Drive axle and wheel edge output mechanism thereof

Abstract

The utility model discloses a drive axle and a wheel edge output mechanism thereof. The drive axle comprises a brake shell, a piston assembly, a hub, an output shaft, a locking nut and an end cover. The piston assembly is assembled in an inner hole in the left end of the brake shell. The hub is assembled at the right end of the brake shell, a bearing I is installed between the opposite circumferential faces of the hub and the brake shell, and a sealing component is installed between the opposite axial faces of the hub and the brake shell. The output shaft is inserted into center holes of the brake shell and the hub, and a bearing II is mounted between the opposite circumferential surfaces of the output shaft and the brake shell; the locking nut is screwed in the threaded area of the end of the output shaft, and circumferential rotation of the locking nut is limited through the detachable first fastening assembly; the end cover is fixed to the right end face of the hub through a detachable second fastening assembly. The locking device is simple in structure, good in locking effect and not prone to loosening, for a large-tonnage wet bridge, the split type structure is convenient to disassemble and maintain, the labor intensity of workers is greatly reduced, the assembling time is shortened, and the assembling efficiency is improved.

Description

Technical Field

[0001] This utility model relates to a drive axle wheel-side output mechanism, belonging to the field of drive axle technology. Background Technology

[0002] In the construction machinery industry, the number of drive axles is constantly increasing, especially for large-tonnage drive axles which have a poor working environment. Oil leaks and loose nuts often occur at the wheel edges. Once disassembled, the threads on the output shaft are easily damaged, and replacing the output shaft is too costly. In order to reduce the labor intensity of workers and reduce repair costs, this utility model provides a new wheel edge output mechanism, which is split and easy to disassemble and repair. Summary of the Invention

[0003] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a simple and novel drive axle wheel-side output mechanism.

[0004] This utility model is achieved according to the following technical solution:

[0005] In a first aspect, this utility model provides a drive axle wheel-side output mechanism, comprising:

[0006] Brake housing;

[0007] The piston assembly is assembled in the inner hole at the left end of the brake housing along its axial direction;

[0008] A hub is assembled at the right end of the brake housing along its axial direction. A bearing I is installed between the circumferential surfaces of the hub and the brake housing, and a sealing component is installed between the axial surfaces of the hub and the brake housing.

[0009] An output shaft is inserted axially into the central hole of the brake housing and the hub, and a bearing II is installed between the output shaft and the opposing circumferential surfaces of the brake housing.

[0010] A lock nut is screwed onto the threaded area at the end of the output shaft located at the hub, and circumferential rotation of the lock nut is restricted by a removable first fastening assembly;

[0011] An end cap, secured to the hub on the right end face along its axial direction by a removable second fastening assembly, is used to cover the lock nut and output shaft.

[0012] In some embodiments, the locking nut has a plurality of axial through holes spaced apart along the entire circumference on the axial surface facing the hub, and the axial surface of the hub has a plurality of axial threaded holes corresponding one-to-one with the axial through holes; the first fastening assembly consists of a plurality of bolts I, which are inserted into the axial through holes and then tightened in the axial threaded holes.

[0013] In some embodiments, an annular groove I is provided between the circumferential surfaces of the hub and the output shaft facing each other at the end near the end cover. The locking nut is located in the annular groove I, and the outer diameter of the locking nut is smaller than the inner diameter of the annular groove I, so that an annular groove II is left between the locking nut and the circumferential surfaces of the hub facing each other. The end cover is provided with an axially extending annular flange, which is inserted into the annular groove II.

[0014] In some embodiments, at least one O-ring is provided between the annular flange and the circumferential surface facing the hub.

[0015] In some embodiments, the edge of the end cap is provided with a plurality of axial through holes spaced apart along the entire circumference, and the axial surface of the hub is provided with a plurality of axial threaded holes corresponding one-to-one with the axial through holes; the first fastening assembly is composed of a plurality of bolts II, which are inserted into the axial through holes and then tightened in the axial threaded holes.

[0016] In some embodiments, the edge of the end cap is provided with a plurality of axial set screw holes evenly spaced along the entire circumference, and the end cap is removed from the hub by continuously rotating the screws in the axial set screw holes and abutting against the hub.

[0017] In some embodiments, the center of the hub is provided as an outwardly protruding axial sleeve, which is inserted into the central hole of the brake housing; the inner ring of the bearing I is fitted onto the axial sleeve, and a spacer is fitted onto the axial sleeve on the inner side of the inner ring of the bearing I to limit the shaft end.

[0018] In some embodiments, the sealing component is a floating oil seal, which is enclosed in an annular groove formed by the brake housing and the wheel hub; wherein half of the floating oil seal is located in the brake housing and the other half is located in the wheel hub.

[0019] In some embodiments, a plurality of hub bolts are provided at the edge of the hub, spaced apart along the entire circumference, for fixing the hub to the axle housing of the drive axle.

[0020] Secondly, this utility model provides a drive axle equipped with the aforementioned drive axle wheel-side output mechanism.

[0021] The beneficial effects of this utility model are:

[0022] This utility model provides a drive axle wheel-side output mechanism with a simple structure, good locking effect, and is not easy to loosen. For large-tonnage wet axles, this split structure is easy to disassemble and maintain. During the assembly process, the operation is simple and easy, the assembly is convenient and labor-saving, greatly reducing the labor intensity of workers, shortening the assembly time, improving the assembly efficiency, and facilitating maintenance or replacement. Attached Figure Description

[0023] The accompanying drawings, as part of this utility model, are used to provide a further understanding of the present utility model. The illustrative embodiments and descriptions of the present utility model are used to explain the present utility model, but do not constitute an undue limitation of the present utility model. Obviously, the drawings described below are merely some embodiments; those skilled in the art can obtain other drawings based on these drawings without any creative effort.

[0024] In the attached diagram:

[0025] Figure 1 This is a cross-sectional view of a drive axle wheel-side output mechanism according to the present invention;

[0026] Figure 2 This is a schematic diagram of the output shaft of the present invention (a is a side view, b is a front view);

[0027] Figure 3 This is a schematic diagram of the wheel hub assembly of this utility model;

[0028] Figure 4 This is a schematic diagram of the brake housing assembly of this utility model;

[0029] Figure 5 This is a schematic diagram of the locking nut of this utility model (a is the front view, b is the top view).

[0030] Attached diagram labels: 1. Piston assembly; 2. Brake housing; 3. Floating oil seal; 4. Wheel hub; 5. Wheel hub bolt; 6. Bearing I; 7. Spacer; 8. Lock nut; 9. Bolt I; 10. End cap; 11. Output shaft; 12. O-ring; 13. Bolt II; 14. Bearing II.

[0031] It should be noted that these accompanying drawings and textual descriptions are not intended to limit the scope of the present invention in any way, but rather to illustrate the concept of the present invention to those skilled in the art by referring to specific embodiments. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate this utility model, but are not intended to limit the scope of this utility model.

[0033] In the description of this utility model, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0034] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0035] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 As shown, a drive axle wheel-side output mechanism includes a brake housing 2, a piston assembly 1, a wheel hub 4, an output shaft 11, a locking nut 8, and an end cap 10. The piston assembly 1 is mounted in the inner hole of the left end of the brake housing 2 along its axial direction. The wheel hub 4 is mounted at the right end of the brake housing 2 along its axial direction. A bearing I 6 is installed between the circumferential surfaces of the wheel hub 4 and the brake housing 2 facing each other, and a sealing component is installed between the axial surfaces of the wheel hub 4 and the brake housing 2 facing each other. The output shaft 11 is inserted into the center hole of the brake housing 2 and the wheel hub 4 along its axial direction, and a bearing II 14 is installed between the circumferential surfaces of the output shaft 11 and the brake housing 2 facing each other. The locking nut 8 is tightened at the threaded area at the end of the output shaft 11 located at the wheel hub 4, and the circumferential rotation of the locking nut 8 is restricted by a detachable first fastening component. The end cap 10 is fixed to the right end face of the wheel hub 4 along its axial direction by a detachable second fastening component, for covering the locking nut 8 and the output shaft 11.

[0036] The following provides a further explanation of the specific structure of the aforementioned locking nut.

[0037] like Figure 1 , Figure 5 As shown, the locking nut 8 has multiple axial through holes spaced apart along the entire circumference on the axial surface facing the hub 4, and the hub 4 has multiple axial threaded holes corresponding to the axial through holes; the first fastening assembly consists of multiple bolts I9, which are inserted into the axial through holes and then tightened in the axial threaded holes.

[0038] It should be noted that the locking nut 8 is made of 45 steel, heat-treated, with a hardness of 240-280HB. The axial through hole on the locking nut 8 can be a circular hole or an arc-shaped hole. This does not affect the function of the bolt I9, which, after passing through the axial through hole, is tightened into the axial threaded hole to prevent the locking nut 8 from rotating circumferentially.

[0039] Further options, such as Figure 1 As shown, an annular groove I is provided between the circumferential surfaces of the hub 4 and the output shaft 11 facing each other at the end near the end cover 10. The locking nut 8 is located in the annular groove I, and the outer diameter of the locking nut 8 is smaller than the inner diameter of the annular groove I, so that an annular groove II is left between the locking nut 8 and the circumferential surfaces of the hub 4 facing each other. The end cover 10 is provided with an axially extending annular flange, which is inserted into the annular groove II.

[0040] Further options, such as Figure 1 As shown, at least one O-ring 12 is provided between the annular flange and the circumferential surface of the hub 4 facing each other to prevent oil leakage from the wheel edge.

[0041] The following provides a further explanation of the specific structure of the end cap described above.

[0042] like Figure 1 As shown, the edge of the end cap 10 is provided with a plurality of axial through holes spaced apart along the entire circumference, and the axial surface of the hub 4 is provided with a plurality of axial threaded holes corresponding one-to-one with the axial through holes; the first fastening assembly is composed of a plurality of bolts II13, which are inserted into the axial through holes and then tightened in the axial threaded holes.

[0043] Further options, such as Figure 1 As shown, the edge of the end cover 10 is provided with a plurality of axial set screw holes evenly and alternately arranged along the entire circumference. The end cover 10 is removed from the hub 4 by continuously rotating the screws in the axial set screw holes and abutting against the hub 4.

[0044] It should be noted that the end cap is made of HT250 material and has 4×φ11 holes and 2×M10 threaded holes. The threaded holes are set screw holes, and the 4×φ11 holes are tightened onto the wheel hub with M10×35 bolts.

[0045] The following provides a further explanation of the specific structure of the aforementioned wheel hub.

[0046] like Figure 3 As shown, the center of the hub 4 is set as an outwardly protruding axial sleeve, which is inserted into the center hole of the brake housing 2; the inner ring of the bearing I6 is fitted on the axial sleeve, and a spacer 7 is fitted on the axial sleeve on the inner side of the inner ring of the bearing I6, which serves as a limit for the shaft end.

[0047] Further options, such as Figure 1As shown, the sealing component adopts a floating oil seal 3, which is installed in an annular groove formed by the brake housing 2 and the wheel hub 4; wherein, half of the floating oil seal 3 is located in the brake housing 2, and the other half of the floating oil seal 3 is located in the wheel hub 4.

[0048] Further options, such as Figure 1 As shown, multiple hub bolts 5 are installed at intervals along the entire circumference at the edge of the hub 4 to fix the hub 4 to the axle housing of the drive axle.

[0049] It should be noted that bearing I6 is a tapered roller bearing; a floating oil seal 3 is installed in the inner hole of the left end of the hub 4, which serves as a seal; the inner ring of the tapered roller bearing is installed on the output shaft 11; a spacer 7 is installed on the right side of the tapered roller bearing, which serves as a limit for the shaft end; the hub is a casting made of QT450-10 material.

[0050] like Figure 2 As shown, the output shaft is an integral forging made of 42CrMoH material. The left end is connected to the planetary gear carrier. The inner ring of bearing II is installed on the output shaft. The brake housing assembly (including brake housing and piston assembly) is installed on the output shaft, and then the hub assembly (including hub and spacer) is installed. A lock nut is installed at the threaded end of the output shaft. The lock nut has 6×φ19 holes for mounting bolt I, which achieves the effect of locking the wheel edge and making it less prone to loosening.

[0051] Continue to refer to Figure 1 As shown, in the actual assembly process, the piston assembly 1 is installed into the brake housing 2, the outer rings of the bearings at both ends are installed into the brake housing 2, the inner ring of the left bearing is installed on the left end of the output shaft 11, and the inner ring of the right bearing is installed on the wheel hub 4. Before assembling the inner rings of the bearings, the spacer 7 must be installed first. Half of the floating oil seal 3 is installed into the inner hole of the brake housing 2, and the other half is installed into the inner hole of the wheel hub 4. The floating oil seal 3 plays a sealing role. The locking nut 8 is installed at the end of the output shaft 11. The locking nut 8 is tightened by 6 bolts I9 to prevent the locking nut 8 from loosening. The end cover 10 is connected to the wheel hub 4 by M10×35 bolts. An O-ring 12 is installed at the connection position between the end cover 10 and the wheel hub 4 to prevent oil leakage from the wheel edge.

[0052] The wheel-side output mechanism provided by this utility model has a simple structure, good locking effect, and is not easy to loosen. For large-tonnage wet axles, this split structure is easy to disassemble and maintain. During the assembly process, it is simple and easy to operate, easy to assemble and saves labor, greatly reducing the labor intensity of workers, shortening the assembly time, improving the assembly efficiency, and facilitating maintenance or replacement.

[0053] The drive axle provided by this utility model is described below. The drive axle described below and the drive axle wheel-side output mechanism described above can be referred to in correspondence.

[0054] The present invention provides a drive axle that may include the drive axle wheel-side output mechanism as described in any of the above embodiments.

[0055] The beneficial effects achieved by the drive axle provided by this utility model are consistent with the beneficial effects achieved by the drive axle wheel-side output mechanism provided by this utility model, so they will not be repeated here.

[0056] Numerous specific details are set forth in the specification provided herein. However, it will be understood that embodiments of the present invention may be practiced without these specific details. In some instances, well-known methods, structures, and techniques have not been shown in detail so as not to obscure the understanding of this specification.

[0057] Furthermore, those skilled in the art will understand that although some embodiments described herein include certain features found in other embodiments but not others, combinations of features from different embodiments are also within the scope of protection of this invention and form different embodiments. For example, in the embodiments described above, those skilled in the art can use them in combination based on known technical solutions and the technical problems to be solved by this application.

[0058] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-described technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A drive axle wheel-side output mechanism, characterized in that, It comprises: a brake shell; a piston assembly assembled in the left end hole of the brake shell along its axial direction; a hub assembled at the right end of the brake shell along its axial direction, a bearing I is installed between the circumferential surface of the hub and the brake shell, a sealing component is installed between the axial surface of the hub and the brake shell; an output shaft inserted into the central hole of the brake shell and the hub along the axial direction, a bearing II is installed between the circumferential surface of the output shaft and the brake shell; a lock nut screwed at the threaded area of the end of the output shaft at the hub, and the lock nut is limited to rotate circumferentially by a detachable first fastening assembly; an end cover fixed on the right end surface of the hub along its axial direction by a detachable second fastening assembly, used to cover the lock nut and the output shaft.

2. The wheel-side output mechanism of the drive axle according to claim 1, wherein: a plurality of axial through holes are arranged on the lock nut at the part facing the axial surface of the hub, and a plurality of axial threaded holes corresponding to the axial through holes are arranged on the axial surface of the hub; the first fastening assembly is composed of a plurality of bolts I, which are screwed into the axial threaded holes after being inserted into the axial through holes.

3. The wheel-side output mechanism of the drive axle according to claim 1, wherein: an annular groove I is arranged between the circumferential surface of the hub and the output shaft at the end close to the end cover, the lock nut is located in the annular groove I, and the outer diameter of the lock nut is smaller than the inner diameter of the annular groove I, so that an annular groove II is left between the circumferential surface of the hub and the lock nut; an annular flange extending axially is arranged on the end cover, and the annular flange is inserted into the annular groove II.

4. The wheel-side output mechanism of the drive axle according to claim 3, wherein: at least one O-ring is arranged between the annular flange and the circumferential surface of the hub.

5. The wheel-side output mechanism of the drive axle according to claim 1, wherein: a plurality of axial through holes are arranged on the edge of the end cover, and a plurality of axial threaded holes corresponding to the axial through holes are arranged on the axial surface of the hub; the first fastening assembly is composed of a plurality of bolts II, which are screwed into the axial threaded holes after being inserted into the axial through holes.

6. The wheel-side output mechanism of the drive axle according to claim 5, wherein: a plurality of axial tumbler holes are arranged on the edge of the end cover, and the end cover is removed from the hub by continuously rotating the screw in the axial tumbler hole and abutting against the hub.

7. The wheel-side output mechanism of the drive axle according to claim 1, wherein: the center of the hub is an outwardly convex axial sleeve, which is inserted into the central hole of the brake shell; the inner ring of the bearing I is sleeved on the axial sleeve, and a spacer is sleeved on the inner side surface of the inner ring of the bearing I and the axial sleeve, which serves as an axial end position limiter.

8. The wheel-side output mechanism of the drive axle according to claim 1, wherein: The sealing component adopts a floating oil seal, which is arranged in an annular groove formed by the brake shell and the wheel hub; wherein one half of the floating oil seal is located in the brake shell, and the other half of the floating oil seal is located in the wheel hub.

9. The drive axle wheel end output mechanism of claim 1, wherein: A plurality of wheel hub bolts are arranged on the edge of the wheel hub and are spaced along the entire circumference, and are used to fix the wheel hub on the axle shell of the drive axle.

10. A drive axle, comprising: The drive axle wheel end output mechanism of any one of claims 1 to 9 is installed.

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