CN111115426B

CN111115426B - Escalator and waterproof and dustproof roller assembly

Info

Publication number: CN111115426B
Application number: CN202010030649.3A
Authority: CN
Inventors: 梁家生; 张志强
Original assignee: Hitachi Elevator Guangzhou Escalator Co Ltd
Current assignee: Hitachi Elevator Guangzhou Escalator Co Ltd
Priority date: 2020-01-13
Filing date: 2020-01-13
Publication date: 2021-12-21
Anticipated expiration: 2040-01-13
Also published as: CN111115426A

Abstract

The invention relates to an escalator and a waterproof and dustproof roller assembly. The wheel shaft passes through the shaft hole of the roller, and the bearing sleeve is arranged on the wheel shaft and positioned at the shaft hole. The sealing inner ring is sleeved on the wheel shaft, and the sealing outer ring is sleeved on the first end face of the roller. On one hand, the roller wheel drives the sealing outer ring to rotate when rolling, the elastic sealing lip enables the sealing inner ring and the sealing outer ring which move mutually to contact with each other under the action of self elasticity, so that no gap exists between the sealing inner ring and the sealing outer ring, and the first end face of the roller wheel has good waterproof and dustproof effects; on the other hand, the second end terminal surface of gyro wheel is equipped with sealed lid, and the elasticity flange of sealed lid closely contradicts the cooperation with the pore wall in shaft hole to the second end terminal surface that realizes the gyro wheel has good waterproof dustproof effect. Therefore, the waterproof and dustproof effect can be improved, the service life is prolonged, and the maintenance cost is reduced.

Description

Escalator and waterproof and dustproof roller assembly

Technical Field

The invention relates to the technical field of escalators, in particular to an escalator and a waterproof and dustproof roller assembly.

Background

Escalators are widely used in public places such as shopping malls, office buildings, rail transit and the like, and outdoor escalators are also widely used. In the escalator, the idler wheel is arranged on the wheel shaft, and the idler wheel needs to rotate relative to the wheel shaft, so that in the actual use process, external water and dust easily enter the matching part of the idler wheel and the wheel shaft to influence the matching between the idler wheel and the wheel shaft.

In order to avoid the defect, the waterproof and dustproof structure adopted by most of the existing escalators is provided with a labyrinth waterproof and dustproof structure at the matching position of the roller and the wheel shaft, the structure is a non-contact type sealing structure, gaps exist between parts moving relatively, and the waterproof and dustproof effect is not ideal under the outdoor environment with more dust and moist environment.

Disclosure of Invention

Based on this, it is necessary to overcome the defects of the prior art, and to provide an escalator and a waterproof and dustproof roller assembly, which can improve the waterproof and dustproof effect, prolong the service life and reduce the maintenance cost.

The technical scheme is as follows: a waterproof and dustproof roller assembly comprising: the wheel shaft penetrates through a shaft hole of the wheel, and the bearing is sleeved on the wheel shaft and positioned at the shaft hole; the sealing inner ring is sleeved on the wheel shaft, and the sealing outer ring is sleeved on the first end face of the roller; the elastic sealing lip is arranged on one part of the sealing inner ring and the sealing outer ring, and the sealing inner ring is in rotatable contact fit with the other part of the sealing outer ring and the elastic sealing lip; and the sealing cover is arranged on the second end face of the roller, the sealing cover is provided with a circumferential elastic flange, and the elastic flange is tightly abutted and matched with the hole wall of the shaft hole.

On one hand, the waterproof and dustproof roller assembly drives the sealing outer ring to rotate when the roller rolls, the elastic sealing lip enables the sealing inner ring and the sealing outer ring which move mutually to contact with each other under the action of the elasticity of the elastic sealing lip, so that no gap exists between the sealing inner ring and the sealing outer ring, and the first end face of the roller has good waterproof and dustproof effects; on the other hand, the second end terminal surface of gyro wheel is equipped with sealed lid, and the elasticity flange of sealed lid closely contradicts the cooperation with the pore wall in shaft hole to the second end terminal surface that realizes the gyro wheel has good waterproof dustproof effect. Therefore, the waterproof and dustproof effect can be improved, the service life is prolonged, and the maintenance cost is reduced.

In one embodiment, a first recess adapted to the elastic flange is formed on a hole wall of the shaft hole, and the elastic flange is disposed in the first recess.

In one embodiment, the sealing cap is an elastomeric sealing cap; the elastic flange is arranged obliquely relative to the plate surface of the elastic sealing cover.

In one embodiment, the sealing inner ring comprises a sleeve body sleeved on the wheel shaft and a first sealing plate circumferentially arranged around the outer wall of the sleeve body, the sealing outer ring comprises a skeleton plate circumferentially arranged on the wheel shaft, the elastic sealing lip is arranged on the skeleton plate, the skeleton plate is arranged on the hole wall of the shaft hole, and the elastic sealing lip is arranged circumferentially around the wheel shaft; the elastic sealing lip comprises a first lip body and a second lip body, the first lip body is in interference fit with the outer wall of the sleeve body, the second lip body is in interference fit with the first sealing plate, and the first lip body, the second lip body, the first sealing plate and the sleeve body form a first cavity in a surrounding mode.

In one embodiment, the elastic sealing lip further includes a third lip body, the third lip body is in interference fit with the first sealing plate, and the second lip body, the third lip body and the first sealing plate enclose a second cavity.

In one embodiment, the waterproof and dustproof roller assembly further comprises a bag body detachably sleeved on the skeleton plate, and the first lip body, the second lip body and the third lip body are all connected with the bag body; the utricule is the elasticity utricule, the utricule with the pore wall in shaft hole closely contradicts the cooperation.

In one embodiment, a circumferential protrusion is arranged on the outer wall of the bag body, a second recess corresponding to the protrusion is arranged on the hole wall of the shaft hole, and the protrusion is arranged in the second recess.

In one embodiment, the first sealing plate is closer to the sealing cover than the skeleton plate; the first sealing plate comprises a first annular plate and a second annular plate, the inner edge of the first annular plate is connected with the outer wall of the sleeve body, and the second annular plate is connected with the outer edge of the first annular plate; the skeleton plate comprises a third annular plate and a fourth annular plate, the outer edge of the third annular plate is connected with the fourth annular plate, the third annular plate is arranged opposite to the first annular plate, and the fourth annular plate is positioned on the periphery of the second annular plate; the second lip body is abutted against the first annular plate, and the third lip body is abutted against the second annular plate.

In one embodiment, the sleeve body is in interference fit with the axle; the sleeve body protrudes to the outside of the sealing outer ring.

The escalator comprises the waterproof and dustproof roller assembly.

According to the escalator, on one hand, the roller drives the sealing outer ring to rotate when rolling, the elastic sealing lip enables the sealing inner ring and the sealing outer ring which move mutually to contact with each other under the action of the elasticity of the elastic sealing lip, so that no gap exists between the sealing inner ring and the sealing outer ring, and the first end face of the roller has good waterproof and dustproof effects; on the other hand, the second end terminal surface of gyro wheel is equipped with sealed lid, and the elasticity flange of sealed lid closely contradicts the cooperation with the pore wall in shaft hole to the second end terminal surface that realizes the gyro wheel has good waterproof dustproof effect. Therefore, the waterproof and dustproof effect can be improved, the service life is prolonged, and the maintenance cost is reduced.

Drawings

Fig. 1 is a schematic structural diagram of a waterproof and dustproof roller assembly according to an embodiment of the present invention;

FIG. 2 is an enlarged schematic view of FIG. 1 at A;

fig. 3 is a schematic structural diagram of a waterproof and dustproof roller assembly according to another embodiment of the present invention.

Reference numerals:

10. a roller; 11. a shaft hole; 12. a first recess; 13. a second recess; 20. a wheel axle; 30. a bearing; 40. sealing the inner ring; 41. a sleeve body; 42. a first sealing plate; 421. a first annular plate; 422. a second annular plate; 50. sealing the outer ring; 51. a framework plate; 511. a third annular plate; 512. a fourth annular plate; 60. an elastic sealing lip; 61. a first lip body; 62. a second lip body; 63. a third lip body; 64. a capsule body; 641. a protrusion; 70. a sealing cover; 71. an elastic flange; 81. a first chamber; 82. a second chamber.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

In the description of the present invention, it is to be understood that the terms "first", "second" and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the description of the present invention, it should be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. In contrast, when an element is referred to as being "directly connected" to another element, there are no intervening elements present.

In one embodiment, referring to fig. 1 and 2, a waterproof and dustproof roller assembly includes: the roller comprises a roller 10, a wheel shaft 20, a bearing 30, a sealing inner ring 40, a sealing outer ring 50, an elastic sealing lip 60 and a sealing cover 70. The axle 20 passes through the axle hole 11 of the roller 10, and the bearing 30 is sleeved on the axle 20 and located at the axle hole 11. The sealing inner ring 40 is sleeved on the wheel shaft 20, and the sealing outer ring 50 is sleeved on the first end face of the roller 10. The elastic sealing lip 60 is arranged on one part of the sealing inner ring 40 and the sealing outer ring 50, and the sealing inner ring 40 is matched with the other part of the sealing outer ring 50 and the elastic sealing lip 60 in a rotatable contact mode. The sealing cover 70 is disposed on the second end surface of the roller 10, the sealing cover 70 is provided with a circumferential elastic flange 71, and the elastic flange 71 is tightly abutted with the hole wall of the shaft hole 11.

On one hand, in the waterproof and dustproof roller assembly, when the roller 10 rolls, the outer sealing ring 50 is driven to rotate, the elastic sealing lip 60 enables the inner sealing ring 40 and the outer sealing ring 50 which move mutually to contact with each other under the action of self elasticity, so that no gap exists between the inner sealing ring 40 and the outer sealing ring 50, and the first end face of the roller 10 has good waterproof and dustproof effects; on the other hand, the second end surface of the roller 10 is provided with a sealing cover 70, and the elastic flange 71 of the sealing cover 70 is tightly abutted and matched with the hole wall of the shaft hole 11, so that the second end surface of the roller 10 has good waterproof and dustproof functions. Therefore, the waterproof and dustproof effect can be improved, the service life is prolonged, and the maintenance cost is reduced.

Further, referring to fig. 1 and fig. 2, a first concave portion 12 corresponding to the elastic flange 71 is disposed on a hole wall of the shaft hole 11, and the elastic flange 71 is disposed in the first concave portion 12. So, on the one hand, can realize better sealed effect, on the other hand, elastic flange 71 is located and is played limiting displacement in first concave part 12, avoids sealed lid 70 to break away from the second end of gyro wheel 10, guarantees structural stability.

Further, referring to fig. 1 and 2, the sealing cover 70 is an elastic sealing cover 70. Thus, the sealing cover 70 is easily installed in the shaft hole 11 of the roller 10, can achieve good sealing performance, has good stability in the roller 10, and is not easily detached. Specifically, the elastic flange 71 is provided to be inclined with respect to the plate surface of the elastic sealing cover 70. Thus, the seal cover 70 has a bow-shaped axial cross section, can be stably mounted in the shaft hole 11, is less likely to fall off, and has good sealing properties.

Further, referring to fig. 1 and 2, the seal inner ring 40 includes a sleeve body 41 sleeved on the axle 20 and a first seal plate 42 circumferentially disposed around an outer wall of the sleeve body 41. The seal outer ring 50 includes a frame plate 51 wound around the wheel axle 20, the elastic seal lip 60 is disposed on the frame plate 51, the frame plate 51 is mounted on a hole wall of the shaft hole 11, and the elastic seal lip 60 is disposed around the circumference of the wheel axle 20. The elastic sealing lip 60 includes a first lip body 61 and a second lip body 62. The first lip body 61 is in interference fit with the outer wall of the sleeve body 41, the second lip body 62 is in interference fit with the first sealing plate 42, and the first lip body 61, the second lip body 62, the first sealing plate 42 and the sleeve body 41 enclose a first cavity 81.

In one embodiment, referring to fig. 1 and 2, the elastic sealing lip 60 further includes a third lip body 63. The third lip 63 is in interference fit with the first sealing plate 42, and the second lip 62, the third lip 63 and the first sealing plate 42 enclose a second chamber 82. Thus, the first chamber 81 and the second chamber 82 both have good sealing effect, so that the waterproof and dustproof effects of the first end face of the roller 10 are better.

Further, referring to fig. 1 and 2, the waterproof and dustproof roller assembly further includes a bag 64 detachably sleeved on the skeleton plate 51. The first lip body 61, the second lip body 62 and the third lip body 63 are connected to the bladder body 64. The capsule 64 is an elastic capsule 64, and the capsule 64 is tightly abutted and matched with the hole wall of the shaft hole 11. Therefore, on one hand, better sealing performance can be ensured when the bag body 64 is tightly abutted against the hole wall of the shaft hole 11; on the other hand, the bag body 64, the first lip body 61, the second lip body 62 and the third lip body 63 are made of the same material, which is convenient for production and manufacture. Specifically, the bag 64, the first lip 61, the second lip 62, and the third lip 63 are integrally formed, for example, by injection molding, so that the production efficiency can be improved and the sealing performance can be ensured.

Further, referring to fig. 1 and 2, a circumferential protrusion 641 is disposed on an outer wall of the bladder 64. The hole wall of the shaft hole 11 is provided with a second concave portion 13 adapted to the protrusion 641, and the protrusion 641 is installed in the second concave portion 13. Thus, the bag 64 can be stably installed in the second recess 13 of the hole wall of the shaft hole 11, so that the sealing outer ring 50 can be stably installed on the hole wall of the shaft hole 11.

Further, referring to fig. 1 and 2, the first sealing plate 42 is closer to the sealing cover 70 than the frame plate 51. The first seal plate 42 includes a first annular plate 421 and a second annular plate 422. The inner edge of the first annular plate 421 is connected to the outer wall of the sleeve body 41, and the second annular plate 422 is connected to the outer edge of the first annular plate 421. Further, the skeleton plate 51 includes a third annular plate 511 and a fourth annular plate 512. The outer edge of the third annular plate 511 is connected to the fourth annular plate 512, the third annular plate 511 is opposite to the first annular plate 421, and the fourth annular plate 512 is located on the periphery of the second annular plate 422. The second lip 62 abuts against the first annular plate 421, and the third lip 63 abuts against the second annular plate 422.

In one embodiment, referring to fig. 3, the sleeve body 41 is in interference fit with the axle 20. The sheath body 41 protrudes outside the seal outer ring 50. Thus, the sealing performance between the sleeve body 41 and the wheel axle 20 is better. Further, the sleeve body 41 can position other components mounted on the wheel shaft 20 while protruding outside the seal outer 50. Of course, the length of the sleeve body 41 can also be located in the sealing outer ring 50, and the length of the sleeve body 41 can be set according to the needs, which is not described herein.

In one embodiment, an escalator comprises the waterproof and dustproof roller assembly in any one of the above embodiments.

On one hand, in the escalator, when the roller 10 rolls, the sealing outer ring 50 is driven to rotate, the elastic sealing lip 60 enables the sealing inner ring 40 and the sealing outer ring 50 which move mutually to contact with each other under the action of the elasticity of the elastic sealing lip 60, so that no gap exists between the sealing inner ring 40 and the sealing outer ring 50, and the first end face of the roller 10 has good waterproof and dustproof effects; on the other hand, the second end surface of the roller 10 is provided with a sealing cover 70, and the elastic flange 71 of the sealing cover 70 is tightly abutted and matched with the hole wall of the shaft hole 11, so that the second end surface of the roller 10 has good waterproof and dustproof functions. Therefore, the waterproof and dustproof effect can be improved, the service life is prolonged, and the maintenance cost is reduced.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. The utility model provides a waterproof dustproof roller assembly which characterized in that includes:

the wheel shaft penetrates through a shaft hole of the wheel, and the bearing is sleeved on the wheel shaft and positioned at the shaft hole;

the sealing inner ring is sleeved on the wheel shaft, and the sealing outer ring is sleeved on the first end face of the roller;

the elastic sealing lip is arranged on one part of the sealing inner ring and the sealing outer ring, and the sealing inner ring is in rotatable contact fit with the other part of the sealing outer ring and the elastic sealing lip; and

the sealing cover is arranged on the end face of the second end of the roller and provided with a circumferential elastic flange, and the elastic flange is tightly abutted and matched with the hole wall of the shaft hole;

the sealing inner ring comprises a sleeve body sleeved on the wheel shaft and a first sealing plate arranged around the outer wall of the sleeve body in the circumferential direction, the sealing outer ring comprises a framework plate arranged around the wheel shaft, the elastic sealing lip is arranged on the framework plate, the framework plate is arranged on the hole wall of the shaft hole, and the elastic sealing lip is arranged around the wheel shaft in the circumferential direction; the elastic sealing lip comprises a first lip body and a second lip body, the first lip body is in interference fit with the outer wall of the sleeve body, the second lip body is in interference fit with the first sealing plate, and the first lip body, the second lip body, the first sealing plate and the sleeve body enclose a first cavity;

the elastic sealing lip further comprises a bag body which is detachably sleeved on the framework plate, and the first lip body and the second lip body are connected with the bag body; the bag body is an elastic bag body, and the bag body is tightly matched with the hole wall of the shaft hole in an abutting mode; a circumferential bulge is arranged on the outer wall of the bag body, a second concave part matched with the bulge is arranged on the wall of the shaft hole, and the bulge is arranged in the second concave part; the first sealing plate is closer to the sealing cover than the skeleton plate; the first sealing plate comprises a first annular plate and a second annular plate, the inner edge of the first annular plate is connected with the outer wall of the sleeve body, and the second annular plate is connected with the outer edge of the first annular plate; the skeleton plate comprises a third annular plate and a fourth annular plate, the outer edge of the third annular plate is connected with the fourth annular plate, the third annular plate is arranged opposite to the first annular plate, and the fourth annular plate is positioned on the periphery of the second annular plate; the second lip body is abutted against the first annular plate.

2. The waterproof and dustproof roller assembly according to claim 1, wherein a first concave portion adapted to the elastic flange is provided on a hole wall of the shaft hole, and the elastic flange is provided in the first concave portion.

3. The waterproof and dustproof roller assembly of claim 1, wherein the sealing cover is an elastic sealing cover.

4. The waterproof and dustproof roller assembly of claim 1, wherein the elastic flanges are disposed obliquely with respect to a plate surface of the elastic sealing cover.

5. The waterproof and dustproof roller assembly of claim 1, wherein the elastic sealing lip further comprises a third lip body, the third lip body is in interference fit with the first sealing plate, and a second cavity is defined by the second lip body, the third lip body and the first sealing plate.

6. The waterproof and dustproof roller assembly according to claim 5, wherein the third lip body is connected to the capsule.

7. The waterproof and dustproof roller assembly of claim 6, wherein the sleeve body is in interference fit with the axle.

8. The waterproof and dustproof roller assembly of claim 6, wherein the third lip body abuts against the second annular plate.

9. The waterproof and dustproof roller assembly according to any one of claims 4 to 8, wherein the sleeve body protrudes to the outside of the seal outer ring.

10. An escalator, characterized in that it comprises a waterproof and dustproof roller assembly as claimed in any one of claims 1 to 9.