JP5469377B2 - Agricultural tractor - Google Patents

Description

  The present invention relates to an agricultural tractor. In detail, it is related with the shape of the fender with which an agricultural tractor is provided.

  In a four-wheel type agricultural tractor, a configuration including a fender so as to cover the left and right rear wheels is common. Conventionally, in this type of tractor, the left and right fenders have been formed by separate molds. For this reason, mold costs and the like are increased, which causes an increase in cost.

  One of the important points when designing a fender for agricultural tractors is the quality of the appearance. For example, the shape and position of the fender are designed so as not to impair the appearance of the tractor in consideration of the clearance between the wheel and the fender, the harmony between the design of the vehicle body and the shape of the fender, and the like.

  In this regard, Patent Document 1 discloses a configuration in which a lower fender is used in common for each type in a tractor configured so that a plurality of types of cabins can be attached. Further, Patent Document 1 assumes that an appropriate gap between the fender and the rear wheel can be secured and the appearance can be improved by matching the inclination angle of the lower fender with the inclination angle of the support column of the roof frame.

JP 2003-182632 A

  However, the configuration of Patent Document 1 is intended to share parts among vehicle types having different cabin types, and separate molds are used for the left and right fenders in the same cabin type. It was necessary to mold. Therefore, the configuration of Patent Document 1 has room for improvement from the viewpoint of further reducing the mold cost and the like.

  The present invention has been made in view of the above circumstances, and its main object is to provide an agricultural tractor that realizes the left and right fenders at low cost and also has a good appearance of the fenders.

Means and effects for solving the problems

  The problems to be solved by the present invention are as described above. Next, means for solving the problems and the effects thereof will be described.

According to the first aspect of the present invention, the agricultural tractor belonging to any one of a plurality of vehicle cases, each of which has different axle positions of the rear wheels and different diameters of rear wheels that can be attached to the axles, An agricultural tractor configured as follows is provided. In other words, the agricultural tractor, while being arranged in correspondence with the left and right rear wheel of a comprises a configured fender so as to cover the front and top of the previous SL rear wheel. The fender has a shape in which the lower end portion of the base shape common to the left and right is cut, so that the fender has different shapes on the left and right. In the base shape, the first half and the second half are symmetrical with respect to the symmetry line . Then, in the side view, when considering the smallest virtual circle that substantially includes the maximum diameter of the rear wheel attached to each of the axle positions according to the vehicle case, the symmetry line of the fender is the center of the virtual circle. The fender is arranged so as to pass through the point.

That is, the base shape of the fender of different shapes at left and right, by configuring such that symmetrical between the first half portion and the latter half portion, it is possible to use the same base shape of the vehicle body of the left and right. Thereby, the expense of a metal mold | die etc. can be reduced and cost can be reduced. In addition, as described above, by determining the position of the symmetry line in relation to the center point of the virtual circle that substantially contains the maximum diameter of the wheel at each axle position, the diameter of the rear wheel and the axle position are made different. In addition, it is possible to provide a fender having a shape with a less uncomfortable appearance.

According to the second aspect of the present invention, the agricultural tractor belonging to any one of a plurality of vehicles having a common axle position of the rear wheels and different diameters of the rear wheels, The agricultural tractor comprised as follows is provided. In other words, the agricultural tractor, while being arranged in correspondence with the left and right rear wheel of a comprises a configured fender so as to cover the front and top of the previous SL rear wheel. The fender has a shape in which the lower end portion of the base shape common to the left and right is cut, so that the fender has different shapes on the left and right. In the base shape, the first half and the second half are symmetrical with respect to the symmetry line . And the said fender is arrange | positioned so that the said symmetry line of the said fender may pass the said axle position in side view.

That is, the base shape of the fender of different shapes at left and right, by configuring such that symmetrical between the first half portion and the latter half portion, it is possible to use the same base shape of the vehicle body of the left and right. Thereby, the expense of a metal mold | die etc. can be reduced and cost can be reduced. In addition, by determining the position of the symmetry line in relation to the axle position as described above, it is possible to provide a fender having a shape that is less uncomfortable to look even if the diameter of the rear wheel is varied.

According to the 3rd viewpoint of this invention, the agricultural tractor comprised as follows is provided. In other words, the agricultural tractor, while being arranged in correspondence with the left and right rear wheel of a comprises a configured fender so as to cover the front and top of the previous SL rear wheel. The fender has a shape in which the lower end portion of the base shape common to the left and right is cut, so that the fender has different shapes on the left and right. The base shape, the latter half portion and a front half portion around a symmetry line is symmetrical. In a side view, the bisector of the angle formed by the imaginary line passing through the front of the rear pillar of the cabin or the front of the safety frame and the imaginary line passing through the upper surface of the step of the driver seat is made to coincide with the symmetry line. The fender is arranged.

That is, the base shape of the fender of different shapes at left and right, by configuring such that symmetrical between the first half portion and the latter half portion, it is possible to use the same base shape of the vehicle body of the left and right. Thereby, the expense of a metal mold | die etc. can be reduced and cost can be reduced. Further, as described above, by determining the position of the symmetry line based on the relationship between the rear pillar or the safety frame and the step, it is possible to provide a fender having a shape that is highly harmonious with the appearance of the vehicle body.

Right side view showing an overall structure of a tractor according to an embodiment of the present invention. Right side view of the tractor vehicle class is different from the tractor of Figure 1. The perspective view of the tractor which removed the rear wheel. Right side view of a tractor removal of the rear wheel. The side view which shows the shape of the draw panel of a fender. (A) A side view of the left fender. (B) A side view of the right fender. The typical side view which shows arrangement | positioning of the fender in 1st Embodiment. The perspective view which shows the mode in a cabin. The side view of the left fender cover. Right side view of the tractor of the condition of removing a door glass. The typical front sectional view near the seal plate. The side view of a seal plate. The perspective view which shows the attachment state of a fender cover. The typical side view which shows arrangement | positioning of the fender in 2nd Embodiment. The typical side view which shows arrangement | positioning of the fender in 3rd Embodiment.

Next, a first embodiment of the present invention will be described with reference to the drawings. Figure 1 is a right side view of a tractor (agricultural tractor) 10 according to the first embodiment of the present invention.

  A tractor 10 as a farm work vehicle (work machine) shown in FIG. 1 is configured so that various devices such as a plow, a harrow, a loader, and the like can be mounted as necessary to perform various types of work. Yes. A front wheel 14 and a rear wheel 15 are arranged before and after the tractor 10.

  A bonnet 20 is disposed in front of the vehicle body of the tractor 10. An engine 19 is accommodated in the bonnet 20. The engine 19 is supported on the body frame 11 of the tractor 10 directly or via a vibration isolation member or the like.

  A cabin 16 for an operator to board is arranged behind the hood 20. An interior of the cabin 16 includes an operation unit 12 for performing various operations and a seat unit 13. An operator of the tractor 10 can perform a traveling operation or the like of the tractor 10 via the operation unit 12. Moreover, the cabin 16 has a door having a door glass 52 and a weather strip 52 a attached along an edge of the door glass 52 on the left and right.

  A fender 30 for the rear wheel 15 is disposed at the lower rear portion of the cabin 16. A fender upper cover 18 incorporating a tail lamp 17 and the like is disposed on the upper surface of the fender 30.

  By the way, the tractor 10 of this embodiment is designed as one vehicle case in a series of vehicle type lineup composed of a plurality of vehicle cases. Here, the vehicle type lineup is prepared by preparing a plurality of vehicle grades having different output of the engine 19 and the like while sharing the basic configuration of the vehicle body such as the fuselage frame 11, the cabin 16, and the fender 30. By providing a plurality of vehicle grades in this way, it is possible to meet the diverse needs of consumers.

  Further, the vehicle type lineup to which the tractor 10 of the present embodiment belongs is configured such that the higher the engine output, the longer the wheelbase and the larger the diameter of the rear wheel that can be attached.

  For example, FIG. 2 shows a side view of a tractor 90 that belongs to the same vehicle type lineup as the tractor 10 of the present embodiment and is designed as a vehicle grade (vehicle type with a high engine 19 output) higher than the tractor 10 of FIG. .

  In FIG. 2, the outer contour of the rear wheel 15 in the tractor 10 of FIG. 1 and the position of the axle 23 are indicated by a two-dot chain line for comparison. As can be seen from FIG. 2, the tractor 90 includes a rear wheel 95 having a larger diameter than the rear wheel 15 included in the tractor 10 of FIG. 1. Further, in the tractor 90 of FIG. 2, the position of the axle 93 for attaching the rear wheel 95 is changed to be lower rearward than the axle 23 in the case of the tractor 10 of FIG. 1. As a result, the wheel base can be expanded as compared with the tractor 10 of FIG. 1, and the rear wheel 95 having a larger diameter can be mounted.

  Further, as described above, in the tractor 90 of FIG. 2, the basic configuration of the vehicle body such as the body frame 11, the cabin 16, the fender 30 and the like is common to the tractor 10 of FIG. 1 belonging to the same vehicle type lineup. Thus, cost reduction is realized by sharing parts between the tractors 10 and 90 having different vehicle grades.

  Next, the configuration of the fender 30 included in the tractor 10 of the present embodiment will be described. 3 and 4 show the tractor with the rear wheel 15 removed in order to better illustrate the fender 30. FIG. 3 is a perspective view of the tractor 10 with the rear wheel 15 removed from an oblique rear, and FIG. 4 is a side view of the tractor 10 with the rear wheel 15 removed.

  The fender 30 is made of sheet metal and is formed by pressing. As shown in FIGS. 3 and 4, the fender 30 is disposed on the front upper side as viewed from the axle 23 that is the mounting shaft of the rear wheel 15, and thereby covers the front and upper sides of the rear wheel 15. It is configured. 3 and 4 mainly show the fender 30L on the left rear wheel side, the fender 30R on the right rear wheel side has the same configuration.

  Here, the shapes of the left and right fenders 30 are substantially mirror images of each other. Therefore, generally, the shape of the fender 30 cannot be made common to the left and right. For this reason, as described above, conventionally, fenders are formed using separate molds for the left and right, leading to an increase in cost.

  Therefore, in the tractor 10 of the present embodiment, the shape of the fender 30 is determined so that the left and right fenders 30 can share the shape of the draw panel. Thereby, it becomes possible to make the draw type (the mold for forming the draw panel) common to the left and right fenders 30, and the manufacturing cost of the vehicle body can be greatly reduced.

  The draw panel is an intermediate shape formed by press molding. That is, general press molding is performed in a plurality of steps using a plurality of press dies. For example, in the case of the fender 30 of this embodiment, a draw panel is formed by drawing a steel plate with a draw mold. Thereafter, trimming using a trim mold, bending using a flange mold, and the like are performed on the draw panel, thereby completing the fender 30 as a final shape. Note that the shape of the draw panel is the shape that serves as the foundation (base) of the left and right fenders, and therefore can be referred to as a “base shape”.

  Hereinafter, the shape of the draw panel will be specifically described with reference to FIG. FIG. 5 is a side view showing the shape of the draw panel 31, which is in the middle of molding the fender 30 provided in the tractor 10 of the present embodiment.

  The draw panel 31 is formed symmetrically with respect to the symmetry line 32 in the figure (more precisely, the plane including the symmetry line 32 in the figure and orthogonal to the paper surface is symmetrical. As a plane, it is formed in a plane symmetry). By designing the fender 30 so that the draw panel 31 has such a symmetrical shape, a common draw panel can be used for the left and right fenders 30.

  The symmetrical draw panel 31 formed as described above may be used as the fender 30 as it is. However, for the design reasons, the draw panel 31 is used as the fender 30 as it is (base shape). May not be possible. In such a case, after forming the symmetrical draw panel 31 as described above, the draw panel 31 is subjected to appropriate processing such as cutting unnecessary portions by trim processing using a trim mold. Of course, the method of cutting the draw panel 31 may be, for example, laser cutting, in addition to press molding using a trim die.

  FIG. 6 shows the actual shape of the fender 30 after the draw panel 31 has been cut. 6A is a side view of the left fender 30L, and FIG. 6B is a side view of the right fender 30R. In the figure, the outline shape of the draw panel 31 before being cut is indicated by a two-dot chain line.

  In the case of the present embodiment, as shown in FIGS. 3 and 4, a stay 22 that is a part of the cabin frame is disposed at the attachment position of the fender 30. In order to avoid interference with the stay 22, as shown in FIG. 6, a part of the draw panel 31 is cut to form a notch 33. Further, in order to improve the appearance by aligning the height between the bottom surface 16a of the cabin 16 and the lower end portion of the fender 30, the lower end portion of the draw panel 31 is cut by a predetermined length 34 as shown in FIG. Is done.

Then, as shown in the right side view of FIG. 4, in the state where the fender 30L is attached to the vehicle body, in a side view, (mainly to cover part of the front portion of the rear wheel 15) the first half of the draw panel 31 and the second half The portion (the portion that mainly covers the upper portion of the rear wheel 15) is symmetrical about the symmetry line 32. Incidentally, the left side view of the tractor 10 is omitted, it is mounted on the vehicle body as well right fender 30R

  As described above, in the present embodiment, the shape of the draw panel 31 is the same on the left and right, and the fenders 30 having different shapes on the left and right are finally obtained by performing processing such as cutting. Thus, even if the final shape of the fender 30 is different between the left and right, the draw type can be shared by the left and right fenders 30, so that a significant cost reduction can be achieved.

  By the way, in designing the fender 30, the viewpoint of cost reduction as described above is of course important. However, it should be sufficiently considered that the fender 30 looks good when applied to an actual tractor.

  When it can be determined that the appearance around the fender 30 is beautiful, when viewed from the side, the distance between the fender 30 and the rear wheel 15 is not too large. It is conceivable that they are not biased, the curvature of the fender 30 and the curvature of the rear wheel 15 are not greatly different, and in any case, the positional relationship between the rear wheel 15 and the fender 30 is important.

  On the other hand, as described above, the tractor 10 of the present embodiment is designed as one of a series of vehicle types, and the fender 30 is also used for tractors of other vehicle types. However, if the vehicle grades are different, the diameter of the rear wheel 15 and the position of the axle 23 are different, so that the positional relationship between the fender 30 and the rear wheel 15 changes, and a vehicle case that impairs the appearance may occur.

  Here, if a dedicated fender 30 is designed for each of a plurality of vehicle cases, the appearance of the tractor can be sought for the maximum extent for each vehicle case. However, in this case, since it is necessary to form a fender according to each vehicle case, a dedicated die or the like is required for each vehicle case, resulting in an increase in cost. In this way, if separate molds are required for each vehicle type, even if it is possible to use a common mold on the left and right by making the draw panel symmetrical, the cost reduction effect is sufficient I can't say that.

  In other words, there is a need for a fender that has a common base shape (draw panel shape) on the left and right sides, and that does not impair the appearance of the fender even if the fender is shared by multiple vehicle grades with different axle positions and rear wheel diameters. .

  Therefore, in this embodiment, the fender 30 is designed by a method as shown in FIG. FIG. 7 is a schematic side view showing the arrangement of the fenders 30.

  As described above, in the vehicle lineup to which the tractor according to the present embodiment belongs, the axle position is different if the vehicle type is different. FIG. 7 illustrates the position of the axle 23 in the tractor 10 of the vehicle case of FIG. 1 and the position of the axle 93 in the tractor 90 of the vehicle case of FIG. In each vehicle case, the diameter of the rear wheel that can be attached to the axle is determined. Here, in FIG. 7, the maximum diameter of the rear wheel 15 that can be attached to the axle 23 in the tractor 10 of the vehicle case of FIG. 1 and the maximum of the rear wheel 95 that can be attached to the axle 93 of the tractor 90 of the vehicle case of FIG. The diameter is indicated by a thin two-dot chain circle.

  Thus, when there are a plurality of axle positions in the vehicle lineup, the smallest virtual circle that substantially contains the largest rear wheel that can be attached to each axle is obtained in a side view, and the center point of the virtual circle is determined. Ask. Then, the center point of this virtual circle can be thought of as the average position of the rear axle in the vehicle lineup. Therefore, by designing the fender 30 based on this center point, a certain degree of appearance can be ensured in a plurality of vehicle tractors having different axle positions.

  For example, in the case of FIG. 7, a circle indicating the maximum diameter of the rear wheel that can be attached to the axle 23 (indicated by reference numeral 15) and a circle indicating the maximum diameter of the rear wheel that can be attached to the axle 93 (indicated by reference numeral 95). Are drawn, and a center point 101 of the virtual circle 100 is obtained.

  Then, as shown in FIG. 7, the symmetry line 32 is determined so as to pass through the position of the center point 101 in a side view. Based on the symmetry line 32, the shape and arrangement position of the fender 30 are determined. That is, when the fender 30 having the draw panel shape formed symmetrically is arranged on the vehicle body of the tractor 10, the fender 30 and the cabin 16 are arranged so that the symmetry line 32 passes through the center point 101 of the virtual circle 100. design.

  Thereby, since the positional relationship between the rear wheel and the fender 30 can be appropriate in any of the plurality of vehicle cases, the fender 30 can be made with a less uncomfortable appearance. Accordingly, the fender 30 can be used in common for a plurality of vehicle grades, and the cost can be greatly reduced. In the present embodiment, as shown in FIG. 7, the fender 30 and the cabin 16 are designed so that the symmetry line 32 is a line drawn at an angle of about 45 ° from the center point 101 of the virtual circle 100 to the front upper side. doing. Thereby, when arrange | positioning the fender 30, it can comprise so that the front part and upper part of a rear-wheel can be covered appropriately by the said fender 30.

  In the above description, the configuration in which the base shape of the fender 30 is common to the left and right has been described. However, if the viewpoint of the present invention that reduces the cost by making the base shape common to the left and right is further developed, For other configurations, it is preferable to share the base shape on the left and right. In this respect, in the tractor 10 of the present embodiment, the left and right base shapes are common to the fender cover and the seal plate. This will be specifically described below.

  The fender cover will be described. The fender cover 50 is an interior material that is attached to the fender 30 protruding into the cabin 16 from the inside of the cabin 16.

  That is, in the tractor 10 of the present embodiment, the fender 30 is integrally attached to the cabin 16 as shown in FIG. The inside of the fender 30 constitutes a wheel house, and a portion of the wheel house protrudes into the cabin 16. A state in which the wheel house protrudes into the cabin 16 is shown in the perspective view of FIG. Here, if the sheet metal fender 30 is exposed in the cabin 16, the feel and appearance when touched are not good, so the fender 30 protrudes into the cabin 16 (the wheel house portion), A fender cover 50 as an interior material is pasted (see FIG. 8). As a result, the fender 30 can be prevented from being directly exposed in the cabin 16.

  The fender cover 50 is made of a cushioning material, and a common base shape is formed on the left and right by, for example, vacuum forming. Then, by trimming the base shape, fender covers 50 having different shapes on the left and right are formed.

  A side view of the left fender cover 50 is shown in FIG. Although a side view of the right fender cover is omitted, the mirror image of the left fender cover 50 shown in FIG. 9 is the shape of the right fender cover. Further, in FIG. 9, the base shape 50a of the left fender cover 50 is drawn by a two-dot chain line. As shown in FIG. 9, the base shape 50a of the fender cover 50 is formed symmetrically about the symmetry line 50x. Therefore, similar to the draw panel 31 of the fender 30 described above, a common base shape 50 a can be used for the left and right fender covers 50.

  Next, the seal plate will be described with reference to FIG. FIG. 10 is a side view showing the tractor 10 with the door glass 52 and the like removed in order to better illustrate the seal plate 51.

  The seal plate 51 is made of sheet metal and is attached to the upper surface of the fender 30 by welding. The seal plate 51 is formed in a substantially arc shape in accordance with the curvature of the upper surface of the fender 30. The seal plate 51 has a contact surface 51a formed substantially parallel to the door glass 52, and the contact surface 51a comes into contact with the weather strip 52a of the door when the door is closed. It is configured.

  Specifically, as shown in the schematic front sectional view of FIG. 11, the seal plate 51 has a substantially U-shaped cross section. As shown in FIG. 11, the seal plate 51 includes a welded portion 51 b welded to the upper surface of the fender 30, and a vertical portion 51 c that is bent substantially perpendicularly from the welded portion 51 b and extends upward in the cross section of FIG. 11. Similarly, the cross section includes a horizontal portion 51d that is bent at a substantially right angle from the vertical portion 51c. Further, the seal plate 51 is attached so that the U-shaped open end side of the cross section of FIG. A surface of the vertical portion 51c facing the vehicle body constitutes the contact surface 51a.

  As shown in FIG. 11, when the door is closed, the weather strip 52a of the door abuts against the abutting surface 51a so that the function of sealing the outside and the inside of the cabin 16 is exhibited. Has been.

  A side view of the seal plate 51 is shown in FIG. As shown in FIG. 12, the seal plate 51 is formed symmetrically about a symmetry line 51x. Thereby, a common seal plate 51 can be used on the left and right. In addition, since the seal plate 51 is attached to the tractor 10 with the same shape on the left and right (without performing trim processing or the like), the shape of the seal plate 51 itself can be grasped as the base shape of the seal plate 51.

  Further, the fender cover 50 and the seal plate 51 are arranged on the vehicle body of the tractor 10 so that the symmetry lines 50x and 51x of the fender cover 50 and the seal plate 51 coincide with the symmetry line 32 of the fender 30 (FIG. 10 side view). Thereby, the fender cover 50 and the seal plate 51 can be arranged so that the visual consistency with the fender 30 is good.

  In the present embodiment, as shown in FIG. 11, the air conditioner hose 70, the wire harness 71, and the like are passed through the inside of the U shape formed by the seal plate 51. Accordingly, the air conditioner hose 70, the wire harness 71 and the like can be routed without being exposed in the cabin 16.

  Next, the attachment structure of the fender cover 50 will be briefly described. As described above, since the fender cover 50 is made of a cushioning material, it has a certain degree of flexibility. Therefore, from the viewpoint of preventing the fender cover 50 from peeling off, it is preferable to attach the fender cover 50 so as to press down the edge of the fender cover 50. Therefore, in this embodiment, the fender cover 50 is attached as follows.

  Hereinafter, a description will be given with reference to FIGS. 11 and 13. FIG. 13 is a perspective view showing the inside of the cabin with the seal plate cover 53 (described later) removed in order to better show the attached state of the fender cover 50. As shown in FIGS. 11 and 13, a plurality of mounting stays 58 are attached to the inside of the U-shape of the seal plate 51 by welding or the like. On the other hand, in the vicinity of the edge of the fender cover 50, a plurality of insertion holes 50b formed in a slit shape are formed. By inserting the attachment stay 58 through the insertion hole 50b (the state shown in FIG. 13), it is possible to prevent the fender cover 50 from being displaced.

  After the fender cover 50 is attached to the attachment stay 58 in this way, the inside of the U-shape (the attachment stay 58, the air conditioner hose 70, the wire harness 71, etc.) is made invisible from the cabin 16. Therefore, the resin seal plate cover 53 is attached so as to close the open portion of the U-shape (see FIGS. 8 and 11). The seal plate cover 53 is fixed to the mounting stay 58 with a resin rivet 59 or the like. At this time, as shown in FIG. 11, the seal plate cover 53 is fixed such that the lower end portion 53 a of the seal plate cover 53 presses the end portion of the fender cover 50 from the upper side of the drawing. Thereby, peeling of the fender cover 50 can be prevented.

  Further, the edge portion of the fender cover 50 is configured to be pressed by a member other than the seal plate cover 53. For example, as shown in FIG. 13, each member is attached so that the edge of the fender cover 50 is pressed by the frame cover 55, the floor mat 56, the lever guide 57, and the like. Accordingly, the edge of the fender cover 50 is fixed and the edge of the fender cover 50 is not exposed in the cabin 16, so that the fender cover 50 can be prevented from peeling off.

  As described above, the tractor 10 according to the first embodiment is for agricultural use belonging to any vehicle type among a plurality of vehicle types having different axle positions of rear wheels and diameters of rear wheels that can be attached to the axles. The tractor is configured as follows. That is, the tractor 10 is arranged corresponding to each of the left and right rear wheels 15, and the shape of the draw panel 31 is common to the left and right, and the fender is configured to cover the front portion and the upper portion of the rear wheel 15. 30. The shape of the draw panel 31 of the fender 30 is formed so that the front half and the rear half are symmetrical about the symmetry line 32. Then, in the side view, when considering the smallest virtual circle 100 substantially including the maximum diameter of the rear wheel attached to each axle position according to the vehicle case, the symmetry line 32 of the fender 30 is the center of the virtual circle 100. The fender 30 is arranged so as to pass through the point 101.

  That is, by configuring the draw panel 31 of the fender 30 to be symmetrical between the front half and the rear half, the same draw panel 31 can be used on the left and right sides of the vehicle body. Thereby, the expense of a metal mold | die etc. can be reduced and cost can be reduced. Further, as described above, by determining the position of the symmetry line 32 in relation to the center point 101 of the virtual circle 100 that substantially contains the maximum wheel diameter at each axle position, the diameter of the rear wheel and the axle position are determined. Even if it is made different, the fender 30 can be formed in a shape with less uncomfortable appearance.

  Next, a second embodiment of the present invention will be described.

  The tractor of this embodiment has the same configuration as the tractor 10 shown in FIG. 1, but the configuration of the vehicle lineup to which the tractor belongs is different. That is, the vehicle type lineup to which the tractor of the present embodiment belongs has a common wheel base among a plurality of vehicle cases constituting the vehicle type lineup (that is, the rear wheel axle position is unchanged), and only the rear wheel diameter. It is the structure which changes according to a vehicle case.

  For example, FIG. 14 shows a schematic side view when the rear wheel 15 and the rear wheel 85 having a larger diameter are attached to the axle 23. In this way, when the position of the axle 23 is common, there is no need to obtain the center point 101 of the virtual circle 100 as in the first embodiment, and the position of the axle 23 in the side view as shown in FIG. The symmetry line 32 is determined so that. Then, the fender 30 and the cabin 16 may be designed based on the symmetry line 32. If comprised in this way, even if the diameter of a rear wheel differs, since the positional relationship of a rear wheel and the fender 30 can be made appropriate, even if it makes the fender 30 common among several vehicle grades, it looks Therefore, the fender 30 can be reduced.

  As described above, the tractor according to the second embodiment is an agricultural tractor belonging to one of a plurality of vehicle types having a common rear axle position and a different diameter of the rear wheel. Therefore, it is configured as follows. That is, the tractor is arranged corresponding to each of the left and right rear wheels 15, and the shape of the draw panel 31 is common to the left and right, and the fender 30 is configured to cover the front and upper portions of the rear wheel 15. Is provided. The shape of the draw panel 31 of the fender 30 is formed so that the front half and the rear half are symmetrical about the symmetry line 32. And the fender 30 is arrange | positioned so that the symmetry line 32 of the fender 30 may pass the position of the axle shaft 23 in side view.

  As described above, by determining the position of the symmetry line 32 in relation to the axle position, the fender 30 having a shape that is less likely to be strange even when the diameter of the rear wheel 15 is varied can be obtained.

  Next, a third embodiment of the present invention will be described.

  That is, in the first and second embodiments described above, the symmetry line 32 of the fender 30 is determined by paying attention to the positional relationship between the rear wheel and the axle, but in this embodiment, the symmetry line 32 is symmetrical with respect to the cabin 16. Line 32 is determined.

  This will be specifically described below. The tractor of this embodiment has the same configuration as the tractor 10 of the first embodiment, and has a rear pillar 40 of the cabin 16 as shown in FIG. A step (floor surface) 41 is formed in the driver's seat in the cabin 16.

  In the case of the tractor having such a configuration, for example, as shown in the schematic side view of FIG. 15, the tractor is formed at intersections of virtual lines passing through the front surface of the rear pillar 40 and the upper surface of the step 41 in the side view. A virtual line that bisects the interior angle is drawn on the front upper side, and this virtual line is adopted as the symmetry line 32. Based on the symmetry line 32, the fender 30 and the cabin 16 are designed.

  That is, since the fender 30 is disposed below the cabin 16, it is also important that the appearance of the fender 30 is in harmony with the cabin 16. In this regard, if the shape of the fender 30 is determined as described above, the design harmony between the cabin 16 and the fender 30 can be enhanced.

  Moreover, even if the tractor does not have a cabin, a safety frame (a frame rising from the left and right sides of the driver's seat) as ROPS (Roll-Over Protective Structure) is used to protect the driver's seat operator when the vehicle rolls over. ), The symmetry line 32 can be determined in the same manner as described above. That is, the reference line 40 in FIG. 15 is considered as a safety frame, and the symmetry line 32 may be determined by the same procedure.

  As described above, the tractor of the third embodiment is configured as follows. That is, this tractor is arranged corresponding to each of the left and right rear wheels, and the shape of the draw panel 31 is common to the left and right, and the fender 30 configured to cover the front and top of the rear wheel is provided. Prepare. The shape of the draw panel 31 of the fender 30 is formed so that the front half and the rear half are symmetrical about the symmetry line 32. In a side view, the bisector of the angle formed by the imaginary line passing through the front surface of the rear pillar 40 or the front surface of the safety frame of the cabin 16 and the imaginary line passing through the top surface of the driver step 41 coincides with the symmetry line 32. Thus, the fender 30 is arranged.

  That is, the same draw panel 31 can be used on the left and right sides of the vehicle body by configuring the shape of the draw panel 31 of the fender 30 to be symmetrical between the front half and the rear half. Thereby, the expense of a metal mold | die etc. can be reduced and cost can be reduced. Further, as described above, by determining the position of the symmetry line based on the relationship between the rear pillar 40 or the safety frame and the step 41, it is possible to provide a fender having a shape that is highly harmonious with the appearance of the vehicle body.

  Although the preferred embodiment of the present invention has been described above, the above configuration can be changed as follows, for example.

  In the description of the first embodiment, FIG. 7 illustrates the case where there are two axle positions. Similarly, even when there are three or more axle positions, the maximum rear wheel diameter that can be attached to each axle position is determined. It is only necessary to draw the circle shown and obtain the smallest virtual circle containing all the circles showing the maximum diameter.

  In the above-described embodiment, the left and right fenders share a draw type when the fender is press-molded. In this respect, in addition to the draw type, when the trim type, the flange type, the piercing type, etc. can be shared on the left and right, it is preferable from the viewpoint of cost reduction that these dies are also shared on the left and right. Even if trim processing, bending processing, drilling processing, etc. are performed on the draw panel, the molded shape formed as a result of the processing is still symmetrical with the symmetry line as the center. As long as there is a certain shape, the molded shape can be understood as a “base shape” in the sense of a shape that serves as a foundation (base) for the left and right fenders.

  In the above embodiment, the fender 30 is made of sheet metal, but may be made of resin, for example. For example, when the fender 30 is formed by resin vacuum forming, the shape formed by the vacuum forming is a symmetrical shape centered on the symmetry line, thereby reducing the cost by making the vacuum forming molds common to the left and right. be able to. Note that the shape formed by vacuum forming in this way is also the shape that forms the basis of the left and right fenders, and therefore can be grasped as the “base shape”.

10 Tractor (agricultural tractor)
15 Rear wheel 16 Cabin 23 Axle 30 Fender 31 Draw panel (base shape)
32 symmetry line 40 rear pillar 41 step 100 virtual circle 101 center point of virtual circle

Claims (3)

Agricultural tractor belonging to any vehicle class among a plurality of vehicle classes in which the axle position of the rear wheel and the diameter of the rear wheel that can be attached to the axle are different,
Together are arranged corresponding to the respective left and right rear wheels, a structure has been fender so as to cover the front and top of the previous SL rear wheels,
The fender has a shape in which the lower end of the base shape common to the left and right is cut, and the fender has a different shape on the left and right.
Before Symbol base shape in the late part and the front half portion in the center of the line of symmetry is symmetry Katachidea Rutotomoni,
In a side view, when considering the smallest virtual circle substantially including the maximum diameter of the rear wheel attached to each of the axle positions according to the vehicle case, the symmetry line of the fender indicates the center point of the virtual circle. An agricultural tractor, wherein the fender is arranged to pass therethrough. Agricultural tractor belonging to any vehicle class among a plurality of vehicle classes in which the rear wheel axle position is common and the rear wheel diameters are different from each other.
Together are arranged corresponding to the respective left and right rear wheels, a structure has been fender so as to cover the front and top of the previous SL rear wheels,
The fender has a shape in which the lower end of the base shape common to the left and right is cut, and the fender has a different shape on the left and right.
Before Symbol base shape in the late part and the front half portion in the center of the line of symmetry is symmetry Katachidea Rutotomoni,
The agricultural tractor, wherein the fender is arranged so that the symmetry line of the fender passes through the axle position in a side view. Together are arranged corresponding to the respective left and right rear wheels, a structure has been fender so as to cover the front and top of the previous SL rear wheels,
The fender has a shape in which the lower end of the base shape common to the left and right is cut, and the fender has a different shape on the left and right.
Before Symbol base shape in the late part and the front half portion in the center of the line of symmetry is symmetry Katachidea Rutotomoni,
In the side view, the fender is configured so that a bisector of an angle formed by an imaginary line passing through the front surface of the rear pillar of the cabin or the front surface of the safety frame and an imaginary line passing through the upper surface of the step of the driver's seat coincides with the symmetry line. Agricultural tractor characterized in that is arranged.

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