An axle oil baffle device

Abstract

The utility model discloses an axle oil baffle device, which solves the problems that the oil baffle device in the prior art increases the weight of the axle and has poor heat dissipation effect. The utility model comprises a wheel hub and a shaft body. A first bearing and a second bearing are arranged axially between the shaft body and the wheel hub. A cavity is left between the shaft body and the wheel hub and between the first bearing and the second bearing. Oil baffle rings are arranged on one side of the first bearing facing the cavity and on one side of the second bearing facing the cavity; The oil baffle ring comprises a disc body, and the inner circular edge and the outer circular edge of the disc body are turned over in the same direction to form concentric inner retaining rings and outer retaining rings, and both the inner retaining ring and the outer retaining ring are perpendicular to the disc body. By arranging corresponding oil baffle rings between the inner and outer rings of the axle bearing, the utility model can effectively block the lubricating grease from entering the cavity between the shaft body and the wheel hub, enable the lubricating grease to be retained in the bearing for a long time, and reduce the loss of the lubricating grease. The reinforcing ribs drive the surrounding air to flow, thereby taking away the heat generated by the wheel hub and the bearing, which is beneficial to reducing the temperature and improving the heat dissipation efficiency.

Description

Technical Field

[0001] This utility model relates to the technical field of trailer axle components, and in particular to an oil baffle device. Background Technology

[0002] The wheel hub is the rotating part of the wheel core connected to the inner profile of the tire via a column; that is, the metal component that supports the center of the tire and is mounted on the axle. In traditional trailer wheel hubs, the hub bolts are exposed for a long time. When the trailer is running, the grease inside the bearing can easily flow into the cavity between the axle and the hub, causing the bearing to lack lubrication. The usual practice is to add a large amount of grease into the cavity to replenish the bearing; however, due to the poor fluidity of grease, the replenishing effect of the grease in the cavity between the axle and the hub is extremely limited.

[0003] Currently, most trailer wheel hubs in China lack oil baffles. Existing oil baffles, such as the oil baffle ring for automotive axle hubs (authorization number CN201944271 U), are made of foamed silicone rubber. This oil baffle ring is placed inside the axle hub cavity and matches its shape, closely fitting the bearings on both sides of the hub. This close contact with the inner cavity allows for the pressure of grease onto the bearings, ensuring sustained lubrication. While this type of oil baffle ring provides some oil protection, its large contact area with the axle increases the overall weight of the axle. Furthermore, the high friction between the ring and the axle makes it difficult for heat generated by the hub and bearings to dissipate. Excessive heat can degrade the grease, thus affecting the service life of the oil baffle ring and bearings. Utility Model Content

[0004] To address the shortcomings in the aforementioned background technology, this utility model proposes an axle oil baffle device, which solves the problem that existing oil baffle devices increase the weight of the axle and have poor heat dissipation.

[0005] The technical solution of this utility model is implemented as follows: An axle oil-blocking device includes a hub and an axle body. A first bearing and a second bearing are axially arranged between the axle body and the hub. A cavity is left between the axle body and the hub, and between the first bearing and the second bearing. Oil-blocking rings are provided on the side of the first bearing facing the cavity and on the side of the second bearing facing the cavity. The oil-blocking ring includes a disc body. The inner and outer circular edges of the disc body are flanged in the same direction to form concentric inner and outer retaining rings, both of which are perpendicular to the disc body. This oil-blocking ring can eliminate the need for grease, thus reducing the weight and cost of the axle.

[0006] Further preferably, both the first and second bearings include an inner bearing ring and an outer bearing ring. The outer retaining ring of the oil retaining ring corresponds to the outer bearing ring, and the inner retaining ring of the oil retaining ring is in contact with the inner bearing ring, with a gap between the end face of the inner retaining ring and the end face of the inner bearing ring. The gap width is 0.08~0.12mm; this can prevent wear of the inner retaining ring caused by the rotation of the inner bearing ring.

[0007] Further optimization involves a mounting ring seat on the wheel hub, and several ribs on the outer ring surface of the outer retaining ring, with the ribs having an interference fit with the mounting ring seat. This ensures a stable connection between the outer retaining ring and the wheel hub.

[0008] Further optimized, several ribs are arranged at equal angles along the outer ring surface of the outer retaining ring, and the ribs are semi-conical structures with the tips of the semi-conical structures facing the disc body. After the ribs are interference-fitted, they will generate axial force, which will tightly squeeze the outer retaining ring and the bearing outer ring together.

[0009] Further optimization involves the inner retaining ring, outer retaining ring, and disc forming a U-shaped cavity, with reinforcing ribs arranged in the same direction within the U-shaped cavity; this increases strength while facilitating heat dissipation.

[0010] Further optimization involves an outer retaining ring that is higher than the retaining ring, and both the inner and outer retaining rings have several reinforcing ribs, with the bottom of the reinforcing ribs fixedly connected to the disc body; this increases the strength of the oil retaining ring.

[0011] Further optimization involves setting several reinforcing ribs at equal angles along the circumference of the disc, with the inner end face of the reinforcing ribs being at the same height as the inner retaining ring; this improves strength without affecting the gap between the end face of the inner retaining ring and the end face of the bearing inner ring.

[0012] Further optimization involves a helical curved surface structure for the reinforcing ribs; several reinforcing ribs exhibit the same helical direction. The orthographic projection of the reinforcing ribs is rectangular. The helical curved surface structure of the reinforcing ribs facilitates airflow, thereby dissipating heat generated by the hub and bearings. Since excessively high temperatures can easily degrade the lubricating grease, this structure helps to reduce temperature, thus increasing the service life of the bearings.

[0013] The beneficial effects of this invention are as follows: By setting corresponding oil-blocking rings between the inner and outer rings of the axle bearing, this invention effectively prevents grease from entering the cavity between the axle and the hub, allowing the grease to remain in the bearing for a long time and reducing grease loss. Furthermore, it enables the bearing to receive efficient lubrication for an extended period, reducing bearing wear and temperature rise, minimizing bearing contamination, and increasing bearing life. This invention replaces the traditional method of adding large amounts of grease, eliminating the need for grease filling the cavity between the axle and hub, reducing the overall weight of the axle, thus contributing to weight reduction and significantly saving on grease costs.

[0014] The inner and outer retaining rings of this utility model are set perpendicular to the disc body, so that they can form a "double retaining" structure with the inner and outer rings of the bearing, integrating oil blocking, positioning, sealing and dust prevention, and improving oil blocking efficiency; it saves both processes and parts, and also significantly improves the reliability and maintenance-free cycle of the trailer wheel hub bearing unit.

[0015] As the wheel hub rotates, the curved structure of the reinforcing rib of this invention can drive the surrounding airflow, thereby carrying away the heat generated by the wheel hub and bearing. Since excessively high temperatures can easily degrade the lubricating grease, this structure helps to reduce the temperature, improve heat dissipation efficiency, and thus increase the service life of the bearing. Attached Figure Description

[0016] To more clearly illustrate the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the front view of the oil baffle ring;

[0019] Figure 3 for Figure 2 View from AA direction;

[0020] Figure 4 for Figure 2 Enlarged view of a section at point B in the middle;

[0021] Figure 5 This is a schematic diagram of the oil baffle ring on an isometric projection. Detailed Implementation

[0022] 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.

[0023] Example 1, as shown in the figure, provides an axle oil-blocking device, including a hub 6 and an axle 10. The axle 10 mates with the hub. A first bearing 12 and a second bearing 13 are axially positioned between the axle 10 and the hub 6. A cavity 11 is provided between the axle 10 and the hub 6, and between the first bearing 12 and the second bearing 13. Oil-blocking rings effectively prevent grease from entering the cavity 11 between the axle 10 and the hub 6, allowing the grease to remain in the bearings for a longer period, reducing grease loss. In this embodiment, oil-blocking rings 14 are provided on both the side of the first bearing 12 facing the cavity 11 and the side of the second bearing 13 facing the cavity 11. This eliminates the need for grease to be added to the cavity 11 between the axle 10 and the hub 6, reducing the overall weight of the axle, achieving a lightweighting effect, and significantly saving on grease costs.

[0024] In this embodiment, the oil baffle ring 14 includes a disc body 4. The inner and outer circular edges of the disc body 4 are flanged in the same direction to form a concentric inner baffle ring 1 and an outer baffle ring 2. Both the inner baffle ring 1 and the outer baffle ring 2 are perpendicular to the disc body 4. The steel plate can be formed in one blanking and flanging process, without the need for welding, riveting, or secondary machining. The process is simple and the yield rate is high. The first bearing 12 and the second bearing 13 both include an inner bearing ring 9 and an outer bearing ring 8. The outer baffle ring 2 of the oil baffle ring 14 corresponds to the outer bearing ring 8, and the inner baffle ring 1 of the oil baffle ring 14 is in contact with the inner bearing ring 9. The inner baffle ring 1 fits against the end face of the outer bearing ring, and the outer baffle ring 2 mates with the step of the inner cavity of the wheel hub to form a "double baffle" structure. The bearing is completely clamped in the axial direction to prevent the bearing from moving inside the wheel hub during operation. The inner and outer retaining rings form a narrow and equally wide labyrinth gap with the hub and axle head, requiring oil / grease to make two 90° turns to escape. This provides a sealing effect 1-2 orders of magnitude better than a single flat retaining ring. The labyrinth gap also prevents external mud, water, and dust from entering the bearing cavity, achieving "two-way isolation." Furthermore, the disc body 4 itself acts as a "centrifugal disc," throwing oil back into the bearing cavity during high-speed rotation; the inner and outer retaining rings function as "dams," preventing oil from migrating outwards and inwards.

[0025] Example 2, as shown in the figure, is an axle oil baffle device, further optimized based on Example 1. In this example, the inner baffle ring 1, the outer baffle ring 2, and the disc 4 form a U-shaped cavity, with reinforcing ribs 3 inclined in the same direction within the U-shaped cavity. This oil baffle ring effectively prevents grease from entering the cavity 11 between the axle 10 and the hub 6, allowing the grease to remain in the bearing for a long time, reducing grease loss; at the same time, it allows the bearing to receive efficient lubrication for a long time, reducing bearing wear and temperature rise, reducing bearing contamination, and improving bearing life. The inclined reinforcing ribs 3, as the hub rotates, drive the surrounding airflow, thereby carrying away the heat generated by the hub and bearing. Since excessively high temperatures can easily degrade the grease, this structure helps to reduce the temperature, thus increasing the bearing's service life. The reinforcing ribs 3 are inclined in the same direction as the rotation direction, equivalent to forming multiple miniature centrifugal pump blades in the U-shaped cavity. The centrifugal force component forces the oil back to the bearing cavity along the rib surface, increasing the oil return speed by about 2 times; reducing the residence time of the lubricating oil in the cavity, reducing agitation losses and temperature rise.

[0026] In this embodiment, when the hub 6 rotates, the oil retainer ring and the outer ring 8 of the bearing rotate accordingly, resulting in relative rotation between the inner ring 9 and the outer ring 8. A gap is left between the end face of the inner retainer ring 1 and the end face of the inner ring 9; the gap width is 0.08~0.12mm; preferably 0.1mm, to prevent wear on the retaining edge 1 caused by the rotation of the inner ring 9. Since the commonly used grease for trailer axles is Mobil XHP222, which has high viscosity (220cst at 40℃) and poor fluidity, the grease cannot leak through the 0.1mm gap, thus achieving a sealing effect.

[0027] In this preferred embodiment, the hub 6 is provided with mounting ring seats 7 at both the first and second bearings. The outer ring 2 has several ribs 5 on its outer surface, with the ribs 5 interfering with the mounting ring seats 7. This ensures that the oil baffle ring rotates asynchronously with the hub during rotation. This embodiment uses three ribs as an example. The three ribs 5 are set at equal angles along the outer ring 2, and each rib 5 has a semi-conical structure with its tip facing the disc 4. The interference fit between the ribs 5 and the hub 6, compared to making the retaining edge 1 a single conical structure, reduces the overall deformation caused by the interference fit due to only three points of contact. Since the gap between the inner retaining ring 1 and the bearing inner ring 9 is only 0.1mm, it is very sensitive to deformation; excessive deformation will cause oil leakage. The smaller size of the semi-conical structure of the ribs 5 also saves raw materials, achieving lightweight design. This makes the oil baffle ring lighter, stronger, and more durable in trailer wheel hubs operating under high speed, heavy loads, and long maintenance cycles.

[0028] Example 3, as shown in the figure, is an axle oil baffle device, further optimized based on Example 1 or 2. In this example, the outer retaining ring 2 is higher than the retaining ring 1. Because the widths of the inner bearing ring 9 and the outer bearing ring 8 are different, the height of the retaining edge 2 is greater than the height of the retaining edge 1. The inner retaining ring 1 and the outer retaining ring 2 are provided with several reinforcing ribs 3, and the bottom of the reinforcing ribs 3 is fixedly connected to the disc body 4. The reinforcing ribs can be fixed to the disc body by welding to improve the strength of the entire oil baffle ring. The steel plate flange itself is a cantilevered thin wall in both the radial and axial directions, which is prone to resonance during high-speed rotation. The reinforcing ribs 3 divide the U-shaped cavity into several triangular units, forming a "shell-rib" composite, which improves the circumferential torsional stiffness, increases the critical speed, and prevents the oil baffle ring itself from becoming a noise source.

[0029] In this embodiment, six reinforcing ribs are used as an example. The six reinforcing ribs 3 are set at equal angles along the circumference of the disc body 4, and the inner end face of the reinforcing rib 3 is set at the same height as the inner retaining ring 1. This improves the strength without affecting the gap between the end face of the inner retaining ring and the end face of the bearing inner ring.

[0030] In this embodiment, the reinforcing rib 3 has a helical curved surface structure; several reinforcing ribs 3 have the same helical direction. The orthographic projection of the reinforcing rib 3 is rectangular, increasing the heat dissipation area. The reinforcing rib 3 is a rectangular plate with a helical curved surface structure, which increases the heat dissipation area by 15% to 20%, and at the same time, it carries the heat from the outer ring end face of the bearing to the outer edge of the disc 4 more quickly, and then dissipates the heat through the hub; the triangular structure of the rib provides a "flexible hinge" effect during thermal expansion and contraction, reducing the warping of the disc 4 caused by temperature differences, ensuring a constant labyrinth gap, and maintaining sealing performance over a long period of time.

[0031] In the description of this utility model, it should be understood that the terms "vertical", "horizontal", "up", "down", "front", "back", "left", "right", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0032] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0033] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., 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 vehicle axle oil deflector device comprising a wheel hub (6) and an axle body (10), characterised in that: A first bearing (12) and a second bearing (13) are provided axially between the shaft (10) and the hub (6). A cavity (11) is left between the shaft (10) and the hub (6) and between the first bearing (12) and the second bearing (13). An oil baffle ring (14) is provided on the side of the first bearing (12) facing the cavity (11) and on the side of the second bearing (13) facing the cavity (11). The oil baffle ring (14) includes a disc (4). The inner and outer circular edges of the disc (4) are flanged in the same direction to form a concentric inner baffle ring (1) and an outer baffle ring (2). The inner baffle ring (1) and the outer baffle ring (2) are both perpendicular to the disc (4).

2. The axle oil deflector of claim 1, wherein: The first bearing (12) and the second bearing (13) both include an inner ring (9) and an outer ring (8). The outer ring (2) of the oil baffle (14) corresponds to the outer ring (8). The inner ring (1) of the oil baffle (14) is in contact with the inner ring (9) of the bearing, and there is a gap between the end face of the inner ring (1) and the end face of the inner ring (9).

3. The axle oil shield of claim 2, wherein: The gap width D is 0.08~0.12mm.

4. The axle oil deflector of any one of claims 1-3, wherein: The hub (6) is provided with a mounting ring seat (7), and the outer ring (2) has several ribs (5) on its outer ring surface. The ribs (5) are interference-fitted with the mounting ring seat (7).

5. The axle oil shield of claim 4, wherein: Several ribs (5) are set at equal angles along the outer ring surface of the outer retaining ring (2), and the ribs (5) are semi-conical structures with the tip of the semi-conical structure facing the disc body (4).

6. The axle oil baffle device according to claim 1, 2, or 5, characterized in that: The inner retaining ring (1), the outer retaining ring (2) and the disc body (4) form a U-shaped cavity, and the U-shaped cavity is provided with reinforcing ribs (3) that are inclined in the same direction.

7. The axle oil baffle device according to claim 6, characterized in that: The outer retaining ring (2) is higher than the retaining ring (1), and there are several reinforcing ribs (3) between the inner retaining ring (1) and the outer retaining ring (2). The bottom of the reinforcing ribs (3) is fixedly connected to the disc body (4).

8. The axle oil baffle device according to claim 7, characterized in that: Several reinforcing ribs (3) are set at equal angles along the circumference of the disc body (4), and the inner end face of the reinforcing ribs (3) is set at the same height as the inner retaining ring (1).

9. The axle oil baffle device according to claim 8, characterized in that: The reinforcing rib (3) has a spiral curved surface structure; several reinforcing ribs (3) have the same spiral direction.

10. The axle oil baffle device according to claim 8 or 9, characterized in that: The orthographic projection of the reinforcing rib (3) is a rectangle.

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