Segmented combined type planetary gear transmission device

Abstract

The segmented combined type planetary gear transmission device comprises an inner gear ring, the inner gear ring is divided into a front segment and a rear segment, an isolation groove is formed between the front segment and the rear segment, and a front retainer used for bearing a front planetary gear set and a rear planetary gear set is arranged in the inner gear ring; a front planet gear shaft set is arranged on the upper surface of the front holder, a front planet gear set is correspondingly arranged on the front planet gear shaft set, and a rear planet gear shaft set is arranged on the lower surface of the front holder. According to the planetary transmission device, the planetary gear sets are reasonably arranged on the front retainer and the rear retainer, so that the radial size of the whole transmission device can be reduced on the premise that the performance is not sacrificed, two sections of planetary transmission structures are combined to output larger power together, the movement stability of a transmission system is improved through simultaneous meshing of multiple branches, and the strength and durability of the gear are greatly improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of planetary gear transmission, in particular to a segmented composite planetary gear transmission device. BACKGROUND

[0002] In the field of modern mechanical transmission, planetary gear transmission devices are widely used due to their compact design, high efficiency and large torque transmission capacity. However, in practical applications, traditional planetary gear transmission devices face some challenges and limitations. With the development of mechanical equipment towards miniaturization and lightweight, there are increasingly stringent requirements for the radial size of the transmission device. The traditional design of planetary gear transmission often has difficulty in further reducing the radial size while ensuring sufficient carrying capacity. This not only limits the overall layout optimization of the equipment, but also may affect the design and integration of other key components. Especially in extremely limited application scenarios such as aerospace and precision instrument manufacturing, how to effectively reduce the radial size of the planetary gear transmission device without sacrificing performance; in addition to size constraints, insufficient gear strength is also an important problem faced by planetary gear transmission devices. In high-load working environments, especially when large torques need to be transmitted or impact loads need to be borne, the gears are prone to accelerated wear, tooth surface pitting and even fracture, which seriously affects the reliability and service life of the transmission system. SUMMARY

[0003] The technical problem to be solved by the present application is to overcome the existing defects and provide a segmented composite planetary gear transmission device that can effectively solve the problems in the background art.

[0004] To achieve the above-mentioned purpose, the present application provides the following technical solution: a segmented composite planetary gear transmission device, comprising an inner ring gear, the inside of the inner ring gear is provided with a front retainer for carrying a front planetary gear set and a rear planetary gear set, the upper surface of the front retainer is provided with a front planetary gear shaft set, the front planetary gear shaft set is correspondingly provided with a front planetary gear set, the lower surface of the front retainer is provided with a rear planetary gear shaft set, the rear planetary gear shaft set corresponds to a through hole provided on a rear retainer at one end of the inner ring gear, and the outer side of the rear planetary gear shaft set is sleeved with a rear planetary gear set, the front planetary gear set and the rear planetary gear set are engaged with the inner ring gear, a central shaft is coaxially arranged with the inner ring gear, the front retainer and the rear retainer, the central shaft is provided with a front sun gear and a rear sun gear, and the front sun gear and the rear sun gear are engaged with the front planetary gear set and the rear planetary gear set, respectively.

[0005] As a preferred technical solution of the present application, the outer side of the front planetary gear shaft set and the rear planetary gear shaft set is sleeved with a needle bearing, and the needle bearing is coaxially arranged with the front planetary gear set and the rear planetary gear set.

[0006] As a preferred technical scheme of the present application, six mounting holes are uniformly distributed on the circumference of the front holder, the number of the front planetary gear shaft group and the rear planetary gear shaft group is three respectively, and they are located on the lower and upper axial end faces of the front holder respectively, and the front planetary gear shaft group and the rear planetary gear shaft group are arranged in staggered positions.

[0007] As a preferred technical scheme of the present application, a bearing is arranged at the center position of the front holder, and the bearing is coaxially arranged with the central shaft.

[0008] As a preferred technical scheme of the present application, the front sun gear is integrally made with the central shaft, and the rear sun gear is installed on the central shaft through a key groove.

[0009] As a preferred technical scheme of the present application, the inner ring gear is divided into a front inner tooth and a rear inner tooth, and a separation groove is arranged between the front inner tooth and the rear inner tooth, and the two are correspondingly arranged with the front planetary gear group and the rear planetary gear group.

[0010] Compared with the prior art, the present application realizes a compact structure, enhances the carrying capacity, transmission efficiency and running stability of the system, and the segmented inner ring gear and the planetary gear groups arranged on the front and rear holders make the entire transmission device be able to reduce the radial size without sacrificing performance, the two-stage planetary transmission structure combination outputs greater power, the multiple branches simultaneously meshing improves the stability of the motion of the transmission system, greatly improves the strength and durability of the gear, and makes the transmission device be able to withstand higher torque and impact load, prolonging the service life. BRIEF DESCRIPTION OF DRAWINGS

[0011] Figure 1 It is an explosion structure schematic diagram of the present application;

[0012] Figure 2 It is a cross-sectional structure schematic diagram of the present application;

[0013] Figure 3 It is a front holder structure schematic diagram;

[0014] Figure 4 It is an assembly structure schematic diagram of the present application.

[0015] In the figure: 1 front sun gear, 2 bearing, 3 needle bearing, 4 front planetary gear shaft group, 5 front planetary gear group, 6 inner ring gear, 7 front holder, 8 rear sun gear, 9 rear holder, 10 rear planetary gear shaft group, 11 rear planetary gear group. DETAILED DESCRIPTION

[0016] The technical solutions in the embodiments of the present application will be clearly and completely described with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. All other embodiments obtained by a person of ordinary skill in the art without creative effort on the basis of the embodiments in the present application (for the convenience of description and understanding, the embodiments are described below Figure 2 in the order of top, bottom, left, right, front and back). All other embodiments obtained by a person of ordinary skill in the art without creative effort belong to the scope of protection of the present application.

[0017] Please refer to Figures 1-4 , the present application provides a technical solution: a segmented composite planetary gear transmission device, comprising an inner ring gear 6, the inside of the inner ring gear 6 is provided with a front retainer 7 for bearing a front planetary gear set 5 and a rear planetary gear set 11.

[0018] The inner ring gear 6 is a fixed ring structure in the planetary gear transmission system, and has a tooth pattern inside. The inner ring gear 6 provides a stable basic framework, so that the planetary gear set rotates inside it and transmits power out or input.

[0019] The front retainer 7 is arranged inside the inner ring gear 6 and bears the position of the fixed front planetary gear set 5 and the rear planetary gear set 11, ensuring that they can accurately move along the tooth rail of the inner ring gear 6 during operation.

[0020] The upper surface of the front retainer 7 is provided with a front planetary gear shaft set 4, the front planetary gear shaft set 4 is correspondingly provided with a front planetary gear set 5, the lower surface of the front retainer 7 is provided with a rear planetary gear shaft set 10, the rear planetary gear shaft set 10 corresponds to the through hole on the rear retainer 9 arranged at one end of the inner ring gear 6, and the outer side of the rear planetary gear shaft set 10 is sleeved with a rear planetary gear set 11.

[0021] The front retainer 7 is used to bear and position the front planetary gear shaft set 4 and the rear planetary gear shaft set 10.

[0022] The front planetary gear shaft set 4 is located on the upper surface of the front retainer 7, is an intermediate medium connecting the front sun gear 1 and the front planetary gear set 5, and provides a mounting position for the front planetary gear set 5, ensuring that it can rotate freely around the center axis, while accurately transmitting power from the front sun gear 1 to the front planetary gear set 5.

[0023] The rear planetary gear shaft set 10 is below the front retainer 7 and corresponds to the through hole on the rear retainer 9, improving the structural strength and providing support and rotation axis for the rear planetary gear set 11.

[0024] The front planetary gear set 5 and the rear planetary gear set 11 are both engaged with the inner ring gear 6, and the center shaft is coaxial with the inner ring gear 6, the front retainer 7 and the rear retainer 9, and the front sun gear 1 and the rear sun gear 8 are arranged on the center shaft, and the front sun gear 1 and the rear sun gear 8 are respectively engaged with the front planetary gear set 5 and the rear planetary gear set 11.

[0025] The front planetary gear set 5 and the rear planetary gear set 11 are both engaged with the inner ring gear 6. The planetary gear set rotates around its own axis while also running along the internal track of the inner ring gear 6, thereby achieving power transmission and conversion, and can effectively convert the power from the sun gear into the required output speed and torque.

[0026] The center shaft is the source of input power and the basic support of the entire planetary gear transmission system. Through the front sun gear 1 and the rear sun gear 8 on the center shaft, power is distributed to the front planetary gear set 5 and the rear planetary gear set 11, thereby completing the entire power transmission process.

[0027] The front sun gear 1 and the rear sun gear 8 are respectively engaged with the front planetary gear set 5 and the rear planetary gear set 11, and are the starting point of the entire power transmission chain.

[0028] Further, the outer side of the front planetary gear shaft set 4 and the rear planetary gear shaft set 10 is sleeved with a needle bearing 3, and the needle bearing 3 is coaxial with the front planetary gear set 5 and the rear planetary gear set 11.

[0029] The needle bearing 3 is sleeved on the outer side of the front planetary gear shaft set 4 and the rear planetary gear shaft set 10, which reduces friction and allows the planetary gear set to operate with low resistance even at high speed. This improves transmission efficiency and prolongs the service life of the equipment.

[0030] Further, the front retainer 7 is circumferentially distributed with six mounting holes, the number of the front planetary gear shaft set 4 and the rear planetary gear shaft set 10 is three respectively, and they are located at the lower and upper axial end faces of the front retainer 7 respectively, and the front planetary gear shaft set 4 and the rear planetary gear shaft set 10 are arranged in a staggered manner.

[0031] The front retainer 7 is circumferentially distributed with six mounting holes, which provides accurate mounting positions for the front planetary gear shaft set 4 and the rear planetary gear shaft set 10. This helps to balance the load of the entire system and reduce vibration and noise during operation.

[0032] The mounting holes are arranged in a staggered manner. This optimizes space utilization while avoiding interference between the front and rear planetary gear sets. Through staggered arrangement, load can be better distributed, wear can be reduced, and overall efficiency can be improved.

[0033] Further, the center position of the front retainer 7 is provided with a bearing 2, and the bearing 2 is coaxial with the center shaft.

[0034] The bearing 2 is located at the center of the front holder 7 and is coaxial with the central shaft, and the bearing 2 provides low-friction support to ensure that the central shaft can run stably and smoothly at high speed. Energy loss is reduced, and the service life of the central shaft is improved.

[0035] Further, the front sun gear 1 is integrally made with the central shaft, and the rear sun gear 8 is installed on the central shaft through a key groove.

[0036] Further, the inner ring 6 is divided into front and rear inner teeth, and an isolation groove is provided between the front and rear inner teeth, which are respectively arranged corresponding to the front and rear planetary gear sets 5 and 11.

[0037] The inner ring 6 adopts a segmented structure, allowing independent but coordinated operation of different parts of the planetary gear set, improving the flexibility and adaptability of the system.

[0038] The isolation groove provided between the front and rear inner teeth not only plays a physical separation role, reducing mutual interference between the two regions, but also helps to reduce friction and heat accumulation. In addition, the isolation groove enhances the overall rigidity and durability of the inner ring 6, helping to withstand greater torque and load.

[0039] In use: insert the mounting holes on the front holder 7 into the corresponding front and rear planetary gear shaft sets 4 and 10, install the needle bearings 3 on the front and rear planetary gear shaft sets 4 and 10, and at the same time install the central shaft in the bearing 2 at the center of the front holder 7. At this time, the front and rear planetary gear sets 5 and 11 are sleeved outside the front and rear planetary gear shaft sets 4 and 10, and the front and rear sun gears 1 and 8 on the central shaft are adjusted to be in meshing state with the front and rear planetary gear shaft sets 4 and 10. At this time, the front holder 7 and each part mentioned above are placed in the inner ring 6, and the front and rear planetary gear sets 5 and 11 are meshed with the front and rear inner teeth in the inner ring 6. The rear planetary gear shaft set 10 is inserted into the hole position on the rear holder 9, and the installation is completed. When the central shaft drives the front and rear sun gears 1 and 8 to rotate, the front and rear sun gears 1 and 8 will drive the front and rear planetary gear sets 5 and 11 to rotate, and the front and rear planetary gear sets 5 and 11 will drive the front and rear holders 7 and 9 to rotate synchronously when rotating, outputting power. The two-stage planetary transmission structure combination outputs more power, and the simultaneous engagement of multiple branches improves the stability of the motion of the transmission system.

[0040] While embodiments of the application have been shown and described, it is to be understood that the embodiments described are merely exemplary and that changes can be made in detail without departing from the principles and spirit of the application. The scope of the application is therefore defined by the appended claims and their equivalents.

Claims

1. A segmented compound planetary gear comprising an inner ring gear (6), characterized in that: The inner gear ring (6) is internally provided with a front retainer (7) for bearing a front planetary gear set (5) and a rear planetary gear set (11), the upper surface of the front retainer (7) is provided with a front planetary gear shaft set (4), the front planetary gear shaft set (4) is correspondingly provided with the front planetary gear set (5), the lower surface of the front retainer (7) is provided with a rear planetary gear shaft set (10), the rear planetary gear shaft set (10) corresponds to through holes provided on the rear retainer (9) at one end of the inner gear ring (6), and the outer side of the rear planetary gear shaft set (10) is sleeved with the rear planetary gear set (11), the front planetary gear set (5) and the rear planetary gear set (11) are engaged with the inner gear ring (6), the central shaft is coaxially arranged with the inner gear ring (6), the front retainer (7) and the rear retainer (9), the central shaft is provided with a front sun gear (1) and a rear sun gear (8), and the front sun gear (1) and the rear sun gear (8) are engaged with the front planetary gear set (5) and the rear planetary gear set (11) respectively.

2. A segmented composite planetary gear arrangement according to claim 1, characterised in that: The outer side of the front planetary gear shaft set (4) and the rear planetary gear shaft set (10) is sleeved with a needle bearing (3), and the needle bearing (3) is coaxially arranged with the front planetary gear set (5) and the rear planetary gear set (11).

3. A segmented composite planetary gear arrangement according to claim 1, wherein: The front retainer (7) is circumferentially provided with six mounting holes, the number of the front planetary gear shaft set (4) and the rear planetary gear shaft set (10) is three respectively, and they are located at the lower and upper axial end surfaces of the front retainer (7) respectively, and the front planetary gear shaft set (4) and the rear planetary gear shaft set (10) are arranged in a staggered manner.

4. A segmented composite planetary gear arrangement according to claim 3, wherein: The central position of the front retainer (7) is provided with a bearing (2), and the bearing (2) is coaxially arranged with the central shaft.

5. A segmented composite planetary gear arrangement according to claim 1, characterised in that: The front sun gear (1) is integrally made with the central shaft, and the rear sun gear (8) is installed on the central shaft through a key groove.

6. A segmented composite planetary gear arrangement according to claim 1, characterised in that: The inner gear ring (6) is divided into a front inner gear and a rear inner gear, and an isolation groove is arranged between the front inner gear and the rear inner gear, and the two are correspondingly provided with the front planetary gear set (5) and the rear planetary gear set (11) respectively.

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