CN202247975U

CN202247975U - Variable-amplitude walking excavator

Info

Publication number: CN202247975U
Application number: CN2011204023574U
Authority: CN
Inventors: 王玉立
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-10-21
Filing date: 2011-10-21
Publication date: 2012-05-30
Anticipated expiration: 2021-10-21

Abstract

The utility model discloses a variable-amplitude walking excavator. Four groups of leg mechanisms are respectively supported by the both sides of a rotary base; each group of leg mechanism comprises two parallel-arranged leg swinging rods; the upper ends of the leg swinging rods are hinged below the rotary base; the lower ends of the leg swinging rods are hinged and supported by corresponding walking beams; a leg hydraulic cylinder is hinged between at least one leg swinging rod and the walking beams; hoisting wheel sliding rods are further slidably supported on the walking beams; rotary variable-amplitude hoisting wheels are mounted at the upper ends of the hoisting wheel sliding rods; hoisting hydraulic cylinders are hinged between the hoisting wheel sliding rods and the walking beams; a rotatable track driving wheel is mounted at one end of each walking beam; a guide wheel sliding rod is slidably sleeved at the other end of each walking beam; a guide wheel is mounted at the outer end of each guide wheel sliding rod; a variable-amplitude hydraulic cylinder is hinged between the walking beams and the guide wheel sliding rods; and a track is surrounded above the variable-amplitude hoisting wheels, the track driving wheels and the guide wheels. The excavator has the advantages of stronger climbing function and better adaptability.

Description

Luffing stride excavator

Technical field

The utility model relates to a kind of engineering machinery, relates in particular to the hydraulic crawler excavator that is used for construction work.

Background technology

Hydraulic crawler excavator is a kind of multifunction architecture engineering machinery; It utilizes, and scraper bowl excavates, shovel is adorned soil and stone; Be widely used in the mechanical executions such as construction work, hydraulic engineering, communications and transportation, power engineering and mine excavation; To alleviating heavy manual labor, accelerating construction progress improves the labor productivity enormous function of starting.

Hydraulic crawler excavator mainly partly is made up of equipment, running gear, hydraulic system and electrical control system etc.Wherein running gear has the support of hydraulic crawler excavator concurrently and walks two big functions; Should have good performance, the grade climbing performance of passing through; Thereby make and excavate that function is up on bad ground such as soft or be uneven walks operation; Can also have bigger Area of bearing or less grounding pressure, to improve the stability and the safety of excavator.

Existing hydraulic crawler excavator running gear can be divided into crawler type and rubber-tyred two big classes by its structure.The characteristics of cterpillar drive are that driving force is big, and grounding pressure is little, cross-country ability and good stability, and climbing capacity is strong, flexibility good, so cterpillar drive uses the most general on hydraulic crawler excavator.Cterpillar drive comprises that two crawler belts that lay respectively at the excavator both sides constitute; Every crawler belt stretch-draw is on driving wheel and directive wheel; And driving wheel and directive wheel are rotatably installed on the two ends of walking beam; Walking beam is fixedly installed in the both sides of digger revolving base, and equipments such as excavator driver's cabin, bucket are loaded on the digger revolving base through slew gear pivotally.In existing this structure, the stretch-draw length of excavator both sides crawler belt is always changeless, and the digger revolving base and on equipment, driver's cabin overhead highly also be changeless.Though crawler-mounted excavator has littler grounding pressure than wheel excavator; Stronger climbing capacity; But constantly expanding and extending of hydraulic crawler excavator job area; The operating condition of excavator is more complicated, and this not only requires excavator to change its Area of bearing and grounding pressure with bad operating condition such as be uneven according to ground is soft, with its handling capacity of further enhancing with cross over performance; And require excavator to realize climbing and ascend operation to abrupt slope or step ground, make it to have stronger cross-country ability and climbing ability; Obvious existing hydraulic crawler excavator does not have such work capacity.

The utility model content

The utility model technical problem to be solved provides a kind of luffing stride excavator; It not only can change its ground connection Area of bearing according to the operation ground condition; Obtaining the most reasonably grounding pressure, and can climb the step-like scope of operation in abrupt slope flexibly, have stronger off-road operation performance.

In order to solve the problems of the technologies described above; A kind of luffing stride excavator of the utility model; Comprise rotary table, slew gear, go up swing arm and driver's cabin; Upward swing arm and driver's cabin are supported on the rotary table through slew gear pivotally, respectively are supported with two groups in the both sides of said rotary table and prop up leg mechanism, and two groups of homonymy are propped up leg mechanism and are positioned at same perpendicular figure; Every group is propped up leg mechanism and includes two supporting leg forks that laterally arrange, and the upper end hinge of supporting leg fork is below rotary table, and the lower end of supporting leg fork is then hinged on the walking beam of correspondence, between a supporting leg fork and walking beam, is hinged with landing leg hydraulic cylinder at least; On walking beam, going back sliding bearing has lifting wheel sliding bar, in the upper end of lifting wheel sliding bar rotating luffing lifting wheel is housed, and between lifting wheel sliding bar and walking beam, is hinged with lifting hydraulic cylinder; At walking beam one end rotating crawler driving whell is housed, is connected to the directive wheel sliding bar, directive wheel is housed, be hinged with the luffing hydraulic cylinder between walking beam and the directive wheel sliding bar in the outer end of directive wheel sliding bar at the other end slip cap of walking beam; Crawler belt is around on described luffing lifting wheel, crawler driving whell and the directive wheel.

After adopting said structure, prop up leg mechanism, and every group is propped up the supporting leg fork upper end that laterally arranges in the leg mechanism and is hinged in below the rotary table owing to respectively be supported with two groups in digger revolving base both sides; The leg link lower end is then directly hinged on the walking beam of correspondence; Each group leg mechanism can be under the synergy of landing leg hydraulic cylinder like this, and the whole excavator height of lifting also can be under the effect respectively of corresponding landing leg hydraulic cylinder; Realize that respectively group is propped up the alternately lifting of leg mechanism or fallen; Thereby the bionic type stride that reaches excavator carries out or operation, not only more can be adapted to the operation on uneven ground, and is adapted to the leap operation in the staggered location of ditch.Also owing to adopt an above-mentioned leg mechanism that can replace lifting, landing respectively; When excavator runs into the abrupt slope or the step-like scope of operation; Each supporting leg can be crossed over again in the walking of cooperative alternative formula, realizes that the climbing of excavator is ascended a height, and has highly effective climbing and off-road operation performance; Make and excavate the complicated more operating environment of functional adaptation, thereby expanded the range of application of excavator greatly.Owing on the excavator walking beam, sliding luffing lifting wheel and lifting hydraulic cylinder are housed with rising again; And the walking beam of mutual sliding sleeve and the outer end of directive wheel sliding bar are equipped with crawler driving whell and directive wheel respectively, thereby can regulate the position between luffing lifting wheel, directive wheel and the crawler driving whell three in phase, so both can remain the rate of tension of crawler belt; More can change every crawler belt bearing length and grounding pressure on the ground easily; When soft operation ground, just can keep less grounding pressure like this through increasing excavator crawler belt Area of bearing, and when at more solid Ground Operation; Can reduce the bearing length and the area of excavator crawler belt again; Keep rational grounding pressure, reduce to drive resistance, reduce the purpose of energy consumption thereby reach.More owing to organize the flexible synergy of a leg mechanism and luffing caterpillar belt structure, excavator obtains better job stabilization and safety in utilization, has powerful operation compliance and flexibility more.

Description of drawings

Below in conjunction with the accompanying drawing and the specific embodiment the utility model luffing stride excavator is done further detailed explanation.

Fig. 1 is the structural representation of a kind of specific embodiment of the utility model luffing stride excavator;

Fig. 2 is the structure for amplifying sketch map of creeper undercarriage in the structure shown in Figure 1;

Fig. 3 is that the creeper undercarriage crawler belt width of cloth shown in Figure 2 is grown the structure for amplifying sketch map when becoming big;

Fig. 4 is the structural representation of the another kind of working condition of the utility model;

Fig. 5 is the structural representation of another working condition of utility model.

Among the figure, 1-scraper bowl, 2-dipper-arm, 3-scraper bowl hydraulic cylinder, 4-bucket arm hydraulic cylinder, 6-driver's cabin, 7-slew gear, 8-rotary table, 9-supporting leg fork, 10-landing leg hydraulic cylinder, 11-luffing lifting wheel, 12-crawler belt, 13-lifting wheel sliding bar, 14-lifting hydraulic cylinder, 15-walking beam, 16-crawler driving whell, 17-directive wheel, 18-directive wheel sliding bar, 19-luffing hydraulic cylinder, 20-lifting wheel sliding seat.

The specific embodiment

In luffing stride excavator shown in Figure 1; Through slew gear 7 driver's cabin 6 and last swing arm 5 are installed pivotally above the rotary table 8 of this excavator; Last swing arm 5 is done lifting action up and down by the swing arm Driven by Hydraulic Cylinder, and hinged in the upper end of last swing arm 5 have a dipper-arm 2, is hinged with the arm hydraulic cylinder 4 that struggles against between the upper end of this dipper-arm 2 and the last swing arm 5; Be hinged with scraper bowl 1 in the lower end of dipper-arm 2, between scraper bowl 1 and dipper-arm 2, be hinged with scraper bowl hydraulic cylinder 3.Slew gear 7 adopts pivoting support structure commonly used.

Respectively be supported with two groups downwards in the both sides of the rotary table 8 of excavator and prop up leg mechanism, be positioned at two groups of rotary table 8 homonymies and prop up leg mechanism and be positioned at same perpendicular, so this excavator has four groups and props up leg mechanism.Every group is propped up leg mechanism and includes two supporting leg forks 9 that laterally arrange; The upper end of supporting leg fork 9 be hinged in rotary table 8 below; The lower end of supporting leg fork 9 is hinged on the walking beam 15 of correspondence; Hinge landing leg hydraulic cylinder 10 between a supporting leg fork 9 and walking beam 15, this structure can also be between two supporting leg forks 9 and walking beam 15, to be hinged with landing leg hydraulic cylinder 10 respectively.The two supporting leg forks 9 and the rotary table 8 of leg mechanism constitute parallel-crank mechanisms with walking beam 15, and promptly two supporting leg fork 9 bars such as grade are long.Every group is propped up leg mechanism all to there being delegation to walk beam 15.

As shown in Figure 2; Sliding bearing has lifting wheel sliding bar 13 on walking beam 15; In the upper end of lifting wheel sliding bar 13 rotating luffing lifting wheel 11 is installed; Lifting wheel sliding bar 13 is socketed in the lifting wheel sliding seat 20 slidably, and lifting wheel sliding seat 20 is fixedly set in the upside of walking beam 15 vertically, between lifting wheel sliding bar 13 and walking beam 15, is hinged with lifting hydraulic cylinder 14.At walking beam 15 1 ends rotating crawler driving whell 16 is installed; The other end of walking beam 15 is with directive wheel sliding bar 18 slidably; Rotating directive wheel 17 is installed in the outer end of directive wheel sliding bar 18; Hinge has luffing hydraulic cylinder 19 between walking beam 15 and the directive wheel sliding bar 18, and crawler belt 12 is around on described luffing lifting wheel 11, crawler driving whell 16 and the directive wheel 17.Every group is propped up on the pairing walking beam 15 of leg mechanism carrier roller and thrust wheel all is housed.

As shown in Figure 3; Because it is long that crawler belt 12 has retainer plate, reduce the height of luffing lifting wheel 11 and lifting wheel sliding bar 13 thereof, and the directive wheel sliding bar 18 that stretches out simultaneously; Thereby make the ground contact length of crawler belt 12 and area become big, otherwise can reduce the ground contact length and the area of crawler belt 12.So both can be according to the operation ground condition of excavator; Regulate the grounding pressure of excavator; Make it to be adapted to the soft ground condition of various differences, can strengthen the span ability of excavator again through luffing, make excavator be uneven or the staggered ground of ditch on operation.

As shown in Figure 4, through the landing leg hydraulic cylinder 10 that shrinks each group leg mechanism can make excavator rotary table 8 and on excacation mechanism and the decline of driver's cabin position, make excavator be in low level work operations situation.As shown in Figure 5, the directive wheel sliding bar 18 that slip cap is connected in the walking beam 15 outwards stretches, and can make crawler bearing area become big, excavates function and on soft terrain, keeps less grounding pressure.Withdrawal directive wheel sliding bar 18 driving resistances that can reduce excavator help reducing the driving resistance of excavator, help energy efficient.

Because below the rotary table 8 four groups prop up leg mechanism can be by corresponding hydraulic cylinder drive, and every group propped up the corresponding crawler belt of leg mechanism and can regulate its ground contact length.In the actual job, can realize alternately climbing stride, have the operation function of bionical beetle formula, this function combines the luffing of crawler belt long again, makes excavator have extremely strong off-road operation function, and compliance is broader.

Claims

1. luffing stride excavator; Comprise rotary table (8), slew gear (7), go up swing arm (5) and driver's cabin (6); Upward swing arm (5) and driver's cabin (6) are supported on the rotary table (8) through slew gear (7) pivotally; It is characterized in that: respectively be supported with two groups in the both sides of said rotary table (8) and prop up leg mechanism, two groups of homonymy are propped up leg mechanism and are positioned at same perpendicular figure; Every group is propped up leg mechanism and includes two supporting leg forks (9) that laterally arrange; The upper end hinge of supporting leg fork (9) is below rotary table (8); On the then hinged walking beam in the lower end of supporting leg fork (9) (15), between a supporting leg fork (9) and walking beam (15), be hinged with landing leg hydraulic cylinder (10) at least in correspondence; On walking beam (15), go back sliding bearing lifting wheel sliding bar (13) is arranged; In the upper end of lifting wheel sliding bar (13) rotating luffing lifting wheel (11) is housed, between lifting wheel sliding bar (13) and walking beam (15), is hinged with lifting hydraulic cylinder (14); At walking beam (15) one ends rotating crawler driving whell (16) is housed; Other end slip cap at walking beam (15) is connected to directive wheel sliding bar (18); In the outer end of directive wheel sliding bar (18) directive wheel (17) is housed, is hinged with luffing hydraulic cylinder (19) between walking beam (15) and the directive wheel sliding bar (18); Crawler belt (12) is around on described luffing lifting wheel (11), crawler driving whell (16) and the directive wheel (17).

2. luffing stride excavator according to claim 1; It is characterized in that: swing arm on can in perpendicular, swinging (5) front end is hinged to have dipper-arm (2); The lower end of this dipper-arm (2) is hinged with scraper bowl (1); Hinged between scraper bowl (1) and dipper-arm (2) have a scraper bowl hydraulic cylinder (3), and hinged between the upper end of dipper-arm (2) and the last swing arm (5) have a bucket arm hydraulic cylinder (4).

3. luffing stride excavator according to claim 1 is characterized in that: described slew gear (7) adopts the pivoting support structure.

4. luffing stride excavator according to claim 1 is characterized in that: two supporting leg forks (9) of said leg mechanism, and rotary table (8) and walking beam (15) formation parallel-crank mechanism.

5. luffing stride excavator according to claim 1 is characterized in that: the upside at said walking beam (15) is provided with lifting wheel sliding seat (20) vertically, and lifting wheel sliding bar (13) is socketed in the lifting wheel sliding seat (20) slidably.

6. luffing stride excavator according to claim 1 is characterized in that: said every group is propped up the leg mechanism correspondence one walking beam (15) is arranged, on walking beam (15), carrier roller and thrust wheel be housed.