Sectional type rubber track block structure, track system, chassis and engineering machinery

Abstract

The utility model discloses a sectional type rubber track block structure, a track system, a chassis and engineering machinery. The sectional type rubber track block structure comprises a three-section type rubber track block, a clamping plate and a first fastening component which are spliced together, the lengths of the three-section type rubber track blocks are changed by replacing the rubber track blocks with different lengths in the middle so as to adapt to steel track plates with different widths; the outer side end faces of the two rubber track blocks located on the two sides are each provided with a groove. Two clamping plates which are of a U-shaped structure are symmetrically inserted into the two grooves, and gaps are reserved between the clamping plates and the bottom faces of the rubber track blocks and used for tightly clamping the three-section type rubber track blocks to the steel track shoe; the first fastening component is used for fixing the clamping plate and the rubber track block together. The applicability of the rubber track block is improved, the utilization rate of the rubber track block is improved, and the acquisition cost is saved; on-site disassembly and assembly of the rubber track blocks are facilitated, and labor cost is saved.

Description

Technical Field

[0001] This utility model relates to a segmented rubber track block structure, belonging to the technical field of excavator track structure. Background Technology

[0002] Currently, hydraulic excavators mostly use steel tracks to cope with harsh road conditions, and their track plates are mostly rolled steel track plates with a "three-rib" design. However, when the road surface or work site cannot be damaged, rubber track blocks need to be installed on the steel track plates to protect the road surface and work area. However, the need to use rubber track blocks is not frequent, such as for exhibitions and some light municipal operations. This results in a low usage rate of rubber track blocks by customers. Furthermore, since rubber track blocks cannot be used on rough roads, the need to remove and install rubber track blocks is relatively frequent.

[0003] The cost of a set of rubber track blocks is approximately 20,000 yuan. If the versatility of rubber track blocks can be improved, the number of purchases by customers can be reduced, and the utilization rate of rubber track blocks can be increased. Optimizing the convenience of on-site installation of rubber track blocks can also save labor costs.

[0004] There are two main types of installation for existing excavator rubber track blocks: one is bolt-fixed rubber track blocks, which require corresponding mounting holes on the steel track plate, and the rubber track blocks are fixed to the mounting holes of the steel track plate with bolts; the other is clamp-fixed rubber track blocks, which consist of rubber track blocks, clamps, and bolts. The clamps are fixed to both sides of the rubber track blocks with bolts, and the rubber track blocks are clamped to the steel track plate by the clamps. This type is more common because it does not require specially made steel track plates with mounting holes, and has better applicability.

[0005] However, the two installation methods mentioned above also have the following drawbacks:

[0006] The first type, bolt-fixed rubber track blocks, requires specially made steel track plates with mounting holes, so its application is not widespread. The second type, clamp-fixed rubber track blocks, has a high cost because the clamps are not adjustable. When the thickness of the steel track plate changes, there is no universality. Or, when using track plates of different widths, a complete set of clamps or rubber track blocks must be purchased separately. Summary of the Invention

[0007] To address the shortcomings of existing technologies, this utility model provides a segmented rubber track block structure, which improves the applicability and utilization of rubber track blocks, saves on purchase costs, facilitates on-site assembly and disassembly of rubber track blocks, and saves labor costs.

[0008] This utility model is achieved according to the following technical solution:

[0009] In a first aspect, the present utility model provides a segmented rubber track block structure, comprising:

[0010] A three-segment rubber track block spliced together, and each segment of the rubber track block is composed of a metal core and a rubber layer wrapping the metal core; the length of the three-segment rubber track block is changed by replacing the rubber track block in the middle with different lengths to adapt to steel track plates with different widths; a groove is provided on the outer end surface of each of the two rubber track blocks on both sides;

[0011] Two "C"-shaped clamping plates are symmetrically inserted into the two grooves, and a gap is left between the clamping plates and the bottom surface of the rubber track block for tightly clamping the three-segment rubber track block on the steel track plate;

[0012] A first fastening component for fixing the clamping plate and the rubber track block together.

[0013] In some embodiments, each of the adjacent two rubber track blocks in the three-segment rubber track block is docked together by the cooperation of an insertion plate and a slot, and each adjacent two rubber track blocks are fixed together by a plurality of second fastening components.

[0014] In some embodiments, a slot I is provided on each of the two outer end surfaces of the middle rubber track block, and a slot II is provided on each of the inner end surfaces of the two rubber track blocks on both sides, and the slot I and the slot II are arranged oppositely; the metal core of the middle rubber track block extends out from the two slots I to form two insertion plates I, and the metal cores of the two rubber track blocks on both sides extend out from the slot II to form insertion plates II, and the insertion plate I and the oppositely arranged insertion plate II are arranged in a vertically crossed manner; when the two rubber track blocks on both sides are spliced with the middle rubber track block, the insertion plate I is inserted into the slot II, and the insertion plate II is inserted into the slot I, and the three-segment rubber track block is fixed together by the second fastening components.

[0015] In some embodiments, a counterbore I is provided at each of the two ends of the top surface of the rubber layer of the middle rubber track block and in the region directly above the insertion plate I, and a counterbore II is provided at the top surface of the rubber layer of each of the two rubber track blocks on both sides and in the region directly above the insertion plate II; two through holes coaxially arranged with the counterbore I and the counterbore II are provided on the insertion plate I, and two threaded holes coaxially arranged with the counterbore I and the counterbore II are provided on the insertion plate II; the second fastening component is a bolt, which is respectively used to pass through the counterbore I, the through hole and the threaded hole and the counterbore II, the through hole and the threaded hole.

[0016] In some embodiments, each of the two ends of the top surface of the rubber layer of the middle rubber track block and located directly above the insert plate I is provided with a countersunk hole I, and each of the two rubber track blocks on both sides is provided with a countersunk hole II on the top surface of the rubber layer and located directly above the insert plate II; the insert plate I is provided with two threaded holes arranged coaxially with the countersunk hole I and the countersunk hole II respectively, and the insert plate II is provided with two through holes arranged coaxially with the countersunk hole I and the countersunk hole II respectively; the second fastening component is a bolt, which is used to pass through the countersunk hole I, the through hole and the threaded hole, as well as the countersunk hole II, the through hole and the threaded hole respectively.

[0017] In some embodiments, a shim is provided in the groove to change the size of the gap to accommodate steel track plates of different thicknesses; when the shim is above the clamping plate, the gap can be increased, and the gap can be further increased by stacking multiple shims; when the shim is below the clamping plate, the gap can be decreased, and the gap can be further decreased by stacking multiple shims.

[0018] In some embodiments, each of the rubber layer top surfaces of the two rubber track blocks on both sides, and the area directly above the clamping plate, is provided with at least one countersunk hole III. The gasket and the clamping plate are provided with through holes arranged coaxially with the countersunk hole III. The metal core is provided with threaded holes arranged coaxially with the countersunk hole III. The first fastening component is a bolt, which passes through the countersunk hole III and the through hole and is then tightened in the threaded hole, thereby fixing the clamping plate, the gasket and the rubber track block together.

[0019] In some embodiments, the bottom center area of ​​the three-section rubber track block spliced ​​together is provided with a concave structure to avoid the bolts protruding in the middle of the steel track plate; the top surface of the three-section rubber track block spliced ​​together is provided with an anti-slip structure composed of multiple convex strips arranged at intervals and extending along their length direction and vulcanized with the rubber layer.

[0020] Secondly, this utility model provides a track system, including a steel track, on which multiple segmented rubber track block structures as described above are snapped.

[0021] Thirdly, this utility model provides a chassis, including a frame, on which the aforementioned track system is mounted.

[0022] Fourthly, this utility model provides an engineering machinery, including the aforementioned chassis.

[0023] Beneficial effects of the utility model:

[0024] This utility model provides a segmented rubber track block structure. On the one hand, by replacing the middle rubber track block with different lengths, the length of the three-segment rubber track block can be changed to adapt to steel track plates of different widths, thus enabling the rubber track blocks to be installed on steel track plates of different widths. On the other hand, by adopting a clamping plate and shim structure, the distance between the clamping plate and the rubber track block can be adjusted by adjusting the position of the shim, thus enabling the rubber track blocks to be installed on steel track plates of different thicknesses. Attached Figure Description

[0025] The accompanying drawings, as part of this utility model, are used to provide a further understanding of the present utility model. The illustrative embodiments and descriptions of the present utility model are used to explain the present utility model, but do not constitute an undue limitation of the present utility model. Obviously, the drawings described below are merely some embodiments; those skilled in the art can obtain other drawings based on these drawings without any creative effort.

[0026] In the attached diagram:

[0027] Figure 1 This is a schematic diagram of the connection of the segmented rubber track block structure of this utility model;

[0028] Figure 2 This is an exploded view of the segmented rubber track block structure of this utility model;

[0029] Figure 3 This is a schematic diagram of the side rubber track block structure of this utility model (a is a cross-sectional view of plane AA, b is a top view).

[0030] Figure 4 This is a schematic diagram of the rubber track block structure in the middle part of this utility model (a is a cross-sectional view, b is a top view).

[0031] Attached diagram labels: 1-Rubber track block, 11-Rubber layer, 12-Metal core, 13-Bolt, 14-Washer, 15-Clamping plate, 2-Rubber track block, 21-Rubber layer, 22-Metal core, 23-Bolt, 24-Insertion plate I, 25-Slot I, 26-Insertion plate II, 27-Slot II.

[0032] It should be noted that these accompanying drawings and textual descriptions are not intended to limit the scope of the present invention in any way, but rather to illustrate the concept of the present invention to those skilled in the art by referring to specific embodiments. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate this utility model, but are not intended to limit the scope of this utility model.

[0034] In the description of this utility model, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", and "outer" 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 this utility model 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 this utility model.

[0035] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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 this utility model based on the specific circumstances.

[0036] like Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, a segmented rubber track block structure includes three segments of rubber track blocks spliced ​​together, two clamping plates 15 with a "U" shape, and a first fastening component. Each segment of the rubber track block consists of metal cores 12 and 22 and rubber layers 11 and 21 that wrap the metal cores 12 and 22. The length of the three segments of the rubber track blocks can be changed by replacing the middle rubber track block 2 with different lengths to accommodate steel track plates of different widths. A groove is provided on the outer end face of each of the two rubber track blocks 1 located on both sides. The two clamping plates 15 with a "U" shape are symmetrically inserted into the two grooves, with a gap between the clamping plates 15 and the bottom surface of the rubber track block 1, for tightly clamping the three segments of the rubber track blocks onto the steel track plate. The first fastening component is used to fix the clamping plates 15 and the rubber track blocks 1 together.

[0037] The following provides a further explanation of the specific structure of the three-section rubber track blocks spliced ​​together.

[0038] like Figure 1 , Figure 2As shown, in the three-section rubber track block, each pair of adjacent rubber track blocks is connected together by insert plates and slots, and each pair of adjacent rubber track blocks is fixed together by multiple second fastening components.

[0039] Further options, such as Figure 3 , Figure 4 As shown, a slot I 25 is provided on each of the two outer end faces of the middle rubber track block 2, and a slot II 27 is provided on each of the inner end faces of the two rubber track blocks 1 on both sides. Slots I 25 and slots II 27 are arranged opposite to each other. The metal core 22 of the middle rubber track block 2 extends from the slots I 25 on both sides to form two insert plates I 24, and the metal cores 12 of the two rubber track blocks 1 on both sides extend from the slots II 27 to form insert plates II 26. The insert plates I 24 and the opposite insert plates II 26 are arranged vertically and horizontally. When the two rubber track blocks 1 on both sides are spliced ​​together with the middle rubber track block 2, the insert plates I 24 are inserted into the slots II 27, and the insert plates II 26 are inserted into the slots I 25. The three sections of rubber track blocks are fixed together by the second fastening component.

[0040] In Embodiment 1, when the insert plate I 24 is located above the insert plate II 26, each of the two ends of the top surface of the rubber layer 21 of the middle rubber track block 2, and the area directly above the insert plate I 24, is provided with a countersunk hole I, and each of the top surfaces of the rubber layer 11 of the two rubber track blocks 1 on both sides, and the area directly above the insert plate II 26, is provided with a countersunk hole II; the insert plate I 24 is provided with two through holes arranged coaxially with the countersunk hole I and the countersunk hole II, respectively, and the insert plate II 26 is provided with two threaded holes arranged coaxially with the countersunk hole I and the countersunk hole II, respectively; the second fastening component is a bolt 23, which is used to pass through the countersunk hole I, the through hole and the threaded hole, as well as the countersunk hole II, the through hole and the threaded hole.

[0041] In Embodiment 1, when the insert plate I 24 is located below the insert plate II 26, each of the two ends of the top surface of the rubber layer 21 of the middle rubber track block 2, and the area directly above the insert plate I 24, is provided with a countersunk hole I, and each of the top surfaces of the rubber layer 11 of the two side rubber track blocks 1, and the area directly above the insert plate II 26, is provided with a countersunk hole II; the insert plate I 24 is provided with two threaded holes arranged coaxially with the countersunk hole I and the countersunk hole II, respectively, and the insert plate II 26 is provided with two through holes arranged coaxially with the countersunk hole I and the countersunk hole II, respectively; the second fastening component is a bolt 23, which is used to pass through the countersunk hole I, the through hole and the threaded hole, as well as the countersunk hole II, the through hole and the threaded hole.

[0042] Further options, such as Figure 3As shown, a shim 14 is provided in the groove to change the size of the gap to accommodate steel track plates of different thicknesses. When the shim 14 is above the clamping plate 15, the gap can be increased, and the gap can be further increased by stacking multiple shims 14. When the shim 14 is below the clamping plate 15, the gap can be decreased, and the gap can be further decreased by stacking multiple shims 14.

[0043] It should be noted that the gasket 14 can be made of multiple pieces of the same thickness, or multiple pieces of different thicknesses, or a mixture of multiple pieces of the same thickness and multiple pieces of different thicknesses.

[0044] Further options, such as Figure 3 As shown, each of the two rubber track blocks 1 on both sides has at least one countersunk hole III on the top surface of the rubber layer 11 and in the area directly above the clamping plate 15. The gasket 14 and the clamping plate 15 are both provided with through holes arranged coaxially with the countersunk hole III. The metal core 12 is provided with threaded holes arranged coaxially with the countersunk hole III. The first fastening component is a bolt 13, which passes through the countersunk hole III and the through hole and is screwed into the threaded hole, thereby fixing the clamping plate 15, the gasket 14 and the rubber track block 1 together.

[0045] It should be noted that the attached diagram shows two countersunk holes III at each end, which are used to fix the clamping plate 15, the gasket 14, and the rubber track block 1 together with two bolts 13. Of course, in actual design, it is not limited to two countersunk holes III at one end as described above; three countersunk holes III can also be provided.

[0046] Further options, such as Figure 1 As shown, the bottom center of the three-section rubber track block is designed with a concave structure to avoid the bolts protruding in the middle of the steel track plate; the top surface of the three-section rubber track block is provided with an anti-slip structure consisting of multiple convex strips arranged side by side at intervals and extending along its length, which are vulcanized with the rubber layer.

[0047] It should be noted that the anti-slip structure is not limited to the multiple raised strips mentioned above. In actual design, it can also be set as raised dots or other structures.

[0048] The rubber track blocks adopt a segmented design, making their installation more convenient. The specific implementation process is as follows:

[0049] The first step is to adjust and tighten the clamping plates and shims on both sides to ensure that the gap between the clamping plates is appropriate. (Note: After the first adjustment is appropriate, there is no need to adjust the position of the clamping plates when installing on track plates of the same thickness. This step can be omitted. The position of the clamping plates and shims needs to be adjusted again only when installing for the first time or when the thickness of the track plates of the vehicle being installed changes.)

[0050] The second step is to attach the steel track plates to the left and right sides of the two rubber track blocks respectively. This involves inserting the side edges of the steel track plates into the gaps formed between the rubber track blocks and the plates, while simultaneously sliding the left and right rubber track blocks towards the middle rubber track block. This allows the left and right rubber track blocks to align with the middle rubber track block through insert plates and slots. At this point, the installation bolts can be used to complete the installation. Furthermore, by replacing the middle rubber track blocks with different lengths, the rubber track block extension function can be achieved, making it suitable for wider tracks. (For example, if a customer has a 600mm wide track vehicle and an 800mm wide track vehicle, the customer only needs to purchase a basic segmented rubber track block structure, which comes with multiple middle section rubber track blocks of different lengths, so that two or more different models of vehicles can be used alternately for emergency purposes.)

[0051] This technical solution allows customers to use the same type of rubber track blocks on different machine models, improving the utilization rate of rubber track blocks and saving customers' purchase costs.

[0052] In summary, this utility model provides a segmented rubber track block structure. On the one hand, by replacing the middle rubber track block with different lengths, the length of the three-segment rubber track block can be changed to adapt to steel track plates of different widths, thus enabling the rubber track blocks to be installed on steel track plates of different widths. On the other hand, by adopting a clamping plate and shim structure, the distance between the clamping plate and the rubber track block can be adjusted by adjusting the position of the shim, thus enabling the rubber track blocks to be installed on steel track plates of different thicknesses.

[0053] The application of the segmented rubber track block structure described above will be further explained below.

[0054] Application Implementation 1: The track system provided by this utility model is described below. The track system described below can be referred to in correspondence with the segmented rubber track block structure described above.

[0055] The present invention provides a track system comprising a steel track, wherein a plurality of segmented rubber track block structures as described in any of the above embodiments are snapped onto the steel track.

[0056] The beneficial effects achieved by the track system provided by this utility model are consistent with the beneficial effects achieved by the segmented rubber track block structure provided by this utility model, so they will not be repeated here.

[0057] Application Implementation 2: The chassis provided by this utility model is described below. The chassis described below and the track system described above can be referred to in correspondence.

[0058] The chassis provided by this utility model may include the track system as described in any of the above embodiments.

[0059] The beneficial effects achieved by the chassis provided by this utility model are consistent with the beneficial effects achieved by the track system provided by this utility model, so they will not be repeated here.

[0060] Application Implementation 3: The following describes the engineering machinery provided by this utility model. The engineering machinery described below can be referred to in correspondence with the chassis described above.

[0061] The engineering machinery provided by this utility model may include a chassis as described in any of the above embodiments.

[0062] The beneficial effects achieved by the engineering machinery provided by this utility model are consistent with the beneficial effects achieved by the chassis provided by this utility model, so they will not be repeated here.

[0063] It should be noted that the aforementioned construction machinery can be crawler cranes, crawler excavators, crawler pump trucks, or other crawler construction machinery.

[0064] Numerous specific details are set forth in the specification provided herein. However, it will be understood that embodiments of the present invention may be practiced without these specific details. In some instances, well-known methods, structures, and techniques have not been shown in detail so as not to obscure the understanding of this specification.

[0065] Furthermore, those skilled in the art will understand that although some embodiments described herein include certain features found in other embodiments but not others, combinations of features from different embodiments are also within the scope of protection of this invention and form different embodiments. For example, in the embodiments described above, those skilled in the art can use them in combination based on known technical solutions and the technical problems to be solved by this application.

[0066] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-described technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A segmented rubber track block structure, characterized in that, Comprising: Three-piece rubber crawler blocks spliced together, each rubber crawler block consisting of a metal core and a rubber layer wrapping the metal core; the length of the three-piece rubber crawler block is changed by replacing the middle rubber crawler block with different lengths to adapt to steel crawler plates of different widths; a groove is provided on the outer end face of each of the two rubber crawler blocks on both sides; Two "C"-shaped clamping plates symmetrically inserted into the two grooves, with a gap left between the clamping plates and the bottom surface of the rubber crawler block for tightly clamping the three-piece rubber crawler block onto the steel crawler plate; A first fastening component for fixing the clamping plate and the rubber crawler block together.

2. A segmented rubber crawler block structure according to claim 1, wherein: Each adjacent two rubber crawler blocks in the three-piece rubber crawler block are docked together by means of the cooperation of an insertion plate and a slot, and each adjacent two rubber crawler blocks are fixed together by a plurality of second fastening components.

3. A segmented rubber crawler block structure according to claim 2, wherein: A slot I is provided on each of the two outer end faces of the middle rubber crawler block, and a slot II is provided on each of the inner end faces of the two rubber crawler blocks on both sides, and the slot I and the slot II are arranged opposite to each other; The metal cores of the middle rubber crawler block extend out from the slots I on both sides to form two insertion plates I, and the metal cores of the two rubber crawler blocks on both sides extend out from the slot II to form insertion plates II, and the insertion plates I and the insertion plates II arranged opposite to each other are arranged crosswise up and down; After the two rubber crawler blocks on both sides are spliced with the middle rubber crawler block, the insertion plate I is inserted into the slot II, and the insertion plate II is inserted into the slot I, and the three-piece rubber crawler block is fixed together by the second fastening component.

4. A segmented rubber crawler block structure according to claim 3, wherein: A counter bore I is provided at each of the two ends of the top surface of the rubber layer of the middle rubber crawler block and in the area directly above the insertion plate I, and a counter bore II is provided on the top surface of the rubber layer of each of the two rubber crawler blocks on both sides and in the area directly above the insertion plate II; Two through holes coaxial with the counter bore I and the counter bore II are provided on the insertion plate I, and two threaded holes coaxial with the counter bore I and the counter bore II are provided on the insertion plate II; The second fastening component is a bolt, which is respectively used to pass through the counter bore I, the through hole and the threaded hole and the counter bore II, the through hole and the threaded hole.

5. A segmented rubber crawler block structure according to claim 3, wherein: A counter bore I is provided at each of the two ends of the top surface of the rubber layer of the middle rubber crawler block and in the area directly above the insertion plate I, and a counter bore II is provided on the top surface of the rubber layer of each of the two rubber crawler blocks on both sides and in the area directly above the insertion plate II; Two threaded holes coaxial with the counter bore I and the counter bore II are provided on the insertion plate I, and two through holes coaxial with the counter bore I and the counter bore II are provided on the insertion plate II; The second fastening component is a bolt, which is respectively used to pass through the counter bore I, the through hole and the threaded hole and the counter bore II, the through hole and the threaded hole.

6. The segmented rubber track block structure according to claim 1, characterized in that: A shim is provided in the groove to change the size of the gap to accommodate steel track plates of different thicknesses; When the gasket is located above the card plate, it can increase the gap, and the gap can be further increased by stacking multiple gaskets; When the gasket is located below the card plate, the gap can be reduced, and the gap can be further reduced by stacking multiple gaskets.

7. The segmented rubber track block structure according to claim 6, characterized in that: Each of the two rubber track blocks on both sides has at least one countersunk hole III on the top surface of the rubber layer and in the area directly above the card plate. Both the gasket and the card plate are provided with through holes arranged coaxially with the countersunk hole III, and the metal core is provided with threaded holes arranged coaxially with the countersunk hole III. The first fastening component is a bolt, which passes through the countersunk hole III and the through hole and is then tightened into the threaded hole, thereby fixing the clamping plate, the gasket and the rubber track block together.

8. The segmented rubber track block structure according to claim 1, characterized in that: The bottom center of the three-section rubber track block that is spliced ​​together is designed with a concave structure to avoid the bolts protruding in the middle of the steel track plate; The top surface of the three-section rubber track blocks spliced ​​together has an anti-slip structure composed of multiple spaced, parallel, and extended ridges that are vulcanized with the rubber layer.

9. A tracked system comprising steel tracks, characterized in that: The steel track is fitted with a plurality of segmented rubber track block structures as described in any one of claims 1 to 8.

10. A chassis, comprising a frame, characterized in that: The chassis is equipped with the track system as described in claim 9.

11. An engineering machinery, characterized in that: Includes the chassis as described in claim 10.

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