CN213112435U - Aerial working platform truck - Google Patents
Aerial working platform truck Download PDFInfo
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- CN213112435U CN213112435U CN202021780528.2U CN202021780528U CN213112435U CN 213112435 U CN213112435 U CN 213112435U CN 202021780528 U CN202021780528 U CN 202021780528U CN 213112435 U CN213112435 U CN 213112435U
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Abstract
The utility model provides a high altitude construction platform truck, include: the device comprises an operation platform, a scissor-type arm support, a pin shaft type sensor and a bearing monitoring device; the operation platform is hinged with the scissor type arm support through a pin shaft type sensor, and the pin shaft type sensor is used for measuring the strain force at the hinged position of the operation platform and the scissor type arm support and generating a stress signal; and the load-bearing monitoring device acquires the stress signal, judges whether the load-bearing capacity of the operation platform is overloaded or not according to the corresponding relation between the preset load capacity of the operation platform and the stress signal, and executes corresponding operation based on the judgment result. The utility model discloses an aerial working platform car can realize cutting fork type high altitude and make platform load state real-time supervision and overload action limiting function, has avoided the error that causes through cantilever crane angle and hydro-cylinder pressure side feedback weight, and measuring result is more accurate and reliable, and the security is better.
Description
Technical Field
The utility model relates to an aerial working technical field especially relates to an aerial working platform truck.
Background
The scissor-type aerial work platform truck is used for conveying workers and using equipment to operate at a specified height, and can utilize self power to walk in a work site in a short distance. The scissor-fork type aerial work platform truck comprises an arm support, a work platform and a lower vehicle. The operation control module of the operation platform is generally divided into a platform control module and a get-off control module. The platform control module is arranged on the operation platform, is operated through the handle unit (namely the PCU module), and can operate the operation platform to walk, turn, change the amplitude of the upward vibration, change the amplitude of the downward vibration and the like. The get-off control module is in an auxiliary operation mode, and can operate the working platform to perform up-amplitude and down-amplitude actions through the operation of the get-off operation panel. As aerial work equipment, the overload protection function of a work platform is an important ring for measuring the safety protection function of the whole machine. In the prior art, different angular positions of an arm support are recorded, the load of a platform is weighed and calculated according to a change curve between the height of the arm support and the pressure of an amplitude-variable oil cylinder of the arm support, in addition, the influence of the environmental temperature on the pressure of hydraulic oil is considered, and temperature parameters are added for experience compensation, so that the weighing error is reduced; however, when the load state is different, the change curve does not change in a linear proportion, and a certain error exists in the measurement of the platform load. Therefore, a more accurate measurement solution is needed.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model aims to solve a technical problem to provide an aerial working platform truck.
According to the utility model discloses a first aspect provides an aerial working platform car, include: the device comprises an operation platform, a scissor-type arm support, a pin shaft type sensor and a bearing monitoring device; the operation platform is hinged with the scissor type arm support through the pin shaft type sensor, and the pin shaft type sensor is used for measuring the strain force at the hinged position of the operation platform and the scissor type arm support and generating a stress signal; and the bearing monitoring device is electrically connected with the pin shaft type sensor, acquires the stress signal, judges whether the bearing weight of the operation platform is overloaded or not according to the corresponding relation between the preset load weight of the operation platform and the stress signal, and executes corresponding operation based on the judgment result.
Optionally, the method further comprises: an execution unit; and the bearing monitoring device is connected with the execution unit and used for generating a control signal and sending the control signal to the execution unit when the judgment result is that the operation platform is overloaded, so that the execution unit executes the operation corresponding to the control signal.
Optionally, the execution unit includes: a boom lifting electromagnetic valve and a walking electromagnetic valve; the bearing monitoring device is respectively electrically connected with the boom lifting electromagnetic valve and the walking electromagnetic valve, and is used for generating a lifting stop control signal and a walking stop control signal under the condition that the judgment result is that the operation platform is overloaded, and respectively sending the lifting stop control signal and the walking stop control signal to the boom lifting electromagnetic valve and the walking electromagnetic valve.
Optionally, the method further comprises: an alarm device; and the bearing monitoring device is electrically connected with the alarm device and is used for sending an alarm signal to the alarm device when the judgment result is that the operation platform is overloaded.
Optionally, the method further comprises: a human-computer interaction unit; and the bearing monitoring device is electrically connected with the human-computer interaction unit and is used for receiving the calibration instruction sent by the human-computer interaction unit and sending the platform load capacity and the fault reminding information corresponding to the stress signal to the human-computer interaction unit.
Optionally, the method further comprises: a signal processing module; the signal processing module is respectively electrically connected with the pin shaft type sensor and the bearing monitoring device, and is used for correspondingly processing the stress signal sent by the pin shaft type sensor and sending the processed stress signal to the bearing monitoring device; wherein, signal processing module passes through the bus with the bearing monitoring device electricity is connected, the bus includes: a CAN bus.
Optionally, the number of the pin shaft sensors is four, and the four pin shaft sensors are respectively located at four corners of the bottom of the work platform.
The utility model discloses an aerial working platform car, work platform pass through the pin shaft type sensor and cut fork cantilever crane articulated, the pin shaft type sensor is used for measuring the strain capacity of work platform and cut fork cantilever crane articulated department, and whether the bearing capacity of judging work platform is overloaded based on stress signal and according to the corresponding relation between the predetermined work platform loading capacity and the stress signal, can realize cutting fork type aerial working platform loading state real-time supervision and overload action restriction function; by converting the platform load into the strain force of the pin shaft position, the error caused by the arm support angle and the feedback weight of the pressure side surface of the oil cylinder is avoided, meanwhile, the weighing precision error caused by the influence of the environmental temperature on the pressure can be effectively avoided, and the measuring result is more accurate and reliable; can satisfy when the platform operation, carry out real time monitoring to whole car platform loading capacity, prevent to cause the whole car to tumble because of overloading, cause the incident, the security is better.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without inventive laboriousness.
FIG. 1A is a schematic structural view of one embodiment of an aerial platform truck; FIG. 1B is a schematic view of the connection of a load bearing monitoring device to a sensor; FIG. 1C is a schematic view of the sensor installation;
fig. 2 is a schematic diagram of a hardware architecture for implementing a load-bearing monitoring function in an embodiment of the aerial lift truck of the present invention;
fig. 3 is a schematic diagram of a hardware architecture for implementing a load-bearing monitoring function in another embodiment of the aerial lift truck of the present invention;
FIG. 4 is a schematic illustration of a position for calibrating the counterweight.
Detailed Description
The present invention now will be described more fully hereinafter with reference to the accompanying drawings, in which exemplary embodiments of the invention are shown. The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
As shown in fig. 1A and 1B, the utility model provides an aerial work platform truck, including getting off 1, work platform 3, scissor type cantilever crane 2, pin shaft type sensor 01 and bearing monitoring device 02. The handle operating device 4 can control the actions of walking, steering, upper amplitude variation, lower amplitude variation and the like of the aerial work platform truck. The operation platform 3 is hinged with the scissor type arm support 2 through a pin shaft type sensor 01, and the pin shaft type sensor 01 is used for measuring the strain force at the hinged position of the operation platform and the scissor type arm support and generating a stress signal. The pin sensor 01 may be any of various existing pin sensors, such as a strain gauge pin sensor.
The number of the pin shaft type sensors can be four, and the four pin shaft type sensors are respectively positioned at four corners of the bottom of the operation platform. As shown in fig. 1C, the mounting positions of the pin-type sensor 01 are indicated by 001 and 002 in the figure, and there are two mounting positions on the corresponding back surface. The bearing monitoring device 02 is electrically connected with the pin shaft type sensor 01, acquires the stress signal, judges whether the bearing weight of the operation platform 1 is overloaded according to the corresponding relation between the preset operation platform load capacity and the stress signal, and executes corresponding operation based on the judgment result.
In one embodiment, as shown in fig. 2, the load-bearing monitoring device 02 is connected to the execution unit 03, and in a state that the work platform is overloaded as a result of the determination, the load-bearing monitoring device 02 generates a control signal and sends the control signal to the execution unit 03, so that the execution unit 03 performs an operation corresponding to the control signal.
For example, the execution unit 03 includes a boom raising and lowering solenoid valve, a walking solenoid valve, and the like; the bearing monitoring device 02 is respectively electrically connected with the boom lifting electromagnetic valve and the walking electromagnetic valve; and when the judgment result is that the operation platform is overloaded, the bearing monitoring device 02 generates a lifting stop control signal and a walking stop control signal, and sends the lifting stop control signal and the walking stop control signal to the boom lifting electromagnetic valve and the walking electromagnetic valve respectively.
The bearing monitoring device 02 is electrically connected with an alarm device, which can be a buzzer, an indicator light, etc. And the bearing monitoring device 02 sends an alarm signal to the alarm device when the judgment result is that the operation platform is overloaded, and the alarm device carries out alarm processing based on the alarm signal.
The human-computer interaction unit 04 can be a notebook computer, a vehicle-mounted computer, a handheld terminal and the like. The bearing monitoring device 02 is electrically connected with the human-computer interaction unit 04, receives the calibration instruction sent by the human-computer interaction unit 04 and performs calibration processing, and the calibration instruction can be a weighing function calibration instruction and the like. The load-bearing monitoring device 02 sends the platform load capacity and the fault reminding information corresponding to the stress signal to the human-computer interaction unit 04.
The signal processing module 05 is electrically connected to the pin sensor 01 and the load-bearing monitoring device 02, and is configured to perform corresponding processing, such as filtering, amplification, and conversion, on the stress signal sent by the pin sensor 01. The signal processing module 05 sends the processed stress signal to the bearing monitoring device 02; the signal processing module 05 is electrically connected with the bearing monitoring device 02 through a bus and the like, and the bus comprises a CAN bus, an R485 bus and the like.
The load-bearing monitoring device 02 calculates the load capacity of the work platform according to the corresponding relationship between the load capacity of the work platform and the stress signal. The load-bearing monitoring device 02 determines whether the load capacity of the work platform exceeds the product of the rated load capacity of the platform and the proportional threshold, and if so, determines that the work platform is overloaded. The proportional threshold may be 110%, 120%, etc., for example, if the work platform payload is determined to exceed the product of the platform rated payload and 110%, the work platform is determined to be overloaded.
In one embodiment, as shown in fig. 3, the signal input part includes four strain gauge pin sensors S1, S2, S3, S4 and a signal processing module L1. The four strain type pin shaft sensors replace four pin shafts at the hinged position of the operation platform and the arm support. The signal processing module amplifies and converts signals of the strain type pin shaft sensor, and transmits a bearing monitoring device through a CAN bus communication mode, wherein the bearing monitoring device CAN comprise an Electronic Control Unit (ECU), and an EUC (universal serial bus) is used as a controller and is used for executing signal processing and safety logic control.
And the ECU acquires the sensor signals and then performs logic processing to establish the corresponding relation between the load capacity of the operation platform and the stress signals of the four pin shaft sensors. If the load of the operation platform exceeds 110% of the rated load capacity of the platform, the ECU executes the equipment restraint, and cuts off the output of the boom lifting electromagnetic valve and the walking electromagnetic valve. And the ECU controls the buzzer to give an audible and visual alarm. The man-machine interaction unit finishes the calibration of the weighing function, and has the functions of real-time display of platform load capacity, fault code reminding and the like.
In one embodiment, the weight monitoring device 02 acquires four first stress signals corresponding to four pin-type sensors when the work platform is empty, and sets the sum of the values of the four first stress signals to a zero weight reference. When the rated load is placed at the position of the calibration counterweight on the operation platform, the load-bearing monitoring device 02 acquires four second stress signals corresponding to the four pin shaft sensors, and sets the sum of the values of the four second stress signals as the rated load corresponding to the rated load.
The load-bearing monitoring device 02 sets a corresponding relationship according to the rated load, the sum of the numerical values of the four first stress signals, the sum of the numerical values of the four second stress signals and the sum of the numerical values of the four third stress signals; and when carrying out load monitoring, four third stress signals corresponding to the four pin shaft type sensors are acquired.
The corresponding relation is as follows:
M＝Mforehead (forehead)/(SForehead (forehead)-SAir conditioner)*(STime of flight-SAir conditioner)(1-1)；
Wherein M isForehead (forehead)Is the weight of the rated load, SForehead (forehead)Is the sum of the values of the four second stress signals, SAir conditionerIs the sum of the values of the four first stress signals, STime of flightIs the sum of the values of the four third stress signals.
In one embodiment, when the stress is measured through four pin positions and the load is calibrated, centering calibration is needed. As shown in FIG. 4, the nominal load is placed at the position of the calibration counterweight on the work platform, so that errors of the load at different positions of the platform caused by uneven stress distribution can be effectively counteracted.
Firstly, in the no-load state of a platform, an ECU of a load-bearing monitoring device records the numerical values of stress signals generated by four strain type pin shaft sensors S1, S2, S3 and S4, and the sum of the numerical values is SAir conditioner(ii) a The value of the stress signal is a value generated by the strain gauge pin sensor and is used for representing the measured stress magnitude, for example, the value of the stress signal is 30, 40, and the like. By means of a displayAir conditionerThe corresponding amount is designated as 0kg, which is a zero weight basis. Will be rated load MForehead (forehead)The stress signals generated by four strain type pin sensors S1, S2, S3 and S4 are recorded and summed to be S2Forehead (forehead)By means of a display, will SForehead (forehead)Is marked as MForehead (forehead)The corresponding quantity is the corresponding quantity of the rated load. The sum of the numerical values of real-time stress signals measured by four strain type pin shaft sensors is STime of flightIf the real-time load M of the corresponding platform is equal to MForehead (forehead)/(SForehead (forehead)-SAir conditioner)*(STime of flight-SAir conditioner)。
The load-bearing monitoring device 02 acquires a signal numerical range of the pin sensor, judges whether the numerical value of the stress signal is in the signal numerical range, and determines that the pin sensor fails if the numerical value of the stress signal is not in the signal numerical range. According to the measuring range of the strain pin sensor, the upper limit and the lower limit of a normal signal value can be confirmed, the lower limit is a, the upper limit is b, and the normal value of a stress signal is between a and b. And if the value of the stress signal generated by the pin shaft sensor read by the ECU is not in the range, judging that the sensor is in failure.
In the aerial work platform truck in the embodiment, the work platform is hinged with the scissor type arm support through the pin shaft type sensor, the pin shaft type sensor is used for measuring the strain force at the hinged part of the work platform and the scissor type arm support, and whether the bearing weight of the work platform is overloaded or not is judged according to the corresponding relation between the preset work platform load capacity and the strain signal based on the strain signal, so that the functions of real-time monitoring of the load state of the scissor type aerial work platform and limitation of overload actions are realized; by converting the platform load into the strain force of the pin shaft position, the error caused by the arm support angle and the feedback weight of the pressure side surface of the oil cylinder is avoided, meanwhile, the weighing precision error caused by the influence of the environmental temperature on the pressure can be effectively avoided, and the measuring result is more accurate and reliable; can satisfy when the platform operation, carry out real time monitoring to whole car platform loading capacity, prevent to cause the whole car to tumble because of overloading, cause the incident, the security is better.
The method and system of the present invention may be implemented in a number of ways. For example, the methods and systems of the present invention may be implemented by software, hardware, firmware, or any combination of software, hardware, and firmware. The above-described order for the steps of the method is for illustrative purposes only, and the steps of the method of the present invention are not limited to the order specifically described above unless specifically stated otherwise. Furthermore, in some embodiments, the present invention may also be embodied as programs recorded in a recording medium, the programs including machine readable instructions for implementing a method according to the present invention. Thus, the present invention also covers a recording medium storing a program for executing the method according to the present invention.
The description of the present invention has been presented for purposes of illustration and description, and is not intended to be exhaustive or limited to the invention in the form disclosed. Many modifications and variations will be apparent to practitioners skilled in this art. The embodiment was chosen and described in order to best explain the principles of the invention and the practical application, and to enable others of ordinary skill in the art to understand the invention for various embodiments with various modifications as are suited to the particular use contemplated.
Claims (7)
1. An aerial work platform truck, comprising:
the device comprises an operation platform, a scissor-type arm support, a pin shaft type sensor and a bearing monitoring device; the operation platform is hinged with the scissor type arm support through the pin shaft type sensor, and the pin shaft type sensor is used for measuring the strain force at the hinged position of the operation platform and the scissor type arm support and generating a stress signal;
and the bearing monitoring device is electrically connected with the pin shaft type sensor, acquires the stress signal, judges whether the bearing weight of the operation platform is overloaded or not according to the corresponding relation between the preset load weight of the operation platform and the stress signal, and executes corresponding operation based on the judgment result.
2. The aerial platform trolley of claim 1 further comprising: an execution unit;
and the bearing monitoring device is connected with the execution unit and used for generating a control signal and sending the control signal to the execution unit when the judgment result is that the operation platform is overloaded, so that the execution unit executes the operation corresponding to the control signal.
3. The aerial work platform cart of claim 2, wherein the execution unit comprises: a boom lifting electromagnetic valve and a walking electromagnetic valve;
the bearing monitoring device is respectively electrically connected with the boom lifting electromagnetic valve and the walking electromagnetic valve, and is used for generating a lifting stop control signal and a walking stop control signal under the condition that the judgment result is that the operation platform is overloaded, and respectively sending the lifting stop control signal and the walking stop control signal to the boom lifting electromagnetic valve and the walking electromagnetic valve.
4. The aerial platform trolley of claim 1 further comprising: an alarm device;
and the bearing monitoring device is electrically connected with the alarm device and is used for sending an alarm signal to the alarm device when the judgment result is that the operation platform is overloaded.
5. The aerial platform trolley of claim 1 further comprising: a human-computer interaction unit;
and the bearing monitoring device is electrically connected with the human-computer interaction unit and is used for receiving the calibration instruction sent by the human-computer interaction unit and sending the platform load capacity and the fault reminding information corresponding to the stress signal to the human-computer interaction unit.
6. The aerial platform trolley of claim 1 further comprising: a signal processing module;
the signal processing module is respectively electrically connected with the pin shaft type sensor and the bearing monitoring device, and is used for correspondingly processing the stress signal sent by the pin shaft type sensor and sending the processed stress signal to the bearing monitoring device;
wherein, signal processing module passes through the bus with the bearing monitoring device electricity is connected, the bus includes: a CAN bus.
7. The aerial work platform cart of claim 1,
the number of the pin shaft type sensors is four, and the four pin shaft type sensors are respectively positioned at four corners of the bottom of the operation platform.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021780528.2U CN213112435U (en) | 2020-08-24 | 2020-08-24 | Aerial working platform truck |
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| CN202021780528.2U CN213112435U (en) | 2020-08-24 | 2020-08-24 | Aerial working platform truck |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115196562A (en) * | 2022-06-08 | 2022-10-18 | 湖南中联重科智能高空作业机械有限公司 | Wheel bearing reaction force detection device, system and aerial work platform |
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2020
- 2020-08-24 CN CN202021780528.2U patent/CN213112435U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115196562A (en) * | 2022-06-08 | 2022-10-18 | 湖南中联重科智能高空作业机械有限公司 | Wheel bearing reaction force detection device, system and aerial work platform |
| CN115196562B (en) * | 2022-06-08 | 2023-04-28 | 湖南中联重科智能高空作业机械有限公司 | Wheel support counter force detection device, system and aerial work platform |
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