A support leg structure of a portal crane

Abstract

The utility model provides a kind of support leg structure of portal crane, including bottom beam, the both ends of bottom beam are symmetrically slidably sleeved with sliding sleeve, the top of bottom beam is centrally vertically fixed and is provided with fixed tube, the inside of the upper end of fixed tube is slidably provided with lifting rod, the top end of lifting rod is vertically fixed and is provided with roof beam, the both ends of roof beam are hingedly connected with inclined strut assembly, the end of inclined strut assembly, which is away from roof beam, is hingedly connected with the top of sliding sleeve;One side of bottom beam is provided with fine adjustment mechanism for driving two sliding sleeves to synchronously approach or move away from each other;In the utility model, fine adjustment mechanism drives two sliding sleeves to synchronously approach or move away from each other, sliding sleeve drives the lower end of two inclined strut assemblies to synchronously approach or move away from each other, the length of inclined strut assembly does not change, the upper end of two inclined strut assemblies drives roof beam to move up or down, which realizes the height of crane crossbeam on its top to be slightly adjusted.

Description

Technical Field

[0001] This utility model belongs to the field of crane technology, specifically relating to a leg structure for a gantry crane. Background Technology

[0002] Gantry cranes are a type of bridge crane, also known as portal cranes. They are mainly used for loading and unloading cargo and bulk materials in outdoor freight yards and material yards. Gantry cranes have the characteristics of high site utilization, large operating range, wide adaptability and strong versatility, and are widely used in port freight yards.

[0003] In the prior art, Chinese utility model patent document with authorization announcement number CN222665189U discloses a gantry crane outrigger, which can adjust the height of the moving rod according to the needs of moving objects. The moving adjustment hole on the moving rod is aligned with the fixed adjustment hole and the fixed plate adjustment hole on the fixed rod, and the moving rod is fixed inside the fixed rod by adjusting bolts. The different moving adjustment holes are fixed together by bolts to realize the height adjustment of the outrigger. The minimum adjustment height is the distance between two moving adjustment holes, and it cannot realize fine adjustment of the outrigger height.

[0004] Therefore, a gantry crane outrigger structure capable of fine-tuning the outrigger height is needed to solve the current technical problems. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a gantry crane outrigger structure capable of fine-tuning the outrigger height.

[0006] The technical solution of this utility model is as follows: a leg structure for a gantry crane, including a bottom beam, with sliding sleeves symmetrically slidably fitted at both ends of the bottom beam, a fixed tube vertically fixedly installed at the center of the top of the bottom beam, a lifting rod slidably installed inside the upper end of the fixed tube, a top beam vertically fixedly installed at the top end of the lifting rod, and diagonal bracing assemblies hinged at both ends of the top beam, with one end of the diagonal bracing assembly facing away from the top beam hinged to the top of the sliding sleeve; a fine-tuning mechanism is provided on one side of the bottom beam to drive the two sliding sleeves to move closer or further apart synchronously.

[0007] Furthermore, the fine-tuning mechanism has a movable seat fixedly disposed on one side of the sliding sleeve, and a bidirectional screw parallel to it is rotatably disposed on one side of the bottom beam. The two ends of the bidirectional screw have two external threads with opposite helical directions, and the movable seat is threadedly connected to the bidirectional screw.

[0008] Furthermore, a support is fixedly installed in the center of one side of the bottom beam, and the middle part of the bidirectional screw is rotatably installed inside the support. Limit blocks are fixedly installed at both ends of the bidirectional screw, and a fine-tuning hexagonal prism is fixedly installed in the center of the end of the limit block opposite to the bidirectional screw.

[0009] Furthermore, the diagonal bracing assembly has a diagonal bracing tube, and a diagonal bracing rod is slidably fitted inside one end of the diagonal bracing tube. The end of the diagonal bracing rod opposite to the diagonal bracing tube is hinged to the end of the top beam, and the end of the diagonal bracing tube opposite to the diagonal bracing rod is hinged to the top of the sliding sleeve. Adjustment holes are evenly provided on the diagonal bracing rod, and a bolt and nut mechanism corresponding to the adjustment holes is provided at the end of the diagonal bracing tube.

[0010] Furthermore, two fixed tubes are arranged parallel to each other at the center of the top of the bottom beam, and an adjusting support mechanism is provided between the upper ends of the two fixed tubes. The upper end of the adjusting support mechanism abuts against the bottom of the top beam.

[0011] Furthermore, the adjusting support mechanism has a threaded pipe fixedly disposed between the upper ends of the two fixed pipes, and a support screw is threadedly connected inside the threaded pipe. The upper end of the support screw is rotatably disposed with a support plate that abuts against the bottom of the top beam.

[0012] Furthermore, support plates are fixedly installed at both the upper and lower ends of the threaded tube, and the two ends of the support plates are respectively fixedly connected to the sides of the two fixed tubes.

[0013] Furthermore, a supporting hexagonal prism is provided at the lower end of the supporting screw.

[0014] Furthermore, a bracket is fixedly installed at the center of the top of the top beam.

[0015] Furthermore, mounting bases are fixedly provided at the bottom of both ends of the bottom beam.

[0016] The beneficial effects of this utility model are:

[0017] (1) In this utility model, the fine adjustment mechanism drives the two sliding sleeves to move closer or further apart synchronously, and the sliding sleeves drive the lower ends of the two diagonal bracing components to move closer or further apart synchronously. The length of the diagonal bracing components remains unchanged, and the upper ends of the two diagonal bracing components drive the top beam to move up or down, thereby realizing the fine adjustment of the height of the crane beam at its top.

[0018] (2) When adjusting the height of the top beam, the bottom of the top beam slides inside the fixed tube at the top of the bottom beam through the lifting rod. The fixed tube cooperates with the lifting rod to restrict the lifting rod to move up and down only during adjustment, thus ensuring the stability of the top beam. Attached Figure Description

[0019] Figure 1This is one of the structural schematic diagrams of the outrigger structure of the gantry crane in this utility model.

[0020] Figure 2 This is the second schematic diagram of the support leg structure of the gantry crane in this utility model. Detailed Implementation

[0021] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. The descriptions of the exemplary embodiments are merely illustrative and are not intended to limit the present invention or its application or use in any way. The present invention can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are provided to make the present invention thorough and complete, and to fully express the scope of the present invention to those skilled in the art. It should be noted that, unless otherwise specifically stated, the relative arrangement of components and steps, the composition of materials, numerical expressions, and values ​​set forth in these embodiments should be interpreted as merely exemplary and not as limiting.

[0022] The terms "first," "second," and similar words used in this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different parts. Words such as "including" or "comprising" mean that the element preceding the word encompasses the element listed after it, and do not exclude the possibility of encompassing other elements as well. Terms such as "upper," "lower," "left," and "right" are only used to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0023] like Figure 1 and 2 As shown, a leg structure for a gantry crane is disclosed, including a bottom beam 1. Sliding sleeves 7 are symmetrically slidably fitted at both ends of the bottom beam 1. A fixed tube 4 is vertically fixed at the center of the top of the bottom beam 1. A lifting rod 5 is slidably installed inside the upper end of the fixed tube 4. A top beam 2 is vertically fixed at the top of the lifting rod 5. Diagonal bracing assemblies 6 are hinged to both ends of the top beam 2. One end of the diagonal bracing assembly 6, facing away from the top beam 2, is hinged to the top of the sliding sleeves 7. A fine-tuning mechanism 8 is provided on one side of the bottom beam 1 to drive the two sliding sleeves 7 to move closer or further apart synchronously. In this embodiment, the fine-tuning mechanism 8... The adjusting mechanism 8 drives the two sliding sleeves 7 to move closer or further apart synchronously. The sliding sleeves 7 drive the lower ends of the two diagonal brace assemblies 6 to move closer or further apart synchronously. The length of the diagonal brace assemblies 6 remains unchanged. The upper ends of the two diagonal brace assemblies 6 drive the top beam 2 to move up or down, thus realizing a small adjustment of the height of the crane beam at its top. When adjusting the height of the top beam 2, the bottom of the top beam 2 slides inside the fixed tube 4 at the top of the bottom beam 1 through the lifting rod 5. The fixed tube 4 cooperates with the lifting rod 5 to restrict the lifting rod 5 to move up and down only during adjustment, thus ensuring the stability of the top beam 2.

[0024] In some embodiments, as a specific implementation of the fine-tuning mechanism 8, the fine-tuning mechanism 8 has a movable seat 85 fixedly disposed on one side of the sliding sleeve 7, and a bidirectional screw 82 rotatably disposed on one side of the bottom beam 1 parallel to it. The two ends of the bidirectional screw 82 have two external threads with opposite helical directions. The movable seat 85 is threadedly connected to the bidirectional screw 82. When the bidirectional screw 82 is rotated, the thread structure between the bidirectional screw 82 and the movable seat 85 drives the two movable seats 85 to move the two sliding sleeves 7 synchronously closer or further apart, thereby realizing the fine-tuning of the height of the top beam 2.

[0025] In some embodiments, a support 81 is fixedly provided in the center of one side of the bottom beam 1, and the middle part of the bidirectional screw 82 is rotatably disposed inside the support 81. The support 81 provides rotational support for the bidirectional screw 82. Limiting blocks 83 are fixedly provided at both ends of the bidirectional screw 82. The limiting blocks 83 play a limiting and blocking role for the movable seat 85, preventing the limiting blocks 83 from disengaging from the bidirectional screw 82. A fine-tuning hexagonal prism 84 is fixedly provided in the center of the end of the limiting block 83 that is away from the bidirectional screw. The fine-tuning hexagonal prism 84 is easy to clamp with a wrench, so as to rotate and adjust the bidirectional screw 82.

[0026] In some embodiments, the diagonal bracing assembly 6 has a diagonal bracing tube 61, with a diagonal bracing rod 62 slidably fitted inside one end of the diagonal bracing tube 61. The end of the diagonal bracing rod 62 facing away from the diagonal bracing tube 61 is hinged to the end of the top beam 2, and the end of the diagonal bracing tube 61 facing away from the diagonal bracing rod 62 is hinged to the top of the sliding sleeve 7. Adjustment holes 63 are evenly provided on the diagonal bracing rod 61, and a bolt and nut mechanism 64 corresponding to the adjustment holes 63 is provided at the end of the diagonal bracing tube 61. The bolt and nut mechanism 64 locks the diagonal bracing rod 62 and the diagonal bracing tube 61 with different adjustment holes 63, which can change the length of the diagonal bracing assembly 6, thereby causing a significant change in the height of the top beam 2. With the fine-tuning mechanism 8 for fine-tuning the height of the top beam 2, this support structure can provide a variety of different support heights.

[0027] In some embodiments, two fixed pipes 4 are arranged parallel to each other at the center of the top of the bottom beam 1, and an adjusting support mechanism 9 is arranged between the upper ends of the two fixed pipes 4. The upper end of the adjusting support mechanism 9 abuts against the bottom of the top beam 2. The adjusting support mechanism 9 provides support to the bottom of the top beam 2, thereby improving the load-bearing capacity of the top beam 2.

[0028] In some embodiments, the adjusting support mechanism 9 has a threaded pipe 91 fixedly disposed between the upper ends of two fixed pipes 4. The threaded pipe 91 is internally threaded with a support screw 92. The upper end of the support screw 92 is rotatably disposed with a support plate 94 that abuts against the bottom of the top beam 2. When the support screw 92 is rotated, the threaded structure between the support screw 92 and the threaded pipe 91 can drive the support screw 92 to move up and down, so that the support plate 94 at the upper end of the support screw 92 abuts against the bottom of the top beam 2, providing support for the bottom of the adjusted top beam 2.

[0029] In some embodiments, support plates 95 are fixedly provided at both the upper and lower ends of the threaded pipe 91, and the two ends of the support plates 95 are respectively fixedly connected to the sides of the two fixed pipes 4.

[0030] In some embodiments, a supporting hexagonal prism 93 is provided at the lower end of the supporting screw 92. The supporting hexagonal prism 93 can be clamped and fixed by a wrench to facilitate the rotational adjustment of the supporting screw 92.

[0031] In some embodiments, a bracket 3 is fixedly provided at the center of the top of the top beam 2, and the top of the bracket 3 is assembled and fixed to the end of the crane beam by bolts.

[0032] In some embodiments, mounting bases 11 are fixedly provided at the bottom of both ends of the bottom beam 1, and the bottom of the mounting bases 11 is used to assemble and fix the casters.

[0033] The various embodiments of this utility model have now been described in detail. To avoid obscuring the concept of this utility model, some details known in the art have not been described. Those skilled in the art can fully understand how to implement the technical solutions disclosed herein based on the above description.

[0034] The embodiments described above only illustrate some implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A leg structure for a gantry crane, characterized in that: The device includes a bottom beam, with sliding sleeves symmetrically slidably fitted at both ends. A fixed tube is vertically fixed at the center of the top of the bottom beam, and a lifting rod is slidably installed inside the upper end of the fixed tube. A top beam is vertically fixed at the top of the lifting rod, and diagonal bracing assemblies are hinged to both ends of the top beam. One end of the diagonal bracing assembly opposite to the top beam is hinged to the top of the sliding sleeve. A fine-tuning mechanism is provided on one side of the bottom beam to drive the two sliding sleeves to move closer or further apart synchronously.

2. The leg structure of the gantry crane according to claim 1, characterized in that: The fine-tuning mechanism has a movable seat fixedly mounted on one side of the sliding sleeve, and a bidirectional screw parallel to it is rotatably mounted on one side of the bottom beam. The two ends of the bidirectional screw have two external threads with opposite helical directions, and the movable seat is threadedly connected to the bidirectional screw.

3. The leg structure of the gantry crane according to claim 2, characterized in that: A support is fixedly installed in the center of one side of the bottom beam. The middle part of the bidirectional screw is rotatably installed inside the support. Limit blocks are fixedly installed at both ends of the bidirectional screw. A fine-tuning hexagonal prism is fixedly installed in the center of the limit block at the end opposite to the bidirectional screw.

4. The leg structure of the gantry crane according to claim 1, characterized in that: The diagonal bracing assembly has a diagonal bracing tube, and a diagonal bracing rod is slidably fitted inside one end of the diagonal bracing tube. The end of the diagonal bracing rod opposite to the diagonal bracing tube is hinged to the end of the top beam, and the end of the diagonal bracing tube opposite to the diagonal bracing rod is hinged to the top of the sliding sleeve. Adjustment holes are evenly provided on the diagonal bracing rod, and a bolt and nut mechanism corresponding to the adjustment holes is provided at the end of the diagonal bracing tube.

5. The leg structure of the gantry crane according to claim 1, characterized in that: Two fixed tubes are arranged parallel to each other in the center of the top of the bottom beam. An adjusting support mechanism is arranged between the upper ends of the two fixed tubes. The upper end of the adjusting support mechanism abuts against the bottom of the top beam.

6. The leg structure of the gantry crane according to claim 5, characterized in that: The adjusting support mechanism has a threaded pipe fixedly disposed between the upper ends of the two fixed pipes, and a support screw is threadedly connected inside the threaded pipe. The upper end of the support screw is rotatably disposed with a support plate that abuts against the bottom of the top beam.

7. The leg structure of the gantry crane according to claim 6, characterized in that: Both ends of the threaded tube are fixedly provided with support plates, and the two ends of the support plates are respectively fixedly connected to the sides of the two fixed tubes.

8. The leg structure of the gantry crane according to claim 6, characterized in that: The lower end of the support screw is provided with a support hexagonal prism.

9. The leg structure of the gantry crane according to claim 1, characterized in that: A bracket is fixedly installed at the center of the top of the top beam.

10. The leg structure of the gantry crane according to claim 1, characterized in that: Mounting bases are fixedly installed at both ends of the bottom of the bottom beam.

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