Output structure of planetary reducer

Abstract

The utility model provides an output structure of a planetary reducer, and belongs to the technical field of reducers. The technical problem that an existing speed reducer is unstable in output and the like is solved. An output structure of a planetary reducer comprises an input end cover and an output end cover, a planetary reducing mechanism is fixedly connected between the input end cover and the output end cover, an input shaft is installed in the input end cover through a tapered roller bearing in a supporting mode, and the planetary reducing mechanism comprises an inner gear ring fixedly connected with the input end cover and the output end cover. A planet gear is in meshing transmission connection with the inner gear ring and rotationally and fixedly installed in a planet carrier, a sun gear in meshing transmission with the planet gear is arranged in the planet carrier, the input shaft rotates to enable the planet carrier to rotate, a spline hole is formed in the planet carrier, and an output shaft is in spline connection with the interior of the spline hole. The periphery of the planet carrier is supported and installed in the output end cover through a first deep groove ball bearing, the end, away from the spline hole, of the output shaft is fixedly connected with a fixing base, and the fixing base is supported and installed outside the output end cover through a double-row spherical roller bearing. The sealing structure has the advantages of good sealing performance, stable rotation and the like.

Description

Technical Field

[0001] The utility model belongs to the technical field of reducers, in particular to an output structure of a planetary reducer. Background Art

[0002] A planetary reducer is a reducer with three planetary gears rotating around a sun gear. The planetary reducer achieves the purpose of speed reduction by meshing a gear with a small number of teeth with a large gear with a large number of teeth.

[0003] At present, for example, in the planetary reducer with patent number 2016105549989, a sprocket hub and a first output shaft housing are provided on the outer side of the first output shaft, the sprocket hub is arranged at the rear end of the first output shaft housing, a first pressure cover is provided at the rear end of the sprocket hub, and the first output shaft and the first output shaft housing are connected through a first bearing; a second sealing ring is provided at the connection between the output end of the first output shaft and the sprocket hub, a floating seal ring is provided at the connection between the first output shaft housing and the sprocket hub, and a first sealing ring is provided between the floating seal ring and the first output shaft housing and the sprocket hub. The first pressure cover is fixed to the first output shaft by a first bolt; the intermediate shaft is fixed to the input end of the first output shaft by a second bolt; the third-stage inner gear ring is fixed to the first output shaft housing and the intermediate housing by a third bolt. The first output shaft is rotated to the sprocket hub. Since the sprocket hub and the first output shaft housing need to be sealed and rotated through the floating seal ring, it is easy to cause oil leakage and unstable rotation. Summary of the invention

[0004] In view of the deficiencies in the prior art, the utility model aims to provide an output structure of a planetary reducer with good sealing performance and stable rotation.

[0005] The purpose of the utility model can be achieved through the following technical solutions: an output structure of a planetary reducer, including an input end cover and an output end cover, a planetary reduction mechanism is fixedly connected between the input end cover and the output end cover, an input shaft is supported and installed in the input end cover through a tapered roller bearing, the planetary reduction mechanism includes an inner gear ring fixedly connected to the input end cover and the output end cover, the inner gear ring is connected to a planetary gear through a toothed transmission, the planetary gear is rotatably fixedly installed in a planetary carrier, a sun gear is arranged in the planetary carrier for toothed transmission with the planetary gear, the input shaft rotates to drive the planetary carrier to rotate, a spline hole is provided inside the planetary carrier, an output shaft is spline-connected in the spline hole, the outer periphery of the planetary carrier is supported and installed in the output end cover through a deep groove ball bearing, an end of the output shaft away from the spline hole is fixedly connected to a fixed seat, and the fixed seat is supported and installed outside the output end cover through a double-row spherical roller bearing.

[0006] Furthermore, the output shaft has an enlarged shaft portion protruding outward from the first end away from the planetary carrier, and the fixed seat includes a cylindrical bearing mounting portion and a shaft fixing portion, a flange fixing portion protruding outward is provided between the bearing mounting portion and the shaft fixing portion, a double-row spherical roller bearing is fixedly installed between the bearing mounting portion and the output end cover, and the enlarged shaft portion extends into the shaft fixing portion and is fixed by a spline.

[0007] Furthermore, a skeleton oil seal 1 is arranged between the upper end of the bearing mounting portion and the output end cover, and the skeleton oil seal 1 is located at the upper end of the double-row spherical roller bearing.

[0008] Furthermore, the outer end surface of the shaft fixing portion is fixedly connected with a cover plate, and a sealing member 1 is arranged between the cover plate and the outer end surface of the shaft fixing portion.

[0009] Furthermore, the outer peripheral surface of the flange fixing portion is provided with a cutting plane, a through oil hole is provided on the cutting plane, and the outside of the oil hole is blocked with an oil drain plug.

[0010] Furthermore, the planetary reduction mechanism includes a first-stage planetary mechanism, a second-stage planetary mechanism and a third-stage planetary mechanism connected in series, the first-stage planetary mechanism includes a first-stage sun gear, a first-stage planetary gear, a first-stage internal gear ring and a first-stage planet carrier, the second-stage planetary mechanism includes a second-stage sun gear, a second-stage planetary gear, a second-stage internal gear ring and a second-stage planet carrier, the third-stage planetary mechanism includes a third-stage sun gear, a third-stage planetary gear, a third-stage internal gear ring and a third-stage planet carrier, the first-stage internal gear ring, the second-stage internal gear ring and the third-stage internal gear ring are respectively fixedly connected between the input end cover and the output end cover, the input shaft is splined to the first-stage sun gear, the first-stage planet carrier is splined to the second-stage sun gear, the second-stage planet carrier is splined to the third-stage sun gear, and the third-stage planet carrier is splined to the output shaft.

[0011] Furthermore, the three-stage planetary frame includes a three-stage planetary fixing frame and a three-stage planetary end cover which are separately arranged. The three-stage planetary fixing frame and the three-stage planetary end cover are fixed by pin shaft fixing bolts. Three evenly distributed three-stage pin shafts are fixedly arranged between the three-stage planetary fixing frame and the three-stage planetary end cover, and a three-stage planetary gear is rotatably arranged outside the three-stage pin shaft.

[0012] Furthermore, a fixed cylinder is protruded from one end of the three-stage planetary end cover away from the three-stage planetary fixed frame, the spline hole is arranged in the fixed cylinder, and a deep groove ball bearing is arranged between the outside of the fixed cylinder and the output end cover.

[0013] Furthermore, the output end cover has an output fixing portion extending into the fixing seat, a double-row spherical roller bearing is arranged between the output fixing portion and the fixing seat, and a clamping ring is fixedly arranged on the lower end surface of the output fixing portion.

[0014] Furthermore, a second skeleton oil seal is provided between the upper end of the input end cover and the input shaft.

[0015] Compared with the prior art, the technical effects of the utility model are as follows: 1. The output torque is output through the output structure, thereby improving the stability and sealing of the whole machine. The output structure is composed of an output shaft, an output end cover and a fixed seat. The planetary reduction mechanism transmits the power to the output shaft to rotate the output shaft. The outer periphery of the planetary carrier is supported and installed in the output end cover through a deep groove ball bearing. The end of the output shaft away from the spline hole is fixedly connected with a fixed seat. The fixed seat is supported and installed outside the output end cover through a double-row spherical roller bearing. The output torque outputted by the output structure is more stable due to the mutual support inside and outside. 2. The fixed seat is supported and installed outside the output end cover by a double-row spherical roller bearing. The outside of the fixed seat is fixed to the external transmission mechanism through a flange fixing part. Both ends of the fixed seat are sealed. The oil holes on the fixed seat can be unloaded separately, so that the output structure is better sealed, the rotation is more stable, and the oil change is more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a cross-sectional view of an embodiment of the present utility model.

[0017] Figure 2 It is a sectional view of Example 2 of the present utility model.

[0018] Figure 3 It is a three-dimensional diagram of the utility model.

[0019] Figure number marking: 1, input end cover; 2, output end cover; 21, output fixed part; 3, tapered roller bearing; 4, input shaft; 5, internal gear ring; 51, primary internal gear ring; 52, secondary internal gear ring; 53, tertiary internal gear ring; 6, planetary gear; 61, primary planetary gear; 62, secondary planetary gear; 63, tertiary planetary gear; 7, planetary carrier; 701, spline hole; 71, primary planetary carrier; 72, secondary planetary carrier; 73, tertiary planetary carrier; 731, tertiary planetary fixed frame; 732, tertiary planetary end cover; 7321, fixed cylinder; 8 , sun gear; 81, first-stage sun gear; 82, second-stage sun gear; 83, third-stage sun gear; 9, output shaft; 91, shaft expansion; 10, fixed seat; 101, bearing mounting portion; 102, shaft fixing portion; 103, flange fixing portion; 104, cutting plane; 105, oil hole; 11, double-row spherical roller bearing; 12, skeleton oil seal one; 13, cover plate; 14, seal one; 15, oil drain plug; 16, pin fixing bolt; 17, third-stage pin; 18, deep groove ball bearing one; 19, skeleton oil seal two; 20, clamping ring. DETAILED DESCRIPTION

[0020] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0021] It should be noted that the descriptions of the present invention regarding directions such as "up", "down", "left", "right", "top" and "bottom" are all defined based on the relationships between the orientations or positions shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device must be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0022] according to Figure 1 Figure 3 As shown, in the first embodiment, an output structure of a planetary reducer comprises an input end cover 1 and an output end cover 2, wherein a planetary reduction mechanism is fixedly connected between the input end cover 1 and the output end cover 2. An input shaft 4 is supported and installed in the input end cover 1 through a tapered roller bearing 3, and the planetary reduction mechanism comprises an inner gear ring 5 fixedly connected to the input end cover 1 and the output end cover 2, wherein the inner gear ring 5 is connected to a planetary gear 6 through internal gearing transmission, and the planetary gear 6 is rotatably fixedly installed in a planetary carrier 7, wherein a sun gear 8 is provided in the planetary carrier 7 through gearing transmission with the planetary gear 6, and the input shaft 4 is rotated to drive the planetary carrier 7 to rotate, and the planetary carrier 7 has a spline hole 701 inside, and an output shaft 9 is spline-connected in the spline hole 701. One end of the outer circumference of the planetary carrier 7 is supported and installed in the output end cover 2 through a deep groove ball bearing 18, and the other end of the outer circumference of the planetary carrier 7 is supported and installed in the input end cover 1 through a deep groove ball bearing 2. The end of the output shaft 9 away from the spline hole 701 is fixedly connected to a fixing seat 10, and the fixing seat 10 is supported and installed outside the output end cover 2 through a double-row spherical roller bearing 11. A skeleton oil seal 19 is arranged between the upper end of the input end cover 1 and the input shaft 4.

[0023] The first end of the output shaft 9 away from the planet carrier 7 has an outwardly protruding shaft expansion portion 91, and the fixed seat 10 includes a cylindrical bearing mounting portion 101 and a shaft fixing portion 102, and a flange fixing portion 103 protruding outward is provided between the bearing mounting portion 101 and the shaft fixing portion 102. A double-row spherical roller bearing 11 is fixedly installed between the bearing mounting portion 101 and the output end cover 2, and the shaft expansion portion 91 extends into the shaft fixing portion 102 for spline fixation. A skeleton oil seal 12 is provided between the upper end of the bearing mounting portion 101 and the output end cover 2, and the skeleton oil seal 12 is located at the upper end of the double-row spherical roller bearing 11.

[0024] The outer end surface of the shaft fixing part 102 is fixedly connected with a cover plate 13, and a seal 14 is arranged between the cover plate 13 and the outer end surface of the shaft fixing part 102. The outer peripheral surface of the flange fixing part 103 has a cutting plane 104, and the cutting plane 104 is provided with a through oil hole 105, and the oil hole 105 is blocked with an oil drain plug 15.

[0025] according to Figure 2As shown, the second embodiment is different from the above in that the planetary reduction mechanism can be a multi-stage planetary gear, which can be a two-stage planetary reduction mechanism, a three-stage planetary reduction mechanism or a four-stage planetary reduction mechanism, etc. Here, a three-stage planetary mechanism is preferably used, wherein the planetary reduction mechanism includes a first-stage planetary mechanism, a second-stage planetary mechanism and a third-stage planetary mechanism connected in series, the first-stage planetary mechanism includes a first-stage sun gear 818, a first-stage planetary gear 616, a first-stage inner gear ring 515 and a first-stage planet carrier 717, the second-stage planetary mechanism includes a second-stage sun gear 828, a second-stage planetary gear 626, The secondary internal gear ring 525 and the secondary planet carrier 727, the three-stage planetary mechanism includes a three-stage sun gear 838, a three-stage planetary gear 636, a three-stage internal gear ring 535 and a three-stage planet carrier 737, the first-stage internal gear ring 515, the second-stage internal gear ring 525 and the third-stage internal gear ring 535 are respectively fixedly connected between the input end cover 1 and the output end cover 2, the first-stage internal gear ring 515 is fixed between the input end cover 1 and the first-stage connecting sleeve, the second-stage internal gear ring 525 is fixed between the first-stage connecting sleeve and the second-stage connecting sleeve, and the third-stage internal gear ring 535 is fixed between the second-stage connecting sleeve and the output end cover 2.

[0026] The input shaft 4 is spline-connected with the first-stage sun gear 818 to drive the first-stage sun gear 818 to rotate, the first-stage sun gear 818 drives the first-stage planet carrier 717 to rotate, the first-stage planet carrier 717 is spline-connected with the second-stage sun gear 828 to drive the second-stage sun gear 828 to rotate, the second-stage sun gear 828 drives the second-stage planet carrier 727 to rotate, the second-stage planet carrier 727 is spline-connected with the tertiary sun gear 838 to drive the tertiary sun gear 838 to rotate, the tertiary planet carrier 737 is spline-connected with the output shaft 9 to drive the output shaft 9 to rotate, the output shaft 9 drives the fixed seat 10 to rotate, and the fixed seat 10 drives the external transmission mechanism to rotate.

[0027] The three-stage planet carrier 737 is divided into two parts, and includes a three-stage planet fixing frame 731 and a three-stage planet end cover 732. The three-stage planet fixing frame 731 and the three-stage planet end cover 732 are fixed by a pin fixing bolt 16. Three evenly distributed three-stage pins 17 are fixed between the three-stage planet fixing frame 731 and the three-stage planet end cover 732. The three-stage pins 17 are rotatably provided with three-stage planetary wheels 636. Since the three-stage planetary mechanism is relatively large, the planet carrier 7 with a divided arrangement can better install the planetary wheels 6 and achieve better coordination with the output shaft 9.

[0028] A fixed cylinder 7321 is protruded from one end of the third-stage planetary end cover 732 away from the third-stage planetary fixed frame 731, and a spline hole 701 is arranged in the fixed cylinder 7321. A deep groove ball bearing 18 is arranged between the outside of the fixed cylinder 7321 and the output end cover 2. An output fixing portion 21 is extended into the fixed seat 10 of the output end cover 2, and a double-row spherical roller bearing 11 is arranged between the output fixing portion 21 and the fixed seat 10. A clamping ring 20 is fixedly arranged on the lower end surface of the output fixing portion 21.

[0029] The output structure of the reducer can improve the stability and sealing of the whole machine. The output structure has better sealing, more stable rotation and more convenient oil change.

[0030] The above embodiments are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope defined by the claims of the present invention.

Claims

1. An output structure of a planetary reducer, comprising an input end cover (1) and an output end cover (2), a planetary reduction mechanism being fixedly connected between the input end cover (1) and the output end cover (2), an input shaft (4) being supported and installed in the input end cover (1) via a tapered roller bearing (3), the planetary reduction mechanism comprising an inner gear ring (5) being fixedly connected to the input end cover (1) and the output end cover (2), the inner gear ring (5) being internally gear-engaged and connected to a planetary gear (6), the planetary gear (6) being rotationally fixedly installed in a planetary carrier (7), a sun gear (8) being gear-engaged and driven with the planetary gear (6) being arranged in the planetary carrier (7), the input shaft (4) being rotated and driven to rotate the planetary carrier (7), and the characteristic is that: The planet carrier (7) has a spline hole (701) inside, and the output shaft (9) is spline-connected in the spline hole (701). The outer periphery of the planet carrier (7) is supported and installed in the output end cover (2) through a deep groove ball bearing (18). The end of the output shaft (9) away from the spline hole (701) is fixedly connected to a fixed seat (10), and the fixed seat (10) is supported and installed outside the output end cover (2) through a double-row spherical roller bearing (11).

2. The output structure of a planetary reducer according to claim 1, characterized in that: The output shaft (9) has a shaft expansion portion (91) protruding outwardly at a first end away from the planet carrier (7); the fixing seat (10) comprises a cylindrical bearing mounting portion (101) and a shaft fixing portion (102); a flange fixing portion (103) protruding outwardly is provided between the bearing mounting portion (101) and the shaft fixing portion (102); a double-row spherical roller bearing (11) is fixedly mounted between the bearing mounting portion (101) and the output end cover (2); and the shaft expansion portion (91) extends into the shaft fixing portion (102) and is fixed by a spline.

3. The output structure of a planetary reducer according to claim 2, characterized in that: A skeleton oil seal (12) is provided between the upper end of the bearing mounting portion (101) and the output end cover (2); the skeleton oil seal (12) is located at the upper end of the double-row spherical roller bearing (11).

4. The output structure of a planetary reducer according to claim 3, characterized in that: The outer end surface of the shaft fixing portion (102) is fixedly connected to a cover plate (13), and a sealing member 1 (14) is provided between the cover plate (13) and the outer end surface of the shaft fixing portion (102).

5. The output structure of a planetary reducer according to claim 4, characterized in that: The outer peripheral surface of the flange fixing portion (103) is provided with a cutting plane (104), a through oil hole (105) is provided on the cutting plane (104), and the outside of the oil hole (105) is blocked with an oil drain screw plug (15).

6. The output structure of a planetary reducer according to any one of claims 1 to 5, characterized in that: The planetary reduction mechanism comprises a first-stage planetary mechanism, a second-stage planetary mechanism and a third-stage planetary mechanism connected in series, the first-stage planetary mechanism comprising a first-stage sun gear (81), a first-stage planetary gear (61), a first-stage internal gear ring (51) and a first-stage planet carrier (71), the second-stage planetary mechanism comprising a second-stage sun gear (82), a second-stage planetary gear (62), a second-stage internal gear ring (52) and a second-stage planet carrier (72), the third-stage planetary mechanism comprising a third-stage sun gear (83), a third-stage planetary gear (63), a third-stage internal gear ring (5 3) and a three-stage planet carrier (73), the first-stage internal gear ring (51), the second-stage internal gear ring (52) and the third-stage internal gear ring (53) are respectively fixedly connected between the input end cover (1) and the output end cover (2), the input shaft (4) is spline-connected to the first-stage sun gear (81), the first-stage planet carrier (71) is spline-connected to the second-stage sun gear (82), the second-stage planet carrier (72) is spline-connected to the third-stage sun gear (83), and the third-stage planet carrier (73) is spline-connected to the output shaft (9).

7. The output structure of a planetary reducer according to claim 6, characterized in that: The three-stage planet carrier (73) comprises a three-stage planet fixing frame (731) and a three-stage planet end cover (732) which are separately arranged. The three-stage planet fixing frame (731) and the three-stage planet end cover (732) are fixed by a pin fixing bolt (16). Three evenly distributed three-stage pins (17) are fixedly arranged between the three-stage planet fixing frame (731) and the three-stage planet end cover (732). A three-stage planet wheel (63) is rotatably arranged outside the three-stage pin (17).

8. The output structure of a planetary reducer according to claim 7, characterized in that: A fixed cylinder (7321) protrudes from one end of the third-stage planetary end cover (732) away from the third-stage planetary fixed frame (731), the spline hole (701) is arranged in the fixed cylinder (7321), and a deep groove ball bearing (18) is arranged between the outside of the fixed cylinder (7321) and the output end cover (2).

9. The output structure of a planetary reducer according to claim 1, characterized in that: The output end cover (2) has an output fixing portion (21) extending into the fixing seat (10), a double-row spherical roller bearing (11) is arranged between the output fixing portion (21) and the fixing seat (10), and a clamping ring (20) is fixedly arranged on the lower end surface of the output fixing portion (21).

10. The output structure of a planetary reducer according to claim 1, characterized in that: A second skeleton oil seal (19) is provided between the upper end of the input end cover (1) and the input shaft (4).

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