Control method of electric hydraulic jack

Abstract

The invention discloses a control method of an electric hydraulic jack, which is characterized in that when the jack is controlled to rise, a rising button on control terminal equipment is directly pressed, a signal is sent to a main control module, a motor is controlled to start, the motor drives an electric pump to start, and hydraulic oil is pumped into the jack to drive the jack to jack; when the jack is controlled to descend, a descending button on the control terminal equipment is pressed, a signal is sent to the main control module, the electromagnet I is controlled to be powered on, and after being powered on, the electromagnet I drives a transmission part used for pushing an oil drain valve to act to open the oil drain valve for oil return, so that the jack descends; and the second electromagnet is connected with a metal piece in a magnetic attraction mode after being powered on, so that the transmission piece and the first electromagnet are kept at the position where the oil drain valve is pushed to be opened, and the main control module controls the first electromagnet to be powered off. The device is used for controlling the operation of the whole jack, and is also used for guaranteeing the normal operation of the jack, reducing faults, prolonging the service life and improving the safety during use.

Description

Technical Field

[0001] The invention relates to an electric hydraulic jack, in particular to a control method of the electric hydraulic jack. Background Art

[0002] An electric hydraulic jack is a jack that uses an electric motor as a power element to drive the jack to lift. When the jack is lowered, the oil is released by opening the oil drain valve. In the prior art, there is a technical solution that uses a push-pull electromagnet to drive the oil drain valve to open and close. By energizing the push-pull electromagnet, the push-pull electromagnet pushes the connecting rod to drive the oil drain valve to open and release the oil. During operation, the operator presses the corresponding button, and the main control module controls the corresponding motor or push-pull electromagnet to drive the jack to lift and lower.

[0003] However, in actual use, the motor and electromagnet often overheat, overcurrent, and short circuit. Overheating and overcurrent will affect the normal use of the jack, and will also affect the service life of the motor and electromagnet, and even directly damage them during use. Once damaged, the jack will fail. If there is a heavy object on the jack, the jack may not be able to drop or lift. In addition, due to the heavy load, the force driving the oil drain valve to open is greater, resulting in a large power of the push-pull electromagnet at startup, otherwise it is difficult to open the oil drain valve. Once the power at startup is large, it will cause its temperature to rise rapidly and overheat. Maintaining this power for a long time during the oil drain process will cause the temperature of the push-pull electromagnet to overheat for a long time and high power consumption. For this reason, a control method for an electric hydraulic jack is proposed. Summary of the invention

[0004] The purpose of the present invention is to solve the above problems and to provide a control method for an electric hydraulic jack.

[0005] In order to achieve the above object, the present invention provides the following technical solution: a control method of an electric hydraulic jack, characterized in that: When controlling the jack to rise, simply press the rise button on the control terminal device to send a signal to the main control module, which controls the motor to start, and the motor drives the electric pump to start, pumping hydraulic oil into the jack to drive it to rise; When controlling the jack to descend, by pressing the descending button on the control terminal device, a signal is sent to the main control module, and the main control module controls the power supply to electromagnet 1. After electromagnet 1 is energized, it drives the transmission part used to push the oil drain valve to open the oil drain valve to return oil, so that the jack descends; then, electromagnet 2 is energized, and after electromagnet 2 is energized, it is magnetically connected with a metal part, so that the transmission part and electromagnet 1 maintain the position of pushing the oil drain valve to open, and the main control module controls electromagnet 1 to cut off the power.

[0006] Further preferably, directly pressing the up button on the control terminal device to lift the jack when controlling the jack to rise is replaced by first pressing the no-load positioning button on the control terminal device to lift the jack; when the no-load positioning button is pressed, a signal is sent to the main control module, the main control module controls the motor to start, the motor drives the electric pump to start, hydraulic oil is pumped into the jack to drive it to lift, when the jack comes into contact with the lifted object during the rising process, when the motor current exceeds the set no-load current parameter, the main control module controls the motor to suspend work, and then, when starting the jack to lift again, it is necessary to press the up button to allow the jack to continue lifting.

[0007] Further preferably, the current and temperature parameters of the motor, electromagnet 1 and electromagnet 2 are monitored in real time during operation. If they are within the set range, they operate normally. If they exceed the set range, the main control module controls the motor, electromagnet 1 and electromagnet 2 to suspend operation.

[0008] Further preferably, it also includes a current detection unit which establishes a communication relationship with the main control module and performs real-time detection of the motor current parameters.

[0009] Further preferably, it also includes a display module controlled by the main control module to display different conditions of the jack.

[0010] Further preferably, the battery voltage is monitored in real time, and when the voltage of the battery pack is lower than a set value, the control display module is started and the operator is informed that the battery voltage is too low.

[0011] Further preferably, the display module is at least a display light or a display screen.

[0012] Further preferably, the control terminal device and the main control module are connected by wire or wirelessly.

[0013] Further preferably, when a wireless connection is adopted, the control terminal device and the main control module establish a wireless connection using a communication module.

[0014] Further preferably, the communication module is any one of a Bluetooth communication module and a network communication module.

[0015] The beneficial effects of the present invention are as follows: through the configuration of the present invention, the operation of the entire electric jack is controlled, and at the same time, the normal operation of the jack is ensured, failures are reduced, energy consumption is reduced, and the service life and safety during use are increased; By setting and controlling the second electromagnet, after the first electromagnet is controlled to drive the oil drain valve to open, the second electromagnet is controlled to move to maintain the position of the first electromagnet in place, and then the first electromagnet is powered off, and only the second electromagnet is relied on to maintain the first electromagnet in place; since the energy consumption required to maintain the first electromagnet in a working state is low and the heat generation is low, it can work effectively for a long time, so by setting and controlling the second electromagnet, while ensuring the function of the oil drain valve, the overall working energy consumption of the electromagnet is reduced, and at the same time, it is prevented that the first electromagnet is in a high-power state for a long time, causing the temperature of the first electromagnet to reach the set high temperature value too quickly, thereby preventing the first electromagnet from stopping working after the temperature exceeds the set temperature value limit when the jack is not completely lowered, resulting in the suspension of the jack's lowering work, and it is necessary to wait until the temperature of the first electromagnet drops before it can work again, affecting the work efficiency; Through the setting of the no-load positioning button, when the no-load positioning button is pressed, the jack can only be lifted and positioned when it is no-load, and cannot be lifted with load. When the jack contacts the bottom of the car during the rising process, as the jack is lifted, the jack load increases, which drives the motor load to increase, and the corresponding motor working current increases. When the motor current exceeds the set no-load current parameter, the main control module controls the motor to suspend work, and the user confirms his own position and whether there are people around the car. After confirmation, the user controls the motor to start again by pressing the up button to perform the lifting action, thereby preventing the user from lifting the car at the bottom of the car or in an unsafe position close to the car when the jack is lifted, which may pose a safety hazard. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a control schematic diagram of the present invention; Figure 2 is a control schematic diagram of another implementation mode of the display module in the present invention; Figure 3 It is a schematic diagram of the control flow during the rising process of the present invention; Figure 4 It is a schematic diagram of the control flow of the present invention during descent. DETAILED DESCRIPTION

[0017] Hereinafter, we will further illustrate the control method of the electric hydraulic jack described in the present invention with reference to the accompanying drawings.

[0018] It should be noted that all directional indications such as up, down, left, right, front, back, etc. in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture as shown in the accompanying drawings. If the specific posture changes, the directional indication will also change accordingly.

[0019] In the present invention, unless otherwise clearly defined and limited, the terms "connection", "fixation", etc. should be understood in a broad sense; for example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0020] See also Figure 1-Figure 4 As shown in , a control method for an electric hydraulic jack is characterized in that the control method is as follows: the control terminal device and the main control module are connected by wire or wirelessly; The main control module is arranged on the electric hydraulic jack, and the control terminal is connected to the main control module by wire or wirelessly. When the wireless connection is adopted, the control terminal device and the main control module establish a wireless connection by using a communication module, and the communication module is any one of a Bluetooth communication module or a network communication module; It also includes a display module controlled by the main control module for displaying different conditions of the jack, the display module is at least one display light or display screen, the display light or display screen can be a green light, a red light and a yellow light, the yellow light is used to display that the battery pack voltage is lower than the set value, the red light is used to display that the temperature parameters of the electromagnet 1, the electromagnet 2 and the motor exceed the set value, and the green light is used to display that the power is turned on and works normally; the jack can work normally when the green light is on, and the jack stops working when the red light is on. When the yellow light flashes, the motor cannot be started, and can only drive the electromagnet 1 and the electromagnet 2 to act; It also includes a current detection unit that establishes a communication relationship with the main control module and detects the motor current parameters in real time; the motor current is monitored by the current detection unit when the motor is started; the no-load current parameter is determined by detecting the current value of the jack in the no-load state, and then the no-load current parameter is set according to the detected data; It also includes real-time monitoring of the current and temperature parameters of the motor, electromagnet 1 and electromagnet 2 when they are working. If they are within the set range, they will work normally. If they exceed the set range, the main control module will control the motor, electromagnet 1 and electromagnet 2 to stop working; the circuit current parameter is to monitor whether electromagnet 1 and electromagnet 2 have overcurrent or short circuit. If overcurrent or short circuit occurs, electromagnet 1 or electromagnet 2 will be controlled to stop running.

[0021] In one embodiment, when a wireless Bluetooth control terminal device is used, one-to-one coding is required for effective operation to prevent other similar remote control signals from driving the product. Example 1

[0022] In this embodiment, when controlling the jack to rise, by pressing the rise button, a signal is sent to the main control module, the main control module controls the motor to start, the motor drives the electric pump to start, and the electric pump pumps hydraulic oil into the jack to drive it to rise; During the lifting process of the jack, real-time monitoring is performed to see whether the motor parameters are within the set parameter range; If the current parameter of the motor is detected to exceed the set current parameter of the motor or the temperature of the motor is detected to exceed the set value, the main control module will control the motor to stop running and turn on the red light; When the jack is controlled to descend, by pressing the descending button, the descending button sends a signal to the main control module, and the main control module controls the power supply to the electromagnet 1. After the electromagnet 1 is energized, it drives the transmission part to move, and the transmission part drives the oil drain valve to open the oil drain valve to return oil, so that the jack is lowered; the electromagnet 1 adopts a push-pull electromagnet or other push electromagnet; After the electromagnet 1 moves into position, the main control module controls the electromagnet 2 to be energized, and the electromagnet 2 magnetically attracts the metal base, so that the transmission part and the electromagnet 1 are kept in the position of action; at the same time, the electromagnet 1 is controlled to be powered off; the electromagnet 1 moves into position means that the electromagnet 1 pushes the transmission part forward after being energized, and the oil drain valve is opened during the action process by the transmission part, so that the oil drain valve is in an open state; During the descent of the jack, the first and second electromagnets are monitored in real time; During the monitoring process, if the temperature parameters of the monitored electromagnet 1 and electromagnet 2 are within the set temperature value range, normal operation is maintained; if the monitored circuit current parameters are within the normal range, normal operation is maintained; If it is detected that the temperature of electromagnet 1 and electromagnet 2 exceeds the set temperature value, the main control module controls electromagnet 1 and electromagnet 2 to cut off the power, stop working and control the red light to light up, and wait for the temperature of electromagnet 1 and electromagnet 2 to drop below the set value before turning on again to work; if it is detected that the current of electromagnet 2 or electromagnet 1 circuit is overcurrent or short circuit during working, it will stop running; The voltage of the battery pack is monitored in real time during the real-time working process. If the voltage of the battery pack is lower than the set value, the control display module will flash a yellow light to inform the user that the battery pack voltage is low. At this time, the voltage of the battery pack cannot start the motor and can only drive electromagnet 1 and electromagnet 2 to operate. Example 2

[0023] The difference between this embodiment and embodiment 1 is that this embodiment adds a no-load positioning button for controlling the no-load positioning when the jack rises, thereby improving the safety of use. When controlling the jack to rise: first press the no-load positioning button on the control terminal device to lift the jack; when the no-load positioning button is pressed, a signal is sent to the main control module, and the main control module controls the motor to start, and the motor drives the electric pump to start, and the hydraulic oil is pumped into the jack to drive it to rise. When the jack contacts the object to be lifted during the rising process, when the motor current exceeds the set no-load current parameter, the main control module controls the motor to stop working; At this time, the user observes his own position and whether there are people and safety hazards around the car. After confirming that it is safe, he presses the up button again to send a signal to the main control module. The main control module controls the motor to start again and drive the jack to continue the lifting work.

[0024] The protection scope of the present invention is not limited to the above embodiments and their variations. Conventional modifications and replacements made by those skilled in the art based on the contents of this embodiment all fall within the protection scope of the present invention.

Claims

1. A control method for an electric hydraulic jack, characterized in that: When controlling the jack to rise, simply press the rise button on the control terminal device to send a signal to the main control module, which controls the motor to start, and the motor drives the electric pump to start, pumping hydraulic oil into the jack to drive it to rise; When controlling the jack to descend, by pressing the descending button on the control terminal device, a signal is sent to the main control module, and the main control module controls the power supply to electromagnet 1. After electromagnet 1 is energized, it drives the transmission part used to push the oil drain valve to open the oil drain valve to return oil, so that the jack descends; then, electromagnet 2 is energized, and after electromagnet 2 is energized, it is magnetically connected with a metal part, so that the transmission part and electromagnet 1 maintain the position of pushing the oil drain valve to open, and the main control module controls electromagnet 1 to cut off the power.

2. The control method of an electric hydraulic jack according to claim 1, characterized in that: The method of directly pressing the rising button on the control terminal device to lift the jack when controlling the jack to rise is replaced by first pressing the no-load positioning button on the control terminal device to lift the jack; when the no-load positioning button is pressed, a signal is sent to the main control module, the main control module controls the motor to start, the motor drives the electric pump to start, hydraulic oil is pumped into the jack to drive it to rise, when the jack contacts the object to be lifted during the rising process, when the motor current exceeds the set no-load current parameter, the main control module controls the motor to stop working, and then, when the jack is started again to rise, the rising button needs to be pressed to allow the jack to continue to rise.

3. A control method for an electric hydraulic jack according to claim 1 or 2, characterized in that: It also includes real-time monitoring of the current and temperature parameters of the motor, electromagnet 1 and electromagnet 2 when they are working. If they are within the set range, they will work normally. If they exceed the set range, the main control module will control the motor, electromagnet 1 and electromagnet 2 to stop working.

4. The control method of an electric hydraulic jack according to claim 3, characterized in that: It also includes a current detection unit which establishes a communication relationship with the main control module and performs real-time detection of motor current parameters.

5. The control method of an electric hydraulic jack according to claim 4, characterized in that: It also includes a display module controlled by the main control module for displaying different conditions of the jack.

6. The control method of an electric hydraulic jack according to claim 5, characterized in that: It also includes real-time monitoring of the battery voltage. When the voltage of the battery pack is lower than the set value, the control display module starts and informs the operator that the battery voltage is too low.

7. The control method of an electric hydraulic jack according to claim 5, characterized in that: The display module is at least a display light or a display screen.

8. A control method for an electric hydraulic jack according to claim 1 or 2, characterized in that: The control terminal device and the main control module are connected by wire or wirelessly.

9. The control method of an electric hydraulic jack according to claim 8, characterized in that: When wireless connection is adopted, the control terminal device and the main control module establish a wireless connection using the communication module.

10. The control method of an electric hydraulic jack according to claim 9, characterized in that: The communication module is any one of a Bluetooth communication module and a network communication module.

Images