阅读说明：本技术 新型深沟球轴承 (Novel deep groove ball bearing ) 是由 宫成飞 于 2020-04-20 设计创作，主要内容包括：本发明提供一种新型深沟球轴承,属于轴承领域,包括有外圈、内圈、滚珠,外圈与内圈之间设于用于安装滚珠的滚道,外圈、内圈上分别设有环槽,环槽中安装有密封件,内圈的环槽为双台阶结构,密封件与内圈的环槽相配合的内唇包括第一、第二密封唇,第一、第二密封唇分别与双台阶结构中的不同阶面配合。本发明通过设计双台阶结构实现了轴承与密封件连接处的内侧、外侧两个方向上的双重密封,能够在较大程度上阻挡外界灰尘、杂质等进入轴承内部,保证轴承的正常工作和性能。(The invention provides a novel deep groove ball bearing, which belongs to the field of bearings and comprises an outer ring, an inner ring and balls, wherein a raceway for mounting the balls is arranged between the outer ring and the inner ring, annular grooves are respectively arranged on the outer ring and the inner ring, sealing elements are mounted in the annular grooves, the annular grooves of the inner ring are of a double-step structure, inner lips, matched with the annular grooves of the inner ring, of the sealing elements comprise a first sealing lip and a second sealing lip, and the first sealing lip and the second sealing lip are respectively matched with different step surfaces in the double-step structure. The double-step structure is designed to realize double sealing in the inner side and the outer side of the joint of the bearing and the sealing element, so that external dust, impurities and the like can be prevented from entering the inside of the bearing to a greater extent, and the normal work and performance of the bearing are ensured.)

1. The utility model provides a novel deep groove ball bearing, includes outer lane, inner circle, ball, locates the raceway that is used for installing the ball between outer lane and the inner circle, is equipped with the annular respectively in outer lane, the inner circle, installs sealing member, its characterized in that in the annular: the ring groove of the inner ring is of a double-step structure, the inner lip of the sealing element matched with the ring groove of the inner ring comprises a first sealing lip and a second sealing lip, and the lip mouths of the first sealing lip and the second sealing lip are respectively matched with different step surfaces in the double-step structure.

2. The new deep groove ball bearing of claim 1, wherein: in the double-step structure, when one side of the ball is taken as the inner side, the step surface positioned on the outer side is in contact fit with the lip of the first sealing lip.

3. The new deep groove ball bearing of claim 1 or 2, characterized in that: in the double-step structure, when one side of the ball is taken as the inner side, the step surface positioned on the inner side is opposite to the lip mouth of the second sealing lip and is in clearance fit with the lip mouth of the second sealing lip.

4. The new deep groove ball bearing of claim 3, wherein: the clearance between the step surface positioned on the inner side and the lip mouth of the second sealing lip of the sealing element is 0.01-0.08 mm or 1-2% of the axial length of the inner ring.

5. The new deep groove ball bearing of claim 3, wherein:

the double-step structure is formed by sequentially connecting a step surface I, an arc-shaped connecting section I, a step side wall, an arc-shaped connecting section II, a step surface II and an arc-shaped connecting section III;

the lip mouth of the second sealing lip comprises a first side plane and a first bottom plane, wherein the first side plane is used for being in clearance fit with the step surface, and the first bottom plane is in clearance fit with the step side wall;

the second sealing lip and the third sealing lip are in transition connection by adopting an arc section I;

one end of the first side plane is right opposite to the second step surface, and the other end of the first side plane is right opposite to the third arc-shaped connecting section.

6. The new deep groove ball bearing of claim 5, wherein: still be equipped with the third seal lip on the inner lip of sealing member to when ball place one side was inboard, the third seal lip was located the outside, and the annular outside of inner circle is equipped with flange and third seal lip clearance fit adjacent rather than:

the lip of the third sealing lip comprises a second bottom plane which is used for being in parallel clearance fit with the upper surface of the flange;

the second side plane is vertically connected with one side of the second bottom plane, and a corner formed by the intersection of the second side plane and the second bottom plane is right opposite to the upper surface of the flange;

and the first inclined plane is connected with the other side of the bottom plane, and the corner of the connection part is opposite to the ring groove.

7. The new deep groove ball bearing of claim 6, wherein: the lip of the third sealing lip further comprises a second inclined plane, the second inclined plane is connected with the main body through a second concave arc section, and the second arc section is opposite to the first arc section.

8. The new deep groove ball bearing of claim 7, wherein: the interval between the side plane and same arc-shaped connecting sections III is not smaller than the interval between the side plane and same step surface II, the interval between the bottom plane and same step side wall, the interval between the connecting part of the side plane I and the bottom plane I and the arc-shaped connecting sections II, and the interval between the arc-shaped sections I and the step surface I.

9. The new deep groove ball bearing of any of claims 4 to 8, wherein: the first side plane of the second sealing lip is parallel to the radial direction of the inner ring, and the step surface or the second step surface opposite to the second sealing lip is parallel to the radial direction of the bearing.

10. The new deep groove ball bearing of any of claims 4 to 8, wherein: both sides of the roller path are provided with retaining shoulders which are of asymmetric structures, wherein one side is a large retaining shoulder, and the other side is a small retaining shoulder.

Technical Field

The invention relates to the field of bearings, in particular to a novel deep groove ball bearing.

Background

The bearing is widely applied, and in order to ensure normal use and prolong the service life of the bearing, a sealing element is usually arranged between the inner ring and the outer ring at two sides of the bearing to cover the side surface of the bearing, so that external foreign matters are prevented from entering the bearing or damaging the internal structure of the bearing. In addition, the sealing element is arranged, so that lubricating grease for lubricating in the bearing can be reserved, and the friction in the bearing is reduced.

At present, the contact type sealing structure of the most common deep groove ball bearing is used as shown in the attached drawing 3 of the Chinese utility model with the patent application number of 200620044420.0, the contact type deep groove ball bearing comprises an inner ring, an outer ring, balls, a retainer and a sealing ring, the lower edge of the sealing ring is provided with three extending lips, a sealing groove is arranged on the inner ring between the lip at the outer side and the middle lip, the middle lip is contacted with the side surface of the sealing groove of the inner ring, a gap is arranged between the inner side lip and the inner ring, and a gap is arranged between the lip at the outer side and the inner ring. The sealing groove is used for storing grease flowing out from a gap between the inner side lip and the inner ring.

Although the sealing structure has reliable sealing performance, the sealing structure can only meet the use requirements of general occasions, and the sealing performance of the sealing structure can not meet the occasions with a plurality of special requirements which are stricter in sealing requirements.

Based on this, the present application is proposed.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides a novel deep groove ball bearing which has better sealing performance so as to meet the use requirement of special occasions with higher sealing performance requirements.

In order to achieve the purpose, the invention provides a novel deep groove ball bearing which comprises an outer ring, an inner ring and balls, wherein a raceway for mounting the balls is arranged between the outer ring and the inner ring, annular grooves are respectively arranged on the outer ring and the inner ring, sealing elements are mounted in the annular grooves, the annular grooves of the inner ring are of a double-step structure, inner lips of the sealing elements, which are matched with the annular grooves of the inner ring, comprise a first sealing lip and a second sealing lip, and lip mouths of the first sealing lip and the second sealing lip are respectively matched with different step surfaces in the double-step structure.

According to the invention, the double-step structure is designed to be matched and sealed with the sealing lip, so that the sealing performance is improved through the following aspects: in the one, two step structure, increased the quantity of the sealed median that the cooperation formed between the inner wall of seal lip and annular, formed dual seal effect between seal lip and annular to promote sealed effect. In the double-step structure, step difference exists between two step surfaces, so that the two sealing isolation belts are positioned on different axial planes of the bearing by external foreign matters, thereby avoiding the situation that the sealing effect is easy to lose simultaneously when the double sealing isolation belts are positioned on the same plane, and improving the sealing effect. In the structure, the double steps and the sealing lips are blocked by the extension paths and the step differences to form a sealing structure close to a labyrinth, so that the sealing effect is improved.

In order to further improve the sealing effect, the invention is further provided with the following components: in the double-step structure, the step surface positioned on the outer side is in contact fit with the first sealing lip of the inner lip of the sealing element. Compared with clearance fit, the contact between the sealing lip and the step surface is tighter during contact fit, so that the entry of a substance with a larger volume, such as more than 0.5mm, can be effectively prevented³Dust particles cannot pass through the sealing isolation belt. In addition, the sealing element can be fixed to prevent the sealing element from moving freely, and the position relation between the second sealing lip and the other step surface is kept stable as much as possible.

The invention further provides the following: in the double-step structure, the step surface positioned on the inner side is opposite to the second sealing lip of the inner lip of the sealing element and is in clearance fit with the second sealing lip. After the bearing is operated, a grease accumulation area is formed in the clearance area, and secondary sealing is performed. Because the grease gathering area is formed by the operation of the bearing, the grease gathering area is always present and plays a sealing effect as long as the bearing operates as long as the sealing element is not separated or a large position deviation exists.

In order to ensure the sealing effect, the invention further comprises the following steps: the clearance between the step surface positioned on the inner side and the second sealing lip of the sealing element is 0.01-0.08 mm or 1-2% of the axial length of the inner ring.

The inner side and the outer side are described by taking the side where the ball is located as the inner side, wherein the inner side refers to the inside after the bearing is assembled, and the outer side refers to the outside after the bearing is assembled.

In order to prevent the grease from gathering in the grease gathering area, the invention further provides that: the double-step structure is formed by sequentially connecting a step surface I, an arc-shaped connecting section I, a step side wall, an arc-shaped connecting section II, a step surface II and an arc-shaped connecting section III. The lip mouth of the second sealing lip comprises a first side plane and a first bottom plane, wherein the first side plane is used for being in clearance fit with the step surface, and the first bottom plane is in clearance fit with the step side wall. The second sealing lip and the third sealing lip are in transition connection by adopting an arc section I; one end of the first side plane is right opposite to the second step surface, and the other end of the first side plane is right opposite to the third arc-shaped connecting section. Through the structure, the interval between the side planes and the same arc-shaped connecting section III is necessarily larger than the interval between the side planes and the same step surface II and the interval between the bottom planes and the same step side wall, and meanwhile, the grease can be prevented from escaping from the gap as much as possible by combining the gap and the viscosity, namely the tension, of the grease.

The invention further provides the following: when using ball place one side as the inboard, the third seal lip is located the outside, and the annular outside of inner circle is equipped with flange and third seal lip clearance fit adjacent rather than: the lip of the third sealing lip comprises a second bottom plane which is used for being in parallel clearance fit with the upper surface of the flange; the second side plane is vertically connected with one side of the second bottom plane, and a corner formed by the intersection of the second side plane and the second bottom plane is right opposite to the upper surface of the flange; and the first inclined plane is connected with the other side of the bottom plane, and the corner of the connection part is opposite to the ring groove. Firstly, a physical barrier is arranged outside the second sealing lip through the existence of the third sealing lip, then, the lubricating grease in the ring groove is prevented from escaping through the third sealing lip from the inner side (the side where the second sealing lip is located) through the special position of the bottom plane II, and meanwhile, a wind wall is formed from the outer side to play a certain role in preventing foreign matters from entering.

The invention further provides the following: the lip mouth of the third sealing lip further comprises a second inclined plane, the second inclined plane is connected with the main body through a second concave arc section, and the second arc section is opposite to the first arc section, so that the thickness of the first arc section is reduced, the flexibility of the inner lip is improved, and the first sealing lip is in flexible contact with the first step surface to reduce the friction force between the first sealing lip and the first step surface; in addition, because the concave recess that has a bowl form that is formed into because the existence of arc section two in the position department of above-mentioned arc section two, the recess of bowl form makes when the bearing rotates, reduces the relative rotation that the outside air produced in the interior lip annex and to the influence that the interior lip caused to make the cooperation between interior lip and annular, the flange more stable, also further ensures the stability that the lubricating grease that forms gathers the district.

In order to reduce friction and simultaneously reduce the escape of the lubricating grease in the lubricating grease gathering area, the invention further comprises the following steps: the interval between the side plane and same arc-shaped connecting sections III is not smaller than the interval between the side plane and same step surface II, the interval between the bottom plane and same step side wall, the interval between the connecting part of the side plane I and the bottom plane I and the arc-shaped connecting sections II, and the interval between the arc-shaped sections I and the step surface I.

In order to improve the sealing effect, the invention further comprises the following steps: the second seal lip has a flat surface parallel to its opposing step surface. Or the first side plane of the second sealing lip is parallel to the radial direction of the inner ring. On one hand, the plane enables a lubricating grease gathering area to be formed more easily, and on the other hand, a uniform isolation belt is formed between the plane and the plane more easily, so that the sealing effect of all positions of the bearing is ensured to be uniform.

The invention further provides the following: the step surface opposite the second seal lip is parallel to the radial plane of the bearing. Since foreign matters easily enter the inside of the bearing from the axial direction, when the step surface is arranged in parallel with the radial direction of the bearing, the foreign matters can be directly blocked by utilizing the perpendicular relation between the step surface and the axial direction to prevent the foreign matters from entering. Further, when the bearing is operated, the foreign matter entering is subjected to centrifugal force, so that it is difficult to enter the inside of the bearing from the radial direction. The invention is further set as follows:

in order to make the bearing suitable for the use in the special occasion that the unidirectional load is bigger, the invention further sets up as follows: the retaining shoulders on two sides of the bearing are of asymmetric structures, wherein one side is a large retaining shoulder, and the other side is a small retaining shoulder. The relative position of the large retaining shoulder and the small retaining shoulder is selected according to the direction of the received axial force, the direction of the small retaining shoulder is consistent with the direction of the received axial force, for example, the received axial force is applied from left to right, and the small retaining shoulder is positioned on the right side during installation, so that a larger one-way axial impact load can be borne. When one side of the bearing is subjected to a large unidirectional axial impact load, the seal on the other side of the bearing may also be impacted by a certain unidirectional axial load. According to the invention, the sealing performance depends on the stability between the inner ring and the outer ring to a certain extent, and the situation that the sealing performance is reduced due to the deflection of the inner ring under the condition of larger unidirectional axial load can be avoided by the aid of the retaining shoulder structure with the asymmetric structure.

In addition, the inner lip of the sealing element in the embodiment is characterized in that when the inner ring is sealed, an auxiliary physical barrier is formed by combining three main physical barriers formed by the first sealing lip, the second sealing lip and the third sealing lip, at least two different step surfaces with step differences in a double-step structure and matching of the at least two different step surfaces with the first sealing lip and the second sealing lip, and then a lubricating grease gathering area formed between the first sealing lip and the rib structure and between the third sealing lip and the second step surface are combined, so that the sealing performance of the bearing is further improved when the bearing operates, and a certain sealing performance can be still kept when the bearing is impacted by a unidirectional axial load, so that the bearing is suitable for being used in special occasions with larger unidirectional loads.

The invention has the following beneficial effects:

according to the double-step structure, the two sealing lips of the inner lip of the sealing element are respectively matched with the two step surfaces of the double step, so that a double sealing effect is formed, and the sealing effect of the sealing element is improved. And the retaining shoulders on the two sides of the bearing are further designed to be in an asymmetric structure, the relative positions of the large retaining shoulder and the small retaining shoulder are adaptively adjusted according to the axial size and direction, and the bearing has the characteristic of bearing larger one-way axial impact load.

Drawings

Fig. 1 is a schematic overall structure diagram of embodiment 1 of the present invention.

Fig. 2 is an enlarged schematic view of fig. 1A.

FIG. 3 is a schematic diagram of a two-step structure according to the present invention.

Fig. 4 is a schematic view of the inner lip structure of the present invention.

Fig. 5 is an enlarged schematic view of fig. 3B.

Fig. 6 is a schematic view of the use state 1 of embodiment 2 of the present invention.

Fig. 7 is a schematic view of the use state 2 in embodiment 2 of the present invention.

Fig. 8 is a schematic view of the seal structure of the present invention.

Reference numerals: 100-outer ring, 200-inner ring, 300-balls, 400-seal, 500-cage, 600-grease collection area;

101-left outer shoulder, 102-right outer shoulder, 201-left inner shoulder, 202-right inner shoulder, 210-shoulder, 212-step one, 213-step two, 214-step side wall, 220-ring groove, 221-rib, 410-outer lip, 420-main body, 430-inner lip, 431-first sealing lip, 432-second sealing lip, 433-third sealing lip, 434-arc segment one, 435-arc segment two;

212 a-arc connecting section I, 213 a-arc connecting section II, 214 a-arc connecting section III, 221 a-upper surface, 431 a-arc transition section I, 432 a-diversion inclined plane, 432 b-side plane I, 432 c-bottom plane I, 433 a-bottom plane II, 433 b-side plane II, 433 c-inclined plane I, 433 d-inclined plane II, 432 a-1-diagonal I, 432 b-1-diagonal II.

Detailed Description