Main reducer input end structure and drive axle

Abstract

The utility model discloses a main speed reducer input end structure and a drive axle. The main speed reducer input end structure comprises a planet carrier, a split type input flange assembly and at least one first connecting part. The split type input flange assembly comprises an input flange and a pressing plate, the input flange is arranged on the planet carrier in a sleeving mode, a spline structure is arranged between the opposite circumferential faces of the input flange and the planet carrier, and the input flange and the planet carrier are fixed together in the circumferential direction. A through hole is formed in the center area of the axial face of the input flange, the pressing plate is arranged in the through hole, and the outer contour of the pressing plate is matched with the shape of the through hole. The at least one first connecting part is used for fixing the pressing plate to the axial end face of the planet carrier. The utility model ingeniously solves the processing and assembling problems of the whole product, and effectively improves the production efficiency of the drive axle.

Description

Technical Field

[0001] The utility model relates to a main reducer input end structure of a drive axle, belonging to the technical field of drive axles. Background Art

[0002] As the terminal component of the entire transmission system, the drive axle is an important component of engineering machinery. The design and manufacturing level of the drive axle plays an important and decisive role in the advancement and reliability of engineering machinery.

[0003] The current structure of the main reducer input end of the drive axle is a blind-covered input flange assembly, consisting of an input flange, a planetary carrier, and connecting bolts. The input flange, serving as the power input end, primarily receives power from the upper end. The input flange includes internal splines, while the planetary carrier includes external splines. The input flange and the planetary carrier are connected via internal and external splines and fastened with bolts. Furthermore, the machining of the planetary carrier's external splines also requires manual scribing, marking, and drilling along the center line of the tooth thickness of the external splines. During assembly, while the input flange and the planetary carrier's internal and external splines are aligned, the four fixing bolt holes often misalign. This is because the two parts are machined separately, and the manually marked hole positioning accuracy is low, resulting in large errors. This results in a low drive axle survival rate, severely impacting production efficiency and preventing the use of drive axles for mass assembly production. Summary of the Invention

[0004] The utility model provides a main reducer input end structure to solve the above technical problems, avoid similar situations from occurring, and be in a more ideal working state, so as to improve the processing efficiency of the entire workshop and the assembly efficiency of the entire drive axle.

[0005] The utility model is implemented according to the following technical solutions:

[0006] In a first aspect, the present invention provides a final reducer input end structure, comprising:

[0007] planetary carrier;

[0008] A split input flange assembly includes an input flange and a pressure plate. The input flange is mounted on the planet carrier, and a spline structure is provided between the facing circumferential surfaces of the input flange and the planet carrier to fix the two together in the circumferential direction. A through hole is provided in the central area of ​​the axial surface of the input flange, and the pressure plate is arranged in the through hole, and the outer contour of the pressure plate is adapted to the shape of the through hole.

[0009] At least one first connecting component is used to fix the pressure plate on the axial end surface of the planet carrier.

[0010] In some embodiments, the radial outer circumferential surface of the planet carrier is provided with external splines arranged along its entire circumference, and the radial inner circumferential surface of the input flange is provided with internal splines arranged along its entire circumference. The input flange and the planet carrier are fixed together by the cooperation of the internal and external splines, so that the planet carrier can rotate with the input flange.

[0011] In some embodiments, the through hole provided on the input flange is a stepped circular hole, and the pressure plate is provided as an inverted convex structure; when the pressure plate is placed in the stepped circular hole, a circle of radial flange structure of the pressure plate is pressed on the step surface of the stepped circular hole, thereby axially limiting the pressure plate.

[0012] In some embodiments, a sealing component is provided between the pressure plate and the input flange to prevent oil leakage therebetween.

[0013] In some embodiments, the sealing component is an O-ring, and a circle of grooves facing the radial flange structure of the pressure plate is provided on the step surface of the stepped circular hole. The O-ring is placed in the groove, and the pressure plate is fastened by the first connecting component, and then the O-ring is pressed down to deform to achieve sealing.

[0014] In some embodiments, at least one threaded hole is provided on the axial end face of the planetary carrier, and a light hole is provided on the pressure plate coaxially arranged with the threaded hole; the first connecting component is a fastening bolt, which is passed through the light hole and tightened in the threaded hole to fasten the pressure plate to the input flange.

[0015] In some embodiments, the input flange is further connected to an external power component via a second connecting component.

[0016] In some embodiments, a radial flange structure is provided at the outer end of the radial outer circumferential surface of the input flange, and a plurality of light holes are evenly spaced along the entire circumference of the radial flange structure; the second connecting component is a connecting bolt, which is passed through the light hole and tightened into the threaded hole of the external power component to fix the input flange and the external power component together.

[0017] In a second aspect, the present invention provides a drive axle including the above-mentioned main reducer input end structure.

[0018] Beneficial effects of the utility model:

[0019] The existing blind-cover input flange is modified into a split-and-assembled type, which is used to transfer the bolt holes for assembling the fastening bolts to the pressure plate. This makes the input flange's installation through-hole drilling process independent of the internal spline process, and similarly, the planetary carrier's threaded hole processing process is independent of the external spline rolling process. An O-ring seal is added to prevent oil leakage from the input flange end. The improved structure greatly increases the production efficiency of parts and the assembly efficiency of the entire drive axle. Within the effective space, the input flange adopts a split-and-assembled structure that cleverly solves the entire product processing and assembly problems, effectively improving the production efficiency of the drive axle. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings are part of this utility model and are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. Obviously, the drawings described below are only some embodiments. For those of ordinary skill in the art, other drawings can be derived from these drawings without inventive effort.

[0021] In the attached figure:

[0022] Figure 1 This is a cross-sectional view of the input end structure of the final reducer of the drive axle in the prior art;

[0023] Figure identification: 1-input flange, 2-planet carrier, 3-fastening bolts, 4-connecting bolts.

[0024] Figure 2 This is a cross-sectional view of the input end structure of the final reducer of the drive axle of the present utility model;

[0025] Figure identification: 11-O-ring, 12-planet carrier, 13-pressure plate, 14-fastening bolt, 15-connecting bolt, 16-input flange.

[0026] It should be noted that these drawings and textual descriptions are not intended to limit the conceptual scope of the present invention in any way, but rather to illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention but are not used to limit the scope of the present invention.

[0028] In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0029] In the description of this utility model, it should be noted that, unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; and direct connections or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of these terms in this utility model based on the specific circumstances.

[0030] like Figure 1 As shown, the original integral input flange assembly consists of: input flange 1, planet carrier 2, fastening bolts 3, and connecting bolts 4. Input flange 1 serves as the power input, primarily receiving power from the upper end. Input flange 1 includes internal splines, while planet carrier 2 includes external splines. Input flange 1 and planet carrier 2 are connected via internal and external splines and secured with fastening bolts 3. The manufacturing process for input flange 1 follows the following steps: forging → rough turning → quenching and tempering → finish turning → internal spline insertion → face gear drawing → quenching. Before machining the four bolt holes in the input flange, manual marking, marking, and drilling are required, based on the center of the tooth groove after gear shaping. Conversely, the manufacturing process for the planet carrier external splines follows the following steps: forging → rough turning → quenching and tempering → finish turning → external spline rolling → drilling. During the drilling process for planet carrier 2, manual marking, marking, and drilling are also required, based on the centerline of the tooth thickness of the planet carrier external splines. However, during assembly, the alignment of the internal and external splines often results in the four bolt holes becoming misaligned. The reason is that the two parts are processed separately, and the manual marking hole positioning accuracy is low and the error is large, resulting in a low drive axle survival rate, which seriously affects production efficiency and prevents large-scale assembly production of drive axles. Therefore, the utility model provides a drive axle final reducer input end structure to solve the above technical problems, avoid similar situations, and improve the production efficiency of the entire workshop.

[0031] like Figure 2As shown, a final reducer input end structure includes a planetary carrier 12, a split input flange assembly and at least one first connecting component; the split input flange assembly includes an input flange 16 and a pressure plate 13, the input flange 16 is sleeved on the planetary carrier 12, and a spline structure is provided between the facing circumferential surfaces of the two to fix the two together in the circumferential direction; a through hole is provided in the central area of ​​the axial surface of the input flange 16, and the pressure plate 13 is arranged in the through hole, and the outer contour of the pressure plate 13 is adapted to the shape of the through hole; at least one first connecting component is used to fix the pressure plate 13 to the axial end face of the planetary carrier 12.

[0032] Continue to refer to Figure 2 As shown, the radial outer circumferential surface of the planet carrier 12 is provided with external splines arranged along its entire circumference, and the radial inner circumferential surface of the input flange 16 is provided with internal splines arranged along its entire circumference. The input flange 16 and the planet carrier 12 are fixed together by the cooperation of the internal and external splines, so that the planet carrier 12 can rotate together with the input flange 16.

[0033] Continue to refer to Figure 2 As shown, the through hole provided on the input flange 16 is a stepped circular hole, and the pressure plate 13 is set as an inverted convex structure; when the pressure plate 13 is placed in the stepped circular hole, a circle of radial flange structure of the pressure plate 13 is pressed on the step surface of the stepped circular hole, thereby axially limiting the pressure plate 13.

[0034] In a further solution, a sealing component is provided between the pressure plate 13 and the input flange 16 to prevent oil leakage therebetween.

[0035] The preferred solution is to continue to refer to Figure 2 As shown, the sealing component is an O-ring 11. A circle of grooves facing the radial flange structure of the pressure plate 13 is provided on the step surface of the stepped circular hole. The O-ring 11 is placed in the groove. The pressure plate 13 is fastened by the first connecting component, and then the O-ring 11 is pressed down to deform and achieve sealing.

[0036] Continue to refer to Figure 2 As shown, at least one threaded hole is provided on the axial end face of the planet carrier 12, and a light hole is provided on the pressure plate 13 which is coaxially arranged with the threaded hole; the first connecting component is a fastening bolt 14, which is passed through the light hole and tightened in the threaded hole to fasten the pressure plate 13 to the input flange 16.

[0037] Continue to refer to Figure 2 As shown, the input flange 16 is also connected to the external power component via a second connecting component. A radial flange structure is provided at the outer end of the radially outer circumference of the input flange 16. Multiple apertures are evenly spaced along the entire circumference of the radial flange structure. The second connecting component is a connecting bolt 15, which is inserted through the aperture and then tightened into a threaded hole in the external power component to secure the input flange 16 to the external power component.

[0038] In summary, the utility model transforms the existing original blind cover input flange into a split modular type, which is used to transfer the bolt holes for assembling the fastening bolts to the pressure plate, so that the input flange installation through-hole drilling process and the internal spline process are independently processed and unrelated, and the planetary carrier threaded hole processing process and the external spline rolling process are also unrelated; a new O-ring seal is added to prevent oil leakage at the input flange end; the improved structure greatly increases the production efficiency of parts and the assembly efficiency of the entire drive axle. Within the effective space, the input flange adopts a split modular structure to cleverly solve the entire product processing and assembly problems, effectively improving the production efficiency of the drive axle.

[0039] The drive axle provided by the present invention is described below. The drive axle described below and the input end structure of the main reducer described above can refer to each other.

[0040] The utility model provides a drive axle, which may include the main reducer input end structure as described in any one of the above embodiments.

[0041] The beneficial effects achieved by the drive axle provided by the present invention are consistent with the beneficial effects achieved by the input end structure of the final reducer provided by the present invention, and will not be described in detail here.

[0042] In the description provided herein, numerous specific details are described. However, it is understood that embodiments of the present invention may be practiced without these specific details. In some instances, well-known methods, structures, and techniques are not shown in detail so as not to obscure the understanding of this description.

[0043] Furthermore, those skilled in the art will appreciate that, although some embodiments described herein include certain features included in other embodiments but not other features, combinations of features from different embodiments are also intended to fall within the scope of protection of the present invention and form different embodiments. For example, in the above embodiments, those skilled in the art will be able to use them in combination based on the known technical solutions and the technical problems to be solved by this application.

[0044] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment, it is not intended to limit the present invention. Any technician familiar with this patent can make some changes or modifications to equivalent embodiments using the above-mentioned technical content without departing from the scope of the technical solution of the present invention. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the solution of the present invention.

Claims

1. A main reducer input end structure, characterized in that: include: planetary carrier; A split input flange assembly includes an input flange and a pressure plate. The input flange is mounted on the planet carrier, and a spline structure is provided between the facing circumferential surfaces of the input flange and the planet carrier to fix the two together in the circumferential direction. A through hole is provided in the central area of ​​the axial surface of the input flange, and the pressure plate is arranged in the through hole, and the outer contour of the pressure plate is adapted to the shape of the through hole. At least one first connecting component is used to fix the pressure plate on the axial end surface of the planet carrier.

2. The input end structure of a final reducer according to claim 1, characterized in that: The radial outer circumferential surface of the planet carrier is provided with external splines arranged along its entire circumference, and the radial inner circumferential surface of the input flange is provided with internal splines arranged along its entire circumference. The input flange and the planet carrier are fixed together by the cooperation of the internal and external splines, so that the planet carrier can rotate with the input flange.

3. The input end structure of a final reducer according to claim 1, characterized in that: The through hole provided on the input flange is a stepped circular hole, and the pressure plate is provided with an inverted convex structure; When the pressing plate is placed in the stepped circular hole, a circle of radial flange structure of the pressing plate is pressed on the step surface of the stepped circular hole, thereby limiting the axial position of the pressing plate.

4. The input end structure of a final reducer according to claim 3, characterized in that: A sealing component is provided between the pressure plate and the input flange to prevent oil leakage therebetween.

5. The input end structure of the final reducer according to claim 4, characterized in that: The sealing component is an O-ring, and a circle of grooves facing the radial flange structure of the pressure plate is provided on the step surface of the stepped circular hole. The O-ring is placed in the groove, and the pressure plate is fastened by the first connecting component, thereby pressing down the O-ring to deform and achieve sealing.

6. The input end structure of a final reducer according to claim 1, characterized in that: At least one threaded hole is provided on the axial end surface of the planet carrier, and a light hole is provided on the pressure plate coaxially arranged with the threaded hole; The first connecting component is a fastening bolt, which is passed through the light hole and then screwed into the threaded hole to fasten the pressure plate to the input flange.

7. The input end structure of a final reducer according to claim 1, characterized in that: The input flange is also connected to an external power component via a second connecting component.

8. The input end structure of the final reducer according to claim 7, characterized in that: A radial flange structure is provided at the outer end of the radial outer circumferential surface of the input flange, and a plurality of light holes are evenly spaced along the entire circumference of the radial flange structure; The second connecting component is a connecting bolt, which is passed through the light hole and then screwed into the threaded hole of the external power component to fix the input flange and the external power component together.

9. A drive axle, characterized in that: The invention comprises the main reducer input end structure according to any one of claims 1 to 8.

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