Wheel-side reduction gear and axle

Abstract

The utility model discloses a kind of wheel edge reduction gears and axle, wheel edge reduction gear includes shell, planet carrier, sun gear, planetary gear;One end wall is formed in one end of shell, a through hole is set up on end wall, planet carrier is located in the inside of end wall, sun gear is placed between planet carrier and end wall, planetary gear is pivoted on planet carrier and is engaged with sun gear;A adjusting ring is embedded in the inside of through hole, the adjusting ring is threadedly cooperated with the inner wall of through hole, one thrust bearing is respectively arranged between the both ends of sun gear and planet carrier and adjusting ring.The utility model uses adjusting ring to adjust the axial play of two thrust bearings, under the premise that ensuring that sun gear can rotate flexibly, avoid excessive wear caused by play too small of thrust bearing, in turn make wheel edge reduction gear have higher transmission efficiency and better NVH.

Description

Technical Field

[0001] This utility model relates to the field of commercial vehicle technology, specifically to a wheel-side reducer and axle. Background Technology

[0002] Some commercial vehicles typically have wheel-end reducers installed at the axle ends. These reducers transmit power from the half-shaft to the wheel hub to achieve deceleration and increase torque. To accommodate the layout of the half-shaft and wheel hub in the axle, most wheel-end reducers are planetary reducers. In a planetary reducer, the sun gear is pivotally connected to the reducer housing or planet carrier via a thrust bearing. This makes it impossible to adjust the axial clearance of the thrust bearing, thus affecting the transmission efficiency and NVH (noise, vibration, and harshness) of the wheel-end reducer. Utility Model Content

[0003] To address the shortcomings of existing technologies, the purpose of this utility model is to propose a wheel-side reducer that can precisely adjust the clearance of the thrust bearing at the end of the sun gear, ensuring that the wheel-side reducer has high transmission efficiency and good NVH.

[0004] The second objective of this utility model is to propose a vehicle axle.

[0005] To achieve the first objective mentioned above, this utility model adopts the following technical solution: Wheel-side reducer, including housing, planet carrier, sun gear, and planet gears; One end of the shell forms an end wall with a through hole. The planet carrier is located inside the end wall, and the sun gear is placed between the planet carrier and the end wall. The planet gear is pivotally connected to the planet carrier and meshes with the sun gear. An adjusting ring is embedded inside the through hole, and the adjusting ring is threaded into the inner wall of the through hole. A thrust bearing is provided between each end of the sun gear and the planet carrier and the adjusting ring.

[0006] The adjusting ring has multiple locking parts arranged circumferentially around its periphery, and a locking element is fixed on the outer surface of the end wall. The locking element cooperates with any one of the locking parts to circumferentially position the adjusting ring.

[0007] The locking part is a locking groove formed on the outer surface of the adjusting ring. The locking component includes a connecting end and a locking end. The connecting end is detachably fixed to the outer surface of the end wall. The locking end matches the shape of the locking groove and is embedded in one of the locking grooves.

[0008] The connecting end of the locking component is fixed to the outer surface of the end wall by two or more fastening bolts.

[0009] An end cap is provided on the outer side of the end wall, covering the adjustment ring and the locking element. The outer periphery of the end cap is fixed to the end wall by multiple connecting bolts.

[0010] A first groove is provided on the surface of the planetary carrier facing the end wall, and a second groove is provided on the inner surface of the adjusting ring opposite to the first groove. The seat rings of the two thrust bearings are respectively embedded in the first groove and the second groove, and the shaft rings of the two thrust bearings abut against the shoulders of the two ends of the sun gear.

[0011] The inner diameter of the through hole is R1, the maximum outer diameter of the sun gear is R2, and the maximum outer diameter of the planet gear is R3. R1 is greater than both R2 and R3, so that the sun gear and planet gear can pass through the through hole from the outside of the end wall and be embedded between the planet carrier and the end wall.

[0012] The planetary carrier and the end wall are connected by multiple connecting posts. The planetary carrier, connecting posts and end wall are integrally formed, and an installation space for accommodating the planetary gears is formed between two adjacent connecting posts.

[0013] To achieve the second objective mentioned above, this utility model adopts the following technical solution: Axles, including the aforementioned wheel-side reducers.

[0014] The beneficial effects of this utility model are as follows: In this invention, an adjusting ring is installed on the end wall of the housing. The adjusting ring is threaded with the end wall, which confines the sun gear and the two thrust bearings between the planet carrier and the adjusting ring. The adjusting ring can be used to adjust the axial clearance of the two thrust bearings. While ensuring that the sun gear can rotate flexibly, excessive wear of the thrust bearings caused by too small clearance is avoided, thereby enabling the wheel-side reducer to have higher transmission efficiency and better NVH. Attached Figure Description

[0015] Figure 1 This is an installation diagram of the present invention; Figure 2 This is a schematic diagram of the structure of this utility model; Figure 3 This is a cross-sectional view of the present invention. Detailed Implementation

[0016] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments: like Figure 1 , 2As shown in Figure 3, this utility model discloses a wheel-side reducer, which includes a housing 10, a planetary carrier 20, a sun gear 30, and multiple planetary gears 40. The housing 10 is generally cylindrical, with a connecting flange formed at its inner end. The housing 10 is connected to the wheel hub of the axle using the connecting flange. An end wall 11 is formed at the outer end of the housing 10, and a through hole 12 is provided in the middle of the end wall 11. The planetary carrier 20 is located inside the end wall 11, and is spaced a certain distance from the end wall 11. The planetary carrier 20 and the end wall 11 are fixedly engaged, forming a space between them for accommodating the sun gear 30 and multiple planetary gears 40. The sun gear 30 is placed in the space, so that the sun gear 30 is located between the end wall 11 and the planetary carrier 20. After the multiple planetary gears 40 are placed in the space, the planetary gears 40 are pivotally connected to the planetary carrier 20, and the multiple planetary gears 40 are distributed around the sun gear 30, so that the planetary gears 40 mesh with the sun gear 30. An adjusting ring 50 is embedded inside the through hole 12. The outer edge of the adjusting ring 50 is provided with an external thread, and the inner wall of the through hole 12 is provided with an internal thread. The adjusting ring 50 is screwed into the through hole 12 through the internal and external threads. Rotating the adjusting ring 50 can change the distance between the adjusting ring 50 and the planet carrier 20. A thrust bearing 60 is provided between the outer end of the sun gear 30 and the adjusting ring 50, and a thrust bearing 70 is provided between the inner end of the sun gear 30 and the planet carrier 20. Rotating the adjusting ring 50 causes the adjusting ring 50 to move inward along the axial direction, which can press the thrust bearing 60 inward, and then the sun gear 30 and the planet carrier 20 press the thrust bearing 70. Rotating the adjusting ring 50 in the opposite direction causes the adjusting ring 50 to move outward along the axial direction, which can adjust the thrust bearing 60 and the thrust bearing 70.

[0017] In this invention, since the adjusting ring 50 is installed on the end wall 11 of the housing 10, and the adjusting ring 50 is threadedly engaged with the end wall 11, the sun gear 30 and the two thrust bearings are confined between the planet carrier 20 and the adjusting ring 50. The adjusting ring 50 can be used to adjust the axial clearance of the two thrust bearings. While ensuring that the sun gear 30 can rotate flexibly, excessive wear of the thrust bearings caused by too small clearance is avoided, thereby enabling the wheel-side reducer to have higher transmission efficiency and better NVH.

[0018] In a preferred embodiment, to prevent the adjusting ring 50 from loosening, the present invention provides multiple locking parts around the periphery of the adjusting ring 50, and a locking member 80 is fixed on the outer surface of the end wall 11. The locking member 80 cooperates with any one of the locking parts to circumferentially position the adjusting ring 50. After the adjusting ring 50 is adjusted into place, the locking member 80 cooperates with the corresponding locking part to limit the degree of freedom of the adjusting ring 50 in circumferential movement, preventing the adjusting ring 50 from rotating relative to the end wall 11 and locking the adjusting ring 50. Specifically, the locking part is a locking groove 51 formed on the outer surface of the adjusting ring 50. The locking member 80 includes a connecting end 81 and a locking end 82. The shape of the locking end 82 matches the shape of the locking groove 51. The connecting end 81 is detachably fixed to the outer surface of the end wall 11. After the adjusting ring 50 is adjusted into place, the connecting end 81 is fixed to the outer surface of the end wall 11, and the locking end 82 is embedded into the corresponding locking groove 51. The connecting end 81 of the locking member 80 can be fixed to the outer surface of the end wall 11 by two fastening bolts 83. The number of fastening bolts 83 can be three or more to ensure that the connecting end 81 can be stably fixed to the end wall 11. In other embodiments, the detachable connection between the connecting end 81 of the locking member 80 and the end wall 11 is not limited to the above-described bolt connection structure, but can also be other detachable fixing connection methods.

[0019] An end cover 90 is provided on the outside of the end wall 11, which covers the adjustment ring 50 and the locking member 80. The periphery of the end cover 90 is fixed to the end wall 11 by multiple connecting bolts 91. The end cover 90 provides protection for the adjustment ring 50 and the locking member 80 and prevents dust and moisture from the external environment from entering the interior of the housing 10.

[0020] The planetary carrier 20 has a first groove 22 on the surface facing the end wall, and the adjusting ring 50 has a second groove 52 on the inner surface. The second groove 52 is opposite to the first groove 22. The seat ring 71 of the thrust bearing 70 is embedded in the first groove 22, and its shaft ring 72 abuts against the shoulder 32 of the inner end of the sun gear 30. The seat ring 61 of the thrust bearing 60 is embedded in the second groove 52, and its shaft ring 62 abuts against the shoulder 31 of the outer end of the sun gear 30.

[0021] For ease of installation, the inner diameter of the through hole 12 on the end wall 11 of this utility model is R1, the maximum outer diameter of the sun gear 30 is R2, and the maximum outer diameter of the planet gear 40 is R3. R1 is greater than R2 and R3, so that the sun gear 30 and planet gear 40 can be installed from the outside of the end wall 11 through the through hole 12 into the space formed between the planet carrier 20 and the end wall 11. For example, first place the thrust bearing 60 and thrust bearing 70 at both ends of the sun gear 30, insert the whole into the space through the through hole 12, and finally screw the adjusting ring 50 into the through hole 12 and rotate the adjusting ring 50 to the appropriate position.

[0022] The planetary carrier 20 is connected to the end wall 11 by multiple connecting posts 21. The planetary carrier 20, connecting posts 21, and end wall 11 are integrally formed, that is, the planetary carrier 20 and the housing 10 are integrally formed parts, which can be processed by casting. An installation space is formed between two adjacent connecting posts 21, and the planetary gear 40 is accommodated in the installation space.

[0023] The axle of this utility model includes the wheel-side reducer described above. The other structures of the axle are the same as those in the prior art and will not be described in detail here.

[0024] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A wheel-side reducer, characterized in that, Includes the shell, planet carrier, sun gear, and planet gears; One end of the shell forms an end wall with a through hole. The planet carrier is located inside the end wall, and the sun gear is placed between the planet carrier and the end wall. The planet gear is pivotally connected to the planet carrier and meshes with the sun gear. An adjusting ring is embedded inside the through hole, and the adjusting ring is threaded into the inner wall of the through hole. A thrust bearing is provided between each end of the sun gear and the planet carrier and the adjusting ring.

2. The wheel-side reducer as described in claim 1, characterized in that, The adjusting ring has multiple locking parts arranged circumferentially around its periphery, and a locking element is fixed on the outer surface of the end wall. The locking element cooperates with any one of the locking parts to circumferentially position the adjusting ring.

3. The wheel-side reducer as described in claim 2, characterized in that, The locking part is a locking groove formed on the outer surface of the adjusting ring. The locking component includes a connecting end and a locking end. The connecting end is detachably fixed to the outer surface of the end wall. The locking end matches the shape of the locking groove and is embedded in one of the locking grooves.

4. The wheel-side reducer as described in claim 3, characterized in that, The connecting end of the locking component is fixed to the outer surface of the end wall by two or more fastening bolts.

5. The wheel-side reducer as described in claim 2, characterized in that, An end cap is provided on the outer side of the end wall, covering the adjustment ring and the locking element. The outer periphery of the end cap is fixed to the end wall by multiple connecting bolts.

6. The wheel-side reducer as described in claim 1 or 2, characterized in that, A first groove is provided on the surface of the planetary carrier facing the end wall, and a second groove is provided on the inner surface of the adjusting ring opposite to the first groove. The seat rings of the two thrust bearings are respectively embedded in the first groove and the second groove, and the shaft rings of the two thrust bearings abut against the shoulders of the two ends of the sun gear.

7. The wheel-side reducer as described in claim 1, characterized in that, The inner diameter of the through hole is R1, the maximum outer diameter of the sun gear is R2, and the maximum outer diameter of the planet gear is R3. R1 is greater than both R2 and R3, so that the sun gear and planet gear can pass through the through hole from the outside of the end wall and be embedded between the planet carrier and the end wall.

8. The wheel-side reducer as described in claim 1, characterized in that, The planetary carrier and the end wall are connected by multiple connecting posts. The planetary carrier, connecting posts and end wall are integrally formed, and an installation space for accommodating the planetary gears is formed between two adjacent connecting posts.

9. An axle, characterized in that, Includes the wheel-side reducer as described in any one of claims 1-8.

Images