A planetary gearbox

Abstract

This utility model discloses a planetary gearbox, belonging to the technical field of gearboxes. It includes an input planetary mechanism located at one end of a housing, and an output planetary mechanism located at the other end of the housing. The input planetary mechanism includes a planet carrier with a sun gear in the center. Half-holes are formed on the edge of the inner hole of the planet carrier and the outer circumference of the sun gear, with a drive pin installed in each half-hole. The output planetary mechanism includes a gearbox output shaft connected to an output planetary carrier. Half-holes are machined on the outer circumference of the output shaft and the inner hole of the output planetary carrier, with a drive pin installed between the two half-holes. This utility model transmits torque via drive pins, preventing slippage between the sun gear and the planet carrier, and can transmit large torques.

Description

Technical Field

[0001] This utility model relates to a planetary gearbox and belongs to the field of gearbox technology. Background Technology

[0002] With market demand, planetary gearboxes require more compact structures and higher torque transmission capabilities. For miniature gearboxes, the planetary carrier and sun gear are typically fixed using interference fits or welding. However, this structure is prone to slippage and gearbox failure when transmitting high torque. Utility Model Content

[0003] The purpose of this utility model is to overcome the shortcomings of the existing technology where the planetary gearbox and sun gear are assembled by interference fit, which is prone to slippage and gearbox failure when transmitting large torque. The present invention provides a planetary gearbox structure that realizes ultra-large torque transmission. To achieve the above objectives / to solve the above technical problems, this utility model adopts the following technical solution: A planetary gearbox includes an input planetary mechanism located at one end of a housing, and an output planetary mechanism located at the other end of the housing; The input planetary mechanism includes a planet carrier, a sun gear is provided in the middle of the planet carrier, and multiple half holes are opened on the edge of the inner hole in the middle of the planet carrier and the outer circle of the sun gear. A transmission pin is installed in every two half holes. The output planetary mechanism includes a gearbox output shaft, which is connected to an output planetary carrier. Half holes are machined into the outer circle of the gearbox output shaft and the inner hole of the output planetary carrier, and a transmission pin is installed between the two half holes.

[0004] Optionally, a planetary gear A is provided on the side of the output planetary carrier away from the output shaft of the gearbox, and a planetary carrier reinforcing plate is provided on the outer side of the planetary gear A. The planetary gear A and the planetary carrier reinforcing plate are connected to the output planetary carrier through a planetary gear pin A.

[0005] Optionally, a planetary gear B is provided on the outer side of the planet carrier, and the planetary gear B is connected to the planet carrier through a planetary gear pin B.

[0006] Optionally, one end of the housing is provided with an end cap, and a gasket is provided between the end cap and the planetary gear B.

[0007] Optionally, the gearbox output shaft is connected to the housing via a rotating component.

[0008] Optionally, the rotating component includes a bearing sleeved on the output shaft of the gearbox, the bearing being disposed within a bearing housing.

[0009] Optionally, the output shaft of the gearbox is provided with a stop ring to prevent the bearing from sliding.

[0010] Optionally, the input planetary mechanism meshes with the motor gear, and the input planetary mechanism is connected to the output planetary mechanism via a sun gear drive.

[0011] Compared with the prior art, the beneficial effects achieved by this utility model are as follows: This invention features a semi-circular opening on the outer diameter of the planet carrier and the sun gear, which mates with the inner hole of the planet carrier. A transmission pin is pressed into this semi-circular opening to transmit torque, preventing slippage between the sun gear and the planet carrier and enabling the transmission of large torques. Attached Figure Description

[0012] Figure 1 The diagram shown is a schematic representation of the overall structure of the planetary gearbox of this utility model. Figure 2 The figure shown is an exploded view of the planetary gearbox of this utility model; Figure 3 The diagram shown is a schematic of the input planetary mechanism of the planetary gearbox of this utility model; Figure 4 The figure shown is an exploded view of the input planetary mechanism of the planetary gearbox of this utility model; Figure 5 The diagram shown is a schematic of the output planetary mechanism of the planetary gearbox of this utility model; Figure 6 The figure shown is an exploded view of the output planetary mechanism of the planetary gearbox of this utility model; Figure 7 The diagram shown is a schematic of the output shaft of the planetary gearbox of this utility model. Figure 8 The figure shown is an exploded view of the output shaft of the planetary gearbox of this utility model; Figure 9 The diagram shown is a schematic diagram of the planetary carrier and sun gear with multiple half holes of this utility model.

[0013] In the diagram: 1. Gearbox output shaft; 2. Retaining ring; 3. Bearing; 4. Housing; 5. Planetary gear pin A; 6. Planetary gear A; 7. Planetary carrier; 8. Planetary gear pin B; 9. Planetary gear B; 10. Bearing housing; 11. Sun gear; 12. Planetary carrier reinforcing plate; 13. Shim; 14. End cover; 15. Transmission pin; 16. Motor gear; 17. Output shaft half-hole; 18. Planetary carrier half-hole. Detailed Implementation

[0014] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0015] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0016] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0017] like Figures 1-8 As shown, a planetary gearbox is disclosed, including an input planetary mechanism located at one end of the housing 4, and an output planetary mechanism located at the other end of the housing; The input planetary mechanism includes a planet carrier 7, a sun gear 11 is provided in the middle of the planet carrier 7, and multiple half holes are provided on the edge of the inner hole in the middle of the planet carrier 7 and the outer circle of the sun gear 11. A transmission pin 15 is installed in every two half holes. The output planetary mechanism includes a gearbox output shaft 1, which is connected to an output planetary carrier. The outer circle of the gearbox output shaft 1 and the inner hole of the output planetary carrier are machined with an output shaft half hole 17 and a planetary carrier half hole 18. A transmission pin is installed between the two half holes.

[0018] By pressing a drive pin into a semi-hole, the torque is transmitted through the drive pin, avoiding slippage between the sun gear and the planetary carrier, and enabling the transmission of large torques.

[0019] In the specific implementation process of this embodiment, such as Figure 3 Figure 4As shown, the output planetary carrier has a planetary gear A6 on the side away from the output shaft 1 of the gearbox. The outer side of the planetary gear A has a planetary carrier reinforcing plate 12. The planetary gear A and the planetary carrier reinforcing plate 12 are connected to the output planetary carrier through planetary gear pins A5. During assembly, the output planetary carrier is assembled with planetary gear pins A5 first, then planetary gear A6 is assembled, and finally a planetary carrier reinforcing plate 12 is pressed in.

[0020] When transmitting heavy loads, the planetary carrier reinforcement plate can effectively protect the planetary gear pins from deformation, greatly improving the rigidity of the planetary carrier 7 and enabling it to transmit greater torque.

[0021] In this embodiment, a planetary gear B9 is provided on the outer side of the planetary carrier 7. The planetary gear B9 is connected to the planetary carrier 7 through a planetary gear pin B8. The purpose of this arrangement is to allow the planetary gear to rotate around the planetary gear pin on the planetary carrier.

[0022] In this embodiment, one end of the outer casing 4 is provided with an end cap 14, and a gasket 13 is provided between the end cap 14 and the planetary gear B9. The output shaft 1 of the gearbox is connected to the outer casing 4 through a rotating component. The gasket 13 can prevent the planetary gear B9 and the end cap 14 from directly contacting each other, and has the function of reducing noise.

[0023] In this embodiment, the rotating component includes a bearing 3 sleeved on the output shaft 1 of the gearbox. The bearing 3 is located inside the bearing seat 10, so that the output shaft of the gearbox rotates in the inner hole of the bearing.

[0024] In the specific implementation process of this embodiment, such as Figure 1 As shown, the output shaft 1 of the gearbox is provided with a stop ring 3 to prevent the bearing 3 from sliding; it can fix the output shaft of the gearbox and prevent axial movement.

[0025] In the specific implementation process of this embodiment, such as Figures 1-2 As shown, the input planetary mechanism meshes with the motor gear 16, and the input planetary mechanism and the output planetary mechanism are connected by a sun gear 11.

[0026] Let the motor output speed be N0; the number of teeth on the motor gear be Z1; the number of teeth on planetary gear B9 be Z2; the number of teeth on the outer casing 4 be Z3; the number of teeth on the sun gear 11 be Z4; the number of teeth on planetary gear A6 be Z5; the output speed of planet carrier 7 be N1; and the output shaft speed of the gearbox be N2. The motor gear is installed on the motor. The rotation of the motor drives the motor gear to rotate, thereby the motor gear meshes with the planetary gear B9, and the planetary gear B9 meshes with the outer casing 4, thus forcing the planet carrier 7 to rotate at a speed of N2, where N2 = N0 / (Z3 / Z1+1). The rotation of the planet carrier 7 drives the sun gear 11 to rotate at a speed of N2. The sun gear 11 meshes with the planet gear A6, and the planet gear A6 meshes with the housing 4, forcing the output shaft 1 of the gearbox to rotate at a speed of N2, where N2 = N1 / (Z3 / Z4+1). Therefore, N2 = N0 / ((Z3 / Z1+1)*(Z3 / Z4+1)). The overall gearbox transmission ratio is: N0 / N2 = (Z3 / Z1+1)*(Z3 / Z4+1).

[0027] like Figure 9 As shown, depending on the load, multiple half-holes can be opened on both the inner edge of the planet carrier 7 and the outer circle of the sun gear 11, and then the number of pins can be increased. For a normal load, one pin can be used, and for a large load, the number of transmission pins can be increased.

[0028] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A planetary gearbox, characterized in that, It includes an input planetary mechanism located at one end of the housing (4), and an output planetary mechanism located at the other end of the housing; The input planetary mechanism includes a planet carrier (7), a sun gear (11) is provided in the middle of the planet carrier (7), and multiple half holes are provided on the edge of the inner hole in the middle of the planet carrier (7) and the outer circle of the sun gear (11), and a transmission pin (15) is installed in every two half holes. The output planetary mechanism includes a gearbox output shaft (1), which is connected to an output planetary carrier. The outer circle of the gearbox output shaft (1) and the inner hole of the output planetary carrier are machined with half holes, and a transmission pin is installed between the two half holes.

2. The planetary gearbox according to claim 1, characterized in that, The output planetary carrier is provided with a planetary gear A (6) on the side away from the output shaft (1) of the gearbox. The outer side of the planetary gear A is provided with a planetary carrier reinforcing plate (12). The planetary gear A and the planetary carrier reinforcing plate (12) are connected to the output planetary carrier through a planetary gear pin A (5).

3. The planetary gearbox according to claim 1, characterized in that, The planetary carrier (7) is provided with a planetary wheel B (9) on its outer side, and the planetary wheel B (9) is connected to the planetary carrier (7) through a planetary wheel pin B (8).

4. The planetary gearbox according to claim 3, characterized in that, The outer shell (4) has an end cap (14) at one end, and a gasket (13) is provided between the end cap (14) and the planetary gear B (9).

5. The planetary gearbox according to claim 1, characterized in that, The output shaft (1) of the gearbox is connected to the housing (4) via a rotating component.

6. The planetary gearbox according to claim 5, characterized in that, The rotating component includes a bearing (3) sleeved on the output shaft (1) of the gearbox, and the bearing (3) is located in the bearing housing (10).

7. The planetary gearbox according to claim 6, characterized in that, The output shaft (1) of the gearbox is provided with a stop ring (2) to prevent the bearing (3) from sliding.

8. The planetary gearbox according to claim 1, characterized in that, The input planetary mechanism meshes with the motor gear (16), and the input planetary mechanism and the output planetary mechanism are connected by a sun gear (11).

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