A hydraulic weighing hook device

Abstract

The purpose of the present invention is to propose a hydraulic weighing hook device to improve the accuracy of weighing and the load-bearing capacity of the hook, and to facilitate maintenance. The hydraulic weighing hook device of the present invention includes a hook and a connecting seat. The key is that the hook device includes a hydraulic cylinder with a piston installed on the top, the connecting seat is fixedly connected to the cylinder body of the hydraulic cylinder, and the hook is fixedly connected to the piston; the hook device also includes a hydraulic pressure sensor for detecting the internal pressure of the hydraulic cylinder, and a data processor that is communicatively connected to the hydraulic pressure sensor and converts the pressure information of the hydraulic pressure sensor into the weight information of the hook lifting. Compared with the weighing principle of the traditional tension sensor, the hook device of the present invention indirectly weighs the weight of the hoisted heavy object by detecting the hydraulic pressure. It has the advantages of a large load-bearing range, convenient maintenance, and high reliability. Moreover, it will not be affected by the shaking of the hook during weighing, and the weighing is more accurate.

Description

Technical Field

[0001] The invention belongs to the technical field of lifting and hoisting, and in particular relates to a hook device with a weighing function. Background Art

[0002] In the existing lifting weighing hook devices, the principle is realized through a tension sensor, that is, the hook is connected to the connecting seat through a tension sensor, and the volume of the tension sensor is generally large, making the hook device large and bulky. Moreover, the tension sensor will deform during use and requires frequent calibration of data. This is the inherent material property of the product itself, which cannot be changed and is difficult to maintain. The hook will inevitably shake during operation, and the change in the force direction of the tension sensor will seriously affect the accuracy of weighing. In addition, the load-bearing range of the tension sensor itself is limited, and it is difficult to adapt to occasions with large lifting weights. Summary of the invention

[0003] The purpose of the invention is to provide a hydraulic weighing hook device to improve the weighing accuracy and the load-bearing capacity of the hook and facilitate maintenance.

[0004] The hydraulic weighing hook device of the present invention includes a hook and a connecting seat. The key point is that the hook device includes a hydraulic cylinder with a piston installed on the top, the connecting seat is fixedly connected to the cylinder body of the hydraulic cylinder, and the hook is fixedly connected to the piston; the hook device also includes a hydraulic pressure sensor for detecting the internal pressure of the hydraulic cylinder, and a data processor that is communicatively connected to the hydraulic pressure sensor and converts the pressure information of the hydraulic pressure sensor into the hook lifting weight information.

[0005] During lifting, the weight lifted by the hook will exert a downward force on the piston through the hook that is equal to the weight of the weight, causing the piston to tend to move downward, thereby increasing the hydraulic pressure in the hydraulic cylinder. The hydraulic pressure is proportional to the weight of the weight. Therefore, the hydraulic pressure in the hydraulic cylinder is detected by the hydraulic pressure sensor, and the weight of the weight can be obtained through a certain conversion. Of course, in order to accurately weigh, the influence of the hook's own weight must be removed. Specifically, the hydraulic pressure sensor can be cleared before weighing, or the hook's own weight can be subtracted during conversion. This will not be repeated here.

[0006] Furthermore, the data processor is connected to one or more displays in communication so as to display the hook lifting weight information on the display for the operator to observe. The above communication connection is preferably a wireless communication connection to avoid the interference of wires on the lifting. Of course, the above data processor can also be connected to other processors to use the hook lifting weight information in the combined control of other devices. For example, the data processor is connected to a computer for counting the lifting weight, so that the total lifting weight within a period of time can be directly counted. There are many other related uses, which will not be repeated here.

[0007] The specific structure of the above hook device can have the following two solutions:

[0008] 1. A through hole is provided at the bottom of the cylinder body of the hydraulic cylinder, and the top end of the hook passes through the through hole upward and is fixedly connected to the piston, and a movable seal is provided between the hook and the through hole. The top end of the hook can be threadedly connected to the piston, or the top end of the hook and the piston are integrally die-casted, and the top end of the hook is threadedly connected to the hook body to ensure the reliability of the connection between the piston and the hook, thereby improving the load-bearing capacity of the hook device. This structure has the advantage of being compact.

[0009] 2. The connecting seat includes connecting plates fixedly connected to opposite sides of the hydraulic cylinder body, the upper part of the connecting plate is higher than the top of the cylinder body, and the upper part of the connecting plate is provided with a vertical through slot; the top of the hook is provided with two symmetrical connecting rods, the tops of the two connecting rods are provided with bending rods that pass horizontally through the vertical through slot and then bend downward, and the bottom ends of the bending rods are fixedly connected to the top surface of the piston. In this structure, the hook will transfer the gravity of the hoisted weight to the piston through the connecting rod and the bending rod, and there is no need to set a through hole on the cylinder body, which can ensure the integrity and reliability of the cylinder body and reduce the possibility of leakage; moreover, when the hoisted weight exceeds the load range of the hydraulic cylinder, it can only cause the horizontal part of the bending rod to press down on the bottom end of the vertical through slot, and will not continue to press down and cause damage to the hydraulic cylinder, so it is safer.

[0010] Furthermore, an overload pressure sensor is provided at the bottom of the vertical through slot, and the overload pressure sensor is connected to an alarm device. The overload pressure sensor is used to detect whether the horizontal part of the bending rod is in contact with the bottom of the vertical through slot. When the horizontal part of the bending rod is in contact with the bottom of the vertical through slot, it indicates that the weight being hoisted has exceeded the bearing capacity of the hydraulic cylinder, or the hydraulic cylinder has leaked, etc. At this time, the overload pressure sensor will be triggered, and the overload pressure sensor will send information to the alarm device for alarm, so that the operator can find the situation in time and deal with it. The above-mentioned alarm device can be one or more of an indicator light and a buzzer, which will not be described here.

[0011] Furthermore, the piston is provided with a sensor mounting hole, the hydraulic pressure sensor is installed at the sensor mounting hole, and the data processor is fixed to the top surface of the piston. In this way, the cylinder body or connecting plate of the hydraulic cylinder will form a barrier, reducing the possibility of contact between the hydraulic pressure sensor and the data processor and other components, thereby protecting the hydraulic pressure sensor and the data processor.

[0012] Compared with the weighing principle of traditional tension sensors, the hook device of the present invention indirectly weighs the weight of the hoisted object by detecting hydraulic pressure. It has the advantages of a large load range, easy maintenance, and high reliability. Moreover, the weighing will not be affected by the shaking of the hook, and the weighing is more accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a partial cross-sectional view of the hook device of Example 1.

[0014] Figure 2 It is a structural principle diagram of the hook device of Example 2.

[0015] The attached drawings indicate: 1. hook; 2. connecting seat; 21. connecting plate; 3. piston; 4. cylinder body; 5. anti-loosening screw; 6. hydraulic pressure sensor; 7. data processor; 8. through groove; 9. connecting rod; 10. bending rod; 11. overload pressure sensor. DETAILED DESCRIPTION

[0016] The following is a detailed description of the specific implementation of the present invention, such as the shape, structure, relative position and connection relationship of each component involved, the function and working principle of each component, etc., through the description of the implementation examples with reference to the accompanying drawings.

[0017] Embodiment 1:

[0018] This embodiment proposes a hydraulic weighing hook device to improve the weighing accuracy and the load-bearing capacity of the hook and facilitate maintenance.

[0019] like Figure 1 As shown, the hook device of hydraulic weighing of this embodiment includes a hook 1 and a connecting seat 2. The key is that the hook device includes a hydraulic cylinder with a piston 3 installed on the top, the bottom end of the connecting seat 2 is fixedly connected to the top of the cylinder body 4 of the hydraulic cylinder, the bottom of the cylinder body 4 of the hydraulic cylinder is provided with a through hole, the top of the hook 1 passes through the through hole upward, and is fixedly connected with the piston 3 by threaded cooperation, there is a movable seal between the hook 1 and the through hole, and a locking screw 5 is provided between the top of the hook 1 and the piston 3. Sealing rings are provided between the hook 1 and the through hole, between the top of the hook 1 and the bottom of the piston 3, and between the side of the piston 3 and the side wall of the cylinder body 4 to ensure the sealing performance.

[0020] The hook device also includes a hydraulic pressure sensor 6 for detecting the internal pressure of the hydraulic cylinder, and a data processor 7 that is connected to the hydraulic pressure sensor 6 and converts the pressure information of the hydraulic pressure sensor 6 into the lifting weight information of the hook 1. The data processor 7 is connected to multiple displays (the displays are not shown in the figure) by wireless communication to display the lifting weight information of the hook 1 on the displays, so that the operator can observe it at different positions. In this embodiment, the piston 3 is provided with a sensor mounting hole, the hydraulic pressure sensor 6 is installed at the sensor mounting hole, and the data processor 7 is fixed to the top surface of the piston 3. In this way, the cylinder body 4 of the hydraulic cylinder will form a barrier to reduce the possibility of the hydraulic pressure sensor 6 and the data processor 7 contacting other components, thereby protecting the pressure sensor and the data processor 7.

[0021] During lifting, the weight lifted by the hook 1 will exert a downward force on the piston 3 of the same magnitude as the weight of the weight through the hook 1, causing the piston 3 to tend to move downward, thereby increasing the hydraulic pressure in the hydraulic cylinder. The hydraulic pressure is proportional to the weight of the weight. Therefore, the hydraulic pressure in the hydraulic cylinder is detected by the hydraulic pressure sensor 6, and the weight of the weight can be obtained through a certain conversion. Of course, in order to accurately weigh, the influence of the weight of the hook 1 itself must be removed. Specifically, the hydraulic pressure sensor 6 can be cleared before weighing, or the weight of the hook 1 itself can be subtracted during data processing. This will not be repeated here.

[0022] Embodiment 2:

[0023] like Figure 2 As shown, different from Example 1, in this embodiment, the connecting seat 2 includes a connecting plate 21 fixedly connected to the opposite sides of the hydraulic cylinder body 4, the upper part of the connecting plate 21 is higher than the top of the cylinder body 4, and the upper part of the connecting plate 21 is provided with a vertical through slot 8; the top of the hook 1 is provided with two symmetrical connecting rods 9, and the tops of the two connecting rods 9 are provided with a bending rod 10 that passes horizontally through the vertical through slot 8 and then bends downward, and the bottom end of the bending rod 10 is fixedly connected to the top surface of the piston 3; the bottom end of the vertical through slot 8 is provided with an overload pressure sensor 11, and the overload pressure sensor 11 is connected to an alarm device (the alarm device is not shown in the figure, and a sound and light alarm device can be used specifically). The installation method of the pressure sensor and data processor 7 of this embodiment is the same as that of Example 1, and will not be repeated here.

[0024] In the process of lifting a heavy object, the hook 1 transmits the gravity of the lifted heavy object to the piston 3 through the connecting rod 9 and the bent rod 10, so that the piston 3 tends to move downward. Compared with the first embodiment, the present embodiment does not need to set a through hole on the cylinder body 4, which is conducive to ensuring the integrity and reliability of the cylinder body 4 and reducing the possibility of leakage.

[0025] The overload pressure sensor 11 is used to detect whether the horizontal part of the bending rod 10 is in contact with the bottom end of the vertical slot 8. When the horizontal part of the bending rod 10 is in contact with the bottom end of the vertical slot 8, it indicates that the weight being hoisted has exceeded the bearing capacity of the hydraulic cylinder, or the hydraulic cylinder has leaked, etc. At this time, the overload pressure sensor 11 will be triggered, and the overload pressure sensor 11 will send information to the alarm device for alarm, so that the operator can find the situation in time and deal with it. Moreover, when the hoisted weight exceeds the bearing range of the hydraulic cylinder, it will cause the horizontal part of the bending rod 10 to press down on the bottom end of the vertical slot 8, and will not continue to press down and damage the hydraulic cylinder, so it is safer.

[0026] The present invention is described above by way of example in conjunction with the accompanying drawings. It is obvious that the specific design of the present invention is not limited to the above-mentioned method. As long as various non-substantial improvements are made using the concept and technical solution of the present invention, or the concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the protection scope of the present invention.

Claims

1. A hydraulic weighing hook device, comprising a hook and a connecting seat, It is characterized in that The hook device includes a hydraulic cylinder with a piston installed on the top, the connecting seat is fixedly connected to the cylinder body of the hydraulic cylinder, and the hook is fixedly connected to the piston; the hook device also includes a hydraulic pressure sensor for detecting the internal pressure of the hydraulic cylinder, and a data processor that is communicatively connected to the hydraulic pressure sensor and converts the pressure information of the hydraulic pressure sensor into the lifting weight information of the hook; The data processor is wirelessly connected to one or more displays for displaying the hook hoisting weight information on the display; The connecting seat comprises connecting plates fixedly connected to opposite sides of the hydraulic cylinder body, the upper part of the connecting plate is higher than the top of the cylinder body, and the upper part of the connecting plate is provided with a vertical through slot; the top of the hook is provided with two symmetrical connecting rods, the tops of the two connecting rods are provided with bending rods that pass horizontally through the vertical through slots and then bend downwards, and the bottom ends of the bending rods are fixedly connected to the top surface of the piston; An overload pressure sensor is provided at the bottom end of the vertical through slot, and the overload pressure sensor is connected to an alarm device; The piston is provided with a sensor mounting hole, the hydraulic pressure sensor is mounted at the sensor mounting hole, and the data processor is fixed to the top surface of the piston; The overload pressure sensor is used to detect whether the horizontal part of the bending rod is in contact with the bottom end of the vertical through slot. When the horizontal part of the bending rod is in contact with the bottom end of the vertical through slot, it indicates that the hoisted weight has exceeded the bearing capacity of the hydraulic cylinder. When the hoisted weight exceeds the load range of the hydraulic cylinder, the horizontal part of the bending rod will be pressed down on the bottom end of the vertical through slot and will not continue to press down to cause damage to the hydraulic cylinder.

Images