CN218318896U

CN218318896U - Rolling element with good sealing performance

Info

Publication number: CN218318896U
Application number: CN202221438198.8U
Authority: CN
Inventors: 张晓峰; 马兰英; 亓鹏
Original assignee: Shandong Xiniu High Molecular Material Co ltd
Current assignee: Shandong Xiniu High Molecular Material Co ltd
Priority date: 2022-06-09
Filing date: 2022-06-09
Publication date: 2023-01-17
Anticipated expiration: 2032-06-09

Abstract

The utility model provides a rolling element that leakproofness is good, include: the mounting structure comprises a shell, a mounting cavity and a mounting hole, wherein the mounting cavity is formed in the shell and is provided with a mounting hole, the mounting hole is communicated with the mounting cavity, the mounting cavity comprises a sealing area, and the sealing area is close to the mounting hole; the ball is arranged in the mounting cavity, and part of the ball extends out of the mounting hole; the low-elasticity wear-resistant part is arranged in the sealing area, surrounds the outer side of the ball and is abutted against the surface of the ball; high-elastic sealing washer, high-elastic sealing washer set up in the sealing area to keep away from one side butt of mounting hole with low elasticity wearing parts, high-elastic sealing washer inboard and ball surface butt. It constitutes twice sealed line of defence through low elasticity wearing parts and high-elastic sealing washer jointly, and the great stereoplasm granule of adhesion on the ball or other impurity strike off it through low elasticity wearing parts in the rotatory process of ball to further clear up the ball surface through high-elastic sealing washer, get rid of and adhere to tiny particle impurity such as tiny dust, mud on it.

Description

Rolling element with good sealing performance

Technical Field

The application belongs to the technical field of relate to the material is carried, especially relates to a rolling element that leakproofness is good.

Background

At present, the existing rolling element generally comprises a shell and a ball, wherein the shell forms a mounting cavity, the ball is mounted in the mounting cavity, and part of the ball extends out of the bottom side of the shell and can roll in the mounting cavity. The rolling element can be used for material conveyor to reduce the resistance of material conveyor operation, for example the rolling element can be applied to scraper conveyor, scraper conveyor is the conveyor of transport coal and material, includes the chain and installs the scraper blade on the chain usually, and the chain can drive the scraper blade and slide along the chute. However, the scraper conveyor is usually used in a coal mine and other scenes with poor environmental cleanliness, and the chute usually contains impurities such as coal dust, sludge and the like. In the operation process of the scraper, impurities easily enter a shell of the rolling body, the impurities accumulated in the installation cavity can increase the operation resistance of the ball, and even the ball is clamped in the shell and is difficult to rotate.

SUMMERY OF THE UTILITY MODEL

The utility model provides a rolling element that leakproofness is good, low bullet wearing parts and high-elastic sealing washer constitute the sealed line of defence of twice jointly, great stereoplasm granule or other impurity of adhesion on the ball, strike off it through low bullet wearing parts at the rotatory in-process of ball, reduce the possibility that impurity such as stereoplasm granule got into the sealing land, and it is great through elasticity, can go forward further clearance to the ball surface with the high-elastic sealing washer that the ball surface closely laminated, get rid of the tiny dust that adheres to on it, tiny particle impurity such as mud, the sealing performance of rolling element has been improved on the bigger degree, realize multiple protection to the ball, reduce the rolling element and store up the emergence of the condition such as the excessive and take place vibration or inhomogeneous roll because of impurity in the installation cavity in the course of the work, prolong the life of rolling element.

In order to solve the above problem, the utility model provides a rolling element that leakproofness is good, include: the mounting structure comprises a shell, a mounting cavity and a mounting hole, wherein the mounting cavity is formed in the shell and is communicated with the mounting hole, the mounting cavity comprises a sealing area, and the sealing area is close to the mounting hole; the ball is arranged in the mounting cavity, and part of the ball extends out of the mounting hole; the low-elasticity wear-resistant part is arranged in the sealing area, surrounds the outer side of the ball and is abutted against the surface of the ball; high-elastic sealing washer, high-elastic sealing washer set up in the sealing area to keep away from one side butt of mounting hole with low elasticity wearing parts, high-elastic sealing washer inboard and ball surface butt.

Further, high-elastic sealing washer is provided with dustproof lip portion and sealed lip portion, dustproof lip portion and sealed lip portion in proper order with ball surface butt, sealed lip portion encloses to be equipped with elastic fastener so that sealed lip portion laminates in the ball surface.

Further, high-elastic sealing washer is provided with including cooperation portion, and cooperation portion supports and leans on in the shell, and cooperation portion connects and supports dustproof lip and sealed lip to make dustproof lip and sealed lip all with ball surface butt, be provided with installation space between cooperation portion and the sealed lip, elastic fastener is from the tight spring, and from the tight spring setting in installation space, and encircle in the outside of sealed lip.

Furthermore, the dustproof lip portion and the sealing lip portion are both provided with lip end portions which are in inclined wedge shapes and are abutted to the surfaces of the balls.

Further, the dust lip is arranged on one side close to the low-elasticity wear-resistant part.

Further, an accommodating space is arranged between the dustproof lip portion and the low-elasticity wear-resistant part.

Further, the low elasticity wear-resisting part is provided with partition portion and butt portion, and partition portion sets up between mounting hole and ball, butt portion and high-elastic sealing washer butt, partition portion and butt portion all with ball surface butt.

Furthermore, be provided with the elastic ring between shell and the low elasticity wearing parts, butt portion sets up between elastic ring and high-elastic sealing ring, and the low elasticity wearing parts of elastic ring extrusion.

Further, the installation cavity lateral wall has the first annular muscle of inside extension, and first annular muscle separates the installation cavity for sealing area and rolling district, and high-elastic sealing washer leans on in first annular muscle.

Further, the shell includes shell body and the annular bottom of being connected with the shell body cooperation, and the annular bottom is provided with the mounting hole, and annular bottom is formed with the second annular muscle to sealing area inside, and the second annular muscle extends to low elasticity wearing parts department or contacts with first annular muscle.

The beneficial effects of the utility model reside in that, low bullet wearing parts and high-elastic sealing washer constitute the sealed line of defence of twice jointly, great stereoplasm granule or other impurity of adhesion on the ball, strike off it through low bullet wearing parts at the rotatory in-process of ball, reduce the possibility that impurity such as stereoplasm granule gets into the sealing zone, and it is great through elasticity, can go forward further clearance to the ball surface with the high-elastic sealing washer that the ball surface closely laminated, get rid of and adhere to tiny dust above that, tiny particle impurity such as mud, the sealing performance of rolling element has been improved to the bigger degree, realize multiple protection to the ball, reduce the rolling element and store up the emergence of the condition such as impurity too much and take place vibration or inhomogeneous roll because of the installation cavity in the course of the work, prolong the life of rolling element, the effectual problem that has solved prior art and exist.

Drawings

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

fig. 1 is a schematic view of the sectional structure of the present invention.

Fig. 2 is a partially enlarged view of the embodiment shown in fig. 1 at a.

Fig. 3 is a schematic perspective view of the embodiment shown in fig. 1.

Fig. 4 is a schematic front sectional view of another embodiment of the present invention.

10, a shell; 101. a mounting cavity; 1011. a sealing region; 1012. a scrolling region; 102. mounting holes; 20. a ball bearing; 30. a low-resilience wear resistant member; 301. a partition portion; 302. an abutting portion; 303. an elastic ring; 40. a high-elastic sealing ring; 401. a dust lip; 402. a sealing lip; 403. a fitting portion; 404. an elastic fastener; 50. a first annular rib; 60. an annular bottom cover; 70. a second annular rib.

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.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.

In addition, in the description of the present invention, it should be understood that the terms "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be taken as limiting the present invention.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; the connection can be mechanical connection, electrical connection or communication; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. In the description of the present specification, reference to the description of "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" or the like 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 present invention. 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 invention, as shown in fig. 1 to 4, there is provided a rolling element having good sealing performance, comprising: the mounting structure comprises a shell 10, wherein a mounting cavity 101 is formed in the shell 10 and is provided with a mounting hole 102, the mounting hole 102 is communicated with the mounting cavity 101, the mounting cavity 101 comprises a sealing area 1011, and the sealing area 1011 is close to the mounting hole 102; the ball 20, the ball 20 is mounted in the mounting cavity 101, the ball 20 extends out of the mounting hole 102 partially; the low-elasticity wear-resistant part 30 is arranged in the sealing area 1011, the low-elasticity wear-resistant part 30 surrounds the outer side of the ball 20 and abuts against the surface of the ball 20; the high-elasticity sealing ring 40 is arranged in the sealing area 1011, the high-elasticity sealing ring 40 is abutted against one side, away from the mounting hole 102, of the low-elasticity wear-resistant part 30, and the inner side of the high-elasticity sealing ring 40 is abutted against the surface of the ball 20.

The inside installation cavity 101 that is provided with of shell 10, in installation and use, as shown in fig. 1, the shell 10 bottom is provided with mounting hole 102, mounting hole 102 and installation cavity 101 intercommunication, ball 20 is partly arranged in installation cavity 101, another part is outstanding from mounting hole 102, so that roll and conveying material, reduce the resistance that receives in the material transportation, sealing area 1011 sets up in the top of mounting hole 102, low elasticity wear-resisting part 30 is arranged in the below of being close to mounting hole 102, high-elastic sealing ring 40 is arranged in the top of low elasticity wear-resisting part 30, low elasticity wear-resisting part 30 encircles the outside at ball 20, low elasticity wear-resisting part 30 relies on its own elasticity and ball 20 surface butt, so that after its inboard and ball 20 wearing and tearing, still can be with ball 20 surface butt under the elastic force effect. The surface of the ball 20 outside the mounting hole 102 is easy to carry foreign particles and dust during operation, and as the ball 20 rotates, the low-elasticity wear-resistant part 30 has certain hardness, so that hard particles or other large-sized foreign matters can be scraped off, and the foreign matters naturally fall and are separated from the ball 20, thereby realizing a first sealing effect. The high-elastic sealing ring 40 has great elasticity, and its cover is established on ball 20 and is closely laminated with ball 20 surface, and when some small particle impurity such as tiny dust, mud that adhere to on ball 20 were not scraped by low elasticity wear-resisting piece 30, high-elastic sealing ring 40 can further get rid of small particle impurity, avoids impurity to remove to inside installation cavity 101 and add up in installation cavity 101 along with ball 20, has realized the sealed protection of second way of rolling element.

The utility model discloses a low bullet wearing parts 30 and high-elastic sealing washer 40 constitute the twice sealed line of defence jointly, great stereoplasm granule or other impurity are struck off it by the great low bullet wearing parts 30 of hardness, reduce the possibility that impurity such as stereoplasm granule got into sealing area 1011, moreover, low bullet wearing parts 30 fills the space between ball 20 and the mounting hole 102, can avoid external impurity to get into installation cavity 101 through the space between mounting hole 102 and the shell 10 in, the normal work of low bullet wearing parts 30 and high-elastic sealing washer 40 of influence. In addition, the high-elasticity sealing ring 40 which has larger elasticity and can be tightly attached to the surface of the ball 20 further cleans the surface of the ball 20 to remove small particle impurities such as fine dust, sludge and the like adhered to the surface of the ball, so that the sealing performance of the rolling body is improved to a greater extent, double protection is realized on the ball 20, the occurrence of the conditions that the rolling body vibrates or rolls unevenly and the like due to excessive impurities accumulated in the installation cavity 101 in the working process is reduced, the resistance of the ball 20 due to the impurities in the installation cavity 101 in the working process is reduced, and the service life of the rolling body is prolonged.

It should be further noted that, as shown in fig. 2, the high-elasticity sealing ring 40 is provided with a dust lip 401 and a sealing lip 402, the dust lip 401 and the sealing lip 402 are sequentially abutted against the surface of the ball 20, and the sealing lip 402 is surrounded by an elastic fastening member 404 to make the sealing lip 402 adhere to the surface of the ball 20. Dustproof lip portion 401 and sealed lip portion 402 set up the different height at high-elastic sealing ring 40 inboard, and both all with ball 20 surperficial butt, dustproof lip portion 401 relies on self elasticity laminating on ball 20 surface, and sealed lip portion 402 is not only through self elastic reaction, and its outside is provided with annular elastic fastener 404 moreover to provide the fastening force of sealed lip portion 402 circumference, increase sealed lip portion 402 to the laminating ability on ball 20 surface. In this way, the dustproof lip portion 401 can simply seal and prevent dust, the sealing lip portion 402 can scrape off dust on the surface of the ball 20 by increasing the extrusion force between the sealing lip portion 402 and the ball 20, and even if the ball 20 is influenced by uneven rolling or vibration, the sealing lip portion 402 and the surface of the ball 20 can still be kept in stable contact under the combined action of the sealing lip portion 402 and the elastic fastening piece 404, so that the high-elasticity sealing ring 40 has stable sealing effect. High-elastic sealing washer 40 self provides the dual dustproof guard wire, clears away the tiny dust on ball 20 surface, has reduced the possibility that impurity such as dust got into from between high-elastic sealing washer 40 and the ball 20 greatly to can adapt to different operating mode circumstances, provide tight dustproof protection, further improve the performance of rolling element, extension equipment life.

In the embodiment, the dustproof lip part and the sealing lip part can be made of the same material, or the dustproof lip part can be made of a plastic material with better elasticity, so that the dustproof lip part can be better attached to the ball, and can be continuously abutted against the surface of the ball by means of the elasticity of the dustproof lip part after being worn; since the sealing lip 402 needs to be more compliant against the ball than the dust lip, the sealing lip is made of a more wear resistant elastomeric material to improve its service life. The positional relationship in height between the dust lip and the seal lip is not limited in this embodiment. In addition, in the utility model discloses in, low elasticity wearing parts can select, are made for materials such as polytetrafluoroethylene, polyimide, polyamide imide or polyether ether ketone.

Preferably, as shown in fig. 1 and 2, the high-elasticity sealing ring 40 is provided with a fitting portion 403, the fitting portion 403 abuts against the housing 10, the fitting portion 403 connects and supports the dust lip 401 and the sealing lip 402, so that the dust lip 401 and the sealing lip 402 are both in surface abutment with the ball 20, an installation space is provided between the fitting portion 403 and the sealing lip 402, the elastic fastener 404 is a self-tightening spring, and the self-tightening spring is arranged in the installation space and surrounds the outer side of the sealing lip 402. The fitting part 403 may be an L-shaped or n-shaped structure, one side of the fitting part 403 abuts against the inner side wall of the housing 10, the dust lip 401 is connected with the sealing lip 402 and the other side of the fitting part 403 or the transverse part of the fitting part 403, a certain installation space is left between the fitting part 403 and the dust lip 401 and the sealing lip 402, thus the size of the high-elasticity sealing ring 40 is larger than the gap between the housing 10 and the ball 20 when the sealing ring is installed, and the fitting part 403 is pressed by the low-elasticity wear-resistant member 30, so that the fitting part 403 presses the sealing lip 402 and the dust lip 401 to one side of the ball 20 to provide certain elastic force for the sealing lip 402 and the dust lip 401, so that the sealing lip 402 and the dust lip 401 can be more closely attached to the surface of the ball 20, and the sealing lip 402 and the dust lip 401 can be pushed to move to one side of the ball 20 after being worn. And when the sealing lip 402 and the dustproof lip 401 receive large transverse force, the sealing lip 402 and the dustproof lip 401 can extend into the installation space to deform, so that the sealing lip 402 and the dustproof lip 401 are prevented from deforming due to excessive pressure, and cannot be well attached to the surface of the ball 20. The self-tightening spring is placed in the mounting space between the mating portion 403 and the sealing lip 402.

More specifically, as shown in fig. 2, the dust lip portion 401 and the seal lip portion 402 are each provided with a lip end portion which is wedge-shaped and abuts against the surface of the ball 20. The lip end is the part with ball 20 surface contact, the lip end of the inclined wedge better scrapes off the dust on the surface of ball 20 under the action of the same elastic force or extrusion force, and impurities such as dust are prevented from entering into the mounting cavity 101 above, so that a good sealing effect is provided, and the lip end of the inclined wedge can slowly increase the contact area between the lip end and the ball 20 under the action of extrusion force or self elastic force, and the dustproof lip 401 and the sealing lip 402 still can keep a relative horizontal state, so that the phenomenon that the sealing effect is influenced by the deformation or movement of the lip end and the inclined wedge is avoided.

In one embodiment, as shown in fig. 2 and 4, the dust lip 401 is disposed on a side adjacent to the low-resilience wear member 30. Corresponding seal lip 402 sets up in dustproof lip 401 top, leave certain space between seal lip 402 and the dustproof lip 401, with the dust of the scraping off of storage seal lip 402, if some little impurity particles can't be scraped off by the low elasticity wearing parts 30, then block most impurity particles by dustproof lip 401, more tiny particle is cleared up by the seal lip 402 of top, under the cooperation jointly of dustproof lip 401 and seal lip 402, dust removal effect to ball 20 is better like this, the guard action and the sealing performance of high-elastic sealing ring 40 have been improved.

Certainly, sealed lip also can set up in the one side that is close to the low bullet wearing parts, a large amount of tiny particle impurity strikes off by sealed lip like this, dustproof lip is responsible for the separation and is had the installation intracavity of the few part dust entering top, reduce the possibility in the space between dust entering sealed lip and the dustproof lip, if space between the two stores more dust and can influence subsequent dust removal effect, strike off most dust by sealed lip, reduce and store up the dust between sealed lip and the dustproof lip, can prolong the life of high-elastic sealing washer, reduce the clearance to high-elastic sealing washer. The dustproof lip needs to be made of a material with elasticity larger than that of the sealing lip so as to facilitate scraping of fine dust.

As a preferred embodiment, as shown in fig. 4, a receiving space is provided between the dust lip 401 and the low-resilience wear member 30. In order to facilitate the accommodation of the small-particle dust or the impurities on the surface of the ball 20 scraped by the dustproof lip 401, the abrasion of the impurities to the dustproof lip 401 is reduced, an accommodating space is arranged between the dustproof lip 401 and the low-elasticity wear-resistant part 30, the accommodating space can be selected to incline to one side inside the high-elasticity sealing ring 40, so that the scraped impurities slide to the inside of the accommodating space, and the scraped impurities can also act on the dustproof lip 401 equally, certain extrusion force is provided for the dustproof lip 401, and the dustproof lip 401 is more attached to the ball 20.

As shown in fig. 1 and 4, the low resilience wear resistant member 30 is provided with a partition portion 301 and an abutting portion 302, the partition portion 301 is provided between the mounting hole 102 and the ball 20, the abutting portion 302 abuts against the high resilience seal ring 40, and both the partition portion 301 and the abutting portion 302 abut against the surface of the ball 20. The space between the mounting hole 102 and the ball 20 is filled with the separating portion 301, the bottom of the separating portion 301 is flush with the bottom of the outer shell 10, the separating portion 301 is connected with the abutting portion 302, the outer shell 10 limits and restricts the separating portion 301 in the transverse direction, the abutting portion 302 receives downward extrusion force of the high-elasticity sealing ring 40 above the abutting portion 302, and transmits the pressure to the separating portion 301, so that the separating portion 301 and the abutting portion 302 are more attached to the ball 20, along with the rotation of the ball 20, the separating portion 301 firstly scrapes off large-particle impurities on the surface of the ball 20, and the impurities are prevented from entering the space between the low-elasticity wear-resistant piece 30 and the mounting cavity 101 through the mounting hole 102, and the working states of the low-elasticity wear-resistant piece 30 and the high-elasticity sealing ring 40 are squeezed or influenced, and the sealing of the rolling body is influenced.

Preferably, as shown in fig. 2 and 4, an elastic ring 303 is disposed between the housing 10 and the low-elasticity wear-resistant member 30, the abutting portion 302 is disposed between the elastic ring 303 and the high-elasticity sealing ring 40, and the elastic ring 303 presses the low-elasticity wear-resistant member 30. As shown in fig. 2, a certain gap is left between the abutting portion 302 and the separating portion 301, the elastic ring 303 presses the side wall of the high-elasticity sealing ring 40 in the transverse direction, the acting force of the separating portion 301 and the abutting portion 302 on the surface of the ball 20 can be increased, the abutting effect of the abutting portion 302 and the separating portion 301 on the surface of the ball 20 is improved, the abutting portion 302 is pressed above the elastic ring 303, the elastic ring can be continuously abutted on the high-elasticity sealing ring 40, after the inner side of the high-elasticity sealing ring 40 is worn, the elastic ring 303 can deform the high-elasticity sealing ring 40 through the acting force transmitted by the abutting portion 302, the inner side of the elastic ring 303 continuously moves towards the direction of the ball 20 and is attached to the surface of the ball 20, and the whole sealing performance is improved.

More specifically, as shown in fig. 1 and 4, the side wall of the mounting cavity 101 has a first annular rib 50 extending inward, the first annular rib 50 divides the mounting cavity 101 into a sealing area 1011 and a rolling area 1012, and the high-elasticity sealing ring 40 abuts against the first annular rib 50. The first annular rib 50 can limit the low elasticity wear-resistant member 30 and the high elasticity sealing ring 40 in the sealing area 1011 and prevent the high elasticity sealing ring 40 from moving towards the rolling area 1012, so that the low elasticity wear-resistant member 30 and the high elasticity sealing ring 40 can better contact with the surface of the balls 20 under the constraint of the bottom of the housing 10 and the first annular rib 50, and impurities can be reduced from entering the rolling area 1012 through the mounting hole 102. In addition, a support body matched with the balls 20 can be arranged in the rolling area 1012, a pit matched with the balls 20 is arranged at the bottom of the support body, the balls 20 roll relative to the pit, and a lubricating medium can be arranged in the rolling area 1012 to improve the rolling performance of the balls 20 relative to the support body. For example, a plurality of sub-balls may be provided between the dimples of the support and the balls 20, the sub-balls may abut on the dimples and roll relative to the dimples, and the balls 20 may abut on the sub-balls and roll relative to the sub-balls, so as to reduce rolling resistance between the balls 20 and the surfaces of the dimples, reduce wear of the balls 20 and the support, and prolong the service life.

It should be further noted that, as shown in fig. 1 and 3, the outer shell 10 includes a shell body and an annular bottom cover 60 cooperatively connected with the shell body, the annular bottom cover 60 is provided with a mounting hole 102, the annular bottom cover 60 is formed with a second annular rib 70 towards the inside of the sealing area 1011, and the second annular rib 70 extends to the low-elasticity wear-resistant member 30 or contacts with the first annular rib 50. When the installation, the form of threaded connection can be set between the annular bottom cover 60 and the shell 10, the installation and subsequent disassembly are convenient, the maintenance and cleaning work is convenient, the annular bottom cover 60 is provided with the second annular rib 70 extending into the sealing area 1011, the second annular rib 70 can selectively extend to the low-elasticity wear-resistant part 30, the top of the second annular rib 70 is abutted against and extrudes the high-elasticity sealing ring 40, on one hand, the transverse size of the low-elasticity wear-resistant part 30 can be reduced, the cost is reduced, on the other hand, the second annular rib 70 can limit the low-elasticity wear-resistant part 30 and prevent the low-elasticity wear-resistant part from transversely shaking, and can also be matched with the first annular rib 50 together, the high-elasticity sealing ring 40 is restrained and extruded in the vertical direction, the high-elasticity sealing ring 40 is prevented from moving up and down, and the high-elasticity sealing ring 40 is more tightly attached to the balls 20. Of course, besides the above embodiments, the second annular rib 70 may also extend directly to the first annular rib 50, the top of the second annular rib abuts against the first annular rib 50, and the outer sides of the low-elasticity wear-resistant member 30 and the high-elasticity sealing ring 40 both abut against the second annular rib 70, so that the transverse dimensions of the two are reduced, and the production cost is reduced.

The utility model can be realized by adopting or using the prior art for reference in places which are not mentioned in the utility model.

All 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 other embodiments.

The above are only examples of the present invention, and are not intended to limit the present invention. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A rolling element with good sealing performance is characterized by comprising:

the mounting structure comprises a shell, a mounting hole and a sealing ring, wherein the shell is internally provided with a mounting cavity and is provided with the mounting hole, the mounting hole is communicated with the mounting cavity, the mounting cavity comprises a sealing area, and the sealing area is close to the mounting hole;

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

the low-elasticity wear-resistant part is arranged in the sealing area, surrounds the outer side of the ball and is abutted against the surface of the ball;

high-elastic sealing washer, high-elastic sealing washer set up in the seal land, and with low elasticity wearing parts is kept away from one side butt of mounting hole, high-elastic sealing washer inboard with ball surface butt.

2. The rolling element with good sealing performance as claimed in claim 1, wherein the high-elasticity sealing ring is provided with a dustproof lip portion and a sealing lip portion, the dustproof lip portion and the sealing lip portion are sequentially abutted against the surface of the ball, and the sealing lip portion is surrounded by an elastic fastening piece so that the sealing lip portion is attached to the surface of the ball.

3. The rolling element with good sealing performance as claimed in claim 2, wherein the high-elasticity sealing ring is provided with an engaging portion, the engaging portion abuts against the housing, the engaging portion connects and supports the dust lip portion and the sealing lip portion, so that the dust lip portion and the sealing lip portion are both abutted against the surface of the ball, an installation space is provided between the engaging portion and the sealing lip portion, the elastic fastening member is a self-tightening spring, and the self-tightening spring is arranged in the installation space and surrounds the outer side of the sealing lip portion.

4. A rolling element as claimed in claim 2, wherein said dust lip and said sealing lip are each provided with a lip end which is wedge-shaped and abuts against the surface of said ball.

5. A rolling body as claimed in claim 2, wherein said dust lip is provided on a side adjacent to said low-resilience wear member.

6. A rolling element as claimed in claim 5, characterized in that a receiving space is provided between the dust lip and the low-resilience wear part.

7. The rolling element with good sealing performance as claimed in claim 1, wherein the low-elasticity wear-resistant member is provided with a partition portion and an abutting portion, the partition portion is arranged between the mounting hole and the ball, the abutting portion is in contact with the high-elasticity sealing ring, and both the partition portion and the abutting portion are in abutment with the surface of the ball.

8. The rolling element with good sealing performance as claimed in claim 7, wherein an elastic ring is arranged between the outer shell and the low-elasticity wear-resistant part, the abutting part is arranged between the elastic ring and the high-elasticity sealing ring, and the elastic ring presses the low-elasticity wear-resistant part.

9. The rolling element with good sealing performance as claimed in claim 1, wherein the side wall of the mounting cavity is provided with a first annular rib extending inwards, the first annular rib divides the mounting cavity into a sealing area and a rolling area, and the high-elasticity sealing ring is abutted against the first annular rib.

10. The rolling element of claim 9, wherein the outer casing comprises a casing body and an annular bottom cover which is connected with the casing body in a matching way, the annular bottom cover is provided with the mounting hole, a second annular rib is formed on the annular bottom cover towards the inside of the sealing area, and the second annular rib extends to the low-elasticity wear-resistant part or is in contact with the first annular rib.