Planetary gear reducer

Abstract

The utility model provides a kind of planetary gear reducer, belong to the technical field of speed reducer.It solves the problem of unstable planet carrier in prior art.The utility model includes shell, planet wheel body, sun gear, planet carrier, inner ring gear, output shaft and sealing end cover, shell is the cylindrical structure of one side opening, support ring body is formed in shell interior, several support platform bodies are evenly formed in support ring body, first bolt hole is arranged in support platform body, outlet and several first bearing holes are arranged in shell interior, first bearing hole is evenly circumferential array in the outside of outlet and first bearing is installed in first bearing hole, planet shaft one end is connected with first bearing, several second bearing holes are arranged in planet carrier interior, second bearing is installed in second bearing hole and planet shaft other end is connected with second bearing.The utility model has the advantages of stable connection structure, higher structural strength.

Description

Technical Field

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

[0002] A planetary gear reducer is a high-efficiency transmission device. When working, the sun gear inputs power, which drives the planet gears to rotate around it. At the same time, the planet gears roll along the internal gear ring. The power is output through the planet carrier, realizing speed reduction and torque increase.

[0003] Chinese patent publication number CN207213051U discloses a planetary gear reducer, including a housing, an input shaft and an output shaft respectively disposed at both ends of the housing, and a planetary gear reduction mechanism disposed within the housing. A first sun gear is integrally disposed with the input shaft, a first planetary shaft is disposed parallel to the input shaft on a first planetary carrier, a first planetary gear is rotatably sleeved on the first planetary shaft and meshes with the first sun gear, a first internal gear is disposed on the housing and meshes with the first planetary gear, one end of the first planetary carrier is provided with internal teeth, one end of the sun shaft is provided with external teeth that mesh with the internal teeth of the first planetary carrier, a second sun gear is disposed on the sun shaft, and a second planetary shaft is disposed parallel to the sun shaft on a second planetary carrier.

[0004] The patent provides a planetary gear reducer in which the planet carrier is not equipped with a structural device for fixing, which leads to instability and potential hazards in actual use. Utility Model Content

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

[0006] The objective of this utility model can be achieved through the following technical solution: A planetary gear reducer includes a housing, planetary gear bodies, a sun gear, a planet carrier, an internal gear ring, an output shaft, and a sealing end cap. The housing has a cylindrical structure with one side opening. A support ring is formed inside the housing, and several support platforms are uniformly formed in the support ring. A first bolt hole is provided in each support platform. An output port and several first bearing holes are provided inside the housing. The first bearing holes are uniformly arranged circumferentially outside the output port, and a first bearing is installed in each of the first bearing holes. The planetary gear body is a one-piece molded structure and includes a front planetary gear, a rear planetary gear, and a planetary shaft. One end of the planetary shaft is connected to a first bearing. Several second bearing holes are opened inside the planetary carrier. Second bearings are installed in the second bearing holes, and the other end of the planetary shaft is connected to the second bearings. The front end of the planetary carrier is connected to the planetary shaft between the front and rear planetary gears. The front planetary gear is located outside the planetary carrier. The sun gear has a double columnar gear structure. The sun gear has a through hole inside and is sleeved on the output shaft. The sun gear is meshed with the rear planetary gear.

[0007] In the aforementioned planetary gear reducer, the internal gear ring is sleeved outside the planetary gear body and meshes with the rear planetary gear. The internal gear ring has a one-sided closed structure, and a connecting shaft seat is provided on the closed side of the internal gear ring. One end of the output shaft passes through the connecting shaft seat and is connected to the connecting shaft seat.

[0008] In the aforementioned planetary gear reducer, a plurality of limiting grooves are evenly provided in the support ring body, the limiting grooves are located between the support platform bodies, and a plurality of limiting protrusions are formed on the front side of the planet carrier, the limiting protrusions correspond to the limiting grooves and extend into the limiting grooves to fit together.

[0009] In the aforementioned planetary gear reducer, an extended protrusion is formed at the outer end of the housing outside the first bearing hole, a bearing seat is formed at the center of the outer side of the housing, a third bearing is provided in the output port, the sun gear passes through the third bearing and extends out of the housing, and a sealing ring cover is fixedly connected to the outer side of the bearing seat.

[0010] In the aforementioned planetary gear reducer, the planet carrier is provided with a plurality of second bolt holes, and fastening bolts are inserted and fixed in the first bolt holes and the second bolt holes.

[0011] In the aforementioned planetary gear reducer, the sealing end cover is fixedly connected to the opening side of the housing. A plurality of positioning protrusions are formed on one side surface of the sealing end cover, and a positioning groove is provided on the opening side surface of the housing. The positioning protrusions and the positioning groove correspond to each other and fit together.

[0012] In the aforementioned planetary gear reducer, the output shaft passes through the planet carrier, and a fourth bearing is sleeved and connected to the connection between the output shaft and the planet carrier.

[0013] Compared with the prior art, the planetary gear reducer provided by this utility model has the following beneficial effects: 1. Through the integrated structural design inside the housing, the support ring can support the planetary carrier through the support platform, avoiding the transmission of impact to the inner wall of the housing when the planetary carrier is under force, reducing housing deformation. The limiting groove of the support ring and the limiting protrusion of the planetary carrier are precisely fitted, strictly limiting the radial runout of the planetary carrier in the housing, and ensuring the coaxiality of the planetary carrier and the housing; 2. One end of the planetary shaft is positioned by the first bearing of the housing, and the other end is supported by the second bearing of the planetary carrier, forming a stable structure with fixed ends, enhancing the radial stiffness of the planetary shaft, and avoiding radial movement when the planetary gears rotate. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the exploded structure of this utility model; Figure 3 This is a schematic diagram of the internal structure of the shell.

[0015] In the diagram: 1. Housing; 11. Support ring; 111. Limiting groove; 12. Support platform; 121. First bolt hole; 13. First bearing hole; 14. Output port; 15. Extension protrusion; 16. Bearing seat; 17. Positioning groove; 2. Planetary gear body; 21. Front planetary gear; 22. Rear planetary gear; 23. Planetary shaft; 231. First bearing; 232. Second bearing; 3. Sun gear; 31. Third bearing; 4. Planet carrier; 41. Second bearing hole; 42. Limiting protrusion; 5. Internal gear ring; 51. Connecting shaft seat; 6. Output shaft; 61. Fourth bearing; 7. Sealing end cover; 71. Positioning protrusion; 8. Sealing ring cover; 9. Fastening bolt. Detailed Implementation

[0016] 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.

[0017] like Figures 1 to 3 As shown, this embodiment includes a housing 1, a planetary gear body 2, a sun gear 3, a planet carrier 4, an internal gear ring 5, an output shaft 6, and a sealing end cap 7. The housing 1 has a cylindrical structure with an opening on one side and a support ring 11 formed inside. The support ring 11 surrounds the outer periphery of the inner side of the housing 1. Several support platforms 12 are evenly distributed in the support ring 11. The housing 1 also has an output port 14 and several first bearing holes 13 inside. The first bearing holes 13 are evenly arrayed on the outside of the output port 14 in the circumferential direction, and a first bearing 231 is installed in the first bearing hole 13 to ensure transmission stability.

[0018] like Figures 1 to 3 As shown, the planetary gear body 2 is a one-piece molded structure, including a front planetary gear 21, a rear planetary gear 22, and a planetary shaft 23. One end of the planetary shaft 23 is connected to a first bearing 231 to achieve rotational engagement with the housing 1. The planetary carrier 4 has several second bearing holes 41 inside, and second bearings 232 are installed in the second bearing holes 41. The other end of the planetary shaft 23 is connected to the second bearings 232, forming a double-end support structure. The front end of the planetary carrier 4 is connected to the planetary shaft 23 located between the front planetary gear 21 and the rear planetary gear 22. The connection is as follows: the front planetary gear 21 is located outside the planet carrier 4 to optimize the spatial layout; the sun gear 3 is designed as a double columnar gear structure with a through hole inside and is sleeved on the output shaft 6; the sun gear 3 meshes with the rear planetary gear 22 to achieve efficient power transmission; the internal gear ring 5 is sleeved on the outside of the planetary gear body 2 and meshes with the rear planetary gear 22; the internal gear ring 5 has a closed structure on one side, and a connecting shaft seat 51 is provided on the closed side; one end of the output shaft 6 passes through the connecting shaft seat 51 and is rotatably connected to it to enhance the support strength of the output end.

[0019] like Figures 2 to 3 As shown, a plurality of limiting grooves 111 are evenly provided in the support ring 11, and the limiting grooves 111 are located between the support platform 12. Correspondingly, a plurality of limiting protrusions 42 are formed on the front side of the planetary carrier 4. The limiting protrusions 42 are matched with the limiting grooves 111 and extend into the limiting grooves 111 to fit tightly. The concave and convex fit achieves precise positioning and prevents the planetary carrier 4 from rotating and deviating.

[0020] like Figures 2 to 3 As shown, the sealing end cap 7 is fixedly connected to the opening side of the housing 1. Several positioning protrusions 71 are formed on the surface of the sealing end cap 7, and a positioning groove 17 is provided on the surface of the opening side of the housing 1. The positioning protrusions 71 and the positioning groove 17 are in corresponding positions and fit together to ensure the accurate installation of the sealing end cap 7 and enhance the sealing effect.

[0021] To elaborate further, such as Figures 1 to 2 As shown, an extended protrusion 15 is formed on the outer end of the housing 1 outside the first bearing hole 13. A bearing seat 16 is provided at the center of the outer side of the housing 1. A third bearing 31 is installed in the output port 14. The sun gear 3 passes through the third bearing 31 and extends out of the housing 1. A sealing ring cover 8 is fixedly connected to the outer side of the bearing seat 16, which ensures smooth rotation and effective sealing.

[0022] To elaborate further, such as Figures 1 to 3 As shown, each support platform 12 has a first bolt hole 121, and the planetary carrier 4 has several second bolt holes. Fastening bolts 9 are inserted and fixed in both the first bolt hole 121 and the second bolt holes. The planetary carrier 4 and the shell 1 are stably assembled by bolt connection, thereby improving the overall structural rigidity.

[0023] To elaborate further, such as Figures 1 to 2 As shown, the output shaft 6 passes through the planetary carrier 4, and a fourth bearing 61 is sleeved on the outside of the connection between the output shaft 6 and the planetary carrier 4. The bearing reduces rotational friction and improves transmission efficiency and service life.

[0024] 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.

[0025] 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 gear reducer comprising a housing (1), a planetary wheel body (2), a sun gear (3), a planet carrier (4), an inner ring gear (5), an output shaft (6) and a sealing end cover (7), characterized in that: The housing (1) is a cylindrical structure with an opening on one side. A support ring (11) is formed inside the housing (1). Several support platforms (12) are uniformly formed in the support ring (11). A first bolt hole (121) is provided in the support platform (12). An output port (14) and several first bearing holes (13) are provided inside the housing (1). The first bearing holes (13) are evenly arranged in a circular array outside the output port (14), and a first bearing (231) is installed in the first bearing hole (13). The planetary gear body (2) is an integrally formed structure and includes a front planetary gear (21), a rear planetary gear (22), and a planetary shaft (23). The planetary shaft (23) is... 3) One end is connected to the first bearing (231). The planetary carrier (4) has several second bearing holes (41) inside. The second bearing holes (41) are equipped with second bearings (232) and the other end of the planetary shaft (23) is connected to the second bearings (232). The front end of the planetary carrier (4) is connected to the planetary shaft (23) between the front planetary gear (21) and the rear planetary gear (22). The front planetary gear (21) is located outside the planetary carrier (4). The sun gear (3) has a double columnar gear structure. The sun gear (3) has a through hole inside and is sleeved on the output shaft (6). The sun gear (3) is meshed with the rear planetary gear (22).

2. A planetary gear reducer according to claim 1, characterized in that: The internal gear ring (5) is sleeved on the outside of the planetary gear body (2) and meshes with the rear planetary gear. The internal gear ring (5) has a closed structure on one side and a connecting shaft seat (51) is provided on the closed side of the internal gear ring (5). One end of the output shaft (6) passes through the connecting shaft seat (51) and is connected to the connecting shaft seat (51).

3. A planetary gear reducer according to claim 1, characterized in that: The support ring (11) is provided with a plurality of limiting grooves (111) evenly distributed between the support platform (12). The planetary carrier (4) is provided with a plurality of limiting protrusions (42) on its front side. The limiting protrusions (42) correspond to the limiting grooves (111) and extend into the limiting grooves (111) to fit together.

4. A planetary gear reducer according to claim 1, characterized in that: An extension protrusion (15) is formed at the outer end of the housing (1) outside the first bearing hole (13). A bearing seat (16) is formed at the center of the outer side of the housing (1). A third bearing (31) is provided in the output port (14). The sun gear (3) passes through the third bearing (31) and extends out of the housing (1). A sealing ring cover (8) is fixedly connected to the outer side of the bearing seat (16).

5. A planetary gear reducer according to claim 1, characterized in that: The planetary carrier (4) has several second bolt holes, and fastening bolts (9) are inserted and fixed in the first bolt hole (121) and the second bolt hole.

6. A planetary gear reducer according to claim 1, characterized in that: The sealing end cap (7) is fixedly connected to the opening side of the housing (1). A plurality of positioning protrusions (71) are formed on one side surface of the sealing end cap (7). A positioning groove (17) is provided on the opening side surface of the housing (1). The positioning protrusions (71) and the positioning groove (17) correspond to each other and fit together.

7. A planetary gear reducer according to claim 1, characterized in that: The output shaft (6) penetrates through the planet carrier (4), and the fourth bearing (61) is connected outside the connection position of the output shaft (6) and the planet carrier (4).

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