Limiting device for gantry crane

Abstract

The utility model discloses a limiting device for a gantry crane, and relates to the technical field of gantry cranes. The gantry crane walking device comprises a track, gantry crane walking supporting legs are connected to the track in a sliding mode, and the gantry crane walking device further comprises a limiting buffering mechanism. According to the limiting and buffering mechanism, specifically, when the walking supporting legs of the gantry crane move towards the ends of the rails, the running range of the walking supporting legs is rigidly limited by limiting blocks firstly, and the walking supporting legs are prevented from exceeding the safety boundary; when the gantry crane is impacted by walking supporting legs of the gantry crane, the limiting block drives the buffer rod to move, the first spring is compressed to achieve first-stage buffer, then the buffer block slides along the guide rod, the damper and the second spring are promoted to deform to complete second-stage buffer, and in the whole process, the impact force is absorbed and dispersed in stages through the synergistic effect of the first-stage buffer assembly and the second-stage buffer assembly; instantaneous impact force generated when the gantry crane walking supporting legs make contact with the limiting blocks is effectively reduced, the situation that the limiting blocks and the rails are damaged due to long-term impact is avoided, and it is guaranteed that the limiting function is stable and reliable for a long time.

Description

Technical Field

[0001] This utility model belongs to the field of gantry crane technology, and in particular relates to a limiting device for gantry cranes. Background Technology

[0002] Gantry cranes, a type of bridge crane, are named for their portal-shaped metal structure. They are widely used in various industrial settings, often for loading and unloading goods in outdoor freight yards and material yards. During the operation of a gantry crane, the limit device is a key component to ensure its safe operation. It is used to precisely limit the operating range of the gantry crane and prevent serious accidents such as derailment or collisions caused by exceeding the preset range.

[0003] Currently, gantry crane limit devices are usually fixed to the slide rails using fastening bolts and other connecting parts. However, when the gantry crane moves rapidly during operation due to inertia and other factors and comes into contact with the limit device, a large impact force is generated. Since most existing limit devices lack effective buffer design, they are unable to effectively dissipate this impact force. Over time, this can not only damage the limit device itself, causing components to loosen, deform, or even break, reducing its service life and limit accuracy, but may also damage the gantry crane's traveling mechanism, affecting the overall operational stability of the gantry crane. In severe cases, it can even lead to safety accidents, endangering the lives of workers and causing huge property losses. Utility Model Content

[0004] The purpose of this utility model is to provide a limiting device for gantry cranes. By setting a limiting and buffering mechanism, specifically, when the traveling outriggers of the gantry crane move towards the end of the track, the limiting block first rigidly restricts its operating range to prevent it from exceeding the safety boundary. When impacted by the traveling outriggers of the gantry crane, the limiting block drives the buffer rod to move, causing the spring to compress and achieve primary buffering. Subsequently, the buffer block slides along the guide rod, causing the damper and spring to deform and complete secondary buffering. The entire process, through the synergistic action of the primary and secondary buffering components, absorbs and disperses the impact force in stages, effectively reducing the instantaneous impact force when the traveling outriggers of the gantry crane contact the limiting block, avoiding damage to the limiting block and track due to long-term impact, and ensuring the long-term stability and reliability of the limiting function. This solves the problem that when the gantry crane moves rapidly due to inertia and other factors during operation and comes into contact with the limiting device, a large impact force is generated. Since most existing limiting devices lack effective buffering design, it is difficult to effectively dissipate this impact force.

[0005] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0006] This utility model relates to a limiting device for a gantry crane, including a track on which the traveling legs of the gantry crane are slidably connected, and further comprising:

[0007] A limiting and buffering mechanism, comprising two sets, is mounted on a track and used to limit and buffer the travel outriggers of the gantry crane. Each limiting and buffering mechanism includes a limiting block slidably connected to the track, and a buffer rod fixedly connected to the left side of the limiting block; and

[0008] The installation mechanism is provided in two sets and is mounted on the limiting buffer mechanism. The installation mechanism is used to quickly disassemble and install the limiting buffer mechanism. The installation mechanism includes a fixed seat and a sliding groove is provided on the fixed seat.

[0009] Among them, two sets of limit buffer mechanisms and installation mechanisms are symmetrically arranged at both ends of the track with the center line of the track as the axis, and the traveling outriggers of the gantry crane are located between the two limit buffer mechanisms and installation mechanisms.

[0010] Furthermore, the limiting and buffering mechanism also includes a primary buffer assembly, which is mounted on the track and is used to provide the first buffer against the impact received by the limiting block when it limits the travel outriggers of the gantry crane; and

[0011] A secondary buffer assembly is disposed on the primary buffer assembly, and the secondary buffer assembly is used to provide a second buffer for the impact force received by the limiting block when it limits the traveling outrigger of the gantry crane;

[0012] Among them, the gantry crane's traveling outriggers are limited by the limit block. When the gantry crane's traveling outriggers come into contact with the limit block and cause impact, the limit block is double-buffered by the cooperation of the primary buffer component and the secondary buffer component, which reduces the impact force when the gantry crane's traveling outriggers come into contact with the limit block and causes damage to the limit block and the track.

[0013] Furthermore, the mounting mechanism also includes a mounting component, which is disposed on a fixed base and is used to mount and fix the limiting buffer mechanism; and

[0014] An elastic component is disposed inside the fixed base, and the elastic component is used for quick disassembly of the limiting buffer mechanism;

[0015] A locking component is provided on a mounting base and is used to enhance the fixing effect of the mounting component.

[0016] Furthermore, the primary buffer assembly includes a support plate slidably connected to the track, a buffer seat fixedly connected to the top of the support plate, the left end of the buffer rod extending into the interior of the buffer seat and slidably connected to the buffer seat, a spring sleeved on the outer wall of the buffer rod, and the fixed seat fixedly connected to the left side of the buffer seat.

[0017] The buffer seat is fixedly connected to the support plate by welding, and the support plate is adapted to the track.

[0018] Furthermore, the secondary buffer assembly includes a buffer block fixedly connected to the left end of the buffer rod, and a number of guide rods are fixedly connected to the inner wall of the buffer seat. The guide rods pass through the buffer block and are slidably connected to the buffer block. The buffer block is hinged to the inner wall of the buffer seat with four dampers, and springs are sleeved on the outer walls of the four dampers.

[0019] One end of each of the four dampers is hinged to the outer side of the buffer block via a hinge seat, and the other end is hinged to the inner wall of the buffer seat via a hinge seat. The ends of the four dampers furthest from the buffer block are also evenly distributed on the inner wall of the buffer seat.

[0020] Furthermore, the mounting assembly includes a slide rod slidably connected to the inner wall of the slide groove, a locking block fixedly connected to the bottom end of the slide rod, a locking groove being provided at the top of the track, and the bottom end of the locking block extending into the interior of the locking groove and fitting into the locking groove.

[0021] Among them, the dimensions of the locking block and locking groove gradually decrease from top to bottom.

[0022] Furthermore, the elastic component includes a connecting piece fixedly connected to the outer wall of the slide rod, and a spring is sleeved on the outer wall of the slide rod;

[0023] One end of the spring is fixedly connected to the connecting piece, and the other end is fixedly connected to the top inner wall of the slide groove.

[0024] Furthermore, the locking assembly includes a Z-shaped plate fixedly connected to the top of the slide bar, and the Z-shaped plate is threadedly connected to the track with bolts;

[0025] The bolt has a hexagonal groove on its top, which is compatible with a hexagonal wrench.

[0026] This utility model has the following beneficial effects:

[0027] 1. This utility model, through the setting of a limiting buffer mechanism, specifically, when the traveling outrigger of the gantry crane moves towards the end of the track, the limiting block first rigidly restricts its operating range to prevent it from exceeding the safety boundary; when impacted by the traveling outrigger of the gantry crane, the limiting block drives the buffer rod to move, causing the spring to compress to achieve the first stage of buffering. Subsequently, the buffer block slides along the guide rod, causing the damper and spring to deform to complete the second stage of buffering. The entire process, through the synergistic action of the first-stage and second-stage buffer components, absorbs and disperses the impact force in stages, effectively reducing the instantaneous impact force when the traveling outrigger of the gantry crane contacts the limiting block, avoiding damage to the limiting block and the track due to long-term impact, and ensuring the long-term stability and reliability of the limiting function.

[0028] 2. This utility model, through the setting of an installation mechanism, specifically uses a Z-shaped plate to drive the sliding rod to move, so that the locking block is inserted into the locking groove for initial fixation. The movement of the sliding rod drives the connecting piece to move and the spring is stretched three times, and then reinforced by bolts. When disassembling, unscrewing the bolts, the spring three times rebound force drives the locking block to disengage from the locking groove, thus completing the disassembly. The entire process, through the cooperation of the installation component, elastic component and locking component, realizes the rapid installation and disassembly of the limit buffer mechanism, greatly improving the efficiency of disassembly and assembly, facilitating later maintenance and replacement, and reducing the time cost and operation difficulty in the disassembly and assembly process.

[0029] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0030] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0032] Figure 2 This is a schematic diagram of the structure of the support plate of this utility model;

[0033] Figure 3 This is a cross-sectional structural diagram of the buffer seat of this utility model;

[0034] Figure 4 This is a schematic diagram of the structure of the buffer block of this utility model;

[0035] Figure 5 This is a schematic diagram of the locking block of this utility model.

[0036] The attached diagram lists the components represented by each number as follows:

[0037] 1. Track; 11. Gantry crane traveling support legs; 2. Limiting and buffering mechanism; 21. Limiting block; 211. Buffer rod; 22. Primary buffer assembly; 221. Support plate; 222. Buffer seat; 223. Spring one; 23. Secondary buffer assembly; 231. Buffer block; 232. Guide rod; 233. Damper; 234. Spring two; 3. Mounting mechanism; 31. Fixed seat; 311. Slide groove; 32. Mounting assembly; 321. Slide rod; 322. Locking block; 323. Locking groove; 33. Elastic assembly; 331. Connecting piece; 332. Spring three; 34. Locking assembly; 341. Z-shaped plate; 342. Bolt. Detailed Implementation

[0038] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0039] Please see Figure 1-5 As shown, this utility model is a limiting device for a gantry crane, including a track 1, on which gantry crane traveling legs 11 are slidably connected, and also including:

[0040] The limiting and buffering mechanism 2 has two sets, and is mounted on the track 1. The limiting and buffering mechanism 2 is used to limit and buffer the travel outriggers 11 of the gantry crane. The limiting and buffering mechanism 2 includes a limiting block 21 slidably connected to the track 1, and a buffer rod 211 fixedly connected to the left side of the limiting block 21; and

[0041] The installation mechanism 3 has two sets and is set on the limiting buffer mechanism 2. The installation mechanism 3 is used to quickly disassemble and install the limiting buffer mechanism 2. The installation mechanism 3 includes a fixed seat 31 with a sliding groove 311. The two sets of limiting buffer mechanisms 2 and installation mechanism 3 are symmetrically arranged at both ends of the track 1 with the center line of the track 1 as the axis. The traveling support leg 11 of the gantry crane is located between the two limiting buffer mechanisms 2 and the installation mechanism 3.

[0042] The limiting and buffering mechanism 2 also includes a primary buffer assembly 22, which is mounted on the track 1. The primary buffer assembly 22 is used to provide the first buffer against the impact received by the limiting block 21 when it limits the travel outrigger 11 of the gantry crane; and

[0043] The secondary buffer component 23 is installed on the primary buffer component 22. The secondary buffer component 23 is used to provide a second buffer for the impact force received by the limit block 21 when it limits the travel leg 11 of the gantry crane. The limit block 21 limits the travel leg 11 of the gantry crane. When the travel leg 11 of the gantry crane contacts the limit block 21 and causes an impact, the primary buffer component 22 and the secondary buffer component 23 work together to provide double buffering for the limit block 21, reducing the damage to the limit block 21 and the track 1 caused by the impact force when the travel leg 11 of the gantry crane contacts the limit block 21.

[0044] The mounting mechanism 3 also includes a mounting component 32, which is mounted on the fixed base 31 and is used to mount and fix the limiting buffer mechanism 2; and

[0045] The elastic component 33 is disposed inside the fixed base 31 and is used to quickly disassemble the limiting buffer mechanism 2.

[0046] Locking component 34 is disposed on the mounting base 31 and is used to enhance the fixing effect of mounting component 32.

[0047] The primary buffer assembly 22 includes a support plate 221 slidably connected to the track 1. A buffer seat 222 is fixedly connected to the top of the support plate 221. The left end of the buffer rod 211 extends into the interior of the buffer seat 222 and is slidably connected to the buffer seat 222. A spring 223 is sleeved on the outer wall of the buffer rod 211. The fixed seat 31 is fixedly connected to the left side of the buffer seat 222. When the limiting block 21 moves due to the impact of the gantry crane traveling support leg 11, it will drive the buffer rod 211 to move into the interior of the buffer seat 222 and compress the spring 223, thereby dispersing the impact force on the limiting block 21 through the spring 223.

[0048] The secondary buffer assembly 23 includes a buffer block 231 fixedly connected to the left end of the buffer rod 211. Several guide rods 232 are fixedly connected to the inner wall of the buffer seat 222. The guide rods 232 all pass through the buffer block 231 and are slidably connected to the buffer block 231. Four dampers 233 are hinged to the inner wall of the buffer block 231 and the buffer seat 222. Springs 234 are sleeved on the outer wall of the four dampers 233. The two ends of the four springs 234 are fixedly connected to the corresponding hinge seats.

[0049] The mounting assembly 32 includes a slide rod 321 slidably connected to the inner wall of the slide groove 311. A locking block 322 is fixedly connected to the bottom end of the slide rod 321. A locking groove 323 is provided at the top of the track 1. The bottom end of the locking block 322 extends into the interior of the locking groove 323 and is adapted to the locking groove 323. The slide rod 321 is limited by the locking block 322 being inserted into the locking groove 323. The slide rod 321 is located in the slide groove 311 on the fixed seat 31. The fixed seat 31 is fixedly connected to the buffer seat 222. Therefore, the buffer seat 222 is limited by the cooperation of the locking block 322 and the locking groove 323.

[0050] The elastic component 33 includes a connecting piece 331 fixedly connected to the outer wall of the slide bar 321. A spring 332 is sleeved on the outer wall of the slide bar 321. When the locking block 322 is inserted into the locking groove 323 through the slide bar 321, the slide bar 321 will drive the connecting piece 331 to move and cause the spring 332 to stretch.

[0051] The locking assembly 34 includes a Z-shaped plate 341 fixedly connected to the top of the slide rod 321. A bolt 342 is threadedly connected between the Z-shaped plate 341 and the track 1. The bolt 342 secures the Z-shaped plate 341 to the track 1, making it difficult for the slide rod 321 to move. This fixes the entire device to the track 1, increasing the overall stability of the device.

[0052] A specific application of this embodiment is as follows: When the gantry crane's traveling outrigger 11 moves towards the end of the track 1, the limiting block 21, as a direct contact component, first acts as a blocking element, using its own structural strength to rigidly limit the operating range of the gantry crane's traveling outrigger 11, preventing it from exceeding the safety boundary of the track 1, thus achieving a basic limiting effect; when the gantry crane's traveling outrigger 11 contacts the limiting block 21 and generates an impact, the limiting block 21 is driven by the impact to slide the buffer rod 211 into the buffer seat 222. At this time, the spring 223 sleeved on the outer wall of the buffer rod 211 is compressed, and the elastic deformation of the spring 223 absorbs part of the impact. The force provides initial buffering against the impact on the limiting block 21, reducing the instantaneous force on the limiting block 21. As the buffer rod 211 continues to move, the buffer block 231 at its left end slides along the guide rod 232 inside the buffer seat 222, causing the four dampers 233 hinged to the inner wall of the buffer block 231 and the buffer seat 222 to be compressed. The dampers 233 consume the impact energy using their own damping characteristics, while the spring 234 on its outer wall deforms synchronously to further absorb energy. Through secondary buffering, the impact force is further reduced, preventing the limiting block 21 and the track 1 from being damaged by long-term impact, and ensuring the long-term reliability of the limiting function.

[0053] During installation, the limiting block 21 and the support plate 221 are first installed onto the track 1 and slidably connected to it. Once in the appropriate position, the Z-shaped plate 341 drives the sliding rod 321 and the locking block 322 at the bottom of the sliding rod 321 downwards, causing the locking block 322 to insert into the locking groove 323. The tapered fit between the locking block 322 and the locking groove 323 quickly achieves initial fixation, preventing displacement of the limiting buffer mechanism 2 on the track 1. The spring 332, when the locking block 322 is inserted into the locking groove 323, is driven by the sliding rod 321... The movement of the connecting piece 331 puts it in a stretched state. Finally, the locking assembly 34, composed of the Z-shaped plate 341 and the bolt 342, firmly fixes the slide rod 321 to the track 1, further enhancing the installation effect and preventing the limiting buffer mechanism 2 from loosening during operation. When disassembling, after unscrewing the bolt 342, the rebound force of the spring 332 drives the slide rod 321 and the locking block 322 to reset, allowing the locking block 322 to quickly disengage from the locking groove 323, realizing the quick disassembly of the limiting buffer mechanism 2, which facilitates later maintenance and replacement, and ensures the convenience and stability of the installation and disassembly process.

[0054] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0055] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A limiting device for a gantry crane, comprising a track (1), wherein gantry crane traveling legs (11) are slidably connected on the track (1), characterized in that, Also includes: A limiting buffer mechanism (2) is provided in two sets. The limiting buffer mechanism (2) is set on the track (1). The limiting buffer mechanism (2) is used to limit and buffer the traveling legs (11) of the gantry crane. The limiting buffer mechanism (2) includes a limiting block (21) slidably connected to the track (1). A buffer rod (211) is fixedly connected to the left side of the limiting block (21). The installation mechanism (3) is provided in two sets. The installation mechanism (3) is set on the limiting buffer mechanism (2). The installation mechanism (3) is used to quickly disassemble and install the limiting buffer mechanism (2). The installation mechanism (3) includes a fixed seat (31). The fixed seat (31) is provided with a sliding groove (311). Among them, two sets of limiting buffer mechanisms (2) and installation mechanisms (3) are symmetrically arranged at both ends of the track (1) with the center line of the track (1) as the axis, and the traveling support (11) of the gantry crane is located between the two limiting buffer mechanisms (2) and installation mechanisms (3).

2. The limiting device for gantry crane according to claim 1, characterized in that, The limiting buffer mechanism (2) further includes a primary buffer assembly (22), which is set on the track (1). The primary buffer assembly (22) is used to buffer the impact of the limiting block (21) on the traveling support leg (11) of the gantry crane when it is limited. as well as A secondary buffer assembly (23) is provided on the primary buffer assembly (22). The secondary buffer assembly (23) is used to provide a second buffer for the impact force received by the limiting block (21) when it limits the traveling support leg (11) of the gantry crane. Among them, the gantry crane traveling outrigger (11) is limited by the limiting block (21). When the gantry crane traveling outrigger (11) contacts the limiting block (21) and causes an impact, the limiting block (21) is double-buffered by the cooperation of the first-level buffer component (22) and the second-level buffer component (23), reducing the impact force when the gantry crane traveling outrigger (11) contacts the limiting block (21) and the damage to the limiting block (21) and the track (1).

3. The limiting device for gantry crane according to claim 2, characterized in that, The mounting mechanism (3) further includes a mounting component (32), which is mounted on a fixed base (31) and is used to install and fix the limiting buffer mechanism (2); and An elastic component (33) is disposed inside the fixed base (31) and is used to quickly disassemble the limiting buffer mechanism (2); A locking component (34) is disposed on a mounting base (31) and is used to enhance the fixing effect of the mounting component (32).

4. The limiting device for gantry crane according to claim 2, characterized in that, The primary buffer assembly (22) includes a support plate (221) slidably connected to the track (1), a buffer seat (222) fixedly connected to the top of the support plate (221), the left end of the buffer rod (211) extending into the interior of the buffer seat (222) and slidably connected to the buffer seat (222), a spring (223) sleeved on the outer wall of the buffer rod (211), and the fixed seat (31) fixedly connected to the left side of the buffer seat (222). One end of spring 1 (223) is fixedly connected to the limiting block (21), and the other end is fixedly connected to the right side of the buffer seat (222).

5. The limiting device for gantry crane according to claim 4, characterized in that, The secondary buffer assembly (23) includes a buffer block (231) fixedly connected to the left end of the buffer rod (211). A plurality of guide rods (232) are fixedly connected to the inner wall of the buffer seat (222). The plurality of guide rods (232) all pass through the buffer block (231) and are slidably connected to the buffer block (231). The buffer block (231) is hinged to the inner wall of the buffer seat (222) with four dampers (233). The outer walls of the four dampers (233) are all fitted with springs (234). The buffer block (231) is rectangular, and four dampers (233) are evenly distributed on the outside of the buffer block (231).

6. The limiting device for gantry crane according to claim 3, characterized in that, The mounting assembly (32) includes a slide rod (321) slidably connected to the inner wall of the slide groove (311), a locking block (322) is fixedly connected to the bottom end of the slide rod (321), a locking groove (323) is provided on the top of the track (1), and the bottom end of the locking block (322) extends into the interior of the locking groove (323) and is adapted to the locking groove (323); The bottom of the locking block (322) and the cross-section of the locking groove (323) are both designed to be conical, and the locking groove (323) is adapted to the bottom of the locking block (322).

7. The limiting device for gantry crane according to claim 3, characterized in that, The elastic component (33) includes a connecting piece (331) fixedly connected to the outer wall of the slide rod (321), and a spring (332) is sleeved on the outer wall of the slide rod (321); The connecting piece (331) is designed in the shape of a circular piece, and the connecting piece (331) is adapted to the inner wall of the groove (311).

8. The limiting device for gantry crane according to claim 3, characterized in that, The locking assembly (34) includes a Z-shaped plate (341) fixedly connected to the top of the slide bar (321), and the Z-shaped plate (341) is threadedly connected to the track (1) by a bolt (342); The Z-shaped plate (341) is fixedly connected to the top of the slide bar (321) by welding. The two are linked and cooperate with each other. If one moves, the other moves with it. If one does not move, the other will not move either.

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