WO2019044233A1 - Dispositif de décélération - Google Patents

Dispositif de décélération Download PDF

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Publication number
WO2019044233A1
WO2019044233A1 PCT/JP2018/026956 JP2018026956W WO2019044233A1 WO 2019044233 A1 WO2019044233 A1 WO 2019044233A1 JP 2018026956 W JP2018026956 W JP 2018026956W WO 2019044233 A1 WO2019044233 A1 WO 2019044233A1
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WO
WIPO (PCT)
Prior art keywords
rotation
reduction gear
carrier
hole
planetary gear
Prior art date
Application number
PCT/JP2018/026956
Other languages
English (en)
Japanese (ja)
Inventor
智大 植木
鵜沢　信夫
Original Assignee
日立建機株式会社
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 日立建機株式会社 filed Critical 日立建機株式会社
Priority to KR1020197035868A priority Critical patent/KR102234967B1/ko
Priority to JP2019539046A priority patent/JP6715393B2/ja
Priority to CN201880052479.XA priority patent/CN111033081A/zh
Publication of WO2019044233A1 publication Critical patent/WO2019044233A1/fr

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/04—Features relating to lubrication or cooling or heating
    • F16H57/0467—Elements of gearings to be lubricated, cooled or heated
    • F16H57/0479—Gears or bearings on planet carriers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/62—Constructional features or details
    • B66C23/84—Slewing gear
    • B66C23/86—Slewing gear hydraulically actuated
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H1/00—Toothed gearings for conveying rotary motion
    • F16H1/28—Toothed gearings for conveying rotary motion with gears having orbital motion
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/02—Gearboxes; Mounting gearing therein
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/04—Features relating to lubrication or cooling or heating

Definitions

  • the present invention relates to a reduction gear device suitable for use in, for example, a hydraulic shovel, a traveling device of a hydraulic crane, and the like.
  • a tracked vehicle such as a hydraulic shovel is capable of raising and lowering to a front side of an upper revolving body, an upper revolving body rotatably mounted on the traveling body, and a traveling body capable of self-propelled by a traveling device. It is roughly configured by the provided working device.
  • the traveling device includes a stationary side housing fixed to one side in the front and rear directions of side frames fixed to the left and right of a track frame of a traveling body, a rotation source attached to the stationary side housing, and a stationary side housing A rotation-side housing rotatably supported and attached with a sprocket meshing with a traveling track, a rotation shaft axially inserted in the fixed-side housing between the rotation source and the rotation-side housing, and And a planetary gear mechanism for decelerating the rotation and transmitting it to the rotation side housing.
  • a reduction gear capable of obtaining a large reduction ratio can be obtained by providing a plurality of, for example, three, planetary gear mechanisms. What was known.
  • the first stage planetary gear mechanism is provided on the other end side of the rotating shaft and one end side of the rotating shaft splined to the output shaft of the rotating source.
  • a first planetary gear that is disposed to mesh with the first sun gear, the first sun gear, and an internal gear provided on the inner circumferential side of the rotary housing, and revolves around the first sun gear while rotating.
  • a first carrier rotatably supporting the first planetary gear.
  • the second stage planetary gear mechanism is loosely fitted on the rotation shaft, and meshes with the second sun gear to which the revolution of the first carrier is transmitted, the second sun gear, and the internal gear of the rotation side housing.
  • a second planetary gear which is disposed and revolves around the second sun gear while rotating, is provided with a second carrier that rotatably supports the second planetary gear.
  • the third stage (final stage) planetary gear mechanism is loosely fitted to the rotation shaft, and the third sun gear to which the revolution of the second carrier is transmitted, the third sun gear, and the internal gear of the rotation side housing
  • a third carrier rotatably disposed around the second sun gear, and a third carrier rotatably supporting the third planetary gear, the third carrier having a fixed housing Mounted in a non-rotating state.
  • the rotation is determined by the first stage planetary gear mechanism including the first sun gear, the first planetary gear, the first carrier, etc. And the revolution of the first planetary gear is output from the first carrier to the second sun gear of the second stage planetary gear mechanism.
  • the second stage planetary gear mechanism consisting of the second sun gear, the second planetary gear, the second carrier, etc. further decelerates the rotation from the first carrier at a predetermined reduction ratio, and only the revolution of the second planetary gear Is output from the second carrier to the third sun gear of the final stage planetary gear mechanism.
  • the final stage planetary gear mechanism consisting of the third sun gear, the third planetary gear, the third carrier, etc., rotates from the second carrier because the third carrier is non-rotatably attached to the fixed side housing
  • the power can be transmitted from the third sun gear to the rotary housing through the third planetary gear while decelerating the output at a predetermined reduction ratio, and a large rotary torque can be generated in the rotary housing.
  • lubricating oil for lubricating the planetary gear mechanism is usually filled in the inside of the rotary side housing, and this lubricating oil reaches a position passing through the central axis of the sun gear of the planetary gear mechanism. It is filled.
  • the oil surface of the lubricating oil has a small stirring and scattering action of the lubricating oil due to the rotation of the planetary gear mechanism.
  • the lower part of the spline joint of the shaft and the rotating shaft will continue to be immersed in the lubricating oil.
  • the present invention has been made from the circumstances of the prior art as described above, and an object thereof is to provide a rotary source and a rotary shaft even if the rotary side housing is rotated at high speed for a long time without increasing the filling amount of lubricating oil.
  • An object of the present invention is to provide a reduction gear that can stably supply lubricating oil to a spline joint.
  • the reduction gear transmission of the present invention comprises a fixed side housing, a rotation source provided to the fixed side housing, a rotation side housing rotatably supported by the fixed side housing, and one end And a plurality of planetary gear mechanisms for decelerating the rotation of the rotation shaft and transmitting the rotation shaft to the rotation side housing.
  • the carrier of the planetary gear mechanism of the final stage is fixedly supported by the fixed side housing, and the planetary gear of the final stage is mounted on the carrier
  • a supply path is provided opposite the meshing portion of the sun gear and the planetary gear of the mechanism, and the meshing of the sun gear and the planetary gear with the rotation of the rotation source is provided. It is characterized in that the lubricant adhering is supplied to the spline coupling portion of the rotary shaft and the rotational source through the supply path to the department.
  • lubricating oil can be stably supplied to the spline connection portion between the rotation source and the rotation shaft even if the rotation side housing is rotated at high speed for a long time.
  • FIG. 2 is a cross-sectional view of a traveling device provided in a traveling body as viewed in the direction of arrows II-II in FIG. 1; It is a principal part enlarged view of a traveling device shown in FIG. BRIEF DESCRIPTION OF THE DRAWINGS It is sectional drawing which shows the principal part of the retarding apparatus which concerns on the 1st Embodiment of this invention. It is explanatory drawing seen from the arrow A direction of FIG.
  • FIG. 1 is a front view of a hydraulic shovel which is a typical example of a construction machine, and this hydraulic shovel 1 is mounted on a traveling type 2 of crawler type (crawler type) capable of self-propelled and on the traveling body 2 so as to turn.
  • the upper swing body 3 and the working device 4 provided on the front side of the upper swing body 3 so as to be able to move up and down are generally configured, and the work device 4 is used to perform an excavation operation and the like. .
  • the traveling body 2 is provided with a track frame 5 as a base, and the track frame 5 has left and right side frames 5A (only the left side is shown) extending in the front and rear directions.
  • An idler wheel 6 is provided at one end side in the longitudinal direction of each side frame 5A, and a traveling device 9 described later is provided at the other end side in the longitudinal direction of each side frame 5A.
  • An endless crawler belt (crawler) 8 is wound around the driving wheel (sprocket) 7 and the idler wheel 6 of the traveling device 9.
  • FIG. 2 is a cross-sectional view of the traveling device 9 as viewed in the direction of arrows II-II in FIG. 1, and FIG. 3 is an enlarged view of an essential part of the traveling device 9 shown in FIG.
  • the traveling device 9 includes a hydraulic motor 12, a reduction gear 14, a fixed housing 15, a rotating housing 17, a rotating shaft 24, and the like. Stages, for example, three stage planetary gear mechanisms 23, 31, 37, etc. are included.
  • the traveling device 9 reduces the rotation of the hydraulic motor 12 by the reduction gear 14 to rotate the drive wheel 7 with a large torque, and the crawler belt 8 wound between the drive wheel 7 and the idle wheel 6 is It is driven to go around.
  • the hydraulic motor 12 which is a rotation source rotationally drives the cylindrical output shaft 13 by being supplied with pressure oil from a hydraulic pump (not shown).
  • a hole-side spline portion 13A is provided on the inner peripheral surface of the output shaft 13, and the hole-side spline portion 13A and an axial-side spline portion 24A, which will be described later, of the rotating shaft 24 are splined (see FIG. 3). .
  • the fixed housing 15 has a cylindrical portion 15A, a bottom portion 15B, and a lid portion 15C, and the hydraulic motor 12 is accommodated therein.
  • An annular collar portion 15D is integrally formed on the outer peripheral side of the cylindrical portion 15A, and the collar portion 15D is fixed to the side frame 5A using a bolt or the like.
  • a shaft-side spline portion 15E is provided on the outer peripheral side of the cylindrical portion 15A, and the shaft-side spline portion 15E and a hole-side spline portion 40B of a third carrier 40 of the final stage described later are spline-connected.
  • an output shaft 13 is rotatably installed at a central portion of the bottom portion 15B, and the output of the hydraulic motor 12 is transmitted to the rotating shaft 24 from the output shaft 13.
  • the rotating side housing 17 is generally constituted by a drum main body 10 located on the outer peripheral side of the fixed side housing 15, a drum 11 provided with an internal gear 11A on the inner peripheral side, and a bottom lid 16 for closing the drum 11 closed. ing.
  • the drum body 10 is rotatably supported by the cylindrical portion 15A of the fixed housing 15 via a main bearing 50, and the main bearing 50 is axially positioned by a bearing nut 25 attached to the tip end of the fixed housing 15 It is done.
  • a mechanical seal (floating seal) 20 is provided on the outer side of the main bearing 50, and the mechanical seal 20 seals lubricating oil 43 described later, which is filled in the rotation side housing 17.
  • an annular collar portion 10A is integrally formed on the outer peripheral side of the drum main body 10, and a driving wheel (sprocket) 7 engaged with the crawler belt 8 is fixed to this collar portion 10A using a bolt 18. .
  • the axial length of the traveling device 9 is set shorter than the width dimension of the crawler belt 8 so that the entire traveling device 9 fits within the width dimension of the crawler belt 8.
  • the drum 11 is fixed to the drum main body 10 using a bolt 19, and an inner gear 11A is provided on the inner peripheral side of the drum 11 with which first to third planetary gears 27, 33, 39 to be described later mesh. ing.
  • the bottom lid 16 is fixed to the open end of the drum 11 using a bolt 21. Inside the bottom lid 16, a liner 22 located at the axial center and in sliding contact with the tip surface of the first sun gear 26 described later. Is fitted.
  • the reduction gear 14 decelerates the rotation of the hydraulic motor 12 and transmits it to the rotation side housing 17.
  • the fixed side housing 15, the rotation side housing 17, the first stage planetary gear mechanism 23, the second stage planetary gear It comprises the mechanism 31, the planetary gear mechanism 37 of the third stage (final stage), and the like.
  • the first stage planetary gear mechanism 23 decelerates the rotation of the hydraulic motor 12 and transmits it to the second stage planetary gear mechanism 31.
  • the rotation shaft 24, the first sun gear 26, the first planetary gear 27, It comprises the first carrier 28 and the like.
  • the shaft-side spline portion 24A is provided on the base end side of the rotary shaft 24, and as described above, the shaft-side spline portion 24A is splined to the hole-side spline portion 13A provided on the output shaft 13 of the hydraulic motor 12. It is combined. That is, the rotating shaft 24 is disposed coaxially with the output shaft 13 of the hydraulic motor 12 and rotates integrally with the output shaft 13 of the hydraulic motor 12.
  • the first sun gear 26 is provided on the tip end side of the rotary shaft 24, and the first planetary gear 27 is engaged with the first sun gear 26 and the internal gear 11A provided on the inner peripheral side of the drum 11. .
  • the first planetary gears 27 revolve while rotating around the first sun gear 26.
  • three first planetary gears 27 are provided around the first sun gear 26 (only one is shown).
  • the first carrier 28 is a disk-shaped member having a diameter smaller than the tip diameter of the internal gear 11A, and has a shaft insertion hole through which the rotation shaft 24 is inserted at its center.
  • the first carrier 28 rotatably supports the respective first planetary gears 27 via the bearings 29 and the pins 30, and the respective first planetary gears 27 revolve around the first sun gear 26 while revolving. And the second sun gear 32 of the planetary gear mechanism 31 of the next stage.
  • the second stage planetary gear mechanism 31 decelerates the rotation of the first stage planetary gear mechanism 23 and transmits it to the third stage planetary gear mechanism 37.
  • the second sun gear 32 has, at its central portion, a shaft insertion hole through which the rotary shaft 24 is inserted, and the second sun gear 32 is splined to the first carrier 28 of the first stage.
  • a plurality of second planetary gears 33 are arranged to mesh with the second sun gear 32 and the internal gear 11A (only one is shown), and revolves around the second sun gear 32 while rotating.
  • the second carrier 34 is a disk-shaped member having a diameter smaller than the tip diameter of the internal gear 11A, and has a shaft insertion hole through which the rotation shaft 24 is inserted at its center.
  • the second carrier 34 rotatably supports the respective second planetary gears 33 via the bearings 35 and the pins 36, and the respective second planetary gears 33 revolve around the second sun gear 32 while revolving. , And transmits the revolution to the third sun gear 38 of the planetary gear mechanism 37 at the final stage.
  • the final stage (third stage) planetary gear mechanism 37 decelerates the rotation of the second stage planetary gear mechanism 31 and transmits it to the drum 11 of the rotation side housing 17.
  • the third sun gear 38, the third sun gear 38 It comprises the planetary gear 39, the third carrier 40, and the like.
  • the third sun gear 38 has, at its central portion, a shaft insertion hole through which the rotation shaft 24 is inserted, and the third sun gear 38 is splined to the second carrier 34 of the second stage.
  • the third planetary gear 39 is in mesh with the third sun gear 38 and the internal gear 11A, and a plurality, for example, three, of the third planetary gears 39 are disposed so as to rotate around the third sun gear 38 (only one is shown) .
  • the third carrier 40 is a disk-shaped member having a diameter smaller than the tip diameter of the internal gear 11A, and has a shaft insertion hole through which the rotation shaft 24 is inserted at its center.
  • the third carrier 40 rotatably supports the third planetary gears 39 via the bearings 41 and the pins 42, and the inner surface of the annular projection 40A which protrudes from the one end surface of the third carrier 40 to the hydraulic motor 12 side.
  • the hole-side spline portion 40B is formed in the.
  • the third carrier 40 is attached to the stationary housing 15 in a non-rotational state by spline-connecting the hole-side spline portion 40B and the shaft-side spline portion 15E of the stationary housing 15.
  • the rotation of the output shaft 13 corresponds to the first stage planet consisting of the rotating shaft 24, the sun gear 26, the first planetary gear 27, the first carrier 28, etc.
  • the gear mechanism 23 decelerates with a predetermined reduction ratio, and only the revolution of the first planetary gear 27 is output from the first carrier 28 to the second sun gear 32 of the second stage planetary gear mechanism 31.
  • the second stage planetary gear mechanism 31 including the second sun gear 32, the second planetary gear 33, the second carrier 34, etc. further decelerates the rotation from the first carrier 28 at a predetermined reduction ratio, and the second Only the revolution of the planetary gear 33 is output from the second carrier 34 to the third sun gear 38 of the planetary gear mechanism 37 of the final stage (third stage).
  • the third carrier 40 is attached to the stationary side housing 15 in a non-rotational state Therefore, the rotational output from the second carrier 34 is transmitted from the third sun gear 38 to the drum 11 via the third planetary gear 39 while decelerating at a predetermined reduction ratio.
  • the rotary housing 17 including the drum 11, the drum main body 10, the bottom cover 16 and the like rotates with a large torque, and the crawler belt 8 wound around the idler wheel 6 and the drive wheel 7 is circularly driven.
  • the shovel 1 travels.
  • lubricating oil 43 for smoothly driving the gears provided in the first to third planetary gear mechanisms 23, 31 and 37 is provided inside the rotation side housing 17.
  • the lubricating oil 43 is filled up to the vicinity of a horizontal plane passing through the central axis (the straight line P shown in FIG. 3) of the rotating shaft 24.
  • the oil surface of the lubricating oil 43 stirs the lubricating oil 43 by the rotation of the planetary gear mechanisms 23, 31, and 37. Since the scattering action is small, the lower part of the spline joint S (the joint between the hole side spline 13A and the shaft side spline 24A) of the output shaft 13 of the hydraulic motor 12 and the rotary shaft 24 continues to be immersed in the lubricating oil 43 become.
  • the lubricating oil 43 adheres to the internal gear 11A of the drum 11 by the action of viscosity and centrifugal force, and the oil level of the lubricating oil 43 drops accordingly. There is a possibility that the spline joint between the output shaft 13 and the rotary shaft 24 may be completely exposed from the oil surface of the lubricating oil 43.
  • the third carrier 40 of the final stage planetary gear mechanism 37 of the third sun gear 38 and the third planetary gear 39 is used.
  • a supply path 44 opposed to the meshing portion is provided.
  • the supply path 44 will be described in detail with reference to FIGS. 4 and 5.
  • FIG. 4 is a cross-sectional view showing the main part of the reduction gear transmission 14 according to the first embodiment provided in the traveling device 9, and FIG. 5 is an explanatory view seen from the arrow A direction in FIG.
  • the through hole 45 is bored in the third carrier 40 of the final stage, and the through hole 45 is between the cylindrical portion 15A of the fixed housing 15 and the third carrier 40.
  • the supply path 44 (see FIG. 3) is configured by the through holes 45 and the space portion 46.
  • the through hole 45 is formed in a long hole shape so as to face the meshing portion of the third sun gear 38 and the third planetary gear 39, and the through hole 45 is the inside of the rotary housing 17. Is located above the oil level of the lubricating oil 43 filled in the The space 46 is located around the spline joint S where the hole-side spline 13A of the output shaft 13 and the shaft-side spline 24A of the rotary shaft 24 are connected, and the through hole 45 is the spline joint S. It communicates with the space 46 existing above.
  • the inlet of the supply path 44 is located at the meshing portion of the third sun gear 38 and the third planetary gear 39, and the outlet of the supply path 44 is located above the spline joint S of the output shaft 13 and the rotating shaft 24. ing.
  • the third planetary gear 39 meshing with the third sun gear 38 rotates while meshing with the internal gear 11A, and these third sun gear 38 rotate.
  • the lubricating oil 43 adhering to the tooth surface of the meshing portion of the third planetary gear 39 is jetted in the axial direction.
  • the lubricating oil 43 enters the space 46 from the through hole 45 which is the inlet of the supply path 44 and is supplied to the spline joint S from the lower end of the space 46 which is the outlet of the supply path 44.
  • the third sun gear 38 and the third planetary gear system are connected to the spline joint S between the hole side spline portion 13A of the output shaft 13 and the shaft side spline portion 24A of the rotating shaft 24.
  • the lubricating oil 43 ejected from the meshing portion of the gear 39 is supplied, and the life reduction of the spline joint S can be suppressed.
  • the third carrier 40 which is a component of the final stage planetary gear mechanism 37, is fixedly supported by the fixed side housing 15. (3) Since the through hole 45 facing the meshing portion between the third sun gear 38 and the third planetary gear 39 is provided in the carrier 40, and the through hole 45 is communicated with the space 46 above the spline joint S. Even if the oil level of the lubricating oil 43 drops when the vehicle runs at high speed for a long time, the lubricating oil 43 ejected from the meshing portion of the third sun gear 38 and the third planetary gear 39 is supplied to the spline joint S. Can.
  • the lubricating oil 43 can be supplied to the spline joint S at high speed and for a long time without increasing the filling amount of the lubricating oil 43, resulting in problems such as a decrease in running efficiency and an increase in the cost of the lubricating oil 43. It is possible to suppress the decrease in the life of the spline joint S without causing it to
  • FIG. 6 is a cross-sectional view of a traveling device provided with a reduction gear according to the second embodiment, and the parts corresponding to FIGS. 2 and 3 are given the same reference numerals.
  • the depth dimension D (the length along the axial direction of the fixed side housing 15) of the space 46 communicating with the through hole 45 is compared with that in the first embodiment.
  • the lower end of the space 46 faces the position slightly offset from the tip of the output shaft 13 provided with the hole-side spline portion 13A to the other axial end side. That is, the lower end of the space portion 46 which is the outlet of the supply path 44 is positioned directly above the shaft-side spline portion 24A of the rotary shaft 24 exposed from the spline joint portion S.
  • the remaining configuration is basically the same as that of the first embodiment.
  • the lubricating oil 43 ejected from the meshing portion of the third sun gear 38 and the third planetary gear 39 passes from the through hole 45 through the space 46 Since the lubricant oil 43 is efficiently supplied to the shaft side spline portion 24A of the rotating shaft 24 at the pin point, the lubricating oil 43 is guided to the hole side spline portion 13A and the shaft side spline portion 24A connected by the spline joint portion S It is possible to suppress the decrease in the life of the part S.
  • FIG. 7 is a cross-sectional view of a traveling device provided with a reduction gear according to a third embodiment, and parts corresponding to FIGS. 2 and 3 are given the same reference numerals.
  • a tapered through hole 47 is bored in the third carrier 40, and the supply path 44 is configured by the through hole 47 and the space portion 46. ing.
  • the through hole 47 has a tapered through hole in which the opening diameter on the outlet side facing the space portion 46 is smaller than the opening diameter on the inlet side facing the meshing portion of the third sun gear 38 and the third planetary gear 39 It has become.
  • the remaining configuration is basically the same as that of the first embodiment.
  • the lubricating oil 43 ejected from the meshing portion of the third sun gear 38 and the third planetary gear 39 passes from the through hole 47 through the space portion 46 At this time, since the through hole 47 has a taper for narrowing the opening diameter on the outlet side, the lubricating oil 43 ejected from the engagement portion is converged by the through hole 47 with a taper. Thus, the space portion 46 can be efficiently sent. As a result, the lubricating oil 43 can be supplied to the spline joint S between the output shaft 13 and the rotary shaft 24 even when traveling at high speed for a long time, and the life reduction of the spline joint S can be suppressed.
  • FIG. 8 is a cross-sectional view of a traveling device provided with a reduction gear according to a fourth embodiment, and parts corresponding to FIGS. 2 and 3 are given the same reference numerals.
  • an inclined hole 48 is formed in the third carrier 40, and the supply path 44 is configured by the inclined hole 48.
  • the inclined hole 48 is provided in the inside of a bulging portion 40C projecting from the end face of the third carrier 40, and the bulging portion 40C enters the lower end side of the space portion 46.
  • One end side of the inclined hole 48 faces the meshing portion of the third sun gear 38 and the third planetary gear 39, the other end side of the inclined hole 48 faces the vicinity of the spline joint S, and the inclined hole 48 is one end It slopes in a downward slope from the opening on the (inlet) side to the opening on the other end (outlet) side.
  • the remaining configuration is basically the same as that of the first embodiment.
  • the lubricating oil 43 jetted from the meshing portion of the third sun gear 38 and the third planetary gear 39 passes obliquely downward inside the inclined hole 48. Since the torque is supplied to the spline joint S, it is possible to suppress the reduction in the life of the spline joint S even when traveling at high speed for a long time.
  • FIG. 9 is a cross-sectional view of a traveling device provided with a reduction gear according to the fifth embodiment
  • FIG. 10 is an explanatory view of a final stage carrier provided in the reduction gear as viewed from the hydraulic motor side.
  • the corresponding parts are given the same reference numerals.
  • the third carrier 40 is provided with a slit 49 instead of the through hole 45, and the slit 49 and the space portion 46 form a supply path 44. ing.
  • the upper end side of the slit 49 is at a position facing the meshing portion of the third sun gear 38 and the third planetary gear 39, and the lower end side of the slit 49 is provided at the central portion of the third carrier 40.
  • the outer peripheral edge of the shaft insertion hole 40D is reached.
  • the slits 49 can be easily formed in the third carrier 40 by cutting or the like, and by adjusting the slit width W of the slits 49, the flow rate of the lubricating oil 43 can be easily controlled.
  • the remaining configuration is basically the same as that of the first embodiment.
  • the lubricating oil 43 jetted from the meshing portion of the third sun gear 38 and the third planetary gear 39 passes through the space portion 46 from the slit 49 and is splined. Since it is supplied to the joint portion S, the life reduction of the spline joint portion S can be suppressed even when traveling at high speed for a long time.
  • FIG. 11 is a cross-sectional view of a traveling device provided with a reduction gear according to a sixth embodiment, and the parts corresponding to FIGS.
  • the bearing using the screw member 51 The nut 25 is fixed to the inner ring of the main bearing 50.
  • the screw member 51 is not connected to the third carrier 40, and the third carrier 40 is attached to the fixed housing 15 in a non-rotational state by spline coupling the hole side spline portion 40B to the shaft side spline portion 15E. ing.
  • the remaining configuration is basically the same as that of the first embodiment.
  • the bearing nut 25 is prevented from rotating using the screw member 51 separate from the third carrier 40, the mounting position of the screw member 51 is Regardless, the through hole 45 serving as the inlet of the supply path can be easily set at the optimum position above the oil level of the lubricating oil 43.

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  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Retarders (AREA)
  • General Details Of Gearings (AREA)

Abstract

L'invention concerne un dispositif de décélération dans lequel de l'huile de lubrification peut être fournie de manière stable à un couplage par cannelure d'une source de rotation et d'un arbre rotatif, même lorsqu'un boîtier côté rotation tourne à grande vitesse pendant une longue période. Le dispositif de décélération (14) comprend une pluralité de mécanismes d'engrenage planétaire (23, 31, 37) qui ralentissent la rotation d'un moteur hydraulique (12) et transmettent la rotation à un boîtier côté rotation (17). Un arbre de sortie (13) du moteur hydraulique (12) et un arbre rotatif (24) sont couplés par un accouplement à cannelure (S), et le boîtier côté rotation (17) est rempli d'huile de lubrification (43). Un troisième support (40) du mécanisme d'engrenage planétaire final (37) est supporté de manière fixe sur un boîtier côté fixe (15), et une voie d'alimentation (44) est conçue à partir d'un trou traversant (45) formé à travers le troisième support (40) et un espace (46) situé au-dessus du couplage à cannelure (S), de telle sorte que, même pendant un déplacement à grande vitesse pendant une longue période, de l'huile de lubrification (43) éjectée à partir d'une partie où un troisième planétaire (38) et un troisième engrenage planétaire (39) s'engrènent est amenée au couplage à cannelure (S) par l'intermédiaire du trou traversant (45) et de l'espace (46).
PCT/JP2018/026956 2017-09-04 2018-07-18 Dispositif de décélération WO2019044233A1 (fr)

Priority Applications (3)

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KR1020197035868A KR102234967B1 (ko) 2017-09-04 2018-07-18 감속 장치
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CN111033081A (zh) 2020-04-17

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