JP4698455B2 - Front structure of work vehicle - Google Patents

Description

  The present invention relates to a front structure of a work vehicle such as a tractor or a TLB (tractor / loader / backhoe).

  A work vehicle such as a tractor or TLB has an engine room covered with a bonnet on the front side of the engine mounted on the vehicle body, and a suction-type radiator is arranged in the engine room, on the front side of the radiator. Engine accessories such as batteries and oil coolers are deployed. As this type of work vehicle, there is known a work vehicle in which a battery base is installed on a front axle frame, and a battery is attached and supported on the battery base via a hook bolt or the like.

Also, a tractor front structure is known in which a cooler mounting portion is erected on a battery stand and an oil cooler is assembled in a vertical posture on the cooler mounting portion (see Patent Document 1).
JP 2002-219950 A

  However, according to the front structure of the tractor, when the upper cover forming the top plate of the bonnet is pivotally supported so as to be freely opened and closed, the locking means for locking the upper cover in a closed state is provided as a separate structure in the engine room. In this case, in addition to mounting the battery and the oil cooler, the lock means must be assembled in the engine room, and the assembling efficiency on the production line is very poor.

  Accordingly, the present invention provides a front structure of a work vehicle that can constitute an assembly (assembly) in which a battery, other engine accessories, and locking means are centrally arranged to improve work efficiency in a production line. The purpose is to provide.

In order to achieve the above object, the present invention takes the following technical means.
That is, the feature for solving the problem in the present invention is that, first, a radiator 34 in front of the engine 6 and a frame 50 in front of the radiator 34 are arranged on the front axle frame 11 protruding forward from the engine 6. The battery 35 and other engine accessories 36 and 37 are supported by the frame 50, and the bonnet 40 covering the radiator 34 and the frame 50 is supported by the front grill 41, the pair of left and right side covers 42, and the rear part. In the front structure of the work vehicle formed with the upper cover 43,
The frame 50 includes a base plate 51 that is supported by the front axle frame 11 and on which the battery 35 is placed, and a support body 52 that is erected on the base plate 51, and the base plate 51 and the support body 52. A battery fixing means 63 for fixing the battery 35 is provided between them, and a locking means 75 for locking the front portion of the upper cover 43 in a closed state is provided on the upper portion of the support body 52.
The locking means 75 is supported by the frame 50 in the vicinity of the upper end of the front grill 41 and a receiving bracket 76 that is disposed on the support 52 and receives a locking pin 47 attached to the front portion of the upper cover 43. In addition, the locking member 77 that engages with the locking pin 47 of the upper cover 43 and restricts the upward movement, and extends from the locking member 77 to the lower side of the frame 50 and the locking of the locking member 77 and the upper cover 43 from the lower side of the frame 50 A releasable unlocking lever 78 ;
The lock release lever 78 is pivoted downward so that the lock member 77 and the upper cover 43 are unlocked so that the upper end portion is pivotally connected to the lock member 77 and the lower end portion is positioned below the frame 50. and characterized in that it.

Second, before Symbol support 52 is deployed across the battery 35 on the base plate 51, after which the oil cooler 36 at the top and is supported, a grill attachment portion 82 for attaching the upper portion of the front grill 41, A side cover attaching portion 83 for attaching a front portion of the pair of left and right side covers 42;
The lock member 77 is disposed at a substantially central position in the left-right direction,
The unlocking lever 78 has a midway portion that curves outwardly to the left and right sides when viewed from the front, extends downward on the one side of the battery 35, and a lower end portion that passes through the one side of the base plate 51. It is characterized by that.

Further, according to the technical means of the present invention, a radiator 34 in front of the engine 6 and a frame 50 in front of the radiator 34 are arranged on the front axle frame 11 protruding forward from the engine 6. A battery 35 and other engine accessories 36 and 37 are supported, a bonnet 40 covering the radiator 34 and the frame 50 has a front grille 41, a pair of left and right side covers 42, and an upper cover 43 pivotally supported at the rear part. In the front structure of the work vehicle formed as
The frame 50 includes a base plate 51 that is supported by the front axle frame 11 and on which the battery 35 is placed, and a support body 52 that is erected on the base plate 51, and the base plate 51 and the support body 52. A battery fixing means 63 for fixing the battery 35 is provided between the upper support 43 and a lock means 75 for locking the front portion of the upper cover 43 in a closed state. Yes.

According to this, the battery 35 is supported between the base plate 51 and the support body 52, and another engine accessory is provided on the support body 52 erected on the base plate 51. of will be locking means 75 is deployed in the upper, these battery 35, the other engine accessory and locking means 75 of the assembly centered deployed in the frame 50 (assembly) is constituted, to those of the front axle frame 11 above Can be attached and detached easily and quickly.

Moreover, it is preferable that the said support body 52 is provided ranging over the battery 35 on the baseplate 51, and the oil cooler 36 is supported by the upper part after that.
According to this, the space between the battery 35 and the radiator 34 can be narrowed, and the space covered by the bonnet 40 can be saved or the space can be downsized.

The support 52 is preferably formed with a grill attachment portion 82 for attaching the upper portion of the front grill 41 and a side cover attachment portion 83 for attaching the front portions of the pair of left and right side covers 42.
According to this, the front grill 41 and the pair of left and right side covers 42 can be easily attached and detached. Further, the front grill 41 and the pair of left and right side covers 42 can be removed while maintaining the state in which the frame 50 is disposed on the front axle frame 11, whereby the battery 35 and other engine accessories can be removed from the front axle frame. 11 can be exposed in a state where it is positioned on the apparatus 11, which makes it convenient to perform maintenance and inspection work on these devices.

  According to the front structure of the work vehicle of the present invention, it is possible to configure an assembly (assembly) in which a battery, other engine auxiliary machines, and locking means are centrally arranged to improve work efficiency in the production line. it can.

Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings.
As shown in FIG. 12, reference numeral 1 denotes a work machine called TLB, and the work machine 1 is configured by mounting a front loader 3 on the front part of the tractor 2 and a backhoe 4 on the rear part.
A vehicle body (traveling vehicle body) 5 of the tractor 2 includes a front axle frame 11, an engine 6 that supports the front axle frame 11 so as to protrude forward, a housing 7 disposed at a rear portion of the engine 6, A transmission case 8 connected on the rear side is provided. The vehicle body 5 is supported by a pair of left and right front wheels 9 and a rear wheel 10 so as to be able to travel.

A driver's seat 12 is provided at the rear part of the vehicle body 5, and the driver's seat 12 is supported in a posture-changeable manner such as a forward-facing posture for operating the tractor 2 and the front loader 3 and a backward-facing posture for operating the backhoe 4. Between the driver's seat 12 and the engine 6, a tractor control unit 14 including a steering handle 13 is provided.
A work machine mounting frame 16 for mounting the front loader 3 and the backhoe 4 to the tractor 2 is provided at the lower part of the vehicle body 5. The front loader 3 is supported on the front side of the work implement mounting frame 16, and the backhoe 4 is supported on the rear side of the work implement mounting frame 16.

  The backhoe 4 includes a base 24 that is detachably attached to the rear part of the left and right work implement mounting frames 16, a swing bracket 25 that is supported by the base 24 so as to be swingable to the left and right, and a vertical swing that is supported by the swing bracket 25. A boom 26 that is freely supported, an arm 27 that is supported by the boom 26 so as to swing up and down, and a bucket 28 that is pivotally connected to the arm 27 so as to be pivotable. The swing bracket 25, the boom 26, the arm 27, and the bucket 28 can be swung by a hydraulic cylinder provided between them.

The front loader 3 includes a pair of left and right masts 30 fixed to the front portion of the work implement mounting frame 16, a boom 31 detachably attached to the mast 30, and a bucket 32 pivotally connected to the boom 31. And have. The boom 31 and the bucket 32 can be swung by a hydraulic cylinder provided between them.
The upper part of the front axle frame 11 is covered with a bonnet 40, whereby an engine room R covered with the bonnet 40 and the front axle frame 11 is formed at the front part of the tractor 2.

As shown in FIG. 5, the engine 6 is accommodated in the engine room R, and a radiator 34 and other engine accessories are arranged in the front part of the engine 6.
The radiator 34 is provided with a radiator fan at the back and employs a suction type that takes in air from the front side and sends cooling air to the rear engine 6.
As shown in FIGS. 1 and 5 to 7, an engine auxiliary device including a battery 35, an oil cooler 36, and a reserve tank 37 is disposed in a front portion of the radiator 34 while being supported by a frame 50. Yes.

As shown in FIGS. 2 to 4, the frame 50 includes a base plate 51 supported by the front axle frame 11 and a support body 52 erected on the base plate 51.
The base plate 51 includes a bottom plate portion 54 having a front end portion formed in a convex arc shape, a rising portion 55 that rises at a substantially right angle from the rear end portion of the bottom plate portion 54, and a substantially right angle from the upper end portion of the rising portion 55. And an upper plate portion 56 extending in a direction opposite to the bottom plate portion 54. As shown in FIGS. 1 and 5, a step is formed at the upper end portion of the front axle frame 11 with the front end portion being lower than the rear end portion, and the bottom plate portion 54 is a protruding piece at a position lower than the step portion. It is supported by a pair of left and right front axle frame 11 through 54a. Further, the upper plate portion 56 is connected to the lower end portion of the radiator 34 via a seal member, whereby the upper plate portion 56 functions as a shutter plate.

Further, as shown in FIGS. 3 and 4, a pair of left and right brace members 57 are attached between the rising portion 55 and the upper plate portion 56, thereby preventing the bending of the rising portion 55 and local seat shoes. ing.
As shown in FIG. 2, the support body 52 includes a pair of left and right columns 59 erected on the bottom plate portion 54 of the base plate 51, and an intermediate coupling member 60 that couples the midway portion in the vertical direction of the pair of left and right columns 59. And a beam member 61 for connecting the upper ends of the pair of left and right columns 59.

The pair of left and right support columns 59 are formed in a plate shape, and are fixed to the base plate 51 by welding or the like with the plate surfaces facing each other. Further, as shown in FIG. 4, the small edge surface on the rear end side of the lower end of the pair of left and right support columns 59 is in contact with the rising portion 55 of the base plate 51, thereby reinforcing the rising portion 55.
As shown in FIG. 2, the intermediate connecting member 60 is formed in a plate shape, and is disposed across a pair of left and right columns 59.

The beam member 61 is formed in an angled shape with an L-shaped cross section, and is fixed to the pair of left and right columns 59 in a state where the beam member 61 is in contact with the upper end of the pair of left and right columns 59 and the front end side of the upper end. The left and right end portions of the beam member 61 protrude outward from the pair of left and right columns 59.
As shown in FIGS. 1, 6, and 7, the battery 35 is placed on the base plate 51 at a position between the pair of left and right support columns 59 of the support body 52. It faces the support post 59 with a slight gap. Further, the lower end portion of the back surface of the battery 35 is opposed to the rising portion 55 of the base plate 51 with a slight gap. As a result, the battery 35 and the radiator 34 are arranged close to each other.

  The battery 35 is attached to and supported by the base plate 51 and the support body 52 via the battery support means 63. As shown in FIGS. 1 and 6, the battery support means 63 includes a fixture 64 that extends in the vertical direction at a position in front of the battery 35 and that is the center of the battery 35 in the left-right direction, and a pair of left and right fixtures 64. Formed on a pair of left and right struts 59 to support the connecting tool 65, a support piece 66 that connects the fixing tool 64 and the bottom plate portion 54 of the base plate 51, and a connecting tool 65 disposed between the support pillars 59. The support part 67 is provided.

The fixture 64 is formed of a bar, and a lower end portion is bent in a hook shape, and an upper end portion is formed so that a wing nut 64a can be screwed together.
The connecting tool 65 is formed by bending a bar, and includes a pair of left and right leg portions 68 and a connecting portion 69 that connects the leg portions 68. The distal end portions of the pair of left and right leg portions 68 are pivotally supported by the support portion 67 of the support column 59 in a detachable manner. The connecting portion 69 includes a seat portion 69a that abuts on the upper surface of the battery 35, and has a bent portion 69b that bends 180 degrees. When the tip of the leg portion 68 is supported by the support portion 67, the bent portion 69b. Protrudes toward the front of the battery 35.

The support piece 66 is erected on the bottom plate portion 54 of the base plate 51, and a hole 66 a through which the lower end portion of the fixture 64 can be hooked is formed.
In order to support the battery 35 by the battery support means 63, the lower end portion of the fixture 64 is hooked in the hole 66 a of the support piece 66 and the upper end portion of the fixture 64 is inserted through the bent portion 69 b of the connector 65. It protrudes above the connector 65. Then, the wing nut 64 a is screwed into the upper end portion of the fixture 64. As a result, the battery 35 is sandwiched and supported by the seat 69 a of the connector 65 and the bottom plate 54 of the base plate 51.

As shown in FIG. 7, the reserve tank 37 is disposed on one side of the battery 35 (on the left side in the present embodiment) and supported by the left column 59 via the bracket 71.
As shown in FIG. 6, the oil cooler 36 includes a fin-type core, and the core is connected by a pipe joint. As a result, the oil cooler 36 has no risk of oil leaking from the joint portion even when the back pressure becomes high.

  The oil cooler 36 is supported at the lower end of the core on the back surface of the intermediate connecting member 60 of the support body 52 via the bracket 72. Accordingly, the oil cooler 36 is supported by the frame 50 in a state of being positioned above the battery 35, and the core is exposed from between the intermediate coupling member 60 and the beam member 61 of the support body 52 in a front view. . Further, the oil cooler 36 is provided in a narrow space between the radiator 34 and the battery 35, so that the engine room R can be saved in space. Further, the height position of the upper end portion of the frame 50 is set lower than the height position of the upper end portion of the radiator 34, whereby the height of the front portion of the engine room R is configured as low as possible.

Further, as shown in FIGS. 6 to 8, a horn 38 is supported on the beam member 61 of the frame 50 via a bracket 73.
As shown in FIG. 5, the bonnet 40 forms a front grill 41 that forms the front wall of the engine room R, a pair of left and right side covers 42 that form the left and right walls of the engine room R, and a top plate of the engine room R. And an upper cover 43.

As shown in FIGS. 5, 7, and 8, the front grill 41 is formed in a convex arc shape facing both sides and the front of the frame 50, a grill portion 41 a facing the entire surface of the battery 35, and the grill And a frame portion 41b surrounding the portion 41a.
As shown in FIG. 5, the side cover 42 is provided from the rear of the frame 50 to the side of the engine 6, and a grill portion 42 a provided at a position between the radiator 34 and the engine 6, and the grill And a cover portion 42b surrounding the portion 42a. The upper edge portion of the cover portion 42b is smoothly connected to the rear end portion of the front grill 41, and is curved in a convex arc shape with the front end portion being lower than the rear end portion. Further, the rear end portions of the pair of left and right side covers 42 are opposed to the center pillar 44.

  The upper cover 43 is formed in an inverted hook shape that can face the front grille 41 and the upper edge portions of the pair of left and right side covers 42. The rear end of the upper cover 43 is connected to the center pillar 44 via a hinge mechanism 45 having an axial center in the left-right direction. As a result, the upper cover 43 has a closed state in which the lower edge is brought into contact with the upper edges of the front grill 41 and the pair of left and right side covers 42 to cover the radiator 34, the frame 50, and the other engine accessories. The edge is separated from the upper edge of the front grill 41 and the pair of left and right side covers 42, and is swingable between the radiator 34, the frame 50, and an open state in which the other engine accessories are exposed.

Further, the upper cover 43 is formed in a front descending shape (slant nose shape) in which the front end portion is lower than the rear end portion in the closed position. As a result, the visibility of the driver seated in the driver's seat 12 to the front of the vehicle body 5 is secured, and the workability of the loader work is improved.
Further, as shown in FIG. 1, a support device 46 that supports opening and closing of the upper cover 43 is disposed at the front end portion of the upper cover 43 at a position facing the frame 50 in the closed state.

The support device 46 includes a locking pin 47 for locking the upper cover 43 in a closed state, and an upper edge portion of the front grill 41 at the front end portion of the upper cover 43 when the locking state of the locking pin 47 is released. And a pair of left and right urging tools 48 separated from each other.
The locking pin 47 is provided at the center in the left-right direction of the upper cover 43 and is attached to the upper cover 43 via a bracket.

The pair of left and right urging tools 48 are provided on both left and right sides of the locking pin 47, and a spring member 48a provided on the upper cover 43 via a bracket, and a contact member provided on the tip of the spring member 48a. 48b.
When the upper cover 43 is closed, the abutting members 48 b of the respective urging tools 48 of the support device 46 abut on the upper surface of the beam member 61 that is the upper end of the support body 52 of the frame 50. At this time, the lower edge portion of the upper cover 43 is opposed to the upper edge portion of the front grill 41 with a slight gap.

  When the upper cover 43 is further pushed in this state, the spring member 48a of each urging tool 48 contracts, and the locking pin 47 is locked in a state where the spring member 48a is contracted. The upper cover 43 is set in the closed state in a state where the spring member 48a of the urging tool 48 stores the elastic restoring force. For this reason, by releasing the locking state of the locking pin 47, the elastic restoring force of the spring member 48a of each biasing tool 48 is released, and thereby the upper cover 43 is separated from the front grill 41 vigorously. Thus, the gap is formed between the upper cover 43 and the front grille 41, and the upper cover 43 can be easily lifted by inserting a hand into the gap.

As described above, the frame 50 is provided with the locking means 75 for locking the locking pin 47 in order to lock the locking pin 47 of the upper cover 43.
The lock means 75 includes a receiving bracket 76 disposed on the support body 52 of the frame 50, a lock member 77, and a lock release lever 78.
The receiving bracket 76 is provided so as to protrude upward at a substantially central position in the left-right direction of the beam member 61 of the support body 52. Further, the receiving bracket 76 is provided with a receiving groove 76 a that receives the locking pin 47 provided on the upper cover 43.

Lock member 77 is supported front and rear JikuMawari linear swingably to receiving bracket 76, the lower end portion is pulled by the spring member 79 interposed between the beam member 61. This locking member 77 is urged by the spring member 79 to pivot in the direction of the arrow A in Ri longitudinal JikuMawari.
The lock member 77 has an inclined guide portion (cam surface) 77a inclined from the upper end toward the middle portion, and the lower end side of the inclined guide portion 77a is connected to a locking portion 77b formed in a notch shape. Has been. The locking portion 77 b engages with the locking pin 47 received in the receiving groove 76 a of the receiving bracket 76 from above, and restricts the upward movement of the locking pin 47 due to the elastic restoring force of the urging tool 48. . When the locking pin 47 is lowered toward the receiving bracket 76 together with the upper cover 43, the inclined guide portion 77a is locked by the downward contact of the locking pin 47 against the inclined guide portion 77a. the member 77 is swung in the direction of arrow B in Ri longitudinal JikuMawari against the spring member 79, for guiding the receiving groove 76a of the receiving the locking pin 47 the bracket 76.

  Further, the lock member 77 is provided with a notch recess 77c at a position opposite to the locking portion 77b, and a stopper 76b protruding from the receiving bracket 76 is inserted into the notch recess 77c. As a result, the rocking range of the lock member 77 is limited to a range in which the stopper 76b can relatively move in the notch recess 77c, and the locking portion 77b engages with the locking pin 47 in the receiving groove 76a from above. The locking member 77 is in a locked position (indicated by a solid line in FIG. 1) and an unlocking position (indicated by a two-dot chain line in FIG. 1) where the locking portion 77b is released to the left side from the locking pin 47 in the receiving groove 76a. It swings.

The unlocking lever 78 is made of a single round bar made of metal or the like, and has an upper end pivotally supported by the lock member 77 and a lower end formed on a base plate 51 of the frame 50. It is inserted through the notch and is located below the frame 50 (see FIG. 3). Further, a knob portion 80 that is circularly curved is formed at the lower end portion.
To release the locking state of the locking pin 47, the knob portion 80 is picked by hand (or hooked with a finger) and the lock release lever 78 is pulled downward. As a result, the lock member 77 swings against the urging force of the spring member 79, whereby the locking portion 77b swings and the locking state of the locking pin 47 is released.

  At this time, the locking pin 47 is moved upward by the elastic restoring force of the urging tool 48 and is detached from the receiving groove 76a. Thus, even when the unlocking lever 78 is released, the locking pin 47 is released. 47 will be located on the inclination guide part 77a of the lock member 77, and the latch release state will be maintained. Accordingly, the bonnet 40 can be opened upward even when the hand is released from the lock release lever 78.

As shown in FIGS. 2 to 4 and 7, the frame 50 is provided with a grill attachment portion 82 for attaching the front grille 41 and a side cover attachment portion 83 for attaching the front portions of the pair of left and right side covers 42. ing.
The grill attachment portion 82 includes a pair of left and right stays 84 extending forward at the left and right ends of the beam member 61 of the support 52 and a pair of left and right engagements formed on the bottom plate portion 54 of the base plate 51 of the frame 50. A joint hole 85 is provided. On the other hand, the front grille 41 is formed with a pair of left and right notches 41c at the upper end of the frame portion 41b and a pair of left and right convex portions 41d at the lower end.

  With this configuration, the pair of left and right cutouts 41c of the front grille 41 are supported by the pair of left and right stays 84 of the support body 52 via the connecting tool 86, and the pair of left and right projections of the front grille 41 are shown in FIG. The front grill 41 is attached to the front portion of the vehicle body 5 via the frame 50 as shown in FIG. 8 by engaging the engagement holes 85 formed in the left and right pairs of the bottom plate portion 54 of the frame 50 with the portion 41d. It will be.

Further, the side cover attachment portion 83 is formed at the left and right end edges of the beam member 61 of the support body 52. On the other hand, a stay 42c is extended at the front portion of the side cover 42, and the stay 42c is supported by the side cover attachment portion 83 via a fastener such as a bolt, whereby the pair of left and right side covers 42 is provided. It will be deployed on the front side of the vehicle body 5 via the frame 50.
Each side cover 42 is also supported by the center pillar 44 at the rear end via a fastener such as a bolt.

  According to the present embodiment, as shown in FIG. 9, the frame 50 supports the engine accessory including the battery 35, the oil cooler 36, and the reserve tank 37, and also supports the horn 38, the lock means 75, and the front grille 41. Has been. Therefore, an assembly for assembling these engine auxiliary machines 35 to 37, the horn 38, the locking means 75, and the front grille 41 in a concentrated manner on the frame 50 is constructed, and assembling work for deploying these on the front axle frame 11 Becomes simple. Thereby, not only the work efficiency in the production line is achieved, but also maintenance and inspection work and replacement work of these engine auxiliary machines 35 to 37, the horn 38, the lock means 75, and the front grille 41 can be easily performed.

  Further, since the lock means 75 is provided on the frame 50 and the lock means 75 is provided at a position slightly protruding from the front grille 41, the support device 46 is only provided at the front end portion of the upper cover 43. Thus, the upper cover 43 can be freely opened and closed, whereby the height of the front end of the upper cover 43 is made as low as possible. Therefore, in the TLB of the present embodiment, the front view of the driver 5 who is seated on the driver's seat 12 with the upper cover 43 having a front-falling shape set to a steep slope is maintained well. Further, the weight of the upper cover 43 can be reduced.

  Further, the upper end of the frame 50 including the horn 38, the lock means 75, and the stay 84 of the grill attaching portion 82 is set lower than the upper end of the radiator 34, so that the height of the front portion of the engine room R is increased. It is formed lower than the rear part. As a result, the slope of the front end portion of the upper cover 43 is formed to be particularly steep, and the visibility of the front portion of the tractor 2 is sufficiently secured.

In addition, the front grill 41 and the pair of left and right side covers 42 can be removed while the engine accessories 35 to 37 and the horn 38 are supported on the frame 50 , and maintenance inspection of these engine accessories 35 to 37 is also performed. Work can be performed easily.
Incidentally, as shown in FIG. 10, the power from the engine 6 transmitted to the transmission case 8 via the flywheel 90 and the propeller shaft 91 is also transmitted to the front wheels 9 via the front wheel drive mechanism 92 and the front axle case 93. The

The front wheel drive mechanism 92 includes a rear drive shaft 94, an intermediate coupling mechanism 95, a front drive shaft 96, and a bevel pinion shaft 97.
The intermediate coupling mechanism 95 includes a universal joint 99 supported by a lower end portion of the housing 7 via a bearing, and a joint cover 100 that covers the universal joint 99.

Further, the bevel pinion shaft 97 is supported by a front axle bearing 101 that is supported by the front axle frame 11 and receives the front axle case 93, and a tip portion of the bevel pinion shaft 97 is a differential mechanism of the front axle case 93. It is connected to the.
The rear drive shaft 94 is connected to the front wheel output shaft disposed in the transmission case 8 via the universal joint 102 at the rear end, and the front drive shaft 94 is connected to the front drive shaft via the universal joint 99 of the intermediate coupling mechanism 95. 96 is connected to the rear end.

Further, the front end portion of the front drive shaft 96 is opposed to the rear end portion of the bevel pinion shaft 97 with an interval S, and the front end portion of the front drive shaft 96 and the rear end portion of the bevel pinion shaft 97 are both The coupling 103 is spline-fitted. As a result, the front drive shaft 96 is connected to the bevel pinion shaft 97.
Further, the coupling 103 is provided with a spring pin 104 that contacts the front end of the front drive shaft 96 and a spring pin 104 that contacts the rear end of the bevel pinion shaft 97.

The front drive shaft 96 is covered by the first shaft cover 106 from the rear end portion to the midway portion in the front-rear direction. The front end portion of the first shaft cover 106, the front end portion of the front drive shaft 96, the coupling 103, and the bevel The rear end portion of the pinion shaft 97 is covered with the second shaft cover 107.
In addition, a hose clamp 108 is provided at a position where the first shaft cover 106 and the second shaft cover 107 overlap with each other, so that the shaft covers 106 and 107 are supported so as not to move in the axial direction. .

When replacing the front drive shaft 96, first, the hose clamp 108 is removed.
Next, as shown in FIG. 11A, the second shaft cover 107 is moved in the axial direction toward the intermediate coupling mechanism 95 to overlap the first shaft cover 106 and expose the coupling 103.

Next, as shown in FIG. 11 (b), the pair of spring pins 104 is removed, and the coupling 103 is moved in the axial direction toward the intermediate coupling mechanism 95 and overlapped with the front drive shaft 96. As a result, the front end portion of the front drive shaft 96 and the rear end portion of the bevel pinion shaft 97 are exposed with a space S therebetween.
By releasing the connection between the rear end portion of the front drive shaft 96 and the universal joint 99 of the intermediate connection mechanism 95 in this state, the front drive shaft 96 can move in the axial direction. Then, as shown in FIG. 11C, the rear end portion of the front drive shaft 96 is detached from the intermediate coupling mechanism 95 by moving the front drive shaft 96 in a direction to approach the bevel pinion shaft 97. As a result, the front drive shaft 96 is removed.

In other words, the distance S becomes a stroke for removing the front drive shaft 96, whereby the front drive shaft 96 can be removed without removing the front axle case 93, the front axle bearing 101, the intermediate coupling mechanism 95, etc. The drive shaft 96 can be easily replaced.
In the above-described embodiment, the front structure of the working machine as the TLB has been described. However, the present invention is not limited to the working machine as the TLB, and may be a tractor or a traveling vehicle other than the tractor.

It is a front view of an engine room. It is a front view of a frame. It is a top view of a frame. It is a left view of a frame. It is a left view of an engine room. It is a left view of the front of an engine room. It is a top view of the vehicle body front part which removes and shows a front grill and a side cover. It is a top view of an engine room. It is a left view which decomposes | disassembles and shows the structure of a vehicle body front part. It is a left view of the lower part of a vehicle body. It is a left view which shows the process of removing a front drive shaft. It is a left view of a working machine.

DESCRIPTION OF SYMBOLS 1 Work implement 2 Tractor 3 Front loader 4 Backhoe 6 Engine 11 Front axle frame 34 Radiator 35 Battery 36 Oil cooler 40 Bonnet 41 Front grill 42 Side cover 43 Upper cover 47 Locking pin 50 Frame 51 Base plate 52 Support body 63 Battery support means 75 Locking means 82 Grill attachment part 83 Side cover attachment part

Claims (2)

On the front axle frame (11) protruding forward from the engine (6), a radiator (34) in front of the engine (6) and a frame (50) in front of the radiator (34) are arranged, and the frame The battery (35) and other engine accessories (36, 37) are supported by (50), and the bonnet (40) covering the radiator (34) and the frame (50) is connected to the front grille (41) and a pair of left and right sides. In the front structure of the work vehicle formed by having a cover (42) and an upper cover (43) pivoted at the rear,
The frame (50) is supported by the front axle frame (11) and has a base plate (51) on which the battery (35) is placed, and a support body (52) erected on the base plate (51). Battery fixing means (63) for fixing the battery (35) between the base plate (51) and the support (52) is provided, and the battery (35) is closed at the top of the support (52). Locking means (75) for locking the front part of the upper cover (43) is provided,
The locking means (75) includes a receiving bracket (76) disposed on the support (52) and receiving a locking pin (47) attached to the front of the upper cover (43), and the front grill (41). A lock member (77) that is swingably supported by the frame (50) in the vicinity of the upper end and engages with a locking pin (47) of the upper cover (43) to restrict upward movement, and the lock member (77) And a lock release lever (78) capable of releasing the lock member (77) and the upper cover (43) from below the frame (50) from below the frame (50) .
The unlocking lever (78) is pivoted downward so that the locking member (77) and the upper cover (43) are unlocked so that the upper end is connected and pivotally supported by the locking member (77). The front part structure of the work vehicle, wherein the part is located below the frame (50) . The support body (52) is disposed across the battery (35) on the base plate (51), and then the oil cooler (36) is supported on the upper part thereof, and a grill for attaching the upper part of the front grille (41). An attachment portion (82) and a side cover attachment portion (83) for attaching the front portion of the pair of left and right side covers (42);
The lock member (77) is disposed at a substantially central position in the left-right direction,
The unlocking lever (78) has a middle portion that curves outwardly to the left and right sides in a front view and extends downward on the one side outward of the battery (35), and a lower end portion of the one of the base plate (51). The front part structure of the working vehicle according to claim 1, wherein the side part is inserted .

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