Planet carrier assembly

Abstract

The utility model relates to the technical field of speed reducers, and particularly discloses a planet carrier assembly which comprises a planet carrier and a plurality of planet wheels, the planet wheels are arranged on the planet carrier in a surrounding mode, a plurality of installation grooves are formed in the side wall of the planet carrier in the radial direction, a shaft hole is formed in the center of the planet carrier in a penetrating mode, and the installation grooves are communicated with the shaft hole. Mounting holes are formed in the parts, located in the mounting grooves, of the planet carriers in a penetrating mode, the multiple mounting holes are parallel to the shaft hole, planet wheel shafts are arranged in the mounting holes in a penetrating mode, and the planet wheels are rotationally arranged on the planet wheel shafts and located in the mounting grooves; a plurality of lock holes are formed in the side wall of the planet carrier in the circumferential direction in an array mode, the lock holes are formed in the radial direction of the planet carrier, pin holes are formed in the planet wheel shafts in the radial direction of the planet wheel shafts, and the lock pins penetrate through the lock holes and the pin holes. The planet carrier assembly solves the problems that a traditional planet carrier assembly is complex in system structure, tedious in assembly, low in efficiency, high in workpiece precision requirement and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of reducers, and in particular to a planetary carrier assembly. Background Art

[0002] The first-stage planetary carrier assembly system of the reducer is widely used in travel reducers. It is the first-stage reducer system of the reducer with a relatively high speed. It is the core component of the reducer. Usually, the planetary carrier assembly system is a three-star structure.

[0003] In traditional reducer assembly systems, the planetary gear axles and the primary planetary carrier are integrally constructed. The planetary gears are mounted on the primary carrier's axles via sleeves, with the sleeves and planetary gears positioned by a cover plate, which is secured to the carrier with countersunk screws. Stable sleeve placement on the axles requires high machining precision for both the sleeves and the axles. However, the integrated axles on the primary carrier are complex and difficult to manufacture. Furthermore, the planetary carrier assembly system is complex, making assembly cumbersome and inefficient. Utility Model Content

[0004] The purpose of the utility model is to provide a planetary carrier assembly, which solves the problems of the traditional planetary carrier assembly, such as complex system structure, cumbersome assembly, low efficiency and high workpiece precision requirements.

[0005] The utility model is realized by the following technical solutions: a planet carrier assembly, comprising a planet carrier and a plurality of planetary gears, wherein the plurality of planetary gears are arranged around the planet carrier, a plurality of mounting grooves are radially opened on the side wall of the planet carrier, an axial hole is opened through the center of the planet carrier, and the mounting groove is connected to the axial hole;

[0006] The portion of the planet carrier located in the mounting groove is penetrated by mounting holes, and a plurality of the mounting holes are parallel to the shaft hole. A planetary gear shaft is passed through the mounting holes, and the planetary gear is rotatably arranged on the planetary gear shaft. The planetary gear is located in the mounting groove;

[0007] It also includes a locking pin. A plurality of locking holes are arranged in a circumferential array on the side wall of the planet carrier. The locking holes are arranged radially along the planet carrier. Pin holes are arranged radially on the planetary axle. The locking pin is inserted into the lock hole and the pin hole.

[0008] Furthermore, the locking pin is a spring pin.

[0009] Furthermore, the locking pin is threadably engaged with the locking hole.

[0010] Furthermore, a positioning groove is provided on the inner wall of the mounting hole, and a positioning block is provided on the side wall of the planetary axle. When the planetary axle is installed in the mounting hole, the lock hole and the pin hole are aligned by engaging the positioning block with the positioning groove.

[0011] Furthermore, the notch of the positioning groove is provided with a flared opening.

[0012] Furthermore, a cone head is provided at one end of the positioning block close to the bottom of the positioning groove.

[0013] Furthermore, it also includes a gasket and a bearing, wherein the bearing is sleeved on the portion of the planetary gear shaft located in the mounting groove, and the planetary gear is sleeved on the bearing;

[0014] The planetary gear shaft is also sleeved with two washers, which are respectively in contact with two sides of the bearing.

[0015] The technical solution of the utility model has at least the following advantages and beneficial effects:

[0016] 1. Insert the planetary gear shaft from one side of the mounting hole, then pass it through the gasket, bearing and gasket in the mounting groove in sequence, and then pass it out from the other side of the mounting hole. Then insert the locking pin into the lock hole and pin hole. The locking pin fixes the planetary gear shaft to the planetary carrier, thereby providing a good rotation foundation for the planetary gear, meeting the use strength while having a simple overall structure and convenient and quick installation.

[0017] 2. The flaring can facilitate the positioning block to be quickly aligned with the positioning groove, and then smoothly enter the positioning groove. At the same time, a cone head can be provided at one end of the positioning block close to the bottom of the positioning groove, which is also convenient for the positioning block to be quickly docked with the positioning groove, thereby aligning the pin hole with the lock hole. At the same time, when the positioning block is completely placed in the positioning groove, the planetary axle can also be limited to prevent it from excessive or insufficient axial movement when it is coaxially docked with the mounting hole, which greatly facilitates the installation of the planetary axle, has a simple structure and improves the overall installation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 A schematic diagram of the internal structure of a planet carrier assembly provided by the present utility model;

[0020] Figure 2 for Figure 1 A magnified schematic diagram of the structure at A in the middle;

[0021] Icons: 1. Planet carrier, 11. Mounting slot, 12. Shaft hole, 13. Mounting hole, 14. Lock hole, 15. Positioning slot, 16. Flaring, 2. Planet gear, 3. Planet gear shaft, 31. Pin hole, 32. Positioning block, 33. Cone head, 4. Lock pin, 5. Gasket, 6. Bearing. DETAILED DESCRIPTION

[0022] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0023] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are also within the scope of protection of the present invention.

[0024] Reference Figures 1 to 2 As shown, this embodiment provides a planetary carrier assembly, including a planetary carrier 1 and a plurality of planetary gears 2, wherein the plurality of planetary gears 2 are arranged around the planetary carrier 1, and a plurality of mounting grooves 11 are radially opened on the side wall of the planetary carrier 1, and an axial hole 12 is opened through the center of the planetary carrier 1, and the mounting groove 11 is connected to the axial hole 12, thereby ensuring that the planetary gears 2 can mesh with the sun gear in the axial hole 12 for transmission.

[0025] More specifically, Figure 1 As shown, the part of the planet carrier 1 located in the mounting groove 11 is penetrated by a mounting hole 13, and several mounting holes 13 are parallel to the shaft hole 12, and then several mounting holes 13 are arranged in a circumferential array along the shaft hole 12. At the same time, a planet shaft 3 is passed through the mounting hole 13, and the planetary gear 2 is rotatably set on the planet shaft 3, and the planetary gear 2 is located in the mounting groove 11; it also includes a gasket 5 and a bearing 6, the bearing 6 is sleeved on the part of the planet shaft 3 located in the mounting groove 11, and the planetary gear 2 is sleeved on the bearing 6, and then is rotatably connected to the planet shaft 3 through the bearing 6; two gaskets 5 are also sleeved on the planet shaft 3, and the two gaskets 5 are respectively abutted against the two sides of the bearing 6 for protecting the bearing 6 and limiting the bearing 6, thereby limiting the position of the planetary gear 2 in the mounting groove 11 to avoid friction between the planetary gear 2 and the inner wall of the mounting groove 11.

[0026] like Figure 1 As shown, it also includes a locking pin 4. A plurality of locking holes 14 are arranged in a circumferential array on the side wall of the planet carrier 1. The locking holes 14 are arranged along the radial direction of the planet carrier 1. Pin holes 31 are provided on the planetary shaft 3 along its radial direction. The locking pin 4 is inserted into the locking holes 14 and the pin holes 31. In specific implementation, it is only necessary to insert the planetary shaft 3 from one side of the mounting hole 13, then pass through the gasket 5, bearing 6 and gasket 5 located in the mounting groove 11 in sequence, and then pass out from the other side of the mounting hole 13. The locking pin 4 is then inserted into the locking hole 14 and the pin hole 31. The planetary shaft 3 is fixed to the planet carrier 1 by the locking pin 4, thereby providing a good rotation foundation for the planetary gear 2. While meeting the use strength, the overall structure is simple and the installation is convenient and quick.

[0027] More specifically, Figure 1 and 2 As shown, a positioning groove 15 is provided on the inner wall of the mounting hole 13, and a positioning block 32 is provided on the side wall of the planetary shaft 3. When the planetary shaft 3 is installed in the mounting hole 13, the locking hole 14 is aligned with the pin hole 31 by engaging the positioning block 32 with the positioning groove 15. In a specific implementation, the notch of the positioning groove 15 is provided with a flared opening 16. The flared opening 16 can facilitate the positioning block 32 to quickly align with the positioning groove 15 and then smoothly enter the positioning groove 15. At the same time, a cone head 33 can be provided at one end of the positioning block 32 near the bottom of the positioning groove 15 to facilitate the rapid docking of the positioning block 32 with the positioning groove 15 and thus align the pin hole 31 with the locking hole 14. At the same time, when the positioning block 32 is fully placed in the positioning groove 15, it can also limit the planetary shaft 3 to prevent it from excessive or insufficient axial movement when coaxially docking with the mounting hole 13. This greatly facilitates the installation of the planetary shaft 3, has a simple structure, and improves the overall installation efficiency.

[0028] As one of the embodiments, the locking pin 4 is a spring pin, which is a headless hollow cylindrical body with an axial groove and chamfered ends. It has good elasticity and shear resistance. The outer diameter of the spring pin is slightly larger than the aperture of the locking hole 14 and the pin hole 31. Therefore, the friction between the spring pin and the locking hole 14 and the pin hole 31 is greater than the centrifugal force of the spring pin when the planetary carrier 1 rotates, and it will not detach from the locking hole 14 and the pin hole 31, thereby ensuring that the planetary gear shaft 3 is always in the mounting hole 13 and will not detach.

[0029] As another embodiment, the locking pin 4 is threadedly engaged with the locking hole 14; similarly, it also prevents the locking pin 4 from escaping from the locking hole 14 and the pin hole 31, ensuring that the planetary gear shaft 3 is always in the mounting hole 13 and will not escaping, providing a good rotation basis for the planetary gear 2.

[0030] The planetary gear shaft 3 is made of 20CrMnTi and undergoes a heat treatment of carburizing and quenching, resulting in superior strength compared to the transmission structure. This planetary carrier assembly eliminates components such as sleeves and covers, significantly reducing costs. While maintaining structural strength and practical requirements, it also features a simple structure and quick and easy installation, significantly improving production efficiency.

[0031] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A planet carrier assembly, comprising a planet carrier (1) and a plurality of planetary gears (2), wherein the plurality of planetary gears (2) are arranged around the planet carrier (1), and characterized in that: A plurality of mounting grooves (11) are radially provided on the side wall of the planetary carrier (1), an axial hole (12) is provided through the center of the planetary carrier (1), and the mounting grooves (11) are in communication with the axial hole (12); The planetary frame (1) is provided with mounting holes (13) through the portion of the mounting groove (11), and a plurality of the mounting holes (13) are parallel to the shaft hole (12). A planetary gear shaft (3) is passed through the mounting holes (13), and the planetary gear (2) is rotatably arranged on the planetary gear shaft (3). The planetary gear (2) is located in the mounting groove (11); The planetary carrier (1) further comprises a locking pin (4), a plurality of locking holes (14) are arranged in a circumferential array on the side wall of the planetary carrier (1), the locking holes (14) are arranged radially along the planetary carrier (1), a pin hole (31) is arranged radially on the planetary gear shaft (3), and the locking pin (4) is inserted into the locking hole (14) and the pin hole (31).

2. A planet carrier assembly according to claim 1, characterized in that: The locking pin (4) is a spring pin.

3. The planet carrier assembly according to claim 1, characterized in that: The locking pin (4) is threadably engaged with the locking hole (14).

4. A planet carrier assembly according to claim 2 or 3, characterized in that: A positioning groove (15) is provided on the inner wall of the mounting hole (13), and a positioning block (32) is provided on the side wall of the planetary shaft (3). When the planetary shaft (3) is installed in the mounting hole (13), the locking hole (14) and the pin hole (31) are aligned by engaging the positioning block (32) with the positioning groove (15).

5. The planet carrier assembly according to claim 4, characterized in that: The notch of the positioning groove (15) is provided with a flared opening (16).

6. The planet carrier assembly according to claim 4, characterized in that: A cone head (33) is provided at one end of the positioning block (32) close to the bottom of the positioning groove (15).

7. The planet carrier assembly according to claim 4, characterized in that: It also includes a gasket (5) and a bearing (6), wherein the bearing (6) is sleeved on the portion of the planetary gear shaft (3) located in the mounting groove (11), and the planetary gear (2) is sleeved on the bearing (6); The planetary gear shaft (3) is also sleeved with two washers (5), and the two washers (5) are respectively in contact with two sides of the bearing (6).

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