Bevel gear

Abstract

The utility model discloses a bevel gear relates to gear technical field, and its technical scheme main points are: including wheel hub and bevel gear, the wheel hub is detachably connected with the shaft handle, the keyway is seted up in the shaft handle, the bottom surface of wheel hub is equipped with the thread hole, the bottom surface of wheel hub is equipped with annular protrusion, the recess is seted up on annular protrusion, the annular groove is seted up on the shaft handle, is equipped with the boss in annular groove, the perforation is seted up on the shaft handle, and the same fixed bolt is passed in the perforation and the thread hole, when the bevel gear of bevel gear appears abrasion and cannot repair, through with fixed bolt from the perforation and the thread hole dismantling, makes the shaft handle can with the wheel hub separation, will brand new wheel hub reinstallation on the shaft handle, make the sound shaft handle can be repeatedly used, reduce the waste of material, the boss is aligned recess, then annular protrusion is embedded in the annular groove and makes the boss card in recess, such setting makes the shaft handle and the wheel hub can keep the concentricity of good while also not easy to happen relative rotation.

Description

Technical Field

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

[0002] A bevel gear is a type of gear with a bevel structure that can be used to transmit power between intersecting shafts. It is widely used in mechanical transmission. A bevel gear typically includes a hub and bevel teeth set on the outer peripheral wall of the hub. The side wall of the hub is usually machined to form a shank to increase the contact area between the bevel gear and the shaft.

[0003] Most existing bevel gears are connected to the shaft with a key, which usually results in a keyway in the shaft. During transmission, the wear of the bevel gear is mainly concentrated near the bevel teeth. When the wear exceeds the requirements, the entire bevel gear needs to be replaced, and the intact parts such as the shaft cannot be reused, resulting in a waste of resources.

[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.

[0006] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a bevel gear, including a hub and bevel teeth fixed on the outer peripheral wall of the hub, a shaft detachably connected to the hub, a keyway being provided in the shaft, a plurality of threaded holes arranged circumferentially on the bottom surface of the hub, an annular protrusion located outside the threaded holes on the bottom surface of the hub, a groove being provided on the annular protrusion, an annular groove being provided on the shaft for the annular protrusion to be inserted, a protrusion being provided in the annular groove for being inserted into the groove, and a through hole coaxially arranged with the threaded holes being provided on the shaft, and the same fixing bolt passing through the through hole and the threaded holes.

[0007] The present invention is further configured such that: the perforation includes a countersunk hole and a round hole, the inner diameter of the countersunk hole is larger than the inner diameter of the round hole, and the fixing bolt is completely submerged in the countersunk hole.

[0008] The present invention is further configured such that: the keyway is formed on the side of the shaft shank near the protrusion, and the center surface of the keyway coincides with the center surface of the protrusion.

[0009] The present invention is further configured such that the number of perforations is three, and the three perforations are symmetrically distributed about the central surface of the protrusion.

[0010] The present invention is further configured such that: the two opposite sidewalls of the protrusion are provided with oblique cut surfaces, and the surface area of ​​the sidewall of the protrusion away from the bottom wall of the annular groove is smaller than the surface area of ​​the part where the protrusion and the bottom wall of the annular groove are in contact.

[0011] The present invention is further configured such that: a tool relief groove is provided on the outer peripheral wall of the annular groove, which is close to the oblique cut surface.

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

[0013] When the bevel teeth of a bevel gear are worn and cannot be repaired, the fixing bolts can be removed from the through holes and threaded holes to release the bolts' restriction on the shaft and hub, allowing the shaft to be separated from the hub. A brand new hub can then be reinstalled on the shaft, allowing the intact shaft to be reused and reducing material waste. During installation, the protrusion needs to be aligned with the groove, and then the annular protrusion is inserted into the annular groove so that the protrusion is engaged in the groove. This design ensures good concentricity between the shaft and hub and prevents relative rotation. Furthermore, the protrusion engaged in the groove aligns the through holes and threaded holes, eliminating the need for visual alignment when using fixing bolts to secure the hub and shaft, making the fixing of the hub and shaft faster. 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 structure of the central shaft handle of this utility model.

[0016] In the diagram: 1. Hub; 2. Bevel gear; 3. Shaft handle; 4. Keyway; 5. Threaded hole; 6. Annular protrusion; 7. Groove; 8. Annular groove; 9. Protrusion; 10. Fixing bolt; 11. Countersunk hole; 12. Round hole; 13. Beveled surface; 14. Unsinking groove. Detailed Implementation

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

[0018] A type of bevel gear, such as Figure 1 and Figure 2As shown, the bevel gear includes a hub 1 and bevel teeth 2 fixed to the outer circumferential wall of the hub 1. A shaft 3 is detachably connected to the hub 1. A keyway 4 for accommodating a key is provided in the shaft 3. Several threaded holes 5 arranged circumferentially around the hub 1 are provided on the bottom surface of the hub 1. An annular protrusion 6 located outside the threaded holes 5 is provided on the bottom surface of the hub 1. A groove 7 is provided on the annular protrusion 6. An annular groove 8 for the annular protrusion 6 to be inserted is provided on the shaft 3. A protrusion 9 for the groove 7 to be inserted is provided in the annular groove 8. A through hole coaxial with the threaded holes 5 is provided on the shaft 3. The same fixing bolt 10 passes through the through hole and the threaded hole 5. When the bevel teeth 2 of the bevel gear are worn and cannot be repaired, the fixing bolt 10 can be removed from the through hole and the threaded hole 5 to release the fixing bolt 10 from the shaft 3 and the hub 1, so that the shaft 3 can be separated from the hub 1. Then, a brand new hub 1 can be reassembled. Installed on the shaft handle 3, the intact shaft handle 3 can still be reused, reducing material waste. During installation, the protrusion 9 needs to be aligned with the groove 7, and then the annular protrusion 6 is embedded in the annular groove 8 so that the protrusion 9 is locked in the groove 7. This setting allows the shaft handle 3 and the hub 1 to maintain good concentricity and is not easy to rotate relative to each other. Moreover, the protrusion 9 locked in the groove 7 can align the through hole and the threaded hole 5, eliminating the need for people to visually align the through hole and the threaded hole 5 when using the fixing bolt 10 to fix the hub 1 and the shaft handle 3, making the fixing of the hub 1 and the shaft handle 3 faster. A limiting hole communicating with the keyway 4 is opened on the outer peripheral wall of the shaft handle 3. A limiting bolt for abutting the key surface is threaded in the limiting hole. When the bevel gear is installed on the shaft, the limiting bolt is used to limit the shaft handle 3 and the key, so that the bevel gear is not easy to move relative to the shaft during operation.

[0019] like Figure 1 and Figure 2As shown, the perforation includes a countersunk hole 11 and a round hole 12. The inner diameter of the countersunk hole 11 is larger than the inner diameter of the round hole 12. The fixing bolt 10 is completely submerged in the countersunk hole 11, and the depth of the countersunk hole 11 is greater than the length of the head of the fixing bolt 10. This arrangement ensures that when the fixing bolt 10 fixes the shaft shank 3 to the hub 1, the head of the fixing bolt 10 will not protrude from the side wall of the shaft shank 3, preventing interference with the shaft or other parts. This allows the bevel gear to adapt well to various working environments. The protrusion 9 is integrally formed with the shaft shank 3, ensuring the connection strength between the protrusion 9 and the shaft shank 3. The keyway 4 is formed near the protrusion on the shaft shank 3. On one side of block 9, the center surface of keyway 4 coincides with the center surface of protrusion 9. During shaft operation, torque is transmitted to the key, and then to the shaft shank 3 through the contact between the key and the inner wall of keyway 4, causing the bevel gear to rotate synchronously with the shaft. Since protrusion 9, which is integrally formed with shaft shank 3, can strengthen the local strength of shaft shank 3, keyway 4 is opened on the side close to protrusion 9, so that the position of keyway 4 on shaft shank 3 is reinforced by protrusion 9, which can improve the torsional strength of keyway 4 on shaft shank 3. The number of perforations is at least three, and the three perforations are symmetrically distributed about the center surface of protrusion 9. This arrangement of three perforations is necessary to make The shaft 3 and hub 1 are fixed with three fixing bolts 10 to ensure the fixing strength between the shaft 3 and hub 1. The two opposite sidewalls of the protrusion 9 are provided with beveled surfaces 13. The surface area of ​​the sidewall of the protrusion 9 away from the bottom wall of the annular groove 8 is smaller than the surface area of ​​the contact surface between the protrusion 9 and the bottom wall of the annular groove 8. This design ensures that the surface area of ​​the sidewall of the protrusion 9 away from the bottom wall of the annular groove 8 is smaller than the opening area of ​​the groove 7, facilitating the embedding of the protrusion 9 into the groove 7. The connection between the beveled surface 13 and the sidewall of the protrusion 9 is smoothly transitioned; specifically, a rounded corner is machined at the connection between the beveled surface 13 and the sidewall of the protrusion 9. This design ensures that when the bevel gear rotates… The connection between the beveled surface 13 and the side wall of the protrusion 9 will abut against the side wall of the groove 7. The smooth transition will not generate shear stress on the side wall of the groove 7, and can play a good protective role for the side wall of the groove 7. A relief groove 14 is provided on the outer peripheral wall of the annular groove 8 near the beveled surface 13. Specifically, the beveled surface 13 is formed by milling cutter on the side wall of the protrusion 9. The relief groove 14 allows the milling cutter to leave the shaft shank 3 from the relief groove 14 after forming the beveled surface 13. The surface of the bevel gear 2 is carburized and quenched. The carburizing and quenching process can effectively improve the surface strength of the bevel gear 2 and reduce the possibility of wear during operation.

[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, comprising a hub (1) and bevel teeth (2) fixed on the outer peripheral wall of the hub (1), characterized in that: A detachable shaft (3) is connected to the hub (1). A keyway (4) is provided in the shaft (3). A plurality of threaded holes (5) arranged circumferentially on the bottom surface of the hub (1) are provided. An annular protrusion (6) located outside the threaded hole (5) is provided on the bottom surface of the hub (1). A groove (7) is provided on the annular protrusion (6). An annular groove (8) for the annular protrusion (6) to be inserted is provided on the shaft (3). A protrusion (9) for being inserted into the groove (7) is provided in the annular groove (8). A through hole coaxially arranged with the threaded hole (5) is provided on the shaft (3). The same fixing bolt (10) passes through the through hole and the threaded hole (5).

2. A bevel gear according to claim 1, characterized in that: The perforation includes a countersunk hole (11) and a round hole (12). The inner diameter of the countersunk hole (11) is larger than the inner diameter of the round hole (12). The fixing bolt (10) is fully embedded in the countersunk hole (11).

3. A bevel gear according to claim 2, characterized in that: The keyway (4) is located on the side of the shaft (3) near the protrusion (9), and the center surface of the keyway (4) coincides with the center surface of the protrusion (9).

4. A bevel gear according to claim 1, characterized in that: The number of perforations is three, and the three perforations are symmetrically distributed about the central plane of the protrusion (9).

5. A bevel gear according to claim 1, characterized in that: The protrusion (9) has oblique cut surfaces (13) on its two opposite sidewalls. The surface area of ​​the sidewall of the protrusion (9) away from the bottom wall of the annular groove (8) is smaller than the surface area of ​​the part where the protrusion (9) and the bottom wall of the annular groove (8) are in contact.

6. A bevel gear according to claim 5, characterized in that: The outer peripheral wall of the annular groove (8) is provided with a relief groove (14) located near the oblique cut surface (13).

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