JP2006290039A - Travelling device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a travelling device furnished with a hollow suspension member extended and provided on a car body and to externally fit a wheel base part of a wheel on it rotatably and a speed reducer buried in the suspension member and free to transmit output of a motor to the wheel base by amplifying it and is devised capable of restraining deterioration of an inside conduit as well as easily and liquid-tightly fixing an end part of the inside conduit extending through the speed reducer in the suspension member on a partition member of the suspension member from outside and improving a maintenance property. <P>SOLUTION: The end part of the inside conduit 60 extending through the speed reducer in the suspension member is provided so as to project from the partition member through a conduit through hole 71A of the partition member 71, and the end part of the inside conduit is fixed on the partition member from outside of the partition member by fastening means 73, 74, etc. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a traveling device, and more particularly, to a suspension member that supports a wheel and is used in a large-sized transport vehicle that mainly transports crushed stones in an open pit quarry, a quarry, a mine, etc. The present invention relates to a technique suitable for a traveling device configured to transmit the output of a prime mover to wheels via an internally reduced gear.

Large-scale transport vehicles (mining dump trucks, etc.) that mainly carry crushed stones in open-pit mines, quarries, mines, etc. can reduce the weight of power transmission members, etc. For the purpose, a reduction gear is embedded in a suspension member that supports the wheel, and the output of the prime mover (electric motor or the like) is amplified and transmitted to the wheel via the reduction gear.
By the way, in the traveling device having such a configuration, a brake head is generally provided on a cover (partition member) at the tip of the suspension member for reasons such as easy maintenance work from the outside. The brake is provided by sandwiching the brake disc between the brake heads. Specifically, pressure oil is supplied to the brake head, and the hydraulic piston is operated by supplying the pressure oil to the hydraulic cylinder of the brake head so as to sandwich the brake disk.

For this reason, it is necessary to supply the pressure oil to the brake head provided in the cover (partition member) at the tip of the suspension member. For example, the hydraulic line (internal conduit) passes through the suspension member. Thus, a configuration is conceived in which the cover is disposed up to the joint and the joint to the brake head provided on the cover are connected by an external pipe (hose or the like).
In this case, since the speed reducer is embedded in the suspension member, it is necessary to dispose the hydraulic line while avoiding gears of the speed reducer. Normally, the hydraulic line is the same as the external line. The bendable hose (rubber hose etc.) is adopted.

Since the lubricating oil for the speed reducer is scattered inside the suspension member, the hose is joined to the cover as shown in FIGS. 4 and 5 so that the lubricating oil does not leak to the outside. ing.
That is, as shown in FIG. 4, a metal fitting 102 is connected to the end portion of the hose 100 that is disposed inside the suspension member and is located in the through hole 122 of the cover 120, and the metal fitting 102 is connected to the joint plate 110 for piping by a bolt. At 112, it is liquid-tightly attached. Thereafter, the joint plate for piping 110 is liquid-tightly fixed to the periphery of the through hole 122 of the cover 120 with bolts 124.

  Alternatively, as shown in FIG. 5, the rubber bush 130 is fitted in the through hole 122 ′ of the cover 120, and the hose 100 is inserted through the rubber bush 130.

  When the hose 100 is fixed to the cover 120 as shown in FIG. 4 above, when the metal fitting 102 connected to the end of the hose 100 is attached to the joint plate 110 for piping with the bolt 112, the attachment is made inside the suspension member (drawing). There is a problem that the work must be performed in the direction from the left) to the outside (the right in the drawing), and the work is complicated and the workability is poor during the maintenance work.

On the other hand, when the hose 100 is inserted through the rubber bush 130 as shown in FIG. 5, the hose 100 cannot be sufficiently fixed to the cover 120, and the rubber deteriorates due to vibration, secular change, etc., causing oil leakage. There is a problem. Therefore, maintenance work is frequently required, which is not preferable.
Further, when a hose is used as a hydraulic line, there is a problem that it is more likely to deteriorate than when a metal tube such as a steel pipe is used as a hydraulic line, and maintenance work is frequently required.

This problem is not limited to the case where pressure oil is supplied to the brake head, but the lubricating oil is supplied from the outside of the cover to the reduction gear inside the suspension member with the same arrangement and supplied to the outside of the cover. The same applies to the case of providing an external pipe for oil (such as a hose).
The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a hollow suspension member that extends from the vehicle body and rotatably fits a wheel portion of a wheel, and the suspension. In a traveling device comprising a speed reducer embedded in a member and capable of amplifying the output of a prime mover and transmitting it to the wheel, the end of an internal conduit extending through the speed reducer is suspended in the suspension member. It is an object of the present invention to provide a traveling device that can be easily and liquid-tightly fixed to a member from the outside and can suppress deterioration of the internal pipe line, thereby improving maintainability.

  In order to achieve the above object, a traveling device according to claim 1 is provided with a hollow suspension member that extends from a vehicle body and rotatably fits a wheel portion of a wheel, and is embedded in the suspension member. In a traveling device comprising a speed reducer capable of amplifying and transmitting to the wheel, a partition member that partitions the space in the suspension member at at least one end on the vehicle body side and the side away from the vehicle body of the suspension member; An end portion that extends through the suspension member through the speed reducer and is connected to an external pipe line is provided so as to protrude from the partition member through a pipe through hole of the partition member. An internal conduit through which oil flows is provided, and fastening means for fixing the end of the internal conduit to the partition member from the outside of the partition member.

  That is, a partition member is provided at least at one end on the vehicle body side and the front end side of the suspension member, the internal conduit extends through the speed reducer through the suspension member, and the end of the internal conduit extends through the conduit of the partition member. Although it is provided so as to protrude from the partition member through the hole, the end of the internal conduit is fixed to the partition member from the outside of the partition member by fastening means, and the end of the internal conduit is easily It is fixed to the partition member.

The traveling device according to claim 2 is the traveling device according to claim 1, wherein an external thread is formed on an outer peripheral surface of the end portion of the internal conduit, and the fastening means includes a nut that is screwed with the external thread; And a fixing means for defining an installation position of the nut and preventing loosening of the nut.
As a result, the fixing position of the end portion of the internal conduit to the partition member can be easily adjusted, and the end portion of the internal conduit is easily fixed to the partition member with a simple configuration.

According to a third aspect of the present invention, there is provided the travel device according to the second aspect, wherein the nut is coaxial and the sleeve is integrally formed, while the pipe passage through hole is formed so that the sleeve can be inserted therethrough. An O-ring is fitted on the periphery of the rim.
As a result, the end position of the inner pipe line can be easily adjusted with a simple configuration while being able to easily adjust the fixing position of the end part of the inner pipe line to the partition member.

  According to a fourth aspect of the present invention, there is provided the traveling device according to the second or third aspect, wherein the fixing means is integrally or separately provided on the partition member, and a screw hole for screwing a bolt is formed on the top surface. A projecting portion, a bolt through hole extending from the projecting portion toward the nut, passing through the threaded portion of the bolt at one end, and an end through hole penetrating the end portion of the internal conduit at the other end And inserting the end into the end through hole, and screwing the bolt into the screw hole through the bolt through hole to fix one end of the plate member to the convex portion. The nut is installed at a position where the head of the nut comes into contact with the plate member.

As a result, the end of the internal pipe line is easily and reliably fixed to the partition member with a simple configuration.
According to a fifth aspect of the present invention, the travel device according to any one of the second to fourth aspects is characterized in that the fastening means includes a lock nut that overlaps the nut and is screwed with the male screw.
As a result, loosening of the nut is reliably prevented, and the fixing position of the end portion of the internal pipe line to the partition member is ensured.

  A travel device according to a sixth aspect is the multi-stage planetary gear speed reducer according to any one of the first to fifth aspects, wherein the speed reducer is a multistage planetary gear speed reducer connected in the direction of the rotation axis of the wheel in the suspension member. The multi-stage planetary gear reducer is arranged so that the planetary gear is rotatably supported by the carrier fixed to the suspension member and the center of the sun gear is rotated. A hollow portion is formed by penetrating in the axial direction, and the internal pipe line extends to the partition member through the hollow portion of the sun gear.

  That is, when the center of the sun gear penetrates in the rotation axis direction to form a hollow portion, the internal pipe line can be disposed straight through the hollow part in the suspension member. It is possible to use a metal tube such as a steel pipe.

According to the traveling device of the first aspect, since the end portion of the internal conduit is fixed to the partition member from the outside of the partition member by the fastening means, the end portion of the internal conduit can be easily fixed to the partition member. The maintenance workability can be improved.
According to the traveling device of claim 2, the fixing position of the end portion of the internal pipe line to the partition member can be easily adjusted so that an excessive force is not applied to the internal pipe line. The part can be easily fixed to the partition member with a simple configuration.

According to the traveling device of claim 3, the end position of the inner conduit is easily adjustable and the end portion of the inner conduit is easily configured with a simple configuration to make the partition member liquid-tight. Can be fixed to.
According to the traveling device of the fourth aspect, it is possible to easily fix the end portion of the internal pipe line to the partition member with a simple configuration.

According to the traveling device of the fifth aspect, it is possible to reliably prevent the nut from loosening and to secure the fixing position of the end portion of the internal pipe line to the partition member over a long period of time.
According to the traveling device of the sixth aspect, it is possible to arrange the internal pipe straight through the hollow portion of the sun gear, and by using a metal tube such as a steel pipe as the internal pipe, Deterioration can be suppressed, and therefore the replacement frequency of the internal pipe line can be reduced, and the maintenance workability can be further improved.

Hereinafter, an embodiment of a traveling device according to the present invention will be described with reference to the drawings.
FIG. 1 is a schematic configuration diagram illustrating a dump truck traveling device according to the present invention. Hereinafter, the configuration of the travel device will be described with reference to FIG.
The traveling device 50 is roughly configured by an electric motor 1 that is a prime mover, a suspension member 51, a speed reducer 52, and a rotating member (wheel) 53. Specifically, the suspension member 51 is hollow and has a cylindrical shape, and the reduction gear 52 is embedded in the suspension member 51.

  The suspension member 51 is extended from the vehicle frame (vehicle body, not shown) of the dump truck for each drive wheel toward the outside in the vehicle width direction, and the spindle 9 is mainly fixed to the housing 8 with bolts 41. . Bearings 3 and 4 are disposed on the outer periphery of the spindle 9 to hold the rotating member 53 freely. Thus, the suspension member 51 is rotatably fitted around the spindle 9. It is configured.

The output shaft of the electric motor 1 is connected to the speed reducer 52 through the coupling 14 and the shaft 2 built in the suspension member 51.
The speed reducer 52 is generally composed of a first stage (previous stage) first planetary gear speed reducer 52A and a second stage (next stage) second planetary gear speed reducer 52B.
A carrier 11 that is a component part of the first planetary gear speed reducer 52A is fixed to the spindle 9 by a bolt 42, and a carrier 12 that is a component part of the second planetary gear speed reducer 52B is fixed by a bolt 43. Thus, the carriers 11 and 12 also function as a part of the suspension member 51 like the housing 8 and the spindle 9.

  The first planetary gear speed reducer 52A includes a sun gear 15 to which the tip of the shaft 2 is connected and a plurality of planetary gears rotatably supported by the carrier 11 fixed to the spindle 9 via pins 21 and bearings 23, respectively. 17 and a ring gear 19. Thus, the rotation of the electric motor 1 is transmitted from the sun gear 15 to the ring gear 19 via the planetary gear 17. At that time, the rotation of the electric motor 1 is decelerated in accordance with the gear ratio between the sun gear 15 and the ring gear 19, and torque is amplified and transmitted to the ring gear 19.

  The ring gear 19 is connected to the sun gear 16 of the second planetary gear speed reducer 52B via the gear coupling 25. Specifically, the ring gear 19 includes the ring gear 19, the sun gear 16, and the coupling 25 that are meshed with each other by splines, and the coupling 25 is fixed to the plate 26 fitted to the ring gear 19 with bolts 44, and the ring gear 19 is attached to the sun gear 16. 27 is fitted to the sun gear 16 so as to be able to rotate synchronously. More specifically, the sun gear 16 of the second planetary gear reducer 52B is hollowed in the center in the axial direction to form a hollow portion 16A, and is rotatably held by the carrier 12 via the bearing 28. Thus, the ring gear 19, the sun gear 16 and the coupling 25 are united so as to float within the suspension member 51 and are rotatable around the hollow portion 16A.

  In the second planetary gear speed reducer 52B, the sun gear 16, the plurality of planetary gears 18 rotatably supported by the carrier 12 fixed to the spindle 9 via the pins 22 and the bearings 24, and the ring gear 20, respectively mesh with each other. Thus, the rotating member 53 is connected to the ring gear 20. The rotating member 53 includes a wheel 5 and a pair of rims 6 and 6 that are coupled to the wheel 5 and externally fit a rubber tire 7. The ring gear 20 is fixed to the wheel 5 by a bolt 30.

Accordingly, the rotation transmitted from the ring gear 19 of the first planetary gear speed reducer 52 </ b> A to the sun gear 16 is further decelerated according to the gear ratio of the sun gear 16 and the ring gear 20 via the planetary gear 18. The torque is amplified and transmitted to the ring gear 20 and thus to the wheel 5.
Then, the tire 7 rotates through the rims 6 and 6 due to the output rotation of the electric motor 1 that is amplified and transmitted to the wheel 5 in this way, and the dump truck moves forward or in accordance with the output of the electric motor 1. Go backwards.

  The retainer 10 is fastened together with the bolt 41 so as to be sandwiched between the housing 8 and the spindle 9, while the retainer 13 is fixed to the wheel 5 with a bolt 47. The retainer 10 has a function of fixing the bearings 3 and 4 in the axial direction with an appropriate pressure, and also has a function of holding the floating seal 33, thereby preventing intrusion of foreign matters such as earth and sand into the inside of the apparatus. It is possible to maintain airtightness with the outside inside the apparatus. A shim 35 is interposed between the spindle 9 and the retainer 10, and the pressure applied to the bearings 3 and 4 can be adjusted by the shim 35.

  A bracket 29 is fastened together with a bolt 30 so as to sandwich the ring gear 20 between the wheel 5 and a retainer 38 is fixed to the carrier 12 with a bolt 48. The bracket 29 and the retainer 38 also have a function of holding the floating seal 34, thereby preventing foreign matter such as earth and sand from entering the inside of the apparatus and maintaining airtightness outside the inside of the apparatus as described above. is there.

  A brake disc 31 is integrally fixed to the bracket 29 by bolts 45, while a brake head 32 configured to operate the hydraulic piston by supplying pressure oil to the hydraulic cylinder is fixed to the carrier 12 by bolts 46. Has been. Although only one brake head 32 is shown in FIG. 1, in reality, the three brake heads 32 are evenly arranged in the circumferential direction.

Thus, by supplying and discharging pressure oil to and from the hydraulic cylinder to the brake head 32, the disk 31 is gripped or released, and the braking and driving of the rotating member 53 and thus the tire 7 can be controlled. .
A cover (partition member) 71 is provided on the distal end side (the side away from the vehicle body) of the suspension member 51 so as to block the internal space of the speed reducer 52 in a liquid-tight manner. Thereby, it is also possible to prevent foreign matter such as earth and sand from entering the inside of the apparatus and to maintain airtightness with the outside inside the apparatus.

Similarly, a cover (partition member) 81 is provided on the vehicle frame side (vehicle body side) of the suspension member 51 so as to be liquid-tightly closed. As a result, it is possible to prevent foreign matter from entering the inside of the apparatus and maintain airtightness with the outside inside the apparatus.
In the suspension member 51, a hydraulic pipe (inner pipe) 60 through which brake oil flows and a hydraulic pipe (internal pipe) 62 through which lubricating oil flows are connected to the carrier 11 and the sun gear 16 from the cover 81 side. It extends toward the cover 71 via the hollow portion 16A. Specifically, both the hydraulic pipe line 60 and the hydraulic pipe line 62 are made of steel pipes, and both end portions thereof penetrate the cover 71 and the cover 81 and protrude to the outside. It is fixed to the cover 81.

A brake hose (external pipe line) 36 for supplying and discharging pressure oil to and from the brake head 32 is connected to an end portion of the hydraulic pipe line 60 protruding from the cover 71, and protrudes from the cover 71 of the hydraulic pipe line 62. A greasing hose (external pipe line) 37 that feeds lubricating oil to the planetary gear 18 or the like is connected to the end portion.
On the other hand, a brake hose (external conduit) 84 connected to a brake hydraulic pressure source is connected to an end portion that protrudes from the cover 81 of the hydraulic line 60, and an end portion that protrudes from the cover 81 of the hydraulic line 62. Is connected to a greasing hose (external pipe line) 88 connected to a lubricating oil source.

FIG. 2 shows an enlarged view of an end portion protruding from the cover 71 of the hydraulic pipe line 60. Hereinafter, a configuration for attaching the end part of the hydraulic pipe line 60 to the cover 71 according to the present invention based on the same figure. Will be described.
A male screw 60A for connecting the brake hose 36 is engraved at an end portion of the hydraulic pipe line 60 projecting outside from the cover 71, and an outer diameter of the end portion is larger than the outer diameter of the male screw 60A. A male screw 60B is engraved.

On the other hand, the cover 71 is provided with a through hole (pipe through hole) 71A having a diameter larger than the outer diameter of the male screw 60B, and a groove 71B for the O-ring 78 is provided at the periphery of the through hole 71A. ing.
The male screw 60 </ b> B has a female screw 74 </ b> A corresponding to the male screw 60 </ b> B, and a nut 74 formed by extending a sleeve 74 </ b> B having a shaft diameter corresponding to the inner periphery of the O-ring 78. The sleeve 74B is screwed into the through hole 71A from the through hole (fastening means).

The cover 71 has a projection 71D having a flat surface 71C formed on the top surface, and a screw hole 71E in which a female screw capable of being screwed with a bolt 49 is formed in the flat surface 71C.
A plate (plate member) 73 is passed between the convex portion 71 </ b> D and the end surface 74 </ b> C of the nut 74. A through hole (bolt through hole) 73A through which the bolt 49 passes is drilled at one end of the plate 73, and a through hole (end through hole) 73B through the end of the hydraulic pipe line 60 is drilled at the other end. The bolts 49 are screwed into the screw holes 71E via the through holes 73A and the washers 72, whereby one end of the plate 73 is fixed to the convex portion 71D. In this state, the tightening amount of the nut 74 is adjusted so that the end surface 74 </ b> C of the nut 74 contacts the plate 73. A lock nut 75 is screwed onto the male screw 60B of the hydraulic line 60 with the plate 73 interposed therebetween. As a result, the hydraulic pipeline 60 is fixed to the plate 73, and the hydraulic pipeline 60 does not sway in the front-rear direction even when vibration occurs in the vehicle body. Further, the end of the hydraulic pipeline 60 is connected to the sleeve 74B and the O-ring. It is liquid-tightly fixed to the cover 71 via 78 (fixing means, fastening means).

The position of the flat surface 71C of the convex portion 71D is set closer to the male screw 60A when viewed in the axial direction than the end surface 74C of the sleeve 74B so that the sleeve 74B can be fitted to the through hole 71A of the cover 71 at any position in the axial direction. Has been.
Here, the case where the hydraulic line 60 is joined to the cover 71 has been described, but the case where the hydraulic line 62 through which the lubricating oil flows is joined to the cover 71 is exactly the same, and the description thereof is omitted here. In this case, male screws 62A and 62B are engraved in the hydraulic pipe line 62 corresponding to the male screws 60A and 60B.

FIG. 3 shows an enlarged view of an end portion protruding from the cover 81 of the hydraulic pipe line 60. Hereinafter, a configuration for attaching the end part of the hydraulic pipe line 60 to the cover 81 according to the present invention based on the same figure. Will be described.
A male screw 60C for connecting the brake hose 86 is engraved at an end portion of the hydraulic pipe line 60 that protrudes from the cover 81, and an outer diameter of the end portion is larger than the outer diameter of the male screw 60C. A male screw 60D is engraved.

On the other hand, the cover 81 is provided with a through hole (pipe passage through hole) 81A having a diameter larger than the outer diameter of the male screw 60D, and a groove 81B for the O-ring 88 is provided at the periphery of the through hole 81A. ing.
The male screw 60 </ b> D has a female screw 84 </ b> A corresponding to the male screw 60 </ b> D engraved, and a nut 84 formed by extending a sleeve 84 </ b> B having a shaft diameter corresponding to the inner periphery of the O-ring 88. The sleeve 84B is inserted into the through hole 81A through the screw hole (fastening means).

The cover 81 is provided with a convex member 81D having a flat surface 81C formed on the top surface. The flat surface 81C is provided with a screw hole 81E in which an internal thread capable of being screwed with a bolt 49 is formed.
A plate (plate member) 83 is passed between the convex member 81D and the end face 84C of the nut 84. A through hole (bolt through hole) 83A through which the bolt 49 passes is drilled at one end of the plate 83, and a through hole (end through hole) 83B through the end of the hydraulic pipe line 60 is drilled at the other end. The bolts 49 are screwed into the screw holes 81E through the through holes 83A and the washers 82, whereby one end of the plate 83 is fixed to the convex member 81D. In this state, the tightening amount of the nut 84 is adjusted so that the end face 84 </ b> C of the nut 84 contacts the plate 83. A lock nut 85 is screwed onto the male screw 60D of the hydraulic line 60 with the plate 83 interposed therebetween. As a result, the hydraulic pipeline 60 is fixed to the plate 83, and the hydraulic pipeline 60 does not shake in the front-rear direction even when vibrations occur in the vehicle body. Further, the end of the hydraulic pipeline 60 is connected to the sleeve 84B and the O-ring. It is liquid-tightly fixed to the cover 81 via 88 (fixing means, fastening means).

Note that the position of the flat surface 81C of the convex member 81D is set closer to the male screw 60C when viewed in the axial direction than the end face 84C of the sleeve 84B so that the sleeve 84B can be fitted to the through hole 81A of the cover 81 at any position in the axial direction. Has been.
Here, the case where the hydraulic line 60 is joined to the cover 81 has been described, but the case where the hydraulic line 62 is joined to the cover 81 is the same as described above, and the description thereof is omitted here. In this case, male screws 62C and 62D are engraved in the hydraulic line 62 corresponding to the male screws 60C and 60D.

As described above, in the traveling device according to the present invention, the hydraulic pipe 60 through which the brake oil is circulated and the hydraulic pipe 62 through which the lubricating oil is circulated are arranged inside the suspension member 51, and these hydraulic pipes 60, 62. The ends protruding from the covers 71 and 81 are fixed to the covers 71 and 81 from the outside of the covers 71 and 81.
Therefore, the end portions of the hydraulic lines 60 and 62 can be easily fixed to the covers 71 and 81 from the outside, and the maintenance workability can be improved.

Further, male screws 60B and 60D and male screws 62B and 62D are engraved at the respective ends of the hydraulic pipes 60 and 62, and nuts 74 and 84 are screwed into these, and the respective ends of the hydraulic pipes 60 and 62 are engaged. Is fixed to the covers 71 and 81.
Accordingly, the fixing positions of the end portions of the hydraulic pipes 60 and 62 to the covers 71 and 81 can be easily adjusted, so that excessive force is not applied to the hydraulic pipes 60 and 62, and the hydraulic pipes 60 and 62 can be prevented. It is possible to easily fix the cover to the covers 71 and 81 with a simple structure.

  Further, the sleeves 74B and 84B are extended from the nuts 74 and 84 to be screwed into the male screws 60B and 60D and the male screws 62B and 62D, while the O-ring 78 and the peripheral edges of the through holes 71A and 81A of the covers 71 and 81 are provided. Since the sleeves 74B and 84B are inserted into the through holes 71A and 81A, the ends of the hydraulic lines 60 and 62 can be easily fixed with a simple configuration and fixed to the covers 71 and 81 in a liquid-tight manner. can do.

Further, the hydraulic lines 60 and 62 can be fixed to the covers 71 and 81 by sandwiching the plates 73 and 83 and tightening the nuts 74 and 84 and the lock nuts 75 and 85. Thereby, the slack of the nuts 74 and 84 can be reliably prevented, and the fixing positions of the end portions of the hydraulic pipes 60 and 62 to the covers 71 and 81 can be ensured for a long period of time.
Further, here, the first planetary gear speed reducer 52A and the second planetary gear speed reducer 52B are connected as the speed reducer, and the center of the sun gear 16 of the second (next stage) second planetary gear speed reducer 52B is hollow. A portion 16A is formed, and hydraulic lines 60 and 62 are passed through the hollow portion 16A toward the cover 71.

  Accordingly, the hydraulic lines 60 and 62 can be disposed straight through the hollow portion 16A of the sun gear 16, and a metal tube such as a steel pipe is used as the hydraulic lines 60 and 62 as in this embodiment. Is possible. As a result, the deterioration of the hydraulic lines 60 and 62 can be suppressed as compared with the case where a rubber hose or the like is used. Therefore, the replacement frequency of the hydraulic lines 60 and 62 can be reduced, and the maintenance workability can be further improved. be able to.

This is the end of the description of the embodiment of the present invention, but the embodiment is not limited to the above.
For example, in the above-described embodiment, the hydraulic pipe 60 through which the brake oil is circulated and the hydraulic pipe 62 through which the lubricating oil is circulated are disposed inside the suspension member 51, and the end portions of the hydraulic pipes 60, 62 are connected to each other. The case of fixing to the covers 71 and 81 has been described as an example, but either one of the hydraulic pipes 60 and 62 may be provided, and when the cover 81 is not provided, the present invention is applied only to the cover 71. It is also possible to do.

Further, in the above embodiment, the planetary gear speed reducer 52 is constituted by two stages of the first planetary gear speed reducer 52A and the second planetary gear speed reducer 52B. It is not limited to three or more stages. In this case, a hollow portion may be formed in the second and subsequent sun gears, and the hydraulic lines 60 and 62 may be passed through the hollow portion.
Moreover, although the said embodiment demonstrated the traveling apparatus of the dump truck as an example, if it has the same traveling apparatus, a vehicle will not be limited to a dump truck.

It is a schematic block diagram which shows the traveling apparatus of the dump truck which concerns on this invention. It is an enlarged view showing the end which protrudes from the cover of the side away from the body among hydraulic lines, and is a figure explaining the composition of the present invention. It is an enlarged view which shows the edge part which protruded from the cover by the side of a vehicle body among hydraulic lines, Comprising: It is a figure explaining the structure of this invention. It is a figure which shows the prior art which joins a hose to a cover. It is a figure which shows the prior art using a rubber bush.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Electric motor 5 Wheel 7 Tire 16 Sun gear 16A Hollow part 50 Traveling apparatus 51 Suspension member 52 Reducer 52A 1st planetary gear reducer (front stage)
52B Second planetary gear reducer (next stage)
53 Rotating member (wheel)
60, 62 Hydraulic pipeline (internal pipeline)
60B, 62B Male thread 71, 81 Cover 71A, 81A Through hole 71D Convex part (fixing means, fastening means)
73,83 plate (fixing means, fastening means)
74,84 Nut (fastening means)
74B, 84B Sleeve 75, 85 Lock nut 78, 88 O-ring 81D Convex member (fixing means, fastening means)

Claims (6)

A hollow suspension member that extends to the vehicle body and that rotatably fits the wheel portion of the wheel, and a reduction gear that is embedded in the suspension member and that can amplify the output of the prime mover and transmit it to the wheel In the traveling device,
A partition member that partitions the space in the suspension member at at least one end on the vehicle body side and the side away from the vehicle body of the suspension member;
An end portion that extends through the suspension member through the speed reducer and is connected to an external pipe line is provided so as to protrude from the partition member through a pipe through hole of the partition member. An internal conduit through which oil circulates;
Fastening means for fixing the end of the internal pipe line to the partition member from the outside of the partition member;
A travel device comprising: A male screw is formed on the outer peripheral surface of the end portion of the internal conduit,
The traveling device according to claim 1, wherein the fastening means includes a nut screwed with the male screw, and a fixing means for defining an installation position of the nut and preventing loosening of the nut.   The nut is coaxial and has a sleeve integrally, while the pipe through-hole is formed so that the sleeve can be inserted, and an O-ring is fitted in the periphery of the pipe through-hole. The traveling device according to claim 2. The fixing means includes
A projecting portion that is integrally or separately projecting from the partition member and has a screw hole that is screwed into the top surface of the bolt, and extends from the projecting portion toward the nut, and the threaded portion of the bolt at one end And a plate member having an end through hole that penetrates the end of the internal pipe at the other end.
While inserting the end into the end through hole, the bolt is screwed into the screw hole through the bolt through hole to fix one end of the plate member to the convex portion, and the nut is attached to the nut. The traveling device according to claim 2, wherein the traveling device is installed at a position where the head abuts against the plate member.   The travel device according to any one of claims 2 to 4, wherein the fastening means includes a lock nut that is overlapped with the nut and screwed with the male screw. The speed reducer is a multistage planetary gear speed reducer connected in the direction of the rotation axis of the wheel in the suspension member, and is arranged so that the next stage is separated from the prime mover than the previous stage,
The multi-stage planetary gear speed reducer is supported so that the planetary gear can rotate on the carrier fixed to the suspension member, and the center of the sun gear penetrates in the rotation axis direction to form a hollow portion,
The traveling device according to claim 1, wherein the internal pipe line extends to the partition member through the hollow portion of the sun gear.

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