High torque planetary reducer

Abstract

The present invention discloses a large torque planetary reducer, comprising: a transition flange, a connecting flange and a planetary gear reduction mechanism, one end of the transition flange is a power input end, the other end of the transition flange is fixedly mounted with the connecting flange, the planetary gear reduction mechanism is installed in the internal accommodation space of the transition flange and the connecting flange, the transition flange, the connecting flange and the planetary gear reduction mechanism are installed together to form a reducer body, and a cross roller bearing is installed at the output end of the reducer body to withstand a large torque power output. Through the above method, the output end of the large torque planetary reducer of the present invention adopts a cross roller bearing, which can withstand high speed, high torque and large impact, has strong assembly applicability, can be simply assembled on various servo motors, and can also be assembled with other types of reducers to achieve the characteristics of ultra-large speed ratio reduction and ultra-large torque output.

Description

Technical Field

[0001] The present invention relates to the technical field of reducers, and in particular to a large-torque planetary reducer. Background Art

[0002] Planetary reducer is a widely used industrial product, its performance is comparable to other military-grade reducer products, but with the price of industrial-grade products. Planetary reducer has the characteristics of light weight, small size, wide transmission ratio range, high efficiency, stable operation, low noise and strong adaptability, and is widely used in metallurgy, mining, lifting and transportation, electricity, energy, construction and building materials, light industry, transportation and other industrial sectors.

[0003] For current industrial automation, running smoothly under high torque for a long time without losing precision is a major test for planetary reducers. The high torque output of planetary reducers places extremely high demands on the strength of the internal gears of the reducer and the coordination between the various parts. If one part is not handled properly, it is very likely to cause the failure of the entire reducer. At the same time, the backlash of the reducer needs to be reasonably controlled to meet the actual use requirements and prevent low backlash from causing heat generation during the operation of the planetary reducer and even shortening its service life. Summary of the invention

[0004] The main technical problem solved by the present invention is to provide a large-torque planetary reducer, which adopts a cross roller bearing at the output end and can withstand high speed, high torque and large impact for up to 20,000 hours. The service efficiency is as high as over 90%, and the assembly applicability is strong. It can be simply assembled on various servo motors and can also be assembled with other types of reducers to achieve ultra-large speed ratio deceleration and ultra-large torque output characteristics. It adopts an excellent sealing structure to ensure that there is no oil leakage during a working time of up to tens of thousands of hours.

[0005] In order to solve the above technical problems, a technical solution adopted by the present invention is: to provide a large torque planetary reducer, including: a transition flange, a connecting flange and a planetary gear reduction mechanism, one end of the transition flange is a power input end, the other end of the transition flange is fixedly installed with the connecting flange, and the planetary gear reduction mechanism is installed in the internal accommodation space of the transition flange and the connecting flange.

[0006] The transition flange, the connecting flange and the planetary gear reduction mechanism are installed together to form a reducer body. A cross roller bearing is installed at the output end of the reducer body to withstand a large torque power output.

[0007] In a preferred embodiment of the present invention, the crossed roller bearing includes a crossed roller bearing inner ring, rollers and a crossed roller bearing outer ring, rollers are installed between the crossed roller bearing inner ring and the crossed roller bearing outer ring to form an integrated crossed roller bearing, and the crossed roller bearing outer ring rotates through the rollers as the crossed roller bearing inner ring rotates.

[0008] In a preferred embodiment of the present invention, the planetary gear reduction mechanism includes a first-stage planetary reduction mechanism and a second-stage planetary reduction mechanism:

[0009] The first-stage planetary reduction mechanism includes a first-stage sun gear, a first-stage planetary gear, a first-stage planetary carrier and an inner gear ring.

[0010] The first-stage planetary gears are rotatably connected to the first-stage planetary carrier and meshed with the first-stage sun gear. The first-stage planetary gears are evenly distributed around the central axis of the first-stage planetary carrier. An inner gear ring is sleeved on the outer periphery of the first-stage planetary carrier. The first-stage planetary gears make circular motion inside the inner gear ring to drive the first-stage planetary carrier to rotate around its central axis.

[0011] The second-stage planetary reduction mechanism includes a secondary sun gear, a secondary planetary gear, a cross roller bearing inner ring and a cross roller bearing outer ring.

[0012] The secondary sun gear is connected to the center of the primary planet carrier, the secondary planetary gears are evenly distributed around the central axis of the inner ring of the cross roller bearing, the outer ring of the cross roller bearing is rotatably connected to the outer periphery of the inner ring of the cross roller bearing, and the secondary planetary gears are meshed with the secondary sun gear.

[0013] The rotation of the first-stage planet carrier drives the second-stage sun gear to rotate, and the second-stage sun gear drives the second-stage planetary gear to rotate. The second-stage planetary gear and the first-stage planetary gear simultaneously make circular motion around the inner gear ring. The circular motion drives the inner ring of the cross roller bearing to rotate around its central axis, and at the same time drives the outer ring of the cross roller bearing to rotate.

[0014] In a preferred embodiment of the present invention, a dust cover is installed on the transition flange, a clamping clamp is installed inside the transition flange, the clamping clamp is locked inside the transition flange by a second hexagon socket head screw, and the input end of the clamping clamp is connected to the motor shaft to realize power drive.

[0015] In a preferred embodiment of the present invention, a bearing for supporting the motor shaft is also installed in the accommodation space inside the transition flange, and an elastic retaining ring is installed outside the bearing.

[0016] In a preferred embodiment of the present invention, three first-stage planetary gears are evenly distributed along the central axis of the first-stage planet carrier, and three second-stage planetary gears are evenly distributed along the central axis of the inner ring of the cross roller bearing.

[0017] In a preferred embodiment of the present invention, the first-stage planetary gear is fixedly mounted on the first-stage planetary carrier through a first-stage planetary gear locating pin, and the first-stage planetary gear can rotate around the first-stage planetary gear locating pin.

[0018] In a preferred embodiment of the present invention, the secondary planetary gear is fixedly mounted on the inner ring of the cross roller bearing through the secondary planetary gear locating pin, and the secondary planetary gear can rotate around the secondary planetary gear locating pin.

[0019] In a preferred embodiment of the present invention, the inner gear ring is installed on the output side of the transition flange, the connecting flange is fixed on the inner gear ring and connected to the transition flange by a first hexagon socket head screw, and the first sealing ring is installed at the parts where the transition flange and the connecting flange are connected on both sides of the inner gear ring.

[0020] In a preferred embodiment of the present invention, a second sealing ring is installed between the cross roller bearing and the connecting flange, and the end of the cross roller bearing is also sealed by a skeleton oil seal.

[0021] The beneficial effects of the present invention are as follows: the output end of the large-torque planetary reducer of the present invention adopts a cross roller bearing, which can withstand high speed, high torque and large impact for up to 20,000 hours, with an efficiency of more than 90%, strong assembly applicability, and can be simply assembled on various servo motors. It can also be assembled with other types of reducers to achieve ultra-large speed ratio deceleration and ultra-large torque output characteristics, and adopts an excellent sealing structure to ensure that there is no oil leakage during a working time of up to tens of thousands of hours. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work, among which:

[0023] Figure 1 It is an exploded view of a preferred embodiment of a high torque planetary reducer of the present invention;

[0024] Figure 2 It is a left view of a preferred embodiment of a large torque planetary reducer of the present invention;

[0025] Figure 3 It is a right side view of a preferred embodiment of a high torque planetary reducer of the present invention;

[0026] Figure 4 It is a cross-sectional view of a preferred embodiment of a high-torque planetary reducer of the present invention;

[0027] The markings of the components in the accompanying drawings are as follows: 1. first hexagon socket cylindrical head screw, 2. dust cover, 3. transition flange, 4. clamping clamp, 5. second hexagon socket cylindrical head screw, 6. primary sun gear, 7. bearing, 8. elastic retaining ring, 9. first sealing ring, 10. inner gear ring, 11. connecting flange, 12. second sealing ring, 13. roller, 14. primary planet carrier, 15. primary planet gear locating pin, 18. primary planet gear, 20. secondary sun gear, 21. secondary planet gear locating pin, 23. secondary planet gear, 24. inner ring of cross roller bearing, 25. roller anti-slip block, 27. outer ring of cross roller bearing, 28. skeleton oil seal, 29. cross roller bearing. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] See also Figures 1 to 4 , the embodiment of the present invention includes:

[0030] A large torque planetary reducer comprises: a transition flange 3, a connecting flange 11 and a planetary gear reduction mechanism, wherein one end of the transition flange 3 is a power input end, the other end of the transition flange 3 is fixedly mounted with the connecting flange 11, and the planetary gear reduction mechanism is installed in the internal accommodation space of the transition flange 3 and the connecting flange 11.

[0031] The transition flange 3, the connecting flange 11 and the planetary gear reduction mechanism are installed together to form a reducer body. A cross roller bearing 29 is installed at the output end of the reducer body, which can withstand high torque power output, high speed, high torque and large impact.

[0032] The crossed roller bearing 29 comprises a crossed roller bearing inner ring 24, rollers 13 and a crossed roller bearing outer ring 27. The rollers 13 are installed between the crossed roller bearing inner ring 24 and the crossed roller bearing outer ring 27 to form an integrated crossed roller bearing 29. The crossed roller bearing inner ring 24 is provided with a roller anti-slip block 25 to ensure the tight installation of the rollers. The crossed roller bearing outer ring 27 rotates through the rollers 13 as the crossed roller bearing inner ring 24 rotates.

[0033] The planetary gear reduction mechanism comprises a first-stage planetary reduction mechanism and a second-stage planetary reduction mechanism, and the first-stage planetary reduction mechanism and the second-stage planetary reduction mechanism sequentially realize power transmission.

[0034] The first-stage planetary reduction mechanism includes a first-stage sun gear 6 , a first-stage planetary gear 18 , a first-stage planet carrier 14 and an inner ring gear 10 . The first-stage planetary gear 18 is rotatably connected to the first-stage planet carrier 14 and meshingly connected with the first-stage sun gear 6 .

[0035] The first-stage planetary gears 18 are evenly distributed around the central axis of the first-stage planetary carrier 14. An inner gear ring 10 is sleeved on the outer periphery of the first-stage planetary carrier 14. The first-stage planetary gears 18 make circular motion inside the inner gear ring 10 to drive the first-stage planetary carrier 14 to rotate around its central axis.

[0036] The second-stage planetary reduction mechanism includes a secondary sun gear 20, a secondary planetary gear 23, a cross-roller bearing inner ring 24 and a cross-roller bearing outer ring 27. The secondary sun gear 20 is connected to the center of the primary planet carrier 14, and the secondary planetary gears 23 are evenly distributed around the central axis of the cross-roller bearing inner ring 24. The cross-roller bearing outer ring 27 is rotatably connected to the outer periphery of the cross-roller bearing inner ring 24, and the secondary planetary gears 23 are meshed and connected to the secondary sun gear 20.

[0037] The rotation of the first-stage planet carrier 14 drives the second-stage sun gear 20 to rotate, and the second-stage sun gear 20 drives the second-stage planetary gear 23 to rotate. The second-stage planetary gear 23 and the first-stage planetary gear 18 simultaneously make circular motion around the inner gear ring 10. The circular motion drives the inner ring 24 of the cross roller bearing to rotate around its central axis, and at the same time drives the outer ring 27 of the cross roller bearing to rotate. The inner ring 24 of the cross roller bearing is equipped with an output shaft to realize power output.

[0038] Furthermore, a dust cover 2 is installed on the transition flange 3, and a clamping clamp 4 is installed inside the transition flange 3. The clamping clamp 4 is locked inside the transition flange 3 by a second hexagon socket head screw 5, and the input end of the clamping clamp 4 is connected to the motor shaft to realize power drive.

[0039] A bearing 7 for supporting the motor shaft is also installed in the accommodation space inside the transition flange 3, and an elastic retaining ring 8 is installed outside the bearing 7, which can further improve the supporting capacity of the reducer body.

[0040] There are three evenly distributed primary planetary gears 18 along the central axis of the primary planet carrier 14 . The primary planetary gears 18 are fixedly mounted on the primary planet carrier 14 via primary planetary gear locating pins 15 . The primary planetary gears 18 can rotate around the primary planetary gear locating pins 15 .

[0041] There are three secondary planetary gears 23 evenly distributed along the central axis of the inner ring 24 of the cross roller bearing. The secondary planetary gears 23 are fixedly mounted on the inner ring 24 of the cross roller bearing through the secondary planetary gear locating pins 21. The secondary planetary gears 23 can rotate around the secondary planetary gear locating pins 24.

[0042] The inner gear ring 10 is installed on the output side of the transition flange 3, and the connecting flange 11 is fixed on the inner gear ring 10 and connected to the transition flange 3 by the hexagon socket head screw 1. The inner gear ring 11 adopts the thin-wall elastic gear production technology, which can control the gear backlash on the reducer inner gear ring 11 to less than three arc minutes, with higher assembly accuracy, and can be applied to high-precision intelligent equipment.

[0043] The first sealing ring 9 is installed at the parts where the transition flange 3 and the connecting flange 11 are connected on both sides of the inner gear ring 11, and the second sealing ring 12 is installed at the part where the cross roller bearing 29 is connected to the connecting flange 11. The end of the cross roller bearing 29 is also sealed by a skeleton oil seal 28. The excellent sealing structure is adopted in the reducer body to ensure that there is no oil leakage during the working time of up to tens of thousands of hours.

[0044] The working process of the high torque planetary reducer of the present invention is:

[0045] The motor shaft is installed at the input end of the reducer body for power input, which drives the primary sun gear 6 to rotate, and the primary sun gear 6 drives the primary planetary gear 18. The primary planetary gear 18 makes a circular motion inside the inner gear ring 10 (the inner gear ring 10 is stationary) and drives the primary planetary carrier 14 to rotate around the axis. The rotation of the primary planetary carrier 14 drives the secondary sun gear 20 to rotate.

[0046] The secondary sun gear 20 drives the secondary planetary gear 23 to rotate. The secondary planetary gear 23, like the primary planetary gear 18, makes a circular motion around the inner gear ring 10. The circular motion drives the inner ring 24 of the cross roller bearing to rotate around its axis, and then drives the integrated cross roller bearing 29 to rotate, and realizes power output through the output shaft.

[0047] The beneficial effects of the high torque planetary reducer of the present invention are:

[0048] The output end of the reducer adopts a cross roller bearing, which can withstand high speed, high torque and large impact;

[0049] The inner gear ring adopts thin-wall elastic gear production technology, which can control the gear backlash on the inner gear ring in the reducer to less than 3 arc minutes, suitable for any high-precision intelligent equipment;

[0050] The reducer can be used for up to 20,000 hours, with an efficiency of more than 90%, low power loss, no heat and no noise after long-term use;

[0051] The assembly applicability of the reducer components is strong. It can be easily assembled on various servo motors, and can also be assembled with other types of reducers to achieve ultra-large speed ratio reduction and ultra-large torque output characteristics;

[0052] The reducer adopts an excellent sealing structure to ensure that there is no oil leakage during the working time of tens of thousands of hours.

[0053] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A high torque planetary reducer, characterized in that: include: The transition flange, the connecting flange and the planetary gear reduction mechanism, one end of the transition flange is the power input end, the other end of the transition flange is fixedly installed with the connecting flange, and the planetary gear reduction mechanism is installed in the internal accommodation space of the transition flange and the connecting flange. The transition flange, connecting flange and planetary gear reduction mechanism are installed together to form the reducer body. The output end of the reducer body is installed with a cross roller bearing, which can withstand high torque power output. The crossed roller bearing comprises a crossed roller bearing inner ring, rollers and a crossed roller bearing outer ring. Rollers are installed between the crossed roller bearing inner ring and the crossed roller bearing outer ring to form an integrated crossed roller bearing. The crossed roller bearing outer ring rotates through the rollers as the crossed roller bearing inner ring rotates. The planetary gear reduction mechanism includes the first-stage planetary reduction mechanism and the second-stage planetary reduction mechanism: The first-stage planetary reduction mechanism includes a first-stage sun gear, a first-stage planetary gear, a first-stage planetary carrier and an inner ring gear. The inner ring gear adopts a thin-walled elastic gear. The first-stage planetary gears are rotatably connected to the first-stage planetary carrier and meshed with the first-stage sun gear. The first-stage planetary gears are evenly distributed around the central axis of the first-stage planetary carrier. An inner gear ring is sleeved on the outer periphery of the first-stage planetary carrier. The first-stage planetary gears make circular motion inside the inner gear ring to drive the first-stage planetary carrier to rotate around its central axis. The second-stage planetary reduction mechanism includes a secondary sun gear, a secondary planetary gear, a cross roller bearing inner ring and a cross roller bearing outer ring. The secondary sun gear is connected to the center of the primary planet carrier, the secondary planetary gears are evenly distributed around the central axis of the inner ring of the cross roller bearing, the outer ring of the cross roller bearing is rotatably connected to the outer periphery of the inner ring of the cross roller bearing, and the secondary planetary gears are meshed with the secondary sun gear. The rotation of the first-stage planet carrier drives the second-stage sun gear to rotate, and the second-stage sun gear drives the second-stage planetary gear to rotate. The second-stage planetary gear and the first-stage planetary gear simultaneously make circular motion around the inner gear ring. The circular motion drives the inner ring of the cross roller bearing to rotate around its central axis, and at the same time drives the outer ring of the cross roller bearing to rotate.

2. The high torque planetary reducer according to claim 1, characterized in that: A dust cover is installed on the transition flange, a clamping clamp is installed inside the transition flange, the clamping clamp is locked inside the transition flange through a second hexagon socket head screw, and the input end of the clamping clamp is connected to the motor shaft to realize power drive.

3. The high torque planetary reducer according to claim 2, characterized in that: A bearing supporting the motor shaft is also installed in the accommodation space inside the transition flange, and an elastic retaining ring is installed outside the bearing.

4. The high torque planetary reducer according to claim 1, characterized in that: There are three evenly distributed first-stage planetary gears along the central axis of the first-stage planet carrier, and there are three evenly distributed second-stage planetary gears along the central axis of the inner ring of the cross roller bearing.

5. The high torque planetary reducer according to claim 4, characterized in that: The first-stage planetary gear is fixedly mounted on the first-stage planetary carrier through the first-stage planetary gear locating pin, and the first-stage planetary gear can rotate around the first-stage planetary gear locating pin.

6. The high torque planetary reducer according to claim 4, characterized in that: The secondary planetary gear is fixedly mounted on the inner ring of the cross roller bearing through the secondary planetary gear locating pin, and the secondary planetary gear can rotate around the secondary planetary gear locating pin.

7. The high torque planetary reducer according to claim 1, characterized in that: The inner gear ring is installed on the output side of the transition flange, the connecting flange is fixed on the inner gear ring and connected to the transition flange through the first hexagon socket head screw, and the first sealing ring is installed at the parts where the transition flange and the connecting flange are connected on both sides of the inner gear ring.

8. The high torque planetary reducer according to claim 1, characterized in that: A second sealing ring is installed between the cross roller bearing and the connecting flange, and the end of the cross roller bearing is also sealed by a skeleton oil seal.

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