Bevel gear assembly for power transmission

Abstract

The utility model provides a kind of bevel gear assembly for transmission, including shaft body and gear, outwardly protruding with mounting arm on the outer circumferential surface of shaft body, mounting arm includes oblique portion and mounting ring, when gear and mounting ring are positioned and connected, inner convex positioning ring rear side end surface and mounting ring front side end surface abut, and the hole wall of mounting ring outer circumferential surface is located with the hole of gear through hole and the right side hole wall of inner convex positioning ring abut;The length of the radial protrusion of inner convex positioning ring and the radial extension length of mounting ring front end end surface are adapted, and the radial extension length of mounting ring front side end surface is greater than the radial extension length of rear side end surface.The utility model structure design is reasonable, and the two sides plane of the outer end of mounting arm for installing gear uses the design of not equal length, it is convenient to distinguish mounting surface quickly when assembling, and speed up assembly rate.Meanwhile, the radius of the connecting arc surface formed in the connecting place of the corresponding shaft body of acute angle side is smaller, so that the position is more stacked, and has stronger load capacity.

Description

Technical Field

[0001] This utility model relates to the technology of transmission components, especially the technology of gear transmission, and particularly to a bevel gear assembly for transmission. Background Technology

[0002] A bevel gear is a mechanical transmission element used to transmit power between two intersecting shafts. Its core characteristic lies in the fact that the gear teeth are distributed along a conical surface, and the contact line of the tooth surfaces during meshing is a spatial curve, enabling smooth and efficient power transmission between non-parallel shafts. Depending on the structural design, an integral structure design can be adopted. In an integral bevel gear, the gear and shaft are a single unit with no connecting parts, formed by forging or casting. This reduces assembly steps, increases production efficiency, and provides strong overall structural rigidity. However, in the production of integral bevel gears, the materials used must simultaneously meet the performance requirements of both the gear and shaft. In practice, since the gear and shaft are made of the same material, it is often difficult to simultaneously meet the requirements of high strength and high toughness; otherwise, the cost would be too high, and the scrap rate would be too high. To address this issue, a split structure design can be adopted in bevel gear design, where the gear and shaft are designed as independent components, connected by keys, interference fits, bolts, etc. In this way, different materials can be used for the gear and shaft; a more wear-resistant material can be used for the gear, while a more tough material can be selected for the shaft. Although the modular structure involves more processing steps and requires assembly after production compared to the monolithic structure, it offers higher material utilization and lower overall cost. Furthermore, the gears and shafts utilize independent design parameters, allowing for the assembly of different gears onto the same shaft as needed, and enabling modular and standardized configuration combinations.

[0003] However, during the production and assembly process, the contact method between the gear and the mounting arm extending from the shaft needs to be clearly defined during gear and shaft orientation. The mounting direction must be clearly identified before further assembly, especially with longer shafts. It is crucial to distinguish and confirm the mounting surfaces from both ends of the gear before formal assembly; otherwise, if the tooth surface direction is reversed, disassembly and reassembly are necessary, resulting in low assembly efficiency. Therefore, for existing split bevel gear assemblies, improving assembly efficiency while ensuring load-bearing capacity and gear strength remains a design challenge requiring further refinement. Utility Model Content

[0004] The technical problem to be solved by this utility model is: in order to overcome the shortcomings of the prior art, this utility model provides a bevel gear assembly for transmission. Based on the split design, while ensuring load strength and gear strength, it can further accelerate gear direction positioning and improve assembly speed, thereby effectively reducing production costs.

[0005] The technical solution adopted by this utility model to solve its technical problem is as follows: a bevel gear assembly for transmission, including a shaft and a gear separately connected to the shaft. A mounting arm extends outward from the outer circumferential surface of the shaft. The mounting arm includes an inclined portion and a mounting ring. One end of the inclined portion is fixed to the shaft, and the other end is fixed to the mounting ring. The gear has a through hole at its center for the shaft to pass through. The inner wall of the through hole protrudes circumferentially in the axial direction of the through hole, and an inner convex positioning ring is formed. At least three first mounting holes are evenly distributed around the gear axis on the inner convex positioning ring. When the gear is positioned and connected to the mounting ring, the rear end face of the inner convex positioning ring abuts against the front end face of the mounting ring, and the outer circumferential surface of the mounting ring abuts against the hole wall of the gear through hole located on the right side of the inner convex positioning ring; the mounting ring is provided with a second mounting hole corresponding to the first mounting hole, and the mounting ring and the gear are locked and fixed by bolt assemblies in the first and second mounting holes; the radial protrusion length of the inner convex positioning ring is adapted to the radial extension length of the front end face of the mounting ring, and the radial extension length of the front end face of the mounting ring is greater than the radial extension length of the rear end face.

[0006] In the above solution, based on the split shaft and gear, the shaft and gear have been further improved. The two sides of the mounting ring are designed with unequal lengths, which makes it easier to identify the direction intuitively, quickly and clearly during alignment and installation, and facilitates installation according to positioning requirements. At the same time, the contact surface is larger and the reliability is higher.

[0007] Furthermore, to further improve the reliability of the assembly, both the first mounting hole and the second mounting hole are parallel to the axis of the shaft.

[0008] Furthermore, the mounting arm has a front transition arc surface between its front side and the outer circumferential surface of the shaft, and a rear transition arc surface between its rear side and the outer circumferential surface of the shaft. The angle between the front side of the mounting arm and the outer circumferential surface of the shaft is an acute angle, and the radius of the front transition arc surface is smaller than the radius of the rear transition arc surface. This transition arc surface design effectively smooths the connection between the mounting arm and the shaft, while allowing for more material to be deposited on the side facing the gear, further enhancing the mounting arm's load-bearing capacity.

[0009] Furthermore, the shaft, the inclined portion, and the mounting ring are an integral structure.

[0010] Preferably, in the design of the inclined section, the inclined section is a butterfly-shaped structure with an opening at the center, and the inner wall of the opening is integral with the outer peripheral surface of the shaft.

[0011] Preferably, in the inclined section design, the inclined section includes an arm body corresponding to the number of first mounting holes. The arm bodies and the first mounting holes are distributed circumferentially on the outer peripheral surface of the shaft body in a one-to-one correspondence, that is, each position of the first mounting hole corresponds to one arm body, and the mounting ring is integrally connected to the outer end of the arm body.

[0012] Furthermore, the shaft body has reinforced shoulders protruding from the front and rear sides of the mounting arm section. The end faces of the reinforced shoulders on the front and rear sides away from the mounting arm are parallel to the plane of the radial section of the shaft body, while the end faces near the mounting arm are connected to the outer peripheral surface of the shaft body by a transition slope.

[0013] Furthermore, when the gear is connected and fastened to the mounting arm, along the axis of the shaft, the front side of the gear is located at the transition slope of the front reinforced shaft shoulder, so that after the gear is installed and fixed, the shaft provides further load support to the front and rear sides of the shaft.

[0014] The beneficial effects of this utility model are that the bevel gear assembly for transmission provided by this utility model has a reasonable structural design. The gear and shaft adopt a split design, and a mounting arm extends outward from the shaft. The two sides of the mounting arm at the outer end for mounting the gear have unequal lengths, which facilitates quick differentiation of the mounting surface during assembly and speeds up the assembly process. At the same time, in the design of the mounting arm, the radius of the connecting arc surface formed by the shaft on the acute angle side of the mounting arm and the mounting arm is smaller, allowing for more material to be piled up at this position, resulting in a stronger load-bearing capacity. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0016] Figure 1 This is a schematic diagram of the preferred embodiment of the present invention.

[0017] In the figure: 1. Reinforced shoulder; 2. Transition arc surface; 3. Bolt assembly; 4. Gear; 5. First mounting hole; 6. Mounting ring; 7. Second mounting hole; 8. Angled part; 9. Shaft body; 10. Transition inclined surface; 11. Inner positioning convex ring. Detailed Implementation

[0018] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention. Therefore, they only show the components relevant to the present invention. Orientations and references (e.g., up, down, left, right, etc.) are only used to aid in the description of the features in the drawings. Therefore, the following specific embodiments are not intended to be restrictive, and the scope of the claimed subject matter is defined solely by the appended claims and their equivalents.

[0019] like Figure 1The bevel gear assembly for transmission shown is an embodiment of this utility model. The bevel gear assembly for transmission includes a shaft 9 and a gear 4 that is separately connected to the shaft 9. A mounting arm extends outward from the outer circumferential surface of the shaft 9. The mounting arm includes an inclined portion 8 and a mounting ring 6. The shaft 9, the inclined portion 8, and the mounting ring 6 are an integral structure.

[0020] In the design of the inclined section 8 in Embodiment 1, the inclined section 8 is a butterfly-shaped structure with an opening at its center. The inner wall of the opening is integrally formed with the outer circumferential surface of the shaft 9. One end of the inclined section 8 is fixed to the shaft 9, and the other end is fixed to the mounting ring 6. In this embodiment, the outer edge of the butterfly-shaped structure extends outward, and the extended annular structure is the mounting ring 6.

[0021] The gear 4 has a through hole at its center for the shaft 9 to pass through. The inner wall of this through hole protrudes circumferentially along its axis, forming an inner convex positioning ring 11. At least three first mounting holes 5 are evenly distributed around the axis of the gear 4. When the gear 4 is positioned and connected to the mounting ring 6, the rear end face of the inner convex positioning ring 11 abuts against the front end face of the mounting ring 6, while the outer circumferential surface of the mounting ring 6 abuts against the wall of the through hole of the gear 4 located to the right of the inner convex positioning ring 11. The mounting ring 6 has second mounting holes 7 corresponding one-to-one with the first mounting holes 5. Both the first mounting holes 5 and the second mounting holes 7 are parallel to the axis of the shaft 9. The mounting ring 6 and the gear 4 are locked and fixed by bolt assemblies 3 connected in the first mounting holes 5 and the second mounting holes 7. The radial protrusion length of the inner convex positioning ring 11 matches the radial extension length of the front end face of the mounting ring 6, and the radial extension length of the front end face of the mounting ring 6 is greater than the radial extension length of the rear end face.

[0022] There is a front transition arc surface 2 between the front side of the mounting arm and the outer peripheral surface of the shaft 9, and a rear transition arc surface 2 between the rear side of the mounting arm and the outer peripheral surface of the shaft 9. The angle between the front side of the mounting arm and the outer peripheral surface of the shaft 9 is an acute angle, and the radius of the front transition arc surface 2 is smaller than the radius of the rear transition arc surface 2. Through the design of the transition arc surface 2, the connection between the mounting arm and the shaft 9 can be effectively smoothed, and more material can be piled on the side that receives the gear 4, further improving the load-bearing capacity of the mounting arm.

[0023] The shaft 9 has reinforcing shoulders 1 protruding from both the front and rear sides corresponding to the mounting arm section. The end faces of the reinforcing shoulders 1 on the front and rear sides away from the mounting arm are parallel to the plane of the radial section of the shaft 9, while the end faces near the mounting arm are connected to the outer circumferential surface of the shaft 9 by transition slopes 10. When the gear 4 is connected and fastened to the mounting arm, along the axial direction of the shaft 9, the front side of the gear 4 is located at the middle position of the transition slope 10 of the front reinforcing shoulder 1, so that after the gear 4 is installed and fixed, the shaft 9 provides further load support on both the front and rear sides.

[0024] This transmission bevel gear assembly features a rational structural design, with gear 4 and shaft 9 being separate components. The asymmetrical lengths on both sides of the mounting ring 6 facilitate quick and easy orientation during alignment, allowing for rapid differentiation of mounting surfaces during assembly and accelerating the assembly process. This also results in a larger contact area and higher reliability. The asymmetrical lengths on the two sides of the mounting arm for mounting gear 4, along with the outward extension of the mounting arm on shaft 9, allow for greater material accumulation and a stronger load-bearing capacity. In the design of the mounting arm, the radius of the connecting arc formed at the connection point between shaft 9 and the mounting arm is smaller on the side with the acute angle to the extension direction, allowing for greater material accumulation at that location.

[0025] Example 2: This utility model also has a second embodiment, which differs from the first embodiment in that the design of the oblique part 8 is different.

[0026] In the second embodiment, the inclined part 8 includes an arm body corresponding to the number of first mounting holes 5. The arm bodies are distributed circumferentially on the outer circumferential surface of the shaft body 9 in a one-to-one correspondence with the first mounting holes 5, that is, each position of the first mounting hole 5 corresponds to one arm body, and the mounting ring 6 is integrally connected to the outer end of the arm body.

[0027] Compared to Embodiment 1, Embodiment 2 can save more raw materials at the oblique part 8 position, but its load-bearing capacity is slightly lower than that of the butterfly structure. In actual selection, the choice can be made according to the actual needs of the bevel gear assembly.

[0028] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A bevel gear assembly for transmission, comprising a shaft and a gear separately connected to the shaft, characterized in that: The shaft body has an outwardly extending mounting arm on its outer circumferential surface. The mounting arm includes an inclined portion and a mounting ring. One end of the inclined portion is fixed to the shaft body, and the other end is fixed to the mounting ring. The gear has a through hole at its center for the shaft to pass through. The inner wall of the through hole protrudes circumferentially in the direction of its axis and has an inner convex positioning ring. The inner convex positioning ring has at least three first mounting holes evenly distributed around the gear axis. When the gear is positioned and connected to the mounting ring, the rear end face of the inner convex positioning ring abuts against the front end face of the mounting ring, and the outer circumferential surface of the mounting ring abuts against the hole wall of the gear through hole located on the right side of the inner convex positioning ring. The mounting ring is provided with a second mounting hole that corresponds one-to-one with the first mounting hole. The mounting ring and the gear are locked and fixed by a bolt assembly in the first and second mounting holes. The radial protrusion length of the inner convex positioning ring is adapted to the radial extension length of the front end face of the mounting ring, and the radial extension length of the front end face of the mounting ring is greater than the radial extension length of the rear end face.

2. The bevel gear assembly for transmission as described in claim 1, characterized in that: Both the first mounting hole and the second mounting hole are parallel to the axis of the shaft.

3. A bevel gear assembly for transmission as described in claim 1, characterized in that: The mounting arm has a front transition arc surface between its front side and the outer peripheral surface of the shaft, and a rear transition arc surface between its rear side and the outer peripheral surface of the shaft. The angle between the front side of the mounting arm and the outer peripheral surface of the shaft is an acute angle, and the radius of the front transition arc surface is smaller than the radius of the rear transition arc surface.

4. A bevel gear assembly for transmission as described in claim 1, characterized in that: The shaft, the inclined section, and the mounting ring are an integral structure.

5. A bevel gear assembly for transmission as described in claim 4, characterized in that: The oblique part is a butterfly-shaped structure with an opening at the center of the butterfly-shaped interface. The inner wall of the opening is integral with the outer peripheral surface of the shaft.

6. A bevel gear assembly for transmission as described in claim 4, characterized in that: The inclined portion includes an arm body corresponding to the number of first mounting holes. The arm bodies and the first mounting holes are distributed circumferentially on the outer peripheral surface of the shaft body in a one-to-one correspondence. The mounting ring is integrally connected to the outer end of the arm body.

7. A bevel gear assembly for transmission as described in claim 1, characterized in that: The shaft body has reinforced shoulders protruding from the front and rear sides of the mounting arm section. The end faces of the reinforced shoulders on the front and rear sides away from the mounting arm are parallel to the plane of the radial section of the shaft body, while the end faces near the mounting arm are connected to the outer peripheral surface of the shaft body by a transition slope.

8. A bevel gear assembly for transmission as described in claim 7, characterized in that: When the gear is fastened to the mounting arm, along the axis of the shaft, the front side of the gear is located at the transition slope of the front reinforced shoulder.

Images