Load lifting device with weight display function

Abstract

The utility model aims to disclose a load lifting device with a weight display function, which relates to the technical field of load lifting and comprises a lifting column, a lifting arm, a hydraulic system, an MCU (Microprogrammed Control Unit) controller and a first display screen, the hydraulic system drives the lifting arm to ascend and descend along the lifting column, and the hydraulic system is provided with a pressure sensor. The sampling circuit is used for converting a collected pressure signal of the pressure sensor into a direct-current voltage signal; the direct current voltage signal is input into the MCU controller; the hydraulic system has the advantages that the pressure sensor is arranged at an outlet of a hydraulic oil way of the hydraulic system, the pressure directly reflects lifting force needed for lifting the load, the pressure of the pressure sensor is collected and converted into the direct-current voltage signal of 0-3.3 V, and the load weight is displayed on the first display screen. And the direct-current voltage signal is converted into load weight through the MCU controller and is displayed on the first display screen, so that an operator can see the load weight in real time.

Description

Technical Field

[0001] This utility model relates to the field of load lifting technology, and in particular to a load lifting device with a weight display function. Background Technology

[0002] Load lifting, such as for vehicles, involves raising the object to a certain height for maintenance and other operations. Currently, load lifting systems have overload alarm functions, but they cannot display the weight of the load.

[0003] In view of this, it is necessary to develop a load lifting device with weight display function to solve the above problems. Summary of the Invention

[0004] To solve the above-mentioned technical problems, the purpose of this utility model is to disclose a load lifting device with weight display function.

[0005] To achieve the above-mentioned objectives, this utility model provides a load lifting device with weight display function, including a lifting column, a lifting arm, a hydraulic system, an MCU controller, and a first display screen;

[0006] The hydraulic system drives the lifting arm to move up and down along the lifting column, and the hydraulic system is equipped with a pressure sensor;

[0007] The sampling circuit converts the pressure signal acquired by the pressure sensor into a DC voltage signal;

[0008] The DC voltage signal is input to the MCU controller;

[0009] The MCU controller converts the DC voltage signal into load weight and displays it on the first display screen.

[0010] Preferably, the first display screen is mounted on the side of the lifting column.

[0011] Preferably, a pressure sensor is installed at the hydraulic oil circuit outlet of the hydraulic system.

[0012] Preferably, the sampling circuit includes a signal input terminal and a signal output terminal;

[0013] The output terminal of the pressure sensor is connected to the signal input terminal;

[0014] The signal output terminal is connected to the MCU controller via an ADC module.

[0015] Preferably, the sampling circuit further includes a common-mode filter, a first operational amplifier module, and a second operational amplifier module.

[0016] Preferably, the common-mode filter is model ACM2012-121-2P-T002.

[0017] Preferably, the common-mode filter is used to suppress common-mode interference in the pressure sensor signal.

[0018] Preferably, a low-pass filter circuit consisting of a first resistor and a first capacitor is provided between the first operational amplifier module and the second operational amplifier module.

[0019] Preferably, the output voltage range of the second operational amplifier module is 0V-3.3V.

[0020] Preferably, the MCU controller has a built-in weight calibration module.

[0021] Compared with the prior art, the technical effects of this utility model are as follows: The pressure sensor of this utility model is set at the hydraulic oil circuit outlet of the hydraulic system, that is, at the oil inlet of the hydraulic lifting cylinder. The pressure directly reflects the lifting force required to lift the load. By collecting the pressure of the pressure sensor and converting it into a DC voltage signal of 0-3.3V, the DC voltage signal is converted into the load weight by the MCU controller and displayed on the first display screen, so that the operator can see the load weight in real time and provide objective data support for whether the lifting machine is overloaded. Attached Figure Description

[0022] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0023] Figure 1 This is a three-dimensional structural diagram of the load lifting device with weight display function of this utility model.

[0024] Figure 2 This is the schematic diagram of the sampling circuit of this utility model.

[0025] Figure 3 This is a block diagram of the signal conversion of the pressure sensor of this utility model.

[0026] Figure 4 This is a schematic diagram of the hydraulic system of this utility model.

[0027] Among them, 1. Lifting column; 11. First display screen; 12. Remote control; 13. Second display screen; 2. Lifting arm; 3. Hydraulic lifting cylinder; 4. Hydraulic oil circuit outlet; 5. Pressure sensor; 6. Oil inlet. Detailed Implementation

[0028] The present utility model will be described in detail in conjunction with the embodiments shown in the accompanying drawings. It should be noted, however, that these embodiments are not limitations on the present utility model, and any equivalent transformation or substitution in terms of function, method, or structure made by those of ordinary skill in the art based on these embodiments shall fall within the protection scope of the present utility model.

[0029] Embodiment 1

[0030] Refer Figures 1 to 4 As shown, this embodiment discloses a specific implementation of a load lifting device with a weight display function (hereinafter referred to as the "lifting device").

[0031] A load lifting device with a weight display function, refer Figures 1 to 4 As shown, this embodiment is preferably applicable to a two-column lift, including a lifting column 1, a lifting arm 2, a hydraulic system, an MCU controller, and a first display screen 11. The first display screen is installed on the side of the lifting column for the operator to easily view the weight data. The hydraulic system drives the lifting arm 2 to move up and down along the lifting column 1, and a pressure sensor 4 is provided at the hydraulic oil outlet of the hydraulic system. See Figure 2 And Figure 3 , the sampling circuit converts the pressure signal of the pressure sensor collected by it into a DC voltage signal. The DC voltage signal is input into the MCU controller. The MCU controller converts the DC voltage signal into the load weight and displays it on the first display screen.

[0032] See Figure 4 , the hydraulic system supplies hydraulic oil to the hydraulic lifting cylinder 3 through the hydraulic oil circuit L, and drives the lifting arm 2 to move up and down through the pressure of the hydraulic oil. A pressure sensor 5 is provided at the hydraulic oil outlet 4 of the hydraulic system. The hydraulic oil outlet is connected to the oil inlet 6 of the hydraulic lifting cylinder 3 through a hydraulic pipe. The pressure data of the pressure sensor 5 directly reflects the lifting force required for the lifting load. The pressure of the pressure sensor is collected through the sampling circuit and converted into a DC voltage signal of 0 - 3.3V. This DC voltage signal is converted into the load weight by the MCU controller and displayed on the first display screen, enabling the operator to see the load weight in real time and providing objective data support for whether the lift is overloaded. To facilitate the operator to more directly view the weight data of the load, the lifting device also has a remote control 12. A first Bluetooth module is provided on the first display screen 11, and a second Bluetooth module and a second display screen 13 are provided on the remote control 12. The first Bluetooth module and the second Bluetooth module are paired. The first Bluetooth module transmits the weight data of the load to the second Bluetooth module and displays it on the second display screen 13, enabling the operator to directly see the load weight data while operating the lifting device, which is more intuitive and convenient.

[0033] See Figure 2 and Figure 3 The sampling circuit includes a signal input terminal AI1+ and a signal output terminal AI1_MCU; the output terminal of the pressure sensor 5 is connected to the signal input terminal AI1+, and the output of the pressure sensor 5 is a DC voltage in the mV range; the signal output terminal AI1_MCU is connected to the MCU controller through an ADC module, and the ADC module converts the DC voltage signal into a voltage signal acceptable to the MCU controller. Specifically, the sampling circuit further includes a common-mode filter, a first operational amplifier module U17A, and a second operational amplifier module U17B. The common-mode filter is model ACM2012-121-2P-T002, and both the first operational amplifier module U17A and the second operational amplifier module U17B are model LMV358TP-SR. The common-mode filter ACM2012-121-2P-T002 is used to suppress common-mode interference in the signal from the pressure sensor 5. A low-pass filter circuit composed of a first resistor R214 and a first capacitor C137 is provided between the first operational amplifier module U17A and the second operational amplifier module U17B. The purpose of the low-pass filter circuit is to smooth the signal. The output voltage range of the second operational amplifier module U17B is 0V-3.3V. After conversion by the ADC module, the 0V-3.3V DC voltage signal is converted into a voltage signal acceptable to the MCU controller. The MCU controller has a built-in weight calibration module. The calibration module sets the curve relationship between the DC voltage received by the MCU controller and the load weight, thereby realizing the display of the weight of the load while lifting it.

[0034] Compared with the prior art, the technical effects of this embodiment are as follows: The pressure sensor 5 in this embodiment is set at the hydraulic oil outlet 4 of the hydraulic system, that is, at the oil inlet 6 of the hydraulic lifting cylinder 3. The pressure directly reflects the lifting force required to lift the load. By collecting the pressure of the pressure sensor 5 and converting it into a DC voltage signal of 0-3.3V, the DC voltage signal is converted into the load weight by the MCU controller and displayed on the first display screen 11 and the second display screen 13, so that the operator can see the load weight in real time and provide objective data support for whether the lifting machine is overloaded.

Claims

1. A load lifting device with weight display function, characterized in that, Includes lifting column, lifting arm, hydraulic system, MCU controller and first display screen; The hydraulic system drives the lifting arm to move up and down along the lifting column, and the hydraulic system is equipped with a pressure sensor; The sampling circuit converts the pressure signal acquired by the pressure sensor into a DC voltage signal; The DC voltage signal is input to the MCU controller; The MCU controller converts the DC voltage signal into load weight and displays it on the first display screen.

2. The load lifting device with weight display function as described in claim 1, characterized in that, The first display screen is mounted on the side of the lifting column.

3. The load lifting device with weight display function as described in claim 1, characterized in that, A pressure sensor is installed at the hydraulic oil circuit outlet of the hydraulic system.

4. The load lifting device with weight display function as described in any one of claims 1-3, characterized in that, The sampling circuit includes a signal input terminal and a signal output terminal; The output terminal of the pressure sensor is connected to the signal input terminal; The signal output terminal is connected to the MCU controller via an ADC module.

5. The load lifting device with weight display function as described in claim 4, characterized in that, The sampling circuit also includes a common-mode filter, a first operational amplifier module, and a second operational amplifier module.

6. The load lifting device with weight display function as described in claim 5, characterized in that, The common-mode filter is model ACM2012-121-2P-T002.

7. The load lifting device with weight display function as described in claim 6, characterized in that, The common-mode filter is used to suppress common-mode interference in the pressure sensor signal.

8. The load lifting device with weight display function as described in claim 7, characterized in that, A low-pass filter circuit consisting of a first resistor and a first capacitor is provided between the first operational amplifier module and the second operational amplifier module.

9. The load lifting device with weight display function as described in claim 8, characterized in that, The output voltage range of the second operational amplifier module is 0V-3.3V.

10. The load lifting device with weight display function as described in claim 9, characterized in that, The MCU controller has a built-in weight calibration module.

Images