WO2016016990A1 - Axle device and work vehicle - Google Patents

Axle device and work vehicle Download PDF

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Publication number
WO2016016990A1
WO2016016990A1 PCT/JP2014/070183 JP2014070183W WO2016016990A1 WO 2016016990 A1 WO2016016990 A1 WO 2016016990A1 JP 2014070183 W JP2014070183 W JP 2014070183W WO 2016016990 A1 WO2016016990 A1 WO 2016016990A1
Authority
WO
WIPO (PCT)
Prior art keywords
axial direction
spline
housing
axle
bearing member
Prior art date
Application number
PCT/JP2014/070183
Other languages
French (fr)
Japanese (ja)
Inventor
欣哉 森
Original Assignee
株式会社小松製作所
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 株式会社小松製作所 filed Critical 株式会社小松製作所
Priority to PCT/JP2014/070183 priority Critical patent/WO2016016990A1/en
Publication of WO2016016990A1 publication Critical patent/WO2016016990A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B35/00—Axle units; Parts thereof ; Arrangements for lubrication of axles
    • B60B35/12—Torque-transmitting axles
    • B60B35/18—Arrangement of bearings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K17/00—Arrangement or mounting of transmissions in vehicles
    • B60K17/04—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K17/00—Arrangement or mounting of transmissions in vehicles
    • B60K17/30—Arrangement or mounting of transmissions in vehicles the ultimate propulsive elements, e.g. ground wheels, being steerable
    • 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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D1/00—Couplings for rigidly connecting two coaxial shafts or other movable machine elements
    • F16D1/06—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end
    • 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
    • F16H1/32—Toothed 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

Definitions

  • the present invention relates to an axle device and a work vehicle.
  • axle devices such as wheel loaders and backhoe loaders are equipped with axle devices.
  • the axle device is configured to transmit driving force from the engine to the wheels.
  • the axle device includes a housing, a first axle shaft, a planetary gear mechanism, and a second axle shaft.
  • the housing is fixed to the body frame.
  • the planetary gear mechanism decelerates the rotation of the first axle shaft and transmits it to the second axle shaft.
  • the second axle shaft supports the wheels.
  • a restriction disc is attached to the inner end of the second axle shaft in the axial direction. The restriction disc restricts the movement of the second axle shaft outward in the axial direction.
  • the size of the restriction disk is increased to improve the strength of the restriction disk.
  • increasing the size of the regulation disk or the like causes a problem of increasing the size of the axle device.
  • An object of the present invention is to improve the wheel holding force without increasing the size of the axle device.
  • the axle device includes a housing, a first axle shaft, a planetary gear mechanism, a second axle shaft, a bearing member, and a regulating member.
  • the first axle shaft extends in the axial direction.
  • the planetary gear mechanism includes a sun gear, a planetary gear, a carrier, and a ring gear.
  • the sun gear rotates integrally with the first axle shaft.
  • Planetary gear meshes with sun gear.
  • the carrier has a through hole including a first spline portion.
  • the carrier rotatably supports the planetary gear.
  • the ring gear is fixed to the housing and meshes with the planetary gear.
  • the planetary gear mechanism is accommodated in the housing.
  • the second Askle shaft has a shaft main body portion, a tip portion, and a groove portion.
  • the shaft main body has a second spline portion that engages with the first spline portion.
  • the shaft main body extends in the axial direction within the housing.
  • the tip portion protrudes axially outward from the housing.
  • the groove portion extends in the circumferential direction at the second spline portion.
  • the bearing member is supported by the housing.
  • the bearing member rotatably supports the second axle shaft.
  • the restricting member is disposed in the groove portion.
  • the restricting member protrudes radially outward from the groove.
  • the second spline part has an engaging part that engages with the first spline part.
  • the restricting member is disposed outside the engaging portion in the axial direction.
  • the restricting member is disposed on the inner side in the axial direction than the bearing member.
  • the restricting member protrudes radially outward from the groove. For this reason, even if the second axle shaft moves to the outside in the axial direction, the regulating member comes into contact with the bearing member, and the movement of the second axle shaft to the outside in the axial direction is regulated. Therefore, the holding force of the wheel can be improved without increasing the size of the axle device.
  • the second spline portion has a spline end portion.
  • the spline end portion is disposed at an outer end portion in the axial direction of the second spline portion.
  • the diameter of the valley bottom increases toward the outside in the axial direction.
  • the groove is formed at the end of the spline. According to this structure, even if a groove part is formed, it can suppress that the intensity
  • the inner wall surface of the groove portion is constituted by a smooth surface. According to this configuration, it is possible to prevent stress concentration from occurring on the inner wall surface of the groove.
  • the groove has a semicircular cross-sectional shape.
  • the restricting member has an annular shape.
  • the regulating member has a circular cross section.
  • the housing has a protruding portion protruding radially inward from the inner peripheral surface.
  • the bearing member comes into contact with the protrusion from the inside in the axial direction. According to this configuration, the bearing member is restricted from moving outward in the axial direction by contacting the protruding portion.
  • the axially inner end of the bearing member is chamfered. According to this configuration, when the bearing member and the regulating member come into contact with each other, the bearing member can press the regulating member radially inward by the chamfered inner peripheral side end. As a result, it is possible to prevent the restricting member from coming off the groove.
  • the inner peripheral end portion on the inner side in the axial direction of the bearing member is R-chamfered.
  • the second spline portion has a plurality of valleys and a plurality of peaks.
  • a groove part is formed in each peak part.
  • the axle device may further include at least one spacer between the bearing member and the regulating member.
  • a work vehicle includes any one of the axle devices described above, a body frame, and wheels.
  • An axle device is attached to the body frame.
  • the wheel is attached to the tip of the second axle shaft.
  • the holding power of the wheel can be improved without increasing the size of the axle device.
  • FIG. 7 is a sectional view taken along line VII-VII in FIG. 6.
  • the enlarged view of an axle apparatus which concerns on the modification 1.
  • FIG. 1 is a side view of work vehicle 100.
  • “right”, “left”, “upper”, and “lower” indicate directions based on a state of looking forward from the cab.
  • “Vehicle width direction” is synonymous with “left-right direction”.
  • the “front-rear direction” means the front-rear direction of the vehicle body.
  • the work vehicle 100 includes a body frame 101, a work implement 102, a plurality of wheels 103, and a cab 104.
  • the cab 104 is placed on the vehicle body frame 101.
  • the work machine 102 is attached to the front portion of the vehicle body frame 101.
  • the work machine 102 includes a boom 102a, a bucket 102b, a boom cylinder 102c, and a bucket cylinder 102d.
  • the boom 102a is a member for lifting the bucket 102b.
  • the boom 102a is attached to the vehicle body frame 101 so as to be rotatable in the vertical direction.
  • the bucket 102b is attached to the tip of the boom 102a so as to be rotatable in the vertical direction.
  • the boom 102a is rotated up and down by a boom cylinder 102c.
  • Bucket 102b is rotated up and down by bucket cylinder 102d. Note that other work tools such as forks can be attached to the boom 102a instead of the bucket 102b.
  • the work vehicle 100 includes an engine 105 and a hydraulic pump 106.
  • the engine 105 is, for example, a diesel engine, and the driving force generated by the engine 105 is transmitted to the hydraulic pump 106.
  • the driving force generated by the engine 105 is transmitted to the wheel 103 via the axle device 10 described later.
  • the hydraulic pump 106 discharges hydraulic oil when driven by the engine 105.
  • the cylinders 102c and 102d described above are driven by hydraulic oil discharged from the hydraulic pump 106.
  • FIG. 2 is a cross-sectional view of the axle device 10 taken along the line II-II in FIG. As shown in FIG. 2, the axle device 10 is used in a work vehicle having a body frame 101.
  • the axle device 10 includes a first axle shaft 1, a second axle shaft 2, a housing 3, a planetary gear mechanism 4, a first bearing member 5, and a regulating member 6.
  • the axle device 10 further includes a brake mechanism 7 and a second bearing member 8.
  • the housing 3 is configured to be fixed to the vehicle body frame 101. Specifically, the housing 3 has a mounting portion 30. The housing 3 is attached to the vehicle body frame 101 with bolts or the like via the attachment portion 30.
  • the housing 3 houses the first axle shaft 1, the second axle shaft 2, and the planetary gear mechanism 4.
  • the housing 3 extends in the axial direction.
  • the housing 3 opens to the outside in the axial direction.
  • the axial direction is a direction in which the central axis of the first axle shaft 1 extends. In a state where the axle device 10 is attached to the vehicle body frame 101, the axial direction extends parallel to the vehicle width direction.
  • the outside in the axial direction means the side far from the center of the vehicle body in the axial direction.
  • the inner side in the axial direction means the side close to the center of the vehicle body in the axial direction.
  • the housing 3 is divided into a plurality of parts. Specifically, the housing 3 includes a housing main body portion 31 and a housing end portion 32.
  • the housing body 31 houses the first axle shaft 1 and the brake mechanism 7.
  • the housing end 32 is detachably attached to the housing main body 31.
  • the housing end 32 is attached to the housing main body 31 using a bolt.
  • the housing end portion 32 accommodates the second axle shaft 2 and the planetary gear mechanism 4.
  • the housing 3 supports the first bearing member 5. Specifically, the movement of the first bearing member 5 in the radial direction is restricted by the inner peripheral surface of the housing 3.
  • the housing 3 has a protruding portion 33.
  • the protruding portion 33 protrudes radially inward from the inner peripheral surface of the housing 3.
  • the protrusion 33 is an annular shape extending in the circumferential direction.
  • the first bearing member 5 comes into contact with the protruding portion 33 from the inner side in the axial direction.
  • the first bearing member 5 is restricted from moving outward in the axial direction by coming into contact with the protruding portion 33.
  • the radial direction means the radial direction of a circle centered on the central axis of the first axle shaft 1.
  • the first axle shaft 1 extends in the axial direction.
  • the first axle shaft 1 is rotationally driven by a driving force from the engine 105.
  • the first axle shaft 1 is transmitted with a driving force from the engine 105 via a differential mechanism (not shown).
  • the first axle shaft 1 rotates around an axis extending in the axial direction.
  • An escape portion 12 is formed at the axially outer end of the first axle shaft 1 (see FIG. 3).
  • FIG. 3 is an enlarged view of the axle device 10.
  • the planetary gear mechanism 4 includes a sun gear 41, a plurality of planetary gears 42, a carrier 43, and a ring gear 44.
  • the planetary gear mechanism 4 is configured to reduce the rotation of the first axle shaft 1 and transmit it to the second axle shaft 2.
  • the sun gear 41 rotates integrally with the first axle shaft 1. Specifically, the sun gear 41 is formed on the outer peripheral surface of the first axle shaft 1. The sun gear 41 is formed at the axially outer end of the first axle shaft 1. The sun gear 41 is a separate member from the first axle shaft 1 and may be fixed to the first axle shaft 1.
  • Each planetary gear 42 meshes with the sun gear 41.
  • Each planetary gear 42 is disposed around the sun gear 41.
  • Each planetary gear 42 is arranged at intervals in the circumferential direction.
  • the circumferential direction refers to the circumferential direction of a circle centered on the central axis of the first axle shaft 1.
  • Each planetary gear 42 is arranged to be able to rotate.
  • Each planetary gear 42 is arranged so as to be capable of revolving around the sun gear 41.
  • the carrier 43 supports each planetary gear 42 rotatably.
  • the carrier 43 rotates with the revolution of each planetary gear 42. That is, the carrier 43 can rotate around the central axis of the first axle shaft 1.
  • Each planetary gear 42 can rotate while being supported by the carrier 43, and can revolve around the sun gear 41.
  • the carrier 43 is in contact with the first bearing member 5 in the axial direction. Specifically, the end portion 431 on the outer side in the axial direction of the carrier 43 is in contact with the first bearing member 5. This restricts the carrier 43 from moving outward in the axial direction. The carrier 43 is in contact with the inner ring of the first bearing member 5.
  • FIG. 4 is an enlarged view showing a part of the axle device 10.
  • the carrier 43 has a through hole 432.
  • the second axle shaft 2 extends through the through hole 432.
  • the through hole 432 has a first spline part 433.
  • a first spline portion 433 is formed on the inner wall surface of the through hole 432.
  • a shoulder portion 434 is formed at the inner end portion in the axial direction of the through hole 432.
  • the axially inner end portion of the through hole 432 has a larger radius than other portions of the through hole 432.
  • the ring gear 44 meshes with each planetary gear 42.
  • the ring gear 44 is fixed to the housing 3.
  • the ring gear 44 is fixed to the housing end 32.
  • the ring gear 44 may be formed directly on the inner peripheral surface of the housing 3.
  • the second axle shaft 2 extends in the axial direction. Specifically, the central axis of the second axle shaft 2 and the central axis of the first axle shaft 1 are arranged on substantially the same straight line.
  • the second axle shaft 2 has a shaft main body portion 21 and a tip portion 22.
  • the shaft main body portion 21 and the tip end portion 22 are formed of a single member.
  • the shaft main body 21 extends in the axial direction in the housing 3.
  • the shaft main body 21 is rotatably supported by the housing 3. Specifically, the shaft body 21 is supported by the housing 3 via the first bearing member 5 and the second bearing member 8.
  • the shaft main body 21 has a second spline portion 24.
  • the second spline part 24 is engaged with the first spline part 433 of the carrier 43.
  • a part of the second spline part 24 is not engaged with the first spline part 433.
  • a portion of the second spline portion 24 that engages with the first spline portion 433 is referred to as an engagement portion 24a.
  • the second spline portion 24 has a spline end portion 24b.
  • the spline end portion 24 b is disposed at the axially outer end portion of the second spline portion 24.
  • the spline end portion 24 b is not engaged with the first spline portion 433.
  • the radius of the valley bottom increases toward the outside in the axial direction.
  • the second spline part 24 has a plurality of valleys and a plurality of peaks.
  • the valleys and the peaks are alternately arranged in the circumferential direction.
  • Each trough and each peak extend in the axial direction.
  • the radius of the valley bottom of each valley portion gradually increases toward the outside in the axial direction.
  • the outer diameter of each peak part in the spline end part 24b is larger than the outer diameter of each peak part in the 2nd spline part 24 other than the spline end part 24b.
  • the second spline portion 24 is formed by forming a plurality of valleys with a disc-shaped cutter 240.
  • the cutter 240 forms a trough in the shaft body 21 while moving from the axially inner side toward the axially outer side.
  • each valley at the axially outer end of the second spline part 24 has a shape along the outer peripheral edge of the cutter 240. That is, the radius of the valley bottom of each valley portion at the axially outer end portion of the second spline portion 24 gradually increases toward the outside in the axial direction. This axially outer end is the spline end 24b.
  • FIG. 5 is an enlarged view showing a part of the second axle shaft 2.
  • the second axle shaft 2 further has a groove 25.
  • the groove part 25 is formed in the second spline part 24.
  • the groove part 25 is arrange
  • the groove portion 25 is formed in the spline end portion 24b.
  • the groove portion 25 is formed in each peak portion of the second spline portion 24.
  • the groove portion 25 extends in the circumferential direction of the shaft main body portion 21.
  • the groove part 25 is a circumferential groove part.
  • the inner wall surface of the groove part 25 is comprised from a smooth surface. That is, the corner of the inner wall surface of the groove 25 is formed in an arc shape.
  • the groove part 25 has a semicircular cross-sectional shape.
  • the cross section of the groove part 25 shows the cross section which cut
  • the semicircular shape does not mean only a complete semicircular shape, but a concept including a substantial semicircular shape.
  • the tip 22 protrudes from the housing 3.
  • the front end portion 22 is configured so that the rear wheel 103 is attached.
  • the rear wheel 103 is attached to the distal end portion 22 using a bolt or the like.
  • the outer shape of the tip 22 is circular.
  • the tip portion 22 has a disk shape.
  • the tip 22 has a larger diameter than the shaft body 21.
  • the second axle shaft 2 is restricted from moving outward in the axial direction.
  • a regulation disk 9 is attached to the second axle shaft 2.
  • the regulation disc 9 is attached to the second axle shaft 2 by a bolt 90.
  • the restriction disc 9 is configured to restrict the movement of the second axle shaft 2 outward in the axial direction.
  • the regulation disc 9 has a protruding portion 91.
  • the protruding portion 91 protrudes in the radial direction from the axially inner end portion 23 of the second axle shaft 2.
  • the restriction disk 9 is disk-shaped, and the outer diameter of the restriction disk 9 is larger than the outer diameter of the axially inner end 23 of the second axle shaft 2.
  • the protruding portion 91 of the restriction disc 9 abuts on the shoulder portion 434 of the carrier 43 in the axial direction.
  • the regulating member 6 is disposed in the groove portion 25 of the second axle shaft 2. That is, the restricting member 6 is disposed on the outer side in the axial direction than the engaging portion 24a, and is disposed on the inner side in the axial direction with respect to the first bearing member 5.
  • the restricting member 6 protrudes radially outward from the groove 25 in a state where it is disposed in the groove 25.
  • the inner peripheral side portion of the restricting member 6 is fitted into the groove portion 25, and the outer peripheral side portion of the restricting member 6 protrudes from the groove portion 25.
  • the regulating member 6 has an outer diameter D that is larger than the inner diameter of the first bearing member 5 (see FIG. 6).
  • the carrier 43 has an escape portion 435 in order to avoid interference with the regulating member 6.
  • FIG. 6 is a view of the regulating member 6 viewed along the axial direction. As shown in FIG. 6, the regulating member 6 is formed in a C shape.
  • the regulating member 6 is made of, for example, a piano wire, a hard net wire, a spring steel wire, or the like.
  • the outer diameter D of the regulating member 6 is larger than the inner diameter of the first bearing member 5.
  • the restricting member 6 is, for example, a retaining ring.
  • FIG. 7 is a cross-sectional view taken along line VII-VII in FIG.
  • the cross-sectional shape of the regulating member 6 is a circular shape having a diameter d. That is, the regulating member 6 is formed by curving a rod-like member having a circular cross section.
  • the radius of the arc of the groove 25 is equal to or less than the radius d / 2 of the cross section of the restricting member 6.
  • the first bearing member 5 is supported by the housing 3. Moreover, the 1st bearing member 5 is supporting the 2nd axle shaft 2 rotatably. Specifically, the first bearing member 5 is disposed between the housing 3 and the second axle shaft 2 in the radial direction. The first bearing member 5 is attached to the outer peripheral surface of the shaft main body 21 of the second axle shaft 2. The first bearing member 5 is located on the outer side in the axial direction than the second spline portion 24.
  • the first bearing member 5 is supported by the housing 3 so as to be restricted from moving outward in the axial direction. Specifically, as described above, when the first bearing member 5 abuts on the protruding portion 33 of the housing 3, the first bearing member 5 is restricted from moving outward in the axial direction.
  • the first bearing member 5 corresponds to the bearing member of the present invention.
  • the inner peripheral end 51 on the inner side in the axial direction of the first bearing member 5 is chamfered.
  • the inner peripheral end 51 of the first bearing member 5 is R-chamfered.
  • the inner peripheral end 51 is R-chamfered, it faces inward in the radial direction.
  • the inner peripheral end of the first bearing member 5 The part 51 presses the regulating member 6 toward the radially inner side. Therefore, it is possible to reliably prevent the restricting member 6 from being detached from the groove portion 25.
  • the inner peripheral end portion 51 of which the first bearing member 5 is chamfered is configured to come into contact with the regulating member 6.
  • the second bearing member 8 is supported by the housing 3. Moreover, the 2nd bearing member 8 is supporting the 2nd axle shaft 2 rotatably. Specifically, the second bearing member 8 is disposed between the housing 3 and the second axle shaft 2 in the radial direction. The second bearing member 8 is attached to the outer peripheral surface of the shaft main body 21 of the second axle shaft 2. The second bearing member 8 is located on the outer side in the axial direction than the first bearing member 5.
  • the brake mechanism 7 is configured to brake the rotation of the rear wheel 103.
  • the brake mechanism 7 is a multi-plate brake mechanism. Specifically, the brake mechanism 7 includes a plurality of rotating disks 71, a plurality of fixed disks 72, and a piston 73.
  • Each rotating disk 71 rotates integrally with the first axle shaft 1. Specifically, each rotating disk 71 has a through hole in the center. The first axle shaft 1 passes through the through hole of each rotary disk 71. Each rotating disk 71 is spline-engaged with the first axle shaft 1. Each rotary disk 71 is slidable in the axial direction.
  • Each fixed disk 72 is spline-engaged with the housing 3. That is, each fixed disk 72 does not rotate. Each fixed disk 72 is slidable in the axial direction.
  • the restricting member 6 protrudes radially outward from the groove portion 25.
  • the outer diameter D of the restricting member 6 is larger than the inner diameter of the first bearing member 5.
  • a spacer 11 may be disposed between the first bearing member 5 and the regulating member 6.
  • the protrusion part 33 was cyclic
  • the housing 3 has a plurality of protrusions 33, and the protrusions 33 may be arranged along the circumferential direction at intervals.
  • Modification 4 in the said embodiment, although the wheel loader was illustrated as a working vehicle, the working vehicle to which this invention is applied is not limited to a wheel loader.
  • the axle device according to the present invention can be applied to other work vehicles such as a backhoe loader.
  • the groove part 25 is continuously extended in the circumferential direction
  • the shape of the groove part 25 is not specifically limited to this.
  • the groove part 25 may extend intermittently in the circumferential direction.
  • the wheel loader 100 has a plurality of regulating members 9. Each regulating member 9 is arranged in each groove 25.
  • control member 9 is annular
  • shape of the control member 9 is not specifically limited to this.
  • restriction member 9 may be a rectangular ring.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Retarders (AREA)

Abstract

An axle device (10) is provided with a housing (3), a first axle shaft (1), a planetary gear mechanism (4), a second axle shaft (2), a first bearing member (5), and a regulating member (6). A carrier (43) of the planetary gear mechanism (4) has a through-hole (432) including a first spline section (433). A shaft body section (21) of the second axle shaft (2) has a second spline section (24) engaged with the first spline section (433). A recess (25) is formed in the second spline section (24). The first bearing member (5) is supported by the housing (3). The first bearing member (5) rotatably supports the second axle shaft (2). The regulating member (6) is disposed in the recess (25). The regulating member (6) protrudes radially outward from the recess (25).

Description

アクスル装置、及び作業車両Axle device and work vehicle
　本発明は、アクスル装置、及び作業車両に関するものである。 The present invention relates to an axle device and a work vehicle.
　ホイールローダ及びバックホーローダなどの作業車両は、アクスル装置を備えている。アクスル装置は、エンジンからの駆動力を車輪に伝達するように構成されている。例えば、特許文献１に開示されているように、アクスル装置は、ハウジングと、第１アクスルシャフトと、遊星歯車機構と、第２アクスルシャフトとを備えている。 Work vehicles such as wheel loaders and backhoe loaders are equipped with axle devices. The axle device is configured to transmit driving force from the engine to the wheels. For example, as disclosed in Patent Document 1, the axle device includes a housing, a first axle shaft, a planetary gear mechanism, and a second axle shaft.
　ハウジングは、車体フレームに固定されている。遊星歯車機構は、第１アクスルシャフトの回転を減速して第２アクスルシャフトに伝達する。第２アクスルシャフトは、車輪を支持している。第２アクスルシャフトの軸方向の内側端部に、規制円板が取り付けられている。この規制円板によって、第２アクスルシャフトの軸方向外側への移動が規制される。以上の構成によって、アクスル装置が車輪を保持している。 The housing is fixed to the body frame. The planetary gear mechanism decelerates the rotation of the first axle shaft and transmits it to the second axle shaft. The second axle shaft supports the wheels. A restriction disc is attached to the inner end of the second axle shaft in the axial direction. The restriction disc restricts the movement of the second axle shaft outward in the axial direction. With the above configuration, the axle device holds the wheels.
国際公開第２０１４／００３１２５号International Publication No. 2014/003125
　上述したようなアクスル装置では、車輪の保持力を向上させるために、規制円板を大型化させたりして規制円板の強度を向上させていた。しかしながら、規制円板などを大型化することは、アクスル装置が大型化するという問題が生じる。 In the axle device as described above, in order to improve the holding force of the wheel, the size of the restriction disk is increased to improve the strength of the restriction disk. However, increasing the size of the regulation disk or the like causes a problem of increasing the size of the axle device.
　本発明の課題は、アクスル装置を大型化することなく車輪の保持力を向上させることにある。 An object of the present invention is to improve the wheel holding force without increasing the size of the axle device.
　本発明の第１側面に係るアクスル装置は、ハウジングと、第１アクスルシャフトと、遊星歯車機構と、第２アクスルシャフトと、軸受部材と、規制部材とを備えている。第１アクスルシャフトは、軸方向に延びている。遊星歯車機構は、サンギアと、プラネタリギアと、キャリアと、リングギアとを有する。サンギアは、第１アクスルシャフトと一体的に回転する。プラネタリギアは、サンギアと噛み合う。キャリアは、第１スプライン部を含む貫通孔を有する。キャリアは、プラネタリギアを回転可能に支持する。リングギアは、ハウジングに固定され、プラネタリギアと噛み合う。遊星歯車機構は、ハウジングに収容される。第２アスクルシャフトは、シャフト本体部、先端部、及び溝部を有する。シャフト本体部は、第１スプライン部と係合する第２スプライン部を有する。シャフト本体部は、ハウジング内において軸方向に延びる。先端部は、ハウジングから軸方向外側に突出する。溝部は、第２スプライン部において周方向に延びる。軸受部材は、ハウジングに支持される。軸受部材は、第２アクスルシャフトを回転可能に支持する。規制部材は、溝部に配置される。規制部材は、溝部から径方向外側に突出する。第２スプライン部は、第１スプライン部と係合する係合部を有する。規制部材は、係合部よりも軸方向の外側に配置される。規制部材は、軸受部材よりも軸方向の内側に配置される。 The axle device according to the first aspect of the present invention includes a housing, a first axle shaft, a planetary gear mechanism, a second axle shaft, a bearing member, and a regulating member. The first axle shaft extends in the axial direction. The planetary gear mechanism includes a sun gear, a planetary gear, a carrier, and a ring gear. The sun gear rotates integrally with the first axle shaft. Planetary gear meshes with sun gear. The carrier has a through hole including a first spline portion. The carrier rotatably supports the planetary gear. The ring gear is fixed to the housing and meshes with the planetary gear. The planetary gear mechanism is accommodated in the housing. The second Askle shaft has a shaft main body portion, a tip portion, and a groove portion. The shaft main body has a second spline portion that engages with the first spline portion. The shaft main body extends in the axial direction within the housing. The tip portion protrudes axially outward from the housing. The groove portion extends in the circumferential direction at the second spline portion. The bearing member is supported by the housing. The bearing member rotatably supports the second axle shaft. The restricting member is disposed in the groove portion. The restricting member protrudes radially outward from the groove. The second spline part has an engaging part that engages with the first spline part. The restricting member is disposed outside the engaging portion in the axial direction. The restricting member is disposed on the inner side in the axial direction than the bearing member.
　本発明に係るアクスル装置において、規制部材が溝部から径方向外側に突出している。このため、第２アクスルシャフトが軸方向の外側に移動しても、規制部材が軸受部材と当接して、第２アクスルシャフトの軸方向の外側への移動が規制される。よって、アクスル装置を大型化することなく、ホイールの保持力を向上させることができる。 In the axle device according to the present invention, the restricting member protrudes radially outward from the groove. For this reason, even if the second axle shaft moves to the outside in the axial direction, the regulating member comes into contact with the bearing member, and the movement of the second axle shaft to the outside in the axial direction is regulated. Therefore, the holding force of the wheel can be improved without increasing the size of the axle device.
　好ましくは、第２スプライン部は、スプライン端部を有する。スプライン端部は、第２スプライン部の軸方向の外側端部に配置される。スプライン端部は、軸方向の外側に向かって谷底の径が大きくなる。溝部は、スプライン端部に形成される。この構成によれば、溝部を形成しても、第２スプライン部の強度が低下することを抑制できる。 Preferably, the second spline portion has a spline end portion. The spline end portion is disposed at an outer end portion in the axial direction of the second spline portion. At the spline end, the diameter of the valley bottom increases toward the outside in the axial direction. The groove is formed at the end of the spline. According to this structure, even if a groove part is formed, it can suppress that the intensity | strength of a 2nd spline part falls.
　好ましくは、溝部の内壁面は、滑らかな面から構成される。この構成によれば、溝部の内壁面に応力集中が生じることを防ぐことができる。 Preferably, the inner wall surface of the groove portion is constituted by a smooth surface. According to this configuration, it is possible to prevent stress concentration from occurring on the inner wall surface of the groove.
　好ましくは、溝部は、半円形状の断面形状を有する。 Preferably, the groove has a semicircular cross-sectional shape.
　好ましくは、規制部材は、円環状である。また、好ましくは、規制部材は、円形状の断面を有する。 Preferably, the restricting member has an annular shape. Preferably, the regulating member has a circular cross section.
　好ましくは、ハウジングは、内周面から径方向内側に突出する突出部を有する。軸受部材は、軸方向内側から前記突出部と当接する。この構成によれば、軸受部材は、突出部と当接することによって、軸方向外側への移動が規制される。 Preferably, the housing has a protruding portion protruding radially inward from the inner peripheral surface. The bearing member comes into contact with the protrusion from the inside in the axial direction. According to this configuration, the bearing member is restricted from moving outward in the axial direction by contacting the protruding portion.
　好ましくは、軸受部材の軸方向内側の内周側端部は、面取り加工されている。この構成によれば、軸受部材と規制部材とが当接した場合、軸受部材は、面取り加工された内周側端部によって、規制部材を径方向の内側に押圧することができる。この結果、規制部材が溝部から外れることを防止することができる。 Preferably, the axially inner end of the bearing member is chamfered. According to this configuration, when the bearing member and the regulating member come into contact with each other, the bearing member can press the regulating member radially inward by the chamfered inner peripheral side end. As a result, it is possible to prevent the restricting member from coming off the groove.
　好ましくは、軸受部材の軸方向内側の内周端部は、Ｒ面取り加工されている。 Preferably, the inner peripheral end portion on the inner side in the axial direction of the bearing member is R-chamfered.
　好ましくは、第２スプライン部は、複数の谷部と複数の山部とを有する。溝部は、各山部に形成される。 Preferably, the second spline portion has a plurality of valleys and a plurality of peaks. A groove part is formed in each peak part.
　アクスル装置は、軸受部材と規制部材との間に少なくとも１つのスペーサをさらに備えていてもよい。 The axle device may further include at least one spacer between the bearing member and the regulating member.
　本発明の第２側面に係る作業車両は、上記いずれかのアクスル装置と、車体フレームと、車輪とを備えている。車体フレームに、アクスル装置が取り付けられる。車輪は、第２アクスルシャフトの先端部に取り付けられる。 A work vehicle according to a second aspect of the present invention includes any one of the axle devices described above, a body frame, and wheels. An axle device is attached to the body frame. The wheel is attached to the tip of the second axle shaft.
　本発明によれば、アクスル装置を大型化することなくホイールの保持力を向上させることができる。 According to the present invention, the holding power of the wheel can be improved without increasing the size of the axle device.
作業車両の側面図。The side view of a work vehicle. 図１のＩＩ－ＩＩ線断面図。II-II sectional view taken on the line of FIG. アクスル装置の拡大図。The enlarged view of an axle apparatus. アクスル装置の拡大図。The enlarged view of an axle apparatus. アクスル装置の拡大図。The enlarged view of an axle apparatus. 規制部材の側面図。The side view of a control member. 図６のＶＩＩ－ＶＩＩ線断面図。FIG. 7 is a sectional view taken along line VII-VII in FIG. 6. アクスル装置の拡大図。The enlarged view of an axle apparatus. 変形例１に係るアクスル装置の拡大図。The enlarged view of the axle apparatus which concerns on the modification 1. FIG. スプライン端部を説明するための断面図。Sectional drawing for demonstrating a spline edge part.
　以下、本発明の実施形態に係る作業車両について、図面を用いて説明する。本実施形態において、作業車両１００はホイールローダである。図１は、作業車両１００の側面図である。以下の説明において、「右」、「左」、「上」、及び「下」は、運転室から前方を見た状態を基準とした方向を示す。「車幅方向」は「左右方向」と同義である。また、「前後方向」は、車体の前後方向を意味する。 Hereinafter, a work vehicle according to an embodiment of the present invention will be described with reference to the drawings. In the present embodiment, the work vehicle 100 is a wheel loader. FIG. 1 is a side view of work vehicle 100. In the following description, “right”, “left”, “upper”, and “lower” indicate directions based on a state of looking forward from the cab. “Vehicle width direction” is synonymous with “left-right direction”. The “front-rear direction” means the front-rear direction of the vehicle body.
　図１に示すように、作業車両１００は、車体フレーム１０１と、作業機１０２と、複数の車輪１０３と、キャブ１０４と、を備えている。キャブ１０４は、車体フレーム１０１上に載置されている。作業機１０２は、車体フレーム１０１の前部に取り付けられている。 As shown in FIG. 1, the work vehicle 100 includes a body frame 101, a work implement 102, a plurality of wheels 103, and a cab 104. The cab 104 is placed on the vehicle body frame 101. The work machine 102 is attached to the front portion of the vehicle body frame 101.
　作業機１０２は、ブーム１０２ａとバケット１０２ｂとブームシリンダ１０２ｃ，バケットシリンダ１０２ｄとを有する。ブーム１０２ａは、バケット１０２ｂを持ち上げるための部材である。 The work machine 102 includes a boom 102a, a bucket 102b, a boom cylinder 102c, and a bucket cylinder 102d. The boom 102a is a member for lifting the bucket 102b.
　ブーム１０２ａは、上下方向に回動可能に車体フレーム１０１に取り付けられている。バケット１０２ｂは、上下方向に回動可能にブーム１０２ａの先端部に取り付けられている。ブーム１０２ａは、ブームシリンダ１０２ｃによって上下に回動する。バケット１０２ｂは、バケットシリンダ１０２ｄによって上下に回動する。なお、ブーム１０２ａには、バケット１０２ｂに代えてフォークなどの他の作業具が装着可能である。 The boom 102a is attached to the vehicle body frame 101 so as to be rotatable in the vertical direction. The bucket 102b is attached to the tip of the boom 102a so as to be rotatable in the vertical direction. The boom 102a is rotated up and down by a boom cylinder 102c. Bucket 102b is rotated up and down by bucket cylinder 102d. Note that other work tools such as forks can be attached to the boom 102a instead of the bucket 102b.
　作業車両１００は、エンジン１０５と油圧ポンプ１０６とを有する。エンジン１０５は、例えば、ディーゼル式のエンジンであり、エンジン１０５で発生した駆動力が、油圧ポンプ１０６に伝達される。エンジン１０５で発生した駆動力は、後述するアクスル装置１０を介して車輪１０３に伝達される。 The work vehicle 100 includes an engine 105 and a hydraulic pump 106. The engine 105 is, for example, a diesel engine, and the driving force generated by the engine 105 is transmitted to the hydraulic pump 106. The driving force generated by the engine 105 is transmitted to the wheel 103 via the axle device 10 described later.
　油圧ポンプ１０６は、エンジン１０５によって駆動されることにより作動油を吐出する。上述した各シリンダ１０２ｃ，１０２ｄは、油圧ポンプ１０６から吐出された作動油によって駆動される。 The hydraulic pump 106 discharges hydraulic oil when driven by the engine 105. The cylinders 102c and 102d described above are driven by hydraulic oil discharged from the hydraulic pump 106.
　図２は、アクスル装置１０における図１のＩＩ－ＩＩ断面図である。図２に示すように、アクスル装置１０は、車体フレーム１０１を有する作業車両に用いられる。アクスル装置１０は、第１アクスルシャフト１、第２アクスルシャフト２、ハウジング３、遊星歯車機構４、第１軸受部材５、及び規制部材６を備えている。また、アクスル装置１０は、ブレーキ機構７、及び第２軸受部材８をさらに備えている。 FIG. 2 is a cross-sectional view of the axle device 10 taken along the line II-II in FIG. As shown in FIG. 2, the axle device 10 is used in a work vehicle having a body frame 101. The axle device 10 includes a first axle shaft 1, a second axle shaft 2, a housing 3, a planetary gear mechanism 4, a first bearing member 5, and a regulating member 6. The axle device 10 further includes a brake mechanism 7 and a second bearing member 8.
　ハウジング３は、車体フレーム１０１に固定されるように構成されている。詳細には、ハウジング３は、取付部３０を有している。ハウジング３は、取付部３０を介して、ボルトなどによって車体フレーム１０１に取り付けられる。 The housing 3 is configured to be fixed to the vehicle body frame 101. Specifically, the housing 3 has a mounting portion 30. The housing 3 is attached to the vehicle body frame 101 with bolts or the like via the attachment portion 30.
　ハウジング３は、第１アクスルシャフト１、第２アクスルシャフト２、及び遊星歯車機構４を収容している。ハウジング３は、軸方向に延びている。ハウジング３は、軸方向外側に開口している。なお、軸方向とは、第１アクスルシャフト１の中心軸が延びる方向である。アクスル装置１０を車体フレーム１０１に取り付けた状態において、軸方向は、車幅方向と平行に延びている。また、軸方向の外側とは、軸方向において、車体の中央から遠い側を意味する。軸方向の内側とは、軸方向において、車体の中央に近い側を意味する。 The housing 3 houses the first axle shaft 1, the second axle shaft 2, and the planetary gear mechanism 4. The housing 3 extends in the axial direction. The housing 3 opens to the outside in the axial direction. The axial direction is a direction in which the central axis of the first axle shaft 1 extends. In a state where the axle device 10 is attached to the vehicle body frame 101, the axial direction extends parallel to the vehicle width direction. Further, the outside in the axial direction means the side far from the center of the vehicle body in the axial direction. The inner side in the axial direction means the side close to the center of the vehicle body in the axial direction.
　ハウジング３は、複数の部分に分割されている。詳細には、ハウジング３は、ハウジング本体部３１と、ハウジング端部３２とを有している。ハウジング本体部３１は、第１アクスルシャフト１及びブレーキ機構７などを収容している。 The housing 3 is divided into a plurality of parts. Specifically, the housing 3 includes a housing main body portion 31 and a housing end portion 32. The housing body 31 houses the first axle shaft 1 and the brake mechanism 7.
　ハウジング端部３２は、ハウジング本体部３１に取り外し可能に取り付けられている。例えば、ハウジング端部３２は、ボルトを用いてハウジング本体部３１に取り付けられている。ハウジング端部３２は、第２アクスルシャフト２及び遊星歯車機構４を収容する。 The housing end 32 is detachably attached to the housing main body 31. For example, the housing end 32 is attached to the housing main body 31 using a bolt. The housing end portion 32 accommodates the second axle shaft 2 and the planetary gear mechanism 4.
　ハウジング３は、第１軸受部材５を支持している。詳細には、ハウジング３の内周面によって、第１軸受部材５の径方向への移動を規制している。また、ハウジング３は、突出部３３を有している。突出部３３は、ハウジング３の内周面から径方向内側に突出している。例えば、突出部３３は、周方向に延びる環状である。第１軸受部材５は、軸方向内側から突出部３３と当接する。第１軸受部材５は、この突出部３３と当接することによって、軸方向外側への移動が規制される。なお、径方向とは、第１アクスルシャフト１の中心軸線を中心とした円の径方向を意味する。 The housing 3 supports the first bearing member 5. Specifically, the movement of the first bearing member 5 in the radial direction is restricted by the inner peripheral surface of the housing 3. The housing 3 has a protruding portion 33. The protruding portion 33 protrudes radially inward from the inner peripheral surface of the housing 3. For example, the protrusion 33 is an annular shape extending in the circumferential direction. The first bearing member 5 comes into contact with the protruding portion 33 from the inner side in the axial direction. The first bearing member 5 is restricted from moving outward in the axial direction by coming into contact with the protruding portion 33. The radial direction means the radial direction of a circle centered on the central axis of the first axle shaft 1.
　第１アクスルシャフト１は、軸方向に延びている。第１アクスルシャフト１は、エンジン１０５からの駆動力によって回転駆動される。第１アクスルシャフト１は、ディファレンシャル機構（図示省略）を介して、エンジン１０５からの駆動力が伝達される。第１アクスルシャフト１は、軸方向に延びる軸を中心に回転する。第１アクスルシャフト１の軸方向外側端部には、逃げ部１２が形成されている（図３参照）。後述するボルト９０の頭部が逃げ部１２内に収容されることによって、ボルト９０と第１アクスルシャフト１との干渉を回避することができる。 The first axle shaft 1 extends in the axial direction. The first axle shaft 1 is rotationally driven by a driving force from the engine 105. The first axle shaft 1 is transmitted with a driving force from the engine 105 via a differential mechanism (not shown). The first axle shaft 1 rotates around an axis extending in the axial direction. An escape portion 12 is formed at the axially outer end of the first axle shaft 1 (see FIG. 3). By accommodating a head of a bolt 90 described later in the escape portion 12, it is possible to avoid interference between the bolt 90 and the first axle shaft 1.
　図３は、アクスル装置１０の拡大図である。図３に示すように、遊星歯車機構４は、サンギア４１、複数のプラネタリギア４２、キャリア４３、及びリングギア４４を有する。遊星歯車機構４は、第１アクスルシャフト１の回転を減速して第２アクスルシャフト２に伝えるように構成されている。 FIG. 3 is an enlarged view of the axle device 10. As shown in FIG. 3, the planetary gear mechanism 4 includes a sun gear 41, a plurality of planetary gears 42, a carrier 43, and a ring gear 44. The planetary gear mechanism 4 is configured to reduce the rotation of the first axle shaft 1 and transmit it to the second axle shaft 2.
　サンギア４１は、第１アクスルシャフト１と一体的に回転する。詳細には、サンギア４１は、第１アクスルシャフト１の外周面に形成されている。サンギア４１は、第１アクスルシャフト１の軸方向外側端部に形成されている。なお、サンギア４１は、第１アクスルシャフト１とは別部材であり、第１アクスルシャフト１に固定されていてもよい。 The sun gear 41 rotates integrally with the first axle shaft 1. Specifically, the sun gear 41 is formed on the outer peripheral surface of the first axle shaft 1. The sun gear 41 is formed at the axially outer end of the first axle shaft 1. The sun gear 41 is a separate member from the first axle shaft 1 and may be fixed to the first axle shaft 1.
　各プラネタリギア４２は、サンギア４１と噛み合う。各プラネタリギア４２は、サンギア４１の周囲に配置されている。各プラネタリギア４２は、周方向に間隔をあけて配置されている。なお、周方向とは、第１アクスルシャフト１の中心軸線を中心とした円の周方向を示す。 Each planetary gear 42 meshes with the sun gear 41. Each planetary gear 42 is disposed around the sun gear 41. Each planetary gear 42 is arranged at intervals in the circumferential direction. The circumferential direction refers to the circumferential direction of a circle centered on the central axis of the first axle shaft 1.
　各プラネタリギア４２は、自転可能に配置されている。また、各プラネタリギア４２は、サンギア４１の周囲を公転可能に配置されている。 Each planetary gear 42 is arranged to be able to rotate. Each planetary gear 42 is arranged so as to be capable of revolving around the sun gear 41.
　キャリア４３は、各プラネタリギア４２を回転可能に支持する。キャリア４３は、各プラネタリギア４２の公転とともに回転する。すなわち、キャリア４３は、第１アクスルシャフト１の中心軸線を中心に回転可能である。各プラネタリギア４２は、キャリア４３に支持された状態で、自転可能であり、且つ、サンギア４１の周囲を公転可能である。 The carrier 43 supports each planetary gear 42 rotatably. The carrier 43 rotates with the revolution of each planetary gear 42. That is, the carrier 43 can rotate around the central axis of the first axle shaft 1. Each planetary gear 42 can rotate while being supported by the carrier 43, and can revolve around the sun gear 41.
　キャリア４３は、軸方向において、第１軸受部材５と当接している。詳細には、キャリア４３の軸方向外側の端部４３１は、第１軸受部材５と当接している。これによって、キャリア４３が軸方向外側へ移動することが規制される。なお、キャリア４３は、第１軸受部材５の内輪と当接している。 The carrier 43 is in contact with the first bearing member 5 in the axial direction. Specifically, the end portion 431 on the outer side in the axial direction of the carrier 43 is in contact with the first bearing member 5. This restricts the carrier 43 from moving outward in the axial direction. The carrier 43 is in contact with the inner ring of the first bearing member 5.
　図４は、アクスル装置１０の一部を示す拡大図である。図４に示すように、キャリア４３は、貫通孔４３２を有している。この貫通孔４３２内を、第２アクスルシャフト２が延びている。貫通孔４３２は、第１スプライン部４３３を有している。詳細には、貫通孔４３２の内壁面に、第１スプライン部４３３が形成されている。また、貫通孔４３２の軸方向内側端部には、肩部４３４が形成されている。すなわち、貫通孔４３２の軸方向内側端部は、貫通孔４３２の他の部分に比べて、半径が大きくなっている。 FIG. 4 is an enlarged view showing a part of the axle device 10. As shown in FIG. 4, the carrier 43 has a through hole 432. The second axle shaft 2 extends through the through hole 432. The through hole 432 has a first spline part 433. Specifically, a first spline portion 433 is formed on the inner wall surface of the through hole 432. Further, a shoulder portion 434 is formed at the inner end portion in the axial direction of the through hole 432. In other words, the axially inner end portion of the through hole 432 has a larger radius than other portions of the through hole 432.
　図３に示すように、リングギア４４は、各プラネタリギア４２と噛み合う。リングギア４４は、ハウジング３に固定されている。詳細には、リングギア４４は、ハウジング端部３２に固定されている。なお、リングギア４４は、ハウジング３の内周面に直接形成されていてもよい。 As shown in FIG. 3, the ring gear 44 meshes with each planetary gear 42. The ring gear 44 is fixed to the housing 3. Specifically, the ring gear 44 is fixed to the housing end 32. The ring gear 44 may be formed directly on the inner peripheral surface of the housing 3.
　第２アクスルシャフト２は、軸方向に延びている。詳細には、第２アクスルシャフト２の中心軸線と、第１アクスルシャフト１の中心軸線とは、実質的に同一の直線上に配置されている。第２アクスルシャフト２は、シャフト本体部２１と、先端部２２とを有する。シャフト本体部２１と先端部２２とは１つの部材によって形成されている。 The second axle shaft 2 extends in the axial direction. Specifically, the central axis of the second axle shaft 2 and the central axis of the first axle shaft 1 are arranged on substantially the same straight line. The second axle shaft 2 has a shaft main body portion 21 and a tip portion 22. The shaft main body portion 21 and the tip end portion 22 are formed of a single member.
　シャフト本体部２１は、ハウジング３内において、軸方向に延びている。シャフト本体部２１は、ハウジング３によって、回転可能に支持されている。詳細には、シャフト本体部２１は、第１軸受部材５及び第２軸受部材８を介して、ハウジング３に支持されている。 The shaft main body 21 extends in the axial direction in the housing 3. The shaft main body 21 is rotatably supported by the housing 3. Specifically, the shaft body 21 is supported by the housing 3 via the first bearing member 5 and the second bearing member 8.
　図４に示すように、シャフト本体部２１は、第２スプライン部２４を有している。第２スプライン部２４は、キャリア４３の第１スプライン部４３３に係合している。なお、第２スプライン部２４の一部は、第１スプライン部４３３と係合していない。第２スプライン部２４のうち、第１スプライン部４３３と係合する部分を係合部２４ａとする。 As shown in FIG. 4, the shaft main body 21 has a second spline portion 24. The second spline part 24 is engaged with the first spline part 433 of the carrier 43. A part of the second spline part 24 is not engaged with the first spline part 433. A portion of the second spline portion 24 that engages with the first spline portion 433 is referred to as an engagement portion 24a.
　第２スプライン部２４は、スプライン端部２４ｂを有している。スプライン端部２４ｂは、第２スプライン部２４の軸方向外側端部に配置されている。スプライン端部２４ｂは、第１スプライン部４３３と係合していない。 The second spline portion 24 has a spline end portion 24b. The spline end portion 24 b is disposed at the axially outer end portion of the second spline portion 24. The spline end portion 24 b is not engaged with the first spline portion 433.
　スプライン端部２４ｂは、軸方向の外側に向かって谷底の半径が大きくなる。詳細には、第２スプライン部２４は、複数の谷部と、複数の山部と、を有している。各谷部と各山部とは周方向に交互に配置されている。各谷部と各山部とは、軸方向に延びている。スプライン端部２４ｂにおいて、各谷部の谷底の半径は、軸方向の外側に向かって徐々に大きくなる。また、スプライン端部２４ｂにおける各山部の外径は、スプライン端部２４ｂ以外の第２スプライン部２４における各山部の外径よりも大きい。 In the spline end portion 24b, the radius of the valley bottom increases toward the outside in the axial direction. Specifically, the second spline part 24 has a plurality of valleys and a plurality of peaks. The valleys and the peaks are alternately arranged in the circumferential direction. Each trough and each peak extend in the axial direction. In the spline end portion 24b, the radius of the valley bottom of each valley portion gradually increases toward the outside in the axial direction. Moreover, the outer diameter of each peak part in the spline end part 24b is larger than the outer diameter of each peak part in the 2nd spline part 24 other than the spline end part 24b.
　具体的に説明すると、図１０に示すように、第２スプライン部２４は、円板状のカッタ２４０によって複数の谷部を形成することによって形成される。詳細には、カッタ２４０が、軸方向内側から軸方向外側に向かって移動しながら、シャフト本体部２１に谷部を形成する。このようにカッタ４０によって複数の谷部を形成すると、第２スプライン部２４の軸方向外側端部における各谷部は、カッタ２４０の外周縁に沿った形状となる。すなわち、第２スプライン部２４の軸方向外側端部における各谷部の谷底の半径は、軸方向の外側に向かって徐々に大きくなる。この軸方向外側端部が、スプライン端部２４ｂである。 More specifically, as shown in FIG. 10, the second spline portion 24 is formed by forming a plurality of valleys with a disc-shaped cutter 240. Specifically, the cutter 240 forms a trough in the shaft body 21 while moving from the axially inner side toward the axially outer side. When a plurality of valleys are formed by the cutter 40 in this manner, each valley at the axially outer end of the second spline part 24 has a shape along the outer peripheral edge of the cutter 240. That is, the radius of the valley bottom of each valley portion at the axially outer end portion of the second spline portion 24 gradually increases toward the outside in the axial direction. This axially outer end is the spline end 24b.
　図５は、第２アクスルシャフト２の一部を示す拡大図である。図５に示すように、第２アクスルシャフト２は、溝部２５をさらに有している。溝部２５は、第２スプライン部２４に形成されている。また、溝部２５は、係合部２４ａよりも軸方向の外側に配置される。詳細には、溝部２５は、スプライン端部２４ｂに形成されている。 FIG. 5 is an enlarged view showing a part of the second axle shaft 2. As shown in FIG. 5, the second axle shaft 2 further has a groove 25. The groove part 25 is formed in the second spline part 24. Moreover, the groove part 25 is arrange | positioned on the outer side of an axial direction rather than the engaging part 24a. Specifically, the groove portion 25 is formed in the spline end portion 24b.
　溝部２５は、第２スプライン部２４の各山部に形成されている。溝部２５は、シャフト本体部２１の周方向に延びている。溝部２５は、円周溝部である。溝部２５の内壁面は、滑らかな面から構成される。すなわち、溝部２５の内壁面の角部は円弧状となるように形成されている。詳細には、溝部２５は、半円形状の断面形状を有している。なお、溝部２５の断面とは、第２アクスルシャフト２の中心軸を通る平面で溝部２５を切断した断面を示す。また、半円形状とは、完全な半円形状のみを意味するのではなく、実質的な半円形状を含む概念である。 The groove portion 25 is formed in each peak portion of the second spline portion 24. The groove portion 25 extends in the circumferential direction of the shaft main body portion 21. The groove part 25 is a circumferential groove part. The inner wall surface of the groove part 25 is comprised from a smooth surface. That is, the corner of the inner wall surface of the groove 25 is formed in an arc shape. Specifically, the groove part 25 has a semicircular cross-sectional shape. In addition, the cross section of the groove part 25 shows the cross section which cut | disconnected the groove part 25 in the plane which passes along the central axis of the 2nd axle shaft 2. FIG. Further, the semicircular shape does not mean only a complete semicircular shape, but a concept including a substantial semicircular shape.
　図３に示すように、先端部２２は、ハウジング３から突出している。先端部２２は、後輪１０３が取り付けられるように構成されている。詳細には、ボルトなどを用いて、後輪１０３が先端部２２に取り付けられる。先端部２２の外形は、円形である。具体的には、先端部２２は、円板状である。先端部２２は、シャフト本体部２１よりも径が大きい。 As shown in FIG. 3, the tip 22 protrudes from the housing 3. The front end portion 22 is configured so that the rear wheel 103 is attached. Specifically, the rear wheel 103 is attached to the distal end portion 22 using a bolt or the like. The outer shape of the tip 22 is circular. Specifically, the tip portion 22 has a disk shape. The tip 22 has a larger diameter than the shaft body 21.
　第２アクスルシャフト２は、軸方向外側への移動が規制されている。図４に示すように、規制円板９が第２アクスルシャフト２に取り付けられている。例えば、規制円板９は、ボルト９０によって、第２アクスルシャフト２に取り付けられている。この規制円板９は、第２アクスルシャフト２の軸方向外側への移動を規制するように構成されている。 The second axle shaft 2 is restricted from moving outward in the axial direction. As shown in FIG. 4, a regulation disk 9 is attached to the second axle shaft 2. For example, the regulation disc 9 is attached to the second axle shaft 2 by a bolt 90. The restriction disc 9 is configured to restrict the movement of the second axle shaft 2 outward in the axial direction.
　規制円板９は、突出部９１を有している。突出部９１は、第２アクスルシャフト２の軸方向内側端部２３よりも、径方向に突出している。例えば、規制円板９は円板状であって、規制円板９の外径は、第２アクスルシャフト２の軸方向内側端部２３の外径よりも大きい。規制円板９の突出部９１は、軸方向において、キャリア４３の肩部４３４と当接する。 The regulation disc 9 has a protruding portion 91. The protruding portion 91 protrudes in the radial direction from the axially inner end portion 23 of the second axle shaft 2. For example, the restriction disk 9 is disk-shaped, and the outer diameter of the restriction disk 9 is larger than the outer diameter of the axially inner end 23 of the second axle shaft 2. The protruding portion 91 of the restriction disc 9 abuts on the shoulder portion 434 of the carrier 43 in the axial direction.
　規制部材６は、第２アクスルシャフト２の溝部２５に配置されている。すなわち、規制部材６は、係合部２４ａよりも軸方向の外側に配置され、第１軸受部材５よりも軸方向の内側に配置される。規制部材６は、溝部２５に配置された状態で、溝部２５から径方向外側に突出している。規制部材６の内周側部が溝部２５に嵌合され、規制部材６の外周側部が溝部２５から突出する。規制部材６は、第１軸受部材５の内径よりも大きい外径Ｄを有する（図６参照）。なお、キャリア４３は、規制部材６との干渉を回避するために、逃げ部４３５を有している。 The regulating member 6 is disposed in the groove portion 25 of the second axle shaft 2. That is, the restricting member 6 is disposed on the outer side in the axial direction than the engaging portion 24a, and is disposed on the inner side in the axial direction with respect to the first bearing member 5. The restricting member 6 protrudes radially outward from the groove 25 in a state where it is disposed in the groove 25. The inner peripheral side portion of the restricting member 6 is fitted into the groove portion 25, and the outer peripheral side portion of the restricting member 6 protrudes from the groove portion 25. The regulating member 6 has an outer diameter D that is larger than the inner diameter of the first bearing member 5 (see FIG. 6). The carrier 43 has an escape portion 435 in order to avoid interference with the regulating member 6.
　図６は、規制部材６を軸方向に沿って見た図である。図６に示すように、規制部材６は、Ｃ字状に形成されている。規制部材６は、例えば、ピアノ線、硬網線、バネ用鋼線などから形成されている。規制部材６の外径Ｄは、第１軸受部材５の内径よりも大きい。規制部材６は、例えば、止め輪である。 FIG. 6 is a view of the regulating member 6 viewed along the axial direction. As shown in FIG. 6, the regulating member 6 is formed in a C shape. The regulating member 6 is made of, for example, a piano wire, a hard net wire, a spring steel wire, or the like. The outer diameter D of the regulating member 6 is larger than the inner diameter of the first bearing member 5. The restricting member 6 is, for example, a retaining ring.
　図７は、図６のＶＩＩ－ＶＩＩ線断面図である。図７に示すように、規制部材６の断面形状は、直径ｄを有する円形状である。すなわち、規制部材６は、断面が円形状の棒状部材を湾曲させることによって、形成されている。溝部２５の円弧の半径は、規制部材６の断面の半径ｄ／２以下である。 FIG. 7 is a cross-sectional view taken along line VII-VII in FIG. As shown in FIG. 7, the cross-sectional shape of the regulating member 6 is a circular shape having a diameter d. That is, the regulating member 6 is formed by curving a rod-like member having a circular cross section. The radius of the arc of the groove 25 is equal to or less than the radius d / 2 of the cross section of the restricting member 6.
　図３に示すように、第１軸受部材５は、ハウジング３に支持されている。また、第１軸受部材５は、第２アクスルシャフト２を回転可能に支持している。詳細には、第１軸受部材５は、径方向において、ハウジング３と第２アクスルシャフト２との間に配置されている。第１軸受部材５は、第２アクスルシャフト２のシャフト本体部２１の外周面に取り付けられている。なお、第１軸受部材５は、第２スプライン部２４よりも軸方向外側に位置している。 As shown in FIG. 3, the first bearing member 5 is supported by the housing 3. Moreover, the 1st bearing member 5 is supporting the 2nd axle shaft 2 rotatably. Specifically, the first bearing member 5 is disposed between the housing 3 and the second axle shaft 2 in the radial direction. The first bearing member 5 is attached to the outer peripheral surface of the shaft main body 21 of the second axle shaft 2. The first bearing member 5 is located on the outer side in the axial direction than the second spline portion 24.
　第１軸受部材５は、軸方向の外側への移動が規制されるように、ハウジング３に支持されている。詳細には、上述したように、第１軸受部材５がハウジング３の突出部３３と当接することによって、第１軸受部材５は、軸方向の外側への移動が規制される。なお、第１軸受部材５が本発明の軸受部材に相当する。 The first bearing member 5 is supported by the housing 3 so as to be restricted from moving outward in the axial direction. Specifically, as described above, when the first bearing member 5 abuts on the protruding portion 33 of the housing 3, the first bearing member 5 is restricted from moving outward in the axial direction. The first bearing member 5 corresponds to the bearing member of the present invention.
　図５に示すように、第１軸受部材５の軸方向内側の内周端部５１は、面取り加工されている。例えば、第１軸受部材５の内周端部５１は、Ｒ面取り加工されている。このように内周端部５１は、Ｒ面取り加工されているため、径方向において内側を向いている。この結果、例えば、図８に示すように、第２アクスルシャフト２が軸方向外側に移動して規制部材６と第１軸受部材５とが当接した場合、第１軸受部材５の内周端部５１は、規制部材６を径方向内側に向かって押圧する。したがって、規制部材６が溝部２５から外れることを確実に防止できる。なお、規制部材６と第１軸受部材５とが当接するとき、第１軸受部材５の面取り加工された内周端部５１が規制部材６と当接するように構成される。 As shown in FIG. 5, the inner peripheral end 51 on the inner side in the axial direction of the first bearing member 5 is chamfered. For example, the inner peripheral end 51 of the first bearing member 5 is R-chamfered. Thus, since the inner peripheral end 51 is R-chamfered, it faces inward in the radial direction. As a result, for example, as shown in FIG. 8, when the second axle shaft 2 moves outward in the axial direction and the regulating member 6 and the first bearing member 5 come into contact with each other, the inner peripheral end of the first bearing member 5 The part 51 presses the regulating member 6 toward the radially inner side. Therefore, it is possible to reliably prevent the restricting member 6 from being detached from the groove portion 25. In addition, when the regulating member 6 and the first bearing member 5 come into contact with each other, the inner peripheral end portion 51 of which the first bearing member 5 is chamfered is configured to come into contact with the regulating member 6.
　図３に示すように、第２軸受部材８は、ハウジング３に支持されている。また、第２軸受部材８は、第２アクスルシャフト２を回転可能に支持している。詳細には、第２軸受部材８は、径方向において、ハウジング３と第２アクスルシャフト２との間に配置されている。第２軸受部材８は、第２アクスルシャフト２のシャフト本体部２１の外周面に取り付けられている。なお、第２軸受部材８は、第１軸受部材５よりも軸方向外側に位置している。 3, the second bearing member 8 is supported by the housing 3. Moreover, the 2nd bearing member 8 is supporting the 2nd axle shaft 2 rotatably. Specifically, the second bearing member 8 is disposed between the housing 3 and the second axle shaft 2 in the radial direction. The second bearing member 8 is attached to the outer peripheral surface of the shaft main body 21 of the second axle shaft 2. The second bearing member 8 is located on the outer side in the axial direction than the first bearing member 5.
　ブレーキ機構７は、後輪１０３の回転を制動するように構成されている。ブレーキ機構７は、多板型のブレーキ機構である。詳細には、ブレーキ機構７は、複数の回転ディスク７１と、複数の固定ディスク７２と、ピストン７３とを有している。 The brake mechanism 7 is configured to brake the rotation of the rear wheel 103. The brake mechanism 7 is a multi-plate brake mechanism. Specifically, the brake mechanism 7 includes a plurality of rotating disks 71, a plurality of fixed disks 72, and a piston 73.
　各回転ディスク７１は、第１アクスルシャフト１と一体的に回転する。詳細には、各回転ディスク７１は、中央部に貫通孔を有している。第１アクスルシャフト１は、各回転ディスク７１の貫通孔を貫通している。各回転ディスク７１は、第１アクスルシャフト１とスプライン係合されている。各回転ディスク７１は、軸方向に摺動可能である。 Each rotating disk 71 rotates integrally with the first axle shaft 1. Specifically, each rotating disk 71 has a through hole in the center. The first axle shaft 1 passes through the through hole of each rotary disk 71. Each rotating disk 71 is spline-engaged with the first axle shaft 1. Each rotary disk 71 is slidable in the axial direction.
　各固定ディスク７２は、ハウジング３とスプライン係合されている。すなわち、各固定ディスク７２は、回転しない。なお、各固定ディスク７２は、軸方向に摺動可能である。 Each fixed disk 72 is spline-engaged with the housing 3. That is, each fixed disk 72 does not rotate. Each fixed disk 72 is slidable in the axial direction.
　ピストン７３が軸方向外側に各回転ディスク７１及び各固定ディスク７２を押圧することによって、各回転ディスク７１と各固定ディスク７２とが互いに摩擦係合し、第１アクスルシャフト１の回転を制動する。 When the piston 73 presses the rotary disks 71 and the fixed disks 72 outward in the axial direction, the rotary disks 71 and the fixed disks 72 are frictionally engaged with each other, and the rotation of the first axle shaft 1 is braked.
　以上説明した本実施形態に係るアクスル装置１０は、規制部材６が溝部２５から径方向外側に突出している。そして、この規制部材６の外径Ｄは、第１軸受部材５の内径よりも大きい。このため、図８に示すように、第２アクスルシャフト２が軸方向の外側に移動しても、規制部材６が第１軸受部材５と当接して、第２アクスルシャフト２の軸方向の外側への移動が規制される。よって、アクスル装置１０を大型化することなく、ホイールを保持する保持力を向上させることができる。 In the axle device 10 according to this embodiment described above, the restricting member 6 protrudes radially outward from the groove portion 25. The outer diameter D of the restricting member 6 is larger than the inner diameter of the first bearing member 5. For this reason, as shown in FIG. 8, even if the second axle shaft 2 moves outward in the axial direction, the regulating member 6 contacts the first bearing member 5, and the outer side in the axial direction of the second axle shaft 2. Movement to is regulated. Therefore, the holding force for holding the wheel can be improved without increasing the size of the axle device 10.
　［変形例］
　以上、本発明の実施形態について説明したが、本発明はこれらに限定されるものではなく、本発明の趣旨を逸脱しない限りにおいて種々の変更が可能である。 [Modification]
As mentioned above, although embodiment of this invention was described, this invention is not limited to these, A various change is possible unless it deviates from the meaning of this invention.
　変形例１
　図９に示すように、第１軸受部材５と規制部材６との間にスペーサ１１が配置されていてもよい。 Modification 1
As shown in FIG. 9, a spacer 11 may be disposed between the first bearing member 5 and the regulating member 6.
　変形例２
　上記実施形態では、突出部３３は、環状であったが、特にこれに限定されない。例えば、ハウジング３は複数の突出部３３を有しており、各突出部３３は互いに間隔をあけて周方向に沿って配置されていてもよい。 Modification 2
In the said embodiment, although the protrusion part 33 was cyclic | annular, it is not specifically limited to this. For example, the housing 3 has a plurality of protrusions 33, and the protrusions 33 may be arranged along the circumferential direction at intervals.
　変形例３
　上記実施形態では、後輪のアクスル装置について説明したが、前輪のアクスル装置も同様の構成とすることができる。 Modification 3
Although the rear wheel axle device has been described in the above embodiment, the front wheel axle device may have the same configuration.
　変形例４
　上記実施形態において、作業車両としてホイールローダを例示したが、本発明が適用される作業車両はホイールローダに限定されない。例えば、本発明に係るアクスル装置は、バックホーローダなどの他の作業車両にも適用可能である。 Modification 4
In the said embodiment, although the wheel loader was illustrated as a working vehicle, the working vehicle to which this invention is applied is not limited to a wheel loader. For example, the axle device according to the present invention can be applied to other work vehicles such as a backhoe loader.
　変形例５
　上記実施形態では、溝部２５は、周方向に連続して延びているが、溝部２５の形状は、特にこれに限定されない。例えば、溝部２５は、周方向に断続的に延びていてもよい。この場合、ホイールローダ１００は、複数の規制部材９を有する。各規制部材９は、各溝部２５に配置されている。 Modification 5
In the said embodiment, although the groove part 25 is continuously extended in the circumferential direction, the shape of the groove part 25 is not specifically limited to this. For example, the groove part 25 may extend intermittently in the circumferential direction. In this case, the wheel loader 100 has a plurality of regulating members 9. Each regulating member 9 is arranged in each groove 25.
　変形例６
　上記実施形態では、規制部材９は円環状であるが、規制部材９の形状は特にこれに限定されない。例えば、規制部材９は、矩形の環状であってもよい。 Modification 6
In the said embodiment, although the control member 9 is annular, the shape of the control member 9 is not specifically limited to this. For example, the restriction member 9 may be a rectangular ring.
　１　　第１アクスルシャフト
　２　　第２アクスルシャフト
　２１　　シャフト本体部
　２２　　先端部
　２４　　第２スプライン部
　２４ａ　　係合部
　２４ｂ　　スプライン端部
　２５　　溝部
　３　　ハウジング
　３３　　突出部
　４　　遊星歯車機構
　４１　　サンギア
　４２　　プラネタリギア
　４３　　キャリア
　４３２　　貫通孔
　４３３　　第１スプライン部
　４４　　リングギア
　５　　第１軸受部材
　６　　規制部材
　１０　　アクスル装置
　１００　　作業車両
　１０１　　車体フレーム DESCRIPTION OF SYMBOLS 1 1st axle shaft 2 2nd axle shaft 21 Shaft main-body part 22 Front-end | tip part 24 2nd spline part 24a Engagement part 24b Spline end part 25 Groove part 3 Housing 33 Protrusion part 4 Planetary gear mechanism 41 Sun gear 42 Planetary gear 43 Carrier 432 Through Hole 433 First spline portion 44 Ring gear 5 First bearing member 6 Restriction member 10 Axle device 100 Work vehicle 101 Body frame

Claims (9)

  1. ハウジングと、
    　軸方向に延びる第１アクスルシャフトと、
    　前記第１アクスルシャフトと一体的に回転するサンギア、前記サンギアと噛み合うプラネタリギア、第１スプライン部を含む貫通孔を有し前記プラネタリギアを回転可能に支持するキャリア、及び前記ハウジングに固定されて前記プラネタリギアと噛み合うリングギアを有し、前記ハウジングに収容された遊星歯車機構と、
    　前記第１スプライン部と係合する第２スプライン部を有し前記ハウジング内において前記軸方向に延びるシャフト本体部、及び、前記ハウジングから前記軸方向の外側に突出する先端部、及び前記第２スプライン部において周方向に延びる溝部を有する第２アスクルシャフトと、
    　前記ハウジングに支持され、前記第２アクスルシャフトを回転可能に支持する軸受部材と、
    　前記溝部に配置され、前記溝部から径方向外側に突出する規制部材と、
    を備え、
    　前記第２スプライン部は、前記第１スプライン部と係合する係合部を有し、
    　前記規制部材は、前記係合部よりも軸方向の外側に配置され、前記軸受部材よりも軸方向の内側に配置される、
    アクスル装置。
          A housing;
    A first axle shaft extending in the axial direction;
    A sun gear that rotates integrally with the first axle shaft, a planetary gear that meshes with the sun gear, a carrier that has a through hole including a first spline portion, and rotatably supports the planetary gear, and is fixed to the housing and fixed to the housing A planetary gear mechanism having a ring gear meshing with a planetary gear and housed in the housing;
    A shaft main body having a second spline portion engaged with the first spline portion and extending in the axial direction in the housing, a tip portion protruding outward in the axial direction from the housing, and the second spline A second axle shaft having a groove extending in the circumferential direction at the portion;
    A bearing member supported by the housing and rotatably supporting the second axle shaft;
    A restricting member disposed in the groove and projecting radially outward from the groove;
    With
    The second spline part has an engaging part that engages with the first spline part,
    The restriction member is disposed on the outer side in the axial direction than the engaging portion, and is disposed on the inner side in the axial direction with respect to the bearing member.
    Axle device.
  2. 　前記第２スプライン部は、前記軸方向の外側端部に、前記軸方向の外側に向かって谷底の径が大きくなるスプライン端部を有し、
    　前記溝部は、前記スプライン端部に形成される、
    請求項１に記載のアクスル装置。
          The second spline portion has a spline end portion in which the diameter of the valley bottom increases toward the outside in the axial direction at the outer end portion in the axial direction,
    The groove is formed at the spline end.
    The axle device according to claim 1.
  3. 　前記規制部材は、円環状に形成されており、円形状の断面を有する、
    請求項１又は２に記載のアクスル装置。
          The regulating member is formed in an annular shape and has a circular cross section.
    The axle device according to claim 1 or 2.
  4. 　前記ハウジングは、内周面から径方向内側に突出する突出部を有し、
    　前記軸受部材は、軸方向内側から前記突出部と当接する、
    請求項１から３のいずれかに記載のアクスル装置。
          The housing has a protruding portion protruding radially inward from the inner peripheral surface,
    The bearing member is in contact with the protrusion from the inside in the axial direction;
    The axle device according to any one of claims 1 to 3.
  5. 　前記軸受部材の軸方向内側の内周側端部は、面取り加工されている、
    請求項１から４のいずれかに記載のアクスル装置。
          The inner peripheral side end on the axially inner side of the bearing member is chamfered.
    The axle device according to any one of claims 1 to 4.
  6. 　前記軸受部材の軸方向内側の内周端部は、Ｒ面取り加工されている、
    請求項５に記載のアクスル装置。
          The inner peripheral end portion on the inner side in the axial direction of the bearing member is R chamfered.
    The axle device according to claim 5.
  7. 　前記第２スプライン部は、複数の谷部と複数の山部とを有し、
    　前記溝部は、前記各山部に形成される、
    請求項１から６のいずれかに記載のアクスル装置。
          The second spline portion has a plurality of valleys and a plurality of peaks.
    The groove is formed in each of the peaks.
    The axle device according to any one of claims 1 to 6.
  8. 　前記軸受部材と前記規制部材との間に少なくとも１つのスペーサをさらに備える、
    請求項１から７のいずれかに記載のアクスル装置。
          Further comprising at least one spacer between the bearing member and the regulating member;
    The axle device according to any one of claims 1 to 7.
  9. 　請求項１から８のいずれかに記載のアクスル装置と、
    　前記アクスル装置が取り付けられる車体フレームと、
    　前記第２アクスルシャフトの先端部に取り付けられる車輪と、
    を備える、作業車両。
          An axle device according to any of claims 1 to 8,
    A vehicle body frame to which the axle device is attached;
    A wheel attached to the tip of the second axle shaft;
    A work vehicle comprising:
PCT/JP2014/070183 2014-07-31 2014-07-31 Axle device and work vehicle WO2016016990A1 (en)

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Application Number Priority Date Filing Date Title
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Publications (1)

Publication Number Publication Date
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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH041710U (en) * 1990-04-20 1992-01-08
JPH0771568A (en) * 1993-06-29 1995-03-17 Komatsu Ltd Bearing fixing device of epicycle reduction gear
JP2008247055A (en) * 2007-03-29 2008-10-16 Komatsu Ltd Reduction type axle device
JP2013127280A (en) * 2011-12-16 2013-06-27 Toyota Motor Corp Differential device for vehicle

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH041710U (en) * 1990-04-20 1992-01-08
JPH0771568A (en) * 1993-06-29 1995-03-17 Komatsu Ltd Bearing fixing device of epicycle reduction gear
JP2008247055A (en) * 2007-03-29 2008-10-16 Komatsu Ltd Reduction type axle device
JP2013127280A (en) * 2011-12-16 2013-06-27 Toyota Motor Corp Differential device for vehicle

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
KOROGARI JIKUUKE KOGAKU, 20 January 1978 (1978-01-20), pages 40 *

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