CN220555298U - Driving axle wheel edge assembly and engineering machinery - Google Patents

Abstract

The disclosure relates to a drive axle wheel assembly and engineering machinery comprising the same. The driving axle wheel side assembly comprises a flange shaft and a planetary gear set. The flange shaft comprises a flange shaft main body and a flange shaft side wall, wherein the flange shaft main body extends to one side along the axial direction of the flange shaft side wall from the center of the flange shaft side wall; the planetary gear set comprises a planetary gear shell which is engaged with the side wall of the flange shaft and a planetary gear carrier which is engaged with the main body of the flange shaft, the main body of the flange shaft penetrates through the planetary gear shell and is fastened with the planetary gear shell through a fastening nut, an anti-rotation mechanism is arranged on the end face of one side, close to the fastening nut, of the planetary gear carrier, and when the planetary gear carrier is engaged with the main body of the flange shaft, the anti-rotation mechanism is matched with the fastening nut. The driving axle wheel side assembly disclosed by the disclosure can prevent the problems of abnormal abrasion of a bearing, failure of a driving axle, hub falling and the like caused by loosening of the fastening nut through the cooperation of the anti-rotation mechanism and the fastening nut.

Description

Driving axle wheel edge assembly and engineering machinery

Technical Field

The disclosure relates to the technical field of parts of engineering machinery, in particular to a driving axle wheel side assembly and engineering machinery comprising the driving axle wheel side assembly.

Background

The wheel edge component of the driving axle of engineering machinery such as a loader, a bulldozer, an excavator and the like is the last-stage speed and torque reducing mechanism in the whole engineering machinery driving system, and the wheel edge component has the effects of mainly transmitting the rotating speed and torque transmitted by the main speed reducer assembly of the driving axle to wheels through further speed reduction and distance increase, and improving the transmission efficiency, so that the wheels generate larger driving force under the reaction of the ground attachment force, the stress of all parts of the wheel edge component is reduced, and the operation and walking requirements of the whole engineering machinery are met.

In the prior art, the rim assembly mainly includes a planetary gear set and a flange shaft disposed in a housing, wherein the flange shaft includes a flange shaft sidewall and a flange shaft body extending in an axial direction from a center of the flange shaft sidewall, the flange shaft body passing through the housing and being tapered roller bearings to reduce friction with the housing. The relative positions of the flange shaft main body, the shell and the planetary gear set are fixed through the lock nut, so that the working gap of the tapered roller bearing is fixed. However, in the working process of the drive axle, as the hub assembly needs to bear a large load, the locking nut is easy to loosen, so that the working clearance of the tapered roller bearing is increased, abnormal abrasion of the tapered roller bearing is caused, the gear engagement between gears of the hub assembly is abnormal, the drive axle is invalid, and even the hub is separated after the locking nut is loosened, so that accidents are caused.

Disclosure of Invention

The present disclosure is directed to solving at least one of the problems set forth above and/or other problems in the prior art.

To achieve the above object, according to one aspect of the present disclosure, there is provided a transaxle rim assembly including a flange shaft and a planetary gear set. The flange shaft comprises a flange shaft main body and a flange shaft side wall which are coaxially arranged, and the flange shaft main body extends to one side along the axial direction of the flange shaft side wall from the center of the flange shaft side wall; the planetary gear set comprises a planetary gear shell body which is engaged with the side wall of the flange shaft and a planetary gear carrier which is engaged with the flange shaft body, at least one part of the flange shaft body penetrates through the planetary gear shell and is fastened with the planetary gear shell into a whole through a fastening nut, an anti-rotation mechanism is arranged on one side end face of the planetary gear carrier, which is close to the fastening nut, and when the planetary gear carrier is engaged with the flange shaft body, the anti-rotation mechanism is matched with the fastening nut.

According to an embodiment of the present disclosure, the planetary gear set further includes a plurality of planetary gears, the planetary carrier is provided with a plurality of first shaft holes for respectively mounting the plurality of planetary gears, and the anti-rotation mechanism is disposed between two adjacent first shaft holes.

According to an embodiment of the present disclosure, the anti-rotation mechanism includes at least one anti-rotation piece disposed between at least one pair of adjacent two first shaft holes, the outer circumference of the fastening screw has at least one plane, and the anti-rotation piece abuts against the plane.

According to an embodiment of the present disclosure, the fastening nut is a hexagonal nut having six peripheral end faces.

According to an embodiment of the present disclosure, the rotation preventing piece is integrally formed with the carrier, protrudes from the carrier, and has a flat surface intended to abut against an outer peripheral end face of the fastening nut.

According to an embodiment of the disclosure, the drive axle hub assembly further comprises at least one bearing mounted between the planet wheel housing and the flange shaft body, wherein a side of one of the shafts abuts the fastening nut.

According to an embodiment of the disclosure, the at least one bearing includes a first tapered roller bearing and a second tapered roller bearing, an inner end face of one end of the planetary gear housing is provided with a shoulder ring protruding inwards along a circumferential direction thereof, so that a first tread and a second tread for mounting the first tapered roller bearing and the second tapered roller bearing are formed on two sides of the shoulder ring respectively, one side face of the first tapered roller bearing is abutted with the fastening nut, and one side face of the second tapered roller bearing is abutted with the flange shaft side wall.

According to one embodiment of the disclosure, a second shaft hole extending along the axial direction of the planet carrier is arranged in the middle of the planet carrier, and at least one part of the flange shaft main body is arranged in the second shaft hole and is matched with the planet carrier through a spline.

The drive axle wheel side assembly further comprises a connecting plate, one side, far away from the side wall of the flange shaft, of the planet carrier is provided with a mounting groove for mounting the connecting plate, and the flange shaft main body penetrating through the second shaft hole is fixed with the connecting plate through bolts.

The drive axle wheel limit subassembly of this disclosure is through setting up anti-rotation mechanism in the corresponding position department of fastening nut, can prevent that fastening nut from loosening and backing from the flange axle main part in the power transmission process of flange axle main part and planet wheel carrier to prevent that the bearing that sets up between planet wheel casing and flange axle main part from not loosening and backing, avoid this bearing to lead to abnormal wear because of working gap's increase, and then avoid the accident that the drive axle inefficacy even wheel hub deviate from and cause.

According to another aspect of the present disclosure there is provided a work machine comprising a drive axle rim assembly according to the above.

Drawings

The features and advantages of the present disclosure will be apparent from the detailed description provided below with reference to the accompanying drawings. It is to be understood that the following drawings are merely schematic and are not necessarily drawn to scale, and thus are not considered limiting of the present disclosure, wherein:

fig. 1 illustrates a perspective view of a transaxle rim assembly according to one exemplary embodiment of the present disclosure.

FIG. 2 illustrates an exploded view of the transaxle rim assembly shown in FIG. 1.

Fig. 3 shows a left side view of the transaxle rim assembly shown in fig. 1.

Fig. 4 shows a cross-sectional view of the transaxle rim assembly shown in fig. 3 along line A-A.

FIG. 5 illustrates a cross-sectional view of the transaxle rim assembly shown in FIG. 3, taken along line B-B.

Reference numerals illustrate:

1. a flange shaft; 11. a flange shaft body; 111. a second fixing hole; 12. a flange shaft side wall; 121. a first mounting hole; 122. a first profile; 2. a planetary gear set; 21. a planet wheel housing; 211. a shoulder ring; 212. a first tread; 213. a second tread; 214. a second mounting hole; 215. a second profile; 22. a planet carrier; 221. a first shaft hole; 222. a second shaft hole; 223. a mounting groove; 23. a planetary gear; 24. a sun gear; 25. a gear ring; 3. a fastening nut; 31. a plane; 4. an anti-rotation mechanism; 41. an anti-rotation sheet; 5. a bearing; 51. a first tapered roller bearing; 52. a second tapered roller bearing; 6. a connecting plate; 61. a first fixing hole; 7. and a seal.

Detailed Description

Embodiments of the present disclosure are described below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a more thorough understanding and enabling disclosure to those skilled in the art. However, it will be apparent to one skilled in the art that the present disclosure may be practiced without some of these specific details. Furthermore, it should be understood that the present disclosure is not limited to the particular embodiments described. Rather, it is contemplated that the present disclosure may be implemented with any combination of the features and elements described below, whether or not they relate to different embodiments. Thus, the following aspects, features, embodiments and advantages are merely illustrative and should not be considered elements or limitations of the claims except where explicitly set out in a claim.

Terms such as "first," "second," and the like are used hereinafter to describe elements of the present application, and are merely used for distinguishing between the elements and not for limiting the nature, order, or number of such elements. The terms "comprising" and "having" are intended to be inclusive and mean that there may be additional elements/components other than the listed elements/components. In the present disclosure, the directions "left" and "right" are defined with reference to the forward direction of the vehicle (herein, the construction machine) or the direction to which the vehicle head refers, specifically, the left-hand direction is "left" and the right-hand direction is "right" for an observer facing the forward direction of the vehicle.

Fig. 1-5 illustrate a transaxle rim assembly according to one embodiment of the present disclosure. In this figure, the wheel-side assembly is shown primarily on one side of the drive axle assembly (left side of the vehicle). The transaxle rim assembly according to this embodiment mainly includes a flange shaft 1 and a planetary gear set 2. The flange shaft 1 mainly includes a flange shaft body 11 and a flange shaft side wall 12 coaxially provided, and the flange shaft body 11 is formed by extending the center of the flange shaft side wall 12 toward one side (left side as shown in fig. 2) in the axial direction thereof. The planetary gear set 2 mainly includes a planetary gear housing 21 and a planetary gear carrier 22 provided in the planetary gear housing 21. The planetary gear housing 21 has a substantially circular truncated tubular structure, and as shown in fig. 1 and 2, the diameter of the left end of the planetary gear housing 21 is larger than that of the right end, and a plurality of second mounting holes 214 for mounting the hub are provided at equal intervals on the outer periphery of the left end of the planetary gear housing 21. At least a part of the flange shaft body 11 (left end portion as shown in fig. 2 and 4) is placed in the planetary gear housing 21 after passing through the right end of the planetary gear housing 21, and is fastened to the planetary gear housing 21 by the fastening nut 3 as a whole. The planetary carrier 22 is provided with an anti-rotation mechanism 4 near one side end face of the fastening nut 3. When the planetary carrier 22 is engaged with the flange shaft main body 11 for torque transmission, the rotation preventing mechanism 4 can be engaged with the fastening nut 3 to prevent the fastening nut 3 from being loosened by the rotation preventing mechanism 4, thereby preventing the transaxle rim assembly from being loosened from the hub during torque transmission.

According to an exemplary embodiment of the present disclosure, the flange shaft 1 is used to connect a final drive assembly of a work machine in order to receive rotational speed and torque transmitted by the final drive assembly. For this purpose, the flange shaft side wall 12 of the flange shaft 1 is provided at regular intervals with a plurality of first mounting holes 121 intended to be connected to a final drive assembly. The flange shaft body 11 of the flange shaft 1 is provided with external splines at its end remote from the flange shaft side wall 12 (left end in fig. 2). Correspondingly, at least a portion of the planet carrier 22 of the planetary gear set 2 facing the flange shaft side wall 12 (the right portion in fig. 2, which will be described in detail later) is provided with internal splines, so that the flange shaft body 11 and the planet carrier 22 can transmit rotational speed and torque from the final drive assembly through the splines.

In order to achieve a sealed connection of the flange shaft 1 and the planetary gear set 2, as shown in fig. 2 and 4, the periphery of the flange shaft side wall 12 is provided with a first profile 122 extending axially to the side of the planetary gear housing 21, and one end (right end in fig. 2) of the planetary gear housing 21, which is close to the flange shaft side wall 12, is provided with a second profile 215, which second profile 215 meets the first profile 122 in a concave-convex fit manner. In order to further enhance the sealing performance between the flange shaft 1 and the planetary gear set 2, a seal 7 is provided inside the junction of the first profile 122 and the second profile 215.

According to an exemplary embodiment of the present disclosure, as shown in fig. 2 and 4, the transaxle rim assembly further comprises at least one bearing 5, the bearing 5 being arranged between the planetary gear housing 21 and the flange shaft body 11 for supporting the planetary gear housing 21 on the flange shaft body 11 while also reducing friction between the planetary gear housing 21 and the flange shaft body 11. The side surface of at least one bearing 5 (right side surface of the bearing 5 on the right side as shown in fig. 4) abuts against the flange shaft side wall 12, and the side surface of at least one bearing 5 (left side surface of the bearing 5 on the left side as shown in fig. 4) abuts against the fastening nut 3. At least one bearing 5 arranged side by side is limited by the fastening nut 3, so that abnormal abrasion of the bearing 5 in the torque transmission process is prevented.

Specifically, as shown in fig. 2 to 5, the bearing 5 includes a first tapered roller bearing 51 and a second tapered roller bearing 52. For mounting the first tapered roller bearing 51 and the second tapered roller bearing 52, the inner end face of the one side end portion of the planetary gear housing 21 near the flange shaft side wall 12 is provided with a shoulder ring 211 protruding inward in the circumferential direction thereof. Preferably, the shoulder ring 211 is disposed in the middle of the inner end surface such that the left and right ends of the inner end surface form a first tread 212 for mounting the first tapered roller bearing 51 and a second tread 213 for mounting the second tapered roller bearing 52, respectively. The second tapered roller bearing 52 is mounted between the shoulder ring 211 and the flange shaft side wall 12, and one side surface (right side surface as viewed in fig. 4) of the second tapered roller bearing 52 abuts against the flange shaft side wall 12. The first tapered roller bearing 51 is mounted between the shoulder ring 211 and the fastening nut 3, and one side surface (left side surface as viewed in fig. 4) of the first tapered roller bearing 51 abuts against the fastening nut 3. Thereby, the relative positions of the first tapered roller bearing 51 and the second tapered roller bearing 52 between the flange shaft body 11 and the planetary gear housing 21, respectively, can be fixed simultaneously by the fastening nut 3, and the first tapered roller bearing 51 and the second tapered roller bearing 52 can ensure balance at the junction of the planetary gear housing 21 and the flange shaft body 11.

According to an exemplary embodiment of the present disclosure, as shown in fig. 2 to 5, the planetary gear set 2 may further include a sun gear 24, a plurality of planet gears 23, and an inner gear ring 25. The planet carrier 22 essentially comprises a first section (left part of the planet carrier 22 shown in fig. 4) for the drive connection between the sun gear 24, the plurality of planet gears 23 and the annulus gear 25. The first section of the carrier 22 is provided with a plurality of first shaft holes 221 for mounting a plurality of planetary gears 23 at equal intervals in the circumferential direction thereof, each first shaft hole 221 extending in the axial direction of the carrier 22. One end (left end shown in fig. 4) of the sun gear 24 is integrally formed with or fixed to the output shaft of the motor, and the other end (right end shown in fig. 4) of the sun gear 24 is inserted into the middle of the carrier 22 and is meshed with each of the planetary gears 23. An annular gear 25 is provided on the outer periphery of the first section of the carrier 22 and meshes with each of the planetary gears 23. In a more specific exemplary embodiment, the ring gear 25 may be fixedly connected with the planet wheel housing 21 by bolts.

According to a preferred embodiment of the present disclosure, with continued reference to fig. 2 to 5, the number of planetary gears 23 is four, and the rotation preventing mechanism 4 is disposed between adjacent two first shaft holes 221. In particular, the carrier 22 may further include a second section (right side portion of the carrier 22 shown in fig. 4 and 5) connected to the first section, the second section being provided at the middle thereof with a second shaft hole 222 extending in the axial direction thereof, the second shaft hole 222 being provided therein with an internal spline engaged with the external spline for engagement with the flange shaft body 11. The anti-rotation mechanism 4 comprises at least one anti-rotation tab 41. For example, one rotation preventing piece 41 may be provided between each pair of adjacent first shaft holes 221 of the carrier 22. Correspondingly, the outer circumference of the fastening nut 3 has at least one flat surface 31. For example, the fastening nut 3 may be a quadrangular nut, a hexagonal nut, an octagonal nut, etc., and thus may have four, six, or eight flat surfaces 31.

More preferably, the rotation preventing piece 41 is integrally formed with the carrier 22 and extends in the axial direction from a position on the second section of the carrier 22 corresponding to between the two first shaft holes 221 in a direction away from the first section. Advantageously, the side surface of the anti-rotation tab 41 facing the center of the planet wheel carrier 22 may be a flat surface so as to be able to closely fit the flat surface 31 of the outer end of the fastening nut 3.

In other specific embodiments, the number of anti-rotation tabs 41 and the type of fastening nuts 3 employed are related to the number of planet gears 23, and the number of planet gears 23 is related to the gear ratio of the planetary gear set 2. For example, when the number of the planetary gears 23 is five or six, if one rotation preventing piece 41 is provided between each two adjacent first shaft holes 221, five or six rotation preventing pieces 41 are provided in total. Correspondingly, the fastening nut 3 is a pentagonal nonstandard nut or a hexagonal nut, so that each anti-rotation piece 41 can correspond to one of the flat surfaces 31 of the outer end of the fastening nut 3. In addition, when the non-standard nut is used as the fastening nut 3, a third molding surface capable of preventing rotation may be formed on the outer peripheral surface of the fastening nut 3, for example, an irregular surface recessed toward the center of the fastening nut 3, and a fourth molding surface matching the third molding surface may be formed on the surface of the rotation preventing piece 41 on the side that is bonded to the fastening nut 3, whereby the rotation preventing may be performed by bonding the fourth molding surface and the third molding surface.

The disclosure also provides an engineering machine comprising the drive axle wheel side assembly. The construction machine may comprise a main speed reducer assembly, a first driving motor and a second driving motor, wherein an output shaft of the main speed reducer assembly is connected with the flange shaft 1, an output end of the first driving motor is connected with a sun gear 24 of the planetary gear set 2, and an output end of the second driving motor is connected with an inner gear ring 25 of the planetary gear set 2. During the transmission of torque and rotational speed, the anti-rotation mechanism 4 and the fastening nut 3 can cooperate with each other to prevent loosening or disengagement between the flange shaft 1 and the planetary gear housing 21 of the planetary gear set 2. Of course, the driving mode of the driving axle wheel side assembly includes, but is not limited to, the driving mode described above.

INDUSTRIAL APPLICABILITY

The drive axle wheel edge assembly is particularly suitable for engineering machinery, particularly loaders, excavators, bulldozers and the like, which need the wheel edge assembly to perform speed reduction and torque increase. However, it should be understood that a transaxle wheel side assembly according to the present disclosure may also be used with other vehicles or machines that are required to carry large loads and to slow down and increase torque.

Taking the embodiment shown in fig. 1 to 5 as an example, when assembling the transaxle rim assembly, first, the flange shaft main body 11 is passed through the second tapered roller bearing 52, so that the second tapered roller bearing 52 abuts against the flange shaft side wall 12. The sealing element 7 is sleeved in, so that half part of the sealing element 7 along the axial direction is clamped on the periphery of the flange shaft side wall 12 and corresponds to the first molded surface 122. The planetary gear housing 21 is fitted into the flange shaft main body 11, the second molded surface 215 of the outer periphery of the planetary gear housing 21 is engaged with the other half portion of the seal 7 in the axial direction thereof, one side surface of the shoulder ring 211 of the inner periphery of the planetary gear housing 21 is abutted with the second tapered roller bearing 52, and the outer periphery of the second tapered roller bearing 5 is abutted with the second tread 213. The first tapered roller bearing 51 is placed such that the first tapered roller bearing 51 abuts against the other side surface of the shoulder ring 211, and the outer peripheral surface of the first tapered roller bearing 51 abuts against the first tread 212. The fastening nut 3 is sleeved into the flange shaft main body 11, the fastening nut 3 is in threaded connection with the flange shaft main body 11, a certain pretightening force is applied after the fastening nut is screwed, and the working clearance of the first tapered roller bearing 51 and the second tapered roller bearing 52 is ensured.

After the flange shaft 1 and the planetary gear housing 21 are assembled as described above, the planetary carrier 22 and the planetary gear 23 are installed, which is a prior art, and a detailed description thereof is omitted. The assembled planet wheel carrier 22 and planet gears 23 are assembled with the assembled planet wheel housing 21 and flange shaft 1.

Specifically, the flange shaft body 11 is passed through the second shaft hole 222 of the side of the planetary carrier 22 where the rotation preventing piece 41 is provided, so that the rotation preventing piece 41 can be closely fitted to one flat surface 31 of the outer circumference of the fastening nut 3, and the portion of the flange shaft body 11 where the external spline is provided is inserted into the second shaft hole 222, so that the external spline is fitted with the internal spline of the second shaft hole 222. The connection plate 6 is then put in from the middle of the first section of the planetary carrier 22 so that the connection plate 6 can be placed in the mounting groove 223, and is screwed with the second fixing hole 111 on the flange shaft body 11 after passing through the first fixing hole 61 on the connection plate 6 by four bolts, thereby fixing the planetary carrier 22 with the flange shaft body 11.

In this way, when the planetary carrier 22 and the flange shaft main body 11 transmit power, the anti-rotation piece 41 and the fastening nut 3 always rotate synchronously with the planetary carrier 22 and the flange shaft main body 11, so that the fastening nut 3 is ensured not to loosen and retreat due to wheel side load, and the first tapered roller bearing 51 and the second tapered roller bearing 52 are prevented from abnormal abrasion due to the increase of working clearance, and accidents caused by failure of a drive axle or falling out of a hub are avoided.

In other embodiments, since the diameter of the connection plate 6 is larger than the gap between the two planetary gears 23, the connection plate 6 may be placed in the mounting groove 223 first, and then the assembly of the planetary gears 23 with the planetary carrier 22 is performed.

Finally, the ring gear 25 is again installed between the planetary gear housing 21 and the planetary gear carrier 22, and the sun gear 24 is inserted into the middle of the first section of the planetary gear carrier 22, so that the sun gear 24 meshes with the plurality of planetary gears 23.

Various modifications and alterations to the above disclosed embodiments may be made by those skilled in the art without departing from the scope or spirit of this disclosure. Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure. It is intended that the specification and examples disclosed herein be considered as exemplary only, with a true scope of the disclosure being indicated by the following claims and their equivalents.

Claims (10)

1. A transaxle wheel rim assembly, comprising:

a flange shaft (1), wherein the flange shaft (1) comprises a flange shaft main body (11) and a flange shaft side wall (12) which are coaxially arranged, and the flange shaft main body (11) extends to one side along the axial direction of the flange shaft side wall (12) from the center of the flange shaft side wall; and

the planetary gear set (2), planetary gear set (2) include with planet wheel casing (21) of flange axle lateral wall (12) joint and with planet wheel carrier (22) of flange axle main part (11) meshing, at least a portion of flange axle main part (11) pass planet wheel casing (21) and with planet wheel casing (21) fasten into a whole through fastening nut (3), the one side terminal surface that is close to fastening nut (3) of planet wheel carrier (22) is provided with anti-rotation mechanism (4), when planet wheel carrier (22) with flange axle main part (11) meshing, anti-rotation mechanism (4) with fastening nut (3) cooperate each other.

2. The transaxle rim assembly of claim 1, wherein the planetary gear set (2) further comprises a plurality of planetary gears (23), the planetary carrier (22) is provided with a plurality of first shaft holes (221) for mounting the plurality of planetary gears (23), respectively, and the anti-rotation mechanism (4) is provided between adjacent two first shaft holes (221).

3. The drive axle rim assembly according to claim 2, wherein the anti-rotation mechanism (4) comprises at least one anti-rotation piece (41) arranged between at least one pair of adjacent two first shaft holes (221), the periphery of the fastening nut (3) has at least one plane (31), and the anti-rotation piece (41) abuts against the plane (31).

4. A transaxle rim assembly according to claim 3, characterized in that the fastening nut (3) is a hexagonal nut having six peripheral end faces.

5. The drive axle rim assembly according to claim 4, characterized in that the anti-rotation tab (41) is formed integrally with the planetary carrier (22), protrudes from the planetary carrier (22), and has a flat surface intended to abut against the peripheral end face of the fastening nut (3).

6. Drive axle rim assembly according to any one of claims 1 to 5, characterized in that it further comprises at least one bearing (5) mounted between the planet wheel housing (21) and the flange shaft body (11), wherein a side of one of the bearings (5) abuts the fastening nut (3).

7. The transaxle rim assembly according to claim 6, wherein the at least one bearing (5) includes a first tapered roller bearing (51) and a second tapered roller bearing (52), an inner end surface of one end of the planetary gear housing (21) is provided with a shoulder ring (211) protruding inward in a circumferential direction thereof to form a first tread (212) and a second tread (213) for mounting the first tapered roller bearing (51) and the second tapered roller bearing (52) on both sides of the shoulder ring (211), respectively, one side surface of the first tapered roller bearing (51) being in abutment with the fastening nut (3), and one side surface of the second tapered roller bearing (52) being in abutment with the flange shaft side wall (12).

8. The transaxle rim assembly of any one of claims 1 to 5, wherein the planet carrier (22) is provided with a second axial bore (222) extending axially thereof, and at least a portion of the flange shaft body (11) is disposed within the second axial bore (222) and is spline-fitted with the planet carrier (22).

9. The drive axle rim assembly according to claim 8, further comprising a connection plate (6), wherein a side of the planet wheel carrier (22) remote from the flange shaft side wall (12) is provided with a mounting groove (223) for mounting the connection plate (6), and the flange shaft body (11) passing through the second shaft hole (222) is fastened with the connection plate (6) by means of a bolt.

10. A construction machine, characterized in that it comprises a drive axle rim assembly according to any one of claims 1 to 9.