Height protection device for lifting hook of luffing jib crane

Abstract

The utility model relates to the technical field of protection devices, and discloses a movable arm variable amplitude type crane hook height protection device which comprises a crane body, a fixed bin is fixedly installed on one side of the crane body, a laser range finder is arranged on one side of the crane body, and a range finding plate is arranged on one side of a hook of the crane body. A PLC is fixedly mounted on one side of the crane body, the crane body, a fixed bin, a limiting plate, a volute spiral spring, a winding drum, a connecting rope and a rotating frame are used in cooperation, the effect of preventing a laser range finder from shaking greatly can be achieved, and when a lifting hook shakes to drive a distance measuring plate to move, the distance measuring plate is driven to move by the lifting hook. The shaking of the laser range finder is weakened through the straightened connecting rope, and the laser emitted by the laser range finder is always accurately projected to the top surface of the range finding plate, so that the range finding effect of the laser range finder is ensured, the high protection effect is ensured, and the device is relatively practical.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of protection device, especially relates to a height protection device of hook of luffing type crane of movable arm. BACKGROUND

[0002] The hook height changes with the change of amplitude in the process of luffing of movable arm luffing type crane such as movable arm tower crane, mast crane, floating crane and port portal crane, and the height of the hook needs to be monitored in real time to protect the height of the hook in the opposite direction to prevent height overrun.

[0003] The existing hook height protection device of luffing type crane of movable arm (announcement number: CN217377009U) has at least the following disadvantages:

[0004] In the above patent, the laser sensor and the detection induction plate are used for distance measurement to protect the height of the crane hook, but the hook will shake during use, and the detection induction plate will move forward and backward driven by the hook, so that the laser of the laser sensor cannot reach the detection induction plate, affecting the height protection and having certain limitations. UTILITY MODEL CONTENTS

[0005] The utility model aims at solving the shortcomings in the prior art and provides a hook height protection device of luffing type crane of movable arm.

[0006] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0007] A hook height protection device of luffing type crane of movable arm, comprising a crane body, a fixed bin is fixedly installed on one side of the crane body, a laser range finder is arranged on one side of the crane body, a distance measuring plate is arranged on one side of the hook of the crane body, a PLC controller is fixedly installed on one side of the crane body, the laser range finder is electrically connected with the PLC controller, and the hook height protection device further comprises an anti-shaking assembly for preventing the laser range finder from shaking greatly, the anti-shaking assembly is arranged on the inner side of the fixed bin, and the anti-shaking assembly comprises two limiting plates, both the two limiting plates are fixedly installed on the inner side of the fixed bin.

[0008] As a further scheme of the utility model, the anti-shaking assembly further includes a winding drum movably sleeved in the fixed bin, a volute spring is movably sleeved in the winding drum, the volute spring is fixedly installed with the inner circular wall surface of the winding drum, the volute spring is fixedly sleeved with the limiting plate, the outer circular wall surface of the winding drum is fixedly installed and wound with a connecting rope, the outer circular wall surface of the fixed bin is provided with a second fixed hole, the second fixed hole is movably sleeved with the connecting rope, one side of the crane body is provided with a first connecting plate, one side of the first connecting plate is provided with a first circular through hole, the inner circular wall surface of the first circular through hole is movably sleeved with a limiting column, the limiting column is fixedly installed with one side of the crane body, the outer portion of the first connecting plate is movably sleeved with a rotating frame, the both sides of the rotating frame are respectively provided with a first fixed hole, the inner circular wall surface of the first fixed hole is movably sleeved with a connecting column, the connecting column is fixedly installed with the first connecting plate, the top surface of the rotating frame is provided with a limiting hole, the rotating frame is fixedly installed with the laser range finder, one side of the hook of the crane body is fixedly installed with a second connecting plate, the connecting rope passes through the inner circular wall surface of the limiting hole and is fixedly installed with the top surface of the second connecting plate downwards.

[0009] As a further scheme of the utility model, the hook of the crane body is fixedly installed with a plurality of fixed plates, the top surface of the ranging plate and the top surface of the fixed plate are respectively provided with a first threaded hole, and the inner circular wall surface of the first threaded hole is screwed with a bolt.

[0010] As a further scheme of the utility model, the outer portion of the laser range finder is movably sleeved with a protective shell.

[0011] As a further scheme of the utility model, the top surface of the protective shell and the top surface of the rotating frame are respectively provided with a second threaded hole, and the inner circular wall surface of the second threaded hole is screwed with a threaded column.

[0012] As a further scheme of the utility model, the fixed bin is made of stainless steel.

[0013] Compared with the prior art, the utility model has the advantages of:

[0014] The crane body, the fixed bin, the limiting plate, the volute spring, the winding drum, the connecting rope and the rotating frame are cooperatively used, the swinging of the laser range finder is prevented, the swinging of the laser range finder is weakened by the straight connecting rope when the hook swings and drives the ranging plate to move, the laser emitted by the laser range finder is always accurately projected to the top surface of the ranging plate, the ranging effect of the laser range finder is ensured, the height protection effect is ensured, and the utility model is practical. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 The overall structure schematic diagram of a dynamic arm amplitude type crane hook height protection device is provided in the utility model.

[0016] Figure 2 The crane body structure schematic diagram of a dynamic arm amplitude type crane hook height protection device is provided in the utility model.

[0017] Figure 3 For Figure 2 The local structure schematic diagram of A is provided in the utility model.

[0018] Figure 4 For Figure 2 The local structure schematic diagram of B is provided in the utility model.

[0019] Figure 5 The limiting hole structure schematic diagram of a dynamic arm amplitude type crane hook height protection device is provided in the utility model.

[0020] In the figure: 1, crane body; 2, fixed bin; 3, limiting plate; 4, volute spring; 5, winding drum; 6, connecting rope; 7, rotating frame; 8, first fixed hole; 9, first connecting plate; 10, connecting column; 11, limiting column; 12, laser range finder; 13, second fixed hole; 14, limiting hole; 15, range finding plate; 16, second connecting plate; 17, fixed plate; 18, first threaded hole; 19, bolt; 20, protective shell; 21, second threaded hole; 22, threaded column. Specific implementation

[0021] In order to make the technical means, creative features, purposes and effects achieved by the utility model easy to understand, the utility model is further described below in combination with specific implementation manners.

[0022] In the description of the utility model, it should be pointed out that the directions or position relations indicated by the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like are the directions or position relations shown based on the drawings, and are only for the convenience of describing the utility model and simplifying the description, and are not indicative or suggestive of the devices or elements indicated must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicative or suggestive of relative importance.

[0023] In the description of the utility model, it is necessary to explain, unless another explicit provision and limitation, term '' install '', '' set up '', '' connection '' etc. should do broad sense understanding, for example '' connection '', can be fixed connection, also can be detachable connection, or integrally connected, can be mechanical connection, also can be electric connection, can be direct connection, also can be indirectly connected through intermediate medium, can be two element internal intercommunication. For ordinary skilled person in the art, the above-mentioned term can be understood in the specific meaning in the utility model according to specific circumstances.

[0024] Referring to Figures 1-5 A jib crane hook height protection device, including crane body 1, the one side of crane body 1 is fixedly installed with fixed bin 2, the one side of crane body 1 is provided with laser range finder 12, the one side of the hook of crane body 1 is provided with range board 15, the one side of crane body 1 is fixedly installed with PLC controller, laser range finder 12 is electrically connected with PLC controller, further including the anti-shaking assembly for preventing laser range finder 12 from shaking greatly, the anti-shaking assembly is arranged at the inside one side of fixed bin 2, the anti-shaking assembly includes: two limit plates 3, two limit plates 3 are all fixedly installed at the inside one side of fixed bin 2, the anti-shaking assembly further includes the winding drum 5 of movable sleeve in the inside of fixed bin 2, the inside movable sleeve of winding drum 5 has scroll spring 4, scroll spring 4 is fixedly installed with the inner circular wall surface of winding drum 5, scroll spring 4 is fixedly sleeved with limit plate 3, the outer circular wall surface of winding drum 5 is fixedly installed and is wound with connecting rope 6, the outer circular wall surface of fixed bin 2 is provided with second fixed hole 13, second fixed hole 13 is movably sleeved with connecting rope 6, the one side of crane body 1 is provided with first connecting plate 9, the one side of first connecting plate 9 is provided with first circular through-hole, the inner circular wall surface of first circular through-hole is movably sleeved with limit post 11, limit post 11 is fixedly installed with the one side of crane body 1, the outside movable sleeve of first connecting plate 9 has rotating stand 7, the both sides of rotating stand 7 are provided with first fixed hole 8, the inner circular wall surface of first fixed hole 8 is movably sleeved with connecting column 10, connecting column 10 is fixedly installed with first connecting plate 9, the top surface of rotating stand 7 is provided with limit hole 14, rotating stand 7 is fixedly installed with laser range finder 12, the one side of the hook of crane body 1 is fixedly installed with second connecting plate 16, connecting rope 6 passes through the inner circular wall surface of limit hole 14 and is fixedly installed with the top surface of second connecting plate 16 downwards.

[0025] In the embodiment, the side of the hook of the crane body 1 is fixedly provided with a plurality of fixed plates 17, the top surface of the distance measuring plate 15 and the top surface of the fixed plate 17 are respectively provided with first threaded holes 18, the inner circumferential surface of the first threaded hole 18 is threadedly connected with a bolt 19, the outer surface of the laser range finder 12 is movably sleeved with a protective shell 20, the top surface of the protective shell 20 and the top surface of the rotating frame 7 are respectively provided with second threaded holes 21, the inner circumferential surface of the second threaded hole 21 is threadedly connected with a threaded column 22, and the fixed bin 2 is made of stainless steel.

[0026] From the above description, it can be seen that the above-mentioned embodiments of the utility model realize the following technical effects: through the setting of the crane body 1, when the user moves the hook up and down, the laser range finder 12 is set to emit laser light downward to the top surface of the distance measuring plate 15, thereby measuring the distance of the hook of the crane body 1, facilitating height protection (the principle is the same as that of the reference file, which is prior art and will not be described again), and at the same time, when the hook is moved up and down, since the connecting rope 6 is wound outside the winding drum 5, the connecting rope 6 is unwound from the outside of the winding drum 5 when the hook moves, and the winding drum 5 is reversely rotated to tighten the connecting rope 6 through the setting of the volute spring 4, so that the connecting rope 6 is straightened to limit the limiting hole 14 and the rotating frame 7, and the laser range finder 12 can be rotated forward and backward through the limiting column 11 and rotated left and right through the connecting column 10, so that the laser range finder 12 can be rotated forward, backward, left and right, and then the laser range finder 12 can be deflected by the connecting rope 6, when the hook shakes, the hook pulls the connecting rope 6 to make the laser range finder 12 rotate to always face the distance measuring plate 15, and then the laser emitted by the laser range finder 12 can always reach the top surface of the distance measuring plate 15, thereby comprehensively achieving the effect of preventing the laser range finder 12 from shaking greatly, and when the hook shakes to move the distance measuring plate 15, the straightened connecting rope 6 weakens the shaking of the laser range finder 12, and the laser emitted by the laser range finder 12 is always accurately projected onto the top surface of the distance measuring plate 15, thereby ensuring the distance measuring effect of the laser range finder 12 and the height protection effect, which is practical.

[0027] The basic principle and main features of the utility model and the advantages of the utility model are shown and described above. Those skilled in the art should understand that the utility model is not limited by the above-mentioned embodiments, and the above-mentioned embodiments and descriptions in the specification are only to illustrate the principle of the utility model, and various changes and improvements can be made to the utility model without departing from the spirit and scope of the utility model, and these changes and improvements all fall within the scope of the utility model claimed. The scope of protection of the utility model is defined by the appended claims and their equivalents.

Claims

1. A hook height protection device for a boom-luffing crane, comprising a crane body (1), a fixed compartment (2) fixedly mounted on one side of the crane body (1), a laser rangefinder (12) disposed on one side of the crane body (1), a rangefinder plate (15) disposed on one side of the hook of the crane body (1), a PLC controller fixedly mounted on one side of the crane body (1), the laser rangefinder (12) being electrically connected to the PLC controller, and characterized in that: It also includes an anti-sway component for preventing the laser rangefinder (12) from significantly shaking, the anti-sway component being arranged on one side of the interior of the fixed bin (2), and the anti-sway component comprising: two limit plates (3), both of which are fixedly mounted on one side of the interior of the fixed bin (2).

2. The hook height protection device of a boom-luffing crane according to claim 1, characterized in that: The anti-sway component also includes a winding drum (5) movably sleeved inside the fixed bin (2), a spiral spring (4) movably sleeved inside the winding drum (5), the spiral spring (4) and the inner circular wall of the winding drum (5) are fixedly installed, the spiral spring (4) and the limit plate (3) are fixedly sleeved, the outer circular wall of the winding drum (5) is fixedly installed and wound with a connecting rope (6), the outer circular wall of the fixed bin (2) is provided with a second fixing hole (13), the second fixing hole (13) and the connecting rope (6) are movably sleeved, a first connecting plate (9) is provided on one side of the crane body (1), a first circular through hole is provided on one side of the first connecting plate (9), the inner circular wall of the first circular through hole is movably sleeved with the limiting column (1 1), the limiting column (11) is fixedly installed on one side of the crane body (1), the outer part of the first connecting plate (9) is movably sleeved with a rotating frame (7), and first fixing holes (8) are respectively opened on both sides of the rotating frame (7), and the inner circular wall surface of the first fixing hole (8) is movably sleeved with a connecting column (10), and the connecting column (10) is fixedly installed on the first connecting plate (9), and a limiting hole (14) is opened on the top surface of the rotating frame (7), and the rotating frame (7) is fixedly installed with the laser rangefinder (12), and a second connecting plate (16) is fixedly installed on one side of the hook of the crane body (1), and the connecting rope (6) passes through the inner circular wall surface of the limiting hole (14) and is fixedly installed downward on the top surface of the second connecting plate (16).

3. The hook height protection device of a boom-luffing crane according to claim 2, characterized in that: A plurality of fixing plates (17) are fixedly installed on one side of the hook of the crane body (1), and a first threaded hole (18) is respectively opened on the top surface of the distance measuring plate (15) and the top surface of the fixing plate (17), and a bolt (19) is threadedly connected to the inner circular wall surface of the first threaded hole (18).

4. The hook height protection device for a boom-luffing crane according to claim 3 is characterized in that: The outer portion of the laser rangefinder (12) is movably sleeved with a protective shell (20).

5. The hook height protection device for a boom-luffing crane according to claim 4, characterized in that: A second threaded hole (21) is respectively provided on the top surface of the protective shell (20) and the top surface of the rotating frame (7), and a threaded column (22) is threadedly connected to the inner circular wall surface of the second threaded hole (21).

6. The hook height protection device for a boom-luffing crane according to claim 1, characterized in that: The fixed bin (2) is made of stainless steel.

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