A tool for disassembling an inner sleeve from a double-layered sleeve

Abstract

The utility model relates to a tool for disassembling inner sleeve from double-layer shaft sleeve, including screw rod, sleeve cap and lower cover subassembly, the screw rod includes nut assembly and screw rod, nut assembly includes the nut of screw rod thread cooperation, screw rod can pass through inner sleeve and the outer sleeve of double-layer shaft sleeve, the top and bottom of sleeve cap are provided with top opening and bottom opening respectively, which can be screwed by screw rod, top opening is smaller than the outer diameter of nut assembly, bottom opening is larger than the outer diameter of inner sleeve, smaller than the outer diameter of outer sleeve, so that inner sleeve can enter sleeve cap, lower cover subassembly includes lower cover nut, the internal thread of lower cover nut can be connected with the external thread of screw rod, so that lower cover nut can be screwed on screw rod, the outer diameter of lower cover subassembly is larger than the inner diameter of inner sleeve, smaller than the inner diameter of outer sleeve, also smaller than bottom opening, the utility model has the characteristics of simple, efficient, safe.

Description

Technical Field

[0001] This utility model relates to a disassembly tool, and more particularly to a tool for removing the inner sleeve from a double-layer bushing. Background Technology

[0002] Double-layer bushings protect the rotating shaft. Typically, the outer bushing is a rigid structure (e.g., stainless steel), while the inner bushing is made of plastic (e.g., nylon). Prolonged use will cause the inner bushing to wear, age, and deform, necessitating periodic replacement. Because the inner and outer bushings are tightly fitted, replacement is time-consuming and laborious. This difficulty is further increased when the outer bushing's support legs are non-removably fixed to its base plane, resulting in insufficient clearance between the inner bushing and the base, hindering the operation of conventional tools.

[0003] Diatomaceous earth is a natural filter medium commonly used in beer brewing to adsorb and remove suspended particles such as yeast and proteins. The bushing of a diatomaceous earth tank is a double-layered bushing as described above, with its outer sleeve fixed non-removably to a base plane inside the tank. Only a very small gap remains between the inner sleeve and the base, making it impossible to use a screwdriver or sufficient space to push the nylon sleeve out from the bottom. It can only be removed from the top by using a hammer and chisel to break up the worn nylon sleeve, resulting in the following disadvantages:

[0004] 1. Low efficiency: It takes 1.5 hours and 2 people to complete the replacement, which requires a lot of manpower and long maintenance time, affecting production.

[0005] 2. Low safety: When using a hammer for destructive demolition, the confined space makes it inconvenient to stand or squat, regardless of the position. Prolonged use may lead to loss of balance and slipping, causing injury. Additionally, the confined space increases the risk of being struck by a hammer.

[0006] 3. Quality risks: Destructive demolition using a hammer will generate a lot of debris. If it is not cleaned up, it may enter the Clean In Place (CIP) return pump through the pipeline, which may damage the pump turbine. In addition, it may also enter the CIP alkali tank through the pipeline, posing a food safety risk.

[0007] 4. Increased costs: Using hammers and chisels for destructive disassembly can easily damage adjacent equipment, increasing the difficulty and cost of maintenance.

[0008] Therefore, given the various shortcomings of the current replacement process, there is an urgent need to research a disassembly tool that can not only meet the requirements of cost efficiency, but also greatly improve personnel safety and food safety. Utility Model Content

[0009] To solve at least one of the above problems, the present invention provides a tool for removing the inner sleeve from a double-layer bushing, comprising a lead screw, a sleeve cap, and a lower cover assembly; the lead screw includes a lead nut assembly and a screw rod; the lead nut assembly includes a lead nut that is threadedly engaged with the screw rod; the screw rod can pass through the inner sleeve and the outer sleeve of the double-layer bushing;

[0010] The cap has a top opening and a bottom opening that allow the screw to pass through; the top opening is smaller than the outer diameter of the nut assembly; the bottom opening is larger than the outer diameter of the inner sleeve and smaller than the outer sleeve, so that the inner sleeve can enter the cap.

[0011] The lower cover assembly includes a lower cover nut; the internal thread of the lower cover nut can be engaged with the external thread of the screw, so that the lower cover nut can be tightened onto the screw; the outer diameter of the lower cover assembly is larger than the inner diameter of the inner sleeve, smaller than the inner diameter of the outer sleeve, and smaller than the bottom opening.

[0012] In some implementations, the axial length of the section on the screw that mates with the nut thread is not less than the axial length of the inner sleeve; the axial length of the cap is not less than the axial length of the inner sleeve, so that the inner sleeve can be completely fitted into the cap.

[0013] In some implementations, the distance from the top of the section of the screw that mates with the nut to the locking position of the lower cap nut is not less than the sum of the axial length of the inner sleeve and the axial length of the cap.

[0014] In some implementation schemes, the cap is provided with an observation hole.

[0015] In some implementations, observation holes are located on the side wall of the cap. Further, the observation holes are multiple holes arranged axially along the cap, or axially extending openings. The observation holes are used to observe the degree to which the inner sleeve enters the cap.

[0016] In some embodiments, the nut assembly further includes a first washer that can be inserted onto the screw for padding between the cap and the nut; the outer diameter of the first washer is larger than the inner diameter and top opening of the nut.

[0017] In some implementations, the upper surface of the lower cover nut is provided with an annular boss; the outer diameter of the annular boss is smaller than the inner diameter of the inner sleeve, or is equivalent to the inner diameter of the inner sleeve and can be inserted into the inner sleeve; the outer diameter of the lower cover nut is larger than the inner diameter of the inner sleeve.

[0018] In some implementations, the lower cover assembly further includes a second gasket; the outer diameter of the second gasket is larger than the inner diameter of the inner sleeve; the second gasket is used to be positioned between the lower cover nut and the inner sleeve so that the lower cover assembly can fit tightly against the inner sleeve.

[0019] In some implementations, a handle is also included; the handle is located at the top of the screw.

[0020] In some embodiments, the handle is detachably mounted on the top of the screw. Further, the handle is detachably mounted on the top of the screw via a pin and / or thread. Further, the handle is a quincunx handle or a rod-shaped handle; when rod-shaped, the handle forms an L-shape or a T-shape with the screw.

[0021] In some implementations, the outer contour of the nut mates with the contact surface of the wrench, which facilitates the rotation of the nut using the wrench.

[0022] In some implementations, the screw includes a first threaded section and a second threaded section; the first threaded section is closer to the bottom of the screw than the second threaded section and is used for tightening and securing the lower cover assembly; the second threaded section is used for threaded engagement with the nut.

[0023] In some implementations, the screw includes a threaded section; when the lower cover assembly is screwed onto the threaded section, it is closer to the bottom of the screw than the nut passing through the threaded section.

[0024] This utility model also provides a tool for disassembling the bushing of a diatomaceous earth container, which is a tool for removing the inner sleeve from a double-layer bushing as described above. The lower cover assembly is configured such that when it is screwed onto the screw and abuts against the lower edge of the inner sleeve, the axial distance from the bottom of the screw to the lower edge of the inner sleeve is not greater than the distance from the lower edge of the inner sleeve to the vertical surface of the double-layer bushing.

[0025] The tool provided by this utility model, especially the diatomaceous earth can bushing disassembly tool, is characterized by its simplicity, efficiency, and safety, as detailed below:

[0026] 1) Improved maintenance efficiency: The time for a single maintenance session has been reduced from 1.5 hours to 10 minutes, improving maintenance efficiency and reducing the impact of equipment maintenance on production.

[0027] 2) Reduced labor costs: The tools are easy and quick to use, requiring no professional technicians to operate. Ordinary workers can use them after simple training, reducing reliance on highly skilled labor.

[0028] 3) Low implementation cost: When machining tools, you only need to design drawings based on bushings of different sizes and hand them over to the machining plant. Tool manufacturing can be completed at a low cost. In addition, the tool can be reused. As long as there are no special bushing models that need to be redesigned, there are basically no subsequent maintenance costs.

[0029] 4) Safety benefits: Risk control and simplified operation eliminate the risk of impact injury: Traditional hammering methods have hidden dangers such as tools slipping from hands and fragments flying, while this tool achieves impact-free disassembly through mechanical transmission, eliminating such risks.

[0030] 5) Social benefits: Promote industry standardization and popularization to improve the level of the repair industry: The tools are easy to operate and have stable effects, which can promote small repair enterprises to adopt standardized operating procedures and reduce service quality fluctuations caused by technical differences.

[0031] 6) Environmental protection and sustainability: Reduce waste generated by damaged parts (such as scrapped bearings), while tool materials can be recycled, which is in line with the concept of green manufacturing.

[0032] 7) Empowering grassroots technicians: By standardizing tools, the operational threshold is lowered, the popularization of technical skills is promoted, and the gap in maintenance capabilities between different regions and enterprises is narrowed. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the main view of the diatomaceous earth tank bushing.

[0034] Figure 2 for Figure 1 Cross-sectional view along the AA direction.

[0035] Figure 3 for Figure 1 The diagram shows a three-dimensional structural schematic of the diatomaceous earth tank bushing.

[0036] Figure 4 This is a schematic diagram of the main view of the tool for removing the inner sleeve from the double-layer bushing in Example 1.

[0037] Figure 5 This is a schematic diagram of the axial cross-sectional structure of the cap in Example 1.

[0038] Figure 6 This is a schematic diagram of the axial cross-sectional structure of the lower cover nut in Example 1.

[0039] Figure 7 This is a schematic diagram of the main view of the tool for removing the inner sleeve from the double-layer bushing in Embodiment 2.

[0040] Figure 8 for Figure 7 Cross-sectional view along the BB direction.

[0041] Figure 9 for Figure 7 The diagram shows a three-dimensional structure of a tool for removing the inner sleeve from a double-layer bushing. Detailed Implementation

[0042] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0043] In the description of this utility model, it should be understood that if terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, 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.

[0044] In the description of this utility model, the term "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0045] In this utility model, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "set up," "connected," "joined," "fixed," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral part; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0046] In this utility model, unless otherwise explicitly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact, or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0047] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this invention are for illustrative purposes only and do not represent the only possible implementation.

[0048] In this article, "and / or" means that both can exist together, or one of them can exist. For example, A and / or B means that it can be A and B, or it can be A, or it can be B.

[0049] like Figure 1-3 As shown, the diatomaceous earth tank bushing is a double-layer bushing consisting of an outer sleeve 1 and an inner sleeve 2. The outer sleeve 1 is generally a rigid metal structure such as stainless steel; the inner sleeve 2 is generally made of nylon, hence it is also called a nylon sleeve. The inner sleeve 2 is fitted inside the outer sleeve 1 and is tightly connected, making it difficult to disassemble without tools. The outer sleeve 1 is fixed to the bottom plate 4 of the diatomaceous earth tank by three support legs 3. There is a certain gap 5 between the bottom plate 4 and the lower edge of the inner sleeve 1, but not enough to push the inner sleeve 2 upward through the gap 5 using conventional tools such as screwdrivers.

[0050] Example 1

[0051] Figure 4 An embodiment of the tool for removing the inner sleeve from a double-layer bushing according to the present invention is shown, more specifically, a tool for removing a diatomaceous earth can bushing. The tool includes a handle 11, a lead screw, a cap 15, and a lower cover assembly 17. The lead screw includes a nut 13 and a screw 12 that are threaded together, and a first washer 14. The screw 12 can pass through the inner sleeve 2 and the outer sleeve 1 of the double-layer bushing. Figure 2 The nut 13 and the first gasket 14 together form the nut assembly.

[0052] The cap 15 has a top opening 151 and a bottom opening 152, respectively, through which the screw 12 can pass. Figure 5 The top opening 151 is smaller than the outer diameter of the first gasket 14; the bottom opening 152 is larger than the outer diameter of the inner sleeve 2 but smaller than the outer diameter of the outer sleeve 1, allowing the inner sleeve 1 to enter the cap 15. Figure 3 The first washer 14 is used to place between the cap 15 and the nut 13; the outer diameter of the first washer 14 is larger than the inner diameter of the nut.

[0053] The lower cover assembly 17 is a lower cover nut (i.e., the lower cover assembly 17 only includes the lower cover nut). The internal thread of the lower cover nut can be engaged with the external thread of the screw 12, so that the lower cover nut can be tightened onto the screw 12. The outer diameter of the lower cover assembly 17 is larger than the inner diameter of the inner sleeve 2, smaller than the inner diameter of the outer sleeve 1, and smaller than the bottom opening 152.

[0054] The axial length of the section of the screw 12 that threads with the nut 13 is not less than the axial length of the inner sleeve 2; the axial length of the cap 15 is not less than the axial length of the inner sleeve 2, so that the inner sleeve 2 can be completely fitted into the cap 15. An observation hole 16 is provided on the side wall of the cap 15. The observation hole 16 is an axially extending opening. The observation hole 16 is used to observe the degree to which the inner sleeve 2 enters the cap 15. In this embodiment, two observation holes 16 are symmetrically arranged.

[0055] The handle 11 is mounted on the top of the screw 12 via a pin and is a quincunx-shaped handle. The pin passes through the round hole 18 on the handle and the hole on the screw to fix the handle 11 to the top of the screw 12. In this embodiment, a thread is also used to fix the handle 11.

[0056] The outer contour of the nut 13 matches the contact surface of the wrench, which is beneficial for rotating the nut with the wrench.

[0057] The screw 12 includes a threaded section; when the lower cover nut is tightened onto the threaded section, it is closer to the bottom of the screw 12 than the nut 13 passing through the threaded section. The lower cover nut is configured such that when it is tightened onto the screw 12 and abuts against the lower edge of the inner sleeve 2, the axial distance from the bottom of the screw 12 to the lower edge of the inner sleeve 2 is not greater than the distance from the lower edge of the inner sleeve 2 to the vertical surface of the double-layer bushing (i.e., Figure 3 The distance from the base plate 4). An annular boss 171 is provided on the upper surface of the lower cover nut. Figure 6 The outer diameter of the annular boss 171 is similar to the inner diameter of the inner sleeve 2 and can be inserted into the inner sleeve 2, which is conducive to the fit between the lower cover nut and the inner sleeve 2. At the same time, the part that extends into the inner sleeve 2 does not occupy the space between the lower edge of the inner sleeve 2 and the base plate 4, and the increased internal thread section of the lower cover nut is conducive to the tightening of the lower cover nut.

[0058] The work process is as follows:

[0059] Insert the screw 12, with the handle 11 installed and the screw thread assembly and cap 15 inserted, into the shaft hole of the double-layer bushing, exposing the bottom of the screw 12. Screw the lower cover nut into the bottom of the screw 12 and tighten it. Pull the screw 12 upward so that the lower cover nut fits against the lower edge of the inner sleeve 2. Rotate the screw thread nut 13 so that the screw thread nut 13 presses the cap 15 against the outer sleeve 1 through the first washer 14. Continue to rotate the screw thread nut 13 so that the screw thread nut 13 moves downward relative to the screw 12. Due to the obstruction of the cap 15, the horizontal position of the screw thread nut 13 does not change, but the screw 12 moves upward relative to the screw thread nut 13, pulling up the inner sleeve 2 that is abutting against the lower cover nut, thereby pulling the inner sleeve 2 out of the outer sleeve 1 to complete the disassembly. During disassembly, the screw 12 can also be rotated using the handle 11 to move it upward relative to the nut 13. However, this method, because it is the screw 12 that is rotating, can easily cause the lower cover assembly 17 above it to move downward relative to the screw, thus releasing the tightening of the lower cover nut. Therefore, the operator can determine when to use the handle 11 to rotate the screw 12 based on the specific situation. For example, when the inner sleeve 2 is about to detach or has mostly detached from the outer sleeve 1, using the handle 11 to rotate the screw 12 can more conveniently and quickly achieve the upward movement of the screw 12, without causing the lower cover nut to loosen or even detach from the screw 12. For the rotation of the nut 13, a wrench or direct hand rotation can be used.

[0060] Example 2

[0061] Figure 7-9 This embodiment illustrates a tool for removing the inner sleeve from a double-layer bushing. Its lower cover assembly 17 includes a lower cover nut 172 and a second washer 173. The outer diameter of the second washer 173 is larger than the inner diameter of the inner sleeve 2 but smaller than the inner diameter of the cap 15, and also smaller than the bottom opening 152. The outer diameter of the lower cover nut 172 is not larger than the outer diameter of the second washer 173. During operation, the second washer 173 is positioned between the lower cover nut 172 and the inner sleeve 2 so that the lower cover assembly 17 can fit tightly against the inner sleeve 2. Both the lower cover nut 172 and the nut 13 are hexagonal nuts, facilitating wrench operation. The rest is the same as in Embodiment 1.

[0062] Example 3

[0063] In this embodiment, the observation holes are multiple holes arranged along the axial direction of the cap. The rest is the same as in Embodiment 1.

[0064] Example 4

[0065] In this embodiment, the outer diameter of the nut is smaller than the top opening, but because the outer diameter of the first washer is larger than the top opening, and the outer diameter of the nut is larger than the inner diameter of the first washer, the nut will not fall into the cap when the disassembly is completed. The rest is the same as in Embodiment 1.

[0066] Example 5

[0067] In this embodiment, the screw includes a first threaded section and a second threaded section; the first threaded section is closer to the bottom of the screw than the second threaded section and is used for tightening and fixing the lower cover assembly; the second threaded section is used for threaded engagement with the nut. The rest is the same as in Embodiment 1.

[0068] Example 6

[0069] In this embodiment, the handle and the screw are integrally formed. The rest is the same as in Embodiment 1.

[0070] Example 7

[0071] In this embodiment, the handle and screw are L-shaped or T-shaped, and the longer the handle, the easier it is to turn the screw. The rest is the same as in Embodiment 1.

[0072] The tool provided by this utility model is not limited to disassembling the bushing of the diatomaceous earth can. The tool includes multiple components, such as the cap, screw, nut, first washer, lower cover nut, and second washer, all of which can be separated from each other. When disassembly is required, specific caps (available in various specifications and sizes to fit against the outer sleeve and allow the inner sleeve to enter), screws (with different length specifications, etc.) can be selected as needed.

[0073] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0074] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A tool for removing the inner sleeve from a double-layer bushing, characterized in that, It includes a lead screw, a sleeve cap, and a lower cover assembly; the lead screw includes a lead nut assembly and a screw rod; the lead nut assembly includes a lead nut that is threaded into the screw rod; the screw rod can pass through the inner sleeve and the outer sleeve of the double-layer bushing; The cap has a top opening and a bottom opening, respectively, through which the screw can pass; the top opening is smaller than the outer diameter of the nut assembly; the bottom opening is larger than the outer diameter of the inner sleeve and smaller than the outer sleeve, so that the inner sleeve can enter the cap. The lower cover assembly includes a lower cover nut; the internal thread of the lower cover nut can be engaged with the external thread of the screw, so that the lower cover nut can be screwed onto the screw; the outer diameter of the lower cover assembly is larger than the inner diameter of the inner sleeve, smaller than the inner diameter of the outer sleeve, and smaller than the bottom opening.

2. The tool as described in claim 1, characterized in that, The axial length of the section on the screw that engages with the threaded section of the nut is not less than the axial length of the inner sleeve; the axial length of the cap is not less than the axial length of the inner sleeve, so that the inner sleeve can be completely fitted into the cap.

3. The tool as described in claim 2, characterized in that, On the screw, the distance from the top of the section that mates with the nut to the locking position of the lower cover nut is not less than the sum of the axial length of the inner sleeve and the axial length of the cap.

4. The tool as described in claim 1, characterized in that, An observation hole is provided on the side wall of the cap.

5. The tool as described in claim 1, characterized in that, The nut assembly further includes a first washer that can be inserted onto the screw, for padding between the cap and the nut; the outer diameter of the first washer is larger than the inner diameter of the nut and the top opening.

6. The tool as described in claim 1, characterized in that, The upper surface of the lower cover nut is provided with an annular boss; the outer diameter of the annular boss is smaller than the inner diameter of the inner sleeve, or is equivalent to the inner diameter of the inner sleeve and can be inserted into the inner sleeve; the outer diameter of the lower cover nut is larger than the inner diameter of the inner sleeve.

7. The tool as claimed in claim 1, characterized in that, The lower cover assembly further includes a second gasket; the outer diameter of the second gasket is larger than the inner diameter of the inner sleeve; the second gasket is used to be disposed between the lower cover nut and the inner sleeve so that the lower cover assembly can fit tightly with the inner sleeve.

8. The tool as claimed in claim 1, characterized in that, The screw includes a first threaded section and a second threaded section; the first threaded section is closer to the bottom of the screw than the second threaded section and is used for tightening and fixing the lower cover assembly; the second threaded section is used for threaded engagement with the nut.

9. The tool as claimed in claim 1, characterized in that, It also includes a handle; the handle is located on the top of the screw; the outer contour of the nut mates with the contact surface of the wrench.

10. The tool as described in any one of claims 1-9, characterized in that, This is a tool for disassembling the bushing of a diatomaceous earth container, and the lower cover nut is configured such that when it is tightened onto the screw and abuts against the lower edge of the inner sleeve, the axial distance from the bottom of the screw to the lower edge of the inner sleeve is not greater than the distance from the lower edge of the inner sleeve to the vertical surface of the double-layer bushing.

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