Chassis and working machine

Abstract

The application relates to the technical field of working machines, and provides a chassis and a working machine, wherein the chassis comprises a chassis frame, a telescopic mechanism arranged on the chassis frame and capable of telescoping along the width direction of the chassis frame, a first crawler beam and a second crawler beam located on the two sides of the chassis frame, at least one of the first crawler beam and the second crawler beam being connected with the telescopic mechanism, and a first dozing blade and a second dozing blade, at least one of which moves synchronously with the telescopic mechanism, and the second dozing blade is telescopically connected with the first dozing blade. The telescopic mechanism can drive the synchronous movement of the first crawler beam and the first dozing blade, or the telescopic mechanism can drive the synchronous movement of the second crawler beam and the second dozing blade, that is, the distance between the first crawler beam and the second crawler beam and the distance between the first dozing blade and the second dozing blade can be synchronously adjusted through the telescopic mechanism, and the adjustment mode is more rapid.

Description

Technical Field

[0001] This invention relates to the field of work machinery technology, and more particularly to a chassis and work machinery. Background Technology

[0002] With the diversified application and development of construction machinery, the structure of construction machinery is becoming more refined, user-friendly, and convenient for operation and maintenance.

[0003] For example, taking excavators as an example, current excavators typically have an extension plate on the bulldozer blade, which can be detachably attached to the blade. When the excavator is working in a wide area, the track beam needs to be extended and the extension plate manually installed on the bulldozer blade for digging work; while when the excavator is working in a narrow area, the width of the track beam needs to be shortened and the extension plate needs to be removed or folded at the same time to make the width of the bulldozer blade adaptable to the narrow working conditions.

[0004] However, in the existing technology, when an excavator passes through narrow or wide areas, the extension plate of the bulldozer blade needs to be manually removed or installed to adjust it to a suitable width, which is a rather cumbersome operation. Summary of the Invention

[0005] This invention provides a chassis and working machinery to solve the problem that in the prior art, excavators need to manually adjust the bulldozer blade to a suitable width in wide or narrow working conditions, which is a relatively cumbersome operation, and achieves synchronous extension and retraction of the bulldozer blade and track beam.

[0006] This invention provides a chassis, comprising:

[0007] Base frame;

[0008] A telescopic mechanism is provided on the base frame, and the telescopic mechanism is capable of telescopic extension and retraction along the width direction of the base frame;

[0009] The first track beam and the second track beam are located on both sides of the underframe, and at least one of the first track beam and the second track beam is connected to the telescopic mechanism.

[0010] The first bulldozer blade and the second bulldozer blade, at least one of which moves synchronously with the telescopic mechanism, and the second bulldozer blade is telescopically connected to the first bulldozer blade.

[0011] A chassis according to the present invention further includes:

[0012] The third bulldozer blade is connected to the base frame; and one end of the third bulldozer blade is retractably connected to the first bulldozer blade, and the other end is retractably connected to the second bulldozer blade.

[0013] According to a chassis provided by the present invention, the first bulldozer blade is connected to the first track beam, and the second bulldozer blade is connected to the second track beam.

[0014] According to a chassis provided by the present invention, the first bulldozer blade includes:

[0015] The bulldozing section extends along the width of the base frame;

[0016] The connecting part is vertically connected to the bulldozer part on the side near the underframe; and the connecting part is connected to the first track beam.

[0017] According to a chassis provided by the present invention, a groove is provided on the side of the bulldozing part near the base frame, and the third bulldozing blade is slidably disposed in the groove.

[0018] According to a chassis provided by the present invention, the first track beam comprises:

[0019] The beam body is connected to the telescopic mechanism;

[0020] Mounting plate, located on the side of the beam body near the base frame;

[0021] The mounting plate is connected to the connecting part.

[0022] According to a chassis provided by the present invention, at least one of the first bulldozer blade and the second bulldozer blade is connected to the telescopic mechanism.

[0023] According to a chassis provided by the present invention, the telescopic mechanisms are arranged in pairs, each pair of telescopic mechanisms includes a fixed end and a free end, each pair of fixed ends is connected to the underframe, and each pair of free ends is connected to the first track beam and the second track beam respectively.

[0024] According to a chassis provided by the present invention, the telescopic mechanism includes a hydraulic cylinder.

[0025] The present invention also provides a working machine, including a chassis as described in any of the preceding claims.

[0026] The chassis provided by this invention has a telescopic mechanism mounted on the base frame, which can extend and retract along the width of the base frame. A first track beam and a second track beam are located on opposite sides of the base frame, and at least one of the first and second track beams is connected to the telescopic mechanism. At least one of the first and second bulldozer blades moves synchronously with the telescopic mechanism, and the second and first bulldozer blades are telescopically connected. The telescopic mechanism's extension and retraction can drive the first track beam and the first bulldozer blade to move synchronously, or it can drive the second track beam and the second bulldozer blade to move synchronously. In other words, the distance between the first and second track beams, and the distance between the first and second bulldozer blades, can be adjusted synchronously through the telescopic mechanism, making the adjustment method faster.

[0027] In addition, the width of the bulldozer blade assembly can be adjusted by having at least one of the first and second bulldozer blades move synchronously with the telescopic mechanism.

[0028] Moreover, the telescopic mechanisms are arranged in pairs, each pair including a fixed end and a free end. The fixed ends are connected to the base frame, and the free ends are connected to the first track beam and the second track beam respectively, so that both the first track beam and the second track beam can move to better adapt to complex working conditions.

[0029] The working machinery provided by the present invention, having a chassis as described above, possesses the various advantages described above. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 This is a structural schematic diagram of the chassis in the open state in an embodiment of the present invention;

[0032] Figure 2 This is a structural schematic diagram of the chassis in its retracted state in an embodiment of the present invention;

[0033] Figure 3 This is a schematic diagram of the connection between the first track beam and the first bulldozer blade in an embodiment of the present invention;

[0034] Figure 4 This is a schematic diagram of the connection between the second track beam and the second bulldozer blade in an embodiment of the present invention;

[0035] Figure 5 This is a schematic diagram of the structure of the first bulldozer blade in an embodiment of the present invention;

[0036] Figure 6 This is a schematic diagram of the structure of the second bulldozer blade in an embodiment of the present invention;

[0037] Figure 7 This is a schematic diagram of the structure of the third bulldozer blade in an embodiment of the present invention;

[0038] Figure 8 This is a schematic diagram of the open state of the first bulldozer blade, the second bulldozer blade, and the third bulldozer blade in an embodiment of the present invention;

[0039] Figure 9 This is a schematic diagram of the retracted state of the first bulldozer blade, the second bulldozer blade, and the third bulldozer blade in an embodiment of the present invention;

[0040] Figure label:

[0041] 1. Underframe; 2. Telescopic mechanism; 3. First track beam; 4. Second track beam; 5. First bulldozer blade; 6. Second bulldozer blade; 7. Third bulldozer blade;

[0042] 21. Fixed end; 22. Free end; 201. Hydraulic cylinder;

[0043] 51. Bulldozing section; 52. Connecting section; 511. Slide groove;

[0044] 31. Beam body; 32. Mounting plate. Detailed Implementation

[0045] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0046] In the description of the embodiments of the present invention, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of the present invention. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0047] Currently, excavators typically have extension plates on their bulldozer blades, which are detachably mounted on the blade. When the excavator is working in open areas, the track beams need to be extended and the extension plate manually installed on the bulldozer blade for digging work; however, when the excavator is working in narrow areas, the width of the track beams needs to be shortened and the extension plate simultaneously removed or folded to adapt the width of the bulldozer blade to the narrow working conditions.

[0048] However, in the existing technology, when an excavator passes through narrow or wide areas, the extension plate of the bulldozer blade needs to be manually removed or installed to adjust it to a suitable width, which is a rather cumbersome operation.

[0049] This invention provides a chassis and working machinery to solve the problems existing in the prior art.

[0050] The following is combined with Figures 1 to 9 The chassis and working machinery of the present invention are described.

[0051] The first aspect of this invention is to provide a chassis to solve the problems existing in the prior art.

[0052] like Figure 1 and Figure 2 As shown, an embodiment of the present invention provides a chassis, including a base frame 1, a telescopic mechanism 2, a first track beam 3 and a second track beam 4, a first bulldozer blade 5 and a second bulldozer blade 6.

[0053] The underframe 1 is a crucial component of the excavator, typically referring to its bottom support structure. Composed of multiple rods and supports, it withstands the weight of the excavator and the impacts and vibrations during operation. The design and manufacturing quality of the underframe 1 significantly impacts the excavator's stability and service life. During excavator use, the underframe 1 must withstand various complex working conditions and environmental factors, such as soil, rocks, and water, thus requiring excellent durability and reliability. The telescopic mechanism 2 is mounted on the underframe 1 and can extend and retract along its width, making the excavator's operating range more flexible. It can be adjusted to meet different operational needs, thereby expanding the excavator's usability. For example... Figure 1 As shown, the width direction of the base frame 1 can be understood as the width direction of the working machinery, that is, the direction perpendicular to the forward and backward direction of the working machinery on the plane where the base frame 1 of the working machinery is located.

[0054] The first track beam 3 and the second track beam 4 are located on both sides of the underframe 1, supporting the weight of the excavator and mitigating impacts and vibrations during operation. Simultaneously, the first track beam 3 and the second track beam 4 also serve as the excavator's movement mechanism, enabling the excavator to move and operate on different terrains. At least one of the first track beam 3 and the second track beam 4 is connected to the telescopic mechanism 2; this allows for adjustment of the distance between the first track beam 3 and the second track beam 4, thereby expanding the operating range of the excavator and adapting to working surfaces of different sizes.

[0055] At least one of the first bulldozer blade 5 and the second bulldozer blade 6 moves synchronously with the telescopic mechanism 2, and the second bulldozer blade 6 is telescopically connected to the first bulldozer blade 5. The component consisting of the first bulldozer blade 5 and the second bulldozer blade 6 is called the bulldozer blade assembly. By telescopically connecting the second bulldozer blade 6 to the first bulldozer blade 5, the telescopic adjustment of the bulldozer blade assembly can be realized, thereby expanding the working range of the operating machinery and adapting to working surfaces of different sizes. For example, when it is necessary to excavate narrow gaps or small spaces, the second bulldozer blade 6 can be retracted through the telescopic mechanism 2 to adapt to smaller working surface sizes; when it is necessary to excavate large areas, the second bulldozer blade 6 can be extended to expand the working range.

[0056] For ease of description, the first track beam 3 and the second track beam 4 can be collectively referred to as the track beam assembly. The first bulldozer blade 5 and the second bulldozer blade 6 can be collectively referred to as the bulldozer blade assembly.

[0057] The chassis provided in this embodiment of the invention can drive the first track beam 3 and the first bulldozer blade 5 to move synchronously by extending and retracting the telescopic mechanism 2, or drive the second track beam 4 and the second bulldozer blade 6 to move synchronously by extending and retracting the telescopic mechanism 2. That is, the distance between the track beam assemblies and the distance between the bulldozer blade assemblies can be adjusted synchronously by the telescopic mechanism 2, and the adjustment method is faster.

[0058] In addition, by having at least one of the first bulldozer blade 5 and the second bulldozer blade 6 move synchronously with the telescopic mechanism 2, the width of the bulldozer blade assembly can be infinitely adjusted, which is better suited to various working conditions than the prior art which can only disassemble or install extension plates.

[0059] At least one of the first bulldozer blade 5 and the second bulldozer blade 6 moves synchronously with the telescopic mechanism 2. It can be understood that only the first bulldozer blade 5 moves synchronously with the telescopic mechanism 2, or only the second bulldozer blade 6 moves synchronously with the telescopic mechanism 2, or both the first bulldozer blade 5 and the second bulldozer blade 6 move synchronously with the telescopic mechanism 2.

[0060] At least one of the first track beam 3 and the second track beam 4 is connected to the telescopic mechanism 2. It can be understood that only the first track beam 3 is connected to the telescopic mechanism 2, or only the second track beam 4 is connected to the telescopic mechanism 2, or both the first track beam 3 and the second track beam 4 are connected to the telescopic mechanism 2.

[0061] like Figure 1 , Figure 7 , Figure 8 and Figure 9 As shown, in a feasible embodiment of the present invention, the bulldozer blade assembly further includes a third bulldozer blade 7, which is connected to the base frame 1. One end of the third bulldozer blade 7 is telescopically connected to the first bulldozer blade 5, and the other end is telescopically connected to the second bulldozer blade 6. When the first bulldozer blade 5 or the second bulldozer blade 6 extends or retracts, it drives the third bulldozer blade 7 to extend or retract, thereby changing the width of the bulldozer blade assembly to adapt to different working ranges. This configuration gives the bulldozer blade assembly greater flexibility and adaptability, enabling it to better handle different types and hardness of work objects and improve the efficiency and effectiveness of bulldozing operations. In practical applications, the first bulldozer blade 5, the second bulldozer blade 6, and the third bulldozer blade 7 can work together to achieve more efficient and wider bulldozing operations. This design makes the bulldozer blade assembly more efficient and reliable, and can meet the needs of different types and uses of bulldozing operations.

[0062] like Figure 3 and Figure 4 As shown, in a feasible embodiment of the present invention, the first bulldozer blade 5 is connected to the first track beam 3, and the second bulldozer blade 6 is connected to the second track beam 4. When the first track beam 3 is connected to the telescopic mechanism 2, the first bulldozer blade 5 moves with the first track beam 3; when the second track beam 4 is connected to the telescopic mechanism 2, the second bulldozer blade 6 moves with the second track beam 4. This design gives the bulldozer blade assembly better stability and load-bearing capacity, allowing it to better adapt to different types and hardnesses of soil, thus improving the efficiency and effectiveness of bulldozing operations. Simultaneously, the design of the first track beam 3 and the second track beam 4 also provides better support and flexibility, enabling the bulldozer blade assembly to better adapt to different terrains and operational needs.

[0063] like Figure 5 and Figure 6As shown, in a feasible embodiment of the present invention, the first bulldozer blade 5 includes a bulldozing part 51 and a connecting part 52. The bulldozing part 51 extends along the width direction of the base frame 1; this design makes the first bulldozer blade 5 more stable and flexible, while facilitating bulldozing operations. Specifically, the bulldozing part 51 extends along the width direction of the base frame 1, which can adapt to different sizes of working surfaces and engineering requirements. The connecting part 52 is vertically connected to the side of the bulldozing part 51 closest to the base frame 1; this also facilitates bulldozing operations. During bulldozing operations, the bulldozing part 51 can be closer to the base frame 1, making the bulldozing operation smoother, and also improving the operating accuracy and efficiency of the working machinery. The connecting part 52 is connected to the first track beam 3, so that the first bulldozer blade 5 and the first track beam 3 can move synchronously, making the first bulldozer blade 5 more stable, flexible, and convenient to use, and improving the operating accuracy and efficiency of the working machinery.

[0064] The connecting part 52 can also be configured as a telescopic structure, allowing the bulldozer blade assembly to extend or retract along the length of the base frame 1. At the same time, the connecting section between the third bulldozer blade 7 and the base frame 1 also needs to be configured as a telescopic joint structure so that the third bulldozer blade 7 can extend or retract synchronously with the first bulldozer blade 5 and the second bulldozer blade 6 to adapt to working conditions at different heights.

[0065] See you again Figure 5 and Figure 6 In one feasible embodiment of the present invention, a groove 511 is provided on the side of the bulldozer part 51 near the base frame 1, and the third bulldozer blade 7 is slidably disposed within the groove 511. This design allows the third bulldozer blade 7 to slide along the groove 511, facilitating bulldozing operations. The groove 511 is provided on the side of the bulldozer part 51 near the base frame 1, providing a sliding track for the third bulldozer blade 7. The third bulldozer blade 7 can slide along the groove 511, facilitating bulldozing operations. This design allows the working range of the machinery to be expanded and adapted to working surfaces of different sizes by sliding the first bulldozer blade 5 without changing the position of the third bulldozer blade 7.

[0066] Furthermore, by sliding the third bulldozer blade 7 within the groove 511, the stability and operational precision of the excavator can be improved to some extent. During bulldozing operations, the third bulldozer blade 7 can be closer to the underframe 1, making the bulldozing operation smoother and also improving the excavator's operational precision and efficiency.

[0067] Therefore, this design makes the third bulldozer blade 7 easier to use and improves the operating accuracy and efficiency of the excavator.

[0068] It should be noted that the second bulldozer blade 6 and the first bulldozer blade 5 have the same structure and are symmetrical.

[0069] like Figure 3 andFigure 4 As shown, in a feasible embodiment of the present invention, the first track beam 3 includes a beam body 31 and a mounting plate 32. The beam body 31 extends along the length of the underframe 1 and is connected to the telescopic mechanism 2. The mounting plate 32 is disposed on the side of the beam body 31 near the underframe. This design makes the first track beam 3 more stable and flexible, while facilitating the installation and disassembly of the first track beam 3. The mounting plate 32 is connected to the connecting part 52. By connecting the mounting plate 32 to the connecting part 52, the stability of the first track beam 3 and the first bulldozer blade 5 can be increased, making them more firmly connected to the underframe 1. When installing and disassembling the first track beam 3, the mounting plate 32 can serve as an operating platform, making the operation more convenient and safer. This design makes the first track beam 3 more stable, flexible, and convenient to install and disassemble. It also facilitates the replacement and maintenance of the first track beam 3 and the first bulldozer blade 5, improving the efficiency and lifespan of the operating machinery.

[0070] Furthermore, the second track beam 4 and the first track beam 3 have the same structure and are symmetrical.

[0071] In another feasible embodiment of the present invention, at least one of the first bulldozer blade 5 and the second bulldozer blade 6 is connected to the telescopic mechanism 2. It is understood that the first bulldozer blade 5 can also be directly connected to the telescopic mechanism 2, and the second bulldozer blade 6 can also be directly connected to the telescopic mechanism 2; that is, the first bulldozer blade 5 and the first track beam 3 are simultaneously connected to the telescopic mechanism 2, and when the telescopic mechanism 2 moves, the first track beam 3 and the first bulldozer blade 5 move simultaneously. Similarly, the second bulldozer blade 6 and the second track beam 4 are simultaneously connected to the telescopic mechanism 2, and when the telescopic mechanism 2 moves, the second track beam 4 and the second bulldozer blade 6 move simultaneously. This design allows the bulldozer blade assembly to extend and retract according to different operational needs, adapting to bulldozing operations of varying depths and widths. The telescopic mechanism 2 may include a hydraulic cylinder or other types of mechanical structures to realize the telescopic function of the bulldozer blade assembly. Through the telescopic function of the telescopic mechanism 2, the width of the bulldozer blade assembly can be better controlled, thereby improving the efficiency and effectiveness of bulldozing operations.

[0072] Please see again Figure 1 and Figure 2As shown, in a feasible embodiment of the present invention, the telescopic mechanisms 2 are arranged in pairs. Each pair of telescopic mechanisms 2 includes a fixed end 21 and a free end 22. The fixed ends 21 are connected to the base frame 1, and the free ends 22 are respectively connected to the first track beam 3 and the second track beam 4. The pair of telescopic mechanisms 2 can work simultaneously or independently. This design makes the connection between the base frame 1 and the first track beam 3, and between the base frame 1 and the second track beam 4, more stable and reliable, while realizing the telescopic adjustment of the first track beam 3 or the second track beam 4. The pair of telescopic mechanisms 2 are arranged in pairs, meaning they are used in cooperation with each other. The connection of the fixed ends 21 to the base frame 1 improves the connection stability between the base frame 1 and the telescopic mechanism 2. The connection of the free ends 22 to the first track beam 3 and the second track beam 4 enables the telescopic adjustment of the first track beam 3 and the second track beam 4, thereby expanding the working range of the machine and adapting to working surfaces of different sizes.

[0073] When the telescopic mechanism 2 has a pair, the free end 22 of the telescopic mechanism 2 is connected to the middle position of the first track beam 3 or the second track beam 4. In order to make the telescopic movement smoother, the telescopic mechanism 2 can also be configured in multiple pairs.

[0074] See you again Figure 1 and Figure 2 As shown, in a feasible embodiment of the present invention, the telescopic mechanism 2 includes a hydraulic cylinder 201. The hydraulic cylinder 201 is a common telescopic mechanism that utilizes the transmission and pressure of hydraulic oil to drive the piston, thereby achieving telescopic movement. This design has a large force and stroke range, adaptable to different sized working surfaces and engineering requirements. Simultaneously, the hydraulic cylinder also possesses high stability and reliability, ensuring the normal operation of the machinery in various environments.

[0075] In summary, the chassis of this embodiment of the invention can simultaneously adjust the width of the bulldozer blade assembly and the track beam assembly through the telescopic mechanism 2 without manual adjustment, and can also achieve stepless adjustment of the width of the bulldozer blade assembly.

[0076] The working machinery provided by the present invention is described below. The working machinery described below can be referred to in correspondence with the chassis described above.

[0077] A second aspect of the present invention provides a working machine, including a chassis as described in any of the preceding embodiments.

[0078] In embodiments of the present invention, the working machinery may be a mini excavator.

[0079] In an embodiment of the present invention, the working machinery may be a loader.

[0080] In an embodiment of the present invention, the working machinery may be a tractor.

[0081] The operating machinery of this invention includes the chassis as described in any of the above embodiments. Through the telescopic mechanism 2, the first track beam 3 and the first bulldozer blade 5 can be telescopically extended or retracted simultaneously, or the second track beam 4 and the second bulldozer blade 6 can be telescopically extended or retracted simultaneously. This enables synchronous control of the width of the bulldozer blade assembly and the track beam assembly, and allows for stepless adjustment of the width of the bulldozer blade assembly while maintaining consistency with the width of the track beam assembly.

[0082] In the description of the embodiments of the present invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of the present invention according to the specific circumstances.

[0083] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "method," "specific method," or "some methods," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or method is included in at least one embodiment or method of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or method. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or methods. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or methods described in this specification, as well as the features of different embodiments or methods.

[0084] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A chassis, characterized in that, include: Base frame; A telescopic mechanism is provided on the base frame, and the telescopic mechanism is capable of telescopic extension and retraction along the width direction of the base frame; The track beam assembly includes a first track beam and a second track beam, the first track beam and the second track beam are located on both sides of the underframe, and at least one of the first track beam and the second track beam is connected to the telescopic mechanism; The bulldozer blade assembly includes a first bulldozer blade and a second bulldozer blade, at least one of which moves synchronously with the telescopic mechanism, and the second bulldozer blade is telescopically connected to the first bulldozer blade; the distance between the track beam assemblies and the distance between the bulldozer blade assemblies are synchronously adjusted through the telescopic mechanism. The first bulldozer blade is connected to the first track beam, and the second bulldozer blade is connected to the second track beam; The first bulldozer blade includes: The bulldozing section extends along the width of the base frame; The connecting part is vertically connected to the bulldozer part on the side near the base frame; The first track beam includes: The beam body is connected to the telescopic mechanism; Mounting plate, located on the side of the beam body near the base frame; The mounting plate is connected to the connecting part.

2. The chassis according to claim 1, characterized in that, Also includes: The third bulldozer blade is connected to the base frame; Furthermore, one end of the third bulldozer blade is retractably connected to the first bulldozer blade, and the other end is retractably connected to the second bulldozer blade.

3. The chassis according to claim 2, characterized in that, The bulldozing section is provided with a chute on the side near the base frame, and the third bulldozing blade is slidably disposed in the chute.

4. The chassis according to claim 1, characterized in that, At least one of the first bulldozer blade and the second bulldozer blade is connected to the telescopic mechanism.

5. The chassis according to claim 1, characterized in that, The telescopic mechanisms are arranged in pairs, each pair of telescopic mechanisms including a fixed end and a free end. The fixed ends of the pair are connected to the base frame, and the free ends of the pair are respectively connected to the first track beam and the second track beam.

6. The chassis according to any one of claims 1-5, characterized in that, The telescopic mechanism includes a hydraulic cylinder.

7. A type of operating machinery, characterized in that, Includes the chassis as described in any one of claims 1 to 6.

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