CN218289305U

CN218289305U - Multistage sealed rolling element

Info

Publication number: CN218289305U
Application number: CN202220898799.0U
Authority: CN
Inventors: 张晓峰; 马兰英; 亓鹏
Original assignee: Shandong Lingxiyuan Technology Development Co ltd
Current assignee: Shandong Lingxiyuan Technology Development Co ltd
Priority date: 2022-04-18
Filing date: 2022-04-18
Publication date: 2023-01-13
Anticipated expiration: 2032-04-18

Abstract

The application relates to the technical field of material conveying, in particular to a multi-stage sealed rolling body which comprises a shell, balls and an elastic sealing element. The shell is internally provided with an installation cavity, and the bottom wall of the installation cavity is provided with an installation hole; the ball is arranged in the mounting cavity, and part of the ball extends out of the mounting hole; elastic sealing element includes separable first sealing ring and second sealing ring, and first sealing ring and second sealing ring are installed in the installation cavity, and first sealing ring is close to the mounting hole, and the mounting hole is kept away from to the second sealing ring, first sealing ring of installation intracavity wall and ball surface centre gripping and second sealing ring. The rolling element of this application, its separable first sealing ring and second sealing ring form multistage sealed, moreover, first sealing ring and second sealing ring can have the difference to full play is respective function, thereby improves sealed effect.

Description

Multistage sealed rolling element

Technical Field

The application relates to the technical field of material conveying, in particular to a multi-stage sealing rolling body.

Background

The applicant has developed a rolling element comprising a housing and a ball mounted in the housing and having a bottom side partially protruding from the housing, the rolling element being capable of rolling movement by the ball. The rolling element can be applied to a material conveying device, for example, the rolling element can be applied to a scraper conveyor, the scraper conveyor is a conveying device for conveying coal and materials, generally, the scraper conveyor comprises a chain and a scraper arranged on the chain, the chain can drive the scraper to move along a chute, and the rolling element can be arranged at the bottom of the scraper so as to reduce the running resistance of the scraper. However, scraper conveyors are generally used in coal mines and other scenes with poor environmental cleanliness, and chutes generally contain impurities such as coal dust and sludge. The scraper blade is at the operation in-process, and impurity gets into in the shell easily, and the impurity of piling up in the shell can increase the running resistance of ball, makes the ball block even and is difficult to rotate.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the application provides a multi-stage sealing rolling body, a first sealing ring and a second sealing ring which can be separated form multi-stage sealing, and the first sealing ring and the second sealing ring can have difference so as to fully exert respective functions, thereby improving the sealing effect and effectively solving the problems existing in the prior art.

In order to solve the problems, the application provides a multi-stage sealed rolling body which comprises a shell, balls and an elastic sealing element. The shell is internally provided with an installation cavity, and the bottom wall of the installation cavity is provided with an installation hole; the ball is arranged in the mounting cavity, and part of the ball extends out of the mounting hole; elastic sealing element includes separable first sealing ring and second sealing ring, and first sealing ring and second sealing ring are installed in the installation cavity, and first sealing ring is close to the mounting hole, and the mounting hole is kept away from to the second sealing ring, first sealing ring of installation intracavity wall and ball surface centre gripping and second sealing ring.

Further, the first seal ring has a hardness greater than that of the second seal ring.

Further, the bottom of first sealing ring forms scrapes dirty portion, scrapes dirty portion and stretches into between mounting hole pore wall and the ball.

Further, the side of the dirt scraping part, which faces away from the ball, extends downwards towards the ball in a downward inclined mode.

Further, the inner side surface of the first sealing ring is attached to the ball, and an annular cavity is formed between the inner side of the second sealing ring and the outer surface of the ball.

Furthermore, the top of the first sealing ring abuts against the bottom of the second sealing ring.

Furthermore, the elastic sealing element also comprises an elastic ring which is abutted against the first sealing ring and the second sealing ring, and the inner wall of the mounting cavity supports the elastic ring.

Furthermore, the elastic rings are provided with a plurality of elastic rings, at least one elastic ring abuts against the first sealing ring, and at least one elastic ring abuts against the second sealing ring.

Furthermore, the top of the first sealing ring extends towards the direction away from the ball to form a supporting part, the supporting part supports the second sealing ring, and the elastic ring abuts against the supporting part.

Furthermore, the first sealing ring is a polytetrafluoroethylene sealing ring, and the second sealing ring is a polyurethane sealing ring.

The beneficial effects of this application lie in, the first sealing ring of installation intracavity wall and the first sealing ring of ball surface centre gripping is sealed in order to form first order, can reduce external impurity and get into the installation intracavity by the mounting hole, and in addition, the impurity of ball surface can be scraped to first sealing ring to reduce impurity and bring into the installation intracavity by the ball. The installation intracavity wall and ball surface centre gripping second sealing ring are sealed in order to form the second level, can further improve sealed effect, reduce impurity and get into the installation intracavity. Particularly, the first sealing ring and the second sealing ring can be separated and have differences, specifically, materials of the first sealing ring and the second sealing ring can be selected according to needs, and structures of the first sealing ring and the second sealing ring can be designed respectively, so that the first sealing ring and the second sealing ring can fully exert respective functions. Moreover, the first sealing ring and the second sealing ring can be flexibly arranged in the mounting cavity, so that the matching degree of the first sealing ring and the second sealing ring with the balls is improved, and the sealing reliability is improved. The multi-stage sealed rolling element of the application effectively solves the problems existing in the prior art.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:

fig. 1 is a schematic perspective view of a rolling element in an embodiment of the present application.

Fig. 2 is a front view of a rolling element according to an embodiment of the present application.

Fig. 3 is a schematic cross-sectional structure diagram of a rolling element in an embodiment of the present application.

Fig. 4 is a schematic cross-sectional structural view of a rolling body in another embodiment of the present application.

Wherein: 1. a housing; 11. a mounting cavity; 12. mounting holes; 2. a ball bearing; 3. an elastomeric seal; 31. a first seal ring; 311. a dirt scraping part; 312. a support portion; 32. a second seal ring; 321. an annular cavity; 33. an elastic ring.

Detailed Description

In order to more clearly explain the overall concept of the present application, the following detailed description is given by way of example in conjunction with the accompanying drawings.

It should be noted that in the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application, however, the present application may be practiced in other ways than those described herein, and thus the scope of the present application is not limited by the specific embodiments disclosed below.

In addition, in the description of the present application, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", and the like, indicate orientations and positional relationships based on those shown in the drawings, are only for convenience of description and simplicity of description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present application.

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and encompass, for example, both fixed and removable connections or integral parts thereof; either directly or indirectly through intervening media, either internally or in any other relationship. However, the direct connection means that the two bodies are connected without a connection relationship by an excessive structure and are connected to each other only by the connection structure to form a whole. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as the case may be.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. In the description herein, reference to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

In the present application, as shown in fig. 1 to 4, a multi-stage sealed rolling body is provided, including a housing 1, balls 2, and an elastic seal 3. The shell 1 is internally provided with a mounting cavity 11, and the bottom wall of the mounting cavity 11 is provided with a mounting hole 12; the ball 2 is arranged in the mounting cavity 11, and part of the ball 2 extends out of the mounting hole 12; the elastic sealing element 3 comprises a first sealing ring 31 and a second sealing ring 32 which can be separated, the first sealing ring 31 and the second sealing ring 32 are arranged in the installation cavity 11, the first sealing ring 31 is close to the installation hole 12, the second sealing ring 32 is far away from the installation hole 12, and the first sealing ring 31 and the second sealing ring 32 are clamped by the inner wall of the installation cavity 11 and the outer surface of the ball 2.

The utility model provides a rolling element, the first sealing ring 31 of 11 inner walls of installation cavity and 2 surface centre gripping of ball is sealed in order to form first order, can reduce external impurity and get into installation cavity 11 by mounting hole 12 in, moreover, ball 2 is when installation cavity 11 rolls, the part that ball 2 stretches out mounting hole 12 is attached to external impurity easily, ball 2 is at rolling in-process, the impurity that 2 surfaces of ball can be struck off to the first sealing ring 31 that is close to mounting hole 12, in order to reduce impurity and bring into installation cavity 11 by ball 2. Installation cavity 11 inner wall and ball 2 surface centre gripping second sealing ring 32 are sealed in order to form the second level, can further improve sealed effect, reduce in impurity gets into installation cavity 11.

Particularly, the first sealing ring 31 and the second sealing ring 32 are separable, and the first sealing ring 31 and the second sealing ring 32 can have differences, specifically, the materials of the first sealing ring 31 and the second sealing ring 32 can be selected according to requirements, and the structures of the first sealing ring 31 and the second sealing ring 32 can be designed respectively, so that the first sealing ring 31 and the second sealing ring 32 can fully exert respective functions. Moreover, the first sealing ring 31 and the second sealing ring 32 can be flexibly arranged in the mounting cavity 11, so that the matching degree of the first sealing ring 31 and the second sealing ring 32 with the ball 2 is improved, and the sealing reliability is further improved.

In a preferred embodiment, the first sealing ring 31 is further characterized by a hardness greater than that of the second sealing ring 32. The first seal ring 31 is adjacent to the mounting hole 12, and it is more likely to directly contact foreign matters from the outside and to rub against the foreign matters from the outside. The hardness of the first sealing ring 31 of increase is favorable to improving the wear resistance of first sealing ring 31 to reduce the wearing and tearing of first sealing ring 31, prolong the life of first sealing ring 31, make first sealing ring 31 can more effective butt in ball 2, reduce impurity entering between ball 2 and the first sealing ring 31. Moreover, the hardness of the first sealing ring 31 is high, so that the effect of scraping off impurities on the outer surface of the ball 2 can be improved, and the impurities brought into the mounting cavity 11 by the ball 2 can be further reduced. Second sealing ring 32 keeps away from mounting hole 12, and the external impurity of direct contact is difficult for, and its self hardness is less than first sealing ring 31, is favorable to improving second sealing ring 32's elasticity, and second sealing ring 32 can be inseparabler laminating in ball 2 to reduce in impurity gets into installation cavity 11.

More specifically, the bottom of the first sealing ring 31 forms a scraping part 311, and the scraping part 311 extends between the hole wall of the mounting hole 12 and the ball 2. When the ball 2 rolls, the dirt scraping part 311 can scrape off impurities on the outer surface of the ball 2 at the mounting hole 12, the phenomenon of impurity blockage at the mounting hole 12 is reduced, and the impurities are further reduced to enter the mounting cavity 11. In addition, the dirt scraping part 311 can restrain the ball 2 in the transverse direction, prevent the ball 2 from directly impacting the hole wall of the mounting hole 12 in the operation process, and buffer the impact force of the ball 2 on the shell 1. Moreover, when the ball 2 rotates at the mounting hole 12, the wear-resistant ring can prevent the ball 2 from directly rubbing against the hole wall of the mounting hole 12, and reduce the wear of the hole wall of the mounting hole 12.

More specifically, the side of the dirt scraping portion 311 facing away from the ball 2 extends obliquely downward toward the ball 2. As shown in the figure, the end of scraping the dirty portion 311 is more sharp, is favorable to scraping the impurity of ball 2 surface down, improves the effect of scraping dirty and scraping ball 2 surface impurity. Especially for the highly adhering foreign substances, the end of the dirt-scraping portion 311 is more likely to scrape it off from the outer surface of the ball 2.

In the preferred embodiment, more specifically, the inner side of the first sealing ring 31 is engaged with the ball 2, and an annular cavity 321 is formed between the inner side of the second sealing ring 32 and the outer surface of the ball 2. Since the first seal ring 31 is close to the mounting hole 12 and the inner side surface of the first seal ring 31 is fitted to the ball 2, the gap between the first seal ring 31 and the ball 2 can be reduced, and the entry of impurities from the mounting hole 12 to the gap between the first seal ring 31 and the ball 2 can be reduced. The second seal ring 32 is far from the mounting hole 12, and impurities are not easy to enter between the second seal ring 32 and the ball 2 under the sealing action of the first seal ring 31. An annular cavity 321 is formed between the inner side of the second sealing ring 32 and the outer surface of the ball 2, the contact area between the second sealing ring 32 and the ball 2 is reduced, and the resistance of the second sealing ring 32 to the rolling of the ball 2 can be reduced on the premise of realizing sealing.

In the preferred embodiment, more specifically, the top of the first sealing ring 31 abuts against the bottom of the second sealing ring 32. First sealing ring 31 butt in second sealing ring 32, both support each other, can improve the stability of first sealing ring 31 and second sealing ring 32 mounted position in vertical direction, prevent first sealing ring 31 and second sealing ring 32 shift position in vertical direction, improve the reliability of first sealing ring 31 and second sealing ring 32 butt in ball 2, improve sealed effect. Furthermore, the first seal ring 31 and the second seal ring 32 are in contact with each other, so that the entry of foreign matters between the first seal ring 31 and the second seal ring 32 can be reduced, the accumulation of foreign matters can be prevented, and the resistance of the foreign matters to the rolling of the ball 2 can be reduced.

In the preferred embodiment, more specifically, the elastic sealing member 3 further includes an elastic ring 33, the elastic ring 33 abuts against the first sealing ring 31 and the second sealing ring 32, and the elastic ring 33 is supported by the inner wall of the mounting cavity 11.

Under the elastic force of the elastic ring 33, the first sealing ring 31 and the second sealing ring 32 can be tightly attached to the ball 2, so that the gaps between the first sealing ring 31 and the second sealing ring 32 and the outer surface of the ball 2 are further reduced, and the first sealing ring 31 is favorable for scraping impurities on the outer surface of the ball 2. In addition, the ball 2 is in the rolling process, the first sealing ring 31 and the second sealing ring 32 continuously rub with the ball 2, after long-time use, the first sealing ring 31 and the second sealing ring 32 have certain degree of loss, resulting in gaps between the first sealing ring 31 and the second sealing ring 32 and the ball 2, and the elastic ring 33 can clamp the first sealing ring 31 and the second sealing ring 32 on the ball 2 through elastic deformation thereof, so as to compensate the first sealing ring 31 and the second sealing ring 32, reduce the gaps between the first sealing ring 31 and the second sealing ring 32 and the ball 2, improve the sealing performance, prolong the service life of the first sealing ring 31 and the second sealing ring 32, and reduce the replacement times.

More specifically, the plurality of elastic rings 33 are provided, at least one elastic ring 33 abuts against the first seal ring 31, and at least one elastic ring 33 abuts against the second seal ring 32.

The plurality of elastic rings 33 can independently act on the first seal ring 31 and the second seal ring 32, respectively, and can compensate for the wear of the first seal ring 31 and the second seal ring 32, respectively, thereby improving the effect of the elastic rings 33 in compensating for the first seal ring 31 and the second seal ring 32. Specifically, when the wear degree of the first sealing ring 31 is greater than that of the second sealing ring 32, the deformation amount of the elastic ring 33 compensated by the first sealing ring 31 needs to be greater than that compensated by the second sealing ring 32, and the elastic rings 33 abutted by the first sealing ring 31 and the second sealing ring 32 can be independently deformed, so that the elastic rings 33 are not easily restricted with each other, and the elastic rings 33 abutted by the first sealing ring 31 can be sufficiently deformed to satisfy the compensation amount of the first sealing ring 31. This is also true when the degree of wear of the second seal ring 32 is greater than the degree of wear of the first seal ring 31.

More specifically, the top of the first sealing ring 31 extends in a direction away from the ball 2 to form a supporting portion 312, the supporting portion 312 supports the second sealing ring 32, and the elastic ring 33 abuts against the supporting portion 312. The elastic ring 33 can press the support portion 312 against the second seal ring 32, and improve the stability of the first seal ring 31 and the second seal ring 32 in supporting each other.

In a preferred embodiment, the first sealing ring 31 is a teflon sealing ring, and the second sealing ring 32 is a polyurethane sealing ring. The polytetrafluoroethylene sealing ring has good wear resistance, long service life, low friction coefficient and small resistance to the running of the ball 2. In addition, the polytetrafluoroethylene sealing ring is high-temperature resistant, and when the ball 2 and the polytetrafluoroethylene sealing ring generate heat through friction, the polytetrafluoroethylene sealing ring is not easy to be damaged by heat. Polyurethane sealing ring resilience is good, can closely laminate in ball 2, and polyurethane sealing ring thermal-insulated effectual moreover, can reduce heat transfer to polyurethane wear ring has good damping performance, can improve the stability of 2 operations of ball.

In the present application, the material of the elastic ring 33 is not limited, and for example, the elastic ring 33 is made of silicone.

The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, for the system embodiment, since it is substantially similar to the method embodiment, the description is simple, and for the relevant points, reference may be made to the partial description of the method embodiment.

The above description is only an example of the present application and is not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims

1. A multi-stage sealed rolling body, comprising:

the mounting structure comprises a shell, a mounting hole and a positioning pin, wherein a mounting cavity is formed in the shell, and the bottom wall of the mounting cavity is provided with the mounting hole;

the ball is arranged in the mounting cavity, and part of the ball extends out of the mounting hole;

elastic seal spare, elastic seal spare includes separable first sealing ring and second sealing ring, first sealing ring with the second sealing ring install in the installation cavity, first sealing ring is close to the mounting hole, the second sealing ring is kept away from the mounting hole, installation intracavity wall with ball surface centre gripping first sealing ring with the second sealing ring.

2. The multi-sealed rolling element of claim 1, wherein the first seal ring has a hardness greater than the second seal ring.

3. The rolling element of claim 2, wherein the bottom of the first sealing ring forms a wiper that extends between the wall of the mounting bore and the balls.

4. The multi-sealed rolling element of claim 3, wherein the side of the wiper facing away from the ball extends obliquely downwards towards the ball.

5. The multi-seal rolling element of claim 1, wherein an inner side surface of said first seal ring is fitted to said balls, and an annular cavity is formed between an inner side of said second seal ring and an outer surface of said balls.

6. The multi-sealed rolling element of claim 1, wherein a top portion of the first seal ring abuts a bottom portion of the second seal ring.

7. The multi-stage sealed rolling element according to any one of claims 1 to 6, wherein the elastic seal further comprises an elastic ring abutting against the first seal ring and the second seal ring, and the elastic ring is supported by the inner wall of the mounting cavity.

8. The rolling element of claim 7, wherein a plurality of elastic rings are provided, at least one elastic ring abuts against the first sealing ring, and at least one elastic ring abuts against the second sealing ring.

9. The rolling element of claim 8, wherein the top of the first sealing ring extends away from the balls to form a support portion, the support portion supports the second sealing ring, and the elastic ring abuts against the support portion.

10. The multi-stage sealed rolling element of claim 2, wherein the first seal ring is a teflon seal ring and the second seal ring is a polyurethane seal ring.