A device for preventing wire rope jumping in a crane gripping process

Abstract

The utility model relates to portal crane technical field, concretely is a kind of anti steel wire rope skip device for crane material grabbing process, including support seat, the support seat is installed on the rack of crane, pulley is installed on the support seat, and there is presser for the pulley setting cooperation, steel wire rope is arranged between the pulley and presser, the location of the steel wire rope and pulley is S1, the position of the presser is S2, further include steel wire rope and pulley surface position detection device for detecting the location S1 of the steel wire rope and pulley, presser rotating adjusting structure is used to drive presser rotation, the position S2 of presser is adjusted, presser positioning structure is used to position the position S2 of presser, the utility model can be according to the position between steel wire rope and pulley flexibly adjust the rope position of presser, to improve the skip effect of steel wire rope on crane in the process of running.

Description

Technical Field

[0001] This utility model relates to the field of gantry crane technology, specifically to a device for preventing wire rope from jumping out of the groove during the material handling process of a crane. Background Technology

[0002] During the operation of a gantry crane, the rope clamp on the wire rope pulley is generally fixed in one position. However, the luffing motion of the gantry crane causes changes in the contact angle between the wire rope and the pulley on the column, especially in the grab bucket operation. Due to the special nature of the operation, during the grabbing process, the grab bucket needs to be slammed into the hold. At this time, the wire rope is in a slack state and, under its own weight, it will sag. During the next lifting operation, due to the impact, the wire rope will rebound. Since the position of the rope clamp is fixed, the distance between the wire rope and the rope clamp is relatively large, which may cause the wire rope to jump out of the groove, resulting in a safety accident. Therefore, how to make the rope clamp adapt to the changing angle between the wire rope and the pulley to prevent the wire rope from jumping out of the groove is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0003] The purpose of this invention is to provide a device for preventing wire rope from jumping off the groove during the material handling process of a crane, so as to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a device for preventing wire rope from jumping out of the groove during the material handling process of a crane, comprising a support base, the support base being installed on the frame of the crane, a pulley being installed on the support base, and a rope presser being provided in cooperation with the pulley, a wire rope being threaded between the pulley and the rope presser, the contact position between the wire rope and the pulley being S1, and the position of the rope presser being S2; It also includes a wire rope and pulley contact surface position detection device: used to detect the contact position S1 between the wire rope and the pulley; Rope presser rotation adjustment structure: used to drive the rope presser to rotate and adjust the position S2 of the rope presser; The rope presser positioning structure is used to position the rope presser at position S2.

[0005] Preferably, the device for detecting the contact position between the wire rope and the pulley is a laser scanning detection device. The laser scanning detection device is installed and fixed on one side of the pulley through an existing bracket structure, and the contact position S1 between the wire rope and the pulley is detected by laser scanning detection.

[0006] Preferably, the wire rope and pulley contact surface position detection device includes a video detection device, which is installed and fixed on one side of the pulley through an existing bracket structure, and detects the contact position S1 of the wire rope and pulley through video detection.

[0007] Preferably, the wire rope and pulley contact surface position detection device includes a pressure sensor, a pulley shaft is fitted at the pulley, the pulley is mounted on the support base via the pulley shaft, and multiple pressure sensors are evenly installed at the pulley shaft and located between the pulley shaft and the support base.

[0008] Preferably, the rope presser rotation adjustment structure includes a servo motor, which is installed on one side of the support base. The rope presser includes a mounting frame and a rope pressing end. One end of the mounting frame connected to the support base is provided with a rotating shaft. The rotating shaft is a hollow shaft and is installed on the outside of the support base through a bearing. The servo motor and the rotating shaft of the rope presser are connected by a gear structure for transmission.

[0009] Preferably, the rope presser positioning structure includes an absolute encoder, which is mounted on the rotating shaft of the rope presser.

[0010] Compared with the prior art, the beneficial effects of this utility model are: This invention correlates the contact position between the hoisting wire rope and the pulley with the position of the rope presser, and makes the position of the rope presser change synchronously with the contact position between the hoisting wire rope and the pulley, so that the distance between the rope presser and the wire rope remains dynamically consistent. By detecting the sag of the wire rope in real time, the pressing angle of the wire rope pressing device is adjusted, so that the wire rope can always be kept in the pulley groove, thereby preventing the wire rope from jumping out of the groove. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the position and structure of the wire rope when the crane boom is at its maximum amplitude in the prior art. Figure 2 for Figure 1 Enlarged view of the local structure of A in the middle; Figure 3 This is a schematic diagram of the position and structure of the wire rope when the crane boom is at its minimum amplitude in the prior art. Figure 4 for Figure 3 Enlarged view of the local structure of B; Figures 5-6 This is a schematic diagram of the structure when a laser scanning detection device or a video detection device is used to detect the contact position between the wire rope and the pulley in this utility model; Figures 7-9 This is a schematic diagram of the structure of the present invention when a pressure sensor is used to detect the contact position between the wire rope and the pulley.

[0012] The components represented by each number in the attached diagram are listed below: 1. Support base; 2. Pulley; 201. Pulley shaft; 3. Rope presser; 301. Mounting bracket; 302. Rope pressing end; 303. Rotating shaft; 4. Wire rope; 5. Wire rope and pulley contact surface position detection device; 501. Pressure sensor; 6. Servo motor; 7. Absolute encoder. Detailed Implementation

[0013] 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 of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0014] This utility model provides a technical solution: Example 1, please refer to... Figures 1-6 : A device for preventing wire rope from jumping off the groove during the material handling process of a crane includes a support base 1, which is installed on the frame of the crane. A pulley 2 is installed on the support base 1, and a rope presser 3 is provided in cooperation with the pulley 2. A wire rope 4 is threaded between the pulley 2 and the rope presser 3. The contact position between the wire rope 4 and the pulley 2 is S1, and the position of the rope presser 3 is S2. It also includes a wire rope and pulley contact surface position detection device 5, which is used to detect the contact position S1 between the wire rope 4 and the pulley 2; The rope presser rotation adjustment structure is used to drive the rope presser 3 to rotate and adjust the position S2 of the rope presser 3; The rope presser positioning structure is used to position the rope presser 3 at position S2.

[0015] It should also be noted that the wire rope and pulley contact surface position detection device 5 is a laser scanning detection device or a video detection device, which is installed and fixed on one side of the pulley 2 through the existing bracket structure; The contact position between the wire rope 4 and the pulley 2 is detected by laser scanning or video detection, and then the position data is sent to the PLC control system for processing to obtain the position S1. Among them, the laser scanning detection device is preferably a laser scanning detector. The detection accuracy of the laser scanning is selected according to the on-site operation conditions. At the same time, existing anti-interference measures (such as dust prevention, strong light prevention, etc.) can be equipped to improve the detection accuracy. All of the above measures can be achieved by existing technology, and this utility model will not elaborate on them. The preferred video inspection device is an industrial inspection camera.

[0016] It should also be noted that the rope presser rotation adjustment structure of this utility model includes a servo motor 6, which is installed on one side of the support base 1. The rope presser 3 includes a mounting frame 301 and a rope pressing end 302. The mounting frame 301 is connected to the support base 1 at one end with a rotating shaft 303. The rotating shaft 303 is a hollow shaft and is installed on the outside of the support base 1 through a bearing. The servo motor 6 and the rotating shaft 303 of the rope presser 3 are connected by a gear structure. The rope pressing end 302 is preferably a roller type.

[0017] It should also be noted that the positioning structure of the rope presser in this utility model includes an absolute encoder 7, which is mounted on the rotating shaft 303 of the rope presser 3.

[0018] The absolute encoder 7 installed on the rotating shaft 303 of the rope presser 3 transmits the position data of the rope presser 3 to the PLC control system for data processing to locate the position of the rope presser 3 and obtain the position S2.

[0019] The positions S1 (where the wire rope 4 is in contact with the rope presser 3) and S2 (where the rope presser 3 is located) are established in the same coordinate system. If S1 changes, an action signal is sent to the servo motor 6 to drive the servo motor 6 to move, thereby driving the rope presser 3 to move. The range of motion is detected by the absolute encoder 7 installed behind the rotating shaft 303 of the rope presser 3, so that the positions of S1 and S2 are always kept within a fixed safety value.

[0020] In this invention, the servo motor 6 is mounted on the side and drives the rope presser 3 through gear transmission.

[0021] Example 2, please refer to Figures 1-4 and Figures 7-9 : A device for preventing wire rope from jumping off the groove during the material handling process of a crane includes a support base 1, which is installed on the frame of the crane. A pulley 2 is installed on the support base 1, and a rope presser 3 is provided in cooperation with the pulley 2. A wire rope 4 is threaded between the pulley 2 and the rope presser 3. The contact position between the wire rope 4 and the pulley 2 is S1, and the position of the rope presser 3 is S2. It also includes a wire rope and pulley contact surface position detection device 5, which is used to detect the contact position S1 between the wire rope 4 and the pulley 2; The rope presser rotation adjustment structure is used to drive the rope presser 3 to rotate and adjust the position S2 of the rope presser 3; The rope presser positioning structure is used to position the rope presser 3 at position S2.

[0022] It should also be noted that the wire rope and pulley contact surface position detection device 5 includes a pressure sensor 501, a pulley shaft 201 is installed at the pulley 2, the pulley 2 is installed on the support base 1 through the pulley shaft 201, and multiple pressure sensors 501 are evenly installed at the pulley shaft 201 and located between the pulley shaft 201 and the support base 1. It should also be noted that the pulley shaft 201 is installed on the support base 1 in an existing manner. The support base 1 adopts a structure of two sets of mutually cooperating side plates with shaft holes. The pulley shaft 201 passes through the corresponding shaft holes and is firmly locked on the support base 1 by a fastener. The fastener can be a shaft end baffle, bolt, locking device, etc., to prevent it from rotating or moving. The installation structure of the pulley shaft 201 on the support base 1 is existing technology, and this utility model will not elaborate on it. It should also be noted that multiple pressure sensors 501 installed on the pulley shaft 201 collect force data and transmit the data to the PLC control system for data analysis to calculate the contact position between the wire rope 4 and the pulley 2. Then, the PLC control system processes the above position data to obtain position S1.

[0023] Here, the number of pressure sensors 501 is determined according to the diameter of pulley shaft 201 to ensure that the force distribution covers the entire circumference; The sensor's range (which must match the maximum tension of the wire rope) and protection level (vibration resistance, oil resistance) should be selected based on the on-site operational requirements, choosing the appropriate existing product. It should also be noted that the rope presser rotation adjustment structure described in this utility model includes a servo motor 6, which is installed on one side of the support base 1. The rope presser 3 includes a mounting frame 301 and a rope pressing end 302. A rotating shaft 303 is provided at one end of the mounting frame 301 connected to the support base 1. The rotating shaft 303 is a hollow shaft and is installed on the outside of the support base 1 through a bearing. The servo motor 6 and the rotating shaft 303 of the rope presser 3 are connected by a gear structure. A protective cover can be provided at the gear transmission point for protection. The rope pressing end 302 is preferably a roller type.

[0024] It should also be noted that the positioning structure of the rope presser in this utility model includes an absolute encoder 7, which is installed on the rotating shaft 303 of the rope presser 3. The absolute encoder 7 and the rotating shaft 303 can be connected and fixed by existing key connection / set screw connection or other methods.

[0025] The position of the rope presser 3 is determined by the absolute encoder 7 installed on the rotating shaft 303 of the rope presser 3, and the data is processed by the PLC control system to obtain the position S2. The positions S1 (where the wire rope 4 is in contact with the rope presser 3) and S2 (where the rope presser 3 is located) are established in the same coordinate system. If S1 changes, an action signal is sent to the servo motor 6 to drive the servo motor 6 to move, thereby driving the rope presser 3 to move. The range of motion is detected by the absolute encoder 7 installed behind the rotating shaft 303 of the rope presser 3, so that the positions of S1 and S2 are always kept within a fixed safety value.

[0026] In this invention, the servo motor 6 is mounted on the side and drives the rope presser 3 through gear transmission.

[0027] 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 device for preventing wire rope from jumping out of groove during the material handling process of a crane, comprising a support base (1), the support base (1) being installed on the frame of the crane, a pulley (2) being installed on the support base (1), and a rope presser (3) being provided in cooperation with the pulley (2), a wire rope (4) being threaded between the pulley (2) and the rope presser (3), the contact position between the wire rope (4) and the pulley (2) being S1, and the position of the rope presser (3) being S2; characterized in that It also includes a wire rope and pulley contact surface position detection device (5) for detecting the contact position S1 of the wire rope (4) and the pulley (2); The rope presser rotation adjustment structure is used to drive the rope presser (3) to rotate and adjust the position S2 of the rope presser (3); The rope presser positioning structure is used to position the rope presser (3) at position S2.

2. A device for preventing wire rope slippage during a load handling process of a crane according to claim 1, characterized in that: The wire rope and pulley contact surface position detection device (5) is a laser scanning detection device. The laser scanning detection device is installed and fixed on one side of the pulley (2) through the existing bracket structure, and the contact position S1 of the wire rope (4) and the pulley (2) is detected by laser scanning detection.

3. A device for preventing wire rope slippage during a load handling process of a crane according to claim 1, characterized in that: The wire rope and pulley contact surface position detection device (5) includes a video detection device. The video detection device is installed and fixed on one side of the pulley (2) through the existing bracket structure, and the contact position S1 of the wire rope (4) and the pulley (2) is detected by video detection.

4. A device for preventing wire rope slippage during a load handling process of a crane according to claim 1, characterized in that: The wire rope and pulley contact surface position detection device (5) includes a pressure sensor (501). A pulley shaft (201) is installed at the pulley (2). The pulley (2) is installed on the support base (1) through the pulley shaft (201). Multiple pressure sensors (501) are evenly installed at the pulley shaft (201) and are located between the pulley shaft (201) and the support base (1).

5. A device for preventing wire rope slippage during a crane gripping process according to claim 1, characterized in that: The rope presser rotation adjustment structure includes a servo motor (6), which is installed on one side of the support base (1). The rope presser (3) includes a mounting frame (301) and a rope pressing end (302). The mounting frame (301) is connected to the support base (1) with a rotating shaft (303). The rotating shaft (303) is a hollow shaft and is installed on the outside of the support base (1) through a bearing. The servo motor (6) and the rotating shaft (303) of the rope presser (3) are connected by a gear structure.

6. A device for preventing wire rope derailment during crane material handling as described in claim 5, characterized in that: The positioning structure of the rope presser includes an absolute encoder (7), which is mounted on the rotating shaft (303) of the rope presser (3).

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