CN210288545U - Excavator counter weight structure - Google Patents
Excavator counter weight structure Download PDFInfo
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- CN210288545U CN210288545U CN201920567988.8U CN201920567988U CN210288545U CN 210288545 U CN210288545 U CN 210288545U CN 201920567988 U CN201920567988 U CN 201920567988U CN 210288545 U CN210288545 U CN 210288545U
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- balancing weight
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Abstract
A counterweight structure of an excavator is characterized in that a counterweight is mounted at the rear part of the excavator and comprises a fixed counterweight block fixedly connected with the tail part of the excavator and a movable counterweight block connected behind the fixed counterweight block, and an interface between the movable counterweight block and the fixed counterweight block inclines towards the rear part of the excavator from bottom to top; the fixed balancing weight and the movable balancing weight are connected through a connecting rod, the fixed balancing weight and the movable balancing weight are hinged with the connecting rod respectively, and the connecting rod or the movable balancing weight can drive the movable balancing weight to move backwards relative to the fixed balancing weight under the action of external force. The counterweight structure of the excavator adopts the fixed counterweight blocks and the movable counterweight blocks which are distributed in an inclined way to form the counterweight, so that the gravity center of the counterweight moves backwards when the excavator tilts forwards, and the balancing function is enhanced; in addition, adopt the connecting rod to articulate with fixed balancing weight and removal balancing weight respectively for remove the balancing weight and can move backward relatively fixed balancing weight, further make the focus of counter weight move backward.
Description
Technical Field
The utility model relates to an excavator structure field, more specifically the utility model relates to an excavator counter weight structure that says so.
Background
The counterweight is a component of the hydraulic excavator, and has the functions of keeping the balance of the excavator during work and reducing the shaking of the excavator during work. Generally, for a certain type of excavator, the position and the external dimension of the counterweight are fixed, so the weight of the counterweight is the most important characteristic index needing to be controlled in the counterweight production process.
Most of the weights for excavators are manufactured by filling a filler into a weight case welded from a metal plate. The filling material is filled into the box body from the opening at the upper part of the counterweight shell. The specific weight of the filling mixture is changed by adjusting the mixing proportion of each filling material, so that the weight of the balance weight meets the requirement. The counterweight filling materials are as follows: steel grit, barite, cement, water, etc. But the specific gravity and the price of the filling materials are different, and the price and the specific gravity of the steel grit are high; the barite has low price and low specific gravity.
In addition, the excavator is easily inclined due to unevenness of a road surface or the like during operation, a balance point is changed in the case of inclination, and the weight of the counterweight may be insufficient. Particularly when excavating forward leaning, if the weight of the counterweight is too light, the excavator may tip forward.
SUMMERY OF THE UTILITY MODEL
Aiming at the defects of the prior art, the utility model provides an excavator counterweight structure, which adopts a fixed counterweight block and a movable counterweight block which are distributed in an inclined way to form a counterweight, so that the gravity center of the counterweight moves backwards when the excavator tilts forwards, and the balancing function is enhanced; in addition, the connecting rod is respectively hinged with the fixed balancing weight and the movable balancing weight, so that the movable balancing weight can move backwards relative to the fixed balancing weight, and the gravity center of the balancing weight further moves backwards; and the backward movement of the movable balancing weight is controlled by using an oil cylinder and a hydraulic valve and is associated with an inclination angle sensor arranged on the excavator, and the degree of backward movement of the gravity center of the balancing weight can be automatically adjusted according to the inclination degree of the excavator.
The utility model discloses a concrete technical scheme as follows: a counterweight structure of an excavator is characterized in that a counterweight is mounted at the rear part of the excavator, the counterweight comprises a fixed counterweight block fixedly connected with the tail part of the excavator and a movable counterweight block connected behind the fixed counterweight block, and the interface of the movable counterweight block and the fixed counterweight block inclines towards the rear part of the excavator from bottom to top; the fixed balancing weight and the movable balancing weight are connected through a connecting rod, the fixed balancing weight and the movable balancing weight are hinged to the connecting rod respectively, and the connecting rod or the movable balancing weight can drive the movable balancing weight to move backwards relative to the fixed balancing weight under the action of external force.
The movable balancing weight and the fixed balancing weight are independently arranged and can be respectively filled with different counterweight materials, a larger force arm can be obtained when the counterweight material filled in the movable balancing weight is higher than the counterweight material filled in the fixed balancing weight in density, and the inclination of the interface of the movable balancing weight and the fixed balancing weight from bottom to top to the rear of the excavator can enable the gravity center of the counterweight to move backwards when the excavator inclines forwards, so that the front-back balance of the excavator is enhanced; and the movable balancing weight moves backwards relative to the fixed balancing weight, so that the gravity center of the balancing weight can be further moved backwards, and the balance capability and the excavating capability of the excavator in a forward inclining state are improved.
As the utility model discloses a preferred, remove the balancing weight and install at least one.
As the utility model discloses a preferred, remove the balancing weight and install one, and the quality of unit volume is not less than the quality of fixed balancing weight unit volume.
Thus, the mass per unit volume of the movable weight is not less than the mass per unit volume of the fixed weight, and the center of gravity of the weight can be biased rearward.
As the utility model discloses a preferred, remove the balancing weight and install two at least, and the quality of unit volume is for being located not less than being located excavator the place ahead at excavator rear.
The more the number of the movable balancing weights is, the more uniform the weight distribution of the balancing weights can be, the cost of the balancing weights can be reduced, and the balancing effect of the balancing weights is improved.
As the utility model discloses a preferred, the connecting rod is equipped with two at least, and parallel arrangement, same remove the pin joint collineation on the balancing weight and the line of pin joint all with the line of pin joint is parallel on the fixed balancing weight.
Therefore, a parallelogram array is formed between the hinged points of the connecting rods, so that the movable balancing weight can move stably relative to the fixed balancing weight.
As the utility model discloses a preferably, at least one the rigid coupling has telescopic link installation connecting rod on the connecting rod, fixed balancing weight with telescoping device is installed to telescopic link installation connecting rod.
Therefore, the connecting rods are driven to rotate through the telescopic action of the telescopic device, so that the parallelogram formed by the connecting rods is deformed, and the movable balancing weight moves backwards relative to the fixed balancing weight.
As the utility model discloses a preferred, the telescoping device is the hydro-cylinder, flexible both ends articulate respectively in on the fixed balancing weight with on the telescopic link installation connecting rod, just the hydro-cylinder respectively the symmetry install in the both sides of counter weight.
Therefore, the telescopic device can ensure enough thrust by adopting the oil cylinder, is sensitive in reaction by matching with the hydraulic reversing valve, and can play a pressure maintaining role after being lifted by using the hydraulic control one-way valve; the oil cylinders are respectively symmetrically arranged on two sides of the balance weight, so that the movable balancing weight is symmetrically stressed and stably moves.
As the utility model discloses a preferred, at least one remove the balancing weight with install the telescoping device between the fixed balancing weight.
Therefore, one movable balancing weight is driven to move backwards through the telescopic action of the telescopic device, and each movable balancing weight can move backwards relative to the fixed balancing weight under the action of deformation of a parallelogram formed by the connecting rods.
As the utility model discloses a preferred, the telescoping device is the hydro-cylinder, flexible both ends articulate respectively in on the fixed balancing weight with on the removal balancing weight, just the hydro-cylinder respectively the symmetry install in the both sides of counter weight.
Therefore, the telescopic device can ensure enough thrust by adopting the oil cylinder, is sensitive in reaction by matching with the hydraulic reversing valve, and can play a pressure maintaining role after being lifted by using the hydraulic control one-way valve; the oil cylinders are respectively symmetrically arranged on two sides of the balance weight, so that the movable balancing weight is symmetrically stressed and stably moves.
As the utility model discloses a preferably, install inclination sensor on the excavator, the hydro-cylinder is the single-action piston cylinder, and the oil inlet is connected the hydrovalve fuel feeding by oil pipe, the hydrovalve includes the proportion overflow valve at least.
Therefore, the inclination angle sensor transmits an inclination angle signal to the controller under the condition that the excavator inclines, the controller transmits an analog quantity signal to the proportional overflow valve and controls the overflow pressure of the proportional overflow valve, and the overflow pressure is larger when the inclination angle is larger; because the included angle between the oil cylinder and the connecting rod is smaller and smaller in the extending process of the oil cylinder, the backward movement distance of the movable balancing weight needs to be larger, the oil cylinder needs to use larger pressure, and the pressure of the oil cylinder is determined by the proportional overflow valve, so that the larger the inclination angle of the excavator is, the larger the backward movement distance of the movable balancing weight is, and the better the balance capacity and the excavating capacity of the excavator are.
To sum up, the utility model discloses following beneficial effect has:
the counterweight structure of the excavator adopts the fixed counterweight blocks and the movable counterweight blocks which are distributed in an inclined way to form the counterweight, so that the gravity center of the counterweight moves backwards when the excavator tilts forwards, and the balancing function is enhanced; in addition, the connecting rod is respectively hinged with the fixed balancing weight and the movable balancing weight, so that the movable balancing weight can move backwards relative to the fixed balancing weight, and the gravity center of the balancing weight further moves backwards; and the backward movement of the movable balancing weight is controlled by using an oil cylinder and a hydraulic valve and is associated with an inclination angle sensor arranged on the excavator, and the degree of backward movement of the gravity center of the balancing weight can be automatically adjusted according to the inclination degree of the excavator.
Drawings
FIG. 1 is a schematic view of the counterweight structure of the excavator according to the present invention mounted on the excavator;
FIG. 2 is a front view of an excavator according to an embodiment of the present invention;
FIG. 3 is a front view of an excavator counterweight structure according to an embodiment of the present invention moving a counterweight block to a middle stroke;
FIG. 4 is a front view of an excavator according to an embodiment of the present invention, when moving the counterweight block to the bottom;
in the figure, 1-counterweight, 11-fixed counterweight block, 12-movable counterweight block, 13-connecting rod, 131-telescopic rod mounting connecting rod and 14-telescopic device.
Detailed Description
The present invention will be further explained by the following embodiments with reference to the attached drawings.
Referring to fig. 1, 2, 3 and 4, in the counterweight structure of the excavator, a counterweight 1 is installed at the rear part of the excavator, the counterweight 1 comprises a fixed counterweight 11 fixedly connected with the tail part of the excavator and a movable counterweight 12 connected behind the fixed counterweight 11, and the interface between the movable counterweight 12 and the fixed counterweight 11 is inclined from bottom to top to the rear part of the excavator; fixed balancing weight 11 and removal balancing weight 12 are connected through connecting rod 13 between, and fixed balancing weight 11 and removal balancing weight 12 are articulated respectively with connecting rod 13 between, and connecting rod 13 or removal balancing weight 12 can drive removal balancing weight 12 and relatively fixed balancing weight 11 rearward movement under the effect of external force.
The movable balancing weight 12 and the fixed balancing weight 11 are independently arranged and can be respectively filled with different counterweight materials, a larger force arm can be obtained when the counterweight material filled in the movable balancing weight 12 is higher than the counterweight material filled in the fixed balancing weight 11 in density, and the interface of the movable balancing weight 12 and the fixed balancing weight 11 is inclined from bottom to top towards the rear of the excavator, so that the gravity center of the counterweight 1 can move backwards when the excavator inclines forwards, and the front-back balance of the excavator is enhanced; and the movable counterweight block 12 moves backwards relative to the fixed counterweight block 11, so that the gravity center of the counterweight 1 can be further moved backwards, and the balance capability of the excavator in a forward tilting state and the excavating capability are improved.
As shown in fig. 2, 3 and 4, at least one movable weight 12 is installed.
As shown in fig. 2, 3 and 4, the movable weight 12 is mounted in one piece, and the mass per unit volume is not less than that of the fixed weight 11.
Thus, the mass per unit volume of the movable weight 12 is not smaller than the mass per unit volume of the fixed weight 11, and the center of gravity of the counterweight 1 can be shifted rearward.
As shown in fig. 2, 3 and 4, at least two movable counterweights 12 are installed, and the mass per unit volume is not less than that of the rear of the excavator than that of the front of the excavator.
The more the quantity of removal balancing weight 12, can be more even to the weight distribution of counter weight 1, can reduce counter weight 1 cost, promote the balanced effect of counter weight 1.
As shown in fig. 2, fig. 3 and fig. 4, at least two connecting rods 13 are provided and are arranged in parallel, and the connecting lines of the hinge points on the same movable counterweight block 12 are collinear and are parallel to the connecting line of the hinge points on the fixed counterweight block 11.
Therefore, a parallelogram array is formed between the hinged points of the connecting rods 13, so that the movable balancing weight 12 can move stably relative to the fixed balancing weight 11.
As shown in fig. 2, 3 and 4, at least one connecting rod 13 is fixedly connected with a telescopic rod mounting connecting rod 131, and the fixed counterweight 11 and the telescopic rod mounting connecting rod 131 are provided with a telescopic device 14.
Therefore, the connecting rod 13 is driven to rotate by the telescopic action of the telescopic device 14, so that the parallelogram formed by the connecting rod 13 is deformed, and the movable balancing weight 12 moves backwards relative to the fixed balancing weight 11.
As shown in fig. 2, 3 and 4, the telescopic device 14 is an oil cylinder, two telescopic ends of the oil cylinder are respectively hinged to the fixed counterweight block 11 and the telescopic rod mounting connecting rod 131, and the oil cylinder is respectively symmetrically mounted on two sides of the counterweight 1.
Therefore, the telescopic device 14 can ensure enough thrust by adopting the oil cylinder, is sensitive in reaction by matching with the hydraulic reversing valve, and can play a pressure maintaining role after being lifted by using the hydraulic control one-way valve; the oil cylinders are respectively symmetrically arranged on two sides of the balance weight 1, so that the movable balance weight block 12 can be stressed symmetrically and stably.
A telescopic device 14 is arranged between at least one movable balancing weight 12 and the fixed balancing weight 11.
Therefore, a movable balancing weight 12 is driven to move backwards through the telescopic action of the telescopic device 14, and each movable balancing weight 12 can move backwards relative to the fixed balancing weight 11 under the action of the deformation of the parallelogram formed by the connecting rods 13.
The telescopic device 14 is an oil cylinder, two telescopic ends are respectively hinged on the fixed balancing weight 11 and the movable balancing weight 12, and the oil cylinders are respectively symmetrically arranged on two sides of the counterweight 1.
Therefore, the telescopic device 14 can ensure enough thrust by adopting the oil cylinder, is sensitive in reaction by matching with the hydraulic reversing valve, and can play a pressure maintaining role after being lifted by using the hydraulic control one-way valve; the oil cylinders are respectively symmetrically arranged on two sides of the balance weight 1, so that the movable balance weight block 12 can be stressed symmetrically and stably.
The excavator is provided with an inclination angle sensor, the oil cylinder is a single-action piston cylinder, an oil inlet is connected with a hydraulic valve for supplying oil through an oil pipe, and the hydraulic valve at least comprises a proportional overflow valve.
Therefore, the inclination angle sensor transmits the inclination angle signal to the controller under the condition that the excavator inclines, the controller transmits the analog quantity signal to the proportional overflow valve, the overflow pressure of the proportional overflow valve is controlled, and the overflow pressure is increased when the inclination angle is larger; because the included angle between the oil cylinder and the connecting rod 13 is smaller and smaller in the extending process of the oil cylinder, the backward moving distance of the movable balancing weight 12 is larger, the oil cylinder needs to use larger pressure, and the pressure of the oil cylinder is determined by a proportional overflow valve, so that the larger the inclination angle of the excavator is, the larger the backward moving distance of the movable balancing weight 12 is, and the better the balance capacity and the excavating capacity of the excavator are.
The above-described embodiments are merely illustrative of the preferred embodiments of the present invention and are not intended to limit the spirit and scope of the present invention. Without departing from the design concept of the present invention, various modifications and improvements made by the technical solution of the present invention by those skilled in the art should fall into the protection scope of the present invention, and the technical contents claimed by the present invention have been fully recorded in the claims.
Claims (10)
1. The utility model provides an excavator counter weight structure installs counter weight (1), its characterized in that at the rear portion of excavator: the counterweight (1) comprises a fixed counterweight block (11) fixedly connected with the tail part of the excavator and a movable counterweight block (12) connected to the rear part of the fixed counterweight block (11), and the interface of the movable counterweight block (12) and the fixed counterweight block (11) is inclined from bottom to top to the rear part of the excavator; fixed balancing weight (11) with remove between balancing weight (12) and connect through connecting rod (13), fixed balancing weight (11) and remove balancing weight (12) with it is articulated respectively between connecting rod (13), connecting rod (13) or remove balancing weight (12) can drive under the effect of external force remove balancing weight (12) relatively fixed balancing weight (11) is the rearward movement.
2. The excavator counterweight structure of claim 1, wherein: at least one movable balancing weight (12) is installed.
3. The excavator counterweight structure of claim 2, wherein: the movable balancing weight (12) is provided with one block, and the mass of the unit volume is not less than that of the fixed balancing weight (11).
4. The excavator counterweight structure of claim 2, wherein: at least two movable balancing weights (12) are installed, and the mass of the unit volume is not less than that of the rear part of the excavator and is not less than that of the front part of the excavator.
5. The excavator counterweight structure of claim 1, wherein: the connecting rods (13) are arranged in parallel, and the same connecting rods are arranged in parallel, and the connecting lines of the hinge joints on the movable balancing weight blocks (12) are collinear and are parallel to the connecting lines of the hinge joints on the fixed balancing weight blocks (11).
6. The excavator counterweight structure of claim 5, wherein: at least one connecting rod (13) is fixedly connected with a telescopic rod installation connecting rod (131), and a telescopic device (14) is installed on the fixed balancing weight (11) and the telescopic rod installation connecting rod (131).
7. The excavator counterweight structure of claim 6, wherein: the telescopic device (14) is an oil cylinder, two telescopic ends of the telescopic device are respectively hinged to the fixed balancing weight (11) and the telescopic rod mounting connecting rod (131), and the oil cylinder is respectively symmetrically mounted on two sides of the balance weight (1).
8. The excavator counterweight structure of claim 5, wherein: and a telescopic device (14) is arranged between the at least one movable balancing weight (12) and the fixed balancing weight (11).
9. The excavator counterweight structure of claim 8, wherein: the telescopic device (14) is an oil cylinder, two telescopic ends are respectively hinged to the fixed balancing weight (11) and the movable balancing weight (12), and the oil cylinders are respectively symmetrically arranged on two sides of the balancing weight (1).
10. The excavator counterweight structure of claim 7 or 9, wherein: the excavator is provided with an inclination angle sensor, the oil cylinder is a single-action piston cylinder, an oil inlet is connected with a hydraulic valve for supplying oil through an oil pipe, and the hydraulic valve at least comprises a proportional overflow valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920567988.8U CN210288545U (en) | 2019-04-24 | 2019-04-24 | Excavator counter weight structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920567988.8U CN210288545U (en) | 2019-04-24 | 2019-04-24 | Excavator counter weight structure |
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| Publication Number | Publication Date |
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| CN210288545U true CN210288545U (en) | 2020-04-10 |
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| CN201920567988.8U Active CN210288545U (en) | 2019-04-24 | 2019-04-24 | Excavator counter weight structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109989445A (en) * | 2019-04-24 | 2019-07-09 | 浙江顺得机械有限公司 | A kind of counter weight of excavator structure |
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- 2019-04-24 CN CN201920567988.8U patent/CN210288545U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109989445A (en) * | 2019-04-24 | 2019-07-09 | 浙江顺得机械有限公司 | A kind of counter weight of excavator structure |
| CN109989445B (en) * | 2019-04-24 | 2023-10-10 | 浙江顺得机械有限公司 | Excavator counterweight structure |
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