JP4565851B2 - Reducer for vehicle - Google Patents

Description

  The present invention is applied to various vehicles such as a container carrier for carrying a cargo by supporting a container by the load support device, which is provided on a portal-type traveling body which can run freely, for example, via a lifting and lowering device. Speed reduction device, that is, an input shaft and an output shaft are arranged at right angles, and each case body side is rotatably supported via a bearing device, and the bevel gear device for speed reduction between both shafts in the case body And a speed reducer for a vehicle in which lubricating oil is placed in the case body.

Conventionally, as this type of device, there has been provided a configuration in which the lubricating oil that has been lifted up by the ring gear is collected by a guide rod (guide) provided in the casing and guided above the bearing in the vicinity of the ring gear ( For example, see Patent Document 1.)
JP 2001-159460 A (page 3, FIG. 1)

  However, according to the conventional configuration described above, since the guide is manufactured separately and attached to the differential cover, it is troublesome to manufacture and assemble, and in the type in which the differential pinion extends upward, the lubricating oil is smooth. Can not be supplied.

  Therefore, according to the first aspect of the present invention, the lubricating oil can be smoothly supplied to a bearing device of a type that can be easily manufactured and assembled, and is arranged so that the input shaft extends upward (in the vertical direction). It is an object of the present invention to provide a vehicle speed reduction device.

In order to achieve the above-described object, in the vehicle speed reducing device according to claim 1 of the present invention, the input shaft and the output shaft are arranged at right angles, and each case body is freely rotatable via a bearing device. And a speed reduction bevel gear device provided between the two shafts in the case body, and a vehicle speed reduction device in which lubricating oil is placed in the case body, the penetrating hole formed in the upper side wall plate of the case body A bearing cage is provided at the part, and a ring body that can contact the bearing cage from above is provided. The input shaft is rotatably supported on the bearing cage side via the bearing, and the ring body A seal body is provided between the upper side wall plate, the bearing cage and the ring body. Lubricating oil introducing path is formed with a plurality, on the inner surface side of the upper side wall plates, a pair of ribs formed to project extending radially to the axis of the input shaft, the pair of ribs are formed at an angle Thus, the lubricating oil guiding surface is formed by the longitudinal surfaces inclined to the opposite sides, and the inlet end of the lubricating oil introduction path is located at the inner end side position of these lubricating oil guiding surfaces. It is what.

Therefore, according to the first aspect of the present invention, the forward / reverse rotation of the input shaft can be transmitted to the output shaft via the bevel gear device, and the output shaft can be decelerated and rotated forward / reversely. At that time, the lubricating oil that has been lifted up by forward and reverse rotation of the bevel gear device can collide with the inner surface of the upper side wall plate in the case body, and then can flow along the inner surface to the bearing device side. Then, the lubricating oil pumped up by the forward / reverse rotation is guided by the corresponding lubricating oil guide surface of the rib in the forward / reverse rotation direction and flows into the inlet end of one of the lubricating oil introduction paths, and then this lubricating oil is introduced. It can be introduced above the bearing through a path. The bearing can be lubricated by allowing the lubricating oil introduced above the bearing to flow downward in the bearing without leaking to the outside by the sealing body.

  According to a second aspect of the present invention, there is provided the vehicle speed reducing device according to the first aspect, in which the lubricating oil from the bearing side is discharged into the case body from the bearing cage to the upper side wall plate. A discharge path is formed.

  Therefore, according to the second aspect of the present invention, the lubricating oil that has lubricated the bearing by flowing downward can be guided to the lubricating oil discharge path and discharged into the case body.

According to the first aspect of the present invention described above, the lubricating oil that has been swept up by forward and reverse rotation of the bevel gear device can collide with the inner surface of the upper side wall plate in the case body, and then can flow along the inner surface to the bearing device side. . Then, after the lubricating oil swept up by forward and reverse rotation is guided by the lubricating oil guide surface of the corresponding rib in the forward and reverse rotational directions and flows into the inlet end of any lubricating oil introduction path, this lubricating oil introduction path Can be introduced above the bearing. The bearing can be lubricated by causing the lubricating oil introduced above the bearing to flow downward in the bearing without leaking to the outside by the sealing body. As a result, since it is only necessary to integrally form the rib group on the upper side wall plate, it is easy to manufacture and assemble, and the lubricating oil is applied to the bearing device of a type in which the input shaft extends upward. Smooth supply.

  According to the second aspect of the present invention, the lubricating oil that has lubricated the bearing by flowing downward can be discharged into the case body through the lubricating oil discharge path.

[Embodiment]
Below, an embodiment of the invention is described based on a figure as a state adopted as a wheel drive part.

  The vehicle speed reduction device 1 is provided as a pair with the wheel device 40 in a state where its output shaft is a wheel shaft. That is, the case body 2 of the speed reducer 1 includes an upper side wall plate 2A, left and right outer side wall plates 2B and inner side wall plates 2C, a front side wall plate (rear side wall plate) 2D, a rear side wall plate (front side wall plate) 2E, and a connector 3. It is configured in a rectangular box shape by a lower side wall plate 2F that is detachable via the. A vertical through portion 4 is formed at the central portion of the upper side wall plate 2A, and left and right through portions 5 and 6 are formed at the central portions of the outer wall plate 2B and the inner side wall plate 2C, respectively. The through portion 6 of the inner wall plate 2C is closed by a detachable cover plate 8 via a connector 7.

  On the case body 2 side, a vertical pinion gear shaft (an example of an input shaft) 10 and a wheel shaft 11 (an example of an output shaft) 11 in the left-right direction (lateral direction) are disposed at right angles, and the case body 2 respectively. The bearings 20 and 19 are rotatably supported on the side. A reduction bevel gear device 13 is provided between the shafts 10 and 11 in the case body 2.

  That is, a bearing cage 21 is provided in the penetrating portion 4 formed in the upper side wall plate 2A. The bearing cage 21 contacts the cylindrical portion 21a fitted in the through portion 4 and the upper surface of the upper side wall plate 2A. It is formed with the collar part 21b which can contact. A ring body 22 that can freely come into contact with the flange portion 21b is provided, and a recess 22a is formed on the inner surface side (lower surface side) of the ring body 22. The ring body 22 and the bearing cage 21 are connected to the upper wall plate 2A side by a plurality of bolts 23 that are passed from the ring body 22 to the flange portion 21b and screwed to the upper wall plate 2A.

  The pinion gear shaft 10 is rotatably supported on the bearing cage 21 via a pair of upper and lower bearings 24A and 24B provided between the cylindrical portion 21a of the bearing cage 21. The lower end (inner end) of the pinion gear shaft 10 is rotatably supported via a bearing 25 on an intermediate wall plate 2G provided continuously from the inner surface side of the case body 2. A flange 28 is fixed to the upper end portion (outer end portion) of the pinion gear shaft 10, and a drive shaft or the like can be connected to the flange 28. A seal body 26 is provided between the flange 28 and the ring body 22, and a cover body 27 located outside the seal body 26 is provided on the flange 28 side. An example of the bearing device 20 is configured by the above 21 to 27 and the like.

  The wheel shaft 11 is disposed through a penetrating portion 5 formed in the outer wall plate 2B, and a gear hub 14 is connected to the inner end thereof by a spline fitting 15. The gear hub 14 is rotatably supported on the case body 2 via the bearing device 19 including a pair of bearings. A passive ring gear 16 is connected to the gear hub 14 through a group of connecting members 17, and a drive pinion gear 18 that is always meshed with the ring gear 16 is formed at the inner end portion of the pinion gear shaft 10. An example of the bevel gear device 13 is configured by the above 14 to 18 and the like. In the case body 2, lubricating oil O is placed at a level below the wheel shaft 11.

  In the bearing device 20 of the pinion gear shaft 10, a plurality of lubricating oil introduction paths 30 that guide the lubricating oil O transmitted through the lower surface (inner surface) of the upper side wall plate 2 </ b> A in the case body 2 to the upper bearing 24 </ b> A. A plurality of lubricating oil discharge paths 35 for discharging the lubricating oil O from the bearings 24A and 24B into the case body 2 are formed.

  That is, through-holes 31 and 32 in the vertical direction communicating with each other from the upper side wall plate 2A to the flange portion 21b of the bearing cage 21 are formed, and the ring body 22 communicates with the through-hole 32 and has a recess 22a. A notch 33 that is open to the side is formed. The above 31-33 etc. comprise an example of the lubricating oil introduction path | route 30, and the entrance end of the lubricating oil introduction path | route 30 is formed by the through-hole 31 in that case.

  Further, a pair of ribs (protrusions) 2H and 2I extending in the radial direction with respect to the axis of the pinion gear shaft 10 are formed on the lower surface (inner surface) side of the upper side wall plate 2A. Here, the pair of ribs 2H and 2I are formed at an angle of approximately 60 degrees in the front-rear direction, and thus the lubricating oil guide surfaces 2h and 2i are formed by longitudinal surfaces inclined to the opposite sides. . The lubricating oil introduction path 30 is formed in two places (a plurality of places) around the pinion gear shaft 10 in a state where the through hole (entrance end) 31 is located at the inner end side position of the lubricating oil guide surfaces 2h and 2i. ing.

  At two locations (single location or multiple locations) different from the group 30 for introducing the lubricating oil, a lateral through hole 36 is formed in the cylindrical portion 21a of the bearing cage 21, and the upper side wall plate 2A has Is formed with a notch 37 that communicates with the through-hole 36 and opens into the case body 2. An example of the lubricating oil discharge path 35 is configured by the above 36 to 37 and the like. A part of the lubricating oil is discharged into the case body 2 through the clearance of the lower bearing 24 </ b> B without passing through the lubricating oil discharge path 35.

  The wheel device 40 includes a cylindrical rotating body 42 that is externally fitted to the wheel shaft 11 and has an inner end connected to the outer wall plate 2B via a connector 41, and an external fit to the rotating body 42. A wheel hub 44 whose inner portion is rotatably supported via a bearing 43, a rim 46 connected to the outer peripheral side of the wheel hub 44 via a connector 45, and the rim 46. A tire carrier 47 and a planet carrier 49 connected to the outer surface side of the wheel hub 44 via a connector 48 are included. A reduction gear device 50 is disposed between the outer portion of the wheel hub 44 and the wheel shaft 11, and the wheel shaft 11 is linked to the rim 46 via the reduction gear device 50.

  That is, the reduction gear device 50 includes a sun gear 51 formed on the outer end of the wheel shaft 11 and a planet gear 52 provided on the planet carrier 49. Here, the planet gear 52 is provided on a planet carrier 49 via a gear shaft 53 in a direction along the wheel shaft 11 so as to be freely rotatable, and has an internal tooth shape fixed to the sun gear 51 and the axle case 54. By being meshed with the ring gear 55 at the same time, it is configured to revolve around the wheel shaft 11. An example of the reduction gear device 50 is configured by the above 51 to 55 and the like. The planet carrier 49 is provided with a cover body 56 located outside the reduction gear device 50.

  A recess 59 is formed between the wheel hub 44 and the rim 46, and the recess 59 is used between the outer wall plate (fixed portion) 2 </ b> B side and the wheel hub (rotating portion) 44. A brake device 60 is provided. The brake device 60 has a pair of brake pads 61. The brake pads 61 can be moved toward and away from each other via a cylinder device 63 on the side of a fixing member 62 connected to the outer wall plate 2B, that is, a wheel. It is provided so as to be movable along the axial direction of the shaft 11. A ring-shaped brake disc 64 positioned between the brake pads 61 is connected to the wheel hub 44 via a connector 65. An example of the brake device 60 is configured by the above 61-65 and the like, and an example of the wheel device 40 is configured by 41-65 and the like.

The operation in the above embodiment will be described below.
The rotation of the drive shaft is transmitted to the flange 28, the pinion gear shaft 10, the drive pinion gear 18, the ring gear 16, the gear hub 14, and the wheel shaft 11, and is thus transmitted to the wheel hub 44 via the reduction gear device 50. At that time, the reduction gear device 50 rotates the planet gear 52 by rotating the sun gear 51 to cause the planet carrier 49 to rotate and thereby rotate the planet carrier 49 at a reduced speed, thereby rotating the tire 47 integrally through the wheel hub 44 and the rim 46. Let In such a rotation state, the brake device 61 is brought into pressure contact with the brake disc 64 by the operation of the cylinder device 63, so that the intended braking action is performed by the operation of the brake device 60.

  As the rotation as described above is performed in the forward and reverse directions, the vehicle moves forward or backward. For example, as shown in FIGS. 1, 3, and 5, in the state where the ring gear 16 is rotating in the direction A, the lubricating oil OA that is swept up by the ring gear 16 After colliding with the (inner surface) 2a, it flows along the lower surface 2a and flows toward the bearing device 20. The lubricating oil OA is guided to the lubricating oil guide surface 2h of the rib 2H and flows into the through hole 31, and then flows from the through hole 32 to the notch 33. That is, the lubricating oil OA is guided to the lubricating oil introduction path 30 and flows into the upper bearing 24A.

  Then, as shown in FIG. 4, the lubricating oil OA flows downward in the upper bearing 24A to lubricate the upper bearing 24A, and then flows from the through hole 36 to the cutout portion 37 to flow into the case body 2. Discharged inside. That is, the lubricating oil OA is guided to the lubricating oil discharge path 35 and flows into the case body 2. Part of the lubricating oil OA that has lubricated the upper bearing 24A flows downward in the lower bearing 24B, thereby lubricating the lower bearing 24B and thereafter being discharged into the case body 2.

  For example, as shown in FIGS. 1, 3, and 5, when the ring gear 16 is rotating in the B direction, the lubricating oil OB lifted up by the ring gear 16 is removed from the upper side wall plate 2 </ b> A in the case body 2. After colliding with the lower surface 2a, the air flows along the lower surface 2a and flows to the bearing device 20 side. The lubricating oil OB is guided to the lubricating oil guide surface 2i of the rib 2I and flows into the through hole 31, and then flows from the through hole 32 to the notch 33. That is, the lubricating oil OB is guided to the lubricating oil introduction path 30 and flows into the upper bearing 24A. Then, as shown in FIG. 4, that is, the lubricating oil OB lubricates the upper bearing 24A and then is guided to the lubricating oil discharge path 35 and flows into the case body 2 or lubricates the lower bearing 24B. After that, it is discharged into the case body 2.

  As described above, the lubricating oils OA and OB guided to the lubricating oil introduction path 30 and flowing into the upper part of the upper bearing 24A flow into the upper part of the upper bearing 24A without leaking to the outside by the seal body 26. It will be.

  In the above-described embodiment, the pair of the ribs 2H and 2I and the lubricating oil introduction path 30 is one set, and two sets are provided. However, this is a form in which four or six sets are provided. It may be.

  In the above-described embodiment, the bearing device 20 has a form composed of a pair of upper and lower bearings 24A and 24B. However, this is a form composed of one bearing, a form composed of three or more bearings, and the like. Also good.

  In the above-described embodiment, the reduction gear 1 combined with the wheel device 40 is shown, but this may be the reduction gear 1 combined with other devices.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows an embodiment of the present invention and is a longitudinal front view of a lubricating oil introduction path portion in a vehicle speed reducing device. It is a longitudinal front view of the speed reducer and wheel device for the vehicle. It is a vertical side view of the speed reducer for the vehicle. It is a vertical front view of the lubricating oil discharge path | route part in the deceleration device for the vehicles. It is a partially cutaway plan view of the speed reducer for the vehicle.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Deceleration apparatus for vehicles 2 Case body 2A Upper side wall board 2a Lower surface (inner surface)
2H Rib 2h Lubricating oil guide surface 2I Rib 2i Lubricating oil guide surface 4 Through part 5 Through part 6 Through part 10 Pinion gear shaft (input shaft)
11 Wheel shaft (output shaft)
13 bevel gear device 16 ring gear 18 drive pinion gear 19 bearing device 20 bearing device 21 bearing cage 21a cylindrical portion 21b flange 22 ring body 22a recess 24A bearing 24B bearing 26 seal body 30 lubricating oil introduction path 31 through hole (entrance end)
32 Through-hole 33 Notch 35 Lubricant oil discharge path 36 Through-hole 37 Notch 40 Wheel device 42 Rotating body 44 Wheel hub 46 Rim 47 Tire 49 Planet carrier 50 Reduction gear device 51 Sun gear 52 Planet gear 54 Axle case 55 Ring gear 60 Brake device O Lubricating oil OA Lubricating oil OB Lubricating oil

Claims (2)

The input shaft and the output shaft are disposed at right angles, and are rotatably supported by bearings on the case body side, respectively, and a reduction bevel gear device is provided between the shafts in the case body. A vehicle speed reducer with lubricating oil
A bearing cage is provided in a penetrating portion formed in the upper side wall plate of the case body, and a ring body that can be contacted from above with respect to the bearing cage is provided, and the input shaft is connected to the bearing cage via a bearing. And a seal member is provided between the ring member and the bearing member. The lubricating oil that has been transmitted along the inner surface of the upper side wall plate from the upper side wall plate to the bearing cage and the ring body. lubricating oil introducing path for guiding upward are formed a plurality, on the inner surface side of the upper side wall plates, a pair of ribs formed to project extending radially to the axis of the input shaft, the pair of ribs, at an angle by being formed Te, with lubricant guiding surface is formed by a longitudinal surface inclined in opposite side enters the lubricating oil introducing passage to the inner end side position of the lubricating oil guiding face Reduction gear for a vehicle, characterized in that the end is positioned.   2. The speed reducer for a vehicle according to claim 1, wherein a lubricating oil discharge path for discharging lubricating oil from the bearing side into the case body is formed from the bearing cage to the upper side wall plate.

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