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. The thrust wheel supporting structure comprises a track frame, a pair of thrust wheels and a suspension damping assembly, the suspension damping assembly comprises an elastic assembly, one end of the elastic assembly is hinged to the track frame, and the elastic assembly is used for damping; the connecting frame is provided with a first hinge part, a second hinge part and a third hinge part, the first hinge part is hinged to the other end of the elastic assembly, and the second hinge part is hinged to the track frame; and the swing frame is provided with a first connecting part and a pair of second connecting parts, the first connecting part is located between the pair of second connecting parts, the first connecting part is hinged to the third hinge part, and the pair of second connecting parts is correspondingly connected with the pair of thrust wheels. Through cooperative cooperation of swinging of the thrust wheel and the swing frame and vibration reduction of the elastic assembly, the impact load on a bumpy road surface or a muddy road surface is greatly reduced, the thrust wheel and the crawler belt better fit the road surface change, the operation speed is increased, and the operation efficiency is greatly 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 supporting wheel support structure, including: a track frame, a pair of supporting wheels and a suspension vibration damping assembly, the suspension vibration damping assembly includes: an elastic assembly, one end of which is hinged to the track frame, and the elastic assembly is used for vibration reduction; a connecting frame, having a first hinge part, a second hinge part and a third hinge part, the first hinge part is hinged to the other end of the elastic assembly, and the second hinge part is hinged to the track frame; a swing frame, having a first connecting part and a pair of second connecting parts, the first connecting part is located between the pair of second connecting parts, the first connecting part is hinged to the third hinge part, and the pair of second connecting parts are correspondingly connected to the pair of supporting wheels.

[0006] Beneficial effects: When operating on complex working surfaces such as rough or muddy roads, a pair of supporting rollers can swing around the connecting frame through the swing frame, so that the pair of supporting rollers can better adapt to the changes in the rough road surface, increase the contact area and adhesion between the supporting rollers and the road surface, avoid the situation where one supporting roller is suspended and not stressed due to the unevenness of the rough road surface while other single supporting rollers are stressed, avoid the situation where the supporting rollers and rubber tracks are stressed at a single point, reduce the magnitude of the stress, improve reliability, and avoid unilateral wear or derailment of the wheel edge and track of the supporting roller. When the working surface encounters an impact load or passes through a rough road surface quickly, the impact load on the pair of supporting rollers is transmitted to the elastic component through the swing frame and the connecting frame, and then the elastic deformation of the elastic component absorbs the impact load, thereby achieving vibration reduction, reducing the impact of the supporting roller impact load on the track frame and the frame, and reducing impact stress; it can reduce the impact of the rubber track and improve reliability; reduce the impact amplitude of the track frame and the frame, and improve comfort during operation. The coordinated operation of the track rollers, the swinging of the swing frame and the vibration reduction of the elastic components can significantly reduce the impact load on rough or muddy roads. The track rollers and tracks can better adapt to changes in the road surface, thereby increasing the operating speed and significantly improving the 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, the elastic component includes a sliding shaft, a connecting outer tube and an elastic member, the first end of the sliding shaft extends from the first end of the connecting outer tube into the connecting outer tube, the sliding shaft can slide relative to the connecting outer tube, the second end of the sliding shaft and one of the second ends of the connecting outer tube are hinged to the track frame, the other of the second end of the sliding shaft and the second end of the connecting outer tube is connected to the first hinge part, and the elastic member is sleeved on the sliding shaft and one end is matched with the first end of the connecting outer tube.

[0008] Beneficial effects: When subjected to external impact loads, the sliding shaft slides back and forth relative to the connecting outer cylinder, thereby compressing the elastic part, and absorbing the impact load through the elastic deformation of the elastic part, thereby achieving vibration reduction. The elastic component has the advantages of being simple, strong, and stable, and is suitable for various roads. The structure of the elastic component is simple, easy to implement, and reduces costs.

[0009] In an optional embodiment, a guide elongated hole is provided on the connecting outer cylinder, which passes through the inner and outer walls thereof. The guide elongated hole extends along the sliding direction of the sliding shaft. A guide member is provided on the first end of the sliding shaft. The guide member is located in the guide elongated hole and can slide in the guide elongated hole.

[0010] Beneficial effect: The cooperation between the guide strip hole and the guide piece not only guides the sliding of the sliding shaft, but also prevents the sliding shaft from rotating or falling out of the connecting outer cylinder due to external reasons, thereby ensuring a safe and reliable structure.

[0011] In an optional embodiment, an inner ring groove is provided on the inner wall connected to the outer cylinder, an elastic support sleeve is provided in the inner ring groove, and the elastic support sleeve is sleeved on the sliding shaft.

[0012] Beneficial effect: By supporting the sliding shaft with the elastic support sleeve, hard contact between the sliding shaft and the connecting outer cylinder can be reduced, rapid wear caused by direct wear is avoided, and the service life of the connecting outer cylinder and the sliding shaft is extended.

[0013] In an optional embodiment, a rotation-stopping structure is provided between the elastic component and the connecting frame to prevent relative rotation between the connecting frame and the elastic component.

[0014] Beneficial effect: The anti-rotation structure plays a role of limiting, preventing the elastic component and the connecting frame from rotating relative to each other.

[0015] In an optional embodiment, the anti-rotation structure includes an anti-rotation protrusion and an anti-rotation groove, the anti-rotation protrusion is arranged on one of the elastic component and the connecting frame, and the anti-rotation groove is arranged on the other of the elastic component and the connecting frame.

[0016] Beneficial effects: The anti-rotation structure has a simple structure and is easy to process and manufacture.

[0017] In an optional embodiment, the number of elastic components is two arranged in parallel, the connecting frame includes two connecting arms arranged opposite to each other, each connecting arm has a first hinge part, a second hinge part and a third hinge part, and the other ends of the two elastic components are hinged to the first hinge parts of the two connecting arms one by one.

[0018] Beneficial effect: When subjected to external force, the suspension vibration reduction assembly swings as a whole through the two elastic components and two connecting arms, ensuring that the left and right sides are subjected to force synchronously and avoiding unbalanced loading.

[0019] In an optional embodiment, the connecting frame further includes a connecting member connecting the two connecting arms.

[0020] Beneficial effect: The two connecting arms are reinforced by the connecting piece, thereby improving the overall structural strength.

[0021] 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 and rear ends of the two support arms form a second connecting portion, and the first connecting portion is formed on the swing body.

[0022] Beneficial effects: The swing frame is an integral structure with high structural strength, thereby improving overall stability and reliability.

[0023] 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

[0024] 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.

[0025] Figure 1 This is a three-dimensional diagram of a track roller support structure according to an embodiment of the present utility model;

[0026] Figure 2 for Figure 1 A partially cutaway schematic diagram of the track roller support structure shown;

[0027] Figure 3 for Figure 1 A perspective view of the suspension damping assembly and supporting rollers shown;

[0028] Figure 4 for Figure 3 A schematic cross-sectional view of the suspension damping assembly and the supporting rollers shown;

[0029] Figure 5 for Figure 4 A partial enlarged schematic diagram;

[0030] Figure 6 for Figure 3 A perspective view of the swing frame shown;

[0031] Figure 7 for Figure 3 A perspective view of the elastic assembly shown;

[0032] Figure 8 for Figure 7 A perspective view of the elastic component shown from another angle;

[0033] Figure 9 for Figure 7 a cross-sectional view of the elastic assembly shown;

[0034] Figure 10 for Figure 3 A perspective view of the connecting frame shown;

[0035] Figure 11 for Figure 10 A three-dimensional view of the connecting frame from another angle

[0036] Figure 12 for Figure 1 A perspective view of the track frame shown in a first perspective;

[0037] Figure 13 for Figure 12 A perspective view of the track frame shown in a second perspective;

[0038] Figure 14 for Figure 12 A perspective view of the track frame is shown from a third perspective.

[0039] Description of reference numerals:

[0040] 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;

[0041] 2. Elastic assembly; 201. Sliding shaft; 202. Connecting outer cylinder; 2021. Guide elongated hole; 2022. Inner ring groove; 2023. Anti-rotation groove; 203. Elastic member; 204. Guide member; 205. Elastic support sleeve; 206. Third shaft sleeve; 207. Connecting pin; 208. Fastening nut; 209. Washer;

[0042] 3. Swing frame; 301. Swing body; 3011. First connecting portion; 302. Support arm; 3021. Accommodating groove; 303. Boss; 3023. Second connecting portion;

[0043] 4. Track roller; 401. Annular groove; 402. Supporting protrusion;

[0044] 5. Connecting frame; 501. Connecting arm; 5011. First hinge; 5012. Second hinge; 5013. Third hinge; 5014. Anti-rotation protrusion; 502. Connecting member; 503. Fourth shaft sleeve; 504. Fifth shaft sleeve;

[0045] 6. Connecting parts;

[0046] 701, connecting shaft; 702, first shaft sleeve; 703, second shaft sleeve; 704, fastening screw;

[0047] 8. Connecting bolts;

[0048] 9. Limit sleeve. DETAILED DESCRIPTION

[0049] 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.

[0050] The following combination Figures 1 to 14 , describing the embodiments of the present utility model.

[0051] According to an embodiment of the present utility model, on the one hand, a supporting roller support structure is provided, including: a crawler frame 1, a pair of supporting rollers 4 and a suspension vibration reduction assembly, the suspension vibration reduction assembly including: an elastic assembly 2, a connecting frame 5, a swing frame 3 and a pair of supporting rollers 4, one end of the elastic assembly 2 is hinged to the crawler frame 1, and the elastic assembly 2 is used for vibration reduction; the connecting frame 5 has a first hinge part 5011, a second hinge part 5012 and a third hinge part 5013, the first hinge part 5011 is hinged to the other end of the elastic assembly 2, and the second hinge part 5012 is hinged to the crawler frame 1; the swing frame 3 has a first connecting part 3011 and a pair of second connecting parts 3023, the first connecting part 3011 is located between the pair of second connecting parts 3023, the first connecting part 3011 is hinged to the third hinge part 5013, and the pair of second connecting parts 3023 are correspondingly connected to the pair of supporting rollers 4.

[0052] By applying the supporting wheel support structure of the present embodiment, when operating on complex working surfaces such as rugged or muddy roads, a pair of supporting wheels 4 can be swung around the connecting frame 5 through the swing frame 3, so that the pair of supporting wheels 4 can better fit the changes in the rugged road surface, and the contact area and adhesion ability of the supporting wheels 4 and the road surface are improved, and the situation where one supporting wheel 4 is suspended and not subjected to force while other single supporting wheels 4 are subjected to force due to the unevenness of the rugged road surface is avoided, and the single-point force situation of the supporting wheel 4 and the rubber track is avoided, and the force size is reduced, thereby improving reliability and avoiding unilateral wear or derailment of the wheel edge of the supporting wheel 4 and the track. When encountering impact loads on the working surface or rapidly crossing rough roads, the impact loads on the pair of track rollers 4 are transmitted to the elastic component 2 via the swing frame 3 and the connecting frame 5. The elastic deformation of the elastic component 2 then absorbs the impact loads, thereby achieving vibration reduction. This reduces the impact of the track roller 4 impact load on the track frame 1 and the vehicle frame, reducing impact stress. This reduces the impact of the rubber track, improving reliability, and reduces the impact amplitude of the track frame 1 and the vehicle frame, improving comfort during operation. The synergistic effect of the swinging of the track rollers 4 and the swing frame 3, combined with the vibration reduction of the elastic component 2, significantly reduces the impact loads on rough or muddy roads. The track rollers 4 and the track better adapt to changes in the road surface, increasing operating speed and significantly improving efficiency. This also improves comfort, reduces the impact load and amplitude of components, and enhances reliability.

[0053] Further, if Figure 6 As shown, the first connection portion 3011 and the pair of second connection portions 3023 are arranged in a triangle, which facilitates the connection between the swing frame 3 and the connecting frame 5 and the supporting wheel 4, and can also improve the structural strength and reliability of the swing frame 3.

[0054] In one embodiment, Figures 7 to 10 As shown, the elastic assembly 2 includes a sliding shaft 201, a connecting outer cylinder 202, and an elastic member 203. The first end of the sliding shaft 201 extends from the first end of the connecting outer cylinder 202 into the connecting outer cylinder 202, and the sliding shaft 201 can slide relative to the connecting outer cylinder 202. One of the second ends of the sliding shaft 201 and the second end of the connecting outer cylinder 202 is hinged to the track frame 1, and the other of the second ends of the sliding shaft 201 and the second end of the connecting outer cylinder 202 is connected to the first hinge portion 5011. The elastic member 203 is sleeved on the sliding shaft 201, and one end engages with the first end of the connecting outer cylinder 202. When subjected to external impact loads, the sliding shaft 201 slides back and forth relative to the connecting outer cylinder 202, thereby compressing the elastic member 203. The elastic deformation of the elastic member 203 absorbs the impact load, thereby achieving vibration reduction. The elastic assembly 2 has the advantages of being simple, strong, and stable, and is suitable for various roads. The elastic assembly 2 also has a simple structure, which is easy to implement and reduces costs.

[0055] Specifically, the second end of the sliding shaft 201 is hinged to the track frame 1, and the second end of the connecting outer cylinder 202 is connected to the first hinge portion 5011. Of course, as an alternative embodiment, the second end of the sliding shaft 201 is connected to the first hinge portion 5011, and the second end of the connecting outer cylinder 202 is hinged to the track frame 1.

[0056] In one embodiment, the connecting outer cylinder 202 is provided with a guide slot 2021 extending through its inner and outer walls. The guide slot 2021 extends along the sliding direction of the sliding shaft 201. A guide member 204 is provided on the first end of the sliding shaft 201. The guide member 204 is positioned within and slidable within the guide slot 2021. The cooperation between the guide slot 2021 and the guide member 204 not only guides the sliding of the sliding shaft 201 but also prevents the sliding shaft 201 from rotating or falling out of the connecting outer cylinder 202 due to external factors, thereby ensuring a safe and reliable structure.

[0057] Furthermore, the guide member 204 is a guide screw, and a threaded hole is provided on the first end of the sliding shaft 201. The guide screw is fixed to the threaded hole to prevent the guide bolt from falling out and rotating, which is safer and more reliable. The guide elongated hole 2021 can be a waist-shaped hole, but is not limited thereto.

[0058] Specifically, if Figure 3 、 Figure 7 and Figure 10 As shown, the second end of the outer cylinder 202 and the first hinged portion 5011 are connected by a connecting pin 207. The second end of the outer cylinder 202 is provided with a first penetration hole for the connecting pin 207 to penetrate. The first hinged portion 5011 is a first hinged hole for the connecting pin 207 to penetrate. A third shaft sleeve 206 is provided in the first penetration hole, and a fourth shaft sleeve 503 is provided in the first hinged hole. The shaft sleeve is a lubrication-free structure and does not require daily maintenance.

[0059] Furthermore, the second end of the sliding shaft 201 is connected to the track frame 1 via a connecting member 6. A second through-hole for the connecting member 6 is provided at the second end of the sliding shaft 201. A through-hole for the connecting member 6 is provided on the track frame 1 at a position corresponding to the second through-hole. The second hinged portion 5012 is also connected to the track frame 1 via the connecting member 6. The second hinged portion 5012 is a second hinged hole for the connecting member 6 to pass through. A through-hole for the connecting member 6 to pass through is provided on the track frame 1 at a position corresponding to the second hinged hole. A fifth shaft sleeve 504 is provided within the second hinged hole. Specifically, the connecting member 6 is a pin, which provides a simple structure and facilitates connection.

[0060] In one embodiment, an inner annular groove 2022 is formed on the inner wall of the connecting outer cylinder 202. An elastic support sleeve 205 is disposed in the inner annular groove 2022. The elastic support sleeve 205 is sleeved onto the sliding shaft 201. The elastic support sleeve 205 primarily supports the sliding shaft 201 as it slides relative to the connecting outer cylinder 202. The elastic support sleeve 205 supports the sliding shaft 201, thereby reducing direct contact between the sliding shaft 201 and the connecting outer cylinder 202, avoiding rapid wear due to direct abrasion, and extending the service life of the connecting outer cylinder 202 and the sliding shaft 201.

[0061] Furthermore, the elastic support sleeve 205 has an opening, which is fixed in the inner ring groove 2022 to facilitate assembly. A limiting boss 303 is provided on the sliding shaft 201 on one side of the second through-hole. The limiting boss 303 abuts and cooperates with the other end of the elastic member 203, thereby limiting the position of the other end of the elastic member 203.

[0062] In one embodiment, a rotation-stopping structure is provided between the elastic component 2 and the connecting frame 5 to prevent relative rotation between the connecting frame 5 and the elastic component 2. The rotation-stopping structure acts as a limit to prevent relative rotation between the elastic component 2 and the connecting frame 5, and the rotation-stopping structure is substantially free of force.

[0063] Furthermore, the anti-rotation structure includes an anti-rotation protrusion 5014 and an anti-rotation groove 2023. The anti-rotation protrusion 5014 is provided on one of the elastic component 2 and the connecting frame 5, and the anti-rotation groove 2023 is provided on the other of the elastic component 2 and the connecting frame 5. In other words, the anti-rotation protrusion 5014 is provided on the connecting frame 5, and the anti-rotation groove 2023 is provided on the elastic component 2, or the anti-rotation protrusion 5014 is provided on the elastic component 2, and the anti-rotation groove 2023 is provided on the connecting frame 5. The anti-rotation structure has a simple structure and is easy to process and manufacture.

[0064] In one embodiment, two elastic assemblies 2 are arranged in parallel. The connecting frame 5 includes two opposing connecting arms 501. Each connecting arm 501 has a first hinge portion 5011, a second hinge portion 5012, and a third hinge portion 5013. The other ends of the two elastic assemblies 2 are articulated with the first hinge portions 5011 of the two connecting arms 501, one for each. When subjected to external forces, the two elastic assemblies 2 and the two connecting arms 501 cause the suspension damping assembly to swing as a whole, ensuring that the left and right sides are subjected to synchronized forces and preventing unbalanced loading.

[0065] Specifically, the left and right sides of the connecting frame 5 are connected to the crawler frame 1 through elastic components 2. In other words, the connecting frame 5 is connected to the crawler frame 1 through a pair of elastic components 2 formed by two elastic components 2. After the connecting frame 5 and the swing frame 3 are connected, they form an integral structure, so that when the supporting wheel 4 is impacted or impacted by a unilateral load, the elastic component 2 can be synchronously compressed as a whole, and the compression amount of the elastic components 2 on both sides of the connecting frame 5 is the same, thereby ensuring that the supporting wheel 4 only performs synchronous vibration reduction movement within the crawler frame 1; when the supporting wheel 4 is subjected to an eccentric load or a unilateral impact load, there will be no different compression amounts of the elastic components 2, resulting in different vibration reduction compression on the left and right sides of the supporting wheel 4 and unilateral wear or derailment of the wheel edge of the supporting wheel 4 and the crawler.

[0066] It should be noted that the only difference between the two elastic components 2 is that the positions of the anti-rotation groove 2023 provided on the connecting outer tube 202 are different. The anti-rotation groove 2023 on the connecting outer tube 202 of the right elastic component faces right, and the anti-rotation groove 2023 on the connecting outer tube 202 of the left elastic component 2 faces right. The rest of the structures are the same.

[0067] In one embodiment, the connecting frame 5 further includes a connecting member 502, which connects the two connecting arms 501. The two connecting arms 501 are reinforced by the connecting member 502 to improve the overall structural strength.

[0068] Furthermore, there are two connecting members 502 and they are spaced apart. Specifically, the connecting members 502 are reinforced round steels, and the connecting frame 5 is an integral structure reinforced by reinforced round steels in the middle, so the structure has high strength.

[0069] 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 and extend along the length of the track frame 1. The front and rear ends of the two arms 302 form second connecting portions 3023, and 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.

[0070] 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".

[0071] Furthermore, if Figures 4 to 6As 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 third hinge portion 5013 is a third hinge hole with a second shaft sleeve 703 disposed therein. 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 and require no lubrication, thus requiring no routine maintenance. The swing frame 3 is connected to the second shaft sleeve 703 within the connecting frame 5 via the connecting shaft 701, allowing the pair of supporting rollers 4 to swing about the connecting frame 5 via the swing frame 3 and the connecting shaft 701.

[0072] It should be noted that all bushings are lubrication-free structures, which can greatly increase the service life of the suspension vibration reduction components.

[0073] 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 secure the connecting shaft 701. These fasteners are, for example, setscrews 704.

[0074] Furthermore, the support arm 302 has a receiving groove 3021 at a position corresponding to the first connecting portion 3011, and the connecting frame 5 has a downwardly protruding connecting protrusion, which is located in the receiving groove 3021. The cooperation between the receiving groove 3021 and the connecting protrusion can ensure that the swing frame 3 can swing relative to the connecting frame 5.

[0075] In one embodiment, Figure 4 and Figure 6 As shown, the track roller 4 has an annular groove 401, and the swing frame 3 has a boss 303 that extends into the annular groove 401. The boss 303 not only strengthens the structural strength of the swing frame 3, but also aligns with the annular groove 401 on the track roller 4, allowing for the removal of accumulated debris within the annular groove 401 of the track roller 4. Specifically, the boss 303 is formed on the swing body 301.

[0076] In one embodiment, Figure 4 and Figure 6As shown, each track roller 4 includes an axle and a wheel body rotatably mounted on the axle. The end surface of the axle has an outwardly protruding support protrusion 402. The top surface of the support protrusion 402 forms a support surface, and the second connecting portion 3023 has a contact surface that contacts the support surface. The axle of the track roller 4 is connected to the two support arms 302 via connecting bolts 8. When the track roller 4 is subjected to radial force, the radial force is transmitted to the swing frame 3 through the supporting protrusions 402 on both sides and the bottom of the swing frame 3. The radial force is not transmitted to the connecting bolts 8 connecting the track roller 4 and the swing frame 3. The connecting bolts 8 only fix the track roller 4 axially and are not subjected to radial force, thereby improving reliability.

[0077] Furthermore, the second connecting portion 3023 is a connecting hole for the connecting bolt 8 to pass through.

[0078] It is worth noting that there are at least two suspension vibration damping assemblies, and at least two suspension vibration damping assemblies are arranged along the front-to-back direction. The front end and the rear end of the suspension vibration damping assembly are hingedly connected to the crawler frame 1 through a pin shaft.

[0079] In one embodiment, Figure 1 、 Figure 2 and Figures 12 to 14 As shown, the track frame 1 has a downwardly open mounting cavity, within which the elastic assembly 2, connecting frame 5, and swing frame 3 are located. A pair of track rollers 4 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 minimizing abnormal damage and improving reliability.

[0080] It should be noted that the suspension and vibration damping assembly is placed 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 because the suspension and vibration damping assembly is placed within the track frame 1, preventing the connecting shaft 701 from axially moving out and causing separation of the swing frame 3 and the elastic assembly 2, thereby improving safety redundancy. At the same time, because a lubrication-free first sleeve 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 sleeve 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.

[0081] In one embodiment, Figure 13As 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 roller 4 swings up and down to a certain range via the second connecting portion 3023 of the swing frame 3, it contacts the limit seat 108 within the track frame 1. The limit seat 108 limits the swing range 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 roller 4.

[0082] In one embodiment, Figures 12 to 14 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 longitudinal beam 101's extension direction. A pair of support plates 102 is spaced apart, forming an installation space between the support plates 102 on the same side and the corresponding side plates of the longitudinal beam 101. The installation space contains an elastic assembly 2 and a connecting arm 501. The pair of support plates 102, the two side plates of the longitudinal beam 101, and one end of the elastic assembly 2 are connected by a connecting member 6. The pair of support plates 102, the two side plates of the longitudinal beam 101, and the second hinge portion 5012 of the connecting frame 5 are also 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.

[0083] 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 .

[0084] 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.

[0085] 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.

[0086] 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.

[0087] 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 .

[0088] 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.

[0089] 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 mate with the ends of the connecting member 6 to improve the stability and load-bearing capacity of the connection. The through-holes in the plates 105 are circular.

[0090] Furthermore, through holes are provided on the first U-shaped plate 1011, the second U-shaped plate 1012 and the four pairs of support plates 102, and the elastic components 2 on both sides are respectively placed in the installation space; one end of the elastic components 2 on both sides are hingedly fixed to the through holes on the crawler frame 1 through a pin, and the other end of the elastic components 2 on both sides are hingedly fixed to the two connecting arms 501 of the connecting frame 5 through a connecting pin 207, a fastening nut 208 and a gasket 209; the connecting frame 5 is placed in the installation space and is hingedly fixed to the through holes on the crawler frame 1 through a pin. The pin is a coaxial through-type structure, which is convenient for assembly and maintenance, and assembly, maintenance and replacement can be achieved from the outside of the crawler frame 1; at the same time, a four-point support structure is formed between the pin and the elastic components 2 on both sides and the crawler frame 1, which reduces the deflection and deformation of the pin during operation.

[0091] Specifically, a limit sleeve 9 is provided on the pin shaft, which is located in the installation space and between the corresponding sliding shaft 201 and the side plate. The limit sleeve 9 can prevent the valve gap between the sliding shaft 201 and the corresponding side from being too large and causing left and right swinging.

[0092] 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-like closed structure of the track frame 1, which has good overall strength and rigidity.

[0093] 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.

[0094] Specifically, a suspension vibration reduction assembly is provided between the supporting wheel 4 and the crawler frame 1 to realize a suspension vibration reduction connection between the supporting wheel 4 and the crawler frame 1; the supporting wheel 4 is movably hinged to the swing frame 3, the swing frame 3 is movably hinged to the connecting frame 5, and the elastic assembly 2 is movably hinged to the connecting frame 5. When the vehicle is in a state of being overloaded or muddy, the support frame 1 is provided with a plurality of support wheels 4, and the support wheels 4 are provided with a plurality of support wheels 4 respectively.

[0095] Furthermore, the engineering machinery includes but is not limited to loaders, excavators, cranes, pile drivers, mixers, etc.

[0096] 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: A crawler frame (1), a pair of supporting wheels (4) and a suspension vibration reduction assembly, wherein the suspension vibration reduction assembly comprises: An elastic component (2), one end of which is hinged to the crawler frame (1), and the elastic component (2) is used for vibration reduction; A connecting frame (5) having a first hinge portion (5011), a second hinge portion (5012) and a third hinge portion (5013), wherein the first hinge portion (5011) is hinged to the other end of the elastic component (2), and the second hinge portion (5012) is hinged to the crawler frame (1); The swing frame (3) comprises a first connecting portion (3011) and a pair of second connecting portions (3023), wherein the first connecting portion (3011) is located between the pair of second connecting portions (3023), the first connecting portion (3011) is hinged to the third hinge portion (5013), and the pair of second connecting portions (3023) are correspondingly connected to a pair of supporting wheels (4).

2. The track roller support structure according to claim 1, characterized in that: The elastic component (2) comprises a sliding shaft (201), a connecting outer cylinder (202) and an elastic member (203); the first end of the sliding shaft (201) extends from the first end of the connecting outer cylinder (202) into the connecting outer cylinder (202); the sliding shaft (201) can slide relative to the connecting outer cylinder (202); one of the second end of the sliding shaft (201) and the second end of the connecting outer cylinder (202) is hinged to the track frame (1); the other of the second end of the sliding shaft (201) and the second end of the connecting outer cylinder (202) is connected to the first hinge portion (5011); the elastic member (203) is sleeved on the sliding shaft (201) and one end of the elastic member is engaged with the first end of the connecting outer cylinder (202).

3. The track roller support structure according to claim 2, characterized in that: The connecting outer cylinder (202) is provided with a guide strip hole (2021) that passes through the inner wall and the outer wall thereof. The guide strip hole (2021) extends along the sliding direction of the sliding shaft (201). A guide member (204) is provided on the first end of the sliding shaft (201). The guide member (204) is located in the guide strip hole (2021) and can slide in the guide strip hole (2021).

4. The track roller support structure according to claim 2, characterized in that: An inner ring groove (2022) is provided on the inner wall of the connecting outer cylinder (202), an elastic support sleeve (205) is provided in the inner ring groove (2022), and the elastic support sleeve (205) is sleeved on the sliding shaft (201).

5. The track roller support structure according to any one of claims 1 to 4, characterized in that: A rotation-stop structure is provided between the elastic component (2) and the connecting frame (5) to prevent relative rotation between the connecting frame (5) and the elastic component (2).

6. The track roller support structure according to claim 5, characterized in that: The anti-rotation structure comprises an anti-rotation protrusion (5014) and an anti-rotation groove (2023), wherein the anti-rotation protrusion (5014) is arranged on one of the elastic component (2) and the connecting frame (5), and the anti-rotation groove (2023) is arranged on the other of the elastic component (2) and the connecting frame (5).

7. The track roller support structure according to any one of claims 1 to 4, characterized in that: The number of the elastic components (2) is two and they are arranged in parallel. The connecting frame (5) comprises two connecting arms (501) arranged opposite to each other. Each of the connecting arms (501) has a first hinge portion (5011), a second hinge portion (5012) and a third hinge portion (5013). The other ends of the two elastic components (2) are hinged to the first hinge portions (5011) of the two connecting arms (501) in a one-to-one correspondence.

8. The track roller support structure according to claim 7, characterized in that: The connecting frame (5) further comprises a connecting member (502), wherein the connecting member (502) connects the two connecting arms (501).

9. The track roller support structure according to any one of claims 1 to 4, 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 and rear ends of the two supporting arms (302) form the second connecting portion (3023), and the first connecting portion (3011) is formed on the swing body (301).

10. An engineering machine, characterized in that: include: Frame; The track wheel support structure according to any one of claims 1 to 9 is provided on the vehicle frame.

Images