Crawler chassis structure and chain cutter type continuous wall equipment comprising crawler chassis structure

Abstract

The utility model relates to the technical field of constructional engineering machinery, in particular to a crawler chassis structure and chain cutter type continuous wall equipment comprising the crawler chassis structure, the crawler chassis structure comprises a first crawler wheel, a second crawler wheel, a telescopic frame, a fixed frame and a telescopic device, the first crawler wheel and the second crawler wheel are arranged side by side, the telescopic device is connected between the telescopic frame and the fixing frame, the telescopic frame can penetrate through and be connected to the first crawler wheel, the fixing frame is connected with and penetrates through the second crawler wheel, the fixing frame is used for installation of an upper device and a counter weight, and the telescopic frame is used for installation of a working device. Compared with a traditional double-side telescopic structure, the single-side telescopic structure is adopted, the gravity center of the upper device is close to the rear portion in the working process, the weight of the balance weight is relatively light, and therefore the weight of the whole machine is reduced, the grounding specific pressure of equipment is reduced, and the equipment is more stable.

Description

Technical Field

[0001] The utility model relates to the technical field of construction engineering machinery, in particular to a crawler chassis structure and a chain knife type continuous wall device comprising the crawler chassis structure. Background Art

[0002] Chain cutter diaphragm wall equipment, also known as a "TRD method machine," is specialized equipment for TRD construction. Its operating principle involves vertically cutting into the ground using a spliced, multi-section cutting blade. After cutting to a specified depth, horizontal cutting is performed. Cutting fluid and cement slurry are injected sequentially during cutting. The rotating chain cutter mixes the cutting fluid, cement slurry, and in-situ soil, ultimately forming a continuous, uniformly thick underground anti-seepage water-stopping wall.

[0003] Chain-cutter continuous wall equipment primarily consists of a chassis, upper unit, counterweight, and working mechanism. The working mechanism includes a gantry, sliding frame, drive assembly, blade housing assembly, driven housing, and chain-cutter assembly. The blade housing assembly is constructed from multiple sections of cutting blade housings of varying specifications. The number and length of these sections are related to the depth of the wall to be constructed. The working mechanism is typically mounted on one side of the chassis and is used for the construction of underground waterproofing walls. The counterweight, mounted on the other side, balances the working mechanism, adjusts the center of gravity, and ensures stability during construction. Its weight is related to the weight of the working mechanism.

[0004] The chassis of chain knife type continuous wall equipment mainly include crawler chassis and walking chassis. Among them, the crawler chassis has the advantages of flexible transfer, convenient transportation, and fast walking speed, but its ground pressure ratio is relatively large and the structure is relatively complex. The walking chassis has the advantages of simple structure, small ground pressure ratio, and low cost, but it is inconvenient to transfer and transport, cannot walk continuously, and has a slow speed. At present, the crawler chassis is more widely used in the market. Considering the convenience and versatility during transportation and the stability during construction, the telescopic crawler chassis is generally used. The existing telescopic crawler chassis are all double-sided telescopic crawler chassis, that is, they are composed of a first crawler frame, a second crawler frame and an intermediate fixed frame. The upper device is installed on the intermediate fixed frame, the working device is installed on the first crawler frame (or the second crawler frame), and the counterweight is installed on the second crawler frame (or the first crawler frame). During operation, the first crawler frame and the second crawler frame move simultaneously relative to the intermediate fixed frame. At this time, since the upper device is located at the position of the intermediate fixed frame, in order to ensure the balance of the working device and the counterweight on both sides of the intermediate fixed frame and to ensure that the stability of the whole machine meets the use requirements, it is necessary to increase the counterweight according to the weight of the working device to ensure that the center of gravity of the whole machine is within the effective area formed by the two crawlers contacting the ground. This will increase the weight and ground pressure of the whole machine, thereby affecting the stability and passability of the whole machine. Utility Model Content

[0005] The purpose of the utility model is to provide a crawler chassis structure and a chain knife type continuous wall equipment including the crawler chassis structure, so as to solve the technical problems of the crawler chassis in the prior art such as the large overall weight and ground pressure. The specific technical solutions are as follows:

[0006] The utility model provides a crawler chassis structure, comprising a first track wheel, a second track wheel, a telescopic frame, a fixed frame and a telescopic device, wherein the first track wheel and the second track wheel are arranged side by side, the telescopic device is connected between the telescopic frame and the fixed frame, the telescopic frame can pass through and be connected to the first track wheel, the fixed frame is connected to and passes through the second track wheel, the fixed frame is used for installing an upper device and a counterweight, and the telescopic frame is used for installing a working device.

[0007] A further improvement of the crawler chassis structure of the present invention is that the first track wheel includes a driving wheel, a support frame, a guide wheel and a crawler track, the driving wheel and the guide wheel are respectively installed on the outer periphery of the support frame, and the crawler track is installed around the outer periphery of the driving wheel and the guide wheel.

[0008] A further improvement of the crawler chassis structure of the present invention is that the driving wheel is mounted on the rear end of the support frame.

[0009] A further improvement of the crawler chassis structure of the present invention is that the first crawler wheel further includes a supporting sprocket, which is mounted on the top of the support frame and supported by the crawler.

[0010] A further improvement of the crawler chassis structure of the present invention is that the first track wheel further includes a supporting roller, the supporting roller is installed at the bottom of the support frame, and the supporting roller is attached to the crawler.

[0011] A further improvement of the crawler chassis structure of the present invention is that there are multiple supporting wheels, and the multiple supporting wheels are arranged at intervals along the length direction of the support frame.

[0012] A further improvement of the crawler chassis structure of the present invention is that the driving wheel is mounted on the first end of the support frame, a tensioning device is provided on the second end of the support frame, and the guide wheel is mounted on an end of the tensioning device away from the support frame.

[0013] A further improvement of the crawler chassis structure of the present invention is that the tensioning device includes a telescopic shell, an adjusting screw and a nut, the first end of the telescopic shell is fixed to the support frame, the guide wheel is installed on the outer periphery of the second end of the telescopic shell, the adjusting screw and the nut are located inside the telescopic shell, the adjusting screw is threadedly connected to the support frame, the end of the adjusting screw away from the support frame is connected to the inner wall of the telescopic shell, and the nut is threaded on the adjusting screw to fix the threaded length of the adjusting screw relative to the support frame.

[0014] A further improvement of the crawler chassis structure of the present invention is that the tensioning device includes a telescopic shell, a tensioning cylinder and a buffer, the first end of the telescopic shell is fixed to the support frame, the guide wheel is installed on the outer periphery of the second end of the telescopic shell, the tensioning cylinder and the buffer are located inside the telescopic shell, the first end of the buffer is connected to the support frame, the second end of the buffer is connected to the tensioning cylinder, and the end of the tensioning cylinder away from the support frame is connected to the inner wall of the telescopic shell.

[0015] A further improvement of the crawler chassis structure of the present invention is that the telescopic frame includes a telescopic cross rod and a fixed rod, the telescopic cross rod is fixed between the fixed rod and the fixed frame, and the telescopic cross rod passes through the first track wheel, and the telescopic device is connected between the fixed rod and the fixed frame.

[0016] The present invention also provides a chain knife type continuous wall equipment containing the crawler chassis structure, which is characterized in that it includes the crawler chassis structure, upper device, counterweight and working device as described above, the upper device is installed on the top of the crawler chassis structure, the working device is installed on the front of the crawler chassis structure, and the counterweight is installed on the rear of the crawler chassis structure.

[0017] The application of the technical solution of the utility model has the following beneficial effects:

[0018] The crawler chassis structure of this utility model adopts a single-sided telescopic structure. Compared with the traditional double-sided telescopic structure, the center of gravity of the upper device is further back during operation, and the weight of the counterweight is relatively light, thereby reducing the overall weight of the machine and lowering the ground pressure of the equipment, making the equipment more stable. This solves the technical problems of large overall weight and high ground pressure of crawler chassis in the prior art. Compared with the traditional crawler chassis structure, the structure of this utility model lacks the telescopic structure on one side, simplifying the crawler chassis structure and reducing equipment costs.

[0019] In addition to the above-described purposes, features and advantages, the present invention has other purposes, features and advantages. The present invention will be further described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings, which constitute part of this application, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0021] Figure 1 This is a side view of the chain knife type continuous wall equipment with the crawler chassis structure of the utility model;

[0022] Figure 2 It is a side view of the crawler chassis structure of the utility model;

[0023] Figure 3 This is a top view of the crawler chassis structure of the utility model;

[0024] Figure 4 This is a force diagram of the crawler chassis structure of the utility model;

[0025] Figure 5 It is a force diagram of a double-sided telescopic crawler chassis structure in the prior art.

[0026] Among them, 1. crawler chassis; 2. upper device; 21. cab; 22. cover; 23. frame; 3. counterweight; 4. working device; 41. gantry; 42. sliding frame; 43. drive assembly; 44. knife box assembly; 45. chain knife assembly; 46. driven box; 11. driving wheel; 12. support sprocket; 13. supporting roller; 14. tensioning device; 15. guide wheel; 16. crawler; 17. telescopic frame; 18. fixed frame; 19. telescopic device. DETAILED DESCRIPTION

[0027] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0028] See also Figures 1 to 5 As shown, a crawler chassis structure, the utility model provides a crawler chassis structure, including a first track wheel, a second track wheel, a telescopic frame 17, a fixed frame 18 and a telescopic device 19, the first track wheel and the second track wheel are arranged side by side, the telescopic device 19 is connected between the telescopic frame 17 and the fixed frame 18, the telescopic frame 17 can pass through and be connected to the first track wheel, the fixed frame 18 is connected to and passes through the second track wheel, the fixed frame 18 is used for installing the upper device 2 and the counterweight 3, and the telescopic frame 17 is used for installing the working device 4.

[0029] Specifically, such as Figure 1 and Figure 3As shown, A represents forward, B represents backward, C represents left, and D represents right. The utility model is mainly used on chain knife type continuous wall equipment. It is a special equipment for TRD construction method, also known as "TRD construction method machine", and is mainly used for the construction of underground continuous walls. The upper device 2 mainly includes a cab 21, a cover 22, a frame 23, and a power system, a hydraulic system, a fluid system, an electrical system, etc. The working device 4 mainly includes a gantry 41, a sliding frame 42, a drive assembly 43, a knife box assembly 44, a chain knife assembly 45, a driven box 46, etc. The knife box assembly 44 is composed of multiple sections of cutting knife boxes of different specifications, and the number and length of the cutting knife boxes are related to the depth of the wall to be constructed. The specific structure and connection relationship of the upper device 2 and the working device 4 are all existing technologies and will not be repeated here. The working device 4 is installed in front of the telescopic frame 17 and is mainly used for the construction of underground anti-seepage water-stopping walls. Its weight is related to the depth of the wall being constructed. The greater the depth of the wall, the longer and more numerous the tool box assembly 44, and the greater the weight of the working device 4. The counterweight 3, consisting of several counterweights 3, is primarily used to balance the working device 4, adjust the center of gravity, and ensure stability during construction. Its weight is related to the weight of the working device 4. The counterweight 3 is mounted behind the fixed frame 18, and the upper device 2 is mounted above the fixed frame 18. The telescopic device 19 can be a hydraulic cylinder, a pneumatic cylinder, or other electrically operated telescopic structure.

[0030] Preferably, Figure 2 and Figure 3 As shown, the first track wheel includes a drive wheel 11, a support frame, a guide wheel 15, and a track 16. The drive wheel 11 and the guide wheel 15 are respectively mounted on the outer periphery of the support frame, and the track 16 is wound around the outer periphery of the drive wheel 11 and the guide wheel 15. The structure of the second track wheel is the same as that of the first track wheel. The drive wheel 11 is usually powered by an electric motor or a hydraulic motor to achieve clockwise or counterclockwise rotation, thereby driving the track 16 to rotate clockwise or counterclockwise. Specifically, the drive wheel 11 of the first track wheel is a first drive wheel 111, and the drive wheel 11 of the second track wheel is a second drive wheel 112. They can be independently controlled. When the first drive wheel 111 and the second drive wheel 112 move in the same direction and at the same speed, the track chassis 1 achieves linear motion. When the first drive wheel 111 and the second drive wheel 112 move in different directions or at different speeds, the track chassis 1 achieves steering motion. The guide wheel 15 is primarily used to guide the crawler track 16 in proper rotation, preventing it from running off track or going off track. The crawler track 16 is composed of several track shoes and a flexible link surrounding the drive wheel 11, guide wheel 15, carrier roller 12, and supporting roller 13. The flexible link on the first and second crawler wheels is the same length.

[0031] Preferably, the drive wheel 11 is installed at the rear end of the support frame (direction C in the figure). The advantage of this arrangement is that it can shorten the length of the driving section of the track 16, reduce the friction loss at the pin of the track 16 caused by the driving force, extend the service life of the track 16, and not easily cause the lower part of the track 16 to arch, avoiding the risk of the track 16 falling off when turning, which is beneficial to improving the efficiency of the walking system.

[0032] Preferably, the first track wheel further includes a carrier wheel 12, which is mounted on the top of the support frame and supported by the track 16. The main function of the carrier wheel 12 is to support the track 16 and prevent the track 16 from sagging too much, thereby reducing the vibration of the track 16 during movement and preventing the track 16 from sliding sideways.

[0033] Preferably, the first track wheel further includes a supporting wheel 13, which is mounted on the bottom of the support frame and is attached to the track 16. The main function of the supporting wheel 13 is to support the weight of the equipment and allow the track 16 to move along the wheel.

[0034] Preferably, there are multiple supporting rollers 13, which are spaced apart along the length of the support frame. The multiple supporting rollers 13 can disperse the weight of the entire device and prevent excessive wear of a single supporting roller 13.

[0035] Preferably, the driving wheel 11 is mounted on the first end of the support frame, a tensioning device 14 is provided on the second end of the support frame, and the guide wheel 15 is mounted on the end of the tensioning device 14 away from the support frame. The main function of the tensioning device 14 is to achieve the tensioning function of the crawler 16 to prevent the belt from falling off.

[0036] In the first embodiment, the tensioning device 14 includes a telescopic housing, an adjusting screw, and a nut. The first end of the telescopic housing is fixed to the support frame, and the guide wheel 15 is mounted on the outer periphery of the second end of the telescopic housing. The adjusting screw and the nut are located inside the telescopic housing. The adjusting screw is threadedly connected to the support frame. The end of the adjusting screw away from the support frame is connected to the inner wall of the telescopic housing. The nut is screwed onto the adjusting screw to fix the screwing length of the adjusting screw relative to the support frame. The telescopic housing can adopt a mother-and-child structure. The structure of the adjusting screw and the nut is a mechanical adjustment structure. Mechanical adjustment usually changes the position of the guide wheel 15 by adjusting the screw and the nut to achieve the purpose of tensioning. The structure is simple, but adjustment is laborious and the thread is prone to rust. Mechanical adjustment is a rigid tensioning without a buffering effect. The tensioning force is mainly adjusted by the screw.

[0037] In a second embodiment, the tensioning device 14 includes a telescopic housing, a tensioning cylinder, and a buffer. The first end of the telescopic housing is fixed to the support frame, and the guide wheel 15 is mounted on the outer periphery of the second end of the telescopic housing. The tensioning cylinder and the buffer are located inside the telescopic housing. The first end of the buffer is connected to the support frame, and the second end of the buffer is connected to the tensioning cylinder. The end of the tensioning cylinder away from the support frame is connected to the inner wall of the telescopic housing. In this embodiment, the buffer is a spring. The structure combining the tensioning cylinder and the buffer is a hydraulically adjustable structure. Hydraulic adjustment can be achieved by pressing grease into the tensioning cylinder through tools such as a grease gun or a lubrication pump. Hydraulic adjustment causes the guide wheel 15 to move forward and backward by extending and retracting the cylinder, thereby achieving tensioning or relaxation of the track 16. At the same time, the other end compresses the buffer spring, causing the buffer spring to obtain a certain pre-tensioning force, thereby reducing impact and playing a buffering role.

[0038] Preferably, the telescopic frame 17 includes a telescopic cross bar and a fixed bar. The telescopic cross bar is fixed between the fixed bar and the fixed frame 18. The telescopic cross bar passes through the first track wheel and is perpendicular to the first track wheel and the second track wheel. The telescopic device 19 is connected between the fixed bar and the fixed frame 18. In this embodiment, there are two telescopic cross bars, and the telescopic device 19 is located between the two telescopic cross bars. When the TRD construction machine is in the working state, the crawler chassis 1 is expanded under the action of the telescopic device 19. After being expanded into place, the telescopic frame 17 and the fixed frame 18 are fixed by a mechanical structure such as a pin. When the TRD construction machine is in the transport state, the crawler chassis 1 is retracted under the action of the telescopic device 19. After being retracted into place, the telescopic frame 17 and the fixed frame 18 are fixed by a mechanical structure such as a pin.

[0039] The present invention also provides a chain knife type continuous wall equipment containing the crawler chassis structure, which is characterized in that it includes the crawler chassis structure, the upper device 2, the counterweight 3 and the working device 4 as described above, the upper device 2 is installed on the top of the crawler chassis structure, the working device 4 is installed on the front of the crawler chassis structure, and the counterweight 3 is installed on the rear of the crawler chassis structure.

[0040] The utility model comprises two states: a working state and a transport state.

[0041] In the transport state, the crawler chassis 1 is retracted, meaning the telescopic device 19 is retracted. Neither the counterweight 3 nor the working device 4 is mounted on the crawler chassis 1. The chain knife diaphragm wall equipment primarily consists of the crawler chassis 1 and the upper device 2, with the center of gravity of the upper device 2 resting on the fixed frame 18.

[0042] In the working state, the crawler chassis 1 is in the deployed state, i.e., the telescopic device 19 is in the extended state and is positioned by a pin or other structure. At this time, the telescopic frame 17 moves forward of the fixed frame 18, i.e., the telescopic frame 17 moves away from the fixed frame 18, and the center of gravity of the upper device 2 still falls on the fixed frame 18.

[0043] The mast 41, sliding frame 42, drive assembly 43, and driven box 46 of the working device 4 are sequentially installed in front of the telescopic frame 17 of the crawler chassis 1. Based on the weight of the working device 4, the counterweight 3 is installed behind the fixed frame 18 of the crawler chassis 1. Based on the required wall depth, the multi-section cutting blade box and chain blade are sequentially spliced ​​to vertically cut into the ground. The counterweight 3 is increased based on the weight of the blade box assembly 44 and chain blade assembly 45 of the working device 4 to ensure stability during construction.

[0044] When the chain-cutter diaphragm wall equipment is in operation (i.e., when the crawler chassis 1 is extended), the center of gravity of the upper device 2 is closer to the counterweight 3. Compared with conventional double-sided telescopic crawler chassis 1, the weight of the counterweight 3 is reduced, thereby reducing the overall weight of the equipment, reducing the ground pressure of the equipment, and improving the equipment's stability. Furthermore, because the crawler chassis 1 has only one telescopic frame 17, its structure is simpler and easier to manufacture and assemble.

[0045] like Figure 4 and Figure 5 As shown in the figure, a comparative analysis is conducted using the force diagrams of a single-sided telescopic crawler chassis and a double-sided telescopic crawler chassis. Assume that the force balance point of the chain knife continuous wall equipment is point O. Based on the force balance, it is concluded that:

[0046] G3*L3=G1*L1+G2*L2;

[0047] G3*L3=G1*L1'+G2'*L2;

[0048] In the formula: G1 is the weight of the upper device 2; G2 is the weight of the counterweight 3 when the chassis is equipped with a single telescopic crawler track; G2' is the weight of the counterweight 3 when the chassis is equipped with double telescopic crawler tracks; G3 is the weight of the working device 4; L1 is the distance between the center of gravity of the upper device 2 and the point O when the chassis is equipped with a single telescopic crawler track; L1' is the distance between the center of gravity of the upper device 2 and the point O when the chassis is equipped with double telescopic crawler tracks; L2 is the distance between the center of gravity of the counterweight 3 and the point O; L3 is the distance between the center of gravity of the working device 4 and the point O.

[0049] From the above two formulas, we can get:

[0050] G2'=G2+(L1-L1')*G1 / L2;

[0051] Since L1>L1', G2'>G2. Therefore, it can be seen that the weight of the counterweight 3 when the chain knife type continuous wall equipment adopts a single-side telescopic crawler chassis 1 is smaller than the weight of the counterweight 3 when the conventional double-side telescopic crawler chassis 1 is used.

[0052] The crawler chassis structure of this utility model adopts a single-sided telescopic structure. Compared with the traditional double-sided telescopic structure, the center of gravity of the upper device 2 is further back during operation, and the weight of the counterweight 3 is relatively light. This reduces the weight of the entire machine, lowers the ground pressure of the equipment, and makes the equipment more stable. This solves the technical problems of the crawler chassis 1 being large in overall weight and ground pressure in the prior art. Compared with the traditional crawler chassis structure, the structure of this utility model lacks the telescopic structure on one side, simplifies the structure of the crawler chassis 1, and reduces the equipment cost.

[0053] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A crawler chassis structure, characterized in that: The invention comprises a first track wheel, a second track wheel, a telescopic frame (17), a fixed frame (18) and a telescopic device (19), wherein the first track wheel and the second track wheel are arranged side by side, the telescopic device (19) is connected between the telescopic frame (17) and the fixed frame (18), the telescopic frame (17) can pass through and be connected to the first track wheel, the fixed frame (18) is connected to and passes through the second track wheel, the fixed frame (18) is used for installing an upper device (2) and a counterweight (3), and the telescopic frame (17) is used for installing a working device (4).

2. The crawler chassis structure according to claim 1, characterized in that: The first crawler wheel comprises a driving wheel (11), a support frame, a guide wheel (15) and a crawler belt (16); the driving wheel (11) and the guide wheel (15) are respectively mounted on the outer periphery of the support frame; and the crawler belt (16) is mounted around the outer periphery of the driving wheel (11) and the guide wheel (15).

3. The crawler chassis structure according to claim 2, characterized in that: The first track wheel also includes a supporting sprocket (12), which is installed on the top of the support frame and supported by the track (16).

4. The crawler chassis structure according to claim 2, characterized in that: The first track wheel further includes a supporting roller (13), the supporting roller (13) is installed at the bottom of the support frame, and the supporting roller (13) is attached to the track (16).

5. The crawler chassis structure according to claim 4, characterized in that: There are multiple supporting rollers (13), and the multiple supporting rollers (13) are arranged at intervals along the length direction of the support frame.

6. The crawler chassis structure according to claim 2, characterized in that: The driving wheel (11) is mounted on the first end of the support frame, a tensioning device (14) is provided on the second end of the support frame, and the guide wheel (15) is mounted on the end of the tensioning device (14) away from the support frame.

7. The crawler chassis structure according to claim 6, characterized in that: The tensioning device (14) includes a telescopic shell, an adjusting screw and a nut, wherein the first end of the telescopic shell is fixed to the support frame, the guide wheel (15) is installed on the outer periphery of the second end of the telescopic shell, the adjusting screw and the nut are located inside the telescopic shell, the adjusting screw is threadedly connected to the support frame, the end of the adjusting screw away from the support frame is connected to the inner wall of the telescopic shell, and the nut is screwed on the adjusting screw to fix the screwing length of the adjusting screw relative to the support frame.

8. The crawler chassis structure according to claim 6, characterized in that: The tensioning device (14) includes a telescopic shell, a tensioning oil cylinder and a buffer. The first end of the telescopic shell is fixed to the support frame, the guide wheel (15) is installed on the outer periphery of the second end of the telescopic shell, the tensioning oil cylinder and the buffer are located inside the telescopic shell, the first end of the buffer is connected to the support frame, the second end of the buffer is connected to the tensioning oil cylinder, and the end of the tensioning oil cylinder away from the support frame is connected to the inner wall of the telescopic shell.

9. The crawler chassis structure according to claim 1, characterized in that: The telescopic frame (17) includes a telescopic cross bar and a fixed rod, the telescopic cross bar is fixed between the fixed rod and the fixed frame (18), and the telescopic cross bar is passed through the first track wheel, and the telescopic device (19) is connected between the fixed rod and the fixed frame (18).

10. A chain knife type continuous wall equipment containing the crawler chassis structure, characterized in that: The crawler chassis structure comprises the crawler chassis structure as claimed in claim 1, an upper device (2), a counterweight (3) and a working device (4), wherein the upper device (2) is installed on the top of the crawler chassis structure, the working device (4) is installed on the front of the crawler chassis structure, and the counterweight (3) is installed on the rear of the crawler chassis structure.

Images