A double gear

Abstract

The utility model discloses a duplex gear belongs to gear manufacturing technical field, and its technical key points include the pivot, is connected with the first gear on the pivot, and the detachable connection has the second gear on the pivot of first gear one side, the surface on the pivot and the first gear and the second gear junctions all is equipped with the spline, is equipped with the limiting structure for avoiding the rotation of second gear between the pivot and the second gear, the utility model aims at providing a duplex gear that simple structure, convenient maintenance is used for the automobile gearbox or other mechanical transmission device.

Description

Technical Field

[0001] This utility model relates to a gear structure, and more specifically, to a double gear. Background Technology

[0002] Double gears are widely used in automotive gearboxes or other mechanical transmission devices. As the name suggests, a double gear consists of two coaxial gears integrated into one unit. They are generally not of the same module, but in special cases they can be of the same module. Their function is to change the rotational speed and velocity of the output shaft.

[0003] Early double-gear blanks were generally produced using axial split-die forging. Although the process was simple, it resulted in high material consumption due to the need to remove burrs, complex material flow, and significant differences in microstructure and mechanical properties between different parts of the product, easily leading to substantial machining and heat treatment deformation. This method was not only difficult to process and costly in terms of materials, but also required the entire gear to be replaced when it wore out, further increasing operating costs. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of the prior art by providing a double gear with a simple structure and convenient maintenance.

[0005] The technical solution of this utility model is implemented as follows: a double gear includes a rotating shaft, a first gear is connected to the rotating shaft, and a second gear is detachably connected to the rotating shaft on one side of the first gear. Splines are provided on the surfaces of the rotating shaft where it connects to the first gear and the second gear. A limiting structure is provided between the rotating shaft and the second gear to prevent the second gear from rotating.

[0006] In the aforementioned double gear, the diameter of the connection between the rotating shaft and the first gear is 0.4-0.6 mm smaller than the diameter of the rotating shaft, and the first gear is injection molded on the rotating shaft; a limiting platform is provided at the connection between the rotating shaft and the first gear, and a limiting protrusion adapted to the limiting platform is provided on the inner ring of the first gear.

[0007] In the aforementioned double gear, the limiting platform is provided with a first pin perpendicular to the rotating shaft, and the first pin engages with the first gear.

[0008] In the aforementioned double gear, the limiting structure includes a second pin disposed on the rotating shaft, and a limiting notch is provided on the second gear to cooperate with the second pin.

[0009] In the aforementioned double gear configuration, the diameter of the first gear is larger than that of the second gear.

[0010] In the aforementioned double gear, the first gear has a plurality of first weight-reducing grooves evenly distributed along the circumference on one side, and a second weight-reducing groove that is offset from the first weight-reducing grooves on the other side.

[0011] In the aforementioned double gear, the second gear has several third weight-reducing grooves evenly distributed circumferentially on the side of the first gear away from the first gear.

[0012] With the above-described structure, the rotating shaft, the first gear, and the second gear are manufactured separately, resulting in low material consumption and easy processing. Furthermore, the second gear can be detachably installed on the rotating shaft, facilitating disassembly, replacement, and maintenance.

[0013] By setting splines on the rotating shaft, the friction between the first and second gears and the rotating shaft is increased, thereby improving stability and preventing the first and second gears from moving axially. At the same time, the limiting structure prevents the second gear from rotating radially. Attached Figure Description

[0014] The present invention will be further described in detail below with reference to the embodiments shown in the accompanying drawings, but this does not constitute any limitation on the present invention.

[0015] Figure 1 This is a schematic diagram of the structure of this utility model.

[0016] Figure 2 This is a cross-sectional structural diagram of the present invention.

[0017] Figure 3 This is a schematic diagram of the structure of the rotating shaft of this utility model.

[0018] Figure 4 This is a schematic diagram of the structure of the first gear of this utility model.

[0019] Figure 5 This is a schematic diagram of the structure of the lower side of the first gear of this utility model.

[0020] Figure 6 This is a schematic diagram of the structure of the second gear of this utility model.

[0021] In the diagram: 1. Shaft; 2. First gear; 3. Second gear; 4. Spline; 5. Limiting structure; 6. Limiting platform; 7. Limiting protrusion; 8. First pin; 5a. Second pin; 5b. Limiting notch; 9. First weight-reducing groove; 10. Second weight-reducing groove; 11. Third weight-reducing groove. Detailed Implementation

[0022] See Figure 1-6As shown, this utility model discloses a double gear assembly, including a shaft 1. A first gear 2 is connected to one end of the shaft 1, and a second gear 3 is detachably connected to the shaft 1 on one side of the first gear 2. Splines 4 are provided on the surfaces of the shaft 1 where it connects to the first gear 2 and the second gear 3. A limiting structure 5 is provided between the shaft 1 and the second gear 3 to prevent the second gear 3 from rotating. The shaft, the first gear, and the second gear are manufactured separately, resulting in low material consumption and easy processing. Furthermore, the second gear can be detachably mounted on the shaft, facilitating disassembly, replacement, and maintenance.

[0023] By setting splines on the rotating shaft, the friction between the first and second gears and the rotating shaft is increased, thereby improving stability and preventing the first and second gears from moving axially. At the same time, the limiting structure prevents the second gear from rotating radially.

[0024] In this embodiment, the diameter of the connection between the rotating shaft 1 and the first gear 2 is 0.4-0.6 mm smaller than the diameter of the rotating shaft 1. The first gear 2 is injection molded onto the rotating shaft 1. A limiting platform 6 is provided at the connection between the rotating shaft 1 and the first gear 2, and a limiting protrusion 7 adapted to the limiting platform 6 is provided on the inner ring of the first gear 2. After the first gear is injection molded onto the rotating shaft, the limiting protrusion and the limiting platform cooperate to restrict the first gear, thereby preventing rotation between the first gear and the rotating shaft and preventing the first gear from moving axially along the rotating shaft.

[0025] Preferably, the limiting platform 6 is provided with a first pin 8 perpendicular to the rotating shaft 1, and the first pin 8 cooperates with the first gear 2. After the first gear is injection molded on the rotating shaft, the first pin is inserted into the first gear, which can further limit the first gear and ensure the transmission stability between the first gear and the rotating shaft.

[0026] In this embodiment, the limiting structure 5 includes a second pin 5a disposed on the rotating shaft 1, and a limiting notch 5b on the second gear 3 that cooperates with the second pin 5a. The second pin and the limiting notch restrict the second gear, preventing rotation between the second gear and the rotating shaft.

[0027] In this embodiment, the diameter of the first gear 2 is larger than that of the second gear 3. Depending on actual usage requirements, the diameter of the first gear can also be smaller than that of the second gear. The purpose of this is to allow the first and second gears to have different output speeds. The specific dimensions of both gears are set according to actual usage requirements.

[0028] In this embodiment, the first gear 2 has a plurality of first weight-reducing grooves 9 evenly distributed circumferentially on one side, and a second weight-reducing groove 10 offset from the first weight-reducing grooves 9 on the other side. The depth of the first and second weight-reducing grooves is 80-90% of the thickness of the first gear. By setting the weight-reducing grooves, the weight of the gear is reduced, materials are saved, and inertia is reduced, thereby improving the gear's response speed and transmission efficiency. The offset arrangement of the first and second weight-reducing grooves on both sides can reduce the weight as much as possible while ensuring the strength of the first gear, thus improving the weight-reduction effect.

[0029] In this embodiment, a plurality of third weight-reducing grooves 11 are evenly distributed circumferentially on the side of the second gear 3 away from the first gear 2. The depth of the third weight-reducing grooves is 80-90% of the thickness of the second gear. By setting the weight-reducing grooves, the weight of the gear is reduced, materials are saved, and inertia is reduced, thereby improving the gear's response speed and transmission efficiency.

[0030] During the assembly process, the first and second pins are first mounted on the shaft. The first gear is then fixed to the corresponding position on the shaft using injection molding. Finally, the limiting notch on the second gear is aligned with the second pin and fitted onto the shaft to complete the assembly.

[0031] The above-described embodiments are preferred embodiments of the present utility model and are only used to facilitate the illustration of the present utility model. They are not intended to limit the present utility model in any way. Any person skilled in the art who makes partial modifications or alterations to the technical content disclosed in the present utility model without departing from the scope of the technical features of the present utility model shall still fall within the scope of the technical features of the present utility model.

Claims

1. A double gear, comprising a rotating shaft (1), characterized in that, A first gear (2) is connected to the shaft (1), and a second gear (3) is detachably connected to the shaft (1) on one side of the first gear (2). Splines (4) are provided on the surfaces of the shaft (1) where it connects to the first gear (2) and the second gear (3). A limiting structure (5) is provided between the shaft (1) and the second gear (3) to prevent the second gear (3) from rotating.

2. A double gear according to claim 1, characterized in that, The diameter of the connection between the rotating shaft (1) and the first gear (2) is 0.4-0.6 mm smaller than the diameter of the rotating shaft (1). The first gear (2) is injection molded on the rotating shaft (1). A limiting platform (6) is provided at the connection between the rotating shaft (1) and the first gear (2). A limiting protrusion (7) adapted to the limiting platform (6) is provided on the inner ring of the first gear (2).

3. A double gear according to claim 2, characterized in that, The limiting platform (6) is provided with a first pin (8) perpendicular to the rotating shaft (1), and the first pin (8) cooperates with the first gear (2).

4. A double gear according to claim 1, characterized in that, The limiting structure (5) includes a second pin (5a) disposed on the rotating shaft (1) and a limiting notch (5b) on the second gear (3) that cooperates with the second pin (5a).

5. A double gear according to claim 1, characterized in that, The diameter of the first gear (2) is larger than that of the second gear (3).

6. A double gear according to claim 1, characterized in that, The first gear (2) has a plurality of first weight-reducing grooves (9) evenly distributed along the circumference on its side, and a second weight-reducing groove (10) that is offset from the first weight-reducing grooves (9) is provided on the other side.

7. A double gear according to claim 1, characterized in that, The second gear (3) has several third weight-reducing grooves (11) evenly distributed along the circumferential direction on the side away from the first gear (2).

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