A high-precision planetary gear reducer

Abstract

The utility model relates to the technical field of speed reducer, concretely to a high accuracy planetary gear speed reducer, including the casing, the casing includes the fixedly connected bottom shell and top shell, the casing is rotatably connected with input shaft and output shaft, the casing is provided with two groups of parallelly arranged planetary gear assembly, two groups planetary gear assembly's transmission ratio is different, input shaft links to each other through two transmission assemblies no.

Description

Technical Field

[0001] This utility model relates to the field of speed reducer technology, specifically a high-precision planetary gear reducer. Background Technology

[0002] Planetary gear reducers are named for their transmission structure. The main transmission mechanism consists of planetary gears, a sun gear, and an external gear ring. Because planetary reducers have a large number of meshing teeth when rotating, they have high load-bearing capacity and high precision. Compared with gear reducers, planetary reducers have better gear meshing precision, higher accuracy, lower noise during operation, and smaller overall size, making them suitable for various working environments.

[0003] Most planetary gear reducers in the existing technology can only achieve one reduction ratio due to the limitations of their mechanical structure. A few planetary gear reducers that can change the reduction ratio require manual adjustment of the position of the driving gear to mesh with different gear sets, which is quite troublesome to use. Utility Model Content

[0004] The purpose of this utility model is to provide a high-precision planetary gear reducer to solve the problems mentioned in the background art. To achieve the above objective, this utility model provides the following technical solution:

[0005] A high-precision planetary gear reducer includes a housing, which comprises a bottom shell and a top shell fixedly connected together. An input shaft and an output shaft are rotatably connected to the housing. Two sets of parallel planetary gear assemblies are disposed inside the housing. The two sets of planetary gear assemblies have different transmission ratios. The input shaft is connected to the two planetary gear assemblies through two transmission components, and the output shaft is connected to the two planetary gear assemblies through a second transmission component.

[0006] Preferably, the planetary gear assembly includes a rotating sleeve rotatably connected to the input shaft, a sun gear fixedly connected to the rotating sleeve, the sun gear meshing with three planetary gears evenly distributed on the outer side, the three planetary gears being rotatably connected to a planetary gear carrier, the planetary gear carrier being mounted on the transmission assembly two, and the three planetary gears also meshing with a fixed internal gear ring, the fixed internal gear ring being fixedly connected inside the housing.

[0007] Preferably, the transmission assembly includes a sliding sleeve slidably connected to the input shaft. One end of the sliding sleeve is fixedly connected to a driving end-face ratchet, and one end of the rotating sleeve is fixedly connected to a driven end-face ratchet. The driving end-face ratchet and the driven end-face ratchet are opposite to each other. A baffle is fixedly connected to the input shaft, and a spring is fixedly connected between the driving end-face ratchet and the baffle. Under the elastic force of the spring, the driving end-face ratchet is engaged with the driven end-face ratchet.

[0008] Preferably, the two transmission components are in opposite directions. When the input shaft rotates, one of the transmission components can rotate the corresponding sun gear, while the other cannot.

[0009] Preferably, the transmission assembly two includes two fixed brackets, which are symmetrically fixedly connected to the housing. Two connecting cylinders are symmetrically fixedly connected to the two fixed brackets. A planetary gear carrier is fixedly connected to one end of each connecting cylinder, and a driving bevel gear is fixedly connected to the other end of each connecting cylinder. A driven bevel gear is fixedly connected to the end of the output shaft, and the driven bevel gear meshes with the two driving bevel gears.

[0010] Preferably, the two connecting cylinders are rotatably connected to the input shaft.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0012] In this invention, the input shaft can drive the planetary gear assembly through the first transmission component, and the planetary gear assembly can drive the output shaft to rotate through the second transmission component. By changing the rotation direction of the input shaft, the output shaft can be rotated through different planetary gear assemblies, thereby changing the reduction ratio of the reducer. It is very simple to use.

[0013] In this invention, by setting an active bevel gear and a driven bevel gear, when the two planetary gear carriers rotate in opposite directions, the rotation direction of the output shaft can remain unchanged after being transmitted by the active bevel gear and the driven bevel gear, thereby avoiding the influence of the change in the rotation direction of the input shaft on the rotation direction of the output shaft. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the internal structure of the present invention;

[0016] Figure 3 This is a schematic diagram of the planetary gear assembly in this utility model;

[0017] Figure 4 This is a schematic diagram of the structure of transmission component one and transmission component two in this utility model.

[0018] In the diagram: 1. Housing; 101. Bottom shell; 102. Top shell; 2. Input shaft; 3. Output shaft; 4. Planetary gear assembly; 401. Rotating sleeve; 402. Sun gear; 403. Planetary gear; 404. Planetary gear carrier; 5. Transmission assembly one; 501. Sliding sleeve; 502. Driving end face ratchet; 503. Driven end face ratchet; 504. Baffle; 505. Spring; 6. Transmission assembly two; 601. Fixed bracket; 602. Connecting cylinder; 603. Driving bevel gear; 604. Driven bevel gear. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0020] Please see Figures 1 to 4 This utility model provides a technical solution:

[0021] A high-precision planetary gear reducer includes a housing 1, which includes a bottom shell 101 and a top shell 102 fixedly connected. An input shaft 2 and an output shaft 3 are rotatably connected to the housing 1. Two sets of parallel planetary gear assemblies 4 are arranged inside the housing 1. The two sets of planetary gear assemblies 4 have different transmission ratios. The input shaft 2 is connected to the two planetary gear assemblies 4 through two transmission components 5. The output shaft 3 is connected to the two planetary gear assemblies 4 through a transmission component 6.

[0022] In this embodiment, the planetary gear assembly 4 includes a rotating sleeve 401, which is rotatably connected to the input shaft 2. A sun gear 402 is fixedly connected to the rotating sleeve 401. The sun gear 402 meshes with three planetary gears 403 evenly distributed on the outer side. The three planetary gears 403 are all rotatably connected to a planetary gear carrier 404, which is mounted on the transmission assembly 6. The three planetary gears 403 also mesh with a fixed internal gear ring, which is fixedly connected inside the housing 1.

[0023] In this embodiment, the transmission assembly 5 includes a sliding sleeve 501, which is slidably connected to the input shaft 2. One end of the sliding sleeve 501 is fixedly connected to a driving end face ratchet 502, and one end of the rotating sleeve 401 is fixedly connected to a driven end face ratchet 503. The driving end face ratchet 502 and the driven end face ratchet 503 are opposite to each other. A baffle 504 is fixedly connected to the input shaft 2, and a spring 505 is fixedly connected between the driving end face ratchet 502 and the baffle 504. Under the elastic force of the spring 505, the driving end face ratchet 502 is engaged with the driven end face ratchet 503.

[0024] In this embodiment, no matter what angle the active end face ratchet 502 and the driven end face ratchet 503 slip to, the spring 505 will push the active end face ratchet 502 to abut against the driven end face ratchet 503. After the active end face ratchet 502 rotates in the opposite direction, the active end face ratchet 502 can directly drive the driven end face ratchet 503 that is engaged with it to rotate, ensuring stable transmission.

[0025] In this embodiment, the transmission directions of the two transmission components 5 are opposite. When the input shaft 2 rotates, one of the transmission components 5 can rotate the corresponding sun gear 402, while the other cannot.

[0026] In this embodiment, the transmission assembly 6 includes two fixed supports 601, which are symmetrically fixedly connected to the housing 1. Two connecting cylinders 602 are symmetrically fixedly connected to the two fixed supports 601. A planetary gear carrier 404 is fixedly connected to one end of the connecting cylinder 602, and a driving bevel gear 603 is fixedly connected to the other end of the connecting cylinder 602. A driven bevel gear 604 is fixedly connected to the end of the output shaft 3, and the driven bevel gear 604 meshes with the two driving bevel gears 603.

[0027] In this embodiment, when the input shaft 2 rotates in the forward direction, the planetary gear carrier 404 rotates in the forward direction, and the rotation direction of the output shaft 3 is set to the forward direction. When the input shaft 2 rotates in the reverse direction, the planetary gear carrier 404 rotates in the reverse direction. Due to the different meshing positions of the driving bevel gear 603 and the driven bevel gear 604, the transmission between the driving bevel gear 603 and the driven bevel gear 604 will change the rotation direction, so that the output shaft 3 still rotates in the forward direction.

[0028] In this embodiment, the two connecting cylinders 602 are rotatably connected to the input shaft 2.

[0029] The working process of this high-precision planetary gear reducer is as follows:

[0030] In use, the input shaft 2 outside the housing 1 is fixedly connected to the output shaft 3 of the drive motor. When the drive motor is started, the drive motor drives the input shaft 2 to rotate. When the input shaft 2 rotates, the sliding sleeve 501 that is slidably connected to the input shaft 2 will also rotate synchronously. One of the sliding sleeves 501 can drive the rotating sleeve 401 and the sun gear 402 to rotate through the engaging active end face ratchet 502 and driven end face ratchet 503. The active end face ratchet 502 and driven end face ratchet 503 on the other sliding sleeve 501 will slip, and the two cannot transmit power.

[0031] When the sun gear 402 rotates, it can drive the planet gear 403 that meshes with it to rotate on the planet carrier 404. Since the planet gear 403 also meshes with the fixed internal gear ring, the rotation of the planet gear 403 will drive the planet carrier 404 to rotate. The planet carrier 404 will then drive the driving bevel gear 603 to rotate through the connecting sleeve. The driving bevel gear 603 will drive the output shaft 3 to rotate through the driven bevel gear 604 that meshes with it.

[0032] When it is necessary to change the reduction ratio of the reducer, first turn off the drive motor, then turn on the drive motor and make the drive motor rotate in reverse. After the input shaft 2 rotates in reverse, the previously able transmission component 5 can no longer transmit, and the previously unable transmission component 5 can transmit, causing another sun gear 402, which is different from the previous one, to be driven to rotate, and finally drive the output shaft 3 to rotate. At this time, the planetary gear assembly 4 participating in the transmission is different from the previous one, which causes the transmission ratio of the reducer to change.

[0033] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A high-precision planetary gear reducer, comprising a housing (1), wherein the housing (1) comprises a bottom shell (101) and a top shell (102) fixedly connected, characterized in that: An input shaft (2) and an output shaft (3) are rotatably connected to the housing (1). Two sets of parallel planetary gear assemblies (4) are provided inside the housing (1). The transmission ratios of the two sets of planetary gear assemblies (4) are different. The input shaft (2) is connected to the two planetary gear assemblies (4) through two transmission components (5). The output shaft (3) is connected to the two planetary gear assemblies (4) through transmission components (6).

2. The high-precision planetary gear reducer according to claim 1, characterized in that: The planetary gear assembly (4) includes a rotating sleeve (401) which is rotatably connected to the input shaft (2). A sun gear (402) is fixedly connected to the rotating sleeve (401). The sun gear (402) meshes with three planetary gears (403) evenly distributed on the outer side. The three planetary gears (403) are all rotatably connected to the planetary gear carrier (404). The planetary gear carrier (404) is set on the transmission assembly (6). The three planetary gears (403) also mesh with a fixed internal gear ring which is fixedly connected inside the housing (1).

3. A high-precision planetary gear reducer according to claim 2, characterized in that: The transmission assembly (5) includes a sliding sleeve (501), which is slidably connected to the input shaft (2). One end of the sliding sleeve (501) is fixedly connected to a driving end face ratchet (502), and one end of the rotating sleeve (401) is fixedly connected to a driven end face ratchet (503). The driving end face ratchet (502) and the driven end face ratchet (503) are opposite to each other. A baffle (504) is fixedly connected to the input shaft (2), and a spring (505) is fixedly connected between the driving end face ratchet (502) and the baffle (504). Under the elastic force of the spring (505), the driving end face ratchet (502) is engaged with the driven end face ratchet (503).

4. A high-precision planetary gear reducer according to claim 3, characterized in that: The two transmission components (5) have opposite transmission directions. When the input shaft (2) rotates, one of the transmission components (5) can rotate the corresponding sun gear (402), while the other cannot.

5. A high-precision planetary gear reducer according to claim 2, characterized in that: The transmission assembly 2 (6) includes two fixed brackets (601), which are symmetrically fixedly connected inside the housing (1). Two connecting cylinders (602) are symmetrically fixedly connected to the two fixed brackets (601). A planetary gear carrier (404) is fixedly connected to one end of the connecting cylinder (602), and a driving bevel gear (603) is fixedly connected to the other end of the connecting cylinder (602). A driven bevel gear (604) is fixedly connected to the end of the output shaft (3), and the driven bevel gear (604) meshes with the two driving bevel gears (603).

6. A high-precision planetary gear reducer according to claim 5, characterized in that: The two connecting cylinders (602) are rotatably connected to the input shaft (2).

Images