Fixing device
By designing a fixing device, the problems of pulley circumferential surface damage and cumbersome procedures caused by existing bearing disassembly methods are solved. A simplified fixing device is provided, which realizes the stability and quick disassembly of pulley through the placement platform and hole structure.
Patent Information
- Application Number
- CN202421752784.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-23
- Publication Date
- 2026-03-03
- Estimated Expiration
- 2034-07-23
AI Technical Summary
Existing bearing disassembly methods can easily damage the pulley's circumferential surface and are cumbersome, time-consuming, and labor-intensive.
Design a fixing device including a placement platform, a first hole and a second hole. The first hole is fixed to the circumferential surface of the pulley through contact, and the second hole is used to accommodate the bearing, which simplifies the disassembly process and prevents stress concentration.
It achieves secure fixation of the pulley circumference without damage, simplifies the disassembly process and improves efficiency, saving time, effort and money.
Smart Images
Figure CN223961153U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of bearing disassembly technology, and in particular to a fixing device. Background Technology
[0002] Cigarette rolling machines are commonly used equipment in cigarette production, consisting of a tobacco-spraying roller, a suction chamber, and a cigarette gun. The suction chamber, located between the tobacco-spraying roller and the cigarette gun, includes a suction belt and a pulley that supports and drives the suction belt. The suction chamber draws in tobacco shreds delivered by the tobacco-spraying roller and bottom-blowing airflow, and then conveys the tobacco through the suction belt to the cigarette gun. The pulley has mounting holes containing two bearings and retaining rings. The retaining rings are positioned between the end faces of the two bearings to limit their movement. Because the pulley is constantly exposed to negative pressure and tobacco dust, a large amount of dust accumulates inside the bearings, leading to lubrication failure and dry friction, ultimately causing bearing damage.
[0003] Damaged bearings need to be disassembled to facilitate the installation of new bearings. Generally, when disassembling a bearing, a bench vise is used to clamp and secure the pulley; that is, the two clamping surfaces of the bench vise are used to grip the pulley. Then, a flathead screwdriver is aimed at one of the bearings, and then a hammer or other tool is used to tap the screwdriver to dislodge the bearing from the pulley. The bench vise is then released, the pulley is flipped over, and clamped again. The same flathead screwdriver is then aimed at the other bearing, and a hammer is used to tap it to remove the other bearing from the pulley. Finally, the bench vise is released, and the pulley is removed.
[0004] Existing bearing disassembly methods have several problems. First, because the clamping surface of the bench vise is flat while the outer circumference of the pulley is curved, the contact between the bench vise and the pulley is line contact rather than surface contact. This causes stress concentration, which can damage the pulley surface and affect the normal operation of the pulley conveyor belt. Second, the disassembly process requires repeatedly opening and closing the bench vise to clamp and release the pulley, making the disassembly steps cumbersome, time-consuming, and labor-intensive. Utility Model Content
[0005] The purpose of this invention is to solve the problems of existing bearing disassembly methods, which easily lead to damage to the circumferential surface of the pulley and are cumbersome, time-consuming, and labor-intensive. This invention provides a fixing device that can fix the pulley when replacing the bearing without damaging the circumferential surface of the pulley, while simplifying the fixing steps and improving disassembly efficiency.
[0006] To solve the above-mentioned technical problems, the present invention discloses a fixing device for fixing a pulley, wherein the pulley is provided with at least one bearing, and the fixing device includes:
[0007] Placement platform;
[0008] The first hole is located on the upper surface of the placement platform, and the diameter of the first hole is greater than or equal to the outer diameter of the pulley;
[0009] The second hole is located below the first hole. The first and second holes are connected and pass through the placement platform. The diameter of the first hole is larger than the diameter of the second hole. A stepped surface is provided between the first and second holes for placing the pulley. The diameter of the second hole is greater than or equal to the outer diameter of the bearing and smaller than the outer diameter of the pulley.
[0010] In use, place the pulley in the first hole. At this time, the lower end face of the pulley is in contact with the stepped surface, and the circumferential surface of the pulley is in contact with the inner wall of the first hole. The first hole can restrict the pulley from moving radially, thereby fixing the pulley. Then, use a flathead screwdriver to aim at one of the bearings and use a hammer or other tools to tap the flathead screwdriver so that the bearing is disengaged from the pulley and falls into the second hole, thus completing the disassembly of the bearing.
[0011] By adopting the above technical solution, the contact area between the device and the circumferential surface of the pulley can be increased when fixing the pulley, thus preventing stress concentration that could damage the circumferential surface of the pulley. Furthermore, when the pulley contains two bearings, after one bearing is removed, the pulley can be quickly removed from the first hole, rotated 180°, and reinserted. Then, the other bearing can be quickly removed by tapping it with a flathead screwdriver and hammer. Therefore, the fixing device provided in this application has a simple fixing method, eliminating the need for multiple tightening and loosening steps with a bench vise, saving time and effort.
[0012] Optionally, the axes of the first and second holes coincide.
[0013] Optionally, the depth of the second hole is greater than or equal to the height of the bearing.
[0014] Optionally, the difference between the diameter of the first hole and the outer diameter of the pulley is 0.1 mm to 1 mm.
[0015] Optionally, the difference between the diameter of the first hole and the outer diameter of the pulley is 1 mm.
[0016] Optionally, the difference between the diameter of the second bore and the outer diameter of the bearing is at least 1 mm.
[0017] Optionally, the difference between the diameter of the second bore and the outer diameter of the bearing is 4 mm.
[0018] Optionally, the depth of the first hole is less than or equal to the height of the pulley.
[0019] Optionally, the placement platform is made of high-quality carbon structural steel.
[0020] Optionally, the placement platform is made of 45# steel. Attached Figure Description
[0021] Figure 1 This diagram shows a structural schematic of the fixing device in an embodiment of the present invention;
[0022] Figure 2 Show Figure 1 Top view;
[0023] Figure 3 A cross-sectional view of the fixing device in use is shown in an embodiment of this utility model.
[0024] Reference numerals in the attached drawings: 1. Placement platform, 2. First hole, 3. Second hole, 4. Step surface, 5. Pulley, 6. Bearing. Detailed Implementation
[0025] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. Although the description of this utility model will be presented in conjunction with preferred embodiments, this does not mean that the features of this utility model are limited to this embodiment. On the contrary, the purpose of describing the utility model in conjunction with the embodiments is to cover other options or modifications that may be derived based on the claims of this utility model. To provide a deep understanding of this utility model, many specific details will be included in the following description. This utility model may also be implemented without using these details. Furthermore, to avoid confusion or obscuring the focus of this utility model, some specific details will be omitted in the description. It should be noted that, without conflict, the embodiments and features in the embodiments of this utility model can be combined with each other.
[0026] It should be noted that in this specification, similar reference numerals and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.
[0027] In the description of this embodiment, it should be noted that the terms "upper", "lower", "inner", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the utility model product is usually placed in during use. They are only for the convenience of describing the 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 the utility model.
[0028] The terms “first”, “second”, etc., are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.
[0029] In the description of this embodiment, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a connectable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment based on the specific circumstances.
[0030] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.
[0031] like Figures 1 to 3 As shown, this utility model discloses a fixing device for fixing a pulley 5. The pulley 5 has two bearings 6, which are fixed to the pulley 5 by snap rings. The fixing device includes a placement platform 1, a first hole 2, and a second hole 3. The first hole 2 is located on the upper surface of the placement platform 1, and the diameter of the first hole 2 (e.g., ...) is... Figure 2 The outer diameter of the pulley 5 (as shown in dimension D1) is greater than or equal to the outer diameter of the pulley 5 to ensure that the pulley 5 can be placed inside the first hole 2. The second hole 3 is located below the first hole 2, and the axes of the second hole 3 and the first hole 2 coincide. The second hole 3 and the first hole 2 are connected and penetrate the upper and lower surfaces of the placement platform 1. The diameter of the first hole 2 is greater than the diameter of the second hole 3 (e.g., as shown in dimension D1). Figure 2 (As shown in dimension D2). A stepped surface 4 is provided between the first hole 2 and the second hole 3. The stepped surface 4 is a plane and is used to support the pulley 5 placed inside the first hole 2. Figure 3 As shown, when the pulley 5 is placed into the first hole 2, the projection of the bearing 6 falls completely within the projection range of the second hole 3 along the axial direction of the first hole 2. The diameter of the second hole 3 is greater than or equal to the outer diameter of the bearing 6 and less than the outer diameter of the pulley 5, so that the removed bearing 6 can pass through the second hole 3, while the pulley 5 cannot pass through the second hole 3.
[0032] In use, place the fixing device on the workbench, with the lower surface of the placement platform 1 in contact with the workbench. Then, place the pulley 5 into the first hole 2 located above. At this time, the lower end face of the pulley 5 is in contact with the stepped surface 4, and the circumferential surface of the pulley 5 is in contact with the inner wall of the first hole 2. The first hole 2 can restrict the radial movement of the pulley 5, thereby clamping and fixing the pulley 5. Then, use a flathead screwdriver to aim at the bearing 6 located below, and use a hammer or other tools to tap the flathead screwdriver to make the bearing 6 detach from the pulley 5 and fall into the second hole 3, thus completing the disassembly of the bearing 6.
[0033] By adopting the above technical solution and using the fixing device provided in this application to fix the pulley 5, the contact area between the device and the circumferential surface of the pulley 5 can be increased, thus preventing stress concentration that could damage the circumferential surface of the pulley 5. At the same time, after one bearing 6 is disassembled, the pulley 5 only needs to be removed from the first hole 2, rotated 180° and put back into the first hole 2, and then tapped again with a flathead screwdriver and hammer to quickly disassemble the other bearing 6. Therefore, the fixing device provided in this application has a simple fixing method, eliminating the need for multiple tightening and loosening steps of the bench vise, saving time and effort.
[0034] Optionally, such as Figure 3 As shown, the depth of the second hole 3 (e.g.) Figure 2 The height of bearing 6 (as shown in the middle dimension L2) is greater than or equal to the height of bearing 6. For example, the height of bearing 6 is 8 mm, and the depth of the second hole 3 is 18 mm.
[0035] Using the above technical solution, if the depth of the second hole 3 is less than the height of the bearing 6, when part of the bearing 6 falls into the second hole 3, the other part of the bearing 6 will still be inside the pulley 5 and cannot be detached from the pulley 5, thus causing incomplete disassembly. However, by setting the depth of the second hole 3 to be greater than or equal to the height of the bearing 6, the bearing 6 can fall completely into the second hole 3, facilitating the complete detachment of the bearing 6 from the pulley 5.
[0036] Optionally, the difference between the diameter of the first hole 2 and the outer diameter of the pulley 5 is 0.1 mm to 1 mm. Preferably, the difference between the diameter of the first hole 2 and the outer diameter of the pulley 5 is 1 mm. For example, the outer diameter of the pulley 5 is 68 mm, and the diameter of the first hole 2 is 69 mm. This ensures that the pulley 5 can be inserted into the first hole 2, while also enabling the first hole 2 to limit and fix the pulley 5.
[0037] Optionally, the difference between the diameter of the second hole 3 and the outer diameter of the bearing 6 is at least 1 mm. Preferably, the difference between the diameter of the second hole 3 and the outer diameter of the bearing 6 is 4 mm. For example, the outer diameter of the bearing 6 is 28 mm and the diameter of the second hole 3 is 32 mm, which allows the bearing 6 to pass through the second hole 3 more smoothly and also facilitates the subsequent removal of the bearing 6 from the second hole 3.
[0038] Optionally, such as Figure 3 As shown, the depth of the first hole 2 (e.g.) Figure 2 The height of the pulley 5 is less than or equal to the height of the first hole 2 (as shown in the middle dimension L1), which can both ensure that the first hole 2 limits the pulley 5 and facilitate the removal of the pulley 5 from the first hole 2.
[0039] Optionally, the placement platform 1 is made of high-quality carbon structural steel. Specifically, the placement platform 1 is made of 45# steel. Because 45# steel has higher structural strength and resistance to deformation, using 45# steel can improve the service life of the placement platform 1.
[0040] Although the present invention has been illustrated and described with reference to certain preferred embodiments, those skilled in the art should understand that the above description is a further detailed explanation of the present invention in conjunction with specific embodiments, and should not be construed as limiting the specific implementation of the present invention to these descriptions. Those skilled in the art can make various changes in form and detail, including some simple deductions or substitutions, without departing from the spirit and scope of the present invention.
Claims
1. A fixing device for fixing a pulley wheel, said pulley wheel being provided with at least one bearing, characterized in that, The fixing device comprises: a placement table; a first hole body provided on an upper surface of the placement table, a diameter of the first hole body being greater than or equal to an outer diameter of the pulley; a second hole body provided below the first hole body, the first hole body and the second hole body being in communication and penetrating through the placement table, the diameter of the first hole body being greater than the diameter of the second hole body, a stepped surface being provided between the first hole body and the second hole body, the stepped surface being used for placing the pulley, the diameter of the second hole body being greater than or equal to an outer diameter of the bearing and less than the outer diameter of the pulley.
2. The fixture of claim 1, wherein The axis of the first hole body and the second hole body coincide.
3. The fixture of claim 1, wherein The depth of the second hole body is greater than or equal to the height of the bearing.
4. The fixture of claim 1, wherein The difference between the diameter of the first hole body and the outer diameter of the pulley is 0.1mm to 1mm.
5. The fixture of claim 4, wherein The difference between the diameter of the first hole body and the outer diameter of the pulley is 1mm.
6. The fixture of claim 1, wherein The difference between the diameter of the second hole body and the outer diameter of the bearing is at least 1mm.
7. The fixture of claim 6, wherein The difference between the diameter of the second hole body and the outer diameter of the bearing is 4mm.
8. The fixture of any one of claims 1 to 7, wherein, The depth of the first hole body is less than or equal to the height of the pulley.
9. The fixture of any one of claims 1 to 7, wherein, The placement table is made of high-quality carbon structural steel.
10. The fixture of claim 9, wherein, The placement table is made of 45# steel.