the locking fixture (112) and the locking ring (111) to move along their own axial direction to press the bearing inner ring (2) of the bearing to the working position (101) of the shaft core (1).

3. The main drive case bearing replacement device of claim 2, wherein, The locking ring (111) has a plurality of snap-fit ​​grooves (1111) on its outer periphery along its circumferential direction; one end of the locking fixture (112) has a plurality of snap-fit ​​protrusions (1121) protruding along its circumferential direction, and the snap-fit ​​protrusions (1121) and the snap-fit ​​grooves (1111) are snapped into each other in a one-to-one correspondence.

4. The main drive case bearing replacement device of claim 1, wherein, The first clamping fixture (12) includes a first clamping half ring (121) and a second clamping half ring (122), which are fastened together to clamp the shaft core (1).

5. The main drive case bearing replacement device of claim 4, wherein, The mounting mechanism (10) further includes a first locking bolt (13). One of the first clamping half ring (121) and the second clamping half ring (122) is provided with a first threaded hole (1211), and the other is provided with a first through hole (1221). One end of the first locking bolt (13) passes through the first through hole (1221) and is threadedly connected to the first threaded hole (1211).

6. The main drive case bearing replacement device of claim 1, wherein, The pulling member includes a pressure rod and a pulling part. The pressure rod is movably connected to the pulling part along its own axial direction. The pressure rod is connected to one end of the shaft core (1). The pulling part is engaged with the second clamping fixture (21). The pressure rod can move along its own axial direction so that the shaft core (1) and the bearing inner ring (2) of the bearing can move relative to each other along the axial direction.

7. The main drive case bearing replacement device of claim 6, wherein, The disassembly mechanism (20) also includes a protective seat (23), which covers one end of the shaft core (1), and the pressure rod is connected to the protective seat (23).

8. The main drive case bearing replacement device of claim 7, wherein, The protective seat (23) has a slot (231) at one end away from the shaft (1), and the pressure rod has a plug-in part, which is plugged into the slot (231).

9. The main drive case bearing replacement device of claim 1, wherein, The second clamping includes a third clamping half-ring (211) and a fourth clamping half-ring (212), which are interlocked to clamp the bearing inner ring (2) of the bearing.

10. The main drive case bearing replacement device of claim 9, wherein, The disassembly mechanism (20) further includes a second locking bolt (22). One of the third clamping half ring (211) and the fourth clamping half ring (212) is provided with a second threaded hole (2111), and the other is provided with a second through hole (2121). One end of the second locking bolt (22) passes through the second through hole (2121) and is threadedly connected to the second threaded hole (2111).

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