• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to a planetary reduction gear comprising an input shaft (1), a planetary gear unit (2), a housing (3), an inner gear ring unit (4) and an output shaft (5); wherein a gear (101) extending along the axial direction of the input shaft (1) is provided at one end of the input shaft (1); the planetary gear unit (2) comprises a planetary gear shaft (201), a planetary gear (202) and a planetary gear bearing (203) for supporting the planetary gear (202); the inner gear ring unit (4) comprises a first inner gear ring unit (401) and a second inner gear ring unit (402), the first inner gear ring unit (401) and the second inner gear ring unit (402) each having first engagement teeth (4011) and second gears Engaging gear teeth (4021), and a first inner gear ring flange (4012) and a second inner gear ring flange (4022); the output shaft (5) has an output shaft flange (501) securely connected to the first inner gear ring flange (4012) and the second inner gear ring flange (4022), the input shaft (1) and the output shaft (5) being rotatably mounted on the housing (3) are mounted, and the planetary gear shaft (201) is securely connected to the housing (3).
    公开号:CH713240A2
    申请号:CH00213/17
    申请日:2017-02-23
    公开日:2018-06-15
    发明作者:Muo Shuai；Zhang Yidu；Wu Qiong；Chen Shuguang
    申请人:Univ Beihang；
    IPC主号:
    专利说明:

    Description Field of the Invention The present invention relates to a planetary reduction gearbox, and more particularly to an aileron planetary gear reducer for aircraft engines.
    Description of the Related Art Mechanical transmission is one of the most classic core technologies in mechanical engineering, and mechanical transmission systems are used in industrial areas to a very large extent. Where there is master power there is a mechanical transmission system used to vary the speed to achieve machine speed adjustment by increasing the speed and reducing the torque or by reducing the speed and increasing the torque.
    In the mechanical transmission, it is required, especially in the field of aircraft propulsion, that a reduction gear has a large gear ratio, a small size, and high power density. The requirements for a reduction gear used in a precision robot, in a space manipulator, aircraft engine, as a main reduction gear of a helicopter, as a transmission system for ships and tanks, etc. are becoming higher and higher, and relate to almost every high technology field, as well as aviation technology, Space technology, marine equipment and weapons.
    In existing reduction gears, the structure of the meshing gear pair is very complex, and some parts of the components may be too small, so that manufacturing and maintenance are difficult, and the load capacity and the power density are lower.
    SUMMARY OF THE INVENTION
    It is the object of the present invention to provide a planetary reduction gear with a simple and compact structure that can transmit large torques.
    The present invention provides a planetary reduction gear comprising an input shaft, a planetary gear unit, a housing, an inner gear ring unit, and an output shaft; [0007] a gear extending along the axial direction of the input shaft is provided at one end of the input shaft; The planetary gear unit comprises a planetary gear shaft (Planetenradwelle), a planetary gear and a planetary gear bearing for supporting the planet gear; The inner gear ring unit comprises a first inner gear ring unit and a second inner gear ring unit, wherein the first inner gear ring unit and the second inner gear ring unit are respectively provided with a first engagement tooth and a second engagement tooth, and with a first inner ring gear flange and a second inner ring gear flange ; The output shaft has an output shaft flange securely connected to the first inner gear ring flange and the second inner gear ring flange, the input shaft and the output shaft are rotatably supported on the housing, and the planetary gear shaft is securely connected to the housing.
    Preferably, the first inner ring gear flange and the second inner ring gear flange extend radially outwardly along the first inner gear ring unit and the second inner gear ring unit, wherein the first inner ring gear flange and the second inner ring gear flange are secured together.
    Preferably, the planetary reduction gear comprises at least three planetary gear units, the planetary gear is a hollow cylinder with a first planetary gear and second planetary gear, which are arranged on the outer sides of the hollow cylinder, with a spacer along the axis of the planetary gear, wherein the first planetary gear and the second planetary gear with engage the input shaft gear, respectively with the first engagement gear and the second engagement gear.
    Preferably, the first meshing gear and the second meshing teeth are helical gears extending obliquely and intersecting with each other in the direction of the axis of the input shaft, wherein the first planetary gear teeth and the second planetary gear teeth are helical gears, each with the first meshing teeth and the second Engage engagement gear, the gear of the input shaft has two helical gears, which are the first helical gear, which is engaged with the first engagement toothing, and the second helical gear, which is in engagement with the second engagement toothing.
    Preferably, the output shaft is a stepped cylinder having an output shaft flange, a plate, a concave cavity (recess), a hollow cylinder portion and an output member, wherein the output shaft flange is securely connected to the inner gear ring unit, wherein one ends of the input shaft on the concave
    Cavity of the output shaft is held by means of the input shaft bearing, and the output shaft is held on the second end cover of the housing by means of an output shaft bearing.
    Preferably, at least one Planetenraddurchgangsloch extending through the wall of the hollow cylindrical Pla-netenrads provided on the planetary gear between the first planetary gear and the second planetary gear, and at least one inner Planetenraddurchgangsloch on the first inner gear ring unit and the second inner Gear ring unit provided.
    Preferably, the gear, the planetary gear, the first meshing teeth and the second meshing teeth with module 4 mm-6 mm, helix angle 25 <ß <30, pressure angle 22.5 ° -25 ° are formed.
    Preferably, at least three I-shaped mounting seats are arranged on the housing in the circular direction with an equal angular distance.
    The inner gear ring unit of the invention is provided as a flange structure which can effectively increase the connection force between the inner gear rings, and transmit higher loads with a simple structure, and which can be easily manufactured. The provision of the flange structure results in a great reduction of the difficulties in the manufacture of the reduction gear and in the simplification of the structure of the reduction gear. This will directly lead to low production costs in the production of the reduction gear, and the maintenance of the reduction gear and the installation will be easy and convenient.
    According to the invention, the following parameters are used in the reduction gears, which are: module 4 mm-6 mm, helix angle 25 <ß <30, pressure angle 22.5 ° -25 °. These transmission parameters can meet the technical requirements of an aircraft engine based on a compact structure, which are small in size, light in weight and large in carrying capacity. The test shows that the planetary gear system having such a structure can provide high power density, and can greatly improve the carrying capacity and the high-speed dynamic characteristics. In addition, vibration and noise of the transmission system are very low during operation at high speeds and heavy loads.
    Since the housing of the reduction gear according to the present invention is provided with mounting seats, the installation of the reduction gear becomes reliable. At the same time it reduces the error that transmission pairs carry the weight of the reduction gear itself.
    BRIEF DESCRIPTION OF THE FIGURES
    [0022]
    Fig. 1 is a main view of the planetary reduction gear of the present invention.
    Fig. 2 is a perspective view of the planetary reduction gear according to the present invention.
    DESCRIPTION OF THE PREFERRED EMBODIMENTS
    Fig. 1 is a main view of the planetary reduction gear of the present invention. As shown in FIG. 1, the planetary reduction gear includes mainly: an input shaft 1, a planetary gear unit 2, a housing 3, an inner gear ring unit 4, and output shaft 5. In this embodiment, the input shaft 1 and the output shaft 5 are coaxially arranged. The housing 3 includes the planetary gear unit 2 and the inner gear ring unit 4, and carries the input shaft 1 and the output shaft 5. The input shaft 1 and the output shaft 5 extend outwardly from the housing 3, respectively, to be connected to the power source and the load, respectively ,
    In the embodiment shown in Fig. 1, the housing 3 comprises the first end cover 301, the middle part 302 and the second end cover 303. The first end cover 301 and the second end cover 303 are respectively fixed, for example by bolts on the middle part 302 to form the rigid housing 3.
    One end of the input shaft 1 extends outwardly from the first end cover 301 to the outside of the housing 3 along the axis of the input shaft 1 to be connected to the power source. The input shaft 1 is supported by a bearing 6 in the first end cover 301. The input shaft 1 is equipped with a gear 101. The gear 101 may comprise a complete gear, or two or more gears, which are spaced along the axis of the input shaft 1. The gear 101 may be a spur gear or a helical gear / screw-wheel. In the embodiment shown in the figure, the gear 101 is composed of two parts, the first input shaft gear 1011 and the second input shaft gear 1012. In this embodiment, the first input shaft gear 1011 and the second input shaft gear 1012 are helical / helical gears, and both are against each other tilted to form a Pfeilradgetriebe on the input shaft 1. In the embodiment, all gears are designed with the following parameters: modulus 4 mm-6 mm, helix angle is 25 <β <30, contact angle 22.5 ° -25 °. The helical gear with such parameters can transmit large torques under the premise of a compact structure and small dimensions. For example: An input power of 15 000 kW can be tolerated if the maximum diameter of a transmission system is only 580 mm, the input speed is 7500 r / min. This transmission system has higher power density. The carrying capacity and high-speed dynamics of this transmission system are obviously increased, and vibration noises are very low when the transmission system is operated under high speed and heavy load conditions. It is of particular importance to aerospace engines as aviation engine gearboxes require light weight, small dimensions and high power density. The transmission with these parameters fully meets the requirements of aircraft engines.
    In the embodiment shown in FIG. 1, three different sets of planetary gear units 2 are provided. Of course, more planet gears 2 may be provided based on the actual load of the reduction gear. As shown in the figure, the planetary gear units 2 include a Planetenradwelle 201, a planetary gear 202 and a bearing 203. The planetary gear 202 is supported by the bearing 203 on the planetary shaft 201. The planetary shaft 201 is fixedly mounted on the housing 3, in particular on the first end closure 301. The planetary shafts 201 are arranged uniformly at equal angular intervals on the housing 3 or the first end closure 301. The planetary gear 202 is a hollow cylinder. Two interlocking gearing parts, i. the first planetary gear 2021 and the second planetary gear 2022 are disposed on the outer surface of the same hollow cylinder along the direction of the shaft of the hollow cylinder. These two planetary gears may be spur gears or helical gears / helical gears, wherein in the embodiment shown in the figure, a helical gear is used. A transition section is disposed between the first planetary gear 2021 and the second planetary gear 2022 and the diameter of the transition section is smaller than the diameter of the tip of the first planetary gear 2021 and the second planetary gear 2022. There are a plurality of planetary through holes 2023 in the transition section. These through holes serve as passageways for lubricants through which lubricant flows circulatory into the reduction gear to lubricate the various parts of the reduction gear.
    In the embodiment of FIG. 1, the inner gear ring unit 4 includes the first inner gear ring unit 401 and the second inner gear ring unit 402. The first inner gear ring unit 401 and second inner gear ring unit 402 are each constructed as a stepped-stepping cylinder. The first engagement gear 4011 and the second engagement gear 4021 are disposed on the inner surface of the first inner gear ring member 401 and the second inner gear ring unit 402, respectively. The first engagement gear 4011 and the second engagement gear 4021 may be spur gears or helical gears. In this embodiment, a helical gear is used. The first engagement gear 4011 and the second engagement gear 4021 are used to engage the first planetary gear 2021 and the second planetary gear 2022, respectively. The first inner gear ring flange 4012 and the second inner gear ring flange 4022 are disposed on the lower ends of the first inner gear ring unit 401 and the second inner gear ring unit 402, respectively. on the larger diameters with stepped heel shape. In this embodiment, both diameters of the first inner gear ring flange 4012 and the second inner gear ring flange 4022 are identical. The first inner ring gear flange 4012 and the second inner ring gear flange 4022 are mounted to each other. The communication holes are disposed on the first inner gear ring flange 4012 and the second inner gear ring flange 4022, and the bolts pass through the connection holes to connect these flanges with each other. A plurality of inner gear ring through holes 8 are disposed on the first inner gear ring unit 401 and the second inner gear ring unit 402 and distributed along the circumference of the inner gear ring to form a lubricant passageway. The inner gear passage holes 8 may be complete openings on the first inner gear ring unit 401 and the second inner gear ring unit 402, or may be openings arranged in a manner that a part of the through holes on the first inner gear ring unit 401 and another part the second inner gear ring unit 402 is positioned. The complete holes are formed after the assembly of the reduction gear and after both inner gear ring units are combined with each other.
    In the embodiment, the first gear ring flange 4012 and the second gear ring flange 4022 are fixed and connected together to transmit a torque. This structure reduces the requirements for the accuracy of the manufacturing process, and at the same time, a larger torque can be transferred.
    In the embodiment according to FIG. 1, the output shaft 5 is arranged on the left side of the planetary reduction gear, as shown in FIG. 1, and supported on the housing 3 by the output shaft bearing 9, more concretely, on the second end closure 303 The left end of the output shaft 5 protrudes outward from the second end shutter 303 to be connected to the load. The output shaft 5 and the input shaft 1 are coaxial.
    The output shaft 5 is a cylinder with stepped shoulder shape, with one end of the cylinder (the right end shown in FIG. 1) provided with an output shaft flange 501. The output shaft flange 501 is connected to the plate 502 by means of a portion of a hollow, circular cylinder 504. A concave cavity 503 is provided on the connecting part between the picking circular cylinder 504 and the output end 505 of the output shaft 5 to receive and support the end of the input shaft 1. As shown in FIG. 1, one end of the input shaft 1 is held on the concave cavity 503 by means of an input shaft bearing 7. The position of the output shaft 5 is strong and stable because it is held by the output shaft bearing 9 in the housing 3. An end of the input shaft 1 is held on the output shaft 5, so that it can be avoided that the input shaft 1 is formed as a cantilever, and the stability and the storage capacity of the structure can be increased.
    权利要求:
    Claims (8)
    [1]
    Fig. 2 shows the shape of a planetary reduction gear according to the present invention. It is shown that the shape of the planetary reduction gear is cylindrical and equipped with holding parts for fixing the entire reduction gear. The mounting seats 304 are provided on the housing 3. The mounting seats 304 are on the housing 3, more specifically on the central part 302, uniformly at the same angular distances angeord-net / distributed. The mounting seats 304 are in the form of I-shaped structures. The mounting seats 304 allow the planetary reduction gear to be strongly and stably supported. Compared to the prior art in which the entire planetary speed reducer is completely supported by the input shaft and the output shaft, the reliability and the load applied to the transmission parts or elements are substantially improved. The overall dimensions and weight of the planetary reduction gear according to the present invention are obviously reduced since a conventional planet carrier is not used. This is crucial for aircraft engines. The inner gear rings are connected by the flanges, so that the production is simplified on the one hand, the strength of the connection and the carrying capacity on the other side are increased. Providing through holes on the inner gear rings and the planetary gears results in the lubricant flowing smoothly so that the entire reduction gear and all parts or elements can be fully lubricated. claims
    A planetary reduction gear comprising an input shaft (1), a planetary gear unit (2), a housing (3), an inner gear ring unit (4) and an output shaft (5); wherein a gear (101) extending along an axial direction of the input shaft (1) is provided on an end of the input shaft (1); a planetary gear unit (2) including a planetary gear shaft (201), a planetary gear (202) and a planetary gear bearing (203) for supporting the planetary gear (202); the inner gear ring unit (4) comprises a first inner gear ring unit (401) and a second inner gear ring unit (402), the first inner gear ring unit (401) and the second inner gear ring unit (402) each having first engagement teeth (4011) and second gears Engaging teeth (4021), and a first inner gear ring flange (4012) and a second inner gear ring flange (4022); the output shaft (5) has an output shaft flange (501) securely connected to the first inner gear ring flange (4012) and the second inner gear ring flange (4022), the input shaft (1) and the output shaft (5) rotatably mounted on the housing (3 ), the planetary gear shaft (201) is securely connected to the housing (3).
    [2]
    The planetary reduction gear according to claim 1, characterized in that the first inner gear ring flange (4012) and the second inner gear ring flange (4022) extend radially outward along the first inner gear ring unit (401) and the second inner gear ring unit (402), wherein the first inner ring gear flange (4012) and the second inner ring gear flange (4022) are secured together.
    [3]
    3. Planetary reduction gear according to claim 1, characterized in that the planetary reduction gear at least three planetary gear units (2), the planetary gear (202) is a hollow cylinder with the first planetary gear (2021) and the second planetary gear (2022) on the outer sides of the Hollow cylinder with a spacer along the axis of the planet gear (202) are arranged, wherein the first planetary gear (2021) and the second planetary gear (2022) with the gear of the input shaft (101), the first engagement toothing (4011) and the second engagement toothing ( 4021) are engaged.
    [4]
    4. Planetary reduction gear according to one of claims 1 to 3, characterized in that the first engagement toothing (4011) and the second engagement toothing (4021) are helical / helical gears which extend obliquely and in the direction of the axis of the input shaft (1) wherein the first planetary gear teeth (2021) and the second planetary gear teeth (2022) are helical / bevel gears respectively engaging the first engaging gear (4011) and the second engaging gear (4021), the input shaft gear (101) (1) has two helical gears including the first helical gear (101) engaged with the first engagement gear (4011) and the second helical gear (102) connected to the second engagement gear (4021) in FIG Intervention is.
    [5]
    The planetary reduction gear according to claim 1, characterized in that the output shaft (5) is a stepped cylinder having an output shaft flange (501), a plate (502), a concave cavity (503), a hollow cylinder section (504) and an output member (505) wherein the output shaft flange (501) is securely connected to the inner gear ring unit (4), one end of the input shaft (1) being supported by the input shaft bearing (7) on the concave cavity (503) of the output shaft (5); 5) is mounted on the second end closure (303) of the housing (3) by an output shaft bearing (9).
    [6]
    6. planetary reduction gearbox according to one of claims 1 to 5, characterized in that at least one planetary through-hole (203) extending through the wall of the hollow cylindrical planetary gear (202) on the planetary gear (202) between the first planetary gear (2021) and the second planet gear (2022), and at least one through hole (403) of the inner gear ring is provided on the first inner gear ring unit (401) and the second inner gear ring unit (402), respectively.
    [7]
    7. planetary reduction gear according to one of claims 1 to 5, characterized in that the gear (101), the planetary gear (202), the first engagement toothing (4011) and the second engagement toothing (4021) with modulus 4 mm-6 mm, skew / Screw angle 25 <ß <30, are formed, the pressure angle is 22.5 ° -25 °.
    [8]
    8. planetary reduction gear according to claim 1, characterized in that at least three I-shaped mounting seats (304) on the housing (3) are arranged in a circular direction at an equal angular distance.
    类似技术:
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    同族专利:
    公开号 | 公开日
    CN106438865B|2019-07-23|
    CN106438865A|2017-02-22|
    引用文献:
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    SE358716B|1971-10-18|1973-08-06|Stal Laval Turbin Ab|
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    CN204459093U|2014-11-27|2015-07-08|南京星能传动机械有限责任公司|A kind of gas turbine herringbone toothing epicyclic gearbox|
    CN205226243U|2015-12-14|2016-05-11|赣州五环机器股份有限公司|Helical gear planet gear|
    法律状态:
    2019-08-15| PCAR| Change of the address of the representative|Free format text: NEW ADDRESS: HERISAUERSTRASSE 81, 9200 GOSSAU SG (CH) |
    2020-05-15| AZW| Rejection (application)|
    优先权:
    申请号 | 申请日 | 专利标题
    CN201611107909.2A|CN106438865B|2016-12-06|2016-12-06|Planetary reduction gear|
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