Accurate metering structure for overload device

Abstract

The invention provides a precise metering structure for an overload device, and relates to the technical field of hoisting overload, the precise metering structure comprises a support, a hinged shaft is mounted on the support, a cradle is rotatably mounted on the hinged shaft, the cradle is located below the support, a rotating shaft is mounted on the cradle, and a load power take-off pulley is rotatably connected to the rotating shaft; a cylindrical pressing type sensor is installed on the support through a threaded hole, and the sensing end of the cylindrical pressing type sensor is connected with the hinged shaft. The metering structure has the advantages that the load power take-off pulley is installed on the lower portion, the wrap angle of the steel wire rope can be changed, reverse bending of the steel wire rope is reduced, the service life of the steel wire rope is prolonged, the load power take-off pulley can rotate and move in the axial direction through the sliding bearing, and the load power take-off effect is improved. By installing the cylindrical pressing type sensor, the metering accuracy of the overload device can be improved, the using effect of the overload device is improved, and the overall using effect is good.

Description

Technical Field

[0001] The invention relates to the technical field of hoisting overload, and in particular to a precise metering structure for an overload device. Background Art

[0002] A gantry crane is a boom crane, which is supported on ground tracks or foundations by legs on both sides and installed on a gantry base that travels along the ground track. It can realize full rotation function. This type of crane is mainly used for mechanized loading and unloading of goods in ports and docks, as well as construction and installation of ships in shipyards (hereinafter referred to as gantry crane). The gantry crane mainly consists of an upper rotating part and a lower running part. The upper structure can realize 360° rotation through a rotating mechanism, and the lower part can realize movement along the track through a trolley traveling mechanism. The upper rotating part realizes the lifting and lowering of goods and the luffing movement of a four-bar linkage through an integrated lifting and luffing mechanism.

[0003] At present, gantry cranes are equipped with overload devices to detect the weight of the heavy objects hoisted by the gantry cranes, protect the gantry cranes, and avoid overloading. However, the current overload devices are generally installed on the large pull rods of the boom system. This installation method often has the problem of excessive wrap angle of the wire rope at the overload pulley, which leads to a larger reverse bending rate of the wire rope, increasing the impact of reverse bending on the life of the wire rope. At the same time, the overload device installed at this position often has related problems such as inaccurate measurement.

[0004] In view of the problems of excessive wire rope wrap angle in the above-mentioned overload device, which affects the service life of the wire rope and inaccurate measurement of the overload device, an accurate measurement structure for the overload device is urgently needed to solve the above problems. Summary of the invention

[0005] Aiming at the problems that the wire rope wrap angle of the current overload device is too large, which affects the service life of the wire rope and the overload device is inaccurate in measurement, the present invention proposes a precise metering structure for the overload device to solve the above problems.

[0006] The present invention proposes a precise metering structure for an overload device, comprising a support, a hinge shaft is installed on the support, a cradle is rotatably installed on the hinge shaft, the cradle is located below the support, a rotating shaft is installed on the cradle, a load take-off pulley is rotatably connected to the rotating shaft, a threaded hole is reserved on the support, a cylindrical pressure sensor is conveniently installed through the threaded hole, a sensor contact plate is provided on the cradle, the contact plate can contact with the cylindrical pressure sensor to achieve force transmission, and the force of the wire rope can be transmitted to the cylindrical pressure sensor. When the door machine is operating, the cradle located at the lower part of the support can reduce the wrap angle of the wire rope, avoid reverse bending of the wire rope, and increase the service life of the wire rope. With the hinge shaft as the center, the tension of the wire rope is converted into the pressure of the cylindrical pressure sensor through the principle of lever, and the pressure is monitored to improve the metering accuracy of the overload device and the use effect of the overload device.

[0007] Furthermore, an anti-rope-slipping frame is installed on the load-taking pulley, and the anti-rope-slipping frame can prevent the wire rope from slipping out of the pulley hub.

[0008] Furthermore, a lower card plate and an upper card plate are installed on the cradle, the lower card plate is located on the upper part of the rotating shaft, and the upper card plate is located on the upper part of the hinge shaft. The lower card plate and the upper card plate can prevent the rotating shaft and the hinge shaft from axial movement.

[0009] Furthermore, a lubricating oil channel is provided on the rotating shaft, and the lubricating oil channel is used to improve the lubrication effect of the rotating shaft and increase the service life.

[0010] Furthermore, a hook-type oil nozzle is installed on the rotating shaft, and lubricating oil is easily added through the hook-type oil nozzle.

[0011] Furthermore, a sliding bearing is installed on the rotating shaft, and the load take-off pulley is installed on the sliding bearing. The sliding bearing can realize axial movement of the load take-off pulley, thereby offsetting the axial force caused by the change of the wire rope drum's rope output angle.

[0012] Furthermore, gaskets are arranged on the inner and outer sides of the cradle, and the gaskets are made of copper-based alloy.

[0013] Furthermore, the gaskets are located outside both ends of the sliding bearing, and abnormal wear of the sliding bearing can be avoided by the gaskets.

[0014] The beneficial effects of the present invention are: The device avoids reverse bending of the wire rope by installing the load take-off pulley at the bottom, thereby increasing the service life of the wire rope. The load take-off pulley can be moved axially through the sliding bearing, thereby offsetting the axial force caused by the change of the wire rope drum's rope output angle. By installing a cylindrical pressure sensor, the metering accuracy of the overload device can be improved, and the use effect of the overload device can be improved. The overall use effect is good and suitable for promotion and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solution of the present invention, the accompanying drawings required for use in the description will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0016] Figure 1 It is a schematic diagram of the main structure of the present invention.

[0017] Figure 2 It is a side sectional structural schematic diagram of the present invention.

[0018] In the figure: 1. rocking frame; 2. load take-off pulley; 3. lower clamping plate; 4. rotating shaft; 5. support; 6. upper clamping plate; 7. cylindrical pressure sensor; 8. hook-type oil nozzle; 9. hinge shaft; 10. anti-rope-off frame; 11. gasket; 12. sliding bearing. DETAILED DESCRIPTION

[0019] In order to make the purpose, features and advantages of the present invention more obvious and easy to understand, the technical scheme of the present invention will be clearly and completely described below in conjunction with the drawings in this specific embodiment. Obviously, the embodiments described below are only part of the embodiments of the present invention, not all of them. Based on the embodiments in this patent, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this patent.

[0020] like Figure 1-2As shown, in this embodiment, the present invention proposes a precise metering structure for an overload device, including a support 5, a hinge shaft 9 is installed on the support 5, a cradle 1 is rotatably installed on the hinge shaft 9, the cradle 1 is located below the support 5, a rotating shaft 4 is installed on the cradle 1, a lower card plate 3 and an upper card plate 6 are installed on the cradle 1, the lower card plate 3 is located on the upper part of the rotating shaft 4, the upper card plate 6 is located on the upper part of the hinge shaft 9, the lower card plate and the upper card plate can prevent the rotating shaft 4 and the hinge shaft 9 from axial movement, and a rotating shaft 4 is rotatably connected to the rotating shaft 4. The load take-off pulley 2 is provided with a lubricating oil channel on the rotating shaft 4, and the lubricating oil channel is used to improve the lubrication effect of the rotating shaft 4 and improve the service life. A hook-type oil nozzle 8 is installed on the rotating shaft 4, and the hook-type oil nozzle 8 is used to facilitate the filling of lubricating oil. A sliding bearing 12 is installed on the rotating shaft 4, and the load take-off pulley 2 is installed on the sliding bearing 12. The sliding bearing 12 can realize the axial movement of the load take-off pulley 2, thereby offsetting the axial force caused by the change of the wire rope drum rope angle. The inner and outer sides of the cradle 1 are both provided with There is a gasket 11, which is made of copper-based alloy. The gasket 11 is located on the outer sides of both ends of the sliding bearing 12. The gasket 11 can avoid abnormal wear of the sliding bearing 12. A cylindrical pressure sensor 7 is installed on the support 5 through a threaded hole. A sensor contact plate is provided on the cradle 1. The contact plate can contact the cylindrical pressure sensor 7 to achieve force transmission, and the force of the wire rope can be transmitted to the cylindrical pressure sensor. An anti-rope-off frame 10 is installed on the load-taking pulley 2. The anti-rope-off frame 10 can prevent the wire rope from escaping from the pulley hub. When the gantry machine is operating, the cradle 1 located at the lower part of the support 5 can reduce the wrap angle of the wire rope, avoid reverse bending of the wire rope, and increase the service life of the wire rope. Through the cylindrical pressure sensor installed on the hinge shaft 9, with the hinge shaft 9 as the center, the tension of the wire rope is converted into the pressure of the cylindrical pressure sensor 7 through the lever principle, and the pressure is monitored to improve the measurement accuracy of the overload device and the use effect of the overload device.

[0021] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A precise metering structure for an overload device, comprising a support (5), characterized in that: A hinge shaft (9) is mounted on the support (5), a cradle (1) is rotatably mounted on the hinge shaft (9), the cradle (1) is located below the support (5), a rotating shaft (4) is mounted on the cradle (1), a load take-off pulley (2) is rotatably connected to the rotating shaft (4), a cylindrical pressure sensor (7) is mounted on the support (5) through a threaded hole, a sensor contact plate is provided on the cradle (1), and the contact plate contacts the cylindrical pressure sensor (7).

2. The precise metering structure for overload device according to claim 1, characterized in that: An anti-rope-off frame (10) is installed on the load-taking pulley (2).

3. The precise metering structure for overload device according to claim 1, characterized in that: A lower clamping plate (3) and an upper clamping plate (6) are mounted on the cradle (1), wherein the lower clamping plate (3) is located on the upper portion of the rotating shaft (4), and the upper clamping plate (6) is located on the upper portion of the hinge shaft (9).

4. The precise metering structure for overload device according to claim 1, characterized in that: A lubricating oil channel is provided on the rotating shaft (4).

5. The precise metering structure for overload device according to claim 1, characterized in that: A hook-type oil nozzle (8) is installed on the rotating shaft (4).

6. The precise metering structure for overload device according to claim 1, characterized in that: A sliding bearing (12) is mounted on the rotating shaft (4), and the load take-off pulley (2) is mounted on the sliding bearing (12).

7. The precise metering structure for overload device according to claim 6, characterized in that: A gasket (11) is arranged on the inner side of the cradle (1), and the gasket (11) is made of a copper-based alloy.

8. The precise metering structure for overload device according to claim 7, characterized in that: The gasket (11) is located outside both ends of the sliding bearing (12).

Images