CN217419803U - Counterweight device and engineering machinery - Google Patents

Abstract

The utility model relates to an engineering machine tool discloses a counter weight device. The counterweight housing comprises a left frame piece, a middle piece and a right frame piece which are sequentially connected from left to right, wherein the left frame piece, the middle piece and the right frame piece surround to form a counterweight housing with a cavity structure, and the counterweight housing is internally provided with system parts required by engineering machinery. The utility model discloses existing counter weight effect has the carrier effect again, plays the guard action to the engineering machine tool components and parts of installation in the carrier simultaneously, and simple structure easily installs and dismantles in special operational environment. Furthermore, the utility model discloses still relate to an engineering machine tool.

Description

Counterweight device and engineering machinery

Technical Field

The utility model relates to an engineering machine tool specifically, relates to a counter weight device. Furthermore, the utility model discloses still relate to an engineering machine tool who contains this counter weight device.

Background

The rear end of the rotary table of the existing excavator is basically connected with the balancing weight, concrete is usually poured into the existing balancing weight, the whole stability of the engineering machinery is controlled by adjusting the specific gravity of the concrete, the balancing weight is generally heavier and is more suitable for the excavator with more than 15 tons or the engineering machinery with special requirements, and the balancing weight is inconvenient to carry, so that the maintenance of a power system and a hydraulic system of the engineering machinery is hindered, and the rotary table is not suitable for the excavator with less than 15 tons or the engineering machinery with special requirements. Meanwhile, the conventional excavator balancing weight is inconvenient to transport and assemble in a special working environment.

Therefore, a new counterweight device is needed to solve the above technical problems.

SUMMERY OF THE UTILITY MODEL

The technical problem to be solved by the utility model is to provide a counterweight device which has both counterweight and carrier functions, simultaneously protects the engineering machinery components installed in the carrier, has simple structure,

in order to realize the technical problem, the utility model provides an aspect provides a counterweight device, include left frame spare, middle part subassembly and the right frame spare that turn right from a left side and connect gradually, left side frame spare the middle part subassembly and right frame spare surrounds and forms the inside counterweight housing who has the cavity structures that can install the required system components of engineering machine tool.

Preferably, the rear end of the left frame member, the rear end of the middle member and the rear end of the right frame member are smoothly connected, the integral rear end is in a circular arc structure, and two sides of the circular arc structure form arc-shaped corners.

Specifically, the right and left frame members each include a side plate, a tailgate, and a frame member bottom plate, and the connection of the side plate and the frame member bottom plate and the connection of the tailgate and the frame member bottom plate form an inclined chamfer.

More specifically, the upper end of the right frame member is provided with a first mounting member and a second mounting member for mounting a guard door of the construction machine.

Further, the right frame member and the left frame member are both cast members.

Preferably, the middle part subassembly includes front end bent plate subassembly, bottom plate, rear panel, round steel structure and the back connecting plate that connects gradually backward in the past, the back shroud baffle is installed in the back connecting plate outside, the front end bent plate subassembly includes from a left side turn right first bent plate, second bent plate and the third bent plate that connects gradually, first bent plate the second bent plate and the third bent plate surround form be used for with engineering machine tool complex indent structure, the counter weight casing certainly the round steel structure to the direction slope of bottom plate, and be in the below formation maintenance space of rear panel.

Specifically, the second bent plate is the piece of buckling, the up end of second bent plate with first bent plate with the up end of third bent plate is the same, the both ends of second bent plate respectively with first bent plate with the third bent plate one-to-one is connected, just offer on the up end of second bent plate and be used for the installation engineering machine's mounting hole. Preferably, a working surface of the second bent plate facing the rear cover baffle is provided with a connecting hole.

Specifically, a maintenance hole is formed in the bottom plate.

Specifically, the cavity structure is respectively provided with a first installation space for installing a heat dissipation device, a second installation space for installing an engine and a third installation space for installing a hydraulic system from left to right.

More specifically, the first installation space is internally provided with a first connecting member mounted at an upper end of the first bent plate and a second connecting member mounted on an inner surface of the side plate of the left frame member.

More specifically, a first mounting plate, a second mounting plate, a third mounting plate, a fourth mounting plate and a reinforcing rib plate for mounting the engine are arranged in the second mounting space, two ends of the reinforcing rib plate are respectively connected with the inner surface of the second bent plate and the inner surface of the rear panel, the bottom of the reinforcing rib plate is connected with the bottom plate, the first mounting plate and the second mounting plate are mounted on the inner surface of the second bent plate, one end of the first mounting plate is connected with the reinforcing rib plate, the other end of the first mounting plate is provided with the first reinforcing plate, the first reinforcing plate is mounted on the inner surface of the second bent plate, the third mounting plate is mounted between the second reinforcing plate and the reinforcing rib plate, the third mounting plate and the second reinforcing plate are both connected with the inner surface of the rear panel, and the fourth mounting plate is mounted on the inner surface of the rear panel, and the upper end of the rear connecting plate is connected with the bottom surface of the rear connecting plate.

More specifically, the third bent plate and the right frame member enclose the third installation space.

The utility model discloses another aspect still discloses an engineering machine tool, including any one of the above-mentioned technical scheme counter weight device.

Through the technical scheme, the beneficial effects of the utility model are as follows:

adopt the utility model provides a counter weight device mainly is engineering machine tool counter weight, mainly includes the inside counter weight casing that is formed with cavity structures by left frame spare, middle part subassembly and right frame spare and constitutes, and cavity structures can be used for installing required system of engineering machine tool and spare part the utility model discloses not only can provide the counter weight effect for engineering machine tool and can also regard as the carrier to in addition to the engineering machine tool element of installing in the carrier inside plays the guard action, the utility model has the advantages of simple structure, frame rack structure's counter weight form is particularly suitable for transporting and assembling in special operational environment.

Other features and advantages of the present invention will be described in detail in the detailed description which follows.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention. In the drawings:

FIG. 1 is a perspective view of the overall construction of a particular embodiment of the counterweight device of the present invention;

FIG. 2 is another perspective view of the overall structure of an embodiment of the counterweight device of the present invention;

FIG. 3 is a front view of an embodiment of the counterweight device of the present invention;

FIG. 4 is a top view of an embodiment of the counterweight device of the present invention;

FIG. 5 is a cross-sectional view taken at A-A of FIG. 4;

FIG. 6 is a cross-sectional view taken at B-B of FIG. 4;

fig. 7 is a rear view of an embodiment of the counterweight device of the present invention;

fig. 8 is a right side view of a particular embodiment of the counterweight arrangement of the present invention;

fig. 9 is an assembly view of the counterweight device and the construction machine according to the present invention.

Description of the reference numerals

1 right frame member 2 left frame member

3 first bending plate 4 third bending plate

5 second bend 6 rear cover baffle

7 rear connecting plate 8 round steel structure

9 rear panel 10 bottom plate

11 first mounting plate 12 first reinforcing plate

13 second mounting plate 14 gusset plate

15 third mounting plate 16 second reinforcing plate

17 fourth mounting plate 18 fixing piece

19 first mount 20 second mount

21 first connection 22 second connection

23 engineering machinery 24 indent structure

27 side panel 28 tailgate

29 bottom plate 30 planar recessed structure of frame member

32 mounting hole 33 fixing plate

34 fixing hole 35 connecting hole

Detailed Description

The following detailed description of the embodiments of the present invention is provided in conjunction with the accompanying drawings, and it should be understood that the embodiments described herein are merely for purposes of illustration and explanation, and the scope of the present invention is not limited to the following embodiments.

In the description of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the terms "disposed," "provided," "mounted," and "connected" are to be interpreted broadly, and for example, the connection may be a direct connection, an indirect connection via an intermediate medium, a fixed connection, a detachable connection, or an integral connection; either directly or indirectly through intervening connectors, either internally or in any combination of the two or more elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

Furthermore, the terms "first", "second", "third" are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated, and therefore the features defined "first", "second", "third" may explicitly or implicitly include one or more of the features described.

In the present invention, in the case where no opposite explanation is made, the terms of orientation used such as "inside and outside" are defined with respect to the inside and outside of the corresponding component, and in addition, "front end and rear end" are defined with respect to the direction in which the weight device is used, and "left, right", "up and down" are defined with respect to the arrangement direction of the weight device provided by the present invention, specifically, in the drawings provided by the present invention, the orientation or positional relationship used is based on the orientation or positional relationship shown in the drawings, and what is contacted is only for convenience of description of the present invention and simplification of description, but not for indicating or suggesting that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation of the present invention; for the orientation terms of the present invention, it should be understood in conjunction with the actual installation state.

The utility model provides a counterweight device, see fig. 1 to fig. 2, mainly be frame-type counter weight, including right frame spare 1, middle part subassembly and left frame spare 2, right frame spare 1, middle part subassembly and left frame spare 2 turn left from the right side and connect gradually and form the counter weight casing, the inside of counter weight casing has the cavity structures that can install the required system of engineering machine tool 23 or part. The utility model has the advantages of simple structure, the frame-type counter weight that has right frame member 1, middle part subassembly and left frame member 2 to constitute, because its self weight please, so when meetting special operational environment, it is more convenient the utility model discloses by transportation and installation.

Referring to fig. 4, fig. 4 is the utility model discloses a plan view of a specific embodiment, can see from the picture, the utility model provides a rear end of counter weight casing is formed with circular arc structure to be formed with the arc turning in circular arc structure's both sides, the advantage of this design has lies in having strengthened the utility model discloses an aesthetic property to use the circular arc to replace the dog-ear, improved the utility model discloses a security has avoided technical personnel in the field to collide with the utility model discloses it is injured when on.

Further, as shown in fig. 1, the left frame member 2 and the right frame member 1 in the present invention are each constituted by a side plate 27, a back plate 28, and a frame member bottom plate 29, and as shown in fig. 2, inclined chamfers are formed at the joint of the side plate 27 and the frame member bottom plate 29 and the joint of the back plate 28 and the frame member bottom plate 29. So design can cooperate the utility model discloses the structure of the direction slope of counter weight casing rear end from 8 bottom of the case boards 10 of round steel construction, the appearance is pleasing to the eye to can increase the maintenance space.

Specifically, the utility model provides a left frame member 2 and right frame member 1 all can be integrated into one piece spare, form through the mould casting, and the structure of casting is more complete to the structure is firm, and the preparation is also convenient and fast, simultaneously, when meetting special operational environment, by the frame-type counter weight that right frame member 1, middle part subassembly and left frame member 2 are constituteed, light in weight can make things convenient for the transportation more and install at the scene.

As shown in fig. 1, the right frame member 1 of the present invention is provided at its upper end with a first mounting member 19 and a second mounting member 20, and specifically, the first mounting member 19 and the second mounting member 20 are located at the upper end of a side plate 27 of the right frame member 1, and are mainly used for mounting and fixing a guard door of a construction machine (23).

As a specific embodiment of the present invention, as shown in fig. 1, the middle component in the present invention includes a front end bent plate component, a bottom plate 10, a rear plate 9, a round steel structure 8 and a rear connecting plate 7 which are sequentially connected from front to rear, a rear cover baffle 6 is installed outside the rear connecting plate 7, and both ends of the rear cover baffle 6 are respectively connected to a left frame member 2 and a right frame member 1; referring to fig. 1, the front end bent plate subassembly includes from a left side to turn right first bent plate 3, second bent plate 5 and the third bent plate 4 that connects gradually, and first bent plate 3, second bent plate 5 and third bent plate 4 surround and form and be used for with engineering machine tool (23) complex indent structure (24), indent structure 24's opening orientation the utility model discloses a front end, and, the utility model provides a rear end of counter weight casing inclines from 8 bottom of the case boards 10's of round steel construction direction, just so can form the maintenance space in the below of rear panel 9. The existence of maintenance space has made things convenient for installation and the operation of technical staff in the field in the later maintenance process on the one hand, and on the other hand can also avoid the complete machine of engineering machinery to appear colliding with getting off at the in-process counter weight device of gyration. It can be understood that "front and back" in the above technical solutions means that when the counterweight device of the present invention is installed, the arrangement direction of the counterweight device is as shown by the coordinates in fig. 1.

As a specific embodiment of the present invention, the utility model provides an upper end edge at arc turning is provided with fixed plate 33, is provided with fixed orifices 34 on fixed plate 33, in addition, has still set up mounting 18 in the top of back shroud baffle 6, and fixed orifices 34 and mounting 18 mainly used install engineering machine's complete machine shell and the fixed of back shroud.

It should be noted that, referring to fig. 4, the term "upper end edge of the arc-shaped corner" in the above embodiment can be understood as the upper end edge of the junction of the side plate 27 and the back plate 28 in the left frame member 2 or the right frame member 1 of the present invention.

As shown in fig. 1 and 3, as a specific embodiment of the second bending plate 5 in the present invention, the second bending plate 5 is a bending member, and the upper end surface of the second bending plate 5 is flush with the upper end surfaces of the first bending plate 3 and the third bending plate 4, the two ends of the second bending plate 5 are respectively connected with the first bending plate 3 and the third bending plate 4 in a one-to-one correspondence manner, in addition, the mounting hole 32 for mounting the engineering machine is provided on the upper end surface of the second bending plate 5, and the working surface facing the back cover baffle 6 is provided with a connecting hole 35 for connecting with the engineering machine.

As a specific embodiment of the present invention, referring to fig. 1, the structure of the first bending plate 3 and the third bending plate 4 in the present invention is an "L" shaped structure, which can be an integrated piece or formed by welding two plates.

As a specific embodiment of the utility model, see fig. 1, the maintenance hole has been seted up on bottom plate 10, and the maintenance hole is used for later stage installation shrouding, and convenient the dismantlement, the existence of maintenance hole can be for the maintenance in later stage and the utility model discloses an installation facilitates.

The utility model discloses a there is cavity structures in counterweight housing's inside, cavity structures mainly used installation engineering machine tool required driving system, hydraulic system and heat abstractor etc. see fig. 1, as the utility model discloses a frame-type counterweight device, cavity structures are divided into the triplex, are the third installation space that is used for installing heat abstractor's first installation space, is used for installing the second installation space of engine and is used for installing hydraulic system respectively.

As a specific embodiment of the above technical solution, the following describes the first installation space, the second installation space, and the third installation space with reference to the accompanying drawings:

referring to fig. 1, the first installation space is internally provided with a first connecting member 21 and a second connecting member 22, the first connecting member 21 being installed at the upper end of the first bending plate 3, and the second connecting member 22 being installed on the inner surface of the left frame member 2. Specifically, the first connecting member 22 is mounted on the inner surface of the first bending plate 3 on the side close to the second bending plate 5, the second connecting member 22 is mounted on the side plate 27 of the left frame member 2, further, the first connecting member 21 and the second connecting member 22 are connecting members having a "U" shaped structure, through holes are opened in the first connecting member 21 and the second connecting member 22, and correspondingly, through holes are opened in the frame member bottom plate 29 of the left frame member 2, so that bolts can penetrate through the frame member bottom plate 29 and the connecting members from below and can be connected with the heat dissipating device.

As shown in fig. 1, the second installation space is mainly used for installing an engine, a first installation plate 11, a second installation plate 13, a third installation plate 15, a fourth installation plate 17 and a reinforcing rib plate 14 are arranged in the second installation space, two ends of the reinforcing rib plate 14 are respectively connected with the inner surface of the second bent plate 5 and the inner surface of the rear panel 9, and the bottom of the reinforcing rib plate 14 is connected with the bottom plate 10; a first mounting plate 11 and a second mounting plate 13 are mounted on the inner surface of the second bending plate 5, one end of the first mounting plate 11 is connected with a reinforcing rib plate 14, the other end of the first mounting plate is provided with a first reinforcing plate 12, and the first reinforcing plate 12 is mounted on the inner surface of the second bending plate 5; the third mounting plate 15 is mounted between the second reinforcing plate 16 and the reinforcing rib plate 14, and the third mounting plate 15 and the second reinforcing plate 16 are both connected with the inner surface of the rear panel 9; the fourth mounting plate 17 is mounted on the inner surface of the rear panel 9, and the upper end is connected to the bottom surface of the rear connecting plate 7. In addition, all be provided with the through-hole that is used for installing the engine on each mounting panel, each mounting panel also does the utility model discloses an overall framework structure has strengthened, makes the utility model discloses a framework structure is more firm, and structural strength has obtained the improvement.

The third installation space is mainly present in the cavity formed by the third bent plate 4 and the right frame member 1 for installing the heat sink.

By combining the above-mentioned embodiments and technical solutions, it can be understood that, in the counterweight device of the present invention, except that the right frame member 2 and the left frame member 1 are casting members, other installation components all use welded connections when installing, and the structure of the present invention can be transported and assembled in a special working environment.

In addition, the utility model also provides an engineering machine tool, including some above-mentioned specific implementation modes and technical scheme. The construction machine may be an excavator, a rescue machine, or the like.

The counterweight device of the present invention has been described above by way of specific embodiments, it is understood that the structural body and dimensions of the counterweight device of the present invention are not limited to the specific structural forms described in the above embodiments, and may be other structural forms, as long as the present invention is a counterweight housing formed by connecting and enclosing the right frame member 1, the middle member and the left frame member 2 in sequence from right to left, and the counterweight housing is of a frame structure, the inner part of the cavity body structure is provided with a working component which is used for installing the engineering machinery, the cavity body structure can meet the function of the counterweight of the utility model and can be used as a carrier to install the elements of the engineering machinery, and play the guard action to engineering machine tool component, and the utility model discloses dismantle simple to operate and light in weight, can transport in special operational environment and the purpose that has better installation reliability when assembling can.

Next, in order to better understand the technical solution and the using method of the present invention, the following preferred embodiments are described with reference to relatively comprehensive preferred technical features.

Referring to fig. 1 to 8, the present invention provides a counterweight device, as a counterweight device of a rescue machine, which mainly comprises a right frame member 1, a middle member and a left frame member 2 which are sequentially connected from right to left and can surround to form a counterweight housing, wherein the counterweight device is provided with a cavity structure capable of installing a power system, a hydraulic system and a heat sink, the rear ends of the right frame member 1, the middle member and the left frame member 2 can be smoothly connected and are arc-shaped, the rear end of the counterweight housing is formed with an arc structure, the two ends of the arc structure are formed with arc corners, the middle member comprises a front end bent plate assembly, a bottom plate 10, a rear panel 9, a round steel structure 8 and a rear connecting plate 7 which are sequentially connected from front to rear, a rear cover baffle 6 is arranged outside the rear connecting plate 7, the rear end of the counterweight housing inclines from the round steel structure 8 to the direction of the bottom plate 10, a maintenance space is formed below the back panel 9, the front end bent plate assembly comprises a first bent plate 3, a second bent plate 5 and a third bent plate 4 which are sequentially connected from left to right, the first bent plate 3, the second bent plate 5 and the third bent plate 4 surround to form a concave structure 24, the opening of the concave structure 24 faces the front end of the counterweight housing, the left frame member 2 and the right frame member 1 are both cast members, inclined chamfers are formed at the bent positions, a fixing plate 33 is arranged at the upper end of the arc corner, a fixing hole 34 is formed in the fixing plate 33, a fixing member 18 is arranged above the rear cover baffle 6, the fixing plate 22 and the fixing member 18 are used for installing an integral outer cover member of the rescue machine, a first installing member 19 and a second installing member 20 are arranged at the upper end of a side plate 27 of the right frame member 1 and used for installing and fixing a guard door of the rescue machine, the second bent plate 5 is a bent member, and the upper end face of the second bent plate 5 is flush with the upper end faces of the first bent plate 3 and the third bent plate 4, the second bending plate 5 is connected with the first bending plate 3 and the second bending plate 4 at both ends respectively, and is provided with a mounting hole 32 at the upper end of the second bending plate 5, and is provided with a connecting hole 35 on the working surface of the second bending plate 5 facing the back cover baffle 6, see fig. 9, the counterweight device and the middle frame of the rescue machine are connected by using an M16 bolt through the mounting hole 32 and the fixing hole 35, in order to install the power system, the hydraulic system and the heat sink, the utility model discloses a first mounting space, a second mounting space and a third mounting space are provided in the cavity structure, a first connecting piece 21 and a second connecting piece 22 with a U-shaped structure are provided inside the first mounting space, the first connecting piece 21 is installed at the upper end of the first bending plate 3, the second connecting piece 22 is installed on the inner surface of the left frame member 2, the first connecting piece 22 is installed on the inner surface of the side of the first bending plate 3 close to the second bending plate 5, the second connecting piece 22 is arranged on the side plate 27 of the left frame piece 2, through holes are formed in the first connecting piece 21 and the second connecting piece 22, correspondingly, through holes are also formed in the frame piece bottom plate 29 of the left frame piece 2, and bolts can conveniently penetrate through the frame piece bottom plate 29 and the connecting pieces from the lower part to be connected with a heat dissipation device of the rescue machine; a first mounting plate 11, a second mounting plate 13, a third mounting plate 15, a fourth mounting plate 17 and a reinforcing rib plate 14 are arranged in the second mounting space, two ends of the reinforcing rib plate 14 are respectively connected with the inner surface of the second bent plate 5 and the inner surface of the rear panel 9, and the bottom of the reinforcing rib plate 14 is connected with the bottom plate 10; the first mounting plate 11 and the second mounting plate 13 are mounted on the inner surface of the second bent plate 5, one end of the first mounting plate 11 is connected with the reinforcing rib plate 14, the other end of the first mounting plate is provided with the first reinforcing plate 12, and the first reinforcing plate 12 is mounted on the inner surface of the second bent plate 5; the third mounting plate 15 is mounted between the second reinforcing plate 16 and the reinforcing rib plate 14, and both the third mounting plate 15 and the second reinforcing plate 16 are connected with the inner surface of the rear panel 9; a fourth mounting plate 17 is mounted on the inner surface of the rear panel 9 and has an upper end connected to the bottom surface of the rear connecting plate 7, the power system is connected to the counter weight device through-holes provided in the respective connecting plates, and a third mounting space for mounting the hydraulic system is defined by the third bent plate 4 and the right frame member 1.

The utility model discloses a set the circular arc structure of slope to the rear end of counter weight casing and increase the maintenance space, avoided the rescue machine in gyration in-process with get off the car and appear colliding to because left frame spare 2 and right frame spare 1 are the whole casting, can conveniently be right under special operational environment the utility model discloses a spare part transports, then adopts welded gimmick to install, and it is convenient to install, can not only regard as the counter weight device of rescue machine still to install the component in the rescue machine as the carrier, protects the component simultaneously.

In the description of the present invention, reference to the description of the terms "one embodiment," "some embodiments," "a specific implementation," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In the present disclosure, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, however, the present invention is not limited to the details of the above embodiments, and the technical concept of the present invention can be within the scope of the present invention to perform various simple modifications to the technical solution of the present invention, and these simple modifications all belong to the protection scope of the present invention.

It should be noted that the various features described in the above embodiments may be combined in any suitable manner without departing from the scope of the invention. In order to avoid unnecessary repetition, the present invention does not separately describe various possible combinations.

In addition, various embodiments of the present invention can be arbitrarily combined with each other, and the disclosed content of the present invention should be considered as the same as long as it does not violate the idea of the present invention.

Claims (14)

1. The counterweight device is characterized by comprising a left frame piece (2), a middle piece and a right frame piece (1) which are sequentially connected from left to right, wherein the left frame piece (2), the middle piece and the right frame piece (1) surround to form a counterweight shell with a cavity structure in which system parts required by engineering machinery (23) can be installed.

2. The counterweight device according to claim 1, characterized in that the rear ends of the left frame member (2), the middle member and the right frame member (1) are smoothly connected and the overall rear end is in a circular arc structure, and both sides of the circular arc structure are formed into arc-shaped corners.

3. A counterweight device according to claim 2, characterized in that the right frame member (1) and the left frame member (2) each comprise a side plate (27), a tailgate (28) and a frame member bottom plate (29), and the connection of the side plate (27) and the frame member bottom plate (29) and the connection of the tailgate (28) and the frame member bottom plate (29) form an inclined chamfer.

4. A counterweight arrangement according to claim 3, characterized in that the upper end of the right frame member (1) is provided with a first mounting piece (19) and a second mounting piece (20) for mounting a guard door of the working machine (23).

5. A counterweight device according to any one of claims 1 to 4, characterized in that said right frame member (1) and said left frame member (2) are both cast members.

6. The counterweight device according to claim 3, characterized in that the middle component comprises a front end bent plate component, a bottom plate (10), a rear panel (9), a round steel structure (8) and a rear connecting plate (7) which are sequentially connected from front to back, a rear cover baffle (6) is installed on the outer side of the rear connecting plate (7), the front end bent plate component comprises a first bent plate (3), a second bent plate (5) and a third bent plate (4) which are sequentially connected from left to right, the first bent plate (3), the second bent plate (5) and the third bent plate (4) are encircled to form an inner concave structure (24) matched with the engineering machinery (23), and the counterweight shell is inclined from the round steel structure (8) to the direction of the bottom plate (10) and forms a maintenance space below the rear panel (9).

7. The counterweight device according to claim 6, wherein the second bending plate (5) is a bent piece, the upper end surface of the second bending plate (5) is flush with the upper end surfaces of the first bending plate (3) and the third bending plate (4), two ends of the second bending plate (5) are respectively connected with the first bending plate (3) and the third bending plate (4) in a one-to-one correspondence manner, and the upper end surface of the second bending plate (5) is provided with a mounting hole (32) for mounting the engineering machinery (23).

8. A counterweight device according to claim 6, characterized in that the working surface of the second bent plate (5) facing the tailgate (6) is provided with attachment holes (35).

9. Counterweight device according to claim 6, characterized in that said bottom plate (10) is provided with a service hole.

10. The counterweight device according to claim 6, wherein said cavity structure is provided from left to right as a first installation space for installing a heat sink, a second installation space for installing an engine, and a third installation space for installing a hydraulic system, respectively.

11. A counterweight device according to claim 10, characterized in that the first mounting space is internally provided with a first connecting member (21) mounted on the upper end of the first bent plate (3) and a second connecting member (22) mounted on the inner surface of the side plate (27) of the left frame member (2).

12. The counterweight device according to claim 10, characterized in that a first mounting plate (11), a second mounting plate (13), a third mounting plate (15), a fourth mounting plate (17) and a reinforcing plate (14) for mounting the engine are arranged in the second mounting space, two ends of the reinforcing plate (14) are respectively connected with the inner surface of the second bent plate (5) and the inner surface of the rear panel (9), the bottom of the reinforcing plate (14) is connected with the bottom plate (10), the first mounting plate (11) and the second mounting plate (13) are mounted on the inner surface of the second bent plate (5), one end of the first mounting plate (11) is connected with the reinforcing plate (14), the other end of the first mounting plate is mounted with a first reinforcing plate (12), the first reinforcing plate (12) is mounted on the inner surface of the second bent plate (5), the third mounting plate (15) is mounted between the second reinforcing plate (16) and the reinforcing rib plate (14), the third mounting plate (15) and the second reinforcing plate (16) are connected with the inner surface of the rear panel (9), the fourth mounting plate (17) is mounted on the inner surface of the rear panel (9), and the upper end of the fourth mounting plate is connected with the bottom surface of the rear connecting plate (7).

13. A counterweight device according to claim 10, characterized in that said third bent plate (4) and said right frame member (1) enclose said third installation space.

14. A working machine, characterized by comprising a counterweight arrangement according to any one of claims 1-13.

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