Bearing seat easy to press and composite sealing macromolecule carrier roller
By adding an annular groove and optimizing the sealing structure on the inner side of the annular buckle of the polymer bearing housing, the problem of pipe opening cracking during the press-fitting of the polymer idler roller bearing housing was solved, improving production efficiency and sealing performance, and adapting to harsher working conditions.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-14
- Publication Date
- 2026-03-10
AI Technical Summary
The bearing housings of existing polymer idlers are prone to pipe opening cracking or axial displacement of the bearing housing during the pressing process, which affects production efficiency and causes material waste, especially when flame retardant requirements are required.
An annular groove is added to the inner side of the annular snap-fit of the polymer bearing housing body, and grooves are evenly distributed along the circumference in the radial direction of the annular snap-fit to form a deformation snap-fit, which reduces the deformation during press fitting, and at the same time optimizes the sealing structure to improve sealing performance and noise reduction effect.
It effectively reduces the cracking of the pipe opening during the press-fitting of the bearing housing, improves production efficiency, reduces manufacturing costs, and enhances the waterproof performance and adaptability of the sealed polymer idler roller to harsh working conditions.
Smart Images
Figure CN223983052U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of idler roller manufacturing technology, specifically, it relates to an easy-to-press bearing housing and a composite sealing polymer idler roller. Background Technology
[0002] As polymer idlers gradually enter the conveyor industry market, they are highly favored due to their excellent wear resistance, corrosion resistance, and superior noise reduction effect. The bearing housing, as the most crucial part of the polymer idler design, requires consideration of strength, noise reduction effect, assembly method, and avoidance of stress concentration.
[0003] Currently, most polymer idler rollers use a high-strength steel-plastic composite tube pressed into the bearing housing. The bearing housing and tube are fitted together by interference fit with structural adhesive or barbed snap-fit positioning. However, interference fit relies on the structural adhesive for positioning. When the adhesive fails over time, the bearing housing may shift axially outward, damaging the idler roller. Snap-fit positioning, on the other hand, can lead to pipe cracking or bearing housing damage due to excessive pressure during the pressing process. This is especially problematic when the idler roller requires flame retardancy, as material cracking becomes more frequent, severely impacting production efficiency and resulting in material waste.
[0004] Therefore, it is urgent to improve the existing bearing housings and polymer idlers. Utility Model Content
[0005] The purpose of this utility model is to overcome the above-mentioned shortcomings and propose an easy-to-press bearing housing and a composite sealing polymer idler roller.
[0006] Based on one of the above objectives, the technical solution proposed by this utility model is as follows:
[0007] An easy-to-install bearing housing includes a polymer bearing housing body, a bearing cavity is provided inside the polymer bearing housing body, a shaft hole is provided on the inner side of the bearing cavity, an outwardly protruding annular buckle is provided on the outer surface of the end of the polymer bearing housing body away from the shaft hole, an annular groove is provided on the inner side of the annular buckle, and at least two slots are evenly distributed along the circumferential direction on the annular buckle, and the slots are connected to the annular groove.
[0008] This solution adds an annular groove to the inner side of the annular snap fastener of the polymer bearing housing body, and adds grooves evenly distributed along the circumference in the radial direction of the annular snap fastener. This can form a deformation snap fastener on the outermost ring of the polymer bearing housing body, so that the composite sealing polymer idler roller can share the deformation of the pipe opening caused by pressing into the annular snap fastener of the polymer bearing housing body during the pressing process, thus reducing the pipe opening cracking that occurs in the bearing housing pressing process.
[0009] Preferably, the shaft hole end of the polymer bearing housing body is provided with a plurality of noise-reducing holes evenly distributed circumferentially, and the opening shape of the noise-reducing holes is trapezoidal. This arrangement has the effects of weight reduction, vibration damping and noise reduction.
[0010] Preferably, the number of slots is four, which helps to balance the uniformity of deformation and the connection strength of the annular buckle.
[0011] Preferably, the bearing cavity is provided with, from the inside out, an inner retainer, a bearing, a shaft seal, a bore seal, a sealing ring, and a sealing cover. The central holes of the inner retainer, bearing, shaft seal, bore seal, sealing ring, and sealing cover are all coaxially arranged. The inner retainer and bore seal abut against the inner and outer sides of the outer ring of the bearing, respectively. The shaft seal is located between the bearing and the bore seal, and abuts against the outer side of the inner ring of the bearing. The shaft seal and the bore seal have mating labyrinth connection structures on opposite sides. The sealing cover is located outside the bore seal, and an inner ring is located at the center of the sealing cover near the bore seal end. The sealing ring is fitted onto the inner ring of the sealing cover. The sealing cover and the polymer bearing housing body have mating curved sealing structures on opposite sides. This arrangement improves the sealing performance of the easily press-fit bearing housing during use.
[0012] Preferably, the nominal radial clearance of the curved sealing structure is 0.5 mm, and the nominal axial clearance is 1 mm. This design allows space for radial deformation of the easily press-fitted bearing housing due to temperature, preventing it from compressing the sealing groove of the curved sealing structure during deformation.
[0013] For another purpose of the present invention, a composite sealing polymer idler roller is also provided, including the above-mentioned easy-press bearing housing.
[0014] Preferably, the above-mentioned composite sealed polymer idler roller further includes an ultra-high molecular weight polymer (UHMWPP) tube, a shaft retaining ring, a roller shaft, and a steel liner. Two easily press-fit bearing seats are snapped into the two ends of the UHMWPP tube. The steel liner passes through the UHMWPP tube and is located between the two easily press-fit bearing seats. The roller shaft passes through the steel liner, and both ends of the roller shaft are rotatably connected to the corresponding easily press-fit bearing seats. Both ends of the steel liner are respectively sleeved on the inner end of the corresponding polymer bearing seat body, and the end of the steel liner extends to the top of the bearing. The shaft retaining ring is snapped onto the roller shaft and abuts against the outside of the sealing cover.
[0015] This utility model also includes other components that enable its normal use, all of which are conventional means in the field. In addition, the devices or components not limited in this utility model, such as ultra-high molecular weight tubes, rollers, bearings, labyrinth connection structures, curved sealing structures, and the materials of the polymer bearing seat body, all adopt the prior art in the field.
[0016] The working principle of this utility model is as follows: during use, the shaft seal and sealing ring respectively roll with the bore seal, and the sealing cover rolls with the polymer bearing seat. This application solves the problem of damage that easily occurs during the pressing process of the composite sealed polymer idler roller while ensuring the lifespan of the polymer bearing seat itself and the noise reduction effect. It also ensures the effectiveness of the easy-to-press bearing seat fit during use, preventing damage due to assembly failure of the easy-to-press bearing seat. Secondly, it improves the sealing structure of conventional bearing seats, ensuring the waterproof performance of the composite sealed polymer idler roller while maintaining good flexibility of the polymer material (such as ultra-high molecular weight polyethylene) under temperature deformation. Furthermore, in applications where immersion protection is not required, this utility model can be assembled using conventional methods. The sealing ring and other sealing components can be lengthened to increase the total length of the sealing labyrinth, enhancing waterproof performance without affecting overall flexibility. When applied to harsh conditions requiring immersion protection, a contact-type waterproof sealing ring can be used, allowing the idler roller to adapt to even harsher conditions and ensuring bearing life.
[0017] Compared with the prior art, this application has the following beneficial effects:
[0018] The easily press-fit bearing housing of this application solves the problem of easy pipe breakage during the press-fitting of traditional idlers, which helps to improve the production efficiency of composite sealing polymer idlers and saves manufacturing costs. At the same time, it improves the sealing effect of composite sealing polymer idlers, enabling them to cope with harsher operating conditions. Attached Figure Description
[0019] Figure 1 This is a schematic diagram of the main structure of the present invention in Embodiment 1.
[0020] Figure 2 for Figure 1 A schematic diagram of the AA-direction cross-section structure.
[0021] Figure 3 This is a three-dimensional structural schematic diagram of the present invention from one perspective in Embodiment 1.
[0022] Figure 4 This is an exploded structural diagram of the present invention from one perspective in Embodiment 1.
[0023] Figure 5 This is an exploded structural diagram of the present invention from another perspective in Embodiment 1.
[0024] Figure 6 This is a schematic diagram of the overall structure of the present invention in Embodiment 2.
[0025] Figure 7 This is a schematic diagram of the CC-direction cross-sectional structure in section 6.
[0026] Figure 8 yes Figure 7 A magnified structural diagram of part B in the diagram. Detailed implementation methods;
[0028] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.
[0029] Example 1
[0030] like Figures 1-5 As shown, this embodiment proposes an easy-to-press bearing housing, including a polymer bearing housing body 1. The polymer bearing housing body has a bearing cavity inside, and a shaft hole 2 is provided on the inner side of the bearing cavity. A protruding annular buckle 3 is provided on the outer surface of the end of the polymer bearing housing body away from the shaft hole. An annular groove 4 is provided on the inner side of the annular buckle. Four slots 5 are evenly distributed along the circumferential direction on the annular buckle, and the slots are connected to the annular groove.
[0031] Specifically, the polymer bearing housing body has twenty silencing holes 6 evenly distributed circumferentially at the shaft hole end. The opening shape of the silencing holes is trapezoidal. This arrangement has the effects of weight reduction, vibration damping, and noise reduction.
[0032] In this embodiment, the bearing cavity is provided with an inner retainer 7, a bearing 8, a shaft seal 9, a bore seal 10, a sealing ring 11, and a sealing cover 12, arranged sequentially from the inside to the outside. The central holes of the inner retainer, bearing, shaft seal, bore seal, sealing ring, and sealing cover are all coaxially arranged. The inner retainer and bore seal abut against the inner and outer sides of the outer ring of the bearing, respectively. The shaft seal is located between the bearing and the bore seal, and abuts against the outer side of the inner ring of the bearing. The shaft seal and the bore seal have mating labyrinth connection structures on opposite sides. The sealing cover is located outside the bore seal, and an inner ring 13 is located near the bore seal end at the central hole of the sealing cover. The sealing ring is fitted onto the inner ring of the sealing cover. The sealing cover and the polymer bearing housing body have mating curved sealing structures on opposite sides. This arrangement improves the sealing performance of the easily press-fit bearing housing during use.
[0033] More specifically, the nominal radial clearance of the curved sealing structure is 0.5 mm, and the nominal axial clearance is 1 mm. This design allows space for radial deformation of the easily press-fitted bearing housing due to temperature, preventing it from squeezing the sealing groove of the curved sealing structure during deformation.
[0034] This solution adds an annular groove to the inner side of the annular snap fastener of the polymer bearing housing body, and adds grooves evenly distributed along the circumference in the radial direction of the annular snap fastener. This can form a deformation snap fastener on the outermost ring of the polymer bearing housing body, so that the composite sealing polymer idler roller can share the deformation of the pipe opening caused by pressing into the annular snap fastener of the polymer bearing housing body during the pressing process, thus reducing the pipe opening cracking that occurs in the bearing housing pressing process.
[0035] Example 2
[0036] like Figures 6-8 As shown, this embodiment proposes a composite sealed polymer idler roller, including the easily press-fit bearing housings from Embodiment 1. It also includes an ultra-high molecular weight polymer (UHMWPP) tube 14, a shaft retaining ring 15, a roller shaft 16, and a steel liner tube 17. Two easily press-fit bearing housings are snapped into the two ends of the UHMWPP tube. The steel liner tube passes through the UHMWPP tube and is positioned between the two easily press-fit bearing housings. The roller shaft passes through the steel liner tube, and both ends of the roller shaft are rotatably connected to the corresponding easily press-fit bearing housings. Both ends of the steel liner tube are respectively sleeved on the inner ends of the corresponding polymer bearing housing bodies, and the end of the steel liner tube extends above the bearing. The shaft retaining ring is snapped onto the roller shaft and abuts against the outside of the sealing cover.
[0037] The working principle of this utility model is as follows: during use, the shaft seal and sealing ring respectively roll with the bore seal, and the sealing cover rolls with the polymer bearing seat. This application solves the problem of damage that easily occurs during the pressing process of the composite sealed polymer idler roller while ensuring the lifespan of the polymer bearing seat itself and the noise reduction effect. It also ensures the effectiveness of the easy-to-press bearing seat fit during use, preventing damage due to assembly failure of the easy-to-press bearing seat. Secondly, it improves the sealing structure of conventional bearing seats, ensuring the waterproof performance of the composite sealed polymer idler roller while maintaining good flexibility of the polymer material (such as ultra-high molecular weight polyethylene) under temperature deformation. Furthermore, in applications where immersion protection is not required, this utility model can be assembled using conventional methods. The sealing ring and other sealing components can be lengthened to increase the total length of the sealing labyrinth, enhancing waterproof performance without affecting overall flexibility. When applied to harsh conditions requiring immersion protection, a contact-type waterproof sealing ring can be used, allowing the idler roller to adapt to even harsher conditions and ensuring bearing life.
[0038] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A bearing seat easy to press-mount, comprising a high-molecular bearing seat body, a bearing cavity is arranged in the high-molecular bearing seat body, a shaft hole is arranged at the inner side of the bearing cavity, characterized in that: The outer surface of the one end of the polymer bearing seat body away from the shaft hole is provided with an outwardly convex annular buckle, the inner side of the annular buckle is provided with an annular groove, and the annular buckle is uniformly provided with at least two grooves along the circumferential direction, and the grooves are communicated with the annular groove.
2. A press pack bearing housing according to claim 1, wherein: The shaft hole end of the polymer bearing seat body is uniformly provided with a plurality of mute holes in the circumferential direction, and the hole port of the mute hole is in the shape of a trapezoid.
3. A press pack bearing housing according to claim 1, wherein: The number of the grooves is four.
4. A press pack bearing housing according to claim 1, wherein: The bearing cavity is sequentially provided with an inner stop, a bearing, a shaft seal, a hole seal, a sealing ring and a sealing cover from inside to outside, and the central holes of the inner stop, the bearing, the shaft seal, the hole seal, the sealing ring and the sealing cover are coaxially arranged, the inner stop and the hole seal are respectively abutted on the inner and outer sides of the outer ring of the bearing, the shaft seal is arranged between the bearing and the hole stop ring and abutted on the outer side of the inner ring of the bearing, the opposite sides of the shaft seal and the hole stop ring are provided with matched labyrinth connection structures, the sealing cover is arranged on the outer side of the hole seal, and the central hole of the sealing cover is provided with an inner ring close to the hole stop ring end, the sealing ring is sleeved on the inner ring of the sealing cover, and the opposite sides of the sealing cover and the polymer bearing seat body are provided with matched curved sealing structures.
5. A press pack bearing housing according to claim 4, wherein: The radial gap of the curved sealing structure has a nominal size of 0.5 mm, and the axial gap has a nominal size of 1 mm.
6. A composite sealed polymer idler characterized by: The bearing seat is easy to press and install.
7. The composite sealed polymer idler of claim 6, wherein: The bearing seat is easy to press and install. The bearing seat is easy to press and install.