Self-lubricating speed reducer planet carrier and hub reduction gear provided with planet carrier

Abstract

The invention relates to the technical field of engineering machinery, in particular to a self-lubricating speed reducer planet carrier and a hub reduction gear provided with the planet carrier. The problems that in the prior art, a speed reducer planet carrier adopting a self-lubricating method is poor in lubricating performance, and particularly lubricating oil is lost and parts are seriously abraded due to the high temperature of the lubricating oil are solved. The planet carrier comprises a planet carrier body and planet wheels. A plurality of planet pins are fixedly arranged on the planet carrier body, and planet wheels are rotationally mounted on the planet pins through bearings; an oil storage cavity is formed in the planet pin, a cavity body of the oil storage cavity extends to the outer side of the planet pin along the planet pin in the direction towards the bearing to form a first oil through hole, and a second oil through hole penetrating through a center hole of the planet wheel is formed in the planet wheel. The self-lubricating speed reducer planet carrier and the hub reduction gear have the self-lubricating function, the lubricating effect is good under the same lubricating condition, and the problem that lubrication is poor due to oil shortage when a planet carrier gear train component is located above the lubricating oil level can be solved.

Description

Technical Field

[0001] The invention relates to the technical field of engineering machinery, and in particular to a self-lubricating reducer planetary carrier and a wheel-side reducer equipped with the planetary carrier. Background Art

[0002] The wheel reducer in the mining dump truck drive system is installed in the drive wheels at both ends of the vehicle's rear axle, and is responsible for the last stage of speed reduction and torque increase in the mining truck drive system. The wheel reducer transmits high power and torque, and is generally self-lubricating (oil stirring lubrication), generating a lot of heat. In order to reduce the power loss and heat caused by oil stirring, the reducer oil level is generally low. When the rotating planetary transmission gear train is at a low position, the gear meshing and bearings can be fully lubricated below the oil level, but when the oil level is above, the gear meshing and bearings are lubricated by the oil hanging on the surface of the parts. When the temperature of the lubricating oil rises and its viscosity decreases, the lubricating oil hanging on the parts loses quickly, resulting in poor lubrication problems caused by the loss of lubricating oil and lack of oil when the rotating planetary gear train moves to a high position.

[0003] In addition, the wheel-side reducer products currently on the market all use the heat dissipation method of natural air cooling through the outer surface of the gear box, that is, the outer end face of the planetary carrier located on the outside to cool the gear box. The wheel-side reducer is installed inside the driving tire of the mine car. Except for the outer end face of the planetary carrier, the rest of the shell is basically wrapped by the rim, which makes ventilation difficult. The heat dissipation effect is not ideal by the natural cooling method of the outer end face of the planetary carrier. Therefore, the operating equilibrium temperature of the wheel-side reducer is relatively high. When the mine car is fully loaded or overloaded for a long time, the equilibrium temperature of the wheel-side reducer further increases, causing the viscosity of the internal lubricating oil to decrease, resulting in an increase in the risk of damage and failure such as bonding of gears and bearings. Therefore, there is an urgent need for a reducer planetary carrier to solve the problem that the reducer planetary carrier using the self-lubricating method in the prior art has poor lubrication performance, especially the high lubricating oil temperature leading to lubricating oil loss and large component wear. Summary of the invention

[0004] The object of the present invention is to provide a self-lubricating reducer planetary carrier and a wheel-side reducer equipped with the planetary carrier to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a self-lubricating reducer planetary carrier, comprising a planetary carrier body and planetary wheels; a plurality of planetary pins are fixedly provided on the planetary carrier body, and planetary wheels are rotatably mounted on the planetary pins through bearings; a first oil storage chamber is provided inside the planetary pin, and the cavity body 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 hole, and a second oil hole is provided inside the planetary wheel and passes through the center hole of the planetary wheel.

[0006] Preferably, the first oil storage chamber is a porous 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 body of the first oil storage chamber located at the open end is provided with an oil baffle plate, and the oil baffle plate is provided with a through hole with an aperture smaller than the aperture of the first oil storage chamber to form an annular oil baffle portion to limit the lubricating oil in the first oil storage chamber from flowing out of the opening.

[0007] Preferably, 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 hole body of the first oil storage chamber located at the open end is a stepped center hole structure, and the aperture of the center hole adjacent to the open end is smaller than the aperture of the center hole away from the open end, so as to form an annular oil baffle to limit the lubricating oil in the first oil storage chamber from flowing out of the opening.

[0008] Preferably, the planetary carrier body includes an outer end plate, a connecting rib plate and a bottom plate, and the outer end plate is integrally formed with the bottom plate through the connecting rib plate; a plurality of mounting grooves are evenly spaced along the central circumferential direction on the outer end plate, and a first through hole is provided on the bottom plate at a position corresponding to the mounting groove, and a mounting cavity is formed between the mounting groove and the first through hole, and 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, and the closed end of the first oil storage cavity is located on the outer end plate side, and the open end is located on the bottom plate side. The first oil storage cavity of the planetary pin of the present invention is formed by providing a pin hole on the planetary pin, and the pin hole of the planetary pin can be a through hole that passes through the planetary pin body, or a blind hole that is open at one end and closed at the other end. When the planetary pin is installed on the planetary carrier, the two ends of the planetary pin can be respectively installed in the mounting cavity formed between the mounting groove and the first through hole, and the two ends of the planetary pin are respectively installed on the planetary carrier, which can improve the installation stability of the planetary pin and avoid displacement of the planetary pin. When the planetary pin of the present invention is installed on the planetary carrier body, the pin hole of the planetary pin, whether it is a through hole or a blind hole, one end installed on the outer end plate side abuts against the installation groove to form a closed end, so as to prevent the lubricating oil in the oil storage chamber from flowing out from the outer end plate side, and the opening installed on the bottom plate side is connected with the first through hole of the bottom plate to form an open end, which is used for injecting lubricating oil into the first oil storage chamber through the open end when the planetary carrier rotates to drive the planetary pin to rotate to the lubricating oil pool.

[0009] Preferably, a limiting slot is provided on the pin body of the planetary pin on the side adjacent to the base plate, and a limiting block is provided at a position of the base plate corresponding to the limiting slot. When the planetary pin is installed in the mounting cavity, the limiting block abuts against the limiting slot to limit the rotational movement of the planetary pin; a pin hole is provided inside the planetary pin, and the hole body located on the mounting groove side constitutes the closed end of the first oil storage cavity, and the hole body located at the first through hole is provided with an opening connected to the first through hole to constitute the open end of the first oil storage cavity, and a limiting ring is provided in the hole wall of the first through hole to limit the axial movement of the planetary pin along the mounting cavity.

[0010] Preferably, there are two bearings on the outside of each planetary pin, and the two bearings are fixedly installed on the outside of the planetary pin in parallel with each other, and the two bearings are respectively located on both sides of the first oil hole and the second oil hole, leaving an installation gap between them to form a second oil storage chamber; the first oil hole and the second oil hole are respectively connected to the second oil storage chamber; installation grooves are opened on the center hole wall of the planetary wheel at positions corresponding to the two bearings for installing retaining rings; the two bearings are installed in the center hole of the planetary wheel through the outer rings of the bearings being stopped by the retaining rings.

[0011] Preferably, a plurality of oil holes are spaced apart at positions on the wall of the center hole of the planetary gear corresponding to the first oil hole, and the plurality of oil holes are evenly spaced along the circumference around the center hole of the planetary gear to form a second oil hole; one end of the second oil hole passes through the center hole of the planetary gear, and the other end passes through the root of the planetary gear tooth.

[0012] Preferably, a heat sink is provided on the outer side of the outer end plate; the heat sink is a heat sink fin, and there are a plurality of heat sink fins, which are evenly spaced along the central circumference of the outer end plate.

[0013] The present invention also provides a wheel-side reducer equipped with a self-lubricating reducer planetary carrier, including a gear box, a sun gear, a torque tube and a wheel hub, the gear box is provided with an inner ring gear, the self-lubricating reducer planetary carrier is rotatably installed on the gear box through the engagement of the planetary wheels with the inner ring gear, and the inner sides of several planetary wheels are engaged with the sun gear; threaded holes are provided at intervals on the outer edge of the outer end plate, which is fixedly connected to the torque tube by connecting bolts, and the torque tube is fixedly connected to the wheel hub.

[0014] Preferably, a detachable cover plate is provided at a position on the outer end plate corresponding to the sun gear, and a plurality of magnet plugs are detachably mounted on the outer end plate.

[0015] Beneficial effects: 1. The planetary pin of the self-lubricating reducer planetary carrier provided by the present invention is hollow in design, and a pin hole is provided inside the planetary pin. When the planetary pin is fixedly installed on the planetary carrier, one end of the pin hole located on the outer end plate side abuts against the installation groove to form a closed end, and the opening located on the bottom plate side is connected to the first through hole to form an open end, thereby forming a first oil storage chamber with an open end and an internal hollow structure in the planetary pin; in addition, the planetary pin is fixedly installed with two bearings on the outer pin body of the planetary pin for rotatable installation of the planetary gear, and the two bearings are installed at intervals on both sides of the first through hole and the second through hole, leaving an installation gap between them, thereby forming a second oil storage chamber between the planetary pin, the center hole of the planetary gear and the two bearings. In this way, when the planetary carrier is rotating and the planetary gear system is immersed in the lubricating oil pool for lubrication, the first oil storage chamber and the second oil storage chamber of the planetary pin scoop oil from the oil pool in the lubricating oil pool, and a certain amount of lubricating oil can be stored. When the planetary gear runs to a high position, the planetary gears in the planetary gear system, the bearings on the planetary pins, and the sun gear and the inner gear ring meshed with the planetary gears can be lubricated through the first oil hole and the second oil hole by the lubricating oil in the first oil storage chamber and the second oil storage chamber under the centrifugal force of the planetary carrier's rotation. The self-lubricating reducer planetary carrier of the present invention has a self-lubricating function, and has a good lubrication effect under the same lubrication conditions, and can solve the problem of poor lubrication of the planetary carrier gear system components due to lack of oil above the lubricating oil level.

[0016] 2. On the basis of the above, the outer end plate of the planetary carrier of the self-lubricating reducer provided by the present invention is provided with heat dissipation fins perpendicular to the end face, which greatly increases the contact area between the end face of the planetary gear and the air. At the same time, when the planetary carrier rotates with the wheel, the fin structure increases the speed of air flow on the end face of the planetary carrier, further enhancing the heat dissipation effect. When the wheel-side reducer is running for a long time, the lubricating oil in the gear box has good heat dissipation, and the viscosity of the lubricating oil will not decrease due to excessively high oil temperature, thereby causing a decrease in the lubrication effect.

[0017] 3. The present invention also provides a wheel-side reducer equipped with a self-lubricating reducer planetary carrier, including a gear box, a sun gear, a torque tube and a wheel hub. The gear box is provided with an inner gear ring, and the self-lubricating reducer planetary carrier is rotatably installed on the gear box through the meshing of the planetary gears with the inner gear ring, and the inner sides of several planetary gears are meshed with the sun gear; threaded holes are provided at intervals on the outer circumference of the outer end plate, which is fixedly connected to the torque tube by connecting bolts, and the torque tube is fixedly connected to the wheel hub. The wheel-side reducer of the present invention adopts heat dissipation fins provided on the outer surface of the gear box, i.e., the outer end plate of the planetary carrier, which increases the heat dissipation area and has a good heat dissipation effect. In addition, a detachable cover plate is provided at a position on the outer end plate corresponding to the sun gear, which is convenient for disassembly and maintenance of the sun gear and components from here, and a magnet plug is detachably installed at a position on the outer end plate opposite to the first pin hole, which can adsorb wear particles of components in the lubricating oil, so as to reduce the pollution of the lubricating oil and the wear of components caused by pollution, and extend the service life of the components. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the wheel-side reducer of Example 2; Figure 2 It is a structural schematic diagram of the self-lubricating reducer planet carrier body of the embodiment; Figure 3 for Figure 2 Sectional view at AA; Figure 4 A schematic structural diagram of a planetary pin of a planetary carrier of a self-lubricating speed reducer according to an embodiment; Figure 5 A schematic structural diagram of a planetary gear of a wheel-side reducer of an embodiment; Figure 6 for Figure 5 Sectional view at AA; Figure 7 It is a schematic diagram of the self-lubricating flow direction of the lubricating oil of the wheel reducer of this embodiment. DETAILED DESCRIPTION

[0019] The technical solution of the present invention is described in detail below with reference to the accompanying drawings, but the protection scope of the present invention is not limited to the embodiments.

[0020] Example 1: Figure 1-Figure 7 As shown: This embodiment provides a self-lubricating reducer planetary carrier, including a planetary carrier body 1 and a planetary wheel 2; three planetary pins 3 are fixedly provided on the planetary carrier body, and the planetary wheel 2 is rotatably mounted on the planetary pin 3 through a bearing 9; a first oil storage cavity 4 is provided inside the planetary pin 3, and the cavity of the first oil storage cavity extends along the planetary pin toward the bearing direction to the outside of the planetary pin to form a first oil hole 5, and a second oil hole 6 is provided inside the planetary wheel 2 that passes through the center hole of the planetary wheel. The first oil hole and the second oil hole in this embodiment are both straight holes.

[0021] The first oil storage chamber 4 of the present embodiment 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, and an oil baffle plate is installed in the cavity of the first oil storage chamber located at the open end, and a through hole with an aperture smaller than the aperture of the first oil storage chamber is opened on the oil baffle plate to form an annular oil baffle portion to limit the lubricating oil in the first oil storage chamber from flowing out of the opening.

[0022] The planetary carrier body 1 of the present embodiment includes an outer end plate 10, a connecting rib plate 11 and a bottom plate 12. The outer end plate 10 is integrally formed with the bottom plate 12 through the connecting rib plate 11. Three mounting grooves are evenly spaced along the center circumferential direction on the outer end plate. A first through hole is opened at a position corresponding to the mounting groove on the bottom plate. 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 both ends respectively. The closed end of the first oil storage cavity is located on the outer end plate side, and the open end is located on the bottom plate side.

[0023] The planetary pin of this embodiment is provided with a limit slot 7 on the pin body adjacent to the bottom plate, and a limit block 8 is provided at a position corresponding to the limit slot. When the planetary pin is installed in the mounting cavity, the limit block 8 abuts against the limit slot to limit the rotational movement of the planetary pin. The planetary pin of this embodiment is provided with a pin hole inside. The pin hole of this embodiment is a blind hole with an open end and a closed end, and is hollow inside. The hole body and the mounting groove on the side of the pin hole constitute the closed end of the first oil storage cavity, and the opening of the first through hole is connected to the first through hole to constitute the open end of the first oil storage cavity, and a limit ring is provided in the hole wall of the first through hole to limit the axial movement of the planetary pin along the mounting cavity.

[0024] In this embodiment, there are two bearings 9 on the outside of each planetary pin, and the two bearings are fixedly installed on the outside of the planetary pin in parallel with each other, and the two bearings are respectively located on both sides of the first oil hole and the second oil hole, with an installation gap between them to form a second oil storage chamber 40; the first oil hole and the second oil hole are respectively connected to the second oil storage chamber; a mounting groove 13 is opened on the center hole wall of the planetary wheel at a position corresponding to the two bearings for installing a retaining ring; the two bearings are installed in the center hole of the planetary wheel through the outer ring of the bearing being stopped by the retaining ring.

[0025] In addition, three oil holes are spaced apart at positions corresponding to the first oil holes on the center hole wall of the planetary gear 2 of this embodiment, and the three oil holes are evenly spaced along the circumference around the center hole of the planetary gear to form a second oil hole; one end of the second oil hole passes through the center hole of the planetary gear, and the other end passes through the root of the planetary gear tooth.

[0026] Furthermore, a heat sink is provided on the outer side of the outer end plate 10 of the present embodiment; the heat sink is a plurality of heat sink fins 14, and the plurality of heat sink fins are evenly spaced along the central circumference of the outer end plate.

[0027] In addition, this embodiment also provides a wheel-side reducer equipped with a self-lubricating reducer planetary carrier, including a gear box 15, a sun gear 16, a torque tube 17 and a wheel hub, the gear box is provided with an inner gear ring 18, the self-lubricating reducer planetary carrier is rotatably mounted on the gear box through the planetary gear 2 meshing with the inner gear ring 18, and the inner sides of the three planetary gears mesh with the sun gear 16; the outer edge of the outer end plate 10 is provided with threaded holes at intervals along the circumference, and is fixedly connected to the torque tube 17 by connecting bolts, and the torque tube 17 is fixedly connected to the wheel hub. Among them, a detachable cover plate 19 is installed at a position corresponding to the sun gear 16 on the outer end plate, and a magnet plug 20 is detachably installed on the outer side of the outer end plate.

[0028] Embodiment 2: The difference between Embodiment 2 and Embodiment 1 is that the first oil storage chamber 4 of Embodiment 2 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 frame to form an open end, and the hole body of the first oil storage chamber located at the open end is a stepped center hole structure, and the aperture of the center hole adjacent to the open end is smaller than the aperture of the center hole away from the open end, so as to form an annular oil baffle to limit the lubricating oil in the first oil storage chamber from flowing out of the opening. The planetary pin of Embodiment 2 is provided with a pin hole inside. The pin hole of this embodiment is a through hole with both ends open and hollow inside. The opening of the pin hole located on the side of the mounting groove is connected with the mounting groove to form the closed end of the first oil storage chamber, and the opening located on the first through hole is connected with the first through hole to form the open end of the first oil storage chamber, and a limit ring is provided in the hole wall of the first through hole to limit the axial movement of the planetary pin along the mounting cavity.

[0029] Working principle: When the wheel reducer of this embodiment is working, the wheel shaft drives the sun wheel to input power, and the sun wheel drives the planet carrier to rotate. When the planet wheel rotates to the low position of the gear box lubricating oil pool, the meshing part between the planet wheel and the inner gear ring, the planet wheel, the planet pin and the bearing on the planet pin are all immersed below the lubricating oil level, and each component can be fully lubricated. At the same time, the lubricating oil will be poured into the first oil storage chamber inside the planet pin and the second oil storage chamber between the planet pin and the planet wheel. When the planetary gear rotates to a high position, the meshing point between the planetary gear and the inner gear ring, the planetary gear, the planetary pin and the bearings on the planetary pin are all above the lubricating oil level. The lubricating oil on the surface of each component will be thrown out under the action of centrifugal force, and the lubricating oil on the surface of the component begins to leak. At this time, the oil in the first oil storage chamber will flow toward the opening end and the first oil hole under the action of the centrifugal force of the planetary gear rotation. However, since a stepped center hole is provided at the opening end of the first oil storage chamber, and since the aperture of the center hole of the stepped center hole near the opening end is smaller than the aperture of the center hole far from the opening end, an annular oil baffle will be formed, causing the lubricating oil to be blocked by the annular oil baffle under the action of centrifugal force and unable to flow from the opening end. Therefore, the lubricating oil in the first oil storage chamber will be thrown out from the first oil hole due to centrifugal force. It should be noted that the oil baffle plate provided at the opening end of the first oil storage chamber can also achieve the aforementioned oil baffle effect. The thrown-out lubricating oil enters the second oil storage chamber to lubricate the planetary gear bearings, and part of the lubricating oil enters the center hole of the planetary gear through the second oil hole under the action of centrifugal force, which can lubricate the meshing parts between the planetary gear and the inner gear ring and the meshing parts between the planetary gear and the sun gear, achieving a self-lubricating effect. It should be noted here that the lubricating oil originally located in the second oil storage chamber will lubricate the bearing rolling elements on both sides and the parts thrown out from the second oil hole under the action of centrifugal force, and at the same time, the lubricating oil in the first oil storage chamber will supplement the lubricating oil in the second oil storage chamber through the first oil hole.

[0030] In addition, the outer side of the outer end plate of the self-lubricating reducer planetary carrier of the wheel-side reducer of this embodiment is designed with cooling fins perpendicular to the end face; the cooling fins greatly increase the contact area between the outer end face of the planetary carrier and the air. At the same time, when the planetary carrier rotates with the wheel, the cooling fin structure increases the air flow speed on the outer end face of the planetary carrier, further enhancing the heat dissipation effect, effectively reducing the balance temperature of the reducer, and effectively solving the problem of poor lubrication of the planetary gear bearings above the lubricating oil level due to lack of oil.

[0031] As above, although the present invention has been shown and described with reference to specific preferred embodiments, it should not be construed as limiting the present invention itself. Various changes may be made to it in form and detail without departing from the spirit and scope of the present invention defined in the appended claims.

Claims

1. A self-lubricating reducer planetary carrier, comprising a planetary carrier body and a planetary gear; characterized in that: A plurality of planetary pins are fixedly provided on the planetary carrier body, and a planetary wheel is rotatably mounted on the planetary pin via a bearing; a first oil storage chamber is provided inside the planetary pin, and the cavity body of the first oil storage chamber extends along the planetary pin toward the bearing to the outside of the planetary pin to form a first oil hole, and a second oil hole is provided inside the planetary wheel and passes through the center hole of the planetary wheel.

2. The self-lubricating reducer planet carrier according to claim 1, characterized in that: 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 body of the first oil storage chamber located at the open end is provided with an oil baffle plate, and the oil baffle plate is provided with a through hole with an aperture smaller than the aperture of the first oil storage chamber to form an annular oil baffle portion to limit the lubricating oil in the first oil storage chamber from flowing out of the opening.

3. The self-lubricating reducer planet carrier according to claim 1, characterized in that: 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 first oil storage chamber is located at the open end. The hole body is a stepped center hole structure, and the aperture of the center hole near the open end is smaller than the aperture of the center hole away from the open end, so as to form an annular oil baffle to limit the lubricating oil in the first oil storage chamber from flowing out of the opening.

4. The self-lubricating reducer planet carrier according to any one of claims 1 to 3, characterized in that: The planetary carrier body includes an outer end plate, a connecting rib plate and a bottom plate, and the outer end plate is integrally formed with the bottom plate through the connecting rib plate; a plurality of mounting grooves are evenly spaced along the center circumferential direction on the outer end plate, and a first through hole is opened at a position corresponding to the mounting groove on the bottom plate, and a mounting cavity is formed between the mounting groove and the first through hole, and 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 respectively, and the closed end of the first oil storage cavity is located on the outer end plate side, and the open end is located on the bottom plate side.

5. The self-lubricating reducer planet carrier according to claim 4, characterized in that: A limit slot is provided on the pin body of the planetary pin on one side adjacent to the base plate, and a limit block is provided at a position of the base plate corresponding to the limit slot. When the planetary pin is installed in the mounting cavity, the limit block abuts against the limit slot to limit the rotational movement of the planetary pin; a pin hole is provided inside the planetary pin, and the hole body of the pin hole located on the mounting groove side constitutes the closed end of the first oil storage cavity, and the hole body located at the first through hole is provided with an opening connected to the first through hole to constitute the open end of the first oil storage cavity, and a limit ring is provided in the hole wall of the first through hole to limit the axial movement of the planetary pin along the mounting cavity.

6. The self-lubricating reducer planet carrier according to claim 1, characterized in that: There are two bearings on the outside of each planetary pin, and the two bearings are fixedly installed on the outside of the planetary pin in parallel with each other, and the two bearings are respectively located on both sides of the first oil hole and the second oil hole, with an installation gap between them to form a second oil storage chamber; the first oil hole and the second oil hole are respectively connected to the second oil storage chamber; installation grooves are opened on the center hole wall of the planetary wheel at positions corresponding to the two bearings for installing retaining rings; the two bearings are installed in the center hole of the planetary wheel through the outer rings of the bearings being stopped by the retaining rings.

7. The self-lubricating reducer planet carrier according to claim 1, characterized in that: A plurality of oil holes are arranged at intervals on the wall of the center hole of the planetary gear at positions corresponding to the first oil holes, and the plurality of oil holes are evenly spaced along the circumference around the center hole of the planetary gear to form the second oil hole; one end of the second oil hole passes through the center hole of the planetary gear, and the other end passes through the root of the planetary gear tooth.

8. The self-lubricating reducer planet carrier according to claim 4, characterized in that: A heat sink is disposed on the outer side of the outer end plate; the heat sink is a heat sink fin, and the number of the heat sink fins is several, and the several heat sink fins are evenly spaced and arranged along the central circumference of the outer end plate.

9. A wheel reducer equipped with a self-lubricating reducer planet carrier according to any one of claims 1 to 8, characterized in that: It includes a gearbox, a sun gear, a torque tube and a wheel hub. The gearbox is provided with an inner gear ring. The self-lubricating reducer planetary carrier is rotatably installed on the gearbox through the meshing of the planetary gears with the inner gear ring, and the inner sides of several planetary gears are meshed with the sun gear. The outer edge of the outer end plate is provided with threaded holes at intervals along the circumference, which are fixedly connected to the torque tube by connecting bolts, and the torque tube is fixedly connected to the wheel hub.

10. The wheel reducer equipped with a self-lubricating reducer planet carrier according to claim 9, characterized in that: A detachable cover plate is provided at a position on the outer end plate corresponding to the sun gear, and a plurality of magnet plugs are detachably mounted on the outer end plate.

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