Assembled lifting rod and mobile lighting lighthouse

Abstract

The utility model relates to mobile lighting field discloses an assembly type lifting rod and mobile lighting lighthouse, the lifting rod includes the pole body and the steel wire rope of control pole body lift by n section square steel, the top of first section to n-1 section square steel all is provided with the pulley support, is equipped with the pulley on the pulley support, the pulley support is composed of left support and right support, and the shape of left and right support is same, and is composed of bottom plate and the side plate of being equipped with in bottom plate both sides and the lug plate of being equipped with in side plate end portion and with bottom plate parallel, the pulley is installed between the lug plate of left and right support, the bottom plate and both side plates of left and right support are all fixed mounting on square steel through fastener, the fastener includes steel ball bolt and locking nut, and steel ball bolt passes through the mounting hole on left and right support and is screwed through square steel, and the square steel outer wall in this square steel is abutted, and locking nut is used for locking left and right support on steel ball bolt. The utility model does not need welding operation, still can adjust the concentricity of square steel and reduce the assembly error of pole body accumulation.

Description

Technical Field

[0001] This utility model relates to the field of mobile lighting, and in particular to a prefabricated lifting pole and a mobile lighting tower. Background Technology

[0002] The existing mobile lighting tower's lifting mast is shown in the attached image. Figure 1 To be continued Figure 3 As shown, the rod 10 consists of n sections of square steel 1 connected in sequence, and a steel wire rope 2 for controlling the lifting and lowering of the rod 10. Square flange plates 3 are welded to the top of the first to (n-1)th sections of square steel 1. A pulley bracket 4 is welded between the flange plate 3 and the square steel 1. Two sets of limiting plates 5.1, each consisting of eight pads, are installed around the bottom of the second to nth sections of square steel 1. The pads are welded to the sides of the square steel 1 by overlay welding. A baffle 6 is fixedly installed on the top of the flange plate 3 for use with... The limiting plate 5' works together to prevent the square steel from detaching. The pulley bracket 4 is equipped with a pulley 7. One end of the main pulling wire rope 2.1 is connected to the winch, and the other end passes over the pulley on the first section of square steel and connects to the base plate 8 welded to the bottom end of the second section of square steel. One end of the traction wire rope 2.2 is fixed to the pulley bracket 4 on the first section of square steel, and the other end passes over the pulley on the second section of square steel and connects to the base plate 8 welded to the bottom end of the third section of square steel. In this way, the linkage of n sections of square steel is completed, realizing the lifting and lowering of the pole.

[0003] Existing mobile lighting towers have the following drawbacks in their boom lifts:

[0004] 1. A flange plate needs to be welded to the top of the square steel to facilitate the installation of the baffle and pulley bracket. The pulley bracket consists of two parallel ear plates welded between the flange plate and the square steel. Due to the structural deformation caused by welding heat stress during the welding process, the parallelism deviation of the flange plate is >2mm and the concentricity error of the holes of the two ear plates is >1mm, which will cause pulley offset, cable eccentric loading and fatigue fracture.

[0005] 2. The flange plate, pulley bracket, multiple pads, and base plate used for connecting with the wire rope are all welded, and the manual welding cost accounts for more than 35% of the manufacturing cost.

[0006] 3. The concentricity between the square steel bars of the pole cannot be adjusted. The cumulative assembly error of the pole results in a large deviation in the overall straightness when it is raised to its longest state. This causes the steel cable to undergo torsional deformation under vertical load, resulting in fatigue cracks of varying degrees in the steel cable.

[0007] Based on this, this application provides an assembled lifting rod with low manufacturing cost and adjustable rod concentricity to solve the above problems. Utility Model Content

[0008] The present invention aims to solve the technical problems existing in the prior art. Therefore, the present invention provides a prefabricated lifting mast with low manufacturing cost and adjustable concentricity, as well as a mobile lighting tower equipped with the lifting mast.

[0009] The technical solution adopted by this utility model to solve its technical problem is:

[0010] In a first aspect, a prefabricated lifting rod is provided, comprising a rod body composed of n sections of square steel connected in sequence and a steel wire rope for controlling the lifting and lowering of the rod body. Each of the top sides of the first to (n-1)th sections of square steel is provided with a pulley bracket, and pulleys are provided on the pulley brackets. The pulley bracket consists of a left bracket on one side of the square steel and a right bracket on the other side of the square steel. The left and right brackets have the same shape, each consisting of a base plate, side plates perpendicular to both sides of the base plate, and ear plates perpendicular to the ends of the side plates and parallel to the base plate. The pulleys are installed between the ear plates of the left and right brackets. The base plate and side plates of the left and right brackets are fixedly installed on the square steel by multiple sets of fasteners. The fasteners include ball bolts and locking nuts. The ball bolts pass through mounting holes on the left or right bracket and are threaded through the square steel, abutting against the outer wall of the square steel within the square steel. The locking nuts are used to lock the left or right bracket onto the ball bolts.

[0011] In some alternative embodiments, the outer wall of the end of the square steel from the 2nd to the nth section away from the pulley bracket is provided with two sets of limiting adjustment plates, one set of limiting adjustment plates is located at the bottom end of the square steel, and the other set of limiting adjustment plates is located at 1 / 3 of the square steel near the bottom end.

[0012] In some alternative embodiments, each set of the limiting adjustment plates consists of two symmetrically arranged limiting plates, which are "C"-shaped plates that match the surface of the square steel, and the gap between the two limiting plates is greater than twice the diameter of the wire rope.

[0013] In some alternative embodiments, the limiting plate in the limiting adjustment plate located at the bottom end of the square steel is provided with a tie plate that bends horizontally toward the inside of the square steel for fixed connection with the wire rope.

[0014] In some alternative embodiments, the thickness of the limiting adjustment plate is such that the gap between it and the outer square steel is 0.1 to 0.5 mm.

[0015] In some alternative embodiments, the top of the first to n-1th square steel sections is provided with a first clearance groove for the clearance wire rope, and the bottom of the second to nth square steel sections is provided with a second clearance groove for the clearance wire rope.

[0016] Secondly, a mobile lighting tower equipped with the aforementioned prefabricated lifting mast is provided.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] 1. The pulley bracket designed in this utility model can be fixed to the square steel with fasteners without welding, which can effectively reduce production costs and eliminate the problem of hole concentricity error caused by welding deformation. At the same time, the designed fasteners can also use steel ball bolts to adjust the gap between the inner and outer square steel to adjust their concentricity, thereby reducing the cumulative assembly error of the rod and greatly reducing the probability of fatigue cracks caused by torsional deformation of the steel cable under vertical load.

[0019] 2. Both sets of limit adjustment plates are bolted, eliminating the need for welding, reducing production costs and shortening the production cycle; at the same time, the tie plate connected to the wire rope and the adjustment plate are designed as an integrated structure, simplifying the assembly process. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model, the 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, wherein:

[0021] Figure 1 This is a schematic diagram of the existing lifting boom structure;

[0022] Figure 2 yes Figure 1 Provided sectional view;

[0023] Figure 3 This is a structural diagram of a section of square steel inside an existing lifting boom;

[0024] Figure 4 This is a structural schematic diagram of the assembled lifting rod provided by this utility model;

[0025] Figure 5 This is a sectional view of the assembled lifting rod provided by this utility model;

[0026] Figure 6 This is a structural schematic diagram of a section of square steel inside the assembled lifting rod provided by this utility model;

[0027] Figure 7 yes Figure 6 The provided top view;

[0028] Figure 8 yes Figure 6 The provided bottom view.

[0029] The attached diagram lists the components represented by each number as follows:

[0030] 1—Square steel, 1.1—First clearance groove, 1.2—Second clearance groove, 2—Wire rope, 2.1—Main pull wire rope, 2.2—Traction wire rope, 3—Flange plate, 4—Pulley bracket, 4.1—Left bracket, 4.2—Right bracket, 5—Limit adjustment plate, 5.1—Limit plate, 5.2—Tie plate, 6—Baffle, 7—Pulley, 8—Base plate, 9—Fasteners, 9.1—Steel ball bolt, 9.2—Locking nut, 10—Rod body. Detailed Implementation

[0031] It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0032] 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.

[0033] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0034] Furthermore, the terms "installation," "connection," and "linking" used in this utility model should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0035] Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0036] Example 1

[0037] As attached Figure 4 and attached Figure 5As shown, this embodiment provides a prefabricated lifting rod, including a rod body 10 composed of n sections of square steel 1 connected in sequence and a steel wire rope 2 for controlling the lifting and lowering of the rod body 10. The top side of the first to the (n-1)th sections of square steel are provided with pulley brackets 4, and pulleys 7 are provided on the pulley brackets 4. The steel wire rope 2 controlling the lifting and lowering of the rod body is the prior art. Please refer to the background art for details.

[0038] As attached Figure 4 and attached Figure 6 As shown, the pulley bracket 4 in this embodiment consists of a left bracket 4.1 located on one side of the square steel 1 and a right bracket 4.2 located on the other side of the square steel. The left bracket 4.1 and the right bracket 4.2 have the same shape and are mirror-symmetrically arranged about the transverse or longitudinal central axis of the square steel. The gap between the left and right brackets should be slightly larger than the width of the pulley to ensure the normal operation of the pulley. Preferably, both the left bracket 4.1 and the right bracket 4.2 consist of a base plate, side plates perpendicular to both sides of the base plate, and an ear plate perpendicular to the end of one of the side plates and parallel to the base plate. The pulley 7 is installed between the ear plates of the left bracket 4.1 and the right bracket 4.2. The pulley bracket 4 designed in this embodiment is fixedly installed on the square steel 1 by fasteners 9. This detachable assembly structure can avoid thermal stress deformation caused by welding operations, reduce manufacturing costs, shorten manufacturing time, and facilitate the replacement of the pulley bracket, thus improving the interchangeability of parts. Specifically, the base plate and side plates of the left bracket 4.1 and the right bracket 4.2 are all fixedly installed on the square steel 1 by multiple sets of fasteners.

[0039] Preferred options are listed below. Figure 5 and attached Figure 6 As shown, the fastener 9 in this embodiment includes a ball bolt 9.1 and a locking nut 9.2. The ball bolt 9.1 passes through the mounting hole on the left bracket 4.1 or the right bracket 4.2 and is threaded through the square steel 1, abutting against the outer wall of the square steel inside. The locking nut 9.2 is used to lock the left bracket 4.1 or the right bracket 4.2 onto the ball bolt 9.1. This design, on the one hand, can use multiple fasteners to fix the pulley bracket to the square steel effectively; on the other hand, it can play a role in circumferentially limiting the internal square steel. By adjusting the tightening degree of the ball bolts around the outer square steel, the position of the internal square steel can be adjusted, thereby achieving the adjustment of the concentricity between the internal and external square steel. Since the end of the ball bolt has rolling balls that abut against the internal square steel, when the square steel is raised or lowered, the ball bolt and the internal square steel experience rolling friction, which does not affect the raising or lowering of the internal square steel.

[0040] For the anti-detachment design of the inner and outer square steel, see attached... Figure 6As shown, two sets of limiting adjustment plates 5 are provided on the outer wall of the end of the square steel 1 from the 2nd to the nth section away from the pulley bracket 4. One set of limiting adjustment plates 5 is located at the bottom end of the square steel 1, and the other set of limiting adjustment plates 5 is located at 1 / 3 of the distance from the bottom end of the square steel 1. Preferably, the thickness of the limiting adjustment plate 5 in this embodiment satisfies the requirement that the gap between it and the outer square steel is 0.1 to 0.5 mm. In this embodiment, because multiple ball bolts are provided around the top of the outer square steel that contact the inner square steel, the limiting adjustment plates on the inner square steel can be limited, preventing the inner square steel from coming out. At the same time, the limiting adjustment plate designed in this embodiment is a detachable installation structure, which can avoid welding operations, eliminate the gap between the inner and outer square steel, ensure their concentricity, and control the maximum extension length of each section of the rod by adjusting the position of the upper limiting adjustment plate.

[0041] Preferably, in this embodiment, each set of limiting adjustment plates 5 consists of two symmetrically arranged limiting plates 5.1. The limiting plates 5.1 are "C"-shaped plates that match the surface of the square steel, and the gap between the two limiting plates 5.1 is greater than twice the diameter of the wire rope 2 to facilitate the passage of the wire rope. The installation method of the two sets of limiting adjustment plates is shown in the attached figure. Figure 6 As shown.

[0042] Preferred options are listed below. Figure 6 and attached Figure 8 As shown in the figure, in this embodiment, the limiting plate 5.1 of the limiting adjustment plate 5 located at the bottom end of the square steel 1 is provided with a tie plate 5.2 that bends horizontally toward the inside of the square steel, for fixed connection with the wire rope. In this embodiment, the tie plate and the limiting plate are designed as one piece, which simplifies the assembly process.

[0043] Preferred options are listed below. Figure 5 and attached Figure 6 As shown, in order to facilitate the connection between the wire rope 2 and the inner and outer square steel, in this embodiment, a first clearance groove 1.1 is provided on the top of the first to n-1th square steel 1 to avoid the wire rope 2, and a second clearance groove 1.2 is provided on the bottom of the second to nth square steel 1 to avoid the wire rope 2.

[0044] Application examples

[0045] A mobile lighting tower is provided, which is equipped with the assembled lifting mast described in Embodiment 1.

[0046] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made using the content of this utility model specification, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A prefabricated lifting boom, comprising a boom body composed of n sequentially nested square steel sections and a steel wire rope for controlling the lifting and lowering of the boom body, wherein pulley brackets are provided on the top sides of the first to (n-1)th square steel sections, and pulleys are provided on the pulley brackets; characterized in that: The pulley bracket consists of a left bracket on one side of the square steel and a right bracket on the other side of the square steel. The left and right brackets have the same shape and each consists of a base plate, side plates perpendicular to both sides of the base plate, and ear plates perpendicular to the ends of the side plates and parallel to the base plate. The pulley is installed between the ear plates of the left and right brackets. The base plate and side plates of the left and right supports are fixedly installed on the square steel by multiple sets of fasteners. The fasteners include ball bolts and lock nuts. The ball bolts pass through the mounting holes on the left or right support and are threaded through the square steel, abutting against the outer wall of the square steel inside. The lock nuts are used to lock the left or right support onto the ball bolts.

2. The assembled lifting rod according to claim 1, characterized in that: Two sets of limit adjustment plates are provided on the outer wall of the square steel at the end away from the pulley support from the second to the nth sections. One set of limit adjustment plates is located at the bottom end of the square steel, and the other set of limit adjustment plates is located at 1 / 3 of the square steel near the bottom end.

3. The assembled lifting rod according to claim 2, characterized in that: Each set of limit adjustment plates consists of two symmetrically arranged limit plates. The limit plates are "C" shaped plates that match the surface of the square steel, and the gap between the two limit plates is greater than twice the diameter of the wire rope.

4. The assembled lifting rod according to claim 3, characterized in that: The limiting plate in the limiting adjustment plate at the bottom of the square steel is provided with a tie plate that bends horizontally toward the inside of the square steel for fixed connection with the wire rope.

5. The assembled lifting rod according to claim 2, characterized in that: The thickness of the limiting adjustment plate is such that the gap between it and the outer square steel is 0.1 to 0.5 mm.

6. The assembled lifting boom according to claim 1, characterized in that: The top of the first to the (n-1)th square steel sections is provided with a first clearance groove for the clearance wire rope, and the bottom of the second to the (n)th square steel sections is provided with a second clearance groove for the clearance wire rope.

7. A mobile lighting tower, characterized in that: The assembly lifting rod as described in any one of claims 1 to 6 is installed.

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