Crane track anti-vibration pad

Abstract

The invention relates to the technical field of shock pads, in particular to a crane rail shock pad which comprises at least two assemblies. The two combination bodies are oppositely buckled in the first direction to enter a combination state, each combination body is provided with a first limiting part to prevent the two combination bodies from displacing in the second direction to be separated from the combination state, and each combination body is provided with a second limiting part to prevent the two combination bodies from displacing in the third direction to be separated from the combination state; a joining seam for energy dissipation is formed at the buckling part of the two combined bodies in a combined state; a split structure is adopted, the overall stress area is differentiated, the number of stress concentration points is small when the shock pad is stressed, overall stress distribution is more uniform, a joining seam is matched, a single combination has a certain deformation space after being stressed, the problem that the shock pad moves out due to extrusion is avoided to the maximum extent, stable walking of a crane is ensured, and the service life of the crane is prolonged. And the problem that equipment is damaged due to the fact that the shock pad is disabled or runs out is solved, and the maintenance cost is effectively reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of shock pads, and in particular to a crane rail shock pad. Background Art

[0002] The foundation of the crane's traveling rail is a reinforced concrete pouring beam. Embedded plates are installed on the concrete beam every 70 cm. There is a pair of anchor bolts for fastening the rail on each embedded plate. The shock pad is installed between the rail and the embedded plate to play a shock-absorbing role when the crane is traveling, mainly to avoid events such as cracks in the traveling wheels, shaft fractures, and bearing damage;

[0003] Currently, the used shock pads are all integrally formed rubber pads, which have high compressive resistance under uniform stress;

[0004] However, when the overhead crane is traveling, the maximum pressure point on the rail will also move with the movement of the overhead crane. When the overhead crane travels to the rubber pad, one side of the rubber pad will first be subjected to gravity extrusion. As the overhead crane moves, the extrusion force will transfer to the other side of the rubber pad, resulting in uneven force on the rubber pad, excessive local stress on the rubber pad, a decrease in elastic modulus or inability to return to its original shape, and ultimately permanent deformation;

[0005] At the same time, when the rubber pad is subjected to force extrusion, its position will shift little by little. Over time, the problem of slipping out will occur, resulting in no shock absorption during the crane's travel, and events such as cracks in the traveling wheels, shaft fractures, and bearing damage will occur. The maintenance workload will increase significantly, which is neither economical nor labor-saving, prolongs the maintenance period, and affects the enterprise's safe production and economic benefits. Summary of the Invention

[0006] In view of the problems existing in the above-mentioned existing crane rail shock pads, the present invention is proposed.

[0007] The above technical problems are solved by the following technical solutions: The present invention provides a crane rail shock pad, including,

[0008] At least two combined bodies;

[0009] The two combined bodies are relatively buckled and joined into a combined state from the first direction. The combined body is provided with a first limiting portion to prevent the two combined bodies from displacing in the second direction and disengaging from the combined state, and the combined body is provided with a second limiting portion to prevent the two combined bodies from displacing in the third direction and disengaging from the combined state;

[0010] A connecting seam for energy dissipation is formed at the buckling joint of the two combined bodies in the combined state.

[0011] In a preferred embodiment of the crane rail shock pad of the present invention: The combined body is provided with a buckling groove and a buckling block;

[0012] After the snap groove and the snap block are snapped together, the two combined bodies cannot move reversely along the second direction, thereby forming a first limiting portion.

[0013] In a preferred embodiment of the crane rail shock pad of the present invention: the snap groove has a first notch and a second notch communicating therewith.

[0014] In a preferred embodiment of the crane rail shock pad of the present invention: the first notch and the second notch form an "L" - shaped structure;

[0015] The snap block is adapted to the snap groove of the "L" - shaped structure.

[0016] In a preferred embodiment of the crane rail shock pad of the present invention: the first notch is of an "L" - shaped structure, and the second notch is formed in a "bird's beak" shape on the surface of the "L" - shaped structure;

[0017] The snap block has the same shape as the second notch and is fixed at a position on one side thereof.

[0018] In a preferred embodiment of the crane rail shock pad of the present invention: the first notch is formed by connecting a plurality of right - angled grooves to form a stepped shape, and the second notch is arranged in a "C" - shaped structure at one end of the first notch;

[0019] The protrusion between two adjacent right - angled grooves and the hollow ring arranged at the other end of the first notch form a snap block.

[0020] In a preferred embodiment of the crane rail shock pad of the present invention: when the two combined bodies are in a combined state, the cross - section is of an "H" - shaped structure, bolt holes for limiting are opened on the vertical sides, and the distance between the two vertical sides forms a limiting clamping cavity.

[0021] In a preferred embodiment of the crane rail shock pad of the present invention: after the bolt holes and the limiting clamping cavity cooperate, the two combined bodies cannot displace in the third direction, thereby forming a second limiting portion.

[0022] In a preferred embodiment of the crane rail shock pad of the present invention: a toughening structure is arranged inside the combined body.

[0023] In a preferred embodiment of the crane rail shock pad of the present invention: the toughening structure adopts a wire mesh woven by wire warp and weft.

[0024] The beneficial effects of the present invention are as follows: The present invention adopts a split structure, which divides the overall stress-bearing area, resulting in fewer stress concentration points when the shock-absorbing pad is stressed, and a more uniform overall stress distribution. In combination with the connection seams, each individual combination body has a certain deformation space after being stressed, maximizing the avoidance of the problem of the shock-absorbing pad slipping out due to extrusion, ensuring the smooth movement of the crane, solving the problem of equipment damage caused by the failure or slipping out of the shock-absorbing pad, and effectively reducing the maintenance cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments of the present invention will be briefly introduced below. Obviously, the drawings described below only relate to some embodiments of the present invention and do not limit the present invention. Among them:

[0026] Figure 1 Shows a three-dimensional structure diagram of a crane rail shock-absorbing pad;

[0027] Figure 2 Shows a structural diagram of the first connection method of the first limiting part in the crane rail shock-absorbing pad;

[0028] Figure 3 Shows a structural diagram of the second connection method of the first limiting part in the crane rail shock-absorbing pad;

[0029] Figure 4 Shows a structural diagram of the third connection method of the first limiting part in the crane rail shock-absorbing pad;

[0030] Figure 5 Shows a cross-sectional view of the crane rail shock-absorbing pad. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0031] In order to enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below in conjunction with the specific embodiments and the accompanying drawings.

[0032] The terms used in the present invention are those general terms that are currently widely used in the art in consideration of the functions of the present invention, but these terms may change according to the intentions of those of ordinary skill in the art, precedents, or new technologies in the art. In addition, specific terms may be selected by the applicant, and in this case, their detailed meanings will be described in the detailed description of the present invention. Therefore, the terms used in the specification should not be understood as simple names, but based on the meanings of the terms and the overall description of the present invention.

[0033] Referring to Figure 1-2 , this embodiment provides a crane rail shock-absorbing pad, including,

[0034] At least two combination bodies 1;

[0035] Two assemblies 1 are relatively buckled and engaged in the combined state from the first direction. The assembly 1 is provided with a first limiting portion 2 to prevent the two assemblies 1 from displacing in the second direction and disengaging from the combined state, and the assembly 1 is provided with a second limiting portion 3 to prevent the two assemblies 1 from displacing in the third direction and disengaging from the combined state;

[0036] Specifically, the crane rail shock pad in the combined state is placed flat on the bottom surface of the steel rail. After being compressed, it is mutually restricted by the first limiting portion 2 and the second limiting portion 3, so that the two assemblies 1 are closer to each other;

[0037] The buckling and combination of the two assemblies 1 divide the overall stress-bearing area, so that there are fewer stress concentration points when the shock pad is stressed, and the overall stress distribution is more uniform, solving the problems of large area of the integral structure, easy occurrence of stress concentration phenomenon, especially uneven stress at the edge or local position, and permanent deformation due to loss of elasticity after long-term use, providing guarantee for the smooth walking of the crane;

[0038] At the same time, in terms of the material (rubber) performance, compared with the integral structure, the size of a single assembly 1 in the split structure is smaller, its overall deformation is relatively smaller, it can better maintain the elastic characteristics, avoid the performance decline caused by local excessive deformation, and in addition, the influence of internal defects (such as air holes, impurities, etc.) of the small-sized material on the overall performance is also relatively small.

[0039] A connecting seam 4 for energy dissipation is formed at the buckling joint of the two assemblies 1 in the combined state.

[0040] Specifically, the gap of the connecting seam 4 is 0.3 mm. When the overhead crane approaches the shock pad during driving, the force will enter from one side of one of the assemblies 1. At this time, the force received by one side of this assembly 1 is the largest, and the force will squeeze this assembly 1 to make it deformed. After deformation, its shape will expand, and the connecting seam 4 provides space for the expansion, so that the two assemblies 1 are more closely combined to form a complete shock-absorbing body. The existence of the connecting seam 4 not only provides expansion space, but also makes the compressed assembly 1 not squeeze the other assembly 1, thus avoiding the problem of extrusion and slipping out and improving the service life.

[0041] The assembly 1 is provided with a buckling groove 21 and a buckling block 22;

[0042] After the buckling groove 21 and the buckling block 22 are buckled, the two assemblies 1 cannot move reversely in the second direction, thus forming the first limiting portion 2.

[0043] The buckling groove 21 has a first notch 211 and a second notch 212 connected thereto. The first notch 211 and the second notch 212 form an "L" - shaped structure, and the buckling block 22 is adapted to the buckling groove 21 of the "L" - shaped structure.

[0044] Specifically, the snap groove 21 and the snap block 22 form a double "L" structure. When snapping, the snap grooves 21 and the snap blocks 22 of the two assemblies 1 are snap-fitted with each other. In the double "L" structure, it will be snapped more tightly through deformation during snapping, avoiding the problem of unfastening.

[0045] When the two assemblies 1 are in the combined state, the cross-section is in an "H" shape. Bolt holes 31 for limiting are provided on the vertical sides, and the distance between the two vertical sides forms a limiting clamping cavity 32. After the bolt holes 31 and the limiting clamping cavity 32 cooperate, the two assemblies 1 cannot displace in the third direction, thereby forming the second limiting portion 3.

[0046] Specifically, after the two assemblies 1 are snapped and attached to the ground of the rail, the width of the limiting clamping cavity 32 is the same as the width of the rail. Thus, the vertical sides of the two assemblies 1 can closely adhere to the outer side of the rail. Then, the whole installation is completed by inserting the anchor bolts into the bolt holes 31, so that the two assemblies 1 cannot displace in the third direction, thereby ensuring the overall firmness.

[0047] As an alternative embodiment:

[0048] Refer to Figure 3 , in an embodiment provided by the present application, the first notch 211 is in an "L" shape, and the second notch 212 is formed in a "bird's beak" shape on the surface of the "L" shape;

[0049] The snap block 22 has the same shape as the second notch 212 and is fixed at a position on one side thereof.

[0050] Specifically, the lower edge of the "bird's beak" of the snap block 22 is connected to the lower edge of the "bird's beak" of the second notch 212 to form an inverted "S" structure. An elastic hole 121 is provided on the snap block 22, and a "Tai Chi" pattern is formed after combination. When one of the assemblies 1 is subjected to force, the end that is not fixed through the bolt hole 31 will be squeezed and deformed inward. Since the middle connection part is in an inverted "S" structure, that is, the squeezed snap block 22 will rotate inward along the inverted "S" gap. After inward rotation, it can compete with another snap block 22, showing a tendency to hold together. Thus, the overall structure is connected more tightly and the force is more evenly distributed during force application and shock absorption.

[0051] Force analysis:

[0052] In the initial state

[0053] When no external force is applied, the snap block 22 and the notch 212 are closely connected through the inverted "S" structure, and the elastic hole 121 is in a natural state, and the overall structure remains stable;

[0054] The reverse “S”-shaped structure enables a certain amount of prestress to exist between the buckle block 22 and the notch 212 , which helps to enhance the integrity of the structure.

[0055] Under external force

[0056] Assume that the assembly 1 is subjected to an external force, and the end of the assembly 1 that is not fixed by the bolt hole 31 is squeezed;

[0057] Extrusion stage: external force acts on the unfixed end of the assembly 1, and the buckle block 22 is squeezed inward. Since the buckle block 22 is provided with an elastic hole 121, the existence of the elastic hole enables the buckle block 22 to be partially deformed when subjected to force, thereby absorbing part of the external force energy;

[0058] Rotational deformation stage: Since the buckle block 22 and the notch 212 are connected by an inverted "S"-shaped structure, this structural design enables the buckle block 22 to rotate inward along the inverted "S"-shaped gap after being squeezed. During the rotation process, the rotation direction of the buckle block 22 forms a certain angle with the direction of the external force, thereby decomposing the external force into a component along the rotation direction and a component perpendicular to the rotation direction;

[0059] Interaction stage: During the inward rotation process, the snap-on block 22 will interact with another adjacent snap-on block 22. This interaction is manifested as a "competition" between the snap-on blocks 22, that is, the two snap-on blocks squeeze and support each other through the reverse "S" shape structure, so that the external force can be redistributed between the two snap-on blocks 22, thereby reducing the force burden of a single snap-on block 22.

[0060] The stress effect of the overall structure

[0061] Shock absorption effect: The existence of the elastic hole 121 enables the buckle block 22 to undergo partial deformation when subjected to force, absorbs part of the external force energy, and plays a certain shock absorption role. At the same time, the rotational deformation of the reverse "S"-shaped structure can further disperse the external force and reduce the direct impact of the external force on the structure;

[0062] Enhanced structural stability: The interaction between the buckle blocks 22 enables the external force to be redistributed between the two buckle blocks 22. The clustered form makes the overall structure tighter when subjected to force. The design of the reverse "S"-shaped structure enables the buckle blocks 22 to form mutual support with adjacent buckle blocks 22 during the rotation process, thereby enhancing the overall stability of the structure;

[0063] Uniform force bearing: Through the interaction between the buckle blocks 22 and the rotational deformation of the reverse "S"-shaped structure, the external force can be evenly distributed in the entire structure, avoiding the situation of excessive local force, thereby improving the durability and reliability of the structure.

[0064] As an optional embodiment:

[0065] Reference Figure 4 Figure 4 , in an embodiment provided by the present application, the first notch 211 is formed by connecting a plurality of right-angle notches to form a stepped shape, and the second notch 212 is arranged in a "C" shape at one end of the first notch 211;

[0066] The protrusion between two adjacent right-angle notches and the hollow ring arranged at the other end of the first notch 211 form a snap block 22.

[0067] Specifically, the size of the protrusion between the right-angle notches is adapted to the number of the right-angle notches. The stepped connection method will cause the extrusion force to be released in a stepped manner, avoiding excessive pressure being applied at one time, thereby reducing the impact on the assembly 1. This method can effectively reduce the risk of permanent deformation and failure caused by instantaneous high pressure;

[0068] At the same time, the stepped force release method can enable the assembly 1 to better adapt to the stress state during the gradual loading process, avoid stress concentration, help the stress distribution of the assembly 1 to be more uniform, and thus improve the overall performance.

[0069] As an alternative embodiment:

[0070] Reference Figure 5 Figure 5 , in an embodiment provided by the present application, a toughening structure 5 is arranged inside the assembly 1.

[0071] The toughening structure 5 adopts a wire mesh woven by steel wires in longitude and latitude.

[0072] Specifically, the φ of the steel wire is 0.5 mm. The surface of the wire mesh is treated with a copper plating film to improve the adhesion to rubber. The wire mesh is provided with two layers, and it is integrally formed with the assembly 1 by hot pressing. This structure can improve the overall compressive strength of the assembly 1.

[0073] Finally, it should be pointed out that the methods and devices described in detail above are only embodiments, and those skilled in the art can modify these embodiments in different ways as long as they do not depart from the scope of the present invention.

Claims

1. A crane rail vibration damping pad, characterized in that: include, At least two combinations (1); The two assemblies (1) are relatively buckled from a first direction to enter a combined state, the assemblies (1) are provided with a first limiting portion (2) to prevent the two assemblies (1) from being displaced in a second direction and leaving the combined state, and the assemblies (1) are provided with a second limiting portion (3) to prevent the two assemblies (1) from being displaced in a third direction and leaving the combined state; A connecting seam (4) for dissipating energy is formed at the buckled joint of the two combined bodies (1) in the combined state.

2. The crane rail vibration damping pad according to claim 1, characterized in that: The assembly (1) is provided with a buckle groove (21) and a buckle block (22); After the buckling groove (21) and the buckling block (22) are buckled, the two assemblies (1) cannot move in the opposite direction along the second direction, thereby forming a first limiting portion (2).

3. The crane rail vibration damping pad according to claim 2, characterized in that: The buckle groove (21) comprises a first notch (211) and a second notch (212) communicating therewith.

4. The crane rail vibration damping pad according to claim 3, characterized in that: The first notch (211) and the second notch (212) form an "L"-shaped structure; The buckle block (22) is adapted to the buckle groove (21) of the "L"-shaped structure.

5. The crane rail vibration damping pad according to claim 3, characterized in that: The first notch (211) is an "L"-shaped structure, and the second notch (212) is in a "bird's beak" shape and is opened on the surface of the "L"-shaped structure; The buckle block (22) is consistent in shape with the second notch (212) and is fixed at a position on one side thereof.

6. The crane rail vibration damping pad according to claim 3, characterized in that: The first notch (211) is formed by connecting a plurality of right-angled grooves to form a stepped shape, and the second notch (212) is arranged at one end of the first notch (211) in a "C"-shaped structure; The protrusion between two adjacent right-angle grooves and the hollow ring arranged at the other end of the first notch (211) form a buckle block (22).

7. The crane rail vibration damping pad according to claim 1, characterized in that: When the two assemblies (1) are in an assembled state, the cross section presents an "H"-shaped structure, a bolt hole (31) for limiting is provided on the vertical side thereof, and the spacing between the two vertical sides forms a limiting clamping cavity (32).

8. The crane rail vibration damping pad according to claim 7, characterized in that: The bolt hole (31) cooperates with the limiting clamping cavity (32) so that the two assemblies (1) cannot move in a third direction, thereby forming a second limiting portion (3).

9. The crane rail vibration damping pad according to claim 1, characterized in that: A toughening structure (5) is arranged inside the assembly (1).

10. The crane rail vibration damping pad according to claim 9, characterized in that: The toughening structure (5) is a steel wire mesh woven with steel wires in warp and weft.

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