Planetary gear speed reducer

Abstract

The utility model relates to the technical field, in particular to a planetary gear speed reducer which comprises a shell, an input assembly, a planetary gear transmission assembly, an output assembly and a silencing assembly. A containing cavity is formed in the shell, the planetary gear transmission assembly is arranged in the containing cavity of the shell, and the input assembly is connected with the output assembly through the planetary gear transmission assembly so that power can be transmitted to the output assembly from the input assembly; the silencing assembly is arranged on the inner wall of the shell and comprises an installation groove body and a sound absorption cotton plate, the installation groove body is detachably connected with the inner wall of the shell, a plurality of through holes are formed in the installation groove body, and the installation groove body is provided with a containing groove for containing the sound absorption cotton plate. According to the noise reduction device, sound waves emitted by the planetary gear transmission assembly enter the noise reduction cotton plate through the through holes in the mounting groove body; and the energy of the sound waves can be absorbed by fibers and pores in the silencing cotton plate, so that the reflection and propagation of the sound waves are reduced, and the effect of reducing the noise of the planetary gear speed reducer is achieved.

Description

Technical Field

[0001] This application relates to the field of speed reducer technology, and in particular to a planetary gear reducer. Background Technology

[0002] A speed reducer is a power transmission device used to connect motors and mechanical equipment. It reduces motor speed and increases torque through the meshing of gears of different sizes. Specifically, the speed reducer meshes a smaller input gear with fewer teeth with a larger output gear with more teeth; this slows down the rotation of the larger output gear, thereby reducing the input speed and increasing torque.

[0003] A planetary gear reducer is a reducer that achieves speed reduction through a planetary gear transmission assembly. The planetary gear transmission assembly is housed within a housing and includes a sun gear, planet gears, a planet carrier, and a fixed ring gear. The sun gear is located at the center and is fixedly connected to the input shaft, which is connected to a motor. The planet gears revolve around the sun gear and rotate on their own axes. The planet carrier supports the planet gears, and the fixed ring gear meshes with the planet gears. The planet carrier is fixedly connected to the output shaft, which is connected to a mechanical device.

[0004] Due to the complex structure and operating conditions of planetary gear transmission components, vibration and noise problems are particularly prominent in planetary gear reducers. Utility Model Content

[0005] In order to reduce the noise generated during the operation of the planetary gear reducer, this application provides a planetary gear reducer.

[0006] This application provides a planetary gear reducer, which adopts the following technical solution:

[0007] A planetary gear reducer includes a housing, an input component, a planetary gear transmission component, an output component, and a noise reduction component. The housing has an internal receiving chamber, and the planetary gear transmission component is disposed within this chamber. The input component is connected to the output component via the planetary gear transmission component to transmit power from the input component to the output component. The noise reduction component is disposed on the inner wall of the housing and includes a mounting groove and a sound-absorbing cotton board. The mounting groove is detachably connected to the inner wall of the housing, has several through holes, and includes a receiving groove for accommodating the sound-absorbing cotton board.

[0008] By adopting the above technical solution, the sound waves emitted by the planetary gear transmission assembly enter the sound-absorbing cotton plate through the through holes on the mounting slot; the energy of the sound waves is absorbed by the fibers and pores inside the sound-absorbing cotton plate, and the fibers and pores inside the sound-absorbing cotton plate can convert the mechanical energy of the sound waves into heat energy, thereby reducing the reflection and propagation of the sound waves and achieving the effect of reducing the noise of the planetary gear reducer.

[0009] Optionally, at least two noise reduction components are provided, and the noise reduction components are disposed on both sides of the planetary gear transmission component along the power transmission direction of the reducer.

[0010] By adopting the above technical solution, and by setting silencing components on both sides of the planetary gear transmission assembly, the absorption effect of the silencing components on sound waves is improved, thereby further reducing the noise of the planetary gear reducer.

[0011] Optionally, the noise reduction component is disposed opposite to the planetary gear transmission component.

[0012] By adopting the above technical solution, the noise reduction component is arranged opposite to the planetary gear transmission component so that the noise reduction component can absorb the sound waves emitted by the planetary gear transmission component, thereby increasing the absorption capacity of the noise reduction component and reducing the noise of the planetary gear reducer.

[0013] Optionally, the noise reduction component has a ring structure.

[0014] By adopting the above technical solution, the noise reduction component is a ring structure, which makes the position of the noise reduction component match the ring motion trajectory of the planetary gears in the planetary gear transmission component, so as to improve the absorption effect of the noise reduction component on sound waves and reduce the noise of the planetary gear reducer.

[0015] Optionally, several of the noise reduction components are located on the same mounting surface, and the several noise reduction components are arranged at annular intervals.

[0016] By adopting the above technical solution, several noise reduction components are arranged in a ring at intervals, so that the position of the noise reduction components is adapted to the ring motion trajectory of the planetary gears in the planetary gear transmission assembly, thereby improving the absorption effect of the noise reduction components on sound waves and reducing the noise of the planetary gear reducer.

[0017] Meanwhile, several noise reduction components are arranged in a ring at intervals, so that there is a clearance between adjacent noise reduction components, in order to improve the absorption of sound waves by the noise reduction components and reduce the noise of the planetary gear reducer.

[0018] Optionally, the noise reduction assembly further includes a flexible pad disposed between the mounting groove and the housing.

[0019] By adopting the above technical solution and setting a flexible pad between the mounting groove and the housing, the stability of the connection between the mounting groove and the housing is improved, and the noise of the planetary gear reducer is further reduced.

[0020] Optionally, the mounting groove is bolted to the housing.

[0021] By adopting the above technical solution, the mounting groove is bolted to the shell, which ensures the stability of the connection between the mounting groove and the shell while facilitating installation by the staff.

[0022] Optionally, the housing is provided with lifting rings.

[0023] By adopting the above technical solution, a lifting ring is provided on the housing to facilitate the movement of the planetary gear reducer by the staff.

[0024] In summary, this application includes at least one of the following beneficial technical effects:

[0025] 1. The sound waves emitted by the planetary gear transmission assembly enter the sound-absorbing cotton plate through the through holes on the mounting slot; the energy of the sound waves is absorbed by the fibers and pores inside the sound-absorbing cotton plate. The fibers and pores inside the sound-absorbing cotton plate can convert the mechanical energy of the sound waves into heat energy, thereby reducing the reflection and propagation of the sound waves and reducing the noise of the planetary gear reducer.

[0026] 2. The noise reduction component is arranged opposite to the planetary gear transmission component so that the noise reduction component can absorb the sound waves emitted by the planetary gear transmission component, thereby increasing the absorption capacity of the noise reduction component and reducing the noise of the planetary gear reducer.

[0027] 3. The noise reduction assembly is a ring-shaped assembly, which makes the position of the noise reduction assembly match the ring motion trajectory of the planetary gears in the planetary gear transmission assembly, so as to improve the absorption effect of the noise reduction assembly on sound waves and reduce the noise of the planetary gear reducer. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the planetary gear reducer in Example 1.

[0029] Figure 2 This is a schematic diagram of the internal structure of the planetary gear reducer in Example 1.

[0030] Figure 3 yes Figure 2 Enlarged view of point A in the middle.

[0031] Figure 4 This is a schematic diagram of the installation position of the noise reduction component in Example 1.

[0032] Figure 5 This is a schematic diagram of the silencing component in Example 1.

[0033] Figure 6 yes Figure 5 Enlarged view of point B in the middle.

[0034] Figure 7 This is a schematic diagram of the installation position of the noise reduction component in Example 2.

[0035] Explanation of reference numerals in the attached drawings: 1. Housing; 11. First housing; 12. Second housing; 13. Receiving chamber; 2. Input component; 3. Planetary gear transmission component; 4. Output component; 5. Silencing component; 51. Mounting slot; 511. Connecting ear plate; 512. Through hole; 513. Mounting slot; 52. Sound-absorbing cotton board; 53. Flexible pad; 6. Lifting ring. Detailed Implementation

[0036] The following is in conjunction with the appendix Figure 1 Section 7 provides further details regarding this application.

[0037] This application discloses a planetary gear reducer. (Refer to...) Figure 1 and Figure 2 The planetary gear reducer includes a housing 1, an input component 2, a planetary gear transmission component 3, an output component 4, and a noise reduction component 5.

[0038] Reference Figure 1 and Figure 2 The housing 1 is equipped with a lifting ring 6 to facilitate the movement of the planetary gear reducer by the operator. The housing 1 includes a first housing 11 and a second housing 12, which are fixedly connected by bolts and form a receiving chamber 13.

[0039] Reference Figure 2 and Figure 3 The planetary gear transmission assembly 3 is disposed in the receiving chamber 13 of the housing 1. The input assembly 2 is connected to the output assembly 4 through the planetary gear transmission assembly 3 to transmit power from the input assembly 2 to the output assembly 4. In this embodiment, the input assembly 2 is disposed on the first housing 11 and is used for the motor; the output assembly 4 is disposed on the second housing 12 and is used to connect mechanical equipment, such as cranes, conveyor belts, etc., thereby reducing the high speed of the motor to the low speed required by the mechanical equipment.

[0040] In existing planetary gear reducers, the planetary gear transmission assembly 3, input assembly 2, and output assembly 4 have various implementations. This embodiment will not elaborate on the specific structures of the planetary gear transmission assembly 3, input assembly 2, and output assembly 4. The difference between this application and the prior art is that the technical solution of this application provides a noise reduction assembly 5 inside the housing 1 to reduce the noise of the planetary gear reducer; this embodiment will provide a detailed description of the noise reduction assembly 5.

[0041] Reference Figure 2 and Figure 3The noise-absorbing components 5 are disposed on the inner wall of the housing 1 to absorb the sound waves generated by the operation of the planetary gear transmission assembly 3, thereby reducing the noise of the planetary gear reducer. At least two noise-absorbing components 5 are provided, positioned on both sides of the planetary gear transmission assembly 3 along the power transmission direction of the reducer. By providing noise-absorbing components 5 on both sides of the planetary gear transmission assembly 3, the absorption effect of the noise-absorbing components 5 on sound waves is improved, further reducing the noise of the planetary gear reducer. In this embodiment, two noise-absorbing components 5 are provided, positioned on both sides of the planetary gear transmission assembly 3.

[0042] Reference Figure 2 and Figure 3 In this embodiment, the noise-absorbing component 5 is disposed opposite to the planetary gear transmission component 3 so that the noise-absorbing component 5 can absorb the sound waves emitted by the planetary gear transmission component 3 and reduce the noise of the planetary gear reducer. In this embodiment, the two noise-absorbing components 5 are respectively disposed on the bottom walls of the first housing 11 and the second housing 12; while in other embodiments, the two noise-absorbing components 5 may be disposed on the annular sidewall of the second housing 12.

[0043] Reference Figure 2 and Figure 4 In this embodiment, the noise reduction component 5 is a ring structure, so that the position of the noise reduction component 5 is adapted to the ring motion trajectory of the planetary gear in the planetary gear transmission component 3, so as to improve the sound absorption effect of the noise reduction component 5 and reduce the noise of the planetary gear reducer.

[0044] Reference Figure 5 and Figure 6 The noise reduction assembly 5 includes a mounting groove 51, a sound-absorbing cotton board 52, and a flexible pad 53. The mounting groove 51 is detachably connected to the inner wall of the housing 1. The mounting groove 51 has several through holes 512 for sound waves to pass through. The mounting groove 51 is provided with a receiving groove to accommodate the sound-absorbing cotton board 52, which is used to absorb sound waves. In this embodiment, connecting ear plates 511 are provided on both sides of the mounting groove, and the connecting ear plates 511 are bolted to the housing 1.

[0045] Reference Figure 5 and Figure 6 A flexible pad 53 is disposed between the mounting groove 51 and the housing 1, and the flexible pad 53 has the elasticity to move. By providing a flexible pad 53 between the mounting groove 51 and the housing 1, the stability of the connection between the mounting groove 51 and the housing 1 is improved, and the noise of the planetary gear reducer is further reduced. The flexible pad 53 can be a rubber pad, a silicone pad, etc.; in this embodiment, the flexible pad 53 is a rubber pad.

[0046] The implementation principle of a planetary gear reducer according to an embodiment of this application is as follows:

[0047] Reference Figure 4and Figure 5 The sound waves emitted by the planetary gear transmission assembly 3 enter the sound-absorbing cotton plate through the through hole 512 on the mounting groove 51. The energy of the sound waves is absorbed by the fibers and pores inside the sound-absorbing cotton plate. The fibers and pores inside the sound-absorbing cotton plate can convert the mechanical energy of the sound waves into heat energy, thereby reducing the reflection and propagation of the sound waves and reducing the noise of the planetary gear reducer.

[0048] Example 2

[0049] The difference between Example 2 and Example 1 is as follows:

[0050] Reference Figure 7 Several noise reduction components 5 are located on the same mounting surface and are arranged in a ring with intervals. Taking the noise reduction component 5 installed on the first housing 11 as an example, in this embodiment, the first housing 11 is provided with five noise reduction components 5, which are arranged in a ring with intervals.

[0051] The implementation principle of a planetary gear reducer according to an embodiment of this application is as follows:

[0052] Several noise-absorbing components 5 are arranged in a ring at intervals, so that the position of the noise-absorbing components 5 is adapted to the ring motion trajectory of the planetary gears in the planetary gear transmission assembly 3, so as to improve the sound wave absorption effect of the noise-absorbing components 5 and reduce the noise of the planetary gear reducer.

[0053] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A planetary gear reducer, characterized in that: The device includes a housing (1), an input component (2), a planetary gear transmission component (3), an output component (4), and a noise reduction component (5). The housing (1) has an internal receiving chamber (13). The planetary gear transmission component (3) is located in the receiving chamber (13) of the housing (1). The input component (2) is connected to the output component (4) through the planetary gear transmission component (3) to transmit power from the input component (2) to the output component (4). The noise reduction component (5) is located on the inner wall of the housing (1). The noise reduction component (5) includes a mounting groove (51) and a sound-absorbing cotton board (52). The mounting groove (51) is detachably connected to the inner wall of the housing (1). The mounting groove (51) has several through holes (512). The mounting groove (51) has a receiving groove for accommodating the sound-absorbing cotton board (52).

2. The planetary gear reducer according to claim 1, characterized in that: At least two noise reduction components (5) are provided, and along the power transmission direction of the reducer, the noise reduction components (5) are provided on both sides of the planetary gear transmission component (3).

3. The planetary gear reducer according to claim 1, characterized in that: The noise reduction component (5) is disposed opposite to the planetary gear transmission component (3).

4. The planetary gear reducer according to claim 3, characterized in that: The noise reduction component (5) has a ring structure.

5. The planetary gear reducer according to claim 3, characterized in that: Several of the noise reduction components (5) are located on the same mounting surface, and the several noise reduction components (5) are arranged in a ring at intervals.

6. The planetary gear reducer according to claim 1, characterized in that: The noise reduction assembly (5) also includes a flexible pad (53), which is disposed between the mounting groove (51) and the housing (1).

7. The planetary gear reducer according to claim 6, characterized in that: The mounting groove (51) is bolted to the housing (1).

8. The planetary gear reducer according to claim 1, characterized in that: The housing (1) is provided with a lifting ring (6).

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