JPH06264465A - Mounting device for tractor and working machine - Google Patents

Abstract

PURPOSE:To perform constantly ordinary mounting of a tractor on a working machine by a method wherein mud flying from a step and the rear wheel of the tractor to a mount part can be protected and mounting and demounting of an upper coupling part on and from an upper part to be coupled are prevented from be impeded by mud. CONSTITUTION:A lower coupling part 14 is arranged to the rear lower part of a tractor and a lower part 35 to be coupled, coupled to the lower coupling part 14, is arranged to the front lower part of a working machine 7 having a step 29 located at a front upper part. An upper coupling part 15 is arranged above the lower coupling part 14 of the tractor. An upper part 38 to be coupled, coupled to an upper coupling part 15, is arranged above the lower part 35 to be coupled of the working machine 7 and in front of the step 29. A mount part cover 71 with which the upper side and the rear side of the upper part 38 to be coupled are covered is arranged on the upper part 38 to be coupled side.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tractor for mounting a working machine such as a backhoe on a tractor and a mounting device for the working machine.

[0002]

2. Description of the Related Art For example, as disclosed in Japanese Patent Laid-Open No. 4-254623, a tractor loader backhoe (TLB) has a rear portion with respect to the tractor in order to improve the versatility of the tractor. The backhoe is detachably attached.

A device for mounting this backhoe is
A lower connecting part is provided in the lower rear part of the tractor, a lower connected part connected to this lower connecting part is provided in the front lower part of the backhoe having a step in the front upper part, and an upper connecting part is provided above the lower connecting part of the tractor. An upper connected portion connected to the upper connecting portion above the lower connected portion of the backhoe and in front of the step, and connecting the lower connected portion to the lower connecting portion and connecting the lower connected portion to the upper connecting portion. By connecting the upper connected portion, the backhoe can be connected to the rear portion of the tractor.

[0004]

By the way, in the backhoe, a step is attached to the upper part of the machine frame, and a control box is arranged in front of this step.
The driver's seat is designed to be used with the seat on the tractor facing backwards. Since the driver sitting in the driver's seat goes up to the step with the mud attached to the shoes, the mud may adhere to the step, and the mud or the mud of the shoes may be scattered forward.

In front of the step, there is a mount portion formed of an upper connecting portion and an upper connected portion, etc. When mud enters the mounting portion, it becomes difficult to operate the mount holder or the like, and the backhoe is attached or detached. It may cause trouble. In addition, the rear wheel of the tractor is located below the front of the mount,
The mud repelled from the rear wheel also scatters from the mount.

According to the present invention, a mount cover for covering the upper side and the rear side of the upper connected portion connected to the upper connecting portion is provided to shield the mud scattered from the step and the rear wheel to the mount portion. An object of the present invention is to provide a mounting device for a tractor and a working machine that are made possible.

[0007]

As a concrete means for solving the problems in the present invention, a lower connecting portion 14 is provided at a lower rear portion of the tractor 1, and a lower connected portion 35 connected to the lower connecting portion 14 is provided. The upper upper connecting portion 15 of the lower connecting portion 14 of the tractor 1 is provided in the lower front portion of the working machine 7 having the step 29 in the upper front portion.
And the upper connected portion 3 connected to the upper connected portion 15 above the lower connected portion 35 of the working machine 7 and in front of step 29.
In the mounting device of the tractor and the working machine provided with 8, the mount portion cover 71 that covers the upper side and the rear side of the upper coupled portion 38 is provided on the upper coupled portion 38 side.

[0008]

When the backhoe (working machine) 7 is mounted on the tractor 1, the mount holder (upper connected portion) 38 of the backhoe 7 is mounted on the mount bar (upper connecting portion) 15 of the tractor 1.
Is fitted to. The mount holder 38 is located in front of the step 29 and above the rear wheel 3 and the upper side and the rear side thereof are covered with a mount cover 71 provided in the vicinity of the mount holder 38. The mud scattered from 3 is shielded by the mount cover 71 and does not enter the mount holder 38.

Since mud does not adhere to the mount holder 38, there is nothing that hinders the fitting and dismounting with the mount bar 15, and the backhoe 7 can be normally attached and detached to and from the tractor 1.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. In FIG. 7, reference numeral 1 is a tractor, which is a front wheel 2 and a rear wheel 3.
The driver's seat 5 is provided behind the steering wheel 4 so as to be capable of changing its posture between a frontward posture and a rearward posture. A front loader 6 is detachably attached to the front portion of the tractor 1 and a backhoe (working machine) 7 is detachably attached to the rear portion thereof.

Reference numeral 8 denotes a vehicle body of the tractor 1, which is mainly constituted by directly connecting an engine, a transmission case and the like, and has a hydraulic device for raising and lowering a working machine at a rear upper portion thereof. 8A shows a rear axle case. Mounting frames 9 for mounting the backhoe 7 and reinforcing the vehicle body 8 are provided on both left and right sides of the vehicle body 8. Each of the left and right mounting frames 9 is a main frame member 10 in the front-rear direction which is fixed to the lower part of the front and rear of the vehicle body 8 and the rear axle case 8A.
And fixed to the left and right of the rear portion of the main frame member 10
0 has a side plate member 11 projecting upward, and the inner surface side of each of the left and right side plate members 11 also serves as a reinforcement for the sunshade device 1
A vertical reinforcing frame 12A used for mounting the two columns is provided, and a plate 13 is fixed to the inner surface of the vertical reinforcing frame 12A. Reference numeral 16 is a fender that is connected to the left and right mounting frames 9.

At the rear end of the main frame member 10, there is formed a U-shaped concave lower connecting portion 14 which is open toward the upper rear side. Above the lower connecting portion 14 and above the side plate member. 11
A horizontal axis mount bar (upper connecting portion) 15 is fixed to the rear of the vertical reinforcing frame 12A between the plate 13 and the plate 13. Figure 1
7 to 7, the machine frame 17 of the backhoe 7 connects a pair of upper and lower main frame members 18, a front frame member 19 that connects the front end parts of the upper and lower main frame members 18, and an intermediate part of the upper and lower main frame members 18. The intermediate frame member 20 and the like.

A swivel frame 21 is attached to the rear end of the upper and lower main frame members 18 so as to be swingable right and left around a vertical axis, and is swivelable by a pair of left and right swivel cylinders 22, and a boom is provided below the swivel frame 21. The base of 23 is pivotally attached to the boom cylinder 2
It is possible to swing up and down by 4. A base portion of an arm 26 that is rotated by an arm cylinder 25 is pivotally attached to the tip end portion of the boom 23, and a bucket 28 is pivotally supported at the tip end portion of the arm 26, and the bucket cylinder 27 swings through a link mechanism. To be done.

A step 29 is provided above the machine frame 17, and a control box 30 is provided on the step 29.
Is installed. In addition, on the left and right sides of the machine frame 17,
An untrigger 32 is provided via a bracket 31 so as to be vertically swingable. Side plates 33 are fixed to the left and right sides of the front portion of the machine frame 17, and a connecting bar 34 having a horizontal axis is provided between the lower portions of the side plates 33.
And the left and right ends of the connecting bar 34 are projected outward from the side plate 33 in the left-right direction.
It penetrates through a downward U-shaped mount guide 37 that is fixed to the outside of the side plate 33 in the left-right direction, and the space between the left and right side walls of the mount guide 37 of this protruding portion is fitted from above into the lower connecting portion 14 provided on the tractor 1 side. It is a lower coupled portion 35 that can be fitted.

The lower portion of the mount guide 37 is bent in a curved shape toward the opposite outside. A reinforcing plate 36 is provided below each side plate 33, and the reinforcing plate 36 is fixed to the lower main frame member 18, the side plate 33, and the connecting bar 34. Each side plate 3
A pair of mount holders (upper connected portions) 38 that are vertically opposed to each other are provided above the lower connected portion 35 of the third connection member 3 and on the outer surface side in the left-right direction. Upper and lower mount holder 38
Is interposed between the side plate 33 and the side wall 71A of the mount cover 71 which is arranged outside the side plate 33 in the left-right direction, and each of the support shafts 4 has an axis in the left-right direction.
It is pivotally supported in the opposite direction via 0, 41, that is, openable and closable.

A support shaft 40 for supporting the upper mount holder 38 is formed between the left and right mount cover 71 to connect the left and right side plates 33,
The support shafts 41 that support the lower mount holder 38 are formed separately on the left and right sides. A tension spring 44 is provided between the upper and lower mount holders 38 and the side plate 33, and the upper and lower mount holders 38 are urged to open toward the tractor 1 (front) side.

On the facing surfaces of the upper and lower mount holders 38,
An arcuate concave portion 45 that fits into the mount bar 15 provided on the mounting frame 9 on the tractor 1 side is formed, and the concave portion 4 is formed.
A restricting surface 46 is formed behind the restricting member 5 to restrict the expansion of the mount holder 38. Further, the restricting surface 46 is notched at the rear side thereof, and the engaging concave portion is open toward the rear. Four
7 are formed. Further, the side plate 33 on the side of the recess 45 is provided so as not to interfere with the mount bar 15.
Is cut out in a U shape, and the mount cover 71 is provided on the side wall 7.
A bulging portion 71D protruding outward is formed on 1A.

A lock member 48 for restricting the expansion of the mount holder 38 when the mount holder 38 is closed is disposed behind the mount holder 38. The lock member 48 has a head portion 49 that fits in the engagement recess 47, and a shaft portion 50 having a front portion fixed to the outer side of the head portion 49 in the left-right direction. An operation lever 55 is rotatably supported on a left and right support shaft 53 fixed to the side plate 33.
An arm 52 that rotates integrally with the shaft 52 is connected to a pin 51 provided in the front portion of the shaft portion 50, and the rear portion of the shaft portion 50 is axially aligned with a support plate 56 fixed to the main frame member 18 of the machine frame 17. The support plate 56 and the pin 51 are movably supported.
A compression spring 57 is fitted between and.

A shaft portion 50 is provided on the rear surface of the support plate 56.
A cylindrical positioning body 58, through which is inserted, is fixed, and holes 59 and 60 are formed at two positions in the front and rear of the positioning body 58. On the other hand, one hole 61 is formed in the shaft portion 50, the lock member 48 is held at the lock position by penetrating the pin 62 with the hole 61 facing the front hole 59, and the hole 61 is inserted into the rear hole 60. The lock member 48 is held at the retracted position by penetrating the pin 62 so as to face the position. The positioning body 58 may be a flat plate, and the rear part of the positioning body 58 may be the bracket 31.
You may connect to.

1 to 6, the mount cover 71 includes a side wall 71A, an upper wall 71B protruding inward from an upper portion thereof, and a back wall 71 protruding inward from a rear portion thereof.
Boss portion 3 having C and protruding from the side plate 33
The upper and lower support shafts 40, which are fixed by bolts 43 screwed to 3A,
41 is pierced and supported. A spring 44 is attached to the boss 33A.
One end of is hooked.

The back wall 71C is located between the mount portion A in which the mount holder 38 is fitted to the mount bar 15 and the step 29 behind the mount portion A, and shields mud scattered from the step 29 side to the mount holder 38 side. And also the upper wall 7
1B is located above the mount portion A and shields the mud that is splashed up from the rear wheel 3 of the tractor 1 and scattered to the mount holder 38 side. Prevents it from getting stuck.

The side wall 71A of the mount cover 71 is also provided.
A dogleg-shaped strip plate 72 is fixed to the outer surface of the plate by welding or the like. The vertical support shafts 40 and 41 are also penetrated and supported by the strip plate 72. When the mount bar 15 and the mount holder 38 are fitted together, the vertical support shafts 40, 4
A force is applied to 1 in the direction of separating, and the mount cover 71
Will be damaged. Therefore, it is necessary to increase the strength of the side wall 71A, and it may be possible to increase the thickness of the side wall 71A.
Are reinforced with.

The mount cover 71 is a side wall 71.
It may be integrally formed with the side plate 33 via A and the upper wall 71B. In the above configuration, when the backhoe 7 is separated from the tractor 1, the backhoe 7 is held in a state where the left and right outriggers 32 and the bucket 28 are grounded, as shown by a virtual line in FIG. 7. At this time, the lower coupled portion 35 on the backhoe 7 side is located above the lower coupling portion 14 on the tractor 1 side.

In order to mount the backhoe 7 on the tractor 1, first the tractor 1 is moved backward and the lower connecting portion 14
Is placed below the lower connecting portion 35, and the outrigger 3
2 is raised, the backhoe 7 is lowered, and the lower connecting portion 3
5 is fitted into the lower connecting portion 14 from above. Then, the lower connected portion 35 is connected to the lower connecting portion 14 rotatably around the axis in the left-right direction.

At this time, the mount holder 38 is in an expanded state as shown in FIG. 5, and the mount bar 15 is located in front of the mount holder 38. Further, the lock member 48 removes the pin 62 to release the holding by the positioning body 58, and the head 49 thereof is brought into contact with the rear surface of the mount holder 38. Next, the arm cylinder 25 or the bucket cylinder 27 is operated to operate the machine frame 17 of the backhoe 7.
Is rotated around the lower coupled portion 35 to bring the mount holder 38 close to the tractor 1 side. And mount bar 15
5 is inserted between the mount holders 38, the rear end of the arc-shaped recess 45 is pressed by the mount bar 15, and the mount holder 38 is closed against the tension spring 44. The mount bar 15 is sandwiched between the upper and lower mount holders 38.

At this time, with the closing operation of the mount holder 38, the engaging concave portion 47 expands, and the engaging concave portion 47.
Is pressed by the compression spring 57 to the head 49 of the lock member 48.
Is inserted, the head 49 is inserted between the mount holders 38 and is sandwiched, and the opening operation of the mount holders 38 is blocked. In this state, by inserting the pin 62 from the front hole 59 of the positioning body 58 and holding the lock member 48 at the lock position, the machine frame 17 of the backhoe 7 is connected and fixed to the mounting frame 9, and the backhoe 7 is attached to the tractor 1. Is installed.

To remove the backhoe 7 from the mounted state, the pin 62 is pulled out and the operation lever 55 is moved backward, whereby the lock member 48 is moved backward and the head 49 is removed from the engaging recess 47. And hold it in the retracted position. Then, in the state where the lock member 48 is held at the position where it is disengaged from the engaging recess 47, the reverse operation is performed.

At the front lower portion of the side plate 33 of the backhoe 7, a mounting gauge means 75 is provided.
The mounting gauge means 75 serves as a guide for operating the outrigger 32 to set the height of the lower connected portion 35 to the lower connecting portion 14 to a required height (a slightly higher position) when the backhoe 7 is attached. To do. That is, while observing the mounting gauge means 75, the height of the backhoe 7 with respect to the tractor 1 is adjusted to a height required for mounting, and the tractor 1
Be careful not to come in contact with or damage the parts even if the is moved backwards, so that it can be easily installed.

The mounting gauge means 7 of the first example shown in FIGS.
5A is formed by a chain 76, the upper end of which is fixed to the side plate 33 by a stopper 77, and the lower end of the chain 5A has a length that is substantially in contact with the ground. A hook 78 is provided on the side plate 33 to hook the lower end of the chain 76 when not needed. If the pin 62 for the lock member 48 is connected to the lower end of the chain 76, it also helps prevent loss when the pin 62 is pulled out.

A second example of mounting gauge means 75B shown in FIG.
Is formed of a bar member 79 in which a midway portion is twisted in a coil shape, the upper end of which is attached to the side plate 33 with a pin 80 and a bolt 81, and the lower end of which is grounded.
When the height of 5 is low, the coiled portion is bent. Mounting gauge means 75C of the third example shown in FIG.
Is formed of a bar member 83 bent in a V shape,
The upper end is swingably attached to the side plate 33 by a pin 84, the lower end is grounded, and is swung rearward when the height of the lower connected portion 35 is low.

The mounting gauge means 75 of the fourth example shown in FIG.
D utilizes the reinforcing ribs 86 on the side surfaces of the outriggers 32 and the ribs 87 provided on the bracket 31, so that both ribs 86,
The height of the lower connected portion 35 is set to be appropriate when 87 are aligned. The mounting gauge means 75E of the fifth example shown in FIG. 12 is used when adjusting the height of the backhoe 7 using the arm cylinder 25,
With the relationship between the swivel frame 21 and the boom 23, it is possible to detect that the height of the lower connected portion 35 has become appropriate,
Angle marks 88 are formed on the swivel frame 21 with paint or the like,
A straight line mark 8 is provided on the upper edge of the boom 23 so as to face the angle mark 88.
9 is formed.

The mounting gauge means 75D of the fourth and fifth examples,
75E is preferably used in combination, and when combined, not only the height of the lower connected portion 35 can be adjusted but also the posture of the backhoe 7 can be adjusted.

[0033]

According to the present invention described in detail above, since the mount portion cover 71 for covering the upper side and the rear side of the upper coupled portion 38 is provided on the upper coupled portion 38 side, the step 29 and the tractor 1 are mounted. The mud scattered from the rear wheel 3 to the mount A can be shielded, and the upper connecting portion 15 and the upper connected portion 38 can be shielded.
The tractor 1 and the work implement 7 can always be normally attached without the soiling of the attachment and detachment of the tractor 1 and the soil.

[Brief description of drawings]

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

FIG. 2 is a cross-sectional plan view of the main part.

FIG. 3 is an enlarged sectional side view of the main part.

FIG. 4 is a perspective view of a mount cover.

FIG. 5 is a sectional side view showing the operation of the mount holder.

6 is a partial cross-sectional plan view of FIG.

FIG. 7 is an overall side view of a TLB.

FIG. 8 is a side view showing a first example of mounting gauge means.

FIG. 9 is a side view showing a second example of mounting gauge means.

FIG. 10 is a side view showing a third example of mounting gauge means.

FIG. 11 is a perspective view showing a fourth example of mounting gauge means.

FIG. 12 is an exploded perspective view showing a fifth example of mounting gauge means.

[Explanation of symbols]

 1 tractor 3 rear wheel 7 backhoe (working machine) 14 lower connecting part 15 mount bar (upper connecting part) 29 step 33 side plate 35 lower connected part 38 mount holder (upper connected part) 71 mount part cover A mount part

Front page continuation (72) Inventor Takashi Yoshii 64 Ishizukitamachi, Sakai City, Osaka Prefecture Kubota Sakai Factory

Claims (1)

[Claims] 1. A lower connecting portion (1) at a lower rear portion of the tractor (1).
4) is provided, and the lower connected portion (35) connected to the lower connecting portion (14) is provided at the lower front portion of the working machine (7) having the step (29) at the upper front portion, and the An upper connecting portion (15) is provided above the connecting portion (14), and above the lower connected portion (35) of the working machine (7) and at the step (2).
9) In a mounting device for a tractor and a working machine, in which an upper connected portion (38) connected to the upper connecting portion (15) is provided in front of the mount, a mount for covering the upper side and the rear side of the upper connected portion (38). A tractor-working machine mounting device, characterized in that a part cover (71) is provided on the upper coupled part (38) side.