Self-lubricating reducer planet carrier and wheel-side reducer equipped with same

Abstract

A self-lubricating reducer planet carrier and a wheel-side reducer equipped with same. The self-lubricating reducer planet carrier comprises a planet carrier body (1) and planet gears (2), wherein several planet pins (3) are fixedly provided on the planet carrier body (1); the planet gears (2) are rotationally mounted on the planet pins (3) by means of bearings (9); an oil storage cavity (4) is provided inside each planet pin (3), and a cavity body of the oil storage cavity (4) extends to the outer side of the planet pin (3) in the direction from the planet pin (3) towards the corresponding bearing (9) to form a first oil through hole (5); and a second oil through hole (6) passing through a central hole of each planet gear (2) is provided inside the planet gear (2). The self-lubricating reducer planet carrier and the wheel-side reducer have a self-lubricating function, achieve a good lubrication effect under the same lubrication conditions, and can solve the problem of poor lubrication caused by a lack of oil when planet carrier gear train components are located above a lubricating oil level.

Description

Self-lubricating planetary reducer carrier and wheel-side reducer equipped with the planetary reducer carrier

[0001] Cross-references to related applications

[0002] This application claims priority to Chinese Patent Application No. 202411506472.4, filed on October 28, 2024, entitled “Self-lubricating reducer planetary carrier and wheel-side reducer equipped with the planetary carrier”, which is incorporated herein by reference in its entirety.

[0003] This application claims priority to Chinese Patent Application No. 202422599231.0, filed on October 28, 2024, entitled "A Planetary Carrier for a Wheel-Side Reducer with Heat Dissipation Function", the entirety of which is incorporated herein by reference. Technical Field

[0004] This application belongs to the field of engineering machinery technology, specifically relating to a self-lubricating reducer planetary carrier and a wheel-side reducer equipped with the planetary carrier. Background Technology

[0005] The wheel-side reducer in the drive system of a mining dump truck is installed in the drive wheels at both ends of the rear axle, serving as the final stage of speed reduction and torque increase in the mine truck drive system. Wheel-side reducers transmit high power and torque, and are generally self-lubricating (oil-churning lubrication), generating significant heat. To reduce power loss and heat generation caused by oil churning, the reducer oil level is typically low. When the rotating planetary gear train is in its low position, the gear meshing and bearings are adequately lubricated below the oil level. However, when the oil level is above the low position, the gear meshing and bearings are lubricated by oil adhering to the surface of the parts. When the lubricating oil temperature rises and its viscosity decreases, the lubricating oil adhering to the parts flows out quickly. This can lead to poor lubrication problems due to insufficient lubrication when the rotating planetary gear train reaches its high position.

[0006] Furthermore, current wheel-side reducers on the market all use natural air cooling on the outer surface of the gearbox, specifically the outer end face of the planetary carrier. However, wheel-side reducers are installed inside the drive tires of mining cars, and the entire housing, except for the outer end face of the planetary carrier, is basically enclosed by the wheel rim, making ventilation difficult. Natural cooling via the outer end face of the planetary carrier is therefore ineffective. Consequently, wheel-side reducers have a relatively high operating equilibrium temperature. During prolonged full-load or overload operation of the mining car, the equilibrium temperature of the wheel-side reducer rises further, causing a decrease in the viscosity of the internal lubricating oil and increasing the risk of damage and failure, such as gear and bearing seizure. Therefore, there is an urgent need for a new planetary carrier for reducers to address the problems of poor lubrication performance, particularly high lubricating oil temperature leading to oil loss and significant component wear, inherent in existing self-lubricating planetary carriers. Summary of the Invention

[0007] This application aims to provide a self-lubricating planetary carrier for a speed reducer and a wheel-side speed reducer equipped with the planetary carrier, in order to solve the problems mentioned in the background art.

[0008] To solve the above-mentioned technical problems, this application is implemented as follows:

[0009] This application provides a self-lubricating reducer planetary carrier, including a planetary carrier body and planetary gears. A plurality of planetary pins are fixedly provided on the planetary carrier body, and planetary gears are rotatably mounted on the planetary pins via bearings. A first oil storage chamber is provided inside the planetary pin, and the cavity of the first oil storage chamber extends along the planetary pin toward the bearing direction to the outside of the planetary pin to form a first oil passage hole. A second oil passage hole is provided inside the planetary gear, penetrating the central hole of the planetary gear.

[0010] According to an embodiment of this application, a self-lubricating reducer planetary carrier is provided. The first oil storage chamber is a hole-like structure with one end closed and the other end open, and the interior is hollow. The opening of the first oil storage chamber extends to the outside of the planetary carrier to form an open end. The cavity of the first oil storage chamber located at the open end is provided with an oil baffle plate. The oil baffle plate has a through hole with a diameter smaller than that of the first oil storage chamber to form an annular oil baffle to restrict the lubricating oil in the first oil storage chamber from flowing out of the opening.

[0011] According to an embodiment of this application, a self-lubricating reducer planetary carrier is provided. The first oil storage chamber is a hole-like structure with one end closed and the other end open, and the interior is hollow. The opening of the first oil storage chamber extends to the outside of the planetary carrier to form an open end. The hole at the open end of the first oil storage chamber is a stepped central hole structure. The diameter of the central hole near the open end is smaller than the diameter of the central hole away from the open end to form an annular oil baffle to restrict the lubricating oil in the first oil storage chamber from flowing out of the opening.

[0012] According to an embodiment of this application, a self-lubricating reducer planetary carrier has two bearings on the outer side of each planetary pin. The two bearings are fixedly installed parallel to each other on the outer side of the planetary pin, and the two bearings are respectively located on both sides of the first oil passage and the second oil passage, with an installation gap between them to form a second oil storage cavity. The first oil passage and the second oil passage are respectively connected to the second oil storage cavity. The central hole wall of the planetary gear has an installation groove at the position corresponding to the two bearings for installing a retaining ring. The two bearings are installed in the central hole of the planetary gear by the outer ring of the bearing abutting against the retaining ring.

[0013] According to an embodiment of this application, a self-lubricating reducer planetary carrier is provided with a plurality of oil holes spaced apart on the wall of the planetary gear central hole at a position corresponding to the first oil passage hole. The plurality of oil holes are evenly distributed around the center of the planetary gear central hole along the circumference to form the second oil passage hole. One end of the second oil passage hole penetrates the center of the planetary gear central hole, and the other end penetrates the root of the planetary gear tooth.

[0014] According to an embodiment of this application, a self-lubricating reducer planetary carrier is provided with a protruding heat dissipation component on the outer end face of the planetary carrier body away from the planetary gear, which is used to increase the heat dissipation area of ​​the outer end face of the planetary carrier.

[0015] According to an embodiment of this application, a self-lubricating reducer planetary carrier is provided. The planetary carrier body includes an outer end plate, a connecting rib plate, and a bottom plate. The outer end plate is integrally formed with the bottom plate through the connecting rib plate. A plurality of mounting grooves are evenly distributed along the central circumference of the outer end plate. A first through hole is provided on the bottom plate at a position corresponding to the mounting groove. A mounting cavity is formed between the mounting groove and the first through hole. The planetary pins are installed in the mounting cavity one by one by abutting against the mounting groove and the first through hole at their two ends, respectively. The closed end of the first oil storage cavity is located on the side of the outer end plate, and the open end is located on the side of the bottom plate.

[0016] According to an embodiment of this application, a self-lubricating reducer planetary carrier is provided. A limiting groove is formed on the pin body near the base plate. A limiting block is provided on the base plate at a position corresponding to the limiting groove. When the planetary pin is installed in the mounting cavity, the limiting block abuts against the limiting groove, thereby restricting the rotational movement of the planetary pin. A pin hole is formed inside the planetary pin. The pin hole located on the mounting groove side forms the closed end of the first oil storage cavity. The pin hole located in the first through hole has an opening connected to the first through hole to form the open end of the first oil storage cavity. A limiting ring is formed in the hole wall of the first through hole to restrict the axial movement of the planetary pin along the mounting cavity.

[0017] According to an embodiment of this application, a self-lubricating reducer planetary carrier is provided. In the case where the self-lubricating reducer planetary carrier includes the heat dissipation component, the heat dissipation component is a heat dissipation fin, and the number of heat dissipation fins is several, with the several heat dissipation fins evenly distributed at intervals along the center circumference of the outer end plate.

[0018] According to an embodiment of this application, a self-lubricating reducer planetary carrier is provided, wherein the heat dissipation fins are vertically mounted on the outer end face; the height of the heat dissipation fins is 2 to 3 times the thickness of the outer end plate.

[0019] According to an embodiment of this application, a self-lubricating reducer planetary carrier is provided in which the spacing between two adjacent heat dissipation fins is not greater than the height of the heat dissipation fins.

[0020] According to an embodiment of this application, a self-lubricating reducer planetary carrier is provided, wherein one end of the heat dissipation fins extends toward the center of the outer end plate to form an inner extension end, and the other end extends toward the outer edge of the outer end plate to form an outer extension end; the inner extension ends of several heat dissipation fins surround a central region whose shape and size are adapted to the size of the sun gear; a detachable solar cover is provided on the outer end plate of the central region, and a threaded hole is provided on the outer side plate of the outer extension end of the heat dissipation fins along the circumference to form an outer flange connected to the torque tube.

[0021] This application provides a wheel-side reducer equipped with a self-lubricating planetary carrier, comprising a gearbox, a sun gear, a torque tube, and a hub. The gearbox has an internal gear ring, and the self-lubricating planetary carrier is rotatably mounted on the gearbox by meshing with the internal gear ring through planet gears, with the inner sides of several planet gears meshing with the sun gear. The outer end plate has threaded holes spaced apart on its outer circumference, and is fixedly connected to the torque tube by connecting bolts. The torque tube is fixedly connected to the hub.

[0022] According to an embodiment of this application, a wheel-side reducer equipped with a self-lubricating reducer planetary carrier is provided, wherein a detachable cover plate is provided on the outer end plate at a position corresponding to the sun gear, and a plurality of magnetic plugs are detachably installed on the outer end plate.

[0023] In the embodiments of this application, the planetary pin is hollow, with a pin hole inside. When the planetary pin is fixedly installed on the planet carrier, the end of the pin hole on the outer end plate side abuts against the mounting groove, forming a closed end, while the opening on the bottom plate side communicates with the first through hole, forming an open end. This creates a first oil storage cavity with an open end and a hollow internal structure within the planetary pin. Additionally, two bearings are fixedly installed on the outer pin body of the planetary pin for rotating the planetary gears. The two bearings are spaced apart on both sides of the first and second oil holes, leaving a mounting gap between them. This creates a second oil storage cavity between the planetary pin, the planetary gear center hole, and the two bearings. This allows the first and second oil storage cavities of the planetary pin to collect oil from the lubrication pool during planet carrier rotation, storing a certain amount of lubricating oil. When the planetary gears reach their highest position, the bearings on the planetary pins, the sun gear, and the internal gear ring meshing with the planetary gears can be lubricated by the lubricating oil in the first and second oil reservoirs through the first and second oil passages under the centrifugal force of the planetary carrier's rotation. The self-lubricating reducer planetary carrier of this invention has a self-lubricating function, providing good lubrication under the same lubrication conditions, and solving the problem of poor lubrication caused by insufficient oil in the planetary carrier gear train components when the lubricating oil level is above the target level.

[0024] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0025] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0026] Figure 1 is a schematic diagram of the wheel-side reducer in Example 2.

[0027] Figure 2 is a schematic diagram of the structure of the planetary carrier body of the self-lubricating reducer in the embodiment.

[0028] Figure 3 is a cross-sectional view of section AA in Figure 2.

[0029] Figure 4 is a schematic diagram of the planetary pins of the planetary carrier of the self-lubricating reducer in the embodiment.

[0030] Figure 5 is a schematic diagram of the planetary gear structure of the wheel-side reducer in the embodiment.

[0031] Figure 6 is a cross-sectional view at point AA in Figure 5.

[0032] Figure 7 is a schematic diagram of the self-lubricating flow direction of the lubricating oil in the wheel-side reducer of this embodiment.

[0033] Reference numerals in the attached drawings: 1. Planetary carrier body; 2. Planetary gear; 3. Planetary pin; 4. First oil reservoir; 5. First oil passage; 6. Second oil passage; 7. Limiting slot; 8. Limiting block; 9. Bearing; 10. Outer end plate; 11. Connecting rib; 12. Base plate; 13. Mounting groove; 14. Heat dissipation fins; 15. Gearbox; 16. Sun gear; 17. Torque tube; 18. Internal gear ring; 19. Cover plate; 20. Magnetic plug. Detailed Implementation

[0034] The embodiments of this application will now be described in detail. Examples of these embodiments are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0035] In the description of this application, it should be understood that the features referred to by the terms "first" and "second" may explicitly or implicitly include one or more of those features.

[0036] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" 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 between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0037] Example 1:

[0038] As shown in Figures 1 to 7, this embodiment provides a self-lubricating reducer planetary carrier, including a planetary carrier body 1 and planetary gears 2. Three planetary pins 3 are fixedly mounted on the planetary carrier body 1, and planetary gears 2 are rotatably mounted on the planetary pins 3 via bearings 9. A first oil reservoir 4 is provided inside the planetary pin 3, and the cavity of the first oil reservoir 4 extends along the planetary pin 3 towards the bearing 9 to the outside of the planetary pin 3, forming a first oil passage 5. A second oil passage 6 penetrating the center hole of the planetary gear 2 is provided inside the planetary gear 2. In this embodiment, both the first oil passage 5 and the second oil passage 6 are straight holes.

[0039] In this embodiment, the first oil storage chamber 4 is a hole-like structure with one end closed and the other end open, and the interior is hollow. The opening of the first oil storage chamber 4 extends to the outside of the planetary carrier to form an open end. An oil baffle is installed in the cavity of the first oil storage chamber 4 at the open end. The oil baffle has a through hole with a diameter smaller than that of the first oil storage chamber 4 to form an annular oil baffle to restrict the lubricating oil in the first oil storage chamber 4 from flowing out of the opening.

[0040] The planetary carrier body 1 of this embodiment includes an outer end plate 10, a connecting stiffener 11, and a bottom plate 12. The outer end plate 10 is integrally formed with the bottom plate 12 through the connecting stiffener 11. Three mounting grooves are evenly distributed along the central circumferential direction on the outer end plate 10. A first through hole is opened on the bottom plate 12 at a position corresponding to the mounting groove. A mounting cavity is formed between the mounting groove and the first through hole. The planetary pin 3 is installed in the mounting cavity one by one by abutting against the mounting groove and the first through hole at both ends. The closed end of the first oil storage cavity 4 is located on the side of the outer end plate 10, and the open end is located on the side of the bottom plate 12.

[0041] In this embodiment, a limiting groove 7 is provided on the pin body of the planetary pin 3 near the base plate 12. A limiting block 8 is provided on the base plate 12 at the position corresponding to the limiting groove 7. When the planetary pin 3 is installed in the mounting cavity, the limiting block 8 abuts against the limiting groove 7, thereby restricting the rotational movement of the planetary pin 3. In this embodiment, a pin hole is provided inside the planetary pin 3. The pin hole in this embodiment is a blind hole with one end open and the other end closed. The hole body of the pin hole located on the mounting groove side and the mounting groove form the closed end of the first oil storage cavity 4. The opening located in the first through hole is connected to the first through hole to form the open end of the first oil storage cavity 4. A limiting ring is provided in the hole wall of the first through hole to restrict the axial movement of the planetary pin 3 along the mounting cavity.

[0042] In this embodiment, there are two bearings 9 on the outer side of each planetary pin 3. The two bearings 9 are fixedly installed on the outer side of the planetary pin 3 in parallel with each other. The two bearings 9 are located on both sides of the first oil passage 5 and the second oil passage 6, with an installation gap between them to form a second oil storage cavity. The first oil passage 5 and the second oil passage 6 are respectively connected to the second oil storage cavity. The central hole wall of the planetary gear 2 is provided with an installation groove 13 at the position corresponding to the two bearings 9 for installing a retaining ring. The two bearings 9 are installed in the central hole of the planetary gear 2 by the outer ring of the bearing 9 abutting against the retaining ring.

[0043] In addition, in this embodiment, three oil holes are spaced apart on the wall of the central hole of the planetary gear 2 at positions corresponding to the first oil passage 5. The three oil holes are evenly distributed around the center of the central hole of the planetary gear 2 to form the second oil passage 6. One end of the second oil passage 6 passes through the central hole of the planetary gear 2, and the other end passes through the root of the planetary gear 2 tooth.

[0044] Example 2:

[0045] The difference between Embodiment 2 and Embodiment 1 is that in Embodiment 2, the first oil reservoir 4 is a hollow, hole-like structure with one end closed and the other end open. The opening of the first oil reservoir 4 extends to the outside of the planetary carrier to form an open end. The hole at the open end of the first oil reservoir 4 is a stepped central hole structure, and the diameter of the central hole near the open end is smaller than the diameter of the central hole away from the open end, forming an annular oil-blocking part to restrict the lubricating oil in the first oil reservoir 4 from flowing out of the opening. In the embodiment, the planetary pin 3 has a pin hole inside. The pin hole in this embodiment is a through hole with both ends open and hollow inside. The opening of the pin hole on the mounting groove side is connected to the mounting groove to form the closed end of the first oil reservoir 4, and the opening on the first through hole is connected to the first through hole to form the open end of the first oil reservoir 4. A limit ring is formed in the hole wall of the first through hole to restrict the axial movement of the planetary pin 3 along the mounting cavity.

[0046] The planetary pin 3 of the self-lubricating reducer planetary carrier provided in this application has a hollow design. The planetary pin 3 has a pin hole inside. When the planetary pin 3 is fixedly installed on the planetary carrier, the end of the pin hole on the outer end plate 10 side abuts against the mounting groove, forming a closed end, while the opening on the bottom plate 12 side communicates with the first through hole, forming an open end. This creates a first oil reservoir 4 with an open end and a hollow internal structure within the planetary pin 3. Furthermore, two bearings 9 are fixedly installed on the outer pin body of the planetary pin 3 for rotating the planetary gear 2. The two bearings 9 are spaced apart on both sides of the first oil hole 5 and the second oil hole 6, leaving an installation gap between them. This creates a second oil reservoir between the planetary pin 3, the center hole of the planetary gear 2, and the two bearings 9. This allows the first and second oil reservoirs of the planetary pin 3 to collect oil from the oil reservoir during planetary carrier rotation, storing a certain amount of lubricating oil. When planetary gear 2 reaches its high position, the bearings 9 on the planetary pins 3, the sun gear 16 and the internal gear ring 18 meshing with the planetary gear 2, can be lubricated by the lubricating oil in the first oil reservoir 4 and the second oil reservoir, which, under the centrifugal force of the planetary carrier rotation, passes through the first oil passage 5 and the second oil passage 6 to lubricate the bearings 9, the sun gear 16 and the internal gear ring 18. The self-lubricating reducer planetary carrier of this invention has a self-lubricating function, providing good lubrication under the same lubrication conditions, and solving the problem of poor lubrication caused by insufficient oil in the planetary carrier gear train components above the lubricating oil level.

[0047] Working Principle: In this embodiment, the self-lubricating planetary carrier of the reducer is rotatably mounted inside the gearbox 15 of the wheel-side reducer. Bolt holes are spaced along the circumference of the outer end face of the planetary carrier, which is connected to the thin-walled torque tube 17 of the reducer via connecting bolts, and finally fixedly connected to the wheel hub to drive the wheel to rotate. The planetary pins 3 of the planetary carrier are fixed in the pin holes of the planetary carrier, and the planetary gears 2 are rotatably mounted on the planetary pins 3 via two mounting bearings 9. The inner sides of the three planetary gears 2 are meshed with a sun gear 16, one end of which is connected to the wheel axle as power input. The planetary carrier meshes with the internal gear ring 18 of the reducer gearbox 15 via the outer sides of the planetary gears 2. The gearbox 15 of the reducer is filled with lubricating oil, and the oil level is between 1 / 6 and 1 / 3 of the diameter of the internal gear ring 18. When the reducer is running, the wheel axle drives the sun gear 16 to input power. The sun gear 16 meshes with the three planetary gears 2, driving the planetary gears 2 to push the planetary pins 3, thereby driving the planetary carrier to rotate, and thus driving the wheel to rotate. During operation, when the planetary pins 3, planetary gears 2, and bearings 9 on the planetary carrier move into the lubrication oil sump, all components, including the planetary pins 3, planetary gears 2, bearings 9, and the meshing parts of planetary gears 2 and the internal gear ring 18, are immersed in the lubrication oil sump, ensuring sufficient lubrication. When planetary gears 2 rotate to the lowest position in the lubrication oil sump of the gearbox 15, the meshing parts of planetary gears 2 and the internal gear ring 18, planetary gears 2, planetary pins 3, and bearings 9 on planetary pins 3 are all submerged below the lubrication oil level, ensuring sufficient lubrication for each component. Simultaneously, lubricating oil is injected into the first oil reservoir 4 inside the planetary pins 3 and the second oil reservoir between the planetary pins 3 and planetary gears 2. When planetary gear 2 rotates to its high position, the meshing points of planetary gear 2 and internal gear ring 18, planetary gear 2, planetary pin 3, and bearing 9 on planetary pin 3 are all above the lubricating oil level. The lubricating oil on the surfaces of these components is thrown out by centrifugal force, causing oil loss. Meanwhile, the oil in the first oil reservoir 4 flows towards the opening end and the first oil passage 5 under the centrifugal force of planetary gear 2's rotation. However, because the opening end of the first oil reservoir 4 has a stepped central hole, and the diameter of the central hole near the opening end is smaller than that away from the opening end, an annular oil-blocking part is formed. This causes the lubricating oil to be blocked by the annular oil-blocking part under centrifugal force, preventing it from flowing from the opening end. Therefore, the lubricating oil in the first oil reservoir 4 is thrown out from the first oil passage 5 due to centrifugal force. It should be noted that an oil baffle plate at the opening end of the first oil reservoir 4 can also achieve the aforementioned oil-blocking effect. The ejected lubricating oil enters the second oil storage chamber to lubricate the bearing 9 of the planetary gear 2. A portion of the lubricating oil, under the action of centrifugal force, enters the center hole of the planetary gear 2 through the second oil passage 6, which can lubricate the meshing points of the planetary gear 2 and the internal gear ring 18, as well as the meshing points of the planetary gear 2 and the sun gear 16, thus achieving a self-lubricating effect.It should be noted here that the lubricating oil originally located in the second oil storage chamber will, under the action of centrifugal force, lubricate the rolling parts of the bearings 9 on both sides and the parts thrown out from the second oil passage 6. At the same time, the lubricating oil in the first oil storage chamber 4 will replenish the lubricating oil in the second oil storage chamber through the first oil passage 5.

[0048] As shown in Figures 1 to 3, the self-lubricating reducer planetary carrier of this embodiment also includes a heat dissipation component. A protruding heat dissipation component is provided on the outer end face of the planetary carrier body 1 away from the planetary gear 2, which is used to increase the heat dissipation area of ​​the outer end face of the planetary carrier.

[0049] The self-lubricating reducer planetary carrier of this application has an outer end face with a raised heat dissipation component. This increases the heat dissipation area of ​​the outer end face, thereby improving the heat dissipation effect of the wheel-side reducer and ensuring that the reducer temperature remains stable during long-term operation of the mine car, reducing component wear. Furthermore, it ensures that the lubricating oil in the gearbox 15 has good heat dissipation during long-term operation of the wheel-side reducer, preventing the lubricating oil viscosity from decreasing due to excessively high oil temperature, thus avoiding a decline in lubrication effect.

[0050] In addition, the heat dissipation component in this embodiment is a heat dissipation fin 14, and the number of heat dissipation fins 14 is several, and the several heat dissipation fins 14 are evenly distributed along the center circumference of the outer end plate 10.

[0051] Furthermore, the heat dissipation fins 14 are vertically mounted on the outer end face; the height of the heat dissipation fins 14 is 2 to 3 times the thickness of the outer end plate 10. In this embodiment, the spacing between two adjacent heat dissipation fins 14 is not greater than the height of the heat dissipation fins 14.

[0052] The heat dissipation component used in this application is a heat dissipation fin 14, which is vertically mounted on the outer end face of the planetary carrier. The heat dissipation fin 14 greatly increases the contact area between the end face of the planetary gear 2 and the air. At the same time, when the planetary carrier rotates with the wheels, the structure of the heat dissipation fin 14 increases the airflow speed on the end face of the planetary carrier, further enhancing the heat dissipation effect, effectively reducing the equilibrium temperature of the reducer, and effectively solving the problem of poor lubrication caused by insufficient oil in the bearings 9 of the planetary gears when the lubrication oil level is above the lubrication oil level. In addition, the shape and size of the heat dissipation fin 14 are scientifically designed, allowing for adaptability to the thickness of the outer end plate 10 of the planetary carrier, and the spacing between two adjacent heat dissipation fins 14 is specified. This allows for the setting of heat dissipation fins 14 that are adapted to actual production requirements, improving the applicability of the product.

[0053] In this embodiment, one end of the heat dissipation fin 14 extends toward the center of the outer end plate 10 to form an inner extension end, and the other end extends toward the outer edge of the outer end plate 10 to form an outer extension end. The inner extension ends of several heat dissipation fins 14 surround a central region whose shape and size are adapted to the size of the sun gear 16. The outer end plate 10 of the central region is provided with a detachable solar cover plate 19, and the outer end plate 10 has a threaded hole along the circumference on the outer side plate of the outer extension end of the heat dissipation fin 14 to form an outer flange that is connected to the torsion tube 171.

[0054] This configuration ensures that the heat dissipation area of ​​the heat dissipation fins 14 is compatible with the movement trajectory area of ​​the planetary gears 2 of the planetary carrier. The sun gear 16 meshes with the inner side of the planetary gears 2, and the inner extension end of the heat dissipation fins 14 can cover the meshing area with the sun gear 16. This not only ensures heat dissipation in the meshing area but also saves on the amount of heat dissipation fins 14 used in manufacturing.

[0055] Working Principle: After the planetary carrier has been running for a certain period of time, the temperature of the lubricating oil begins to rise, as shown in Figure 2. This is due to the presence of heat dissipation fins 14 on the outer end face of the planetary carrier. The height of the heat dissipation fins 14 is approximately 2 to 3 times the thickness of the planetary carrier web. The distance between two adjacent heat dissipation fins 14 is no greater than the height of the heat dissipation fins 14, ensuring sufficient surface area on the end face of the planetary carrier. The heat dissipation fins 14 extend from the center hole of the planetary carrier to the outer flange of the planetary carrier. During operation of the wheel-side reducer, the hot lubricating oil makes full contact with the inner end face of the planetary carrier, transferring heat through heat conduction. The heat is then dissipated through the heat dissipation fins 14 on the outer side of the planetary carrier, which are in full contact with the flowing air. This ensures that the lubricating oil in the gearbox 15 of the reducer maintains a suitable operating temperature, thereby ensuring the normal operation of the planetary carrier components.

[0056] In addition, this embodiment also provides a wheel-side reducer equipped with a self-lubricating reducer planetary carrier, including a gearbox 15, a sun gear 16, a torque tube 17, and a wheel hub. The gearbox 15 is provided with an internal gear ring 18. The self-lubricating reducer planetary carrier is rotatably mounted on the gearbox 15 through the meshing of planet gears 2 with the internal gear ring 18, and the inner sides of the three planet gears 2 mesh with the sun gear 16. The outer edge of the outer end plate 10 is provided with threaded holes at intervals around the circumference, and is fixedly connected to the torque tube 17 by connecting bolts. The torque tube 17 is fixedly connected to the wheel hub.

[0057] A removable cover plate 19 is installed on the outer end plate 10 at a position corresponding to the sun gear 16, and a magnetic plug 20 is removably installed on the outer side of the outer end plate 10.

[0058] It should be noted that a removable cover plate 19 is provided on the outer end plate 10 at the position corresponding to the sun gear 16, which facilitates the disassembly and maintenance of the sun gear 16 and the components from this position. A magnetic plug 20 is removably installed on the outer end plate 10 at the position corresponding to the first pin hole, which can adsorb the wear particles of the lubricating oil inside the components, thereby reducing the contamination of the lubricating oil and the wear of the components caused by contamination, and extending the service life of the components.

[0059] In the description of this specification, references to terms such as "optional implementation" indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0060] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A self-lubricating reducer planetary carrier, comprising a planetary carrier body and planetary gears, wherein a plurality of planetary pins are fixedly disposed on the planetary carrier body, and planetary gears are rotatably mounted on the planetary pins via bearings; a first oil storage chamber is provided inside the planetary pins, the cavity of the first oil storage chamber extends along the planetary pins toward the bearings to the outside of the planetary pins to form a first oil passage hole, and a second oil passage hole is provided inside the planetary gears, penetrating the central hole of the planetary gears.

2. The self-lubricating reducer planetary carrier according to claim 1, wherein, The first oil storage chamber is a hole-like structure with one end closed and the other end open, and the interior is hollow. The opening of the first oil storage chamber extends to the outside of the planetary carrier to form an open end, and the cavity of the first oil storage chamber located at the open end is provided with an oil baffle plate. The oil baffle plate has a through hole with a diameter smaller than that of the first oil storage chamber to form an annular oil baffle to restrict the lubricating oil in the first oil storage chamber from flowing out of the opening.

3. The self-lubricating reducer planetary carrier according to claim 1, wherein, The first oil reservoir is a hollow, hole-like structure with one end closed and the other end open. The opening of the first oil reservoir extends to the outside of the planetary carrier to form an open end. The hole at the open end of the first oil reservoir is a stepped central hole structure. The diameter of the central hole near the open end is smaller than the diameter of the central hole away from the open end to form an annular oil baffle to restrict the lubricating oil in the first oil reservoir from flowing out of the opening.

4. The self-lubricating reducer planetary carrier according to claim 1, wherein, Two bearings are mounted on the outer side of each planetary pin. The two bearings are fixedly installed parallel to each other on the outer side of the planetary pin, and the two bearings are located on both sides of the first oil passage and the second oil passage, with an installation gap between them to form a second oil reservoir. The first oil passage and the second oil passage are respectively connected to the second oil reservoir. The central hole wall of the planetary gear has a mounting groove at the position corresponding to the two bearings for mounting a retaining ring. The two bearings are mounted in the central hole of the planetary gear by abutting against the retaining ring through the outer ring of the bearing.

5. The self-lubricating reducer planetary carrier according to claim 1, wherein, Several oil holes are spaced apart on the wall of the planetary gear center hole at positions corresponding to the first oil passage hole. The several oil holes are evenly distributed around the center of the planetary gear center hole along the circumference to form the second oil passage hole. One end of the second oil passage hole passes through the center hole of the planetary gear, and the other end passes through the root of the planetary gear tooth.

6. The self-lubricating reducer planetary carrier according to claim 1, wherein, The planetary carrier body has a raised heat dissipation component on the outer end face away from the planetary gears to increase the heat dissipation area of ​​the outer end face of the planetary carrier.

7. The self-lubricating reducer planetary carrier according to any one of claims 1 to 6, wherein, The planetary carrier body includes an outer end plate, a connecting stiffener, and a base plate. The outer end plate is integrally formed with the base plate through the connecting stiffener. The outer end plate has a plurality of mounting grooves evenly distributed along the central circumference. The base plate has a first through hole at a position corresponding to the mounting groove. A mounting cavity is formed between the mounting groove and the first through hole. The planetary pin is installed in the mounting cavity one by one by abutting against the mounting groove and the first through hole at both ends. The closed end of the first oil storage cavity is located on the side of the outer end plate, and the open end is located on the side of the base plate.

8. The self-lubricating reducer planetary carrier according to claim 7, wherein, A limiting groove is formed on the pin body near the base plate. A limiting block is provided on the base plate at the position corresponding to the limiting groove. When the planetary pin is installed in the mounting cavity, the limiting block abuts against the limiting groove, thereby restricting the rotational movement of the planetary pin. A pin hole is formed inside the planetary pin. The pin hole located on the mounting groove side forms the closed end of the first oil storage cavity. The pin hole located in the first through hole has an opening that communicates with the first through hole to form the open end of the first oil storage cavity. A limiting ring is formed in the wall of the first through hole to restrict the axial movement of the planetary pin along the mounting cavity.

9. The self-lubricating reducer planetary carrier according to claim 7, wherein, In the case where the self-lubricating reducer planetary carrier includes the heat dissipation component, the heat dissipation component is a heat dissipation fin, and the number of heat dissipation fins is several, with the several heat dissipation fins evenly distributed at intervals along the center circumference of the outer end plate.

10. The self-lubricating reducer planetary carrier according to claim 9, wherein, The heat dissipation fins are vertically mounted on the outer end face; the height of the heat dissipation fins is 2 to 3 times the thickness of the outer end plate.

11. The self-lubricating reducer planetary carrier according to claim 9, wherein, The spacing between two adjacent heat dissipation fins should not exceed the height of the heat dissipation fins.

12. The self-lubricating reducer planetary carrier according to claim 9, wherein, One end of the heat dissipation fin extends toward the center of the outer end plate to form an inner extension end, and the other end extends toward the outer edge of the outer end plate to form an outer extension end. The inner extension ends of several heat dissipation fins enclose a central area whose shape and size are adapted to the size of the solar wheel. The outer end plate of the central area is provided with a detachable solar cover plate, and the outer end plate has a threaded hole along the circumference on the outer side plate of the outer extension end of the heat dissipation fins to form an outer flange that connects to the torsion tube.

13. A wheel-side reducer equipped with a self-lubricating reducer planetary carrier as described in any one of claims 1 to 12, wherein, The device includes a gearbox, a sun gear, a torque tube, and a hub. The gearbox has an internal gear ring. The self-lubricating reducer planetary carrier is rotatably mounted on the gearbox by meshing with the internal gear ring through planetary gears, and the inner sides of several planetary gears mesh with the sun gear. The outer end plate has threaded holes spaced apart on its outer circumference and is fixedly connected to the torque tube by connecting bolts. The torque tube is fixedly connected to the hub.

14. The wheel-side reducer equipped with a self-lubricating planetary carrier according to claim 13, wherein, The outer end plate is provided with a detachable cover plate at the position corresponding to the sun gear, and several magnetic plugs are detachably installed on the outer end plate.

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