Crawler crane and anti-tilting automatic adjusting device for crawler crane

Abstract

The utility model discloses a crawler crane and an anti-tilting automatic adjusting device for the crawler crane, and the anti-tilting automatic adjusting device comprises a supporting rod assembly hinged to a first top section, a supporting seat arranged at the top of a variable-amplitude fly jib, a limiting block arranged at the top of the variable-amplitude fly jib, and an anti-backward-tilting limiting frame hinged to a second top section, a self-adjusting supporting frame is hinged to the supporting base, a balancing weight is connected to the bottom of the self-adjusting supporting frame, a clamping groove is formed in the limiting block, a limiting arc-shaped groove is formed in the anti-back-tipping limiting frame, a sliding shaft is fixedly arranged in the middle of the supporting rod assembly, and the sliding shaft is connected into the limiting arc-shaped groove in a sliding mode. According to the device, interference between the limiting block and the supporting rod assembly can be avoided when the variable-amplitude fly jib is horizontally placed through matching of the self-adjusting supporting frame and the anti-backward-tilting limiting frame, and when the variable-amplitude fly jib is in a working state and reaches a limit angle, the supporting rod assembly can prevent the variable-amplitude fly jib from continuing to perform backward tilting action; and good stability, practicability and safety are achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of crawler cranes, and particularly relates to a crawler crane and an anti-tipping automatic adjusting device for a crawler crane. Background Art

[0002] As a special operation device, a crawler crane has high requirements for the safety of the equipment and surrounding personnel during the operation process. Under the action of external forces such as oncoming wind loads or inertial forces of the boom system during movement, the boom system is prone to rearward tilt, causing safety accidents. In order to resist the tendency of the tower boom to tilt backward, an anti-rearward tilt device will be installed at the bottom section of the luffing auxiliary boom. The anti-rearward tilt device can, to a certain extent, resist the rearward tilt of the tower boom. Different anti-rearward tilt structural forms and principles are also different. Due to the large variety of length combinations of the boom in the tower boom working conditions and the many operating limit conditions of each component, the anti-rearward tilt structure is relatively complex and costly.

[0003] In the prior art, for the anti-rearward tilt method of the luffing auxiliary boom, generally, a pin shaft is fixed on the top section of the main boom. When the angle between the luffing auxiliary boom and the main boom reaches the design value during hoisting operations, the top end of the anti-rearward tilt device cooperates with the hinge point on the bottom section of the luffing auxiliary boom to play a limiting role. When the boom of the crawler crane is assembled according to the working conditions and the main boom and the luffing auxiliary boom need to be placed horizontally, this anti-rearward tilt method is in a non-working state and is prone to interference with the bottom section of the tower boom due to its fixed length. Therefore, the anti-rearward tilt movement trajectory of the luffing auxiliary boom needs to be set to adapt to both the working state and the non-working state. To sum up, there is an urgent need for a crawler crane that can automatically adjust anti-tipping. Summary of the Utility Model

[0004] To solve some or all of the technical problems existing in the above prior art, on the one hand, the utility model provides an anti-tipping automatic adjusting device for a crawler crane. The anti-tipping automatic adjusting device is arranged between the luffing auxiliary boom and the main boom. The top of the main boom is provided with a first top section, and the bottom is provided with a second top section. One end of the luffing auxiliary boom is provided with a third top section. The main boom and the luffing auxiliary boom are hinged through the second top section and the third top section. The anti-tipping automatic adjusting device for a crawler crane includes a support rod assembly hinged to the first top section, a support seat arranged on the top of the luffing auxiliary boom, a limit block arranged on the top of the luffing auxiliary boom, and an anti-rearward tilt limit frame hinged to the second top section, wherein:

[0005] The support rod assembly includes an outer rod hinged to the first top section, an inner rod sleeved on the inner wall of the outer rod. A central adjusting plate is arranged at the free end of the inner rod. A buffer spring is arranged between the central adjusting plate and the outer rod. The inner rod and the outer rod are slidably connected;

[0006] An adjustable support frame is hinged to the support base, a counterweight is connected to the bottom of the adjustable support frame, and the top end face of the adjustable support frame matches the outer circumference of the outer rod;

[0007] A clamping groove matching the central adjusting plate is formed on the limiting block, a limiting arc groove is formed on the anti-tipping limiting frame, and a sliding shaft is fixedly arranged in the middle of the outer rod, and the sliding shaft is slidably connected in the limiting arc groove.

[0008] Further, in the above anti-tipping automatic adjustment device for a crawler crane, the adjustable support frame is hinged to the support base through a fastener, the anti-tipping limiting frame is hinged to the second top section through the fastener, and one end of the outer rod is hinged to the first top section through the fastener.

[0009] As a specific implementation manner, in the above anti-tipping automatic adjustment device for a crawler crane, the fastener is a pin shaft.

[0010] As a specific implementation manner, in the above anti-tipping automatic adjustment device for a crawler crane, the adjustable support frame and the counterweight are integrally connected.

[0011] On the other hand, the present invention also provides a crawler crane, and the crawler crane includes the above anti-tipping automatic adjustment device.

[0012] The anti-tipping automatic adjustment device for a crawler crane of the present invention has the following advantages and beneficial effects:

[0013] The device has a simple structure and is convenient for disassembly and assembly. Through the cooperation of the adjustable support frame and the anti-tipping limiting frame, interference between the limiting block and the support rod assembly can be avoided when the luffing jib is horizontally placed. When the luffing jib is in the working state, the position of the support rod assembly is restricted by the limiting arc groove, preventing interference between the support rod assembly and the luffing jib. When the luffing jib reaches the limit angle, the support rod assembly can effectively prevent the luffing jib from further tilting backward. The device has good stability and practicability, providing reliable safety for the entire boom system. Description of the Drawings

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only for further understanding of the embodiments of the present invention and constitute a part of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings. In the drawings:

[0015] Figure 1It is a schematic structural diagram of an anti-tipping automatic adjustment device for a crawler crane of the present utility model.

[0016] Explanation of reference numerals in the drawings:

[0017] 1 - Support rod assembly, 11 - Central adjustment plate, 12 - Buffer spring, 13 - Slide shaft, 2 - Limit block, 3 - Self-adjusting support frame, 4 - Counterweight, 5 - Anti-rear-tipping limit frame, 51 - Limit arc groove, 100 - Luffing jib, 101 - Third top section, 200 - Main boom, 201 - First top section, 202 - Second top section. Specific implementation manners

[0018] To make the objectives, technical solutions and advantages of the present utility model clearer, the technical solutions of the present utility model will be clearly and completely described below in conjunction with specific embodiments of the present utility model and the corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative efforts shall fall within the protection scope of the present utility model.

[0019] On the one hand, as Figure 1As shown in the figure, the utility model discloses an anti-tipping automatic adjustment device for a crawler crane. The anti-tipping automatic adjustment device is arranged between the luffing jib 100 and the main boom 200. A first top section 201 is arranged at the top of the main boom 200, and a second top section 202 is arranged at the bottom. One end of the luffing jib 100 is provided with a third top section 101. The main boom 200 and the luffing jib 100 are hinged through the second top section 202 and the third top section 101. The luffing jib 100 can rotate around the third top section 101. The anti-tipping automatic adjustment device includes a support rod assembly 1 hinged to the first top section 201, a support seat fixedly arranged at the top of the luffing jib 100, a limit block 2 arranged at the top of the luffing jib 100, and an anti-back-tipping limit frame 5 hinged to the second top section 202. The support rod assembly 1 is arranged above the support seat and the anti-back-tipping limit frame 5. Among them, the support rod assembly 1 includes an outer rod hinged to the first top section 201, and an inner rod sleeved inside the inner wall of the outer rod. A central adjustment plate 11 is arranged at the free end of the inner rod. A buffer spring 12 is arranged between the central adjustment plate 11 and the outer rod. The inner rod and the outer rod are slidably connected. When the central adjustment plate 11 moves towards the outer rod, the buffer spring 12 is compressed, and the inner rod shrinks into the outer rod. On the contrary, when the central adjustment plate 11 moves away from the outer rod, the buffer spring 12 resumes its shape, and the inner rod extends out of the outer rod. A self-adjusting support frame 3 is hinged to the support seat. A counterweight 4 is connected to the bottom of the self-adjusting support frame 3. As the luffing jib 100 rotates, the counterweight 4 is affected by gravity, causing the self-adjusting support frame 3 to rotate relative to the luffing jib 100. For example, when the luffing jib 100 rotates clockwise around the third top section 101, the self-adjusting support frame 3 rotates counterclockwise relative to the luffing jib 100. When the luffing jib 100 rotates counterclockwise around the third top section 101, the self-adjusting support frame 3 rotates clockwise relative to the luffing jib 100. The top end face of the self-adjusting support frame 3 matches the outer circumference of the outer rod, and the outer rod can stably abut against the top of the self-adjusting support frame 3. A card slot matching the central adjustment plate 11 is opened on the limit block 2. When the luffing jib 100 rotates clockwise to a specified position, the central adjustment plate 11 will be inserted into the card slot. A limit arc-shaped groove 31 is opened on the anti-back-tipping limit frame 5. A sliding shaft 13 is fixedly arranged in the middle of the outer rod. The sliding shaft 13 is slidably connected in the limit arc-shaped groove 31. The movement track of the sliding shaft 13 can be limited through the limit arc-shaped groove 31, and further the movement track of the support rod assembly 1 can be limited.

[0020] Further, in the anti-tipping automatic adjustment device for a crawler crane of the present utility model, the self-adjusting support frame 3 is hinged to the support seat through fasteners, the anti-back-tipping limit frame 5 is hinged to the second top section 202 through fasteners, and one end of the outer rod is hinged to the first top section 201 through fasteners.

[0021] As a specific implementation, in the anti-tipping automatic adjustment device for crawler cranes of the present utility model, the fastener is a pin shaft. Of course, other fasteners such as rivets can also be used as long as they can serve as a hinge shaft.

[0022] As a specific implementation, in the anti-tipping automatic adjustment device for crawler cranes of the present utility model, the self-adjusting support frame 3 and the counterweight 4 are integrally connected. With this setting, the self-adjusting support frame 3 is more stable and can better support the outer rod.

[0023] On the other hand, the present utility model also provides a crawler crane, and the crawler crane includes the above anti-tipping automatic adjustment device.

[0024] The working principle of the anti-tipping automatic adjustment device for crawler cranes of the present utility model is as follows:

[0025] When assembling the luffing jib 100, the luffing jib 100 is in a non-working state, and the main boom 200 and the luffing jib 100 need to be placed horizontally. Due to the influence of gravity on the counterweight 4, the self-adjusting support frame 3 rotates to be perpendicular to the luffing jib 100. During this process, the self-adjusting support frame 3 pushes the outer rod upward until the central adjusting plate 11 disengages from the card slot, and the support rod assembly 1 and the limit block 2 do not interfere with each other. At this time, the horizontal placement of the main boom 200 and the luffing jib 100 can be achieved;

[0026] When the luffing jib 100 is in a working state, when the luffing jib 100 rotates counterclockwise, through the self-adjusting support frame 3 and the anti-back-tipping limit frame 5, the interference between the support rod assembly 1 and the luffing jib 100 can be prevented. When the luffing jib 100 rotates clockwise, it drives the limit block 2 to approach the central adjusting plate 11 until the central adjusting plate 11 is inserted into the card slot. At this time, when the luffing jib 100 continues to rotate clockwise, the central adjusting plate 11 pushes the inner rod to contract along the axial direction towards the outer rod. At this time, the buffer spring 12 contracts until the central adjusting plate 11 displaces to the limit position and stops. At this time, the entire support rod assembly 1 is a rigid support for the luffing jib 100, and a triangular structure is formed among the support rod assembly 1, the main boom 200, and the luffing jib 100, which has good stability and can effectively support the backward tilt of the luffing jib 100.

[0027] To sum up, compared with the prior art, the anti-tipping automatic adjustment device for crawler cranes of the present utility model has the following advantages and beneficial effects:

[0028] This device has a simple structure and is convenient for disassembly and assembly. Through the cooperation of the self-adjusting support frame 3 and the anti-backward tilting limit frame 5, interference between the limit block 2 and the support rod assembly 1 can be avoided when the luffing jib 100 is horizontally placed. When the luffing jib 100 is in the working state, the position of the support rod assembly 1 is restricted by the limit arc groove 31, preventing interference between the support rod assembly 1 and the luffing jib 100. When the luffing jib 100 reaches the limit angle, the support rod assembly 1 can effectively prevent the luffing jib 100 from further tilting backward. This device has good stability and practicability, providing reliable safety for the entire boom system.

[0029] It should be noted that in this text, unless otherwise clearly specified and defined, the term "connection" or its synonyms should be understood in a broad sense. 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 directly connected or indirectly connected through an intermediate medium, and it can be the internal connection of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meaning of the above terms in this utility model can be understood according to specific circumstances. Moreover, expressions such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. At the same time, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or further includes elements inherent to such process, method, article or device. In addition, "front", "rear", "left", "right", "up", "down", etc. in this text are all referenced to the placement state shown in the drawings.

[0030] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model and are not intended to limit them; although the present utility model has been described in detail with reference to the embodiments, those skilled in the art should understand that: the technical solutions recorded in the foregoing embodiments can still be modified, or some of the technical features can be equivalently replaced; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present utility model.

Claims

1. An anti-tipping automatic adjustment device for a crawler crane, the anti-tipping automatic adjustment device is arranged between the luffing jib and the main boom, a first top section is arranged at the top of the main boom, and a second top section is arranged at the bottom. One end of the luffing jib is provided with a third top section, and the main boom and the luffing jib are hinged and connected through the second top section and the third top section, characterized in that, The anti-tipping automatic adjustment device for the crawler crane includes a support rod assembly hinged to the first top section, a support seat arranged at the top of the luffing jib, a limit block arranged at the top of the luffing jib, and an anti-back-tipping limit frame hinged to the second top section, wherein: The support rod assembly includes an outer rod hinged to the first top section, an inner rod sleeved on the inner wall of the outer rod. A central adjustment plate is arranged at the free end of the inner rod. A buffer spring is arranged between the central adjustment plate and the outer rod. The inner rod and the outer rod are slidably connected; A self-adjusting support frame is hinged to the support seat. A counterweight is connected to the bottom of the self-adjusting support frame. The top end face of the self-adjusting support frame matches the outer periphery of the outer rod; A clamping groove matching the central adjustment plate is formed on the limit block. A limit arc groove is formed on the anti-back-tipping limit frame. A sliding shaft is fixedly arranged in the middle of the outer rod. The sliding shaft is slidably connected in the limit arc groove.

2. The anti-tipping automatic adjustment device for crawler crane according to claim 1, characterized in that, The self-adjusting support frame is hinged to the support seat through a fastener. The anti-back-tipping limit frame is hinged to the second top section through the fastener. One end of the outer rod is hinged to the first top section through the fastener.

3. The anti-tipping automatic adjustment device for a crawler crane according to claim 2, characterized in that, The fastener is a pin shaft.

4. The anti-tipping automatic adjustment device for a crawler crane according to claim 1, characterized in that, The self-adjusting support frame and the counterweight are integrally connected.

5. A crawler crane, characterized in that, The crawler crane includes the anti-tipping automatic adjustment device according to any one of claims 1-4.

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