Carrier roller structure

Abstract

The utility model relates to a carrier roller structure, and relates to the technical field of carrier rollers, the carrier roller structure comprises a roller skin, a working shaft, a check ring, a shield, a tapered roller bearing, a sealing structure and a buffer structure, the roller skin is cylindrical, the interior of the roller skin is hollow, and the two ends of the roller skin are through; the working shaft penetrates through the roller skin, and the two ends of the working shaft are exposed; the two ends of the working shaft are sleeved with the check rings, and the check rings abut against the inner wall face of the roller skin; the protective covers are arranged at the two ends of the working shaft in a sleeving mode. The tapered roller bearings are arranged at the two ends of the working shaft in a sleeving manner and abut against the inner wall surface of the roller skin; the sealing structures are arranged at the two ends of the working shaft in a sleeving mode and located between the protective cover and the tapered roller bearing. And the buffer structure is sleeved on the roller skin. The problems that when an existing carrier roller encounters heavy load or is impacted, a working shaft is stressed and bent, angle deviation exists between the working shaft and a bearing, the bearing is prone to damage, and the service life of the carrier roller is shortened are solved.

Description

TECHNICAL FIELD

[0001] The application relates to a roller structure. BACKGROUND

[0002] With the emergence of high-traffic large-belt feeders, the requirements for the load rollers thereof are also increased. As an important component of the belt feeder, the high-quality load roller needs to have the characteristics of small rotational inertia, strong impact resistance and long roller service life. The normal service life of the load roller is more than 30000 hours, and the load roller should be replaced in time in the case of abnormal sound and non-rotation. The bearing is one of the key components of the load roller, which determines the running performance and service life of the load roller. The bearing used in the traditional load roller is a C3 series deep groove ball bearing, and the disadvantage is that the inner ring groove has a large fatigue probability, and when heavy load and impact are encountered, the working shaft is bent under stress to form an angle deviation with the bearing, which causes damage to the working shaft and the bearing, and reduces the service life of the load roller. CONTENT OF THE INVENTION

[0003] The application provides a load roller structure to solve the problem that the working shaft of the current load roller is bent under stress when heavy load or impact is encountered, which causes an angle deviation between the working shaft and the bearing, and the bearing is easily damaged, thereby reducing the service life of the load roller.

[0004] A load roller structure comprises:

[0005] A roller skin is in a cylindrical shape, the roller skin is hollow inside and penetrates through both ends;

[0006] A working shaft is arranged through the roller skin, and both ends of the working shaft are exposed;

[0007] A retaining ring is arranged around both ends of the working shaft and abuts against the inner wall of the roller skin;

[0008] A protective cover is arranged around both ends of the working shaft;

[0009] A tapered roller bearing is arranged between the protective cover and the retaining ring, the tapered roller bearing is arranged around both ends of the working shaft and abuts against the inner wall of the roller skin.

[0010] A sealing structure is arranged around both ends of the working shaft and located between the protective cover and the tapered roller bearing;

[0011] A buffer structure is arranged around the roller skin.

[0012] By adopting the technical scheme, when the carrier roller is subjected to heavy load or strong impact, the working shaft is bent under force, the tapered roller bearing can bear larger radial force and axial force, and can adapt to the bending of the working shaft through the deflection angle, so that the bearing rotates stably and with low friction, the normal operation of the bearing is ensured, the service life of the bearing is prolonged, the long-term stable operation of the entire carrier roller structure is indirectly ensured, the impact force can be absorbed and dispersed by the buffer structure, the impact force is avoided from being directly transmitted to the core components of the carrier roller, the components in the carrier roller are protected, the damage risk caused by the impact is reduced, and the impact resistance of the carrier roller is improved.

[0013] In one of the embodiments, the inner wall surface of the roll cover is concavely provided with a step, and the retaining ring is in abutment with the step.

[0014] By adopting the technical scheme, the step concavely provided in the inner wall surface of the roll cover is in abutment with the retaining ring, a clear and stable supporting position is provided for the retaining ring, so that the retaining ring will not be easily displaced during the operation of the carrier roller. The precise positioning function not only facilitates the stable support of the bearing, the sealing structure and the like, but also ensures that the relative correct positional relationship between the components is maintained, which is beneficial to the stable operation of the carrier roller structure and the collaborative function of the components.

[0015] In one of the embodiments, the buffer structure is buffer rubber, and the buffer rubber is concavely provided with a plurality of openings.

[0016] By adopting the technical scheme, the buffer rubber itself has good elasticity, when the carrier roller is subjected to strong impact, the buffer rubber can absorb and relieve the impact force through the elastic deformation of itself, and the influence of the impact force on the overall structure of the carrier roller is reduced; the openings provided on the buffer rubber can make the rubber deform more flexibly in different directions, change the transmission path of the impact force, and make the impact force be more evenly dispersed in each part of the rubber, so that stress concentration in the local area is avoided, and the carrier roller is better protected from damage caused by strong impact.

[0017] In one of the embodiments, the openings are arranged in a honeycomb shape or a spiral shape.

[0018] By adopting the technical scheme, the opening layout can make the stress of the buffer rubber be more evenly distributed when the buffer rubber is subjected to impact, and avoid tearing phenomenon caused by excessive local stress.

[0019] In one of the embodiments, the carrier roller structure further comprises an adhesive layer, and the adhesive layer is arranged between the buffer structure and the roll cover.

[0020] By adopting the technical scheme, the connection stability between the buffer structure and the roll cover can be greatly enhanced, displacement or falling of the buffer rubber due to factors such as vibration and friction in a long-term use process can be prevented, the buffer structure can always play a role in the correct position, and the buffer performance of the carrier roller structure can be maintained.

[0021] In one of the embodiments, the sealing structure comprises a labyrinth seal ring arranged between the shield and the tapered roller bearing.

[0022] By adopting the technical scheme, the labyrinth seal ring can seal the space between the working shaft and the roll cover, and the special labyrinth structure increases the tortuosity of the path of water and dust entering the carrier roller, effectively blocks water, dust and other impurities in the external environment from entering the key area where the bearing is located from the side of the shield, creates a relatively clean and dry working environment for the bearing, reduces bearing wear and corrosion caused by impurities, and helps to prolong the service life of the bearing.

[0023] In one of the embodiments, the labyrinth seal ring comprises an outer labyrinth seal ring arranged close to the side of the shield and connected with the outer wall surface of the working shaft, and an inner labyrinth seal ring arranged close to the side of the tapered roller bearing and connected with the inner wall surface of the roll cover, and the outer labyrinth seal ring and the inner labyrinth seal ring are cooperatively sealed.

[0024] By adopting the technical scheme, this connection and fixing mode makes the two seal rings more stable in their respective positions and less likely to be displaced due to the rotation and vibration of the carrier roller, can effectively prevent impurities from invading the bearing area from different directions in a complex working environment, and ensures that the carrier roller can maintain good sealing performance and working state in harsh conditions.

[0025] In one of the embodiments, the sealing structure further comprises a cover cap sleeved on the working shaft and located between the shield and the outer labyrinth seal ring.

[0026] By adopting the technical scheme, the cover cap can fill the gap that may exist between the shield and the outer labyrinth seal ring, avoid external water, dust and other impurities from entering the carrier roller through these small gaps, and further improve the sealing structure and enhance the tightness and integrity of the entire sealing system.

[0027] In one of the embodiments, the carrier roller structure further comprises a sealing ring sleeved on the working shaft and located between the tapered roller bearing and the retainer.

[0028] By adopting the technical scheme, the sealing ring can further prevent external impurities from entering the inside of the roll cover, thereby ensuring that the carrier roller structure can continuously and reliably work, and reducing the equipment maintenance cost and downtime caused by sealing problems.

[0029] In one of the embodiments, the tapered roller bearing includes an inner ring, an outer ring, a cage and tapered rollers, the inner ring is sleeved on the working shaft, the outer ring is sleeved on the inner ring, the cage is arranged between the inner ring and the outer ring, and the tapered rollers are arranged in the cage.

[0030] By adopting the technical scheme, the working shaft can rotate stably and with low friction through the rolling contact between the tapered rollers and the inner and outer rings during rotation, and the carrier roller can still operate stably under complex stress conditions, thereby reducing the risk of component damage caused by uneven stress or overload and improving the adaptability of the carrier roller structure to different working conditions.

[0031] In summary, the present application has at least one beneficial effect:

[0032] 1. The tapered roller bearing is sleeved on the working shaft, and when the carrier roller is subjected to heavy load or strong impact, the working shaft is bent under stress, the tapered roller bearing can withstand large radial force and axial force, can adapt to the bending of the working shaft through the deflection angle, can rotate stably and with low friction, can ensure normal operation of the bearing, can prolong the service life of the bearing, and can indirectly ensure long-term stable operation of the entire carrier roller structure; meanwhile, the buffer structure can absorb and disperse impact force, avoid direct transmission of the impact force to the core components of the carrier roller, protect the components in the carrier roller, reduce the damage risk caused by impact, and improve the impact resistance of the carrier roller.

[0033] 2. The step recessed in the inner wall of the roll cover abuts against the retainer, thereby providing a clear and stable support position for the retainer, so that the retainer will not be easily displaced during operation of the carrier roller. The precise positioning not only facilitates stable support of the bearing, the sealing structure and other components, but also ensures that the components maintain a correct relative position relationship, which is conducive to stable operation of the carrier roller structure and cooperative action of the components.

[0034] 3. The labyrinth sealing ring can seal the space between the working shaft and the roll cover, and the special labyrinth structure increases the tortuosity of the path of water and dust entering the inside of the carrier roller, effectively blocks water, dust and other impurities in the external environment from entering the key area where the bearing is located from the side of the protective cover, creates a relatively clean and dry working environment for the bearing, reduces bearing wear and corrosion caused by impurities, and helps to prolong the service life of the bearing. BRIEF DESCRIPTION OF DRAWINGS

[0035] Figure 1 This is a cross-sectional schematic diagram of a roller structure provided in an embodiment of this application;

[0036] Figure 2 This is a schematic cross-sectional view of a roller skin provided in an embodiment of this application;

[0037] Figure 3 yes Figure 1 A magnified view of part A in the middle;

[0038] Figure 4 yes Figure 1 A magnified view of part B in the middle section;

[0039] Figure 5 yes Figure 1 A magnified view of part C in the middle.

[0040] Explanation of reference numerals in the attached drawings: 1. Idler roller structure; 11. Roller skin; 111. Step; 12. Working shaft; 13. Retaining ring; 14. Protective cover; 15. Tapered roller bearing; 151. Inner ring; 152. Outer ring; 153. Cage; 154. Tapered roller; 16. Sealing structure; 161. Labyrinth seal; 162. Outer labyrinth seal; 163. Inner labyrinth seal; 164. Cover; 165. Protrusion; 17. Buffer structure; 171. Buffer rubber; 172. Opening; 18. Sealing ring. Detailed Implementation

[0041] The following is in conjunction with the appendix Figures 1-5 The idler roller structure provided in this application will be described in further detail.

[0042] Example 1

[0043] Please see Figures 1-5 The idler structure 1 provided in this application embodiment includes a roller skin 11, a working shaft 12, a retaining ring 13, a protective cover 14, a tapered roller bearing 15, a sealing structure 16, and a buffer structure 17.

[0044] like Figures 1-2 As shown, the roller skin 11 is cylindrical, hollow inside, and open at both ends. The roller skin 11 surrounds the middle portion of the working shaft 12, leaving both ends of the working shaft 12 exposed. The roller skin 11 is a cylinder made of high-strength steel, possessing good wear resistance and load-bearing capacity; alternatively, stainless steel or carbon steel can be chosen as the material for the roller skin 11 to improve its corrosion resistance and strength. The thickness of the roller skin 11 is approximately 8 mm. The inner wall surface of the roller skin 11 can be machined into a smooth surface to reduce friction and wear. Furthermore, a layer of nano-lubricant can be coated on the inner wall surface to further reduce the coefficient of friction.

[0045] The working shaft 12 is made of high-strength stainless steel, which has good corrosion resistance and mechanical properties. The middle part of the working shaft 12 can be designed with a gradually changing cross-section, i.e., the middle part of the working shaft 12 is thicker, and the two ends are gradually tapered, to increase the rigidity and bending resistance of the working shaft 12. The surface of the working shaft 12 can be subjected to nitriding treatment to improve its hardness and wear resistance.

[0046] As shown in Figure 3 The retaining ring 13 is sleeved on both ends of the working shaft 12 and abuts against the inner wall surface of the roller skin 11. The retaining ring 13 is made of wear-resistant material, such as polyurethane or nylon, and has high elasticity and wear resistance. The outer diameter of the retaining ring 13 is slightly larger than the inner diameter of the roller skin 11, so that it can be firmly fixed on the inner wall of the roller skin 11. In addition, the thickness of the retaining ring 13 can be adjusted according to actual needs to adapt to working shafts 12 of different diameters.

[0047] The shield 14 is made of aluminum alloy or plastic, which has the characteristics of light weight and corrosion resistance. The shield 14 is sleeved on both ends of the working shaft 12, and the inner diameter of the shield 14 is slightly larger than the outer diameter of the working shaft 12 to facilitate assembly.

[0048] The inner wall surface of the roller skin 11 can be concavely provided with a step 111, so that the thickness of the roller skin 11 at both ends is reduced by 1 to 3 mm. The surface of the step 111 can be polished to reduce friction and wear. The retaining ring 13 abuts against the step 111, so that the retaining ring 13 can be firmly fixed on the inner wall of the roller skin 11 and will not easily fall off, and can support other structures to prevent other structures from moving inwardly of the roller skin 11.

[0049] As shown in Figure 4 The tapered roller bearing 15 is composed of an inner ring 151, an outer ring 152, a retainer 153, and tapered rollers 154. The inner ring 151 is sleeved on the working shaft 12, the outer ring 152 is sleeved on the inner ring 151, the retainer 153 is arranged between the inner ring 151 and the outer ring 152, and the tapered rollers 154 are arranged in the retainer 153. This structure can effectively bear radial and axial loads and is suitable for heavy load and high-speed operation occasions. The inner ring 151 and the outer ring 152 can be made of high-strength alloy steel, the retainer 153 can be made of brass or nylon, and the tapered rollers 154 can be made of high-carbon chromium bearing steel to improve their durability and reliability.

[0050] As shown in Figure 5As shown, the sealing structure 16 includes a labyrinth seal ring 161, which is sleeved on the working shaft 12 and arranged between the tapered roller bearing 15 and the shroud 14. Specifically, the labyrinth seal ring 161 includes a labyrinth outer seal ring 162 arranged on the side close to the shroud 14 and connected with the outer wall surface of the working shaft 12, and a labyrinth inner seal ring 163 arranged on the side close to the tapered roller bearing 15 and connected with the inner wall surface of the roller skin 11, and the labyrinth outer seal ring 162 and the labyrinth inner seal ring 163 are cooperatively sealed. The material of the labyrinth seal ring 161 can be rubber or silicone, which has good sealing performance and temperature resistance. In addition, the thickness of the labyrinth seal ring 161 can be adjusted according to actual needs to adapt to different environmental conditions. In this embodiment, a plurality of protrusions 165 are arranged at one end of the labyrinth outer seal ring 162 towards the tapered roller bearing 15, and a plurality of protrusions 165 are also arranged at one end of the labyrinth inner seal ring 163 towards the shroud 14, and gaps are left between the protrusions 165, so that the protrusions 165 arranged on the labyrinth outer seal ring 162 can be inserted into the gaps between the protrusions 165 on the labyrinth inner seal ring 163, and the protrusions 165 arranged on the labyrinth inner seal ring 163 can be inserted into the gaps between the protrusions 165 on the labyrinth outer seal ring 162.

[0051] The sealing structure 16 can also include a cover 164, which is sleeved on the working shaft 12 and arranged between the labyrinth outer seal ring 162 and the shroud 14. The cover 164 can seal the gap between the shroud 14 and the labyrinth outer seal ring 162, and the shroud 14, the cover 164 and the labyrinth seal ring 161 cooperatively prevent external air and water from entering and protect the internal components from being contaminated. The material of the cover 164 can be stainless steel or aluminum alloy to adapt to different working environments.

[0052] The buffer structure 17 can be a buffer rubber 171, which is concavely provided with a plurality of openings 172. The buffer rubber 171 can be made of high-elasticity materials such as natural rubber or synthetic rubber, which has good buffering performance. The openings 172 on the buffer rubber 171 can be designed in different shapes and sizes to adapt to different impact loads. For example, the openings 172 can be designed in circular, square or elliptical shapes, and each shape of the openings 172 can have different numbers, and the openings 172 can be arranged in a honeycomb or spiral shape to increase the buffering effect. In addition, the thickness of the buffer rubber 171 can be adjusted according to actual needs to adapt to different application environments. The buffer structure 17 can also be made of multi-layer composite materials, including rubber layer, foam layer and metal mesh layer, which combines the advantages of multiple materials to improve the buffering effect and durability. An adhesive layer can also be arranged between the buffer rubber 171 and the roller skin 11 to enhance the connection strength between them.

[0053] The carrier roller structure 1 further comprises a sealing ring 18, which is sleeved on the working shaft 12 and located between the tapered roller bearing 15 and the retainer 13. The sealing ring 18 can further improve the sealing effect and prevent external contaminants from entering. The sealing ring 18 can be made of high-temperature-resistant and corrosion-resistant materials such as fluororubber or silicone rubber, which has good sealing performance. The thickness of the sealing ring 18 can be adjusted according to actual needs to adapt to different application environments. The shape of the sealing ring 18 can be designed as a circle or other suitable shapes to ensure its close contact with the tapered roller bearing 15 and the retainer 13. In addition, the installation position of the sealing ring 18 can be adjusted according to actual needs to achieve the best sealing effect.

[0054] Elastic supports can also be provided at both ends of the working shaft 12 to further improve the bending resistance and stability of the working shaft 12. Specifically, the elastic supports comprise support seats fixed on the inner wall surface of the roller skin 11 and elastic elements provided between the support seats and the working shaft 12. The elastic elements can be springs or rubber blocks. The function of the elastic elements is to absorb part of the energy through their elastic deformation when the working shaft 12 is impacted, which can slow down the bending deformation of the working shaft 12.

[0055] The implementation principle of the present embodiment is that by setting the buffer structure 17 and the tapered roller bearing 15, when the carrier roller is subjected to heavy load or strong impact, the buffer structure 17 can absorb the impact energy, and at the same time, the working shaft 12 is bent to produce deflection, and the tapered roller bearing 15 can be deflected to adjust the error between the working shaft 12, adapt to the bending of the working shaft 12, ensure the normal operation of the bearing, prolong the service life of the bearing, so that the carrier roller structure 1 is suitable for heavy load scenes and can resist impact. In addition, by setting the protective cover 14, the sealing structure 16 and the sealing ring 18, external air and water can be effectively prevented from entering the inside of the carrier roller, and the internal components are protected from pollution, thereby improving the overall reliability and service life of the carrier roller.

[0056] The above are preferred embodiments of the present application, which do not limit the protection scope of the present application, therefore: any equivalent changes made on the structure, shape, principle of the present application shall be covered within the protection scope of the present application.

Claims

1. A roller structure, characterized by, The roll structure (1) comprises: a roll skin (11) in a cylindrical shape, the roll skin (11) being hollow inside and having both ends penetrating through; a working shaft (12) penetrating through the roll skin (11) and having both ends exposed; a retaining ring (13) sleeved on both ends of the working shaft (12) and abutting against the inner wall surface of the roll skin (11); a shroud (14) sleeved on both ends of the working shaft (12); a tapered roller bearing (15) arranged between the shroud (14) and the retaining ring (13), the tapered roller bearing (15) being sleeved on both ends of the working shaft (12) and abutting against the inner wall surface of the roll skin (11); a sealing structure (16) sleeved on both ends of the working shaft (12) and located between the shroud (14) and the tapered roller bearing (15); and a buffer structure (17) sleeved on the roll skin (11).

2. A roller structure according to claim 1, characterised in that The inner wall surface of the roll skin (11) is concavely provided with a step (111), and the retaining ring (13) abuts against the step (111).

3. A roller structure according to claim 1, wherein The buffer structure (17) is a buffer rubber (171) concavely provided with a plurality of openings (172).

4. A roller structure according to claim 3, characterised in that The openings (172) are arranged in a honeycomb shape or a spiral shape.

5. A roller structure according to claim 1, wherein The roll structure (1) further comprises an adhesive layer arranged between the buffer structure (17) and the roll skin (11).

6. A roller structure according to claim 1, wherein The sealing structure (16) comprises a labyrinth seal ring (161) arranged between the shroud (14) and the tapered roller bearing (15).

7. A roller construction according to claim 6, characterised in that The labyrinth seal ring (161) comprises a labyrinth outer seal ring (162) arranged on the side close to the shroud (14) and connected with the outer wall surface of the working shaft (12), and a labyrinth inner seal ring (163) arranged on the side close to the tapered roller bearing (15) and connected with the inner wall surface of the roll skin (11), and the labyrinth outer seal ring (162) and the labyrinth inner seal ring (163) cooperate to seal.

8. A roller structure according to claim 7, characterised in that The sealing structure (16) further comprises a cover (164) sleeved on the working shaft (12) and located between the shroud (14) and the labyrinth outer seal ring (162).

9. A roller construction according to claim 1, characterized in that The roll structure (1) further comprises a sealing ring (18) sleeved on the working shaft (12) and located between the tapered roller bearing (15) and the retaining ring (13).

10. A roller structure according to claim 1, wherein The tapered roller bearing (15) comprises an inner ring (151) sleeved on the working shaft (12), an outer ring (152) sleeved on the inner ring (151), a retainer (153) arranged between the inner ring (151) and the outer ring (152), and tapered rollers (154) arranged at intervals in the retainer (153).

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