Work vehicles

Abstract

To solve the problem that, although work vehicles such as agricultural tractors having a front side ROPS member are known, rigid attachment of the ROPS member is not necessarily adequately implemented in work vehicles such as conventional agricultural tractors.SOLUTION: An agricultural tractor includes: an engine 30 generating power by utilizing fuel; a front frame 60 attached to the engine 30 to support front wheels 40f; a transmission mechanism 70 mounted to the engine 30 to transmit the power generated by the engine 30 to rear wheels 40b; and a front side ROPS member 80 attached to the front frame 60 and a front side part 70f of the transmission mechanism 70.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to work vehicles such as agricultural tractors. [Background technology]

[0002] BACKGROUND ART Work vehicles such as agricultural tractors that have a front ROP member are known (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 6611669 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the case of work vehicles such as the above-mentioned conventional agricultural tractors, the front ROP member is not necessarily securely attached sufficiently.

[0005] SUMMARY OF THE INVENTION In consideration of the above-mentioned problems in the prior art, the present invention aims to provide a work vehicle that can achieve a more secure attachment of the front ROPs member. [Means for solving the problem]

[0006] The first aspect of the present invention is an engine that generates power using fuel; a front frame attached to the engine and supporting a front wheel; a transmission mechanism attached to the engine that transmits the power generated by the engine to rear wheels; a front ROP member attached to the front frame and the front side of the transmission mechanism; It is equipped with The front ROP member has a front ROP left pillar member and a front ROP right pillar member respectively erected on the left and right sides in the left-right direction of the vehicle body, a front ROP left plate is fixed to a lower end of the front ROP left pillar member, a front portion of the front ROP left plate is attached to the front frame, and a rear portion of the front ROP left plate is attached to the front portion of the transmission mechanism, a front ROP right plate is fixed to a lower end of the front ROP right pillar member, a front portion of the front ROP right plate is attached to the front frame, and a rear portion of the front ROP right plate is attached to the front portion of the transmission mechanism, A left spacer plate having a thickness corresponding to the gap between the front side portion of the front ROP left plate and the front frame is inserted, This work vehicle is characterized in that a right spacer plate having a thickness corresponding to the gap between the front portion of the front ROP right plate and the front frame is inserted. First invention related to the present inventionis an engine that uses fuel to generate power, a front frame attached to the engine and supporting a front wheel; a transmission mechanism attached to the engine that transmits the power generated by the engine to rear wheels; a front ROP member attached to the front frame and the front side of the transmission mechanism; The work vehicle is characterized by being equipped with:

[0007] As a result, the front ROPs member is attached to the front frame and the front side of the transmission mechanism, making it possible to achieve a more secure attachment of the front ROPs member.

[0008] Second invention related to the present invention The front ROP member has a front ROP left pillar member and a front ROP right pillar member respectively erected on the left and right sides in the left-right direction of the vehicle body, a front ROP left plate is fixed to a lower end of the front ROP left pillar member, a front portion of the front ROP left plate is attached to the front frame, and a rear portion of the front ROP left plate is attached to the front portion of the transmission mechanism, A front ROP right plate is fixed to the lower end of the front ROP right pillar member, the front side of the front ROP right plate is attached to the front frame, and the rear side of the front ROP right plate is attached to the front side of the transmission mechanism. First invention related to the present invention It is a work vehicle.

[0009] As a result, the front portion of the left plate of the front ROP is attached to the front frame, the rear portion of the left plate of the front ROP is attached to the front portion of the transmission mechanism, the front portion of the right plate of the front ROP is attached to the front frame, and the rear portion of the right plate of the front ROP is attached to the front portion of the transmission mechanism, thereby achieving a simple configuration.

[0010] The third invention related to the present inventiona left spacer plate having a thickness corresponding to the gap between the front side portion of the front ROP left plate and the front frame is inserted; A right spacer plate having a thickness corresponding to the gap between the front portion of the right plate of the front ROP and the front frame is inserted. Second invention related to the present invention It is a work vehicle.

[0011] This allows for a flexible configuration since the left spacer plate is inserted and the right spacer plate is inserted.

[0012] The fourth invention related to the present invention The front ROP left pillar member and the front ROP right pillar member are members obtained by dividing a single U-shaped pipe material near the center of the U-shape. The third invention related to the present invention It is a work vehicle.

[0013] As a result, the left pillar member of the front ROP and the right pillar member of the front ROP can be obtained by dividing a single U-shaped pipe material near the center of the U-shape, thereby achieving an inexpensive configuration.

[0014] Fifth Invention Related to the Present Invention The present invention is characterized in that it comprises a rear axle housing and a rear ROP member attached to the rear side of the transmission mechanism. Any of the first to fourth inventions related to the present invention It is a work vehicle.

[0015] As a result, the rear ROPs member is attached to the rear side of the rear axle housing and the transmission mechanism, thereby achieving a more secure attachment of the rear ROPs member. [Effects of the Invention]

[0016] The present invention makes it possible to provide a work vehicle that can achieve more secure attachment of the front ROPS member. [Brief explanation of the drawings]

[0017] [Figure 1] FIG. 1 is a left side view of an agricultural tractor according to an embodiment of the present invention; [Figure 2] 1 is a perspective view of the vicinity of a front rope member and a rear rope member of an agricultural tractor according to an embodiment of the present invention; [Figure 3] (a) is a left side view of the vicinity of a front ROP member of an agricultural tractor according to an embodiment of the present invention; (b) is a left side view of the vicinity of a rear ROP member of an agricultural tractor according to an embodiment of the present invention; [Figure 4] 1 is a partial front view of a front rope member and a rear rope member of an agricultural tractor according to an embodiment of the present invention; [Figure 5] 1 is a perspective view of the vicinity of a front ROP member of an agricultural tractor according to an embodiment of the present invention; [Figure 6] 1 is a plan view of the vicinity of a front ROP member of an agricultural tractor according to an embodiment of the present invention; [Figure 7] 1 is a partial front view of a front ROP member of an agricultural tractor according to an embodiment of the present invention; [Figure 8] FIG. 1 is a perspective view of the rear ROP member and its vicinity of the agricultural tractor according to an embodiment of the present invention; [Figure 9] FIG. 1 is a left side view (part 1) of the vicinity of the rear ROP member of the agricultural tractor according to the embodiment of the present invention. [Figure 10] FIG. 2 is a left side view (part 2) of the rear ROP member of the agricultural tractor according to the embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0018] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail with reference to the drawings.

[0019] Similarly, some components may not be shown in the drawings, or may be shown in perspective or in an abbreviated form.

[0020] (1) First, the configuration and operation of an agricultural tractor according to an embodiment of the present invention will be specifically described with reference to FIGS. 1 to 4.

[0021] Here, Figure 1 is a left side view of an agricultural tractor according to an embodiment of the present invention, Figure 2 is an oblique view of the vicinity of the front ROPs member 80 and rear ROPs member 90 of an agricultural tractor according to an embodiment of the present invention, Figure 3(a) is a left side view of the vicinity of the front ROPs member 80 of an agricultural tractor according to an embodiment of the present invention, Figure 3(b) is a left side view of the vicinity of the rear ROPs member 90 of an agricultural tractor according to an embodiment of the present invention, and Figure 4 is a partial front view of the front ROPs member 80 and rear ROPs member 90 of an agricultural tractor according to an embodiment of the present invention.

[0022] The agricultural tractor of this embodiment is an example of a work vehicle of the present invention.

[0023] An engine 30 is provided inside a hood 31 at the front of the vehicle body 10 .

[0024] The rotational power of the engine 30 is transmitted via various clutches inside a transmission case provided below the floor 21 of the driving unit 20. More specifically, the rotational power whose speed is changed by the main transmission and the auxiliary transmission is transmitted to a pair of left and right front wheels 40f and a pair of left and right rear wheels 40b.

[0025] Behind the engine 30, a dashboard cover, a meter panel, a forward / reverse lever, and a steering wheel 23 are provided.

[0026] A driver's seat 22 is provided behind the steering wheel 23.

[0027] A brake pedal, a disconnecting pedal, and a clutch pedal are disposed on the left floor 21. A pair of left and right brake pedals and an accelerator pedal are disposed on the right floor 21.

[0028] A work machine is attached to the rear of the vehicle body 10 using, for example, a three-point linkage mechanism.

[0029] The work implement lifting mechanism includes a main cylinder, a lift arm, a top link, a pair of left and right lower links, a rotating cover, and a side cover. The front ends of the top link and the lower link are connected to the vehicle body 10, and the rear ends of the top link and the lower link are connected to the work implement. The rear ends of the lift arms, which are rotated by the main cylinder, are connected to the lower links. The rotation angle of the rotating cover is detected by a tillage depth sensor, and the rotation angle of the lift arms is detected by a lift arm sensor.

[0030] Information about the work equipment is acquired using a work equipment installation status acquisition device such as an ISO (International Organization for Standardization) BUS connected to the work equipment or an information terminal device mounted on the driving unit 20, and notified to the controller.

[0031] A front frame 60 attached to an engine 30 that uses fuel to generate power is a frame that supports the front wheels 40f.

[0032] For example, the front frame 60 has a front frame attached to the engine 30 that supports a front axle housing that functions as a front axle case that houses the axles of the front wheels 40f and supports the front load of the vehicle body 10.

[0033] The transmission mechanism 70 attached to the engine 30 is a mechanism that transmits the power generated by the engine 30 to the rear wheels 40b.

[0034] For example, the transmission mechanism 70 includes a transmission case attached to the engine 30 that houses a power transmission device that transmits the power of the engine 30 to the drive wheels.

[0035] (2) Next, the configuration and operation of the agricultural tractor according to the embodiment of the present invention will be described in more detail with reference mainly to FIGS.

[0036] Here, Figure 5 is an oblique view of the vicinity of the front ROPs member 80 of an agricultural tractor according to an embodiment of the present invention, Figure 6 is a plan view of the vicinity of the front ROPs member 80 of an agricultural tractor according to an embodiment of the present invention, and Figure 7 is a partial front view of the front ROPs member 80 of an agricultural tractor according to an embodiment of the present invention.

[0037] The front ROP member 80 is attached to the front frame 60 and the front portion 70 f of the transmission mechanism 70 .

[0038] For example, the front ROP member 80 has a front ROP central arch member 80C as the upper frame and a front ROP left pillar member 80L and a front ROP right pillar member 80R as the lower frame, and the rear ROP member 90 has a rear ROP central arch member 90C as the upper frame and a rear ROP left pillar member 90L and a rear ROP right pillar member 90R as the lower frame.

[0039] The front ROP member 80 in front of the driver's seat 22 is erected between the front wheel 40f and the rear wheel 40b as a safety frame that can protect the driver in the driver's seat 22 and ensure a survival space even if the vehicle body 10 were to tip over.

[0040] Of course, the rear ROPs member 90 erected behind the driver's seat 22, whose ROPs base is attached to the rear wheel axle housing 41b, which functions as a rear axle case that houses the axle of the rear wheel 40b to firmly support the entire load of the vehicle body 10, is also effective as a safety frame that is required to suppress frame deformation and maintain the frame shape even if it is subjected to the entire weight of the vehicle body 10 due to a rollover. However, when traveling in narrow spaces such as orchards and cultivation greenhouses, the driver often wants to operate the vehicle while monitoring that the safety frame does not come into contact with the trees in the orchard or the ceiling of the cultivation greenhouse, so there is also a low demand for the front ROPs member 80 erected in front of the driver's seat 22.

[0041] The front ROPs member 80, which is attached not only to the front frame 60 but also to the front portion 70f of the transmission mechanism 70, has a strong vehicle body mounting and fixing structure extending from the front frame 60 to the transmission mechanism 70, and thus, like the rear ROPs member 90, can suppress frame deformation and maintain the frame shape even if it is subjected to the entire weight of the vehicle body 10 due to a fall.

[0042] The front ROP member 80 has a front ROP left pillar member 80L and a front ROP right pillar member 80R which are erected on the left and right sides, respectively, in the left-right direction of the vehicle body.

[0043] A front ROP left plate 81L is fixed to the lower end of the front ROP left pillar member 80L, and the front part 81Lf of the front ROP left plate 81L is attached to the front frame 60, and the rear part 81Lb of the front ROP left plate 81L is attached to the front part 70f of the transmission mechanism 70.

[0044] More specifically, the front portion 81Lf of the front ROP left plate 81L is attached using three bolts whose bolt shafts are oriented in the left-right direction of the vehicle body, and the rear portion 81Lb of the front ROP left plate 81L is attached using four bolts whose bolt shafts are oriented in the left-right direction of the vehicle body.

[0045] By utilizing the front frame 60, which functions as a front wheel axle bracket, and the front part 70f of the transmission mechanism 70, which functions as a clutch housing, the front ROP left plate 81L of the front ROP left pillar member 80L of the front ROP member 80, also called the center ROP, is attached in two places, thereby improving strength as the load is distributed.

[0046] A front ROP right plate 81R is fixed to the lower end of the front ROP right pillar member 80R, and the front part 81Rf of the front ROP right plate 81R is attached to the front frame 60, and the rear part 81Rb of the front ROP right plate 81R is attached to the front part 70f of the transmission mechanism 70.

[0047] More specifically, the front portion 81Rf of the front ROP right plate 81R is attached using three bolts whose bolt shafts are oriented in the left-right direction of the vehicle body, and the rear portion 81Rb of the front ROP right plate 81R is attached using four bolts whose bolt shafts are oriented in the left-right direction of the vehicle body.

[0048] By utilizing the front frame 60, which functions as a front wheel axle bracket, and the front part 70f of the transmission mechanism 70, which functions as a clutch housing, the front ROP right plate 81R of the front ROP right pillar member 80R of the front ROP member 80, also called the center ROP, is attached in two places, thereby improving strength as the load is distributed.

[0049] A left spacer plate 82L having a thickness corresponding to the gap between the front portion 81Lf of the front ROPS left plate 81L and the front frame 60 is inserted.

[0050] By simply changing the thickness of the two left spacer plates 82L between the front ROP left plate 81L, which functions as the mounting portion of the front ROP member 80 (also called the center ROP), and the front frame 60, which functions as the front wheel axle bracket, flexible adjustments can be made to accommodate the various front wheel axle bracket widths in the left-right direction of the vehicle body, which vary depending on the tractor model, thereby promoting the use of a common center ROP. The front ROP left plate 81L, left spacer plate 82L, and front frame 60 are attached by bolting together, which does not have a direct effect on the engine 30, thereby suppressing the generation of large loads on the engine 30. Of course, the front ROP left plate 81L may also be attached by bolting to the left spacer plate 82L, which is fixed to the front frame 60 by welding or other means.

[0051] A right spacer plate 82R having a thickness corresponding to the gap between the front portion 81Rf of the front ROP right plate 81R and the front frame 60 is inserted.

[0052] By simply changing the thickness of the two right spacer plates 82R between the front ROP right plate 81R, which functions as the mounting portion of the front ROP member 80 (also called the center ROP), and the front frame 60, which functions as the front wheel axle bracket, flexible adjustments can be made to accommodate the various front wheel axle bracket widths in the left-right direction of the vehicle body, which vary depending on the tractor model, thereby promoting the use of a common center ROP. The front ROP right plate 81R, right spacer plate 82R, and front frame 60 are attached together by bolting, which does not directly affect the engine 30, thereby suppressing the generation of large loads on the engine 30. Of course, the front ROP right plate 81R may also be attached by bolting to the right spacer plate 82R, which is fixed to the front frame 60 by welding or other means.

[0053] The front ROP left pillar member 80L and the front ROP right pillar member 80R are members obtained by dividing a single U-shaped pipe material M near the center C of the U-shape.

[0054] More specifically, the shape of the front ROP left pillar member 80L and the front ROP right pillar member 80R, which serve as the lower frame of the front ROP member 80, is a U-shaped steel pipe bent at one point and divided into left and right sides.Since this type of lower frame bending process is required only once, processing costs, etc. are kept down.

[0055] In this way, the front ROP left pillar member 80L and the front ROP right pillar member 80R, which function as the lower frame of the center ROP, are constructed as a single unit using steel pipes with large curvatures, thereby reducing the unnecessary portion of pipe material M near the center C, which is the part that is removed when the structure is divided.

[0056] (3) Next, the configuration and operation of the agricultural tractor according to the embodiment of the present invention will be described in more detail, mainly with reference to FIGS.

[0057] Here, Figure 8 is an oblique view of the vicinity of the rear ROP member 90 of an agricultural tractor according to an embodiment of the present invention, and Figures 9 and 10 are left side views (parts 1 and 2) of the vicinity of the rear ROP member 90 of an agricultural tractor according to an embodiment of the present invention.

[0058] The rear ROP member 90 is attached to the rear axle housing 41b and the rear side 70b of the transmission mechanism 70.

[0059] The rear ROP member 90 has a rear ROP left pillar member 90L and a rear ROP right pillar member 90R that are erected on the left and right sides, respectively, in the left-right direction of the vehicle body.

[0060] A left L-shaped plate 91L of the rear ROP and a left I-shaped plate 92L of the rear ROP are fixed to the lower end of the left pillar member 90L of the rear ROP, and the left side portion of the left L-shaped plate 91L of the rear ROP and the left I-shaped plate 92L of the rear ROP are attached to the rear wheel axle housing 41b, and the rear side portion of the left L-shaped plate 91L of the rear ROP is attached to the rear side portion 70b of the transmission mechanism 70.

[0061] More specifically, the left side portion of the rear ROP left L-shaped plate 91L is attached using two bolts whose bolt shafts are directed in the left-right direction of the vehicle body, the rear side portion of the rear ROP left L-shaped plate 91L is attached using two bolts whose bolt shafts are directed in the fore-and-aft direction of the vehicle body, and the rear ROP left I-shaped plate 92L is attached using three bolts whose bolt shafts are directed in the left-right direction of the vehicle body.

[0062] The rear ROP left pillar member 90L, which functions as the lower frame of the rear ROP member 90 (also called the rear ROP), is attached to the rear axle housing 41b (which functions as the rear axle housing) at one location near the brake mechanism by using the rear ROP left L-shaped plate 91L, and is attached to the rear part 70b of the transmission mechanism 70 (which functions as the rear transmission case) at one location near the outer wall of the case, and is also attached to the rear axle housing 41b at one location near the wheel shaft through-hole by using the rear ROP left I-shaped plate 92L. In this way, a configuration is adopted in which the rear ROP left L-shaped plate 91L and the rear ROP left I-shaped plate 92L are attached at a total of three locations, thereby improving strength as the load is distributed.

[0063] A rear ROP right L-shaped plate 91R and a rear ROP right I-shaped plate 92R are fixed to the lower end of the rear ROP right pillar member 90R, and the right side of the rear ROP right L-shaped plate 91R and the rear ROP right I-shaped plate 92R are attached to the rear wheel axle housing 41b, and the rear side of the rear ROP right L-shaped plate 91R is attached to the rear side 70b of the transmission mechanism 70.

[0064] More specifically, the right side of the rear ROP right L-shaped plate 91R is attached using two bolts whose bolt shafts are directed in the left-right direction of the vehicle body, the rear side of the rear ROP right L-shaped plate 91R is attached using two bolts whose bolt shafts are directed in the fore-and-aft direction of the vehicle body, and the rear ROP right I-shaped plate 92R is attached using three bolts whose bolt shafts are directed in the left-and-right direction of the vehicle body.

[0065] The rear ROP right pillar member 90R, which functions as the lower frame of the rear ROP member 90 (also called the rear ROP), is attached to the rear axle housing 41b (which functions as the rear axle housing) at one location near the brake mechanism by using the rear ROP right L-shaped plate 91R, and is attached to the rear part 70b of the transmission mechanism 70 (which functions as the rear transmission case) at one location near the outer wall of the case, and is also attached to the rear axle housing 41b at one location near the wheel shaft through-hole by using the rear ROP right I-shaped plate 92R. In this way, a configuration is adopted in which the rear ROP right L-shaped plate 91R and the rear ROP right I-shaped plate 92R are attached at a total of three locations, thereby improving strength as the load is distributed. [Industrial Applicability]

[0066] The work vehicle of the present invention can achieve a more secure attachment of the front ROP member, and is useful for use in work vehicles such as agricultural tractors. [Explanation of symbols]

[0067] 10. Body 20 Operation Unit 21 floors 22 Driver's seat 23 Steering wheel 30 Engine 31 Bonnet 40f front wheel 40b rear wheel 41b Rear axle housing 60 previous frames 70 Transmission mechanism 70f front side 70b Rear side 80 Front ROP member 80C Front Rops central arch member 80L Front left pillar member 80R Front right pillar member of ROPS 81L Front left plate 81Lf front side 81Lb rear side 81R Front Rops Right Plate 81Rf Front side 81Rb posterior lateral 82L left spacer plate 82R right spacer plate 90 Rear ROP member 90C Rear Rops central arch member 90L Rear left pillar member 90R Rear right pillar member of ROPS 91L Rear L-shaped plate on the left side of the rear L-shaped plate 91R Rear L-shaped right plate 92L Rear LOP Left I-shaped plate 92R Rear ROPUS Right I-shaped Plate M tube material C center

Claims

[Claim 1] An engine that generates power using fuel; a front frame attached to the engine and supporting a front wheel; a transmission mechanism attached to the engine that transmits the power generated by the engine to rear wheels; a front ROP member attached to the front frame and the front side of the transmission mechanism; It is equipped with The front ROP member has a front ROP left pillar member and a front ROP right pillar member respectively erected on the left and right sides in the left-right direction of the vehicle body, a front ROP left plate is fixed to a lower end of the front ROP left pillar member, a front portion of the front ROP left plate is attached to the front frame, and a rear portion of the front ROP left plate is attached to the front portion of the transmission mechanism, a front ROP right plate is fixed to a lower end of the front ROP right pillar member, a front portion of the front ROP right plate is attached to the front frame, and a rear portion of the front ROP right plate is attached to the front portion of the transmission mechanism, A left spacer plate having a thickness corresponding to the gap between the front side portion of the front ROP left plate and the front frame is inserted, A work vehicle characterized in that a right spacer plate having a thickness corresponding to the gap between the front portion of the front ROP right plate and the front frame is inserted.

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