Speed reducer capable of outputting large torque

Abstract

The utility model discloses a speed reducer outputting large torque, which comprises a multi-stage planetary gear speed reducing assembly and an output shaft, the multi-stage planetary gear speed reducing assembly comprises an inner gear ring, a partition plate fixed at a first end of an inner hole of the inner gear ring, and three stages of planetary gear sets arranged side by side along the axial direction of the inner gear ring, wherein the first-stage planetary gear set is meshed with the inner gear ring and the starting gear, the third-stage planetary gear set is fixed to the output shaft, the partition plate comprises a metal core body and a rubber coating layer coating the metal core body, and a first axial positioning step matched with the partition plate in a positioning mode is arranged at the first end of an inner hole of the inner gear ring. The partition plate is in interference fit with the first end of the inner hole of the inner gear ring through the rubber coating layer. The utility model can realize large torque output, is compact in structure, and saves installation space.

Description

Technical Field

[0001] The utility model relates to a reducer. Background Art

[0002] Tracking photovoltaic mounts work by automatically adjusting the solar cells' angle to the optimal sunlight exposure, thereby increasing the power generation of the photovoltaic power station. The drive system, which includes a motor, reducer, and transmission mechanism, is used to drive the mount's rotation.

[0003] The Chinese utility model patent, with authorization publication number CN 206608511U, discloses a photovoltaic tracking reducer, comprising an input end cap, a stepper motor fixed to the input end cap, the stepper motor connected to an input gear shaft, the input gear shaft meshing with planetary gears, the planetary gears connected to an output gear shaft via a planetary shaft, the planetary gears mounted on a planetary carrier, meshing with an intermediate sun gear, which is located at the front end of the input gear shaft, the planetary gears meshing with an internal ring gear, and an output end cap mounted on the outside of the output gear shaft. The problem with this invention is that:

[0004] 1. The input end cover and the output end cover occupy a large axial length, resulting in a large space occupation;

[0005] 2. The output torque is small, which makes it difficult to adapt to the large torque requirements of the new tracking photovoltaic bracket. Utility Model Content

[0006] The technical problem to be solved by the utility model is to provide a speed reducer which outputs large torque, has a compact structure, saves space, and realizes large torque output.

[0007] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0008] A reducer that outputs large torque includes a multi-stage planetary gear reduction assembly and an output shaft. The multi-stage planetary gear reduction assembly includes an inner ring gear, a partition fixed to the first end of the inner hole of the inner ring gear, and a three-stage planetary gear set arranged side by side along the axial direction of the inner ring gear, wherein the first-stage planetary gear set is meshed with the inner ring gear and the starting gear, and the third-stage planetary gear set is fixed to the output shaft. The partition includes a metal core and a rubber layer covering the metal core. The first end of the inner hole of the inner ring gear is provided with a first axial positioning step that is positioned to cooperate with the partition. The partition is interference fit with the first end of the inner hole of the inner ring gear through the rubber layer.

[0009] Preferably, a bearing and an oil seal are provided between the output shaft and the second end portion of the inner hole of the inner gear ring.

[0010] Preferably, the inner hole of the inner gear ring is provided with a hole elastic retaining ring between the bearing and the oil seal, and the outer circle of the output shaft is provided with a shaft elastic retaining ring between the bearing and the oil seal.

[0011] Preferably, the output shaft includes a flange portion and a shaft hole portion, the flange portion is provided with pin holes spaced apart along the circumferential direction, the pin holes are connected to pin shafts, and the planetary gears of the third-stage planetary gear set are connected to the pin shafts.

[0012] Preferably, the shaft hole portion is provided with a keyway.

[0013] Preferably, the shaft hole portion partially extends out of the second end of the inner gear ring.

[0014] Preferably, the starting gear and the planetary gear are both made of powder metallurgy gears.

[0015] Preferably, grease is filled between the inner ring gear and the planetary gear.

[0016] Preferably, the outer ring of the first end of the inner gear ring is provided with a convex ring, and the convex ring is connected to the motor by screws.

[0017] Preferably, the inner circle of the convex ring is provided with a second axial positioning step which cooperates with the motor in positioning.

[0018] The technical solution adopted by this utility model has the following technical effects:

[0019] 1. The multi-stage planetary gear reduction assembly is used to reduce speed and increase torque, which can achieve large torque output. It has the advantages of small structure size, large output torque, large speed ratio, high efficiency, safe and reliable performance.

[0020] 2. The multi-stage planetary gear reduction assembly includes an inner ring gear and three-stage planetary gear sets arranged side by side along the axial direction of the inner ring gear. There is no need to design additional input end cover and output end cover. This design structure is compact and saves installation space.

[0021] 3. While eliminating the input end cover, the input end is sealed with a partition cover, wherein the first end of the inner hole of the inner gear ring is provided with a first axial positioning step that cooperates with the partition to locate the axial position of the partition. In addition, the partition is in the form of rubber coating, including a metal core and a rubber coating layer covering the metal core. Not only can the thickness be set thinner and installed at the first end of the inner hole of the inner gear ring, but it is also easy to install and disassemble, and the surface has a rust-proof function.

[0022] 4. While eliminating the input end cover, in order to facilitate the assembly with the motor, a convex ring is provided on the outer ring of the first end of the inner gear ring. The convex ring is connected to the motor with screws, and the inner circle of the convex ring is provided with a second axial positioning step that cooperates with the motor positioning.

[0023] The inner gear ring adopts high-frequency processing to improve its service life. The specific technical solution and beneficial effects of the present invention will be described in detail in the following specific embodiments in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0025] Figure 1 It is a structural diagram of the utility model;

[0026] Figure 2 It is an axial view of the present utility model;

[0027] In the figure: 1-output shaft, 101-flange portion, 102-shaft hole portion, 103-pin shaft, 11-starting gear, 12-partition plate, 13-grease, 14-inner ring gear, 141-convex ring, 142-second axial positioning step, 143-first axial positioning step, 2-oil seal, 3-elastic circlip for hole, 4-elastic circlip for shaft, 5-bearing, 6-third-stage planetary gear, 7-second-stage planetary plate, 8-second-stage planetary gear, 9-first-stage planetary plate, 10-first-stage planetary gear. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0029] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," and "fixed" should be understood broadly. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of these terms in this utility model based on the specific circumstances.

[0030] Those skilled in the art will appreciate that, unless there is any conflict, the features in the following embodiments and implementations may be combined with each other.

[0031] like Figure 1 and Figure 2As shown, a reducer with a large torque output includes a multi-stage planetary gear reduction assembly and an output shaft 1, wherein the multi-stage planetary gear reduction assembly includes an inner ring gear 14, a partition 12 fixed to the first end of the inner hole of the inner ring gear, and a three-stage planetary gear set arranged side by side along the axial direction of the inner ring gear, wherein the first-stage planetary gear set is engaged with the inner ring gear 14 and the starting gear 11, and the third-stage planetary gear set is fixed to the output shaft 1, the partition 12 includes a metal core and a rubber layer covering the metal core, the first end of the inner hole of the inner ring gear is provided with a first axial positioning step 143 that is positioned and matched with the partition 12, and the partition 12 is interference fit with the first end of the inner hole of the inner ring gear through the rubber layer.

[0032] The technical solution of the embodiment of the utility model has the following technical effects:

[0033] 1. Use multi-stage planetary gear reduction components, at least three-stage planetary gear sets, to reduce speed and increase torque, which can achieve large torque output. It has the advantages of small structure size, large output torque, large speed ratio, high efficiency, safe and reliable performance.

[0034] 2. The multi-stage planetary gear reduction assembly includes an inner ring gear and a three-stage planetary gear set arranged side by side along the axial direction of the inner ring gear. Only one inner ring gear is required, and no additional input end cover and output end cover are required. This design structure is compact and saves installation space.

[0035] 3. While eliminating the input end cover, the input end is sealed with a partition cover, wherein the first end of the inner hole of the inner gear ring is provided with a first axial positioning step that cooperates with the partition to locate the axial position of the partition. In addition, the partition is in the form of rubber coating, including a metal core and a rubber coating layer covering the metal core. Not only can the thickness be set thinner and installed at the first end of the inner hole of the inner gear ring, but it is also easy to install and disassemble, and the surface has a rust-proof function.

[0036] The structure of the three-stage planetary gear set is based on existing technology and includes first-stage planetary gears 10, first-stage planetary plates 9, second-stage planetary gears 8, second-stage planetary plates 7, and third-stage planetary gears 6. A bearing 5 and an oil seal 2 are provided between the output shaft 1 and the second end of the inner bore of the ring gear. A hole-mounting circlip 3 is provided between the bearing and the oil seal on the inner bore of the ring gear, and a shaft-mounting circlip 4 is provided on the outer circumference of the output shaft between the bearing and the oil seal.

[0037] Furthermore, the output shaft 1 includes a flange portion 101 and a shaft hole portion 102. The flange portion 101 is provided with pin holes spaced circumferentially. These pin holes are connected to a pin shaft 103, to which the planetary gears of the third-stage planetary gear set are connected. The shaft hole portion is provided with a keyway, and the shaft hole portion partially extends beyond the second end of the inner ring gear to facilitate a keyed connection between the shaft hole portion and the connected transmission component.

[0038] Preferably, both the starting gear and the planetary gears are powder metallurgy gears. Through a single forming and finishing process, no additional post-processing is required, fully achieving dimensional accuracy requirements, particularly tooth profile accuracy. Therefore, compared to manufacturing using traditional machining methods, both material input and manufacturing costs are significantly reduced. The inner ring gear is high-frequency quenched to enhance strength and wear resistance. Grease 13 is filled between the inner ring gear and the planetary gears.

[0039] While eliminating the input end cover, in order to facilitate assembly with the motor, the outer ring of the first end of the inner gear ring is provided with a convex ring 141, which is connected to the motor with screws. The inner circle of the convex ring is provided with a second axial positioning step 142 that cooperates with the motor positioning.

[0040] In addition to the above preferred embodiments, the present invention has other implementation methods. Those skilled in the art can make various changes and modifications based on the present invention. As long as they do not depart from the spirit of the present invention, they should all fall within the scope defined in the claims of the present invention.

Claims

1. A speed reducer with high torque output, characterized by: It includes a multi-stage planetary gear reduction assembly and an output shaft. The multi-stage planetary gear reduction assembly includes an inner ring gear, a partition fixed to the first end of the inner hole of the inner ring gear, and a three-stage planetary gear set arranged side by side along the axial direction of the inner ring gear, wherein the first-stage planetary gear set is engaged with the inner ring gear and the starting gear, and the third-stage planetary gear set is fixed to the output shaft. The partition includes a metal core and a rubber layer covering the metal core. The first end of the inner hole of the inner ring gear is provided with a first axial positioning step that is positioned to cooperate with the partition. The partition is interference fit with the first end of the inner hole of the inner ring gear through the rubber layer.

2. The reducer according to claim 1, characterized in that: A bearing and an oil seal are provided between the output shaft and the second end portion of the inner hole of the inner gear ring.

3. The reducer according to claim 2, characterized in that: The inner hole of the inner gear ring is provided with a hole elastic circlip between the bearing and the oil seal, and the outer circle of the output shaft is provided with a shaft elastic circlip between the bearing and the oil seal.

4. The reducer according to claim 2, characterized in that: The output shaft includes a flange portion and a shaft hole portion. The flange portion is provided with pin holes spaced apart along the circumferential direction. The pin holes are connected to pin shafts, and the planetary gears of the third-stage planetary gear set are connected to the pin shafts.

5. The reducer according to claim 4, characterized in that: The shaft hole portion is provided with a keyway.

6. The reducer according to claim 4, characterized in that: The shaft hole portion partially extends out of the second end of the inner gear ring.

7. The reducer according to claim 1, characterized in that: The starting gear and the planetary gear are both made of powder metallurgy gears.

8. The reducer according to claim 1, characterized in that: Grease is filled between the inner gear ring and the planetary gears.

9. The reducer according to claim 1, characterized in that: A convex ring is provided on the outer ring of the first end of the inner gear ring, and the convex ring is connected to the motor by screws.

10. The reducer according to claim 9, characterized in that: The inner circle of the convex ring is provided with a second axial positioning step which is matched with the motor in positioning.

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