Bevel gear structure

Abstract

This utility model discloses a bevel gear structure, relating to the field of gear technology. The key technical points are: it includes a hub, which comprises a hub body and a gear ring segment. The gear ring segment has a protruding strip, the hub body has a limiting groove, the protruding strip has a flow groove, the hub body has an annular groove, and the hub body has a through hole. The gear ring segment has a threaded hole. The protruding strip embedded in the limiting groove can transmit torque from the hub body to the gear ring segment, ensuring the synchronous rotation of the hub body and the gear ring segment. It can also synchronously align the through hole and the threaded hole, facilitating the insertion of the fixing screw. The cooling oil in the flow groove and the annular groove can absorb the heat generated by the friction of the gear teeth in a timely manner, reducing the possibility of localized overheating on the gear ring segment leading to grease failure, thereby reducing the possibility of increased wear on the gear teeth due to grease failure.

Description

Technical Field

[0001] This utility model relates to the field of gear technology, and more specifically, to bevel gear structures. Background Technology

[0002] A bevel gear is a type of gear with a beveled structure. It is mainly used for power transmission between intersecting shafts and is commonly found in industrial and automotive applications. A bevel gear typically consists of a hub and gear teeth fixed to the outer circumferential wall of the hub. The hub has a circular hole for the shaft to pass through, and the circumferential wall of the circular hole is interference-fitted with the shaft.

[0003] In some high-speed, light-load working environments, such as automotive steering systems, bevel gears are coated with grease to reduce relative friction during operation. However, because high-speed rotating bevel gears are prone to generating high temperatures, the grease may oxidize due to high temperatures, leading to grease failure and severe wear on the gear teeth.

[0004] Therefore, a new solution is needed to address this problem. Utility Model Content

[0005] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a bevel gear structure.

[0006] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a bevel gear structure, including a hub, the hub including a hub body and a gear ring segment sleeved on the hub body, the hub body having a circular hole, the outer peripheral wall of the gear ring segment having fixed gear teeth, the inner peripheral wall of the gear ring segment having a protruding strip, the outer peripheral wall of the hub body having a limiting groove for embedding the protruding strip, the protruding strip having a flow groove, the outer peripheral wall of the hub body having an annular groove, the flow groove and the annular groove together containing cooling oil, the bottom surface of the hub body having a through hole, the bottom surface of the gear ring segment having a threaded hole coaxially arranged with the through hole, and the same fixing screw passing through the through hole and the threaded hole.

[0007] The present invention is further configured such that: the hub body includes a frustum portion and a disc portion fixed to one side of the frustum portion; a rubber ring is fixed to the top surface of both the frustum portion and the top surface of the disc portion; and a first anti-overflow groove and a second anti-overflow groove are respectively provided on the gear ring segment for embedding the two rubber rings.

[0008] The present invention is further configured such that: the first anti-overflow groove is formed on the bottom surface of the gear ring segment, the diameter of the first anti-overflow groove is larger than the diameter of the second anti-overflow groove, and the distance from the threaded hole to the center of the bottom surface of the gear ring segment is larger than the radius of the first anti-overflow groove.

[0009] The present invention is further configured such that the diameter of the disc portion is smaller than the root circle diameter of the gear teeth.

[0010] The present invention is further configured such that an oil inlet with a communicating annular groove is provided on the peripheral wall of the circular hole.

[0011] The present invention is further configured such that the surface of the gear teeth is subjected to nitrocarbon co-diffusion treatment.

[0012] In summary, this utility model has the following beneficial effects:

[0013] When assembling the hub and gear ring segment, align the protruding strip with the limiting groove and insert it. This design prevents the hub and gear ring segment from rotating relative to each other. When the hub rotates synchronously with the shaft, the protruding strip can effectively transfer torque to the gear ring segment, ensuring the synchronization of the hub and gear ring segment's rotation. At the same time, it can also align the through hole with the threaded hole, facilitating the subsequent passage of the fixing screw. Fill the flow groove and annular groove with cooling oil, and then use the fixing screw to complete the fixing of the hub and gear ring segment. Before using the bevel gear, grease needs to be applied to the teeth of the bevel gear. During the high-speed rotation of the bevel gear, the contact points of the bevel gear will generate heat due to friction. The cooling oil in the flow groove and annular groove can absorb this heat, reducing the possibility of local heat accumulation at the teeth causing grease failure, thereby reducing the possibility of increased wear on the teeth due to grease failure. Attached Figure Description

[0014] Figure 1 This is an exploded view of the present invention;

[0015] Figure 2 This is a schematic diagram of the hub body in this utility model.

[0016] In the diagram: 1. Hub; 101. Frustum section; 102. Disc section; 2. Gear ring section; 3. Circular hole; 4. Gear tooth; 5. Protruding strip; 6. Limiting groove; 7. Flow groove; 8. Annular groove; 9. Through hole; 10. Threaded hole; 11. Fixing screw; 12. Rubber ring; 13. First anti-overflow groove; 14. Second anti-overflow groove; 15. Oil inlet. Detailed Implementation

[0017] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0018] Bevel gear structure, such as Figure 1 and Figure 2As shown, the wheel includes a hub, which comprises a hub body 1 and a gear ring segment 2 fitted onto the hub body 1. A circular hole 3 is provided on the hub body 1, and a shaft is installed in the circular hole 3 with an interference fit. Gear teeth 4 are fixed on the outer peripheral wall of the gear ring segment 2. Three protruding strips 5 are provided on the inner peripheral wall of the gear ring segment 2, arranged in a circular array around the center of the gear ring segment 2. A limiting groove 6 for embedding the protruding strips 5 is provided on the outer peripheral wall of the hub body 1, and a flow groove 7 is provided on the protruding strips 5 to allow the protruding strips to pass through. A transverse through-gear 5 is provided. An annular groove 8 is formed on the outer peripheral wall of the hub 1. Cooling oil is contained in both the flow groove 7 and the annular groove 8. During the operation of the bevel gear, the cooling oil can flow along the flow groove 7 and the annular groove 8, allowing the cooling oil to fully contact the gear ring segment 2. A through hole 9 is formed on the bottom surface of the hub 1, and a threaded hole 10 is formed on the bottom surface of the gear ring segment 2, which is coaxial with the through hole 9. The same fixing screw 11 passes through the through hole 9 and the threaded hole 10. The hub 1 and the gear ring segment 2 are fixed together. The screws 11 are detachably connected. When the hub 1 and the gear ring segment 2 are assembled, the protruding strip 5 is aligned with the limiting groove 6 and inserted. This setting makes it difficult for the hub 1 and the gear ring segment 2 to rotate relative to each other. When the hub 1 rotates synchronously with the shaft, the protruding strip 5 can better transmit the torque to the gear ring segment 2, ensuring the synchronicity of the rotation of the hub 1 and the gear ring segment 2. At the same time, it can also align the through hole 9 with the threaded hole 10, which is convenient for the subsequent passing of the fixing screw 11. Cooling oil is filled into the flow groove 7 and the annular groove 8. Then, the fixing screw 11 is used to complete the fixing of the hub 1 and the gear ring segment 2. Before using the bevel gear, grease needs to be applied to the gear teeth 4 on the bevel gear. During the high-speed rotation of the bevel gear, the contact point of the bevel gear will generate heat due to friction. The cooling oil in the flow groove 7 and the annular groove 8 can absorb this heat, reducing the possibility of local heat accumulation at the gear teeth 4 causing grease failure, thereby reducing the possibility of increased wear on the gear teeth 4 due to grease failure.

[0019] like Figure 1 and Figure 2As shown, the hub 1 includes a frustum portion 101 and a disc portion 102 fixed to one side of the frustum portion 101. The frustum portion 101 and the disc portion 102 are integrally formed. Rubber rings 12 are fixed to the top surface of both the frustum portion 101 and the top surface of the disc portion 102. The gear ring segment 2 has a first anti-overflow groove 13 and a second anti-overflow groove 14 for the two rubber rings 12 to be inserted. After the hub 1 and the gear ring segment 2 are fixed with fixing screws 11, the two rubber rings 12 will be inserted into the first anti-overflow groove 13 and the second anti-overflow groove 14 respectively. Since the rubber rings 12 have good deformation ability, they can fill... The gap between the hub body 1 and the first anti-overflow groove 13 and the second anti-overflow groove 14 effectively ensures the sealing performance of the hub body 1 and the gear ring section 2 after they are joined, reducing the possibility of coolant leaking from the joint between the hub body 1 and the gear ring section 2. The first anti-overflow groove 13 is opened on the bottom surface of the gear ring section 2, and the diameter of the first anti-overflow groove 13 is larger than the diameter of the second anti-overflow groove 14. The distance from the threaded hole 10 to the center of the bottom surface of the gear ring section 2 is larger than the radius of the first anti-overflow groove 13. This setting ensures that when the fixing screw 11 fixes the hub body 1 to the gear ring section 2, some of the coolant that seeps into the gap between the hub body 1 and the gear ring section 2 will be blocked by the rubber ring 12. The obstruction prevents coolant from seeping into the threaded hole 10 or the through hole 9, thus effectively preventing coolant from leaking out from the hub body 1 and the gear ring section 2, ensuring the sealing performance after the hub body 1 and the gear ring section 2 are fitted together. The diameter of the disc portion 102 is smaller than the root circle diameter of the gear tooth 4. This design ensures that after the hub body 1 and the gear ring section 2 are fixed, the disc portion 102 will not be exposed between the gear teeth 4, avoiding the influence of the disc portion 102 on the meshing of the gear teeth 4. An oil inlet 15 with a connecting annular groove 8 is provided on the peripheral wall of the circular hole 3. A sealing plug is detachably connected to the oil inlet 15. After the bevel gear has been running for a period of time, it is necessary to add oil to the flow groove 7. Cooling oil is added to the annular groove 8. After removing the bevel gear from the shaft and taking out the sealing plug from the oil inlet 15, cooling oil can be added to the oil inlet 15. The addition of cooling oil can be completed without disassembling the hub body 1 and the gear ring section 2, making the addition of cooling oil more convenient. The surface of the gear tooth 4 is treated with nitrocarburizing. Nitrocarburizing treatment can form a hardened layer on the surface of the gear tooth 4, improve the smoothness of the surface of the gear tooth 4, not only improve the strength of the surface of the gear tooth 4, but also reduce the friction coefficient of the gear tooth 4, reduce the wear of the bevel gear during operation, and improve the service life of the bevel gear.

[0020] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A bevel gear structure, including a hub, characterized in that: The hub includes a hub body (1) and a gear ring segment (2) fitted on the hub body (1). The hub body (1) has a circular hole (3). The outer peripheral wall of the gear ring segment (2) has a tooth (4). The inner peripheral wall of the gear ring segment (2) has a protruding strip (5). The outer peripheral wall of the hub body (1) has a limiting groove (6) for the protruding strip (5) to be inserted. The protruding strip (5) has a flow groove (7). The outer peripheral wall of the hub body (1) has an annular groove (8). The flow groove (7) and the annular groove (8) together contain cooling oil. The bottom surface of the hub body (1) has a through hole (9). The bottom surface of the gear ring segment (2) has a threaded hole (10) coaxial with the through hole (9). The same fixing screw (11) passes through the through hole (9) and the threaded hole (10).

2. The bevel gear structure according to claim 1, characterized in that: The hub (1) includes a frustum portion (101) and a disc portion (102) fixed to one side of the frustum portion (101). Rubber rings (12) are fixed on the top surface of the frustum portion (101) and the top surface of the disc portion (102). A first anti-overflow groove (13) and a second anti-overflow groove (14) are provided on the gear ring segment (2) for the two rubber rings (12) to be inserted respectively.

3. The bevel gear structure according to claim 2, characterized in that: The first anti-overflow groove (13) is opened on the bottom surface of the gear ring section (2). The diameter of the first anti-overflow groove (13) is greater than the diameter of the second anti-overflow groove (14). The distance from the threaded hole (10) to the center of the bottom surface of the gear ring section (2) is greater than the radius of the first anti-overflow groove (13).

4. The bevel gear structure according to claim 2, characterized in that: The diameter of the disc portion (102) is smaller than the root circle diameter of the gear tooth (4).

5. The bevel gear structure according to claim 1, characterized in that: The circular hole (3) has an oil inlet (15) that connects to the annular groove (8) on its peripheral wall.

6. The bevel gear structure according to claim 1, characterized in that: The surface of the gear teeth (4) is treated with nitrogen-carbon co-diffusion.

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