JPS63138023A - Fitting device for front loader - Google Patents

Abstract

PURPOSE:To prevent the occurrence of abnormal loading during operation by providing a movable part in the back and forth directions of a mast for a fitting means to attach or detach the mast and a mast receiver when a loader is attached to or detached from the tructor body. CONSTITUTION:A turning supporter A restricting the back and fourth movement of a mast 27 and also supporting the lower part of the mast 27 is provided for a mast receiver 22 receiving the load of the mast 27. A cylinder 26a with a pin hole matching the lock pin hole 26 of the mast receiver 22 is fixed to the mast 27 and a stopper pin 26b is inserted into both pin holes 26 to make up a fitting means B. Also, the pin hole 26 of an oblong form (in the back and forth directions) is formed to obtain a movable part. During the operation of a loader, the load in the back and forth directions which burdens the mast 27 is absorbed by the movable part through the means B. Abnormal load can thus be prevented by receiving the load by tension and compression of the mast 27 and a brace 35.

Description

[Detailed description of the invention] (Industrial application field) The present invention relates to a mounting device for a 70 loader.

(Prior technology) Mast supports are fixed to the left and right sides of the tractor body in the longitudinal direction, and a pair of left and right booms each having a working tool at the tip are pivoted to the mast so as to be movable up and down. It is removably attached to the receiver and erected on the left and right sides of the tractor body, fixed to the left mast, and a pair of places are removably attached to the front of the tractor body. The mounting device is disclosed in Japanese Patent Application Laid-Open No. 58-7036 (US
P 4.470.751).

(Problems to be Solved by the Invention) However, in the conventional technology, the lower end of the mast is tapered fitted to the mast holder and cannot be firmly attached with a fastening bolt such as a bolt.

Therefore, abnormal loads during work with a front loader will affect the mast support, and the burden will be heavy.
There were some issues with durability.

When the LL mast and the mast receiver are fixed by tapered fitting and screwing together bolts, it is difficult to achieve accurate fitting when manufacturing errors accumulate, and it is often difficult to insert and pull out the bolts.

The present invention aims to solve the above-mentioned problems by absorbing the load not only by the mast and the mast receiver but also by the elastic deformation of the next place that protrudes from the mast.

[Means for solving problems]

In the present invention, the mast holder is fixed to the left and right sides at the midpoint in the longitudinal direction of the tractor body +11, and the working tool '3'l is attached to the tip.
Square the left pair of games 131) with J! -127
Each of the masses 1-C27+ is removably attached to the mast receiver +22, and is erected on the left and right sides of the tractor body I1+, and fixed to the left and right masts (27). The above-mentioned problems were solved by taking the following technical measures in a front loader mounting device in which a pair of left and right loose eggs are removably attached to the front portion of the tractor body (1).

That is, in the present invention, each of the mast receivers (22) has a rotation fulcrum means (22) for regulating the movement of the mass +-n in the front-back direction and supporting the downward direction. Above the means (A), the mast holder has a mounting means (26C) for removably attaching the prisoner and the mast, and the mounting means (26C) has a movement permitting part (26D+i) of the mass N27) in the front-rear direction. It is characterized by what it does.

(Function) In Fig. 4, when excavating, loading and transporting earth and sand, etc. (loader work) using the working implement while moving the tractor body il+ back and forth, the mast (27) is displayed through the zoom (31). A load is applied in the longitudinal direction.

This load is centered around the rotation fulcrum means (AI) and the mounting means (
26C+, but since the attachment means (26C) has a longitudinal movement permitting part (26Dli), it is absorbed by this, and the gray race egg extending forward from Masudoro moves to the front of the tractor body il+. Since it is attached to the side, the load is received by the mass +-n and the tension/compression of the brace curve, and is distributed between the front and middle parts of the tractor body (11). This prevents excessive force from being applied to the

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

In FIGS. 4 and 5, Ill is a tractor body, and a 70 tractor loader (2) is detachably attached to the tractor body I1+.

The tractor body Il+ is constructed by rigidly connecting seven front axle frames (3), an engine (41), a transmission case (51, etc.), and the engine (41 is covered with a bonnet (61). It is supported by a front wheel (71) and a rear wheel (8), and the rear wheel (8) is supported by a rear axle case (9) protruding from both left and right sides of the transmission case (51).

On both sides of the tractor body +11 in the left direction midway in the longitudinal direction, mast holders are installed in an outwardly extending manner.
It is fixed with + or bolt (Ill) (6th @J, 7th
(see figure). Is this Grakera? tlα and the rear axle case (9) are connected and fixed by a rear connecting member (I21).

Further, this bracket t+01 and front axle 7-ray A t3
+ Ton is connected and fixed by a front connecting member 031.

The front connecting member thread is raised forward from the tlol to the front upper hem 7 (bypassing the I4I).
The first member 5 (and a second member extending horizontally forward from the front end of the first member t15j passing inside and above the front wheel (7), and extending downward from the front end of the second member 061 a sixth member σ sword, and a fourth member Q fixed to the lower end of the sixth member Uη and fixed to the front surface of the front axle frame (3)
It consists of ~. A melon fixing part f211 is formed on this fourth member 1, 181 to which a boss 2Oj having a bottle insertion hole part with a horizontal axis in the left direction is fixed. (Fig. 2, 6
(See Figure 8).

The left pair of mast holders is fixed to the outer end of the GLAKERA L-+101. As shown in Figures 1, 6, 6, and 7, this mast holder is formed into a U-shaped cross section with a front and upper opening, consisting of left and right side walls (C) and a rear wall (1). A pivoting fulcrum protrusion G having a horizontal axis in the left and right direction is provided in the opening between the mast receivers, and the pivoting fulcrum protrusion 25+ is connected to the bin installed between the left and right side walls (C). It consists of

This rotation fulcrum protrusion G is provided as far forward as possible from the rear wall. This rotation fulcrum protrusion 25! In the upper left and right side walls, there are lock bin holes (2
119 It is established as an oval shape that is long in the front and rear directions.

The 70 loader [2+ has a pair of left and right masts n that are removably installed on the mast receptacle. The width of this mast holder is such that the mast holder fits into the opening of the bulk, and a recess that fits into the rotation fulcrum protrusion G is formed on the lower end surface, and continues between the recesses. The kite is flush with the front and rear lower edges. When the mast (b) or the mast holder is fitted from above, this guide surface 4 abuts against the rotation fulcrum protrusion □□□, so that the recessed part (281) fits into the folded part □□□. In addition, the mass l'7) is formed in a shape that guides the lower end. That is, this guide surface is formed to be inclined toward the end of the recess. In addition, the rear end surface of the lower end of the mast is formed into a curved surface part, and the curved surface part and the mast holder are constructed so that they come into smooth contact with the rear wall of the gully. The recess μs and the like constitute a rotation fulcrum means A for regulating (restrainting) the movement of the maston η in the longitudinal direction and supporting it downward.

In addition, the protrusion (25I) is placed on the mast holder (22), and the recessed portion μs
are formed at the lower end of the mass drawer, and may be upside down than shown in the figure.Furthermore, the mass L-e271 is provided with an upright structure that fits into the recess 1281 or the rotation fulcrum protrusion 1251. When the mast holder is a cylinder (26) having a bottle hole that matches the lock bottle hole of the mouth
a) is fixed. Then, a stopper bottle (26b) is inserted into the matching bottle hole from the outside in the lateral direction in a penetrating manner. However, this bottle (26b) and the bottle hole t
281, the mast holder is configured with a mounting means (27c) that is detachably attached to the mast e271', and since the end of the bottle hole is an oblong hole in the longitudinal direction, the mast
- It is a movement permitting part (26D) in the front-rear direction of e271.

In addition, in FIG. 6, (26E) and (26F) indicate collars, which are larger in diameter than the hole width of the bottle hole example, and are
), and is superimposed without being fixed to the outside of the left and right side walls.

At the upper end of the mast n, a pair of left booms 311 projecting forward are pivotally supported by bins (31A), and at the front end of the boom c111, work tools such as packets and scrapers are mounted by bins 318). The zoom '311 of the pivoted cat and the mass? Between f271, the bin (31A)
A drive means is provided for vertically moving the booms all around the transverse axis in the left-right direction with the center at the center. Between this driving means, there is a hydraulic cylinder that connects the middle part of the game (Ill) and the middle part of the mast station.
A hydraulic cylinder example for rotating the work tool is also interposed between the boom 311 and the work tool 32, and the '#X work tool 3z is also rotated about the horizontal axis in the left-right direction by the expansion and contraction movement of the hydraulic cylinder example.

In this case, as shown in FIGS. 9 and 10, a U-shaped bracket 1-(32A) is fixed to the back of the work implement, and the tip of the boom ELL is attached to the bin (32A).
1B), the piston rond end (3) of the hydraulic cylinder example.
4^) is pivotally supported by a bottle (34B), and the bracket (
A flat trapezoidal cover plate (34C) on the upper end surface of 32A)
'By fixing to the bottle (31B), bottle (34
B) etc. are prevented from being entrapped by dirt, etc.

A forward-protruding place 351 is fixed to the vertical midway point of the mast bar. A stand portion extending downward is formed at the front of the place 1. A ground plate opening that can be grounded to the ground is fixed to the lower end of the stand part 361. On the inward side of the lower part of this stand part 13, there is a ground plate opening as shown in Figs. 2, 6, and 8. One racket (381) in the shape of a #r face with a rear opening and an upper opening is fixed, and the lower part of the opening is covered with a stopper plate (39).The opening width of this bracket f381 is the fixed part! The dimensions are such that it can accommodate the boss part of 211). A bottle hole is provided in this pocket +-W and the stand gate to pass through in the left-right direction. This bottle hole is the fixed protrusion! 21) Match with the bottle insertion hole opening and fix the bottle →
υ can be inserted and removed freely, and here is the left pair of masts! 271
The front end of the plate-shaped place/piece that protrudes further forward is fixed to the front side of the tractor unit (1).

In addition, (6) is a drive means; a hydraulic control box that operates a hydraulic cylinder example, and a tractor military body +11
Hydraulic piping from the side is detachably connected.

According to the embodiment of the present invention having the above configuration, the state shown by the imaginary lines in FIGS. 1, 2, and 4 is the normal state in which the front loader (2) is removed from the tractor body +11 and held upright.

To attach the front loader (2) to the tractor body Il+ from this state, the tractor is moved forward and the lower end of the mast loader is positioned within the opening of the mast holder (2). After that, the hydraulic piping between the control boxes and the vehicle body side is connected, and the hydraulic cylinder of the driving means is reduced. As a result, the curved surface part of the lower end of the mast lowers while the mast holder comes into contact with the rear wall of the sphere, and the rotation fulcrum protrusion 251 comes into contact with the guide surface side and slides, causing the mast e271 to slide. The concave portion (C) at the lower end is fitted into the force 5 rotation fulcrum protrusion (251), and by further contracting the sill between the drive means, the rotation fulcrum protrusion !251t - mass l-1
271 rotates, the place skin moves upward, and the fixed part t
1 racket in fits into the end of the boss part of 211, and its downward stopper plate! 391 comes into contact with the boss part casting and stops due to the upward force of the place cost. In this state, the pin insertion hole of the fixed part (21) and the bottle hole of the stand part side match, so insert the fixed bottle ends into both bottle holes (1 spring 140+) and place the pin insertion hole (c-body +11 side). In this state, the mast n, the mast holder is erected, and the lock bin hole □□□ and the mastro pin hole t- gf2
6aJ match, so insert the stopper bin (z6b) t-m into both holes t21E) and install the mast rod and mast holder CI.
Fixing 2〇 (Effect of the invention) The present invention is as described above, and is the mast holder attached to each prisoner? It has a rotation fulcrum means (A) ft for regulating the movement of η in the front-back direction and supporting the downward direction, and above the rotation fulcrum means (A) there are four mast holders and a mast t-removal mechanism. Since it has a mounting means (26C) that can be freely attached, and the mounting means (26C1) has a movement permitting part (26D) i in the front-rear direction of the mast n, the following Advantages ◎The mounting means (26C) between the mast holder and mass 1-+271 has mass 11.
Since the loader 12j has a movement permitting portion (26D) in the longitudinal direction, it is easy to align the loader 12j when the loader 12j is attached to or detached from the tractor body III, and it is also possible to completely absorb some dimensional variations.

17t, the lower end of the mast 2η is supported from below by a direct-acting fulcrum means (AJ) on the mast holder (22), and has a movement permitting portion (26D) on the mounting means (26C). Even if a load is applied to the loader (2) during operation, it is absorbed by the movement permitting part (26D), which is fixed at the mast position and protrudes forward, and is fixed at the front side of the tractor body +11 at the t-place. Because of this, the load on the loader (21) is carried by the Masdro, Place 351, etc., and is eventually shared between the front and rear of the tractor body il+, so unreasonable force is concentrated on the tractor body... There aren't many.

[Brief explanation of the drawing]

FIG. 1 is an enlarged partial cross-sectional view showing the main parts of an embodiment of the present invention;
Fig. 2 is an enlarged section showing the front part of the front loader, Fig. 3 is a sectional view taken along line B-B in Fig. 1, Fig. 4 is a side view showing the overall configuration in the installed state, and Fig. 5 is an explanation of the operation. side view for,
Figure 6 is a plan view showing only a part of the front loader;
The figures are a cross-sectional view taken along the line C-C of Fig. 6, Fig. 8 is an elevated view, and Fig. 9 is a cross-sectional view taken along the line CC of Fig. 6.
The figure is a side sectional view of the packet, and FIG. 10 is a partial plan view of FIG. 9. +11...Tractor body, (21...Front loader, (211...Fixing part,)...Mast holder, (4)
...Rotation fulcrum protrusion, (260...Mounting means, (26
D)...Movement allowance part, 2η...Mast, (281・
... recess, ka) ... guide enclosure, '311 ... game, '3'! J...Working tools. Supply: Drive means, Hide: Place, (AJ: Rotating fulcrum means. Patent applicant: Kubota Iron Works Co., Ltd. Tsuji Figure 2 Figure 2

Claims (1)

[Claims] 1. A mast receiver (22) is fixed to the left and right sides of the tractor body (1) in the longitudinal direction, and a working tool (32) is fixed to the tip of the tractor body (1).
A pair of left and right booms (31) having a diameter are pivotably supported on a mast (27) so as to be able to move up and down, and each of the masts (27) is removably attached to a mast holder (22).
), and a pair of left and right braces (35) fixed to the left and right masts (27) are removably attached to the front part of the tractor body (1), Each of the mast receivers (22) has a rotation fulcrum means (A) for regulating the movement of the mast (27) in the front-back direction and supporting the downward direction. Above the mast holder (22
) and the mast (27) removably.
6C), and the mounting means (26C) has a mast (27
) A mounting device for a front loader, characterized in that it has a movement permitting portion (26D) in the longitudinal direction.