Drive axle wheel edge drive speed reducer assembly for engineering machinery

Abstract

The utility model relates to a drive axle hub drive reducer assembly for engineering machinery, which comprises a support shaft fixedly mounted on a frame and connected with an axle housing and a sun wheel shaft connected with the support shaft through a spline, the support shaft is independently connected with the axle housing through a bolt, the inner side of the support shaft is of a hollow structure, and a spline sleeve is arranged in the support shaft; one end of the sun wheel shaft is connected with the supporting shaft, the other end is provided with a sun wheel, and an output gear ring is arranged on the outer side of the supporting shaft and rotationally connected with the supporting shaft through a supporting bearing; the output gear ring and the sun gear are in transmission through the planet gear, the planet gear is arranged on the planet carrier, the supporting shaft and the axle housing are independently installed through bolts, it is ensured that the coaxiality between the supporting shaft and the axle housing of the wheel edge driving speed reducer is kept, the planet carrier is fixed to the supporting shaft through a cantilever structure, and it is ensured that the overall structure is light in weight; the supporting bearing is directly pressed by the locking nut, so that the bearing clearance is effectively ensured, and the reliability of the supporting bearing in the transmission period is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of engineering machinery, and in particular relates to a drive axle wheel-side drive reducer assembly for engineering machinery. Background Art

[0002] The statements herein merely provide background information related to the present disclosure and may not necessarily constitute prior art.

[0003] The drive axle wheel-side reducer structure commonly used in the engineering machinery industry usually takes the form of wheel-side drive, in which the support shaft and the bridge housing structure are closely connected and are often fixed by welding to ensure the integrity of the structure. The inventors found that through welding, the drive reducer support shaft and the bridge housing will produce welding deformation during the combination process, thereby affecting the stability of the entire structure; resulting in changes in the coaxiality between the drive axle structure and the bridge housing, and the transmission accuracy cannot be guaranteed. Utility Model Content

[0004] The purpose of the present disclosure is to provide a drive axle wheel-side drive reducer assembly for engineering machinery, which can solve at least one of the above-mentioned technical problems.

[0005] To achieve the above-mentioned objectives, one or more embodiments of the present disclosure provide a drive axle wheel-side drive reducer assembly for engineering machinery, including a support shaft fixedly mounted on a vehicle frame and connected to a bridge housing, and a sun gear shaft connected to the support shaft, wherein the support shaft is independently connected to the bridge housing by bolts, and the inner side of the support shaft is a hollow structure with a spline sleeve arranged inside; a spline is arranged at one end of the sun gear shaft and is connected to the support shaft via a spline sleeve, and a sun gear is arranged at the other end, wherein the sun gear and the sun gear shaft are an integrated structure.

[0006] Furthermore, the support shaft is a stepped shaft structure with a T-shaped cross section consisting of a long axis and a short axis, and the diameter of the long axis is smaller than the diameter of the short axis.

[0007] Furthermore, a planet carrier is provided at the end of the support shaft, and a planet gear is rotatably provided on the planet carrier.

[0008] Furthermore, an output gear ring is arranged on the outer side of the long axis of the support shaft, and the output gear ring is rotatably connected to the support shaft through a support bearing.

[0009] Furthermore, the support bearing is limited by a locking nut.

[0010] Furthermore, one end of the output gear ring contacts one end surface of the short shaft of the support shaft, and the other end is provided with an end cover, and a wear-resistant pin shaft for contacting and cooperating with the sun gear shaft is provided at the center position of the inner side of the end cover.

[0011] Furthermore, the end cover is connected to the output ring gear via screws.

[0012] Furthermore, a refueling port is provided on the end cover, and the sealing of the refueling port is achieved by adding and draining an oil plug.

[0013] Furthermore, a wire retaining ring is provided at the contact position between the support shaft and the planet carrier.

[0014] Furthermore, a wear-resistant washer is provided at the position where the sun gear contacts the support shaft.

[0015] The beneficial effects of one or more of the above technical solutions are:

[0016] The present invention discloses independently installing the wheel-side drive reducer support shaft and the bridge housing by means of bolts, thereby ensuring that the coaxiality between the wheel-side drive reducer support shaft and the bridge housing is maintained; the planetary carrier is fixed on the support shaft by means of a cantilever structure, thereby ensuring that the overall structure is lightweight; the support bearing is directly tightened by means of a locking nut, thereby effectively ensuring the bearing clearance and improving the reliability of the support bearing during transmission. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings in the specification, which constitute a part of the present application, are used to provide a further understanding of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute a limitation on the present application.

[0018] Figure 1 A schematic diagram of the structure of a drive axle wheel side drive reducer assembly in one or more embodiments of the present disclosure;

[0019] Figure 2 For Figure 1 Structural diagram of the middle section AA;

[0020] In the figure, 1. support shaft; 2. floating oil seal; 3. support bearing; 4. output gear ring; 5. locking nut; 6. screw; 7. end cover; 8. planetary gear; 9. planetary carrier; 10. wear-resistant pin shaft; 11. sun gear shaft; 12. wear-resistant gasket; 13. oil plug; 14. planetary gear bearing; 15. spline sleeve; 16. spline sleeve bearing; 17. retaining ring for hole; 18. wire retaining ring; 19. retaining ring for shaft. DETAILED DESCRIPTION

[0021] As described in the background technology, the existing wheel-side drive reducer support shaft is welded to the bridge housing. After being connected by welding, the reducer support shaft and the bridge housing are prone to welding deformation, resulting in poor coaxiality between the drive axle structure and the bridge housing.

[0022] In order to solve the above technical problems, the utility model proposes a drive axle wheel-side drive reducer assembly for engineering machinery, in which the wheel-side drive reducer support shaft and the bridge housing are independently installed by bolts, and the planetary carrier is fixed on the support shaft with a cantilever structure, and the support bearing is directly tightened with a locking nut, so that the output ring gear has high reliability and good stability.

[0023] See also Figure 1 and Figure 2 The present embodiment provides a drive axle wheel-side drive reducer assembly for engineering machinery, including a support shaft 1 fixedly mounted on a vehicle frame and connected to a bridge housing, and a sun gear shaft 11 connected to the support shaft 1, wherein the support shaft 1 is independently connected to the bridge housing by bolts, and the inner side of the support shaft 1 is a hollow structure, in which a spline sleeve 15 is arranged; an involute spline is arranged at one end of the sun gear shaft 11, which is connected to the support shaft 1 through the spline sleeve 15, and a sun gear is arranged at the other end, and the sun gear and the sun gear shaft 11 are an integrated structure; the spline sleeve 15 is rotatably connected to the inner side of the support shaft 1 through a spline sleeve bearing 16, and a hole retaining ring 17 is arranged at the end of the spline sleeve bearing 16 away from the sun gear to avoid axial displacement of the spline sleeve bearing 16 and to limit the position.

[0024] The support shaft 1 as a whole is a stepped shaft structure with a "T"-shaped cross-section composed of a long axis and a short axis, and the diameter of the long axis is smaller than the diameter of the short axis; a planet carrier 9 is provided at the end of the support shaft 1, and a wire retaining ring 18 is provided at the contact position between the support shaft 1 and the planet carrier 9; the wire retaining ring 18 is used to limit the axial movement of the planet carrier 9, and the planet carrier 9 adopts a cantilever structure to ensure the overall lightweight of the structure, and a planetary gear 8 is rotatably arranged on the planet carrier 9; the planetary gear 8 is installed on the planet carrier 9 through a planetary gear bearing 14, and the planetary gear bearing 14 is axially limited by a shaft retaining ring 19.

[0025] An output gear ring 4 is provided at the outer end of the long shaft section of the support shaft 1, and the output gear ring 4 is rotatably connected to the support shaft 1 through a support bearing 3; the support bearing 3 is directly tightened by a locking nut 5 to achieve limited pre-tightening.

[0026] One end of the output gear ring 4 contacts one end surface of the short shaft of the support shaft 1 , and the other end is provided with an end cover 7 . A wear-resistant pin shaft 10 is provided at the center position of the inner side of the end cover 7 and is used in contact with the sun gear shaft 11 .

[0027] The end cover 7 is connected to the output gear ring 4 by means of screws 6 . A refueling port is provided on the end cover 7 , and the sealing of the refueling port is achieved by means of an oil filling and draining plug 13 .

[0028] A wear-resistant washer 12 is provided at the position where the sun gear contacts the support shaft 1 to prevent rotational wear between the end faces of the support shaft 1 and the end faces of the sun gear; similarly, a floating oil seal 2 is provided at the position where the inner end face of the stub shaft of the support shaft 1 contacts the output gear ring 4 to prevent the lubricating oil on the support bearing 3 from leaking from the contact position between the inner end face of the stub shaft of the support shaft 1 and the output gear ring 4.

[0029] Working principle:

[0030] The support shaft 1 is connected to the bridge housing by bolts and fixed to the frame to ensure the coaxiality between the support shaft of the wheel-side drive reducer and the bridge housing. At the same time, the driving device can drive the spline sleeve 15 to rotate, thereby driving the spline to realize the transmission of the sun gear shaft 11; then the sun gear is used to drive the entire planetary gear system to reduce speed, and the output of the reduction action is performed through the output ring gear 4.

[0031] Although the above describes the specific implementation methods of the present disclosure in conjunction with the accompanying drawings, it is not intended to limit the scope of protection of the present disclosure. Technical personnel in the relevant field should understand that on the basis of the technical solution of the present disclosure, various modifications or variations that can be made by those skilled in the art without creative work are still within the scope of protection of the present disclosure.

Claims

1. A drive axle wheel side drive reducer assembly for engineering machinery, characterized in that: It includes a support shaft fixedly mounted on a vehicle frame and connected to a bridge housing, and a sun gear shaft connected to the support shaft. The support shaft is independently connected to the bridge housing by bolts. The inner side of the support shaft is a hollow structure with a spline sleeve arranged inside. A spline is arranged at one end of the sun gear shaft and connected to the support shaft via a spline sleeve. A sun gear is arranged at the other end. The sun gear and the sun gear shaft are an integrated structure.

2. The drive axle wheel side drive reducer assembly for engineering machinery according to claim 1, characterized in that: The support shaft is a stepped shaft structure with a "T"-shaped cross section consisting of a long axis and a short axis, and the diameter of the long axis is smaller than the diameter of the short axis.

3. The drive axle wheel side drive reducer assembly for engineering machinery according to claim 1, characterized in that: A planet carrier is arranged at the end of the support shaft, and a planet gear is rotatably arranged on the planet carrier.

4. The drive axle wheel side drive reducer assembly for engineering machinery according to claim 2, characterized in that: An output gear ring is arranged outside the long axis of the support shaft, and the output gear ring is rotatably connected to the support shaft through a support bearing.

5. The drive axle wheel side drive reducer assembly for engineering machinery according to claim 4, characterized in that: The support bearing is limited by a locking nut.

6. The drive axle wheel side drive reducer assembly for engineering machinery according to claim 4, characterized in that: One end of the output gear ring contacts one end surface of the short shaft of the support shaft, and the other end is provided with an end cover. The center position of the inner side of the end cover is provided with a wear-resistant pin shaft for contacting and cooperating with the sun gear shaft.

7. The drive axle wheel side drive reducer assembly for engineering machinery according to claim 6, characterized in that: The end cover is connected to the output gear ring through screws.

8. The drive axle wheel side drive reducer assembly for engineering machinery according to claim 6, characterized in that: The end cover is provided with a refueling port, and the sealing of the refueling port is achieved by adding and draining an oil plug.

9. The drive axle wheel side drive reducer assembly for engineering machinery according to claim 1, characterized in that: A wire retaining ring is arranged at the contact position between the support shaft and the planet carrier.

10. The drive axle wheel side drive reducer assembly for engineering machinery according to claim 1, characterized in that: A wear-resistant washer is arranged at the position where the sun gear contacts the support shaft.

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