Crawler frame structure and excavator

Abstract

The utility model relates to the technical field of engineering machinery, in particular to a track frame structure and an excavator. The track frame structure comprises a connecting base, two track beams and at least one pair of first connecting pieces, and the two track beams are oppositely arranged and used for supporting tracks. The first connecting pieces are arranged between the two crawler beams, connecting parts are arranged on the first connecting pieces, and the connecting parts of each pair of first connecting pieces are in lap joint with the two crawler beams respectively. The connecting base is arranged on the first connecting pieces, and the first connecting pieces jointly support the connecting base. According to the crawler belt frame structure and the excavator, the connecting strength between the first connecting piece and the crawler belt beam is improved, the possibility of breakage of the connecting position is reduced, and therefore the possibility of damage to the crawler belt frame structure is reduced, and the reliability is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of engineering machinery, and in particular to a track frame structure and an excavator. BACKGROUND

[0002] Excavators can be divided into track-type excavators and wheel-type excavators according to different walking modes, wherein the track-type excavators use tracks as walking devices, have a large ground contact area and strong traction, and are suitable for working on various complex and uneven terrains. In order to enable the track-type excavators to work in narrow or limited spaces, a retractable track frame structure is usually used.

[0003] In the related art, the retractable track frame structure includes a connecting seat, two supports and two sliding rails. The two supports are symmetrically arranged, one end of the sliding rail is correspondingly connected to the side wall of the support, and the other end of the sliding rail is inserted into the connecting seat. The connecting seat is used to support the upper frame of the excavator. By driving the two supports to move closer to or away from each other, the distance between the two supports can be changed.

[0004] However, the existing track frame structure is prone to damage when bearing a large load, and has poor reliability. CONTENT OF THE INVENTION

[0005] The present application provides a track frame structure and an excavator, which improves the connection strength between the first connecting piece and the track beam, reduces the possibility of fracture at the connection, thereby reducing the possibility of damage to the track frame structure and improving the reliability.

[0006] In a first aspect, the present application provides a track frame structure, which includes a connecting seat, two track beams and at least one pair of first connecting pieces. The two track beams are arranged opposite to each other, and the track beam is used to support the track.

[0007] The first connecting piece is arranged between the two track beams, and the first connecting piece has a connecting portion. The connecting portions of each pair of first connecting pieces are respectively overlapped on the two track beams.

[0008] The connecting seat is arranged on the first connecting piece, and the connecting seat is commonly supported by the first connecting pieces.

[0009] In a possible implementation manner, the present application provides a track frame structure, and the connecting portion is an extension portion of the end portion of the first connecting piece.

[0010] In a possible implementation manner, the present application provides a track frame structure, and the first connecting piece has an abutting portion. The abutting portion is in abutment with the outer side wall of the track beam.

[0011] In a possible implementation manner, the present application provides a track frame structure, and the abutting portion and the connecting portion are transitioned through a circular arc.

[0012] In one possible implementation, the track frame structure provided in this application has two pairs of first connectors. The first connectors located on the same track beam are spaced apart along the extension direction of the track beam, and the first connectors located on the same track beam are parallel to each other.

[0013] In one possible implementation, the track frame structure provided in this application has a hollow tube as the first connecting member.

[0014] In one possible implementation, the track frame structure provided in this application has a polygonal outer wall for the first connecting member.

[0015] In one possible implementation, the track frame structure provided in this application further includes at least one pair of second connectors, which correspond to the connection between the connecting part and the track beam.

[0016] In one possible implementation, the track frame structure provided in this application has a connecting hole on the second connector for connecting a support plate for supporting the track.

[0017] Secondly, this application also provides an excavator, including an excavator body and any of the track frame structures provided in the first aspect above, disposed on the excavator body.

[0018] The track frame structure and excavator provided in this application include a connecting seat, two track beams, and at least one pair of first connecting members. The two track beams are arranged opposite each other and support the tracks. The first connecting members are located between the two track beams and have connecting portions. The connecting portions of each pair of first connecting members overlap the two track beams, thereby increasing the connection strength. The connecting seat is located on the first connecting members, and all the first connecting members collectively support the connecting seat. The track frame structure and excavator provided in this application improve the connection strength between the first connecting members and the track beams, reduce the possibility of breakage at the connection point, thereby reducing the likelihood of damage to the track frame structure and improving reliability. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the track frame structure provided in the embodiments of this application;

[0021] Figure 2 for Figure 1Structural schematic diagram of the middle track beam, the first connecting component, and the second connecting component;

[0022] Figure 3 for Figure 2 A structural diagram from another angle;

[0023] Figure 4 for Figure 2 Another structural diagram from a different angle.

[0024] Explanation of reference numerals in the attached figures:

[0025] 100-Connector;

[0026] 200-track beam;

[0027] 300 - First connector; 310 - Connecting part; 320 - Abutting part;

[0028] 400 - Second connector; 410 - Connecting hole.

[0029] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0030] First, those skilled in the art should understand that these embodiments are merely for explaining the technical principles of this application and are not intended to limit the scope of protection of this application. Those skilled in the art can make adjustments as needed to adapt to specific application scenarios.

[0031] Secondly, it should be noted that, in the description of this application, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, an indirect connection through an intermediate medium, or 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 application according to the specific circumstances.

[0032] Furthermore, it should be noted that in the description of this application, the terms "upper," "lower," "front," "back," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application 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 application.

[0033] Furthermore, 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 technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0034] As shown in the background section, in the prior art, the retractable track frame structure includes a connecting seat, two brackets and two slide rails. The two brackets are symmetrically arranged, one end of the slide rail is connected to the side wall of the bracket, and the other end of the slide rail is inserted into the connecting seat. The connecting seat is used to support the upper frame of the excavator.

[0035] Because there is a gap between the connecting seat and the supporting surface (such as the ground), the telescopic track frame structure provides support for the connecting seat through the bracket and the slide rail. The load of the upper frame is transferred to the slide rail and the bracket through the connecting seat. When the slide rail is subjected to a large load, it is easy for it to break at the connection with the bracket, which will cause damage to the track frame structure and result in poor reliability.

[0036] Based on this, the track frame structure and excavator provided in this application include a track frame structure with a connecting seat, two track beams, and at least one pair of first connecting members. The two track beams are arranged opposite each other and support the tracks. The first connecting members are located between the two track beams and have connecting portions. The connecting portions of each pair of first connecting members overlap the two track beams, thereby increasing the connection strength. The connecting seat is located on the first connecting members, and all the first connecting members together support the connecting seat. The track frame structure and excavator provided in this application improve the connection strength between the first connecting members and the track beams, reduce the possibility of breakage at the connection point, thereby reducing the likelihood of damage to the track frame structure and improving reliability.

[0037] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions in the embodiments of this application will be described in more detail below with reference to the accompanying drawings. In the drawings, the same or similar reference numerals denote the same or similar components or components having the same or similar functions throughout. The described embodiments are some, but not all, of the embodiments of this application. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0038] Figure 1 This is a schematic diagram of the track frame structure provided in the embodiments of this application; Figure 2 for Figure 1Structural diagram of the middle track beam, the first connecting member, and the second connecting member.

[0039] Reference Figure 1 and Figure 2 As shown, the track frame structure provided in this application includes: a connecting seat 100, two track beams 200 and at least one pair of first connecting members 300. The two track beams 200 are arranged opposite to each other and are used to support the tracks.

[0040] The first connector 300 is disposed between the two track beams 200. The first connector 300 has a connecting part 310, and the connecting part 310 of each pair of first connectors 300 overlaps the two track beams 200 respectively.

[0041] The connector 100 is disposed on the first connector 300, and all the first connectors 300 together support the connector 100.

[0042] It should be noted that the track frame structure provided in this application embodiment can be either telescopic or fixed. The track frame structure includes, but is not limited to, construction machinery such as excavators, bulldozers, cranes, and loaders. This application uses an excavator as an example to illustrate the track frame structure.

[0043] Understandably, the two track beams 200 are positioned opposite each other to keep the track frame structure balanced and prevent tilting or shifting. The track beams 200 provide support for the tracks, maintaining their flatness and stability during use.

[0044] By providing a connecting part 310 on the first connecting member 300, the connecting part 310 overlaps with the track beam 200, so that the stress distribution is more uniform, local stress concentration is reduced, and bending moment is reduced, thereby improving the connection strength between the first connecting member 300 and the track beam 200, reducing the possibility of breakage at the connection, reducing the possibility of damage to the track frame structure, and improving reliability.

[0045] In specific implementation, the connecting part 310 can be connected to the track beam 200 by welding or bolting, or other fixing methods can be used. This application embodiment does not impose too many restrictions on this.

[0046] The connecting seat 100 is mounted on the first connecting member 300. The connecting seat 100 provides a bearing platform for the excavator's upper frame, which can directly bear the load of the excavator's upper frame and transmit the force to the first connecting member 300 and the track beam 200.

[0047] It should be noted that the connector 100 can be sleeved on the first connector 300 or snapped onto the first connector 300. This application embodiment does not impose too many restrictions on this.

[0048] Each of the first connecting parts 300 supports the connecting seat 100 together, so that the connecting seat 100 is away from the support surface (such as the ground). This reduces the contact between the connecting seat 100 and the support surface, reduces the risk of wear and damage, and also reduces the collision between the connecting seat 100 and ground obstacles (such as rocks and tree roots), so that the excavator can move more effectively in various complex terrain conditions.

[0049] It should also be noted that the track beam 200, the first connecting member 300, and the connecting seat 100 can all be made of high-strength materials, such as steel or alloys, to ensure their durability and reliability under high load conditions.

[0050] Understandably, compared to existing track frame structures, the slide rail is prone to breakage at the connection with the support when subjected to large loads, leading to damage to the track frame structure and poor reliability. The track frame structure and excavator provided in this application, wherein the track frame structure comprises a connecting seat 100, two track beams 200, and at least one pair of first connecting members 300. The two track beams 200 are arranged opposite each other and support the tracks. The first connecting members 300 are disposed between the two track beams 200 and have connecting portions 310. The connecting portions 310 of each pair of first connecting members 300 overlap the two track beams 200, thereby improving connection strength. The connecting seat 100 is disposed on the first connecting members 300, and all the first connecting members 300 together support the connecting seat 100. The track frame structure and excavator provided in this application improve the connection strength between the first connecting member 300 and the track beam 200, reduce the possibility of breakage at the connection, thereby reducing the possibility of damage to the track frame structure and improving reliability.

[0051] Figure 3 for Figure 2 A structural diagram from another angle.

[0052] In some embodiments, refer to Figure 3 As shown, the connecting part 310 is an extension of the end of the first connecting member 300.

[0053] Understandably, the first connector 300 overlaps with the track beam 200 through its extension, allowing the load to be smoothly transferred from the first connector 300 to the track beam 200. This reduces local stress concentration, increases the bending and torsional resistance of the first connector 300, improves its strength and load-bearing capacity, and reduces the possibility of breakage at the connection between the first connector 300 and the track beam 200.

[0054] In some embodiments, refer to Figure 3 As shown, the first connector 300 has an abutment portion 320, which abuts against the outer side wall of the track beam 200.

[0055] It should be noted that the abutment part 320 abuts against the outer wall of the track beam 200, providing an additional support point, improving the stability of the first connector 300, reducing the displacement and swaying of the first connector 300 under load, and improving the reliability of the track frame structure.

[0056] In some embodiments, refer to Figure 3 As shown, the abutting part 320 and the connecting part 310 are transitioned by an arc.

[0057] It should be noted that a circular arc transition can distribute stress more evenly in the transition area, effectively reducing stress concentration and thus lowering the risk of material fatigue and fracture.

[0058] In some embodiments, refer to Figure 1 As shown, there are two pairs of first connectors 300. The first connectors 300 on the same track beam 200 are spaced apart along the extension direction of the track beam 200, and the first connectors 300 on the same track beam 200 are parallel to each other.

[0059] Specifically, by setting two pairs of first connecting members 300, multi-point support is provided, which increases the stability of the entire track frame structure, helps resist overturning and lateral movement, and improves the overall stability and safety.

[0060] It should be noted that the spaced first connectors 300 can distribute and transmit the load from the connector 100 more evenly, reduce local stress concentration, and lower the risk of structural fatigue and damage.

[0061] Figure 4 for Figure 2 Another structural diagram from a different angle.

[0062] In some embodiments, refer to Figure 4 As shown, the first connector 300 is a hollow tube.

[0063] Understandably, the hollow structure reduces the weight of the first connecting piece 300 while maintaining strength, which can improve the operational flexibility of the track frame structure.

[0064] Hollow tubes also have a high moment of inertia, which makes them perform better when subjected to bending and torsional loads. Compared with solid rods, hollow tubes provide higher bending stiffness and torsional strength for the same weight.

[0065] In some embodiments, refer to Figure 4 As shown, the outer wall of the first connector 300 is polygonal.

[0066] It should be noted that a polygonal outer wall can provide higher structural strength and rigidity. Compared to a circular cross-section, a polygonal cross-section can increase resistance to bending and torsion. For example, the first connector 300 can be hexagonal, and the top and bottom surfaces of the first connector 300 can be arranged in a horizontal direction.

[0067] In some embodiments, refer to Figure 2 and Figure 3 As shown, the track frame structure also includes at least one pair of second connectors 400, which are respectively connected to the connecting part 310 and the track beam 200.

[0068] The second connector 400 connects the connecting part 310 to the track beam 200, forming a more stable overall structure that can better resist external loads. The second connector 400 can also effectively disperse the stress at the connection point, reduce stress concentration, and thus improve the tensile, shear, and bending resistance of the connection point.

[0069] In practical implementation, the second connecting member 400 can be a reinforcing rib. The cross-sectional shape of the reinforcing rib can be triangular, trapezoidal, or rectangular, or other shapes. The dimensions of the reinforcing rib (such as thickness and height) should be calculated and determined based on the load size and material strength to ensure that it can withstand the expected stress. The reinforcing rib can be connected to the connecting part 310 and the track beam 200 by welding, bolting, or riveting.

[0070] In some embodiments, refer to Figure 2 As shown, the second connector 400 has a connection hole 410 for connecting a support plate for the track.

[0071] It should be noted that by setting a support plate, the support plate can provide support for the track, thereby reducing the sagging of the track and maintaining the flatness and stability of the track. By providing a connection hole 410 on the second connector 400, a connection position is provided for the support plate. For example, the connection hole 410 can be a threaded hole, and the support plate is connected to the second connector 400 by bolts.

[0072] This application also provides an excavator, including an excavator body and a track frame structure mounted on the excavator body.

[0073] The specific structure and working method of the track frame structure have been described in detail in the above embodiments, and will not be repeated here.

[0074] Those skilled in the art will understand that the track frame structure and excavator provided in this application, wherein the track frame structure comprises a connecting seat 100, two track beams 200, and at least one pair of first connecting members 300. The two track beams 200 are arranged opposite to each other and are used to support the tracks. The first connecting members 300 are disposed between the two track beams 200 and have connecting portions 310 thereon. The connecting portions 310 of each pair of first connecting members 300 overlap the two track beams 200, thereby improving the connection strength. The connecting seat 100 is disposed on the first connecting members 300, and all the first connecting members 300 together support the connecting seat 100. The track frame structure and excavator provided in this application improve the connection strength between the first connecting members 300 and the track beams 200, reduce the possibility of breakage at the connection point, thereby reducing the possibility of damage to the track frame structure and improving reliability.

[0075] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "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 this application. 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.

[0076] It is understood that the various numerical designations used in the embodiments of this application are merely for descriptive convenience and are not intended to limit the scope of the embodiments of this application.

[0077] The technical solutions of this application have been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of this application is obviously not limited to these specific embodiments. Without departing from the principles of this application, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the scope of protection of this application.

Claims

1. A track frame structure, characterized in that, include: Two track beams are arranged opposite each other, and the track beams are used to support the tracks; At least one pair of first connectors are disposed between the two track beams, and the first connectors have connecting portions, wherein the connecting portions of each pair of first connectors overlap the two track beams respectively; A connector is disposed on the first connector, and all the first connectors together support the connector.

2. The track frame structure according to claim 1, characterized in that, The connecting portion is an extension of the end of the first connector.

3. The track frame structure according to claim 1, characterized in that, The first connector has an abutting portion that abuts against the outer side wall of the track beam.

4. The track frame structure according to claim 3, characterized in that, The abutting part and the connecting part are transitioned by an arc.

5. The track frame structure according to any one of claims 1 to 4, characterized in that, The number of the first connectors is two pairs. The first connectors located on the same track beam are spaced apart along the extension direction of the track beam, and the first connectors located on the same track beam are parallel to each other.

6. The track frame structure according to any one of claims 1 to 4, characterized in that, The first connector is a hollow tube.

7. The track frame structure according to claim 6, characterized in that, The outer wall of the first connector is polygonal.

8. The track frame structure according to any one of claims 1 to 4, characterized in that, It also includes at least one pair of second connectors, which correspondingly connect the connecting part to the track beam.

9. The track frame structure according to claim 8, characterized in that, The second connector has a connecting hole for connecting a support plate that supports the track.

10. An excavator, characterized in that, It includes an excavator body and a track frame structure as described in any one of claims 1 to 9, which is mounted on the excavator body.

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