Cargo boom end operation protection device

Abstract

The utility model provides a cargo boom end operation protection device which comprises a fixing seat, the fixing seat is fixedly connected to the end, close to a tower body, of a cargo boom, a rope winding shaft is rotationally connected to the fixing seat, the lower end of the rope winding shaft is fixedly connected with a ratchet wheel, and the ratchet wheel is fixedly connected with a ratchet wheel. The lower end of the fixing base is rotationally connected with a pawl used for being locked with the ratchet wheel in a matched mode. The rope winding shaft is connected with one end of a rope, and the other end of the rope is connected with the end, away from the tower body, of the cargo boom. According to the utility model, the problem of potential safety hazard of falling from a high place when a maintainer walks on the cargo boom and works aloft is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of engineering machinery, in particular to a crane arm end operation protection device. Background Art

[0002] The maintenance of the boom of a tower crane often occurs during engineering operations. This type of maintenance is high-altitude work and is very dangerous. An upper boom beam is welded to the upper end of the existing boom, and maintenance personnel need to hold the upper boom beam and walk on the walkway on both sides of the lower chord of the boom frame. When performing maintenance operations, maintenance personnel also need to hold the handrail to maintain safety, which restricts maintenance work and poses a risk of accidentally falling. The boom will sway in the air due to the influence of strong winds, and maintenance personnel may also have accidents because they cannot hold the handrail. Therefore, it is necessary to invent a new boom end operation protection device. Utility Model Content

[0003] The utility model aims to provide a crane arm end operation protection device to solve the potential safety hazard of falling from a height when maintenance personnel walk on the crane arm and perform aerial operations.

[0004] The technical solution adopted by the utility model to solve its technical problems is:

[0005] A crane arm end operation protection device comprises a fixing seat, wherein the fixing seat is fixedly connected to one end of the crane arm close to a tower body, a rope winding shaft is rotatably connected to the fixing seat, a ratchet is fixedly connected to the lower end of the rope winding shaft, and a pawl for cooperating and locking with the ratchet is rotatably connected to the lower end of the fixing seat; the rope winding shaft is connected to one end of a rope, and the other end of the rope is connected to one end of the crane arm away from the tower body.

[0006] Furthermore, a fixing plate is detachably fixedly connected to one side of the fixing seat, and the fixing plate and the fixing seat are fixed on the lifting arm in a limited manner.

[0007] Furthermore, the fixing seat is a U-shaped structure, the fixing plate is an I-shaped structure, the upper and lower sides of the fixing plate are detachably fixedly connected to the fixing seat by bolts, and a rectangular fixing groove for fixing on the crane arm is formed between the fixing plate and the fixing seat.

[0008] Furthermore, a limit pin is fixedly connected to the outer side wall of the rope winding shaft, and a rope ring at one end of the rope is sleeved on the limit pin and wound around the rope winding shaft.

[0009] Furthermore, a rotating rod head is fixedly connected to the upper end of the rope winding shaft, and a plurality of rotating rod holes are evenly spaced and arranged in a circular array on the side wall of the rotating rod head, and the rotating rod holes are used to insert the rotating rods.

[0010] Furthermore, the other end of the rope is detachably fixedly connected to an end of the crane arm away from the tower body through a wire rope clamp.

[0011] Furthermore, a safety rope is movably connected to the rope.

[0012] Furthermore, one end of the safety rope is movably connected to the rope through a quick connecting ring.

[0013] Furthermore, two groups of locking teeth are arranged at intervals on one side of the pawl that cooperates with the ratchet wheel, and the locking teeth are adapted to the ratchet teeth on the ratchet wheel.

[0014] Furthermore, a handle portion is protruded from one end of the pawl.

[0015] The beneficial effects of the utility model are as follows: the utility model arranges a rope winding shaft and a rope on the crane arm, and uses a ratchet pawl locking mechanism to lock the rope, which, in combination with the safety rope on the maintenance personnel, can effectively prevent the maintenance personnel from falling from a height, ensure the safety of the maintenance personnel when walking on the crane arm, and solve the potential safety hazard problem of high-altitude operations.

[0016] The present invention will be described in more detail below with reference to the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The utility model is an overall assembly diagram of a crane arm end operation protection device.

[0018] Figure 2 for Figure 1 A magnified view of the structure of part I.

[0019] Figure 3 for Figure 1 Enlarged view of the structure of part II.

[0020] Figure 4 The utility model is a front view of a crane arm end operation protection device.

[0021] Figure 5 The utility model is a bottom view of a crane arm end operation protection device. DETAILED DESCRIPTION

[0022] like Figures 1 to 5A boom end operation protection device shown in the figure includes a fixed base 1, the fixed base 1 is fixedly connected to one end of the boom 10 close to the tower body, a rope winding shaft 2 is rotatably connected to the fixed base 1, a ratchet 21 is fixedly connected to the lower end of the rope winding shaft 2, and a pawl 22 for locking with the ratchet 21 is rotatably connected to the lower end of the fixed base 1; the pawl 22 is connected to the bottom of the fixed base 1 through a rotating shaft 221, the rope winding shaft 2 is connected to one end of a rope 5, and the other end of the rope 5 is connected to the end of the boom 10 away from the tower body.

[0023] Preferably, in combination with the above scheme, in order to facilitate clamping and fixing the fixing seat 1 on the upper boom beam of the boom 10, a fixing plate 3 is detachably fixedly connected to one side of the fixing seat 1, and the fixing plate 3 and the fixing seat 1 are fixed on the boom 10 in a limited manner.

[0024] Preferably, in combination with the above scheme, in order to facilitate adaptation to the long rectangular structure of the upper boom beam, the fixing seat 1 is a U-shaped structure, the fixing plate 3 is a "X"-shaped structure, the upper and lower sides of the fixing plate 3 are detachably fixed to the fixing seat 1 by bolts, and a rectangular fixing groove 31 for fixing to the boom 10 is formed between the fixing plate 3 and the fixing seat 1.

[0025] Preferably, in combination with the above scheme, in order to facilitate limiting the position of the rope 5 before winding, a limiting pin 23 is fixedly connected to the outer wall of the rope winding shaft 2, and the rope ring at one end of the rope 5 is sleeved on the limiting pin 23 and wound around the rope winding shaft 2.

[0026] Preferably, in combination with the above scheme, in order to facilitate the insertion of the rotating rod 4 and drive the rope winding shaft 2 to rotate, the upper end of the rope winding shaft 2 is fixedly connected with a rotating rod head 24, and a plurality of groups of rotating rod holes 25 are evenly spaced in a circular array on the side wall of the rotating rod head 24, and the rotating rod holes 25 are used to insert the rotating rod 4.

[0027] Preferably, in combination with the above solution, the other end of the rope 5 is detachably fixedly connected to the end of the boom 10 away from the tower body through a wire rope clamp. The wire rope clamp is a standard part, which can cover and lock the other end of the rope 5 on the end of the boom 10 away from the tower body.

[0028] Preferably, in combination with the above solution, in order to facilitate connection with the safety belt of the maintenance personnel, a safety rope 20 is movably connected to the rope 5.

[0029] Preferably, in combination with the above solution, one end of the safety rope 20 is movably connected to the rope 5 through a quick connection ring 201. The quick connection ring 201 is a standard part, which is convenient to connect and use by threaded connection. In addition to using the quick connection ring 201, the safety rope 20 can also be buckled on the rope 5 using standard parts such as a safety belt hook and a safety buckle.

[0030] Furthermore, in order to better achieve locking and prevent loosening, two sets of locking teeth 222 are arranged at intervals on one side of the pawl 22 that cooperates with the ratchet 21, and the locking teeth 222 are adapted to the ratchet teeth on the ratchet 21. The locking structure of the double-toothed pawl and the ratchet is an escapement mechanism.

[0031] Furthermore, in order to facilitate pushing and unlocking the pawl 22 by hand, a handle portion 223 is provided on one end of the pawl 22 .

[0032] When using the utility model, first fix one end of the rope 5 to the end of the crane arm 10 away from the tower body through the wire rope clamp, then set the rope ring of the other end of the rope 5 on the limit pin 23 of the rope winding shaft 2, and then insert the rotating rod 4 into the rotating rod hole 25 of the rotating rod head 24, and rotate the rotating rod 4 to drive the rope winding shaft 2 to rotate, so that the rope 5 is wound around the rope winding shaft 2 for tightening. When it is tightened to a certain extent, the handle part 223 is manually operated to rotate the pawl 22 toward the ratchet 21, so that the locking tooth 222 cooperates with the ratchet on the matching ratchet 21 to lock; when the rotating rod 4 is released, the pawl 22 is stuck to the ratchet 21 to prevent rotation, and the rope 5 is still in a tightened state and will not loosen;

[0033] When the rope 5 needs to be removed, the rotating rod 4 is manually rotated to tighten the rope appropriately so that a certain unlocking gap appears between the pawl 22 and the ratchet 21. The handle 223 can be operated to disengage the pawl 22 from the ratchet 21 to achieve unlocking. Finally, the rope loop of the rope 5 can be removed from the limit pin 23.

[0034] In the description of the present invention, it should be understood that terms such as "upper", "lower", "front", "back", "left", "right", "bottom", "inside", "outside", "one end", "one side", "two ends", "both sides", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0035] The utility model is described above by way of example in conjunction with the accompanying drawings. Obviously, the specific implementation of the utility model is not limited to the above-mentioned method. As long as various improvements are made using the method concept and technical solution of the utility model, or they are directly applied to other occasions, they all fall within the protection scope of the utility model.

Claims

1. A crane arm end operation protection device, characterized in that: The invention comprises a fixing seat (1), wherein the fixing seat (1) is fixedly connected to one end of a lifting arm (10) close to a tower body, a rope winding shaft (2) is rotatably connected to the fixing seat (1), a ratchet (21) is fixedly connected to the lower end of the rope winding shaft (2), and a ratchet pawl (22) for locking with the ratchet (21) is rotatably connected to the lower end of the fixing seat (1); the rope winding shaft (2) is connected to one end of a rope (5), and the other end of the rope (5) is connected to one end of the lifting arm (10) away from the tower body.

2. The boom end operation protection device according to claim 1 is characterized in that: A fixing plate (3) is detachably fixedly connected to one side of the fixing seat (1), and the fixing plate (3) and the fixing seat (1) are fixed on the lifting arm (10) in a limited manner.

3. The boom end operation protection device according to claim 2 is characterized in that: The fixing seat (1) is a U-shaped structure, and the fixing plate (3) is a cross-shaped structure. The upper and lower sides of the fixing plate (3) are detachably fixedly connected to the fixing seat (1) by bolts, and a rectangular fixing groove (31) for fixing to the lifting arm (10) is formed between the fixing plate (3) and the fixing seat (1).

4. The boom end operation protection device according to claim 1 is characterized in that: A limit pin (23) is fixedly connected to the outer side wall of the rope winding shaft (2), and a rope ring at one end of the rope (5) is sleeved on the limit pin (23) and wound around the rope winding shaft (2).

5. The boom end operation protection device according to claim 1 is characterized in that: The upper end of the rope winding shaft (2) is fixedly connected to a rotating rod head (24), and a plurality of groups of rotating rod holes (25) are evenly spaced in a circular array on the side wall of the rotating rod head (24), and the rotating rod holes (25) are used to insert the rotating rod (4).

6. The boom end operation protection device according to claim 1 is characterized in that: The other end of the rope (5) is detachably fixedly connected to an end of the crane arm (10) away from the tower body via a wire rope clamp.

7. The boom end operation protection device according to claim 1 is characterized in that: The rope (5) is movably connected with a safety rope (20).

8. The boom end operation protection device according to claim 7 is characterized in that: One end of the safety rope (20) is movably connected to the rope (5) via a quick connection ring (201).

9. The boom end operation protection device according to claim 1 is characterized in that: Two groups of locking teeth (222) are arranged at intervals on one side of the pawl (22) that cooperates with the ratchet (21), and the locking teeth (222) are adapted to the ratchet teeth on the ratchet (21).

10. The boom end operation protection device according to claim 9, characterized in that: One end of the ratchet pawl (22) is protruded and provided with a handle portion (223).

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