Novel flexible planet carrier

Abstract

The invention belongs to the technical field of planetary transmission, and discloses a novel flexible planet carrier which comprises a flange shaft, flexible shafts and a shaft sleeve, the multiple flexible shafts are annularly and evenly installed on a flange plate of the flange shaft, a step is machined at the end, away from the flange shaft, of each flexible shaft, and a V-shaped receding groove is machined in the outer wall, close to the step, of each flexible shaft; the shaft sleeve is arranged on the outer side of the avoiding groove of the flexible shaft in a sleeving mode, and a supporting ring in interference fit with the step of the flexible shaft is machined at one end of the shaft sleeve. The flexible shaft is arranged, the position of the planet gear between the sun gear and the gear ring is adjusted through the elastic deformation characteristic of the flexible shaft, then the inter-tooth load of the planet gear is adjusted to be uniform, meanwhile, the shaft sleeve can reduce the deformation force of the end of the flexible shaft, and the V-shaped receding groove in the flexible shaft and the shaft sleeve can form deformation compensation; and the axis deflection of the planet gear can be effectively reduced, the uniform tooth load of the planet gear is ensured, and the stable operation of a planetary gear train is further ensured.

Description

Technical Field

[0001] The invention belongs to the technical field of planetary transmission, and particularly relates to a novel flexible planetary carrier. Background Art

[0002] A planetary gear train is a transmission system with high loads and large transmission ratios, and is widely used in various mechanical transmission systems for speed increase, speed reduction, and speed change. The planetary gear is located between the sun gear and the ring gear, and is an intermediate component for speed increase and speed reduction, transmitting power and changing the form of motion. Existing planetary gears are mainly double-walled planetary gear carriers. However, the new double-walled carrier is large and heavy. To solve the problems of the existing double-walled planetary gear, a single-walled planetary gear carrier is used. However, due to the manufacturing and assembly limitations of the principle of gear meshing, the single-walled planetary gear carrier is prone to cantilever beam deformation, resulting in axis offset. This leads to uneven load distribution between the sun gear and the ring gear, which can cause damage to the planetary gear train in severe cases. Based on this, the use of flexible pins to improve load distribution and achieve balanced load distribution has gradually been used. Although flexible pins can alleviate the load distribution problem, they can also easily cause the planetary gear to deflect, resulting in uneven distribution of tooth stress during gear meshing, which in turn limits the meshing performance and service life of the planetary gear. Summary of the Invention

[0003] The purpose of the present invention is to solve the problems in the background technology and provide a new type of flexible planetary carrier. The planetary carrier uses a flexible shaft and a sleeve to automatically adjust the radial load and axial load of the planetary gear, effectively reducing the axial deflection of the planetary gear, and can evenly load the inter-tooth load and the tooth-direction load.

[0004] The purpose of the present invention is achieved through the following technical solutions:

[0005] A new type of flexible planetary carrier includes a flange shaft, a flexible shaft and a sleeve. Multiple flexible shafts are evenly installed in a ring shape on the flange plate of the flange shaft. A step is processed on the end of each flexible shaft away from the flange shaft, and a V-shaped avoidance groove is processed on the outer wall of the flexible shaft close to the step. The sleeve is mounted on the outside of the avoidance groove of the flexible shaft, and a support ring with an interference fit with the step of the flexible shaft is processed on one end of the sleeve.

[0006] The shaft sleeve is a rigid part or a flexible part.

[0007] The novel flexible planetary carrier provided by the present invention has the following beneficial effects: by setting a flexible shaft, the elastic deformation characteristics of the flexible shaft are utilized to adjust the position of the planetary gear between the sun gear and the ring gear, thereby adjusting the load distribution between the teeth of the planetary gear. At the same time, the shaft sleeve can reduce the deformation force at the end of the flexible shaft. The V-shaped avoidance groove on the flexible shaft and the shaft sleeve can form deformation compensation, which can effectively reduce the axial deflection of the planetary gear, ensure the tooth load distribution of the planetary gear, and thus ensure the smooth operation of the planetary gear system. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0009] Figure 1 A schematic structural diagram of an embodiment of the present invention.

[0010] Figure 2 An axial cross-sectional view provided for an embodiment of the present invention.

[0011] Figure 3 This is a schematic diagram of the installation of the flexible shaft and sleeve provided in an embodiment of the present invention.

[0012] Figure 4 This is an exploded view of the flexible shaft and sleeve provided in an embodiment of the present invention.

[0013] Figure 5 A schematic diagram of the structure of the embodiment of the present invention when in use.

[0014] Figure 6 A schematic diagram of the forces acting on the flexible shaft and sleeve provided in an embodiment of the present invention.

[0015] Markings in the figure: 1. Flange shaft; 2. Flexible shaft; 3. Bushing; 4. Bearing; 5. Planetary gear; 6. Step; 7. Adjustment groove; 8. Support ring. DETAILED DESCRIPTION

[0016] like Figures 1 to 4As shown, the new flexible planetary carrier provided by this embodiment includes a flange shaft 1, a flexible shaft 2, a sleeve 3, a bearing 4 and a planetary gear 5. A plurality of flexible shafts 2 are evenly installed on the flange shaft 1 in a ring shape. One end of each flexible shaft 2 is interference fit with the flange of the flange shaft 1, and the other end is processed with a step 6. A V-shaped adjustment groove 7 is processed on the annular surface of the flexible shaft 2 near the step 6. The flexible shaft 2 can automatically adjust the radial load by using its own deformation compensation, so that the planetary gear 5 can achieve load balance between the teeth between the sun gear and the ring gear; the sleeve 3 is fitted on the outside of the adjustment groove 7 of the flexible shaft 2, and one end of the sleeve 3 is processed with a support ring 8 that is interference fit with the step 6. The support ring 8 serves as the sleeve 3 and the planetary gear. The component connected to the flexible shaft 2, the axial section of the sleeve 3 is symmetrical L-shaped, the sleeve 3 is a rigid part or a flexible part, and the planetary gear 5 is rotatably mounted on the outside of the sleeve 3 through the bearing 4. When the flexible shaft 2 between the step 6 and the adjustment groove 7 supports the sleeve 3, the sleeve 3 can provide a force in the opposite direction of the deformation of the flexible shaft 2 by utilizing the avoidance space of the adjustment groove 7, thereby adjusting the uneven tooth load caused by the deflection of the axis of the planetary gear 5 caused by the offset of the end of the flexible shaft 2. Through the deflection between the sleeve 3 and the adjustment groove 7 on the flexible shaft 2, the radial load of the planetary gear 5 can be automatically adjusted, which effectively reduces the axis deflection of the planetary gear 5, thereby achieving uniform tooth load.

[0017] like Figures 1 to 6 As shown, the flexible shaft 2 is installed on the flange shaft 1. Due to the elastic deformation of the flexible shaft 2, it will appear as follows Figure 6 The bending shape of the flexible shaft 2 will cause the planetary gear 5 to deflect, causing the planetary gear 5 to cause uneven distribution of tooth load during the meshing process. Therefore, the end of the flexible shaft 2 needs to be corrected. Since the cross-sectional profile of the sleeve 3 is L-shaped, the open end of the sleeve 3 will produce downward deformation, and the open end of the sleeve 3 faces the flexible shaft 2. Therefore, if Figure 6 As shown, the sleeve 3 can correct the bending direction of the flexible shaft 2, and the adjustment groove 7 on the flexible shaft 2 also provides an avoidance space for the correction of the sleeve 3, thereby solving the problems of uneven load distribution and deflection of the planetary gear 5.

[0018] The above description is only a preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any modification and replacement based on the technical solution and inventive concept provided by the present invention should be covered by the protection scope of the present invention.

Claims

1. A new type of flexible planetary carrier, characterized by: The invention comprises a flange shaft (1), a flexible shaft (2) and a sleeve (3), wherein a plurality of flexible shafts (2) are evenly mounted on the flange of the flange shaft (1) in a ring shape, a step (6) is processed on one end of each flexible shaft (2) away from the flange shaft (1), a V-shaped avoidance groove (7) is processed on the outer wall of the flexible shaft near the step (6), the sleeve (3) is sleeved on the outside of the avoidance groove (7) of the flexible shaft (2), and a support ring (8) is processed on one end of the sleeve (3) to be interference-fitted with the step (6) of the flexible shaft (2).

2. The novel flexible planetary carrier according to claim 1 is characterized in that: The shaft sleeve (3) is a rigid part or a flexible part.

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