CN215402621U - Mechanical grab bucket opening and closing structure - Google Patents

Abstract

The utility model relates to a mechanical grab bucket opening and closing structure which comprises a first bucket body and a second bucket body, wherein two ends of the first bucket body and two ends of the second bucket body are hinged to a lower support beam through pin shafts, and the first bucket body and the second bucket body are symmetrical along the central axis of the pin shafts; a first joint bearing is installed between the first bucket body and the pin shaft, and a second joint bearing is installed between the second bucket body and the pin shaft. The utility model reduces the abrasion among parts, improves the impact resistance and corrosion resistance of the equipment and further prolongs the service life of the equipment.

Description

Mechanical grab bucket opening and closing structure

Technical Field

The utility model relates to an opening and closing structure of engineering mechanical equipment, in particular to an opening and closing structure of a mechanical grab bucket.

Background

The grab bucket is a kind of load and unload the load taking device of the balk cargo of the hoist, mainly used in the load and unload the work of a large number of balk cargo, apply to cement factory, mine field, stock ground, etc. extensively.

At present, the existing grab bucket opening and closing mechanism mainly comprises a bearing beam, a bucket body, a pin shaft, a pin sleeve, a gland, a thrust pin and the like, wherein the pin shaft and the pin sleeve generate sliding friction in the opening and closing process of the grab bucket, when the bucket body is filled with materials, the friction is increased sharply, and the bucket is easy to lose working performance due to the abrasion of the pin shaft in the gradual use process. It is known from the related data research that abrasive wear is a common failure in grapple applications, and from the related data analysis, it can be found that in the form of grapple failure, about 50% of the pin wear loses performance, about 30% loses performance due to body blade wear, and the remaining 20% loses performance due to pulley wear and other part damage.

Therefore, those skilled in the art have made an effort to develop a mechanical grab bucket opening and closing structure, which reduces wear between parts, and improves impact resistance and corrosion resistance of equipment, thereby improving the service life of the equipment.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a mechanical grab bucket opening and closing structure, which reduces abrasion among parts, improves the impact resistance and corrosion resistance of equipment and further prolongs the service life of the equipment.

The technical scheme for solving the technical problems is as follows: a mechanical grab bucket opening and closing structure comprises a first bucket body and a second bucket body, wherein two ends of the first bucket body and two ends of the second bucket body are hinged to a lower support beam through pin shafts, and the first bucket body and the second bucket body are symmetrical along the central axis of the pin shafts;

a first joint bearing is installed between the first bucket body and the pin shaft, and a second joint bearing is installed between the second bucket body and the pin shaft.

The utility model has the beneficial effects that: the wear-resistant pin sleeve of the mechanical grab bucket opening and closing mechanism is changed into the knuckle bearing, so that the radial bearing capacity of the opening and closing mechanism is improved under the condition of meeting the axial load, the failure probability of a pin shaft is reduced, the use performance and the safety performance are improved, the knuckle bearing has good impact resistance and corrosion resistance, the automatic aligning can be realized, and the service life of the opening and closing mechanism can be effectively prolonged.

On the basis of the technical scheme, the utility model can be further improved as follows.

Further, a bearing gland used for preventing the first joint bearing and the second joint bearing from shifting is installed outside the pin shaft.

Adopt above-mentioned further scheme's beneficial effect be that bearing gland can effectually prevent that first joint bearing and second joint bearing from appearing shifting in the course of the work, reduces the grab bucket vibration.

Further, an end cover is installed at the end part of the pin shaft, and the end cover is abutted to one side of the bearing gland.

The beneficial effect who adopts above-mentioned further scheme is that the end cover not only can protect the round pin axle tip and prevent to be difficult to take out after the round pin axle tip warp, still is used for compressing tightly the bearing end cover, prevents that the bearing end cover from becoming flexible.

Further, the pin shaft is provided with a retaining pin in a radial direction in an abutting mode, and the retaining pin is installed on the lower bearing beam.

The beneficial effect who adopts above-mentioned further scheme is that the stopping round pin acts on the round pin axle footpath, and effectual accurate positioning with the round pin axle prevents that the round pin axle from removing.

Further, first bucket body one end is articulated through first articulated ear and is installed first vaulting pole, second bucket body one end is articulated through second articulated ear and is installed the second vaulting pole, first vaulting pole with the second vaulting pole other end all is connected with last bolster.

The beneficial effect who adopts above-mentioned further scheme is that first vaulting pole and second vaulting pole stimulate first bucket body respectively with the second bucket body rotates along the round pin axle and realizes the grab bucket and open and shut.

Further, still be provided with the oil filler point in the round pin axle, the oil filler point be used for to first joint bearing with the lubricating oil is annotated to the second joint bearing.

Adopt above-mentioned further scheme's beneficial effect to install the oil filler point additional in the middle of the round pin axle, lubricated convenient and fast can effectively reduce wearing and tearing, reduce the fault rate.

Further, a steel wire pulley block is further installed on the lower bearing beam.

Adopt above-mentioned further scheme's beneficial effect be that the wire pulley block is used for the whole grab bucket lift of lifting machinery.

Further, the first bucket body and the second bucket body are provided with reinforcing blocks at the butt joint.

Adopt above-mentioned further scheme's beneficial effect be that the boss is used for first bucket body and second bucket body butt when closing, reduces the direct atress of bucket body butt portion.

Drawings

FIG. 1 is a schematic cross-sectional view of an embodiment of the present invention;

fig. 2 is a schematic structural diagram of an embodiment of the present invention.

In the drawings, the components represented by the respective reference numerals are listed below:

1. a lower bolster; 2. a first bucket body; 3. a second bucket body; 4. a first joint bearing; 5. a second joint bearing; 6. a bearing gland; 7. a pin shaft; 8. a backstop pin; 9. an oil filler hole; 10. an end cap; 11. a first hinge ear; 12. a first stay bar; 13. a second hinge ear; 14. a second stay bar; 15. a steel wire pulley block; 16. and a reinforcing block.

Detailed Description

The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the utility model.

In the description of the present invention, it is to be understood that the terms "center", "length", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "inner", "outer", "peripheral side", "circumferential", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience of description and simplicity of description, and do not indicate or imply that the system or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

As shown in fig. 1 and 2, a mechanical grab bucket opening and closing structure comprises a first bucket body 2 and a second bucket body 3, wherein reinforcing blocks 16 are arranged at the abutting positions of the first bucket body 2 and the second bucket body 3, and when the reinforcing blocks 16 are used for abutting and closing the first bucket body 2 and the second bucket body 3, the direct stress of the abutting portions of the bucket bodies is reduced. The two ends of the first bucket body 2 and the second bucket body 3 are hinged to the lower support beam 1 through a pin shaft 7, the two end portions of the first bucket body 2 and the second bucket body 3 are attached to each other, the first bucket body 2 and the second bucket body 3 are symmetrical along the central axis of the pin shaft 7, and in the embodiment, the connecting portion of the second bucket body 3 and the pin shaft 7 is located outside. In order to improve the wear resistance of the pin shaft 7, the pin shaft 7 can be made of alloy steel with the number of 40 Cr.

The round pin axle 7 radially supports and is provided with stopping round pin 8, and stopping round pin 8 installs on bolster 1 down, and after stopping round pin 8 and round pin axle 7 supported, in the grab bucket working process, the effectual round pin axle 7 that prevents removed along the axis, prevents the condition such as eccentric wear or fracture from appearing in other parts atress inequality. The lower bearing beam 1 is also provided with a steel wire pulley block 15, and the steel wire pulley block 15 is connected with a lifting device through a steel wire and used for integrally lifting the grab bucket.

Install first joint bearing 4 between first bucket body 2 and the round pin axle 7, install second joint bearing 5 between second bucket body 3 and the round pin axle 7, first joint bearing 4 and second joint bearing 5 all adopt the bearing steel to make, and joint bearing not only can effectively reduce the friction between round pin axle 7 and the bucket body, prolongs the practical life between them outside, still has sufficient axial load and radial bearing capacity, and shock resistance is strong. An oil filling hole 9 is further formed in the pin shaft 7, and the oil filling hole 9 is used for filling lubricating oil to the first joint bearing 4 and the second joint bearing 5. In some embodiments, one end of the oil filling hole 9 is located at the end of the pin 7 to facilitate the access of an oil gun, and the other end of the oil filling hole leads to the friction parts of the first joint bearing 4, the second joint bearing 5 and the pin 7, so that the hard friction between the two parts is effectively reduced by lubricating oil, and the service lives of the joint bearing and the pin 7 are prolonged.

Install the bearing gland 6 that is used for preventing first joint bearing 4 and the aversion of second joint bearing 5 outside round pin axle 7, bearing gland 6 not only can effectually prevent first joint bearing 4 and the aversion of second joint bearing 5, can also prevent to cause the bearing card to hinder in the rubbish entering bearing of bearing gland 6 periphery. An end cover 10 is installed at the end part of the pin shaft 7, the end cover 10 is abutted against one side of the bearing gland 6, the end cover 10 can prevent the end part of the pin shaft 7 from being deformed due to impact, and the pin shaft 7 is not dismounted during subsequent dismounting and maintenance.

First 2 one ends of the first bucket body are hinged with a first stay bar 12 through a first hinge lug 11, one end of the second bucket body is hinged with a second stay bar 14 through a second hinge lug 13, and the other ends of the first stay bar 12 and the second stay bar 14 are connected with an upper bearing beam. The first stay bar 12 and the second stay bar 14 are also hinged with the upper bolster, and the first bucket body 2 and the second bucket body 3 are opened and closed under the action of the first stay bar 12, the second stay bar 14 and the sling steel wire.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims (8)

1. The utility model provides a machinery grab bucket opening and closing structure which characterized in that: the bucket comprises a first bucket body (2) and a second bucket body (3), wherein two ends of the first bucket body (2) and two ends of the second bucket body (3) are hinged to a lower bearing beam (1) through a pin shaft (7), and the first bucket body (2) and the second bucket body (3) are symmetrical along the central axis of the pin shaft (7);

first bucket body (2) with install first joint bearing (4) between round pin axle (7), second bucket body (3) with install second joint bearing (5) between round pin axle (7).

2. The mechanical grab opening and closing structure of claim 1, wherein: and a bearing gland (6) for preventing the first joint bearing (4) and the second joint bearing (5) from shifting is arranged outside the pin shaft (7).

3. The mechanical grab opening and closing structure of claim 2, wherein: an end cover (10) is installed at the end part of the pin shaft (7), and the end cover (10) is abutted to one side of the bearing gland (6).

4. The mechanical grab opening and closing structure of claim 3, wherein: the pin shaft (7) is radially abutted with a retaining pin (8), and the retaining pin (8) is installed on the lower bearing beam (1).

5. The mechanical grab opening and closing structure according to any one of claims 1 to 4, wherein: first bucket body (2) one end is articulated through first articulated ear (11) and is installed first vaulting pole (12), second bucket body (3) one end is articulated through second articulated ear (13) and is installed second vaulting pole (14), first vaulting pole (12) with second vaulting pole (14) other end all is connected with last bolster.

6. The mechanical grab opening and closing structure of claim 5, wherein: still be provided with oil filler point (9) in round pin axle (7), oil filler point (9) are used for to first joint bearing (4) with second joint bearing (5) interpolation lubricating oil.

7. The mechanical grab opening and closing structure of claim 5, wherein: and the lower bearing beam (1) is also provided with a steel wire pulley block (15).

8. The mechanical grab opening and closing structure of claim 5, wherein: the first bucket body (2) and the second bucket body (3) are provided with reinforcing blocks (16) at the abutting positions.

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