CN113800199B

CN113800199B - Rolling element

Info

Publication number: CN113800199B
Application number: CN202110995394.9A
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: 2021-08-27
Filing date: 2021-08-27
Publication date: 2023-07-07
Anticipated expiration: 2041-08-27
Also published as: CN113800199A

Abstract

The invention belongs to the technical field of material conveying devices, and particularly relates to a rolling body, which comprises a shell and balls, wherein a mounting cavity is formed in the shell, the balls are mounted in the mounting cavity, and part of the balls extend out of the bottom side of the shell; the shell inner wall has the holding surface, and the top butt of ball is in the holding surface, and the chamber wall in the installation chamber at the edge of holding surface is equipped with the blowdown hole, blowdown hole and installation chamber intercommunication. The ball of the rolling body is directly abutted with the supporting surface, so that impurities entering between the ball and the supporting surface can be reduced, the resistance of the impurities to the rolling of the ball is further reduced, and the abrasion of the impurities to the ball and the supporting surface is reduced. In addition, the blowdown hole is located the edge of holding surface, can improve the efficiency of impurity discharge installation cavity, reduces the probability of impurity compaction at the installation cavity.

Description

Rolling element

Technical Field

The invention relates to the technical field of material conveying devices, in particular to a rolling body.

Background

Currently, existing rolling bodies generally comprise a housing, balls mounted inside the housing, the balls extending partially beyond the underside of the housing and being capable of rolling relative to the housing. The rolling bodies can be used for a material conveying device to reduce the running resistance of the material conveying device, for example, the rolling bodies can be applied to a scraper conveyor, and the scraper conveyor is a conveying device for conveying coal and materials and generally comprises a chain and a scraper arranged on the chain, wherein the chain can drive the scraper to slide on a conveying surface of the scraper conveyor. However, the scraper conveyor is usually used in a scene of poor environmental cleanliness such as a coal mine, and the conveying surface is usually provided with impurities such as coal dust and sludge. In the operation process of the scraping plate, impurities easily enter the shell, the impurities accumulated in the shell are gradually compacted, the balls are clamped in the shell and are difficult to rotate, and the balls are easily worn by some impurities with larger hardness.

Disclosure of Invention

In order to solve the technical problems, the invention provides the rolling body, which can reduce the probability of impurity compaction in the mounting cavity of the shell, reduce the abrasion of impurities to the balls and effectively solve the problems in the prior art.

In order to solve the above problems, the present invention provides a rolling element, including a housing and balls, wherein a mounting cavity is formed in the housing, the balls are mounted in the mounting cavity, and the balls partially extend out of the bottom side of the housing; the shell inner wall has the holding surface, and the top butt of ball is in the holding surface, and the chamber wall in the installation chamber at the edge of holding surface is equipped with the blowdown hole, blowdown hole and installation chamber intercommunication.

Further, the edge of the supporting surface is provided with a dirt guiding channel which forms a part of the installation cavity, and the dirt discharging hole is arranged on the wall of the dirt guiding channel.

Further, the edge of the supporting surface is positioned between the upper edge and the lower edge of the dirt guiding channel, the distance between the upper edge and the lower edge of the dirt guiding channel is H, and the distance between the edge of the supporting surface and the lower edge of the dirt guiding channel is H, and H is more than or equal to 0.15H and less than or equal to 0.85H.

Further, an outer surface of the ball having an arc length of at least 0.5mm is exposed within the dirt guide channel.

Further, the blowdown hole is arranged on the top wall of the installation cavity.

Further, the shell comprises a shell body and a supporting seat arranged on the shell body, an installation cavity is formed in the shell body, the supporting seat stretches into the installation cavity and is provided with a supporting surface, and a part of dirt guiding channels are formed on the side of the supporting seat.

Further, the inner surface of the dirt guiding channel surrounded by the shell body is an arc-shaped surface which is sunken towards the support seat.

Further, the shell body comprises a shell body and a bottom cover arranged at the bottom of the shell body, the shell body and the bottom cover form at least part of walls of the dirt guiding channel, a sealing element is arranged in a part of installation cavity formed in the bottom cover, and the sealing element is clamped by the balls and the bottom cover.

Further, the bottom cover comprises an upper cover body and a lower cover body which is abutted to the bottom surface of the upper cover body, the upper surface of the upper cover body forms part of the inner surface of the dirt guiding channel, and a sealing element is arranged in a part of the installation cavity formed in the lower cover body.

Further, the supporting seat is a polytetrafluoroethylene plastic supporting seat.

The ball bearing has the beneficial effects that the ball bearing is directly abutted with the supporting surface, so that impurities entering between the ball bearing and the supporting surface can be reduced, the resistance of the impurities to the rolling of the ball bearing is further reduced, and the abrasion of the impurities to the ball bearing and the supporting surface is reduced. In addition, the blowdown hole is located the edge of holding surface, can improve the efficiency of impurity discharge installation cavity, reduces the probability of impurity compaction at the installation cavity. The rolling element effectively solves the problems existing in the prior art.

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 invention and do not constitute a limitation on the invention. In the drawings:

fig. 1 is a schematic front view of a rolling element according to an embodiment of the present invention.

Fig. 2 is a schematic cross-sectional view of a rolling element according to an embodiment of the present invention.

FIG. 3 is a schematic view of a part of a cross-sectional structure of a rolling element mounted on a scraper according to an embodiment of the present invention.

Wherein: 1. a housing; 11. a mounting cavity; 12. a blow-down hole; 13. a dirt guiding channel; 14. a housing body; 141. a shell body; 142. a bottom cover; 1421. an upper cover; 1422. a lower cover; 15. a support base; 16. an arc surface; 2. a ball; 3. and a seal.

Detailed Description

In order to more clearly illustrate the general inventive concept, reference will be made in the following detailed description, by way of example, to 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 invention, however, the present invention may be practiced in other ways than as 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 "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.

In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. However, it is noted that a direct connection indicates that two bodies connected together do not form a connection relationship by an excessive structure, but are connected to form a whole by a connection structure. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," 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 present invention. In this specification, schematic representations of the above terms are not necessarily directed 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 and 2, there is provided a rolling element comprising a housing 1 and balls 2, wherein a mounting chamber 11 is formed inside the housing 1, the balls 2 are mounted in the mounting chamber 11, and the balls 2 partially protrude from the bottom side of the housing 1; the inner wall of the shell 1 is provided with a supporting surface, the top of the ball 2 is abutted against the supporting surface, a blow-down hole 12 is arranged on the cavity wall of the installation cavity 11 at the edge of the supporting surface, and the blow-down hole 12 is communicated with the installation cavity 11.

When the rolling bodies are in operation, impurities easily enter the installation cavity 11 and gradually accumulate in the installation cavity 11, on one hand, the impurities entering the installation cavity 11 can generate thrust on the impurities already positioned in the installation cavity 11, and part of impurities can be discharged from the sewage discharging hole 12 under the action of the thrust; on the other hand, the rotation of the ball 2 gives a moving force to the foreign matters in the installation cavity 11, and the moving force can promote the foreign matters in the installation cavity 11 to be discharged from the drain hole 12; on the other hand, the rolling elements vibrate during operation, so that impurities can have certain loosening mobility in the installation cavity 11, and the impurities can be further promoted to be discharged from the drain hole 12.

During the rolling process of the ball 2, foreign matters from the outside are easily attached to the outer surface of the ball 2, and enter the installation cavity 11 along with the rolling of the ball 2. The ball 2 and the supporting surface are directly abutted, so that gaps between the ball 2 and the supporting surface can be reduced, impurities between the outer surfaces of the ball 2 can be blocked when moving to the edge of the supporting surface, partial impurities can be scraped from the surface of the ball 2, impurities between the ball 2 and the supporting surface are reduced, and resistance caused by the impurities to rolling of the ball 2 is reduced. Particularly, for impurities containing substances with higher hardness, the impurities are not easy to enter between the supporting surface and the balls 2, so that the abrasion of the impurities to the balls 2 and the supporting surface can be reduced. In addition, after most of the foreign matter on the outer surface of the ball 2 is scraped off, a small amount of foreign matter adheres to the outer surface of the ball 2, for example, fine powder having a lubricating effect, fluid-like coal slime, and the like, thereby assisting in lubricating the support surface and the ball 2.

In addition, since the foreign substances easily enter the installation cavity 11 from the gap between the outer surface of the ball 2 and the inner wall of the housing 1, most of the foreign substances are first introduced into the space of the edge of the support surface. As shown in fig. 2, the drain hole 12 is located at the edge of the support surface, and most of the impurities can be discharged from the drain hole 12 before entering the gap between the support surface and the ball 2, so that the efficiency of discharging the impurities out of the installation cavity 11 can be improved, and the probability of compacting the impurities in the installation cavity 11 can be reduced. And for impurities containing substances with higher hardness, most of impurities can be discharged from the blow-down holes 12 at the edge of the supporting surface before the impurities move between the supporting surface and the balls 2, so that the abrasion of the impurities on the balls 2 and the supporting surface is further reduced.

In a preferred embodiment, further specifically, the edge of the support surface is provided with a dirt guiding channel 13, the dirt guiding channel 13 forming part of the mounting cavity 11, and the dirt discharge hole 12 is provided in the wall of the dirt guiding channel 13. As shown in the embodiment of fig. 2, the dirt guiding channel 13 provides a flowing space for the impurities, and especially vibration generated by the rolling bodies during operation can promote the impurities to flow in the dirt guiding channel 13, so that the impurities are in a loose state, the impurities are further prevented from being compacted in the installation cavity 11, and the impurities are conveniently discharged from the blow-down hole 12.

In addition, as in the embodiment shown in fig. 3, the rolling bodies may be mounted on a scraper having a dirt storage chamber, and the dirt discharge hole 12 communicates the dirt storage chamber with the dirt guide channel 13. Specifically, in a scenario that some impurities contain liquid such as moisture (mainly the moisture generated by spraying dust fall), when the scraper overturns to the ball 2 to face upwards in the running process, the impurities in the dirt guide channel 13 enter the dirt storage cavity from the dirt discharge hole 12 under the action of dead weight. When the scraper is turned over again to the ball 2 downwards, the water in the impurities in the dirt storage cavity easily flows back into the dirt guide channel 13 under the action of the vibration and the dead weight of the scraper due to the high mobility of the liquid. The dirt guiding channel 13 provides a flowing space for liquid, and the liquid can flow in the dirt guiding channel 13, so that impurities in the dirt guiding channel 13 are diluted, the overall fluidity of the impurities is further increased, the compaction of the impurities is prevented, and the resistance of the diluted impurities to the ball 2 is reduced.

For the embodiment shown in fig. 2, more specifically, the edge of the supporting surface is located between the upper edge and the lower edge of the dirt guiding channel 13, the distance between the upper edge and the lower edge of the dirt guiding channel 13 is H, and the distance between the edge of the supporting surface and the lower edge of the dirt guiding channel 13 is H, where H is 0.15 h.ltoreq.h.ltoreq.0.85H.

Under the vibration action of the rolling bodies, besides a part of impurities are discharged from the sewage discharging hole 12, a part of impurities positioned in the sewage guiding channel 13 are easy to be layered to a certain extent, impurities with relatively higher density are easy to be gathered at the bottom of the sewage guiding channel 13, and impurities with lower density are easy to be gathered at the top of the sewage guiding channel 13. Specifically, in the case where the impurities contain liquid such as moisture, solid impurities having relatively high density are easily collected at the bottom of the dirt guiding channel 13, slurry impurities having relatively low density are easily collected at the middle of the dirt guiding channel 13, and liquid impurities having lower density are easily collected at the top of the dirt guiding channel 13. The probability that the edge of the supporting surface contacts the pasty impurities is larger, and when the ball 2 rotates on the supporting surface, the pasty impurities can lubricate the ball 2, so that the running smoothness of the ball 2 is improved, and the abrasion of the ball 2 is reduced.

Further specifically, the outer surface of the ball 2 having an arc length of at least 0.5mm is exposed in the dirt guide channel 13. As in the embodiment shown in fig. 2, during operation of the rolling elements, a portion of the foreign matter from the outside will adhere to the outer surface of the balls 2 and enter the mounting chamber 11 as the balls 2 roll. When the ball 2 rolls, the impurities on the surface of the ball can rub with other impurities in the dirt guide channel 13, so that the foreign matters on the outer surface of the ball 2 can be scraped, the foreign matters on the outer surface of the ball 2 are reduced to enter between the ball 2 and the supporting surface, the resistance of the foreign matters to the rolling of the ball 2 is reduced, and the abrasion of the foreign matters to the ball 2 and the supporting seat 15 is reduced.

In the case where the impurity contains a substance having a lubricating effect such as slime, a small amount of impurity such as fine powder having a lubricating effect or fluid slime is adhered to the surface of the ball 2 after most of the impurity is scraped off, and the impurity enters between the ball 2 and the support surface along with the rotation of the ball 2, so that the ball 2 can be lubricated. Furthermore, the balls 2 can move the impurities in the dirt guide channel 13 in the rolling process, so that the fluidity of the impurities is improved, and the impurities are easier to discharge out of the dirt discharge hole 12. In addition, in some scenes where the impurities contain liquid such as moisture, the moisture entering the dirt guiding channel 13 can contact the balls 2 and take away a part of heat of the balls 2, so as to cool the balls 2 and prevent the impurities from caking.

In a preferred embodiment, further specifically, a drain hole 12 is provided in the top wall of the mounting cavity 11. As shown in the embodiment of fig. 2, during operation, the rolling elements are introduced into the installation cavity 11 from the bottom side of the housing 1, on one hand, as the impurities in the installation cavity 11 are increased, the impurities are gradually accumulated upwards, and on the other hand, the balls 2 more easily drive the impurities to move upwards during rolling, so that the impurities can be more easily discharged from the drain hole 12 arranged on the top wall of the installation cavity 11.

In addition, as in the embodiment shown in fig. 3, the rolling bodies may be mounted on a scraper having a dirt storage chamber, the dirt discharge hole 12 communicates with the dirt storage chamber and the dirt guide passage 13, and in this case, the dirt storage chamber may be disposed above the dirt discharge hole 12. Specifically, in the scenario that some impurities contain liquid such as moisture, the dirt guiding channel 13, the dirt discharging hole 12 and the dirt storing cavity are almost in the same vertical direction, when the scraper overturns to the upward direction of the ball 2 in the running process, the impurities in the dirt guiding channel 13 are easier to enter the dirt storing cavity from the dirt discharging hole 12 under the action of dead weight. When the scraper is turned over to the ball 2 downwards again, the water in the impurities in the dirt storage cavity flows back into the dirt guide channel 13 more easily under the action of the vibration and the dead weight of the scraper due to the large fluidity of the liquid, so that the impurities in the dirt guide channel 13 are diluted.

It should be noted that the arrangement of the drain hole 12 is not limited to the above embodiment, and in another embodiment, the drain hole 12 is provided on a side wall of the mounting cavity 11.

In a preferred embodiment, further specifically, the casing 1 includes a casing body 14 and a supporting seat 15 mounted on the casing body 14, the casing body 14 has a mounting cavity 11 therein, the supporting seat 15 extends into the mounting cavity 11 and has a supporting surface, and a part of the dirt guiding channel 13 is provided on a side of the supporting seat 15.

The shell body 14 and the supporting seat 15 are split, according to design requirements, the supporting seat 15 and the shell body 14 can be respectively processed into required structures so as to reduce processing difficulty, and suitable materials can be respectively selected for processing, for example, the supporting seat 15 can be made of materials with lubricating effect so as to improve rolling performance of the ball 2, and the shell body 14 can be made of materials with lower cost. In addition, heat is generated during the friction process between the supporting seat 15 and the ball 2, and in the scene that the impurity contains liquid such as water, the liquid in the dirt guiding channel 13 can contact the supporting seat 15 so as to cool the supporting seat 15.

Further specifically, the inner surface of the housing body 14 surrounding the dirt guiding channel 13 is an arc-shaped surface 16 recessed away from the supporting seat 15. As shown in the embodiment of fig. 2, the impurities in the dirt guiding channel 13 can move towards the sewage draining hole 12 along the arc-shaped surface 16, the arc-shaped surface 16 can prevent the impurities from being blocked in the dirt guiding channel 13, the mobility of the impurities in the dirt guiding channel 13 can be improved, the blocking phenomenon of the dirt guiding channel 13 is reduced, and the impurities are more easily discharged from the sewage draining hole 12.

As for the structure of the housing body 14, more specifically, the housing body 14 includes a housing body 141 and a bottom cover 142 mounted at the bottom of the housing body 141, the housing body 141 and the bottom cover 142 form at least part of the wall of the dirt guiding channel 13, a sealing member 3 is disposed in a part of the mounting cavity 11 formed inside the bottom cover 142, and the sealing member 3 is clamped by the balls 2 and the bottom cover 142. As in the embodiment shown in fig. 2, the seal 3 is able to reduce the gap between the balls 2 and the bottom cover 142, thereby further reducing the ingress of impurities from the bottom of the housing 1 into the mounting cavity 11. Meanwhile, the case body 141 and the bottom cover 142 may be respectively processed with corresponding structures to form at least part of the wall of the dirt guide channel 13, so as to reduce processing difficulty.

In more detail, regarding the structure of the bottom cover 142, the bottom cover 142 includes an upper cover body 1421 and a lower cover body 1422 abutting against the bottom surface of the upper cover body 1421, wherein the upper surface of the upper cover body 1421 forms a part of the inner surface of the dirt guiding channel 13, and the part of the installation cavity 11 formed inside the lower cover body 1422 is provided with the sealing member 3. The upper cover 1421 and the lower cover 1422 are split, and can be processed separately, so that the processing difficulty can be reduced. Specifically, machining the arcuate surface 16 on the upper cover 1421 and the cavity to mount the seal 3 on the lower cover 1422 is easier than machining the arcuate surface 16 and the cavity to mount the seal 3 on the integral bottom cover 142.

It should be noted that the form of the seal member 3 is not limited in the present invention, and for example, the seal member 3 may be a seal ring.

In the form of the support base 15, further specifically, the support base 15 is a polytetrafluoroethylene plastic support base 15. The polytetrafluoroethylene plastic support 15 has a low coefficient of friction and the ball 2 has a low resistance when rolling on the support surface of the polytetrafluoroethylene plastic support 15. Moreover, the polytetrafluoroethylene plastic support 15 is resistant to high temperature, and when the balls 2 and the polytetrafluoroethylene plastic support 15 rub to generate heat, the polytetrafluoroethylene plastic support 15 is not easy to damage.

It should be noted that the improvement of the present invention is that the structure of the rolling element is not limited to the application scenario of the rolling element, and in order to easily understand the technical effects of the rolling element of the present invention, the present specification lists some application scenarios of the rolling element. For example, the specification refers to the application of the rolling bodies in a scene of a screed with a dirt storage chamber in describing technical effects, but the rolling bodies are not limited to the application in this scene.

In this specification, each embodiment is described in a progressive manner, and identical and similar parts of each embodiment are all referred to each other, and each embodiment mainly describes differences from other embodiments. In particular, for system embodiments, since they are substantially similar to method embodiments, the description is relatively simple, as relevant to see a section of the description of method embodiments.

The foregoing is merely exemplary of the present application and is not intended to limit the present application. Various modifications and changes may be made to the present application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc. which are within the spirit and principles of the present application are intended to be included within the scope of the claims of the present application.

Claims

1. The rolling element is characterized by comprising a shell and balls, wherein a mounting cavity is formed in the shell, the balls are mounted in the mounting cavity, and part of the balls extend out of the bottom side of the shell; the inner wall of the shell is provided with a supporting surface, the top of the ball is abutted against the supporting surface, a pollution discharge hole is formed in the cavity wall of the mounting cavity at the edge of the supporting surface, and the pollution discharge hole is communicated with the mounting cavity;

the edge of the supporting surface is provided with a dirt guiding channel, the dirt guiding channel forms a part of the installation cavity, and the dirt discharging hole is arranged on the wall of the dirt guiding channel;

the edge of the supporting surface is positioned between the upper edge and the lower edge of the dirt guiding channel, the distance between the upper edge and the lower edge of the dirt guiding channel is H, and the distance between the edge of the supporting surface and the lower edge of the dirt guiding channel is H which is more than or equal to 0.15H and less than or equal to 0.85H.

2. The rolling element of claim 1 wherein an outer surface of the ball bearing having an arc length of at least 0.5mm is exposed within the dirt guide channel.

3. The rolling element of claim 1 wherein the drain hole is provided in a top wall of the mounting cavity.

4. The rolling element of claim 1 wherein the housing comprises a housing body and a support base mounted to the housing body, the housing body having the mounting cavity therein, the support base extending into the mounting cavity and having the support surface, the support base having a portion of the dirt guide channel laterally thereof.

5. The rolling element of claim 4 wherein the inner surface of the housing body surrounding the dirt guide channel is arcuate facing away from the support seat depression.

6. The rolling element according to claim 4 or 5, wherein the housing body comprises a shell body and a bottom cover mounted at the bottom of the shell body, the shell body and the bottom cover constitute at least part of the wall of the dirt guiding passage, a sealing member is provided in a part of the mounting cavity formed inside the bottom cover, and the sealing member is held by the balls and the bottom cover.

7. The rolling element according to claim 6, wherein the bottom cover comprises an upper cover body and a lower cover body abutting against the bottom surface of the upper cover body, the upper surface of the upper cover body forms part of the inner surface of the dirt guiding passage, and part of the installation cavity formed in the lower cover body is provided with the sealing member.

8. The rolling element of claim 4 wherein the bearing is a polytetrafluoroethylene plastic bearing.