阅读说明：本技术 免维护农机轮毂轴承 (Maintenance-free agricultural machinery hub bearing ) 是由 言奕 王朱裔 于 2020-06-24 设计创作，主要内容包括：本发明公开了一种免维护农机轮毂轴承,包括：法兰外圈、滚子轴承、连接轴和防尘盖,所述法兰外圈套置在所述滚子轴承外,形成整体式滚动结构；所述连接轴贯穿所述滚子轴承；所述防尘盖套置在所述连接轴的两端,并与所述法兰外圈配合,所述法兰外圈的大直径端和小直径端均开设有凹槽,所述防尘盖的一侧带有垂直于盖体方向的延伸边,所述防尘盖的延伸边插入配合到所述法兰外圈的凹槽内。本发明一种免维护农机轮毂轴承,通过法兰外圈与防尘盖的迷宫式配合结构的设计,能够进一步防止雨水和泥浆侵蚀油封,有效延长了油封的使用寿命,从而进一步增强整个轮毂轴承的密封效果,提高服役寿命,实用性强。(The invention discloses a maintenance-free agricultural machinery hub bearing, which comprises: the flange outer ring is sleeved outside the roller bearing to form an integral rolling structure; the connecting shaft penetrates through the roller bearing; the dustproof cover sleeves the two ends of the connecting shaft and is matched with the flange outer ring, grooves are formed in the large-diameter end and the small-diameter end of the flange outer ring, an extending edge perpendicular to the direction of the cover body is arranged on one side of the dustproof cover, and the extending edge of the dustproof cover is inserted into the grooves of the flange outer ring in a matched mode. According to the maintenance-free agricultural machine hub bearing, due to the design of the labyrinth type matching structure of the flange outer ring and the dustproof cover, rainwater and slurry can be further prevented from corroding the oil seal, the service life of the oil seal is effectively prolonged, the sealing effect of the whole hub bearing is further enhanced, the service life is prolonged, and the practicability is high.)

1. A maintenance-free agricultural machinery hub bearing, includes: the flange outer ring is sleeved outside the roller bearing to form an integral rolling structure; the connecting shaft penetrates through the roller bearing; the dustproof cover is sleeved at two ends of the connecting shaft and matched with the flange outer ring, and is characterized in that a first groove is formed in the large-diameter end and the small-diameter end of the flange outer ring, an extending edge perpendicular to the direction of the cover body is arranged on one side of the dustproof cover, and the extending edge of the dustproof cover is inserted and matched into the groove of the flange outer ring.

2. The maintenance-free agricultural machine hub bearing of claim 1, wherein the number of the first grooves located at the large-diameter section and/or the small-diameter end of the flange outer ring is more than one.

3. The maintenance-free agricultural machine hub bearing of claim 2, wherein the number of the extending edges on the dust cap is the same as the number of the first grooves with which the large diameter end or the small diameter end is fitted.

4. The maintenance-free agricultural machine hub bearing of claim 1, wherein the connecting shaft is a hollow shaft.

5. The maintenance-free agricultural machinery hub bearing of claim 4, wherein the side of the connecting shaft extending out of the large diameter end of the flange outer ring is provided with a threaded hole, and a nozzle tip is mounted on the threaded hole.

6. The maintenance-free agricultural machinery hub bearing of claim 1, wherein a sealing assembly is installed on the connecting shaft in an area between the outer sides of both ends of the roller bearing and the inner walls of the dust cover and the flange outer ring.

7. The maintenance-free agricultural machinery hub bearing of claim 6, wherein the sealing assembly comprises a sealing shaft sleeve and an oil seal, wherein the sealing shaft sleeve is arranged on the connecting shaft, and the oil seal is arranged between the sealing shaft sleeve and the inner wall of the flange outer ring.

8. The maintenance-free agricultural machinery hub bearing of claim 7, wherein a groove is formed in the outer side of one end, attached to the connecting shaft, of the sealing shaft sleeve, and an O-shaped ring is installed in the groove.

9. The maintenance-free agricultural machine hub bearing of claim 1, wherein the roller bearing comprises two sets of inner rings, a cage, and rolling bodies; the two groups of inner rings are arranged in the flange outer ring and are sleeved on the connecting shaft; the cage is mounted on the inner race, and the rolling elements are mounted on the cage; and an LLU sealing ring is arranged between the inner ring and the inner wall of the flange outer ring, and a sealing cavity is formed between the two inner rings.

10. The maintenance-free agricultural machinery hub bearing of claim 1, wherein the large diameter end of the flange outer ring is provided with a square hole.

Technical Field

The invention relates to the technical field of agricultural machinery manufacturing, in particular to a maintenance-free agricultural machinery hub bearing.

Background

Agricultural machinery requires long-term trouble-free operation in harsh environments, and any maintenance and unnecessary maintenance would result in direct economic losses. The agricultural machinery hub bearing bears the harsh requirements of impact, vibration, pollution, moisture, corrosion and the like in the practical use, so the reliability of the agricultural machinery hub bearing is very important for agricultural machinery.

The wheel hub bearing that agricultural tillage soil preparation machinery and seeding machinery used has developed second generation wheel hub bearing from first generation wheel hub bearing, all has showing promotion in the aspects such as the cooperation mode of bearing and flange overcoat, inner space utilization efficiency and waterproof silt prevention, has accomplished non-maintaining to a certain extent.

Chinese patent CN201810905030.5 discloses an integrated maintenance-free hub unit for agricultural machinery, which sets an integrated flange outer ring, an integrated flange inner ring, a connecting shaft, a retainer and a rolling body into an integrated rolling structure, and effectively prevents invasion of silt, rainwater and the like by using a three-layer sealing structure, thereby realizing maintenance-free to a certain extent and prolonging the service life of the hub unit. But the sealing performance at the both ends of this wheel hub unit's flange outer lane is not good, and its shield and end face seal's outward flange is direct to cooperate with the inward flange of flange outer lane, and rainwater, silt still invade from the gap of shield and end face seal and flange outer lane easily to corrode the oil blanket, reduce the life of oil blanket, its non-maintaining effect is not ideal.

Disclosure of Invention

The invention mainly solves the technical problem of providing a maintenance-free agricultural machinery hub bearing, which can solve the problems of the existing maintenance-free hub bearing.

In order to solve the technical problems, the invention adopts a technical scheme that: provided is a maintenance-free agricultural machinery hub bearing, including: the flange outer ring is sleeved outside the roller bearing to form an integral rolling structure; the connecting shaft penetrates through the roller bearing; the dustproof cover is sleeved at two ends of the connecting shaft and matched with the flange outer ring, first grooves are formed in the large-diameter end and the small-diameter end of the flange outer ring, an extending edge perpendicular to the direction of the cover body is arranged on one side of the dustproof cover, and the extending edge of the dustproof cover is inserted into and matched with the first grooves of the flange outer ring.

In a preferred embodiment of the present invention, the number of the first grooves located at the large-diameter section and/or the small-diameter end of the outer ring of the flange is more than one.

In a preferred embodiment of the present invention, the number of the extending edges on the dust cap is the same as the number of the first grooves of the large diameter end or the small diameter end matched with the extending edges.

In a preferred embodiment of the present invention, the connecting shaft is a hollow shaft.

In a preferred embodiment of the invention, a threaded hole is formed in one side of the connecting shaft, which extends out of the large-diameter end of the flange outer ring, and a nozzle tip is mounted on the threaded hole.

In a preferred embodiment of the present invention, a seal assembly is mounted on the connecting shaft in a region between outer sides of both ends of the roller bearing and inner walls of the dust cap and the flange outer ring.

In a preferred embodiment of the present invention, the sealing assembly includes a sealing sleeve and an oil seal, wherein the sealing sleeve is sleeved on the connecting shaft, and the oil seal is located between the sealing sleeve and the inner wall of the flange outer ring.

In a preferred embodiment of the present invention, a groove is formed in an outer side of one end of the sealing shaft sleeve, which is attached to the connecting shaft, and an O-ring is installed in the groove.

In a preferred embodiment of the present invention, the roller bearing includes two sets of inner rings, a cage, and rolling bodies; the two groups of inner rings are arranged in the flange outer ring and are sleeved on the connecting shaft; the cage is mounted on the inner race, and the rolling elements are mounted on the cage; and an LLU sealing ring is arranged between the inner ring and the inner wall of the flange outer ring, and a sealing cavity is formed between the two inner rings.

In a preferred embodiment of the present invention, the large diameter end of the flange outer ring is provided with a square hole.

The invention has the beneficial effects that: according to the maintenance-free agricultural machine hub bearing, due to the design of the labyrinth type matching structure of the flange outer ring and the dustproof cover, rainwater and slurry can be further prevented from corroding the oil seal, the service life of the oil seal is effectively prolonged, the sealing effect of the whole hub bearing is further enhanced, the service life is prolonged, and the practicability is high.

Drawings

FIG. 1 is a schematic perspective view of a preferred embodiment of a maintenance-free hub bearing for an agricultural machine according to the present invention;

FIG. 2 is a schematic cross-sectional view of the structure of FIG. 1;

the parts in the drawings are numbered as follows: 1. the novel bearing comprises a flange outer ring, 2 roller bearings, 3 connecting shafts, 4 dust covers, 5 LLU sealing rings, 6 sealing shaft sleeves, 7 oil seals, 8O-shaped rings, 9 oil nozzles, 11 square holes, 12 first grooves, 21 inner rings, 22 retainers, 23 rolling bodies, 41 extension plates and 61 second grooves.

Detailed Description

The following detailed description of the preferred embodiments of the present invention, taken in conjunction with the accompanying drawings, will make the advantages and features of the invention easier to understand by those skilled in the art, and thus will clearly and clearly define the scope of the invention.

Referring to fig. 1 and 2, an embodiment of the present invention includes: