Wheel end structure of drive axle and drive axle
By setting the convex teeth on the outer edge of the gear rack of the drive axle to engage the inner teeth of the gear ring, and using the limiting parts and limiting end surfaces to cooperate, the problems of gear ring movement and wear are solved, and a more convenient disassembly and assembly process is achieved.
Patent Information
- Application Number
- CN202420645142.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-01
- Publication Date
- 2025-05-23
- Estimated Expiration
- 2034-04-01
AI Technical Summary
In the drive axles of existing commercial vehicles, the relative rotation between the ring gear and the bridge pipe is difficult to effectively limit, resulting in wear and inconvenient disassembly and assembly.
By providing a plurality of protruding teeth on the outer edge of the ring gear bracket, they are interlocked with the inner teeth of the ring gear, and cooperate with the limiting end surface on the ring gear, the relative position of the ring gear bracket and the ring gear ring is fixed, preventing movement and wear, and easy disassembly and assembly.
Effectively prevent ring gears from squirting, avoid wear of ring gear end surfaces, and simplify the disassembly and assembly process of the end structure of the drive axle wheel.
Smart Images
Figure CN222891845U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of vehicles, in particular to a wheel end structure of a drive axle and the drive axle. Background Art
[0002] The drive axle of some commercial vehicles usually has a planetary reduction mechanism installed at its wheel end to increase torque. The sun gear of the planetary reduction mechanism is connected to the half-shaft inserted in the bridge tube, and the ring gear is connected to the bridge tube. The planetary gear rotates between the ring gear and the sun gear to drive the planetary bracket to rotate, and then drives the wheel hub connected to the planetary bracket to rotate, transmitting power from the half-shaft to the wheel; in order to keep the ring gear and the bridge tube relatively fixed, it is usually necessary to connect the ring gear bracket between the ring gear and the bridge tube. The inner edge of the ring gear bracket is sleeved on the bridge tube and cooperates with the bridge tube through splines to prevent the ring gear bracket from rubbing against the bridge tube. The tube rotates relative to each other, and the outer edge of the ring gear bracket and the ring gear are also matched through splines. The relative movement of the ring gear bracket and the ring gear in the axial direction is limited by the stop pin on the planetary bracket. Since the stop pin rotates with the planetary bracket, when the distance between the stop pin and the ring gear is too small, it will produce greater friction with the end face of the ring gear, causing wear of the ring gear. When the distance between the stop pin and the ring gear is too large, it is difficult to limit the ring gear well. In order to avoid the stop pin from loosening, the stop pin needs to be fixed to the planetary bracket by an interference fit, which makes it very inconvenient to disassemble and replace it later. Utility Model Content
[0003] In view of the deficiencies in the prior art, the first object of the utility model is to propose a wheel end structure of a drive axle, which can better prevent the gear ring from moving, avoid wear on the end face of the gear ring, and facilitate disassembly and assembly of the wheel end structure.
[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:
[0005] The wheel end structure of the drive axle includes the axle tube, half shaft, planetary reducer, and ring gear bracket;
[0006] The half shaft is connected to the bridge tube, and the outer end of the half shaft passes through the outer end of the bridge tube;
[0007] The planetary reducer includes a sun gear connected to the outer end of the half shaft, a ring gear, a planetary gear located between the ring gear and the sun gear and meshing with the ring gear and the sun gear, and a planetary carrier mounted on the planetary gear;
[0008] The inner edge of the gear ring bracket is sleeved on the bridge tube and cooperates with the bridge tube through a spline. The outer edge of the gear ring bracket is provided with a plurality of convex teeth arranged along its circumference, and the plurality of convex teeth are engaged with the inner tooth surface of the gear ring. A limiting end face is provided on the gear ring, and a limiting member is fixed to the inner end face of the gear ring in a detachable manner. The outer edge of the gear ring bracket is clamped between the limiting end face and the limiting member so that the gear ring bracket and the gear ring remain relatively fixed in the axial direction.
[0009] The outer edge of the gear ring bracket is provided with a boss extending radially outward of the gear ring bracket, and a plurality of convex teeth are arranged on the boss; the inner edge surface of the inner teeth of the gear ring is provided with a stop groove which is recessed radially outward along the gear ring, the inner end of the stop groove extends to the inner end surface of the gear ring to form an opening, the limiting end surface is located at the outer end of the stop groove, the convex teeth are embedded in the tooth groove formed between two adjacent inner teeth of the gear ring, the outer side surface of the boss abuts against the limiting end surface, and the limiting member is pressed against the inner side surface of the convex teeth and / or the boss.
[0010] The limiting member is in the shape of a sheet, and the outer edge of the limiting member is flush with the outer peripheral surface of the gear ring or is located on the inner side of the outer peripheral surface of the gear ring.
[0011] The inner end surface of the gear ring is provided with a threaded hole extending along the axial direction of the gear ring, a fixing bolt is threaded in the threaded hole, and the limiting piece is clamped and fixed between the nut of the fixing bolt and the inner end surface of the gear ring.
[0012] The inner end surface of the gear ring is provided with a plurality of limit plates arranged along the circumference of the gear ring.
[0013] The bridge tube is provided with a fixing assembly for fixing the inner edge of the gear ring bracket on the bridge tube to prevent the gear ring bracket from axially moving relative to the bridge tube.
[0014] The outer end of the outer circumferential surface of the bridge tube is provided with an external thread and a limiting shoulder located on the inner side of the external thread; the inner edge of the gear ring bracket is provided with a limiting boss protruding radially inward, and the fixing component includes a locking nut, which is threaded on the external thread and presses the inner edge of the gear ring bracket inward so that the limiting boss presses against the limiting shoulder.
[0015] The fixing assembly also includes a limiting ring sleeved on the periphery of the locking nut, and a locking bolt for fixing the limiting ring on the gear ring bracket. The inner edge of the limiting ring is provided with a plurality of retaining grooves, and the corner portions of the periphery of the locking nut are retained in the retaining grooves to prevent the locking nut from rotating relative to the limiting ring.
[0016] The drive axle includes the wheel end structure of the drive axle. The beneficial effects of the utility model are:
[0017] In the utility model, the convex teeth on the outer edge of the gear ring bracket mesh with the inner teeth of the gear ring to limit the freedom of the gear ring to rotate relative to the gear ring bracket, and the limiting piece and the limiting end face on the gear ring cooperate to limit the freedom of the gear ring bracket to move axially relative to the gear ring, so that the gear ring and the gear ring bracket are fixedly connected together, which can prevent the gear ring from moving axially and avoid wear on the end face of the gear ring. During maintenance and overhaul, the gear ring and the gear ring bracket can be disassembled by only removing the limiting piece from the gear ring, thereby facilitating the disassembly and assembly of the drive axle wheel end structure. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1It is a schematic diagram of the structure of the utility model;
[0019] Figure 2 It is a cross-sectional view of the utility model;
[0020] Figure 3 for Figure 2 Magnified view at A in the middle;
[0021] Figure 4 for Figure 1 Schematic diagram of the structure of the middle gear ring;
[0022] Figure 5 for Figure 1 A schematic diagram of the structure of the middle gear ring bracket;
[0023] Figure 6 It is a structural schematic diagram of the fixing component of the utility model. DETAILED DESCRIPTION
[0024] Below, in conjunction with the accompanying drawings and specific implementation methods, the utility model is further described:
[0025] like Figure 1-6As shown, a wheel end structure of a drive axle of the utility model is shown, which includes a bridge tube 10, a half shaft 20, a planetary reducer 30, and a ring gear bracket 40. The half shaft 20 is connected to the bridge tube 10, the inner end of the half shaft 20 is connected to the main reducer in the middle of the drive axle, and the outer end is passed through the outer end of the bridge tube 10. The planetary reducer 30 includes a sun gear 31, a ring gear 32, a planetary gear 33 and a planetary bracket 34 connected to the outer end of the half shaft 20. The ring gear 32 is located at the periphery of the sun gear 31, and the planetary gear 33 is located between the sun gear 31 and the ring gear 32. The inner and outer sides thereof are respectively meshed with the sun gear 31 and the ring gear 32. The planetary bracket 34 is installed on the planetary gear 33. The rotation of the half shaft 20 drives the sun gear 31 to rotate, so that the planetary gear 33 rotates around the sun gear 31, and then drives the planetary bracket 34 to rotate, and finally drives the wheel hub connected to the planetary bracket 34 to rotate, so as to transmit the power output by the half shaft 20 to the wheel hub through the planetary reducer 30. The gear ring bracket 40 includes an outer edge 401 and an inner edge 402. The inner edge 402 of the gear ring bracket 40 is sleeved on the bridge tube 10. An inner spline is provided on the inner surface of the inner edge 402. An outer spline is provided on the outer surface of the bridge tube 10. The inner edge 402 of the gear ring bracket 40 is matched with the bridge tube 10 by using the inner spline and the outer spline. The outer edge 401 of the gear ring bracket 40 is provided with a plurality of convex teeth 43 arranged along the circumference thereof. The outer edge 401 of the gear ring bracket 40 is embedded into the gear ring 32 from the inner side end of the gear ring 32. The plurality of convex teeth 43 are provided. 43 and the inner teeth 321 on the ring gear 32 are engaged with each other so that the ring gear 32 and the ring gear bracket 40 cannot rotate relative to each other. A limiting end face 323 is provided on the ring gear 32, and a limiting plate 35 is fixed on the inner end face of the ring gear 32 in a detachable manner. After the outer edge 401 of the ring gear bracket 40 is embedded into the ring gear 32 from the inner side end of the ring gear 32, the inner edge 401 of the ring gear 32 is clamped between the limiting end face 323 and the limiting plate 35, so that the ring gear bracket 40 and the ring gear 32 remain relatively fixed along the axial direction.
[0026] During assembly, the outer edge 401 of the gear ring bracket 40 is embedded into the gear ring 32 from the inner side end of the gear ring 32, so that the protruding teeth 43 on the outer edge 401 are engaged with the inner teeth 321 of the gear ring 32, and then the limiting plate 35 is fixed to the inner end surface of the gear ring 32, and the outer edge 401 of the gear ring bracket 40 is clamped and fixed by the limiting plate 35 and the limiting end surface 323. The above-mentioned limiting plate 35 is not limited to a sheet structure, and it can also be some block structures or annular structures arranged around the gear ring 32. In short, as long as it is fixed to the inner end surface of the gear ring 32 in a detachable manner and pressed against the inner side of the outer edge 401, it can be used.
[0027] Compared with the prior art, in the utility model, the convex teeth on the outer edge of the ring gear bracket engage with the inner teeth of the ring gear to limit the freedom of the ring gear to rotate relative to the ring gear bracket, and the limiting piece and the limiting end face on the ring gear cooperate to limit the freedom of the ring gear bracket to move axially relative to the ring gear, so that the ring gear and the ring gear bracket are fixedly connected together, which can prevent the ring gear from moving axially and avoid wear on the end face of the ring gear. During maintenance and overhaul, it is only necessary to remove the limiting piece from the ring gear to disassemble the ring gear and the ring gear bracket, so as to facilitate the disassembly and assembly of the drive axle wheel end structure.
[0028] In a preferred embodiment, a boss 42 extending radially outward of the ring gear bracket 40 is provided on the outer edge 401 of the ring gear bracket 40, and a plurality of convex teeth 43 are provided on the boss 42. A stop groove 322 is provided on the inner edge surface of the inner teeth 321 of the ring gear 32, which is recessed radially outward along the ring gear 32. The inner end of the stop groove 322 extends to the inner end surface of the ring gear 32 to form an opening, and the step surface formed by the outer end of the stop groove 322 forms a limiting end surface 323. The convex tooth 43 is embedded in the tooth groove between two adjacent inner teeth 321 of the ring gear 32, and the outer side surface of the boss 42 abuts against the limiting end surface 323. The limiting plate 35 is pressed against the inner side surface of the convex tooth 43. In this way, the outer edge 401 of the ring gear bracket 40 is fixed to the ring gear 32. In other embodiments, the limiting piece 35 may be pressed against the inner side of the boss 42, or the limiting piece 35 may be pressed against the inner side of the boss 43 and the inner side of the protruding tooth 42 at the same time. The outer edge of the limiting piece 35 is flush with the outer peripheral surface of the ring gear 32 to prevent the limiting piece 35 from protruding from the outer peripheral surface of the ring gear 32 and to avoid interference between the limiting piece 35 and the planetary bracket 34. Of course, the outer edge of the limiting piece 35 may also be set inside the outer peripheral surface of the ring gear 32. The inner end surface of the gear ring 32 is provided with a threaded hole extending along the axial direction of the gear ring 32, and a fixing bolt 36 is screwed into the threaded hole. The limiting plate 35 is clamped and fixed between the nut of the fixing bolt 36 and the inner end surface of the gear ring 32. During assembly, the outer edge 401 of the gear ring bracket 40 is embedded into the gear ring 32 from the inner side end of the gear ring 32, and the fixing bolt 35 passes through the limiting plate 35 and is screwed into the threaded hole. The fixing bolt 35 is tightened to clamp the limiting plate 35, so that the limiting plate 35 presses the outer edge 401 of the gear ring bracket 40 outward. In order to better fix the outer edge 401 of the gear ring bracket 40 to the gear ring 32, a plurality of limiting plates 35 arranged along the circumference of the gear ring 32 are provided on the inner end surface of the gear ring 32.
[0029] In another preferred embodiment, a fixing assembly is disposed on the bridge tube 10 , and the fixing assembly is used to fix the inner edge 402 of the ring gear bracket 40 on the bridge tube 10 to prevent the ring gear bracket 40 from axially moving relative to the bridge tube 10 . Specifically, an outer thread and a limiting shoulder 11 located inside the outer thread are provided at the outer end of the outer circumference of the bridge tube 10, and a limiting boss 41 protruding radially inward is provided at the inner edge 402 of the ring gear bracket 40. The inner edge 402 of the ring gear bracket 40 is sleeved on the bridge tube 10 from the outer end of the bridge tube 10, so that the limiting boss 41 abuts against the limiting shoulder 11. The fixing assembly includes a locking nut 50, which is threaded on the outer thread. The locking nut 50 is tightened, and the inner edge 402 of the ring gear bracket 40 is pressed inward by the locking nut 50, so that the limiting boss 41 presses the limiting shoulder 11. In this way, the inner edge of the ring gear bracket 40 can be clamped and fixed by the locking nut 50 in cooperation with the limiting shoulder 11. The limiting boss 41 can be formed by an annular washer installed on the inner surface of the inner edge 402 of the ring gear bracket 40 in an interference fit manner. The fixing assembly also includes a limiting ring 51 which is sleeved on the periphery of the locking nut 50, and a locking bolt 52. The locking bolt 52 passes through the limiting ring 51 and is screwed onto the ring gear bracket 40 to fix the limiting ring 51 and the ring gear bracket 40 together. The inner edge of the limiting ring 51 is provided with a plurality of locking grooves 511. The corner portions 501 on the periphery of the locking nut 50 are clamped in the locking grooves 511 to prevent the locking nut 50 from rotating relative to the limiting ring 51, and then prevent the locking nut 50 from rotating relative to the ring gear bracket 40. During assembly, the locking nut 50 is tightened, and then the limiting ring 51 is sleeved on the locking nut 50 so that the corner portions 501 of the locking nut 50 are clamped into the locking grooves 511 of the limiting ring 51. Finally, the locking bolt 52 is passed through the limiting ring 51 and is screwed onto the ring gear bracket 40 so that the limiting ring 51 and the ring gear bracket 40 remain relatively fixed. The locking nut 50 is limited by the limiting ring 51 to prevent the locking nut 50 from rotating relative to the ring gear bracket 40. The vibration during the driving of the vehicle will not cause the locking nut 50 to loosen, thereby making the ring gear bracket 40 and the bridge tube 10 better fixed together.
[0030] The drive axle of the utility model includes the wheel end structure of the drive axle mentioned above, and other structures of the drive axle are the same as those in the prior art, which will not be described in detail here.
[0031] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein, and these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.
Claims
1. The wheel end structure of the drive axle is characterized by: Including bridge pipe, half shaft, planetary reducer, ring gear bracket; The half shaft is connected to the bridge tube, and the outer end of the half shaft passes through the outer end of the bridge tube; The planetary reducer includes a sun gear connected to the outer end of the half shaft, a ring gear, a planetary gear located between the ring gear and the sun gear and meshing with the ring gear and the sun gear, and a planetary carrier mounted on the planetary gear; The inner edge of the gear ring bracket is sleeved on the bridge tube and cooperates with the bridge tube through a spline. The outer edge of the gear ring bracket is provided with a plurality of convex teeth arranged along its circumference, and the plurality of convex teeth are engaged with the inner tooth surface of the gear ring. A limiting end face is provided on the gear ring, and a limiting member is fixed to the inner end face of the gear ring in a detachable manner. The outer edge of the gear ring bracket is clamped between the limiting end face and the limiting member so that the gear ring bracket and the gear ring remain relatively fixed in the axial direction.
2. The wheel end structure of the drive axle according to claim 1, characterized in that: The outer edge of the gear ring bracket is provided with a boss extending radially outward of the gear ring bracket, and a plurality of convex teeth are arranged on the boss; the inner edge surface of the inner teeth of the gear ring is provided with a stop groove which is recessed radially outward along the gear ring, the inner end of the stop groove extends to the inner end surface of the gear ring to form an opening, the limiting end surface is located at the outer end of the stop groove, the convex teeth are embedded in the tooth groove formed between two adjacent inner teeth of the gear ring, the outer side surface of the boss abuts against the limiting end surface, and the limiting member is pressed against the inner side surface of the convex teeth and / or the boss.
3. The wheel end structure of the drive axle according to claim 1, characterized in that: The limiting member is in the shape of a sheet, and the outer edge of the limiting member is flush with the outer peripheral surface of the gear ring or is located on the inner side of the outer peripheral surface of the gear ring.
4. The wheel end structure of the drive axle according to claim 3, characterized in that: The inner end surface of the gear ring is provided with a threaded hole extending along the axial direction of the gear ring, a fixing bolt is threaded in the threaded hole, and the limiting piece is clamped and fixed between the nut of the fixing bolt and the inner end surface of the gear ring.
5. The wheel end structure of the drive axle according to claim 4, characterized in that: The inner end surface of the gear ring is provided with a plurality of limit plates arranged along the circumference of the gear ring.
6. The wheel end structure of the drive axle according to claim 1, characterized in that: The bridge tube is provided with a fixing assembly for fixing the inner edge of the gear ring bracket on the bridge tube to prevent the gear ring bracket from axially moving relative to the bridge tube.
7. The wheel end structure of the drive axle according to claim 6, characterized in that: The outer end of the outer circumferential surface of the bridge tube is provided with an external thread and a limiting shoulder located on the inner side of the external thread; the inner edge of the gear ring bracket is provided with a limiting boss protruding radially inward, and the fixing component includes a locking nut, which is threaded on the external thread and presses the inner edge of the gear ring bracket inward so that the limiting boss presses against the limiting shoulder.
8. The wheel end structure of the drive axle according to claim 7, characterized in that: The fixing assembly also includes a limiting ring sleeved on the periphery of the locking nut, and a locking bolt for fixing the limiting ring on the gear ring bracket. The inner edge of the limiting ring is provided with a plurality of retaining grooves, and the corner portions of the periphery of the locking nut are retained in the retaining grooves to prevent the locking nut from rotating relative to the limiting ring.
9. Drive axle, characterized in that: A wheel end structure of a drive axle comprising any one of claims 1-8.