Two-stage planetary reducer

Abstract

The utility model provides a two-stage planetary reducer, and belongs to the technical field of planetary reducers. The problem that in the prior art, a first-stage planetary gear can fall off from a planetary support is solved. The speed reducer comprises a speed reducer shell, a first-stage inner gear ring, a first-stage planetary gear, a planetary support, a second-stage inner gear ring, a second-stage planetary gear and an output shaft, the speed reducer shell comprises a motor flange, a first-stage outer connecting body, a second-stage outer connecting body and a supporting body, the first-stage outer connecting body is fixedly installed on the outer side of the first-stage inner gear ring, and the second-stage outer connecting body is fixedly installed on the outer side of the second-stage planetary gear. The second-stage outer connecting body is fixedly installed on the outer side of the second-stage inner gear ring, the first-stage planetary gear is connected with the inner side of the first-stage inner gear ring in a meshed mode, the planetary support is in a round cake shape, the interior of the planetary support is of a hollow structure, an installation hole is formed in the side end face of the planetary support, and the first-stage planetary gear is installed in the planetary support and extends out of the installation hole. A mounting hole is formed in the planet support, crescent grooves are formed in the inner walls of the planet support on the two sides of the mounting hole, a through first-stage shaft hole is formed in the planet support on the inner side of the mounting hole, a first-stage planet shaft is fixed in the first-stage shaft hole in a penetrating mode, the first-stage planet shaft penetrates through the first-stage planet gear, and an axial frame is formed on one side of the planet support. The utility model has the advantage of high stability.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of planetary reducer, and relates to a two-stage planetary reducer. BACKGROUND

[0002] The two-stage planetary reducer is a common industrial mechanical equipment, which is composed of two or more planetary reducers, can realize larger speed reduction ratio and torque output, has the characteristics of compact structure and stable torque output, and is widely applied to multiple fields.

[0003] The Chinese patent with patent publication No. CN205244260U discloses a planetary reducer, which comprises a first-stage sun gear, a first-stage planetary gear, a first-stage planetary gear carrier, a second-stage sun gear, a second-stage planetary gear, an output disc, an inner gear ring and a fixing member, the inner gear ring comprises a first-stage inner gear and a second-stage inner gear inside, the fixing member is provided with an output hole for mounting the output disc, the fixing member is connected with the inner gear ring, the circumferential direction of the inner gear ring is provided with a plurality of clamping blocks, the clamping blocks are provided with clamping grooves, the fixing member is provided with a plurality of clamping members matched with the number of the clamping grooves, the free ends of the clamping members are provided with clamping hooks, the clamping members are elastic members, and the clamping hooks extend radially outward from the outer side surfaces of the clamping members.

[0004] In the planetary reducer provided by the patent, the first-stage planetary gear carrier (i.e. the planetary support) has a single-sided structure, and the first-stage planetary gear is only mounted on one side of the first-stage planetary gear carrier and is mounted through the shaft on the first-stage planetary gear carrier. The structure has the risk of falling of the first-stage planetary gear during long-time use, which affects the work of the planetary reducer. UTILITY MODEL CONTENTS

[0005] The utility model aims at the above problems existing in the prior art, and provides a two-stage planetary reducer.

[0006] The objective of this utility model can be achieved through the following technical solution: A two-stage planetary reducer includes a reducer housing, a first-stage internal gear ring, a first-stage planetary gear, a planetary support, a second-stage internal gear ring, a second-stage planetary gear, and an output shaft. The reducer housing includes a motor flange, a first-stage external connector, a second-stage external connector, and a support. The first-stage external connector is fixedly installed on the outside of the first-stage internal gear ring, and the second-stage external connector is fixedly installed on the outside of the second-stage internal gear ring. The first-stage planetary gear meshes with the inside of the first-stage internal gear ring. The planetary support is disc-shaped and has a hollow internal structure. The support has a mounting hole on its side end face. The first-stage planetary gear is installed inside the planetary support and extends out of the mounting hole. Crescent grooves are formed on the inner walls of the planetary support on both sides of the mounting hole. A through first-stage shaft hole is formed on the planetary support inside the mounting hole. A first-stage planetary shaft is fixedly inserted in the first-stage shaft hole. The first-stage planetary shaft passes through the first-stage planetary gear. An axial carrier is formed on one side of the planetary support. A second-stage sun gear is meshed and fixed inside the axial carrier. The second-stage planetary gear is meshed and connected to the inner side of the second-stage internal gear ring. The second-stage sun gear is meshed and connected to the second-stage planetary gear.

[0007] In the aforementioned two-stage planetary reducer, a fixing washer is attached and fixed to the planetary support on the outer side of the first-stage shaft hole.

[0008] In the aforementioned two-stage planetary reducer, a sleeve hole is provided at the center of one side of the planetary support, and a gear sleeve is connected and fixed in the sleeve hole.

[0009] In the aforementioned two-stage planetary reducer, protrusions are formed inside both sides of the mounting hole of the planetary support, and the upper end face of the protrusion is an arc surface.

[0010] Compared with the prior art, the two-stage planetary reducer provided by this utility model has the following beneficial effects: the planetary support is hollow inside and has a disk-shaped structure with several mounting structures on the side end face of the planetary support, so that the first-stage planetary gear is installed inside the planetary support. The first-stage planetary shaft passes through the first-stage planetary gear and is connected to the planetary support, so that the first-stage planetary gear can be stably installed on the planetary support. Furthermore, crescent grooves are opened on both sides of the mounting hole to prevent the first-stage planetary gear from contacting the planetary support during use, thus avoiding damage. Attached Figure Description

[0011] Fig. 1 This is a schematic diagram of the overall structure of this utility model;

[0012] Fig. 2 This is a schematic diagram of the exploded structure of this utility model;

[0013] Fig. 3 This is a schematic diagram of a planetary support structure.

[0014] In the diagram: 1. Speed ​​reducer housing; 11. Motor flange; 12. First-stage external connector; 13. Second-stage external connector; 14. Support body; 2. First-stage internal gear ring; 3. First-stage planetary gear; 31. First-stage planetary shaft; 4. Planetary support; 41. Mounting hole; 42. Crescent groove; 43. First-stage shaft hole; 44. Axial support; 45. Fixing washer; 46. Sleeve hole; 47. Protrusion; 48. Arc surface; 5. Second-stage internal gear ring; 6. Second-stage planetary gear; 7. Output shaft; 8. Second-stage sun gear; 9. Gear sleeve. Detailed Implementation

[0015] 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.

[0016] like Figs. 1-3 As shown, this embodiment includes a reducer housing 1, a primary internal gear ring 2, a primary planetary gear 3, a planetary support 4, a secondary internal gear ring 5, a secondary planetary gear 6, a secondary sun gear 8, and an output shaft 7. The reducer housing 1 is assembled from a motor flange 11, a primary external connector 12, a secondary external connector 13, and a support 14. The primary external connector 12 and the secondary external connector 13 are respectively fixedly installed on the outside of the primary internal gear ring 2 and the secondary internal gear ring 5. The inner sides of the primary internal gear ring 2 and the secondary internal gear ring 5 are respectively connected to the tooth shapes of the primary planetary gear 3 and the secondary planetary gear 6. The primary planetary gear 3 meshes with the inner side of the primary internal gear ring 2, and the secondary planetary gear 6 meshes with the inner side of the secondary internal gear ring 5. There are three primary planetary gears 3 and three secondary planetary gears 6.

[0017] like Figs. 1-3 As shown, the planetary support 4 is disc-shaped and hollow inside. Three mounting holes 41 are formed on the side end face of the planetary support 4. The first-stage planetary gear 3 is installed inside the planetary support 4 and extends out of the mounting holes 41. Crescent grooves 42 are formed on the inner walls of the planetary support 4 on both sides of the mounting holes 41 to ensure that the planetary support 4 does not contact the first-stage planetary gear 3. Three through-holes 43 are formed on the planetary support 4 inside the mounting holes 41. A first-stage planetary shaft 31 is fixedly inserted into each of the first-stage shaft holes 43. Each of the first-stage planetary shafts 31 has a first-stage planetary gear 3 passing through it. The mounting holes 41 of the planetary carrier 4 have protrusions 47 formed on both sides inside. The upper surface of the protrusions 47 is an arc surface 48. The arc surface 48 ensures that the planetary carrier 4 will not contact the first-stage planetary gear 3. An axial support 44 is formed on the outer side of one end of the planetary carrier 4. The axial support 44 has a tooth shape inside. One end of the second-stage sun gear 8 extends into the axial support 44 and meshes with the tooth shape inside the axial support 44. The other end of the second-stage sun gear 8 extends into the middle of the three second-stage planetary gears 6 and meshes with the three second-stage planetary gears 6.

[0018] To elaborate further, such as Figs. 1-2 As shown, a sleeve hole 46 is provided at the center of one side of the planetary support 4, and a toothed sleeve 9 is connected and fixed in the sleeve hole 46.

[0019] To elaborate further, such as Fig. 3 As shown, a fixing washer 45 is attached and fixed on the planetary support 4 outside the primary shaft hole 43. The fixing washer 45 seals the primary shaft hole 43 and limits the primary planetary shaft 31 to prevent it from falling off.

[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 two-stage planetary reducer, comprising a reducer housing (1), a first-stage internal gear ring (2), a first-stage planetary gear (3), a planetary carrier (4), a second-stage internal gear ring (5), a second-stage planetary gear (6), and an output shaft (7), characterized in that: The reducer housing (1) includes a motor flange (11), a primary external connector (12), a secondary external connector (13), and a support (14). The primary external connector (12) is fixedly installed on the outside of the primary internal gear ring (2), and the secondary external connector (13) is fixedly installed on the outside of the secondary internal gear ring (5). The primary planetary gear (3) meshes with the inside of the primary internal gear ring (2). The planetary support (4) is disc-shaped and has a hollow interior. The planetary support (4) has a mounting hole (41) on its side end face. The primary planetary gear (3) is installed inside the planetary support (4) and extends out of the mounting hole. The mounting hole (41) has a crescent groove (42) on the inner wall of the planetary support (4) on both sides of the mounting hole (41). A through first-stage shaft hole (43) is provided on the planetary support (4) inside the mounting hole (41). A first-stage planetary shaft (31) is fixedly inserted in the first-stage shaft hole (43). A first-stage planetary gear (3) passes through the first-stage planetary shaft (31). An axial frame (44) is formed on one side of the planetary support (4). A second-stage sun gear (8) is meshed and fixed inside the axial frame (44). The second-stage planetary gear (6) is meshed and connected to the inner side of the second-stage internal gear ring (5). The second-stage sun gear (8) is meshed and connected to the second-stage planetary gear (6).

2. The two-stage planetary reducer according to claim 1, characterized in that: A fixing washer (45) is attached and fixed on the planetary support (4) outside the primary shaft hole (43).

3. A two-stage planetary reducer according to claim 1, characterized in that: The planetary support (4) has a sleeve hole (46) at the center of one side, and a toothed sleeve (9) is connected and fixed in the sleeve hole (46).

4. A two-stage planetary reducer according to claim 1, characterized in that: The planetary support (4) has protrusions (47) formed inside both sides of the mounting hole (41), and the upper surface of the protrusion (47) is an arc surface (48).

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