Crawler belt tensioning structure and excavator

Abstract

The utility model provides a track tensioning structure and an excavator, and relates to the field of track tensioning. The crawler belt tensioning structure comprises a driving assembly used for driving a tensioning wheel of a crawler belt to move so as to tension the crawler belt; the indicating piece is arranged in the telescopic direction of the driving assembly and used for indicating the initial tensioning position; and the limiting piece is used for being arranged on the crawler belt, the limiting piece is provided with a limiting part, the limiting part is located on one side of the indicating piece, and the limiting part is used for limiting the moving distance of the tensioning wheel. The driving assembly drives the tensioning wheel of the crawler belt to move to adjust the tensioning of the crawler belt, and the indicating piece indicates the initial tensioning position, so that an adjusting reference is provided for operators, and the tensioning state of the crawler belt is conveniently and visually adjusted. When the driving assembly drives the tensioning wheel to move to the maximum tensioning distance, the driving assembly abuts against the limiting part at the moment to limit movement of the tensioning wheel, and therefore the crawler belt is prevented from being excessively tensioned, the crawler belt is located in a reasonable tensioning interval all the time, and the service life of the crawler belt is prolonged.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of track tensioning, in particular to a track tensioning structure and excavator. BACKGROUND

[0002] The excavator is a kind of construction and mining equipment, which is used in the field of engineering construction and ore mining. The track tensioning state of the excavator affects the driving condition of the excavator. The track tensioning state is adjusted by the tensioning wheel arranged on the tensioning wheel guard plate. The extension rod of the tensioning oil cylinder is connected with the tensioning wheel. When the track needs to be tensioned, the oil is sent into one chamber of the tensioning oil cylinder to drive the extension rod to move the tensioning wheel in the direction of tensioning the track.

[0003] In the prior art, the operator relies on experience to add oil to the tensioning oil cylinder to adjust the track tensioning.

[0004] However, the above method is not accurate in judging the track tensioning position, which may easily lead to over-tensioning of the track and affect the service life of the track. CONTENT OF THE INVENTION

[0005] The present application provides a track tensioning structure and excavator to solve the problem of inaccurate track tensioning position judgment in the prior art, which may easily lead to over-tensioning of the track and reduce the service life of the track.

[0006] In order to achieve the above purpose, the technical scheme of the present application is as follows:

[0007] On the one hand, the present application provides a track tensioning structure, comprising:

[0008] A driving assembly for driving the tensioning wheel of the track to move to tension the track;

[0009] An indicating member arranged in the extension direction of the driving assembly for indicating the initial tensioning position;

[0010] A limiting member arranged on the track, the limiting member having a limiting portion on one side of the indicating member, the limiting portion being used to limit the movement distance of the tensioning wheel.

[0011] In one possible implementation, the track tensioning structure in the present application comprises a limiting plate, and the number of the limiting plates is at least one, and the limiting portion is arranged on the limiting plate.

[0012] In one possible implementation, the track tensioning structure in the present application comprises a connecting member inserted on the limiting plate.

[0013] In a possible implementation, the track tensioning structure in the embodiment of the present application, the limiting plate is provided with a limiting step, and the side of the limiting step facing the driving assembly has a connecting side surface to form a limiting part.

[0014] In a possible implementation, the track tensioning structure in the embodiment of the present application, the connecting side surface has an arc-shaped recess, and the arc-shaped angle of the arc-shaped recess is 30 degrees to 180 degrees.

[0015] In a possible implementation, the track tensioning structure in the embodiment of the present application, the connecting side surface has a buffer layer.

[0016] In a possible implementation, the track tensioning structure in the embodiment of the present application, the indicating part is arranged on the limiting part or the indicating part is arranged on the tensioning wheel guard plate of the track.

[0017] In a possible implementation, the track tensioning structure in the embodiment of the present application, the indicating part is an indicating hole or an indicating lamp.

[0018] In a possible implementation, the track tensioning structure in the embodiment of the present application, the limiting part is further provided with an indicating scale.

[0019] On the other hand, the present application provides an excavator comprising a body and the track tensioning structure according to any one of the above embodiments arranged on the body.

[0020] The track tensioning structure and the excavator provided by the present application drive the tensioning wheel of the track to move to tension the track through the driving assembly, the indicating part is arranged in the extension direction of the driving assembly and is used to indicate the initial tensioning position, the limiting part is arranged on the track, the limiting part has a limiting part arranged on one side of the indicating part, and the limiting part is used to limit the movement distance of the tensioning wheel. The driving assembly drives the tensioning wheel of the track to move to adjust the tension of the track, the indicating part indicates the initial tensioning position to provide an adjustment reference for the operator and facilitate intuitive adjustment of the tensioning state of the track. The limiting part is arranged on the track, and the limiting part is arranged on one side of the indicating part to limit the movement distance of the driving assembly. When the driving assembly drives the tensioning wheel to move to the maximum tensioning distance, the limiting part abuts against the limiting part at this time to limit the movement of the tensioning wheel, thereby avoiding excessive tensioning of the track, keeping the track in a reasonable tensioning range, and prolonging the service life of the track. BRIEF DESCRIPTION OF DRAWINGS

[0021] The drawings incorporated into the specification and forming a part thereof, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0022] Figure 1 Structure diagram of the track tensioning structure and the excavator provided by the embodiment of the present application Figure One;

[0023] Figure 2 Structure diagram of the track tensioning structure provided by the embodiment of the present application Figure One ;

[0024] Figure 3 Structure diagram of the track tensioning structure provided by the embodiment of the present application Figure Two ;

[0025] Figure 4 Structure diagram of the track tensioning structure provided by the embodiment of the present application Figure Three ;

[0026] Figure 5 Structure diagram of the limiting plate in the track tensioning structure provided by the embodiment of the present application

[0027] Figure 6 Structure diagram of the track tensioning structure provided by the embodiment of the present application Figure 2 Structure diagram of the track tensioning structure provided by the embodiment of the present application

[0028] Figure 7 Structure diagram of the track tensioning structure provided by the embodiment of the present application Figure Four ;

[0029] Figure 8 Structure diagram of the track tensioning structure provided by the embodiment of the present application Figure Two .

[0030] Explanation of reference signs:

[0031] 100 - indicating member

[0032] 200 - limiting member; 211 - limiting part; 212 - limiting hole

[0033] 210 - limiting plate

[0034] 220 - connecting member

[0035] 230 - limiting step

[0036] 231 - arc-shaped recess

[0037] The specific embodiments of the present application have been shown by the above-mentioned drawings, and will be described in more detail hereinafter. These drawings and textual descriptions are not intended to limit the scope of the concept of the present application by any means, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0038] The exemplary embodiments will be described in detail herein with reference to the attached drawings. The following description is made with reference to the accompanying drawings in which like reference numerals represent like elements or similar elements, unless the context of the description dictates otherwise. The following description of exemplary embodiments is not representative of all embodiments consistent with the present application. Rather, it is merely an example of apparatus and methods consistent with some aspects of the present application as detailed in the appended claims.

[0039] It should be noted that, in the description of the embodiments of the present application, the terms "upper", "lower", "inner", "outer" and the like indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of description, and do not indicate or imply that the device or member must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0040] In addition, it should be noted that the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated, so that the features with "first", "second" can explicitly or implicitly include one or more of the features, and in the description of the present application, the meaning of "multiple" is two or more, unless otherwise explicitly and specifically limited.

[0041] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "fixing" and the like should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integral; it can be mechanical connection, or electrical connection or can communicate with each other; it can be direct connection, or indirect connection through intermediate medium, it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0042] The excavator is a kind of construction and mining equipment, which is used in the field of engineering construction and ore mining. The track tension state of the excavator affects the driving condition of the excavator. The track tension state is adjusted by the tensioning wheel arranged on the tensioning wheel guard plate. The extension rod of the tensioning cylinder is connected with the tensioning wheel. When the track needs to be tensioned, oil is sent into one chamber of the tensioning cylinder to drive the extension rod to move the tensioning wheel in the direction of tensioning the track.

[0043] In existing technology, there are two ways to determine whether the track tension is correct when adjusting the track tension of an excavator. One is to directly observe the position of the tension cylinder's telescopic rod through an opening in the excavator's side plate. The other is to rely on the operator's experience to add oil to the tension cylinder for tensioning. The method of directly observing the position of the tension cylinder's telescopic rod through the opening in the excavator's side plate is limited by the opening's field of vision and observation angle, making it difficult for the operator to accurately judge the track tension. This can easily lead to visual errors, resulting in insufficient or excessive track tension. Secondly, relying solely on the operator's experience to add oil to the tension cylinder for tensioning, like blindly applying grease, also cannot accurately control the tension due to individual differences in experience. This can easily lead to over-tensioning, accelerating track wear and shortening its service life.

[0044] Therefore, the above two methods are inaccurate in judging the track tension position and are prone to causing the track to be over-tensioned, reducing the service life of the track.

[0045] In view of this, embodiments of this application provide a track tensioning structure and an excavator, including: a drive assembly for driving the track tensioning wheel to move, thereby tensioning the track; an indicator, disposed in the extension / retraction direction of the drive assembly, for indicating the initial tensioning position; and a limiting member, disposed on the track, having a limiting portion located on one side of the indicator, the limiting portion for limiting the movement distance of the tensioning wheel. The drive assembly drives the track tensioning wheel to move and adjust the track tension, while the indicator indicates the initial tensioning position, providing an adjustment reference for the operator to intuitively adjust the track tension. By setting the limiting member on the track and positioning the limiting portion on one side of the indicator, the movement distance of the drive assembly is limited. When the drive assembly drives the tensioning wheel to the maximum tensioning distance, it abuts against the limiting portion, restricting the movement of the tensioning wheel, thereby preventing excessive track tension and ensuring the track remains within a reasonable tension range, extending the track's service life.

[0046] The following is combined with Figures 1 to 8 The present application will be described in detail with reference to specific embodiments. Figure 1 Schematic diagram of the track tensioning structure and excavator provided in the embodiments of this application. Figure One ; Figure 2 A schematic diagram of the track tensioning structure provided in the embodiments of this application. Figure One ; Figure 3 A schematic diagram of the track tensioning structure provided in the embodiments of this application. Figure Two ; Figure 4 A schematic diagram of the track tensioning structure provided in the embodiments of this application. Figure Three ; Figure 5 This is a schematic diagram of the limiting plate in the track tensioning structure provided in the embodiments of this application; Figure 6 for Figure 2 Top view of the track tensioning structure; Figure 7Structure diagram of the track tensioning structure provided by the embodiment of the present application Figure Four ; Figure 8 Structure diagram of the track tensioning structure provided by the embodiment of the present application and the excavator Figure Two .

[0047] In one aspect, the present application provides a track tensioning structure, comprising: a driving assembly, the driving assembly being used to drive the movement of a tensioning wheel of a track to tension the track; an indicating piece 100, provided in the extension direction of the driving assembly, used to indicate an initial tensioning position; a limiting piece 200, used to be arranged on the track, the limiting piece 200 being provided with a limiting part 211, the limiting part 211 being located on one side of the indicating piece 100, and the limiting part 211 being used to limit the movement distance of the driving assembly.

[0048] The driving assembly comprises a tensioning oil cylinder, an extension rod and a connecting shaft, the tensioning wheel is sleeved on the connecting shaft, one end of the extension rod is connected with the connecting shaft, and the other end is connected with the tensioning oil cylinder, the tensioning oil cylinder drives the extension rod to move, so that the connecting shaft and the tensioning wheel move to tension the track. When the track needs to be tensioned, the tensioning oil cylinder drives the extension rod to move towards the direction of tensioning the track.

[0049] It should be noted that the side of the limiting part 211 towards the tensioning oil cylinder is provided with an abutting surface, which is used to abut with the moving end of the driving assembly to limit the movement of the driving assembly, indicating that this position is the maximum tensioning position of the track, avoiding over-tensioning of the track.

[0050] Specifically, the limiting part 211 is installed near the tensioning wheel and is detachably connected with the tensioning wheel through a clamping groove and a bolt, ensuring the stability of the limiting part 211 during the operation of the excavator and providing convenience for disassembly and assembly during debugging.

[0051] When the track needs to be tensioned, the oil cylinder exerts pressure, and the extension rod extends outward; when the abutting surface of the limiting part 211 abuts with the extension rod after the extension rod is elongated, the extension rod is prevented from continuing to move outward, marking the maximum tensioning position of the track, avoiding over-tensioning of the track, and preventing the track from being torn or deformed.

[0052] The actual working scene is variable, and the tension of the track needs to be adjusted. In some embodiments, the limiting piece 200 is detachably connected with the tensioning wheel guard plate of the track, and the operator can adjust it according to the actual situation. If the construction site is soft, the track needs to be tightened to prevent the track from sinking too deep, the connecting bolt is loosened, the limiting piece 200 is pushed inward towards the tensioning oil cylinder by a certain distance, and then the connecting bolt is tightened again; when driving on a hard road surface, the track needs to be loosened to reduce resistance, the limiting piece 200 is moved outward away from the tensioning oil cylinder, and the excavator is ensured to maintain a good running state.

[0053] The track tensioning structure in the embodiment of the present application, the driving assembly drives the track tensioning wheel to move to adjust the track tension, the indicating piece 100 indicates the initial tensioning position, which provides an adjustment reference for the operator and facilitates intuitive adjustment of the track tensioning state. The limiting piece 200 is arranged on the track, and the limiting part 211 is located on one side of the indicating piece 100, so as to limit the movement distance of the track tensioning wheel. When the driving assembly drives the track tensioning wheel to move to the maximum tensioning distance, the limiting part 211 abuts against the limiting part 211 at this time, thereby limiting the movement of the track tensioning wheel, so as to avoid excessive tensioning of the track, keep the track in a reasonable tensioning range, prolong the service life of the track, improve the stability and reliability of the overall operation of the excavator, and reduce the equipment maintenance frequency and cost.

[0054] In a possible implementation, the track tensioning structure in the embodiment of the present application, the limiting piece 200 includes a limiting plate 210, and the number of the limiting plate 210 is at least one, and the limiting part 211 is arranged on the limiting plate 210.

[0055] It should be noted that the connecting shaft of the tensioning oil cylinder is connected with the track tensioning wheel, each track tensioning wheel corresponds to one connecting shaft, one connecting shaft can correspond to one limiting plate 210, or one connecting shaft can correspond to two limiting plates 210, so that the stress of the connecting shaft is uniform.

[0056] For example, the limiting plate 210 is provided with two limiting parts 211, and the two limiting parts 211 are arranged along the extension direction of the tensioning oil cylinder to adapt to the maximum tensioning distance of different tracks or construction requirements.

[0057] In a possible implementation, the track tensioning structure in the embodiment of the present application, the limiting part 211 is a connecting piece 220 inserted in the limiting plate 210.

[0058] The limiting piece 200 includes a limiting plate 210 and a connecting piece 220, the limiting plate 210 is provided with a limiting hole 212, the connecting piece 220 is inserted in the limiting hole 212 to form the limiting part 211, and the bottom of the limiting part 211 is higher than the top of the limiting hole 212.

[0059] The number of the limiting hole 212 is at least two, and the number of the connecting piece 220 is at least one, each limiting hole 212 is arranged on the limiting plate 210 along the extension direction of the tensioning oil cylinder, and at least one limiting hole 212 is connected with the connecting piece 220.

[0060] The structure of the connecting piece 220 is not limited in the present application, for example, the connecting piece 220 can be a screw, a bolt, a stud, etc.

[0061] It can be understood that, since the limiting plate 210 is detachably connected with the track tensioning wheel guard plate, the position of the limiting plate 210 can be adjusted according to actual conditions, for example, the track needs to be loosened, the limiting plate 210 is moved outward away from the tensioning oil cylinder, for example, the track needs to be tightened, the limiting plate 210 is moved inward toward the tensioning oil cylinder.

[0062] In a possible implementation, the track tensioning structure in the embodiment of the present application, the limiting plate 210 is provided with a limiting step 230, and the side of the limiting step 230 facing the driving assembly has a connecting side surface to form a limiting portion 211.

[0063] The side of the limiting member 200 facing the tensioning oil cylinder has a limiting step 230, the limiting step 230 is in a stepped shape, the limiting step 230 has a step surface and a connecting side surface, and the connecting side surface is located on the side of the limiting step 230 facing the driving assembly to form a limiting portion 211. The connecting side surface can be a vertical surface for abutting against the telescopic end of the tensioning oil cylinder. When the track is tensioned, the tensioning oil cylinder is driven by hydraulic pressure, the telescopic end is extended to abut against the vertical surface of the limiting step 230 to limit the maximum tensioning position of the track, so that the track is not excessively tensioned and damaged.

[0064] In a possible implementation, the track tensioning structure in the embodiment of the present application, the connecting side surface has an arc-shaped recess 231, and the arc-shaped recess 231 has an arc-shaped angle of 30 degrees to 180 degrees.

[0065] The limiting step 230 is provided with an arc-shaped recess 231, which can be arranged in contact with the tensioning oil cylinder. When the arc-shaped recess 231 is in contact with the end of the tensioning oil cylinder during equipment operation, stress can be dispersed, component friction and collision wear can be reduced, the service life of the equipment can be prolonged, the smooth operation of the track-type mechanical equipment can be ensured, the end can be limited to a certain extent, and the shaking deviation can be reduced.

[0066] The arc-shaped recess 231 can be made of rubber material, and the cross section thereof is in a semicircular shape. The shape is in arc-shaped contact with the end of the tensioning oil cylinder to ensure stable contact.

[0067] The inner side wall surface of the arc-shaped recess 231 is processed with fine texture, and the texture is regularly distributed along the telescopic direction of the oil cylinder to further improve the friction when the oil cylinder abuts against the arc-shaped recess 231, so that the oil cylinder is prevented from slipping during frequent operation, the telescopic precision of the oil cylinder is ensured, and the contact is stable.

[0068] The edge of the arc-shaped recess 231 is thickened to form a convex protective edge, the protective edge enhances the overall structural strength of the arc-shaped recess 231, so that the arc-shaped recess 231 is not easily damaged when subjected to a large impact force of the oil cylinder, and the protective edge can also block dust, sand and other impurities from entering the gap between the oil cylinder and the arc-shaped recess 231, so that the components are prevented from being damaged due to the accumulation of impurities and the guiding precision is affected.

[0069] The arc-shaped angle of the arc-shaped recess 231 is 30 degrees to 180 degrees. For example, when the arc-shaped angle of the arc-shaped recess 231 is 180 degrees, the arc-shaped recess 231 is a semicircular arc-shaped recess, and the opening direction of the arc-shaped recess 231 is towards the oil cylinder.

[0070] The arc-shaped recess 231 can be detachably connected with the limiting step 230, or integrally formed with the limiting step 230. The arc-shaped recess 231 can be detachably connected with the limiting step 230, which is convenient for disassembly when the arc-shaped recess 231 needs to be replaced due to aging or damage, reduces the equipment maintenance cost and difficulty, and ensures the stable and efficient operation of the tracked mechanical equipment.

[0071] The limiting step 230 is provided with a buffer layer on the side towards the tensioning oil cylinder. Specifically, the buffer layer is provided on the connecting side surface and abuts against the driving assembly, which plays a buffering role and reduces the impact.

[0072] The buffer layer can be a rubber layer, and the internal structure of the rubber layer is in a honeycomb shape. The honeycomb-shaped holes are uniformly distributed, and the holes can play a role in dispersing stress and preventing the buffer layer from being damaged due to excessive local stress.

[0073] In a possible implementation, the tracked tensioning structure in the embodiment of the present application, the indicating part 100 is arranged on the limiting part 200 or the indicating part 100 is arranged on the tensioning wheel guard plate of the track. A hole is directly formed on the tensioning wheel guard plate and located on one side of the limiting part 200, and the operation is simple. Of course, the indicating part 100 can also be arranged on the limiting part 200, which is convenient for overall movement and adjustment of the appropriate initial position.

[0074] In a possible implementation, the tracked tensioning structure in the embodiment of the present application, the indicating part 100 is an indicating hole or an indicating lamp.

[0075] When the indicating part 100 is an indicating hole, the indicating hole can be a hole directly formed on the tensioning wheel guard plate and located on one side of the limiting part 200. Of course, the indicating hole can also be arranged on the limiting part 200, for example, the limiting part 200 has an indicating hole to form the indicating part 100, and the diameter of the indicating hole is less than or equal to the diameter of the limiting hole 212. When the indicating part 100 is an indicating lamp, the indicating part 100 can be a sensing indicating lamp, for example, when the tensioning wheel moves to the preset position, the indicating lamp is on.

[0076] In a possible implementation, the tracked tensioning structure in the embodiment of the present application, the limiting part 200 is further provided with an indicating scale.

[0077] The scale lines are equidistantly arranged along the length direction of the limiting member 200, and the interval is based on millimeters as a basic unit. Among them, every 5 millimeters interval has a longer scale line as a main scale, and the color is bright yellow which is eye-catching and wear-resistant, so that the operator can quickly lock the approximate tension interval at a distance under the condition of daily light. The short scale line in between is white, which helps the operator to make a more accurate tension judgment. The main and auxiliary scales are matched, which is suitable for rough estimation or accurate adjustment, and meets the observation scene of different precision requirements.

[0078] In order to facilitate observation in dim light or at night, the surface of the scale line is provided with a fluorescent layer which is made of mixing fluorescent powder and special resin. After absorbing natural light or equipment lighting, the fluorescent layer can emit light itself without separate power supply. Even after repeated light irradiation, wiping and other operations, it can still maintain stable light emitting performance. Even in a dim environment, the operator can clearly see the corresponding position of the scale line and the related parts, and accurately judge the track tension state.

[0079] In addition, the zero scale position of the scale line is accurately aligned with the starting limiting point of the limiting step 230, which can directly take the zero scale as a reference to quickly compare the distance of the tension cylinder extension end deviating from the reference, and then quickly determine the adjustment direction and amplitude of the track tension. In addition, the limiting member 200 near the scale line area is also printed with simple and clear operation prompt marks, such as "tension increase direction" arrow and "tension decrease direction" arrow, as well as recommended tension range values under different working conditions, which improves the convenience and accuracy of the track tension state adjustment of the excavator.

[0080] On the other hand, the application provides an excavator comprising a body and a track tensioning structure as in any one of the preceding embodiments provided on the body.

[0081] The track of the excavator cooperates with the track tensioning structure to ensure the normal operation of the excavator and prolong the service life of the track.

[0082] The track is connected by links and can work for a long time in wet, muddy and other harsh conditions. Its structure has strong tensile capacity and can withstand large tension when the excavator climbs a slope or passes through sandy land, thereby avoiding track rupture and deformation.

[0083] The limiting member 200 is installed near the track tensioning wheel of the track and plays a limiting and supporting role. The limiting step 230 is designed in a stepped shape according to the extension characteristics of the oil cylinder and the track tensioning demand, and is matched with the extension end of the oil cylinder. When the oil cylinder extends and retracts, the step connecting side limits the maximum tension degree of the track to prevent over-tensioning from damaging the track.

[0084] The limiting step 230 is provided with a buffer layer towards the oil cylinder side, the buffer layer is honeycomb-shaped inside, which can reduce its weight and disperse stress, the outer layer is special treated to be flaky, which is wear-resistant and corrosion-resistant, and can provide smooth contact surface when contacting with the oil cylinder to buffer the impact force from the end of the oil cylinder and protect the track, track tensioning structure and oil cylinder.

[0085] The limiting part 200 is provided with indicating scale lines for regulating the track tension, which are equidistantly arranged along the length direction, the main scale is used for preliminary positioning, the short scale is used for fine judgment, the indicating scale line surface is covered with a fluorescent layer to ensure visibility, the zero scale is aligned with the starting limiting point of the limiting step 230, and the operator can quickly adjust according to the scale line to ensure that the excavator maintains a good running state under various working conditions.

[0086] Other embodiments of the application will be apparent to those skilled in the art from consideration of the specification and practice of the application disclosed herein. It is intended that the specification and examples be considered as exemplary only, with the true scope and spirit of the application being indicated by the following claims.

[0087] It should be understood that the application is not limited to the precise construction that has been described above and shown in the accompanying drawings, and that various modifications and changes can be made by those skilled in the art without departing from the scope of the application. The scope of the application is limited only by the appended claims.

Claims

1. A track tensioning structure characterized by, The application relates to a track tensioning structure, which comprises: a driving assembly for driving the movement of a tensioning wheel of the track to tension the track; an indicating part (100) arranged in the extension direction of the driving assembly and used for indicating an initial tensioning position; a limiting part (200) arranged on the track, wherein the limiting part (200) is provided with a limiting portion (211) on one side of the indicating part (100), and the limiting portion (211) is used for limiting the movement distance of the tensioning wheel.

2. The track tensioning structure according to claim 1, characterized by The limiting part (200) comprises at least one limiting plate (210), and the limiting portion (211) is arranged on the limiting plate (210).

3. The track tensioning structure according to claim 2, characterized by The limiting portion (211) is a connecting part (220) inserted into the limiting plate (210).

4. The track tensioning structure according to claim 2, characterized by The limiting plate (210) is provided with a limiting step (230), and the connecting side surface of the limiting step (230) on the side of the driving assembly forms the limiting portion (211).

5. The track tensioning structure according to claim 4, characterized by The connecting side surface is provided with an arc-shaped recess (231), and the arc-shaped angle of the arc-shaped recess (231) is 30-180 degrees.

6. The track tensioning structure according to claim 4 or 5, characterized in that The connecting side surface is provided with a buffer layer.

7. The track tensioning structure according to any one of claims 1 to 5, characterized in that The indicating part (100) is arranged on the limiting part (200) or the indicating part (100) is arranged on the tensioning wheel guard plate of the track.

8. The track tensioning structure according to any one of claims 1 to 5, characterized in that The indicating part (100) is an indicating hole or an indicating lamp.

9. The track tensioning structure according to any one of claims 1 to 5, characterized in that The limiting part (200) is further provided with an indicating scale.

10. An excavator characterized by comprising: The application further relates to a track tensioning structure, which comprises a body and the track tensioning structure as claimed in any one of claims 1-9 arranged on the body.

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