Planet carrier for improving stability of planetary reducer and planetary reducer

Abstract

The utility model relates to the technical field of mechanical transmission, in particular to a planet carrier used for improving the stability of a planetary reducer and the planetary reducer. A planet carrier assembly, a sun gear, a positioning ring and a locking piece are arranged in the planet carrier, one end of the sun gear is embedded into the planet carrier assembly, and the other end of the sun gear is embedded into the locking piece. An annular first fixing groove is formed in a cavity, used for being connected with the sun gear, of the planet carrier assembly, the inner ring of the positioning ring is fixedly connected with the outer side of the sun gear, the bottom face of the outer ring of the positioning ring is connected with the bottom face of the first fixing groove in a clamped mode, the side face of the outer ring of the positioning ring is connected with the side face of the first fixing groove in a clamped mode, and the locking piece is detachably installed on the planet carrier. The first fixing groove abuts against the bottom face and the side face of the positioning ring, and the locking piece abuts against the top face of the positioning ring, so that axial movement and radial movement of the sun gear are limited, radial displacement of the sun gear is limited while axial positioning of the sun gear is completed, and the service life of the sun gear is prolonged. The problem that the stability of the planetary reducer is reduced due to radial displacement of the sun gear is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical transmission, and in particular to a planetary carrier and a planetary reducer for improving the stability of a planetary reducer. Background Art

[0002] A planetary reducer is a speed converter that uses gears to reduce the number of revolutions of an electric motor to the desired number of revolutions and obtain a power transmission mechanism with a larger torque. It has the characteristics of light weight, small size, wide transmission ratio range, high efficiency, smooth operation, low noise and strong adaptability. Therefore, it is widely used in many industrial sectors such as lifting and transportation, engineering machinery, metallurgy, mining, petrochemical industry, construction machinery, light industry and textiles, medical equipment, instrumentation, automobiles, ships, weapons and aerospace.

[0003] The multi-stage planetary reducer used in the scraper conveyor is an NGW planetary gear reducer. In order to achieve the effect of load distribution, this reducer adopts a structure in which the sun gear and the planetary carrier assembly float simultaneously. Therefore, the entire floating planetary carrier assembly needs to be axially positioned. The axial positioning structure of the floating planetary carrier assembly currently on the market is complex and has many parts.

[0004] To solve the above technical problems, the technical solution of the Chinese utility model patent announcement with patent application number CN202220056387.2 is a planetary reducer axial positioning ring structure, including a housing, an output shaft, a planet carrier, a sun gear, and a planetary gear; wherein at least a portion of the output shaft is arranged in the housing; the planet carrier is connected to the output shaft inside the housing; the sun gear is arranged on the side of the planet carrier facing away from the output shaft; the planetary gear is arranged on the side of the planet carrier facing away from the output shaft; it also includes a limiter arranged between the planet carrier and the sun gear; the upper end of the limiter is provided with a clamping portion; the limiter is connected to the planet carrier through the clamping portion; the planetary reducer axial positioning ring structure proposed in the utility model has the advantages of simple structure, small internal axial dimension, large planet carrier bearing capacity and high production efficiency, wherein the internal axial dimension occupied becomes smaller, so that the output torque of the reducer becomes larger, thereby improving the use effect of the utility model.

[0005] However, the above-mentioned prior art has the following technical problems: the axial positioning ring structure of the planetary reducer realizes axial limitation of the sun gear by means of a limit member pressing against the sun gear, but does not radially limit the sun gear. The sun gear will produce radial movement during rotation, causing misalignment between the sun gear and the limit member, making it impossible for the limit member to completely press against the sun gear, causing the limit member to fail, thereby causing axial displacement of the sun gear and reducing the stability of the planetary reducer. Utility Model Content

[0006] In view of this, it is necessary to provide a planetary carrier and a planetary reducer for improving the stability of the planetary reducer, so as to radially limit the sun gear and solve the problem of reduced stability of the planetary reducer due to radial displacement of the sun gear.

[0007] In the first aspect, the utility model provides a planetary carrier for improving the stability of a planetary reducer, including a planetary carrier assembly, a sun gear, a positioning ring and a locking piece, one end of the sun gear is embedded in the planetary carrier assembly, and a first annular fixing groove is opened in the cavity of the planetary carrier assembly for connecting with the sun gear, the inner ring of the positioning ring is fixedly connected to the outer side of the sun gear, the bottom surface of the outer ring of the positioning ring is clamped with the bottom surface of the first fixing groove, so as to limit the axial movement of the sun gear toward the inner side of the planetary carrier through the bottom surface of the first fixing groove pressing against the bottom surface of the positioning ring, the side surface of the outer ring of the positioning ring is clamped with the side surface of the first fixing groove, and the side surface presses against the side surface and bottom surface of the positioning ring, so as to limit the radial movement of the sun gear through the side surface of the first fixing groove pressing against the side surface of the positioning ring, and the locking piece is detachably mounted on the planetary carrier, and the top surface of the outer ring of the positioning ring is clamped with one end of the locking piece facing the first fixing groove, so as to limit the axial movement of the sun gear toward the outer side of the planetary carrier through the locking piece pressing against the top surface of the positioning ring.

[0008] Preferably, an installation groove is provided on the outer side of the sun gear along the circumferential direction of the sun gear for fixedly installing the positioning ring.

[0009] Preferably, the locking member is a hole retaining ring, a second fixing groove is opened on the curved surface of the first fixing groove, the second fixing groove is coaxial with the first fixing groove, and the hole retaining ring is installed in the second fixing groove to limit the axial movement of the sun gear toward the outside of the planetary carrier by pressing the hole retaining ring against the top surface of the positioning ring.

[0010] Preferably, the locking member is at least four fixed plates, an installation hole is opened on the end of the planetary carrier assembly facing the sun gear, and at least four installation holes are evenly arranged along the circumferential direction of the sun gear, each fixed plate is opened with a fixing hole, so that the fixing plate can be fixed to the mounting hole through the fixing hole, and each fixing plate extends into the first fixing groove at one end facing the planetary carrier assembly and is clamped with the top surface of the positioning ring, so that the axial movement of the sun gear toward the outside of the planetary carrier can be limited by the fixing plate pressing against the top surface of the positioning ring.

[0011] Preferably, the cross section of the positioning ring is "L"-shaped to increase the contact area between the outer ring of the positioning ring and the first fixing groove.

[0012] Preferably, the positioning ring includes two semicircular positioning rings of the same structure to facilitate installation and removal of the positioning ring.

[0013] In the second aspect, the utility model provides a planetary reducer, including a planetary reducer body, an axial positioning gear and a planetary carrier for improving the stability of the planetary reducer as described in the first aspect, one end of the axial positioning gear is rotatably mounted on the planetary reducer body, and the other end is embedded in the planetary carrier for improving the stability of the planetary reducer, and is coaxially arranged with the sun gear.

[0014] The above-mentioned planetary carrier for improving the stability of the planetary reducer is provided with a planetary carrier assembly, a sun gear, a positioning ring and a locking piece. One end of the sun gear is embedded in the planetary carrier assembly, and a first annular fixing groove is opened in the cavity of the planetary carrier assembly for connecting with the sun gear. The inner ring of the positioning ring is fixedly connected to the outer side of the sun gear, the bottom surface of the outer ring of the positioning ring is clamped with the bottom surface of the first fixing groove, and the side surface of the outer ring of the positioning ring is clamped with the side surface of the first fixing groove. The locking piece is detachably installed on the planetary carrier, so that the bottom surface and the side surface of the positioning ring are supported by the first fixing groove, and the top surface of the positioning ring is supported by the locking piece, thereby limiting the axial movement and radial movement of the sun gear. While completing the axial positioning of the sun gear, the radial displacement of the sun gear is limited, thereby solving the problem of reduced stability of the planetary reducer due to radial displacement of the sun gear. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a cross-sectional view of a planetary carrier for improving the stability of a planetary reducer using the first embodiment of the present application.

[0016] Figure 2 It is a cross-sectional view of the planet carrier assembly using the first embodiment of the present application.

[0017] Figure 3 It is a cross-sectional view of a planetary carrier for improving the stability of a planetary reducer using the second embodiment of the present application.

[0018] Figure 4 It is a cross-sectional view of a planet carrier assembly using the second embodiment of the present application.

[0019] Figure 5 It is a front view of the sun gear of the present application.

[0020] Figure 6 It is a front view of the positioning ring of the present application.

[0021] Figure 7 It is a side sectional view of the positioning ring of the present application.

[0022] Figure 8 It is a cross-sectional view of the planetary reducer of the present application.

[0023] In the figure: a planetary carrier 10, a planetary carrier assembly 20, a first fixing groove 21, a second fixing groove 22, a mounting hole 23, a sun gear 30, a mounting groove 31, a positioning ring 40, a semicircular positioning ring 41, a locking piece 50, a hole retaining ring 51, a fixing plate 52, a fixing hole 53, a planetary reducer 60, a planetary reducer body 61, and an axial positioning gear 62 for improving the stability of the planetary reducer. DETAILED DESCRIPTION

[0024] The technical scheme and technical effects of the embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings of the present invention.

[0025] Please refer to Figures 1 to 4 The utility model provides a planetary carrier 10 for improving the stability of a planetary reducer, comprising a planetary carrier assembly 20, a sun gear 30, a positioning ring 40 and a locking member 50. One end of the sun gear 30 is embedded in the planetary carrier assembly 20. A first annular fixing groove 21 is provided in a cavity of the planetary carrier assembly 20 for connecting with the sun gear 30. The inner ring of the positioning ring 40 is fixedly connected to the outer side of the sun gear 30. The bottom surface of the outer ring of the positioning ring 40 is clamped with the bottom surface of the first fixing groove 21, so that the bottom surface of the first fixing groove 21 is pressed against the bottom surface of the positioning ring 40 to limit the axial movement of the sun gear 30 toward the inner side of the planetary carrier. The side surface of the outer ring of the positioning ring 40 is clamped with the side surface of the first fixing groove 21. Then, the radial movement of the sun gear 30 is limited by pressing the side of the first fixed groove 21 against the side of the positioning ring 40, and the locking piece 50 is detachably installed on the planetary carrier, so that the axial movement of the sun gear 30 toward the outside of the planetary carrier is limited by pressing the top surface of the positioning ring 40 by the locking piece 50. In this way, the axial and radial movements of the sun gear 30 are limited by pressing the bottom and side surfaces of the positioning ring 40 by the first fixed groove 21, and pressing the top surface of the positioning ring 40 by the locking piece 50. While completing the axial positioning of the sun gear 30, the radial displacement of the sun gear 30 is limited, thereby solving the problem of reduced stability of the planetary reducer 60 due to the radial displacement of the sun gear 30.

[0026] Please refer to Figure 5 Furthermore, a mounting groove 31 is formed on the outer side of the sun gear 30 along the circumferential direction of the sun gear 30 for fixing and mounting the positioning ring 40 .

[0027] Please refer to Figure 1 to Figure 2In the first embodiment, the locking member 50 is a hole retaining ring 51, and a second fixing groove 22 is opened on the first fixing 21 curved surface. The second fixing groove 22 and the first fixing groove 21 are coaxial. The hole retaining ring 51 is installed in the second fixing groove 22 to limit the axial movement of the sun gear 30 toward the outside of the planetary carrier by the hole retaining ring 51 against the top surface of the positioning ring 40. When installing the hole retaining ring 51, first put the hole retaining ring 51 on the sun gear 30, then insert the jaws of the circlip pliers into the clamp hole of the hole retaining ring 51, clamp the hole retaining ring 51, and then move the hole retaining ring 51 along the length direction of the sun gear 30 to the first fixed groove 22. At the second fixing groove 22, loosen the circlip pliers to relax the hole retaining ring 51 and snap it into the second fixing groove 22, and finally pull the pliers mouth of the circlip pliers out of the clamp hole of the hole retaining ring 51 to complete the installation of the hole retaining ring 51; when disassembling the fixed assembly, first insert the pliers mouth of the circlip pliers into the clamp hole of the hole retaining ring 51, clamp the hole retaining ring 51, separate the hole retaining ring 51 from the second fixing groove 22, and then move the hole retaining ring 51 out of the planetary carrier along the length direction of the sun gear 30, and finally loosen the circlip pliers to relax the hole retaining ring 51 and remove the hole retaining ring 51 from the sun gear 30 to complete the disassembly of the hole retaining ring 51.

[0028] Please refer to Figure 3 to Figure 4 In the second embodiment, the locking member 50 is at least four fixing plates 52, and a mounting hole 23 is opened on one end of the planetary carrier assembly 20 facing the sun gear 30, and at least four mounting holes 23 are evenly arranged along the circumferential direction of the sun gear 30, and each fixing plate 52 is opened with a fixing hole 53, so that the fixing plate 52 can be fixedly installed at the mounting hole 23 through the fixing hole 53, and each fixing plate 52 extends into the first fixing groove 21 at one end facing the planetary carrier assembly 20 and is clamped with the top surface of the positioning ring 40, so that the axial movement of the sun gear 30 toward the outer side of the planetary carrier is limited by the fixing plate 52 against the top surface of the positioning ring 40, and a fixing plate 52 is installed. 2, first clamp one end of the fixing plate 52 facing the planetary carrier assembly 20 with the top surface of the positioning ring 40, then set the fixing hole 53 opposite to one of the mounting holes 23, and then use bolts to fix the mounting hole 23 with the corresponding fixing hole 53 to complete the installation of one fixing plate 52, and finally repeat this process at least three times to complete the installation of all fixing plates 52; when removing one fixing plate 52, first remove the bolt from the mounting hole 23 to separate the mounting hole 23 from the fixing hole 53, and then remove the fixing plate 52 from the planetary carrier to complete the removal of one fixing plate 52, and finally repeat this process at least three times to complete the removal of all fixing plates 52.

[0029] Compared with the second embodiment as described above, the installation and disassembly of the hole retaining ring 51 in the first embodiment is more convenient, but after long-term use, the part of the hole retaining ring 51 that presses against the top surface of the positioning ring 40 will be deformed, resulting in the inability to continue to limit the positioning ring 40; the fixed plate 52 in the second embodiment presses against one end of the positioning ring 40, which has less wear and a longer service life, but the installation and disassembly are more cumbersome.

[0030] Please refer to Figure 6 to Figure 7 In the present embodiment, the cross-section of the positioning ring 40 is "L"-shaped to increase the contact area between the outer ring of the positioning ring 40 and the first fixed groove 21, reduce the pressure on the contact surface between the positioning ring 40 and the fixed groove, increase the service life of the positioning ring 40, and make the positioning ring 40 more sufficiently stressed, thereby enhancing the limiting effect of the first fixed groove 21 on the sun gear 30.

[0031] In this embodiment, the positioning ring 40 includes two semicircular positioning rings 41 of the same structure. The two semicircular positioning rings 41 are installed in the installation groove 31 by snap-fitting to form a complete positioning ring 40, so as to facilitate the installation and removal of the positioning ring 40.

[0032] Please refer to Figure 8 The utility model provides a planetary reducer 60, including a planetary reducer body 61, an axial positioning gear 62 and a planetary carrier 10 for improving the stability of the planetary reducer as described above, one end of the axial positioning gear 62 is rotatably mounted on the planetary reducer body 61, and the other end of the axial positioning gear 62 is embedded in the planetary carrier 10 for improving the stability of the planetary reducer, and is coaxially arranged with the sun gear 30. In this way, the sun gear 30 fixedly mounted on the planetary carrier by the positioning ring 40 and the locking member 50 can be regarded as a whole with the planetary carrier, and the sun gear 30 is coaxially arranged with the axial positioning gear 62, and the planetary carrier and the axial positioning gear 62 are also coaxially arranged, thereby completing the axial positioning of the planetary carrier in the planetary reducer 60.

[0033] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A planet carrier for improving the stability of a planetary reducer, characterized in that: The gear train assembly comprises a planetary carrier assembly, a sun gear, a positioning ring and a locking piece, wherein one end of the sun gear is embedded in the planetary carrier assembly, and a first annular fixing groove is opened in the cavity of the planetary carrier assembly used to connect with the sun gear, the inner ring of the positioning ring is fixedly connected to the outer side of the sun gear, the bottom surface of the outer ring of the positioning ring is clamped with the bottom surface of the first fixing groove, so as to limit the axial movement of the sun gear toward the inner side of the planetary carrier through the bottom surface of the first fixing groove pressing against the bottom surface of the positioning ring, the side surface of the outer ring of the positioning ring is clamped with the side surface of the first fixing groove, and the side surface presses against the side surface and bottom surface of the positioning ring, so as to limit the radial movement of the sun gear through the side surface of the first fixing groove pressing against the side surface of the positioning ring, and the locking piece is detachably mounted on the planetary carrier, and the top surface of the outer ring of the positioning ring is clamped with one end of the locking piece facing the first fixing groove, so as to limit the axial movement of the sun gear toward the outer side of the planetary carrier through the locking piece pressing against the top surface of the positioning ring.

2. The planet carrier for improving the stability of a planetary reducer according to claim 1, characterized in that: The outer side of the sun gear is provided with a mounting groove along the circumferential direction of the sun gear for fixing and mounting the positioning ring.

3. The planet carrier for improving the stability of a planetary reducer according to claim 1, characterized in that: The locking member is a hole retaining ring, a second fixing groove is opened on the curved surface of the first fixing groove, the second fixing groove is coaxial with the first fixing groove, and the hole retaining ring is installed in the second fixing groove to limit the axial movement of the sun gear toward the outside of the planetary carrier by pressing the hole retaining ring against the top surface of the positioning ring.

4. The planet carrier for improving the stability of a planetary reducer according to claim 1, characterized in that: The locking member is at least four fixed plates, an installation hole is opened on the end of the planetary carrier assembly facing the sun gear, and at least four installation holes are evenly arranged along the circumferential direction of the sun gear, each fixed plate is opened with a fixing hole, so that the fixing plate can be fixed to the mounting hole through the fixing hole, and each fixing plate extends into the first fixing groove at one end facing the planetary carrier assembly and is clamped with the top surface of the positioning ring, so that the axial movement of the sun gear toward the outside of the planetary carrier can be limited by the fixing plate pressing against the top surface of the positioning ring.

5. The planet carrier for improving the stability of a planetary reducer according to claim 1, characterized in that: The cross section of the positioning ring is "L"-shaped to increase the contact area between the outer ring of the positioning ring and the first fixing groove.

6. The planet carrier for improving the stability of a planetary reducer according to claim 5, characterized in that: The positioning ring comprises two semicircular positioning rings with the same structure, so as to facilitate the installation and removal of the positioning rings.

7. A planetary reducer, characterized in that: It comprises a planetary reducer body, an axial positioning gear and a planetary carrier for improving the stability of the planetary reducer as described in any one of claims 1 to 6, wherein one end of the axial positioning gear is rotatably mounted on the planetary reducer body, and the other end is embedded in the planetary carrier for improving the stability of the planetary reducer and is coaxially arranged with the sun gear.

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