Eccentric excavator counterweight structure

Abstract

The utility model relates to the technical field of excavator structures, in particular to an eccentric excavator balance weight structure which comprises a shell, a rear sealing plate is fixedly connected to the rear portion of the shell, a bottom plate is arranged at the bottom of the shell, a cavity with the adjustable size is inwards formed in the outer side of the rear sealing plate, the cavity is located on one side of the radial central axis of the rear sealing plate, and the bottom plate is connected with the bottom plate. A supporting base is fixedly connected to the middle of the bottom plate, and hoisting plates are fixedly mounted on the two sides of the upper end of the supporting base. The utility model not only solves the problem of stress concentration caused by the weight requirement of a specific machine type and the non-centered rotary main platform, prolongs the service life of the rotary platform, but also has the advantages of simple and reliable structure, low cost and high gravity center adjustment precision.

Description

Technical Field

[0001] The utility model relates to the technical field of excavator structures, and particularly relates to an eccentric counterweight structure for an excavator. Background Art

[0002] The counterweight is a component of a hydraulic excavator, and its function is to keep the excavator balanced during operation and reduce the sway of the excavator during operation. Generally, for a certain model of excavator, the position and external dimensions of the counterweight are fixed. Therefore, the weight of the counterweight becomes the most important characteristic index to be controlled during the production process of the counterweight. Most excavator counterweights are made by filling a filling material into a counterweight housing welded by metal plates. The filling material is poured into the box through the upper opening of the counterweight housing. By adjusting the mixing ratio of each filling material, the specific gravity of the filling mixture is changed, so that the weight of the counterweight meets the requirements.

[0003] In the prior art, an excavator counterweight structure with the application number 202323130885.0 includes a counterweight housing. A storage groove is opened inside the counterweight housing. A plurality of counterweight blocks are stacked and placed inside the storage groove. A positioning column is installed inside the storage groove. Positioning holes are opened at both ends of the counterweight block, and the positioning holes are slidably arranged with the positioning column. A sealing cover is hinged to the upper end of the storage groove through a hinge. Installation grooves are opened at both ends of the counterweight housing, and installation holes are arranged inside the installation grooves. By stacking and placing a plurality of counterweight blocks inside the storage groove of the counterweight housing, the weight of the counterweight structure can be adjusted by controlling the number of counterweight blocks loaded into the counterweight housing, so as to meet the use and processing of counterweights with different weights. Moreover, the counterweight blocks are divided into multiple small blocks, so that the disassembly and assembly of the counterweight blocks are convenient and fast, and it is also convenient for maintenance.

[0004] In the prior art, the weight of the counterweight structure is adjusted by controlling the number of counterweight blocks loaded into the counterweight housing. To a certain extent, the center of gravity of the counterweight blocks can be adjusted. However, the center of gravity of the counterweight blocks cannot be accurately positioned, and the overall weight of the counterweight blocks cannot be kept consistent. Summary of the Utility Model

[0005] In view of the above problems, the utility model provides an eccentric counterweight structure for an excavator, which not only solves the problems of the weight requirement of a specific model and the stress concentration caused by the non-central position of the slewing main platform, prolongs the service life of the slewing platform, but also has a simple and reliable structure, low cost, and high accuracy of center of gravity adjustment.

[0006] To achieve the above object, the technical solution of the present utility model is: an eccentric excavator counterweight structure, including a housing, a rear sealing plate is fixedly connected to the rear of the housing, a bottom plate is provided at the bottom of the housing, an adjustable-size cavity is provided inwardly on the outer side of the rear sealing plate, the cavity is located on one side of the radial central axis of the rear sealing plate, a support base is fixedly connected to the middle of the bottom plate, and lifting plates are fixedly installed on both sides of the upper end of the support base.

[0007] As a further solution of the present utility model: an upper cover plate is detachably connected to the top of the housing, a plurality of first openings are provided on the upper cover plate, and a top sealing plate is provided on the first openings.

[0008] As a further solution of the present utility model: the lifting plates are perpendicular to the rear sealing plate, the upper ends of the lifting plates extend out of the upper cover plate, through holes are provided at the parts where the upper ends of the lifting plates extend out of the upper cover plate, and a second opening is provided in the middle of the lifting plates.

[0009] As a further solution of the present utility model: a reinforcing rod is fixedly connected between the lifting plates.

[0010] As a further solution of the present utility model: the inside of the support base is a hollow structure, and a third opening is provided at the top of the support base.

[0011] As a further solution of the present utility model: the rear part of the support base is in contact connection with the rear sealing plate, a baffle is provided inside the support base, square openings are provided on both sides of the rear part and both sides of the bottom of the support base, square openings are also provided at the corresponding positions of the rear sealing plate and the bottom plate, and a notch is formed at the bottom of the support base.

[0012] As a further solution of the present utility model: exhaust holes are provided at the edges of the rear sealing plate and the bottom plate.

[0013] As a further solution of the present utility model: an anti-slip sticker is adhered to the bottom edge of the top sealing plate.

[0014] Compared with the prior art, the beneficial effects of the present utility model are:

[0015] 1. The present utility model adopts a single-sided cavity structure. By adjusting the cavity size and the density of the filling cans, the requirements for the center of gravity position and weight of the counterweight structure are achieved, solving the problems of the weight requirements of specific models and the stress concentration caused by the non-centralization of the slewing main platform, and prolonging the service life of the slewing platform. Especially for narrow-body models with large center-of-gravity deviations, the present utility model well solves the problem of center-of-gravity adjustment.

[0016] 2. The present utility model not only has a simple and reliable structure, low cost, but also has high center-of-gravity adjustment accuracy. Description of the Drawings

[0017] Figure 1 Schematic diagram of the rear structure of the present utility model;

[0018] Figure 2 Schematic diagram of the internal structure of the present utility model;

[0019] In the figure: 1, housing; 2, rear sealing plate; 3, bottom plate; 4, cavity; 5, support base; 6, lifting plate; 7, upper cover plate; 8, first opening; 9, top sealing plate; 10, through hole; 11, second opening; 12, strengthening rod; 13, third opening; 14, baffle; 15, square opening; 16, notch; 17, exhaust hole; 18, anti-slip sticker. Specific embodiments

[0020] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0021] Embodiment

[0022] Refer to Figures 1 to 2 , an eccentric excavator counterweight structure, including a housing 1, a rear sealing plate 2 is fixedly connected to the rear of the housing 1, a bottom plate 3 is provided at the bottom of the housing 1, an adjustable-size cavity 4 is provided inside the rear sealing plate 2, the cavity 4 is located on one side of the radial central axis of the rear sealing plate 2, a support base 5 is fixedly connected to the middle of the bottom plate 3, and lifting plates 6 are fixedly installed on both sides of the upper end of the support base 5.

[0023] The upper cover plate 7 is detachably connected to the top of the housing 1, and a plurality of first openings 8 are provided on the upper cover plate 7, and a top sealing plate 9 is provided on the first openings 8.

[0024] The lifting plate 6 is perpendicular to the rear sealing plate 2, the upper end of the lifting plate 6 extends out of the upper cover plate 7, a through hole 10 is provided at the part where the upper end of the lifting plate 6 extends out of the upper cover plate 7, and a second opening 11 is provided in the middle of the lifting plate 6.

[0025] In order to ensure the stability of the lifting plate, a strengthening rod 12 is fixedly connected between the lifting plates 6.

[0026] The support base 5 has a hollow structure inside, and a third opening 13 is provided at the top of the support base 5.

[0027] For better installation and fixation, the rear part of the support base 5 is in contact connection with the rear sealing plate 2. A baffle 14 is provided inside the support base 5. Square openings 15 are formed on both sides of the rear part and both sides of the bottom of the support base 5. Square openings 15 are also formed at the corresponding positions of the rear sealing plate 2 and the bottom plate 3. A notch 16 is formed at the bottom of the support base 5.

[0028] Exhaust holes 17 are formed at the edges of the rear sealing plate 2 and the bottom plate 3.

[0029] An anti-slip sticker 18 is adhered to the bottom edge of the top sealing plate 9.

[0030] Working principle: By adjusting the size of the cavity 4 and the density of the filling in the can, the requirements for the center of gravity position and weight of the counterweight structure are achieved. The center of gravity position is located at the center of the two lifting plates, improving the safety of the lifting counterweight and reducing the stress concentration on the non-centered rotary main platform, and prolonging the service life of the rotary platform.

[0031] The above is only the preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its inventive concept, makes equivalent substitutions or changes, and should be covered within the protection scope of the present invention.

Claims

1. An eccentric excavator counterweight structure, comprising a housing (1), a rear sealing plate (2) is fixedly connected to the rear of the housing (1), and a bottom plate (3) is provided at the bottom of the housing (1), characterized in that: On the outer side of the rear sealing plate (2), there is an adjustable-size cavity (4) arranged inwardly. The cavity (4) is located on one side of the radial central axis of the rear sealing plate (2). In the middle of the bottom plate (3), a support base (5) is fixedly connected. On both sides of the upper end of the support base (5), hoisting plates (6) are fixedly installed.

2. The eccentric excavator counterweight structure according to claim 1, wherein: At the top of the housing (1), an upper cover plate (7) is detachably connected. On the upper cover plate (7), there are a number of first openings (8), and on the first openings (8), there are top sealing plates (9).

3. The eccentric excavator counterweight structure according to claim 2, characterized in that: The hoisting plates (6) are perpendicular to the rear sealing plate (2). The upper ends of the hoisting plates (6) extend out of the upper cover plate (7). At the part where the upper ends of the hoisting plates (6) extend out of the upper cover plate (7), through holes (10) are opened. In the middle of the hoisting plates (6), there are second openings (11).

4. The eccentric excavator counterweight structure according to claim 3, characterized in that: A reinforcing rod (12) is fixedly connected between the hoisting plates (6).

5. The eccentric excavator counterweight structure according to claim 4, characterized in that: The inside of the support base (5) is a hollow structure, and at the top of the support base (5), there is a third opening (13).

6. The eccentric excavator counterweight structure according to claim 5, characterized in that: The rear part of the support base (5) is in contact connection with the rear sealing plate (2). Inside the support base (5), there is a baffle (14). Square openings (15) are opened on both sides of the rear part and both sides of the bottom of the support base (5). At the corresponding positions of the rear sealing plate (2) and the bottom plate (3), there are also square openings (15). A notch (16) is formed at the bottom of the support base (5).

7. The eccentric excavator counterweight structure according to claim 6, characterized in that: Exhaust holes (17) are opened at the edges of the rear sealing plate (2) and the bottom plate (3).

8. The eccentric excavator counterweight structure according to claim 7, wherein: An anti-slip sticker (18) is adhered to the bottom edge of the top sealing plate (9).

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