Crawler belt block, crawler belt assembly and crawler belt type cart

Abstract

The utility model relates to the technical field of track blocks, in particular to a track block, a track assembly and a track cart, the track block comprises a track block body and a connecting part, the bottom surface and the top surface of the track block body are respectively configured to be a track surface and an assembly surface, and two adjacent track blocks are rotatably connected through the connecting part on the assembly surface. The connecting part comprises a first shaft hole body and a second shaft hole body which can be matched with each other to form a hinged structure, the connecting part and the track block body are integrally formed, holes of the first shaft hole body and the second shaft hole body are sectional type shaft holes, each sectional type shaft hole comprises at least two sections of semi-enclosed hole walls, and the hole walls are arranged in the holes. And two adjacent sections of semi-enclosed hole walls form staggered vertical or opposite supporting surfaces. The track block can effectively improve the machining precision and the assembly precision, so that the stability of a track is improved, the service life of the track is prolonged, and interference during core pulling can be avoided; and high-precision equipment is prevented from being used for machining, so that the production cost can be effectively reduced.

Description

Technical Field

[0001] This utility model relates to the field of track block technology, and in particular to a track block, track assembly and tracked trolley. Background Technology

[0002] Articulated tracks have a wide range of applications in complex working conditions and harsh environments due to their excellent terrain adaptability, high reliability, efficient transmission performance and easy maintenance.

[0003] However, the hinge holes in existing articulated tracks are usually machined. For example, patent application CN117048729A discloses a track plate assembly, track device, chassis, and operating machinery. The track plate assembly includes a track plate body; track links, including a left track plate and a right track plate arranged opposite each other. The left and right track plates are integrally formed on the first plate surface of the track plate body. A pair of first track plate portions of the left and right track plates are respectively provided with pin holes on one side of the intersection. Adjacent track links are connected by pins passing through the pin holes. However, the pin holes are usually machined (e.g., milling, drilling), which is difficult to machine. To ensure the coaxiality of the pin holes, high-precision equipment is required, resulting in excessively high production costs. If ordinary equipment is used, coaxiality cannot be guaranteed, resulting in low machining accuracy. This leads to low assembly accuracy between the track pin and the hinge hole, which in turn causes the following problems:

[0004] 1. Unstable track operation

[0005] Uneven wear and abnormal wear: Low precision of the hinge hole will cause uneven force on the chain links, accelerate unilateral wear (such as pins, bushings, track links, etc.), and shorten the overall life of the track.

[0006] Derailment risk: Insufficient precision of the articulation holes may cause poor meshing between the track and the drive wheel and guide wheel, which in extreme cases may lead to track detachment.

[0007] 2. Increased equipment vibration and noise

[0008] Excessive clearance or misalignment between the articulation hole and the track pin can trigger impact loads, resulting in severe vibration and abnormal noise, affecting operational comfort, and even damaging other related components.

[0009] 3. Reduced transmission efficiency

[0010] Increased frictional resistance (such as jamming caused by misalignment of shaft holes) leads to power loss.

[0011] 4. Fatigue damage of structural components

[0012] Localized stress concentration (such as track link cracks or pin breakage) may trigger a chain reaction, ultimately leading to track chain breakage and threatening operational safety.

[0013] 5. Maintenance costs soared

[0014] Frequent replacement of damaged parts (such as bushings and pins) and increased maintenance time significantly increase maintenance costs in the long run.

[0015] Therefore, this invention proposes a track block with an integrally molded hinge hole, which achieves high machining precision and helps improve the assembly accuracy of the track pin and the hinge hole, thereby enhancing track stability and service life. However, some existing track blocks have protrusions on both sides, which can interfere with the transverse core-pulling hinge hole, thus limiting the production of the track block. Utility Model Content

[0016] This utility model solves the problems in related technologies and proposes a track block, track assembly and tracked trolley, which can effectively improve the processing accuracy and assembly accuracy, thereby improving the track stability and service life, and can avoid interference during core pulling; it avoids the use of high-precision equipment for machining, and can effectively reduce production costs.

[0017] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0018] A track block includes a track block body and a connecting portion. The bottom surface and top surface of the track block body are respectively configured as a track surface and a mounting surface. Two adjacent track blocks are rotatably connected through the connecting portion on the mounting surface. The connecting portion includes a first shaft hole body and a second shaft hole body that can cooperate with each other to form a hinge structure. The connecting portion and the track block body are integrally formed. The holes of the first shaft hole body and the second shaft hole body are segmented shaft holes. The segmented shaft hole includes at least two semi-enclosed hole walls. Two adjacent semi-enclosed hole walls form staggered vertical or opposite support surfaces.

[0019] According to one embodiment of the present invention, a limiting protrusion is provided on the assembly surface, the limiting protrusion is disposed on both sides of the connecting part, and the limiting protrusion is used to limit the range of motion of the track wheel.

[0020] According to one embodiment of the present invention, the track block body, the limiting protrusion, and the connecting part are integrally formed.

[0021] According to one embodiment of the present invention, the connecting portion of two adjacent track blocks is rotatable along the track pin, and the rotation axis of the two adjacent track blocks does not protrude beyond the edge of the track block body of one of the track blocks.

[0022] According to one embodiment of the present invention, the first shaft hole body includes three semi-enclosed hole walls. The opening directions of the semi-enclosed hole walls on both sides are the same and perpendicular to the assembly surface, while the opening direction of the semi-enclosed hole wall in the middle is parallel to the assembly surface.

[0023] According to one embodiment of the present invention, the second shaft hole body includes two independent segmented shaft holes, each of the two independent segmented shaft holes including two semi-enclosed hole walls, and the opening direction of the two semi-enclosed hole walls is perpendicular to the assembly surface.

[0024] According to one embodiment of the present invention, a transition groove is provided on the assembly surface, and the transition groove is located on one side of the mating area between the first shaft hole body and the second shaft hole body.

[0025] According to one embodiment of the present invention, the track surface is provided with a sewage discharge groove, the sewage discharge groove includes a plurality of toothed sewage discharge grooves arranged at intervals on the front side of the track surface and a sewage discharge elongated groove arranged in the middle of the track surface, the two sewage outlets of the sewage discharge elongated groove are located at the left and right ends of the track surface, and the two sewage outlets are connected by a wavy channel.

[0026] In addition, to achieve the above objectives, this utility model also proposes a track assembly.

[0027] A track assembly includes a plurality of track blocks as described above, the plurality of track blocks being connected end to end in sequence, and the first shaft hole and second shaft hole of adjacent track blocks being connected by track pins.

[0028] In addition, to achieve the above objectives, this utility model also proposes a tracked trolley.

[0029] A track assembly includes a track assembly as described above and a wheel system, the track assembly cooperating with the wheel system.

[0030] According to one embodiment of the present invention, the wheel system includes a track wheel located in the middle of the track assembly and tension wheels located at both ends of the track assembly. The track wheel and the tension wheel are provided with anti-detachment grooves on their rims that cooperate with the limiting protrusions of the track blocks.

[0031] Compared with the prior art, the beneficial effects of this utility model are as follows: By setting the first and second shaft holes forming the hinge structure as segmented shaft holes, and setting the segmented shaft holes as multi-segment semi-enclosed hole walls, the adjacent two segments of semi-enclosed hole walls form staggered vertical or opposite support surfaces, which facilitates the integral molding of the hinge hole by the mold, effectively improving the processing accuracy and assembly accuracy, thereby improving the track stability and service life; even if there are protrusions on both sides of the track block, the semi-enclosed hole wall setting can effectively avoid interference from the protrusions, and has strong adaptability to different track block designs; moreover, the track block can be produced by mold, avoiding the use of high-precision equipment for machining, which can effectively reduce production costs. Attached Figure Description

[0032] Figure 1 and 2 This is a schematic diagram of the track block structure in different directions according to an embodiment of the present invention;

[0033] Figure 3 This is a schematic diagram of the connection between two adjacent track blocks in one embodiment of this utility model;

[0034] Figure 4 This is a bottom view of a track block according to an embodiment of the present invention;

[0035] Figure 5 This is a schematic diagram of the structure of a track assembly according to an embodiment of the present invention;

[0036] Figure 6 yes Figure 5 A magnified view of a portion of circle A in the center;

[0037] Figure 7 This is a schematic diagram of the structure of a tracked trolley according to an embodiment of the present invention;

[0038] Figure 8 This is a schematic diagram of the structure of the track assembly and wheel system in one embodiment of the present invention.

[0039] In the picture:

[0040] 1. Track block body; 11. Track surface; 111. Toothed sewage groove; 112. Sewage discharge groove; 112a. Sewage outlet; 112b. Wavy channel; 12. Assembly surface; 121. Transition groove; 2. Limiting protrusion; 3. Connecting part; 31. First shaft hole body; 31a. First semi-enclosed hole wall; 31b. Second semi-enclosed hole wall; 31c. Third semi-enclosed hole wall; 32. Second shaft hole body; 321. Independent segmented shaft hole; 321a. Fourth semi-enclosed hole wall; 321b. Fifth semi-enclosed hole wall; 4. Track pin;

[0041] 10. Track block; 20. Track wheel; 201. Track wheel anti-derailment groove; 30. Tensioner wheel; 301. Tensioner wheel anti-derailment groove. Detailed Implementation

[0042] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present utility model or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0043] like Figure 1-3 As shown, a track block according to an embodiment of the present invention includes a track block body 1, an optional limiting protrusion 2, and a connecting portion 3. The bottom surface and top surface of the track block body 1 are respectively configured as a track surface 11 and a mounting surface 12. Two adjacent track blocks are rotatably connected through the connecting portion 3 on the mounting surface 12. Specifically, the connecting portion 3 includes a first shaft hole 31 and a second shaft hole that can cooperate with each other to form a hinge structure.

[0044] To facilitate the integral molding of the connecting part 3 and the track block body 1, the holes of the first shaft hole body 31 and the second shaft hole are set as segmented shaft holes. The segmented shaft hole includes at least two semi-enclosed hole walls. Adjacent two semi-enclosed hole walls form staggered vertical or opposite support surfaces, so that the track pin 4 can hinge adjacent track blocks together through the semi-enclosed hole walls (e.g., Figure 3 (As shown). Specifically, the connecting part 3 and the track block body 1 can be integrally formed by means of mold casting or injection molding, etc., and this embodiment does not limit this.

[0045] Thus, during the forming process of the connecting part 3 and the track block body 1, the core of the track block of this utility model can be directly pulled from the opening direction along the semi-enclosed hole wall forming the segmented shaft hole, avoiding interference from other structures on the track block body 1, such as the limiting protrusion 2, during core pulling. It is highly adaptable to different track block designs and has strong adaptability to core pulling interference. Compared with machining using ordinary equipment, the machining accuracy is high, which helps to improve the assembly accuracy of the track pin and the hinge hole, thereby improving the track stability and service life. Moreover, the track block can be produced by mold without the need for machining with high-precision equipment, which can effectively reduce production costs.

[0046] It is understandable that the connecting part 3 can not only serve as a connecting structure between two adjacent track blocks, but also as a limiter for the track wheels between track assemblies. For example, the utility model patent with patent number "201280011302.8" and titled "Tracked Walking Mechanism" discloses a track block. In order to limit the range of motion of the track wheels, a curved running surface is designed at the connecting part of the track block to conform to the shape of the track wheel edge. Not only does the connecting part have to bear the pressure and wear from the track wheels during track movement, but the track pins used to connect the connecting parts of two adjacent track blocks also have to bear the pressure from the track wheels. Especially when the track turns or crosses obstacles, the track pins need to bear multiple combined stresses such as radial shear force, axial torsional load, and impact vibration at the same time. The local contact stress can exceed the material fatigue limit, resulting in plastic deformation and contact fatigue cracks on the surface, accelerating the damage of the track pins and shortening their service life. Moreover, track blocks can be produced by molds without the need for high-precision machining equipment, which can effectively reduce production costs.

[0047] In one embodiment of this utility model, a limiting protrusion 2 may be provided on the mounting surface 12. The limiting protrusion may be provided on both sides of the connecting part 3 to limit the range of motion of the track wheel, so that when the track wheel and the track block are engaged, the pressure brought by the track wheel is mainly borne by the limiting protrusion 2 and the mounting surface 12.

[0048] Thus, the track block of this utility model limits the range of motion of the track wheel by setting a limiting protrusion 2 on the assembly surface 12, which can prevent the connecting part 3 from directly bearing the pressure of the track wheel and reduce the stress between the track pin 4 and the connecting part 3; the misaligned support surface formed by multiple semi-enclosed hole walls between the first shaft hole body 31 and the second shaft hole body 32 can distribute the load to multiple contact points in the segmented shaft hole, reduce local wear, and ensure the service life of the track pin 4.

[0049] In one embodiment of this invention, the track block body 1, the limiting protrusion 2, and the connecting part 3 can be integrally formed to ensure the strength of the track block. In some other embodiments of this invention, the track block body 1, the limiting protrusion 2, and the connecting part 3 can also be fixed together by welding, bonding, or other methods according to actual needs; this embodiment does not impose any limitations on this.

[0050] In one embodiment of this utility model, the connecting part 3 of two adjacent track blocks is rotatable along the track pin 4. In order to avoid the gap between two adjacent track blocks being too large, which would cause mud, sand and other debris to get stuck between the two track blocks and affect the normal movement of the track, the rotation axis of the two adjacent track blocks can be set not to protrude from the edge of the track block body 1 of one of the track blocks, so as to reduce the gap between the opposite surfaces of the adjacent track blocks.

[0051] like Figure 2As shown, in one embodiment of this utility model, the first shaft hole body 31 may include three semi-enclosed hole walls, namely the first semi-enclosed hole wall 31a, the second semi-enclosed hole wall 31b, and the third semi-enclosed hole wall 31c. The opening directions of the semi-enclosed hole walls located on both sides, namely the first semi-enclosed hole wall 31a and the third semi-enclosed hole wall 31c, are the same and perpendicular to the assembly surface 12. The opening direction of the semi-enclosed hole wall located in the middle, namely the second semi-enclosed hole wall 31b, is parallel to the assembly surface 12. This means that even if the outermost end of the first shaft hole body 31 does not extend beyond the edge of the assembly surface 12, core pulling can still be performed along the opening directions of the semi-enclosed hole walls (31a, 31b, 31c) without considering the limiting protrusion 2 or other structures on the assembly surface 12 affecting the normal core pulling process. In some other embodiments of the present invention, other core-free methods such as lost-wax casting can also be used to integrally form the track block. The opening directions of the first semi-enclosed hole wall 31a and the third semi-enclosed hole wall 31c located on both sides may not be perpendicular to the assembly surface 12, and the opening direction of the second semi-enclosed hole wall 31b located in the middle may not be parallel to the assembly surface 12. The opening directions of the first semi-enclosed hole wall 31a and the third semi-enclosed hole wall 31c located on both sides only need to be different from the opening direction of the semi-enclosed hole wall 31b located in the middle. This embodiment does not impose any limitations.

[0052] like Figure 2 As shown, in one embodiment of the present invention, the second shaft hole body 32 may include two independent segmented shaft holes 321, so that the two independent segmented shaft holes 321 can respectively disperse the stress between the track pin and the connecting part 3 on both sides of the first shaft hole body 31. The two independent segmented shaft holes 321 may each include two semi-enclosed hole walls, namely the fourth semi-enclosed hole wall 321a and the fifth semi-enclosed hole wall 321b. The opening direction of the two semi-enclosed hole walls (321a, 321b) is perpendicular to the assembly surface 12.

[0053] It is understandable that when the opening directions of the semi-enclosed hole walls (321a, 321b) of the second shaft hole body 32 and the opening directions of the semi-enclosed hole walls (31a, 31c) located on both sides of the first shaft hole body 31 are perpendicular to the assembly surface 12, the core pulling of these six semi-enclosed hole walls can be achieved simultaneously during core pulling, which facilitates mold design, reduces production costs, and improves production efficiency. In some other embodiments of this utility model, the opening directions of the fourth semi-enclosed hole wall 321a and the fifth semi-enclosed hole wall 321b can also be set according to actual needs, and this embodiment does not impose any limitations.

[0054] like Figure 3As shown, in one embodiment of the present invention, a transition groove 121 may be provided on the assembly surface 12. The transition groove 121 is located on one side of the mating point between the first shaft hole body 31 and the second shaft hole body 32. The transition groove 121 provides a certain amount of space for two adjacent track blocks to move, so that the track blocks can adaptively adjust their posture during travel and reduce wear between adjacent track blocks and between the track blocks and the traveling surface.

[0055] like Figure 4 As shown, in one embodiment of this utility model, to prevent debris such as mud and sewage from affecting the normal movement of the track, a drainage trough can be provided on the track surface 11. Specifically, the drainage trough may include a plurality of spaced toothed drainage troughs 111 disposed on the front side of the track surface 11 and a long drainage trough 112 disposed in the middle of the track surface 11. The two outlets 112a of the long drainage trough 112 are located at the left and right ends of the track surface 11, and the two outlets can be connected by a wave-shaped channel 112b. The toothed drainage troughs 111 can discharge debris between two adjacent track blocks, and the long drainage trough 112 can discharge debris from the track surface 11 from the outlets on both sides, thereby improving the grip of the track blocks relative to the traveling surface and preventing the track from slipping.

[0056] In addition, to achieve the above objectives, this utility model also proposes a track assembly.

[0057] like Figure 5 and 6 As shown, the track assembly of this utility model embodiment includes a plurality of track blocks 10 as described above. The plurality of track blocks 10 are connected end to end in sequence, and the first shaft hole body 31 and the second shaft hole body 32 of adjacent track blocks 10 are connected by track pins 4.

[0058] The track assembly of this utility model embodiment, since it includes the track blocks as described above, also has the aforementioned beneficial effects.

[0059] In addition, to achieve the above objectives, this utility model also proposes a tracked trolley.

[0060] like Figure 7 and 8As shown, the tracked trolley of this embodiment includes a track assembly and a wheel system as described above, with the track assembly and wheel system cooperating. Specifically, the wheel system may include a track wheel 20 located in the middle of the track assembly and tension wheels 30 located at both ends of the track assembly. The track wheel 20 and tension wheels 30 may have anti-derailment grooves on their rims that cooperate with the limiting protrusions 2 of the track block 10, namely, track wheel anti-derailment groove 201 and tension wheel anti-derailment groove 301, so that both the track wheel 20 and the tension wheel 30 can be limited by the anti-derailment grooves (201, 301) and the limiting protrusions 2 on the track block 10. In some other embodiments of this utility model, guide wheels may be provided at one or both ends of the track assembly instead of tension wheels, etc., and this embodiment does not impose any limitations.

[0061] The tracked trolley of this utility model embodiment, since it includes the track assembly as described above, also has the aforementioned beneficial effects.

[0062] In the description of this utility model, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. "A plurality of" means two or more, unless otherwise explicitly specified.

[0063] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0064] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0065] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0066] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A track block, comprising a track block body (1) and a connecting portion (3), wherein the bottom surface and top surface of the track block body (1) are respectively configured as a track surface (11) and a mounting surface (12), and two adjacent track blocks are rotatably connected by the connecting portion (3) on the mounting surface (12), wherein the connecting portion (3) comprises a first shaft hole (31) and a second shaft hole (32) capable of mutually cooperating to form a hinge structure, characterized in that, The connecting part (3) and the track block body (1) are integrally formed. The holes of the first shaft hole body (31) and the second shaft hole body (32) are segmented shaft holes. The segmented shaft holes include at least two semi-enclosed hole walls, and adjacent two semi-enclosed hole walls form staggered vertical or opposite support surfaces.

2. The track block according to claim 1, characterized in that, The mounting surface (12) is provided with a limiting protrusion (2), which is located on both sides of the connecting part (3). The limiting protrusion (2) is used to limit the range of motion of the track wheel.

3. The track block according to claim 2, characterized in that, The track block body (1), the limiting protrusion (2), and the connecting part (3) are integrally formed.

4. The track block according to claim 1, characterized in that, The connecting part (3) of two adjacent track blocks is rotatable along the track pin (4), and the rotation axis of the two adjacent track blocks does not protrude from the edge of the track block body (1) of one of the track blocks.

5. The track block according to claim 1, characterized in that, The first shaft hole body (31) includes three semi-enclosed hole walls. The opening directions of the semi-enclosed hole walls on both sides are the same and perpendicular to the assembly surface (12), and the opening direction of the semi-enclosed hole wall in the middle is parallel to the assembly surface (12).

6. The track block according to claim 1, characterized in that, The second shaft hole body (32) includes two independent segmented shaft holes (321), each of which includes two semi-enclosed hole walls, and the opening direction of the two semi-enclosed hole walls is perpendicular to the assembly surface (12).

7. The track block according to claim 1, characterized in that, A transition groove (121) is provided on the assembly surface (12), and the transition groove (121) is located on one side of the mating point between the first shaft hole body (31) and the second shaft hole body (32).

8. The track block according to claim 1, characterized in that, The track surface (11) is provided with a sewage discharge trough, which includes a plurality of spaced toothed sewage discharge troughs (111) disposed on the front side of the track surface (11) and a sewage discharge long trough (112) disposed in the middle of the track surface (11). The two sewage outlets (112a) of the sewage discharge long trough (112) are located at the left and right ends of the track surface (11), and the two sewage outlets (112a) are connected by a wave-shaped channel (112b).

9. A track assembly, characterized in that, include: Multiple track blocks (10) as described in any one of claims 1-8, the multiple track blocks (10) are connected end to end, and the first shaft hole body (31) and the second shaft hole body (32) of adjacent track blocks (10) are connected by track pins (4).

10. A tracked trolley, characterized in that, Includes the track assembly and wheel system as described in claim 9, wherein the track assembly cooperates with the wheel system, and the wheel system includes a track wheel (20) located in the middle of the track assembly and tension wheels (30) located at both ends of the track assembly.

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