A protection device for a rail connecting bolt of a longitudinal beam of a track-type construction machine

Abstract

The utility model discloses a kind of protection device and caterpillar type engineering machinery of stringer and frame connecting bolt, including protective cover and multiple fasteners;Protective cover is by multiple protection units and is docked according to preset order Composition, for the multiple fixed bolts of the connecting place of car frame and stringer is completely covered in the part of protruding from car frame;Multiple fasteners are configured to be fixed and release fixed between protective cover and car frame.The utility model can effectively prevent soil, gravel and other sundries from invading and impacting the bolt head, prolong the service life of the bolt, reduce the maintenance difficulty, and has the advantages of simple structure, easy installation and low cost.

Description

Technical Field

[0001] This utility model relates to a protective device for the bolts connecting the longitudinal beam and the vehicle frame, belonging to the field of engineering machinery technology. Background Technology

[0002] The excavator's traveling mechanism is one of its core components, in which the longitudinal beam 8 is connected to the frame 1 by multiple high-strength fixing bolts 10, such as... Figure 1 As shown. This connection structure bears enormous working loads and impact loads, making the reliability and integrity of the bolts crucial.

[0003] Currently, the known connection method between the chassis and longitudinal beams is a multi-row bolt connection on the top and sides. This involves a large number of bolts with small spacing between them. During excavator operation, especially in harsh conditions (such as mines or muddy areas), the tracks pick up large amounts of mud, slag, gravel, and other debris. This debris easily seeps into the gaps between the bolts and between the bolts and the mounting surfaces, causing the following serious problems: 1. Debris intrusion and corrosion: Debris that intrudes will accumulate in the gaps, accelerating the corrosion of bolts and mounting sleeves. Over time, this may cause the bolts to rust and become stuck, making subsequent maintenance and disassembly extremely difficult, and may even require destructive removal.

[0004] 2. Impact damage: Hard objects such as stones thrown at high speed can directly impact the bolt head, causing wear and deformation of the bolt head's edges, and even damaging its surface anti-corrosion coating. This not only affects the bolt's appearance, but more seriously, the damaged bolt head makes it impossible to fit standard tools, causing trouble for disassembly and replacement.

[0005] 3. Changes in preload: Continuous impacts and extrusion by debris may cause slight changes in bolt preload. Over a long period of time, these changes may affect the reliability of the connection structure and pose safety hazards.

[0006] Therefore, the lack of effective protection for longitudinal beam connecting bolts in the existing technology leads to a shortened bolt lifespan, increased maintenance costs, and potential safety risks. Summary of the Invention

[0007] In view of the shortcomings of the existing technology, this utility model provides a protective device for the bolts connecting the longitudinal beam and the frame, which can effectively prevent soil, gravel and other debris from intruding into and impacting the bolt head, extend the bolt life, reduce maintenance difficulty, and has the advantages of simple structure, convenient installation and low cost.

[0008] This utility model is achieved according to the following technical solution: Firstly, this utility model provides a protective device for the bolts connecting the longitudinal beam and the vehicle frame, comprising: The protective cover, composed of multiple protective units connected in a preset order, is used to completely cover the multiple fixing bolts at the connection between the frame and the longitudinal beams at the parts protruding from the frame. Multiple fasteners are configured to secure and release the protective cover from the frame.

[0009] In some embodiments, the plurality of protection units are divided into: Several protective units are used to protect multiple fixing bolts in the transverse area where the frame connects to the longitudinal beam; Multiple protective units are used to protect multiple fixing bolts in the longitudinal area where the frame connects to the longitudinal beam.

[0010] In some embodiments, the protective unit 1 includes a right-angled bent plate and a U-shaped support plate. The bent plate includes a vertical plate and a horizontal top plate. The vertical plate is provided with a plurality of mounting holes for mounting on the vehicle frame with fasteners. The support plate is fixed to the bottom surface of the horizontal top plate, and the opening of the support plate faces the fixing bolts. When the protective unit 1 is assembled on the vehicle frame, a plurality of fixing bolts in the transverse area fall into the receiving cavity formed by the support plate and the horizontal top plate.

[0011] In some embodiments, the two end faces of the support plate are partially or entirely inclined to fit the inclined plate on the frame and located behind the fixing bolts.

[0012] In some embodiments, the second protective unit includes a right-angled bent plate, an outer side plate, and an inner side plate. The bent plate includes a vertical plate and a horizontal top plate. The outer side plate is fixed to one end face along the length direction of the bent plate, and the inner side plate is fixed to the bottom surface of the horizontal top plate parallel to the vertical plate. The vertical plate and the outer side plate are provided with a plurality of mounting holes for mounting on the vehicle frame with fasteners. When the second protective unit is assembled on the vehicle frame, a plurality of fixing bolts in the longitudinal region fall into the receiving cavity formed by the bent plate, the outer side plate, and the inner side plate.

[0013] In some embodiments, the plurality of protective units consist of two protective units one and two protective units two; the two protective units one are connected together to jointly protect the plurality of fixing bolts in the transverse region; one of the protective units two protects the plurality of fixing bolts in the longitudinal region on the front side, and the other protective unit two protects the plurality of fixing bolts in the longitudinal region on the rear side; the two protective units one are respectively connected to the corresponding protective units two.

[0014] In some embodiments, the frame is welded with a threaded seat with internal threads at a location corresponding to the mounting hole provided on the protective cover; the fastener is a bolt, which mates with the coaxial mounting hole and the threaded seat to fasten the protective cover to the frame.

[0015] In some embodiments, a cushioning pad is attached to the inner side of the top plate of the protective cover.

[0016] Secondly, this utility model provides a tracked engineering machinery, including a longitudinal beam, a frame, and a protective device for the bolts connecting the longitudinal beam and the frame.

[0017] In some embodiments, the tracked construction machinery includes a tracked excavator.

[0018] The beneficial effects of this utility model are: 1. Effective physical protection: The protective cover completely isolates the bolt head from the harsh external environment, fundamentally preventing the intrusion and direct impact of debris such as mud and gravel, and significantly extending the service life of the bolt.

[0019] 2. Easy to maintain: When bolts need to be inspected or replaced, the protective cover can be removed by disassembling only a few fasteners, making the operation simple. The bolt heads always remain intact, ensuring the normal use of the tools and greatly reducing maintenance difficulty and time costs.

[0020] 3. Simple structure and low cost: The protective cover has a simple structure and can be mass-produced using processes such as stamping, resulting in low cost. The threaded seat structure welded to the frame is stable and reliable, and the installation method is simple, requiring no large-scale modifications to the existing frame and longitudinal beam structure.

[0021] 4. High versatility: This device can be widely used in similar connection parts of various models of excavators and other tracked engineering machinery (such as tracked cranes, rotary drilling rigs, etc.), and has high promotional value. Attached Figure Description

[0022] The accompanying drawings, as part of this utility model, are used to provide a further understanding of the present utility model. The illustrative embodiments and descriptions of the present utility model are used to explain the present utility model, but do not constitute an undue limitation of the present utility model. Obviously, the drawings described below are merely some embodiments; those skilled in the art can obtain other drawings based on these drawings without any creative effort.

[0023] In the attached diagram: Figure 1 A schematic diagram of bolt installation without a protective cover for an existing structure; Figure 2 This is a schematic diagram of the installation of the present invention with a bolt protection device; Figure 3 This is an exploded view of the protective device of this utility model; Figure 4 This is a schematic diagram of the protective device of this utility model after docking; Figure 5 This is a schematic diagram of the structure of the second front protective unit of this utility model; Figure 6 This is a schematic diagram of the structure of the second rear protective unit of this utility model; Figure 7 This is a schematic diagram of the structure of the first protective unit of this utility model.

[0024] Attached diagram descriptions: 1. Frame; 2. Protective unit two; 3. Protective unit two; 4. Protective unit one; 5. Threaded seat; 6. Bolt; 7. Protective cover; 8. Longitudinal beam; 9. Steel sleeve; 10. Fixing bolt; 2-1. Bending plate; 2-2. Outer side plate; 2-3. Inner side plate; 3-1. Bending plate; 3-2. Outer side plate; 3-3. Inner side plate; 4-1. Bending plate; 4-2. Support plate.

[0025] It should be noted that these accompanying drawings and textual descriptions are not intended to limit the scope of the present invention in any way, but rather to illustrate the concept of the present invention to those skilled in the art by referring to specific embodiments. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate this utility model, but are not intended to limit the scope of this utility model.

[0027] In the description of this utility model, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0028] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0029] like Figure 1As shown, the frame 1 is connected to the longitudinal beam 8 by multiple rows of fixing bolts 10 on the top and sides. However, the lack of effective protection for the fixing bolts 10 (mainly the head, neck and steel sleeve 9 of the bolts) leads to a shortened service life of the fixing bolts 10, increased maintenance costs, and potential safety risks.

[0030] like Figure 2 As shown, the purpose of this utility model is to overcome the shortcomings of the prior art and provide a protective device for the connecting bolts of the longitudinal beam and the frame that is simple in structure, easy to install, and has good protective effect. The device includes a protective cover 7 and multiple fasteners. The protective cover 7 is composed of multiple protective units connected in a preset sequence, used to completely cover the multiple fixing bolts 10 at the connection between the frame 1 and the longitudinal beam 8 at the parts protruding from the frame 1 (mainly the bolt heads, necks, and steel sleeves). The multiple fasteners are configured to fix and release the protective cover 7 from the frame 1. This utility model can effectively prevent soil, gravel, and other debris from intruding into and impacting the bolt heads, extend the life of the fixing bolts, reduce maintenance difficulty, and has the advantages of simple structure, easy installation, and low cost.

[0031] The specific structure of the aforementioned protection units will be further explained below.

[0032] like Figure 3 , Figure 4 As shown, the multiple protective units are divided into several protective units 1 4 and several protective units 2 and 3. The several protective units 1 4 are used to protect the multiple fixing bolts 10 in the transverse area where the frame 1 is connected to the longitudinal beam 8; the multiple protective units 2 and 3 are used to protect the multiple fixing bolts 10 in the longitudinal area where the frame 1 is connected to the longitudinal beam 8.

[0033] like Figure 7 As shown, the protective unit 4 includes a right-angled bent plate 4-1 and a U-shaped support plate 4-2. The bent plate 4-1 includes a vertical plate and a horizontal top plate. The vertical plate has several mounting holes for fasteners to be installed on the frame 1. The support plate 4-2 is fixed to the bottom surface of the horizontal top plate, and the opening of the support plate 4-2 faces the fixing bolts 10. When the protective unit 4 is assembled on the frame 1, several fixing bolts 10 in the transverse area fall into the receiving cavity formed by the support plate 4-2 and the horizontal top plate.

[0034] Further plans will continue to be considered. Figure 7 As shown, the two end faces of the support plate 4-2 are partially or entirely set as inclined surfaces to fit the inclined plate on the frame 1 and located behind the fixing bolt 10.

[0035] like Figure 5 , Figure 6As shown, protective unit 2 includes a right-angled bent plate 2-1, an outer plate 2-2, and an inner plate 2-3, and protective unit 3 includes a right-angled bent plate 3-1, an outer plate 3-2, and an inner plate 3-3. Protective unit 2 and protective unit 3 have the same structure, therefore, the following description will only focus on protective unit 3.

[0036] The bending plate 3-1 includes a vertical plate and a horizontal top plate. The outer plate 3-2 is fixed to one end face of the bending plate 3-1 along its length, and the inner plate 3-3 is fixed to the bottom surface of the horizontal top plate parallel to the vertical plate. The vertical plate and the outer plate 3-2 are provided with several mounting holes for fasteners to be installed on the frame 1. When the protective unit 2 3 is assembled on the frame 1, multiple fixing bolts 10 in the longitudinal region fall into the receiving cavity formed by the bending plate 3-1, the outer plate 3-2, and the inner plate 3-3.

[0037] Preferred solutions, such as Figure 3 , Figure 4 As shown, the multiple protective units consist of two protective units 1 (4) and two protective units 2 and 3 (3). The two protective units 1 (4) are connected together to protect the multiple fixing bolts 10 in the transverse area. The protective unit 2 (3) protects the multiple fixing bolts 10 in the longitudinal area on the front side, and the protective unit 2 (2) protects the multiple fixing bolts 10 in the longitudinal area on the rear side. The two protective units 1 (4) are connected to the corresponding protective units 2 and 3 (2 and 3) respectively.

[0038] It should be noted that the above embodiment shows that the protective cover consists of four protective units. In actual design, it is not limited to four protective units and can also be designed with five or six protective units.

[0039] In a preferred embodiment, a buffer pad (such as a rubber pad) is attached to the inner side of the top plate of the first protective unit 4 and the second protective units 2 and 3. This buffer pad can fit tightly against the bolt head after tightening, effectively absorbing and buffering the impact energy from the outside, and providing additional protection for the bolt head.

[0040] In the preferred embodiment, protective unit 4 and protective units 2 and 3 are made of high-strength, corrosion-resistant metal sheet (Q355D) to ensure that they have sufficient rigidity and weather resistance.

[0041] The following provides a further explanation of the specific structure connecting the aforementioned protective cover to the vehicle frame.

[0042] like Figure 2 , Figure 3 , Figure 4 As shown, the frame 1 has a threaded seat 5 with internal threads welded to the location corresponding to the mounting hole provided on the protective cover 7; the fastener is a bolt 6, which cooperates with the coaxial mounting hole and the threaded seat 5 to fasten the protective cover 7 to the frame 1.

[0043] In summary, this utility model provides a protective device for the bolts connecting the longitudinal beam and the vehicle frame, achieving the following functions and effects: 1. Effective physical protection: The protective cover completely isolates the bolt head from the harsh external environment, fundamentally preventing the intrusion and direct impact of debris such as mud and gravel, and significantly extending the service life of the bolt.

[0044] 2. Easy to maintain: When bolts need to be inspected or replaced, the protective cover can be removed by disassembling only a few fasteners, making the operation simple. The bolt heads always remain intact, ensuring the normal use of the tools and greatly reducing maintenance difficulty and time costs.

[0045] 3. Simple structure and low cost: The protective cover has a simple structure and can be mass-produced using processes such as stamping, resulting in low cost. The threaded seat structure welded to the frame is stable and reliable, and the installation method is simple, requiring no large-scale modifications to the existing frame and longitudinal beam structure.

[0046] 4. High versatility: This device can be widely used in similar connection parts of various models of excavators and other tracked engineering machinery (such as tracked cranes, rotary drilling rigs, etc.), and has high promotional value.

[0047] The tracked construction machinery provided by this utility model is described below. The tracked construction machinery described below and the protective device for the connecting bolts of the longitudinal beam and the frame described above can be referred to in correspondence.

[0048] The present invention provides a tracked engineering machinery that may include a protective device for the bolts connecting the longitudinal beam and the frame as described in any of the above embodiments.

[0049] The beneficial effects achieved by the tracked engineering machinery provided by this utility model are consistent with the beneficial effects achieved by the protective device for the connecting bolts of the longitudinal beam and the frame provided by this utility model, so they will not be repeated here.

[0050] It should be noted that the aforementioned tracked construction machinery can be tracked cranes, tracked excavators, or other tracked construction machinery.

[0051] Numerous specific details are set forth in the specification provided herein. However, it will be understood that embodiments of the present invention may be practiced without these specific details. In some instances, well-known methods, structures, and techniques have not been shown in detail so as not to obscure the understanding of this specification.

[0052] Furthermore, those skilled in the art will understand that although some embodiments described herein include certain features found in other embodiments but not others, combinations of features from different embodiments are also within the scope of protection of this invention and form different embodiments. For example, in the embodiments described above, those skilled in the art can use them in combination based on known technical solutions and the technical problems to be solved by this application.

[0053] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-described technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A protective device for the bolts connecting the longitudinal beam and the vehicle frame, characterized in that, include: The protective cover, composed of multiple protective units connected in a preset order, is used to completely cover the multiple fixing bolts at the connection between the frame and the longitudinal beams at the parts protruding from the frame. Multiple fasteners are configured to secure and release the protective cover from the frame.

2. The protective device for the bolts connecting the longitudinal beam and the vehicle frame according to claim 1, characterized in that, The multiple protection units are divided into: Several protective units are used to protect multiple fixing bolts in the transverse area where the frame connects to the longitudinal beam; Multiple protective units are used to protect multiple fixing bolts in the longitudinal area where the frame and longitudinal beams connect.

3. The protective device for the bolts connecting the longitudinal beam and the vehicle frame according to claim 2, characterized in that: The protective unit includes a right-angled bent plate and a U-shaped support plate. The bent plate includes a vertical plate and a horizontal top plate. The vertical plate has several mounting holes for fasteners to be installed on the vehicle frame. The support plate is fixed to the bottom surface of the horizontal top plate, and the opening of the support plate faces the fixing bolts. When the protective unit is assembled on the vehicle frame, several fixing bolts in the transverse area fall into the receiving cavity formed by the support plate and the horizontal top plate.

4. The protective device for the bolts connecting the longitudinal beam and the vehicle frame according to claim 3, characterized in that: The two end faces of the support plate are partially or entirely inclined to fit the inclined plate on the frame and located behind the fixing bolts.

5. The protective device for the bolts connecting the longitudinal beam and the vehicle frame according to claim 2, characterized in that: The second protective unit includes a right-angled bent plate, an outer side plate, and an inner side plate. The bent plate includes a vertical plate and a horizontal top plate. The outer side plate is fixed to one end face along the length of the bent plate, and the inner side plate is fixed to the bottom surface of the horizontal top plate, parallel to the vertical plate. The vertical plate and the outer side plate are provided with several mounting holes for fasteners to be installed on the vehicle frame. When the second protective unit is assembled on the vehicle frame, multiple fixing bolts in the longitudinal region fall into the receiving cavity formed by the bent plate, the outer side plate, and the inner side plate.

6. The protective device for the bolts connecting the longitudinal beam and the vehicle frame according to claim 2, characterized in that: The plurality of protective units consist of two protective units one and two protective units two; the two protective units one are connected together to jointly protect the plurality of fixing bolts in the transverse region; one of the protective units two protects the plurality of fixing bolts in the longitudinal region on the front side, and the other protective unit two protects the plurality of fixing bolts in the longitudinal region on the rear side; the two protective units one are respectively connected to the corresponding protective units two.

7. The protective device for the bolts connecting the longitudinal beam and the vehicle frame according to claim 1, characterized in that: The frame has a threaded seat with internal threads welded to the location corresponding to the mounting holes on the protective cover; the fastener is a bolt, which mates with the coaxial mounting holes and threaded seat to fasten the protective cover to the frame.

8. The protective device for the bolts connecting the longitudinal beam and the vehicle frame according to claim 1, characterized in that: A cushioning pad is attached to the inner side of the top plate of the protective cover.

9. A tracked engineering machine, comprising a longitudinal beam and a frame, characterized in that: It also includes a protective device for the longitudinal beam and frame connecting bolts as described in any one of claims 1 to 8.

10. A tracked engineering machine according to claim 9, characterized in that: The tracked construction machinery includes tracked excavators.

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