Landing leg disc and engineering machinery

Abstract

The utility model relates to the technical field of engineering machinery, and discloses a supporting leg disc and engineering machinery. The landing leg disc comprises a landing disc, the landing disc comprises a lower support, and the top of the lower support is provided with a concave part; the upper support is arranged in the sunken part, and the upper support is provided with a body part and a protruding part; the upper cover plate is fixed to the lower support, an accommodating space is defined by the upper cover plate and the lower support, the body part is located in the accommodating space, and an avoiding hole for avoiding the protruding part is formed in the upper cover plate; and the flexible friction sliding block is arranged between the lower support and the upper support, and the flexible friction sliding block and the upper support are suitable for sliding in the concave part relative to the lower support when bearing the horizontal component force of the external force. The upper support and the lower support are in flexible connection, when the vertical oil cylinder connected with the upper support is subjected to horizontal component force of external force, the flexible friction sliding block and the upper support do ball swinging motion in the concave part relative to the lower support, the horizontal force transmitted into a structural part is reduced, the service life of the structural part is prolonged, and the structural part is prevented from being damaged in vibration and unbalance loading.

Description

Technical Field

[0001] The utility model relates to the technical field of engineering machinery, in particular to an outrigger plate and an engineering machinery. Background Art

[0002] In the process of using large-tonnage lifting engineering machinery, in order to ensure the stability and safety of the crane and other engineering machinery, it is necessary to extend the movable legs to increase the span of the chassis structure, and the vertical cylinder and the foot plate installed on the legs are supported on the ground through the foot pad. During the process of lifting and rotating on the vehicle, especially under heavy load conditions, the chassis frame and the root of the leg are deformed and sunk due to the load, and the ground is uneven, causing the vertical cylinder to be subjected to bending moment and flexural deformation. The bending moment borne by the vertical cylinder is transmitted to the foot plate through the ball socket to form a horizontal component. When this horizontal force is greater than the static friction between the foot plate and the pad, the foot plate will slide instantly. Due to the existence of bending moment, the stress on the foot plate, vertical cylinder and other structural parts will increase sharply, resulting in failure of the structural parts. Utility Model Content

[0003] In view of this, the utility model provides a leg plate and an engineering machinery to solve the problem that the leg plate slides when the vertical cylinder is subjected to bending moment, causing the leg plate, the vertical cylinder and other structural parts to fail easily.

[0004] In the first aspect, the utility model provides a leg plate, comprising: a floor plate, the floor plate comprising: a lower support, having a recessed portion on the top; an upper support, arranged in the recessed portion, the upper support having a main body and a protrusion protruding from the upper surface of the main body; an upper cover plate, fixed on the lower support and forming a receiving space with the lower support, the main body being located in the receiving space, and an avoidance hole for avoiding the protrusion being provided on the upper cover plate; a flexible friction slider, arranged between the lower support and the upper support, the flexible friction slider and the upper support being suitable for sliding in the recessed portion relative to the lower support when subjected to a horizontal component of an external force.

[0005] Beneficial effect: A flexible friction slider is arranged between the upper support and the lower support, that is, the upper support and the lower support are flexibly connected. When the vertical cylinder connected to the upper support is subjected to the horizontal component of the external force, the flexible friction slider and the upper support make a swinging ball motion in the recessed portion relative to the lower support. The flexible connection can reduce the horizontal force transmitted to the structural parts, extend the service life of structural parts such as the support foot plate and the vertical cylinder, and protect the structural parts from damage during vibration and eccentric load. The flexible connection can also consume vibration energy to achieve seismic isolation and energy dissipation.

[0006] In an optional embodiment, the recessed portion has a recessed curved surface that is low in the middle and high around the periphery, and the flexible friction sliding block is suitable for being reset through the recessed curved surface after the external force disappears.

[0007] Beneficial effect: When the external force is unloaded, the concave curved surface enables the flexible friction slider and the upper support to return to their original positions after displacement, achieving automatic reset without manual reset.

[0008] In an optional implementation, the concave curved surface is a portion of a spherical surface.

[0009] Beneficial effects: The sliding of the flexible friction slider on the spherical surface forms spherical contact friction, which prolongs the overall vibration period of the structure, thereby greatly reducing the dynamic amplification effect caused by the alternating force, and the spherical surface can restore the upper support to its original position after displacement.

[0010] In an optional embodiment, the flexible friction sliding block has a sliding curved surface that slides in cooperation with the concave curved surface.

[0011] Beneficial effect: When the flexible friction slider slides, the sliding curved surface and the concave curved surface slide and cooperate with each other, which can reduce the wear between the flexible friction slider and the lower support and extend the service life of the flexible friction slider and the lower support.

[0012] In an optional embodiment, a mounting groove is provided on the bottom surface of the main body, and the upper portion of the flexible friction sliding block is located in the mounting groove.

[0013] Beneficial effect: The setting of the installation groove facilitates the installation of the flexible friction slider and reduces the difficulty of assembly.

[0014] In an optional embodiment, the flexible friction sliding block is made of a composite material of rubber material and friction-reducing material.

[0015] Beneficial effects: Rubber materials have the advantages of good elasticity, good impact mitigation, vibration absorption, etc. Anti-friction materials have the characteristics of low friction coefficient and good wear resistance, which can effectively reduce the friction between the flexible friction slider and the lower support.

[0016] In an optional embodiment, the leg plate further includes an elastic ring, which is disposed in the receiving space and sleeved on the outside of the main body.

[0017] Beneficial effect: When the upper support slides, the upper support collides with the elastic ring. The setting of the elastic ring can avoid the upper support and the lower support from hard contact, which can not only reduce the wear of the upper support, but also effectively reduce the noise generated when the upper support and the lower support come into hard contact.

[0018] In an optional embodiment, a gap is formed between the upper support and the lower support.

[0019] Beneficial effect: The flexible friction slider supports the upper support in a direction away from the lower support. This arrangement can reduce the contact between the main body and the lower support and reduce wear. On the other hand, a friction pendulum structure can be formed when a force is applied to perform a swinging ball motion.

[0020] In an optional embodiment, the leg plate further includes a ball joint seat and a connecting frame, the ball joint seat is fixed on the upper support, and the ball joint seat is arranged on the connecting frame.

[0021] Beneficial effects: the ball joint seat and the ball head of the vertical oil cylinder are rollingly matched, the connecting frame is used to connect with the ball head of the vertical oil cylinder, and the connecting frame can fix the leg plate on the ball head, making it easy to fix the leg plate and the vertical oil cylinder.

[0022] In a second aspect, the utility model further provides an engineering machinery, comprising: a chassis structure; a movable leg movably arranged on the chassis structure; and the above-mentioned leg plate connected to the movable leg. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] 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 creative work.

[0024] Figure 1 A three-dimensional diagram of a leg tray according to an embodiment of the utility model;

[0025] Figure 2 for Figure 1 a cross-sectional view of the leg tray shown;

[0026] Figure 3 for Figure 1 Exploded view of the outrigger tray shown.

[0027] Description of reference numerals:

[0028] 1. lower support; 11. main body; 12. flange; 101. concave curved surface; 102. gap;

[0029] 2. Upper support; 201. Mounting groove; 202. Main body; 203. Protruding portion;

[0030] 3. Upper cover plate; 301. Avoidance hole;

[0031] 4. Flexible friction slider; 401. Sliding surface;

[0032] 5. Ball joint seat;

[0033] 6. Connecting frame;

[0034] 7. Elastic ring. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0036] Combine the following Figures 1 to 3 , describing an embodiment of the utility model.

[0037] According to an embodiment of the utility model, on the one hand, a leg plate is provided, comprising: a floor plate, the floor plate comprising: a lower support 1, an upper support 2, an upper cover plate 3 and a flexible friction slider 4, the lower support 1 having a recessed portion on the top; the upper support 2 is arranged in the recessed portion, the upper support 2 having a main body 202 and a protrusion 203 protruding from the upper surface of the main body 202; the upper cover plate 3 is fixed on the lower support 1 and forms a receiving space with the lower support 1, the main body 202 is located in the receiving space, and an avoidance hole 301 for avoiding the protrusion 203 is provided on the upper cover plate 3; the flexible friction slider 4 is arranged between the lower support 1 and the upper support 2, and the flexible friction slider 4 and the upper support 2 are suitable for sliding in the recessed portion relative to the lower support 1 when subjected to the horizontal component of an external force.

[0038] When the leg plate of this embodiment is used, a flexible friction slider 4 is arranged between the upper support 2 and the lower support 1, that is, the upper support 2 and the lower support 1 are flexibly connected. When the vertical cylinder connected to the upper support 2 is subjected to the horizontal component of the external force, the flexible friction slider 4 and the upper support 2 make a swinging ball motion in the recessed portion relative to the lower support 1. The flexible connection can reduce the horizontal force transmitted to the structural parts, extend the service life of structural parts such as the leg plate and the vertical cylinder, and protect the structural parts from damage during vibration and eccentric loading. The flexible connection can also consume vibration energy to achieve seismic isolation and energy dissipation.

[0039] Specifically, the upper cover plate 3 is used to connect the upper support 2 and the lower support 1, so that the upper support 2 can move relative to the lower support 1. Under the action of the horizontal component of the eccentric load, the upper support 2 moves through circumferential friction, so that the vertical force of the eccentric load coincides with the force center line of the support foot plate, thereby eliminating the eccentric load and effectively alleviating the damage to structural parts such as the support foot plate and the vertical cylinder caused by the eccentric load; under the action of the alternating force, the transition is carried out through the flexible friction slider 4, and the contact friction formed by the sliding of the flexible friction slider 4 on the recessed part consumes the vibration energy, thereby eliminating the power amplification effect brought about by the alternating force, consuming the vibration energy, and realizing seismic isolation and energy dissipation.

[0040] In this embodiment, the lower support 1 includes a main body 11 and a flange 12. The main body 11 is substantially disc-shaped, and the flange 12 is disposed on and protrudes from the edge of the main body 11. The flange 12 is fixedly connected to the main body 11.

[0041] Further, the upper cover plate 3 is roughly annular. The upper cover plate 3 is arranged opposite to the lower support 1. The upper cover plate 3 is connected to the flange portion 12. The width of the ring of the upper cover plate 3 is greater than the width of the flange portion 12. In other words, the inner ring of the ring of the upper cover plate 3 extends from the inner ring of the flange portion 12 toward the center of the circle. A part of the upper cover plate 3 is arranged opposite to the main body portion 11 at a distance.

[0042] Specifically, the upper support 2 includes a body 202 and a protrusion 203. The body 202 is generally disc-shaped, and its end is located in the space between the upper cover 3 and the main body 11, so that the upper support 2 is confined in the receiving space surrounded by the upper cover 3 and the lower support 1.

[0043] Furthermore, the protrusion 203 is substantially in the shape of a truncated cone and protrudes from the circular ring of the upper cover plate 3 , and the top of the protrusion 203 is arranged higher than the top surface of the upper cover plate 3 .

[0044] Specifically, the body portion 202 is surrounded by the flange portion 12 of the lower support 1 , and the thickness of the body portion 202 is smaller than the thickness of the flange portion 12 .

[0045] Furthermore, the flexible friction slider 4 is substantially in the shape of a disc with convex upper and lower surfaces, and is disposed between the main body 11 of the lower support 1 and the main body 202 of the upper support 2 .

[0046] It can be understood that the shapes of the lower support 1, the upper support 2, and the upper cover plate 3 can also be set to be rectangular or the like.

[0047] In one embodiment, the main body 11 has a concave curved surface 101 which is low in the middle and high around. The flexible friction slider 4 is arranged at the concave portion, and is suitable for being reset through the concave curved surface 101 after the external force disappears. It should be noted that when no external force is applied, the central axis of the concave curved surface 101 of the lower support 1, the central axis of the upper support 2, and the central axis of the flexible friction slider 4 coincide with each other. The so-called reset of the flexible friction slider 4 refers to the return of the central axis of the flexible friction slider 4 to a position where it coincides with the central axis of the concave curved surface 101 of the lower support 1. When the external force is unloaded, the concave curved surface 101 enables the flexible friction slider 4 and the upper support 2 to return to their original positions after displacement, thereby achieving automatic reset without manual reset.

[0048] Furthermore, the concave curved surface 101 is a part of the spherical surface, and the sliding of the flexible friction slider 4 on the spherical surface forms spherical contact friction, which prolongs the overall vibration period of the structural component, thereby greatly reducing the dynamic amplification effect caused by the alternating force, and the spherical surface can enable the upper support 2 to return to its original position after displacement.

[0049] Specifically, the edge of the concave curved surface 101 is spaced a certain distance from the inner ring of the flange portion 12 , and is supported to enclose a receiving space between the top surface of the main body portion 11 and the bottom surface of the upper cover plate 3 .

[0050] In another embodiment, the edge of the recessed curved surface 101 extends to the flange portion 12 , and at this time, the bottom surface of the upper cover plate 3 is provided with a fixing groove connected to the avoidance hole 301 , and the main body 202 is located between the bottom wall of the fixing groove and the top surface of the lower support 1 .

[0051] In one embodiment, referring to Figure 3 The flexible friction slider 4 has a sliding curved surface 401 that slides with the concave curved surface 101. When the flexible friction slider 4 slides, the sliding curved surface 401 slides with the concave curved surface 101, which can reduce the wear between the flexible friction slider 4 and the lower support 1 and extend the service life of the flexible friction slider 4 and the lower support 1.

[0052] Furthermore, the sliding surface 401 is also a part of a spherical surface, and the radius of the sphere corresponding to the sliding surface 401 is smaller than the radius of the sphere corresponding to the concave surface 101, so that when the flexible friction slider 4 does not slide, there is a gap between the edge of the sliding surface 401 and the part of the concave surface 101 corresponding to it.

[0053] In one embodiment, a mounting groove 201 is provided on the bottom surface of the body 202, and the upper portion of the flexible friction slider 4 is located in the mounting groove 201. The provision of the mounting groove 201 facilitates the installation of the flexible friction slider 4 and reduces the difficulty of assembly.

[0054] Furthermore, the maximum thickness of the flexible friction slider 4 is greater than the sum of the height of the mounting groove 201 and the maximum height of the concave curved surface 101, and as mentioned above, the thickness of the main body 202 is less than the thickness of the flange 12, so that a gap 102 is formed between the bottom surface of the main body 202 of the upper support 2 and the main body 11 of the lower support 1. In other words, the flexible friction slider 4 supports the upper support 2 in a direction away from the lower support 1. Such a configuration can, on the one hand, reduce the contact between the main body 202 and the main body 11 and reduce wear, and on the other hand, can form a friction pendulum structure when subjected to force, and perform a swinging ball motion.

[0055] In one embodiment, the leg plate further includes an elastic ring 7, which is disposed in the receiving space and sleeved outside the main body 202. When the upper support 2 slides, the upper support 2 collides with the elastic ring 7. The provision of the elastic ring 7 can prevent the upper support 2 and the lower support 1 from hard contact, which can not only reduce the wear of the upper support 2, but also effectively reduce the noise generated when the upper support 2 and the lower support 1 are in hard contact.

[0056] Furthermore, the elastic ring 7 is specifically a rubber ring made of rubber material, and the rubber material has the advantages of good elasticity, good impact mitigation and vibration absorption capabilities.

[0057] In one embodiment, the flexible friction slider 4 is made of a composite material of a rubber material and a friction-reducing material. In this case, the flexible friction slider 4 can be called a composite friction slider. The rubber material has the advantages of good elasticity, good impact mitigation, and vibration absorption. The friction-reducing material has the characteristics of low friction coefficient and good wear resistance, and can effectively reduce the friction between the flexible friction slider 4 and the lower support 1. The friction-reducing material is specifically graphite or the like.

[0058] In one embodiment, the upper cover plate 3 is fixed to the lower support 1 by fasteners, and the fixing method of the upper cover plate 3 and the lower support 1 is simple and reliable. The fasteners are specifically bolts or screws.

[0059] Furthermore, since the upper support 2 and the flexible friction slider 4 are slidable relative to the lower support 1 and the upper cover plate 3, the upper support 2 does not need to be connected to the lower support 1 and the upper cover plate 3. The upper support 2 and the flexible friction slider 4 can be confined between the lower support 1 and the upper cover plate by directly fixing the upper cover plate 3 to the lower support 1. The flexible friction slider 4 and the upper support 2 can be connected by welding or other fixing methods. When the upper support 2 is provided with an installation groove, the flexible friction slider 4 and the upper support 2 may also be disconnected.

[0060] It should be noted that a ball joint seat 5 is fixed on the protruding portion 203 of the upper support 2, and the ball joint seat 5 is rollingly matched with the ball head on the end of the piston rod of the vertical oil cylinder.

[0061] In one embodiment, the leg plate further includes a ball joint seat 5 and a connecting frame 6, wherein the ball joint seat 5 is fixed on the upper support 2, and the ball joint seat 5 is arranged on the connecting frame 6. The ball joint seat 5 is in rolling cooperation with the ball head of the vertical oil cylinder, and the connecting frame 6 is used to connect with the ball head of the vertical oil cylinder. The connecting frame 6 can fix the leg plate on the ball head, so that the fixing of the leg plate and the vertical oil cylinder is simple. The ball joint seat 5 is used to withstand the alternating force transmitted by the vertical cylinder. The upper support 2 and the composite friction slider are combined to perform friction swing on the spherical concave surface 101 of the lower support 1. The composite friction slider forms a soft connection between the upper support 2 and the lower support 1. During the rotation of the upper vehicle hoist, under the action of the alternating force and the eccentric load, the upper support 2 and the composite friction slider perform a swinging ball motion in the depression of the lower support 1. The sliding of the composite friction slider on the concave surface 101 forms spherical contact friction, which extends the overall vibration period of the structural member, thereby greatly reducing the power amplification effect caused by the alternating force; the spherical concave surface 101 enables the upper support 2 to return to its original position after displacement.

[0062] According to an embodiment of the utility model, on the other hand, there is also provided an engineering machine, comprising: a chassis structure, a movable leg and the above-mentioned leg plate, wherein the movable leg can be movably arranged on the chassis structure, and the leg plate is connected to the movable leg.

[0063] Furthermore, the construction machinery includes but is not limited to excavators, cranes, pile drivers, mixers, etc.

[0064] In the related technology, at the moment of loading, the accumulation of deformations such as the fitting clearance of the frame and the outriggers will increase the flexural deformation of the ball head of the vertical cylinder, thereby causing the foot plate to slip instantly; at the moment of unloading, the flexural deformation of the vertical cylinder partially disappears instantly, causing the foot plate to reset urgently; during the loading or unloading process, due to the existence of bending moment, the stress on structural parts such as the foot plate and the vertical cylinder will increase sharply, leading to failure of the structural parts; and the vibration force formed by the change in bearing capacity caused by the rotation will cause the entire vehicle to tremble and make a loud noise like an earthquake.

[0065] In the present embodiment, a composite friction slider made of composite rubber material and friction-reducing material and a rubber ring made of rubber material are provided between the upper support 2 and the lower support 1. The composite friction slider and the rubber ring form a vibration isolation friction part, so that the upper support 2 and the lower support 1 are flexibly connected, with a simple structure and easy implementation. The swing of the composite friction slider can eliminate the eccentric load on the structural parts during operation, eliminate the damage to the structural parts caused by the eccentric load, and also eliminate the vibration and loud noise of the whole vehicle caused by heavy-load rotation. The friction generated between the concave curved surface 101 of the lower support 1 and the composite friction slider can consume vibration energy, realize vibration isolation and energy dissipation, and effectively alleviate the problems of easy damage to the structural parts and vibration of the whole vehicle during rotation in the prior art.

[0066] Although the embodiments of the present invention are described in conjunction with 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 are all within the scope defined by the appended claims.

Claims

1. A leg plate, characterized in that: include: A floor tray, the floor tray comprising: A lower support (1) having a concave portion at the top; An upper support (2) is arranged in the recessed portion, wherein the upper support (2) comprises a main body portion (202) and a protruding portion (203) protruding from an upper surface of the main body portion (202); An upper cover plate (3) is fixed on the lower support (1) and forms a receiving space with the lower support (1), the main body (202) is located in the receiving space, and an avoidance hole (301) for avoiding the protruding portion (203) is provided on the upper cover plate (3); A flexible friction slider (4) is arranged between the lower support (1) and the upper support (2); the flexible friction slider (4) and the upper support (2) are adapted to slide in the recessed portion relative to the lower support (1) when subjected to a horizontal component of an external force.

2. The leg tray according to claim 1, characterized in that: The recessed portion has a recessed curved surface (101) which is low in the middle and high around the periphery, and the flexible friction sliding block (4) is suitable for being reset through the recessed curved surface (101) after the external force disappears.

3. The leg tray according to claim 2, characterized in that: The concave curved surface (101) is a part of a spherical surface.

4. The leg tray according to claim 2, characterized in that: The flexible friction sliding block (4) has a sliding curved surface (401) that is slidably matched with the concave curved surface (101).

5. The leg tray according to any one of claims 1 to 4, characterized in that: A mounting groove (201) is provided on the bottom surface of the main body (202), and the upper part of the flexible friction sliding block (4) is located in the mounting groove (201).

6. The leg tray according to any one of claims 1 to 4, characterized in that: The flexible friction sliding block (4) is made of a composite material of a rubber material and a friction-reducing material.

7. The leg tray according to any one of claims 1 to 4, characterized in that: The leg plate further comprises an elastic ring (7), wherein the elastic ring (7) is arranged in the receiving space and sleeved on the outside of the main body (202).

8. The leg tray according to any one of claims 1 to 4, characterized in that: A gap (102) is formed between the upper support (2) and the lower support (1).

9. The leg tray according to any one of claims 1 to 4, characterized in that: The leg plate further comprises a ball joint seat (5) and a connecting frame (6); the ball joint seat (5) is fixed on the upper support (2); and the ball joint seat (5) is arranged on the connecting frame (6).

10. An engineering machine, characterized in that: include: Chassis structure; A movable leg, movably arranged on the chassis structure; The leg plate according to any one of claims 1 to 9, connected to the movable leg.

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