JP2980102B2 - Lifting device for moving vehicles - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lifting device for a moving vehicle. The present invention relates to a lifting device for a riding type mobile vehicle that travels in a paddy field, a field, or the like with various working machines attached and detached and performs desired work.

[0002]

2. Description of the Related Art Conventionally, when a heavy object such as a chemical solution tank is mounted on the rear part of a moving vehicle for agriculture, the one mounted on the body frame side is the one disclosed in Japanese Utility Model Application Publication No. And Japanese Patent Application Laid-Open No. 57-94305. Such a device directly mounted on the body frame side has a difficulty in making a large tank at a low mounting position where the mounting position of the tank is narrow. If it is still desired to increase the size, it may be mounted at a high position as shown in Japanese Utility Model Laid-Open No. Sho 57-18469, or may be mounted in order to obtain a plane area at the mounting position.
As shown in Japanese Patent Application Publication No. 8 (1994), there has been no choice but to overhang a large portion rearward. For this reason, as the size increases, the position of the center of gravity of the aircraft increases, and the running posture on uneven terrain becomes unstable, or the front wheel, which is the steered wheel, tends to lift up on uneven terrain due to the increase in rear wheel load, and the running direction becomes It has problems such as being difficult to determine.

[0003]

SUMMARY OF THE INVENTION The present invention is to solve such a problem of the conventional device, and has taken the following technical means. That is, the frame frames 1, 1 facing each other with a predetermined interval left and right are arranged in the front-rear direction to form a main frame 2, and various working machines 57 can be raised and lowered at the rear of the main frame 2 via a lifting link mechanism 37. a mobile vehicle 7 equipped, the elevating cylinder 38 for vertical movement of the lifting link mechanism 37, the left and right framework 1,1
The main frame 2 is disposed substantially horizontally between
Tank 59 at the top and axle case 4 at the bottom
Arranged between these tanks 59 and axle case 4
The lifting cylinder 38 is arranged.

[0004]

[0005]

Embodiments of the present invention will be described below in detail with reference to the drawings. However, the dimensions, materials, shapes, relative arrangements, and the like of the components described in this embodiment are not intended to limit the scope of the present invention only to them unless otherwise specified. , Are merely illustrative examples.

First, based on FIGS. 1 to 4 and FIG.
Configuration, transmission mechanism, and elevating device of moving vehicle 7 as a tractor
Will be described. The main frame 2 is integrally connected to the left and right frame frames 1 and 1 with a reinforcing frame described later in a state where the left and right frame frames 1 and 1 face each other. The frame 1 has a flat front frame 1a at the front and a rear frame 1b at the rear at a U-shaped cross section, but may have the same shape from front to rear as long as the strength and mounting seat surface are satisfied.

An intermediate portion in the front-rear direction of the main frame 2 is formed as a central concave portion 8 projecting downward in a side view. A reinforcing plate for connecting the left and right sides is mounted on the frame 1 which is a bending start portion in front of the central concave portion 8, and a steering pipe 9 is projected from an intermediate portion of the reinforcing plate obliquely upward.

A main transmission case 10 having a transmission gear therein is located at a bending start portion between the frame frames 1, 1, and the transmission case 10 is disposed below the frame frames 1, 1 from below.
Attached to 11,11. . . Is the mounting foot,
It projects integrally outward from the transmission case 10.

[0009] 12 and 12 is a mounting stay protrudes toward the inner side from the upper surface of the framework 1, the transmission case 10 across the mounting stay 12, 12 the lower surface portion and the framework 1 lower surface portion Mounting feet 11, 11. . . Is located
Fastener 13,13. . Mounted via Reference numeral 14 denotes a lower reinforcing frame, which is a U-shaped cross-sectional reinforcing frame for connecting the lower left and right front frames 1a, 1a left and right.

The front axle case 3 is a substantially cylindrical straight member, and its center portion has a protruding shaft 15, 1 in the front-rear direction.
It has 6, in front protrusion shaft 15 parts center metal 17, at the front end opening hole 18 parts of the rear protrusion shaft 16 parts main transmission case 10, respectively Re are journaled freely right reciprocating Re husband. The center metal 17 is attached to the lower surface of the lower reinforcing frame 14.

[0011] are furnished the <br/> front wheel differential device 66 in a case where a little eccentric to the right from between the front and rear protrusion shaft 15 shaft portion of the front axle case 3. 67
Is a precursor shaft for driving the front wheels, and 68 is a bevel gear which meshes with the front wheel differential device 66. Further, the precursor shaft 67 is also linked to the rear wheel differential device 69 described later at the same rotation speed.

Next, an upper reinforcing plate 19 and a lower reinforcing plate 20 for connecting the left and right sides are attached to the upper and lower surfaces of the frame 1 at the rear end of the central concave portion 8. The PTO transmission case 21 is attached to the. At the rear of the main frame 2, the mounting seat plates 22
A plurality of mounting feet 23, 2 protruding in the front-rear direction from a rear axle case 4, which is a substantially cylindrical member, on the lower surface between the left and right mounting seat plates 22, 22.
3. . . Tip of is attached via the fastener.

An input shaft 24 protrudes from the front center of the rear axle case 4 in the left-right direction, and a drive connection shaft 2 is provided between the rear axle case 4 and a traveling output shaft 25 projecting rearward from the main transmission case 10.
6 are connected. Reference numerals 70 , 70 shown in FIG. 8 denote couplers, which are connecting cylinders that are driven to engage with the respective shaft end spline grooves. Bevel gear 71 is provided at the rear of input shaft 24.
Is mounted, and meshes with the rear wheel side differential device 69.

The rear-wheel differential device 69 includes :
It is eccentric to the left from the center in the left- right direction . When the front and rear differential devices are symmetrically mounted as shown in FIG.
Since each of the input shaft rotation directions only reverses, the same differential device can be shared and used, and the cost can be reduced. Left and right of rear axle case 4
The husband Re each Re of the end surface portion, the upper flange 32 fasteners 33, 33 of the final casing 31. . . Mounted via

[0015] the bottom of the long final case 31 in the vertical direction, Hoirubosu 34 toward the outer side is projected to be driven, Ru Tei rear wheel 6 is attached to this Hoirubosu 34 parts. At the front surface of the rear axle case 4, mounting bases 35, 35 are provided at intervals on the left and right. The front base of the lifting link mechanism 37, which is shaped like a letter in a side view, is locked to the mounting base 35 by a pin 36. The lifting link mechanism 37
The pin 36 projecting end side Ru vertically swingable and Is <br/> Re Tei around the.

[0016] 38 is a lifting cylinder which expands and contracts by the hydraulic force, the rear frame 1b and a rear end portion, engaged with a pin 39 on the opposite inner side rear portion of 1b, lifting the front end portion of the side view F-shape Re
The shaft 40 is attached to the middle part of the link mechanism 37, and the lifting cylinder
The hitch 4 at the rear end of the elevating link mechanism
Move one part up and down . To hitch 41 parts of this, various working machine 5
Attach 7 mag. The lifting cylinder 38 is shown in FIGS.
So as to be substantially horizontal on the inside facing the rear frames 1b, 1b.
A pair is arranged in the direction, but if the lift is sufficient, it is one side
It may be. The rear actuator is located below the lifting cylinder 38.
A through case 4 is provided, and a rear case
The tank 59 containing the chemical solution for control described above is detachable.
Be attached.

[0017] 27 is a PTO output shaft, for supplying a driving force to the working machine 57 attached to an end after moving the vehicle 7 is a agricultural tractor. In the illustrated example, the PTO output shaft 27
Since There has been located towards before the pins 36 of the lifting linkage 37 proximal the distance between the working device 57 attached to the end after moving the vehicle 7 and the PTO output shaft 27 becomes long, Do shown
It can be raised higher universal joint bending angle less that Rutotomoni work <br/> industry machine 57 to the working machine side are.

Reference numeral 28 denotes a universal joint, which is the main transmission case 1
An output shaft 29 protruding rearward from above and an input shaft 30 protruding downward and forward of the PTO transmission case 21 are connected. Reference numeral 42 denotes an upper reinforcing frame for mounting a seat, which is composed of a horizontal frame 42a and a vertical frame 42b having an inverted L-shape in side view, and a frame frame 1, 1 of the main frame 2 above the rear axle case 4. From the left and right vertical frames 42b, 42b.
The left and right horizontal frames 42a,
The seat 43 is attached to the upper surface of the horizontal frame 42a.
The fuel tank 44 is attached to the lower surface of the fuel cell a.

[0019] lifting Cylinders 3 8 lifting link mechanism 37 extends to the vicinity of the maximum position is the maximum on dynamic as shown in Figure 6 the phantom line, from which restrict further upward movement by the upward movement restricting mechanism 56, the upper The lifting link mechanism 37 does not come into contact with the seat 43 or the fuel tank 44 above the movement restricting tool 56 and is not damaged. As described above, the front axle case 3
The center portion is of a center pivot type that is swingably supported, and upper end flanges 76 of the final case 45 having substantially the same shape as the rear portion are attached to both end portions in the left-right direction via fasteners (not shown). . At the bottom of the long final case 45 in the up and down direction, Hoirubosu 46 toward the outer side is projected to be driven, the front wheels 5 mounted on the Hoirubosu 46 parts.

On the upper surface of the front axle case 3, which is the front part of the main frame 2, between the front frames 1a, 1a opposed to each other , flat left and right reinforcing plates 53 of thin iron plate are attached. 47 are provided.
A central large hole 54 is formed at the center of the left and right reinforcing plates 53 in the form of a thin iron plate, and small mounting holes 55, 55. . . An output pulley 48 of an engine 47 with a drive shaft facing downward projects from the central large hole 54 between the front frame 1a, 1a facing portion below the central large hole 54, and the mounting seat of the engine 47 is Mounting holes 55, 55. . It is attached to the part via a fastener (not shown).

On the other hand, an input pulley 49 is provided above the front portion of the main transmission case 10, and an interlocking connector 50 such as a V-belt is wound between the pulleys 48, 49. Reference numeral 51 denotes a hood, which covers the outer periphery of the engine 47. Reference numeral 52 denotes a steering handle, which is attached to an upper portion of the steering pipe 9 which is one of the reinforcing frames.

FIGS. 5 to 7 are plan views showing the main parts of the present invention.
FIG. 3 is a front view, a side view, and a perspective view, in which a chemical for control is placed on a floor face plate 58 provided along the upper surface of the frame 1 between the upper side of the central recess 8 of the main frame 2 of the moving vehicle 7 and the lower side of the seat 43. The storage tank 59 is placed. The tank 59 is provided with a recessed portion 60 recessed rearward at the center of the front part, and the seat 43 is inserted into the recessed portion 60.
That is, the tank 59 is formed in a U-shaped tank 59 which is open from the both sides of the seat 43 and extends rearward in a plan view.

[0023] Then, in order to stabilize better hold tank 59, bears the lower rear portion of the swing destination end portion deterministic links 59 of the lifting link mechanism 37 described above. In the figure , the lifting link machine
Support base 61 the box-like in hitch 41 parts of the swinging destination end side of the structure 37
Together with the support of the bottom of the mounting only tank 59, tank 59
Mounting holes (not shown) are opened in both the stay 62 and the support base 61 projecting downward from the bottom surface, and fixed in the front-rear direction with the pins 63.

Further, the recess 60 the front wall surface 64 of the tank 59 front, a fastener 65 made of spring material projecting forwardly, the fastener 65 upward movement restricting mechanism 56 in the lower Insert
Te to prevent the upward movement of the tank 59.

[0025]

According to the present invention, the main frames 2 are formed by arranging opposed frame frames 1 and 1 at predetermined intervals on the left and right in the front-rear direction to form a main frame 2, and a lifting link mechanism 37 is provided at the rear of the main frame 2. a mobile vehicle 7 equipped with various working machines 57 through vertically movably, in which the lifting cylinder 38 for vertical movement of the lifting link mechanism 37, is disposed substantially horizontally between the left and right framework 1,1, Above the main frame 2
Tank 59 at the bottom and axle case 4 at the bottom
And between the tank 59 and the axle case 4
Since the lifting cylinder 38 is disposed, the tank 5
The lifting cylinder 38 is satisfactorily incorporated in the small gap between the axle case 9 and the axle case 4 to minimize the overall vehicle height as effectively as possible, thereby improving the compactness of the vehicle body and increasing the size of the tank 59.

[Brief description of the drawings]

FIG. 1 is an overall side view of a partially cross-sectioned moving vehicle.

FIG. 2 is an overall plan view of FIG. 1 with a partial cross section.

FIG. 3 is an overall front view of the mobile vehicle with a partial cross section.

FIG. 4 is an enlarged perspective view of a main part around a lifting link mechanism.

FIG. 5 is an overall plan view when a tank is mounted.

FIG. 6 is an overall side view of the moving vehicle.

FIG. 7 is an enlarged perspective view of a main part around a partially sectioned tank.

FIG. 8 is an explanatory diagram of a power transmission path.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Frame frame 2 Main frame 3 Elevating link mechanism 4 Rear axle case 37 Elevating link mechanism 38 Elevating cylinder 57 Various working machines 59 Tank

Claims (1)

(57) [Claims] 1. A main frame 2 is provided by arranging frame frames 1 and 1 facing each other at predetermined intervals on the left and right sides in a front-rear direction.
Moving the vehicle 7 equipped with various work machine 57 via a lifting link mechanism 37 at the rear of the main frame 2 vertically movably met
Te, an elevating cylinder 38 for elevating operation of the elevating link mechanism 37, substantially horizontally disposed between the left and right framework 1,1
The tank 59 is provided above the main frame 2.
And an axle case 4 at the bottom,
Between the link 59 and the axle case 4
8. A lift device for a mobile vehicle, wherein 8 is arranged .