JP2007300808A - Working vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a working vehicle capable of simply preventing the breakage of an electric cable 81 by making a contact with a transmission mechanism 33 while capable of arranging the transmission mechanism 33 and the electric cable 81 as approaching with each other by utilizing a machine body frame. <P>SOLUTION: This working vehicle equipped with an engine 9 loaded at the front part of a traveling machine body 1 equipped with traveling parts 5, 6, a battery 22 for starting the engine 9 and a transmission case 19 for gearing the power of the engine 9 and transmitting it to front wheels 5 and rear wheels 6, and extending the electric cable 81 in the front side direction of the traveling machine body 1 from the battery 22 at the rear part of the traveling machine body 1 is provided by arranging a protective cover 80 between the transmission mechanism 33 for transmitting the power of the engine 9 to the transmission case 19 and the electric cable 81 extended along the traveling machine body 1. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a working vehicle such as a lawn mower equipped with a mower device for cutting turf grass planted on the ground, and more specifically, a battery mounted on the rear part of the traveling machine body and disposed on the front side of the traveling machine body. The present invention relates to a work vehicle that extends an electric cable to an electrical component such as an engine starter.

  2. Description of the Related Art Conventionally, a work vehicle such as a lawn mower is generally connected to a mower device with a rotary cutting blade mounted on a traveling machine body so as to be movable up and down, a substantially cylindrical discharge duct extending rearward from the mower device, and the exhaust duct. And a grass collection box. Further, when power is transmitted to the traveling parts such as the left and right traveling wheels or traveling crawlers, the power is transmitted from the engine mounted on the traveling body of the work vehicle to the transmission case, and the left and right traveling parts are transmitted via the transmission mechanism of the transmission case. Is configured to output the output.

In this case, in a conventional work vehicle, in order to secure the ventilation cross-sectional area of the discharge duct, a transmission case is disposed above the discharge duct, and the output of the engine is transmitted to the transmission relay case via the transmission shaft. A configuration has been adopted in which power is transmitted from the transmission relay case to the transmission case via an endless belt disposed above (see, for example, Patent Document 1). Moreover, it is well known that a transmission shaft for transmitting power from the engine to the transmission case is covered with a cover (see, for example, Patent Document 2). It is also known to extend an electric cable from a battery at the rear of the traveling machine body to an electrical component on the front side of the traveling machine body (see, for example, Patent Document 3).
JP 2004-105112 A JP 2003-95129 A JP 7-315149 A

  By the way, in patent document 1, the transmission relay case was arrange | positioned at the highly rigid body frame. Moreover, it is preferable to extend a long electric cable along the body frame. However, when an electrical cable is provided along the fuselage frame, the transmission shaft connected to the transmission relay case and the electrical cable are arranged close to each other, so the electrical cable is wound around the transmission shaft and shorted. There is a problem such as disconnection or disconnection.

  An object of the present invention is to allow the transmission mechanism and the electric cable to be arranged close to each other by using the fuselage frame, and to easily prevent the electric cable from being wound around the transmission mechanism. It is an object of the present invention to provide a work vehicle that can easily prevent contact and breakage.

  In order to achieve the above object, a work vehicle according to a first aspect of the present invention shifts an engine mounted on a front portion of a traveling machine body including a traveling unit, a battery for starting the engine, and power of the engine. And a transmission case that transmits the electric cable to the front side of the traveling vehicle body from the battery disposed at the rear of the traveling vehicle body. A protective cover body is disposed between the transmission mechanism for transmitting the power and the electric cable extended along the traveling machine body.

  According to a second aspect of the present invention, in the work vehicle according to the first aspect, a mowing is provided between a grass cutting unit disposed on a lower surface side of the traveling machine body and a grass collecting unit disposed on the rear side of the traveling machine body. A transmission duct for conveying the turfgrass is extended, and the transmission case is inclined to the front, lower, and rear height above the discharge duct, and the transmission case is inclined to the front, lower, and rear height. A propulsion shaft as a transmission mechanism that transmits and transmits the engine power to a relay input shaft that supports and disposes a transmission relay case in the body frame on the front side of the transmission case and projects forward from the front surface of the transmission relay case. And connecting the protective cover body to the fuselage frame and the transmission relay case, and extending the electric cable to the side of the relay input shaft with the protective cover body interposed therebetween. A.

  According to a third aspect of the present invention, in the work vehicle according to the second aspect, the transmission relay case and the protective cover body are connected to the body frame by a bolt for fastening the transmission relay case. is there.

  According to a fourth aspect of the present invention, in the work vehicle according to the second aspect of the present invention, the work vehicle includes a support frame for connecting the transmission relay case to the body frame, and the body frame and the protective cover body are connected to the body body. The frame is connected by a bolt for fastening the support frame.

  According to the first aspect of the present invention, the engine mounted on the front portion of the traveling machine body having the traveling unit, the battery for starting the engine, and the transmission case that shifts the power of the engine and transmits it to the traveling unit. A work vehicle in which an electric cable is extended from the battery disposed at the rear of the traveling aircraft body to the front side of the traveling aircraft body, a transmission mechanism that transmits the power of the engine to the transmission case, and Since the protective cover body is disposed between the electric cable extended along the traveling machine body, the transmission mechanism and the electric cable are brought close to each other by using the machine body frame forming the traveling machine body. It can be easily arranged, and it can be easily prevented that the electric cable is wound around the transmission mechanism, and the electric cable can be prevented from being damaged and short-circuited or disconnected. It is intended.

  According to the invention which concerns on Claim 2, between the grass cutting part arrange | positioned at the lower surface side of the said traveling body, and the grass collection part arrange | positioned at the back of the said traveling body, the discharge duct for conveying the cut turf grass The transmission case is supported on the vehicle body frame of the traveling vehicle body, which is inclined to the front low rear height above the discharge duct. A transmission relay case is disposed on the machine frame, and a propulsion shaft as a transmission mechanism for transmitting power of the engine is connected to a relay input shaft protruding forward on the front surface of the transmission relay case, and the machine frame, Since the protective cover body is connected to the transmission relay case, and the electric cable is extended to the side of the relay input shaft with the protective cover body interposed therebetween, the highly rigid airframe is provided. F The transmission relay case can be easily assembled using a loop, and the protective cover body can be used as a reinforcing material for supporting the transmission relay case on the body frame, and the transmission relay case is supported. The strength can be easily improved.

  According to the invention of claim 3, since the transmission relay case and the protective cover body are connected to the body frame by a bolt for fastening the transmission relay case, the transmission relay case and the There is no need to separately fasten the protective cover body to the machine body frame, and the assembly workability of the transmission relay case and the protective cover body can be easily improved.

  According to a fourth aspect of the present invention, a support frame for connecting the transmission relay case to the airframe is provided, and the airframe and the protective cover body are fastened to the support frame. Since it is connected by bolts, it is not necessary to fasten the support frame and the protective cover body separately to the machine body frame, and the assembly workability of the support frame and the protective cover body can be easily improved. It is.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, embodiments of the invention will be described with reference to the drawings (FIGS. 1 to 11). First, an outline of a lawn mower will be described with reference to FIGS. 1 is a side view of the entire lawn mower, FIG. 2 is a plan view thereof, FIG. 3 is a side view showing a traveling machine body of the lawn mower, and FIG. 4 is a plan view thereof.

  As shown in FIGS. 1 and 2, in the lawn mower according to this embodiment, the traveling machine body 1 includes left and right machine body frames 3 and 4 that are integrally connected via a plurality of horizontal rail frames 2. . The body frames 3 and 4 are supported by left and right front wheels 5 and left and right rear wheels 6 arranged in front and rear of the left and right sides.

  An engine 9 as a power source is built in the hood 8 on the upper side of the front cowl 7 that covers the front upper surface of the traveling machine body 1. A steering column portion 11 having a round steering handle 10 is mounted on the upper side of the rear portion of the bonnet 8. A shift pedal 12 for appropriately adjusting the vehicle speed and a brake pedal 13 for braking the traveling machine body 1 are disposed below the right side in the traveling direction of the steering column unit 11.

  A driver seat 15 is provided on the rear cowl 14 that covers the rear upper surface of the traveling machine body 1. When the operator sitting on the driver's seat 15 rotates the steering handle 10, the steering angle (steering angle) of the left and right front wheels 5 is changed according to the operation amount (rotation amount). ing. On the left side of the driver's seat 15, a mower elevating lever 17 for elevating and lowering a mower device 16 described later is provided so as to be able to rotate back and forth. A PTO clutch lever 18 for driving or stopping the mower device 16 is provided on the right side of the driver seat 10 so as to be able to rotate back and forth.

  In the rear cowl 12, a mission case 19 having a hydrostatic continuously variable transmission (HST type) and the like is disposed. An inclined portion having a front, low, rear, and high shape is formed at the rear of the body frames 3 and 4, and the mission case 19 is supported at an intermediate portion of the front and rear width of the inclined portions of the body frames 3 and 4. The mission case 19 is configured to transmit power from the engine 9 to the left and right rear wheels 6 by appropriately shifting power from the engine case 19. A fuel tank 20 that supplies fuel to the engine 9 is mounted at the rear end of the inclined portion of the body frames 3 and 4. An oil tank 21 that supplies hydraulic oil to the hydrostatic continuously variable transmission 100 of the mission case 19 is mounted outside the inclined portion of the right body frame 4. On the side opposite to the oil tank 21, a battery 22 used for starting the engine 9 is mounted outside the inclined portion of the left body frame 3 so as to sandwich the fuel tank 20.

  A mower device 16 for lawn mowing is mounted on the lower surface of the body frame 2 between the left and right front wheels 5 and the left and right rear wheels 6 through a front and rear link rods 23 and 24. . The mower device 15 is provided with a pair of left and right rotary cutting blades (not shown) that can rotate horizontally in a mower case 25 having a downward opening shape. Further, on the front and rear sides of the left and right sides of the mower case 25, four front and rear gauge wheels 26 and 27 for adjusting the height of the mower device 16 when lowered are attached. A duct portion 28 that opens rearward is provided on the upper surface of the mower case 25.

  The duct portion 28 communicates with a grass collection box 30 disposed at the rear portion of the traveling vehicle body 1 via a discharge duct 29 disposed between the left and right rear wheels 6 on the lower surfaces of the body frames 3 and 4. The grass collection box 30 is formed by stretching a net-like sheet in a square box shape, and the upper surface of the grass collection box 30 is covered with a dust-proof cover 31. The turf grass cut by the rotary cutting blade in the mower case 25 is conveyed from the duct portion 28 to the inside of the grass collection box 30 through the discharge duct 29 by the wind of the rotary cutting blade, and is cut by the mower device 16. Are collected in the grass collection box 30.

  Next, the power transmission system of the lawn mower will be described with reference to FIGS. In the lawn mower of this embodiment, a two-wheel drive system is adopted in which a part of the rotational power of the engine 9 is distributed to the left and right rear wheels 6.

  That is, a part of the rotational power of the engine 9 is forward from the rear end portion of the output shaft 32 protruding forward and backward outward from the engine 9 and the propulsion shaft 33 having universal joints at both front and rear ends, and the transmission case 19. Is transmitted to the transmission case 19 via a traveling transmission relay case 34 disposed at the above-described portion and an endless input belt 35 described later. Then, from the horizontal rear wheel drive shaft 36 projecting outward in the left and right directions on the transmission case 9, the left and right longitudinal portions provided on the rear side portion of the traveling machine body 1 through the endless rear wheel drive chain 37 and the sprockets 38 and 39. It is transmitted to the axle 40. As a result, the rear wheels 6 attached to the left and right ends of the axle 40 are driven to rotate.

  On the other hand, the other rotational power of the engine 9 is transmitted from the front end portion of the output shaft 32 to the PTO shaft 42 pivotally supported on the front portion of the body frame 4 via the endless PTO transmission belt 41 for PTO power transmission. . Next, power is transmitted from the PTO shaft 42 to a mower gear box 44 disposed on the right side of the body frame 4 on the upper surface of the mower case 25 through an intermediate shaft 43 having universal joints at both front and rear ends. . As a result, the left rotary cutting blade (not shown) in the mower case 25 is driven to rotate clockwise in plan view, and the right rotary cutting blade (not shown) is driven to rotate counterclockwise in plan view. Thus, while cutting the turf grass, the cut turf grass is collected at the center of the left and right width of the mower case 25 and discharged from the duct portion 28 to the discharge duct 29.

  Next, the installation structure and power input structure of the transmission case 19 and the traveling transmission relay case 34 will be described with reference to FIGS. As shown in FIGS. 6 and 7, the left side of the front portion of the mission case 19 is fastened to the cradle 45 of the left airframe frame 3 with bolts 46. Similarly, the right side of the front portion of the mission case 19 is fastened to the cradle 47 of the right airframe frame 4 with bolts 48.

  As shown in FIGS. 6 to 8, left and right shift output bearings 19 a for supporting the left and right rear wheel drive shafts 36 protrude from the left and right sides of the rear part of the transmission case 19, respectively. The left and right gearshift output bearings 19a are fastened to the cradle 49 of the body frames 3 and 4 with two transmission mounting bolts 50, respectively. That is, above the discharge duct 29, the body frames 3, 4 of the traveling machine body 1 are inclined in a front, rear, and rear shape along the upper surface of the discharge duct 29, and the front and rear inclined portions of the body frames 3, 4 are arranged. In the middle, the mission case 19 is supported by being inclined in a front-rear-rear-high shape (forward-inclined shape).

  Of the two transmission mounting bolts 50 for fastening the left shift output bearing 19a, the transmission mounting bolt 50a on the front side of the machine body is formed longer than the other transmission mounting bolts 50. A cylinder body 51a and a casing 51b as a spring mounting portion 51 described later are fitted on the head side of the mission mounting bolt 50a on the front side of the machine body. The outer diameter of the casing 51b is formed larger than the outer diameter of the cylindrical body 51a.

  The bearing 19a is fastened by the mission mounting bolt 50a so that the cylindrical body 51a and the housing 51b are sandwiched between the head of the mission mounting bolt 50a and the left shift output bearing 19a. That is, the cylindrical body 51a and the casing 51b are fastened to the cradle 49 by the transmission mounting bolt 50a together with the left shift output bearing 19a.

  On the other hand, as shown in FIGS. 6 to 8, the left and right connecting brackets 2b are fastened to the left and right body frames 3 and 4 with bolts 53, respectively, and both ends of the pipe-shaped horizontal rail frame 2a are connected to the left and right connecting brackets 2b. The parts are connected together. The front side of the traveling transmission relay case 34 is fastened with two bolts 54 to a cradle 52 fixed to the crosspiece frame 2a. Further, the bottom of the traveling transmission relay case 34 is fastened with two bolts 55 to the inner side surface of the left body frame 3 whose end face is a square pipe shape. That is, the traveling transmission relay case 34 is supported in a posture that is inclined forwardly (front low, rear high) on the front end side (inclined lower end side) of the inclined portion in the front-rear direction of the body frames 3 and 4. It will be.

  As shown in FIGS. 7 and 8, the relay input shaft 56 projects forward from the front surface of the transmission relay case 34, and the relay input shaft 56 is connected to the rear end side of the propulsion shaft 33 via the universal joint 33 a. . A relay output shaft 57 protrudes upward from the upper surface of the transmission relay case 34, and a relay pulley 58 that transmits the power of the engine 9 is fitted on the relay output shaft 57. The relay input shaft 56 and the relay output shaft 57 are connected via a bevel gear (not shown) or the like built in the transmission relay case 34.

  A transmission input shaft 59 protrudes upward from the upper surface of the transmission case 19, and a transmission input pulley 61 having an air cooling fan 60 is fitted on the transmission input shaft 59. The relay pulley 58 and the transmission input pulley 61 are disposed on a plane substantially parallel to the body frames 3 and 4.

  A V-belt type input belt 35 is stretched between the relay pulley 58 and the transmission input pulley 61 via a tension roller 62. A fulcrum shaft body 64a projects upward on the top surface of the tip end side of the tension arm 64, and the tension roller 62 is rotatably supported on the fulcrum shaft body 64a. The proximal end side of the tension arm 64 is pivotally supported by the transmission relay case 34 so as to be rotatable around the relay output shaft 57. The tension arm 64 rotates around the relay output shaft 57 below the relay pulley 58.

  A locking shaft body 65 projects downward on the lower surface side of the tension arm 64, and a spring hook 66 a on one end side of the tension spring 66 is connected to the locking shaft body 65. A spring hook 66b on the other end side of the tension spring 66 is connected to the spring mounting portion 51 having the cylindrical body 51a and the casing 51b described above. The spring hook 66b is locked to the cylindrical body 51a. The spring hook 66b is prevented from being detached from the cylindrical body 51a by the housing 51b, and the tension spring 66 is locked and maintained on the spring mounting portion 51. The tension spring 66 is formed by a tension spring.

  With the above configuration, the tension spring 66 extends substantially parallel to the left machine frame 3 and the input belt 35 between the left machine frame 3 and the input belt 35 in a side view. Further, the tension spring 66 extends in a direction crossing the left machine frame 3 and the input belt 35 in a plan view. Then, the tension roller 66 is pressed against the input belt 35 by the tension spring 66, the tension of the input belt 35 is maintained at a set value, and the power from the engine 9 is transmitted via the transmission relay case 34 and the input belt 35. It is reported to the mission case 19. Therefore, the travel driving force shifted from the rear wheel drive shaft 36 of the transmission case 19 is output, the rear wheel 6 is driven by the travel driving force, and the traveling machine body 1 moves forward or backward.

  As shown in FIG. 7 and FIG. 8, the engine 9 mounted on the traveling machine body 1 having the front wheel 3 and the rear wheel 4 as a traveling unit, and the transmission for transmitting the power of the engine 9 to the rear wheel 4 by shifting the power. A case 19, a transmission input belt 35 for inputting power of the engine 9 to the transmission case 19, a tension roller 62 for tensioning the transmission input belt 35, and a tension spring 66 for biasing the tension roller 62 in the tension direction. The work vehicle has a structure in which the transmission case 1 is fastened to the traveling body 1 via the mission mounting bolt 50a, and the transmission mounting portion 50 is provided with a spring mounting portion 51 for locking one end of the tension spring 66. Because there is no need to assemble the spring mounting part 51 in the mission case 19 or the like, the mission mounting Using the belt 50a, the mounting structure of the tension spring 66 can easily configure, and reduces the attachment components of the tension spring 66 can easily perform assembly work and the like.

  As shown in FIGS. 7 and 8, a transmission output bearing portion 19 a of the transmission case 19 is fixed to the upper surface of the traveling aircraft body 1 via a mission mounting bolt 50 a fastened from above, and the bearing portion 19 a Since the head side of the mission mounting bolt 50a protrudes upward and the spring mounting portion 51 is arranged on the head side of the mission mounting bolt 50a, the mission mounting bolt 50a is provided on the upper surface side of the mission case 19. Thus, the tension spring 66 can be easily assembled.

  As shown in FIGS. 7 and 8, the spring mounting portion 51 is formed by the cylindrical body 51 a and the housing 51 b that are fitted on the transmission mounting bolt 66. Cost can be configured.

  As shown in FIGS. 7 and 8, a mower device 16 as a mowing unit disposed on the lower surface side of the traveling machine body 1 and a grass collection box 30 as a grass collecting part disposed behind the traveling machine body 1. The transmission case 29 is extended to convey the cut turf grass, and the transmission case 1 is inclined to the front, low, and back high above the discharge duct 29, and the transmission case 19 is inclined to the front, low, and high. The traveling transmission relay case 34 is disposed on the traveling machine body 1 on the front side of the transmission case 19, and the power of the engine 9 is transmitted to the relay output shaft 57 protruding upward from the upper surface of the traveling transmission relay case 34. A relay pulley 58 is attached, and a speed change input pulley 61 is attached to a speed change input shaft 59 projecting upward on the upper surface of the transmission case 19, and a tension arm 64 that can rotate around the relay output shaft 57 is tensioned. Since the roller 62 is disposed, the tension spring 66 is connected to the tension arm 64, and the speed change input belt 35 is stretched between the speed change input pulley 60 and the relay pulley 58 via the tension roller 62. The mission case 19 can be compactly arranged above the duct 29, and the tension spring 66 can be supported on the traveling machine body 1 with a high rigidity via the mission mounting bolt 50a.

  In addition, with the above configuration, the power of the engine 9 is transmitted to the transmission case 19 by one propulsion shaft 33, and the ventilation cross-sectional area (vertical width dimension and horizontal width dimension) of the discharge duct 29 is set to a predetermined value. In order to ensure the size, the propulsion shaft 33 can be disposed low by the vertical transmission dimension of the transmission relay case 34 in a state where the transmission case 19 is disposed at a high part of the traveling machine body 1. Even if the propulsion shaft 33 is disposed below the floor (step) of the traveling machine body 1 on which the operator who sits on the driver's seat 15 puts his / her foot, the floor (step) of the traveling machine body 1 can be formed low. . Therefore, the power transmission mechanism to the transmission case 19 can be simply configured, the large discharge duct 29 is arranged at the center of the left and right width of the traveling machine body to facilitate the discharge of the cut grass to the rear, and There is an effect that the operator can easily get on and off the driver seat 15 at the same time.

  Further, the above-described hydraulic oil in the oil tank 21 is supplied to the continuously variable transmission 100 built in the mission case 19 through the charge oil pipe 70. A bypass lever 71 for maintaining the rotation of the output side (hydraulic motor) of the continuously variable transmission 100 at substantially zero regardless of whether the input side (hydraulic pump) of the continuously variable transmission 100 is rotated or not. It is disposed on the upper surface of the mission case 19 (see FIG. 6). That is, by switching the bypass lever 71, the input side (hydraulic pump) of the continuously variable transmission 100 can be short-circuited, and the output side (hydraulic motor) of the continuously variable transmission 100 can be unloaded.

  One end side of a switching lever 72 that switches the bypass lever 71 is connected to the bypass lever 71. The other end side of the switching lever 72 extends between the left and right body frames 3 and 4 at the rear end portions thereof (see FIG. 6). For example, when the rear wheel 6 cannot be driven by the power of the engine 9 due to a failure such as the lack of fuel in the fuel tank 20, the grass collection box 30 is removed from the traveling machine 1, and the operator pulls the switching lever 72. By switching the bypass lever 71, the continuously variable transmission 100 in the mission case 19 is kept in an unloaded state, and the operator can move by pushing the traveling machine body 1.

  Note that the continuously variable transmission 100 in the transmission case 19 can be returned to the operating state by the operator pressing the switching lever 72 and returning the bypass lever 71 to the initial position.

  Next, referring to FIGS. 7 and 8, the protection structure of the connecting portion between the relay input shaft 56 and the propulsion shaft 33 of the traveling transmission relay case 34 will be described. A first protective cover body 80 made of sheet metal bent into an L shape in front view is provided. The first protective cover body 80 has a vertical wall 80a and a horizontal wall 80b, and is formed in an L shape in which the left edge of the horizontal wall 80b is connected to the upper edge of the vertical wall 80a.

  The lower end side of the vertical wall 80 a is bent and extended on the upper surface of the left airframe frame 3, and the lower end side of the vertical wall 80 a is fastened to the upper surface of the left airframe frame 3 with a bolt 53. Further, the rear end side of the horizontal wall 80 b is fastened to the cradle 52 described above with a bolt 54. The upper surface side and the left side surface side of the universal joint 33 a for connecting the relay input shaft 56 and the propulsion shaft 33 are blocked by the first protective cover body 80.

  On the other hand, as shown in FIGS. 7 and 8, a second protective cover body 82 made of sheet metal for closing the right side surface of the universal joint 33 a is provided. The second protective cover body 82 is formed by a vertical wall standing on the right side of the universal joint 33a, and the rear end side of the L-shaped second view of the second protective cover body 82 is fastened to the cradle 52 with bolts 54. . That is, the transmission relay case 34, the first protective cover body 80, and the second protective cover body 82 are fastened to the pedestal 52 with the bolts 54. The connection bracket 2 b and the first protective cover body 80 are fastened with bolts 53. Therefore, since the first protective cover body 80 and the second protective cover body 82 are fixed using the bolts 53 and 54 for attaching other parts, the first protective cover body 80 and the second protective cover body. When assembling 82, it is not necessary to provide a support member and a mounting bolt for the first protective cover body 80 or the second protective cover body 82 in particular.

  With the above configuration, the upper surface side, the left side surface side, and the right side surface side of the universal joint 33a are blocked by the first protective cover body 80 and the second protective cover body 82. While the propulsion shaft 33 is rotated by the power of the engine 9, even if the propulsion shaft 33 is detached from the relay input shaft 56 due to damage to the universal joint 33a or the like, the propulsion shaft 33 moves upward or left and right. It can be blocked by the first protective cover body 80 and the second protective cover body 82. Therefore, it is possible to prevent the propulsion shaft 33 from colliding with the upper or left and right side components and damaging the components.

  With reference to FIG. 9 thru | or FIG. 11, the electrical wiring structure of the traveling body 1 is demonstrated. An electrical cable 81 for electrically connecting an electrical component such as the engine 9 or the steering column portion 11 at the front of the traveling machine body 1 and the battery 22 at the rear of the traveling machine body 1 is provided. The middle of the electric cable 81 extends along the left body frame 3. A plurality of cable clamps 83 are fixed to the upper surface of the left body frame 3, and the middle of the electric cable 81 is locked to each cable clamp 83.

  As shown in FIGS. 9 and 10, a cable clamp 85 is fastened to the left side surface (the left side surface in the traveling direction) of the transmission relay case 34 with a bolt 84, and the electric cable 81 is intermediate to the cable clamp 85. Is locked. The electric cable 81 is extended so as to bypass the upper side of the crosspiece frame 2a, and the middle of the electric cable 81 is locked to the upper surface of the left body frame 3 on the left side of the first protective cover body 80 via a cable clamp 83. is doing.

  That is, in the state where the cross rail frame 2a is fastened to the upper surface of the left airframe frame 3 by the bolt 53 via the connection bracket 2b, the electric cable is connected to the upper surface side of the left airframe frame 3 and the left side surface side of the transmission relay case 34. The middle of 81 is assembled. The middle of the electric cable 81 is extended to the upper surface side of the left body frame 3 and the left side surface of the transmission relay case 34. The middle of the electric cable 81 can be arranged using the highly rigid left body frame 3 and the transmission relay case 34.

  Further, since the first protective cover body 80 is disposed between the propulsion shaft 33 and the relay input shaft 56 and the middle of the electric cable 81 on the upper surface side of the left body frame 3, for example, the middle of the electric cable 81 is a cable clamp. Even if it deviates from 83, the first protective cover body 80 can prevent the middle of the electric cable 81 from coming into contact with or wound around the propulsion shaft 33 or the relay input shaft 56.

  As is clear from the above description and FIGS. 9, 10, and 11, the engine 9 mounted on the front portion of the traveling machine body 1 including the front wheel 5 and the rear wheel 6 as the traveling portion, and the engine 9 is started. And a transmission case 19 for shifting the power of the engine 9 and transmitting it to the front wheels 5 and the rear wheels 6. The battery 22 disposed at the rear of the traveling machine body 1 is electrically connected to the front side of the traveling machine body 1. In a work vehicle in which the cable 81 is extended, a first shaft is provided between the propulsion shaft 33 as a transmission mechanism for transmitting the power of the engine 9 to the transmission case 19 and the electric cable 81 extended along the traveling machine body 1. Since the protective cover body 80 is disposed, the propulsion shaft 33 and the electric cable 81 can be easily disposed close to each other by using the body frame 3 that forms the traveling body 1, and the propulsion body 33 can be easily disposed. The shaft 33 can easily be prevented electrical cables 81 that wrap electrical cable 81 can be prevented from being broken or short damaged.

  As is clear from the above description and FIGS. 1, 9, 10, and 11, the mower device 16 as a mowing unit disposed on the lower surface side of the traveling machine body 1 and the grass collecting unit disposed behind the traveling machine body 1. An exhaust duct 29 for conveying the cut grass is extended between the grass box 30 and the body frame 3 of the traveling machine body 1 that is inclined above and below the exhaust duct 29 in a front, a rear, and a height. , 4, the transmission case 19 is supported by being inclined in a front-rear, rear-and-height shape, the transmission relay case 34 is disposed on the body frame 3 on the front side of the transmission case 19, and protrudes forward in front of the transmission relay case 34 A structure in which a propulsion shaft 33 as a transmission mechanism for transmitting the power of the engine 9 is connected to the relay input shaft 56, and a first protective cover body 80 is connected to the body frame 3 and the transmission relay case 34, First protective cover body 8 Since the electric cable 81 is configured to extend to the side of the relay input shaft 56 with the gap therebetween, the transmission relay case 34 can be easily assembled using the highly rigid body frame 3, and The first protective cover body 80 can be used as a reinforcing material for supporting the transmission relay case 34 on the machine body frame 3, and the support strength of the transmission relay case 34 can be easily improved.

  As is clear from the above description and FIGS. 9, 10, and 11, the transmission relay case 34 and the first protective cover body 80 are connected to the body frame 3 by bolts 54 for fastening the transmission relay case 34. Therefore, it is not necessary to separately fasten the transmission relay case 34 and the first protective cover body 80 to the body frame 3, and the assembly workability of the transmission relay case 34 and the first protective cover body 80 can be easily improved. .

  As apparent from the above description and FIGS. 9, 10, and 11, the vehicle body frame 3 and the first protective cover are provided with the horizontal frame 2 a as a support frame for connecting the transmission relay case 34 to the vehicle body frame 3. Since the body 80 is connected to the body frame 3 by bolts 53 for fastening the crosspiece frame 2a, it is necessary to fasten the crosspiece frame 2a and the first protective cover body 80 to the body frame 3 separately. Thus, the assembly workability of the horizontal rail frame 2a and the first protective cover body 80 can be easily improved.

It is the whole lawn mower side view. It is the same top view. It is a side view of the traveling body of a lawn mower. It is a top view of the traveling body. It is an enlarged side view of the second half part of the traveling machine body. It is an enlarged plan view of the latter half part of the traveling machine body. It is a side view of the attaching part of the mission case. It is a top view of the attaching part of the mission case. It is the elements on larger scale of FIG. FIG. 10 is an explanatory diagram taken along line II in FIG. 9. FIG. 9 is a partially enlarged explanatory view of FIG. 8.

Explanation of symbols

1 Traveling machine body 2a Horizontal beam frame (support frame)
3, 4 Airframe frame 5 Front wheel (traveling part)
6 Rear wheels (traveling part)
9 Engine 16 Mower device (mowing unit)
19 Mission case 29 Exhaust duct 30 Weed collection box (collection section)
33 Propulsion shaft (transmission mechanism)
34 Transmission relay case 53, 54 bolt 56 Relay input shaft 80 First protective cover 81 Electrical cable

Claims (4)

An engine mounted on a front portion of a traveling machine body including a traveling unit; a battery that starts the engine; and a transmission case that shifts power of the engine and transmits the engine power to the traveling unit. In a work vehicle formed by extending an electric cable from the arranged battery to the front side of the traveling aircraft body,
A work vehicle characterized in that a protective cover body is disposed between a transmission mechanism that transmits power of the engine to the transmission case and the electric cable extended along the traveling machine body. Between the grass cutting part disposed on the lower surface side of the traveling machine body and a grass collecting part disposed on the rear side of the traveling machine body, a discharge duct for conveying the cut grass is extended.
On the body frame of the traveling aircraft that is inclined to the front low rear height above the discharge duct, the mission case is supported to be inclined to the front low rear height,
A transmission relay case is disposed on the airframe frame on the front side of the transmission case, and a propulsion shaft as a transmission mechanism for transmitting the power of the engine is connected to a relay input shaft protruding forward on the front surface of the transmission relay case. ,
The protective cover body is connected to the machine body frame and the transmission relay case, and the electric cable is extended to the side of the relay input shaft with the protective cover body interposed therebetween. The work vehicle according to claim 1.   The work vehicle according to claim 2, wherein the transmission relay case and the protective cover body are connected to the machine body frame by a bolt for fastening the transmission relay case.   A support frame for connecting the transmission relay case to the machine frame is provided, and the machine frame and the protective cover body are connected by a bolt for fastening the support frame to the machine frame. The work vehicle according to claim 2.

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