JP2005313682A - Manual braking operation member and working vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a manual brake operation member which is applied to the working vehicle provided with a brake mechanism and a brake operation mechanism and in which not only a healthy individual but also an individual with trouble in the leg can perform brake pedal operation of the working vehicle, and a working vehicle equipped with it. <P>SOLUTION: The manual brake operation member applied to the working vehicle provided with a brake mechanism and a brake operation mechanism can operate the brake pedal in response to a driver's manual operation. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention is applied to a work vehicle including a brake mechanism that operatively applies a braking force to a traveling transmission path from a drive source to a drive wheel, and a brake operation mechanism including a brake pedal for operating the brake mechanism. The present invention relates to a manual brake operation member and a work vehicle including the same.

A working vehicle such as a tractor generally includes a brake mechanism that operatively applies a braking force to a traveling system transmission path from a driving source to driving wheels, and a clutch mechanism that is inserted in the traveling system transmission path. A brake operation mechanism including a brake mechanism operation brake pedal, and a clutch operation mechanism including a clutch mechanism operation clutch pedal. In addition to operations performed by hand (for example, handle operation, various lever operations such as main-sub-shift operation, PTO gear-shift operation, accelerator operation, etc.) that are performed in order to run the work vehicle, operations performed with feet (For example, a main clutch pedal depression operation, a brake pedal depression operation, etc.) (for example, refer to Patent Document 1).
Japanese Patent Laid-Open No. 11-315992

  However, in the conventional work vehicle, as shown in Patent Document 1, the operation performed for running the work vehicle is performed by an operation tool operated by a foot, and there is an operation tool operated by other than the foot. The fact is not. Therefore, it has been difficult (substantially impossible) for people with disabilities such as handicapped persons to get on work vehicles such as tractors and work.

  The present invention has been made in view of the above prior art, and includes a brake mechanism that operatively applies a braking force to a traveling system transmission path from a drive source to a drive wheel, and a brake mechanism operation brake pedal. A manual brake operation member applied to a work vehicle provided with an operation mechanism, wherein a manual brake operation member capable of operating a brake pedal of the work vehicle not only by a healthy person but also by a handicapped person is provided. The issue is to provide.

  The present invention also provides a work vehicle including a brake mechanism that operatively applies a braking force to a traveling system transmission path from a drive source to a drive wheel, and a brake operation mechanism including a brake pedal for operating the brake mechanism. Therefore, it is an object of the present invention to provide a working vehicle in which not only a healthy person but also a person with a disability can perform a brake pedal operation.

  In order to solve the above problems, the present invention provides a brake mechanism that operatively applies a braking force to a traveling system transmission path from a drive source to a drive wheel, and a brake operation mechanism that includes a brake pedal for operating the brake mechanism. There is provided a manual brake operation member applied to a work vehicle equipped with a manual brake operation member capable of operating the brake pedal according to a driver's manual operation.

  In order to solve the above-mentioned problems, the present invention also provides a brake mechanism that operatively applies a braking force to a traveling system transmission path from a drive source to a drive wheel, and a brake mechanism operation brake pedal. And a manual brake operation member capable of operating the brake pedal according to a driver's manual operation is also provided.

  In the manual brake operation member and the work vehicle according to the present invention, since the manual brake pedal operation member can operate the brake pedal according to a driver's manual operation, a healthy person operates the brake pedal with a foot or a hand. Of course, a person with a disability such as a handicapped person can also operate the brake pedal by hand.

  The manual brake operation member may be detachably provided on the work vehicle. By doing so, it is possible to install the work vehicle in an existing work vehicle without developing a work vehicle having a special specification, and to improve the maintainability when replacing the manual brake operation member. Moreover, when this manual brake operation member is comprised with the several member, you may unitize this structural member in one unit. In this case, the assembling property of the respective components of the manual brake operation member is improved, and thereby the maintenance property is further improved.

  The brake operation mechanism may be configured such that the brake pedal can take a brake release position (initial position) and a brake operation position by operating the brake pedal. In this configuration, for example, the brake pedal is always urged toward the brake release position, and the driver depresses the brake pedal against the urging force and is positioned at the brake operation position. The brake mechanism is turned on. When the stepping operation by the driver is released, the brake pedal is automatically returned to the brake release position, and the brake mechanism is turned off. Here, the case where the said manual brake operation member is provided in the said working vehicle so that rocking | fluctuation along the vehicle front-back direction can be illustrated. In this case, for example, when a pulling operation to the rear of the vehicle is performed by a person with reduced mobility, the upper body falls forward because the foot is inconvenient and cannot be strung, and this does not force well, The operability is likely to deteriorate.

  Therefore, it is preferable that the manual brake operation material is configured to position the brake pedal at a brake operating position by a push operation forward of the vehicle. In this configuration, the back of the seat can be used by pushing the vehicle forward, which makes it easier to stabilize the posture of the upper body, and even for people with reduced mobility Therefore, the operability is improved accordingly. In this case, it is preferable that the manual brake operation member can be disposed on one side in the vehicle width direction of a steering handle provided in the work vehicle. In this configuration, it is possible to immediately shift from the handle operation with the hand of the steering handle to the brake pedal operation with the hand of the manual brake operation member, and the operability is improved accordingly. At this time, it is preferable that the manual brake operation member has a swing range within a vehicle front-rear width of the steering handle. By doing so, the swing range of the manual brake operation member is within the vehicle front-rear width of the steering handle, and the operability is improved accordingly.

  The manual brake operation member includes a pedal engaging portion connected to the brake pedal and a gripping portion gripped by a driver, and the relative position of the gripping portion with respect to the pedal engaging portion is adjustable. It may be. In this case, the connection angle of the pedal engagement portion to the brake pedal in the manual brake operation member may be changeable so that the relative position of the grip portion with respect to the pedal engagement portion can be adjusted. The manual brake operation member may be composed of at least two operation members, and the at least two operation members may be connected to each other so that the relative position of the grip portion with respect to the pedal engaging portion can be adjusted. By doing so, the gripping position of the gripping part can be adjusted to a desired position according to the height of the driver, the length of the arm, and the like. Thereby, regardless of the driver's body shape, ease of use can be ensured, and operability can be improved accordingly.

  As a preferred aspect of the working vehicle according to the present invention, the brake pedal is supported in a swingable manner around the first pivot shaft along the vehicle width direction, and extends rearward and downward from the base end portion. A base end portion having an arm portion and a stepping portion provided at a distal end portion of the arm portion, wherein the manual brake operation member is swingably supported around a second pivot shaft along the vehicle width direction. And a gripping part gripped by the driver, and a pedal engaging part connected to the brake pedal between the base end part and the gripping part, the pedal engaging part being more than the stepping part Further, a mode of being operatively connected to the arm portion of the brake pedal in front of the vehicle can be exemplified.

  In this working vehicle, for example, when the pedal engaging portion and the arm portion are engaged while sliding with each other, the pedal engaging portion and the arm portion are engaged via a rolling member. It is preferable that Thus, the operation force of the manual brake operation member can be reduced by engaging the pedal engaging portion and the arm portion via the rolling member. In this case, when the manual brake operation member is provided so that a fulcrum position supported by the one end is positioned above the pedal engagement portion of the brake pedal in a vertical direction orthogonal to the vehicle traveling direction, If it is left as it is, it will be a pulling operation to the rear of the vehicle, and as described above, the force is not applied well and the operability tends to be lowered. Therefore, in order to make this a push operation forward of the vehicle, a connecting mechanism such as an intermediate link member is required separately, which complicates the structure.

  From this point of view, the manual brake operation member is located at a position where the fulcrum position supported by the work vehicle at the one end portion is below the pedal engaging portion, more specifically below the brake pedal, in the vertical direction perpendicular to the traveling direction. Thus, it is preferable to be provided in the working vehicle. By doing this, the pushing operation is performed with a simple structure, and as described above, the posture of the upper body is easily stabilized, and thus it is possible to put effort well even for people with reduced mobility. Therefore, the operability is improved.

  Further, in the work vehicle configured such that the fulcrum position of the manual brake operation member is located below the brake pedal, the work vehicle is a support member that supports the second pivot shaft, and the step of the work vehicle. It is preferable that a support member mounted on the flat portion is provided. In this work vehicle, the manual brake operation member can be supported at one end by the support member attached to the step flat portion of the work vehicle. Accordingly, the one end portion of the manual brake operation member can be easily supported by the support member.

  As described above, according to the present invention, the brake mechanism that operatively applies the braking force to the traveling system transmission path from the drive source to the drive wheel, and the brake operation mechanism including the brake pedal for operating the brake mechanism are provided. A manual brake operation member applied to a working vehicle, which can be operated not only by a healthy person but also by a handicapped person, can operate the brake pedal of the work vehicle. .

  In addition, according to the present invention, a working vehicle including a brake mechanism that operatively applies a braking force to a traveling system transmission path from a drive source to a drive wheel, and a brake operation mechanism including a brake pedal for operating the brake mechanism. In addition, it is possible to provide a working vehicle that can be operated not only by a healthy person but also by a handicapped person.

  Further, when the manual brake operation member is detachably provided on the work vehicle, the manual brake operation member can be attached to an existing work vehicle without developing a special specification work vehicle. Good maintainability when exchanging the members.

  Further, when the manual brake operation material is configured to position the brake pedal at a brake operating position by pushing the vehicle forward, the seat back or the like is used by pushing the vehicle forward. Thus, the posture of the upper body can be easily stabilized, and even a person with a reduced mobility can put effort well and the operability is improved accordingly. In such a configuration, when the manual brake operation member can be disposed on one side in the vehicle width direction of the steering handle provided in the work vehicle, the steering brake is immediately after the steering operation with the hand of the steering handle. It is possible to shift to the brake pedal operation with the hand of the manual brake operation member, and the operability is improved accordingly. Further, when the swing range of the manual brake operation member is within the vehicle front-rear width of the steering handle, the swing range of the manual brake operation member is within the vehicle front-rear width of the steering handle. Therefore, the operability is improved. The manual brake operation member has a pedal engaging portion connected to the brake pedal and a gripping portion gripped by a driver, and the relative position of the gripping portion with respect to the pedal engaging portion is adjustable. In this case, the gripping position of the gripping part can be adjusted to a desired position according to the driver's height, arm length, and the like. Thereby, regardless of the driver's body shape, ease of use can be ensured, and operability can be improved accordingly.

  The brake pedal is supported in a swingable manner around the first pivot shaft along the vehicle width direction, an arm portion extending rearward and downward from the base end portion, and a distal end of the arm portion A base end portion supported by the driver so as to be swingable about a second pivot shaft along the vehicle width direction, and a grip gripped by the driver And a pedal engaging portion connected to the brake pedal between the base end portion and the gripping portion, the pedal engaging portion being in front of the stepping portion and the vehicle, In the configuration in which the arm portion is operatively connected, for example, when the pedal engaging portion and the arm portion are engaged via a rolling member, the pedal engaging portion and the arm portion are Since it is engaged via a rolling member, the manual It is possible to reduce the operation force of the rake operating member. In this configuration, the manual brake operation member is positioned at a position where the fulcrum position supported by the work vehicle at the one end portion is below the pedal engaging portion, more specifically below the brake pedal, in a vertical direction perpendicular to the traveling direction. As described above, when the work vehicle is provided, the push operation is performed with a simple structure, and the posture of the upper body is easily stabilized. And the operability is improved accordingly.

  Further, in the work vehicle configured such that the fulcrum position of the manual brake operation member is located below the brake pedal, the work vehicle is a support member that supports the second pivot shaft. In the case where a support member mounted on the flat portion is provided, the manual brake operation member can be supported by the support member mounted on the step flat portion of the work vehicle at one end. Accordingly, the one end portion of the manual brake operation member can be easily supported by the support member.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a side view of a working vehicle to which a manual clutch operation member according to the present embodiment is applied, FIG. 2 is a plan view of the vehicle, and FIG. 3 is a skeleton diagram showing a power transmission configuration of the vehicle. It is. FIG. 4 is a front view of a main part including a partial cross section in a state where the manual clutch operating member and the manual brake operating member are provided, and FIG. 5 is a schematic view showing an operating state of the manual clutch operating member shown in FIG. FIG. 6 is a schematic side view showing an operating state of the manual brake operation member shown in FIG.

  The working vehicle 200 is a tractor in the present embodiment, and as shown in FIGS. 1 and 2, the driving force from the engine 5 as a driving source is applied to one side and the other side in the vehicle longitudinal direction (X direction in the figure). It is comprised so that it can transmit to a pair of steering wheel and a pair of non-steering wheel which are each arrange | positioned. In the present embodiment, the front wheel 1 is a steered wheel and the rear wheel 2 is a non-steered wheel.

  In this working vehicle 200, the front wheel 1 and the rear wheel 2 are supported on the front and rear of the machine, and the engine 5 is disposed inside the hood 6 at the front of the machine. A dashboard is arranged behind the bonnet 6, a display panel 7 and a steering handle 10 are provided on the dashboard, and a seat 11 is provided behind the steering handle 10.

  A reverser lever 71 that switches between forward and backward movement is disposed on the dashboard in the vicinity of the steering handle 10 so as to protrude laterally from the dashboard, and an accelerator lever 72 protrudes on the opposite side of the reverser lever 71. In the vicinity of the seat 11, a main speed change lever 77, a sub speed change lever, a PTO lever, an elevating lever, a 2WD / 4WD switching lever (or a 2WD / 4WD switching switch), etc. are provided.

  A clutch housing 8 is disposed at the rear part of the engine 5, a transmission case 9 is disposed at the rear part of the clutch housing 8, and power from the engine 5 is transmitted to the rear wheel 2 to drive the rear wheel 2. . Further, the driving force can be simultaneously transmitted from the transmission case 9 to the front wheels 1 via a two-wheel / four-wheel drive switching mechanism 79 described later.

  Further, in this vehicle 200, the driving force of the engine 5 is transmitted to the PTO shaft 15 protruding from the rear end of the transmission case 9, and the working machine is attached to the rear end of the vehicle body via a universal joint or the like (not shown) from the PTO shaft 15. It is comprised so that the work machine 100 (refer FIG. 3) with which it was mounted | worn may be driven. A clutch mechanism operating clutch pedal 16 for connecting and disconnecting the main clutch, left and right brake mechanism operating brake pedals 17a and 17b, and the like are disposed in front and lower of the seat 11. Further, a manual clutch operation member 300 is provided on the left side of the steering handle 10, and a manual brake operation member 400 is provided on the right side. That is, the manual clutch operation member 300 and the manual brake operation member 400 are arranged so as to be distributed with the steering handle 10 therebetween in the vehicle width direction (Y direction in the figure).

  Prior to describing the manual clutch operation member 300 and the manual brake operation member 400, first, a clutch inserted in a traveling system transmission path from the engine 5 as a drive source to the front wheels 1 and the rear wheels 2 as drive wheels. A mechanism, a brake mechanism that operatively applies a braking force to the traveling system transmission path, and a PTO transmission mechanism for extracting power to the outside will be described in order with reference to FIG. A clutch operation mechanism including the clutch pedal 16 and a brake operation mechanism including the left and right brake mechanism operation brake pedals 17a and 17b will be described with reference to FIGS.

(Clutch mechanism)
In FIG. 3, a multi-plate main clutch 21 is accommodated in the clutch housing 8 and linked to the clutch pedal 16. The rotation of the output shaft (crankshaft) 22 of the engine 5 is input to the main clutch 21. The output shaft 23 of the main clutch 21 extends rearward of the machine body, and the gear 23a formed at the rear end thereof has a main shaft 23a. A main transmission fourth speed gear 34 loosely fitted on the transmission shaft 24 is engaged. The main transmission fourth speed gear 34 is further engaged with a transmission gear 44 fixed to the main shaft 25. Three transmission gears 41, 42, 43 are fixed or formed on the main shaft 25, and are loosely fitted to the main transmission shaft 24 via the three transmission gears 41, 42, 43, respectively. Power is transmitted to the main transmission first speed gear 31, main transmission second speed gear 32, and main transmission third speed gear 33. Further, hydraulic clutches 51, 52, 53, 54 are arranged between the main transmission shaft 24, the main transmission first speed gear 31, the main transmission second speed gear 32, the main transmission third speed gear 33, and the main transmission fourth speed gear 34, respectively. The hydraulic clutches 51, 52, 53, 54 are connected to a hydraulic control valve that can be switched by operating a main transmission lever 77 (see FIGS. 1 and 2) and can be connected and disconnected.

  Accordingly, when the output shaft 23 of the main clutch 21 rotates, the main transmission first speed gear 31, the main transmission second speed gear 32, the main transmission third speed gear 33, and the main transmission fourth speed gear 34 rotate at different rotational speeds. Become. A hydraulic control valve is linked to the main transmission lever 77 through a link or the like, and any one of the four hydraulic clutches 51, 52, 53, 54 is selected by operating the main transmission lever 77. ”, Four stages of speed change are possible, and the main transmission 75 is constituted, and the post-shift rotation from the main shaft 25 is transmitted to the main transmission shaft 24.

  The main transmission shaft 24 extends rearward, and a forward / reverse switching device 76 (forward / reverse rotation mechanism) is formed in the extended portion, and the forward rotation side gear 26 and the reverse rotation side gear 27 are respectively loosely fitted on the same axis. The A forward hydraulic clutch 56 and a reverse hydraulic clutch 57 are disposed between the main transmission shaft 24 and the forward rotation gear 26 and the reverse rotation gear 27, respectively. The forward hydraulic clutch 56 and the reverse hydraulic clutch 57 is connected or disconnected by switching a hydraulic control valve linked to the reverser lever (forward / reverse switching lever) 71 (see FIGS. 1 and 2).

  Thus, the hydraulic control valve is switched by operating the reverser lever 71, and either the forward-side reverser hydraulic clutch 56 or the reverse-side reverser hydraulic clutch 57 is selected and connected, and the rotation of the main transmission shaft 24 is rotated in the forward direction. It is transmitted to either the side gear 26 or the reverse side gear 27. However, when the reverser lever 71 is in the neutral position, the rotation is not transmitted to either of the gears 26 and 27.

  The forward rotation side gear 26 is connected to the auxiliary transmission shaft 35 so as not to be relatively rotatable, and simultaneously meshes with a transmission gear 37 fixed to the creep transmission shaft 36, and transmits the rotation to both shafts 35, 36. . The reverse gear 27 meshes with a gear 39 formed at one end of the counter shaft 38, and the gear 40 formed at the other end of the counter shaft 38 is fixed to the creep transmission shaft 36. Engage with the transmission gear 37. Therefore, the rotation of the reverse gear 27 causes the creep transmission shaft 36 to rotate in the reverse direction via the counter shaft 38. Further, the auxiliary transmission shaft 35 connected to the transmission gear 37 of the creep transmission shaft 36 is rotated in the reverse direction via the forward rotation gear 26.

  A sub-transmission mechanism and a creep transmission mechanism are provided at the rear portion of the sub-transmission shaft 35, and a sub-transmission second shaft 45 is disposed on the same axis on the rear extension of the sub-transmission shaft 35 so as to be freely rotatable. A creep transmission gear 46 is loosely fitted to the transmission second shaft 45. The creep transmission gear 46 meshes with a gear 47 formed on the creep transmission shaft 36. An input clutch slider 91 is spline-fitted to the auxiliary transmission second shaft 45 so as to be slidable in the axial direction, and is linked to a creep transmission lever (not shown).

  Therefore, the input clutch slider 91 is engaged with either the sub transmission shaft 35 or the creep transmission gear 46 by the operation of the creep transmission lever, so that the rotation can be transmitted to the sub transmission second shaft 45. That is, depending on the selection based on the sliding of the input clutch slider 91, either the rotation of the auxiliary transmission shaft 35 or the rotation of the auxiliary transmission shaft 35 through the creep transmission by the creep transmission shaft 36 is input to the auxiliary transmission second shaft 45. Is done.

  Further, an output shaft 48 is pivotally supported by the transmission case 9 in parallel with the auxiliary transmission second shaft 45, and two transmission gears 49 and 50 are fixed to the output shaft 48. The transmission gears 49 and 50 mesh with two transmission gears 59 and 60 that are loosely fitted to the auxiliary transmission second shaft 45 to constitute an auxiliary transmission mechanism. An output clutch slider 92 is spline-fitted to the auxiliary transmission second shaft 45 so as to be slidable in the axial direction. The output clutch slider 92 is linked to an unillustrated auxiliary transmission lever.

  Accordingly, the output clutch slider 92 is slid by the operation of the auxiliary transmission lever and meshes with one of the two transmission gears 59, 60, and the rotation of the auxiliary transmission second shaft 45 is rotated by the two transmission gears 59, 60. It is possible to communicate to either. Accordingly, the rotation of the sub-transmission second shaft 45 is output through a two-stage shift and is input to the output shaft 48 by selection based on the sliding of the output clutch slider 92.

  A rear wheel differential device 66b is disposed at the rear part of the transmission case 9, and the rotation of the output shaft 48 is input to the rear wheel differential device 66b via a bevel gear 20 formed at the rear end thereof. The rear wheel 2 is driven via an axle, a transmission gear and the like. Reference numeral 96 is a brake device.

(Brake mechanism)
The brake device 96 can apply an individual or integrated braking force directly or indirectly to the pair of main drive shafts to which the driving force from the driving source 5 is branched and transmitted based on a selective external operation. In this embodiment, the brake mechanism configured as described above is provided with left and right rear wheel brake mechanisms that can individually apply braking force to the left and right rear wheel drive shafts.

(PTO transmission mechanism)
Next, the PTO transmission system will be described. That is, a PTO clutch shaft 29 is arranged in front of the transmission case 9 in parallel with the main shaft 25. The PTO clutch shaft 29 has four PTO transmission gears, that is, a PTO first gear 61, a PTO second gear. The gear 62, the PTO third speed gear 63, and the PTO fourth speed gear 64 are loosely fitted. The PTO transmission gears 61, 62, 63, 64 mesh with the four transmission gears 41, 42, 43, 44 fixed or formed on the main shaft 25, and the PTO transmission gears are rotated by the rotation of the main shaft 25. 61, 62, 63 and 64 are rotated at different rotational speeds.

  Further, a PTO reverse rotation gear 65 is loosely fitted to the PTO clutch shaft 29, and the PTO reverse rotation gear 65 is meshed with the main transmission first speed gear 31 loosely fitted to the main transmission shaft 24. . That is, the main transmission first speed gear 31 also serves as an idle gear of the PTO reverse rotation imparting mechanism.

  Further, two PTO clutch sliders 93 and 94 are spline-fitted to the PTO clutch shaft 29 so as to be slidable in the axial direction. The PTO clutch sliders 93 and 94 are linked to a PTO shift lever (not shown). Therefore, the rotation of the main shaft is transmitted to the PTO shaft 15 after undergoing four stages of speed change by the selection based on the sliding of both the PTO clutch sliders 93 and 94. Further, the rotation of the main shaft 25 is forward / reversely converted and transmitted to the PTO clutch shaft 29 via the main transmission first speed gear 31 and the PTO reverse rotation gear 65. In other words, a forward four-speed rotation and a first reverse rotation are performed between the shafts 25 and 29. The PTO clutch shaft 29 is connected to the PTO shaft 15 so as not to be relatively rotatable. The PTO shaft 15 extends rearward and drives the work machine 100 connected to the rear end of the work vehicle.

  Here, driving to the front wheels is performed as follows. That is, a pipe-like front wheel input shaft 55 is fitted on the PTO shaft 15 so as to be free to rotate, and the front wheel drive output shaft 30 is pivotally supported in parallel with the front wheel input shaft 55. An input gear 67 is fixed to the front wheel input shaft 55, and the input gear 67 meshes with a transmission gear 49 fixed to an output shaft 48 disposed in the middle of a transmission system for driving the rear wheel 2. ing. Gears 18 and 19 are fixed on the front wheel input shaft 55, and the gears 18 and 19 mesh with a front wheel drive input gear 69 and a front wheel drive speed increasing gear 70 that are loosely fitted on the front wheel drive output shaft 30. Between the front wheel drive input gear 69, the front wheel drive speed increasing gear 70, and the front wheel drive output shaft 30, a four wheel drive clutch 73 and a speed increase clutch 74, which are hydraulic clutches for the front drive, are respectively disposed, thereby driving two wheels and four wheels. A switching mechanism 79 is configured. The front portion of the front wheel transmission shaft 14 connected to the front end of the front wheel drive output shaft 30 is input to the front wheel side differential device 66a via a universal joint or the like, and the front wheel 1 is connected to the front wheel 1 via the axle, transmission gear, etc. Drive.

(Clutch operating mechanism)
The clutch operating mechanism is configured such that the clutch mechanism operating clutch pedal 16 can take a clutch operating position (initial position) and a clutch releasing position by operating the clutch pedal. A unit 165 and a clutch release shaft 166 for operating the clutch mechanism are provided.

  As shown in FIGS. 4 and 5, the clutch pedal 16 has a base end portion (hereinafter referred to as a clutch base end) supported so as to be swingable around a first pivot shaft (hereinafter referred to as a brake shaft) 171 along the vehicle width direction Y. 162), an arm portion (hereinafter referred to as a clutch arm portion) 163 extending rearward and downward from the clutch base end portion 162, and a stepping portion (hereinafter referred to as a clutch stepping portion) provided at the distal end portion of the clutch arm portion 163 164. The clutch stepping portion 164 extends to the left and right outside from the clutch arm portion 163. The brake shaft 171 is horizontally provided in the clutch housing 8 so as to be rotatable in the vehicle width direction Y. The clutch base end portion 162 has a clutch lever 162a and is rotatably fitted to the brake shaft 171.

  The clutch release shaft 166 is disposed on the left side of the clutch housing 8 in the vehicle width Y direction, and the clutch rod unit 165 is rotatably connected to a clutch lever 162a provided at the clutch base end 162 at one end. In addition, the other end is rotatably connected to the clutch release shaft 166.

  In this clutch operation mechanism, one end of the clutch pedal 16 is hooked on a link plate 81 provided in the clutch housing 8, and the other end is hooked on a protruding portion 163 ′ of the clutch arm portion 163. The return spring 82 is always urged toward the clutch operating position, and the driver depresses the clutch pedal 16 against the urging force so that the clutch is positioned at the clutch release position. The mechanism is in the clutch “disengaged” state. When the stepping operation by the driver is released, the clutch pedal 16 is automatically returned to the clutch operating position, and the clutch mechanism enters the clutch “ON” state.

  More specifically, when the clutch pedal 16 is depressed by the clutch depressing portion 164, the clutch base end portion 162 is rotated clockwise as shown in FIG. 162a swings upward in a vertical direction (Z direction in the figure) perpendicular to the vehicle longitudinal direction X, and the clutch rod unit 165 shifts upward. As a result, the clutch release shaft 166 rotates clockwise to engage the clutch. The mechanism is released. Further, when the depression pressure operation of the clutch pedal 16 is released, the clutch base end portion 162 rotates counterclockwise as shown in FIG. 5B, and accordingly the clutch lever 162a swings downward. The clutch rod unit 165 moves downward, whereby the clutch release shaft 166 rotates counterclockwise and the clutch mechanism is operated.

(Brake operation mechanism)
The brake operating mechanism is configured such that the left and right brake mechanism operating brake pedals 17a and 17b can take a brake release position (initial position) and a brake operating position by operating the brake pedal. The left and right rear wheel brake mechanisms are so-called two-pedal specifications that are configured to be able to be operated independently. In addition to the brake pedals 17a and 17b, the left and right first brake rods 176, the left and right brake arms 177, and Left and right second brake rods 178 are provided.

  4 and 6, the left and right brake pedals 17a and 17b have base end portions (hereinafter referred to as brake base end portions) 172a, which are supported so as to be swingable around the brake shaft 171 along the vehicle width direction Y, respectively. 172b, arm portions (hereinafter referred to as brake arm portions) 173a and 173b extending rearward and downward from the brake base end portions 172a and 172b, and stepping portions (hereinafter referred to as brakes) provided at the distal ends of the brake arm portions 173a and 173b 174a and 174b). In FIG. 6, the left brake pedal 17a is not shown.

  The left and right brake stepping portions 174a and 174b extend outward from the left and right sides of the brake arm portions 173a and 173b, respectively. A left brake connecting member 175 (not shown in FIG. 6, refer to FIG. 4) is provided at the left end of the brake shaft 171 in the vehicle width direction Y so as not to be relatively rotatable. The left brake base end portion 172a is fitted to the brake shaft 171 so as not to rotate relatively, and the right brake base end portion 172b is disposed adjacent to the left side of the left brake base end portion 172a in the vehicle width direction Y. And is rotatably fitted to the brake shaft 171. Each of the left brake connecting member 175 and the right brake base end portion 172b has a brake lever 179.

  The left and right brake arms 177 are rotatably supported on both sides in the vehicle width Y direction of the clutch housing 8, and both have two lever portions 177 a and 177 b that protrude radially from the rotation axis at a predetermined angle. Yes. The right first brake rod 176 is rotatably connected to a right brake lever 179 provided at the right brake base end 172b at one end, and one lever portion 177a of the right brake arm 177 at the other end. Is pivotally connected to the motor. The right second brake rod 178 is pivotally connected at one end to the other lever portion 177b of the right brake arm 177 and disposed at the other end to the right of the brake device 96 in the vehicle width Y direction. Further, the right brake mechanism actuating member 178 ′ is rotatably connected. The right brake mechanism actuating member 178 ′ can actuate the right rear wheel brake mechanism of the brake device 96 when it is turned in the brake actuating direction, while the right brake mechanism actuating member 178 ′ is actuated when the right brake mechanism actuating member 178 ′ is turned in the brake releasing direction. The operation of the rear wheel brake mechanism can be released.

  The left first and second brake rods 176 and 178 have the same configuration as the right first and second brake rods 176 and 178. That is, the first left brake rod 176 is rotatably connected to a left brake lever 179 provided on the left brake connecting member 175 at one end, and the left brake arm 177 (not shown) at the other end. One lever portion 177a is rotatably connected. The left second brake rod 178 (not shown) is pivotally connected to the other lever portion 177b of the left brake arm 177 (not shown) at one end, and the vehicle width of the brake device 96 at the other end. A left brake mechanism actuating member 178 ′ disposed on the left side in the Y direction is rotatably connected. The left brake mechanism actuating member 178 ′ can actuate the left rear wheel brake mechanism of the brake device 96 when rotated in the brake actuating direction, while the left brake mechanism actuating member 178 ′ rotates when the left brake mechanism actuating member 178 ′ rotates in the brake releasing direction The operation of the rear wheel brake mechanism can be released.

  In this brake operation mechanism, one end of each of the left and right brake pedals 17a and 17b is hooked on a support rod 83 provided in the clutch housing 8, and the other end is connected to the brake arm portions 173a and 173b. A return spring 84 (not shown in FIG. 6; see FIG. 4) hooked on the protrusions 173a ′ and 173b ′ is always urged toward the brake release position, and the driver By depressing each of the brake pedals 17a and 17b against the force, the brake mechanism is positioned at the brake operation position, and the left and right brake mechanisms are each in the brake ON state. When the stepping operation by the driver is released, both the brake pedals 17a and 17b are automatically returned to the brake release position, and both the left and right brake mechanisms are in the brake OFF state.

  More specifically, when the right brake pedal 17b is depressed by the right brake stepping portion 174b, the right brake base end portion 172b is rotated clockwise as shown in FIG. Thus, the right brake lever 179 swings upward and the first brake rod 176 moves upward. As a result, the right brake arm 177 rotates clockwise, so that the second brake rod 178 moves forward. Further, the right brake mechanism operating member 178 ′ rotates in the brake operating direction (clockwise in the figure), and the right rear wheel brake mechanism of the brake device 96 is operated. Further, by releasing the depression pressure operation of the right brake pedal 17b, the right brake base end portion 172b rotates counterclockwise as shown in FIG. 6B, and the right brake lever 179 swings downward accordingly. When the first brake rod 176 moves downward, the right brake arm 177 rotates counterclockwise, so that the second brake rod 178 moves rearward, and the right brake mechanism actuating member further moves. 178 'rotates in the brake release direction (counterclockwise in the figure), and the right rear wheel brake mechanism of the brake device 96 is released.

  On the other hand, when the left brake pedal 17a is depressed by the left brake stepping portion 174a, the brake shaft 171 that rotates integrally with the left brake base end portion 172a rotates in the clockwise direction in the drawing, and accordingly. The left brake lever 179 swings upward and the first brake rod 176 moves upward, whereby the left brake arm 177 rotates in the clockwise direction, so that the second brake rod 178 moves forward, Further, the left brake mechanism actuating member 178 ′ rotates in the brake actuating direction, and the left rear wheel brake mechanism of the brake device 96 is actuated. Further, by releasing the depression pressure operation of the left brake pedal 17a, the brake shaft 171 rotates counterclockwise in the figure, and accordingly, the left brake lever 179 swings downward and the first brake rod 176 is moved. As a result, the left brake arm 177 rotates counterclockwise, so that the second brake rod 178 moves rearward, and the left brake mechanism actuating member 178 ′ rotates further in the brake release direction. Then, the left rear wheel brake mechanism of the brake device 96 is released.

  Further, as shown in FIG. 4, the right and left brake pedals 17a and 17b are attached with a connecting member 180 for integrally connecting the left and right brake pedals 17a and 17b so as to simultaneously operate the left and right rear wheel brake mechanisms. It has been. The connector 180 includes a base 181, a connecting plate 182, and a receiving part 183, and the base 181 is attached to one of the left and right brake pedals 17 a and 17 b, in the illustrated example, the left brake stepping part 174 a of the left brake pedal 17 a. At the same time, a connecting plate 182 is rotatably attached to the base portion 181, a receiving portion 183 is attached to the right brake stepping portion 174 b of the other right brake pedal 17 b, and the connecting plate 182 is rotatably attached to the base portion 181. Is engaged with the receiving portion 183 so that the left and right brake pedals 17a and 17b are integrally connected. The connector 180 is configured to be able to switch between the connected state and the disconnected state of the left and right flake pedals 17a and 17b. In FIG. 4, the left and right brake pedals 17 a and 17 b are not connected by the connecting tool 180.

Next, the manual clutch operation member 300 and the manual brake operation member 400 will be described with reference to FIGS.
(Manual clutch operation member)
As shown in FIGS. 4 and 5, the manual clutch operating member 300 can operate the clutch pedal 16 in accordance with a driver's manual operation, and can swing freely along the vehicle longitudinal direction X. The steering handle 10 provided in the work vehicle 200 can be disposed on the left side in the vehicle width direction Y. More specifically, the manual clutch operation member 300 is a pair of swinging members that have a slender shape in plan view (viewed from the plane) disposed opposite to and parallel to the rod-like clutch operation gripping member 310 at a predetermined distance. A plate 320, a second pivot shaft 330 for a clutch operating member disposed in parallel with the brake shaft 171 and projecting leftward in the vehicle width direction Y from the clutch housing 8, and a clutch operating member to be described later And a sliding contact member 350 with which the rolling member 340 comes into sliding contact.

  The gripping member 310 has a gripping portion 311 that is gripped by the driver at one end, and a connection portion 312 that is connected to the pair of swing plates 320 at the other end. The pair of swing plates 320 has a pedal engaging portion 321 engaged with the clutch pedal 16 at one end portion, and is connected to the gripping member 310 on the way to the other end portion and the other end portion. And has a support portion 322. The support portion 322 is located between the grip portion 311 and the pedal engaging portion 321 and is fitted to the second pivot shaft 330 so as to be rotatable along the vehicle front-rear direction X. At 360, it is retained. Further, the sliding contact member 350 is a plate-like member, and is provided on the clutch arm portion 163 of the clutch pedal 16 so as to protrude rightward in the vehicle width direction Y. The upper portion is used for preventing the rolling member 340 from overrunning. A bent portion 351 is provided. Furthermore, the pair of swing plates 320 has a support shaft 323 that bridges the pair of swing plates 320 in the vehicle width direction Y at one end, and the rolling member 340 is freely rotatable on the support shaft 323. It is supported by. As a result, the pedal engaging portion 321 and the arm portion 163 are engaged via the rolling member 340, and the manual clutch operating member 300 can be pulled backward in the vehicle. The manual clutch operation member 300 may be provided integrally with the work vehicle 200, the sliding contact member 350 is provided on the clutch arm portion 163 of the clutch pedal 16, and the second pivot shaft 330 is provided on the vehicle body. It may be detachably provided by being attached with a bolt or the like.

  As described above, the clutch pedal 16 is always urged toward the clutch operating position. However, against the urging force, the clutch pedal 16 is moved toward the rear of the vehicle by the grip portion 311 of the grip member 310 by the driver's hand. By performing the pulling operation, as shown in FIG. 5A, the pair of swing plates 320 is supported around the second pivot shaft 330 along the vehicle width direction Y by the support portion 322 (clockwise in the figure). And the sliding engagement member 350 provided on the clutch arm portion 163 of the clutch pedal 16 is engaged via the rolling member 340, whereby the clutch pedal 16 is engaged with the clutch release position. Can be located. At this time, when the manual clutch operation member 300 is pulled until the rolling member 340 comes into contact with the bent portion 351 of the sliding member 350, as shown in FIG. In other words, the center of the rolling member 340 is positioned above the center of the second pivot shaft 330 so that the longitudinal gripping portion 311 side is positioned slightly below the second pivot shaft 330 from the pivot shaft 330. Is configured to do. By doing so, the center of the rolling member 340 is located above the center of the second pivot shaft 330, and in this state, the rolling member 340 comes into contact with the bent portion 351 of the sliding member 350. However, the clutch pedal 16 can be reliably held at the clutch release position without the clutch pedal 16 returning to the clutch operating position. Since the clutch mechanism can be held in the “disengaged” state even when the hand is released in this way, manual operation such as sub-shift and PTO shift becomes possible. Further, it can be operated with one hand. For example, even when the brake pedal is operated with the right hand (or right foot), the clutch operation can be performed with only the left hand, and the slope can be easily started as described later. With such a configuration, the clutch pedal 16 can be reliably held at the clutch release position, but it is gripped in the longitudinal direction by at least the second pivot shaft 330 of the gripping member 310 due to its own weight or the like. You may comprise so that the clutch pedal 16 can be hold | maintained in a clutch release position by manual operation of the part 311 side back from this 2nd pivot shaft 330. FIG.

  On the other hand, when the holding state of the clutch release position of the gripping member 310 by the driver's hand is released, as shown in FIG. It is swung around the support shaft 330 (counterclockwise in the figure), and the rolling member 340 of the pedal engaging portion 321 is separated from the sliding contact member 350, whereby the clutch pedal 16 is returned to the clutch operating position. At this time, as shown in FIGS. 1 and 2, a holding member 360 for holding the gripping member 310 may be provided on the vehicle body in front of and above the second pivot shaft 330. The holding member 360 is a member having a U-shaped cross section formed by bending a flexible plate-like member, and holds the holding member 310 by inserting the holding member 310 inside. It is something that can be done. Thereby, the clutch pedal 16 can be held at the clutch operating position. As shown in FIG. 5, the clutch pedal 16 is separated from the manual clutch operation member 300 when the clutch pedal is operated by the foot, so that even if the clutch pedal is operated by the foot of a healthy person or the like, The manual clutch operation member 300 is not interlocked and normal clutch pedal operation is possible.

(Manual brake operation member)
As shown in FIGS. 4 and 6, the manual brake operation member 400 can operate at least one of the left and right brake pedals (the right brake pedal 17 b in the illustrated example) in accordance with a driver's manual operation. It is provided so as to be swingable along the vehicle longitudinal direction X, and can be disposed on the right side of the steering wheel 10 provided in the work vehicle 200 in the vehicle width direction Y. The manual brake operation member 400 includes a pedal engaging portion 423 connected to the brake pedal 17b and a grip portion 411 gripped by the driver. The pedal engaging portion 423 is configured by a pedal side member 420 coupled to the brake pedal 17b, and the grip portion 411 is configured by a gripping member 410 coupled to the pedal side member 420. More specifically, the manual brake operation member 400 is arranged in parallel with the vehicle traveling direction and has an elongated shape in plan view that is operatively connected to the brake pedal 17b via a brake operation member rolling member 440 described later. A pedal-side member 420, a rod-shaped brake operation gripping member 410 connected to the pedal-side member 420, and a support shaft provided to protrude rightward in the vehicle width direction Y from the brake arm portion 173b of the right brake pedal 17b. 430 and a support member that supports the second pivot shaft 451 for the brake operation member disposed in parallel to the brake shaft 171 and is provided on the step flat portion 12 of the vehicle 200. Yes.

  The support member 450 attached to the step flat portion 12 is a member having a U-shaped cross section formed by bending a plate-like member, the side plate portion 452 is arranged in parallel to the vehicle traveling direction, and The open end side is directed upward. The side plate portion 452 is provided with a through hole 452a penetrating in the vehicle width direction Y, and a second pivot shaft 451 is fitted in the through hole 451a so as to be rotatable along the vehicle longitudinal direction.

  The pedal-side member 420 is connected to the right end portion of the second pivot shaft 451 fitted in the through hole 451a of the support member 450 at one end portion, so that the second member along the vehicle width direction Y is connected. The base end 421 is supported so as to be swingable around the pivot shaft 451, and has a connecting portion 422 connected to the gripping member 410 at the other end. The gripping member 410 has a gripping part 411 at one end and a connecting part 412 that is connected to the pedal-side member 420 at the other end. In the configuration of the manual brake operation member 400, the fulcrum position supported at one end is provided below the right brake pedal 17b in the vertical direction perpendicular to the vehicle traveling direction.

  The pedal-side member 420 is a long hole pedal that engages with a support shaft 430 provided on the brake arm portion 173b of the right brake pedal 17b on the way from the base end portion 421 to the connecting portion 422 connected to the gripping member 410. The pedal engaging portion 423 is operatively connected to the arm portion 173b of the right brake pedal 17b in front of the stepping portion 174b of the right brake pedal 17b. Further, the rolling member 440 is rotatably supported on the support shaft 430 engaged with the pedal engaging portion 423. Accordingly, the pedal engaging portion 423 and the arm portion 173b are engaged with each other via the rolling member 440, and the pedal engaging portion 423 is connected to the brake pedal 17b between the base end portion 421 and the grip portion 410. Thus, the manual brake operation member 400 can be pushed forward of the vehicle.

  The connecting portion 412 of the gripping member 410 has at least one bolt (first to third bolts 412a, 412b, 412c in the illustrated example) that are screwed in the vehicle width direction Y via the connecting portion 422 of the pedal side member 420. Have. In the connecting portion 412 of the gripping member 410, the first bolt 412a is in the vehicle front-rear direction X rear position, the second bolt 412b is in the vehicle front-rear direction X front position, and the third bolt 412c is the first and second bolt 412a. , 412b and above the bolts 412a, 412b. The connecting portion 422 of the pedal-side member 420 is arranged in parallel radially with a first female screw hole 422a for support disposed at the rear position in the vehicle longitudinal direction X, with the first female screw hole 422a as the center. A plurality of position-adjusting second female screw holes 422b are provided. The plurality of position-adjusting second female screw holes 422b are formed at a position where the first bolt 412a in the connecting portion 412 of the gripping member 410 penetrates the first female screw hole 422a for support. The second and third bolts 412b and 412c in FIG. Accordingly, the first bolt 412a is loosened, the second and third bolts 412b and 412c are removed, and the gripping member 410 is rotated around the first bolt 412a along the vehicle longitudinal direction X with respect to the pedal side member 420, The second and third bolts 412b and 412c are reinserted through the second female screw hole 422b that is different from the second female screw hole 422b for position adjustment when the bolts 412b and 412c are removed. The relative position of the grip part 411 with respect to the joint part 423 can be adjusted.

  The manual brake operation member 400 may be provided integrally with the work vehicle 200, the support shaft 430 is bolted to the brake arm portion 173b of the right brake pedal 17b, and the support member 450 is bolted to the step flat portion 12. It may be provided so that attachment or detachment is possible.

  As described above, the right brake pedal 17b is always urged toward the brake release position, but against the urging force, the driver's hand moves the vehicle forward by the grip portion 411 of the grip member 410. As shown in FIG. 6A, the pedal-side member 420 moves around the second pivot shaft 451 along the vehicle width direction Y (counterclockwise in the figure). ), The pedal engaging portion 423 of the pedal side member 420 and the support shaft 430 provided on the brake arm portion 173b of the brake pedal 17b are engaged via the rolling member 440, whereby the right brake The pedal 17b can be positioned in the brake operating position. Thus, the manual brake operation member 400 is configured to position the right brake pedal 17b at the brake operating position by a push operation forward of the vehicle.

  On the other hand, when the pushing operation of the gripping member 410 by the driver's hand is released, as shown in FIG. 6B, the pedal side member 420 is moved around the second pivot shaft 451 at the base end portion 421 (see FIG. 6B). The pedal engagement portion 423 and the support shaft 430 are engaged via the rolling member 440, whereby the right brake pedal 17b is returned to the brake release position. At this time, as shown in FIG. 6, the manual brake operation member 400 has a swing range within the vehicle front-rear width of the steering handle 10.

  The manual brake operation member 400 is attached to the left brake pedal 17b, but may be attached to the right brake pedal 17a instead of or together with it. Further, the manual operation of the manual brake operation member 400 is performed by receiving the connecting plate 182 rotatably attached to the base portion 181 of the left brake stepping portion 174a of the left brake pedal 17a at the right brake stepping portion 174b of the right brake pedal 17b. By engaging with the portion 183, the left and right brake pedals 17a, 17b may be integrally connected. In the working vehicle 200, the brake mechanism includes a manual brake mechanism that operates the brake by operating the brake pedal, and an auto that operates the inner rear wheel brake without operating the brake pedal when the front wheel turning angle exceeds a predetermined angle when turning. Switching to the brake mechanism is possible. However, even if the manual brake mechanism is in the state, when the manual brake operation member 400 is mounted on the left and right brake pedals 17b and 17a, for example, during work, When it is desired to reduce the turning radius, the left and right brake pedals 17b and 17a can be operated manually, which is advantageous. Further, when the left and right brake pedals 17b and 17a are connected by the connecting member 180, for example, when traveling on the road, the left and right brake pedals 17b and 17a can be manually operated integrally by the manual brake operation member 400. This is advantageous.

  FIG. 7 shows the operating state of another example 400 ′ of the manual brake operation member according to the present invention, and FIG. 8 shows the relative relationship between the grip portion 411 ′ and the pedal engagement portion 423 ′ of the manual brake operation member 400 ′ shown in FIG. Indicates the positional relationship. In addition, description is abbreviate | omitted about the member which has the same structure as the case of the above-mentioned manual brake operation member 400, and the same referential mark is attached | subjected in FIG.7 and FIG.8.

  In the manual brake operation member 400 ′ shown in FIGS. 7A and 7B, a gripping member 410 ′ (hereinafter referred to as an operation lever) and a pedal side member 420 ′ (hereinafter referred to as a pedal operation lever) are connected. The pedal engaging portion 423 ′ of the pedal operation lever 420 ′ is engaged with the right brake stepping portion 174b of the right brake pedal 17b by the pushing operation forward of the vehicle by the hand at the grip portion 411 ′. In this manual brake operation member 400 ′, as shown in FIG. 7B, when the push operation toward the front of the vehicle is performed, the backrest portion 11 is used for this push operation as in the case of the manual brake operation member 400 described above. As a result, a force is easily applied to the operation lever 410 ′ and the pedal operation lever 420 ′.

  Further, as shown in FIG. 8A, the operation lever 410 ′ and the pedal operation lever 420 ′ are separately provided, and the attachment position and the attachment angle between the operation lever 410 ′ and the pedal operation lever 420 ′ can be changed. Thus, as shown in FIGS. 8B and 8C, a lever operating position that matches the body shape of the driver can be secured.

  In the manual brake operation members 400 and 400 ′ and the work vehicle 200 described above, the manual brake pedal operation members 400 and 400 ′ are operated according to the right brake pedal 17b (and the right brake pedal by the connecting tool 180) according to the manual operation of the driver. Since the left brake pedal 17a) connected to 17b can be operated, a healthy person can operate the brake pedal with his / her feet and hands, as well as a handicapped person such as a handicapped person. The brake pedal can be operated. When the manual brake operation members 400 and 400 ′ are detachably provided to the work vehicle 200, the manual brake operation members 400 and 400 ′ can be attached to an existing work vehicle without developing a special specification work vehicle. Good maintainability when exchanging the operation members 400 and 400 ′ is achieved.

  In addition, since the right brake pedal 17b (and also the left brake pedal 17a) is positioned at the brake operating position by pushing the vehicle forward, the backrest of the seat 11 is used by the pushing operation. As a result, the posture of the upper body can be stabilized easily, and even a person with a reduced mobility can put effort well and the operability is improved accordingly. Further, since the manual brake operation members 400 and 400 ′ can be disposed on one side in the vehicle width direction Y of the steering handle 10 provided in the work vehicle 200, the manual brake operating members 400 and 400 ′ It is possible to shift to the brake pedal operation with the hands of the operation members 400 and 400 ′, and the operability is improved accordingly. At this time, since the manual brake operation members 400 and 400 ′ have a swing range within the vehicle front-rear width of the handle 100, the swing range of the operation members 400 and 400 ′ is within the vehicle front-rear width of the handle 10. As a result, the operability is improved accordingly.

  Further, the two operating members 410, 410 ′ and 420, 420 ′ are gripped with respect to the pedal engaging portions 423, 423 ′ so that the relative positions of the gripping portions 411, 411 ′ with respect to the pedal engaging portions 423, 423 ′ can be adjusted. Since the relative positions of the parts 411 and 411 ′ are connected to each other so as to be adjustable, the gripping positions of the gripping parts 411 and 411 ′ can be adjusted to a desired position according to the height of the driver, the length of the arm, etc. . Thereby, regardless of the driver's body shape, ease of use can be ensured, and operability can be improved accordingly. Furthermore, since the pedal engaging portion 423 and the arm portion 173b are engaged via the rolling member 440, the operating force of the manual brake operating member 400 can be reduced. Further, the operation members 400 and 400 ′ are positioned below the pedal engaging portions 423 and 423 ′ and the left brake pedal 17b in the vertical direction in which the fulcrum position supported by the work vehicle 200 at one end is orthogonal to the traveling direction. As described above, the push operation is performed with a simple structure, and as described above, the posture of the upper body is easily stabilized. It can be inserted and the operability is improved accordingly.

  Further, since the manual clutch operation member 300 and the manual brake operation members 400 and 400 ′ are arranged with the steering handle 10 provided in the work vehicle 200 in the vehicle width direction Y, the manual clutch operation is performed. The operation with both hands of the member 300 and the manual brake operation members 400 and 400 ′ becomes easy. For example, the brake pedals 17a and 17b are operated by the manual brake operation members 400 and 400 ′ as in the case of starting on a slope. When the clutch pedal 16 is operated by the manual clutch operation member 300, the half-clutch operation can be successfully performed. Further, the manual clutch operation member 300 can be pulled rearward, the manual brake operation members 400, 400 ′ can be pushed forward of the vehicle, and the manual clutch operation member 300 and manual brake operation members 400, 400 can be operated. Since the reverse operation can be performed, the operability can be improved. For example, it is particularly advantageous when the clutch pedal operation of the manual clutch operation member 300 and the brake pedal operation of the manual brake operation members 400 and 400 'are performed simultaneously with both hands, such as when performing the half-clutch operation.

FIG. 1 is a side view of a working vehicle to which a manual brake operation member according to the present embodiment is applied. FIG. 2 is a plan view of the vehicle. FIG. 3 is a skeleton diagram showing a power transmission configuration of the vehicle. FIG. 4 is a front view of a principal part including a partial cross section in a state where the manual clutch operating member and the manual brake operating member are provided. FIG. 5 is a schematic side view showing the operating state of the manual clutch operating member shown in FIG. FIG. 6 is a schematic side view showing the operating state of the manual brake operation member shown in FIG. FIG. 7 is a schematic side view showing an operating state of another example of the manual brake operation member according to the present invention. FIG. 8 is a diagram illustrating a relative positional relationship of the grip portion with respect to the pedal engaging portion of the manual brake operation member illustrated in FIG. 7.

Explanation of symbols

1, 2 Driving wheel 5 Driving source 10 Steering handle 12 Step flat part 17a, 17b Brake pedal for operating left and right brake mechanism 171 First pivot shafts 172a, 172b Left and right brake base end parts 173a, 173b Left and right brake arm parts 174a, 174b Left and right brake depressing portion 200 Working vehicle 400 Manual brake operation member 411 Grip portion 421 Base end portion 423 Pedal engagement portion 440 Rolling member 450 Support member 451 Second pivot shaft X Vehicle longitudinal direction Y Vehicle width direction

Claims (11)

Manual brake operation applied to a work vehicle including a brake mechanism that operatively applies a braking force to a traveling system transmission path from a drive source to a drive wheel, and a brake operation mechanism including a brake pedal for operating the brake mechanism A member,
A manual brake operation member characterized in that the brake pedal can be operated according to a driver's manual operation. A work vehicle including a brake mechanism that operatively applies a braking force to a traveling system transmission path from a drive source to a drive wheel, and a brake operation mechanism including a brake pedal for operating the brake mechanism,
A working vehicle comprising a manual brake operation member capable of operating the brake pedal according to a driver's manual operation.   The work vehicle according to claim 2, wherein the manual brake operation member is detachably provided.   The manual brake operation member is provided so as to be swingable along the vehicle front-rear direction, and is configured to position the brake pedal at a brake operating position by a push operation forward of the vehicle. The work vehicle according to claim 2 or 3.   The work vehicle according to claim 4, wherein the manual brake operation member can be disposed on one side in a vehicle width direction of a steering handle provided in the work vehicle.   The working vehicle according to claim 5, wherein the manual brake operation member has a swing range within a vehicle front-rear width of the steering handle. The manual brake operation member has a pedal engaging portion coupled to the brake pedal, and a gripping portion gripped by a driver,
The working vehicle according to claim 2, wherein a relative position of the grip portion with respect to the pedal engaging portion is adjustable. The brake pedal includes a base end portion that is swingably supported around a first pivot shaft along the vehicle width direction, an arm portion that extends rearward and downward from the base end portion, and a distal end portion of the arm portion. And a stepping portion provided,
The manual brake operation member includes a base end portion that is swingably supported around a second pivot shaft along the vehicle width direction, a grip portion gripped by a driver, the base end portion, and the grip portion A pedal engaging portion connected to the brake pedal between,
The work vehicle according to claim 2, wherein the pedal engaging portion is operatively connected to the arm portion of the brake pedal in front of the stepping portion.   The work vehicle according to claim 8, wherein the pedal engaging portion and the arm portion are engaged via a rolling member.   The said manual brake operation member is provided so that the fulcrum position supported by the said one end part may be located below the said brake pedal in the orthogonal | vertical direction orthogonal to a vehicle advancing direction. Working vehicle.   The work vehicle according to claim 8, further comprising a support member that supports the second pivot shaft and is attached to a step flat portion of the work vehicle. .

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