Anti-abrasion structure for gearbox and gearbox

Abstract

The utility model relates to the technical field of gearboxes, in particular to an anti-abrasion structure for a gearbox and the gearbox. The anti-abrasion structure comprises a sun wheel shaft, a final transmission shaft and a rotating piece. The sun wheel shaft and the final transmission shaft are coaxially arranged, a set gap is formed in the axial direction, and the rotating piece is installed on the final transmission shaft; the rotating piece comprises a first circular ring and a second circular ring which can rotate relatively, the first circular ring is installed on the final transmission shaft, and the sun wheel shaft abuts against the second circular ring when axially moving. The utility model solves the problem that the final transmission shaft is abraded to damage the gear pair and influence the performance of the gearbox.

Description

Technical Field

[0001] The utility model relates to the technical field of gearboxes, in particular to an anti-wear structure for a gearbox and the gearbox. Background Art

[0002] CVT (Continuously Variable Transmission) technology is a continuously variable transmission technology that uses a transmission belt and master and driven wheels with variable working diameters to transmit power. It can achieve continuous change of transmission ratio, thereby obtaining the best match between the transmission system and engine operating conditions.

[0003] During the CVT durability test, it was found that there was wear problem on the end face of the final drive shaft of the transmission, which could easily cause material to peel off and enter the gear pair, easily damaging the gear pair and affecting the performance of the transmission. Utility Model Content

[0004] In view of the deficiencies in the prior art, the purpose of the embodiments of the utility model is to provide an anti-wear structure for a gearbox to solve the problem that the final drive shaft wears and then damages the gear pair, affecting the performance of the gearbox.

[0005] In order to achieve the above purpose, the embodiment of the utility model provides the following technical solutions:

[0006] An anti-wear structure for a gearbox comprises: a sun gear shaft, a final drive shaft and a rotating member; the sun gear shaft and the final drive shaft are coaxially arranged and have a set gap in the axial direction, and the rotating member is mounted on the final drive shaft; the rotating member comprises a first ring and a second ring that can rotate relatively, the first ring is mounted on the final drive shaft, and the sun gear shaft abuts against the second ring when axially moving.

[0007] Optionally, the rotating part is an angular contact bearing, the first ring is the outer ring of the bearing, the second ring is the inner ring of the bearing, the final drive shaft is provided with a bearing hole, the outer ring of the bearing is installed in the bearing hole of the final drive shaft, and the sun gear shaft abuts against the inner ring of the bearing when it moves axially.

[0008] Optionally, a boss is provided at the end of the sun gear shaft facing the final drive shaft, and the outer diameter of the boss is smaller than the inner diameter of the bearing outer ring.

[0009] Optionally, the rotating part is an angular contact bearing, the first ring is the inner ring of the bearing, the second ring is the outer ring of the bearing, the final drive shaft is provided with a bearing seat, the inner ring of the bearing is installed on the bearing seat of the final drive shaft, and the sun gear shaft abuts against the outer ring of the bearing when it moves axially.

[0010] Optionally, a blind hole is provided at the end of the sun gear shaft facing the final drive shaft, and the inner diameter of the blind hole is larger than the outer diameter of the inner ring of the bearing.

[0011] In another embodiment of the utility model, an anti-wear structure for a gearbox is provided, comprising: a sun gear shaft, a final drive shaft and a rotating member; the sun gear shaft and the final drive shaft are coaxially arranged and have a set gap in the axial direction, and the rotating member is installed on the sun gear shaft; the rotating member comprises a first ring and a second ring that can rotate relative to each other, the first ring is installed on the sun gear shaft, and the second ring abuts against the final drive shaft when the sun gear shaft moves axially.

[0012] Optionally, the rotating part is an angular contact bearing, the first ring is the outer ring of the bearing, the second ring is the inner ring of the bearing, the sun gear shaft is provided with a bearing hole, the outer ring of the bearing is installed in the bearing hole of the sun gear shaft, and the second ring abuts against the final drive shaft when the sun gear shaft moves axially.

[0013] Optionally, a boss is provided at the end of the final drive shaft facing the sun gear shaft, and the outer diameter of the boss is smaller than the inner diameter of the bearing outer ring.

[0014] Optionally, the rotating part is an angular contact bearing, the first ring is the inner ring of the bearing, the second ring is the outer ring of the bearing, the sun gear shaft is provided with a bearing seat, the inner ring of the bearing is installed on the bearing seat of the sun gear shaft, and the second ring abuts against the final drive shaft when the sun gear shaft moves axially; a blind hole is provided at the end of the final drive shaft facing the sun gear shaft, and the inner diameter of the blind hole is larger than the outer diameter of the inner ring of the bearing.

[0015] An embodiment of the utility model further provides a gearbox, comprising the anti-wear structure for the gearbox as described above.

[0016] One or more technical solutions provided in the embodiments of the present utility model have at least the following technical effects or advantages:

[0017] The utility model adds a rotating part at the end of the final drive shaft, wherein the first circular ring is installed on the final drive shaft, and the second circular ring and the first circular ring can rotate relatively. When the sun gear shaft moves toward the final drive shaft under pressure, the end of the sun gear shaft abuts against the second circular arc, and does not contact the end face of the final drive shaft, thereby effectively avoiding the occurrence of wear problems, preventing material peeling from damaging the gear pair and affecting the performance of the gearbox, and ensuring the stability of the performance of the whole machine. Moreover, the final drive shaft or the end face of the final drive shaft no longer needs to be heat treated, which also reduces the difficulty of processing parts.

[0018] Additional advantages of the present invention will be given in the following description, and some will become apparent from the following description or will be understood through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0020] Figure 1 It is a schematic diagram of the existing sun gear shaft and final drive shaft matching;

[0021] Figure 2 This is a schematic diagram of the rotating member provided in Embodiment 1 of the present utility model installed in the bearing hole;

[0022] Figure 3 This is a schematic diagram of the rotating member provided in Example 1 of the utility model installed on the bearing seat;

[0023] Figure 4 This is a schematic diagram of a rotating member provided in Embodiment 2 of the present utility model installed in a bearing hole;

[0024] Figure 5 This is a schematic diagram of a rotating member provided in Embodiment 2 of the present utility model installed on a bearing seat;

[0025] In the figure: 1, planetary gear; 2, sun gear shaft; 3, planet carrier; 4, final drive shaft; 5, rotating member; 51, first ring; 52, second ring;

[0026] In order to show the positions of various parts, the distances or sizes between them are exaggerated and the schematic diagram is for reference only. DETAILED DESCRIPTION

[0027] It should be noted that the following detailed descriptions are illustrative and are intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meanings as those commonly understood by those of ordinary skill in the art to which the present invention belongs. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0028] like Figure 1 As shown, the left core is the final drive sun gear shaft 2, on which the planetary gear 1 is arranged, and the right core is the final drive shaft 4, on which the planetary carrier 3 is arranged. Figure 1As shown, the gearbox and the final drive housing are isolated. The applicant found that a certain pressure is generated during the operation of the gearbox. Under the pressure, the sun gear shaft 2 moves toward the final drive shaft 4, causing the sun gear shaft 2 to contact the end face of the final drive shaft 4. When the vehicle speed is high, there will be a relatively large speed difference between the final drive sun gear speed and the planet carrier 3 (that is, there is a large speed difference between the sun gear shaft 2 and the final drive shaft 4). The joint between the two is prone to high temperature and thus wear, which is easy to cause material peeling and entering the gear pair, damaging the gear pair and affecting the performance of the gearbox. In order to ensure the stability of the overall performance, the utility model proposes an anti-wear structure for the gearbox.

[0029] Example 1

[0030] like Figure 2 , Figure 3 As shown, in one embodiment of the utility model, an anti-wear structure for a gearbox is proposed, comprising: a sun gear shaft 2, a final drive shaft 4 and a rotating member 5; the sun gear shaft 2 and the final drive shaft 4 are coaxially arranged, with the sun gear shaft 2 on the left and the final drive shaft 4 on the right, and a set gap between the two in the axial direction, that is, under normal working conditions, there is a certain gap between the right end of the sun gear shaft 2 and the left end of the final drive shaft 4, and the rotating member 5 is installed on the final drive shaft 4; wherein the rotating member 5 comprises a first circular ring 51 and a second circular ring 52 which can rotate relatively, the first circular ring 51 is installed on the final drive shaft 4, and the sun gear shaft 2 abuts against the second circular ring 52 when axially moving.

[0031] In this embodiment, a rotating member 5 is added to the end of the final drive shaft 4, wherein the first circular ring 51 is mounted on the final drive shaft 4, and the second circular ring 52 and the first circular ring 51 can rotate relative to each other. When the sun gear shaft 2 moves toward the final drive shaft 4 under pressure, the end of the sun gear shaft 2 abuts against the second circular arc, and does not contact the end face of the final drive shaft 4, effectively avoiding the occurrence of wear problems, preventing material peeling and damaging the gear pair and affecting the performance of the gearbox, and ensuring the stability of the performance of the whole machine. In addition, the end face of the sun gear shaft 2 or the final drive shaft 4 no longer needs to be heat treated, which also reduces the difficulty of processing parts.

[0032] Further, such as Figure 2As shown, the rotating member 5 is an angular contact bearing, the first circular ring 51 is the outer ring of the bearing, the second circular ring 52 is the inner ring of the bearing, the final drive shaft 4 is provided with a bearing hole, the outer ring of the bearing is installed in the bearing hole of the final drive shaft 4, the outer ring of the bearing and the bearing hole can be interference fit, and the sun gear shaft 2 abuts against the inner ring of the bearing when axially moving. The end of the sun gear shaft 2 facing the final drive shaft 4 is provided with a boss, and the outer diameter of the boss is smaller than the inner diameter of the outer ring of the bearing. By providing the boss, it is ensured that the sun gear shaft 2 and the final drive shaft 4 act on two circular rings respectively, which plays a role in preventing wear.

[0033] In this embodiment, a bearing hole is provided on the final drive shaft 4, and an angular contact ball bearing is added to the bearing hole. At the same time, a boss is provided on the end face of the sun gear shaft 2. After the two shafts are installed, the boss is matched with the inner ring of the angular contact bearing. By changing the surface-to-surface contact between two surfaces in relative motion to the rolling contact of the angular contact bearing, the wear problem is effectively avoided. At the same time, due to the change of the contact point, one of the end faces no longer needs to be heat treated, which also reduces the difficulty of processing the parts.

[0034] In another embodiment, Figure 3 As shown, the rotating member 5 is an angular contact bearing, the first circular ring 51 is the inner ring of the bearing, the second circular ring 52 is the outer ring of the bearing, the final drive shaft 4 is provided with a bearing seat, that is, a truncated cone protruding from the end face, the inner ring of the bearing is mounted on the bearing seat of the final drive shaft 4, and the sun gear shaft 2 abuts against the outer ring of the bearing when axially moving. Further, the end of the sun gear shaft 2 facing the final drive shaft 4 is provided with a blind hole, and the inner diameter of the blind hole is larger than the outer diameter of the inner ring of the bearing. By providing the blind hole, it is ensured that the sun gear shaft 2 and the final drive shaft 4 act on two circular rings respectively, which plays a role in preventing wear.

[0035] In this embodiment, a bearing seat is provided on the final drive shaft 4, and an angular contact ball bearing is sleeved on the bearing seat, and a blind hole is provided on the end face of the sun gear shaft 2, and the blind hole is matched with the outer ring of the angular contact bearing after the two shafts are installed. By changing the surface-to-surface contact between the two surfaces in relative motion to the rolling contact of the angular contact bearing, the wear problem is effectively avoided, and due to the change of the contact point, one of the end faces no longer needs to be heat treated, which also reduces the difficulty of processing the parts.

[0036] Example 2

[0037] The main difference between this embodiment and embodiment 1 is that the installation position of the rotating member 5 is different. Figure 4 , Figure 5As shown, this embodiment proposes an anti-wear structure for a gearbox, comprising: a sun gear shaft 2, a final drive shaft 4 and a rotating member 5; the sun gear shaft 2 and the final drive shaft 4 are coaxially arranged and have a set gap in the axial direction, and the rotating member 5 is installed on the sun gear shaft 2; the rotating member 5 includes a first ring 51 and a second ring 52 that can rotate relative to each other, the first ring 51 is installed on the sun gear shaft 2, and the sun gear shaft 2 drives the second ring 52 to abut against the final drive shaft 4 when it moves axially.

[0038] In this embodiment, a rotating member 5 is added to the end of the final drive shaft 4, wherein the first circular ring 51 is mounted on the final drive shaft 4, and the second circular ring 52 and the first circular ring 51 can rotate relative to each other. When the sun gear shaft 2 moves toward the final drive shaft 4 under pressure, the end of the sun gear shaft 2 abuts against the second circular arc, and does not contact the end face of the final drive shaft 4, effectively avoiding the occurrence of wear problems, preventing material peeling and damaging the gear pair and affecting the performance of the gearbox, and ensuring the stability of the performance of the whole machine. In addition, the end face of the sun gear shaft 2 or the final drive shaft 4 no longer needs to be heat treated, which also reduces the difficulty of processing parts.

[0039] Specifically, Figure 4 As shown, the rotating member 5 is an angular contact bearing, the first ring 51 is the outer ring of the bearing, the second ring 52 is the inner ring of the bearing, the sun gear shaft 2 is provided with a bearing hole, the outer ring of the bearing is installed in the bearing hole of the sun gear shaft 2, and when the sun gear shaft 2 moves axially, it drives the angular contact bearing to make the second ring 52 abut against the final drive shaft 4. Further, the end of the final drive shaft 4 facing the sun gear shaft 2 is provided with a boss, and the outer diameter of the boss is smaller than the inner diameter of the outer ring of the bearing. By providing the boss, it is ensured that the sun gear shaft 2 and the final drive shaft 4 act on the two rings respectively, which plays a role in preventing wear.

[0040] In this embodiment, a bearing hole is provided on the sun gear shaft 2, and an angular contact ball bearing is added to the bearing hole. At the same time, a boss is provided on the end face of the final drive shaft 4. After the two shafts are installed, the boss is matched with the inner ring of the angular contact bearing. By changing the surface-to-surface contact between two surfaces in relative motion to the rolling contact of the angular contact bearing, the wear problem is effectively avoided. At the same time, due to the change of the contact point, one of the end faces no longer needs to be heat treated, which also reduces the difficulty of processing the parts.

[0041] In another embodiment, Figure 5As shown, the rotating member 5 is an angular contact bearing, the first circular ring 51 is the inner ring of the bearing, the second circular ring 52 is the outer ring of the bearing, the sun gear shaft 2 is provided with a bearing seat, the inner ring of the bearing is installed on the bearing seat of the sun gear shaft 2, and the sun gear shaft 2 drives the angular contact bearing to move when axially moving, so that the second circular ring 52 abuts against the final drive shaft 4; further, the final drive shaft 4 is provided with a blind hole at the end facing the sun gear shaft 2, and the inner diameter of the blind hole is larger than the outer diameter of the inner ring of the bearing. By providing the blind hole, it is ensured that the sun gear shaft 2 and the final drive shaft 4 act on the two circular rings respectively, which plays a role in preventing wear.

[0042] In this embodiment, a bearing seat is provided on the sun gear shaft 2, and an angular contact ball bearing is sleeved on the bearing seat, and a blind hole is provided on the end face of the final drive shaft 4, and the blind hole is matched with the outer ring of the angular contact bearing after the two shafts are installed. By changing the surface-to-surface contact between the two surfaces in relative motion to the rolling contact of the angular contact bearing, the wear problem is effectively avoided, and due to the change of the contact point, one of the end faces no longer needs to be heat treated, which also reduces the difficulty of processing the parts.

[0043] Example 3

[0044] Based on the above-mentioned anti-wear structure, an embodiment of the utility model further provides a gearbox, in which the anti-wear structure described in the above-mentioned embodiment is arranged. Since the above-mentioned anti-wear structure has the above-mentioned technical effect, the technical effect of the gearbox adopting the anti-wear structure please refer to the above-mentioned embodiment.

[0045] Although the above describes the specific implementation methods of the utility model in combination with the accompanying drawings, it is not intended to limit the scope of protection of the utility model. Technical personnel in the relevant field should understand that on the basis of the technical solution of the utility model, various modifications or deformations that can be made by technical personnel in this field without creative work are still within the scope of protection of the utility model.

Claims

1. An anti-wear structure for a gearbox, It is characterized in that include: sun gear shaft, final drive shaft and rotating parts; The sun gear shaft and the final drive shaft are coaxially arranged and have a set gap in the axial direction, and the rotating member is installed on the final drive shaft; The rotating member includes a first ring and a second ring which are relatively rotatable, the first ring is mounted on the final drive shaft, and the sun gear shaft abuts against the second ring when axially moving.

2. The anti-wear structure for a gearbox according to claim 1, It is characterized in that The rotating part is an angular contact bearing, the first ring is the outer ring of the bearing, the second ring is the inner ring of the bearing, the final drive shaft is provided with a bearing hole, the outer ring of the bearing is installed in the bearing hole of the final drive shaft, and the sun gear shaft abuts against the inner ring of the bearing when it moves axially.

3. The anti-wear structure for a gearbox as claimed in claim 2, It is characterized in that A boss is arranged at the end of the sun gear shaft facing the final drive shaft, and the outer diameter of the boss is smaller than the inner diameter of the bearing outer ring.

4. The anti-wear structure for a gearbox according to claim 1, It is characterized in that The rotating part is an angular contact bearing, the first ring is the inner ring of the bearing, the second ring is the outer ring of the bearing, the final drive shaft is provided with a bearing seat, the inner ring of the bearing is installed on the bearing seat of the final drive shaft, and the sun gear shaft abuts against the outer ring of the bearing when it moves axially.

5. The anti-wear structure for a gearbox as claimed in claim 4, It is characterized in that A blind hole is arranged at the end of the sun gear shaft facing the final drive shaft, and the inner diameter of the blind hole is larger than the outer diameter of the inner ring of the bearing.

6. An anti-wear structure for a gearbox, It is characterized in that include: sun gear shaft, final drive shaft and rotating parts; The sun gear shaft and the final drive shaft are coaxially arranged and have a set gap in the axial direction, and the rotating member is installed on the sun gear shaft; The rotating member comprises a first ring and a second ring which are relatively rotatable, wherein the first ring is mounted on the sun gear shaft, and when the sun gear shaft moves axially, the second ring abuts against the final drive shaft.

7. The anti-wear structure for a gearbox according to claim 6, It is characterized in that The rotating part is an angular contact bearing, the first ring is the outer ring of the bearing, the second ring is the inner ring of the bearing, the sun gear shaft is provided with a bearing hole, the outer ring of the bearing is installed in the bearing hole of the sun gear shaft, and the second ring abuts against the final drive shaft when the sun gear shaft moves axially.

8. The anti-wear structure for a gearbox according to claim 7, It is characterized in that A boss is arranged at the end of the final drive shaft facing the sun gear shaft, and the outer diameter of the boss is smaller than the inner diameter of the outer ring of the bearing.

9. The anti-wear structure for a gearbox according to claim 6, It is characterized in that The rotating part is an angular contact bearing, the first ring is the inner ring of the bearing, the second ring is the outer ring of the bearing, the sun gear shaft is provided with a bearing seat, the inner ring of the bearing is installed on the bearing seat of the sun gear shaft, and the second ring abuts against the final drive shaft when the sun gear shaft moves axially; a blind hole is provided at the end of the final drive shaft facing the sun gear shaft, and the inner diameter of the blind hole is larger than the outer diameter of the inner ring of the bearing.

10. A gearbox, It is characterized in that It comprises an anti-wear structure for a gearbox as described in any one of claims 1 to 9.

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