A low noise running oil-impregnated bearing storage device

Abstract

The utility model relates to the technical field of precision machinery spare storage, provide a kind of low noise operation oil bearing storage device, including box, lid and the placement plate of multilayer stacking placement in the inside of box, the boss is integrally formed in the top edge of box, the outer wall of boss is equipped with sealing ring, the groove of being opposite and groove type is adapted to the boss position is established in the bottom of lid, sealing ring is extruded and fitted between the outer wall of boss and the inner wall of groove when lid is closed, combination groove is established in the top of placement plate around, combination column is fixedly connected in the bottom of placement plate around, the combination column of placement plate in upper layer is vertically slidably connected in the combination groove of placement plate in lower layer. The utility model is extruded and fitted between the outer wall of boss and the inner wall of groove by sealing ring cooperation to prevent lubricating oil volatilization, and it is prevented from self-lubricating bearing pressure deformation by using combination column support to realize suspension stacking, to guarantee the low noise operation performance of self-lubricating bearing.

Description

Technical Field

[0001] This utility model relates to the field of logistics storage and protection technology for precision mechanical parts, and in particular to a low-noise oil-impregnated bearing storage device. Background Technology

[0002] As a key supporting component in various precision motors, cooling fans, and household appliances, the quiet operation of oil-impregnated bearings is an important indicator of product quality. The reason why oil-impregnated bearings can achieve low-noise operation is mainly due to the high oil content impregnated in their porous matrix and the extremely precise internal hole geometry. During operation, a stable lubricating oil film is formed between the shaft and the hole by centrifugal force and thermal effect, thereby avoiding dry friction and eliminating noise.

[0003] In the current production, turnover, and storage process of oil-impregnated bearings, common plastic turnover boxes and cardboard boxes are used for simple stacking and storage. This traditional storage method is not specifically designed for the characteristics of oil-impregnated bearings, such as oil loss and susceptibility to compression. On the one hand, ordinary storage boxes lack an effective airtight sealing structure, and there is a large physical gap between the box cover and the box body. This causes the internal lubricating oil to evaporate and be lost during long-term storage of the bearings, and external dust can penetrate and adhere to the bearing surface. Once the lubricating oil decreases and impurities enter, the bearings will produce a harsh noise due to insufficient lubrication and particle wear during subsequent use.

[0004] The existing storage device lacks an independent load-bearing and positioning system. In order to save space, bearings are directly stacked and shallow trays containing bearings are directly pressed down layer by layer. The weight of the upper layer is entirely borne by the bearings and shallow trays of the lower layer. This kind of stress will cause the oil-impregnated bearings at the bottom layer to be subjected to continuous mechanical compression and undergo slight plastic deformation. Oil-impregnated bearings have extremely high requirements for dimensional and positional tolerances such as cylindricity. Even a small deformation will destroy the fit clearance between the bearing and the shaft, resulting in unstable operation and large vibration after installation. Ultimately, the bearing loses its proper low-noise operating characteristics.

[0005] Therefore, this utility model proposes a low-noise oil-impregnated bearing storage device to overcome the shortcomings of the prior art. Utility Model Content

[0006] In view of the problems in the existing oil-impregnated bearing storage devices, such as poor sealing performance leading to lubricant evaporation and lack of independent internal support structure causing bearing deformation under pressure during stacking and transportation, thus affecting low-noise operation performance, this utility model aims to provide a low-noise oil-impregnated bearing storage device with an improved structure that can effectively solve the above problems.

[0007] This utility model provides a low-noise operating oil-impregnated bearing storage device, comprising: a box, a box cover that fits on the top of the box, and multiple stacked placement plates placed inside the box.

[0008] The box has an integrally formed protrusion on its top edge, and a sealing ring is fitted on the outer wall of the protrusion. The bottom of the box lid has a groove that is opposite to the position of the protrusion and matches its shape. The box lid, the box, and the sealing ring are combined by compression fitting. When the box lid is closed, the protrusion extends into the groove, and the sealing ring is compressed and tightly fitted between the outer wall of the protrusion and the inner wall of the groove.

[0009] Furthermore, the top of the placement plate has a combination groove around its perimeter, and the bottom of the placement plate has a combination column that matches the diameter of the combination groove. The combination column of the upper placement plate is vertically slidably connected to the combination groove of the lower placement plate. The combination column and the combination groove cooperate to restrict the lateral displacement of the placement plate in the box. The top of the placement plate has a placement groove, and a nylon bag is placed inside the placement groove. The nylon bag is used to wrap the self-lubricating bearing.

[0010] Preferably, the rear outer wall of the box and the rear outer wall of the box lid are fixedly connected by a hinge, and both ends of the hinge are fixedly connected to the box and the box lid respectively, so as to realize the flipping and opening action of the box lid relative to the box.

[0011] Preferably, a lock body is fixedly connected to the front outer wall of the box, and a latch corresponding to the position of the lock body is fixedly connected to the front outer wall of the box lid. The latch engages with the lock body to close and lock the box and the box lid, and the sealing ring is further tightened by the locking force.

[0012] Preferably, a handle is fixedly connected to the top of the lid to provide a convenient lifting and support point.

[0013] Preferably, the nylon bag contains a self-lubricating bearing, the inner diameter of the placement groove is adapted to the outer diameter of the nylon bag after containing the self-lubricating bearing, and the nylon bag is made of PA and PE composite material, utilizing the layered structure of the composite material to improve the anti-permeability and tensile strength.

[0014] Preferably, the self-lubricating bearing has a contact section in the middle section inside, which is used to contact an external rotating shaft to achieve a support function.

[0015] Preferably, the self-lubricating bearing has a return groove inside, and the two ends of the return groove respectively penetrate the two ends of the self-lubricating bearing shaft hole and the side wall of the contact section, for guiding the thrown-out lubricating oil back.

[0016] Preferably, the diameter of the return groove gradually decreases from both ends of the self-lubricating bearing shaft hole toward the contact section, and the guiding effect generated by the change in diameter helps the lubricating oil to accumulate in the contact section.

[0017] Preferably, the two ends of the self-lubricating bearing shaft hole and the outer wall surface of the self-lubricating bearing adopt an arc transition to optimize the end contact form.

[0018] This utility model has the following beneficial effects: 1. This utility model solves the problem in the prior art where poor sealing of the storage device leads to the evaporation of lubricating oil inside the oil-impregnated bearing due to external dust and moisture contamination. It achieves excellent sealing and protection effect, ensuring the oil content and cleanliness of the bearing during storage.

[0019] 2. This utility model achieves longitudinal vertical suspended stacking of multi-layer placement plates by setting mutually cooperating combination columns and combination grooves around the placement plate. This solves the problems of pressure deformation of the bottom precision bearings and low space utilization caused by direct stacking in the prior art. It achieves the effect of significantly increasing the quantity of single storage and transportation while effectively protecting the lower bearings from compression damage through an independent bearing mechanism.

[0020] 3. This utility model solves the problem of mechanical damage to the bearing surface and leakage of lubricating oil caused by displacement and collision of the bearing due to shaking during storage and transportation by using a nylon bag made of PA and PE composite material and placing the nylon bag in a placement groove with a suitable inner diameter. It achieves the dual protection of flexible buffer positioning and oil penetration prevention. Attached Figure Description

[0021] Figure 1 This is a perspective view of a low-noise oil-impregnated bearing storage device proposed in this utility model; Figure 2 This is a cross-sectional view of the housing structure in a low-noise oil-impregnated bearing storage device proposed in this utility model; Figure 3 This is an exploded view of the housing structure in a low-noise oil-impregnated bearing storage device proposed in this utility model; Figure 4 This is a cross-sectional view of the protective structure in a low-noise oil-impregnated bearing storage device proposed in this utility model; Figure 5 This is an exploded view of the protective structure in a low-noise oil-impregnated bearing storage device proposed in this utility model.

[0022] Legend: 1. Box; 2. Protrusion; 3. Hinge; 4. Lock body; 5. Box lid; 6. Handle; 7. Lock; 8. Groove; 9. Sealing ring; 10. Placement plate; 11. Combination groove; 12. Combination column; 13. Placement groove; 14. Nylon bag; 15. Self-lubricating bearing; 16. Contact section; 17. Return groove. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the protection scope of this utility model. Example

[0024] Please refer to Figures 1 to 5 This utility model provides a low-noise operating oil-impregnated bearing storage device, which aims to solve the problems in the prior art where poor sealing performance of oil-impregnated bearing storage devices leads to lubricant evaporation and the lack of independent internal support structure causes bearings to be deformed under pressure during stacking and transportation, thus affecting low-noise operating performance.

[0025] like Figures 1 to 3 As shown, a low-noise oil-impregnated bearing storage device includes a box 1 and a box cover 5 covering the top of the box 1. The box 1 serves as the main load-bearing component of the device. Inside the box 1, multiple layers of vertically stacked placement plates 10 are arranged to support precision parts to be stored. A protrusion 2 is integrally formed on the top edge of the box 1. The protrusion 2 is distributed in a continuous closed loop along the edge of the opening of the box 1. A sealing ring 9 is fitted on the outer wall of the protrusion 2. The bottom of the box cover 5 has a groove 8 that is opposite in position and matched in shape to the protrusion 2. When the box cover 5 is closed, the protrusion 2 extends into the groove 8. The closing pressure between the box cover 5 and the box 1 causes the sealing ring 9 to be squeezed and tightly fitted between the outer wall of the protrusion 2 and the inner wall of the groove 8. The elastic deformation of the sealing ring 9 after being compressed fills the assembly gap between the protrusion 2 and the groove 8, thereby creating an airtight protective environment inside the box 1, effectively blocking external moisture and dust from entering and preventing internal oil and gas leakage.

[0026] The top of the placement plate 10 has a combination groove 11 around its four sides, and the bottom of the placement plate 10 has a combination column 12 that matches the diameter of the combination groove 11. The combination column 12 at the bottom of the upper placement plate 10 is vertically slidably connected to the combination groove 11 at the top of the lower placement plate 10. The combination column 12 and the combination groove 11 are inserted and engaged to restrict the lateral displacement of the placement plate 10 inside the box 1. The rigid support of the combination column 12 makes the two adjacent layers of placement plates 10 form a fixed-distance suspended stacking structure, ensuring that the weight of the upper placement plate 10 is not directly transferred to the surface of the lower stored items. The top of the placement plate 10 has a placement groove 13, and a nylon bag 14 is placed inside the placement groove 13. The nylon bag 14 is used to wrap the self-lubricating bearing 15. The inner diameter of the placement groove 13 is adapted to the outer diameter of the nylon bag 14 after wrapping the self-lubricating bearing 15. The placement groove 13 limits the bottom of the nylon bag 14 to prevent the self-lubricating bearing 15 from rolling and colliding in the horizontal direction.

[0027] Please refer to Figure 1 and Figure 2 To maintain a sealed environment inside the box and facilitate handling due to gravity, a low-noise oil-impregnated bearing storage device also includes an auxiliary connecting component disposed on the outer surface of the box. The rear outer wall of the box 1 and the rear outer wall of the cover 5 are fixedly connected by two hinges 3. The two hinges 3 are spaced apart along the length of the box to provide balanced support. The two ends of the hinges 3 are fixed to the rear surfaces of the box 1 and the cover 5 respectively by fasteners. The cover 5 is flipped relative to the box 1 by the engagement of the hinge pins. A handle 6 is fixedly connected to the geometric center of the top plane of the cover 5. The handle 6 is fixed to the cover 5 by welding. The handle 6 is used to bear the entire weight of the box and the internal load during handling.

[0028] Please refer to Figure 1Two lock bodies 4 are fixedly connected to the front outer wall of the box 1. Each lock body 4 has an internal cavity for locking. Two latches 7 are fixedly connected to the front outer wall of the lid 5, precisely corresponding to the positions of the lock bodies 4. The ends of the latches 7 extend with hook-like structures for engaging. When the lid 5 is closed, the latches 7 swing downwards and engage with the internal cavities of the lock bodies 4 to achieve mechanical locking. This engagement of the latches 7 and lock bodies 4 forms a rigid connection that resists vibration. The locking force generated by this connection acts directly on the contact surface between the lid 5 and the box 1, forcing the sealing ring 9 located between the contact surfaces to undergo elastic compression deformation, thereby eliminating the locking mechanism of the lid 5. The physical gap between the box 1 and the container ensures that external air and moisture cannot penetrate into the box through the seams. In addition, the nylon bag 14 inside the placement slot 13 is made of a composite film material of PA polyamide and PE polyethylene. The composite material combines the wear resistance of the PA layer with the excellent chemical inertness of the PE layer. The nylon bag 14 not only acts as a physical barrier to isolate dust, but its soft material properties also provide cushioning protection for the self-lubricating bearing 15 in the placement slot 13, preventing surface scratches caused by hard contact. Together with the limiting function of the placement slot 13, a hardware and software combined protection system is constructed for the self-lubricating bearing 15.

[0029] Please refer to Figure 4 and Figure 5 As a core precision component that is the focus of protection in this device, the self-lubricating bearing 15 is completely encapsulated inside the nylon bag 14. The self-lubricating bearing 15 is made of porous metal material that is soaked in lubricating oil. A contact section 16 for mating with the rotating shaft is opened at the axial center position inside the self-lubricating bearing 15. The inner wall surface of the contact section 16 is precision machined to ensure that an ideal friction pair is formed with the rotating shaft. The contact section 16 is located in the middle section of the axial length of the self-lubricating bearing 15. A certain distance of non-contact cavity area is reserved between the openings at both ends of the self-lubricating bearing 15 and the contact section 16.

[0030] In order to achieve automatic recovery and recycling of lubricating oil during the high-speed rotation of the self-lubricating bearing 15, a return groove 17 is provided inside the base of the self-lubricating bearing 15. The return groove 17 is spatially distributed inside the wall thickness of the self-lubricating bearing 15. The two ends of the return groove 17 physically connect the two end faces of the shaft hole of the self-lubricating bearing 15 and the side wall surface of the contact section 16, respectively. The return groove 17 forms an oil passage connecting the bearing end and the bearing area. The cross-sectional aperture of the return groove 17 is not uniform. The aperture of the return groove 17 gradually decreases from the two ends of the shaft hole of the self-lubricating bearing 15 towards the contact section 16 in a tapered and funnel-shaped structure. This structural difference is used to construct a fluid guiding mechanism inside the return groove 17.

[0031] In addition, the external contour structure of the self-lubricating bearing 15 has also been optimized for noise reduction. The end faces of the two ends of the shaft hole of the self-lubricating bearing 15 and the outer cylindrical side wall of the self-lubricating bearing 15 do not intersect directly, but are connected by a smooth arc transition structure. The arc transition structure changes the contact geometry between the end of the self-lubricating bearing 15 and the limiting component of the outer end cover, changing the original large-area surface-to-surface contact to a line-to-surface contact with a smaller contact area. By reducing the effective friction area, the mechanical noise during operation is reduced and the wear of the end material is reduced.

[0032] Working principle: During storage, the operator first puts the self-lubricating bearing 15 to be stored into the nylon bag 14. The PA and PE composite material of the nylon bag 14 has a layered structure that prevents the lubricating oil from seeping out of the surface of the self-lubricating bearing 15. Then, the nylon bag 14 containing the self-lubricating bearing 15 is placed in the placement groove 13 opened at the top of the placement plate 10. The inner diameter of the placement groove 13 and the outer diameter of the nylon bag 14 after loading are kept in an interference fit and a tight fit. The side wall of the placement groove 13 applies a circumferential constraint force to the nylon bag 14, thereby firmly fixing the nylon bag 14 and the internal self-lubricating bearing 15 in a specific position on the placement plate 10. This not only prevents inertial displacement during transportation, but also buffers external vibration energy through the flexible material of the nylon bag 14, avoiding structural damage and noise performance degradation caused by hard collision between the self-lubricating bearing 15 and the placement plate 10. After loading a single placement plate 10, a multi-layer stacking operation is performed. The combination column 12 at the bottom of the upper layer placement plate 10 is aligned with the combination groove 11 at the top of the lower layer placement plate 10, so that the combination column 12 is vertically inserted into the combination groove 11 and slides axially until it is in place. Through the interlocking of multiple sets of combination columns 12 and combination grooves 11, a stable vertical stacking system is built inside the box 1. At this time, the combination column 12 acts as the main load-bearing component to support the interlayer spacing, ensuring that a safe gap is maintained between the bottom surface of the upper layer placement plate 10 and the nylon bag 14 protruding in the lower layer placement groove 13. From a physical perspective, the potential deformation risk caused by interlayer compression to the lower self-lubricating bearing 15 is completely eliminated. Then, the stacked placement plates 10 are placed into the internal space of the box 1. The inner wall of the box 1 is used to limit the range of motion of the edges of the placement plates 10, thereby maximizing the use of the internal volume of the box 1 to improve the efficiency of single storage and transportation. After the placement plate 10 is filled, hold the handle 6 on the top of the box cover 5 and rotate the box cover 5 around the hinge 3 on the back of the box 1 to perform the closing action. As the box cover 5 flips down, the groove 8 at the bottom of the box cover 5 gradually approaches and finally covers the protrusion 2 on the top of the box 1. During this process, the sealing ring 9 fitted on the outer wall of the protrusion 2 is subjected to bidirectional compression by the inner wall of the groove 8 and the outer wall of the protrusion 2. At the same time, the operator moves the latch 7 on the front side of the box cover 5 and inserts it into the lock body 4 on the front side of the box 1. The mechanical locking force of the lock body 4 and the latch 7 further presses the mating surface of the box cover 5 and the box 1, forcing the sealing ring 9 to undergo elastic deformation and fill the gap between the protrusion 2 and the groove 8, thereby forming an airtight barrier. The barrier can effectively isolate dust particles and moisture in the external environment from entering the interior of the box 1, prevent the self-lubricating bearing 15 from rusting due to moisture and dust pollution, and prevent the subsequent operating noise from increasing. It also prevents the oil vapor volatilized inside the self-lubricating bearing 15 from leaking into the external environment. When the self-lubricating bearing 15 is removed and installed in mechanical equipment, it exhibits low-noise operation. Under the high-speed rotation of the shaft, the contact section 16 generates heat through friction with the shaft surface. This causes the lubricating oil within the pores of the self-lubricating bearing 15 to expand due to heat and precipitate onto the contact friction surface under centrifugal force. After the lubricating oil is thrown away from the contact area, it enters the return groove 17 inside the self-lubricating bearing 15. Because the return groove 17 adopts a tapered structure with a gradually decreasing diameter from both ends of the shaft hole towards the contact section 16, in... Driven by the combined effects of centrifugal force and capillary action, the lubricating oil automatically flows back to the contact section 16 along the guide slope of the return groove 17 and re-penetrates into the porous structure of the self-lubricating bearing 15. This self-circulation mechanism significantly reduces the loss of lubricating oil, ensuring continuous oil film lubrication in the contact section 16. Combined with the arc transition structure at both ends of the self-lubricating bearing 15, the contact form between the bearing end and the external component is optimized to line contact, significantly reducing the operating friction resistance and vibration amplitude, thereby achieving stable operation of the self-lubricating bearing 15 with long service life and low noise.

Claims

1. A low-noise operating oil-impregnated bearing storage device, comprising: A box (1), a box lid (5) that covers the top of the box (1), and multiple stacked placement boards (10) placed inside the box (1); Its features are, The top edge of the box (1) is integrally formed with a protrusion (2), and a sealing ring (9) is fitted on the outer wall of the protrusion (2). The bottom of the box cover (5) is provided with a groove (8) that is opposite to the position of the protrusion (2) and matches its shape. When the box cover (5) is closed, the sealing ring (9) fits tightly between the outer wall of the protrusion (2) and the inner wall of the groove (8). The top four sides of the placement plate (10) are provided with a combination groove (11), and the bottom four sides of the placement plate (10) are fixedly connected with a combination column (12) that matches the diameter of the combination groove (11). The combination column (12) of the upper placement plate (10) is vertically slidably connected to the combination groove (11) of the lower placement plate (10). The top of the placement plate (10) is provided with a placement groove (13), and a nylon bag (14) is placed inside the placement groove (13).

2. The low-noise oil-impregnated bearing storage device according to claim 1, characterized in that, The rear outer wall of the box (1) is fixedly connected to the rear outer wall of the lid (5) by two hinges (3), and the two ends of the hinges (3) are fixedly connected to the box (1) and the lid (5) respectively.

3. The low-noise oil-impregnated bearing storage device according to claim 1, characterized in that, Two lock bodies (4) are fixedly connected to the front outer wall of the box (1), and two latches (7) corresponding to the positions of the lock bodies (4) are fixedly connected to the front outer wall of the lid (5). The latches (7) are engaged in the lock bodies (4) to achieve the closing and locking of the box (1) and the lid (5).

4. The low-noise oil-impregnated bearing storage device according to claim 1, characterized in that, A handle (6) is fixedly connected to the top of the lid (5).

5. The low-noise oil-impregnated bearing storage device according to claim 1, characterized in that, The inside of the nylon bag (14) is wrapped with a self-lubricating bearing (15), and the inner diameter of the placement groove (13) is matched with the outer diameter of the nylon bag (14) after wrapping the self-lubricating bearing (15).

6. A low-noise oil-impregnated bearing storage device according to claim 5, characterized in that, The self-lubricating bearing (15) has a contact section (16) in the middle section inside, which is used to contact the external shaft.

7. A low-noise oil-impregnated bearing storage device according to claim 6, characterized in that, A reflux groove (17) is provided inside the self-lubricating bearing (15). The two ends of the reflux groove (17) pass through the two ends of the shaft hole of the self-lubricating bearing (15) and the side wall of the contact section (16), respectively. The diameter of the reflux groove (17) gradually decreases from the two ends of the shaft hole of the self-lubricating bearing (15) toward the contact section (16).

8. A low-noise oil-impregnated bearing storage device according to claim 6, characterized in that, The two ends of the shaft hole of the self-lubricating bearing (15) are connected to the outer wall surface of the self-lubricating bearing (15) by an arc transition.

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