JP4975284B2 - Work vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a working vehicle having a fuel tank mounted as a unit to a cabin frame. <P>SOLUTION: A fuel tank unit 22 is mounted to the cabin frame 8 by mounting a subframe 20 of the fuel tank unit 22 wherein the fuel tank 19 is mounted to the subframe 20 to the cabin frame 8 mounted to a traveling machine body 3 in an anti-vibration state. A unit 33 of a steering handle 32 is mounted to the fuel tank unit 22, and the steering handle 32 is integrally provided with the fuel tank unit 22. <P>COPYRIGHT: (C)2007,JPO&amp;INPIT

Description

  The present invention relates to a work vehicle such as a tractor.

2. Description of the Related Art A work vehicle (a tractor) having a structure that includes a conventional cabin and a fuel tank and prevents the inconvenience that a fuel tank is attached to a cabin frame attached to a traveling machine body and the fuel tank vibrates due to engine vibrations to generate noise It is publicly known (see, for example, Patent Document 1).
Japanese Patent No. 3232129

  The tractor is directly attached to the cabin frame. For this reason, for example, when carrying out maintenance with the cabin frame removed, remove the cabin frame with the fuel tank side piping and harness attached, or remove the cabin frame after disconnecting the fuel tank side piping and harness beforehand. It is necessary to do. In other words, the cabin frame is not easy to remove and has a drawback of low maintainability.

A work vehicle according to the present invention for solving the above-described problems includes a cabin 4 and a fuel tank 19, the fuel tank 19 is attached to the cabin frame 8, and the cabin frame 8 is attached to the traveling machine body 3 in a vibration-proof state. In the vehicle, a subframe 20 to which a fuel tank 19 is attached is provided separately from the cabin frame 8, and the fuel tank 19 is attached to the subframe 20 to constitute a fuel tank unit 22, and the cabin frame 8 attaches the fuel tank 19. And a frame frame 21 provided on the subframe 20 is formed in a gate shape along the fuel tank mounting frame 13, and the fuel tank mounting frame 13 is a frame frame. 21. The subframe 20 is attached to the cabin frame 8 while being placed on the Accordingly, the fuel tank unit 22 is attached to the cabin frame 8, also by releasing the attachment of the sub-frame 20 and the cabin frame 8, remove the fuel tank unit 22 from the cabin frame 8, thereby the cabin frame 8 alone The first feature is that the structure can be removed from the traveling machine body 3 .

  Second, a steering mast 28 is provided in the fuel tank unit 22, and the steering handle 32 is integrally provided on the fuel tank unit 22 by attaching a unit 33 of the steering handle 32 to the steering mast 28. Yes.

  Thirdly, a soundproofing material 42 made of a resilient material is interposed between the subframe 20 and the cabin frame 8.

  Fourth, a clutch housing case 14 is disposed below a fuel tank unit 22 attached to the cabin frame 8, and the clutch housing case 14 and the subframe 20 or the cabin frame 8 are interposed between the clutch housing case 14 and the subframe 20. The space between the frame 20 or the cabin frame 8 is characterized by interposing cushion members 43 and 46 that close the gap between the clutch housing case 14 and the sub-frame 20 or the cabin frame 8 while allowing the gap variation. It is said.

  According to the structure of the present invention configured as described above, since the fuel tank unit is attached to the cabin frame that is attached to the traveling aircraft body in a vibration-proof state, vibration of the fuel tank unit is also prevented, and noise caused by vibration of the fuel tank is prevented. Occurrence can be prevented. Further, since the fuel tank is attached to the cabin frame as a fuel tank unit, the cabin frame and the fuel tank unit can be easily handled separately. Thereby, there is an effect that the maintainability and the assembling property are improved.

  In particular, by providing a steering mast in the fuel tank unit and attaching the steering handle unit to the steering mast, the steering handle unit can be easily handled integrally with the fuel tank unit. Therefore, vibration of the steering handle unit is prevented, and in addition to soundproofing, there is an advantage that the operability of the steering handle is improved.

  On the other hand, by inserting a soundproofing material made of a resilient material between the subframe and the cabin frame, the gap between the subframe and the cabin frame is filled with the soundproofing material, preventing noise from entering the cabin. The Further, the dimensional error of the subframe and the cabin frame can be absorbed by elastic deformation of the soundproof material, and there is an advantage that it is not necessary to extremely increase the processing accuracy and assembly accuracy of the parts.

  A clutch housing case is disposed below the fuel tank unit attached to the cabin frame, and a space between the clutch housing case and the sub frame or cabin frame is provided between the clutch housing case and the sub frame or cabin frame. By inserting a cushioning material that closes in a state in which a gap variation between the clutch housing case and the subframe or the cabin frame is allowed, the clutch housing case and the subframe or the cabin are caused by vibration or the like when the work vehicle is traveling. Even if the gap with the frame changes, the cushioning material expands elastically, and the gap between the clutch housing case and the subframe or cabin frame continues to be closed, preventing the occurrence of noise, etc., and the noise entering the cabin. Can prevent That.

  FIG. 1 is a perspective view of a tractor that is a work vehicle. The tractor includes a cabin 4 mounted on a traveling machine body 3 having a front wheel 1 and a rear wheel 2. In front of the cabin 4 is provided a bonnet 6 that houses the engine. A fuel filler port 7 is provided at a position immediately before the cabin 4 in the bonnet 6.

  FIG. 2 is a perspective view showing a frame (cabin frame) 8 of the cabin 4. The cabin frame 8 includes a front vertical frame 9 erected on the front left and right, a lower floor frame 11, a rear vertical frame 12 erected on the left and right rear, a gate-shaped fuel tank mounting frame 13 for mounting a fuel tank, and the like. It has. The fuel tongue mounting frame 13 is disposed between the left and right front vertical frames 9.

  The front side of the cabin frame 8 is attached and fixed to the clutch housing case 14 in a vibration-proof state via a vibration-proof material. The rear side of the cabin frame 8 is attached and fixed in a vibration-proof state to a rear axle case (not shown) via a vibration-proof material. The cabin frame 8 is attached to the traveling machine body 3 as described above.

  The clutch housing case 14 accommodates a clutch mechanism that transmits and disengages driving force from the engine to the transmission. As shown in FIG. 3, the clutch mechanism is operated by swinging of a clutch pedal 16 that protrudes from the floor frame 11 side so that it can be stepped on.

  The floor frame 11 is provided with a passage hole 17 through which the clutch housing case 14 passes while the cabin frame 8 is attached to the clutch housing case 14. The passage hole 17 is provided with a cover 18 (see FIG. 3) that covers the clutch housing case 14 from above. The cover 18 is integrally attached and fixed to the floor frame 11.

  As shown in FIG. 3, when the cabin frame 8 is attached to the clutch housing case 14, the front end portion of the clutch housing case 14 enters the lower position in the fuel tank attachment frame 13. The fuel tank mounting frame 13 also secures a mounting space for the clutch housing case 14.

  As shown in FIG. 4, the above-described fuel tank 19 is provided in a fuel tank unit 22 configured around a subframe 20 having a gate-like frame frame 21. The sub-frame 20 includes the frame frame 21 and plate-like frame plates 23 and 24 provided integrally with the frame frame 21 at the top and bottom in the frame frame 21.

  A notch 29 is formed below the frame plate 24 on the lower side. The notch 29 is open at the bottom where the clutch housing case 14 is fitted. A fuel tank 19 is fixed to the upper frame plate 23.

  The fuel tank 19 is disposed on the rear side of the subframe 20. The fuel filler 26 connected to the fuel tank 19 protrudes to the front side of the subframe 20. The tip of the oil supply portion 26 is the aforementioned oil supply port 7 and protrudes from the bonnet 6.

  An attachment frame 27 made of a plate bent in a step shape is integrally attached to the bottom surface of the fuel tank 19. A steering mast 28 is integrally attached and fixed to the inclined surface of the attachment frame 27.

  A steering unit (steering unit) 33 including a power steering unit 31 and a steering handle 32 is attached to the steering mast 28. The fuel tank unit 22 includes a steering unit 33, and a steering handle 32 is provided integrally with the fuel tank unit 22.

  Attachment portions 34L, 34R, 36, and 37 on the cabin frame 8 side are provided at the left and right ends of the frame frame 21, the upper end of the frame frame 21, and the rear end of the attachment frame 27, respectively.

  As shown in FIG. 5, receiving portions 38 </ b> L and 38 </ b> R corresponding to the attachment portions 34 </ b> L and 34 </ b> R at the left and right ends of the frame frame 21 are provided below the fuel tank mounting frame 13 in the cabin frame 8. A receiving portion 39 corresponding to the mounting portion 36 at the upper end of the frame frame 21 is provided above the fuel tongue mounting frame 13. The upper surface of the cover 18 of the cabin frame 8 constitutes a receiving portion 41 corresponding to the mounting portion 37 at the rear end of the mounting frame 27 (see FIG. 6).

  By attaching the mounting portions 34L, 34R, 36, 37 on the fuel tank unit 22 side and the receiving portions 38L, 38R, 39, 41 on the cabin frame 8 side to each other and fixing them to each other, the fuel tank unit is attached to the cabin frame 8. 22 is integrally attached and fixed.

  The attachment portions 34L, 34R at the left and right ends of the frame frame 21 are positioned inside the corresponding receiving portions 38L, 38R and are bolted. The attachment portion 36 at the upper end of the frame frame 21 is in bolt contact with the rear surface of the corresponding receiving portion 39. A mounting portion 37 at the rear end of the mounting frame 27 is in contact with the corresponding receiving portion 41 from above and fixed with bolts.

  When the fuel tank unit 22 is attached, the clutch housing case 14 is positioned below the fuel tank unit 22 in the fuel tank mounting frame 13 so as to fit into the notch 29 of the frame plate 24 (see FIG. 3).

  The frame frame 21 has a step-like cross section and has a gate shape along the fuel tongue mounting frame 13. When the frame frame 21 is attached to the fuel tongue mounting frame 13 as described above, the fuel tongue mounting frame 13 is placed on the upper surface of the lower step portion 21L of the frame frame 21.

  However, as shown in FIG. 6, a rubber plate 42 is attached to the lower step portion 21 </ b> L of the frame frame 21. For this reason, when attaching the fuel tongue mounting frame 13 and the sub-frame 20, the rubber plate 42 is inserted between the fuel tongue mounting frame 13 and the frame frame 21, and between the fuel tongue mounting frame 13 and the frame frame 21. In a state where the gap is filled with the rubber plate 42, the fuel tongue mounting frame 13 and the sub frame 20 are fixed.

  As shown in FIG. 6, a cushion 43 is provided in a portion facing the clutch housing case 14 in the notch 29 of the lower frame plate 24. When the cabin frame 8 to which the fuel tank unit 22 is attached is attached to the clutch housing case 14, the cushion is interposed between the clutch housing case 14 and the lower frame plate 24 (periphery of the notch portion 29). 43 is inserted. The cushion 43 fills a gap between the clutch housing case 14 and the lower frame plate 24.

  As shown in FIG. 7, the left and right covers 44 are provided behind the subframe 21 in the floor frame 11. The cover 44 is located on the front side of the clutch housing case 14 when the cabin frame 8 is attached to the clutch housing case 14. A cushion 46 is inserted between the clutch housing case 14 and the cover 44. The gap between the clutch housing case 14 and the cover 44 is filled by the cushion 46.

  The cushion 43 between the frame plate 24 and the clutch housing case 14 is elastically crushed between the clutch housing case 14 and the frame plate 24 and fills the gap between the clutch housing case 14 and the frame plate 24. The cushion 46 between the cover 44 and the clutch housing case 14 is elastically crushed between the cover 44 and the clutch housing case 14 to fill a gap between the clutch housing case 14 and the cover 44.

  Even if the gap between the frame plate 24 and the clutch housing case 14 or the gap between the cover 44 and the clutch housing case 14 changes due to vibration during traveling of the tractor, the cushions 44 and 46 are elastically expanded, The gap between the clutch housing case 14 and the frame plate 24 and the gap between the cover 44 and the clutch housing case 14 are continuously filled to prevent noise and the like from entering the cabin 4.

  The cushions 44 and 46 are shown in an exploded state in FIG. The cushion 47 is interposed between the upper frame plate 23 and the fuel tank 19. Cushions 48 and 49 are also provided on both the left and right sides and above the rubber plate 42, and gap filling and vibration isolation are performed between the rubber plate 42 and a structure provided around the subframe 21.

  As described above, since the fuel tank unit 22 in which the fuel tank 19 and the steering unit 33 are integrally provided is attached to the cabin frame 8 attached to the traveling machine body 3 in a vibration-proof state, vibration of the fuel tank unit 22 is prevented. Generation of noise due to vibration of the fuel tank 19 and vibration of the steering handle unit 33 can be prevented.

  This improves the operability of the steering wheel as well as soundproofing. The steering unit 33 does not need to be another assembly, and the mounting structure of the steering unit 33 can be simplified.

  Further, since the fuel tank 19 and the steering handle 32 (steering handle unit 33) are attached as an assembly to the cabin frame 8 as the fuel tank unit 22, only fixing of the subframe 20, the mounting frame 27, and the cabin frame 8 is released. Thus, the fuel tank 19 and the steering unit 32 can be easily removed from the cabin frame 8 together with the fuel tank unit 22.

  As a result, the cabin frame 8 and the fuel tank unit 22 can be easily handled separately. When the fuel tank unit 22 is removed from the cabin frame 8, when the cabin frame 8 is handled alone, piping and harnesses connected to the fuel tank 19 and the steering unit 33 side are removed from the cabin frame 8, Handling becomes easy.

  For example, as in the case where the fuel tank is directly attached to the cabin frame, it is not necessary to connect the fuel tank side piping and harness with the fuel tank attached to the cabin frame, and the fuel tank unit 22 is handled as a single unit. 19 and the steering unit 33 side piping and harness connection work, etc., and then the cabin frame 8 can be attached to the traveling machine body 3 side as a single unit, and the fuel tank unit 22 can be attached to the cabin frame 8.

  Further, when the maintenance is performed with the cabin frame 8 removed, the cabin frame 8 is removed with the fuel tank 19 and the piping and harness on the steering unit 33 side attached, or the cabin frame 8 is disconnected from the cabin frame 8 in advance. There is no need to remove the cabin 8, and the cabin frame 8 can be removed alone. As described above, maintenance and assembly are improved.

  As described above, the rubber plate 42 is inserted between the fuel tongue mounting frame 13 and the frame frame 21, and the gap between the fuel tongue mounting frame 13 and the frame frame 21 is filled with the rubber plate 42. The rubber plate 42 serves as a soundproof material, and noise due to interference between the fuel tongue mounting frame 13 and the frame frame 21 is prevented, and noise intrusion into the cabin 4 is prevented. Further, the dimensional error of the fuel tongue mounting frame 13 and the frame frame 21 can be absorbed by the elastic deformation of the rubber plate 42, and it is not necessary to extremely increase the processing accuracy and assembly accuracy of the parts.

  The above-described clutch pedal 16 is attached to the tip of the clutch arm 51 as shown in FIG. The clutch arm 51 is integrally attached to a swing arm 52 that is pivotally supported by a swing support point 50 on the rear side so as to be swingable up and down. The clutch arm 51 protrudes from the flange portion of the cover 18.

  A clutch hole 53 through which the clutch arm 51 passes is provided in the flange portion of the cover 18. The front end edge of the clutch arm 51 has an arc shape along the swinging locus of the clutch arm 51 in a side view. Thus, the gap between the clutch hole 53 and the front end edge of the clutch arm 51 does not change when the clutch pedal 16 is stepped on and released.

  For this reason, the clearance gap between the clutch hole 53 and the front-end edge of the clutch arm 51 can be made small, and it can prevent the penetration | invasion of the dust etc. in the cabin 4, and can also obtain a soundproofing effect. Further, the gap between the clutch hole 53 and the front end edge of the clutch arm 51 can be easily sealed, and the cost can be reduced. For example, as shown in FIG. 10, the clutch hole 53 can be easily closed by a rubber plate 54 that allows only passage of the clutch arm 51.

It is a perspective view of a tractor. It is a perspective view of a cabin frame and a clutch housing case. It is a perspective view which shows the state which attached the cabin frame to which the fuel tank unit was attached to the clutch housing case. It is a back perspective view of a fuel tank unit. It is a perspective view of a cabin frame simple substance. It is a front perspective view of a fuel tank unit in the state where a rubber plate was attached to a subframe. It is a perspective view which shows the relationship between a clutch housing case and each cushion. It is a perspective view which shows each cushion. It is a perspective view which shows a clutch pedal. It is a perspective view which shows the obstruction | occlusion state of a clutch hole.

Explanation of symbols

3 traveling body 4 cabin 8 cabin frame
13 Fuel tank mounting frame 14 Clutch housing case 19 Fuel tank 20 Subframe
21 Frame frame 22 Fuel tank unit 28 Steering mast 32 Steering handle 33 Steering unit (steering handle unit)
42 Rubber plate (soundproof material)
43 Cushion (cushion material)
46 Cushion (cushion material)

Claims (4)

In a work vehicle including a cabin (4) and a fuel tank (19), the fuel tank (19) is attached to the cabin frame (8), and the cabin frame (8) is attached to the traveling body (3) in a vibration-proof state. The sub-frame (20) to which the fuel tank (19) is attached is provided separately from the cabin frame (8), and the fuel tank (19) is attached to the sub-frame (20) to constitute the fuel tank unit (22). The cabin frame (8) includes a gate-shaped fuel tank mounting frame (13) for mounting the fuel tank (19), and the frame frame (21) provided on the subframe (20) is connected to the fuel tank mounting frame. (13) is formed in a gate shape, and the fuel frame mounting frame (13) is placed on the frame frame (21) while the subframe (20 By attaching to the cabin frame (8), a fuel tank unit (22) is attached to the cabin frame (8), also, by releasing the mounting of the sub-frame (20) and the cabin frame (8), fuel A work vehicle having a structure in which the tank unit (22) can be detached from the cabin frame (8), whereby the cabin frame (8) can be detached from the traveling machine body (3) alone .   A steering mast (28) is provided in the fuel tank unit (22), and the steering handle (32) unit (33) is attached to the steering mast (28), whereby the steering handle (32) is attached to the fuel tank unit (22). The work vehicle according to claim 1, wherein the work vehicle is provided integrally therewith.   The work vehicle according to claim 1 or 2, wherein a soundproof material (42) made of a resilient material is interposed between the subframe (20) and the cabin frame (8).   A clutch housing case (14) is arranged below the fuel tank unit (22) attached to the cabin frame (8), and between the clutch housing case (14) and the subframe (20) or the cabin frame (8). In addition, a space between the clutch housing case (14) and the subframe (20) or the cabin frame (8) is defined as a gap between the clutch housing case (14) and the subframe (20) or the cabin frame (8). The work vehicle according to claim 1, 2 or 3, wherein a cushioning material (43), (46) that closes in a state where variation is allowed is interposed.

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