JP4243400B2 - Agricultural work machine foot type brake lock mechanism - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a foot type brake lock mechanism of an agricultural machine.
[0002]
[Prior art]
A conventional agricultural machine has a foot-type brake configured to be able to be depressed at the lower right side of the driver's seat, and is used to hold the brake-operated state by depressing the brake pedal. A locking mechanism is provided.
[0003]
As such a conventional foot-type brake lock mechanism of an agricultural machine, a base end portion of a lock arm is rotatably provided on the machine body frame, and a plurality of hooks are formed at the tip end portion of the lock arm, and the brake is braked by any one of the hooks. The pedal is locked and the brake pedal is depressed to keep the brake operated.
[0004]
And when the depression angle of the brake pedal that activates the brake is changed due to wear of the brake pad, the brake pedal is braked by changing the position of the hook at the tip of the lock arm that locks the brake pedal. It was possible to keep it in a state.
[0005]
[Problems to be solved by the invention]
However, in the foot type brake lock mechanism of the conventional agricultural machine, the position of the hook at the tip of the lock arm that locks the brake pedal is changed when the depression angle of the brake pedal for operating the brake is changed. Therefore, when the brake pad is further worn, even if the brake pedal is locked by the hook formed on the most proximal side, the brake pedal can be held. May be difficult to hold in a state where the brake is operated.
[0006]
On the other hand, depending on the processing accuracy and assembly accuracy of the lock arm, there are cases where the brake pedal cannot be held in a brake-operated state even when the brake pedal is locked by the hook formed on the most distal end side.
[0007]
[Means for Solving the Problems]
Therefore, in the present invention, the foot brake that depression operably configured, in agricultural machine comprising providing a lock mechanism for holding the state of being braking by depressing the brake pedal, the locking mechanism is dependent on the machine frame The base end of the lock arm is pivotably provided on the pivot shaft that is extended in the width direction while being urged forward by the urging spring, and the brake pedal is engaged at the tip of the lock arm. By stopping, the brake pedal is depressed to maintain the brake-operated state, and the lock arm is attached to the distal end portion of the base end side arm body attached to the rotation support shaft so as to be able to rotate back and forth. A male screw body is attached, a female screw body is screwed onto the male screw body, and a distal end side arm body on which a hook for locking the connecting plate is formed is attached to the female screw body to make it extendable and retractable. Together, in which it provides cents a foot brake lock mechanism of the agricultural machine, characterized in that inclined forward the male screw member with respect to the extending direction of the lock arm.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
The agricultural machine according to the present invention is provided with a lock mechanism for maintaining a state in which a brake is depressed by depressing a brake pedal to a foot type brake configured to be depressed.
[0011]
The lock mechanism is provided with the base end of the lock arm rotatably on the fuselage frame, and the brake pedal is locked at the tip of the lock arm so that the brake pedal is depressed and the brake is operated. It is composed.
[0012]
In addition, the lock arm is provided with arm radius adjusting means for adjusting the turning radius of the lock arm.
[0013]
Therefore, the turning radius of the lock arm can be adjusted as appropriate according to the degree of wear of the brake pad, the brake pedal can be depressed and the brake operated can be reliably maintained, and safety is improved. It is something that can be done.
[0014]
In particular, by forming a plurality of rotation support holes at the base end of the lock arm and changing the rotation support hole used as the rotation fulcrum, the rotation radius of the lock arm can be adjusted. The turning radius of the lock arm can be adjusted step by step even though it is a simple structure. This also ensures that the brake pedal is depressed and the brakes are activated, improving safety. It is something that can be done.
[0015]
In addition, by configuring the lock arm to be extendable and retracting the lock arm so that the lock arm's turning radius can be adjusted, the turning radius of the lock arm can be continuously finely adjusted. This also ensures that the state in which the brake pedal is depressed by depressing the brake pedal can be reliably maintained, and safety can be improved.
[0016]
【Example】
Embodiments of the present invention will be described below with reference to the drawings.
[0017]
As shown in FIG. 1, a riding rice transplanter 1 as an agricultural working machine according to the present invention has a planting machine 3 connected to a rear part of a traveling machine body 2 configured to be capable of self-running through a lifting mechanism 4. ing.
[0018]
As shown in FIG. 1, the traveling machine body 2 has a traveling unit 6 disposed in the lower part of the body frame 5, and a prime mover part 7 disposed in the upper front side of the machine frame 5, and a position immediately behind the prime mover part 7. A driving operation unit 8 is provided.
[0019]
As shown in FIGS. 1 and 2, the body frame 5 is installed between a pair of left and right main pipes 9 and 10 extending in the front-rear direction and the front end portions of the main pipes 9 and 10. A main frame structure 11 having a U-shape in plan view is formed from a front pipe (not shown) having a rectangular cross section, and is connected to the front halfway of the left and right main pipes 9 and 10 of the main frame structure 11 Are attached to the lower end of each connecting rod 12, 13 between the pair of left and right cylindrical sub-pipes 14, 15 and the middle part of the sub-pipes 14, 15. A lower frame constituting body 17 composed of a cylindrical connecting pipe 16 which is installed is continuously provided. In the figure, 18 is a connecting pipe having a rectangular cross section.
[0020]
The body frame 5 includes a pair of left and right frames attached to the rear ends of the sub-pipes 14 and 15 in an inclined manner toward the upper front side between the rear end of the lower frame structure 17 and the rear end of the main frame structure 11. A cylindrical rear frame structure 21 consisting of a cylindrical rear pipe 19, 19 and a cylindrical upper pipe 20 installed between the upper ends of the rear pipes 19, 19. From the pair of left and right inclined pipes 22 and 22 that connect the middle part of the upper pipe 20 and the middle part of the connecting pipe 16 between the rear frame structural body 21 and the lower frame structural body 17 in a slanted shape with front and rear rear heights. The upper frame constituting body 23 is continuously provided. In the figure, reference numeral 24 denotes a gate-shaped seat support pipe straddling between the middle portions of the inclined pipes 22 and 22.
[0021]
As shown in FIGS. 1 and 2, the prime mover unit 7 is constructed by installing a flat engine mounting table 25 between the front side portions of the left and right main pipes 9, 10 of the machine frame 5, and on the engine mounting table 25. While the engine 26 as a prime mover is mounted, a transmission case 27 as a speed change mechanism is attached to the lower part of the engine mounting table 25, and the engine 26 is linked and connected to the transmission case 27. Further, the planting machine 3 is linked to the engine 26 via a planting interlocking mechanism 28.
[0022]
The prime mover unit 7 transmits the power of the engine 26 to the traveling unit 6 and the planting machine 3 via the mission case 27.
[0023]
The prime mover 7 has a fuel tank (not shown) disposed immediately above the engine 26, covers the fuel tank and the engine 26 with a bonnet 29, and further, positions on the left and right sides of the bonnet 29. Are provided with spare seedling stands 30 and 30 for placing spare seedlings.
[0024]
As shown in FIG. 1, the traveling unit 6 interlocks and connects a pair of left and right front axle cases 31 and 32 to the mission case 27, and interlocks and connects the front wheels 33 to the front axle cases 31 and 32. A rear axle case 34 is linked to the case 27, and a pair of left and right rear wheels 35, 35 are linked to the rear axle case 34.
[0025]
In this way, the power of the engine 26 is transmitted from the engine 26 to the transmission case 27, transmitted from the transmission case 27 to the front axle cases 31, 32, and transmitted from the front axle cases 31, 32 to the front wheels 33, 33. On the other hand, the transmission is transmitted from the transmission case 27 to the rear axle case 34, and from the rear axle case 34 to the rear wheels 35, 35.
[0026]
As shown in FIG. 1, the driving operation unit 8 has a steering wheel 36 rotatably disposed on the top of the bonnet 29, a seat 37 disposed immediately behind the steering wheel 36, At the left side position, a shift lever 38 for shifting the traveling machine body 2 is disposed so as to be swingable in the front-rear direction, and at the right side position of the seat 37, the lifting operation of the planting machine 3 and An elevating / shifting lever 39 for shifting the high and low two-stage belt-type transmission mechanism is arranged so as to be swingable in the front-rear direction. In the figure, reference numeral 40 denotes a casing body.
[0027]
Further, the driving operation unit 8 is disposed at the left side position of the bonnet 29 so that the auxiliary brake lever 41 can be swung in the front-rear direction, and the clutch pedal 42 is depressed to the left side position of the auxiliary brake lever 41. The brake pedals 43 and 44 of the foot type brake 45 can be depressed and operated at the right side of the bonnet 29.
[0028]
As shown in FIGS. 3 and 4, the foot brake 45 has a pair of left and right brackets 46 and 47 attached to the connecting pipe 16 of the lower frame structure 17, and a rotating shaft 48 is rotated between the brackets 46 and 47. A boss 49 formed at the base end of the right brake pedal 44 is fixed to the right end of the rotating shaft 48 while the base of the left brake pedal 43 is fixed to the right side of the rotating shaft 48. A boss 50 formed at the end is freely fitted freely. Further, a brake mechanism (not shown) is provided on the left end of the boss 50 and the rotation shaft 48 via the brake rods 51 and 52. ). In the figure, 53 and 54 are interlocking arms, and 55 and 56 are urging springs.
[0029]
Pedal plates 57 and 58 are attached to the front ends of the brake pedals 43 and 44, and a connecting plate 59 is installed between the pedal plates 57 and 58.
[0030]
Further, the foot type brake 45 is provided with a lock mechanism 60 for holding the brake pedal 43, 44 depressed to operate the brake.
[0031]
The lock mechanism 60 has a substantially U-shaped step frame 61 in plan view attached to the right side of the main pipe 10 on the right side of the body frame 5 and a substantially U-shaped bracket 62 in plan view attached to the middle part of the step frame 61. The pivot shaft 63 extended in the left-right width direction is rotatably attached to the bracket 62, and the base end portion of the lock arm 64 is pivotably attached to the pivot shaft 63 in the front-rear direction. Yes. In the figure, 65 is a retaining pin, and 66 is an urging spring for urging the lock arm 64 forward.
[0032]
The lock arm 64 is formed with two hooks 67 and 68 at the distal end thereof spaced apart from each other in the extending direction of the lock arm 64, and the connecting plate of the brake pedals 43 and 44 is formed by one of the hooks 67 and 68. By locking 59, the brake pedals 43 and 44 are depressed so that the brake-operated state can be maintained. By depressing the brake pedals 43 and 44 again, the locked state between the hooks 67 and 68 and the connecting plate 59 is released, and the brake is released.
[0033]
In this way, the plurality of hooks 67, 68 are formed at the tip of the lock arm 64 when the depression angle of the brake pedals 43, 44 that actuate the brake changes due to wear of the brake pads. This is because the position of the hook 67 that locks 59 is changed to the hook 68 formed on the base end side of the lock arm 64 so that the brake pedals 43 and 44 can be held in a brake-operated state.
[0034]
The lock arm 64 is provided with arm radius adjusting means 69 for adjusting the turning radius of the lock arm 64.
[0035]
The arm radius adjusting means 69 is formed by drilling two rotation support holes 70 and 71 at the base end portion of the lock arm 64 at an interval in the extending direction of the lock arm 64. The rotation radius of the lock arm 64 can be adjusted by selectively changing the rotation support holes 70 and 71 used as the above.
[0036]
That is, when the brake pad is not worn much, the rotation support shaft 63 is inserted into the rotation support hole 71 formed on the base end side, and the lock arm 64 is moved in the front-rear direction around the rotation support hole 71. And the connecting plate 59 is locked with the hook 67 on the tip side so that the brake pedals 43 and 44 are held in a brake-operated state. When the depressing angle of the brake pedals 43 and 44 to be operated changes, the position of the hook 67 for locking the connecting plate 59 is changed to the hook 68 formed on the base end side of the lock arm 64, and the brake pad is When the depression angle of the brake pedals 43 and 44 that are worn and the brakes are operated changes, the rotation support shaft 63 is inserted into the rotation support hole 70 formed on the tip end side, and the rotation support hole 70 is centered. So that the lock arm 64 rotates in the front-rear direction Thus, the brake plate 43, 44 can be held in a brake-operated state by locking the connecting plate 59 with the hook 67 on the tip end side again.
[0037]
Thus, in this embodiment, since the arm radius adjusting means 69 is provided on the lock arm 64, the turning radius of the lock arm 64 can be adjusted as appropriate according to the degree of wear of the brake pad. The state where the brake is operated by depressing 43 and 44 can be reliably maintained, and the safety can be improved.
[0038]
In particular, in the present embodiment, a plurality of rotation support holes 70 and 71 are formed in the base end portion of the lock arm 64, and the rotation support holes 70 and 71 used as rotation fulcrums are changed to change the lock arm 64. Since the turning radius can be adjusted, the configuration of the arm radius adjusting means 69 can be simplified, and the turning radius of the lock arm 64 can be adjusted stepwise.
[0039]
FIG. 5 is a view showing an arm radius adjusting means 69 as another embodiment. In this embodiment, the lock arm 64 is configured to be extendable and retractable, and the lock arm 64 is expanded and contracted to rotate the lock arm 64. The moving radius can be continuously finely adjusted.
[0040]
That is, the lock arm 64 has a male screw body 73 attached to the distal end portion of the base end side arm body 72 attached to the rotary support shaft 63 so as to be able to rotate back and forth, and the female screw body 74 is screwed to the male screw body 73. A distal end side arm body 75 having hooks 67 and 68 for locking the connecting plate 59 is attached to the female screw body 74, and is configured to be extendable. In the figure, 76 is a nut for preventing rotation.
[0041]
As described above, in this embodiment, the lock arm 64 is configured to be extendable and retractable, and the lock arm 64 is configured to expand and contract so that the turning radius of the lock arm 64 can be adjusted. The moving radius can be continuously finely adjusted, and this also ensures that the state in which the brake pedal is depressed and the brake is operated can be reliably maintained, and safety can be improved.
[0042]
As shown in FIG. 1, the planting machine 3 has a shaft casing 77 extended in the left-right width direction connected to the lifting mechanism 4, and a seedling stand 78 is placed on the upper side of the coaxial casing 77 in a slanted shape with a front height and a low height. The planting mechanism 79 is linked to the shaft casing 77, and the float 80 is attached to the lower portion of the shaft casing 77 with a gap in the left-right width direction. In the figure, 81 is a fertilizer applicator.
[0043]
As shown in FIG. 6, the float 80 has a support pipe 82 that extends in the left-right width direction attached to the lower rear portion of the shaft casing 77, and the support rod 83 projects toward the rear lower portion on the outer peripheral surface of the support pipe 82. The float body 84 is attached to the lower end portion of the support rod 83 so as to be rotatable up and down, and a biasing spring 85 is interposed between the lower end portion of the support rod 83 and the float body 84 so as to float. The main body 84 is energized. In the figure, 86 and 87 are brackets, 88 is a rotating shaft, and 89 is a retaining pin.
[0044]
The urging spring 85 is engaged with a mounting hole 90 having one end drilled in the lower end of the support rod 83 and the other end abutting against the upper surface of the bracket 87 mounted at the substantially upper center of the float body 84. Touching.
[0045]
Two mounting holes 90 are formed at the lower end portion of the support rod 83 with a space therebetween in the vertical direction. When one end of the biasing spring 85 is engaged with the upper mounting hole 90, the mounting spring 90 is floated by the biasing spring. When the biasing force that biases the main body 84 is greatly applied, and when one end of the biasing spring 85 is engaged in the lower mounting hole 90, the biasing spring biases the float main body 84 with the biasing spring. The biasing force by the biasing spring 85 can be adjusted so that the biasing force acts small.
[0046]
【The invention's effect】
The present invention is implemented in the form as described above, and has the following effects.
[0047]
In the present invention, the foot brake that depression operably configured, in agricultural machine comprising providing a lock mechanism for holding the state of being braking by depressing the brake pedal, the locking mechanism, the lateral width direction in the machine frame The base end of the lock arm is rotatably provided on the rotating support shaft extended to the front while being urged forward by the urging spring, and the brake pedal is locked at the distal end of the lock arm. The lock arm is configured to hold the brake-operated state by depressing the brake pedal. A body is attached, a female screw body is screwed onto the male screw body, and a distal end side arm body on which a hook for locking the connecting plate is formed is attached to the female screw body so that it can be extended and retracted. By being inclined forward the male screw member with respect to the extending direction of the lock arm, it is possible to adjust the turning radius of the appropriate lock arm according to the degree of wear of the brake pads, the brake pedal It is possible to reliably maintain the state where the brake pedal is operated by stepping on, and safety can be improved.
In addition, it is possible to adjust the turning radius of the lock arm step by step with a simple structure, and this also ensures that the brake pedal is depressed and the brakes are activated. Can be improved.
In addition, the turning radius of the lock arm can be continuously finely adjusted, and this also ensures that the brake pedal is depressed and the brake is operated, thereby improving safety. it can.
[Brief description of the drawings]
FIG. 1 is a left side view showing a rice transplanter according to the present invention.
FIG. 2 is a plan view showing an airframe frame.
FIG. 3 is a plan view showing a lock mechanism.
FIG. 4 is a right side view of the same.
FIG. 5 is a side view showing a lock mechanism as another embodiment.
FIG. 6 is a side view showing a float.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Passenger rice transplanter 2 Traveling machine body 3 Planting machine 4 Lifting mechanism 5 Airframe frame 6 Traveling part 7 Motor part 8 Driving operation part
43,44 Brake pedal
45 foot brake
60 Locking mechanism
63 Rotating spindle
64 Lock arm
67,68 hook
69 Arm radius adjustment means
70,71 Rotating support hole

Claims (1)

In a farm work machine provided with a lock mechanism (60) for holding a brake-operated state by depressing a brake pedal (43, 44) on a foot type brake (45) configured to be capable of being depressed,
The lock mechanism (60) is configured such that a lock arm (64 ) is urged forward by a biasing spring (66) on a rotation support shaft (63) provided to extend in the left-right width direction on the body frame (5). ) Of the base end of the
The brake pedal (43, 44) is locked at the front end of the lock arm (64), so that the brake pedal (43, 44) is depressed to maintain the brake-operated state. (64) has a male screw body (73) attached to the distal end portion of the base end side arm body (72) attached to the rotary support shaft (63) so as to be able to rotate back and forth, and the male screw body (73). The female screw body (74) is screwed to the female screw body (74), and the distal end side arm body (75) is formed with hooks (67, 68) for locking the connecting plate (59) to the female screw body (74). A foot type brake lock for agricultural machines , wherein the male screw body (73) is inclined forward with respect to the extending direction of the lock arm (64). mechanism.

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