阅读说明：本技术 一种蜗轮蜗杆与行星齿轮速度综合集成一体化结构 (Integrated integrated structure is synthesized with planetary gear speed to worm gear ) 是由 屈海龙 刘向 徐祥礼 姚成法 任鹏杰 于 2020-11-10 设计创作，主要内容包括：本发明涉及一种蜗轮蜗杆与行星齿轮速度综合集成一体化结构,其特征在于,蜗杆(1)与蜗轮(13)之间构成传动副,蜗轮(13)右端面与内齿圈(14)左端面连接形成一体化结构(2),行星架(6)通过行星架支撑左轴承(3)及行星架支撑右轴承(5)与一体化结构(2)连接；行星架支撑左轴承(3)与行星架支撑右轴承(5)之间通过轴承间垫圈(4)隔离；若干个销轴(10)穿入行星架(6)的销轴孔(15)中,若干个轴用弹性挡圈(11)安装于相应销轴(10)的挡圈卡槽(16)内,防止销轴(10)轴向脱落；若干个滚针轴承(9)套在相应的销轴(10)上。本发明有效的减小机电作动器的体积,增加了减速比的调节范围,避免了额外电磁制动器的使用。(The invention relates to a speed comprehensive integrated structure of a worm gear and a worm and a planetary gear, which is characterized in that a transmission pair is formed between the worm (1) and a worm wheel (13), the right end surface of the worm wheel (13) is connected with the left end surface of an inner gear ring (14) to form an integrated structure (2), and a planet carrier (6) is connected with the integrated structure (2) through a planet carrier supporting left bearing (3) and a planet carrier supporting right bearing (5); the planet carrier supporting left bearing (3) is isolated from the planet carrier supporting right bearing (5) through an inter-bearing washer (4); a plurality of pin shafts (10) penetrate into pin shaft holes (15) of the planet carrier (6), and a plurality of elastic check rings (11) for the shafts are arranged in check ring clamping grooves (16) of the corresponding pin shafts (10) to prevent the pin shafts (10) from falling off axially; a plurality of needle roller bearings (9) are sleeved on the corresponding pin shafts (10). The invention effectively reduces the volume of the electromechanical actuator, increases the adjusting range of the reduction ratio and avoids the use of an additional electromagnetic brake.)

1. A worm gear and worm and planetary gear speed integrated structure is characterized in that a transmission pair is formed between a worm (1) and a worm wheel (13), the right end face of the worm wheel (13) is connected with the left end face of an inner gear ring (14) to form an integrated structure (2), and a planet carrier (6) is connected with the integrated structure (2) through a planet carrier supporting left bearing (3) and a planet carrier supporting right bearing (5); the planet carrier supporting left bearing (3) is isolated from the planet carrier supporting right bearing (5) through an inter-bearing washer (4); a plurality of pin shafts (10) penetrate into pin shaft holes (15) of the planet carrier (6), and a plurality of elastic check rings (11) for the shafts are arranged in check ring clamping grooves (16) of the corresponding pin shafts (10) to prevent the pin shafts (10) from falling off axially; a plurality of needle roller bearings (9) are sleeved on corresponding pin shafts (10), a plurality of planet wheels (12) are respectively sleeved on the corresponding needle roller bearings (9), and a sun wheel (8) is installed in an inner hole of a planet carrier (6) through a sun wheel supporting bearing (7).

2. The integrated structure of the worm gear and the planetary gear speed synthesis as claimed in claim 1, characterized in that three needle bearings (9) penetrate into the central hole of the planetary gear (12) and are kept at the axial middle position of the central hole of the planetary gear (12).

3. The integrated structure of the worm gear and the worm and gear speed synthesis of the planet gear according to claim 1, characterized in that three planet wheels (12) are installed in the side groove of the planet carrier (6) until the center hole of the planet wheel (12) is coaxial with three pin shaft holes (15) which are evenly distributed in the circumferential direction on the planet carrier (6), and three pin shafts (10) penetrate into the pin shaft holes (15) from the left side of the planet carrier (6) until the movement can not be continued to move to the right.

4. The integrated structure of the worm gear and the speed of the planet gear according to claim 3, characterized in that the elastic retainer rings (11) for the three shafts are respectively clamped in the retainer ring clamping grooves (16) on the right end surface of the pin shaft (10).

5. The integrated structure of the worm gear and the worm and gear speed synthesis of the planet gear according to claim 1, characterized in that the planet carrier support left bearing (3), the washer (4) between the bearings and the planet carrier support right bearing (5) penetrate through the center hole of the right end in turn until the left movement cannot be continued.

6. The integrated structure of worm and gear speed and planetary gear speed synthesis of claim 1, characterized in that the right end center hole of the integrated structure (2) with the axis of the planet carrier (6) penetrates until the outer cylindrical surface of the left end axis thereof is fully contacted with the inner cylindrical surfaces of the left bearing (3) supported by the planet carrier and the right bearing (5) supported by the planet carrier.

7. The integrated structure of the worm gear and the speed of the planet gear according to claim 1, characterized in that the supporting bearing (7) of the sun gear is inserted into the central hole at the right end of the planet carrier (6) until the supporting bearing cannot move leftwards any more.

8. The integrated structure of worm gear and planetary gear speed synthesis of claim 7, characterized in that the sun gear (8) is installed from the right end gap of the planet carrier (6), and the left shaft of the sun gear (8) is inserted into the inner cylindrical hole of the sun gear support bearing (7) until the left movement can not be continued.

Technical Field

The invention belongs to the field of mechanical structure design, and particularly relates to a comprehensive integrated structure of speed of a worm gear and a planetary gear.

Background

With the further popularization of the concept of multi-electric and all-electric airplanes, the application of electromechanical actuators in aircrafts is more and more common. Because the aircraft has very high requirements on reliability and safety, how to improve the reliability and safety of the electromechanical actuator in the design of the electromechanical actuator becomes a key point and a difficult point of research in the field.

In order to improve the safety and reliability of the electromechanical actuator, a redundancy design concept is generally adopted, that is, power is transmitted from a plurality of input ends to an output end through a plurality of channels, and when one or more channels fail and cannot transmit power, the rest channels can continue to work, so that the whole actuator cannot be disabled.

In view of the profitability considerations, the most common of electromechanical actuators is a dual redundancy configuration. To achieve the goal of dual redundancy design, speed combining mechanisms are often used in the design of electromechanical actuators, while NGW-type planetary gears are one of the most frequently used speed combining mechanisms in mechanical designs. The NGW type planetary gear has three input/output ports which are respectively: any one of the inner gear ring, the planet carrier and the sun gear can be selected as an output port, and the other two can be input ports, so that the mechanical dual redundancy is realized. However, the switching between dual redundancy also has a certain precondition that, when one of the channels fails, it must be done in such a way that this channel is mechanically locked up, so that the standby channel can only transmit power.

The selection of the input and output ports and the mechanical locking mode of each channel can be selected according to the structural characteristics of the designed product, but the transmission ratio is usually required to be adjusted within a range of dozens to hundreds in the design of the electromechanical actuator, and the transmission ratio of one channel of the planetary gear mechanism is usually within 13, so that the use requirement is difficult to meet. In order to achieve a larger transmission ratio, multi-stage gear transmission is usually required, the reduction ratio of single-stage gear transmission is usually less than 10, and the multi-stage gear transmission directly brings the disadvantages of complex transmission structure, increased clearance accumulation, high processing cost, difficult assembly and disassembly and the like. Meanwhile, the mechanical locking mode usually adopted is an electromagnetic brake, the structure is complex, the reliability is low, and the structure has multiple faults. The application of electromagnetic brakes in electromechanical actuators is therefore to be minimized.

Disclosure of Invention

The purpose of the invention is: aiming at the problems, the scheme adopts an integrated structure of a worm gear and a worm with a large reduction ratio (usually the reduction ratio is more than 60) capable of self-locking and an NGW-type planetary gear, and the worm gear and the inner gear ring of the planetary gear are the same part and can be integrally processed to be used as a power input port. The sun gear is used as another input port, and the planet carrier is used as an output port. The structure can obtain a large reduction ratio, effectively reduce the volume of the actuator, reduce the cost, facilitate the disassembly and the assembly and the maintenance, and can solve a plurality of defects caused by multi-stage gear transmission. Meanwhile, as the worm and gear can be self-locked, when the channel fails, mechanical locking can be effectively realized, the switching of the channel can be smoothly completed, and an electromagnetic brake is not required to be additionally used, so that the whole electromechanical actuator is simpler and more reliable in structure.

The technical scheme of the invention is as follows: a worm gear and worm and planetary gear speed integrated structure, form the drive pair between worm 1 and worm gear 13, the right end of worm gear 13 is connected with left end of the inner gear ring 14 and formed the integrated structure 2, the planet carrier 6 supports the left bearing 3 and planet carrier supports the right bearing 5 and is connected with integrated structure 2 through the planet carrier; the planet carrier supporting left bearing 3 is isolated from the planet carrier supporting right bearing 5 through an inter-bearing washer 4; a plurality of pin shafts 10 penetrate into pin shaft holes 15 of the planet carrier 6, and a plurality of elastic check rings 11 for the shafts are arranged in check ring clamping grooves 16 of the corresponding pin shafts 10 to prevent the pin shafts 10 from falling off axially; a plurality of needle roller bearings 9 are sleeved on corresponding pin shafts 10, a plurality of planet wheels 12 are respectively sleeved on the corresponding needle roller bearings 9, and a sun wheel 8 is arranged in an inner hole of the planet carrier 6 through a sun wheel supporting bearing 7.

Preferably, three needle bearings 9 penetrate into the central hole of the planet wheel 12 and are held at axially intermediate positions in the central hole of the planet wheel 12.

Preferably, three planet wheels 12 are installed in the grooves on the side surface of the planet carrier 6 until the center holes of the planet wheels 12 are coaxial with three pin shaft holes 15 uniformly distributed in the circumferential direction on the planet carrier 6, and three pin shafts 10 penetrate into the pin shaft holes 15 from the left surface of the planet carrier 6 until the movement cannot be continued to the right.

Preferably, the three shaft circlips 11 are respectively clamped in a circlip clamping groove 16 at the right end face of the pin shaft 10.

Preferably, the planet carrier support left bearing 3, the inter-bearing washer 4 and the planet carrier support right bearing 5 sequentially penetrate through the right end center hole until the left movement cannot be continued.

Preferably, the central hole at the right end of the integrated structure 2 with the shaft of the planet carrier 6 penetrates until the outer cylindrical surface of the shaft at the left end of the integrated structure is fully contacted with the inner cylindrical surfaces of the left bearing 3 and the right bearing 5 of the planet carrier.

Preferably, the sun gear support bearing 7 is inserted into the right-end central hole of the carrier 6 until it cannot move further to the left.

Preferably, the sun gear 8 is installed in the right gap of the planet carrier 6, and the left shaft of the sun gear 8 is inserted into the inner cylindrical hole of the sun gear support bearing 7 until the left movement cannot be continued.

The invention has the beneficial effects that: the invention designs a comprehensive integrated structure of the speed of the worm gear and the speed of the planetary gear, adopts an integrated design scheme of the worm gear and the inner gear ring, and simultaneously utilizes the self-locking worm gear with a large reduction ratio, thereby effectively reducing the volume of an electromechanical actuator, increasing the adjustment range of the reduction ratio and avoiding the use of an additional electromagnetic brake. The problems of volume and weight increase, difficulty in dismounting, reliability reduction and the like caused by speed comprehensive multi-stage gear transmission of the traditional electromagnetic brake are solved. The whole planetary gear speed comprehensive mechanism and the worm and gear are integrally designed, and the mechanism is compact, small in size, light in weight, large in reduction ratio, convenient to maintain and high in reliability.

Drawings

FIG. 1 is a schematic view of a structure of a worm gear and a planetary gear integrated with speed.

FIG. 2 is a schematic view of the structure of the integration of the right end face of the worm wheel and the left end face of the inner gear ring.

Fig. 3 is a schematic structural diagram of the planet carrier.

Fig. 4 is a schematic diagram of a pin structure.

Wherein, 1: worm, 2: integrated structure, 3: the planet carrier supports the left bearing, 4: inter-bearing washer, 5: the planet carrier supports the right bearing, 6: planet carrier, 7: sun gear support bearing, 8: sun gear, 9: needle bearing, 10: pin shaft, 11: circlip for shaft, 12: planet wheel, 13: worm wheel, 14: inner gear ring, 15: pin shaft hole, 16: retaining ring clamping groove

Detailed Description

The invention is described in further detail below with reference to the drawings.

Refer to the attached figure 1 of the specification, which is a structural schematic diagram of the comprehensive integration of the speed of the worm gear and the planetary gear. A transmission pair is formed between the worm 1 and the worm wheel 13, and the worm wheel 13 and the inner gear ring 14 adopt an integrated design scheme, namely, the worm wheel right end face and the inner gear ring left end face are combined into an integrated structure 2, as shown in fig. 2. The planet carrier 6 is connected with the worm wheel right end face and the inner gear ring left end face through the planet carrier supporting left bearing 3 and the planet carrier supporting right bearing 5 in a combined integrated structure 2, and the planet carrier supporting left bearing 3 and the planet carrier supporting right bearing 5 are isolated through the inter-bearing washer 4. The needle bearing 9 is sleeved on the pin shaft 10, the planet wheel 12 is sleeved on the needle bearing 9, the pin shaft 10 penetrates into a pin shaft hole 15 of an inner gear ring 14 shown in fig. 3, and the elastic retainer ring 11 for the shaft is arranged in a retainer ring clamping groove 16 of the pin shaft 10 to prevent the pin shaft 10 from axially falling off. The sun gear 8 is mounted to the inner bore of the planet carrier 6 by a sun gear support bearing 7.

Three needle bearings 9 penetrate into the central hole of the planet wheel 12 and are held at the axial middle position of the central hole of the planet wheel 12.

Three planet wheels 12 are arranged in a groove on the side surface of the planet carrier 6 until the central hole of the planet wheel 12 is coaxial with three pin shaft holes 15 which are uniformly distributed in the circumferential direction on the planet carrier 6, and three pin shafts 10 penetrate into the pin shaft holes 15 from the left surface of the planet carrier 6 until the planet carrier cannot move rightwards continuously. The three shaft elastic check rings 11 are respectively clamped in check ring clamping grooves 16 on the right end face of the pin shaft 10.

The planet carrier supporting left bearing 3, the inter-bearing washer 4 and the planet carrier supporting right bearing 5 sequentially penetrate through the center hole of the right end until the left movement cannot be continued.

The left end of the planet carrier 6 with the shaft penetrates through the right end central hole of the integrated structure 2 combined by the right end surface of the worm wheel and the left end surface of the inner gear ring until the outer cylindrical surface of the left end shaft of the planet carrier is fully contacted with the inner cylindrical surfaces of the planet carrier supporting left bearing 3 and the planet carrier supporting right bearing 5.

The sun gear supporting bearing 7 is inserted into the right central hole of the planet carrier 6 until the left movement cannot be continued. The sun gear 8 is arranged in the right gap of the planet carrier 6, and the left shaft of the sun gear 8 is plugged into the inner cylindrical hole of the sun gear supporting bearing 7 until the sun gear cannot move leftwards continuously.

The invention provides a comprehensive integrated design structure of the speed of a worm gear and a worm and a planetary gear, which adopts the integrated design of a worm gear and an inner gear ring and a self-locking large reduction ratio worm gear and worm structure, and solves the problems of complex structure, large volume, large gap, high cost, difficult disassembly and assembly and the like caused by the adoption of multi-stage gear transmission for acquiring the large reduction ratio of transmission of a mechanical dual-redundancy electromechanical actuator. The dual-redundancy electromechanical actuator adopting the comprehensive NGW type planetary gear speed has the advantages of simple structure, small volume, low cost and convenient disassembly, assembly and maintenance. Meanwhile, the use of an electromagnetic brake is avoided, so that the NGW type planetary gear speed comprehensive dual-redundancy electromechanical actuator is adopted, the function is more reliable, and the application occasion is more flexible. Compared with the traditional planetary gear speed comprehensive mechanism adopting multi-stage gear transmission, the design scheme has the following outstanding advantages.

Firstly, the worm wheel 13 and the inner gear ring 14 are integrated, so that the connecting structure and the space requirement between the worm wheel and the inner gear ring are avoided, and the whole structure is more compact, small in size and light in weight.

Secondly, a speed comprehensive integration integrated structure of a worm gear capable of self-locking and a planetary gear is adopted, and selection of an electromagnetic brake during speed comprehensive is avoided, so that the whole electromechanical actuator is more reliable and compact.

Finally, the worm wheel 13 and the worm 1 are adopted, so that the transmission ratio adjusting range of the whole electromechanical actuator is increased, the use of multi-stage gears is avoided, and the volume and the weight of the whole electromechanical actuator are greatly reduced.