Joint speed reducer with compact structure

Abstract

The utility model provides a joint speed reducer with a compact structure. The joint speed reducer comprises a shell, an input shaft and a planetary speed reduction assembly. The shell comprises an input end shell and an output end shell which are distributed left and right and fixedly connected; a plurality of grooves are circumferentially distributed in the left and right sides of the input end shell and the output end shell respectively; an output port is formed in the center of the right end of the output end shell; a first inner gear ring is fixed in the input end shell; a second inner gear ring is fixed in the output end shell; the planetary speed reduction assembly comprises a first sun gear, a first planet carrier, a first planet gear, a second sun gear, a second planet carrier and a second planet gear. The first planet carrier is rotationally connected into the input end shell; the right part of the input shaft is rotationally connected with the first planet carrier; the first sun gear is fixed at the right end of the input shaft; the first planet gear is mounted on the first planet carrier; the second sun gear is fixed at the right end of the first planet carrier; the right part of the second planet carrier is rotationally connected to the position of the output port; and the second planet gear is mounted on the second planet carrier.

Description

A compact joint reducer Technical Field

[0001] This utility model relates to the field of planetary gear reducer technology, and in particular to a compact joint gear reducer. Background Technology

[0002] Joint reducers have a wide range of applications, including in disc hubs and robotic arms. However, the current shortcomings of joint reducers are that the planetary reducer has many components and its structural design is not compact enough, which makes it impossible to miniaturize the product. The weight is also not light enough, which limits its use and makes it unable to meet the requirements of some environments. The stability of operation is also insufficient. Therefore, joint reducers need to be improved. Summary of the Invention

[0003] The purpose of this invention is to provide a compact articulated speed reducer to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] A compact articulated speed reducer includes a housing, an input shaft, and a planetary reduction assembly. The housing includes an input end housing and an output end housing, which are distributed and fixedly connected on the left and right sides. The input end housing has several first grooves distributed circumferentially on its left and right sides. The output end housing has several second grooves distributed circumferentially on its left and right sides. An output port is located at the center of the right end of the output end housing. A first internal gear ring is fixed inside the input end housing. A second internal gear ring is fixed inside the output end housing. The planetary reduction assembly includes a first sun gear, a first planet carrier, first planet gears, a second sun gear, a second planet carrier, and second planet gears. The planetary carrier is rotatably connected to the input end housing via a first bearing; the input shaft extends into the first planetary carrier from the left and is rotatably connected to the first planetary carrier via a second bearing; the first sun gear is located inside the first planetary carrier and fixed to the right end of the input shaft; the first planetary gear is mounted on the first planetary carrier and meshes with the first sun gear and the first internal gear ring respectively; the second sun gear is located inside the output end housing and fixed to the right end of the first planetary carrier; the second planetary carrier is located inside the output end housing and its right side is rotatably connected to the output port position via a third bearing; the second planetary gear is mounted on the second planetary carrier and meshes with the second sun gear and the second internal gear ring respectively.

[0006] Further description of this utility model: The outer circumference of the first internal gear ring is provided with a plurality of semi-circular first positioning protrusions; the input end shell has a first positioning groove that mates with the first positioning protrusions; a plurality of first clamping screws are installed on the input end shell corresponding to the outer circumference of the first internal gear ring; the head edge of the first clamping screw abuts against the left end face of the first internal gear ring, pressing and fixing the first internal gear ring inside the input end shell; the outer circumference of the second internal gear ring is provided with a plurality of semi-circular second positioning protrusions; the output end shell has a second positioning groove that mates with the second positioning protrusions; a plurality of second pressing screws are installed on the output end shell corresponding to the outer circumference of the second internal gear ring; the head edge of the second pressing screw abuts against the left end face of the second internal gear ring, pressing and fixing the second internal gear ring inside the output end shell.

[0007] In a further description of this utility model, three of each of the first and second positioning protrusions are provided; three of each of the first and second clamping screws are provided; the positions of the first clamping screw and the first positioning protrusion are staggered; and the positions of the second clamping screw and the second positioning protrusion are staggered.

[0008] As further described in this utility model, the left circumference of the second internal gear ring has a plurality of blind holes distributed thereon.

[0009] In a further description of the present invention, the right side of the second sun gear is rotatably connected to the second planetary carrier via a fourth bearing.

[0010] The beneficial effects of this utility model are as follows:

[0011] This design uses only the input and output housings as the outer shell, eliminating the need for connecting flanges. The first and second internal gear rings are installed inside the output housings, significantly improving space utilization. The input shaft also does not require a separate support structure; it is directly connected to the second planetary carrier via the second bearing. The second planetary carrier serves as the output shaft, installed inside the output housing and outputting power from the output port. This design is compact, allowing for miniaturization of the overall structure to meet a wider range of application needs. Furthermore, the first groove on the input housing and the second groove on the output housing contribute to weight reduction, achieving a lightweight product. Attached Figure Description

[0012] Figure 1 is a cross-sectional view of the overall structure of this utility model;

[0013] Figure 2 is a structural diagram of the input end shell and the first internal gear ring of this utility model;

[0014] Figure 3 is a structural diagram of the right view in Figure 2;

[0015] Figure 4 is a structural diagram of the output end shell and the second internal gear ring of this utility model.

[0016] Figure 5 is a structural diagram of the right view in Figure 4. Detailed Implementation

[0017] The present invention will be further described below with reference to the accompanying drawings:

[0018] As shown in Figures 1-5, a compact joint reducer includes a housing 1, an input shaft 2, and a planetary reduction assembly 3. The housing 1 includes an input end housing 11 and an output end housing 12, which are distributed and fixedly connected on the left and right sides. The input end housing 11 has several first grooves 111 circumferentially distributed on its left and right sides. The output end housing 12 has several second grooves 121 circumferentially distributed on its left and right sides. An output port 122 is located at the center of the right end of the output end housing 12. A first internal gear ring 4 is fixed inside the input end housing 11. A second internal gear ring 4 is fixed inside the output end housing 12. Gear ring 5; The planetary reduction assembly 3 includes a first sun gear 31, a first planet carrier 32, a first planet gear 33, a second sun gear 34, a second planet carrier 35, and a second planet gear 36; The first planet carrier 32 is rotatably connected to the input end housing 11 via a first bearing 321; The input shaft 2 extends into the first planet carrier 32 from the left and is rotatably connected to the first planet carrier 32 via a second bearing 21; The first sun gear 31 is located inside the first planet carrier 32 and fixed to the right end of the input shaft 2; The first planet gear 33 is mounted on the first planet carrier 32 and is respectively connected to the first sun gear 34, a second planet carrier 35, and a second planet gear 36. The second sun gear 31 meshes with the first internal gear ring 4; the second sun gear 34 is located inside the output end housing 12 and fixed to the right end of the first planetary carrier 32; the second planetary carrier 35 is disposed inside the output end housing 12 and its right side is rotatably connected to the output port 122 via the third bearing 351; the second planet gear 36 is mounted on the second planetary carrier 35 and meshes with the second sun gear 34 and the second internal gear ring 5 respectively; this design only uses the input end housing 11 and the output end housing 12 as the outer shell 1, omitting the connecting flanges, and the first internal gear ring 4 and the second internal gear ring 5 are respectively mounted on the output end housing 122. The interior of the end shell 12 and the output end shell 12 greatly improves space utilization. The input shaft 2 does not require a separate support structure and is directly connected to the second planetary carrier 35 through the second bearing 21. The second planetary carrier 35 serves as the output shaft. The right end face of the second planetary carrier 35 has a screw hole for installing the driven component. This design is compact and can miniaturize the overall structure, thereby meeting more application requirements. Furthermore, the first groove 111 is provided on the input end shell 11 and the second groove 121 is provided on the output end shell 12, which reduces weight and achieves a lightweight effect for the product.

[0019] The outer circumference of the first internal gear ring 4 is provided with a plurality of semi-circular first positioning protrusions 41; the input end shell 11 has a first positioning groove 112 that mates with the first positioning protrusions 41; a plurality of first clamping screws 113 are installed on the input end shell 11 corresponding to the outer circumference of the first internal gear ring 4; the head edge of the first clamping screw 113 abuts against the left end face of the first internal gear ring 4, pressing and fixing the first internal gear ring 4 inside the input end shell 11; the outer circumference of the second internal gear ring 5 is provided with a plurality of semi-circular second positioning protrusions 51; the output end shell 12 has a second positioning groove 122 that mates with the second positioning protrusions 51; a plurality of second pressing screws are installed on the output end shell 12 corresponding to the outer circumference of the second internal gear ring 5; the head edge of the second pressing screw abuts against the left end face of the second internal gear ring 5, pressing and fixing the second internal gear ring 5 inside the output end shell 12. The design of the positioning protrusions prevents the internal gear ring from rotating, and the use of multiple clamping screws to clamp the internal gear ring provides high stability.

[0020] Three of each of the first positioning protrusion 41 and the second positioning protrusion 51 are provided; three of each of the first clamping screw 113 and the second clamping screw are provided; the positions of the first clamping screw 113 and the first positioning protrusion 41 are staggered; the positions of the second clamping screw and the second positioning protrusion 51 are staggered, which provides high stability.

[0021] The second internal gear ring 5 has several blind holes 52 distributed on the left circumference. In this design, the outer diameter of the second internal gear ring 5 is relatively large. Setting blind holes 52 on the second internal gear ring 5 can further improve the weight reduction effect.

[0022] The right side of the second sun gear 34 is rotatably connected to the second planet carrier 35 via the fourth bearing 341, which improves the stability of the second sun gear 34 installation.

[0023] The above description does not limit the technical scope of this invention. Any modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this invention shall still fall within the scope of the technical solution of this invention.

Claims

1. A compact articulated speed reducer, comprising a housing, an input shaft, and a planetary speed reduction assembly; characterized in that: The outer casing includes an input end casing and an output end casing that are distributed and fixedly connected on the left and right sides; the left and right sides of the input end casing each have a plurality of first grooves distributed circumferentially; the left and right sides of the output end casing each have a plurality of second grooves distributed circumferentially; an output port is provided at the center of the right end of the output end casing; a first internal gear ring is fixed inside the input end casing; a second internal gear ring is fixed inside the output end casing; the planetary reduction assembly includes a first sun gear, a first planet carrier, a first planet gear, a second sun gear, a second planet carrier, and a second planet gear; the first planet carrier is rotatably connected to the input end casing via a first bearing. Inside the end housing; the input shaft extends from the left into the first planetary carrier and is rotatably connected to the first planetary carrier via a second bearing; the first sun gear is located inside the first planetary carrier and fixed to the right end of the input shaft; the first planetary gear is mounted on the first planetary carrier and meshes with the first sun gear and the first internal gear ring respectively; the second sun gear is located inside the output end housing and fixed to the right end of the first planetary carrier; the second planetary carrier is disposed inside the output end housing and its right side is rotatably connected to the output port position via a third bearing; the second planetary gear is mounted on the second planetary carrier and meshes with the second sun gear and the second internal gear ring respectively.

2. The compact joint reducer according to claim 1, characterized in that: The outer circumference of the first internal gear ring is provided with a plurality of semi-circular first positioning protrusions; the input end shell has a first positioning groove that mates with the first positioning protrusions; a plurality of first clamping screws are installed on the input end shell corresponding to the outer circumference of the first internal gear ring; the head edge of the first clamping screw abuts against the left end face of the first internal gear ring, pressing and fixing the first internal gear ring inside the input end shell; the outer circumference of the second internal gear ring is provided with a plurality of semi-circular second positioning protrusions; the output end shell has a second positioning groove that mates with the second positioning protrusions; a plurality of second pressing screws are installed on the output end shell corresponding to the outer circumference of the second internal gear ring; the head edge of the second pressing screw abuts against the left end face of the second internal gear ring, pressing and fixing the second internal gear ring inside the output end shell.

3. The compact joint reducer according to claim 2, characterized in that: There are three of each of the first and second positioning protrusions; there are three of each of the first and second clamping screws; the positions of the first clamping screw and the first positioning protrusion are staggered; the positions of the second clamping screw and the second positioning protrusion are staggered.

4. The compact joint reducer according to claim 1, characterized in that: The second internal gear ring has several blind holes distributed on its left circumference.

5. A compact joint reducer according to claim 1, characterized in that: The right side of the second sun gear is rotatably connected to the second planet carrier via a fourth bearing.

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