CN201843153U

CN201843153U - Loader and working mechanism thereof

Info

Publication number: CN201843153U
Application number: CN2010205988128U
Authority: CN
Inventors: 高有剑
Original assignee: Doosan Infracore China Co Ltd
Current assignee: Doosan Infracore China Co Ltd
Priority date: 2010-11-05
Filing date: 2010-11-05
Publication date: 2011-05-25
Anticipated expiration: 2020-11-05

Abstract

The utility model provides a loader and a working mechanism thereof; the working mechanism is a six-bar linkage mechanism consisting of a front frame, a movable arm, a rotating bucket oil cylinder, a rocker arm, a connecting rod, a bucket and a lifting oil cylinder; the bucket and the connecting rod are articulated at a first articulated point; the bucket and the movable arm are articulated at a second articulated point; the connecting rod and the rocker arm are articulated at a third articulated point; the first articulated point and the second articulated point determine a first line segment; the first articulated point and the third articulated point determine a second line segment; and a first included angle formed by the first line segment and the second line segment is greater than or equal to 18 degrees and less than or equal to 35 degrees when the working mechanism is located at the unloading position. The utility model has the advantages that the effect of the connecting rod can be enhanced, the impact force during unloading is effectively reduced and the operation comfortability is improved.

Description

Loader and working mechanism thereof

Technical Field

The utility model relates to an engineering machine tool especially relates to a loader and operating device thereof.

Background

The loader is one kind of engineering machinery, and is widely used in engineering fields such as building, road, mine, harbor, etc. The main function of the loader is to perform loading work, which is to dump sand, rocks, ore, and the like into trucks, vans, and containers, but the loader can also perform many other functions such as excavation work, unloading work, soil preparation work, and leveling work.

Fig. 1 is a structural view of a conventional loader, and as shown in fig. 1, a working mechanism of the loader is a space multi-link mechanism that is hydraulically driven and performs a loading and unloading operation. The multi-link mechanism is a six-link mechanism including a front frame 101, a boom 102, a swing cylinder 103, a swing arm 104, a link 105, a bucket 106, and a lift cylinder. The design level of the working mechanism of the loader directly influences the working performance, the working efficiency and the economic index of the loader.

Fig. 2 is a structural view of a working mechanism of a conventional loader, which has two common positions, i.e., a lower transport position in which a bucket 210 is horizontal to prevent scattering and an upper discharge position in which the bucket 210 is overturned, as shown in fig. 2.

At present, the position of a bucket is mostly limited by a bucket limiting block when the domestic loader unloads, the bucket limiting block collides with a movable arm to generate oscillation impact force, the oscillation impact force can enable the unloading to be cleaner, but the impact of the unloading impact force on the whole vehicle is too large, so that the driving comfort is seriously influenced, and the long-term accumulated impact damage to a vehicle body structure is possibly generated. In addition, the conventional loader has the problem that the bucket is unstable and the materials are scattered due to swinging when the working mechanism of the loader is at the transportation position.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model provides a purpose provides a loader and operating device thereof can increase the effect of connecting rod, has effectively reduced the impact force when unloading, has improved the travelling comfort of operation.

In order to achieve the above object, the present invention provides a working mechanism of a loader, the working mechanism is a six-bar linkage mechanism composed of a front frame, a movable arm, a rotary bucket cylinder, a rocker arm, a connecting rod, a bucket and a lift cylinder, the bucket and the connecting rod are hinged at a first hinge point, the bucket and the movable arm are hinged at a second hinge point, the connecting rod and the rocker arm are hinged at a third hinge point, the first hinge point and the second hinge point determine a first line segment, and the first hinge point and the third hinge point determine a second line segment;

and in the state that the working mechanism is positioned at the discharging position, a first included angle formed by the first line segment and the second line segment is more than or equal to 18 degrees and less than or equal to 35 degrees.

Preferably, in the above-described operating mechanism, the first angle is not less than 25 degrees and not more than 30 degrees.

Preferably, in the above working mechanism, the first included angle is equal to 27 degrees.

In the above-described operating mechanism, a second angle formed by the first line segment and the second line segment is preferably equal to or greater than 145 degrees and equal to or less than 162 degrees in a state where the operating mechanism is located at the discharge position.

Preferably, in the above working mechanism, the second included angle is equal to 153.

In order to achieve the above object, the present invention further provides a loader, including a working mechanism, the working mechanism is a six-bar linkage mechanism composed of a front frame, a movable arm, a rotary bucket cylinder, a rocker arm, a connecting rod, a bucket and a lift cylinder, the bucket and the connecting rod are hinged at a first hinge point, the bucket and the movable arm are hinged at a second hinge point, the connecting rod and the rocker arm are hinged at a third hinge point, the first hinge point and the second hinge point determine a first line segment, and the first hinge point and the third hinge point determine a second line segment;

Preferably, in the loader described above, the first angle is 25 degrees or more and 30 degrees or less.

Preferably, in the loader, the first included angle is equal to 27 degrees.

In the above loader, preferably, in a state where the operating mechanism is located at the unloading position, a second angle formed by the first line segment and the second line segment is equal to or greater than 145 degrees and equal to or less than 162 degrees.

Preferably, in the loader, the second included angle is equal to 153.

The embodiment of the utility model provides a there is following technological effect at least:

1) the utility model discloses a loader operating mechanism has increased the connecting rod to the effect moment of scraper bowl through the first contained angle alpha 1 of increase conduct position drive angle of unloading, and the impact force when effectively offsetting unloading has improved the travelling comfort of operation, has reduced the long-term accumulation harm of the impact force of unloading to the loader.

2) The utility model discloses a loader operating mechanism is through the second contained angle alpha 2 that reduces the transportation position, changes the effort of fighting the hydro-cylinder to the scraper bowl when effectively having increased the transportation for it is more firm that the scraper bowl is received to fight, has reduced the unrestrained material in the transportation, has improved the operating efficiency.

Drawings

FIG. 1 is a block diagram of a prior art loader;

FIG. 2 is a block diagram of a conventional loader operating mechanism;

FIG. 3 is a structural diagram of the working mechanism of the present invention;

FIG. 4 is a force analysis diagram of the working mechanism of the present invention in the unloading position;

fig. 5 is a stress analysis diagram of the working mechanism in the transportation position according to the present invention.

Detailed Description

To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the following detailed description of specific embodiments will be given with reference to the accompanying drawings.

The utility model discloses the operating mechanism of loader is the six link mechanism that comprise preceding frame, swing arm, rotary bucket hydro-cylinder, rocking arm, connecting rod, scraper bowl and lift cylinder, and fig. 3 is the utility model discloses an operating mechanism's structure chart, as shown in fig. 3:

the bucket 310 and the link 320 are hinged at a first hinge point a, the bucket 310 and the movable arm 330 are hinged at a second hinge point B, the link 320 and the rocker arm 340 are hinged at a third hinge point C, the first hinge point a and the second hinge point B define a first line segment AB, and the first hinge point a and the third hinge point C define a second line segment AC; wherein,

when the working mechanism is located at the discharging position, a first included angle alpha 1 formed by the first line segment AB and the second line segment AC is greater than or equal to 18 degrees and less than or equal to 35 degrees.

In the angle range, the first included angle α 1 is greater than 17 degrees, which is generally adopted by the conventional loader, as shown in fig. 4, which is a stress analysis diagram of the working mechanism, the acting force on the connecting rod 320 is F, and the moment generated by the acting force F on the bucket 310 is Fsin α 1, so that the first included angle α 1 is a transmission angle of the unloading position, and the larger the first included angle α 1 is, the larger the acting moment of the connecting rod on the bucket is, the more stable the bucket is, and the more the impact force during unloading can be offset. Therefore, the utility model discloses an increase first contained angle alpha 1, increased the position transmission angle of unloading, impact force when effectively reducing to unload.

In addition, when first contained angle α 1 is more than or equal to 25 degrees and less than or equal to 30 degrees, the effect can be better, the utility model discloses a first contained angle α 1 is preferred 27 degrees.

As shown in fig. 3, in a state where the working mechanism is located at the transport position, a second included angle α 2 formed by the first line segment and the second line segment is equal to or greater than 145 degrees and equal to or less than 162 degrees. Fig. 5 is a stress analysis diagram of the working mechanism in the transportation position according to the present invention. As shown in fig. 5, the moment applied to the bucket 310 by the force F on the link 320 is Fsin (180- α 2), and the smaller the second included angle α 2, the greater the moment applied to the bucket by the link, and the more stable the bucket.

And this angle scope of second contained angle alpha 2 is less than the 163 degrees that current loader adopted usually, consequently, the utility model discloses a reduce second contained angle alpha 2, increase the moment of action of connecting rod to the scraper bowl for the scraper bowl is received and is fought more firmly, has reduced the unrestrained material in the time of the transportation, has improved the operating efficiency.

In the present invention, the second angle is preferably 153 degrees.

In addition, the utility model also provides a loader, including the operating device, the operating device is the six-bar linkage that constitutes by preceding frame, swing arm, rotary bucket hydro-cylinder, rocking arm, connecting rod, scraper bowl and lift cylinder, the scraper bowl with the connecting rod articulates at first pin joint, the scraper bowl with the swing arm articulates at the second pin joint, the connecting rod with the rocking arm articulates at the third pin joint, first pin joint and the second pin joint confirm first line segment, first pin joint and the third pin joint confirm second line segment;

From the above, the utility model discloses have following advantage:

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims

1. The working mechanism of the loader is a six-link mechanism consisting of a front frame, a movable arm, a rotating bucket oil cylinder, a rocker arm, a connecting rod, a bucket and a lifting oil cylinder, wherein the bucket and the connecting rod are hinged at a first hinge point, the bucket and the movable arm are hinged at a second hinge point, the connecting rod and the rocker arm are hinged at a third hinge joint point, the first hinge point and the second hinge point determine a first line segment, and the first hinge point and the third hinge joint point determine a second line segment; it is characterized in that the preparation method is characterized in that,

2. The operating mechanism of a loader of claim 1 where said first included angle is equal to or greater than 25 degrees and equal to or less than 30 degrees.

3. The operating mechanism of a loader of claim 2 where said first angle is equal to 27 degrees.

4. The operating mechanism of a loader as claimed in claim 1, 2 or 3,

and in the state that the working mechanism is positioned at the discharging position, a second included angle formed by the first line segment and the second line segment is larger than or equal to 145 degrees and smaller than or equal to 162 degrees.

5. The operating mechanism of a loader as set forth in claim 4 wherein said second included angle is equal to 153.

6. A loader comprises a working mechanism, wherein the working mechanism is a six-link mechanism consisting of a front frame, a movable arm, a rotating bucket oil cylinder, a rocker arm, a connecting rod, a bucket and a lifting oil cylinder, the bucket and the connecting rod are hinged at a first hinge point, the bucket and the movable arm are hinged at a second hinge point, the connecting rod and the rocker arm are hinged at a third hinge joint point, the first hinge point and the second hinge point determine a first line segment, and the first hinge point and the third hinge joint point determine a second line segment; it is characterized in that the preparation method is characterized in that,

7. The loader of claim 6, in which said first included angle is equal to or greater than 25 degrees and equal to or less than 30 degrees.

8. The loader of claim 7, in which said first included angle is equal to 27 degrees.

9. The loader of claim 6, 7 or 8,

10. The loader of claim 9, in which said second included angle is equal to 153.