CN202080817U - Electric six-pawl hydraulic grab bucket - Google Patents
Electric six-pawl hydraulic grab bucket Download PDFInfo
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- CN202080817U CN202080817U CN2011201554425U CN201120155442U CN202080817U CN 202080817 U CN202080817 U CN 202080817U CN 2011201554425 U CN2011201554425 U CN 2011201554425U CN 201120155442 U CN201120155442 U CN 201120155442U CN 202080817 U CN202080817 U CN 202080817U
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Abstract
The utility model relates to an electric six-pawl hydraulic grab bucket. A hanging device is used as a coupling component for the grab bucket and a crane; a box body is arranged under the hanging device, the hanging device is connected with the upper part of the box body through a pin shaft, one end of a hydraulic cylinder is fixedly connected with the upper part of the box body through a pin shaft, the other end of the hydraulic cylinder is fixedly connected with pawls through pin shafts, and the hydraulic cylinder flexes to drive and control actions of the pawls for grabbing and discharging of materials; and the upper ends of guardrails are riveted with the upper part of the box body through rivets, the middle ends of the guardrails are riveted with the middle part of the box body through rivets, the lower ends of the guardrails are riveted with the lower part of the box body through rivets, the guardrails are symmetrically arranged with the box body as a center, and the pawls are connected with the lower part of the box body through pin shafts and are arranged symmetrically with the box body as a center. By adopting the structure, the operation can be facilitated, rapid response can be achieved, the heat and power losses of the system can be reduced, and the operating stability can be improved.
Description
Technical field
The utility model belongs to the elevator machinery technical field, relates to a kind of electronic six lobe hydraulic grabs of self-powered device.
Background technology
Grab bucket is a kind of load-engaging device of automatic extracting article, and it can load and unload a large amount of bulk goods material (as grain, coal, earth, sandstone etc.) and member article (as timber, steel etc.) on the spot.Use loading, unloading, the reprinting efficient that not only can make material to improve greatly on the loading-unload machine, can reduce working strength of workers greatly simultaneously.Along with the development of construction machinery and equipment, a large amount of now electric hydraulic buckets that adopt.Common electric hydraulic bucket pumping station system is controlled to be the pump control, is made up of motor, fix-displacement pump, control cock, by pass valve, oil pipe, oil cylinder etc.Two problems of main appearance: the one, fix-displacement pump output is invariable power in the grab bucket, and according to conservation of energy theorem, kinetic energy has become heat energy, oily temperature rise has become very big noise.Even the grab bucket that has production because oily temperature rise has to stop, allow the oily temperature drop of grab bucket go down.Grab bucket oily temperature rise meeting of fix-displacement pump produces serious consequence, quicken sealing member and oil pipe aging, oil viscosity descends simultaneously, system's internal leakage increases, job insecurity, as pressurize most likely, the goods that is grasped can come off.The 2nd, when fix-displacement pump starts,, can cause the stronger hydraulic efficiency impact in oil pipe junction owing to need certain response time in the valve body, this moment, instantaneous pressure was very high, caused the damage of part in booster or the system easily, made grab bucket produce misoperation, caused engineering accident.
Summary of the invention
The utility model provides a kind of electronic six lobe hydraulic grabs at the deficiencies in the prior art.
The utility model comprises erecting by overhang, electrical motor, hydraulic actuating cylinder, guardrail, Hydraulic Pump, casing, pawl lobe and control cock piece.Erecting by overhang is the connector of grab bucket with hoisting crane; The erecting by overhang below is provided with casing, erecting by overhang is connected with the top of casing by bearing pin, and an end of hydraulic actuating cylinder is fixed by the top of bearing pin and casing, and the other end is fixed by bearing pin and pawl lobe, the telescopic drive of hydraulic actuating cylinder is also controlled the action of pawl lobe, finishes extracting and let-down to material; The upper end of described guardrail and casing top are by rivet together, middle-end and casing middle part are by rivet together, lower end and lower box are by rivet together, guardrail is that one-tenth center, center is symmetrically distributed with the casing, described pawl lobe is connected with the bottom of casing by bearing pin, and the pawl lobe is that the center is centrosymmetric with the casing.
Described electrical motor, Hydraulic Pump and control cock piece are arranged on box house, constitute the hydraulic control unit of electronic six lobe hydraulic grabs.
Described hydraulic control unit also comprises hydraulic control one-way valve RV, pilot overflow valve DV, 3-position 4-way solenoid directional control valve DS, oil filter F, the first endless tube H1 and the second endless tube H2.
The input end of hydraulic control one-way valve RV connects fuel tank, the mouth of hydraulic control one-way valve RV is connected with the input end of Hydraulic Pump, the hydraulic pressure delivery side of pump links to each other with the input end of pilot overflow valve DV, the oil inlet of 3-position 4-way solenoid directional control valve DS respectively, the input end of the first endless tube H1 links to each other with first oil outlet of 3-position 4-way solenoid directional control valve DS, and the mouth of the first endless tube H1 links to each other with the rodless cavity of hydraulic actuating cylinder.
The rod chamber of hydraulic actuating cylinder links to each other with the mouth of the second endless tube H2, and the input end of the second endless tube H2 links to each other with second oil outlet of 3-position 4-way solenoid directional control valve DS; The return opening of 3-position 4-way solenoid directional control valve DS, the mouth of pilot overflow valve DV all are connected with the input end of oil filter F, and the mouth of oil filter F connects fuel tank.
Described Hydraulic Pump is by direct motor drive, described pilot overflow valve DV, and 3-position 4-way solenoid directional control valve DS constitutes the control cock piece.
The beneficial effects of the utility model: the hydraulic control system in the utility model is used the 3-position 4-way solenoid directional control valve, makes whole loop structure simply effective, reduces and repaiies maintenance cost, and the commutation efficient of solenoid directional control valve is higher, and the efficient of system is increased.Simultaneously, the transposition of 3-position 4-way solenoid directional control valve has quick and precisely been avoided the hydraulic efficiency impact in the hydraulic efficiency pressure system, and oil pipe is played a very good protection, and prevents that grab bucket from misoperation taking place, and causes engineering accident.
The utility model has used pilot overflow valve control top pressure, and this pilot overflow valve DV has the regulation and control end, can change the response pressure of by pass valve, the pressure unloading that guarantees whole loop is under the state that can regulate, the materials different for proportion all can play good extracting effect, have enlarged the field of application of this grab bucket.This hydraulic control system has used the meta function of 3-position 4-way solenoid directional control valve to carry out the pressurize of system simultaneously, and is easy to operate, and response is rapid, and the loss of heating of minimizing system and power has increased smooth operation.
Description of drawings
Fig. 1 is the utility model block diagram
Fig. 2 is the utility model physical construction scheme drawing;
Fig. 3 is the utility model fluid control schematic diagram.
The specific embodiment
Below by drawings and Examples, the technical solution of the utility model is described in further detail.
As illustrated in fig. 1 and 2, a kind of electronic six lobe hydraulic grabs are grab buckets of a kind of self-powered device.Electronic six lobe hydraulic grabs are mainly by erecting by overhang 1, electrical motor 2, and hydraulic actuating cylinder 3, guardrail 4, Hydraulic Pump 5, casing 6, pawl lobe 7 and control cock piece 8 are formed.
Erecting by overhang 1 is the connector of this grab bucket with hoisting crane, and erecting by overhang 1 is connected with the top of casing by bearing pin.Casing 6 is base paries of this grab bucket, and various equipments all are connected and fixed with casing 6.Guardrail 4 is that one-tenth center, center is symmetrically distributed with casing 6; the upper end of guardrail 4 and casing 6 tops are by rivet together; middle-end and casing 6 middle parts by rivet together, lower end and casing 6 bottoms by rivet together, guardrail 4 plays the effect of supporting with the protection casing.Pawl lobe 7 is work pieces, has six lobes, is that one-tenth center, center is symmetrically distributed with casing 6, and pawl lobe 7 is shaped as water lily shaped, and the lines flow smoothly, and when six pawl lobes were all closed, pawl lobe bottom gathered together.Pawl lobe 7 contacts an end is fixed on casing 6 with bearing pin bottom with the material that grasps, be fixed together with bearing pin and hydraulic actuating cylinder 3 in addition, making Hydraulic Pump 5 drive stretching of hydraulic actuating cylinder 3 by electrical motor 2 drives and controls the work of pawl lobe 7, finish extracting and let-down to material.The other end and the upper rack of hydraulic actuating cylinder 3 are fixed together by bearing pin, become the attachment point of hydraulic actuating cylinder 3.
Fig. 2 is the mechanical construction drawing of this grab bucket, and its principle of work is: when energized, electrical motor 2 is started working, and oil enters the control cock piece 8 of hydraulic efficiency pressure system through check valve, arrives hydraulic actuating cylinder 3 again.By the regulating action of control cock piece 8, it is poor to make hydraulic actuating cylinder 3 both sides produce oil pressure, makes fore and aft motion thereby promote hydraulic actuating cylinder.Because it is rigidly connected that hydraulic actuating cylinder and corpus unguis pass through hinge, so the fore and aft motion of hydraulic actuating cylinder can directly guide corpus unguis to finish opens, closure and grasping movement.When corpus unguis opens or sky when grabbing, hydraulic actuating cylinder withdrawal or stretch out, hydraulic actuating cylinder only need overcome the friction force of self friction power and each hinged place of mechanism, and system demand pressure is lower.When corpus unguis was clamped weight, system pressure rose gradually, and pressure surpasses certain value; after being higher than the regulation and control force value of pilot overflow valve; pilot overflow valve is opened, and makes the pump off-load, thereby can make the pressure in the loop remain on a lower scope; reached the effect of pressurize; reduced the hydraulic efficiency pressure system heating, oily temperature is limited in the lower scope, low system noise; preventing that simultaneously sealing member and oil pipe are aging, is very favorable to the protection of hydraulic efficiency pressure system and the use of whole grab bucket.
Fig. 3 is electronic six lobe hydraulic grab fluid control schematic diagrams, number in the figure is expressed as respectively: electrical motor M1, Hydraulic Pump P1, hydraulic control one-way valve RV, pilot overflow valve DV, 3-position 4-way solenoid directional control valve DS, oil filter F, the first endless tube H1, the second endless tube H2, the rod chamber 3-1 of hydraulic actuating cylinder 3, the rodless cavity 3-2 of hydraulic actuating cylinder 3.Wherein label is respectively among the 3-position 4-way solenoid directional control valve DS: the first electromagnet YA1, the second electromagnet YA2, oil inlet P, oil return inlet T, the first oil outlet A, the second oil outlet B.3-position 4-way solenoid directional control valve DS has three control positioies in left, center, right.Oil inlet P among the 3-position 4-way solenoid directional control valve DS links to each other with oil pipe C, oil return inlet T among the 3-position 4-way solenoid directional control valve DS links to each other with oil pipe D, the first oil outlet A among the 3-position 4-way solenoid directional control valve DS links to each other with oil pipe E, the second oil outlet B among the 3-position 4-way solenoid directional control valve DS links to each other with oil pipe F, the first endless tube H1 links to each other with the rodless cavity 3-2 of hydraulic actuating cylinder 3, the second endless tube H2 links to each other with the rod chamber 3-1 of hydraulic actuating cylinder 3, wherein oil pipe C is an oil inlet, oil pipe D is an oil return pipe, and oil return pipe D links to each other with oil filter F.Control cock piece 8 is by pilot overflow valve DV, 3-position 4-way solenoid directional control valve DS, and oil pipe C, oil pipe D, oil pipe E and oil pipe F form, and the fluid control effect is played in whole grab bucket.
When electrical motor M1 works, Hydraulic Pump P1 is by hydraulic control one-way valve RV oil suction from fuel tank, by oil inlet C control of access valve piece 8, first electromagnet YA1 outage in 3-position 4-way solenoid directional control valve DS, during second electromagnet YA2 energising, this moment, 3-position 4-way solenoid directional control valve DS control position was in right position, oil inlet C is communicated with oil pipe E, hydraulic oil enters oil pipe E, enter the rodless cavity 3-2 of hydraulic actuating cylinder 3 by endless tube H2, simultaneously because 3-position 4-way solenoid directional control valve DS control position is in right position, oil return pipe D is communicated with oil pipe F, and the pressure of hydraulic oil reduces, thereby makes the hydraulic oil of the rod chamber 3-1 of hydraulic actuating cylinder 3 enter oil pipe F through endless tube H1, and then entering oil return pipe D, F enters fuel tank by oil filter.Thereby make piston rod overhanging of hydraulic actuating cylinder 4, driven the motion of pawl lobe, realized the closure of grab bucket.Top pressure when grab bucket is closed is determined by pilot overflow valve DV, when the pressure at oil inlet C place reaches the response pressure of pilot overflow valve DV, by pass valve is opened, produce overflow, and when the pressure among the oil pipe C reaches setting value, pilot overflow valve DV makes the pump off-load, thereby guarantees that the pressure in the loop remains in the lower value, has reduced the hydraulic efficiency pressure system heating.
First electromagnet YA1 outage in 3-position 4-way solenoid directional control valve DS, when the second electromagnet YA2 also cuts off the power supply, this moment, 3-position 4-way solenoid directional control valve DS control position was in meta, oil inlet C is communicated with oil return pipe D, and oil pipe E and oil pipe F all do not communicate with in-line and oil return line, thus this moment the hydraulic oil in the hydraulic actuating cylinder 3 pressure remain unchanged, if material is being grasped in grab bucket this moment, be under this packing state, can keep promptly state of grab bucket, convenient transfer and transportation material.Under packing state, the loss in efficiency of hydraulic efficiency pressure system is less, has reduced the cost of grab bucket running, is very favorable to the operational stability of whole hydraulic efficiency pressure system.
First electromagnet YA1 energising in 3-position 4-way solenoid directional control valve DS, during second electromagnet YA2 outage, this moment, 3-position 4-way solenoid directional control valve DS control position was in position, a left side, oil inlet C is communicated with oil pipe F, hydraulic oil enters oil pipe F, enter the rod chamber 3-1 of hydraulic actuating cylinder 3 by endless tube H1, simultaneously because 3-position 4-way solenoid directional control valve DS control position is in position, a left side, oil return pipe D is communicated with oil pipe E, the pressure of hydraulic oil reduces, thereby make the hydraulic oil of the rodless cavity 3-2 of hydraulic actuating cylinder 3 enter oil pipe E through endless tube H2, and then enter oil return pipe D, F enters fuel tank by oil filter.Thereby make the piston rod retraction of hydraulic actuating cylinder 4, driven the motion of pawl lobe, realized opening of grab bucket.Top pressure when grab bucket is closed is determined by pilot overflow valve DV, when the pressure at oil inlet C place reaches the response pressure of pilot overflow valve DV, by pass valve is opened, produce overflow, and when the pressure among the oil pipe C reaches setting value, pilot overflow valve DV makes the pump off-load, thereby can guarantee that also the pressure in the loop remains in the lower value, has reduced the hydraulic efficiency pressure system heating.
This hydraulic control system has been used pilot overflow valve DV control top pressure, and this pilot overflow valve DV has the regulation and control end, can change the response pressure of by pass valve, the pressure unloading that guarantees whole loop is under the state that can regulate, the materials different for proportion all can play good extracting effect, have enlarged the field of application of this grab bucket.This hydraulic control system has used the meta function of 3-position 4-way solenoid directional control valve DS to carry out the pressurize of system simultaneously, and is easy to operate, and response is rapid, and the loss of heating of minimizing system and power has increased smooth operation.
Three kinds of control positioies of the 3-position 4-way solenoid directional control valve DS that the utility model utilizes; realized the pressurize of folding, extracting and the hydraulic efficiency pressure system of pawl lobe; whole hydraulic system structure is simplified greatly; reduced the repeated usage of various hydraulic valves; reduced cost; simplified the oil circuit of whole hydraulic efficiency pressure system simultaneously; be convenient to the maintenance and the maintenance of system; and the transposition of 3-position 4-way solenoid directional control valve DS quick and precisely; avoided the hydraulic efficiency impact in the hydraulic efficiency pressure system; oil pipe is played a very good protection, to all being very favourable on the efficient of whole grab bucket and the smooth operation.
Claims (1)
1. electronic six lobe hydraulic grabs comprise erecting by overhang, electrical motor, hydraulic actuating cylinder, guardrail, Hydraulic Pump, casing, pawl lobe and control cock piece, it is characterized in that: erecting by overhang is the connector of grab bucket with hoisting crane; The erecting by overhang below is provided with casing, erecting by overhang is connected with the top of casing by bearing pin, and an end of hydraulic actuating cylinder is fixed by the top of bearing pin and casing, and the other end is fixed by bearing pin and pawl lobe, the telescopic drive of hydraulic actuating cylinder is also controlled the action of pawl lobe, finishes extracting and let-down to material; The upper end of described guardrail and casing top are by rivet together, middle-end and casing middle part are by rivet together, lower end and lower box are by rivet together, guardrail is that one-tenth center, center is symmetrically distributed with the casing, described pawl lobe is connected with the bottom of casing by bearing pin, and the pawl lobe is that the center is centrosymmetric with the casing;
Described electrical motor, Hydraulic Pump and control cock piece are arranged on box house, constitute the hydraulic control unit of electronic six lobe hydraulic grabs;
Described hydraulic control unit also comprises hydraulic control one-way valve RV, pilot overflow valve DV, 3-position 4-way solenoid directional control valve DS, oil filter F, the first endless tube H1 and the second endless tube H2;
The input end of hydraulic control one-way valve RV connects fuel tank, the mouth of hydraulic control one-way valve RV is connected with the input end of Hydraulic Pump, the hydraulic pressure delivery side of pump links to each other with the input end of pilot overflow valve DV, the oil inlet of 3-position 4-way solenoid directional control valve DS respectively, the input end of the first endless tube H1 links to each other with first oil outlet of 3-position 4-way solenoid directional control valve DS, and the mouth of the first endless tube H1 links to each other with the rodless cavity of hydraulic actuating cylinder;
The rod chamber of hydraulic actuating cylinder links to each other with the mouth of the second endless tube H2, and the input end of the second endless tube H2 links to each other with second oil outlet of 3-position 4-way solenoid directional control valve DS; The return opening of 3-position 4-way solenoid directional control valve DS, the mouth of pilot overflow valve DV all are connected with the input end of oil filter F, and the mouth of oil filter F connects fuel tank;
Described Hydraulic Pump is by direct motor drive, described pilot overflow valve DV, and 3-position 4-way solenoid directional control valve DS constitutes the control cock piece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201554425U CN202080817U (en) | 2011-05-16 | 2011-05-16 | Electric six-pawl hydraulic grab bucket |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201554425U CN202080817U (en) | 2011-05-16 | 2011-05-16 | Electric six-pawl hydraulic grab bucket |
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| Publication Number | Publication Date |
|---|---|
| CN202080817U true CN202080817U (en) | 2011-12-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201554425U Expired - Fee Related CN202080817U (en) | 2011-05-16 | 2011-05-16 | Electric six-pawl hydraulic grab bucket |
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| CN (1) | CN202080817U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102259793A (en) * | 2011-05-16 | 2011-11-30 | 杭州电子科技大学 | Electric six-blade hydraulic grab bucket |
-
2011
- 2011-05-16 CN CN2011201554425U patent/CN202080817U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102259793A (en) * | 2011-05-16 | 2011-11-30 | 杭州电子科技大学 | Electric six-blade hydraulic grab bucket |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111221 Termination date: 20140516 |