A vertical pinning cylinder support device

Abstract

The utility model discloses a kind of vertical through pin oil cylinder support device, belong to tower crane technical field.The device solves the existing vertical pin shaft installation and dismounting rely on large hoisting equipment, operation dangerous, limited and resource waste and other problems such as applicable scene.The technical scheme mainly includes: support main structure, its U-shaped channel steel both sides are provided with equidistance's reserved hole and pin hole;Through pin oil cylinder, its bottom end is connected with different height pin hole by latch to realize multistage positioning;Pin bolt, one end is screwed into pin shaft, the other end is detachably connected with oil cylinder through ear ring;And bracing bar, for when changing level through reserved hole and the hole plate on pin bolt, temporarily support pin shaft weight.The utility model is through the cyclic operation of "pulling-temporarily fixed-changing level", realizes the safe, efficient grading plug of heavy pin shaft, gets rid of the dependence on large hoisting equipment, widens applicable scene, and has the advantages such as simple structure, economical.

Description

Technical Field

[0001] This utility model relates to the field of tower crane technology, and in particular to a vertical through-pin hydraulic cylinder support device. Background Technology

[0002] Tower cranes, as key equipment in large-scale construction projects, rely on the reliable connection of multiple large pins for structural stability. A significant portion of these pins are installed vertically or near vertically. Because these pins are typically large and heavy, they are highly susceptible to sudden collapse under their own weight during manual installation or dismantling. This not only poses a significant safety hazard but also makes precise positioning difficult to control manually, increasing both the operational complexity and risk.

[0003] Currently, in industry practice, the installation and dismantling of such vertical pins generally rely on external lifting equipment, such as overhead cranes, bridge cranes, or truck cranes. In practice, the lifting equipment needs to hold the pin, and personnel must adjust it while lifting to complete the insertion or removal operation. However, this traditional method has significant limitations. First, its application scenarios are severely restricted. In specific locations where the crane's internal space is narrow, outdoor lifting conditions are unavailable, or lifting equipment cannot reach, this method is difficult to implement or even completely infeasible. Second, tower cranes have a large number of vertical pins, and each installation or dismantling operation requires the use of large lifting equipment intermittently or even for extended periods, resulting in inefficient use of this valuable resource. Waiting and coordination time significantly prolongs maintenance cycles, leading to substantial time costs and wasted equipment resources.

[0004] Furthermore, existing technologies lack a portable, integrated tool specifically designed to solve the challenges of installing and removing vertical pins. While some simple auxiliary tooling may exist, it is often single-function and cannot achieve stable, controllable multi-stage operation. It also cannot effectively lock the pin's position during extraction or insertion, leaving safety risks unresolved. Therefore, developing a dedicated device that eliminates reliance on large lifting equipment, adapts to various operating environments, and safely and efficiently completes the installation and removal of vertical pins has become a pressing technical problem in this field. Utility Model Content

[0005] The purpose of this utility model is to overcome the problems in the background art and provide a vertical through-pin hydraulic cylinder support device.

[0006] The technical concept of this utility model is as follows: by using a modular bracket with multi-stage pin holes, combined with a pin-inserting cylinder and a pin-pulling bolt with a temporary support structure, the installation and disassembly of heavy-duty vertical pin shafts can be completed safely and efficiently through a mechanical, graded insertion and removal method using a "pull-temporary fixation-stage replacement" cyclic operation. This overcomes the dependence of traditional methods on large hoisting equipment and is applicable to a wider range of scenarios.

[0007] To achieve the aforementioned objectives of this utility model, the specific technical solution adopted by this utility model is as follows: a vertical through-pin hydraulic cylinder support device, comprising:

[0008] The main structure of the bracket has a U-shaped channel steel structure in cross-section. One end is provided with a fixing hole, and multiple reserved holes and pin holes are provided on both sides at equal intervals. The reserved holes are located between the fixing hole and the pin holes.

[0009] A pin-driven hydraulic cylinder has an insertion hole at its bottom end, which is connected to the pin hole by a pin to fix the bottom end of the pin-driven hydraulic cylinder.

[0010] The pull pin bolt has a threaded section at one end for screwing into the pin shaft, and a single lug is welded to the other end.

[0011] The protruding end of the pin-piercing cylinder is welded with double lugs, which are detachably connected to the single lug of the pin-pulling bolt via a connecting pin.

[0012] A strut is used to temporarily support the weight of the pin shaft by passing through the pre-drilled hole and the hole plate welded to the pull pin bolt during stage replacement.

[0013] Furthermore, the distance between adjacent pre-drilled holes is equal to the distance between adjacent pin holes. This structure ensures precise alignment of the support rod and pin during stage replacement operations, solving the installation difficulties and uneven force distribution problems caused by hole position deviations, thereby guaranteeing the smoothness and stability of the multi-stage insertion and removal process.

[0014] Furthermore, two perforated plates are welded onto the pull pin bolt, and the perforated plates have through holes for the support rod to pass through. This design, through the cooperation of the support rod and the perforated plates, reliably transfers the weight of the pin to the main structure of the bracket during stage changes, effectively solving the risk of the pin falling due to its own weight after the hydraulic cylinder is unloaded, and achieving safe temporary fixation during operation.

[0015] Furthermore, the main structure of the bracket is bolted to a fixing plate welded to the main structure of the equipment via fixing holes. This connection method allows the entire device to be easily fixed to the main body of the equipment, solving the stability problem of the device itself being prone to movement or overturning during installation and dismantling operations, and providing a stable force application foundation for the through-pin cylinder.

[0016] Furthermore, the pin-insertion cylinder is connected to pin holes of different heights via pins to achieve multi-stage insertion and removal operations. By selecting pin holes of different heights to fix the cylinder, the entire insertion and removal stroke is decomposed into multiple controllable short strokes, solving the problem that the cylinder's single stroke is limited and cannot handle the full installation and removal of long and heavy pins. This achieves effective utilization of the short-stroke cylinder and safe, tiered operation of large-size pins.

[0017] Furthermore, the device is suitable for installing and removing pins at any spatial angle. This makes the application of this invention no longer limited to pins in the vertical direction. By flexibly adjusting the device's posture, it solves the problems of difficult installation and removal of non-vertical pins and lack of special tools in the prior art, significantly broadening the applicability and versatility of the device.

[0018] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0019] This utility model provides a vertical pin-insertion cylinder support device, which successfully replaces the reliance on large lifting equipment such as overhead cranes or hoists in traditional installation and dismantling operations through a mechanized and modular specialized tool. The device innovatively adopts a "multi-stage replacement" operation method, combining a temporary fixing mechanism composed of a support rod and a perforated plate to decompose the pin insertion and removal process into multiple safe short strokes. In each replacement step, the weight of the pin can be reliably and temporarily supported on the main support structure, thus completely solving the safety hazard of heavy pins potentially falling due to their own weight during installation and dismantling. This not only greatly improves operational safety but also frees installation and dismantling operations from the constraints of large equipment's working area and scheduling, making it particularly suitable for outdoor and narrow spaces where large lifting equipment is difficult to access or occupy for extended periods, significantly expanding its applicable scenarios.

[0020] This device demonstrates exceptional versatility and economy. Its main support structure features multiple pre-set sets of equidistant pin holes and reserved holes, allowing a single pin-operated cylinder to adapt to different stroke insertion and removal requirements by adjusting the pin position. This achieves efficient utilization of low-power cylinders and reduces equipment costs. Furthermore, through simple posture adjustments, the device can be applied to pins at any spatial angle, overcoming the limitation of traditional methods that can only effectively handle vertical pins. The overall structure is simple, operation is convenient, and it does not rely on an external power source. While improving maintenance efficiency, it also avoids the resource waste caused by prolonged occupation of large hoisting equipment, resulting in significant overall economic benefits. Attached Figure Description

[0021] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof.

[0022] Figure 1 This is a schematic diagram of the overall structure of the present invention during operation.

[0023] Figure 2 This is a schematic diagram of the pull-out bolt in this utility model.

[0024] The attached diagram is labeled as follows: 1. Main structure of the support; 2. Through-pin cylinder; 3. Pull-out bolt; 4. Pin; 5. Support rod; 6. Orifice plate; 7. Reserved hole; 8. Pin hole; 9. Main structure of the equipment; 10. Pin shaft; 11. Fixing plate; 12. Single ear ring; 13. Fixing hole. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. Of course, the specific embodiments described herein are only for explaining this utility model and are not intended to limit it.

[0026] Example

[0027] See Figures 1-2 As shown, this embodiment provides a vertical pin-driven hydraulic cylinder support device, which is mainly used for the safe and efficient installation or removal of heavy-duty vertical pins 10 on large equipment such as tower cranes. The entire device is fixed to the main structure 9 of the equipment with bolts. Its core function is to replace traditional large hoisting equipment through "multi-stage" mechanical operation, realize the effective utilization of small-stroke pin-driven hydraulic cylinders 2, and ensure that the pins 10 can be reliably and temporarily fixed during operation, eliminating the risk of falling.

[0028] The following details the specific structure, connection relationships, and functions of each component of this device:

[0029] The main support structure 1 serves as the installation foundation and load-bearing frame for the entire device. It is constructed from U-shaped channel steel, a structure with excellent bending and torsional resistance, capable of withstanding the significant weight and operating torque transmitted from the pin 10. At the end of the main support structure 1 closest to the main equipment structure 9, a pair of opposing fixing holes 13 are provided on its two side walls. Through these fixing holes 13 and using high-strength bolts, the main support structure 1 can be securely connected to two fixing plates 11 pre-welded to the main equipment structure 9. This bolted connection method solves the stability problem of the device itself being prone to movement or overturning during installation and dismantling operations, providing a stable force-bearing foundation for the pin-driven hydraulic cylinder 2.

[0030] On the main body of both side walls of the support structure 1, multiple reserved holes 7 and multiple pin holes 8 are respectively provided. These holes are arranged in an equidistant manner, and the center distance between two adjacent reserved holes 7 is exactly equal to the center distance between two adjacent pin holes 8. This careful equidistant alignment design ensures that during subsequent stage replacement operations, the support rod 5 and the pin 4 can accurately and quickly find the corresponding hole positions, solving the problems of installation difficulties and uneven force caused by hole position deviations, thus ensuring the smoothness and stability of the entire multi-stage insertion and removal process. From a spatial position perspective, in the working state, the pin holes 8 are located on the upper side of the support structure 1, the reserved holes 7 are located on the lower side, and the fixing holes 13 are located at the end closest to the equipment.

[0031] The pin-insertion cylinder 2 is the driving component of this device, responsible for providing the linear power required for inserting and removing the pin 10. It has a transverse insertion hole at its bottom. By passing a pin 4 through both a selected pin hole 8 on the main support structure 1 and this insertion hole at the bottom of the cylinder, the bottom of the pin-insertion cylinder 2 can be hinged and fixed to the main support structure 1. This connection method allows the pin-insertion cylinder 2 to swing slightly under force to accommodate possible alignment errors. A double lug is welded to the protruding end of the piston rod of the pin-insertion cylinder 2 for connection with the subsequent pin-removal bolt 3. Crucially, the pin-insertion cylinder 2 can connect to pin holes 8 at different heights on the main support structure 1 via the pin 4. This design breaks down the entire long pin insertion and removal stroke into multiple controllable short strokes, solving the problem that a single cylinder's limited stroke cannot handle the full installation and removal of long and heavy pins. This achieves efficient utilization of the short-stroke cylinder and safe, tiered operation for large-size pins.

[0032] The pull-out bolt 3 is a key component connecting the through-pin cylinder 2 and the operating pin 10. It consists of a high-strength bolt with a threaded section at one end for direct screwing into the pre-drilled threaded hole at the top of the pin 10, forming a reliable force transmission connection. A single lug 12 is welded to the other end. This lug 12 is detachably hinged to the double lug at the protruding end of the through-pin cylinder 2 via a connecting pin. Thus, the extension and retraction of the through-pin cylinder 2 can be directly converted into pulling or pushing actions on the pin 10. Furthermore, two perforated plates 6 are symmetrically welded to the bolt shank of the pull-out bolt 3. Each perforated plate 6 has a through hole. This arrangement constitutes the core safety mechanism of this device—the temporary support mechanism. During the stage change, by passing the strut 5 through the pre-drilled hole 7 on the main structure 1 of the bracket and the through holes on the two hole plates 6, the entire weight of the pin 10 can be reliably transferred and supported on the sturdy main structure 1 of the bracket. This effectively solves the huge safety risk of the pin suddenly falling due to its own weight when disassembling the hydraulic cylinder connection, and achieves the crucial safety temporary fixation during the operation.

[0033] The strut 5 is typically a solid round steel bar or a pin of sufficient strength, which acts as a "safety pin" in the aforementioned temporary fixing mechanism. Its length must be sufficient to smoothly pass through the two side walls and the central perforated plate 6 of the main support structure 1.

[0034] Work process

[0035] The following section uses the disassembly of a heavy-duty vertical pin 10 as an example to illustrate the working process of this device.

[0036] Preliminary preparation and fixation: First, weld a fixing plate 11 to the main structure 9 of the equipment located on both sides of the pin 10 to be disassembled. Then, place the end of the main support structure 1 of this device with the fixing hole 13 on the main structure 9 of the equipment, align the fixing hole 13 with the fixing plate 11, and tighten it with high-strength bolts to complete the reliable fixation of the entire device.

[0037] Initial connection: Insert pin 4 into the pin hole 8 at the bottom of the main structure 1 of the bracket, and simultaneously pass it through the insertion hole at the bottom of the pin-piercing cylinder 2 to fix the bottom of the cylinder. Extend the piston rod of the pin-piercing cylinder 2 completely. Screw the threaded end of the pin-pulling bolt 3 into the threaded hole at the top of the pin shaft 10 and tighten it. Finally, use a connecting pin to connect the double lugs at the top of the pin-piercing cylinder 2 to the single lug 12 of the pin-pulling bolt 3.

[0038] First stage of pulling: Activate the through-pin cylinder 2, causing its piston rod to retract. The pulling force of the cylinder is transmitted to the pin shaft 10 through the pull-out bolt 3, causing it to move upwards, disengaging from the original pin hole by a distance (this distance is less than or equal to the single stroke of the cylinder). After the piston rod retracts to the bottom, the first stage of pulling is completed.

[0039] First stage change (temporary fixation and cylinder reset):

[0040] Temporary fixation: Pass the support rod 5 through the pre-drilled hole 7 on the main structure 1 of the bracket, corresponding to the height of the hole plate 6 of the current pin-pulling bolt 3, and ensure that the support rod 5 passes through the through holes on both hole plates 6 at the same time. At this time, the entire weight of the pin shaft 10 is transferred to the support rod 5 through the pin-pulling bolt 3 and the hole plate 6, and then transferred to the main structure 1 of the bracket by the support rod 5. The pin shaft is safely and temporarily fixed, and the pin-pulling cylinder 2 is no longer under force.

[0041] Disconnection: Remove the connecting pin of the single ear ring 12 of the connecting pin cylinder 2 and the pin bolt 3 to separate them.

[0042] Hydraulic cylinder reset: Pull out the pin 4 at the bottom of the pin-fixed hydraulic cylinder 2, and then fully extend the piston rod of the pin-fixed hydraulic cylinder 2 again. Move the pin 4 upward and insert it into the pin hole 8 of the next higher position, while simultaneously passing it through the insertion hole at the bottom of the hydraulic cylinder, thereby fixing the hydraulic cylinder in a new, higher starting position.

[0043] Reconnect: Use the connecting pin again to connect the double lugs at the top of the through-pin cylinder 2 to the single lug 12 of the pull-out bolt 3.

[0044] Release the temporary fixation: Pull the support rod 5 out of the reserved hole 7 and the perforated plate 6.

[0045] Cyclic operation: Repeat steps 3 and 4. That is, the hydraulic cylinder retracts again, pulling the pin 10 upward a certain distance; then the support rod 5 is temporarily inserted again for fixation; then the hydraulic cylinder connection is disconnected, the bottom pin 4 of the hydraulic cylinder is moved to the pin hole 8 of the next higher level for fixation, and after reconnection, the support rod 5 is pulled out for the next round of pulling. This "pulling-temporary fixation-level change" cycle is repeated until the pin 10 is completely pulled out.

[0046] The installation process for the pin shaft follows the same principle, except that the movement direction of the pin-inserting cylinder 2 is reversed, pushing the pin shaft 10 into the pin hole step by step. After each stage of pushing is completed, it is also necessary to temporarily fix it using the support rod 5 and the hole plate 6, then adjust the position of the cylinder, and then push it to the next stage.

[0047] Finally, it should be emphasized that this device, by flexibly adjusting its overall installation posture, can be applied to the installation and removal of pins at any spatial angle, not just in the vertical direction. This greatly expands the application scope of this invention, solves the problems of difficult installation and removal of non-perpendicular pins and lack of specialized tools in the prior art, and significantly improves the versatility of the device.

[0048] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A vertical through-pin hydraulic cylinder support device, characterized in that, include: The main structure of the bracket (1) has a U-shaped channel steel structure in cross section. One end is provided with a fixing hole (13), and multiple equidistant reserved holes (7) and pin holes (8) are provided on both sides. The reserved holes (7) are located between the fixing hole (13) and the pin holes (8). The bottom end of the pin-piercing cylinder (2) is provided with an insertion hole, which is connected to the pin hole (8) by a pin (4) to fix the bottom end of the pin-piercing cylinder (2); The pull pin bolt (3) has a threaded section at one end for screwing into the pin shaft (10), and a single lug (12) is welded to the other end. The protruding end of the pin-piercing cylinder (2) is welded with double lugs, which are detachably connected to the single lug (12) of the pin-pulling bolt (3) via a connecting pin. A strut (5) is used to temporarily support the weight of the pin (10) by passing through the pre-drilled hole (7) and the hole plate (6) welded to the pull pin bolt (3) during stage replacement.

2. The vertical through-pin hydraulic cylinder support device according to claim 1, characterized in that, The distance between adjacent reserved holes (7) is equal to the distance between adjacent pin holes (8).

3. The vertical through-pin hydraulic cylinder support device according to claim 1, characterized in that, Two perforated plates (6) are welded onto the pull pin bolt (3), and the perforated plates (6) are provided with through holes for the support rod (5) to pass through.

4. The vertical through-pin hydraulic cylinder support device according to claim 1, characterized in that, The main structure (1) of the bracket is bolted to the fixing plate (11) welded to the main structure (9) of the equipment through fixing holes (13).

5. A vertical through-pin hydraulic cylinder support device according to claim 1, characterized in that, The pin-insertion cylinder (2) is connected to pin holes (8) of different heights via pins (4) to realize multi-stage insertion and removal operations.

6. The vertical through-pin hydraulic cylinder support device according to claim 1, characterized in that, The device is suitable for the installation and removal of pins at any spatial angle.

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