Dustproof and waterproof sealing device for carrier roller

Abstract

The utility model belongs to the field of carrier rollers, and particularly relates to a dustproof and waterproof sealing device for a carrier roller. The sealing device comprises a protective ring, a labyrinth outer seal and a labyrinth inner seal which are sequentially arranged on a carrier roller shaft in a sleeving mode from inside to outside. An outer clamping groove is formed in the end face, close to the carrier roller shaft, of the labyrinth outer seal, and the inner side of the protection ring extends into the outer clamping groove. At least one inlaying boss is arranged on the butt joint face of the protective ring and the labyrinth outer seal, and at least one inlaying groove matched with the inlaying boss is formed in the butt joint face of the labyrinth outer seal and the protective ring. The protection ring and the labyrinth outer seal are matched and sealed through the semicircular inlay boss and the inlay groove, stable connection and good sealing effect of the protection ring and the labyrinth outer seal can be achieved through a simple structure, and the problem that in the prior art, the sealing effect is poor due to the fact that the matching tightness is not high is solved. And the phenomenon that external water enters the interior through a gap between the shaft and the sealing piece to damage the carrier roller is avoided.

Description

Technical Field

[0001] The utility model belongs to the field of rollers, and in particular relates to a dustproof and waterproof sealing device for rollers. Background Art

[0002] Rollers are the most used components in belt conveyors, used to support the weight of conveyor belts and materials. The performance, lifespan, and rotational resistance of rollers directly affect the performance of belt conveyors. When rollers are in use, dust and rain from the outside environment can easily enter the rollers and cause damage to the bearings at both ends.

[0003] The roller sealing structure on the market is used between the inner wall of the roller bearing chamber and the roller shaft, and is arranged on the outside of the bearing. Most of them are maze-type five-piece combination structures. The sealing effect of the entire structure can only be protected by the maze-type inner and outer seals alone. Due to the limitations of its own structure, the gap between the seal and the shaft is relatively large, which has a certain dust-proof effect. However, when it rains, rainwater will enter the inner cavity from the gap between the seal and the shaft, that is, the existing roller sealing device is not waterproof enough. At the same time, the bearing seat is not sealed, and flying dust and water will enter the inner cavity from between the bearing seat and the shaft, resulting in a shortened service life of the roller and even affecting work efficiency. Utility Model Content

[0004] The utility model aims to overcome the defects of insufficient water resistance and dust resistance in the prior art, and provides a dust and water resistance and waterproof sealing device for a supporting roller with good dust and water resistance.

[0005] The technical solution adopted by the utility model to solve its technical problems is:

[0006] A dustproof and waterproof sealing device for a roller comprises a labyrinth inner seal, a labyrinth outer seal and a protective ring which are sequentially arranged on the roller shaft from the inside to the outside; a plurality of sealing grooves are arranged on the outer side of the labyrinth inner seal, and a sealing boss which matches with the sealing grooves is arranged on the inner side of the labyrinth outer seal;

[0007] An external clamping groove is provided on the end surface of the labyrinth outer seal close to the roller shaft, and the inner side of the protective ring extends into the external clamping groove; at least one inlay boss is provided on the mating surface between the protective ring and the labyrinth outer seal, and at least one inlay groove matching the inlay boss is provided on the mating surface between the labyrinth outer seal and the protective ring.

[0008] Furthermore, it also includes a through cover, which is coaxially assembled on the roller shaft and arranged between the protective ring and the labyrinth outer seal.

[0009] Furthermore, the cross section of the through cover is a "Z-shaped" structure, including a support portion arranged between the bearing seat and the roller shaft, a blocking portion fixedly arranged on the outside of the support portion, and a matching connection portion fixedly arranged on the inside of the support portion;

[0010] The angle between the baffle portion and the support portion is 60°≤b<90°; an inner snap-in groove is provided on the end surface of the labyrinth inner seal close to the bearing seat, and the matching connection portion is matched and assembled with the inner snap-in groove.

[0011] Furthermore, the protection ring includes a protection body; a first transverse portion disposed inside the protection body and abutting against the roller shaft, a second transverse portion sealed with the through cover through a waterproof rubber ring, and an inclined ring fixedly connected to the protection body for external first-level waterproof and dustproof;

[0012] The end of the first transverse portion is assembled with the external clamping groove, the inlay boss is arranged on the opposite end face where the first transverse portion abuts against the roller shaft, and the inlay groove is opened on the inner wall of the external clamping groove; the end of the inclined ring away from the roller shaft is inclined toward the bearing seat.

[0013] Furthermore, the included angle between the tilting ring and the axis of the roller shaft is 45°≤a<90°.

[0014] Furthermore, the cross section of the waterproof rubber ring is a "V"-shaped structure, including a first support ring abutting against the second transverse portion and a second support ring connected to the first support ring;

[0015] The included angle between the first support ring and the second support ring is an obtuse angle; the end of the second support ring abuts against the outer side wall of the through cover.

[0016] Furthermore, it also includes a first sealing ring and a second sealing ring which are sleeved on the roller shaft; the first sealing ring and the second sealing ring are respectively arranged on the inner and outer sides of the bearing.

[0017] Furthermore, the protective ring is limited on the roller shaft by a retaining ring.

[0018] Furthermore, the inlay boss and the inlay groove each include two.

[0019] Furthermore, the protective ring is interference fit with the roller shaft, and the protective ring is not in direct contact with the bearing seat.

[0020] The beneficial effects of the dustproof and waterproof sealing device for a roller of the utility model are:

[0021] The protective ring and the labyrinth outer seal of the utility model are sealed by means of a semicircular inlaid boss and an inlaid groove, and a relatively simple structure can be used to achieve a relatively stable connection and a better sealing effect between the protective ring and the labyrinth outer seal, which changes the prior art in which the protective ring and multiple seals are independently sleeved on the roller shaft, and there is no mutual cooperation between the protective ring and the multiple seals, thereby solving the problem of poor sealing effect caused by weak cooperation in the prior art, and at the same time avoiding the phenomenon in the prior art that the gap between the seal and the roller shaft is large, resulting in external water entering the interior through the gap between the shaft and the seal to damage the roller. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0023] Figure 1 It is a cross-sectional view of the installation of the sealing device and the roller according to the embodiment of the utility model.

[0024] Figure 2 yes Figure 1 Detail of point A in the middle.

[0025] Figure 3 It is a cross-sectional detail view of the installation of the protective ring and the roller shaft of the embodiment of the utility model.

[0026] Figure 4 It is a cross-sectional view of the installation of the protective ring, the through cover and the waterproof rubber ring of the embodiment of the utility model.

[0027] In the figure: 1. roller shaft, 2. bearing, 3. bearing seat, 4. protective ring, 41. first transverse part, 42. second transverse part, 43. protective body, 44. tilting ring, 5. labyrinth outer seal, 6. labyrinth inner seal, 7. sealing boss, 8. sealing groove, 9. inlaid boss, 10. inlaid groove, 11. through cover, 111. supporting part, 112. blocking part, 113. matching connecting part, 12. waterproof rubber ring, 121. first supporting ring, 122. second supporting ring, 13. first sealing ring, 14. second sealing ring, 15. retaining ring, 16. outer card slot, 17. inner card slot. DETAILED DESCRIPTION

[0028] Now the utility model is further described in detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the utility model in a schematic manner, and therefore only show the components related to the utility model.

[0029] like Figure 1-Figure 4A specific embodiment of a dustproof and waterproof sealing device for a roller of the utility model shown in the figure comprises a labyrinth inner seal 6, a labyrinth outer seal 5 and a protective ring 4 which are arranged on the roller shaft 1 from the inside to the outside in sequence; a plurality of sealing grooves 8 are arranged on the outer side of the labyrinth inner seal 6, a sealing boss 7 which matches with the sealing groove 8 is arranged on the inner side of the labyrinth outer seal 5, an outer clamping groove 16 is opened on the end face of the labyrinth outer seal 5 close to the roller shaft 1, and the inner side of the protective ring 4 extends into the outer clamping groove 16; at least one inlay boss 9 is arranged on the mating surface between the protective ring 4 and the labyrinth outer seal 5, and at least one inlay groove 10 which matches with the inlay boss 9 is arranged on the mating surface between the labyrinth outer seal 5 and the protective ring 4. In this embodiment, both the inlay boss 9 and the inlay groove 10 include two.

[0030] The protective cover of the prior art is independently arranged with other seals, which only serves the purpose of protecting the internal structure, but has no waterproof effect. It only relies on other seals for sealing protection, and the protective effect is poor. The gap between the independently arranged protective cover and the roller shaft 1 is large, and rainwater can easily enter the seal from the gap between the two, thereby damaging the bearing 2 and affecting the normal use and service life of the roller.

[0031] The protective ring 4 of the utility model and the labyrinth outer seal 5 are sealed by means of a semicircular inlaid boss 9 and an inlaid groove 10. A relatively simple structure can be used to achieve a relatively stable connection and a better sealing effect between the protective ring 4 and the labyrinth outer seal 5. This changes the prior art in which the protective ring 4 and multiple seals are independently sleeved on the roller shaft 1, and there is no mutual cooperation between the protective ring 4 and the multiple seals, thereby solving the problem of poor sealing effect caused by weak cooperation. At the same time, it avoids the phenomenon in the prior art that the gap between the seal and the roller shaft 1 is large, causing external water to enter the interior through the gap between the shaft and the seal to damage the roller.

[0032] In this embodiment, a through cover 11 is also provided. The through cover 11 is coaxially assembled on the roller shaft 1 and is arranged between the protective ring 4 and the labyrinth outer seal 5. The cross section of the through cover 11 is a "Z-shaped" structure, including a support portion 111 arranged between the bearing seat 3 and the roller shaft 1, a baffle portion 112 fixedly arranged on the outside of the support portion 111, and a matching connection portion 113 fixedly arranged on the inside of the support portion 111. The angle between the baffle portion 112 and the support portion 111 is 60°≤b<90°; the end face of the labyrinth inner seal 6 close to the bearing seat 3 is provided with an inner clamping groove 17, and the matching connection portion 113 is matched and assembled with the inner clamping groove 17.

[0033] The protective ring 4 in this embodiment includes a protective body 43, a first transverse portion 41 disposed inside the protective body 43 and abutting against the roller shaft 1, a second transverse portion 42 sealed with the through cover 11 through a waterproof rubber ring 12, and an inclined ring 44 fixedly connected to the protective body 43 for external first-level waterproof and dustproof, the end of the first transverse portion 41 is assembled with the external clamping groove 16, the inlay boss 9 is disposed on the opposite end face where the first transverse portion 41 abuts against the roller shaft 1, the inlay groove 10 is provided on the inner wall of the external clamping groove 16, and the end of the inclined ring 44 away from the roller shaft 1 is inclined toward the bearing seat 3. It should be further explained that the protective ring 4 in this embodiment is interference fit with the roller shaft 1, and the protective ring 4 is not in direct contact with the bearing seat 3. In this embodiment, the angle between the inclined ring 44 and the axis of the roller shaft 1 is 45°≤a<90°. The setting of the inclined ring 44 allows the water falling on the outside of the protective ring 4 to flow out along the inclined surface of the inclined ring 44, achieving the first-level waterproof and dustproof effect. The protective ring 4 and the roller shaft 1 adopt an interference fit to prevent water from entering the inner cavity from the junction of the two. In addition, the outer ring of the protective ring 4 does not directly contact the bearing seat 3, so that the protective ring 4 does not rub against the bearing seat 3 when the roller shaft 1 rotates, thereby affecting the rotation effect of the roller.

[0034] During assembly, the protective ring 4 is limited on the roller shaft 1 by the retaining ring 15, the matching connection portion 113 of the through cover 11 is clamped in the inner clamping groove 17, and the blocking portion 112 of the through cover 11 is arranged between the first transverse portion 41 and the second transverse portion 42 of the protective ring 4, and the angle between the blocking portion 112 and the supporting portion 111 is 60°≤b<90°. When external water enters the protective ring 4, it flows from the first transverse portion 41 into the trumpet-shaped opening formed by the blocking portion 112 and the supporting portion 111, and is stored in the trumpet-shaped opening, which plays a second-level waterproof and dustproof effect. Figure 3 .

[0035] like Figure 4 As shown, the cross section of the waterproof rubber ring 12 in this embodiment is a "V"-shaped structure, including a first support ring 121 abutting against the second transverse portion 42 and a second support ring 122 connected to the first support ring 121, the angle between the first support ring 121 and the second support ring 122 is an obtuse angle, and the end of the second support ring 122 abuts against the outer wall of the through cover 11. Adding the waterproof rubber ring 12 between the through cover 11 and the protective ring 4, on the one hand, plays a role of supporting and closely fitting between the two, and on the other hand, forms a third level of waterproof and dustproof effect, further enhancing the waterproof and dustproof effect.

[0036] In this embodiment, the labyrinth outer seal 5 and the labyrinth inner seal 6 form a fourth level of waterproof and dustproof effect. The first seal ring 13 and the second seal ring 14 are respectively arranged on the inner and outer sides of the bearing 2. The first seal ring 13 and the second seal ring 14 are both sleeved on the roller shaft 1. The first seal ring 13 and the second seal ring 14 are both made of waterproof rubber material. The entry of external water is further prevented, and the service life of the roller is improved.

[0037] It should be understood that the specific embodiments described above are only used to explain the present invention, and are not used to limit the present invention. Obvious changes or modifications derived from the spirit of the present invention are still within the scope of protection of the present invention.

Claims

1. A dustproof and waterproof sealing device for a roller, characterized in that: It comprises a labyrinth inner seal (6), a labyrinth outer seal (5), and a protective ring (4) which are arranged on the roller shaft (1) from the inside to the outside in sequence; a plurality of sealing grooves (8) are arranged on the outside of the labyrinth inner seal (6), and a sealing boss (7) which matches the sealing grooves (8) is arranged on the inside of the labyrinth outer seal (5); An external clamping groove (16) is provided on the end surface of the labyrinth outer seal (5) close to the roller shaft (1), and the inner side of the protective ring (4) extends into the external clamping groove (16); at least one inlay boss (9) is provided on the mating surface between the protective ring (4) and the labyrinth outer seal (5), and at least one inlay groove (10) cooperating with the inlay boss (9) is provided on the mating surface between the labyrinth outer seal (5) and the protective ring (4).

2. A roller dustproof and waterproof sealing device according to claim 1, characterized in that: It also comprises a through cover (11), wherein the through cover (11) is coaxially mounted on the roller shaft (1) and is arranged between the protective ring (4) and the labyrinth outer seal (5).

3. A dustproof and waterproof sealing device for a roller according to claim 2, characterized in that: The cross section of the through cover (11) is in a "Z-shaped" structure, comprising a support portion (111) arranged between the bearing seat (3) and the roller shaft (1), a blocking portion (112) fixedly arranged on the outside of the support portion (111), and a matching connection portion (113) fixedly arranged on the inside of the support portion (111); The angle between the baffle portion (112) and the support portion (111) is 60°≤b<90°; an inner clamping groove (17) is provided on the end surface of the labyrinth inner seal (6) close to the bearing seat (3), and the matching connection portion (113) is matched and assembled with the inner clamping groove (17).

4. The dustproof and waterproof sealing device for a roller according to claim 2, characterized in that: The protection ring (4) comprises a protection body (43); a first transverse portion (41) disposed inside the protection body (43) and abutting against the roller shaft (1); a second transverse portion (42) sealed with the through cover (11) via a waterproof rubber ring (12); and an inclined ring (44) fixedly connected to the protection body (43) for first-level external waterproof and dustproofing; The end of the first transverse portion (41) is assembled with the external clamping groove (16); the inlay boss (9) is arranged on the opposite end surface of the first transverse portion (41) abutting against the roller shaft (1); the inlay groove (10) is formed on the inner wall of the external clamping groove (16); and the end of the inclined ring (44) away from the roller shaft (1) is inclined toward the bearing seat (3).

5. The dustproof and waterproof sealing device for a roller according to claim 4, characterized in that: The included angle between the inclined ring (44) and the axis of the roller shaft (1) is 45°≤a<90°.

6. The dustproof and waterproof sealing device for a roller according to claim 4, characterized in that: The cross section of the waterproof rubber ring (12) is in a "V"-shaped structure, and comprises a first support ring (121) abutting against the second transverse portion (42) and a second support ring (122) connected to the first support ring (121); The included angle between the first support ring (121) and the second support ring (122) is an obtuse angle; the end of the second support ring (122) abuts against the outer side wall of the through cover (11).

7. The dustproof and waterproof sealing device for a roller according to claim 1, characterized in that: It also comprises a first sealing ring (13) and a second sealing ring (14) which are sleeved on the roller shaft (1); the first sealing ring (13) and the second sealing ring (14) are respectively arranged on the inner and outer sides of the bearing (2).

8. The dustproof and waterproof sealing device for a roller according to claim 1, characterized in that: The protective ring (4) is limited on the roller shaft (1) by a retaining ring (15).

9. The dustproof and waterproof sealing device for a roller according to claim 1, characterized in that: The inlay boss (9) and the inlay groove (10) each include two.

10. A dustproof and waterproof sealing device for a roller according to any one of claims 1 to 9, characterized in that: The protective ring (4) is interference-fitted with the roller shaft (1), and the protective ring (4) is not in direct contact with the bearing seat (3).

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