CN201193332Y - Link mechanism of hoe excavator - Google Patents
Link mechanism of hoe excavator Download PDFInfo
- Publication number
- CN201193332Y CN201193332Y CNU2008201164136U CN200820116413U CN201193332Y CN 201193332 Y CN201193332 Y CN 201193332Y CN U2008201164136 U CNU2008201164136 U CN U2008201164136U CN 200820116413 U CN200820116413 U CN 200820116413U CN 201193332 Y CN201193332 Y CN 201193332Y
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- China
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- bucket
- connecting rod
- hinged
- scraper bowl
- linkage
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Abstract
The utility model discloses a linkage mechanism of the backhoe excavator, and comprises a rocker and a connecting rod component; one end of the rocker is hinged with a bucket rod, and the other end is connected with the connecting rod component; the other end of the connecting rod component is hinged with a bucket. The linkage mechanism is characterized in that the connecting rod component consists of a first connecting rod and a second connecting rod, which are mutually hinged; one end of the first connecting rod is hinged with the bucket rod cylinder, and the other end is hinged with the second connecting rod and the rocker; the other end of the second connecting rod is hinged with the bucket; and thus a three-point hinged structure is formed. When the travel of the bucket cylinder ends, the bucket teeth are arranged in the position of the maximum allowable corner. With the three-point hinged structure, the utility model expands the range of the corner of the bucket, the curve of the digging force matches the demand curve of the operation of the bucket, the excavation of the bucket is more smooth, the excavation speed is higher, and the utility mode is suitable for the occasion requiring a large corner of the bucket.
Description
Technical field
The utility model relates to a kind of linkage, is specifically related to a kind of being positioned on the backacter, is used to connect the linkage of bucket arm cylinder and scraper bowl.
Background technology
Excavator is a kind of earth and rock works machinery of extensive use, by operations such as moving of realizing cubic metre of earth of equipment, finishings.According to the apparatus for work difference of scraper bowl, can be divided into four kinds of crowd shovel, backhoe, grab jaw and pulling scrapers, first three plant use more.Wherein, the operation difference of crowd shovel and backhoe is: forward shovel is applicable to above earthwork of excavation shutdown face, and the class soil that the excavation water content is less and through the rock and the frozen soil of explosion generally is used for large-scale base pit engineering, also can be used for levelling of the land and constructs; Backacter is mainly used in the following earthwork of excavation shutdown face, is applicable to the sand or the clay of excavation one to three class.
Backhoe mechanism is the groundwork device of backacter, is made up of swing arm, dipper, scraper bowl and boom cylinder, bucket arm cylinder, bucket cylinder and linkage etc.It is hinged that its design feature is that the contact between the parts is all adopted, and realize exercises in the mining process by stretching of oil cylinder.The following hinge and the revolving dial of swing arm are hinged, and support and change the inclination angle of swing arm with boom cylinder, swing arm is rotated around hinge down reach lifting; Dipper is articulated in the upper end of swing arm, and the relative position of dipper and swing arm is controlled by bucket arm cylinder, when bucket arm cylinder is flexible, but dipper just on the moving arm hinge rotate; Scraper bowl and dipper front end are hinged, and rotate around the hinge that connects with dipper by the flexible scraper bowl that makes of bucket cylinder, in order to increase corner, connect with scraper bowl with linkage usually.
At present, the linkage that scraper bowl connects with dipper as shown in Figure 1, constitute by a rocking bar 3 and a rod hinge connection, one end and the dipper 2 of described rocking bar are hinged, the other end and rod hinge connection, the other end of described connecting rod 4 are articulated on the scraper bowl 5, when excavating with bucket cylinder 1 work, mining track then is that the hinge O with scraper bowl and dipper is the center, and this hinge to the distance of bucket tooth point is the camber line that radius is done; In like manner, the stroke of cornerite of camber line (rotational angle theta 1 of scraper bowl) and arc length decision bucket cylinder.Obviously, the excavation stroke when excavating with bucket cylinder work is shorter, as makes scraper bowl can fill soil when excavating the stroke end, needs bigger digging force to guarantee to excavate the soil property of big thickness.
Yet, scraper bowl digging force curve under the existing linkage is a class parabolic, maximum digging force appears at the nearly middle part of oil cylinder stroke, but concerning the scraper bowl operation, the initial stage that its maximum resistance that is subjected to point is beginning to excavate, in case material is dug, resistance will lower, be that the digging force that scraper bowl overcomes resistance can also lower, obvious and scraper bowl digging force curve is not inconsistent, but not the maximum resistance point of scraper bowl operation when digging force peaks, thereby the digging force deficiency can occur, for increasing the waste that digging force just can produce energy consumption.
Summary of the invention
The utility model purpose provides a kind of linkage of backacter, by the improvement of linkage, mining process is become more easily smoothly, and make full use of energy consumption, avoids waste.
For achieving the above object, the technical solution adopted in the utility model is: a kind of linkage of backacter, comprise rocking bar and link assembly, one end and the dipper of described rocking bar are hinged, the other end and described link assembly are hinged, and the other end of this link assembly and scraper bowl are hinged, described link assembly is hinged by first, second connecting rod and constitutes, one end and the bucket arm cylinder of described first connecting rod are hinged, the other end and second connecting rod and described rocking bar are hinged, the other end of described second connecting rod is articulated on the scraper bowl, constitutes three point articulated; When the bucket cylinder stroke was positioned at end, the scraper bowl bucket tooth was positioned at the maximum corner that allows.
In the technique scheme, excavator is when operation, rely on the hydraulic oil cylinder driving of equipment, by stretching of oil cylinder, for swing arm, dipper provide the kinetic energy that promotes and fall, bucket cylinder is then given the ability that scraper bowl excavates and loads, and described linkage is connected between bucket cylinder and the scraper bowl, make scraper bowl obtain bigger angle range, satisfy the needs of scraper bowl digging force; The maximum maximum angle that allows corner to be and to go to when scraper bowl is center of circle rotation with the pin joint with dipper of described scraper bowl, three point articulated structures of described first and second connecting rod and the hinged formation of rocking bar, make bucket rotation angle θ greater than existing bucket rotation angle, expand to the maximum corner that allows, show as on digging force (principle that can utilize merit to equate derive its design formulas) curve: the digging force of initiating terminal is just greatly greater than the initial value under the existing bar linkage structure, when maximum digging force appears at scraper bowl and begins to excavate, be complementary with scraper bowl operation rule; After maximum digging force occurs, scraper bowl is rotated further, enter and receive bucket after the stage, the digging force of tri-joint mechanism mechanism is less than the digging force under the existing linkage, but no longer be maximum excavating resistance this moment, therefore make full use of the tri-joint mechanism connecting rod and constitute the bigger characteristic of power of burying, mining process is become more easily smoothly; On the other hand, because the change of position of articulating point, the increase of corner make the rotational travel of scraper bowl increase, but the stroke of bucket cylinder does not have variation, thereby has shortened the excavation cycle of scraper bowl, has improved excavation speed.
Because the technique scheme utilization, the advantage that the utility model compared with prior art has is:
1, owing to link assembly in the utility model is made up of first, second rod hinge connection, the pin joint of rocking bar and connecting rod is positioned on first and second connecting rod hinge point, constitute three point articulated structures between bucket arm cylinder and scraper bowl, thereby under the situation that does not change the bucket cylinder stroke, the corner of scraper bowl is expanded to the maximum angle range that allows, be applicable to the occasion that needs big bucket rotation angle; The more important thing is, by the calculating to the scraper bowl digging force, the maximum digging force appearance point that draws scraper bowl shifts to an earlier date, and is in scraper bowl excavation phase (maximum stage of resistance), thereby be complementary with the demand of scraper bowl operation to digging force, mining process is become more easily smoothly;
2, owing to expanded angle range, the rotational travel of scraper bowl increases, and the stroke of oil cylinder does not increase, thereby the shortening of excavation cycle, makes excavation speed faster.
Description of drawings
Fig. 1 is the structural representation of existing shovel mechanism;
Fig. 2 is the structural representation of the utility model embodiment one;
Fig. 3 is a dipper scraper bowl skeleton drawing among Fig. 2;
Fig. 4 is the comparative graph of the utility model embodiment one and existing scraper bowl digging force;
Fig. 5 is the comparative graph of the utility model embodiment one and existing bucket rotation angle model figure.
Wherein: 1, bucket cylinder; 2, dipper; 3, rocking bar; 4, connecting rod; 5, scraper bowl; 11, bucket cylinder; 22, dipper; 33, rocking bar; 441, first connecting rod; 442, second connecting rod; 55, scraper bowl.
The specific embodiment
Below in conjunction with drawings and Examples the utility model is further described:
Embodiment one: extremely shown in Figure 5 referring to Fig. 2, a kind of linkage of backacter, comprise rocking bar 33 and link assembly, one end and the dipper 22 of described rocking bar are hinged, the other end and described link assembly are hinged, and the other end of this link assembly and scraper bowl 55 are hinged, described link assembly is hinged by first, second connecting rod and constitutes, one end and the bucket arm cylinder of described first connecting rod 441 are hinged, the other end and second connecting rod 442 and described rocking bar are hinged, the other end of described second connecting rod is articulated on the scraper bowl, constitutes three point articulated; When bucket cylinder 11 strokes were positioned at end, the scraper bowl bucket tooth was positioned at the maximum corner that allows.
The principle that the theoretical digging force of scraper bowl can utilize merit to equate its design formulas of deriving, referring to shown in Figure 3, the corner α of scraper bowl reduces Δ α when supposing the small Δ x length of the every elongation of oil cylinder one, then bucket cylinder work W1 of institute in this one stroke is W1=P * S * Δ x, wherein P is the operating pressure of bucket cylinder, and S is the internal diameter of bucket cylinder;
Fz is the cutting resistance that acts on the preceding cutting edge of scraper bowl, and its direction is for being that the center of circle, FE are the tangential direction of the circle of radius with F, and then the work Wz of resistance institute is Wz=Fz * FE * Δ α, and wherein Δ α unit is a radian, and FE is the radius of gyration R of scraper bowl;
Resistance is opposite with the theoretical digging force F size of scraper bowl, W1=Wz when ignoring frictional force, be P * S * Δ x=Fz * FE * Δ α=F * R * Δ α, so the calculating formula of theoretical digging force is F=P * S * Δ x/ (R * Δ α), P, S, R are all known in the formula, can make simultaneously that Δ x is a tiny length such as 10mm, utilize small routine can obtain corresponding Δ α value.
The SY60 excavator of producing with 31 Juki Corporation is an example, and the size relationship formula function of utilizing PRO/E is tried to achieve the Δ α value of each point, each stepping Δ x=10mm, draw digging force curve map as shown in Figure 4, this curve is for obtaining under all identical situation of oil cylinder and stroke thereof, rocking bar, scraper bowl, dipper, compare with existing linkage, the optimization point of tri-joint mechanism linkage is:
(1) during excavator operation, when scraper bowl opens, lands, when beginning to excavate, just is in starting point to this section of maximum digging force, this moment the excavating resistance maximum, in case material is dug, resistance will lower.From the digging force curve of Fig. 4 as can be known, the digging force of tri-joint mechanism linkage maximum this section from starting point to digging force is all greater than existing linkage, after maximum digging force occurs, scraper bowl is rotated further, be in and receive the bucket stage, the digging force of tri-joint mechanism linkage is littler than existing linkage within this section, but this moment, resistance reduced, and big excavating resistance can not appear, therefore the use of tri-joint mechanism linkage can't influence this important excavation performance parameter of maximum digging force of scraper bowl, as long as match the position that the maximum digging force of tri-joint mechanism linkage occurs, make full use of the tri-joint mechanism linkage and bury power, mining process is become more easily smoothly than big this characteristic;
(2) referring to shown in Figure 5, the difference DELTA y of the Y-axis of the origin of curve and terminal point is angle of rotation θ, as shown in Figure 1, 2, clearly θ 2〉θ 1 is that the tri-joint mechanism linkage has bigger angle of rotation than existing linkage, and the stroke of these two kinds of organization cylinders is identical among the figure, this explanation tri-joint mechanism linkage is finished a time of excavating the cycle will be shorter than existing linkage, and excavation speed is faster.Be applicable to the occasion that needs big bucket rotation angle.
Claims (1)
1. the linkage of a backacter, comprise rocking bar (33) and link assembly, one end of described rocking bar and dipper (22) are hinged, the other end and described link assembly are hinged, and the other end of this link assembly and scraper bowl (55) are hinged, it is characterized in that: described link assembly is hinged by first, second connecting rod and constitutes, one end and the bucket arm cylinder of described first connecting rod (441) are hinged, the other end and second connecting rod (442) and described rocking bar are hinged, the other end of described second connecting rod is articulated on the scraper bowl, constitutes three point articulated; When stroke was positioned at end, the scraper bowl bucket tooth was positioned at the maximum corner that allows at bucket cylinder (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201164136U CN201193332Y (en) | 2008-05-08 | 2008-05-08 | Link mechanism of hoe excavator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201164136U CN201193332Y (en) | 2008-05-08 | 2008-05-08 | Link mechanism of hoe excavator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201193332Y true CN201193332Y (en) | 2009-02-11 |
Family
ID=40392871
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201164136U Expired - Fee Related CN201193332Y (en) | 2008-05-08 | 2008-05-08 | Link mechanism of hoe excavator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201193332Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108915002A (en) * | 2018-07-12 | 2018-11-30 | 杨双来 | The dipper rocker arm body of excavator |
| WO2020011064A1 (en) * | 2018-07-12 | 2020-01-16 | 杨双来 | Bucket swing arm mechanism of excavator |
| CN114295273A (en) * | 2022-01-11 | 2022-04-08 | 柳州职业技术学院 | Accurate measuring method for work resistance work of loader |
-
2008
- 2008-05-08 CN CNU2008201164136U patent/CN201193332Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108915002A (en) * | 2018-07-12 | 2018-11-30 | 杨双来 | The dipper rocker arm body of excavator |
| WO2020011064A1 (en) * | 2018-07-12 | 2020-01-16 | 杨双来 | Bucket swing arm mechanism of excavator |
| WO2020011063A1 (en) * | 2018-07-12 | 2020-01-16 | 杨双来 | Rocker arm mechanism for bucket arm of digger |
| CN114295273A (en) * | 2022-01-11 | 2022-04-08 | 柳州职业技术学院 | Accurate measuring method for work resistance work of loader |
| CN114295273B (en) * | 2022-01-11 | 2022-06-17 | 柳州职业技术学院 | Accurate measuring method for work resistance work of loader |
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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: 20090211 Termination date: 20130508 |