A type of agricultural machinery bearing

Abstract

This invention discloses an agricultural machinery bearing, relating to the field of agricultural machinery bearing technology. It includes an outer bearing ring and an inner bearing ring, with the inner bearing ring movably mounted inside the outer bearing ring. A flow-guiding structure is installed between the outer and inner bearing rings. This structure utilizes the centrifugal force generated by the rotation of the inner bearing ring to dislodge mud adhering to it. A discharge structure is provided at the top of the outer bearing ring to expel moisture that has entered the gap between the inner and outer bearing rings. This agricultural machinery bearing, through its flow-guiding structure, can use the centrifugal force generated by the rotation of the inner bearing ring itself to dislodge mud and moisture accidentally adhering to its surface. The dislodged impurities are directly discharged along the guide slope and the flow-guiding slope. Compared to traditional passive sealing structures, this design does not suffer from reduced protective effect due to long-term rotational wear, while also reducing overall processing and installation costs.

Description

Technical Field

[0001] This invention relates to the field of agricultural machinery bearing technology, specifically to an agricultural machinery bearing. Background Technology

[0002] Agricultural machinery operates in complex environments. During rotary tillage, harvesting, and field operations, the equipment is constantly exposed to a mixture of mud, straw, and dust. Existing conventional bearing sealing and protection structures are simple, lack adaptability, and are unable to cope with harsh operating environments. During use, problems such as foreign matter intrusion, rapid component wear, and frequent failures are prone to occur, failing to meet the requirements for continuous and stable operation of agricultural machinery.

[0003] For example, a multi-seal agricultural machinery bearing with announcement number CN218063101U includes an agricultural machinery bearing, which includes an inner ring, an outer ring, and rollers. A sealing device is installed on the surface of the agricultural machinery bearing. The sealing device includes a sealing layer. By installing the sealing device on the surface of the agricultural machinery bearing, the gap between the inner ring and the outer ring of the bearing is blocked by the retaining ring in the sealing device. This prevents external impurities from entering the interior of the agricultural machinery bearing. At the same time, the sealing layer is installed on the side wall of the retaining ring through a heat-conducting ring. The installation ring, the sealing layer, and the retaining ring are combined to form a wrap-around shape, which seals and protects the side wall opening of the agricultural machinery bearing. At the same time, since the material of the sealing layer is a water-swellable water-stop strip, when the sealing layer cannot absorb more water, the sealing layer expands and is directionally squeezed towards the surface of the outer ring under the restriction of the metal mesh, thereby increasing the sealing effect. Thus, it has the characteristics of facilitating the sealing and protection of agricultural machinery bearings.

[0004] For example, a new type of agricultural machinery bearing with announcement number CN105805165A includes an inner bearing ring, an outer bearing ring, and an annular raceway between the inner and outer bearing rings. Balls are arranged in the annular raceway. A shaft hole is located at the center of the inner bearing ring. Oil injection holes are provided through both ends of the inner bearing ring, and oil passages are provided between the oil injection holes and the annular raceway. The oil passages abut against the balls. Several oil injection holes are evenly distributed at equal angles along the circumference of the inner bearing ring through both ends of the inner bearing ring. Each oil injection hole is connected to the annular raceway via an annular hole coaxial with the inner bearing ring. When an oil injection pipe is inserted into the oil injection hole, the lubricating oil flows along the oil passage into the balls, avoiding waste. When disassembling the bearing, a pull rod with a stop block at one end is inserted into the oil injection hole, and the pull rod is pulled to remove the bearing.

[0005] Most of the existing technologies mentioned above improve the overall structure by using a sealing structure to prevent external debris from entering the bearing and affecting its operation. However, the bearing needs to rotate continuously during use, which can easily cause the sealing structure to wear out, reducing the sealing effect of the bearing in the later stages. If a shaft seal or other structure is used, it will lead to increased bearing costs and greater installation difficulty. Summary of the Invention

[0006] The purpose of this invention is to provide an agricultural machinery bearing that solves the problem that conventional sealing structures mentioned in the background art cannot effectively prevent mud and other debris from entering the bearing.

[0007] To achieve the above objectives, the present invention provides the following technical solution: an agricultural machinery bearing, comprising an outer bearing ring and an inner bearing ring, wherein the inner bearing ring is movably mounted inside the outer bearing ring, a cage is provided between the outer bearing ring and the inner bearing ring, and balls are provided inside the cage, a flow guiding structure is installed between the outer bearing ring and the inner bearing ring, and the flow guiding structure utilizes the centrifugal force generated when the inner bearing ring rotates to throw off the mud adhering to the inner bearing ring, and a discharge structure is provided at the top of the outer bearing ring, through which water vapor entering the gap between the inner and outer bearing rings can be discharged.

[0008] Furthermore, the flow guiding structure includes a guiding slope, which is fixedly installed on the top of the inner ring of the bearing, and the guiding slope is inclined upward from the inside to the outside.

[0009] Furthermore, the top inner ring of the bearing outer ring is provided with a flow guiding slope, which is inclined downward from the outside to the inside and is located below the guide slope.

[0010] Furthermore, the discharge structure includes a flow guide channel, the top of the outer ring of the bearing is provided with the flow guide channel, the bottom opening of the flow guide channel is set towards the inner ring of the bearing, the top opening of the flow guide channel extends through to the top of the outer ring of the bearing, and a connecting block is fixedly connected inside the flow guide channel.

[0011] Furthermore, a first annular groove is formed on the upper surface of the outer ring of the bearing, and a protective inclined plate is threadedly connected inside the first annular groove. The protective inclined plate is inclined upward from the outside to the inside, and the top opening of the guide channel is located below the protective inclined plate.

[0012] Furthermore, a second annular groove is formed on the lower surface of the bearing outer ring, and an oil injection port is formed inside the second annular groove, which is connected to the inner cavity of the bearing outer ring.

[0013] Furthermore, a connecting frame is fixedly connected to the bottom of the outer ring of the bearing, and an end cap is installed on the internal thread of the connecting frame. A clamping groove is formed on the outer surface of the end cap.

[0014] Furthermore, a limiting ring is fixedly connected to the surface of the end cap, and the limiting ring is located inside the second annular groove.

[0015] Furthermore, a third annular groove is formed on the lower surface of the outer ring of the bearing. There are two third annular grooves, which are located on the inner and outer sides of the second annular groove, respectively. A rubber ring is installed inside the third annular groove, and the lower surface of the rubber ring is in contact with the surface of the end cover.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] This agricultural machinery bearing, through its flow guiding structure, can use the centrifugal force generated by the rotation of the bearing's inner ring to throw out mud and water vapor that accidentally adhere to the surface of the bearing's inner ring. The impurities thrown out are directly discharged along the cooperation of the guide slope and the flow guiding slope. Compared with the traditional passive sealing structure, it will not reduce the protective effect due to long-term rotational wear, and at the same time, it reduces the overall processing and installation costs.

[0018] Furthermore, through the discharge structure, the water vapor that enters the guide channel will move towards the protective inclined plate under the continuous action of gravity and centrifugal force (the heat generated when the bearing is working will also heat the water vapor and cause it to evaporate). The inclined protective inclined plate can prevent large-volume straw and debris from directly blocking the guide channel, and can also discharge water vapor and other substances.

[0019] Furthermore, the oil injection structure allows for the periodic replenishment of lubricating oil into the bearing cavity through the oil injection port inside the second annular groove, extending the bearing's service life. The end cover is installed by threaded connection with the connecting bracket, making disassembly and maintenance more convenient. Meanwhile, the rubber rings inside the two third annular grooves can seal the connection gap between the end cover and the bearing's outer ring, further reducing the risk of foreign matter intrusion. Combined with the limiting ring, this enhances the overall stability of the structure, ensuring a sealing effect without excessively increasing the difficulty of installation. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0021] Figure 2 This is a schematic diagram of the end cap structure of the present invention;

[0022] Figure 3 This is a schematic diagram of the three-dimensional half-section structure of the present invention;

[0023] Figure 4 This is an enlarged structural diagram of point A in the present invention;

[0024] Figure 5 This is a schematic diagram of the bearing outer ring structure of the present invention;

[0025] Figure 6 This is a schematic diagram of the second annular groove structure of the present invention;

[0026] Figure 7 This is a schematic diagram of the bearing inner ring structure of the present invention;

[0027] Figure 8 This is a schematic diagram of the protective inclined plate structure of the present invention;

[0028] Figure 9 This is a schematic diagram of the confinement ring structure of the present invention.

[0029] In the diagram: 1. Bearing outer ring; 2. Bearing inner ring; 3. Guide ramp; 4. Cage; 5. Ball; 6. First annular groove; 7. Guide ramp; 8. Guide channel; 9. Connecting block; 10. Protective ramp; 11. Connecting frame; 12. End cap; 13. Clamping groove; 14. Second annular groove; 15. Oil inlet; 16. Restricting ring; 17. Third annular groove; 18. Rubber ring. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] Example 1: Please refer to Figures 1-9 The present invention provides the following technical solution: an agricultural machinery bearing, which, in order to solve the problem that conventional sealing structures cannot effectively prevent mud and other debris from entering the bearing, discloses a bearing comprising: an outer bearing ring 1 and an inner bearing ring 2, wherein the inner bearing ring 2 is movably installed inside the outer bearing ring 1.

[0032] A cage 4 is provided between the outer ring 1 and the inner ring 2 of the bearing. The cage 4 contains balls 5. The bearing structure composed of the outer ring 1, the inner ring 2, the cage 4, and the balls 5 is mainly used in bearing parts that are prone to mud protection, such as rotary tiller shafts, tractor wheel half shafts, and wheel hubs. A flow guide structure is installed between the outer ring 1 and the inner ring 2 of the bearing. The flow guide structure uses the centrifugal force generated when the inner ring 2 of the bearing rotates to throw off the mud adhering to the inner ring 2 of the bearing.

[0033] The flow guiding structure includes a guide slope 3, which is fixedly installed on the top of the inner ring 2 of the bearing. The guide slope 3 is inclined upward from the inside out, with an inclination angle of 20-45°. A flow guiding slope 7 is provided on the top inner ring of the outer ring 1 of the bearing. The inclination angle of the flow guiding slope 7 is 20-45°, and it is inclined downward from the outside in. The flow guiding slope 7 is located below the guide slope 3. This combines the agricultural machinery's cutter shaft, rotating shaft, etc., with the inner ring 2 of the bearing. During use, the rotating cutter shaft of a rotary tiller typically rotates at 200-550 rpm. When mud or other substances adhere to the inner ring 2 of the bearing and the shaft, the inner ring 2 of the bearing will rotate. According to the centrifugal force formula F=mω... 2 Common forms for converting r to speed Substituting ω into the equation, we get F=m ( ) 2 r, where F is the centrifugal force, m is the mass of the attached mud, n is the shaft speed, and r is the radius of gyration of the mud (the radius of gyration is taken for a common shaft diameter, r = 0.03m). When the rotational speed of the shaft and the inner ring 2 of the bearing is between 200-550 rpm, the centrifugal force on the mud is approximately 1.34-10.15 times its own weight. Combined with the guide slope 3 on the inner ring 2 of the bearing and the guide slope 7 on the outer ring 1 of the bearing, the mud attached to the inner ring 2 can be thrown off, and the guide slope 3 and guide slope 7... With its inclined design, the ejected mud is thrown out of the bearing along the guide slope 3 and the guide slope 7, preventing mud from accumulating on the bearing and eventually passing through the gap between the outer ring 1 and the inner ring 2 of the bearing to enter the bearing and affect the ball bearing 5 and other structures inside the bearing. Furthermore, the guide slope 3 and the guide slope 7 work together to form a labyrinth sealing structure, which blocks and seals the gap between the inner ring 2 and the outer ring 1 of the bearing, preventing mud and other substances from directly entering the gap between the inner ring 2 and the outer ring 1 of the bearing.

[0034] In practical use, the bearing is installed at a suitable position on the shaft of the agricultural machinery, and the auxiliary shaft rotates. When the shaft rotates, it will carry mud, weeds, dust and other impurities along with it. Through the guide slope 3 and guide slope 7 on the guide structure, when mud and other impurities flow from the shaft to the bearing, they will come into contact with the guide slope 3. After encountering the guide slope 3, the mud will flow outward along the inclined guide slope 3. At the same time, the inner ring 2 of the bearing rotates together with the shaft. With the centrifugal force generated by the shaft rotation, the mud can be thrown outward from the guide slope 3. At the same time, the guide slope 3 and the guide slope 7 form a staggered labyrinth structure, which can further prevent external mud from invading inward. A small amount of mud that enters the gap will also be discharged outward under the guidance of the guide slope 7, and will not accumulate inward into the bearing cavity where the ball 5 is located.

[0035] Example 2: Please refer to Figure 3 , Figure 4 and Figure 5Based on Embodiment 1, a discharge structure is also disclosed, the specific structure of which is as follows: a discharge structure is provided at the top of the outer ring 1 of the bearing, through which water vapor entering the gap between the inner ring 2 and the outer ring 1 of the bearing can be discharged.

[0036] The discharge structure includes a guide channel 8. A guide channel 8 is provided at the top of the outer ring 1 of the bearing. The bottom opening of the guide channel 8 faces the inner ring 2 of the bearing, and the top opening of the guide channel 8 extends through to the top of the outer ring 1. Through the cooperation of the guide slope 3 and the guide slope 7, large-volume impurities such as mud and grass can be blocked. When water vapor passes through the gap between the inner ring 2 and the outer ring 1 of the bearing, the guide channel 8 can temporarily store the water vapor (the retainer 4 between the outer ring 1 and the inner ring 2 of the bearing is coated with lubricating oil during installation, which can temporarily prevent water vapor from entering), preventing water vapor from entering the bearing. Furthermore, when the bearing rotates, the inner ring 2 of the bearing generates heat, which heats the water vapor temporarily stored in the guide channel 8, causing it to evaporate and be discharged from the top of the guide channel 8. The internal fixed connection is a connecting block 9, which can increase the strength of the flow channel 8 and facilitate its long-term use. The upper surface of the bearing outer ring 1 is provided with a first annular groove 6, and the internal thread of the first annular groove 6 is connected to a protective inclined plate 10. The protective inclined plate 10 can be removed from the bearing outer ring 1. When installing the bearing, first install the bearing inner ring 2, cage 4 and ball 5, and then install the protective inclined plate 10. The protective inclined plate 10 is inclined upward from the outside to the inside. The top opening of the flow channel 8 is located below the protective inclined plate 10. The protective inclined plate 10 can prevent external impurities from entering the flow channel 8 from the top. The top of the bearing outer ring 1 is also provided with a protrusion to prevent impurities such as mud from entering from the opening of the protective inclined plate 10. The labyrinth structure formed by the protrusion and the protective inclined plate 10 achieves a protective sealing effect.

[0037] In practical use, when water vapor passes through the labyrinth channel between the guide slope 3 and the flow slope 7, the water vapor will be blocked by the flow channel 8 and remain in the flow channel 8. It will not directly enter the bearing cavity where the ball 5 is located. As the bearing continues to work and generates heat, the water vapor will evaporate and eventually be discharged outward from the top opening of the flow channel 8. The protective slope 10 blocks large particles of impurities from the outside from entering the flow channel 8, while not hindering the normal discharge of water vapor. This ensures the water vapor discharge effect without compromising the overall sealing and protection capabilities.

[0038] Example 3: Please refer to Figure 2 , Figure 3 and Figure 9Based on Embodiment 1, an oil injection structure is also disclosed, the specific structure of which is as follows: A second annular groove 14 is formed on the lower surface of the bearing outer ring 1, and an oil injection port 15 is formed inside the second annular groove 14. The oil injection port 15 is connected to the inner cavity of the bearing outer ring 1. During use, lubricating oil can be added into the bearing outer ring 1 through the oil injection port 15 (using a grease gun or other equipment to add lubricating oil into the bearing outer ring 1; the lubricating oil should be waterproof grease), thereby lubricating the balls 5 in the bearing outer ring 1. At the same time, adding lubricating oil can block external impurities such as mud, preventing mud and other impurities from entering. The end cap 12 is installed inside the bearing and affects the internal components. A connecting bracket 11 is fixedly connected to the bottom of the outer ring 1 of the bearing. An end cap 12 is threaded onto the internal part of the connecting bracket 11. The end cap 12 can be removed from the connecting bracket 11. The diameter of the end cap 12 is larger than the outer diameter of the inner ring 2 of the bearing. When installed, the end cap 12 can limit and protect the end of the shaft. After the end cap 12 is removed, the bearing can be installed in the middle of the shaft for use. (After removing the end cap 12, other parts are needed to seal the oil filling port 15 on the outer ring 1 of the bearing, such as an end cap 12 structure with a through hole in the middle equal to the inner diameter of the inner ring 2 of the bearing.) The outer surface of the end cap 12 is provided with a clamping groove 13. By clamping the workpiece in the clamping groove 13, the workpiece can easily drive the end cap 12 to rotate, thereby allowing the end cap 12 to be installed at the bottom of the bearing outer ring 1. A limiting ring 16 is fixedly connected to the surface of the end cap 12. The limiting ring 16 is located inside the second annular groove 14. The limiting ring 16 is stuck in the second annular groove 14, which can prevent the lubricating oil inside the bearing from leaking from the oil filling port 15 inside the second annular groove 14, ensuring that there is enough lubricating oil inside the bearing for the lubrication of the bearing inner ring 2 and the ball 5 and other components. The lower surface of the bearing outer ring 1 is provided with a first... There are two third annular grooves 17, located on the inner and outer sides of the second annular groove 14 respectively. A rubber ring 18 is installed inside the third annular groove 17, and the lower surface of the rubber ring 18 is in contact with the surface of the end cover 12. The rubber ring 18 in the two third annular grooves 17 can form two rubber sealing structures on the inner and outer sides of the second annular groove 14, which increases the sealing effect between the bearing outer ring 1 and the end cover 12, prevents lubricating oil and other substances from leaking out of the bearing, and also prevents external impurities from entering the bearing from the end cover 12, thereby increasing the sealing effect of the bearing.

[0039] In practical use: When the bearing needs lubrication maintenance, the end cover 12 can be opened, and the grease gun or other lubrication equipment can be aimed at the lubrication port 15 to inject waterproof grease into the inner cavity of the outer ring 1 of the bearing. After adding sufficient lubricating oil, the maintenance can be completed. The lubrication process does not require disassembling the entire bearing structure, making the operation more convenient. Excess old lubricating oil will overflow outward along the gap inside the bearing (excess lubricating oil will be temporarily stored in the guide channel 8, and tools such as towels and iron skewers can be used to clean the guide channel 8 and the overflowing lubricating oil. The lubricating oil temporarily stored in the guide channel 8 can effectively prevent moisture from entering the bearing). At the same time, it can also carry out a small amount of impurities that have entered the bearing. The two rubber rings 18 at the end cover 12, together with the limiting ring 16, can prevent external impurities from entering from the connection gap between the end cover 12 and the outer ring 1 of the bearing while ensuring that the lubricating oil does not leak, thus maintaining a clean working environment inside the bearing and extending the service life of the bearing.

[0040] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0041] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An agricultural machinery bearing, comprising an outer bearing ring (1) and an inner bearing ring (2), wherein the inner bearing ring (2) is movably mounted inside the outer bearing ring (1). Its features are: A retainer (4) is provided between the outer ring (1) and the inner ring (2) of the bearing. A ball bearing (5) is provided inside the retainer (4). A flow guide structure is installed between the outer ring (1) and the inner ring (2) of the bearing. The flow guide structure is used to use the centrifugal force generated when the inner ring (2) of the bearing rotates to throw out the mud attached to the inner ring (2). The top of the outer ring (1) of the bearing is provided with a discharge structure, which can discharge the water vapor that enters the gap between the inner ring (2) and the outer ring (1) of the bearing.

2. The agricultural machinery bearing according to claim 1, characterized in that: The flow guiding structure includes a guiding slope (3), which is fixedly installed on the top of the inner ring (2) of the bearing. The guiding slope (3) is inclined upward from the inside to the outside.

3. The agricultural machinery bearing according to claim 2, characterized in that: The top inner ring of the bearing outer ring (1) is provided with a flow guide slope (7), which is inclined downward from the outside to the inside, and the flow guide slope (7) is located below the guide slope (3).

4. The agricultural machinery bearing according to claim 1, characterized in that: The discharge structure includes a flow channel (8), the top of the bearing outer ring (1) is provided with the flow channel (8), the bottom opening of the flow channel (8) is set towards the bearing inner ring (2), the top opening of the flow channel (8) extends through to the top of the bearing outer ring (1), and a connecting block (9) is fixedly connected inside the flow channel (8).

5. The agricultural machinery bearing according to claim 4, characterized in that: The upper surface of the bearing outer ring (1) is provided with a first annular groove (6), and a protective inclined plate (10) is threaded inside the first annular groove (6). The protective inclined plate (10) is inclined upward from the outside to the inside, and the top opening of the guide channel (8) is located below the protective inclined plate (10).

6. The agricultural machinery bearing according to claim 1, characterized in that: The lower surface of the bearing outer ring (1) is provided with a second annular groove (14), and an oil injection port (15) is provided inside the second annular groove (14). The oil injection port (15) is connected to the inner cavity of the bearing outer ring (1).

7. An agricultural machinery bearing according to claim 6, characterized in that: The bottom of the bearing outer ring (1) is fixedly connected to a connecting frame (11), and an end cap (12) is installed on the internal thread of the connecting frame (11). A clamping groove (13) is opened on the outer surface of the end cap (12).

8. The agricultural machinery bearing according to claim 7, characterized in that: A limiting ring (16) is fixedly connected to the surface of the end cap (12), and the limiting ring (16) is located inside the second annular groove (14).

9. An agricultural machinery bearing according to claim 7, characterized in that: The lower surface of the outer ring (1) of the bearing is provided with a third annular groove (17). There are two third annular grooves (17). The two third annular grooves (17) are located on the inner and outer sides of the second annular groove (14), respectively. A rubber ring (18) is installed inside the third annular groove (17). The lower surface of the rubber ring (18) is in contact with the surface of the end cover (12).

Images