Rotation detection alarm mechanism of mechanical operation type crane

Abstract

The utility model relates to the technical field of rotation detection of cranes, in particular to a rotation detection alarm mechanism of a mechanical operation type crane, which comprises a rotation component, and the rotation component comprises a first driven gear disc, a second driven gear disc and a third driven gear disc which are respectively meshed with a transmission gear disc. Potentiometers are arranged in the first driven gear disc, the second driven gear disc and the third driven gear disc, rotating shafts on the potentiometers are perpendicularly fixed to the center of the first driven gear disc, the center of the second driven gear disc and the center of the third driven gear disc respectively, and the tooth number of the first driven gear disc is the same as that of the transmission gear disc; the number of teeth of the second driven gear disc is the same as that of the transmission gear disc, the number of teeth of the third driven gear disc is the same as that of the transmission gear disc, the annular induction piece corresponds to the detection element, and an alarm module is arranged in the detection element and is in communication connection with a terminal of the operation table. And the detection precision is improved through potentiometer detection and induction sheet induction detection.

Description

Technical Field

[0001] This utility model relates to the field of crane rotation detection technology, and in particular to a rotation detection alarm mechanism for a mechanically operated crane. Background Technology

[0002] Cranes typically involve hoisting, slewing, and luffing operations. The slewing motion of the tower jib is achieved by a motor driving a drive gear, which in turn rotates a slewing disc. The slewing angle of the tower jib is an extremely important parameter in tower crane operation, therefore, it requires real-time and precise measurement.

[0003] A rotation detection and alarm mechanism for a mechanically operated crane, authorized in China with announcement number CN 211569933 U, has a certain overlap area between the proximity switch and the detection rod. This overlap area corresponds to the dead zone of the operating mechanism and the rotation control valve, enabling accurate rotation alarm. When the operating rod is operated, the proximity switch detects the detection rod and determines whether there is an output signal, thereby triggering a rotation alarm.

[0004] However, this patent has some shortcomings in its application. Common tower crane jib slewing angle measurement typically involves meshing a gear on a rotating gear disc and vertically connecting a connecting rod to the center of the gear disc, with the end of the connecting rod directly connected to an encoder. However, in actual use, encoders for tower cranes are prone to overload errors and have low detection accuracy. Furthermore, encoder equipment is expensive. Utility Model Content

[0005] The purpose of this utility model is to provide a rotation detection and alarm mechanism for a mechanically operated crane to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A slewing detection and alarm mechanism for a mechanically operated crane includes a base assembly. The base assembly includes a gear groove with an annular groove inside. A ball bearing is rotatably connected inside the annular groove. A motor is fixedly installed at the bottom of the gear groove. A first gear rod is fixedly connected to the output end of the motor. A transmission gear disc is fixedly connected to the top of the first gear rod. The first gear rod and the gear groove are rotatably connected. A slewing assembly is provided at the top of the gear groove. The slewing assembly includes a first driven gear disc, a second driven gear disc, and a third driven gear disc, which are respectively meshed with the transmission gear disc.

[0008] As a preferred embodiment of this utility model, the first driven gear disk, the second driven gear disk, and the third driven gear disk are respectively fixedly connected to the fourth gear rod, the second gear rod, and the third gear rod, and the first driven gear disk, the second driven gear disk, and the third driven gear disk are all meshed with the gear groove.

[0009] As a preferred embodiment of this utility model, potentiometers are provided inside the first driven gear disk, the second driven gear disk, and the third driven gear disk, respectively. The rotating shafts on the potentiometers are respectively fixed perpendicularly to the centers of the first driven gear disk, the second driven gear disk, and the third driven gear disk.

[0010] As a preferred embodiment of this utility model, the first driven gear disk, the second driven gear disk and the third driven gear disk are connected to a limiting plate by a positioning block, and the top of the limiting plate is provided with three rotating grooves.

[0011] As a preferred embodiment of this utility model, the side of the limiting plate is provided with three detection strips, and the bottom of each of the three detection strips is fixedly connected with a detection element. The limiting plate is rotatably connected to the first driven gear disk, the second driven gear disk and the third driven gear disk respectively.

[0012] As a preferred embodiment of this utility model, an annular sensing plate is fixedly connected to the top of the gear groove, and the annular sensing plate corresponds to the detection element.

[0013] As a preferred embodiment of this utility model, the first driven gear disk and the transmission gear disk have the same number of teeth, the second driven gear disk and the transmission gear disk have the same number of teeth, and the third driven gear disk and the transmission gear disk have the same number of teeth.

[0014] As a preferred embodiment of this utility model, the detection element is equipped with an alarm module, and the alarm module inside the detection element is communicatively connected to the terminal of the operating console.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] 1. In this utility model, by setting a first driven gear disk, a second driven gear disk, and a third driven gear disk to be connected to the transmission gear disk, the error that occurs during rotation transmission is reduced. The first driven gear disk, the second driven gear disk, and the third driven gear disk have the same number of teeth as the transmission gear disk, so that the rotation angle of the transmission gear disk on the crane can be transmitted to the first driven gear disk, the second driven gear disk, and the third driven gear disk in a one-to-one ratio, thereby reducing the error that occurs during rotation. By setting potentiometers inside the first driven gear disk, the second driven gear disk, and the third driven gear disk, the potentiometers can better detect the rotation angle of the tower arm driven by the rotating gear disk. The rotation angle is detected by detecting the voltage of the potentiometers, which improves the detection accuracy.

[0017] 2. In this utility model, a second detection of rotation monitoring is achieved by setting an annular sensing sheet and detection elements. The annular sensing sheet and detection elements correspond to each other. When the overlapping areas of the annular sensing sheet and the three detection elements can all be sensed, no signal is sent to the terminal. When the annular sensing sheet and the three detection elements cannot be sensed or there is a lack of overlapping area, the alarm module in the detection element sends an alarm signal to the operating terminal to remind the user. By working together with two different detection methods, the detection accuracy is improved. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall design of this utility model;

[0019] Figure 2 This is a schematic diagram of the internal structure of this utility model;

[0020] Figure 3 This is a schematic diagram of the rotating operation of this utility model;

[0021] Figure 4 This is a schematic diagram of the testing process of this utility model.

[0022] In the diagram: 1. Base assembly; 2. Rotary assembly; 3. Annular sensor plate; 4. Detection element; 101. Gear groove; 102. Annular groove; 103. Rotating ball; 104. Transmission gear disk; 105. Motor; 106. First gear rod; 201. Second gear rod; 202. Third gear rod; 203. Fourth gear rod; 204. Limiting plate; 205. Detection strip; 206. Rotation groove; 207. First driven gear disk; 208. Second driven gear disk; 209. Third driven gear disk. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0024] For examples, please refer to Figure 1-4 This utility model provides a technical solution:

[0025] A slewing detection and alarm mechanism for a mechanically operated crane includes a base assembly 1. The base assembly 1 includes a gear groove 101, an annular groove 102 inside the gear groove 101, a ball bearing 103 rotatably connected inside the annular groove 102, a motor 105 fixedly mounted at the bottom of the gear groove 101, a first gear rod 106 fixedly connected to the output end of the motor 105, a transmission gear disk 104 fixedly connected to the top of the first gear rod 106, and the first gear rod 106 and the gear groove 101 rotatably connected. A slewing assembly 2 is provided at the top of the gear groove 101. The slewing assembly 2 includes a first driven gear disk 207, a second driven gear disk 208, and a third driven gear disk 204, which are respectively meshed with the transmission gear disk 104. The driven gear disk 209, the first driven gear disk 207, the second driven gear disk 208, and the third driven gear disk 209 are respectively fixedly connected to the fourth gear rod 203, the second gear rod 201, and the third gear rod 202. The first driven gear disk 207, the second driven gear disk 208, and the third driven gear disk 209 are all meshed with the gear groove 101. The exterior of the first driven gear disk 207, the second driven gear disk 208, and the third driven gear disk 209 are clamped to the limiting plate 204 by positioning blocks. The top of the limiting plate 204 has three rotating grooves 206. The limiting plate 204 is rotatably connected to the first driven gear disk 207, the second driven gear disk 208, and the third driven gear disk 209 respectively.

[0026] In this embodiment, as Figure 1 , Figure 2 and Figure 3 As shown, potentiometers are installed inside the first driven gear disk 207, the second driven gear disk 208, and the third driven gear disk 209. The rotating shafts on the potentiometers are fixed perpendicularly to the centers of the first driven gear disk 207, the second driven gear disk 208, and the third driven gear disk 209, respectively. The first driven gear disk 207 has the same number of teeth as the transmission gear disk 104, the second driven gear disk 208 has the same number of teeth as the transmission gear disk 104, and the third driven gear disk 209 has the same number of teeth as the transmission gear disk 104.

[0027] By setting the first driven gear disk 207, the second driven gear disk 208, and the third driven gear disk 209 to be connected to the transmission gear disk 104, the error in rotation transmission is reduced. The first driven gear disk 207, the second driven gear disk 208, and the third driven gear disk 209 have the same number of teeth as the transmission gear disk 104, so that the rotation angle of the transmission gear disk 104 on the crane can be transmitted to the first driven gear disk 207, the second driven gear disk 208, and the third driven gear disk 209 in a one-to-one ratio, thereby reducing the error in the slewing process. By setting potentiometers inside the first driven gear disk 207, the second driven gear disk 208, and the third driven gear disk 209, the potentiometers can better detect the slewing angle of the tower arm driven by the slewing gear disk. The detection accuracy is improved by detecting the voltage through the potentiometers.

[0028] In this embodiment, as Figure 1 , Figure 3 and Figure 4 As shown, the side of the limiting plate 204 is provided with three detection strips 205. The bottom of each of the three detection strips 205 is fixedly connected to a detection element 4. The top of the gear groove 101 is fixedly connected to an annular sensing plate 3. The annular sensing plate 3 corresponds to the detection element 4. An alarm module is provided inside the detection element 4. The alarm module inside the detection element 4 is connected to the terminal of the operating console for communication.

[0029] In this system, a second detection of the rotation monitoring is achieved by setting up a ring-shaped sensing plate 3 and a detection element 4. The ring-shaped sensing plate 3 and the detection element 4 correspond to each other. When the overlapping areas of the ring-shaped sensing plate 3 and the three detection elements 4 can all be sensed, no signal is sent to the terminal. When the ring-shaped sensing plate 3 and the three detection elements 4 cannot be sensed or there is a lack of overlapping area, the alarm module in the detection element 4 sends an alarm signal to the operating terminal to remind the user. By working together with two different detection methods, the detection accuracy is improved.

[0030] The working process of this utility model is as follows: When the rotation detection and alarm mechanism of a mechanically operated crane designed using this scheme is in operation, the first driven gear disk 207, the second driven gear disk 208, and the third driven gear disk 209 have the same number of teeth as the transmission gear disk 104. This ensures that the rotation angle of the transmission gear disk 104 on the crane is transmitted one-to-one to the first driven gear disk 207, the second driven gear disk 208, and the third driven gear disk 209, thereby reducing errors that occur during rotation. This is achieved by using the first driven gear disk 207, the second driven gear disk 208, and the third driven gear disk 209... The internal potentiometer of component 9 allows for accurate detection of the rotation angle of the tower arm driven by the rotating gear. The rotation angle is detected by measuring the voltage through the potentiometer, improving detection accuracy. During rotation, the annular sensing plate 3 and the detection element 4 correspond. When the overlapping areas of the annular sensing plate 3 and the three detection elements 4 can all be sensed, normal rotation occurs. Detection element 4 does not send signals to the terminal. When the annular sensing plate 3 and the three detection elements 4 cannot be sensed or there is a lack of overlapping area, a rotation abnormality occurs, and the alarm module inside the detection element 4 sends an alarm signal to the operating terminal to remind the user.

[0031] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A slewing detection alarm mechanism for a mechanically operated crane comprising a base assembly (1), characterised in that: The base assembly (1) includes a gear groove (101), an annular groove (102) is provided inside the gear groove (101), a ball bearing (103) is rotatably connected inside the annular groove (102), a motor (105) is fixedly installed at the bottom of the gear groove (101), a first gear rod (106) is fixedly connected to the output end of the motor (105), a transmission gear disk (104) is fixedly connected to the top of the first gear rod (106), the first gear rod (106) and the gear groove (101) are rotatably connected, and a rotary assembly (2) is provided at the top of the gear groove (101). The rotary assembly (2) includes a first driven gear disk (207), a second driven gear disk (208) and a third driven gear disk (209) that are respectively meshed with the transmission gear disk (104).

2. A slewing detection alarm mechanism for a mechanically operated crane according to claim 1, characterized in that The first driven gear disk (207), the second driven gear disk (208), and the third driven gear disk (209) are respectively fixedly connected to the fourth gear rod (203), the second gear rod (201), and the third gear rod (202), and the first driven gear disk (207), the second driven gear disk (208), and the third driven gear disk (209) are all meshed with the gear groove (101).

3. A slewing detection alarm mechanism for a mechanically operated crane according to claim 1, characterized in that: Potentiometers are provided inside the first driven gear disk (207), the second driven gear disk (208), and the third driven gear disk (209), respectively. The rotating shafts on the potentiometers are respectively fixed perpendicularly to the centers of the first driven gear disk (207), the second driven gear disk (208), and the third driven gear disk (209).

4. A slewing detection alarm mechanism for a mechanically operated crane according to claim 1, characterized in that: The first driven gear disk (207), the second driven gear disk (208) and the third driven gear disk (209) are connected to a limiting plate (204) by a positioning block. The top of the limiting plate (204) is provided with three rotating grooves (206).

5. A slewing detection alarm mechanism for a mechanically operated crane according to claim 4, characterized in that: The side of the limiting plate (204) is provided with three detection strips (205), and the bottom of each of the three detection strips (205) is fixedly connected with a detection element (4). The limiting plate (204) is rotatably connected to the first driven gear disk (207), the second driven gear disk (208) and the third driven gear disk (209) respectively.

6. A slewing detection alarm mechanism for a mechanically operated crane according to claim 1, characterized in that: An annular sensing plate (3) is fixedly connected to the top of the gear groove (101), and the annular sensing plate (3) corresponds to the detection element (4).

7. A slewing detection alarm mechanism for a mechanically operated crane according to claim 1, characterized in that: The first driven gear disk (207) and the transmission gear disk (104) have the same number of teeth, the second driven gear disk (208) and the transmission gear disk (104) have the same number of teeth, and the third driven gear disk (209) and the transmission gear disk (104) have the same number of teeth.

8. A slewing detection alarm mechanism for a mechanically operated crane according to claim 5, characterized in that: The detection element (4) is equipped with an alarm module inside, and the alarm module inside the detection element (4) is connected to the terminal of the operating console.

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