Crane arm lifting support

Abstract

The utility model discloses a lifting support of a crane arm, which comprises a rotary table and the crane arm, a monitoring structure is arranged at the top of the rotary table, the lifting support of the crane arm relates to the technical field of crane arms, the monitoring structure is arranged on the rotary table, and the monitoring structure synchronously rotates along with the crane arm and the rotary table. The human body sensor and the crane arm can always keep consistent with the rising and falling direction of the crane arm, which means that the human body sensor can more accurately monitor the position of a person and give an alarm or take other safety measures in time when necessary. The two-way screw can enable the two human body sensors to linearly move in the opposite direction or the back-to-back direction, the human body sensors can cover a wider area due to the design, all-directional monitoring of the lifting direction of the crane arm is achieved, no matter which direction a person approaches the crane arm from, the human body sensors can capture existence of the person in time, and the safety of the person is improved. And the safety of the crane arm in the rising and falling process is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of crane arms, in particular to a crane arm lifting and lowering support. Background Art

[0002] The crane arm is an important part of the crane, usually composed of a telescopic arm and a rotating platform. The telescopic arm is composed of a series of arm sections, which can be extended and retracted and changed in length as needed, making the crane arm flexible and adaptable to lifting tasks at different heights and distances. At the same time, the structure of the telescopic arm also makes the crane arm have a higher load-bearing capacity and stability

[0003] In hoisting operations, the lifting and lowering process of the crane arm is a critical and high-risk operation link. However, traditional crane arms often lack effective monitoring and alarm functions during the lifting and lowering process, which increases the risk of personnel being accidentally injured by the crane arm, especially in complex operating environments such as construction sites and docks, where there is frequent personnel flow and it is difficult to ensure that there is no one around at all times. In this case, if the crane arm accidentally touches the relevant personnel, it may cause serious injury accidents. Utility Model Content

[0004] The purpose of the utility model is to provide a crane arm lifting and lowering support to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a crane arm lifting and lowering support, comprising a rotating platform and a crane arm, the crane arm is arranged at the top of the rotating platform, and a monitoring structure is arranged on the top of the rotating platform, the monitoring structure comprises a support box, a bidirectional screw, a protection box, a motor, a limit rod, two movable seats, two human body sensors and an alarm, the support box is arranged at the top of the rotating platform, and an opening is opened on the front side of the support box, the bidirectional screw is rotatably connected to the left and right sides of the support box respectively, the protection box is arranged on the right side outside the support box, the motor is arranged in the protection box, and the driving end of the motor is connected to one end of the bidirectional screw, the limit rod is arranged between the left and right sides in the support box, the two movable seats are respectively movably connected to the left and right sides of the bidirectional screw and the limit rod, the two human body sensors are respectively arranged on the front sides of the two movable seats, the alarm is arranged at the top outside the support box, and the alarm is connected to the human body sensor.

[0006] Preferably, the bidirectional screw and the support box are connected via a bearing, the inner ring of the bearing and the screw are interference fit, and the outer ring of the bearing and the support box are fixedly connected.

[0007] Compared with the prior art, the beneficial effects of the utility model are as follows: the utility model sets a monitoring structure on the rotating table, and the monitoring structure rotates synchronously with the crane arm and the rotating table, and they can always keep consistent with the lifting and lowering direction of the crane arm, which means that the human body sensor can monitor the position of the personnel more accurately, and issue an alarm or take other safety measures in time when necessary, effectively avoiding the risk of relevant personnel being accidentally injured, and the monitoring structure adopts a bidirectional screw, which can enable the two human body sensors to move in a straight line towards or away from each other. This design enables the human body sensor to cover a wider area, thereby realizing all-round monitoring of the lifting and lowering direction of the crane arm. No matter from which direction the person approaches the crane arm, the human body sensor can capture his presence in time, greatly improving the safety of the crane arm during the lifting and lowering process. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 This is a schematic diagram of the axonometric structure of the utility model;

[0009] Figure 2 It is a schematic diagram of the axonometric structure of the monitoring structure of the utility model;

[0010] Figure 3 It is a schematic diagram of the top view of the monitoring structure of the utility model.

[0011] In the figure: 1. rotating table; 2. crane arm; 3. monitoring structure; 31. support box; 32. bidirectional screw; 33. protection box; 34. motor; 35. limit rod; 36. moving seat; 37. human body sensor; 38. alarm. DETAILED DESCRIPTION

[0012] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0013] See also Figure 1-3The utility model provides a crane arm lifting and lowering support, including a rotating platform 1 and a crane arm 2. The crane arm 2 is arranged on the top of the rotating platform 1. A monitoring structure 3 is arranged on the top of the rotating platform 1. The monitoring structure 3 is consistent with the direction of the crane arm 2. The monitoring structure 3 includes a support box 31, a bidirectional screw 32, a protection box 33, a motor 34, a limit rod 35, two moving seats 36, two human body sensors 37 and an alarm 38. The support box 31 is arranged on the top of the rotating platform 1, and an opening is opened on the front side of the support box 31. The bidirectional screw 32 is respectively connected to the left and right sides of the support box 31. The two sides are rotatably connected, the protection box 33 is arranged on the right side outside the support box 31, the motor 34 is arranged in the protection box 33, and the driving end of the motor 34 is connected to one end of the bidirectional screw 32, the limit rod 35 is arranged between the left and right sides of the support box 31, the limit rod 35 is located on the rear side of the bidirectional screw 32, the two movable seats 36 are respectively movably connected to the left and right sides of the bidirectional screw 32 and the limit rod 35, the two human body sensors 37 are respectively arranged on the front sides of the two movable seats 36, the alarm 38 is arranged on the top outside the support box 31, and the alarm 38 is connected to the human body sensor 37.

[0014] Specifically, the bidirectional screw 32 is connected to the support box 31 via a bearing, the inner ring of the bearing is interference fit with the screw, and the outer ring of the bearing is fixedly connected to the support box 31.

[0015] Working principle: When working, the crane arm 2 and the monitoring structure 3 rotate synchronously driven by the rotating table 1 to ensure that the lifting and lowering direction of the crane arm 2 is always consistent with the monitoring structure 3. During the lifting and lowering process of the crane arm 2, the motor 34 in the monitoring structure 3 will drive the bidirectional screw 32 to rotate. Due to the limiting effect of the limit rod 35, the two moving seats 36 will drive the two human body sensors 37 to move in a straight line towards or away from each other, so that the human body sensor 37 can cover a wider area, thereby realizing all-round monitoring of the lifting and lowering direction of the crane arm 2. When the human body sensor 37 senses that someone is passing by or nearby, it will immediately transmit the signal to the alarm 38, and the alarm 38 will sound an alarm, indicating that the relevant personnel should leave immediately.

[0016] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A crane arm lifting and lowering support, comprising a rotating platform (1) and a crane arm (2), wherein the crane arm (2) is arranged on the top of the rotating platform (1), characterized in that: A monitoring structure (3) is arranged on the top of the rotating platform (1), and the monitoring structure (3) comprises a supporting box (31), a bidirectional screw (32), a protective box (33), a motor (34), a limit rod (35), two moving seats (36), two human body sensors (37) and an alarm (38). The supporting box (31) is arranged on the top of the rotating platform (1), and an opening is provided on the front side of the supporting box (31). The bidirectional screw (32) is rotatably connected to the left and right sides of the supporting box (31) respectively. The protective box (33) is arranged outside the supporting box (31). On the right side, the motor (34) is arranged in the protection box (33), and the driving end of the motor (34) is connected to one end of the bidirectional screw (32), the limit rod (35) is arranged between the left and right sides of the support box (31), the two movable seats (36) are respectively movably connected to the left and right sides of the bidirectional screw (32) and the limit rod (35), the two human body sensors (37) are respectively arranged on the front sides of the two movable seats (36), the alarm (38) is arranged on the top outside the support box (31), and the alarm (38) is connected to the human body sensor (37).

2. A crane arm lifting and lowering support according to claim 1, characterized in that: The bidirectional screw (32) and the support box (31) are connected via a bearing, the inner ring of the bearing and the screw are interference fit, and the outer ring of the bearing and the support box (31) are fixedly connected.

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