Thrust wheel supporting structure and engineering machinery

Abstract

The utility model relates to the technical field of engineering machinery, and discloses a thrust wheel supporting structure and engineering machinery. A thrust wheel support structure includes: a track frame; the elastic component is connected with the track frame and is used for reducing vibration; the swing frame is provided with a first connecting part, a second connecting part and a third connecting part, the first connecting part is located between the second connecting part and the third connecting part, and the first connecting part is hinged to the elastic component; and the first thrust wheel and the second thrust wheel are respectively arranged on the second connecting part and the third connecting part. Through cooperative cooperation of swinging of the thrust wheel and the swing frame and vibration reduction of the elastic component, the impact load on a bumpy road surface or a muddy road surface can be greatly reduced, the thrust wheel and the crawler belt are better attached to the road surface change, the operation speed is increased, the operation efficiency is greatly improved, meanwhile, the comfort is improved, the impact load and amplitude of parts are reduced, and the reliability is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of engineering machinery, in particular to a track wheel support structure and engineering machinery. Background Art

[0002] A skid steer loader is a compact construction machine suitable for all-terrain, multi-working conditions, and multi-functional operations. Depending on the different walking mechanisms, it is mainly divided into two types: tire-type and crawler-type. Tire-type skid steer loaders have high maneuverability, while crawler-type skid steer loaders have a large ground contact area, low ground contact pressure, and excellent passing performance, giving them unique advantages in construction operations on muddy, slippery, and unpaved roads.

[0003] The chassis structure of a crawler skid loader includes a vehicle frame and a rigid track frame. The rigid track frame is connected to the vehicle frame by welding or bolts, and the track rollers are fixed to the rigid track frame. The rigid track frame has a simple structure and low cost, but has a large impact and poor comfort. At the same time, when working on rugged or muddy working sites, a single track roller is prone to single-point support, which has a large impact on the track frame and the vehicle frame, and affects the cost of the rubber track. Utility Model Content

[0004] In view of this, the utility model provides a track roller support structure and engineering machinery to solve the problem that when a rigid track frame is used to fix the track rollers, a single-point support of a single track roller may easily occur during operations on complex road surfaces, resulting in a large impact on the track frame and the vehicle frame.

[0005] In the first aspect, the utility model provides a track roller support structure, including: a track frame; an elastic component connected to the track frame, the elastic component being used for vibration reduction; a swing frame, having a first connection part, a second connection part and a third connection part, the first connection part being located between the second connection part and the third connection part, the first connection part being hinged on the elastic component; a first track roller and a second track roller, being respectively arranged on the second connection part and the third connection part.

[0006] Beneficial effects: When operating on complex working surfaces such as rough or muddy roads, the first and second rollers can swing around the elastic component through the swing frame, so that the first and second rollers can better adapt to the changes in the rough road surface, improve the contact area and adhesion between the rollers and the road surface, avoid the situation where a certain roller is suspended and not stressed due to the unevenness of the rough road surface while other single rollers are stressed, avoid the situation where the rollers and rubber tracks are stressed at a single point, reduce the force, and improve reliability. When encountering an impact load on the working surface or passing through a rough road surface quickly, the impact load on the first and second rollers is transmitted to the elastic component through the swing frame, and then the elastic deformation of the elastic component absorbs the impact load, thereby achieving vibration reduction, reducing the impact of the roller impact load on the track frame and the vehicle frame, and can also reduce the impact of the rubber track, improve reliability, greatly improve working comfort, and improve working quality. The coordinated operation of the rocking of the track wheels and rocking frames and the vibration reduction of the elastic components can significantly reduce the impact load on rough or muddy roads. The track wheels and tracks can better adapt to changes in the road surface, thereby increasing operating speed and significantly improving operating efficiency. At the same time, it improves comfort, reduces the impact load and amplitude of components, and improves reliability.

[0007] In an optional embodiment, one end of the elastic component is fixedly connected to the crawler frame, and the other end of the elastic component is slidably connected to the crawler frame.

[0008] Beneficial effects: When the supporting wheel is subjected to an impact load on the working surface, the other end of the elastic component is slidably connected relative to the track frame, which can meet the space requirement required for the length change when the elastic component is deformed, thereby achieving vibration reduction, reducing the impact amplitude of the supporting wheel impact load on the track frame and the vehicle frame, greatly improving working comfort, improving working quality, and also reducing the impact of the rubber track and improving its reliability.

[0009] In an optional embodiment, the swing frame includes an integrally formed swing body and two support arms, the two support arms are respectively arranged at both ends of the swing body, the support arms extend along the length direction of the crawler frame, the front ends of the two support arms form a second connecting portion, the rear ends of the two support arms form a third connecting portion, and the first connecting portion is formed on the swing body.

[0010] Beneficial effects: The swing frame is an integral structure with high structural strength, thereby improving overall stability and reliability.

[0011] In an optional embodiment, the number of elastic components is two arranged in parallel, a connecting hole is provided on the swing body, the connecting hole forms a first connecting portion, the two elastic components are connected to the swing body through a connecting shaft, and the connecting shaft is passed through the connecting hole.

[0012] Beneficial effects: The swing frame is connected to the crawler frame through a pair of elastic components formed by two elastic components. The elastic components on both sides of the swing frame are connected to the swing frame to form an integral structure, so that when the supporting wheel is subjected to impact or unilateral load impact, the elastic components can be synchronously compressed by the swing frame as a whole, and the compression amount of the elastic components on both sides of the swing frame is made the same, thereby ensuring that the supporting wheel only performs synchronous vibration reduction movement in the up and down directions within the crawler frame; when the supporting wheel is subjected to an offset load or a unilateral impact load, there will be no different compression amounts of the elastic components, resulting in different vibration reduction compression on the left and right sides of the supporting wheel and unilateral wear or derailment of the wheel edge of the supporting wheel and the crawler.

[0013] In an optional embodiment, the outer circumferences of the first supporting roller and the second supporting roller are both provided with an annular groove, and the swing frame has a boss extending into the annular groove.

[0014] Beneficial effects: On the one hand, the setting of the boss plays a role in strengthening the structural strength of the swing frame. On the other hand, the boss corresponds to the annular groove on the supporting wheel, which can clear the accumulated matter in the annular groove of the supporting wheel.

[0015] In an optional embodiment, the first supporting wheel and the second supporting wheel include an axle and a wheel body rotatably mounted on the axle, the side surface of the end face of the axle has a supporting protrusion protruding outward, the top surface of the supporting protrusion forms a supporting surface, and the second connecting part and the third connecting part have a contact surface that contacts the supporting surface.

[0016] Beneficial effect: The first track wheel and the second track wheel are connected in the two support arms by connecting bolts. When the track wheels are subjected to radial force, the radial force exerted on the track wheels is transmitted to the swing frame through the supporting protrusions on both sides and the bottom of the swing frame. The radial force will not be transmitted to the connecting bolts connecting the track wheels and the swing frame. The connecting bolts only fix the track wheels axially and are not subjected to radial force, thereby improving reliability.

[0017] In an optional embodiment, the crawler frame has a mounting cavity open downward, the elastic component and the swing frame are both located in the mounting cavity, and the first and second track wheels are located in the mounting cavity with their lower parts extending out of the mounting cavity.

[0018] Beneficial effect: The crawler frame is used to protect the outside of the suspension vibration damping component, which can effectively reduce the entry of foreign matter into the suspension vibration damping component, thereby reducing abnormal damage and improving reliability.

[0019] In an optional embodiment, a limit seat is provided in the installation cavity, and the limit seat is used to limit the swing limit position of the swing frame.

[0020] Beneficial Effects: When the track roller swings up and down to a certain range through the second and third connecting parts of the swing frame, it contacts the limit seat in the track frame. The limit seat limits the swing range of the swing frame, thereby limiting the up and down range of the elastic component. At the same time, because the suspension vibration reduction assembly is arranged inside the track frame, it is also convenient to arrange the limit seat inside the track frame, thereby limiting the swing range of the track roller.

[0021] In an optional embodiment, the crawler frame includes a longitudinal beam that is open downward and has a U-shaped cross-section, and several pairs of support plates, the several pairs of support plates are fixed inside the longitudinal beam, the several pairs of support plates are arranged along the extension direction of the longitudinal beam, a pair of support plates are arranged at intervals, and an installation space is formed between the support plates and the corresponding side plates of the longitudinal beam, an elastic component is arranged in the installation space, and a pair of support plates, two side plates of the longitudinal beam and one end of the elastic component are connected by a connecting component.

[0022] Beneficial effect: The connecting component is connected to a pair of support plates and two side plates of the longitudinal beam, so that the connecting component and the crawler frame form a four-point support structure, reducing the deflection and deformation of the connecting component during operation.

[0023] In an optional embodiment, the track frame further includes a plurality of support ribs, which are fixed inside the longitudinal beam and arranged along the extension direction of the longitudinal beam, and the support ribs are connected to the inner top surface and inner side surface of the longitudinal beam, and / or the track frame further includes a plurality of connecting ribs, and connecting ribs are arranged between a pair of support plates; and / or the track frame further includes a plurality of stickers, which are arranged on the outer side surface of the longitudinal beam at the connection position with the connecting component, and the stickers have through holes for the connecting component to pass through; and / or the track frame further includes a front bottom plate and a rear bottom plate, the front bottom plate is connected to the front end of the bottom of the longitudinal beam, and the rear bottom plate is connected to the rear end of the bottom of the longitudinal beam.

[0024] Beneficial Effects: The support ribs enhance the structural strength of the track frame, thereby improving its rigidity and torsional resistance. The connecting ribs connect the pair of support plates, increasing the rigidity and strength of the track frame. The mate plates mate with the ends of the connecting components, enhancing the stability and load-bearing capacity of the connection. The front and rear bottom plates connect to the bottoms of the two side plates of the longitudinal beam. Together, the support ribs, front and rear bottom plates form a closed frame structure, enhancing its rigidity and torsional resistance.

[0025] In a second aspect, the present invention further provides an engineering machine, comprising: a vehicle frame; and the above-mentioned track wheel support structure, which is arranged on the vehicle frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0027] Figure 1 This is a three-dimensional diagram of a track roller support structure according to an embodiment of the present utility model;

[0028] Figure 2 for Figure 1 A partially cutaway schematic diagram of the track roller support structure shown;

[0029] Figure 3 for Figure 1 A perspective view of the suspension damping assembly and supporting rollers shown;

[0030] Figure 4 for Figure 3 A schematic cross-sectional view of the suspension damping assembly and the supporting rollers shown;

[0031] Figure 5 for Figure 4 A partial enlarged schematic diagram;

[0032] Figure 6 for Figure 3 A perspective view of the swing frame shown;

[0033] Figure 7 for Figure 3 A perspective view of the elastic member shown;

[0034] Figure 8 for Figure 1 A perspective view of the track frame shown in a first perspective;

[0035] Figure 9 for Figure 8 A perspective view of the track frame shown in a second perspective;

[0036] Figure 10 for Figure 8 A perspective view of the track frame is shown from a third perspective.

[0037] Description of reference numerals:

[0038] 1. Track frame; 101. Longitudinal beam; 1011. First U-shaped plate; 1012. Second U-shaped plate; 1013. Avoidance opening; 102. Support plate; 103. Support rib plate; 1031. First rib plate; 1032. Second rib plate; 104. Connecting rib plate; 105. Adhesive plate; 106. Front bottom plate; 107. Rear bottom plate; 108. Limit seat;

[0039] 2. Elastic component; 201. Leaf spring; 202. Connecting seat; 203. Fixing bolt; 204. Rivet;

[0040] 3. Swing frame; 301. Swing body; 3011. First connection portion; 302. Support arm; 3021. Accommodation groove; 303. Boss; 3023. Second connection portion; 3024. Third connection portion;

[0041] 4. First roller; 401. Annular groove; 402. Supporting protrusion;

[0042] 5. Second heavy wheel;

[0043] 6. Connecting parts;

[0044] 701, connecting shaft; 702, first shaft sleeve; 703, second shaft sleeve;

[0045] 8. Connecting bolts. DETAILED DESCRIPTION

[0046] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative efforts shall fall within the scope of protection of the present invention.

[0047] The following combination Figures 1 to 10 , describing the embodiments of the present utility model.

[0048] According to an embodiment of the present invention, on the one hand, a supporting roller support structure is provided, including: a track frame 1, an elastic component 2, a swing frame 3, a first supporting roller 4 and a second supporting roller 5; the elastic component 2 is connected to the track frame 1, and the elastic component 2 is used for vibration reduction; the swing frame 3 has a first connecting part 3011, a second connecting part 3023 and a third connecting part 3024, the first connecting part 3011 is located between the second connecting part 3023 and the third connecting part 3024, and the first connecting part 3011 is hinged on the elastic component 2; the first supporting roller 4 and the second supporting roller 5 are respectively arranged on the second connecting part 3023 and the third connecting part 3024.

[0049] With the supporting roller support structure of this embodiment, when operating on complex working surfaces such as rough or muddy roads, the first and second rollers 4 and 5 can swing around the elastic component 2 via the swing frame 3, thereby allowing the first and second rollers 4 and 5 to better adapt to the changes in the rough road surface, improving the contact area and adhesion between the rollers and the road surface, and avoiding the situation where one roller is suspended and unloaded due to the unevenness of the rough road surface while other individual rollers are loaded. This avoids the situation where the supporting rollers and rubber tracks are subjected to single-point force, reduces the force applied, and improves reliability. Furthermore, when the working surface encounters an impact load or when the vehicle quickly passes over a rough road surface, the impact load on the first and second rollers 4 and 5 is transmitted to the elastic component 2 via the swing frame 3. The elastic deformation of the elastic component 2 absorbs the impact load, thereby achieving vibration reduction, reducing the impact of the supporting roller impact load on the track frame 1 and the vehicle frame, and reducing the impact of the rubber track, thereby improving reliability, significantly improving working comfort, and enhancing working quality. Through the coordinated cooperation of the swing of the supporting wheels and the swing frame 3 and the vibration reduction of the elastic component 2, the impact load on rough or muddy roads can be greatly reduced, the supporting wheels and tracks can better adapt to the changes in the road surface, the operating speed can be increased, the operating efficiency can be greatly improved, and at the same time, the comfort can be improved, the impact load and amplitude of the components can be reduced, and the reliability can be improved.

[0050] Furthermore, the first connection portion 3011 , the second connection portion 3023 and the third connection portion 3024 are arranged in a triangle, which facilitates the connection between the swing frame 3 and the elastic component 2 and the supporting wheel, and can also improve the structural strength and reliability of the swing frame 3 .

[0051] In one embodiment, one end of the elastic component 2 is fixedly connected to the track frame 1, and the other end of the elastic component 2 is slidably connected to the track frame 1. When the supporting roller is subjected to an impact load on the working surface, the other end of the elastic component 2 is slidably connected relative to the track frame 1. This can meet the space requirements required for the length change of the elastic component when it deforms, thereby achieving vibration reduction and reducing the impact amplitude of the supporting roller impact load on the track frame 1 and the vehicle frame, significantly improving working comfort and quality, and also reducing the impact of the rubber track and improving its reliability.

[0052] Furthermore, if Figures 1 to 3 As shown, one end of the elastic component 2 is connected to the crawler frame 1 through a connecting component 6, and the other end of the elastic component 2 is also connected to the crawler frame 1 through a connecting component 6. The crawler frame 1 is provided with a long hole for the connecting component 6 to pass through. The space requirement required for the length change of the elastic component 2 when it is deformed is achieved by sliding the connecting component 6 in the long hole.

[0053] Specifically, one end and the other end of the elastic component 2 each have a through-hole for the connecting component 6 to pass through. The portion of the track frame 1 connected to one end of the elastic component 2 also has a through-hole for the first connecting portion 3011 to pass through. The connecting component 6 is a pin. One end of the elastic component 2 is hingedly fixed to the through-hole of the track frame 1 via the pin, while the other end of the elastic component 2 is slidably fixed within the elongated hole in the track frame 1 via the pin. The elastic component 2 and the track frame 1 are connected by two pins, making the connection simple. The elongated hole is a waist-shaped hole. It is understood that the elongated hole can also be a rectangular hole, etc.

[0054] In one embodiment, Figure 7 As shown, the elastic component 2 includes a leaf spring 201 and a connecting seat 202. The leaf spring 201 is connected to the track frame 1 at both ends. The connecting seat 202 is fixed to the portion between the two ends of the leaf spring 201 and is hingedly connected to the first connecting portion 3011. The leaf spring 201 has advantages such as high load-bearing capacity, simplicity, durability, and excellent stability, making it suitable for various roads. The elastic component 2 is hingedly connected to the track frame 1 via the connecting seat 202, making it easier to connect and reducing assembly difficulty.

[0055] It should be noted that other elastic members may also be used to replace the leaf spring 201 .

[0056] Furthermore, the leaf spring 201 includes at least two leaf springs, the uppermost leaf spring having a coiled lug with a through hole formed therein for the pin to pass through. The at least two leaf springs and the connecting seat 202 are connected by rivets 204 and fixing bolts 203 .

[0057] In one embodiment, the swing frame 3 includes an integrally formed swing body 301 and two arms 302. The two arms 302 are disposed at either end of the swing body 301. The arms 302 extend longitudinally, with the front ends of the two arms 302 forming second connecting portions 3023, and the rear ends of the two arms 302 forming third connecting portions 3024. The first connecting portion 3011 is formed on the swing body 301. The swing frame 3 is a monolithic structure with high structural strength, thereby improving overall stability and reliability.

[0058] It should be noted that the directions of front, back, left and right are Figure 1 The arrows in the middle indicate the directions of "front, back, left, and right".

[0059] In one embodiment, two elastic components 2 are arranged in parallel. A connecting hole is provided on the swing body 301, forming a first connecting portion 3011. The two elastic components 2 are connected to the swing body 301 via a connecting shaft 701, which is passed through the connecting hole. The left and right sides of the swing frame 3 are connected to the track frame 1 via elastic components 2. In other words, the swing frame 3 is connected to the track frame 1 via a pair of elastic components 2 formed by the two elastic components 2. The elastic components 2 on both sides of the swing frame 3 are connected to the swing frame 3 to form an integral structure. This ensures that when the supporting roller is subjected to an impact or a unilateral load, the elastic components 2 are synchronously compressed by the swing frame 3 as a whole, thereby ensuring that the elastic components 2 on both sides of the swing frame 3 are compressed to the same extent, thereby ensuring that the supporting roller only synchronously moves in the vertical direction within the track frame 1 to reduce vibration. When the supporting roller is subjected to an eccentric load or a unilateral impact load, the elastic components 2 will not be compressed differently, resulting in different vibration reduction compression on the left and right sides of the supporting roller, or causing unilateral wear or derailment of the wheel edge and the track.

[0060] It can be understood that in other embodiments, the swing frame 3 is connected to the crawler frame 1 through an elastic component 2. In this case, the elastic component 2 is located in the middle of the swing body 301.

[0061] Furthermore, if Figure 4 As shown, the first connecting portion 3011 is a connecting hole with grooves on the inner walls at both ends. A connecting shaft 701 is disposed within the connecting hole, and a first shaft sleeve 702 is disposed within the groove. The connecting base 202 also has a connecting hole, which is provided with a second shaft sleeve 703. The end of the connecting shaft 701 is located within the second shaft sleeve 703. The first and second shaft sleeves 702 and 703 are coaxially arranged. The first and second shaft sleeves 702 and 703 are lubrication-free structures, requiring no routine maintenance. The swing frame 3 is connected to the connecting base 202 and the second shaft sleeve 703 therein via the connecting shaft 701, allowing the first and second rollers 4 and 5 to swing around the connecting base 202 via the swing frame 3 and the connecting shaft 701.

[0062] Specifically, the swing body 301 and the connecting shaft 701 are secured together by fasteners. These fasteners limit the axial and rotational position of the connecting shaft 701, preventing it from rotating relative to the swing frame 3. The swing body 301 is provided with a threaded hole that communicates with the connecting hole, through which the fasteners, such as screws, secure the connecting shaft 701.

[0063] Furthermore, the support arm 302 has a receiving groove 3021 at the position corresponding to the first connecting portion 3011, and the connecting seat 202 has a downwardly protruding connecting protrusion, which is located in the receiving groove 3021. The receiving groove 3021 and the connecting protrusion cooperate to ensure that the swing frame 3 can swing relative to the connecting seat 202.

[0064] In one embodiment, Figure 4 and Figure 6 As shown, both the first and second rollers 4 and 5 have annular grooves 401, and the swing frame 3 has bosses 303 that extend into the annular grooves 401. The bosses 303 not only strengthen the structural strength of the swing frame 3, but also correspond to the annular grooves 401 on the rollers, allowing for the removal of accumulated debris from the grooves 401. Specifically, the bosses 303 are formed on the swing body 301.

[0065] In one embodiment, Figure 4 and Figure 6 As shown, the first and second rollers 4 and 5 include axles and wheel bodies rotatably mounted on the axles. The end faces of the axles have outwardly protruding support protrusions 402, the top surfaces of the support protrusions 402 forming a support surface, and the second connecting portions 3023 and the third connecting portions 3024 have contact surfaces that contact the support surface. The axles of the first and second rollers 4 and 5 are connected within the two support arms 302 via connecting bolts 8. When the rollers are subjected to radial forces, the radial forces acting on the rollers are transmitted to the swing frame 3 via the supporting protrusions 402 on both sides and the bottom of the swing frame 3. The radial forces are not transmitted to the connecting bolts 8 connecting the rollers to the swing frame 3. The connecting bolts 8 only secure the rollers axially and are not subjected to radial forces, thereby improving reliability.

[0066] Furthermore, the second connection portion 3023 and the third connection portion 3024 are both connection holes for the connection bolts 8 to pass through.

[0067] It is worth noting that the number of the swing frames 3 is at least two, and each swing frame 3 and its two elastic components 2, two supporting wheels, connecting shaft 701, first shaft sleeve 702, second shaft sleeve 703, fasteners, etc. form a suspension vibration damping assembly. The number of the suspension vibration damping assemblies is at least two, and at least two suspension vibration damping assemblies are arranged in the front and rear directions. The front and rear ends of the suspension vibration damping assembly are both hingedly connected to the crawler frame 1 through a pin shaft.

[0068] In one embodiment, Figure 1 、 Figure 2 and Figures 8 to 10 As shown, the track frame 1 has a downwardly open mounting cavity, in which the elastic member 2 and the swing frame 3 are located. The first and second track rollers 4 and 5 are also located within the mounting cavity, with their lower portions extending outward. The suspension and vibration damping assembly is positioned within the track frame 1, providing external protection for the suspension and vibration damping assembly. This effectively reduces the ingress of foreign matter into the suspension and vibration damping assembly, thereby reducing abnormal damage and improving reliability.

[0069] It should be noted that the suspension and vibration damping assembly is housed within the track frame 1. Even if the fasteners fail and cannot effectively restrict the axial and rotational movement of the connecting shaft 701, the side plates of the track frame 1 will still restrict the axial movement of the connecting shaft 701, preventing the connecting shaft 701 from axially moving out and causing separation of the swing frame 3 from the elastic component 2, thereby improving safety redundancy. Furthermore, because a lubrication-free first bushing 702 is provided between the swing frame 3 and the connecting shaft 701, even if the fasteners fail, the connecting shaft 701 and the swing frame 3 can rotate relative to each other through the first bushing 702 without causing direct contact and rotational wear between the connecting shaft 701 and the swing frame 3, thereby improving the reliability and lifespan of the connecting shaft 701 and the swing frame 3.

[0070] In one embodiment, Figure 9 As shown, a limit seat 108 is provided within the mounting cavity. This limit seat 108 is used to limit the swing limit of the swing frame 3. When the supporting rollers swing up and down to a certain range via the second connecting portion 3023 and the third connecting portion 3024 of the swing frame 3, they contact the limit seat 108 within the track frame 1. This limit seat 108 limits the swing limit of the swing frame 3, thereby limiting the vertical movement of the elastic component 2. Furthermore, since the suspension and vibration damping assembly is disposed within the track frame 1, it is also convenient to install the limit seat 108 within the track frame 1, thereby limiting the swing range of the supporting rollers.

[0071] In one embodiment, Figures 8 to 10 As shown, the crawler frame 1 includes a longitudinal beam 101 with a downward opening and a U-shaped cross-section, and several pairs of support plates 102. The pairs of support plates 102 are fixed within the longitudinal beam 101 and arranged along the extension direction of the longitudinal beam 101. A pair of support plates 102 is spaced apart, forming an installation space between the support plates 102 and the corresponding side plates of the longitudinal beam 101. An elastic member 2 is disposed within the installation space. The pair of support plates 102, the two side plates of the longitudinal beam 101, and one end of the elastic member 2 are connected by a connecting member 6. The connecting member 6 is connected to the pair of support plates 102 and the two side plates of the longitudinal beam 101, forming a four-point support structure between the connecting member 6 and the crawler frame 1, reducing deflection of the connecting member 6 during operation. The provision of the support plates 102 improves the rigidity and strength of the crawler frame 1.

[0072] Furthermore, the two side plates of the longitudinal beam 101 have avoidance openings 1013 for avoiding the connecting bolts 8 . The arrangement of the avoidance openings 1013 can avoid interference between the connecting bolts 8 and the longitudinal beam 101 .

[0073] Specifically, the elastic component 2 is located between the support plate 102 and the corresponding side plate of the crawler frame 1, and the longitudinal beam 101 includes a first U-shaped plate 1011 and a second U-shaped plate 1012. The length of the first U-shaped plate 1011 is shorter than the length of the second U-shaped plate 1012, and the front end of the second U-shaped plate 1012 is overlapped on the rear end of the first U-shaped plate 1011.

[0074] In one embodiment, the track frame 1 further includes a plurality of support ribs 103, which are fixed inside the longitudinal beam 101 and arranged along the extension direction of the longitudinal beam 101. The support ribs 103 are connected to the inner top surface and inner side surface of the longitudinal beam 101. The support ribs 103 can enhance the structural strength of the track frame 1, thereby improving the rigidity and torsion resistance of the track frame 1.

[0075] Furthermore, a number of supporting ribs 103 form a number of first ribs 1031 and a number of second ribs 1032. The first ribs 1031 and the second ribs 1032 are arranged alternately. The second ribs 1032 are generally triangular. The only difference between the first ribs 1031 and the second ribs 1032 is that the two sides of the transverse plate section of the first rib 1031 extend downward to form an extended plate section. The transverse plate section and the two extended plate sections form an arch structure.

[0076] In one embodiment, the crawler frame 1 further includes a plurality of connecting ribs 104 . The connecting ribs 104 are disposed between a pair of support plates 102 . The connecting ribs 104 connect the pair of support plates 102 , thereby improving the rigidity and strength of the crawler frame 1 .

[0077] Furthermore, when there are two suspension damping assemblies, four pairs of support plates 102 are provided in the longitudinal beam 101, and each suspension damping assembly is supported on two pairs of support plates 102. It is understood that the number of suspension damping assemblies is not limited to this, and the number of pairs of support plates 102 is determined according to the number of suspension damping assemblies.

[0078] In one embodiment, the crawler frame 1 further includes a plurality of plates 105, which are disposed on the outer surface of the longitudinal beam 101 at the connection portion with the connecting member 6. The plates 105 have through holes for the connecting member 6 to pass through. The plates 105 cooperate with the ends of the connecting member 6 to improve the stability and load-bearing capacity of the connection.

[0079] Furthermore, the through holes on the mounting plate 105 corresponding to the elongated holes are also elongated holes, and the through holes on the mounting plate 105 corresponding to the through holes are round holes.

[0080] Furthermore, through holes are provided on the first U-shaped plate 1011, the second U-shaped plate 1012, and the two pairs of support plates 102, and long holes are provided on the second U-shaped plate 1012 and the two pairs of support plates 102. One end of the elastic component 2 on both sides of the swing frame 3 is placed in the installation space formed between the second U-shaped plate 1012 and the corresponding support plate 102, and is hingedly fixed to the through hole of the crawler frame 1 by a pin; the other end of the elastic component 2 is placed in the installation space formed between the first U-shaped plate 1011 and the corresponding support plate 102, and is slidingly fixed to the long hole of the crawler frame 1 by a pin.

[0081] In one embodiment, the track frame 1 further includes a front bottom plate 106 and a rear bottom plate 107. The front bottom plate 106 is connected to the front end of the bottom of the longitudinal beam 101, and the rear bottom plate 107 is connected to the rear end of the bottom of the longitudinal beam 101. The front bottom plate 106 and the rear bottom plate 107 are connected to the bottoms of the two side plates of the longitudinal beam 101. The support ribs 103, the front bottom plate 106, and the rear bottom plate 107 form a frame-type closed structure of the track frame 1, thereby improving the rigidity and torsional resistance of the track frame 1.

[0082] It should be noted that the pin shaft passes through the two side plates of the crawler frame 1 as a whole. On the one hand, it ensures the coaxiality of the elastic components 2 on both sides of the swing frame 3, avoiding the offset of the supporting wheels and the unbalanced load between the supporting wheels and the crawler track due to installation deviation and eccentric assembly of the elastic components 2 on both sides; on the other hand, the pin shaft is a coaxial through-type structure, which is convenient for assembly and maintenance, and can be assembled, repaired and replaced from the outside of the crawler frame 1.

[0083] According to an embodiment of the present invention, on the other hand, there is provided an engineering machine, comprising: a vehicle frame and the above-mentioned track roller support structure, wherein the track roller support structure is arranged on the vehicle frame.

[0084] Specifically, a suspension vibration reduction assembly is provided between the supporting wheels and the track frame 1 to realize a suspension vibration reduction connection between the supporting wheels and the track frame 1, and then through the rigid connection between the track frame 1 and the vehicle frame, the paired supporting wheels can swing around the connecting seat 202 of the elastic component 2 through the swing frame 3; when encountering an impact load or a bump, the leaf spring 201 of the elastic component 2 is deformed, and then the pair of supporting wheels are driven to move up and down for vibration reduction through the swing frame 3, thereby further realizing the suspension vibration reduction and swing connection between the supporting wheels and the entire machine frame, making the entire machine more suitable for operations on complex roads such as rugged or muddy roads, while improving the driver's operating comfort performance, being more adaptable to higher machine speeds, and improving operating efficiency. It is suitable for vibration reduction of triangular rubber crawler track chassis of small earth-moving and transportation machinery.

[0085] It should be noted that the first supporting roller 4 and the second supporting roller 5 connected to the swing frame 3 form a pair of supporting rollers.

[0086] Furthermore, the engineering machinery includes but is not limited to loaders, excavators, cranes, pile drivers, mixers, etc.

[0087] Although the embodiments of the present invention have been described with reference to the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations shall fall within the scope defined by the appended claims.

Claims

1. A track roller support structure, characterized in that: include: Track frame (1); An elastic component (2) is connected to the crawler frame (1), and the elastic component (2) is used for vibration reduction; A swing frame (3) having a first connecting portion (3011), a second connecting portion (3023) and a third connecting portion (3024), wherein the first connecting portion (3011) is located between the second connecting portion (3023) and the third connecting portion (3024), and the first connecting portion (3011) is hinged to the elastic component (2); The first supporting roller (4) and the second supporting roller (5) are respectively arranged on the second connecting portion (3023) and the third connecting portion (3024).

2. The track roller support structure according to claim 1, characterized in that: One end of the elastic component (2) is fixedly connected to the crawler frame (1), and the other end of the elastic component (2) is slidably connected to the crawler frame (1).

3. The track roller support structure according to claim 1 or 2, characterized in that: The swing frame (3) comprises an integrally formed swing body (301) and two supporting arms (302), wherein the two supporting arms (302) are respectively arranged at both ends of the swing body (301), and the supporting arms (302) extend along the length direction of the crawler frame (1). The front ends of the two supporting arms (302) form the second connecting portion (3023), and the rear ends of the two supporting arms (302) form the third connecting portion (3024), and the first connecting portion (3011) is formed on the swing body (301).

4. The track roller support structure according to claim 3, characterized in that: The number of the elastic components (2) is two and they are arranged in parallel. A connecting hole is provided on the swinging body (301), and the connecting hole forms the first connecting portion (3011). The two elastic components (2) are connected to the swinging body (301) via a connecting shaft (701), and the connecting shaft (701) is passed through the connecting hole.

5. The track roller support structure according to claim 1 or 2, characterized in that: The outer circumferential surfaces of the first supporting roller (4) and the second supporting roller (5) are both provided with an annular groove (401), and the swing frame (3) has a boss (303) extending into the annular groove (401).

6. The track roller support structure according to claim 1 or 2, characterized in that: The first supporting roller (4) and the second supporting roller (5) comprise a wheel axle and a wheel body rotatably sleeved on the wheel axle; the end surface of the wheel axle comprises a supporting protrusion (402) protruding outward; the top surface of the supporting protrusion (402) forms a supporting surface; and the second connecting portion (3023) and the third connecting portion (3024) comprise a contact surface in contact with the supporting surface.

7. The track roller support structure according to claim 1 or 2, characterized in that: The crawler frame (1) has a mounting cavity opening downward, the elastic component (2) and the swing frame (3) are both located in the mounting cavity, and the first supporting roller (4) and the second supporting roller (5) are located in the mounting cavity and their lower parts extend out of the mounting cavity.

8. The track roller support structure according to claim 7, characterized in that: A limit seat (108) is provided in the installation cavity, and the limit seat (108) is used to limit the swing limit position of the swing frame (3).

9. The track roller support structure according to claim 7, characterized in that: The crawler frame (1) comprises a longitudinal beam (101) which is open downward and has a U-shaped cross-section, and a plurality of pairs of support plates (102). The plurality of pairs of support plates (102) are fixed inside the longitudinal beam (101). The plurality of pairs of support plates (102) are arranged along the extension direction of the longitudinal beam (101). A pair of support plates (102) are arranged at intervals. An installation space is formed between the support plates (102) and the corresponding side plates of the longitudinal beam (101). The elastic component (2) is arranged in the installation space. The pair of support plates (102), the two side plates of the longitudinal beam (101), and one end of the elastic component (2) are connected via a connecting component (6).

10. The track roller support structure according to claim 9, characterized in that: The crawler frame (1) further comprises a plurality of supporting ribs (103), wherein the plurality of supporting ribs (103) are fixed inside the longitudinal beam (101) and arranged along the extension direction of the longitudinal beam (101), and the supporting ribs (103) are connected to the inner top surface and the inner side surface of the longitudinal beam (101). And / or, the crawler frame (1) further comprises a plurality of connecting ribs (104), wherein the connecting ribs (104) are arranged between a pair of the support plates (102); And / or, the crawler frame (1) further comprises a plurality of plates (105), the plates (105) being arranged on the outer surface of the longitudinal beam (101) at the connection position with the connecting component (6), the plates (105) having through holes for the connecting component (6) to pass through; And / or, the crawler frame (1) further comprises a front bottom plate (106) and a rear bottom plate (107), wherein the front bottom plate (106) is connected to the front end of the bottom of the longitudinal beam (101), and the rear bottom plate (107) is connected to the rear end of the bottom of the longitudinal beam (101).

11. An engineering machine, characterized in that: include: Frame; The track wheel support structure according to any one of claims 1 to 10 is provided on the vehicle frame.

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