WO2019071427A1 - 中空型内摆线行星减速器 - Google Patents

中空型内摆线行星减速器 Download PDF

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Publication number
WO2019071427A1
WO2019071427A1 PCT/CN2017/105517 CN2017105517W WO2019071427A1 WO 2019071427 A1 WO2019071427 A1 WO 2019071427A1 CN 2017105517 W CN2017105517 W CN 2017105517W WO 2019071427 A1 WO2019071427 A1 WO 2019071427A1
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WO
WIPO (PCT)
Prior art keywords
hole
planetary reducer
output portion
hypocycloid
input
Prior art date
Application number
PCT/CN2017/105517
Other languages
English (en)
French (fr)
Inventor
何凯
王钰堃
毛贺
柳冠伊
俞灏
Original Assignee
深圳先进技术研究院
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 深圳先进技术研究院 filed Critical 深圳先进技术研究院
Priority to JP2019569812A priority Critical patent/JP6764042B2/ja
Priority to PCT/CN2017/105517 priority patent/WO2019071427A1/zh
Publication of WO2019071427A1 publication Critical patent/WO2019071427A1/zh

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H1/00Toothed gearings for conveying rotary motion
    • F16H1/28Toothed gearings for conveying rotary motion with gears having orbital motion
    • F16H1/32Toothed gearings for conveying rotary motion with gears having orbital motion in which the central axis of the gearing lies inside the periphery of an orbital gear
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H57/00General details of gearing
    • F16H57/08General details of gearing of gearings with members having orbital motion

Definitions

  • This application belongs to the field of mechanical equipment or robot technology, and more particularly to a hollow type oscillating planetary reducer.
  • the mainstream cycloidal planetary reducer generally uses an external cycloidal wheel for eccentric motion to achieve a deceleration function.
  • This type of reducer structure is generally output using a planet carrier, an output disk or a pinion disk (or a pin holder).
  • the cycloidal wheel of the epicycloid reducer is externally meshed with the pin gear, and the inside of the cycloidal wheel is engaged with the eccentric shaft (or the eccentric sleeve) to realize the eccentric motion, thereby causing the outer cycloidal planetary reducer.
  • the internal structure is complex and difficult to process.
  • An object of the present invention is to provide a hollow type hypocycloid planetary reducer, which solves the technical problem that the internal structure of the epicycloid planetary reducer existing in the prior art is complicated and difficult to process.
  • a hollow type hypocycloid planetary reducer comprising: a cage; a plurality of crankshafts, wherein a plurality of crankshafts are rotatably mounted on the cage , the input shaft end and the eccentric shaft section are arranged on each crank shaft; the input part, the gear teeth on the input part mesh with the gear teeth on the input shaft end, and the input part is provided with the first through center hole; the cycloidal wheel, the pendulum
  • the wire wheel is provided with a central through hole and a plurality of assembly through holes, and the plurality of crank shafts pass through the assembly through holes one by one, and the eccentric shaft segments are assembled at the assembly through holes, and the center holes of the central through holes are provided therein.
  • Cycloid gear output portion, the output portion is rotatably mounted on the cage, the output portion is provided with a cycloidal tooth and a second through hole, and the output portion passes through the center through hole of the cycloidal wheel, and
  • the cycloidal teeth mesh with the inner cycloidal teeth, and the central axis of the first through central bore is coaxial with the central axis of the second through central bore.
  • the end portion of the output portion is provided with a fitting end groove
  • the end portion of the input portion is inserted into the fitting end groove
  • the first assembly is provided between the groove peripheral wall of the fitting end groove and the end outer wall of the input portion.
  • Bearing, hollow hypocycloid The planetary reducer further includes a sealing baffle disposed in the second through center hole, and the first assembled bearing is located between the input portion and the sealing baffle.
  • a sealing fitting is disposed between the output portion and the retainer, and a sealing ring mounting groove for mounting the 0-type sealing ring is disposed on the outer side wall of the retaining frame.
  • the output portion is provided with a lubrication flow passage for circulating lubricating oil
  • the input port and the output port of the lubrication flow passage are provided with a pipe thread sealing screw hole, and the pipe thread sealing screw is sealed by the pipe thread sealing screw. Inside the hole to achieve sealing.
  • the outer cycloidal tooth is a cylindrical pin gear, and the outer wall of the output portion is provided with a pin tooth mounting groove, the cylindrical pin tooth is placed in the pin tooth mounting groove, and the cylindrical pin tooth protrudes from the pin tooth mounting groove portion.
  • An engaging portion with the outer cycloidal teeth is formed.
  • the epicycloid tooth is a convex structure on the outer wall of the output portion, and the convex structure is integrally formed with the output portion.
  • each of the crankshafts is provided with two eccentric shaft segments, and the eccentric shaft segments have an eccentric direction of 180° with respect to the central axis of the crankshaft.
  • the number of the plurality of crankshafts is two, and the two crankshafts are symmetrically disposed with respect to the central axis of the cycloidal wheel.
  • the cage includes a first cage and a second cage, the first cage and the second cage are sealingly connected to form an assembly space, and the eccentric shaft section of the crankshaft, the cycloidal wheel, and the output section are three The assembly is connected to the assembly space.
  • a first sealing fitting is disposed between the first retainer and the output portion
  • a second sealing fitting is disposed between the second retainer and the output portion, the eccentric shaft segment of the crankshaft, the cycloidal wheel, and the output
  • the assembly connection portion between the three parts is located between the first sealing fitting, the second sealing fitting and the cage.
  • the hollow hypocycloid planetary reducer can be made into a compact hollow structure, which is mainly due to the meshing form of the inner cycloidal teeth of the cycloidal wheel and the outer cycloidal teeth of the output portion.
  • the needle teeth are located inside the cycloidal wheel, and the center position of the output portion of the pin teeth distribution can be used to make a hollow structure, that is, a second through hole.
  • the hollow structure utilizes a structure in which the inner cycloidal teeth of the cycloidal wheel mesh with the outer cycloidal teeth of the output portion The advantage is that it can make full use of the space without increasing the complexity of the overall structure of the reducer.
  • the hollow hypocycloid planetary reducer can realize a very compact structure and reduce the axial dimension, which is important for improving the rigidity of the crankshaft and the like and the overall structural rigidity of the reducer.
  • the innovative structure of the hollow hypocycloid planetary reducer can make full use of the structural advantages to achieve a larger hollow ratio and a better hollow transmission effect.
  • FIG. 1 is a schematic structural view of a crankshaft of a hollow type hypocycloid planetary reducer according to an embodiment of the present application
  • FIG. 2 is a cross-sectional view of a hollow type hypocycloid planetary reducer in an axial direction according to an embodiment of the present invention
  • FIG. 3 is an input of a hollow type hypocycloid planetary reducer according to an embodiment of the present application; Schematic diagram of the cooperation relationship between the portion and the input shaft end of the crankshaft;
  • FIG. 4 is a schematic structural view of a crankshaft of a hollow type hypocycloid planetary reducer according to an embodiment of the present application
  • FIG. 5 is a cross-sectional view of a cycloidal wheel of a hypocycloid planetary reducer according to an embodiment of the present application
  • FIG. 6 is a cross-sectional view of an output portion of a hypocycloid planetary reducer according to an embodiment of the present application. [0022] FIG.
  • FIG. 7 is a schematic view showing an assembly structure of a hypocycloid planetary reducer according to an embodiment of the present application.
  • FIG 8 is a schematic view showing the assembly of the hypocycloid planetary reducer in a view direction perpendicular to the axial direction according to an embodiment of the present application.
  • first and second are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated.
  • features defining “first” and “second” may explicitly or implicitly include one or more of the features.
  • the meaning of “plurality” is two or more unless specifically and specifically defined.
  • the hypocycloid planetary reducer of the present embodiment includes a cage 10, an input portion 30, a cycloidal wheel 40, an output portion 50, and a plurality of crankshafts 20, a plurality of crankshafts.
  • 20 is rotatably mounted on the retainer 10
  • each crankshaft 20 is provided with an input shaft end 21 and an eccentric shaft section 22, the teeth on the input portion 30 mesh with the teeth on the input shaft end 21, and the input portion 30
  • a first through hole 31 is formed in the direction of the central axis of the input portion 30.
  • the cycloid 40 is provided with a central through hole 401 and a plurality of mounting through holes 402.
  • the plurality of crank shafts 20 are worn one by one.
  • the through hole 402 is assembled, and the eccentric shaft portion 22 is assembled at the assembly through hole 402.
  • the center of the hole through the hole 401 is provided with a hypocycloid tooth 41.
  • the output portion 50 is rotatably mounted on the holder 10, and the output is output.
  • the outer portion of the cycloidal wheel 40 is disposed through the central portion of the output portion 50.
  • the central axis passing through the center hole 52 is coaxially disposed (the central axis of the first through center hole 31 is the central axis of the input portion 30, and the central axis of the second through center hole 52 is the central axis of the output portion 50).
  • the hypocycloid planetary reducer transmits and transmits power through the input portion 30, and the input shaft end 21 of the crankshaft 20 and the input portion 30 are engaged by gear teeth, thereby The number of teeth of the input shaft end 21 is greater than the number of teeth of the input portion 30, that is, the transmission ratio between the input portion 30 and the crank shaft 20 is less than 1, thereby realizing the first stage reduction transmission, and the crank shaft 20 is rotated about its own axis, so that the crank shaft The eccentric shaft segment 22 on the 20 rotates the cycloidal wheel 40 to revolve around the central axis of the output portion 50.
  • the inner cycloidal tooth 41 and the output portion 50 on the cycloidal wheel 40 The upper epicycloid tooth 51 is engaged, and under the interaction force between the inner cycloidal tooth 41 and the epicycloid tooth 51, the cycloidal wheel 40 rotates around its own axis in the opposite direction of the revolution. Movement, and the output portion 50 also rotates about its own axis in a direction opposite to the direction in which the cycloidal wheel 40 rotates (the cymbal holder 10 is fixedly disposed, and the output portion 50 is used as a power output power component, A holder support member 10 is fixed to be explained), so that, to achieve the second-stage reduction gear wheel 40 through the transmission process cycloidal output section 50.
  • first through hole center hole 31 and the second through hole hole 52 are respectively formed in the input portion 30 and the output portion 50, the layout control can be inserted in the first through hole 31 and the second through hole 52.
  • Lines or hydraulic oil control lines, etc. facilitate the use of the mechanical design of the planetary reducer or the wiring design of the robot, which is beneficial to optimize the design of the mechanical equipment or the overall structure of the robot, and further realize the miniaturization design of the mechanical equipment or the robot.
  • the portion 50 is provided with a first through hole 31 and a second through hole 52, so that the arrangement of the relevant circuit layout or the hydraulic oil control line is further optimized, thereby facilitating the miniaturization of the overall structure of the reducer, and decelerating through a total of two stages.
  • the transmission design further reduces the transmission ratio between the input portion 30 and the output portion 50, realizes a reduction drive with a large difference between the input rotational speed and the output rotational speed, and the hypocycloid planetary reducer is compared with the prior art cycloidal type In the case of planetary reducers, the internal design is simplified and the difficulty of the machining process is reduced.
  • the epicycloid tooth 51 is a cylindrical pin.
  • the outer wall of the output portion 50 is provided with a pin mounting groove, and the cylindrical pin is placed in the pin mounting groove. A portion of the cylindrical pin protruding from the pin mounting groove forms an engaging portion with the epicycloid tooth 51.
  • the pendulum planetary reducer the pendulum The reel 40 revolves around the central axis of the cycloidal wheel 40 as the eccentric shaft section 22 of the crankshaft 20 rotates.
  • the inner cycloidal tooth 41 and the epicycloidal tooth 51 of the cycloidal wheel 40 There is an interaction force between them.
  • the cycloidal wheel 40 performs the rotation motion under the action of the interaction force, and during the rotation movement of the cycloidal wheel 40, the output portion 50 also rotates under the action of the interaction force.
  • the self-rotation motion of the own axis and the power input to the input unit 30 are transmitted after being decelerated and raised.
  • the epicycloid tooth 51 on the output portion 50 is a cylindrical pin mounted in the pin mounting groove
  • the cylindrical pin is in the process of interaction of the inner cycloidal teeth 41 of the cycloidal wheel
  • the cylindrical pin The teeth also roll in the mounting groove, that is, during the operation of the hypocycloid planetary reducer, the cylindrical pin teeth and the groove wall of the pin tooth mounting groove generate sliding friction, while the outer cycloidal gear teeth 51 and the inner There is also relative sliding friction between the cycloidal teeth 41 during the meshing process, resulting in loss during power transmission.
  • the present embodiment can also adopt the epicycloid tooth 51 as shown in FIG. 5 and FIG. 6 as a convex structure on the outer wall of the output portion 50 (the convex structure) It is an epicycloidal tooth on the outer peripheral wall of the output portion 50, and the shape of the cross-sectional contour of each convex tooth is a semicircular shape, and the distance between two adjacent teeth is the width of one tooth)
  • the protruding structure is integrally formed with the output portion 50. Therefore, no relative motion friction is generated between the epicycloid tooth 51 and the output portion 50, compared with the design of the cylindrical pin gear 51 which is mounted in the pin mounting groove.
  • the number of the plurality of crankshafts 20 in the present embodiment is an even number, and the even-numbered crankshafts 20 are symmetrically disposed with respect to the central axis of the cycloidal wheel 40, and each of the crankshafts 20 is provided with two eccentric shafts. Segment 22, and on the same crankshaft 20, the eccentricity of the two eccentric shaft segments 22 relative to the central axis of the crankshaft 20 is 180°, as shown in FIG. Accordingly, the number of the cycloidal wheels 40 fitted to the eccentric shaft section 22 is two.
  • the two cycloidal wheels 40 are yawed at 180° with respect to the central axis of the output portion 50, so that the outer cycloidal teeth 51 of the output portion 50 can be received.
  • the force from the inner cycloidal teeth 41 is balanced with each other, and the stability of the output power of the output portion 50 can be maintained.
  • the number of the plurality of crankshafts 20 is two, and the two crankshafts 20 are symmetrically disposed with respect to the central axis of the cycloidal wheel 40.
  • the sealing design of the hypocycloid planetary reducer is simplified. Therefore, a sealing fitting is disposed between the output portion 50 and the retainer 10.
  • the outer side wall of the retainer 10 is provided with a sealing ring mounting groove for mounting a 0-type sealing ring. 82. Install the hypocycloid planetary reducer into the corresponding mechanical tooling system or the robot arm for the reduction drive, and then install the 0-type seal ring and the external mounting shell of the mechanical tooling system in the seal ring mounting groove 82.
  • the outer mounting housing of the robot arm forms a sealed assembly to seal the hypocycloid planetary reducer in the direction of the input.
  • the rotation output is always stable during the rotation.
  • the end portion of the output portion 50 is provided with a fitting end groove, the end portion of the input portion 30 is inserted into the fitting end groove, and the first assembly bearing 61 is disposed between the groove peripheral wall of the fitting end groove and the end outer wall of the input portion 30.
  • the hollow hypocycloid planetary reducer further includes a sealing baffle 70 disposed in the second through center hole 52, and the first assembly bearing 61 is located between the input portion 30 and the sealing baffle 70.
  • a sealing baffle 70 By blocking the sealing baffle 70, it is possible to block the leakage of the lubricating substance (for example, lubricating or grease) from the second through center hole 52, and the assembled sealing baffle 70 forms a fit with the O-ring, thereby assembling The process can complete the sealing operation on the input side.
  • the entire hollow type hypocycloid planetary reducer can be effectively sealed by simply sealing the output side.
  • the output portion 50 is provided with a lubrication flow passage for circulating the lubricating oil, and the input port and the output port of the lubrication flow passage are provided with a pipe thread sealing screw hole, and the pipe thread sealing screw (not shown) is sealed and disposed on the pipe thread. Seal the screw holes to achieve a seal.
  • the retainer 10 includes a first retainer 11 and a second retainer 12, the first retainer 11 and the second retainer 12 are sealingly connected to form an assembly space, the eccentric shaft section 22 of the crankshaft 20, the cycloidal wheel 40,
  • the output portion 50 is assembled and connected in the assembly space, and a first sealing fitting 811 is disposed between the first holder 11 and the output portion 50, and a second portion is disposed between the second holder 12 and the output portion 50.
  • the seal fitting 812, the eccentric shaft section 22 of the crankshaft 20, the cycloidal wheel 40, and the output portion 50 are disposed between the first seal fitting 811, the second seal fitting 812, and the retainer 10.
  • hypocycloid planetary reducer For a single hypocycloid planetary reducer, use a pipe threaded sealing screw, first dense The sealing fitting 811 and the second sealing fitting 812 form a sealing assembly operation of the inner cycloidal planetary reducer from one side of the output end, and the hypocycloid planetary reducer of the present embodiment is compared with a single epicycloid in the prior art.
  • the reducer must be sealed from both the input and output directions.
  • the hypocycloid planetary reducer simplifies the form of the seal assembly operation of a single reducer, thus facilitating the staff's internal cycloidal planetary reducer.
  • the assembly work that is, the second holder 12 and the output portion 50 are coupledly coupled by the third assembly bearing 63, and are located at the output portion 50 and the second holder 12 through the second seal fitting 812, the crank shaft 20, and the cycloidal wheel 40.
  • the output side is sealed on one side.
  • the hollow hypocycloid planetary reducer can realize one-side sealing on the output side, and it is not necessary to add a sealing structure outside the output side (the sealing between the 0-ring and the external mounting housing is added on the input side), thereby The output structure can be more diverse and the application will be more extensive.
  • the end portion of the output portion 50 is fitted not only to the end portion of the input portion 30 by the first fitting bearing 61, but also to the outer wall of the end portion of the output portion 50 with the second fitting bearing 62.
  • the second assembly bearing 62 is fixedly mounted on the first holder 11, and a third assembly bearing 63 is disposed between the output portion 50 and the second holder 12, such that the output portion 50 passes through the first assembly bearing 61, the second assembly
  • the cooperative support between the bearing 62 and the third assembled bearing 63 makes the output portion 50 always stable during the rotational motion transmitting the output power, and ensures the coaxiality of the hypocycloid planetary reducer as a whole. And stiffness.
  • the first crankshaft 20 is mounted on the cage 10 by a fourth assembly bearing 64 and a fifth assembly bearing 65, and the second crankshaft 20 is passed through a sixth assembly bearing 66 and Seven assembly bearings 67 are mounted on the cage 10.
  • a support bearing is fitted between the shaft wall of the eccentric shaft section 22 of each crankshaft 20 and the hole wall of the fitting through hole 402 of the cycloidal wheel 40, so that the eccentric shaft section 22 and the cycloidal wheel
  • the relative rotation between the assembly through holes 402 of 40 is smooth.
  • the shaft wall of the eccentric shaft section 22 and the hole wall of the fitting through hole 402 of the cycloidal wheel 40 can also be correspondingly lubricated by a hydrostatic bearing, thereby reducing the axial wall of the eccentric shaft section 22 and the fitting through hole 04. Wear between the walls of the holes.
  • the teeth on the input shaft end 21 of the crankshaft 20 may be arranged to provide a tapered wire tooth directly on the end of the crankshaft 20, as shown in FIG. 4, corresponding to the input portion 30.
  • the twisted teeth are engaged and the first stage is decelerated during the transmission; or, as shown in Figures 3, 7 and 8, the planetary gear 90 is mounted on the end of the crankshaft 20, the planetary gear 90 and The ends of the crankshaft 20 are splined with the corresponding spline grooves
  • the first stage of deceleration is achieved by the teeth on the planet gears 90 meshing with the teeth of the input portion 30.
  • the output portion 50 may be fixedly mounted as a fixed support point of the hypocycloid planetary reducer. Thereafter, power is input from the input portion 30, and the power passes through the teeth of the input portion 30 and the crankshaft 20.
  • the gear drive of the input shaft end 21 realizes the first-stage deceleration, and then the rotation of the cage 10 is rotated by the revolving and rotation of the cycloidal wheel 40 to realize the second-stage deceleration, and the crucible holder 10 is used as a power output component and utilized.
  • the output unit 50 is opposite to the output rotation direction of the output unit 50 when the output unit 50 is used as the power output unit as the power output unit.
  • hypocycloid planetary reducer provided by the technical solution has the following advantages:
  • the hypocycloid planetary reducer changes the external meshing form of the conventional cycloidal wheel and the pin gear into an internal meshing form through structural innovation.
  • This innovation in the form and structure of the internal meshing causes the outer cycloidal teeth 51 of the output portion 50 to be located inside the cycloidal wheel 40 to mesh with the hypocycloidal teeth 41, and the internal structure of the cycloidal wheel 40 is simplified.
  • the overall design and processing of the hypocycloid planetary reducer is simplified.
  • the inner cycloidal planetary reducer has a structural innovation, which reduces the axial dimension of the crankshaft 20, the stiffness increasing port, and the overall rigidity and life of the hypocycloid planetary reducer. At the same time, the reduced axial dimension of the hypocycloid planetary reducer makes the structure of the hypocycloid planetary reducer more compact.
  • the hypocycloid planetary reducer is a fourth assembly bearing 64 and a fifth assembly bearing 65 (sixth assembly bearing 66 and seventh assembly bearing 67) that are coupled to the end of the crankshaft 20 in the conventional structure by structural innovation.
  • the output portion 50 is placed outside the bearing hole (outside in the axial direction)
  • the output portion 50 and the second holder 12 are coupled by a bearing and an oil seal, and the seal of the oil seal realizes an effective output side seal
  • the output portion 50 of the hypocycloid planetary reducer is designed, and the cooperation between the output portion 50 and the second holder 12 is used to achieve sealing on the output side.
  • a sealing seal groove of a radial 0-ring seal is placed on the first retainer 11, and the seal is achieved by cooperation with an external input structure.
  • a lubrication flow path is designed on the output portion 50, and the lubricating oil is injected and discharged to the hypocycloid planetary reducer by lubricating the oil hole of the flow path. And sealed by a pipe threaded sealing screw. Sealing is possible without the need for an external structure, making the output structure more versatile.
  • the pendulum planetary reducer has the following advantages: the compact structure, the overall rigidity of the reducer is good, and the service life is long; theoretical research shows that the output of the hypocycloid planetary reducer is more stable; The structure of the inner cycloidal teeth 41 of the cycloidal wheel 40 has no complicated internal structure, making the cycloidal wheel easier to machine.

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Abstract

一种中空型内摆线行星减速器,包括:保持架(10)、输入部(30)、摆线轮(40)、输出部(50)以及多个曲柄轴(20),各个曲柄轴(20)上设有输入轴端(21)和偏心轴段(22),输入部(30)上的轮齿与输入轴端(21)上的轮齿相啮合,输入部(30)设有第一贯穿中心孔(31),摆线轮(40)上设有中心通孔(401)和多个装配通孔(402),多个曲柄轴(20)一一对应地穿过装配通孔(402),且偏心轴段(22)装配于装配通孔(402)处,中心通孔(401)的孔壁上设有内摆线轮齿(41),输出部(50)上设有外摆线轮齿(51)和第二贯穿中心孔(52),输出部(50)穿过中心通孔(401),且外摆线轮齿(51)与内摆线轮齿(41)相啮合,并且第一贯穿中心孔(31)的中心轴线与第二贯穿中心孔(52)的中心轴线为同轴设置。应用本技术方案能够解决现有技术中存在的外摆线行星减速器的内部结构复杂、加工困难的技术问题。

Description

中空型内摆线行星减速器 技术领域
[0001] 本申请属于机械设备或机器人技术领域, 更具体地说, 是涉及一种中空型内摆 线行星减速器。
背景技术
[0002] 目前主流摆线行星减速器一般采用外摆线轮来做偏心运动来实现减速功能。 这 种减速器结构一般采用行星架、 输出盘或者针齿盘 (或针齿保持架) 输出。
[0003] 现有技术中, 外摆线减速器中摆线轮与针齿外啮合, 摆线轮内部要与偏心轴 ( 或偏心套) 配合实现偏心运动, 这样就导致外摆线行星减速器的内部结构比较 复杂, 加工困难。
技术问题
[0004] 本申请的目的在于提供一种中空型内摆线行星减速器, 以解决现有技术中存在 的外摆线行星减速器的内部结构复杂、 加工困难的技术问题。
问题的解决方案
技术解决方案
[0005] 为实现上述目的, 本申请采用的技术方案是: 提供一种中空型内摆线行星减速 器, 包括: 保持架; 多个曲柄轴, 多个曲柄轴可转动地安装在保持架上, 各个 曲柄轴上设有输入轴端和偏心轴段; 输入部, 输入部上的轮齿与输入轴端上的 轮齿相啮合, 输入部设有第一贯穿中心孔; 摆线轮, 摆线轮上设有中心通孔和 多个装配通孔, 多个曲柄轴一一对应地穿过装配通孔, 且偏心轴段装配于装配 通孔处, 中心通孔的孔壁上设有内摆线轮齿; 输出部, 输出部可转动地安装于 保持架上, 输出部上设有外摆线轮齿和第二贯穿中心孔, 输出部穿过摆线轮的 中心通孔, 且外摆线轮齿与内摆线轮齿相啮合, 并且第一贯穿中心孔的中心轴 线与第二贯穿中心孔的中心轴线为同轴设置。
[0006] 进一步地, 输出部的端部上设有装配端槽, 输入部的端部插入装配端槽内, 且 装配端槽的槽周壁与输入部的端部外壁之间设有第一装配轴承, 中空型内摆线 行星减速器还包括密封挡板, 密封挡板设置于第二贯穿中心孔内, 且第一装配 轴承位于输入部与密封挡板之间。
[0007] 进一步地, 输出部与保持架之间设有密封配件, 保持架的外侧壁上设有用于安 装 0型密封圈的密封圈安装槽。
[0008] 进一步地, 输出部上设有用于流通润滑油液的润滑流道, 且润滑流道的输入口 与输出口设置管螺纹密封螺钉孔, 通过管螺纹密封螺钉密封设置于管螺纹密封 螺钉孔内以实现密封。
[0009] 进一步地, 外摆线轮齿为圆柱针齿, 输出部的外壁上设有针齿安装槽, 圆柱针 齿放置于针齿安装槽内, 圆柱针齿突出于针齿安装槽的部分形成与外摆线轮齿 的啮合部分。
[0010] 进一步地, 外摆线轮齿为输出部的外壁上的凸起结构, 凸起结构与输出部一体 成型。
[0011] 进一步地, 各个曲柄轴上设有两个偏心轴段, 两个偏心轴段之间相对于曲柄轴 的中心轴线的偏心方向呈 180°。
[0012] 进一步地, 多个曲柄轴的数量为两个, 两个曲柄轴相对于摆线轮的中心轴线对 称设置。
[0013] 进一步地, 保持架包括第一保持架和第二保持架, 第一保持架和第二保持架密 封连接形成装配空间, 曲柄轴的偏心轴段、 摆线轮、 输出部三者之间装配连接 于装配空间内。
[0014] 进一步地, 第一保持架与输出部之间设有第一密封配件, 第二保持架与输出部 之间设有第二密封配件, 曲柄轴的偏心轴段、 摆线轮、 输出部三者之间装配连 接部分位于第一密封配件、 第二密封配件和保持架之间。
发明的有益效果
有益效果
[0015] 该中空型内摆线行星减速器能够很好的做成紧凑的中空结构, 这主要得益于摆 线轮的内摆线轮齿与输出部的外摆线轮齿的啮合形式, 针齿位于摆线轮内侧, 且针齿分布的输出部的中心位置可以用来制成中空结构, 即第二贯穿中心孔。 这种中空结构利用摆线轮的内摆线轮齿与输出部的外摆线轮齿之间啮合的结构 优势, 能够充分利用空间而不增加减速器整体结构的复杂性。 并且该中空型内 摆线行星减速器可以实现非常紧凑的结构, 减小轴向尺寸, 这对提高曲柄轴等 零件的刚度和减速器的整体结构刚度具有重要意义。 此外, 该中空型内摆线行 星减速器的创新结构可以充分利用结构优势, 实现较大的中空比例, 中空传输 效果更好。
对附图的简要说明
附图说明
[0016] 为了更清楚地说明本申请实施例中的技术方案, 下面将对实施例或现有技术描 述中所需要使用的附图作简单地介绍, 显而易见地, 下面描述中的附图仅仅是 本申请的一些实施例, 对于本领域普通技术人员来讲, 在不付出创造性劳动性 的前提下, 还可以根据这些附图获得其他的附图。
[0017] 图 1为本申请实施例的中空型内摆线行星减速器的曲柄轴的结构示意图;
[0018] 图 2为本申请实施例的中空型内摆线行星减速器的垂直于轴向方向的剖视图; [0019] 图 3为本申请实施例的中空型内摆线行星减速器的关于输入部与曲柄轴的输入 轴端之间的配合关系的结构示意图;
[0020] 图 4为本申请实施例的中空型内摆线行星减速器的曲柄轴的结构示意图;
[0021] 图 5为本申请实施例的内摆线行星减速器的摆线轮的剖视图;
[0022] 图 6为本申请实施例的内摆线行星减速器的输出部的剖视图;
[0023] 图 7为本申请实施例的内摆线行星减速器的装配结构示意图;
[0024] 图 8为本申请实施例的内摆线行星减速器的垂直于轴向方向的视图方向的装配 示意图。
[0025] 其中, 图中各附图标记:
[0026] 10、 保持架; 11、 第一保持架; 12、 第二保持架; 20、 曲柄轴; 21、 输入轴端 ; 22、 偏心轴段; 30、 输入部; 40、 摆线轮; 401、 中心通孔; 402、 装配通孔 ; 41、 内摆线轮齿; 50、 输出部; 51、 外摆线轮齿; 61、 第一装配轴承; 62、 第二装配轴承; 63、 第三装配轴承; 64、 第四装配轴承; 65、 第五装配轴承; 6 6、 第六装配轴承; 67、 第七装配轴承; 811、 第一密封配件; 812、 第二密封配 件; 82、 密封圈安装槽; 90、 行星齿轮; 31、 第一贯穿中心孔; 52、 第二贯穿 中心孔; 70、 密封挡板。 本发明的实施方式
[0027] 为了使本申请所要解决的技术问题、 技术方案及有益效果更加清楚明白, 以下 结合附图及实施例, 对本申请进行进一步详细说明。 应当理解, 此处所描述的 具体实施例仅仅用以解释本申请, 并不用于限定本申请。
[0028] 需要说明的是, 当元件被称为 "固定于"或"设置于"另一个元件, 它可以直接在 另一个元件上或者间接在该另一个元件上。 当一个元件被称为是 "连接于"另一个 元件, 它可以是直接连接到另一个元件或间接连接至该另一个元件上。
[0029] 需要理解的是, 术语"长度"、 "宽度"、 "上"、 "下"、 "前"、 "后"、 "左"、 "右"、 "竖直"、 "水平"、 "顶"、 "底"、 "内"、 "外"等指示的方位或位置关系为基于附图 所示的方位或位置关系, 仅是为了便于描述本申请和简化描述, 而不是指示或 暗示所指的装置或元件必须具有特定的方位、 以特定的方位构造和操作, 因此 不能理解为对本申请的限制。
[0030] 此外, 术语"第一"、 "第二 "仅用于描述目的, 而不能理解为指示或暗示相对重 要性或者隐含指明所指示的技术特征的数量。 由此, 限定有 "第一"、 "第二 "的特 征可以明示或者隐含地包括一个或者更多个该特征。 在本申请的描述中, "多个" 的含义是两个或两个以上, 除非另有明确具体的限定。
[0031] 如图 1至图 8所示, 本实施例的内摆线行星减速器包括保持架 10、 输入部 30、 摆 线轮 40、 输出部 50和多个曲柄轴 20, 多个曲柄轴 20可转动地安装在保持架 10上 , 各个曲柄轴 20上设有输入轴端 21和偏心轴段 22, 输入部 30上的轮齿与输入轴 端 21上的轮齿相啮合, 输入部 30上设有沿输入部 30的中心轴线方向贯通的第一 贯穿中心孔 31, 摆线轮 40上设有中心通孔 401和多个装配通孔 402, 多个曲柄轴 2 0一一对应地穿过装配通孔 402, 且偏心轴段 22装配于装配通孔 402处, 中心通孔 401的孔壁上设有内摆线轮齿 41, 输出部 50可转动地安装于保持架 10上, 输出部 50上设有外摆线轮齿 51和第二贯穿中心孔 52, 其中, 第二贯穿中心孔 52沿着输 出部 50的中心轴线方向贯通设置, 输出部 50穿过摆线轮 40的中心通孔 401, 且外 摆线轮齿 51与内摆线轮齿 41相啮合, 并且第一贯穿中心孔 31的中心轴线与第二 贯穿中心孔 52的中心轴线为同轴设置 (第一贯穿中心孔 31的中心轴线即为输入 部 30的中心轴线, 第二贯穿中心孔 52的中心轴线即为输出部 50的中心轴线) 。
[0032] 该内摆线行星减速器在工作过程中, 通过输入部 30将动力进行传递输送, 并且 曲柄轴 20的输入轴端 21与输入部 30之间通过轮齿啮合而实现传动, 此处输入轴 端 21的轮齿数大于输入部 30的轮齿数, 即输入部 30与曲柄轴 20之间的传动比小 于 1, 从而实现第一级减速传动, 曲柄轴 20绕自身轴线转动, 使得曲柄轴 20上的 偏心轴段 22转动带动摆线轮 40绕输出部 50的中心轴线进行公转, 在摆线轮 40进 行公转的过程中, 摆线轮 40上的内摆线轮齿 41与输出部 50上的外摆线轮齿 51实 现啮合, 在内摆线轮齿 41与外摆线轮齿 51之间的相互作用力的作用下, 摆线轮 4 0绕自身轴线进行与公转方向相反的自转运动, 并且输出部 50也同吋绕自身轴线 进行与摆线轮 40自转方向相反的自转转动 (此吋保持架 10为固定设置, 输出部 5 0作为动力输出动力部件, 以下均以保持架 10作为固定设置的支撑件为了进行说 明) , 这样, 通过摆线轮 40对输出部 50的传动过程实现了第二级减速传动。 并 且, 由于输入部 30与输出部 50上分别对应地幵有第一贯穿中心孔 31、 第二贯穿 中心孔 52, 从而能够在第一贯穿中心孔 31和第二贯穿中心孔 52中穿插布设控制 线路或者液压油控制管线等等, 便于使用该行星减速器的机械设备或机器人的 布线设计, 有利于优化设计机械设备或者机器人整体结构, 进一步实现机械设 备或者机器人的小型化设计。 通过设计摆线轮 40的内摆线轮齿 41与输出部 50的 外摆线轮齿 51之间的啮合装配, 使得摆线轮 40的结构设计实现小型化, 并且通 过在输入部 30、 输出部 50设置第一贯穿中心孔 31、 第二贯穿中心孔 52, 使得相 关线路布设或者液压油控制管线的布设进一步实现优化, 从而有利于减速器整 体结构的小型化布局, 并且通过总共两级减速传动设计, 进一步降低输入部 30 与输出部 50之间的传动比, 实现输入转速与输出转速的差值较大的减速传动, 并且该内摆线行星减速器相对于现有技术的摆线型行星减速器而言, 其内部设 计结构得到简化, 并且降低了加工工艺的困难程度。
[0033] 在本实施例中, 外摆线轮齿 51为圆柱针齿, 如图 2所示, 输出部 50的外壁上设 有针齿安装槽, 圆柱针齿放置于针齿安装槽内, 圆柱针齿突出于针齿安装槽的 部分形成与外摆线轮齿 51的啮合部分。 在内摆线行星减速器工作的过程中, 摆 线轮 40随着曲柄轴 20的偏心轴段 22转动而绕摆线轮 40的中心轴线进行公转, 在 工装的同吋, 摆线轮 40的内摆线轮齿 41与外摆线轮齿 51之间会产生相互作用力 , 此吋, 摆线轮 40在相互作用力的作用下进行自转运动, 而配合摆线轮 40的自 转运动过程中, 输出部 50也在相互作用力的作用下绕自身轴线进行自转运动而 将输入部 30输入的动力经减速升矩后继续传递。 由于输出部 50上的外摆线轮齿 5 1是安装于针齿安装槽内的圆柱针齿, 该圆柱针齿在于摆线轮 40的内摆线轮齿 41 相互作用的过程中, 圆柱针齿也会在安装凹槽内滚动, 也即在内摆线行星减速 器工作的过程中, 圆柱针齿与针齿安装槽的槽壁产生滑动摩擦, 而同吋外摆线 轮齿 51与内摆线轮齿 41之间在啮合过程中也存在相对滑动摩擦, 从而造成了动 力传递过程中的损耗。
[0034] 为了进一步减少动力传递过程中的损耗, 本实施例也可以采用如图 5和图 6所示 的外摆线轮齿 51为输出部 50的外壁上的凸起结构 (该凸起结构是输出部 50的外 周壁上的外摆线形轮齿, 每个凸起的轮齿的横截面轮廓的形状为一个半圆形状 , 相邻两个轮齿之间的距离为一个轮齿的宽度) , 凸起结构与输出部 50—体成 型。 此吋, 外摆线轮齿 51与输出部 50之间不再产生任何的相对运动摩擦, 与上 述的外摆线轮齿 51是安装在针齿安装槽内的圆柱针齿的设计形式相比, 在一体 成型设计外摆线轮齿 51与输出部 50的设计形式中, 摆线轮 40与输出部 50之间仅 仅存在内摆线轮齿 41与外摆线轮齿 51相啮合过程中产生的滑动摩擦损耗, 减少 了圆柱针齿在针齿安装槽内的滑动摩擦损耗, 因此进一步提高动力传递的效率
[0035] 本实施例中的多个曲柄轴 20的数量为偶数个, 并且偶数个曲柄轴 20之间相对于 摆线轮 40的中心轴线对称设置, 各个曲柄轴 20上设有两个偏心轴段 22, 并且在 同一个曲柄轴 20上, 两个偏心轴段 22之间相对于曲柄轴 20的中心轴线的偏心方 向呈 180°, 如图 4所示。 相应地, 配合安装在偏心轴段 22上的摆线轮 40的数量为 两个, 在摆线轮 40公转、 自转的过程中, 由于各个曲柄轴 20上的两个偏心轴段 2 2的偏心方向之间呈 180°, 则两个摆线轮 40公转吋是吋刻处于相对于输出部 50的 中心轴线呈 180°偏摆, 这样就能够使输出部 50的外摆线轮齿 51所受到的来自内摆 线轮齿 41的作用力相互平衡, 就能够保持输出部 50输出动力的稳定性。 具体地 , 在本实施例中, 多个曲柄轴 20的数量为两个, 两个曲柄轴 20相对于摆线轮 40 的中心轴线对称设置。
如图 1所示, 为了对该内摆线行星减速器实现从输出部 50的单侧进行密封操作 , 从而相比于现有技术中需要从输入侧以及输出侧两侧同吋进行密封操作而言 简化该内摆线行星减速器的密封设计结构, 因此, 输出部 50与保持架 10之间设 有密封配件, 保持架 10的外侧壁上设有用于安装 0型密封圈的密封圈安装槽 82, 在将该内摆线行星减速器安装至相应的机械工装系统或机器人手臂中进行减速 传动, 此吋通过在密封圈安装槽 82中安装 0型密封圈与机械工装系统的外部安装 壳体或机器人手臂的外部安装壳体形成密封装配, 从而对该内摆线行星减速器 在输入端方向上的密封设置。 在使得保持架 10的外侧壁通过 0型密封圈与外部安 装壳体之间形成密封装配的同吋, 为了能够使输出部 50获得更加稳定的支撑, 在转动输出的过程中始终保持稳定, 因此, 输出部 50的端部上设有装配端槽, 输入部 30的端部插入装配端槽内, 且装配端槽的槽周壁与输入部 30的端部外壁 之间设有第一装配轴承 61, 并且中空型内摆线行星减速器还包括密封挡板 70, 密封挡板 70设置于第二贯穿中心孔 52内, 且第一装配轴承 61位于输入部 30与密 封挡板 70之间。 通过密封挡板 70的阻挡, 则可以阻挡润滑物质 (例如润滑有或 润滑脂) 从第二贯穿中心孔 52进行泄漏, 并且装配完成的密封挡板 70与 0型密封 圈形成配合, 从而在装配过程即可完成对输入端侧的密封操作, 在使用过程中 , 只需对输出侧进行密封操作即可对整个中空型内摆线行星减速器实现有效的 密封操作。 因此, 输出部 50上设有用于流通润滑油液的润滑流道, 且润滑流道 的输入口与输出口设置管螺纹密封螺钉孔, 通过管螺纹密封螺钉 (未图示) 密 封设置于管螺纹密封螺钉孔内以实现密封。 进一步地, 保持架 10包括第一保持 架 11和第二保持架 12, 第一保持架 11和第二保持架 12密封连接形成装配空间, 曲柄轴 20的偏心轴段 22、 摆线轮 40、 输出部 50三者之间装配连接于装配空间内 , 并且, 第一保持架 11与输出部 50之间设有第一密封配件 811, 第二保持架 12与 输出部 50之间设有第二密封配件 812, 曲柄轴 20的偏心轴段 22、 摆线轮 40、 输出 部 50三者之间装配连接部分位于第一密封配件 811、 第二密封配件 812和保持架 1 0之间。 因此, 对于单个内摆线行星减速器而言, 利用管螺纹密封螺钉、 第一密 封配件 811和第二密封配件 812形成了对内摆线行星减速器从输出端单侧进行密 封装配操作, 本实施的内摆线行星减速器相对于现有技术中单个外摆线形式的 行星减速器必须从输入端和输出端两个方向进行密封装配操作而言, 该内摆线 行星减速器简化了单个减速器的密封装配操作的形式, 从而简便了工作人员对 内摆线行星减速器的装配工作, 即第二保持架 12与输出部 50通过第三装配轴承 6 3联接传动, 并且通过第二密封配件 812、 曲柄轴 20和摆线轮 40位于输出部 50和 第二保持架 12内侧, 实现输出侧方向单侧密封。 该中空型内摆线行星减速器可 以实现输出侧进行单侧密封, 不需要在输出侧外部增加密封结构件 (在输入侧 增加了 0型密封圈与外部安装壳体之间进行密封) , 从而输出结构可以更加多样 , 应用将更加广泛。
[0037] 如图 1所示, 输出部 50的端部不仅通过第一装配轴承 61配合在输入部 30的端部 上, 而且输出部 50的端部的外壁设置有第二装配轴承 62, 该第二装配轴承 62固 定安装在第一保持架 11上, 另外, 输出部 50与第二保持架 12之间设有第三装配 轴承 63, 这样输出部 50通过第一装配轴承 61、 第二装配轴承 62和第三装配轴承 6 3三者之间的配合支撑, 使得输出部 50在转动运动传递输出动力的过程中能够始 终保持稳定, 并确保了该内摆线行星减速器整体的同轴度和刚度。 本实施例的 两个曲柄轴 20中, 第一个曲柄轴 20通过第四装配轴承 64和第五装配轴承 65安装 在保持架 10上, 第二个曲柄轴 20通过第六装配轴承 66和第七装配轴承 67安装在 保持架 10上。
[0038] 在本实施例中, 各个曲柄轴 20的偏心轴段 22的轴壁与摆线轮 40的装配通孔 402 的孔壁之间装配有支撑轴承, 使得偏心轴段 22与摆线轮 40的装配通孔 402之间相 对转动平顺。 当然, 偏心轴段 22的轴壁与摆线轮 40的装配通孔 402的孔壁之间也 可以采用静压轴承进行相应润滑支撑, 从而减少偏心轴段 22的轴壁与装配通孔 4 02的孔壁之间的磨损。
[0039] 曲柄轴 20的输入轴端 21上的轮齿可以设置为直接在曲柄轴 20的端部上设置渐幵 线式的轮齿, 如图 4所示, 与输入部 30上相应的渐幵线式轮齿相啮合, 并在传动 过程中实现第一级减速; 或者, 如图 3、 图 7和图 8所示, 在曲柄轴 20的端部上装 配行星齿轮 90, 行星齿轮 90与曲柄轴 20的端部之间通过花键与相应的花键槽相 配合, 通过行星齿轮 90上的轮齿与输入部 30的轮齿相啮合而实现第一级减速。
[0040] 另外, 也可以将输出部 50进行固定安装以作为该内摆线行星减速器的固定支撑 点, 此吋, 从输入部 30输入动力, 动力经过输入部 30的轮齿与曲柄轴 20的输入 轴端 21的轮齿传动实现第一级减速, 然后在通过摆线轮 40的公转、 自转带动保 持架 10转动并实现第二级减速, 此吋保持架 10作为动力输出部件, 与利用输出 部 50作为动力输出部件相比, 利用保持架 10作为动力输出部件吋候的输出转动 方向与输出部 50的输出转动方向相反。
[0041] 综合而言, 本技术方案提供的内摆线行星减速器具有以下优点:
[0042] 1、 该内摆线行星减速器通过结构创新将传统的摆线轮与针齿的外啮合形式改 进为内啮合形式。 这种内啮合形式和结构的创新使得输出部 50的外摆线轮齿 51 位于摆线轮 40的内侧与内摆线轮齿 41相啮合, 并使得摆线轮 40的内部结构得到 简化, 从而简化了内摆线行星减速器的整体设计加工。
[0043] 2、 该内摆线行星减速器通过结构创新, 将曲柄轴 20的轴向尺寸变小, 刚度增 力口, 内摆线行星减速器的整体刚度和寿命也得到提高。 同吋, 内摆线行星减速 器的轴向尺寸减小使得该内摆线行星减速器的结构更加紧凑。
[0044] 3、 该内摆线行星减速器通过结构创新将传统结构中曲柄轴 20端头处联接的第 四装配轴承 64、 第五装配轴承 65 (第六装配轴承 66和第七装配轴承 67) 内置于 保持架 10内, 并且将输出部 50放置于轴承孔外侧 (沿轴线方向的外侧) , 输出 部 50与第二保持架 12通过轴承和油封联接, 油封的密封实现有效的输出侧密封
[0045] 4、 该内摆线行星减速器设计的输出部 50, 以及输出部 50与第二保持架 12之间 的配合来实现输出侧的密封。 对于输入侧, 在第一保持架 11上幵有径向的 0型密 封圈的密封安装槽, 通过与外部的输入结构的配合来实现密封。 对于输出侧, 在输出部 50上设计了润滑流道, 通过润滑流道的油孔来实现对该内摆线行星减 速器的润滑油注入和排出。 并且通过管螺纹密封螺钉密封。 不需要外部结构就 可以进行密封, 使得输出结构更加多样性。
[0046] 5、 该内摆线行星减速器除了上述优点之外, 还具有: 结构紧凑, 减速器整体 刚度好, 使用寿命长; 理论研究显示, 该内摆线行星减速器的输出更加稳定; 摆线轮 40的内摆线轮齿 41结构没有复杂的内部结构, 使得摆线轮更易于加工。 以上所述实施例仅用以说明本发明的技术方案, 而非对其限制; 尽管参照前述 实施例对本发明进行了详细的说明, 本领域的普通技术人员应当理解: 其依然 可以对前述各实施例所记载的技术方案进行修改, 或者对其中部分技术特征进 行等同替换; 而这些修改或者替换, 并不使相应技术方案的本质脱离本发明各 实施例技术方案的精神和范围, 均应包含在本发明的保护范围之内。

Claims

权利要求书
[权利要求 1] 一种中空型内摆线行星减速器, 其特征在于, 包括:
保持架 (10) ;
多个曲柄轴 (20) , 多个所述曲柄轴 (20) 可转动地安装在所述保持 架 (10) 上, 各个所述曲柄轴 (20) 上设有输入轴端 (21) 和偏心轴 段 (22) ;
输入部 (30) , 所述输入部 (30) 上的轮齿与所述输入轴端 (21) 上 的轮齿相啮合, 所述输入部 (30) 设有第一贯穿中心孔 (31) ; 摆线轮 (40) , 所述摆线轮 (40) 上设有中心通孔 (401) 和多个装 配通孔 (402) , 多个所述曲柄轴 (20) —一对应地穿过所述装配通 孔 (402) , 且所述偏心轴段 (22) 装配于所述装配通孔 (402) 处, 所述中心通孔 (401) 的孔壁上设有内摆线轮齿 (41) ;
输出部 (50) , 所述输出部 (50) 可转动地安装于所述保持架 (10) 上, 所述输出部 (50) 上设有外摆线轮齿 (51) 和第二贯穿中心孔 ( 52) , 所述输出部 (50) 穿过所述摆线轮 (40) 的中心通孔 (401) , 且所述外摆线轮齿 (51) 与所述内摆线轮齿 (41) 相啮合, 并且所 述第一贯穿中心孔 (31) 的中心轴线与所述第二贯穿中心孔 (52) 的 中心轴线为同轴设置。
[权利要求 2] 如权利要求 1所述的中空型内摆线行星减速器, 其特征在于, 所 述输出部 (50) 的端部上设有装配端槽, 所述输入部 (30) 的端部插 入所述装配端槽内, 且所述装配端槽的槽周壁与所述输入部的端部外 壁之间设有第一装配轴承 (61) , 所述中空型内摆线行星减速器还包 括密封挡板 (70) , 所述密封挡板 (70) 设置于所述第二贯穿中心孔 (52) 内, 且所述第一装配轴承 (61) 位于所述输入部 (30) 与所述 密封挡板 (70) 之间。
[权利要求 3] 如权利要求 2所述的中空型内摆线行星减速器, 其特征在于, 所 述输出部 (50) 与所述保持架 (10) 之间设有密封配件, 所述保持架 (10) 的外侧壁上设有用于安装 0型密封圈的密封圈安装槽 (82) 。 如权利要求 3所述的中空型内摆线行星减速器, 其特征在于, 所 述输出部 (50) 上设有用于流通润滑油液的润滑流道, 且所述润滑流 道的输入口与输出口设置管螺纹密封螺钉孔, 通过管螺纹密封螺钉密 封设置于所述管螺纹密封螺钉孔内以实现密封。
如权利要求 1所述的中空型内摆线行星减速器, 其特征在于, 所 述外摆线轮齿 (51) 为圆柱针齿, 所述输出部 (50) 的外壁上设有针 齿安装槽, 所述圆柱针齿放置于所述针齿安装槽内, 所述圆柱针齿突 出于所述针齿安装槽的部分形成与所述外摆线轮齿 (51) 的啮合部分 如权利要求 1所述的中空型内摆线行星减速器, 其特征在于, 所 述外摆线轮齿 (51) 为所述输出部 (50) 的外壁上的凸起结构, 所述 凸起结构与所述输出部 (50) —体成型。
如权利要求 5或 6所述的中空型内摆线行星减速器, 其特征在于 , 各个所述曲柄轴 (20) 上设有两个所述偏心轴段 (22) , 两个所述 偏心轴段 (22) 之间相对于所述曲柄轴 (20) 的中心轴线的偏心方向 呈 180。。
如权利要求 7所述的中空型内摆线行星减速器, 其特征在于, 多 个所述曲柄轴 (20) 的数量为两个, 两个所述曲柄轴 (20) 相对于所 述摆线轮 (40) 的中心轴线对称设置。
如权利要求 4所述的中空型内摆线行星减速器, 其特征在于, 所 述保持架 (10) 包括第一保持架 (11) 和第二保持架 (12) , 所述第 一保持架 (11) 和所述第二保持架 (12) 密封连接形成装配空间, 所 述曲柄轴 (20) 的偏心轴段 (22) 、 所述摆线轮 (40) 、 所述输出部 (50) 三者之间装配连接于所述装配空间内。
如权利要求 9所述的中空型内摆线行星减速器, 其特征在于, 所 述第一保持架 (11) 与所述输出部 (50) 之间设有第一密封配件 (81 1) , 所述第二保持架 (12) 与所述输出部 (50) 之间设有第二密封 配件 (812) , 所述曲柄轴 (20) 的偏心轴段 (22) 、 所述摆线轮 (4 0) 、 所述输出部 (50) 三者之间装配连接部分位于所述第一密封配 件 (811 ) 、 所述第二密封配件 (812) 和所述保持架 (10) 之间。
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