JP2777351B2 - Brake pedal structure of riding rice transplanter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a brake pedal structure for a riding rice transplanter.

[0002]

2. Description of the Related Art Conventionally, as an embodiment of a brake pedal structure of a riding rice transplanter, a left arm support for supporting a left brake pedal arm on a body frame by rotatably mounting an arm support shaft on the body frame. There is a type in which a boss is rotatably fitted integrally and a right arm supporting boss for supporting the right brake pedal arm is rotatably fitted to the support shaft.

The arm support shaft fitted with the left arm supporting boss is interlockedly connected to the left brake device via a left interlocking mechanism, and the left brake device is braked in conjunction with the depressing operation of the left brake pedal. On the other hand, the right arm supporting boss is interlockingly connected to the right brake device via a right interlocking mechanism so that the right brake device can be braked in conjunction with the depression operation of the right brake pedal.

[0004] Further, a casing body forming a floor is stretched on the body frame, and a pedal arm insertion hole is formed on the right side of the casing body. The distal ends are projected upward, and stepping pedals are respectively attached to the ends of the brake pedal arms, and both stepping pedals are disposed inside the casing body in plan view.

[0005]

However, in the above-described brake pedal structure, the stepping pedal is disposed inside the casing body, and is located just in front of the right foot of the operator who sits on the driver's seat and operates the steering wheel. As a result, the operator tends to step on the pedal outward to the right side, causing the brake pedal arm to move sideways or twist, and the brake pedal cannot be smoothly depressed around the arm support shaft. is there.

[0006]

Therefore, according to the present invention, a casing body forming a floor is stretched on a body frame,
The casing body has a gradually narrowing left and right width from the rear end side to the front end side, a brake pedal is disposed on the right side of the casing body, and a stepping pedal of the brake pedal is moved in the middle of the casing body. And a brake pedal structure of the riding rice transplanter, wherein the brake pedal structure is arranged so as to protrude outward from the right end of the portion.

[0007]

Embodiments of the present invention will be described below with reference to the drawings.

1A and 2A show a riding rice transplanter. The riding rice transplanter (A) moves up and down a planting section (2) behind a self-propelled traveling section (1). Connected via link mechanism (3)
The planting section (2) can be moved up and down by a hydraulic cylinder (4).

The traveling section (1) will be described with reference to FIGS.

As shown in FIGS. 1 and 2, the traveling section (1) is provided with an engine (11) at a front portion on a body frame (10).
An operation unit (12) is provided at the rear.

Then, on the lower side of the front of the body frame (10),
The transmission case (13) is linked and mounted to the engine (11), and the left and right front axle cases (15) and (15) protrude from the left and right sides of the transmission case (13), respectively, to the outside. The front wheels (16) (16) are attached to the tip of 15) (15).

A rear axle case (17) is attached to a rear portion of the body frame (10), and rear wheels (18) and (18) are attached to left and right side surfaces of the case (17), respectively.

The transmission case (13) and the rear axle case (17) are linked to each other via a transmission shaft (19).

(20) is a casing body which also serves as a floor surface, a transmission guide plate, a fender, a seat mounting plate (20a), etc., and is integrally molded from a highly rigid synthetic resin such as FRP. It is stretched on the frame (10). And
The casing body (20) is formed such that the left-right width is gradually reduced from the rear end side to the front end side.

Further, (21) is a hood, and
(11) and a fuel tank located directly above the engine (11)
(22) and a steering shaft (2
3) is covered.

The operating section (12) includes an engine (1).
Immediately after 1), the steering shaft (23) is erected and the handle (24) is attached to the upper end of the shaft (23), while the lower end of the shaft (23) is integrated with the rear upper part of the transmission case (13). Pitman arm shaft (28) that is linked to the steering transmission case (27) that is attached to the case and that hangs down from the case (27)
A vertically long case (41) of left and right front axle cases (15) (15) is operatively connected to a lower end of the front axle case (15) via a steering mechanism (25).

The seat (2) is located behind the handle (24).
6) formed at the rear of the casing body (20).
a) It is mounted directly on top.

(30) is a steering shaft (23)
(31) is the bonnet (21)
(32) Clutch lever protruding above the left side of
Is the planting section elevating lever arranged on the right side of the seat (26), (3
3) is a clutch pedal arranged on the left side of the hood (21), and (34) is a brake pedal arranged on the right side of the hood (21).

As shown in FIGS. 2 to 5, the brake pedal (34) has an arm support shaft (131) supported on a front horizontal frame (10a) of the body frame (10) via a boss (130). Then, the base end of each brake pedal arm (34c) (34d) is supported via left and right arm supporting bosses (132) (133), and the distal end of each brake pedal arm (34c) (34d) And, it extends outward to the right side and projects upward from the pedal arm insertion hole (20c) formed in the right side of the casing body (20), and the left and right side pedals (34a) (34a) ( 34b), and the right-hand pedal (34b) is arranged so as to protrude outward from the right edge of the middle part of the casing body (20).

The arm support shaft (131) is connected to the boss (130).
The left arm support boss (132) is rotatably fitted to the support shaft (131), and the base end of the left brake pedal arm (34c) is attached to the boss (132). On the other hand, the right arm support boss (133) is pinned to the arm support shaft (131).
34), and the base of the right brake pedal arm (34d) is attached to the boss (133).

In addition, the left and right width (W1) of the left arm supporting boss (132) is equal to the left and right width (W2) of the right arm supporting boss (133).
It is formed wider than that.

(135) is a spring locking pin attached to the body frame (10), (136) and (137) are spring locking pins
(135) and the left and right brake pedal arms (34c) (34d)
2) is color.

The left and right brake pedal arms (34c)
Link mechanisms (138) and (139) for left and right brake braking are interposed between (34d) and left and right brake units described later provided in the rear axle case (17), respectively.

Such a left brake braking link mechanism (138).
Is a boss for supporting the left arm, as shown in FIGS.
The tip of a left brake braking projection (140) projecting upward from the periphery of (132) and the left brake braking arm interlockingly connected to the left brake section via the left brake fork shaft (141)
Between the tip of (142) and the left brake braking rod (143)
Is configured.

On the other hand, the right brake braking link mechanism (139)
Is connected to the right end of a right brake braking projection (144) projecting upward from the base end of the arm support shaft (131) and to the right brake unit via a right brake fork shaft (145). A right brake braking rod (147) is interposed between the front end of the brake braking arm (146). (148) (149)
Are rod connecting pins.

The left brake braking arm (142) and the right brake braking arm (146) are vertically intersected, and the distance between the left and right brake fork shafts (141) (145) is made as small as possible. In addition, the working stroke of each arm (142) (146) can be secured, and the rear axle case (1
7) is being downsized.

As described above, when the left pedal (34a) is depressed, the left brake portion of the left rear wheel (18) is braked.
Is stopped, and a sharp turn to the left can be performed. Similarly, when the right pedal (34b) is depressed, a sharp turn to the right can be performed.

The left and right brake pedal arms (34b)
(34c) is disposed immediately above the right front axle case (15) in the front-rear direction. As shown in FIGS. 2 and 4, the distal ends of the pedal arms (34b) and (34c) are It is bent upward and protrudes through the step opening (150) opened in the right step (20b) forming the right front part of the casing body (20), and the left and right pedals (34a) (34b) The mounting cylinders (34e) and (34f) attached to the lower surface of the
(34f) and the protruding end are detachably connected by connecting bolts (151) and (151).

3 and 4, reference numeral (153) denotes an arm receiver, and (154) denotes a pedal lock device.

The embodiment of the present invention is configured as described above. According to this embodiment, the following operation and effect are produced.

That is, the right arm supporting boss (133) for supporting the right brake pedal arm (34d), which the operator tends to depress outward and downward on the right side, is fitted to the arm support shaft (131) so as to be rotatable integrally. The left arm support boss (132) that supports the left brake pedal arm (34c), which the operator steps relatively directly below, is rotatably fitted to the support shaft (131). Boss (13
By the rotation of 2), the support shaft (131) can be prevented from being twisted.

In addition, the left and right width (W1) of the left arm supporting boss (132) is equal to the left and right width (W2) of the right arm supporting boss (133).
Since the left brake pedal arm (34c) has a wider width than the left brake pedal arm (34c), the inclination of the left arm support boss (132) with respect to the arm support shaft (131) due to the lateral displacement or torsion of the left brake pedal arm (34c) is reduced. In addition, it is possible to reliably prevent the support shaft (131) from rotating.

Accordingly, the left and right brake units can be reliably braked in conjunction with the depressing operations of the left and right pedals (34c) and (34d), whereby the aircraft can smoothly turn sharply. In this embodiment, the clutch pedal (33) is configured as follows.

That is, as shown in FIGS. 6 and 7, the clutch pedal (33) is connected to the base end of a clutch pedal arm (33b) having a distal end attached to the pedal (33a) by the left frame of the body frame (10). (10c) horizontal support shaft (18
0) via a boss (181) so as to be vertically rotatable. The horizontal support shaft (180) has an interlocking mechanism (57) that interlocks the engine (11) and the transmission case (13). One end of a clutch connecting / disconnecting mechanism (182) for connecting / disconnecting the clutch unit is interlockingly connected. (183) is a spring for restoring the clutch pedal.

As shown in FIG. 7, the interlocking mechanism (57) includes an output pulley (11b) attached to an output shaft (11a) of the engine (11).
A transmission belt (57a) is wound around an input pulley (56c) attached to a shaft (56) of the transmission case (13), and a tip of a tension arm (57b) is wound on one side of the belt (57a). The tension roller (57c) attached to the can be pressed and released.

The tension roller (57c) constantly presses one side of the power transmission belt (57a) by a tension spring (57d) to tension the belt (57a), while the clutch pedal (57). The clutch portion is configured to perform the pressing release operation in conjunction with the stepping operation of 33).
(57e) is an arm support shaft, and (57f) is a spring connection bracket.

As shown in FIGS. 6 and 7, the clutch connecting / disconnecting mechanism (182) is provided immediately after the output pulley (11b).
(186), and a pivot boss (187) is rotatably fitted to the support shaft, and the rod connecting protrusion (188) and the arm connecting protrusion (189) are fitted from the boss (187). And the rod connecting projection (1
A push / pull rod (185) is interposed between the rod connecting arm (184) protruding from the boss (181) and the arm connecting protruding piece (189) and the base of the tension arm (57b). A connecting piece (190) is interposed between the arm operating piece (57g) attached to the end via an arm support shaft (57e).

In this configuration, the clutch pedal arm (33b) attached to the boss (181) and the push / pull rod (185)
Is centered on the left frame (10c) of the body frame (10),
The boss (1
81) to prevent the horizontal support shaft (180) from falling down so that operation can be performed smoothly.

As shown in FIG. 7, the clutch lever (31) has a base end on a support (10d) erected immediately after the engine (11) via a clutch lever support shaft (200). Attached so as to be able to rotate back and forth, the same support shaft (200) and the rotating boss (187)
Link (2) between the wire connecting projection (201)
02) and push-pull wire (203).

By rotating the clutch lever (31) backward, the link (202) → the push / pull wire (203) →
Projecting piece for wire connection (201) → Rotating boss (187) → Projecting piece for arm connection (189) → Connecting piece (190) → Arm operating piece (57g) → Tension roller (57c) via tension arm (57b) )
Of the transmission belt (57a) is released, and the clutch portion can be brought into the disconnected state.

Conversely, by rotating the clutch lever (31) forward, the clutch portion can be brought into the connected state.

In this embodiment, the front axle case (15) is configured as follows.

That is, the front axle case (15)
Is a horizontally long case extending laterally outward as shown in FIG.
(40) and a vertically long case (41) extending in the vertical direction.
(40), the upper end of the vertical case (41) is rotatably connected to the lower surface of the distal end of the horizontal case (40) around the axis of the vertical case (41), and the vertical case (41) is connected. ) At the lower end of the front wheel (1
6) is installed. (16a) is a front axle, and (40e) is a sealing material by a collar.

The horizontal case (40) and the vertical case (41)
Are divided into two parts so that they can be joined and separated to the front half (40a) (41a) and the rear half (40b) (41b), respectively. (42) is a bolt seat provided on each joining peripheral portion of the horizontally long case (40) and the vertically long case (41), and (43) is a joining bolt.

As shown in FIGS. 9 to 11, the horizontally long case (40) has a horizontally long elliptical cross section and a rear half (40).
The connection flange (40c) is integrally formed only on the inner edge of b), and only the base end of the rear half (40b) can be connected to the side of the transmission case (13) via the connection flange (40c). The first half (40a) is connected to and supported by the second half (40b). (40d) is a connecting bolt.

In this embodiment, a horizontally long case on the left and right sides is used.
In order to provide the compatibility of (40), the right side long case (40) shown in FIG. 10 is configured as described above, but the left side long case (40) shown in FIG. , First half (40
a) and the latter half (40b) are reversed.

Accordingly, by removing the front half (40a) not connected to the side surface of the transmission case (13) from the rear half (40b), maintenance can be easily performed, and assembling workability and maintainability can be improved. .

Further, since only the rear half (40b) is connected to the side surface of the transmission case (13), even if there is a dimensional error in the joint surface between the two, the sealing performance can be ensured.

Further, in this embodiment, since the front axle case (15) is formed by non-working aluminum die-casting, machining of the mating surface is not required, so that the weight and cost can be reduced. it can.

In the horizontal case (40), the horizontal axis (4
4), and the upper inner peripheral surface of the horizontally long case (40) is connected to the transmission case (13) with the upper inner peripheral surface of the horizontally long case (40) close to the horizontal shaft (44). The space directly above is increased to secure the space for the clutch pedal arm (33a) and brake pedal arm (34a).

Further, (45) is a vertical axis as a transmission shaft suspended in a vertically long case (41), and the vertical axis (45) is the horizontal axis.
The upper end is connected to the outer end of the (44) via bevel gears (44a) and (45a), while the lower end of the front axle (16a) is connected to the bevel gear (45a).
b) Linked through (16b).

The upper end of the vertically long case (41) is provided with the structure shown in FIG.
As shown in FIG. 12, a knuckle arm (46) protrudes rearward and a stopper (47) is provided at the base of the knuckle arm (46), while a stopper receiving member is provided at the tip of the horizontally long case (40). A portion (48) is provided, and a stopper (47) is brought into contact with the receiving portion (48), so that rotation of the knuckle arm (46) inward can be restricted.

With the above configuration, the following functions and effects are produced.

That is, the front axle case (15)
Is divided into a first half (40a) (41a) and a second half (40b) (41b), so that the horizontal axis (4
4) and vertical axis (45) can be easily installed, and the first half
(40a) (40b) and the same part (1
The joining bolt (43) can be screwed and joined in a direction orthogonal to the axis of 5).

Therefore, a space for disposing the brake pedal arm (34a) around the horizontally long case (40) of the front axle case (15) can be secured, and the stroke of the arm (34a) can be increased. .

In this embodiment, the transmission case (1
3) is configured as follows. That is, as shown in FIGS. 13 to 16, the transmission case (13) has a left half (50) and a right half (51) that can be joined and separated freely into two parts, and the right half (51). ) Is integrally formed with a right half portion (91) of a steering transmission case (27) described later. (84)
Is a joining bolt.

Then, the left half of the mission case (13)
As shown in FIG. 16, between the (50) and the right half (51), the planted transmission shaft (52), the main transmission shaft (53), and the auxiliary transmission shaft (54).
And the front wheel differential device (55) are mounted on a shaft at a fixed interval from each other, and one end (56a) is protruded outward on the left side on the front side of the left half (50) so that the input shaft (56 ).

The input shaft (56) has one end (56a) connected to the engine (1).
While linked to 1) via a linked mechanism (57),
Attach the input gear (56b), and attach the input gear (56b) to the small gear (58a) of the idle gear (58) which is loosely fitted to the left side of the planted transmission shaft (52) in the transmission case (13). Is engaged. (58b) is a large gear separately provided on the idle gear (58). Small gear (58a) and large gear (58b) of the above idler gear (58)
The large gear (59) and the small gear (60) as auxiliary transmission gears loosely fitted to the left side of the auxiliary transmission shaft (54) mesh with each other, and are interposed between the two gears (59) and (60). By sliding the shift shifter (61) attached to the sub-transmission shaft (54) in the axial direction, either one of the gears (59) (60) and the sub-transmission shaft (54) can be selectively interlocked. I have.

On the right side of the auxiliary transmission shaft (54), a separate first transmission gear (62), a second transmission and traveling first transmission gear (63), and a second traveling transmission gear are separately provided. (64) and attach the main transmission shaft (5) to the traveling first transmission gear (63) and traveling second transmission gear (64).
A large gear (65) and a small gear (66) as main transmission gears spline-fitted to the right side of 3) can be selectively meshed.
A spur gear (67) and a bevel gear (68) as transmission gears are attached to the center of the main transmission shaft (53), and the spur gear (67) is attached to a ring gear (55a) of a front wheel differential device (55). )
The bevel gear (68) meshes with a bevel gear (19a) attached to the tip of a transmission shaft (19) for transmitting power to the rear axle case (17).

With this configuration, the speed of the traveling section (1) can be changed in four stages of forward movement, and also the speed can be changed in reverse.

That is, in the first speed change, the main / sub speed shift arms (70) and (71) shown in FIG. 13 are operated, and the power is changed from the input gear (56b) to the small gear (64) of the idle gear (58). 58a) → gear of auxiliary transmission gear (59) → auxiliary transmission shaft (54) → traveling first transmission gear (63)
→ Gear of main transmission gear (65) → Main transmission shaft (53) → Spur gear of transmission teeth (67) and bevel gear (68) → Ring gear (55a) of front wheel differential device (55) and transmission shaft (19) ) Bevel gear (19a) → front wheels (16) (16)
Is transmitted to the rear wheels (18), (18).

In the second speed change, the shift arm (70) for the main speed change is operated, and the power is changed in the first speed change to the auxiliary speed change shaft (54) → the traveling second speed change gear (64) → the main speed change. It is transmitted to the small gear (66) of the gear.

In the third shift, the main and auxiliary shift arms (70) and (71) are operated, and the power is changed from the input gear (56b) to the idle gear (58) in the first shift. Large gear (58b) →
The transmission is transmitted to the small gear (60) of the auxiliary transmission gear → the auxiliary transmission shaft (54) → the first traveling transmission gear (63) → the large gear (65) of the main transmission gear.

In the fourth shift, the main shift gear (70) is operated to supply power in the third shift to the auxiliary shift shaft (54) → the traveling second shift gear (64) → the main shift. It is transmitted to the small gear (66) of the gear.

In FIG. 16, reference numeral 85 denotes a differential lock device. The differential lock device 85 is spline-fitted to the right horizontal shaft 44, and a ring gear 55a of the front wheel differential device 55 is provided. A meshing portion (85a) that can mesh with the meshed portion (55b) provided on the spring and a spring (85) that presses the meshing portion (85a) in the meshing release direction.
b) and the engagement portion (85a) against the bias of the spring (85b)
A differential lock operating shaft (85c) for sliding the
And a differential lock arm (85d) for operating the operating shaft (85c).

The right half of the transmission case (13) (5
The planting gear case (75) is connected and connected to (1), and the case (75)
The planting transmission shaft (77) is interposed between the planting mission case (76) of the planting part (2) and the planting claw (2a) of the planting part (2) can be planted. And

Then, in the planted gear case (75), the right end (52a) of the planted transmission shaft (52) is extended, and the right end (52a) is extended.
A bevel gear (52b) is mounted on the shaft, and a bevel gear (77a) mounted on the front end of the planted transmission shaft (77) is meshed with the bevel gear (52b).

An implantable transmission gear (80) is spline-fitted to the right side of the implantable transmission shaft (52).
(81), and the planted transmission gear (80) is
According to 2), it is possible to engage with one of the first and second transmission gears (62) and (63) so as to enable the planting speed change (changing the interval between seedlings to be planted).

The running portion (1) can be moved backward by engaging the large gear (65) of the main transmission gear with the back gear (81).

As described above, the axis inside the transmission case (13) is such that the horizontal axis (44) as the front axle axis is located at the rear end, and all other axes are located at the front side. Position the center of gravity of the transmission case (13) on the front side, lower the rear height of the transmission case (13), and lower the ground clearance of the steering transmission case (27) to improve the stability of the aircraft. I can do it.

FIG. 13 shows the transmission case (13).
As shown in FIG. 15, the hydraulic oil suction portion (86)
On the other hand, a hydraulic oil return portion (87) is provided on the upper right rear side to allow the same hydraulic oil to circulate through the transmission case (13) evenly without passing through the hydraulic pump.

As shown in FIGS. 13 to 15, the steering transmission case (27) has a left half (90) and a right half (9).
1) and a two-part structure that can be joined and separated freely, and as described above, the right half (91) is positioned at the rear upper part of the right half (51) of the transmission case (13) and is integrally formed. I have.

On the other hand, the left half (90) of the steering transmission case (27) is, as shown in FIG.
The rear upper portion of the left half portion (50) of the transmission case (13) is formed in a substantially right triangular shape having an inclined surface.

That is, the rear portion of the steering transmission case (27) supports the upper end of a pitman arm shaft (28), which will be described later, and extends the rear portion in the same axial direction as the pitman arm shaft (28). Thus, the cantilever support width (L) of the pitton arm shaft (28) by the case (27) is widened.

Therefore, the cantilever support of the pitman arm shaft (28) can be surely performed, so that the pitman arm shaft
Even if the shaft diameter of (28) is reduced, the strength can be secured, and the weight and manufacturing cost can be reduced accordingly.

In the steering transmission case (27), the lower end of the steering shaft (23) is pivotally supported at the front, and the upper end of the pitman arm shaft (28) is pivotally supported at the rear. An intermediate longitudinal axis (92) is suspended between the shaft (28) and the shaft (23), and a lower end of the shaft (23), a middle part of the intermediate longitudinal axis (92), and a pitman arm axis (28). ), The first, second, and third gears (93), (94), and (95) respectively attached to the upper end portion are meshed in parallel. (23 ') is a shaft case.

Also, the lower end of the pitman arm shaft (28)
As shown in FIG. 12, the steering mechanism (25) for interlocking the knuckle arm (46) attached to the vertically long case (41) of the front axle case (15) has a pitman arm shaft (2).
Attach the front end of the pitman arm (96) to the lower end of (8) in an orthogonal state, and connect the tie rods (97) (9
7) is connected. (97a) and (97b) are rod connecting pins.

The steering shaft (23), the pitman arm shaft (28), and the longitudinal axis (45) are arranged in front and rear parallel, while the transmission shaft (19) and the pitman arm (96) are tilted from front to back and low. And the pitman arm shaft (28) and the transmission shaft (19) are arranged in an orthogonal state.

Thus, the transmission shaft (19) and the transmission shaft (19)
This prevents interference with the pitman arm (96) that swings right and left just below (19) and makes the component configuration compact.

Reference numeral (160) shown in FIGS. 17 to 19 is an automatic differential lock mechanism. The differential lock mechanism is provided in a lever insertion hole (161) provided in a casing body (20) located below the right side of the seat (26). Insert the lever (162) in the vertical direction and
At the upper end of (62), a grip (163) is provided, while the lever (16) is
At the lower end of 2), connect the pivot pin (16
4), one end of the L-shaped lever (165) pivotally supported is connected, and the other end of the L-shaped lever (165) is connected to a tension spring (16).
7), one end of a connecting rod (168) is connected to the other end of the spring (167), and the other end of the rod (168) is connected to the tip of a differential lock arm (85d) of a differential lock device (85). Are linked. (172) is a connecting pin.

In the lever insertion hole (161), a locking pin insertion portion (170) through which a locking pin (169) mounted in a transversely penetrating state in the middle of the differential lock lever (162) can be inserted. A locking pin locking portion (171) through which only the locking pin (169) can be inserted is provided.

With this configuration, the differential lock lever (16
2) is pulled upward, and the locking pin (169) is passed through the locking pin insertion portion (170), and is slid laterally so that the locking pin (169) is moved to the locking pin locking portion (170). L-shaped lever (165), tension spring (167)
And the differential lock arm (85) via the connecting rod (168).
d) to rotate the differential lock device (85)
(167) It is possible to maintain the state in which the differential lock is possible by the tension urging force.

In the differential lock enabled state, the differential lock operating support shaft (85c) presses the meshing portion (85a) in a direction of engaging the meshed portion (55b) against the urging force of the spring (85b). When the front wheel differential device (55) is differential, the meshing portion (85
a) meshes with the meshed portion (55b), and immediately the differential lock device (85) differentially locks the front wheel differential device (55).

Therefore, the operator needs to operate the front wheel differential device.
If the differential lock of (55) is deemed necessary, pull up the differential lock lever (162) in advance to bring it into the above-mentioned differential lock enabled state, and the differential lock can be performed automatically, and other operations and operations can be performed. In such a case, there is no need to perform the differential lock operation in a hurry, and an accident can be prevented from occurring.

The rear axle case (17)
And the upper half (100) and the lower half (101) as shown in FIG.
The bottom of the rear axle case (17) is formed in a smooth shape without any protrusions, and the minimum ground clearance of the rear axle case (17) (ground clearance at the bottom)
Is higher.

Therefore, there is no adverse effect on the sensitivity of the center float, no streaking in the field, no dust or straw debris falling on the field is caught, There is an effect that there is no gradient at the bottom, and irregularities on the bottom or top surface can be freely taken (not undercut).

Then, in the rear axle case (17),
The clutch / brake shaft (102) is mounted on the front part, the left and right rear axles (18a) (18a) are mounted on the rear part, and both shafts (102) (18a) are mounted.
An intermediate shaft (103) is suspended between the shafts. The central portions of the shafts (102) and (103) and the inner ends of the left and right rear axles (18a) and (18a) are first, second, and third, respectively. The bearing is supported by bearing bosses (104), (105) and (106).

A transmission shaft having a front end connected to a transmission case (13) is provided at a front end of the rear axle case (17).
(19) The rear end (19b) is pivotally supported, a transmission bevel gear (19c) is attached to the rear end (19b), and the clutch and brake shaft (102) is mounted on the transmission bevel gear (19c). Passive bevel gear mounted in the center
(107) is engaged.

Further, cylindrical gears (108) (109) are slidably fitted in the axial direction on the left and right sides of the clutch / brake shaft (102), and the two gears (108) (109) are Inner outer circumference (108a) (109a)
Are formed on the left and right sides of the passive bevel gear (107).
(107a) constitutes the clutch unit so that it can be engaged and released.

A plurality of push plates (108b) (109b) are mounted on the outer peripheral surfaces of both gears (108) (109) in a radially extending manner.
The push plates (108b) and (109b) are interposed between a plurality of friction plates (110) and (110) provided in the rear axle case (17) at the outer periphery of both gears (108) and (109). It constitutes the brake part.

The operation of the clutch unit and the brake unit is performed by the left and right clutch / brake operating units (111) and (111).

The cylindrical gears (108) and (109) are respectively meshed with intermediate large gears (112) and (112) attached to the intermediate shaft (103), and are separately provided on the left and right sides of the intermediate shaft (103). Rear axle gears (114) and (114) attached to the inner portions of the rear axles (18a) and (18a) mesh with the intermediate small gears (113) and (113) formed on the peripheral surface.

As shown in FIG. 1, the planting transmission shaft (77) is interposed between the transmission case (13) and the planting transmission case (76) of the planting section (2). , A universal joint in the middle
The universal joint (120), which is a bent part, is disposed directly above the rear axle case (17), and the front half transmission is located forward of the universal joint (120). axis
(77b) is arranged vertically above and below the body frame (10) and directly above the horizontally long case (40) of the right front axle case (15) (see FIG. 16).

In this way, the center bending angle of the planting transmission shaft (77) is set to an angle close to 180 degrees. Therefore, the planting transmission shaft
(77) can be rotated substantially in a straight line, so that the planted transmission shaft (77) rotates smoothly and the transmission case (1
The power transmission from 3) to the planting mission case (76) can be performed reliably, and the planting claw (2a) provided in the planting section (2) can be operated at a constant speed to reduce the spacing between planted seedlings. Uniform planting work can be performed.

The transmission shaft (77) in the first half of the planting transmission shaft (77)
The rear end of b) is supported by the body frame (10) via the support (125) immediately below the pivot (3b) of the lower link (3a) of the lifting link mechanism (3). .

In this way, the planting section (2) is brought as close as possible to the traveling section (1), so that the overall length of the body is shortened and the body is made compact.

[0097]

According to the present invention, the following functions and effects are produced.

That is, in the present invention, a casing body forming a floor surface is stretched on the body frame, and the casing body is formed such that the left and right widths are gradually narrowed from the rear end side to the front end side. Since the brake pedal is arranged on the right side of the casing body and the depressing pedal of the brake pedal is arranged so as to extend outward from the right end of the middle part of the casing body, the toe points outward. Therefore, even with the right foot of the operator who tends to step right outward, the brake pedal arm can be smoothly and comfortably and powerfully depressed without causing sideways or twisting of the brake pedal arm. Can be easily adjusted, and the pedal operability can be improved.

Further, by making the left and right widths of the front end side of the casing body as short as possible, the visibility of the field scene in front of the body can be improved, while the left and right widths of the foot pedals are increased. By doing so, the stepping operation can be performed easily and reliably.

[Brief description of the drawings]

FIG. 1 is a side view of a riding rice transplanter having a brake pedal structure according to the present invention.

FIG. 2 is a plan view of the same rice transplanter.

FIG. 3 is a plan view of a brake pedal arm.

FIG. 4 is a side view of the brake pedal arm.

FIG. 5 is a sectional front view of the brake pedal arm fulcrum.

FIG. 6 is a plan view of a clutch pedal arm.

FIG. 7 is a side view of the clutch pedal arm.

FIG. 8 is a partially cutaway rear view of the front axle case.

FIG. 9 is a left side sectional view of the front axle case.

FIG. 10 is a right side sectional view of a front axle case.

FIG. 11 is an end view of a front axle case.

FIG. 12 is an explanatory plan view of a steering mechanism.

FIG. 13 is a plan view of a transmission case.

FIG. 14 is a sectional side view of a transmission case.

FIG. 15 is a right side view of the transmission case.

FIG. 16 is an explanatory sectional view of a transmission case.

FIG. 17 is an explanatory side view of the automatic differential lock mechanism.

FIG. 18 is an explanatory plan view of the differential lock mechanism.

FIG. 19 is a sectional view taken along line II of FIG. 17;

FIG. 20 is a plan view of a rear axle case.

FIG. 21 is an explanatory sectional view of a rear axle case.

[Explanation of symbols]

 (A): Rice transplanter (1): Traveling part (2): Planting part (3): Elevating link mechanism (13): Transmission case (15): Front axle case (17): Rear axle case (40): Horizontal case (41): Vertical case

Continued on the front page (56) References Japanese Utility Model Sho 55-104562 (JP, U) Japanese Utility Model Sho 58-177622 (JP, U) Japanese Utility Model Sho 64-14531 (JP, U) Japanese Utility Model Utility Model No. 2-136755 (JP) , U) Jikken 40-3138 (JP, Y1) (58) Fields investigated (Int. Cl. ⁶ , DB name) B60T 7/04 B60T 7/06

Claims (1)

(57) [Claims] 1. A casing body forming a floor surface is stretched on a body frame, and the casing body is located at a front end side from a rear end side.
The left and right widths are gradually narrowed toward, and the brake pedal is arranged on the right side of the casing body, and the brake pedal is extended outward from the right end of the middle part of the casing body. The brake pedal structure of a rice transplanter for riding, characterized in that it is arranged on