Planetary reduction gear

Abstract

The utility model provides a kind of planetary reducer belongs to speed reducer technical field.It solves the problem of insufficient stability of internal connection in prior art.The utility model's speed reducer shell side is equipped with shell end cover and speed reducer shell is installed in and input shaft and planetary assembly outside, fixed hole and connecting hole are opened in planet carrier, fixed bolt is fixed in fixed hole, planetary axle is connected in double-stage planetary gear inside and is installed in planet carrier inside by passing through connecting hole, first fastening hole is opened in one end of planetary axle, second fastening hole is opened in the place close to end portion of planet carrier, first fastening pin is installed in first fastening hole and second fastening hole, first inner gear ring and second inner gear ring are respectively engaged with the outside of the two sides of double-stage planetary gear connection.The utility model has the advantages of stable connection structure, high transmission precision and efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of speed reducer technology and relates to a planetary speed reducer. Background Technology

[0002] Planetary gear reducers, as key components of power transmission, are based on planetary gear drives. They can reduce speed and increase torque, and have characteristics such as high precision and high efficiency. They are widely used in industrial automation and other fields.

[0003] Chinese patent publication number CN213206460U discloses a planetary gear reducer, including a rear body, a first-stage planetary gear, a planetary gear carrier, a second-stage planetary gear, an output bearing, a rear end cover, a housing, a spur internal gear ring, a washer, and a helical internal gear seat. The first-stage planetary gear is rotatably connected to the front end of the planetary gear carrier, and the front end of the first-stage planetary gear is in contact with the washer. The washer is in contact with the rear end of the helical internal gear seat, which is rotatably connected to the front end of the rear body. The second-stage planetary gear is rotatably connected to the front end of the output bearing, and the front end of the output bearing is rotatably connected inside the housing. The front end of the housing is in contact with the rear body, and the rear end of the output bearing is rotatably connected to the rear end cover. The rear end cover is fixedly connected to the front end of the rear body. A transmission sun gear is provided at the rear end of the planetary gear carrier, and the transmission sun gear meshes with the second-stage planetary gear.

[0004] In a planetary reducer provided by this patent, the rotating connection part is not equipped with an axial or radial limiting structure, which causes the bearing to move during operation, thereby affecting the meshing accuracy and output stability of the second-stage planetary gear. Utility Model Content

[0005] The purpose of this invention is to address the aforementioned problems in the existing technology by providing a planetary speed reducer.

[0006] The objective of this utility model can be achieved through the following technical solution: A planetary reducer includes a reducer housing, an input shaft, and a planetary assembly. A housing end cover is installed on one side of the reducer housing, and the reducer housing is mounted outside the input shaft and the planetary assembly. The planetary assembly includes a planet carrier, a two-stage planetary gear, a sun gear shaft, a first internal gear ring, and a second internal gear ring. The planet carrier has a fixing hole and a connecting hole. A fastening bolt passes through the fixing hole. A planetary shaft passes through the connecting hole to connect the two-stage planetary gear, thus installing the two-stage planetary gear inside the planet carrier. A first fastening hole is provided at one end of the planetary shaft. A second fastening hole is provided near the end of the frame. A first fastening pin is installed through the first and second fastening holes. The first and second internal gear rings are respectively meshed with the two sides of the double-stage planetary gear. A shaft head is formed at one end of the input shaft. Several first fastening grooves are provided on the outside of the shaft head. The first internal gear ring is a variable-diameter cylindrical shape and is open on both sides. A connecting groove is formed on the side of the first internal gear ring with a smaller diameter. Several second fastening grooves are provided on the inside of the first internal gear ring. The shaft head extends into the inside of the first internal gear ring and the first and second fastening grooves are correspondingly arranged. A second fastening pin is installed through the first and second fastening grooves.

[0007] In the aforementioned planetary reducer, a first sealing end cover and a second sealing end cover are fixedly connected to one side of the reducer housing and the middle part of the housing end cover, respectively.

[0008] In the aforementioned planetary reducer, the sun gear shaft passes through the second sealing end cover and a sun gear ring is provided outside the sun gear shaft. The sun gear ring meshes with a two-stage planetary gear, and the input shaft passes through the first sealing end cover.

[0009] In the aforementioned planetary reducer, a placement groove is formed on the outer side of the fixing hole of the planet carrier, a bolt head is formed at one end of the fastening bolt and a nut is fixed at the other end of the fastening bolt, and the bolt head and nut are located in the placement groove.

[0010] Compared with the prior art, the planetary reducer provided by this utility model has the following beneficial effects: 1. The planetary shaft is fixed to the planetary carrier by a first fastening pin in conjunction with a first fastening hole and a second fastening hole. The input shaft head and the first internal gear ring are connected by a second fastening pin in conjunction with a first fastening groove and a second fastening groove. In addition, the planetary carrier is fixed by fastening bolts. The multiple positioning and fastening structure effectively avoids loosening or relative slippage during transmission, enhances the rigidity and connection reliability of the overall structure, and reduces vibration and noise; 2. The direct connection between the first internal gear ring and the input shaft head through the second fastening pin reduces cumulative error. The relative position of the input shaft and the first internal gear ring is more stable, ensuring output accuracy. It also eliminates the intermediate transition parts that may exist in the traditional structure, reduces power transmission links, reduces energy loss caused by the meshing of multiple parts, and improves transmission efficiency. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the exploded structure of this utility model;

[0012] Figure 2 This is a schematic diagram of the planetary carrier structure.

[0013] In the diagram: 1. Reducer housing; 2. Input shaft; 21. Shaft head; 211. First fastening groove; 3. Planetary assembly; 31. Planetary carrier; 311. Fixing hole; 312. Connecting hole; 313. Second fastening hole; 314. Placement groove; 32. Double-stage planetary gear; 33. Sun gear shaft; 331. Sun gear ring; 34. First internal gear ring; 341. Connecting groove; 342. Second fastening groove; 35. Second internal gear ring; 36. Planetary shaft; 361. First fastening hole; 4. Housing end cover; 5. Fastening bolt; 51. Nut; 6. First fastening pin; 7. Second fastening pin; 8. First sealing end cover; 9. Second sealing end cover. Detailed Implementation

[0014] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0015] like Figures 1 to 2 As shown, this embodiment includes a reducer housing 1, an input shaft 2, and a planetary assembly 3. A housing end cover 4 is bolted to one side of the reducer housing 1, and the reducer housing 1 is completely covered outside the input shaft 2 and the planetary assembly 3, forming a closed transmission space and protecting the internal components.

[0016] like Figures 1 to 2As shown, the planetary assembly 3 includes a planet carrier 31, a two-stage planetary gear 32, a sun gear shaft 33, a first internal gear ring 34, and a second internal gear ring 35. The planet carrier 31 has several fixed holes 311 and connecting holes 312 arranged in a circular array. Fastening bolts 5 pass through and are fixed in the fixed holes 311 for connecting and fixing the planet carrier 31 body. A planet shaft 36 passes through and is connected to the inside of the two-stage planetary gear 32, and the planet shaft 36 passes through the connecting holes 312, allowing the two-stage planetary gear 32 to rotatably connect. Installed inside the planetary carrier 31, the planetary shaft 36 has a first fastening hole 361 at one end, and a second fastening hole 313 is correspondingly provided near the end of the planetary carrier 31. The first fastening hole 361 and the second fastening hole 313 are arranged correspondingly and a first fastening pin 6 is installed inside them. The axial positioning of the planetary shaft 36 and the planetary carrier 31 is achieved by the pin connection. The first internal gear ring 34 and the second internal gear ring 35 are respectively meshed with the two sides of the double-stage planetary gear 32 to form a double-stage transmission structure.

[0017] like Figure 1 As shown, one end of the input shaft 2 has a shaft head 21. The shaft head 21 has several first fastening grooves 211 circumferentially formed on its outer side. The first internal gear ring 34 is a variable diameter cylindrical shape with both sides through. The end with the smaller diameter has a connecting groove 341. The inner side has several second fastening grooves 342 corresponding to the first fastening grooves 211 circumferentially formed. During assembly, the shaft head 21 extends into the interior of the first internal gear ring 34 and fits against the connecting groove 341. The first fastening grooves 211 and the second fastening grooves 342 are aligned. A second fastening pin 7 is installed between them to achieve a rigid connection between the input shaft 2 and the first internal gear ring 34.

[0018] To elaborate further, such as Figure 1 As shown, the first sealing end cover 8 and the second sealing end cover 9 are respectively fixedly connected to the middle part of one side of the reducer housing 1 and the middle part of the housing end cover 4 by bolts, which improves the overall sealing performance. The sun gear shaft 33 passes through the second sealing end cover 9, and a sun gear ring 331 is provided on its outside. The sun gear ring 331 meshes with the double-stage planetary gear 32 to form a transmission meshing pair. The input shaft 2 passes through the first sealing end cover 8 to realize the input transmission of power.

[0019] To elaborate further, such as Figures 1 to 2 As shown, the fixing holes 311 and connecting holes 312 are distributed at intervals, and the planet carrier 31 has fixing holes 311 and connecting holes 312 on both ends. The fixing holes 311 of the planet carrier 31 have placement grooves 314 formed on the outside. One end of the fastening bolt 5 has a bolt head, and the other end is screwed with a nut 51. Both the bolt head and the nut 51 are located in the placement grooves 314 to prevent the fastening bolt 5 from protruding from the surface of the planet carrier 31, making the structure more compact.

[0020] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

[0021] Although this document uses a variety of terms, the possibility of using other terms is not excluded. These terms are used merely for the convenience of describing and explaining the essence of this invention; interpreting them as any additional limitation would contradict the spirit of this invention.

Claims

1. A planetary reducer, comprising a reducer housing (1), an input shaft (2), and a planetary assembly (3), characterized in that: The reducer housing (1) is fitted with a housing end cover (4) on one side and is mounted outside the input shaft (2) and planetary assembly (3). The planetary assembly (3) includes a planet carrier (31), a double-stage planetary gear (32), a sun gear shaft (33), a first internal gear ring (34), and a second internal gear ring (35). The planet carrier (31) has a fixing hole (311) and a connecting hole (312). A fastening bolt (5) is inserted through the fixing hole (311). A planetary shaft (36) is inserted through the double-stage planetary gear (32) and connected to it. The planetary shaft (36) passes through the connecting hole (312) to install the double-stage planetary gear (32) inside the planet carrier (31). A first fastening hole (361) is provided at one end of the planetary shaft (36). A second fastening hole (313) is provided near the end of the planet carrier (31). A first fastening pin (6) is installed through a fastening hole (361) and a second fastening hole (313). The first internal gear ring (34) and the second internal gear ring (35) are respectively meshed with the two sides of the double-stage planetary gear (32). One end of the input shaft (2) is formed with a shaft head (21). Several first fastening grooves (211) are opened on the outside of the shaft head (21). The first internal gear ring (34) is a variable diameter cylindrical shape and is open on both sides. A connecting groove (341) is formed on the side of the first internal gear ring (34) with a smaller diameter. Several second fastening grooves (342) are opened on the inside of the first internal gear ring (34). The shaft head (21) extends into the inside of the first internal gear ring (34) and the first fastening grooves (211) and the second fastening grooves (342) are correspondingly arranged. Second fastening pins (7) are installed through the first fastening grooves (211) and the second fastening grooves (342).

2. The planetary reducer according to claim 1, characterized in that: The first sealing end cover (8) and the second sealing end cover (9) are fixedly connected to one side of the reducer housing (1) and the middle part of the housing end cover (4), respectively.

3. A planetary gear reducer according to claim 2, characterized in that: The sun gear shaft (33) passes through the second sealing end cover (9) and a sun gear ring (331) is provided on the outside of the sun gear shaft (33). The sun gear ring (331) meshes with the double-stage planetary gear (32). The input shaft (2) passes through the first sealing end cover (8).

4. A planetary gear reducer according to claim 1, characterized in that: The planetary carrier (31) has a placement groove (314) formed on the outside of the fixing hole (311). One end of the fastening bolt (5) has a bolt head and the other end of the fastening bolt (5) is fixed with a nut (51). The bolt head and the nut (51) are located in the placement groove (314).

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