Wheel hub bearing with self-lubricating structure

Abstract

The utility model discloses a kind of hub bearings with self-lubricating structure belong to hub bearing technical field, its technical scheme main points include outer ring, the inside of outer ring is provided with inner ring, the surface of inner ring is provided with retainer, the inside of retainer is embedded with rolling body, the inner wall of outer ring is opened with first raceway, the inside of first raceway is provided with self-lubricating mechanism, the self-lubricating mechanism includes oil storage assembly and lubricating assembly, by setting lubricating assembly, the oil tank of lubricating wheel surface can carry lubricating oil, continuously pass lubricating oil to the contact area of rolling body surface and rolling body and raceway in rotation process, this lubrication mode with rolling body motion synchronously, ensure that lubricating oil can accurately act on friction part, avoid the problem of local lubrication deficiency that may appear when artificial grease injection, improve the service life and reliability of bearing.

Description

Technical Field

[0001] This utility model relates to the field of wheel hub bearing technology, and in particular to a wheel hub bearing with a self-lubricating structure. Background Technology

[0002] Wheel bearings are a key component of the automotive chassis system. Their main function is to connect the wheels to the vehicle body. They must bear the vertical weight of the vehicle, transmit driving and braking forces, and ensure the flexible rotation of the wheels, directly affecting the vehicle's driving safety, comfort, and reliability.

[0003] During the operation of wheel hub bearings, there is continuous relative rolling friction between the rolling elements and the raceways of the inner and outer rings. In order to reduce friction and wear, reduce energy consumption, and extend service life, good lubrication of the friction parts is required. Traditional wheel hub bearings usually use grease lubrication, that is, by filling the bearing with grease, the grease relies on the oil film formed on the friction surface to achieve lubrication. However, this traditional lubrication method has certain limitations. On the one hand, the grease will gradually age and deteriorate during long-term use, and it is easy to lose under harsh conditions such as high temperature and high speed, resulting in a decrease in lubrication effect. On the other hand, it is difficult to ensure that the grease is evenly distributed on the raceway and rolling element surface when manually greased, which can easily lead to insufficient local lubrication, thereby aggravating local wear of the bearing and affecting the service life and reliability of the bearing.

[0004] Therefore, a hub bearing with a self-lubricating structure is proposed. Utility Model Content

[0005] The purpose of this invention is to provide a hub bearing with a self-lubricating structure, which can solve the problems that existing greases will gradually age and deteriorate during long-term use, and are prone to leakage under harsh working conditions such as high temperature and high speed, resulting in a decrease in lubrication effect. On the other hand, it is difficult to ensure that the grease is evenly distributed on the raceway and rolling element surface when manually injecting grease, which can easily lead to insufficient local lubrication, thereby causing local wear of the bearing to be aggravated and affecting the bearing's service life and reliability.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a hub bearing with a self-lubricating structure, comprising an outer ring, an inner ring disposed inside the outer ring, a cage disposed on the surface of the inner ring, a rolling element embedded inside the cage, a first raceway formed on the inner wall of the outer ring, a self-lubricating mechanism disposed inside the first raceway, the self-lubricating mechanism comprising an oil storage component and a lubrication component, the lubrication component comprising a rotating shaft, a lubrication wheel fixedly sleeved on the surface of the rotating shaft, the side of the lubrication wheel near the rolling element making rolling contact with the rolling element, an oil groove formed on the surface of the lubrication wheel, the oil groove cooperating with the rolling element.

[0007] Preferably, the oil storage assembly includes an oil storage cavity, which is opened inside the outer ring and located outside the surface of the first raceway.

[0008] Preferably, the inner wall of the first raceway is provided with a plurality of mounting slots, the mounting slots are connected to the oil storage cavity, the rotating shaft is rotatably connected inside the mounting slots, and the side of the lubricating wheel closest to the mounting slots is in contact with the mounting slots.

[0009] Preferably, an oil supply pipe is fixedly connected inside the oil storage cavity, the oil supply pipe extends to the outside of the outer ring and is fixedly connected to an external oil supply device.

[0010] Preferably, the inner ring has a second raceway on its surface, and the rolling element is used in conjunction with the second raceway.

[0011] Preferably, a seal is provided between the outer ring, the inner ring, and the opposite side of the retainer.

[0012] Preferably, a connecting disc is fixedly connected to the outer side of the inner ring, and a connecting bolt is threaded into the inner side of the connecting disc.

[0013] Compared with the prior art, the beneficial effects of this utility model are: 1. By setting up a lubrication component, the oil groove on the surface of the lubrication wheel can carry lubricating oil and continuously transfer the lubricating oil to the surface of the rolling element and the contact area between the rolling element and the raceway during rotation. This lubrication method, which is synchronized with the movement of the rolling element, ensures that the lubricating oil can be accurately applied to the friction parts, avoids the problem of insufficient local lubrication that may occur when manually greases, and improves the service life and reliability of the bearing. 2. By setting up an oil storage component, the oil storage chamber can store a certain amount of lubricating oil. Through the installation channel connected to the oil storage chamber, the lubricating oil can be transported to the vicinity of the lubrication wheel, ensuring that the oil groove of the lubrication wheel always has oil to carry. At the same time, the oil supply pipe connected to the oil storage chamber is connected to an external oil supply device, which can replenish the lubricating oil in the oil storage chamber in a timely manner, avoiding lubrication interruption due to the depletion of lubricating oil, thereby maintaining a good lubrication effect. Attached Figure Description

[0014] Figure 1 This is an overall structural diagram of the wheel hub bearing with a self-lubricating structure according to this utility model. Figure 2 This utility model Figure 1 A schematic diagram of the decomposition process; Figure 3 This is a front sectional view of the outer ring of this utility model; Figure 4 This is a schematic diagram of the structure of the oil storage component of this utility model; Figure 5This is a schematic diagram of the lubrication component of this utility model.

[0015] In the diagram, 1 is the outer ring; 2 is the inner ring; 3 is the cage; 4 is the rolling element; 5 is the first raceway; 6 is the self-lubricating mechanism; 61 is the oil reservoir assembly; 611 is the oil reservoir chamber; 612 is the mounting groove; 613 is the oil supply pipe; 62 is the lubrication assembly; 621 is the rotating shaft; 622 is the lubrication wheel; 623 is the oil groove; 7 is the second raceway; 8 is the connecting disc; and 9 is the connecting bolt. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] Please see Figure 1-5 The present invention provides the following technical solution: A hub bearing with a self-lubricating structure includes an outer ring 1, an inner ring 2 inside the outer ring 1, a cage 3 on the surface of the inner ring 2, a rolling element 4 embedded inside the cage 3, a first raceway 5 on the inner wall of the outer ring 1, a self-lubricating mechanism 6 inside the first raceway 5, the self-lubricating mechanism 6 including an oil storage component 61 and a lubrication component 62, the lubrication component 62 including a rotating shaft 621, a lubrication wheel 622 fixedly sleeved on the surface of the rotating shaft 621, the side of the lubrication wheel 622 near the rolling element 4 making rolling contact with the rolling element 4, and an oil groove 623 on the surface of the lubrication wheel 622, the oil groove 623 cooperating with the rolling element 4.

[0018] In this embodiment: by setting the lubrication assembly 62, the rotating shaft 621 serves as the mounting base and rotation center of the lubrication wheel 622, providing stable support for the lubrication wheel 622. Through its rotatable connection with the mounting slot 612, the lubrication wheel 622 can rotate flexibly, ensuring that it rotates synchronously with the rolling element 4, providing a dynamic carrier for the transfer of lubricating oil. The lubrication wheel 622 can roll into contact with the rolling element 4. When the rolling element 4 rolls within the first raceway 5, it drives the lubrication wheel 622 to rotate around the rotating shaft 621, using its own rotation to hold the lubricating oil provided by the oil storage assembly 61. The lubricant is continuously delivered to the surface of the rolling element 4 and the contact area between the rolling element 4 and the raceway to achieve dynamic lubrication. At the same time, the contact method between the lubricant and the rolling element 4 is gentle and will not interfere with the normal movement of the rolling element 4. The oil groove 623 is formed on the surface of the lubricating wheel 622 to store and carry the lubricating oil. During the rotation of the lubricating wheel 622, the oil groove 623 can hold a certain amount of lubricating oil. As the lubricating wheel 622 contacts the rolling element 4, the lubricating oil is evenly applied to the surface of the rolling element 4, ensuring that the lubricating oil is accurately applied to the friction parts, avoiding waste and uneven lubrication caused by irregular flow of lubricating oil, and improving lubrication efficiency.

[0019] Specifically, such as Figure 3 , Figure 4 As shown, the oil storage assembly 61 includes an oil storage cavity 611, which is opened inside the outer ring 1 and is located outside the surface of the first raceway 5.

[0020] Specifically, such as Figure 3 , Figure 4 As shown, the inner wall of the first raceway 5 is provided with multiple mounting slots 612. The mounting slots 612 are connected to the oil storage cavity 611. The rotating shaft 621 is rotatably connected inside the mounting slots 612, and the side of the lubricating wheel 622 close to the mounting slots 612 is in contact with the mounting slots 612.

[0021] Specifically, such as Figure 4 As shown, an oil supply pipe 613 is fixedly connected inside the oil storage chamber 611. The oil supply pipe 613 extends to the outside of the outer ring 1 and is fixedly connected to an external oil supply device.

[0022] In this embodiment: by setting up an oil storage component 61, the oil storage chamber 611 is used to store lubricating oil. It can hold a certain amount of lubricating oil to continuously provide an oil source for the lubrication component 62, avoiding lubrication interruption due to insufficient lubricating oil. At the same time, its position design does not affect the normal rolling of the rolling element 4 in the first raceway 5, and can efficiently supply oil to the lubrication wheel 622 through the mounting groove 612. The mounting groove 612 can provide installation space for the rotating shaft 621, so that the lubrication wheel 622 can be stably assembled in the first raceway 5 and in contact with the rolling element 4. The mounting groove 612 also serves as... The oil reservoir 611 serves as a channel for lubricating oil to flow from the oil reservoir 611 to the lubricating wheel 622, ensuring that the lubricating oil in the oil reservoir 611 can smoothly reach the surface of the lubricating wheel 622, thus providing a guarantee for the oil storage in the oil trough 623. The oil supply pipe 613 can be connected to an external oil supply device and is a key channel for replenishing lubricating oil. When the amount of lubricating oil in the oil reservoir 611 is insufficient, the external oil supply device can supply lubricating oil to the oil reservoir 611 through the oil supply pipe 613, thereby achieving timely replenishment of lubricating oil and ensuring that the oil reservoir 611 always has a sufficient supply of lubricating oil, maintaining the long-term stable operation of the self-lubricating mechanism 6.

[0023] Specifically, such as Figure 2 As shown, the inner ring 2 has a second raceway 7 on its surface, and the rolling element 4 is used in conjunction with the second raceway 7.

[0024] Specifically, such as Figure 1 , Figure 2 As shown, a seal is provided between the outer ring 1, the inner ring 2, and the opposite side of the retainer 3.

[0025] Specifically, such as Figure 2 As shown, a connecting disc 8 is fixedly connected to the outer side of the inner ring 2, and a connecting bolt 9 is threadedly connected to the inside of the connecting disc 8.

[0026] In this embodiment: With the above configuration, the second raceway 7 is formed on the surface of the inner ring 2, corresponding to the first raceway 5 on the inner wall of the outer ring 1, jointly providing a rolling trajectory for the rolling element 4. When the rolling element 4 rolls between the first raceway 5 and the second raceway 7, the first raceway 5 and the second raceway 7 can limit and guide the rolling element 4, ensuring that the rolling element 4 moves stably along a preset path, preventing the rolling element 4 from deviating or shaking, while dispersing the load borne by the bearing, reducing local wear between the rolling element 4 and the inner ring 2, and improving the bearing capacity and operational stability. The seal is located on the outer ring. The inner ring 1, inner ring 2, and cage 3 on opposite sides form a seal, effectively preventing external dust, moisture, impurities, etc., from entering the bearing. This prevents these contaminants from contaminating the lubricating oil and wearing the rolling elements 4. It also reduces lubricating oil leakage, maintains a stable internal lubrication environment, and extends the service life and lubrication effect of the lubricating oil. The connecting disc 8 is a key structure for connecting the bearing to the wheel hub. The connecting bolt 9 passes through the connecting disc 8 via a threaded connection, which can fix the bearing to the wheel hub and ensure that the bearing and the wheel hub can rotate synchronously.

[0027] Working principle: First, lubricating oil from the external oil supply device is delivered to the oil storage chamber 611 through the oil supply pipe 613 until the oil storage chamber 611 stores an appropriate amount of lubricating oil. At this time, a small amount of lubricating oil will seep into the vicinity of the lubricating wheel 622 through the mounting groove 612 connected to the oil storage chamber 611, preparing for self-lubrication. When the vehicle is moving, the wheel will drive the inner ring 2 to rotate. The second raceway 7 on the surface of the inner ring 2 will start rolling between the rolling element 4 and the first raceway 5 on the inner wall of the outer ring 1 under the constraint of the cage 3. During the rolling process, the rolling element 4 will contact the lubricating wheel 622, thereby driving the lubricating wheel 622 to rotate around the shaft 621. When the lubricating wheel 622 rotates, the oil groove 623 on its surface will carry the oil from the vicinity of the mounting groove 612 through the mounting groove 612. As the lubricating oil seeps out and continues to contact the lubricating wheel 622 with the rolling element 4, the lubricating oil in the oil groove 623 will be evenly coated on the surface of the rolling element 4. When the rolling element 4 rolls in the first raceway 5 and the second raceway 7, it will bring the lubricating oil to the surface of the first raceway 5 and the second raceway 7, so as to achieve continuous lubrication of the contact parts between the rolling element 4 and the first raceway 5 and the second raceway 7, reduce friction and wear. The seal between the outer ring 1, the inner ring 2 and the opposite side of the cage 3 can play a role in preventing external dust, moisture and other impurities from entering the bearing, while reducing internal lubricating oil leakage and maintaining a stable lubrication environment. When the amount of lubricating oil in the oil reservoir 611 is insufficient, the external oil supply device replenishes the lubricating oil to the oil reservoir 611 in a timely manner through the oil supply pipe 613 to ensure that the self-lubrication process is uninterrupted.

[0028] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A hub bearing with a self-lubricating structure, comprising an outer ring (1), characterized in that: The outer ring (1) has an inner ring (2) inside. The inner ring (2) has a retainer (3) on its surface. The retainer (3) has a rolling element (4) embedded inside. The inner wall of the outer ring (1) has a first raceway (5). The first raceway (5) has a self-lubricating mechanism (6) inside. The self-lubricating mechanism (6) includes an oil storage component (61) and a lubrication component (62). The lubrication component (62) includes a rotating shaft (621). A lubrication wheel (622) is fixedly sleeved on the surface of the rotating shaft (621). The lubrication wheel (622) rolls in contact with the rolling element (4) on the side close to the rolling element (4). An oil groove (623) is opened on the surface of the lubrication wheel (622). The oil groove (623) is used in conjunction with the rolling element (4).

2. A hub bearing with a self-lubricating structure according to claim 1, characterized in that: The oil storage assembly (61) includes an oil storage cavity (611), which is located inside the outer ring (1) and outside the surface of the first raceway (5).

3. A hub bearing with a self-lubricating structure according to claim 2, characterized in that: The inner wall of the first raceway (5) is provided with a plurality of mounting slots (612), the mounting slots (612) are connected to the oil storage cavity (611), the rotating shaft (621) is rotatably connected inside the mounting slots (612), and the lubricating wheel (622) is in contact with the mounting slots (612) on the side close to the mounting slots (612).

4. A hub bearing with a self-lubricating structure according to claim 2, characterized in that: An oil supply pipe (613) is fixedly connected inside the oil storage chamber (611). The oil supply pipe (613) extends to the outside of the outer ring (1) and is fixedly connected to an external oil supply device.

5. A hub bearing with a self-lubricating structure according to claim 1, characterized in that: The inner ring (2) has a second raceway (7) on its surface, and the rolling element (4) is used in conjunction with the second raceway (7).

6. A hub bearing with a self-lubricating structure according to claim 1, characterized in that: A seal is provided between the outer ring (1), the inner ring (2), and the cage (3) on opposite sides.

7. A hub bearing with a self-lubricating structure according to claim 1, characterized in that: The outer side of the inner ring (2) is fixedly connected to a connecting plate (8), and the inner thread of the connecting plate (8) is connected to a connecting bolt (9).

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