JPH06146322A - Frong guard device for front loader mounting type tractor - Google Patents

Abstract

PURPOSE:To provide a front guide device which enables not only protection of the front of a tractor during mounting of a front loader but also dispersion of a force through intercoupling of the tips of right and left braces and besides enables itself to be functioned as a stand when it is separated away from the front loader. CONSTITUTION:A boom cylinder 5 and a brace 6 are coupled to a mast 4 to which right and left booms 3 of a front loader 2 are pivotally supported. A mast mounting mount 8 on which the mast 4 is mounted through the boom cylinder 5 in a state to be varied from a forward inclination posture to a standing-up posture after the lower part of the mast 4 is inserted in a car body 7. A brace coupling body 9 to which the tip of the brace 6 is coupled is protruded from the front of the car body 7. A front guard member 44 vertically extending before the car body 7 and used for intercoupling the tips of the right and left braces 6 in a state that the brace 6 is coupled to the brace coupling body 9. When the mast 4 is brought into a formed-tilting posture, the lower part of the front guard member 44 is touchable on to ground.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a front guard device for a front loader-mounted tractor.

[0002]

2. Description of the Related Art For example, in the case of a tractor, a front loader is mounted and the bucket is used to scavenge dirt and load it on a truck. Therefore, there is an accident such as the front of the tractor hitting the truck, and the front of the tractor is protected. A front guard is provided. The front guard of the prior art is formed separately from the front loader, and stands upright from the front part of the tractor body in front of the hood.

[0003]

In the above-mentioned prior art, the front guard can protect the front surface of the tractor, but this is only its function, and the function of reinforcing the front guard or holding it in a standing posture is not provided. It was of low utility value. The present invention provides a front guard device for a front loader-mounted tractor that can be used not only for protecting the front surface of the tractor but also for connecting the stand and the ends of the left and right brace by providing the front guard vertically at the tip of the brace. With the goal.

[0004]

A concrete means for solving the problem in the present invention is to connect a boom cylinder 5 and a brace 6 to a mast 4 which pivotally supports the left and right booms 3 of the front loader 2, and to connect the vehicle body 7 with the boom cylinder 5. After the lower part of the mast 4 is inserted into the mast 4, a mast mounting base 8 is provided through the boom cylinder 5 in a state in which the mast 4 is changed from the forward leaning posture to the standing posture, and is connected to the front end of the brace 6 from the front of the vehicle body 7 to the front. In a front loader-mounted tractor with a protruding brace connecting body 9, a front guard member 44 is provided which extends vertically in front of the vehicle body 7 while connecting the brace 6 to the brace connecting body 9 and connects the tips of the left and right brace 6 together. ,
The lower part of the front guard member 44 can be grounded when the mast 4 is tilted forward.

[0005]

When the front loader 2 is mounted on the vehicle body 7, the front guard member 44 provided at the front end of the brace 6 is mounted on the vehicle body 7
It is located on the front side and extends in the vertical direction to protect the front surface of the tractor 1 and to connect the tips of the left and right brace 6 to disperse the force applied to the brace 6.

When the boom cylinder 5 is operated to disengage the front loader 2 from the vehicle body 7 and the mast 4 is tilted forward, the brace 6 descends and the lower part of the front guard member 44 comes into contact with the ground to serve as a stand. The front loader 2 separated from is held in a standing posture.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 5, reference numeral 1 is a tractor having a front loader 2 and a cabin 21. The vehicle body 7 is composed of an engine, a clutch housing, a transmission case, a front axle frame 23 protruding from the engine, etc., and the engine is covered with a hood 24. ing. 25 is an operation panel, 2
Reference numerals 6 denote steering wheels, respectively, behind which a driver's seat is arranged, which serves as a control section.

The front loader 2 pivotally supports the base of the boom 3 via a pin on the upper end of the mast 4, and the boom cylinder 5 connected to the middle of the mast 4 enables the boom 3 to move up and down. A work tool 28 such as a bucket is pivotally supported at the tip of the work piece 3, and a work tool cylinder 29 enables a dump / squeeze operation. A brace 6 is projected from the upper part of the mast 4 to the lower front side.

The boom 3, the mast 4, the boom cylinder 5, the brace 6 and the like are paired on the left and right. The middle portions of the left and right booms 3 are connected to each other by a connecting member 51, and the front end thereof is a work implement 28.
Are connected via. As shown in FIGS. 1, 3 and 4, a connecting plate 52 is fixed to the upper ends of the left and right masts 4 and can face the L-shaped bracket 54 protruding from the front support column 53 of the cabin 21. By penetrating the pin 55 through the bracket 52 and the bracket 54, the upper end of the mast 4 is detachably connected to the front support column 53 so as to prevent the mast 4 from spreading in the left-right direction.

By connecting the left and right masts 4 to the front support column 53 to prevent the spread, the front view is improved as compared with the conventional one in which the left and right masts 4 are connected by a single connecting plate. The front windshield of the cabin 21 can be opened and closed, and the front loader can be easily attached and detached. The mast 4 has a U-shaped cross section, and a reinforcing plate member 36 is fixed to the inside thereof, and a U-shaped member or the like is welded to the lower portion thereof to form a substantially J-shaped or V-shaped rotation receiving portion 11. is doing. In addition, a pin hole 37 is formed in the middle of the mast 4 in the vertical direction, and the pin hole 37 is located above the rotation receiving portion 11.

A mast mount 8 is fixed to the left and right midway portions of the vehicle body 7, and a brace connecting body 9 is provided at the left and right front ends of the front axle frame 23, by which the front loader 2 can be freely attached and detached. Is attached to. Each of the left and right mast mounts 8 has a support base 31 fixed to a bracket 30 fixed to a side surface of an engine, a clutch housing and the like by bolts, and the left and right support bases 31 are connected by a connecting member 32.

A stand frame 33, which forms the main body of the mast mount 8, is erected on the support stand 31. The base frame 33 has a U-shaped cross section, is open to the front, and a reinforcing plate member 35 is welded inside thereof. Further, a pin is penetratingly formed in the front part of the upper and lower middle part of the base frame 31 to form a pivot fulcrum part 12, and a connecting pin 13 is penetrated and received in the upper part as a pin receiving part 14. Has a pin hole. When the rotation receiving portion 11 is formed of a U-shaped member, the pins forming the rotation fulcrum portion 12 come into surface contact with each other, and the supporting strength is increased.

In the mast 4, the rotation receiving portion 11 is placed on the rotation fulcrum portion 12 of the base frame 33, and a gap is formed at the lower end thereof so as not to contact the reinforcing plate member 35. The lower end of the mast 4 can be roughened, and the pin receiving portion 14 and the pin hole 37 can be easily matched. By inserting the connecting pin 13 into the pin receiving portion 14 and the pin hole 37, the mast 4 is held on the mast mount 8 in the standing posture shown by the solid line in FIG. 1, and when the connecting pin 13 is pulled out,
As shown by the chain double-dashed line in FIG. 1, it becomes possible to tilt forward around the rotation fulcrum 12.

In each of the left and right bracees 6, a linear strip 38 is provided on a bracket 41 fixed to the mast 4 so as to project forward, and a support plate 39 is projected downward from a front end of the strip 38, and upper ends of the left and right support plates 39 are provided. Are connected by a mountain-shaped protection member 40. An upward concave semi-arcuate member is welded to each inner surface of the left and right support plates 39 to form a fitting body 15. The left and right fitting bodies 15 are separated from each other to the left and right without any intermediate portion.

At the lower ends of the left and right support plates 39, a protective grounding body 42 connecting the left and right is fixed. The protective grounding body 42 is formed of a plate material, a solid rod, a pipe material, or the like, and when the front loader 2 is mounted on the vehicle body 7, in front of the steering tie rod 43 and the steering lever 45 connected to the tie rod 43 and the like. The front loader 2 can be grounded when the front loader 2 is detached from the vehicle body 7 by protecting them at a height or slightly below.

The support plate 39, the protective material 40 and the protective grounding body 42 are in the form of a rectangular frame, and the front guard member 44 is provided.
Are configured. The front guard member 44 not only enhances the support strength of the fitting body 15 but also connects the left and right brace 6 to disperse the force and increase the strength, and is arranged on the front side of the hood 24 when the front loader 2 is mounted. Protects the front surface of the tractor 1 and serves as a stand for the front loader 2 when detached. The protective material 40 and the protective grounding body 42 may be a solid rod or a pipe material other than the strip plate material.

The brace assembly 9 includes a front axle frame 23.
A horizontally elongated round bar member is fixed to the tips of a pair of left and right brackets 48 extending from the front side surface to the front upper side of the fitted portion 16.
The fitted portion 16 is formed to have the same width as or longer than the bonnet 24, and the fitting bodies 15 can be fitted to the left and right ends thereof from below. The fitted part 1
After the fitting body 15 is fitted, the fitting 6 is fixed to the both with a fastener 17 such as a bolt so that the brace 6 is attached to the vehicle body 7.
And the front guard member 44 are fixed, and the fitted portion 16 remains after the front loader 2 is removed, and is located in front of the hood 24 to protect the tractor 1 and other than the front loader 2. It can be used to install work equipment.

In FIG. 2, reference numeral 56 is a control box for operating the boom cylinder 5 and the work implement cylinder 29, and a mounting base 57 is erected from the right support base 31 and mounted on the upper end thereof. 6 and 7 show a modification of the front guard member. This front guard member 44A
The left and right support plates 39 of the front guard member 44 of the above-described embodiment are connected by the reinforcing plate 59, and the protective member 40 is also provided with two reinforcing plates 60 and 61 for connecting the left and right portions to increase the strength. The protective grounding body 42 is inclined forward and upward so as to be grounded when grounded.

Next, the attaching / detaching operation of the front loader 2 with respect to the vehicle body 7 will be described. From the mounted state of the front loader 2 of FIG.
Release the stopper 17 from the mast mount 8 and mast 4
Release the connection with. Then, when the boom cylinder 5 is extended, the mast 4 starts to be rotated from the standing posture to the forward leaning posture with the lower portion thereof in contact with the mast mount 8, and the work implement 28 is displaced forward while keeping contact with the ground. Be done. The work tool cylinder 29 is also operated as necessary.

At this time, the rotation receiving portion 11 makes the rotation fulcrum portion 1
Since the mast 4 remains engaged with the mast 4, the rotation center of the mast 4 becomes the rotation fulcrum portion 12, and at the same time when the attitude of the mast 4 is changed, the brace 6 integrally provided with the mast 4 is fitted to the fitting body 15. The front guard member 4 is detached downward from the portion 16.
4 descends. When the brace 6 descends, the protective grounding body 42 of the front guard member 44 at the tip of the brace 6 is grounded (indicated by the chain double-dashed line in FIG. 1), the brace 6 and the front guard member 44 serve as a stand, and the rotation receiving portion 11 rotates. Move away from the dynamic fulcrum 12. When the tractor 2 is moved rearward in this state, the front loader 2 is grounded by the work implement 28 and the protective grounding body 42 of the front guard member 44, and is held in the standing posture. At this time, the protective grounding body 42 is grounded linearly, but the protective grounding body 42 of the front guard member 44A of the modified example is surface-grounded.

When the front loader 2 is not used for a long period of time or when the standing posture is further stabilized, as shown in FIG. 5, the boom cylinder 5 is further extended so that the front surface of the front guard member 44 is entirely grounded. You can To mount the front loader 2 on the vehicle body 7 from the detached state, the vehicle body 7 is moved to place the mast mount 8 substantially below the mast 4, and the boom cylinder 5 is contracted to move the mast 4 to the mast mount. 8 and inserts the rotation receiving portion 11 into the rotation fulcrum portion 1
Engage 2.

When the boom cylinder 5 is further contracted from that state, the mast 4 is rotated from the forward tilted posture to the standing posture around the rotation fulcrum portion 12, the work implement 28 is pulled toward the vehicle body 7 side, and the brace 6 is moved. The fitting body 15 is fitted into the fitted portion 16 of the brace connector 9 from below. When the mast 4 is in the standing posture, the pin hole 37 of the mast 4 becomes concentric with the pin receiving portion 14 of the mast mounting base 8, and the connecting pin 13 is inserted through them, so that the mast 4 is attached to the mast mounting base 8. It is attached. Further, the fitting body 15 and the fitted portion 16
And are fixed with the stoppers 17.

[0023]

According to the present invention described in detail above, the front guard member 44 extending vertically in front of the vehicle body 7 and connecting the tips of the left and right brace 6 with the brace 6 connected to the brace connecting body 9 is provided. Since the lower part of the front guard member 44 can be grounded when the mast 4 is tilted forward, not only the front surface of the tractor 1 is protected when the front loader 2 is attached, but also the tips of the left and right brace 6 are connected. As a result, the force can be dispersed, and moreover, it can function as a stand when the front loader 2 is removed.

[Brief description of drawings]

FIG. 1 is a side view showing an embodiment of the present invention.

FIG. 2 is a front view of the main part.

FIG. 3 is an enlarged side sectional view of a mast and a mast mount.

FIG. 4 is a view on arrow X in FIG.

FIG. 5 is a side view when the front loader is removed.

FIG. 6 is a front view showing a modified example of a front guard member.

FIG. 7 is a sectional side view of the same.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 tractor 2 front loader 3 boom 4 mast 5 boom cylinder 6 brace 7 vehicle body 8 mast mount 9 brace connecting body 11 rotation receiving portion 12 rotation fulcrum portion 13 connecting pin 14 pin receiving portion 15 fitting body 16 fitted portion 17 Stopper 44 Front guard member

Claims (1)

[Claims] 1. A boom cylinder (5) is attached to a mast (4) pivotally supporting the left and right booms (3) of the front loader (2).
And the brace (6) are connected to each other, the lower portion of the mast (4) is inserted into the vehicle body (7), and then the mast (4) is attached via the boom cylinder (5) in a state in which the mast (4) is changed from the forward leaning posture to the standing posture. A mast mount (8) is provided and the vehicle body (7)
In a front loader-mounted tractor projecting a brace connecting body (9) that is connected to the front end of the brace (6) from the front part, in the state where the brace (6) is connected to the brace connecting body (9), Front guard member (44) extending vertically on the front side and connecting the tips of the left and right brace (6)
And a lower part of the front guard member (44) can be grounded when the mast (4) is tilted forward.