Tower head of luffing jib tower crane

Abstract

The utility model discloses a tower head of a luffing jib tower crane, which relates to the technical field of engineering machinery and comprises a front support frame, a rear support rod, an inclined support rod, a locking device, a pin shaft, a cotter pin, a lock pin, a spring pin and a support leg, one end of the inclined supporting rod is connected with the middle of the front supporting frame through a pin shaft, and the other end of the inclined supporting rod is connected with the bottom of the rear supporting rod through a pin shaft. During folding, the inclined supporting rod and the rear supporting rod are folded to the front supporting frame around a hinge point and are fixed through a locking device. The front supporting frame, the rear supporting rod and the inclined supporting rod are hinged through the pin shafts, and the tower head is rapidly folded and fixed in cooperation with the locking device. The tower head is integrally transported after being folded, and space and cost are saved; and stable placement and efficient loading and unloading are supported by supporting leg and horizontal lifting point design. The system obviously simplifies the mounting and dismounting process, improves the construction efficiency, and is suitable for the modular transportation requirement of the large tower crane.

Description

TECHNICAL FIELD

[0001] The utility model relates to engineering machinery technical field, concretely is a tower head of luffing tower crane, and especially is applicable to the quick folding, integral transportation and efficient installation and disassembly operation of tower head. BACKGROUND

[0002] In the use of tower crane, the tower head (namely A type frame structure) is the key component of supporting the luffing boom and the counter jib, the conventional tower head transportation mode needs to split it into multiple components, reassembles after transportation to the construction site, and there are the following problems:

[0003] 1. Low transportation efficiency: the number of components after splitting is large, occupies large transportation space, and needs multiple loading and unloading, and the cost is high;

[0004] 2. Complex installation and disassembly process: needs to disassemble again after factory trial assembly, and the on-site assembly consumes time and energy, and influences construction progress;

[0005] 3. Poor structural stability: multiple disassembly and assembly can easily lead to component wear or connection loosening, and hides safety hazards;

[0006] In view of the above problems, a technical scheme capable of realizing the integral folding transportation of tower head, simplifying the installation and disassembly process and being structurally stable is urgently needed. INVENTION CONTENTS

[0007] The utility model aims at providing a luffing tower crane tower head folding system, and realizes the quick folding, integral transportation and one-key installation and disassembly of the tower head through optimizing the structure design and locking device, significantly reduces the transportation cost, and improves construction efficiency.

[0008] In order to achieve the above object, the utility model adopts the following technical scheme:

[0009] A luffing tower crane tower head, which comprises a front support frame, a rear support rod, an inclined support rod, a locking device, a pin shaft, a split pin, a lock pin, a spring pin and a supporting leg, the front support frame and the rear support rod are hinged through an upper pin shaft, one end of the inclined support rod is connected to the middle part of the front support frame through a pin shaft, and the other end is connected to the bottom of the rear support rod through a pin shaft, when folding, the inclined support rod and the rear support rod are folded to the front support frame around the hinge point, and are fixed through the locking device.

[0010] Further, the utility model provides a luffing tower crane tower head, wherein the front support frame locking device comprises a single ear plate and a rib plate welded to the front support frame, the single ear plate is provided with a lock hole matched with the pin shaft, and the rib plate is used for enhancing the strength of the single ear plate.

[0011] Further, the utility model provides a luffing tower crane tower head, wherein the rear support rod locking device comprises a pasting plate, a rib plate and a T-shaped reinforcing plate, the pasting plate is provided with a plurality of lock holes, and the holes are used for inserting the lock pin to fix the rear support rod after folding.

[0012] Further, the application provides a tower head of a luffing tower crane, wherein the support legs are arranged at the bottom of the front support frame, and the folded tower head is horizontally placed on the ground through the support legs; the front support frame is provided with a horizontal lifting lifting point, which is suitable for horizontal container transportation.

[0013] Further, the application provides a tower head of a luffing tower crane, wherein the lock pin is used in cooperation with the spring pin, the spring pin fixes the position of the lock pin after the lock pin is inserted into the hole of the rear support rod locking device, and the lock pin is prevented from being loosened during transportation.

[0014] The core innovation points are as follows:

[0015] 1. Modular folding structure: the front support frame, the rear support rod and the inclined support rod are hinged through pin shafts to form a foldable A-shaped frame. When the tower is disassembled, the inclined support rod and the rear support rod can be folded to the front support frame around the hinge point to form a compact transportation unit.

[0016] 2. Locking device design: the front support frame locking device is composed of a single ear plate and a rib plate, and the rear support rod locking device includes a backing plate, a rib plate and a T-shaped reinforcing plate, so that the folded structure is stable.

[0017] 3. Quick switching mechanism: the switching between the working state and the folded state is realized by pulling out and inserting the pin shaft and the lock pin, which is simple to operate and does not require complex tools.

[0018] 4. Integration of support legs and lifting points: the tower head is provided with support legs for horizontal placement after folding, and the front support frame is provided with horizontal lifting lifting points, which are suitable for container transportation.

[0019] Compared with the prior art, the application has the following advantages:

[0020] 1. Improved transportation efficiency: the folded tower head is transported as a whole, the number of disassembled modules is reduced, and the transportation space is saved by more than 40%.

[0021] 2. Shortened assembly and disassembly time: the folding or unfolding can be completed by pulling out and inserting the pin shaft, and the time consumption of the assembly and disassembly process is reduced by 60%.

[0022] 3. Strong structural stability: the locking device adopts a welded reinforcing structure to avoid loosening or deformation of the components during transportation.

[0023] 4. Significant cost reduction: labor costs and multiple transportation costs are reduced, and the comprehensive cost is reduced by more than 30%. BRIEF DESCRIPTION OF DRAWINGS

[0024] Fig. 1 Fig. 1 is a schematic diagram of the overall structure of the working state of the tower head of the luffing tower crane, showing an A-shaped frame formed by the hinging of the front support frame, the rear support rod and the inclined support rod through pin shafts;

[0025] Fig. 2It is a schematic diagram of a tower head disassembled state of a luffing tower crane, which shows that the truck crane is disassembled from the tower head through the integral lifting point, and the front support frame is used as a hinge point to support the ground;

[0026] Fig. 3 It is a schematic diagram of a diagonal support rod folding in the tower head of the luffing tower crane, which shows the process of folding the diagonal support rod around the hinge point to the front support frame and locking it with the pin shaft;

[0027] Fig. 4 It is a schematic diagram of a rear support rod folding and locking device in the tower head of the luffing tower crane, which shows that the rear support rod is folded around the hinge point and fixed to the diagonal support rod through the lock pin and spring pin after folding;

[0028] Fig. 5 It is a schematic diagram of a tower head flat folding of the luffing tower crane, which shows that the folded tower head is placed horizontally on the ground through the supporting leg;

[0029] Fig. 6 It is a schematic diagram of a tower head packing of the luffing tower crane, which shows that the flat lifting lifting point of the front support frame is adapted to container transportation.

[0030] Wherein: 1, front support frame; 2, rear support rod; 3, diagonal support rod; 4, pin shaft a; 5, split pin; 6, lock pin; 7, spring pin; 8, upper pin shaft; 9, pin shaft b; 10, integral lifting point; 11, front support frame locking device; 12, single ear plate; 13, rib plate; 14, rear support rod locking device; 15, paste plate; 16, rib plate; 17, T-shaped reinforcing plate; (18-21), lock hole; 22, supporting leg; 23, flat lifting lifting point. DETAILED DESCRIPTION

[0031] The technical scheme in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0032] In the description of the present application, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as limiting the devices or elements referred to have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0033] In the description of the utility model, it is necessary to explain that, unless there are explicit provisions and limitations, the terms "mounting", "providing", "connection" and the like should be understood broadly, for example, "connection" can be fixed connection, can also be detachable connection, or integrally connected; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according of the specific circumstances.

[0034] As Figs. 1-6 The utility model provides a movable arm tower crane tower head, it includes front support frame 1, rear support rod 2, inclined strut 3, locking device 11, 14, pin shaft 4, split pin 5, lock pin 6, spring pin 7 and outrigger 22, front support frame 1 with rear support rod 2 is hinged through upper pin shaft 8, and one end of inclined strut 3 is connected with the middle part of front support frame 1 through pin shaft b 9, and the other end is connected with the bottom of rear support rod 2 through pin shaft a 4, when folding, inclined strut 3 and rear support rod 2 are folded to front support frame 1 around hinge point, and are fixed through locking device 11, 14,

[0035] Wherein: the front support frame locking device 11 includes single lug plate 12 and muscle plate 13 welded to front support frame 1, single lug plate 12 is equipped with lock hole matched with pin shaft a 4, and muscle plate 13 is used to enhance the strength of single lug plate;

[0036] The rear support rod locking device 14 includes the plate 15, the muscle plate 16 and the T-shaped reinforcing plate 17, the plate 15 is equipped with a plurality of lock holes 18, 19, 20, 21, and the hole 21 is used to be inserted into the lock pin 6 to fix the rear support rod 2 after folding;

[0037] The outrigger 22 is arranged at the bottom of the front support frame 1, and the tower head is placed horizontally on the ground through the outrigger 22 after folding, and the front support frame 1 is provided with a flat lifting lifting point 23, which is matched with container horizontal transportation;

[0038] The lock pin 6 is used in cooperation with the spring pin 7, after the lock pin 6 is inserted into the hole 21 of the rear support rod locking device 14, the spring pin 7 fixes the position of the lock pin, to prevent loosening during transportation.

[0039] 1. Working state structure

[0040] As Fig. 1 When the tower head is in working state, the front support frame 1 is hinged with the rear support rod 2 through the upper pin shaft 8, one end of the inclined strut 3 is fixed to the middle part of the front support frame 1 through the pin shaft b 9, the other end is connected with the bottom of the rear support rod 2 through the pin shaft a 4, and together constitutes a stable A-shaped frame structure. The lock pin 6 is inserted into the lock hole 18 of the rear support rod locking device 14, to ensure the rigid connection of the rear support rod 2 and the inclined strut 3.

[0041] 2. Disassembly and folding process

[0042] 1) disassembly of tower head: as shown in Fig. 2 , using the whole lifting point 10 of the tower head connected by the automobile crane, the tower head is lifted from the balance arm. Because the lifting point is close to the rear of the center of gravity, the front support frame 1 first contacts the ground and serves as a folding hinge point.

[0043] 2) folding diagonal bracing: as shown in Fig. 3 , remove the pin shaft a4 connecting the diagonal bracing 3 and the rear bracing 2, fold the diagonal bracing 3 around the upper end hinge point pin shaft b9 to the front support frame 1, and insert the pin shaft a4 into the single ear plate 12 hole of the front support frame locking device 11 to fix it.

[0044] 3) folding rear bracing: as shown in Fig. 4 , remove the lock pin 6 in the lock hole 18 of the rear bracing 2 locking device 14, fold the rear bracing 2 around the upper hinge point upper pin shaft 8 to the front support frame 1, then insert the lock pin 6 into the lock hole 21 and lock it through the spring pin 7, forming a compact folded state.

[0045] 3. folding and placing and transporting

[0046] 1) horizontal placement: as shown in Fig. 5 , the folded tower head is stably placed on the ground through the supporting leg 22 at the bottom of the front support frame 1, avoiding the wear caused by the contact of the components with the ground.

[0047] 2) packing and transporting: as shown in Fig. 6 , use the flat lifting point 23 of the front support frame 1 to horizontally lift and install the folded tower head into a standard container, significantly reducing the space occupied by transportation.

[0048] 4. site deployment and installation

[0049] After transportation to the site, reverse the above process:

[0050] 1) lift the tower head out of the container through the flat lifting point 23 and place it on the ground.

[0051] 2) use the whole lifting point 10 connected by the automobile crane to lift the tower head, with the bottom of the front support frame 1 as the hinge point, gradually lift it to the installation angle.

[0052] 3) remove the lock pin 6 and spring pin 7 of the rear bracing 2 and diagonal bracing 3, and the rear bracing 2 and diagonal bracing 3 are automatically unfolded to the working state due to gravity.

[0053] 4) reinsert the pin shaft a4 to fix the diagonal bracing 3 and the rear bracing 2, complete the installation of the tower head.

[0054] The parts not described in the utility model are known to those skilled in the art.

[0055] The preferred embodiments of the present application are described in detail above. It should be understood that those skilled in the art can make many modifications and changes without creative work according to the concept of the present application. Therefore, any technical solutions obtained by logical analysis, reasoning or limited experiments on the basis of the prior art according to the concept of the present application shall be within the protection scope defined by the claims.

Claims

1. A luffing tower crane tower head, characterized in that The utility model relates to a folding container tower, which comprises a front support frame (1), a rear support rod (2), an inclined support rod (3), locking devices (11, 14), a pin shaft (4), a split pin (5), a locking pin (6), a spring pin (7) and a support leg (22). The front support frame (1) and the rear support rod (2) are hingedly connected through an upper pin shaft (8), one end of the inclined support rod (3) is connected to the middle of the front support frame through a pin shaft (9), and the other end is connected to the bottom of the rear support rod through a pin shaft (4). When folding, the inclined support rod (3) and the rear support rod (2) are folded around the hinge point to the front support frame (1) and are fixed through the locking devices (11, 14).

2. A luffing tower crane tower head according to claim 1, characterized in that The front support frame locking device (11) comprises a single lug plate (12) and a rib plate (13) welded to the front support frame (1), the single lug plate (12) is provided with a locking hole matched with the pin shaft (4), and the rib plate (13) is used for enhancing the strength of the single lug plate.

3. A luffing tower crane tower head according to claim 1, characterized in that The rear support rod locking device (14) comprises a pasting plate (15), a rib plate (16) and a T-shaped reinforcing plate (17), the pasting plate (15) is provided with a plurality of locking holes (18, 19, 20, 21), and the hole (21) is used for inserting the locking pin (6) to fix the rear support rod (2) after folding.

4. A luffing tower crane tower head according to claim 1, characterized in that The support leg (22) is arranged at the bottom of the front support frame (1), and the tower head is placed horizontally on the ground through the support leg (22) after folding; the front support frame (1) is provided with a flat lifting lifting point (23) matched with the horizontal transportation of the container.

5. The jib tower crane tower head of claim 1, wherein, The locking pin (6) is used in cooperation with the spring pin (7), the spring pin (7) fixes the position of the locking pin (6) after being inserted into the hole (21) of the rear support rod locking device (14), so that the locking pin is prevented from loosening during transportation.

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