Automobile hub reduction gear assembly with automatic lubricating mechanism

Abstract

The invention discloses an automobile hub reduction gear assembly with an automatic lubricating mechanism. The automobile hub reduction gear assembly comprises a half shaft, a spline, a first gear, a mounting hole, a first planet carrier, a first cover plate and an impeller. A two-stage speed reduction structure is designed, the second-stage speed reduction mechanism utilizes the movable gear ring to be matched with the fixed sun wheel to drive the planet wheel, the gear ring serves as input, the planet carrier serves as output, and compared with an existing two-stage speed reduction mechanism, the transmission ratio is reduced, and the two-stage speed reduction mechanism can meet application requirements; the impeller is additionally arranged, the impeller is driven by the half shaft rotating at a high speed, and powerful airflow can be generated, so that dissipation of heat in the device is accelerated, the auxiliary heat dissipation function is achieved, and the situation that the device is damaged due to the too high temperature is avoided; the shaft is filled with the solid lubricating oil, the solid lubricating oil is melted through temperature rise of the part, then the part seeps out through the oil outlet holes, lubrication of the part is achieved, and it can be guaranteed that the part is fully lubricated in combination with an existing splash lubrication technology.

Description

Technical Field

[0001] This invention relates to the field of wheel-side reducer technology, specifically to an automotive wheel-side reducer assembly with an automatic lubrication mechanism. Background Technology

[0002] The function of a wheel-side reducer is to increase the driving force of a vehicle to meet or correct the force matching of the entire transmission system. The wheel-side reducer is the last stage of reduction and torque amplification device in the vehicle's transmission system. Using a wheel-side reducer can reduce the load on components such as the transmission, drive shaft, final drive, differential, and half-shafts, while maintaining the same overall gear ratio. It also allows for smaller dimensions and a greater ground clearance for the drive axle. Existing automotive wheel-side reducers have the following drawbacks: First, they generally use splash lubrication to lubricate the gear set, which leads to uneven lubrication, such as insufficient lubrication between gears and gear shafts, or between shafts and bushings. Second, they typically use a sun gear as input, a planetary gear carrier as output, and a fixed ring gear to achieve a large transmission ratio. To further increase the transmission ratio, a reduction unit needs to be connected in series to achieve a two-stage reduction design, but this results in an excessively large transmission ratio that cannot meet application requirements. Third, wheel-side reducers generate a large amount of heat during operation, and current technology lacks auxiliary heat dissipation structures, making them prone to reduced service life due to prolonged exposure to high temperatures. Summary of the Invention

[0003] The purpose of this invention is to provide an automotive wheel-side reducer assembly with an automatic lubrication mechanism to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: an automotive wheel-side reducer assembly with an automatic lubrication mechanism, comprising a half-shaft, a first gear mounted on one end of the half-shaft, a plurality of second gears evenly distributed on the outer side of the first gear, a first cover plate provided at the top of the first gear, a first planetary carrier fixedly connected to the lower surface of the first cover plate, and the second gears installed inside the first planetary carrier, a connecting plate provided at the bottom of the first planetary carrier, a first gear ring fixedly connected to the connecting plate, and the second gears meshing with the first gear ring, a connecting sleeve fitted on the first gear ring, and the connecting sleeve fixedly connected to the first cover plate, a second gear ring fixedly connected inside the connecting sleeve, and the second gear ring located at the bottom of the connecting plate, a plurality of third gears meshing with the inner wall of the second gear ring, a third gear ring fixedly connected to the lower surface of the connecting plate, and the third gears meshing with the third gear ring, a second planetary carrier provided at the bottom of the second gear ring, and the third gears installed inside the second planetary carrier, and a second cover plate fixedly connected to the upper surface of the second planetary carrier.

[0005] Preferably, one end of the half-shaft is provided with a spline, and the inner wall of the first gear is provided with a mounting hole, and the spline is inserted into the mounting hole.

[0006] Preferably, a first bearing is fixedly connected inside the second gear, a first hollow shaft is installed inside the first bearing, one end of the first hollow shaft is disposed on the upper surface of the first planetary carrier, and the other end is disposed on the lower surface of the first cover plate, and a plurality of first oil outlet holes are evenly distributed on the outer wall of the first hollow shaft.

[0007] Preferably, a second bearing is fixedly connected inside the third gear, a second hollow shaft is installed inside the second bearing, one end of the second hollow shaft is located on the upper surface of the second planetary carrier, and the other end is located on the lower surface of the second cover plate. A plurality of second oil outlet holes are evenly distributed on the outer wall of the second hollow shaft.

[0008] Preferably, a bushing is fitted onto the half shaft, a bushing is fixedly connected to the bushing, and the bushing is fixedly connected to the connecting plate.

[0009] Preferably, a hub is fitted onto the bushing, and the hub is fixedly connected to the lower surface of the second planetary carrier. Two third bearings are fixedly connected inside the hub, and the third bearings are fixedly connected to the bushing.

[0010] Preferably, a housing is fitted onto the connecting sleeve, and the housing is fixedly connected to the upper surface of the second planetary carrier.

[0011] Preferably, one end of the half-shaft is fixedly connected to an impeller, and heat sinks are evenly distributed on the outer side of the impeller, and the heat sinks are fixedly connected to the first cover plate.

[0012] Preferably, a dustproof net is fixedly connected inside the housing, and the dustproof net is located at the top of the impeller.

[0013] Preferably, an air inlet is provided on the upper surface of the housing at the position corresponding to the impeller, and multiple air outlets are evenly distributed on the outer side of the air inlet.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: The present invention is designed with a two-stage reduction structure, and the second-stage reduction mechanism uses a moving gear ring to drive the planetary gears with a fixed sun gear, so that the gear ring is the input and the planetary carrier is the output. Compared with the existing two-stage reduction mechanism, the transmission ratio is reduced, making it able to meet application requirements; The present invention adds an impeller, which is driven by a high-speed rotating half-shaft, which can generate a strong airflow to accelerate the dissipation of heat inside the device, realize the auxiliary heat dissipation function, and prevent the device from being damaged due to excessive temperature; The present invention fills the shaft with solid lubricating oil, which melts the parts by heating them up, and then seeps out through the oil outlet to lubricate the parts. Combined with the existing splash lubrication technology, it can ensure sufficient lubrication of the parts. Attached Figure Description

[0015] Figure 1 This is an exploded view of the overall three-dimensional structure of the present invention;

[0016] Figure 2 This is a schematic diagram of the overall three-dimensional structure of the present invention;

[0017] Figure 3 This is a schematic diagram of the overall front view sectional structure of the present invention;

[0018] Figure 4 for Figure 3 Enlarged view of the structure of region A in the middle;

[0019] Figure 5 This is a three-dimensional cross-sectional view of the connecting sleeve of the present invention;

[0020] Figure 6 This is a top view of the overall structure of the present invention;

[0021] Figure 7 This is a schematic diagram of the three-dimensional structure of the impeller of the present invention;

[0022] Figure 8 This is a schematic diagram of the three-dimensional cross-sectional structure of the first gear of the present invention.

[0023] In the diagram: 1. Half shaft; 11. Spline; 12. First gear; 13. Mounting hole; 14. First planetary carrier; 15. First cover plate; 16. First hollow shaft; 17. First oil outlet; 18. First bearing; 19. Second gear; 110. First gear ring; 111. Connecting plate; 112. Connecting sleeve; 113. Second gear ring; 114. Second planetary carrier; 115. Second cover plate; 116. Second hollow shaft; 117. Second oil outlet; 118. Second bearing; 119. Third gear; 120. Third gear ring; 2. Impeller; 21. Heat sink; 22. Dust filter; 3. Bushing; 31. Shaft sleeve; 32. Third bearing; 33. Hub; 34. Housing; 35. Air inlet; 36. Air outlet. Detailed Implementation

[0024] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] Please see Figure 1-8An embodiment of the present invention provides an automotive wheel-side reducer assembly with an automatic lubrication mechanism, comprising a half-shaft 1, a first gear 12 mounted on one end of the half-shaft 1, a plurality of second gears 19 evenly distributed on the outer side of the first gear 12, a first cover plate 15 provided at the top of the first gear 12, a first planetary carrier 14 fixedly connected to the lower surface of the first cover plate 15, and the second gears 19 installed inside the first planetary carrier 14, a connecting plate 111 provided at the bottom of the first planetary carrier 14, a first gear ring 110 fixedly connected to the connecting plate 111, and the second gears 19 meshing with the first gear ring 110, and a connecting sleeve 11 sleeved on the first gear ring 110. 2. The connecting sleeve 112 is fixedly connected to the first cover plate 15. A second gear ring 113 is fixedly connected inside the connecting sleeve 112, and the second gear ring 113 is located at the bottom end of the connecting plate 111. Multiple third gears 119 are meshed on the inner wall of the second gear ring 113. A third gear ring 120 is fixedly connected to the lower surface of the connecting plate 111, and the third gears 119 are meshed on the third gear ring 120. A second planetary carrier 114 is located at the bottom end of the second gear ring 113, and the third gears 119 are installed inside the second planetary carrier 114. A second cover plate 115 is fixedly connected to the upper surface of the second planetary carrier 114. The half-shaft 1 is used to drive the first gear 12. The first gear 12, with its fixed meshing position, drives the second gear 19 via the first gear ring 110. The first planetary carrier 14 and the first cover plate 15 on the second gear 19 move accordingly. This is the first stage of reduction. The first cover plate 15, via the connecting sleeve 112, drives the second gear ring 113. The second gear ring 113, with its fixed meshing position, drives the third gear 119 via the third gear ring 120. The second planetary carrier 114 and the second cover plate 115 on the third gear 119 move accordingly. This is the second stage of reduction. The first gear ring 110 and the second gear ring 113 are internal gear rings, and the third gear ring 120 is an external gear ring. One end of the half-shaft 1 is provided with a spline 11, and the inner wall of the first gear 12 is provided with... The gear 19 has a mounting hole 13, and a spline 11 is inserted into the mounting hole 13. The spline 11 is used to mate with the mounting hole 13 to realize the assembly of the half shaft 1 and the first gear 12. The second gear 19 is fixedly connected to a first bearing 18. The first bearing 18 is installed with a first hollow shaft 16. One end of the first hollow shaft 16 is set on the upper surface of the first planetary carrier 14, and the other end is set on the lower surface of the first cover plate 15. Multiple first oil outlet holes 17 are evenly distributed on the outer wall of the first hollow shaft 16. The first bearing 18 is used to assist the rotation of the second gear 19. The first hollow shaft 16 is used to contain solid lubricating oil, which seeps out through the first oil outlet holes 17 to lubricate the first bearing 18 after being heated.A second bearing 118 is fixedly connected inside the third gear 119. A second hollow shaft 116 is installed inside the second bearing 118. One end of the second hollow shaft 116 is located on the upper surface of the second planetary carrier 114, and the other end is located on the lower surface of the second cover plate 115. Multiple second oil outlet holes 117 are evenly distributed on the outer wall of the second hollow shaft 116. The second bearing 118 is used to assist the rotation of the third gear 119. The second hollow shaft 116 is used to contain solid lubricating oil, which seeps out through the second oil outlet holes 117 after being heated to lubricate the second bearing 118. A bushing 3 is sleeved on the half shaft 1. A bushing 31 is fixedly connected to the bushing 3 and is fixedly connected to the connecting plate 111. The bushing 3 is made of graphite material to achieve self-lubrication between the bushing 31 and the half shaft 1. A hub 33 is sleeved on the bushing 31 and is fixedly connected to the lower surface of the second planetary carrier 114. A wheel hub 33 is fixedly connected inside the hub 33. Two third bearings 32 are fixedly connected to the bushing 31, and the third bearings 32 are used to assist the rotation of the hub 33. A housing 34 is fitted onto the connecting sleeve 112, and the housing 34 is fixedly connected to the upper surface of the second planetary carrier 114. The housing 34 rotates with the second planetary carrier 114 and can protect the internal structure. One end of the half-shaft 1 is fixedly connected to an impeller 2. Heat sinks 21 are evenly distributed on the outer side of the impeller 2, and the heat sinks 21 are fixedly connected to the first cover plate 15. The half-shaft 1 drives the impeller 2, and the impeller 2 generates airflow to accelerate the heat dissipation of the heat sinks 21. A dustproof net 22 is fixedly connected inside the housing 34 and is set at the top of the impeller 2. The dustproof net 22 is used for dust prevention. An air inlet 35 is opened on the upper surface of the housing 34 at the position corresponding to the impeller 2. Multiple air outlets 36 are evenly distributed on the outer side of the air inlet 35. The air inlet 35 is used for air intake, and the air outlets 36 are used for air exhaust.

[0026] Working principle: In use, the invention drives the first gear 12 via the half-shaft 1. The first gear 12, in conjunction with the fixed-position first gear ring 110, drives the second gear 19. The first planetary carrier 14 and the first cover plate 15 on the second gear 19 move accordingly, which is the first stage of reduction. The first cover plate 15 drives the second gear ring 113 via the connecting sleeve 112. The second gear ring 113, in conjunction with the fixed-position third gear ring 120, drives the third gear 119. The second planetary carrier 114 and the second cover plate 115 on the third gear 119 move accordingly, which is the second stage of reduction. The hub 33 and the housing 34 on the second planetary carrier 114 move accordingly. During this process, the half-shaft 1 drives the impeller 2, which generates airflow. The airflow enters from the air inlet 35, blows the heat sink 21, and then exits from the air outlet 36. The heat sink 21 accelerates the dissipation of heat inside the housing 34. The first hollow shaft 16 and the second... The solid lubricating oil inside the hollow shaft 116 begins to melt as the temperature rises, seeping out through the first oil outlet 17 and the second oil outlet 117 to lubricate the first bearing 18 and the second bearing 118. The same technology can be used on the gear ring and gear, by opening a receiving hole to contain the solid lubricating oil and letting it seep out through the seepage hole connected to the receiving hole, thereby achieving lubrication between the gear and the gear ring. This technology can also be combined with splash lubrication technology to ensure sufficient lubrication. Among them, the bushing 3 achieves self-lubrication between the bushing 31 and the half shaft 1. The spline 11 is used to fit the mounting hole 13 to realize the assembly of the half shaft 1 and the first gear 12. The first gear ring 110 and the second gear ring 113 are internal gear rings, the third gear ring 120 is an external gear ring, the dustproof net 22 is used for dust prevention, the connecting plate 111 is used to connect the bushing 31 and the first gear ring 110, and the third bearing 32 is used to assist the rotation of the hub 33.

[0027] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A vehicle wheel-side reducer assembly with an automatic lubrication mechanism, comprising a half-shaft (1), characterized in that: A first gear (12) is installed at one end of the half-shaft (1). Multiple second gears (19) are evenly distributed on the outer side of the first gear (12). A first cover plate (15) is provided at the top of the first gear (12). A first planetary carrier (14) is fixedly connected to the lower surface of the first cover plate (15). The second gears (19) are installed inside the first planetary carrier (14). A connecting plate (111) is provided at the bottom of the first planetary carrier (14). A first gear ring (110) is fixedly connected to the connecting plate (111). The second gears (19) are meshed inside the first gear ring (110). A connecting sleeve (112) is sleeved on the first gear ring (110). A second gear ring (113) is fixedly connected to the first cover plate (15), and the second gear ring (113) is located at the bottom end of the connecting plate (111). Multiple third gears (119) are meshed on the inner wall of the second gear ring (113). A third gear ring (120) is fixedly connected to the lower surface of the connecting plate (111), and the third gears (119) are meshed on the third gear ring (120). A second planetary carrier (114) is located at the bottom end of the second gear ring (113), and the third gears (119) are installed in the second planetary carrier (114). A second cover plate (115) is fixedly connected to the upper surface of the second planetary carrier (114).

2. The automotive wheel-side reducer assembly with an automatic lubrication mechanism according to claim 1, characterized in that: One end of the half shaft (1) is provided with a spline (11), and the inner wall of the first gear (12) is provided with a mounting hole (13), and the spline (11) is inserted into the mounting hole (13).

3. The automotive wheel-side reducer assembly with an automatic lubrication mechanism according to claim 1, characterized in that: The second gear (19) is fixedly connected to a first bearing (18), and a first hollow shaft (16) is installed inside the first bearing (18). One end of the first hollow shaft (16) is located on the upper surface of the first planetary carrier (14), and the other end is located on the lower surface of the first cover plate (15). Multiple first oil outlet holes (17) are evenly distributed on the outer wall of the first hollow shaft (16).

4. The automotive wheel-side reducer assembly with an automatic lubrication mechanism according to claim 1, characterized in that: The third gear (119) is fixedly connected to a second bearing (118), and a second hollow shaft (116) is installed inside the second bearing (118). One end of the second hollow shaft (116) is located on the upper surface of the second planetary carrier (114), and the other end is located on the lower surface of the second cover plate (115). Multiple second oil outlet holes (117) are evenly distributed on the outer wall of the second hollow shaft (116).

5. The automotive wheel-side reducer assembly with an automatic lubrication mechanism according to claim 1, characterized in that: A bushing (3) is fitted onto the half shaft (1), and a bushing (31) is fixedly connected to the bushing (3), and the bushing (31) is fixedly connected to the connecting plate (111).

6. The automotive wheel-side reducer assembly with an automatic lubrication mechanism according to claim 5, characterized in that: A hub (33) is fitted onto the bushing (31), and the hub (33) is fixedly connected to the lower surface of the second planetary carrier (114). Two third bearings (32) are fixedly connected inside the hub (33), and the third bearings (32) are fixedly connected to the bushing (31).

7. The automotive wheel-side reducer assembly with an automatic lubrication mechanism according to claim 1, characterized in that: The connecting sleeve (112) is fitted with a housing (34), and the housing (34) is fixedly connected to the upper surface of the second planetary carrier (114).

8. The automotive wheel-side reducer assembly with an automatic lubrication mechanism according to claim 5, characterized in that: One end of the half shaft (1) is fixedly connected to an impeller (2), and heat sinks (21) are evenly distributed on the outer side of the impeller (2), and the heat sinks (21) are fixedly connected to the first cover plate (15).

9. A vehicle wheel-side reducer assembly with an automatic lubrication mechanism according to claim 7, characterized in that: A dustproof net (22) is fixedly connected inside the housing (34), and the dustproof net (22) is located at the top of the impeller (2).

10. A vehicle wheel-side reducer assembly with an automatic lubrication mechanism according to claim 9, characterized in that: An air inlet (35) is provided on the upper surface of the housing (34) at the position corresponding to the impeller (2), and multiple air outlets (36) are evenly distributed on the outer side of the air inlet (35).

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