CN1239702A

CN1239702A - Rotary hydraulic grab bucket

Info

Publication number: CN1239702A
Application number: CN 99104253
Authority: CN
Inventors: 管圣林
Original assignee: Individual
Current assignee: Individual
Priority date: 1999-04-30
Filing date: 1999-04-30
Publication date: 1999-12-29

Abstract

The present invention relates to loading machinery, and is especially one rotary hydraulic grab bucket, whose two jaws are closed through rotation around the lower beam. In available technology, grab bucket is closed through drawing the lower beam, and this needs complicated electric and mechanical structure requiring frequent maintenance. In the rotary hydraulic grab bucket, several pairs of swing cylinders are installed on each jaw plate and the output shaft of each swing cylinder has swing arm installed with each pair of cross swing arms supporting the lower beam. After high-pressure hydraulic oil flows into the swing cylinders, the swing arm pairs support the lower beam through relative rotation to complete closing the grab bucket. Without steel cable and with reasonable close mode and simple structure, the grab bucket is applicable to mobile crane and various electric loading machines.

Description

Rotary hydraulic grab bucket

Type of the present invention belongs to loading-unload machine, relates in particular to a kind of reform to the closed groundwork of grabbing bucket, and is a kind of rotary hydraulic grab bucket.

In the prior art, the motor grab complex structure, maintenance is frequent, single, though the twin rope grab structure is simple, but the hoisting mechanism of attaching troops to a unit is complicated equally, the grab bucket of electric hydaulic series is the same with above-mentioned grab bucket, its closed principle all makes grab bucket closed to lift the grab bucket through beam, the through beam here is to the not effect of extracting ability, its weight is burden to the extracting ability on the contrary, the 44th page to the 59th page in technical secondary school's teaching material " large-scale loading-unload machine " on probation publishing as people's railway press in February, 1980 the first edition and Shanghai are played this Kate of sail and are worn and receive the product introduction of mechanical Co., Ltd, the list of the displaying of addressing, duplex type motor grab and electric hydaulic series grab bucket all for this reason mode make grab bucket closed, except that electric hydaulic series, all need to make grab bucket closed with steel rope, rotary hydraulic grab bucket is then changed the mode that lifts the grab bucket through beam, but two jaws are the center with the through beam, the rotation of hydraulic actuator by rotation forces two jaw closures, thereby realizes the switching of grab bucket.

The objective of the invention is to overcome weak point of the prior art provides a kind of structure simpler, closed principle is more rational, rotary hydraulic grab bucket that need not closed rope, what be worth special version is, (number of patent application: 982131399) " rotary hydraulic grab bucket " is not quite similar for this inventing type and my utility model patent of application, this inventing type with oscillating oil cylinder by be loaded on the grab bucket jaw side plate on, to alleviate the weight of through beam, the change of this position is very necessary, and it will more be applicable on the electrodynamic type loading-unload machine.

Method of the present invention is: be the center with the through beam, is the hydraulic pressure execute file to be fixed on several on each jaw side plate to oscillating oil cylinder, mode by rotation makes grab bucket closed, be specifically described as follows: a kind of rotary hydraulic grab bucket, by suspension ring 11, deck beam 12, through beam 5, jaw 4, compositions such as the side plate 10 of Hubei Province plate and strut 13, it is characterized in that being fixed on several on each jaw side plate to output shaft 3 is arranged on the oscillating oil cylinder 1, one end and the output shaft of swing arm 2 are vertical fixing, and the other end and through beam intersect vertically, and picking-up through beam, so, it is several that will to hold up through beam simultaneously to swing arm be power with high-pressure and hydraulic oil, when swing arm 2 was done rotation relatively with output shaft 3, through beam 5 will be held up, thereby realizes the closure of grab bucket when several.

Purpose of the present invention further realizes in the following manner.When not having high-pressure and hydraulic oil source, rotary hydraulic grab bucket is characterized in that installing on the through beam 5 electrical motor 6, oil pump 7, fuel tank 8 and electromagnetism fuel tap 9.The high-pressure and hydraulic oil that motor drives oil pump 7 produces is input to oscillating oil cylinder 1 by electromagnetism fuel tap 9, and it is closed to finish grab bucket by swing arm.

Rotary hydraulic grab bucket is characterized in that: oscillating oil cylinder can replace with low speed high torque hydraulic motor or other rotary type hydraulic power element.

Type of the present invention compared with prior art has following characteristics:

1, simple in structure, applied widely, because the characteristics of the closed principle of this grab bucket, height can reduce,, it hangs use so being well suited for hydraulic automobile, certain, electrodynamic type also can.

2, this most of element of grabbing bucket all is installed on the lower mechanisms, and is easy to maintenance.

3, identical bucket capacity, under the identical closing period, this used motor power (output) of grabbing bucket is low, and drives when bucket motor and do not change, but energy savings improves electrical machinery life, and because what adopt is fix-displacement pump, thus the selection squirrel cage motor get final product, thereby cost-cutting.

4, overload capacity is strong, and the sanction protection is safe and reliable excessively, mixes the pressure limiting by pass valve on the electromagnetism fuel tap, can play overload protective function.

5, this grab bucket has more the feature of grabbing, and rotates and closure because its two jaws are the center with the through beam.

6, the total weight of this grab bucket all has facilitation to the extracting ability.

7, this grab bucket can be made into the chatter formula, therefore can improve the extracting ability to block.

Description of drawings: Fig. 1 is the main TV structure sketch of grab bucket, A-A view that Fig. 2 is Fig. 1, it is the bottom section sketch, Fig. 3 is the structure diagram that lower mechanisms is equipped with pumping plant, Fig. 4 is the scheme drawing of the closed front and back of grab bucket, and pumping plant is arranged on the strut bar, to increase the weight that the extracting ability alleviates through beam.

More than 1-oscillating oil cylinder, 2-swing arm, 3-output shaft, 4-jaw, 5-through beam, 6-motor, 7-oil pump, 8-fuel tank, 9-electromagnetism fuel tap, the side plate of 10-jaw, 11-suspension ring, 12-deck beam, 13-strut among each figure.

Type of the present invention is described in further detail in conjunction with the accompanying drawings: the best way that realizes these innovation and creation is to utilize existing grab bucket, vertically on several output shafts set up swing arm installing on the side plate of each jaw to oscillating oil cylinder, tilt cylinder, make swing arm hold up through beam simultaneously, utilize hydraulic crane or loader and other pumping plant, high-pressure and hydraulic oil is fed tilt cylinder, by the relative rotation of swing arm, jaw will be closed under the drive of side plate, and promptly grab bucket is closed.

Claims

1, a kind of rotary hydraulic grab bucket, the relative swing that two jaws that it is characterized in that grabbing bucket are done through beam by the swing arm that is fixed on the oscillating oil cylinder (or low speed high torque hydraulic motor) on each jaw side plate, and the closed method of realization, this grab bucket is made up of suspension ring (11) deck beams (12) struts (13) jaws (4) through beams (5) etc., it is characterized in that on several side plates (10) that oscillating oil cylinder (1) are fixed on jaw, there are an end and the output shaft (3) of output shaft (3) swing arm (2) to be vertical fixing on the oscillating oil cylinder (1), the other end is vertical picking-up through beam, when tilt cylinder is swung relatively,, swing arm make grab bucket closed thereby will holding up through beam simultaneously.

2, a kind of rotary hydraulic grab bucket according to claim 1: it is characterized in that through beam (5) last (or any appropriate location) is equipped with motor (6) oil pump (7) fuel tank (8) and electromagnetism fuel tap (9), the relative rotation that motor drives oil pump (7) is imported tilt cylinder (1), output shaft (2) by electromagnetism fuel tap (9) with high-pressure and hydraulic oil will drive the jaw closure, and promptly grab bucket is closed.

3, a kind of rotary hydraulic grab bucket according to claim 1 is characterized in that: the available low speed high torque hydraulic motor of oscillating oil cylinder (1) or other rotary type hydraulic power element replace.

4, a kind of rotary hydraulic grab bucket according to claim 1 is characterized in that the method for closing of this grab bucket is that the center makes grab bucket closed in rotary manner with the through beam.

5, a kind of rotary hydraulic grab bucket according to claim 1 is characterized in that this grab bucket by control electromagnetism fuel tap, can make it become chatter formula closure.