Shipbuilding gantry crane skew protection device

Abstract

This invention discloses a skew protection device for a shipbuilding gantry crane. The device includes a lower connecting seat, a fork, a connecting rod support assembly, a connecting rod assembly, a pointer, a pointer support slide, a dial, and a limit switch. One end of the fork is rotatably mounted on the connecting seat. One end of the connecting rod assembly is rotatably connected to the fork. The connecting rod support assembly supports the connecting rod assembly. The pointer is rotatably mounted on the other end of the connecting rod assembly. The pointer support slide supports the pointer's sliding motion. The dial is located at the front of the pointer to display the pointer's deflection angle. The limit switch is located on the dial to indicate the skew angle. This invention collects rotational motion and filters out forward / backward and left / right tilting motions, avoiding interference and effectively improving the crane's safety.

Description

Technical Field

[0001] This invention belongs to the technical field of shipbuilding gantry cranes, and particularly relates to a skew protection device for shipbuilding gantry cranes. Background Technology

[0002] Shipbuilding gantry cranes are gantry cranes specifically designed for shipbuilding and are installed on slipways. Due to the large span of the crane, the rigid and flexible legs are prone to skewness during operation. To ensure safety, a skew protection device is usually installed between the main beam and the flexible leg.

[0003] Traditional skew protection devices such as Figure 1 As shown, the system includes a fork 100, a limit switch 200, a lever 300, and a fixed shaft 400. When the crane's main beam tilts, the lever mounted on the main beam shifts, causing the fork to rotate around the fixed shaft. When the fork head touches the corresponding limit switch, the limit switch sends a signal, and the operator corrects the tilt by adjusting the traveling mechanism. This ensures the crane operates safely within a certain range of main beam tilt during operation. In actual use, the forward, backward, left, and right tilting of the main beam significantly impacts the tilt protection device, preventing it from achieving its intended protective function. It often fails to activate when the tilt value is reached or misactivates before reaching the tilt value, negatively affecting its use. Summary of the Invention

[0004] To at least partially solve the technical problems existing in the prior art, the present invention provides a skew protection device for shipbuilding gantry cranes.

[0005] The shipbuilding gantry crane skew protection device of the present invention includes a lower connecting seat, a fork, a connecting rod support assembly, a connecting rod assembly, a pointer, a pointer support slide, a dial, and a limit switch. One end of the fork is rotatably mounted on the connecting seat, one end of the connecting rod assembly is rotatably connected to the fork, the connecting rod support assembly supports the connecting rod assembly, the pointer is rotatably mounted on the other end of the connecting rod assembly, the pointer support slide supports the pointer sliding, the dial is located at the front end of the pointer to display the pointer deflection angle, and the limit switch is located on the dial to remind the user of the deflection angle.

[0006] The fork includes a front fork, a rear fork, and a spherical boss. The front fork is rotatably connected to the rear fork, and the spherical boss is disposed at the rear end of the rear fork.

[0007] The linkage assembly includes a first linkage, an amplifying linkage, and a second linkage, wherein the first linkage and the amplifying linkage are rotatably connected, and the second linkage and the amplifying linkage are rotatably connected.

[0008] The linkage support assembly includes a first support column, a second support column, a third support column, and an amplifying rod support slide. The first support column supports the fork, the second support column supports the amplifying rod, the third support column supports the pointer, and the amplifying rod support slide supports the sliding of the amplifying rod.

[0009] Furthermore, in the aforementioned shipbuilding gantry crane skew protection device, a spherical groove is provided at the front end of the lower connecting seat, the spherical groove is matched with the spherical boss, and the spherical boss and the spherical groove are rotatably connected.

[0010] Furthermore, in the aforementioned shipbuilding gantry crane skew protection device, the front end of the front fork is provided with a fork connection hole and a fork support hole, the rear end of the front fork is provided with a fork rotating hole, and the front end of the rear fork is provided with a fork rotating shaft. The fork rotating shaft matches the fork rotating hole and is inserted into the fork rotating hole for rotational connection.

[0011] Furthermore, in the above-mentioned shipbuilding gantry crane skew protection device, the top diameter of the first support column matches the diameter of the fork support hole, the first support column is inserted into the fork support hole, and the front end of the fork is rotatably connected to the first support column.

[0012] Furthermore, in the above-mentioned shipbuilding gantry crane skew protection device, the first connecting rod is symmetrically provided with first connecting holes at both ends, one end of which is connected to the shaft of the fork connecting hole.

[0013] The amplifying rod is symmetrically provided with second connecting holes at both ends, wherein the second connecting hole at one end is connected to the first connecting hole at the other end via a rotating shaft;

[0014] The second connecting rod has symmetrical third connecting holes at both ends, wherein one of the third connecting holes is connected to the second connecting hole at the other end via a rotating shaft;

[0015] The pointer is provided with a pointer connection hole at the tail end, and the third connection hole at the other end is connected to the pointer connection hole shaft.

[0016] Furthermore, in the above-mentioned shipbuilding gantry crane skew protection device, the front end of the amplifying rod is provided with an amplifying rod support hole, the top diameter of the second support column matches the diameter of the amplifying rod support hole, the second support column is inserted into the amplifying rod support hole, and the front end of the amplifying rod is rotatably connected to the second support column;

[0017] The amplifying rod support slide is located at the rear end of the amplifying rod, and the amplifying rod is slidably connected to the amplifying rod support slide.

[0018] Furthermore, in the above-mentioned shipbuilding gantry crane skew protection device, the rear end of the pointer is provided with a pointer support hole, the top diameter of the third support column matches the diameter of the pointer support hole, the third support column is inserted into the pointer support hole, and the rear end of the pointer is rotatably connected to the third support column;

[0019] The pointer support slide is disposed at the front end of the pointer, and the pointer is slidably connected to the pointer support slide.

[0020] Furthermore, in the aforementioned shipbuilding gantry crane skew protection device, the fork, the first connecting rod, the amplifying rod, the second connecting rod, and the pointer are arranged on the same horizontal plane.

[0021] Furthermore, in the aforementioned shipbuilding gantry crane skew protection device, the dial is provided with skew markings.

[0022] Furthermore, in the aforementioned shipbuilding gantry crane skew protection device, the limit switches are symmetrically arranged on the dial, corresponding to the moderate skew scale and the severe skew scale.

[0023] The shipbuilding gantry crane skew protection device of the present invention has the following advantages and beneficial effects:

[0024] This invention only collects rotational motion, filtering out forward and backward tilting and left and right tilting motions to avoid interference, ensuring reliable signals and safeguarding the safe operation of the crane; at the same time, it has a visual dial that allows for intuitive data collection and real-time monitoring of crane tilt information, providing reliable data for safe operation. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only for further understanding of the embodiments of the present invention and constitute a part of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. In the drawings:

[0026] Figure 1 This is a structural schematic diagram of a skew protection device for a shipbuilding gantry crane in the prior art.

[0027] Figure 2 This is a front view of the shipbuilding gantry crane skew protection device of the present invention;

[0028] Figure 3 This is a top view of the shipbuilding gantry crane skew protection device of the present invention;

[0029] Figure 4 For along Figure 3 The cross-sectional view of AA shows the magnified rod of the shipbuilding gantry crane skew protection device of the present invention;

[0030] Figure 5 For along Figure 3 The cross-sectional view of AA shows the pointer of the shipbuilding gantry crane skew protection device of the present invention;

[0031] Figure 6 This is a schematic diagram of the installation structure of the shipbuilding gantry crane skew protection device of the present invention.

[0032] Explanation of reference numerals in the attached figures:

[0033] 100: Shift fork, 200: Limit switch, 300: Lever, 400: Fixed shaft;

[0034] 1: Lower connecting seat; 11: Spherical groove;

[0035] 2: Pulling out the fork;

[0036] 21: Front fork; 211: Fork connecting hole; 212: Fork support hole; 213: Fork turning hole;

[0037] 22: Rear section fork; 221: Spherical boss; 222: Fork pivot;

[0038] 3: Linkage support assembly; 31: First support column; 32: Second support column; 33: Third support column; 34: Amplifying rod support slide;

[0039] 4: Linkage assembly;

[0040] 41: First connecting rod; 411: First connecting hole;

[0041] 42: Amplifying rod; 421: Second connecting hole; 422: Amplifying rod support hole;

[0042] 43: Second connecting rod; 431: Third connecting hole;

[0043] 5: Pointer; 51: Pointer connection hole; 52: Pointer support hole;

[0044] 6: Pointer support slide;

[0045] 7: Dial;

[0046] 8: Limit switches;

[0047] 10: Main beam; 20: Flexible leg; 30: Flexible hinge. Detailed Implementation

[0048] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0049] like Figures 2 to 5 As shown, the shipbuilding gantry crane skew protection device of the present invention includes a lower connecting seat 1, a fork 2, a connecting rod support assembly 3, a connecting rod assembly 4, a pointer 5, a pointer support slide 6, a dial 7, and a limit switch 8. One end of the fork 2 is rotatably mounted on the connecting seat, one end of the connecting rod assembly 4 is rotatably connected to the fork 2, the connecting rod support assembly 3 supports the connecting rod assembly 4, the pointer 5 is rotatably mounted on the other end of the connecting rod assembly 4, the pointer support slide 6 supports the sliding of the pointer 5, the dial 7 is located at the front end of the pointer 5 to display the offset angle of the pointer 5, and the limit switch 8 is located on the dial 7 to remind of the skew angle.

[0050] The fork 2 includes a front fork 21, a rear fork 22 and a spherical boss 221. The front fork 21 and the rear fork 22 are rotatably connected, and the spherical boss 221 is located at the rear end of the rear fork 22.

[0051] Linkage assembly 4 includes a first link 41, an amplifying link 42, and a second link 43, wherein the first link 41 and the amplifying link 42 are rotatably connected, and the second link 43 and the amplifying link 42 are rotatably connected.

[0052] The linkage support assembly 3 includes a first support column 31, a second support column 32, a third support column 33, and an amplifying rod support slide 34. The first support column 31 is supported on the shift fork 2, the second support column 32 is supported on the amplifying rod 42, the third support column 33 is supported on the pointer 5, and the amplifying rod support slide 34 supports the sliding of the amplifying rod 42.

[0053] Furthermore, in the shipbuilding gantry crane skew protection device of the present invention, a spherical groove 11 is provided at the front end of the lower connecting seat 1. The spherical groove 11 matches the spherical boss 221. The spherical boss 221 and the spherical groove 11 are rotatably connected, thereby effectively ensuring that the forward and backward tilting movement of the lower connecting seat 1 and the fork 2 can be transmitted to the connecting rod assembly 4, while the left and right tilting movement of the lower connecting seat 1 and the fork 2 will not be transmitted to the connecting rod assembly 4.

[0054] Furthermore, in the shipbuilding gantry crane skew protection device of the present invention, the front end of the front fork 21 is provided with a fork connecting hole 211 and a fork support hole 212, the rear end of the front fork 21 is provided with a fork rotating hole 213, and the front end of the rear fork is provided with a fork rotating shaft 222. The fork rotating shaft 222 is matched with the fork rotating hole 213, and the fork rotating shaft 222 is inserted into the fork rotating hole 213 for rotational connection, thereby effectively ensuring that the forward and backward tilting motion generated by the fork 2 itself will not be transmitted to the connecting rod assembly 4, but only to the rotational motion generated by itself.

[0055] Furthermore, in the shipbuilding gantry crane skew protection device of the present invention, the top diameter of the first support column 31 matches the diameter of the fork support hole 212, the first support column 31 is inserted into the fork support hole 212, and the front end of the fork is rotatably connected to the first support column 31, thereby effectively ensuring that one end of the fork 2 can rotate around the first support column 31.

[0056] Furthermore, in the shipbuilding gantry crane skew protection device of the present invention, the first connecting rod 41 is symmetrically provided with first connecting holes 411 at both ends, one end of the first connecting hole 411 is connected to the rotating shaft of the fork connecting hole 211, thereby effectively ensuring the rotational connection between the fork 2 and the connecting rod assembly 4.

[0057] The amplifying rod 42 has symmetrical second connecting holes 421 at both ends, one of which is connected to the first connecting hole 411 at the other end via a rotating shaft;

[0058] The second connecting rod 43 has symmetrical third connecting holes 431 at both ends, one of which is connected to the second connecting hole 421 at the other end via a rotating shaft;

[0059] The pointer 5 is provided with a pointer connection hole 51 at its tail end, and the third connection hole 431 at the other end is connected to the pointer connection hole 51 by a rotating shaft, thereby effectively ensuring the rotational connection between the connecting rod assembly 4 and the pointer 5.

[0060] Furthermore, in the shipbuilding gantry crane skew protection device of the present invention, the front end of the amplifying rod 42 is provided with an amplifying rod support hole 422, the top diameter of the second support column 32 matches the diameter of the amplifying rod support hole 422, the second support column 32 is inserted into the amplifying rod support hole 422, and the front end of the amplifying rod 42 is rotatably connected to the second support column 32.

[0061] The amplifying rod support slide 34 is located at the rear end of the amplifying rod 42. The amplifying rod 42 is slidably connected to the amplifying rod support slide 34, thereby effectively amplifying the rotational motion of the other end of the amplifying rod 42 when one end of the amplifying rod 42 rotates around the second support column 32.

[0062] Furthermore, in the shipbuilding gantry crane skew protection device of the present invention, a pointer support hole 52 is provided at the rear end of the pointer 5, the top diameter of the third support column 33 matches the diameter of the pointer support hole 52, the third support column 33 is inserted into the pointer support hole 52, and the rear end of the pointer 5 is rotatably connected to the third support column 33.

[0063] The pointer support slide 6 is located at the front end of the pointer 5. The pointer 5 is slidably connected to the pointer support slide 6, which effectively ensures that when the rear end of the pointer 5 rotates around the third support group, the front end of the pointer 5 swings on the pointer support slide 6.

[0064] Furthermore, in the shipbuilding gantry crane skew protection device of the present invention, the fork 2, the first connecting rod 41, the amplifying rod 42, the second connecting rod 43 and the pointer 5 are arranged on the same horizontal plane.

[0065] Furthermore, in the shipbuilding gantry crane skew protection device of the present invention, the dial 7 is provided with a skew scale, so that data information can be collected intuitively.

[0066] Furthermore, in the shipbuilding gantry crane skew protection device of the present invention, the limit switches 8 are symmetrically arranged on the dial 7 to correspond to the moderate skew scale and the severe skew scale, so as to effectively monitor through the limit switches 8 and provide alarm reminders based on the moderate and severe skew data respectively.

[0067] Specifically, such as Figure 6 As shown, due to factors such as skewed operation, load, and temperature changes, the main beam 10 will undergo a combination of forward and backward tilting, left and right tilting, and rotation relative to the flexible leg 20. During the installation of the shipbuilding gantry crane skew protection device of the present invention, it is necessary to fix the lower connecting seat 1 on the flexible hinge 30 opposite to the flexible leg 20, and fix the connecting rod support assembly 3, the pointer support slide 6, and the scale plate on the main beam 10. When tilting occurs, the spherical boss 221 and the spherical groove 11 cooperate to filter the left and right tilting motion, transmitting only the forward and backward tilting motion. When the fork 2 itself tilts, the fork pivot 222 and the fork pivot hole 213 cooperate to filter the forward and backward tilting motion, transmitting only the rotational motion. When the fork 2 transmits tilting motion to the connecting rod assembly 4, the front fork 21 rotates horizontally around the first support column 31, pulling the amplifying rod 42 through the first connecting rod 41. At this time, one end of the amplifying rod 42 rotates horizontally around the second support column 32, causing the other end to slide on the amplifying rod support slide 34, thereby amplifying the rotational effect. When the amplifying rod 42 slides, the second connecting rod 43 pulls the pointer 5 to rotate horizontally around the third support column 33, causing the pointer tip to slide on the pointer support slide 6. The rotation angle is collected by the scale 7. When the rotation angle deviates moderately or severely, the limit switch 8 is triggered, thereby alerting the operator.

[0068] In summary, compared with the prior art, the shipbuilding gantry crane skew protection device of the present invention has the following advantages and beneficial effects: the invention only collects rotational motion, filters out forward and backward tilting and left and right tilting motion, avoids interference, and provides reliable signals, thus safeguarding the safe operation of the crane; at the same time, it has a visual dial, which can intuitively collect data information and understand the crane skew information in real time, providing reliable data for safe operation.

[0069] It should be noted that, unless otherwise expressly specified and limited, the term "connection" or its synonyms should be interpreted broadly in this document. For example, "connection" can be a fixed connection or a detachable connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal communication of two elements or the interaction between two elements. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances. Furthermore, expressions such as "first" and "second" are merely used to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Meanwhile, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. In addition, the terms "front," "rear," "left," "right," "upper," and "lower" in this document refer to the placement states shown in the accompanying drawings.

[0070] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A skew protection device for a shipbuilding gantry crane, characterized in that, The shipbuilding gantry crane skew protection device includes a lower connecting seat, a fork, a connecting rod support assembly, a connecting rod assembly, a pointer, a pointer support slide, a dial, and a limit switch. One end of the fork is rotatably mounted on the connecting seat. One end of the connecting rod assembly is rotatably connected to the fork. The connecting rod support assembly supports the connecting rod assembly. The pointer is rotatably mounted on the other end of the connecting rod assembly. The pointer support slide supports the pointer's sliding motion. The dial is located at the front end of the pointer to display the pointer's deflection angle. The limit switch is located on the dial to provide a warning of the deflection angle. The fork includes a front fork, a rear fork, and a spherical boss. The front fork is rotatably connected to the rear fork, and the spherical boss is disposed at the rear end of the rear fork. The linkage assembly includes a first linkage, an amplifying linkage, and a second linkage, wherein the first linkage and the amplifying linkage are rotatably connected, and the second linkage and the amplifying linkage are rotatably connected. The linkage support assembly includes a first support column, a second support column, a third support column, and an amplifying rod support slide. The first support column supports the fork, the second support column supports the amplifying rod, the third support column supports the pointer, and the amplifying rod support slide supports the sliding of the amplifying rod.

2. The shipbuilding gantry crane skew protection device according to claim 1, characterized in that, The lower connecting seat has a spherical groove at its front end, which matches the spherical boss, and the spherical boss and the spherical groove are rotatably connected.

3. The shipbuilding gantry crane skew protection device according to claim 1, characterized in that, The front end of the fork is provided with a fork connection hole and a fork support hole, the rear end of the front fork is provided with a fork rotating hole, and the front end of the rear fork is provided with a fork rotating shaft. The fork rotating shaft is matched with the fork rotating hole and is inserted into the fork rotating hole for rotational connection.

4. The shipbuilding gantry crane skew protection device according to claim 3, characterized in that, The top diameter of the first support column matches the diameter of the fork support hole. The first support column is inserted into the fork support hole, and the front end of the fork is rotatably connected to the first support column.

5. The shipbuilding gantry crane skew protection device according to claim 3, characterized in that: The first connecting rod has first connecting holes symmetrically arranged at both ends, and one end of the first connecting hole is connected to the pivot of the fork connecting hole. The amplifying rod is symmetrically provided with second connecting holes at both ends, wherein the second connecting hole at one end is connected to the first connecting hole at the other end via a rotating shaft; The second connecting rod has symmetrical third connecting holes at both ends, wherein one of the third connecting holes is connected to the second connecting hole at the other end via a rotating shaft; The pointer is provided with a pointer connection hole at the tail end, and the third connection hole at the other end is connected to the pointer connection hole shaft.

6. The shipbuilding gantry crane skew protection device according to claim 1, characterized in that, The amplifying rod has an amplifying rod support hole at its front end. The top diameter of the second support column matches the diameter of the amplifying rod support hole. The second support column is inserted into the amplifying rod support hole, and the front end of the amplifying rod is rotatably connected to the second support column. The amplifying rod support slide is located at the rear end of the amplifying rod, and the amplifying rod is slidably connected to the amplifying rod support slide.

7. The shipbuilding gantry crane skew protection device according to claim 1, characterized in that, The pointer has a pointer support hole at its rear end, the top diameter of the third support column matches the diameter of the pointer support hole, the third support column is inserted into the pointer support hole, and the rear end of the pointer is rotatably connected to the third support column; The pointer support slide is disposed at the front end of the pointer, and the pointer is slidably connected to the pointer support slide.

8. The shipbuilding gantry crane skew protection device according to claim 1, characterized in that, The fork, the first connecting rod, the amplifying rod, the second connecting rod, and the pointer are arranged on the same horizontal plane.

9. The shipbuilding gantry crane skew protection device according to claim 1, characterized in that, The dial is provided with skewed graduations.

10. The shipbuilding gantry crane skew protection device according to claim 9, characterized in that, The limit switches are symmetrically arranged on the dial, corresponding to the medium and severe deviation scales.

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