Low-noise modification helical tooth surface tooth pair

Abstract

The utility model discloses a low-noise modification helical tooth surface tooth pair. The helical tooth surface tooth pair comprises a face gear and a cylindrical helical gear which are meshed with each other, a plurality of holes are formed in a spoke of the face gear, a shaft hole is formed in the middle of the face gear, a hub is arranged on one side of the shaft hole, and gear teeth are arranged on the rim side of the face gear. The radial tooth profile edge of the gear teeth is in R-angle transition, and the two radial side faces of the gear teeth are chamfered inwards. The helical tooth surface gear pair is high in contact ratio, the shape correction adjustment of a contact area is in an ideal state, the influence of burr removal on gear meshing is considered, and the noise is obviously improved.

Description

Technical Field

[0001] The utility model relates to the technical field of face gears, and particularly relates to a low-noise modified helical face gear pair. Background Technique

[0002] Face gear transmission is a transmission in which a cylindrical helical gear meshes with a face gear. According to the shape of the tooth profile, face gears can be divided into three types: straight teeth, helical teeth, and spiral bevel teeth. According to the relative position relationship between the two gear shafts, it is divided into two types: intersecting and staggered. Since the face gear meshes with the cylindrical gear, the tooth thickness at the inner diameter position is thin, and the tooth tip becomes pointed at the outer diameter position. Therefore, traditional face gears are suitable for transmitting lower loads. With the development of precision face gear grinding technology, face gears have been increasingly applied to high-speed and heavy-load transmission working conditions.

[0003] In the prior art, a face gear formed by integral molding of stainless steel powder, such as Figures 3 to 4 shown, when no modification design is carried out on the face gear, the meshing area between the face gear and the cylindrical helical gear is biased towards the inner side, and burrs are likely to be generated at the edge of the face gear after powder pressing and molding. When the cylindrical helical gear meshes and contacts the burrs, impacts are formed, resulting in abnormal noise during operation. Content of the Utility Model

[0004] The purpose of the utility model is to provide a low-noise modified helical face gear pair with a small noise, in which the meshing area between the face gear and the cylindrical helical gear is located in the middle part, aiming at the deficiencies existing in the prior art.

[0005] To achieve the above purpose, the technical solution adopted by the utility model is: a low-noise modified helical face gear pair, including a face gear and a cylindrical helical gear that mesh with each other. A plurality of holes are provided inside the spoke of the face gear. There is a shaft hole in the middle of the face gear. There is a hub on one side of the shaft hole. Teeth are provided on the rim side of the face gear. After modification, the meshing area between the face gear and the cylindrical helical gear is located in the middle of the teeth. The tooth profile edge of the face gear is transitioned with an R angle, and chamfers are made inward on the radial two sides of the teeth.

[0006] Preferably, the tooth profile of the face gear is processed with crowned teeth modification, the modification amount is 0.01 - 0.03, and the tooth width of the contact area is 40 - 50%.

[0007] Preferably, clearance angles are added inside and outside the tooth profile of the face gear.

[0008] Preferably, chamfers are made at the edge of the hole facing the hub side, and fillets are made at the connection between the chamfer and the spoke. The edge of the hole facing the tooth side is stretched obliquely outward, and fillets are made at the connection between the stretch and the spoke.

[0009] Preferably, the edge of the shaft hole facing the tooth side is stretched obliquely, and a fillet is made at the connection between the stretch and the spoke.

[0010] Preferably, the inner wall edge of the hub is chamfered, the outer wall edge of the hub is stretched obliquely, and a fillet is made at the connection between the stretch and the upper end face of the hub, and a fillet is made at the connection between the hub and the spoke.

[0011] Preferably, the edge of the rim facing the hub is stretched obliquely outwards, and a fillet is made at the connection between the stretch and the outer side wall of the rim.

[0012] Preferably, a fillet is made at the connection between the gear teeth and the spoke.

[0013] Preferably, the face gear and the helical cylindrical gear are both integrally formed by pressing stainless steel powder.

[0014] Compared with the prior art, the present utility model has the following advantages: by performing a crowned tooth modification treatment on the tooth profile of the face gear, with a modification amount of 0.01 - 0.03 and a contact zone tooth width of 40 - 50%, the meshing zone between the face gear and the helical cylindrical gear is controlled in the middle part, and chamfering and rounding treatments are performed on various parts of the gear teeth of the face gear, especially chamfering and rounding treatments are performed on the tooth profile edges of the gear teeth, reducing the influence of burrs generated during the pressing and forming process on the meshing zone, thereby reducing the noise generated during operation. Description of the Drawings

[0015] Figure 1 is the first axonometric view of the present utility model.

[0016] Figure 2 is the second axonometric view of the present utility model.

[0017] Figure 3 is the axonometric view of the meshing of the face gear and the helical cylindrical gear in the prior art.

[0018] Figure 4 is the schematic view of the meshing zone of the face gear and the helical cylindrical gear in the prior art.

[0019] Figure 5 is the schematic view of the meshing contact spot of the face gear and the helical cylindrical gear in the present utility model.

[0020] Among them, 1 - face gear, 11 - shaft hole, 12 - spoke, 13 - hole, 14 - gear tooth, 15 - hub, 16 - rim, 2 - helical cylindrical gear. Detailed Embodiments

[0021] The present utility model will be further clarified below in conjunction with the drawings and specific embodiments. It should be understood that these embodiments are only used to illustrate the present utility model and not to limit the scope of the present utility model. After reading the present utility model, various equivalent modifications made by those skilled in the art to the present utility model all fall within the scope defined by the appended claims of this application.

[0022] AsFigures 1 to 2 The shown low-noise modified helical face gear pair includes a face gear 1 and a cylindrical helical gear 2 that mesh with each other. Both the face gear 1 and the cylindrical helical gear 2 are integrally formed by pressing stainless steel powder. Six holes 13 are provided inside the spoke 12 of the face gear 1. A shaft hole 11 is provided in the middle of the face gear 1. A hub 15 is provided on one side of the shaft hole 11. Teeth 14 are provided on the rim 16 side of the face gear 1. The tooth profile of the face gear 1 is processed with crowned teeth modification, with a modification amount of 0.01 - 0.03 and a contact zone tooth width of 40 - 50%. Clearance angles are added inside and outside the tooth profile of the face gear, such as Figure 5 shown in the figure, after modification, the meshing zone of the face gear 1 and the cylindrical helical gear 2 is located in the middle of the teeth 14. The edge of the tooth profile of the face gear 1 is transitioned with an R angle, and chamfers are made inward on the radial two sides of the teeth 14.

[0023] Chamfers are made at the edges of the holes 13 facing the hub 15, and fillets are made at the connections between the chamfers and the spokes 12. The edges of the holes 13 facing the teeth 14 are stretched obliquely outward, and fillets are made at the connections between the stretches and the spokes 12. The edges of the shaft hole 11 facing the teeth 14 are stretched obliquely, and fillets are made at the connections between the stretches and the spokes 12. Chamfers are made at the inner wall edges of the hub 15, the outer wall edges of the hub 15 are stretched obliquely, and fillets are made at the connections between the stretches and the upper end faces of the hub 15. Fillets are made at the connections between the hub 15 and the spokes 12. The edges of the rim 16 facing the hub 15 are stretched obliquely outward, and fillets are made at the connections between the stretches and the outer side walls of the rim 16. Fillets are made at the connections between the teeth 14 and the spokes 12. Burrs are likely to be generated at the connections and edge parts of each part of the face gear 1 formed by pressing stainless steel powder. By chamfering and filleting each part, the generation of burrs is reduced.

[0024] The working process and principle of the present utility model: Through the modification treatment of the face gear 1, the meshing zone between the face gear 1 and the cylindrical helical gear 2 is controlled in the middle, chamfers are made inward on the radial two sides of the gear, and an R angle treatment is performed on the radial tooth profile edges of the teeth 14 to avoid the impact of burrs on the helical gear meshing, thereby reducing the generation of noise.

[0025] The above description shows and describes the preferred embodiments of the present utility model. As mentioned above, it should be understood that the present utility model is not limited to the form disclosed herein, should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications, and environments, and can be changed within the scope of the inventive concept described herein through the above teachings or the technology or knowledge in related fields. And any changes and modifications made by those skilled in the art without departing from the spirit and scope of the present utility model should fall within the protection scope of the appended claims of the present utility model.

Claims

1. A low-noise modified helical face gear pair, comprising a face gear and a cylindrical helical gear that mesh with each other. A plurality of holes are provided inside the spoke of the face gear. A shaft hole is provided in the middle of the face gear. A hub is provided on one side of the shaft hole. Teeth are provided on the rim side of the face gear, and it is characterized in that: After modification, the meshing area of the face gear and the helical cylindrical gear is located in the middle of the tooth, the tooth profile edge of the face gear is transitioned with an R angle, and chamfers are made inward on the radial two sides of the tooth.

2. The low-noise modified helical face gear pair according to claim 1, wherein: The tooth profile of the face gear is processed with crowned teeth modification, the modification amount is 0.01 - 0.03, and the tooth width of the contact area is 40 - 50%.

3. The low-noise modified helical face gear pair according to claim 1, characterized in that: Clearance angles are added inside and outside the tooth profile of the face gear.

4. The low-noise modified helical face gear pair according to claim 1, wherein: Chamfers are made at the edge of the hole facing the hub side, and fillets are made at the connection between the chamfer and the spoke. The edge of the hole facing the tooth side is stretched obliquely outward, and fillets are made at the connection between the stretch and the spoke.

5. The low-noise modified helical face gear pair according to claim 1, wherein: The edge of the shaft hole facing the tooth side is stretched obliquely, and fillets are made at the connection between the stretch and the spoke.

6. The low-noise modified helical face gear pair according to claim 1, characterized in that: Chamfers are made at the inner wall edge of the hub, the outer wall edge of the hub is stretched obliquely, and fillets are made at the connection between the stretch and the upper end face of the hub. Fillets are made at the connection between the hub and the spoke.

7. The low-noise modified helical face gear pair according to claim 1, wherein: The edge of the rim facing the hub side is stretched obliquely outward, and fillets are made at the connection between the stretch and the outer wall of the rim.

8. The low-noise modified helical face gear pair according to claim 1, characterized in that: Fillets are made at the connection between the tooth and the spoke.

9. The low-noise modified helical face gear pair according to claim 1, wherein: Both the face gear and the helical cylindrical gear are integrally formed by pressing stainless steel powder.

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