Assembly type planetary gear transmission assembly

Abstract

The utility model belongs to the technical field of mechanical transmission, and particularly relates to an assembly type planetary gear transmission assembly. The utility model provides an assembly type planetary gear transmission assembly. The assembly type planetary gear transmission assembly comprises a fixing frame, a gear ring elastically installed in the fixing frame, a sun gear coaxial with the gear ring and a plurality of planetary gears connected between the gear ring and the sun gear in a meshed mode. The planet gear is rotationally arranged on the planet carrier, the planet carrier is a first power connecting end, and the sun gear is a second power connecting end; clamping structures are formed on the inner side of the fixing frame and the outer side of the gear ring, and an elastic gasket is connected between the inner side of the fixing frame and the outer side of the gear ring in a clamped mode. According to the assembly type planetary gear transmission assembly, balanced distribution of torque of the planetary gear can be achieved, vibration, noise and tooth surface abrasion generated by meshing of the planetary gear and the gear ring are effectively reduced, and therefore the transmission efficiency is improved, and the service life is prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of mechanical transmission, and in particular relates to an assembled planetary gear transmission component. Background Art

[0002] A planetary gear set is a component widely used in the field of mechanical transmission, and mainly includes a sun gear, a planet carrier, planetary gears and a ring gear.

[0003] The planetary gear set has a compact structure and can achieve a larger transmission ratio in a smaller space. The planetary gear set has a very flexible transmission mode. By changing the component combination and parameters of the planetary gear set, a variety of transmission modes can be achieved, such as speed increase, speed reduction, one-way, differential, etc., which provides great convenience for the transmission design of various mechanical equipment. In addition, the planetary gear set also has a high transmission efficiency, and the power can be efficiently transmitted from the input shaft to the output shaft. Under ideal conditions, the transmission efficiency of the planetary gear set can reach about 99%.

[0004] Therefore, planetary gear sets are widely used in the fields of automobiles, engineering machinery, ships, aerospace, etc. For example, in the automotive field, planetary gear sets can be used in automatic transmissions to achieve automatic gear shifting of vehicles. In the field of engineering machinery, planetary gear sets can be used to achieve stepless speed change and power distribution. In addition, planetary gear sets can also be used in indexing mechanisms, steering gears and other devices.

[0005] However, planetary gear sets also have some inherent defects. Planetary gear sets have high requirements for manufacturing and installation precision, and the precision of planetary gear sets directly affects the transmission performance and service life. During the transmission process, multiple planetary gears distributed in the annular direction between the ring gear and the sun gear are subjected to force at the same time. Due to the limitations of manufacturing and installation precision, the torques borne by each planetary gear often vary greatly, which can easily lead to problems such as vibration and noise. In addition, the vibration caused by uneven force will also aggravate the wear of the tooth surface, further affecting the transmission efficiency and service life. Utility Model Content

[0006] In view of the deficiencies in the prior art, the utility model provides an assembled planetary gear transmission assembly.

[0007] The utility model provides an assembled planetary gear transmission component, comprising a fixed frame, a gear ring elastically installed in the fixed frame, a sun gear coaxially arranged with the gear ring, and a plurality of planetary gears meshingly connected between the gear ring and the sun gear; the planetary gears are rotatably arranged on the planetary frame, the planetary frame is the first power connection end, and the sun gear is the second power connection end; a clamping structure is formed on the inner side of the fixed frame and the outer side of the gear ring, and an elastic gasket is clamped and connected between the inner side of the fixed frame and the outer side of the gear ring.

[0008] Furthermore, in the above-mentioned assembled planetary gear transmission assembly, a plurality of clamping units are distributed in a circular array on the inner side of the fixed frame, and a plurality of clamping units are also distributed in a circular array on the outer side of the ring gear, and the clamping units on the fixed frame and the clamping units on the ring gear are staggered with each other; an annular tortuous clamping space is formed between the clamping units on the fixed frame and the clamping units on the ring gear, and the elastic gasket is assembled in the clamping space.

[0009] Furthermore, in the above-mentioned assembled planetary gear transmission assembly, the clamping unit includes a type-one clamping unit having a first base layer and a first structural layer combined with a surface of the first base layer.

[0010] Furthermore, in the above-mentioned assembled planetary gear transmission assembly, the first structural layer is T-shaped, and the direction along the symmetry axis of the T-shape from the wide end to the narrow end is recorded as the characteristic direction of the type-one clip-on unit; the characteristic directions of the type-one clip-on units on the fixed frame and the ring gear are both parallel to the axial direction of the sun gear.

[0011] Furthermore, in the above-mentioned assembled planetary gear transmission assembly, multiple type-A clip-on units with consistent characteristic directions are distributed circumferentially on the inner side of the fixed frame, and multiple type-A clip-on units with consistent characteristic directions are also distributed circumferentially on the outer side of the ring gear, and the characteristic direction of the type-A clip-on units on the fixed frame is opposite to the characteristic direction of the type-A clip-on units on the ring gear.

[0012] Furthermore, in the above-mentioned assembled planetary gear transmission assembly, the clamping unit also includes a type II clamping unit, which has a second base layer and a second structural layer combined with the surface of the second base layer, and the second structural layer is H-shaped.

[0013] Furthermore, in the above-mentioned assembled planetary gear transmission assembly, a type II clamping unit and a plurality of type I clamping units are arranged on the inner side of the fixing frame; and the two opening sides of the H-shaped second structural layer are arranged along the circumferential direction.

[0014] Furthermore, in the above-mentioned assembled planetary gear transmission assembly, two type II clamping units are relatively arranged on the inner side of the fixing frame, and a plurality of type I clamping units are also arranged on the inner side of the fixing frame; and the two opening sides of the H-shaped second structural layer are arranged along the circumferential direction.

[0015] Furthermore, in the above-mentioned assembled planetary gear transmission assembly, the surface of the first structural layer is recorded as the characteristic surface of the first type of clamping unit; the distance between the characteristic surface of the first type of clamping unit located on the inner side of the fixing frame and the axis of the sun gear is smaller than the distance between the characteristic surface of the first type of clamping unit located on the outer side of the gear ring and the axis of the sun gear. The interface between the first base layer and the first structural layer is recorded as the characteristic base surface of the first type of clamping unit; the distance between the characteristic base surface of the first type of clamping unit located on the inner side of the fixing frame and the axis of the sun gear is larger than the distance between the characteristic base surface of the first type of clamping unit located on the outer side of the gear ring and the axis of the sun gear.

[0016] The utility model further provides a planetary gear reduction box, wherein the housing of the planetary gear reduction box has the assembled planetary gear transmission assembly built in, the planet carrier is the output end of the power, and the sun gear is the input end of the power.

[0017] Beneficial Effects

[0018] The assembled planetary gear transmission assembly provided by the utility model utilizes the elasticity of the elastic gasket so that the gear ring can adaptively adjust the position and angle to balance the forces on each planetary gear and realize the balanced distribution of torque. Since the planetary gear transmission assembly can automatically balance the forces, the vibration and noise generated during the operation can be reduced. The balanced distribution of torque reduces the excessive pressure on a single gear, thereby reducing the wear of the tooth surface and extending the life of the parts. The transmission efficiency is improved by reducing wear and running smoothly. The design of the clamping structure enhances the coupling effect between the fixed frame and the gear ring, thereby better transmitting the force torque and reducing the gear impact noise and torque fluctuation caused by the meshing of the planetary gear and the gear ring. The reverse arrangement of the first-type clamping unit on the fixed frame and the gear ring makes the assembly more accurate and convenient, and the combination of the first-type clamping unit and the second-type clamping unit further improves the stability of the assembly. By reasonably designing the relative positions of the characteristic surface and the characteristic base surface of the clamping unit, the elastic gasket can fully exert its elasticity and is not prone to shear damage when subjected to a large torque. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of an assembled planetary gear transmission assembly.

[0020] Figure 2 An exploded schematic diagram of an assembled planetary gear transmission assembly.

[0021] Figure 3 It is a structural schematic diagram of a type of card connection unit.

[0022] Figure 4 It is a schematic diagram of the structure of the second type card connection unit. DETAILED DESCRIPTION

[0023] The present invention is further illustrated by the following examples, which are intended to more clearly illustrate the technical solution of the present invention and should not be construed as a limitation.

[0024] like Figure 1 and Figure 2 An assembled planetary gear transmission assembly shown in the figure comprises a fixed frame 1, a ring gear 3 elastically mounted in the fixed frame, a sun gear 5 coaxially arranged with the ring gear 3, and a plurality of planetary gears 4 meshingly connected between the ring gear 3 and the sun gear 5; the planetary gears 4 are rotatably arranged on the planetary frame, the planetary frame is the first power connection end, and the sun gear 5 is the second power connection end; a clamping structure is formed on the inner side of the fixed frame 1 and the outer side of the ring gear 3, and an elastic gasket 2 is clamped and connected between the inner side of the fixed frame 1 and the outer side of the ring gear 3.

[0025] The elastic gasket 2 is preferably a rubber ring or a silicone ring, and its elasticity enables the gear ring 3 to adaptively adjust its position and angle, thereby balancing the forces on each planetary gear 4. Specifically, when the planetary gear transmission assembly is in operation, if there are differences in the forces on each planetary gear 4, the gear ring 3 will be subjected to unbalanced forces, and the position inside the elastic gasket 2 will be adaptively adjusted slightly, so that the torque of one part of the planetary gear 4 with greater forces can be transferred to another part of the planetary gear 4 with less forces, thereby achieving a balanced distribution of torque. Therefore, even in the case of low manufacturing and installation precision, the planetary gear transmission assembly can still achieve smooth and smooth operation, reduce vibration, noise and tooth surface wear, while also improving transmission efficiency and extending service life.

[0026] Preferably, a plurality of snap-in units are distributed in an annular array on the inner side of the fixing frame 1, and a plurality of snap-in units are distributed in an annular array on the outer side of the ring gear 3, and the snap-in units on the fixing frame 1 and the snap-in units on the ring gear 3 are staggered. The staggered arrangement of the snap-in units can increase the contact range between the fixing frame 1 and the ring gear 3, increase the force points that bear the circumferential force, thereby enhancing the coupling effect between each other and better transmitting force and torque. In addition, due to the staggered arrangement of the snap-in units, a snap-in space that is generally annular and partially tortuous is formed between the snap-in units on the fixing frame 1 and the snap-in units on the ring gear 3, and the elastic gasket 2 is assembled in the snap-in space, which is conducive to balanced force and can also improve the stability of the assembly of the elastic gasket 2 to prevent loosening or displacement.

[0027] like Figure 2 and Figure 3As shown, the clamping unit includes a type-I clamping unit 7, and the type-I clamping unit 7 has a first base layer 71 and a first structural layer 72 bonded to the surface of the first base layer 71. The first structural layer 72 is T-shaped, and the direction from the wide end to the narrow end along the symmetry axis of the T-shape is recorded as the characteristic direction of the type-I clamping unit 7, as indicated by direction A in the figure. And the characteristic directions of the type-I clamping unit 7 on the fixing frame 1 and the ring gear 3 are parallel to the axial direction of the sun gear 5.

[0028] like Figure 2 The preferred setting direction of the first-type clamping unit 7 is shown. Specifically, multiple first-type clamping units 7 with the same characteristic direction are circumferentially distributed on the inner side of the fixing frame 1, and multiple first-type clamping units 7 with the same characteristic direction are also circumferentially distributed on the outer side of the ring gear 3, and the characteristic direction of the first-type clamping unit 7 on the fixing frame 1 is opposite to the characteristic direction of the first-type clamping unit 7 on the ring gear 3. In this way, during assembly, the elastic washer 2 can be conveniently and accurately placed on the inner side of the fixing frame 1, and then the ring gear 3 is inserted into the fixing frame 1 along the characteristic direction of the first-type clamping unit 7 on the ring gear 3 until the ring gear 3 is clamped by the elastic washer 2, and at this time, the ring gear 3, the elastic washer 2 and the fixing frame 1 are assembled in place.

[0029] As mentioned above, the type-one clamping unit 7 brings great convenience to assembly, but its anti-loosening and anti-dropping properties are not strong. Therefore, a part of the type-one clamping unit 7 can be replaced by the type-two clamping unit 8. Figure 4 As shown, the second-type clamping unit 8 comprises a second base layer 81 and a second structural layer 82 combined with the surface of the second base layer 81 , and the second structural layer 82 is H-shaped.

[0030] Considering the convenience of installing the elastic gasket 2, it is better to set a small number of type-two snap-in units 8 on the inner side of the fixing frame 1. For example, a type-two snap-in unit 8 is set on the inner side of the fixing frame 1, and a plurality of type-one snap-in units 7 are set at other positions; and the two opening sides of the H-shaped second structural layer 82 are arranged along the circumferential direction. For another example, two type-two snap-in units 8 are relatively set on the inner side of the fixing frame 1, and a plurality of type-one snap-in units 7 are set at other positions; and the two opening sides of the H-shaped second structural layer 82 are arranged along the circumferential direction. In this way, when assembling the elastic gasket 2, first snap the corresponding combination points on the elastic gasket 2 into the type-two snap-in units 8, and then snap the other combination points into the corresponding type-one snap-in units 7, which not only has better assembly convenience, but also can prevent the elastic gasket 2 from loosening when the gear ring 3 is installed.

[0031] The surface of the first structural layer 72 is recorded as the characteristic surface of the first type of clamping unit 7; the interface between the first base layer 71 and the first structural layer 72 is recorded as the characteristic base surface of the first type of clamping unit 7; the distance between the characteristic surface of the first type of clamping unit 7 located on the inner side of the fixing frame 1 and the axis of the sun gear 5 is less than the distance between the characteristic surface of the first type of clamping unit 7 located on the outer side of the gear ring 3 and the axis of the sun gear 5; and the distance between the characteristic base surface of the first type of clamping unit 7 located on the inner side of the fixing frame 1 and the axis of the sun gear 5 is greater than the distance between the characteristic base surface of the first type of clamping unit 7 located on the outer side of the gear ring 3 and the axis of the sun gear 5. By setting the relative positions of the characteristic surface and the characteristic base surface of the first type of clamping unit 7 in the radial direction in the above manner, the clamping units on the gear ring 3 and the fixing frame 1 can maintain an appropriate degree of overlap with the elastic gasket 2 in the radial direction, so that the gear ring 3 and the fixing frame 1 maintain a good elastic connection relationship in the circumferential direction, and at the same time, the gear ring 3 and the fixing frame 1 can withstand a large circumferential torsion, thereby avoiding shear damage of the elastic gasket 2 when subjected to a large torque.

[0032] On the basis of the above-mentioned assembled planetary gear transmission assembly, a planetary gear reducer can be further manufactured, in which a planetary gear transmission assembly is built into the housing of the planetary gear reducer. Among them, the planet carrier serves as the output end of the power, and the sun gear 5 serves as the input end of the power. At this time, the ratio of the output end speed to the input end speed is 1 / (1+α), where α is the ratio of the number of teeth of the ring gear 3 to the number of teeth of the sun gear 5. By adjusting the number of teeth of the ring gear 3 and / or the number of teeth of the sun gear 5, it is possible to easily adapt to different reduction ratio requirements. The planetary gear reducer not only has the characteristics of low vibration and low noise, but also has a compact transmission structure, efficient transmission performance and a long service life.

[0033] The above implementation modes are exemplary, and their purpose is to illustrate the technical concept and features of the utility model so that people familiar with the technology in this field can understand the content of the utility model and implement it accordingly, and they cannot be used to limit the protection scope of the utility model. Any equivalent changes or modifications made according to the spirit of the utility model should be included in the protection scope of the utility model.

Claims

1. An assembled planetary gear transmission assembly, characterized in that: The invention comprises a fixing frame (1), a ring gear (3) elastically mounted in the fixing frame, a sun gear (5) coaxially arranged with the ring gear (3), and a plurality of planetary gears (4) meshingly connected between the ring gear (3) and the sun gear (5); the planetary gears (4) are rotatably arranged on the planetary frame, the planetary frame is a first power connection end, and the sun gear (5) is a second power connection end; a clamping structure is formed on the inner side of the fixing frame (1) and the outer side of the ring gear (3), and an elastic gasket (2) is clamped and connected between the inner side of the fixing frame (1) and the outer side of the ring gear (3).

2. The assembled planetary gear transmission assembly according to claim 1, characterized in that: A plurality of snap-in units are distributed in an annular array on the inner side of the fixing frame (1), and a plurality of snap-in units are distributed in an annular array on the outer side of the gear ring (3), and the snap-in units on the fixing frame (1) and the snap-in units on the gear ring (3) are arranged staggered with each other; an annular tortuous snap-in space is formed between the snap-in units on the fixing frame (1) and the snap-in units on the gear ring (3), and the elastic gasket (2) is assembled in the snap-in space.

3. The assembled planetary gear transmission assembly according to claim 2, characterized in that: The clamping unit comprises a type I clamping unit (7), wherein the type I clamping unit (7) comprises a first base layer (71) and a first structural layer (72) bonded to the surface of the first base layer (71).

4. The assembled planetary gear transmission assembly according to claim 3, characterized in that: The first structural layer (72) is T-shaped, and the direction from the wide end to the narrow end along the symmetry axis of the T-shape is recorded as the characteristic direction of the first-type clamping unit (7); the characteristic directions of the first-type clamping unit (7) on the fixing frame (1) and the gear ring (3) are parallel to the axial direction of the sun gear (5).

5. The assembled planetary gear transmission assembly according to claim 4, characterized in that: A plurality of first-type clamping units (7) having a consistent characteristic direction are circumferentially distributed on the inner side of the fixing frame (1), and a plurality of first-type clamping units (7) having a consistent characteristic direction are also circumferentially distributed on the outer side of the gear ring (3), and the characteristic direction of the first-type clamping units (7) on the fixing frame (1) is opposite to the characteristic direction of the first-type clamping units (7) on the gear ring (3).

6. The assembled planetary gear transmission assembly according to claim 4, characterized in that: The clamping unit further comprises a second-type clamping unit (8), wherein the second-type clamping unit (8) comprises a second base layer (81) and a second structural layer (82) bonded to the surface of the second base layer (81), wherein the second structural layer (82) is H-shaped.

7. The assembled planetary gear transmission assembly according to claim 6, characterized in that: One of the second-type clamping units (8) and a plurality of the first-type clamping units (7) are arranged on the inner side of the fixing frame (1); and two opening sides of the H-shaped second structural layer (82) are arranged along the circumferential direction.

8. The assembled planetary gear transmission assembly according to claim 6, characterized in that: Two of the second-type clamping units (8) are arranged opposite to each other on the inner side of the fixing frame (1), and a plurality of the first-type clamping units (7) are also arranged on the inner side of the fixing frame (1); and the two opening sides of the H-shaped second structural layer (82) are arranged along the circumferential direction.

9. The assembled planetary gear transmission assembly according to claim 3, characterized in that: The surface of the first structural layer (72) is recorded as the characteristic surface of the first-type clamping unit (7); the distance between the characteristic surface of the first-type clamping unit (7) located on the inner side of the fixing frame (1) and the axis of the sun gear (5) is smaller than the distance between the characteristic surface of the first-type clamping unit (7) located on the outer side of the gear ring (3) and the axis of the sun gear (5).

10. The assembled planetary gear transmission assembly according to claim 9, characterized in that: The interface between the first base layer (71) and the first structural layer (72) is recorded as the characteristic base surface of the first-type clamping unit (7); the distance between the characteristic base surface of the first-type clamping unit (7) located on the inner side of the fixing frame (1) and the axis of the sun gear (5) is greater than the distance between the characteristic base surface of the first-type clamping unit (7) located on the outer side of the gear ring (3) and the axis of the sun gear (5).

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