Vehicle ladder action warning system and engineering machinery
By adding a delay control function to the ladder control circuit and installing a laser projection device on the vehicle body, the problem of insufficient reaction time caused by the synchronous operation button of the ladder and the acousto-optical alarm in the prior art is solved, and higher safety and accurate position indication are achieved.
Patent Information
- Application Number
- CN202421969899.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-14
- Publication Date
- 2025-06-03
- Estimated Expiration
- 2034-08-14
AI Technical Summary
The existing ladder action buttons work in synchronization with the acousto-light alarm, resulting in insufficient reaction time for people close to the ladder, and lack of reference objects before the ladder is placed, which affects the accurate judgment of the position range after the ladder is placed.
The delay control function is added to the ladder control circuit, so that the ladder movement has an active lag relative to the warning device movement, providing sufficient reaction time, and installing a laser projection device on the vehicle body to form a light warning area to assist in determining the position of the ladder after it is laid down.
Through the delay control function, the reaction time of personnel before the ladder is operated is improved and safety is enhanced; the laser projection device provides accurate position indication, which improves the safety warning effect of ladder operation and ground personnel.
Smart Images
Figure CN222936081U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a warning system for the action of a boarding ladder, belonging to the technical field of construction machinery. Background Art
[0002] The cab of a large excavator is at a relatively high position and is generally equipped with boarding ladders such as flip-up type, folding type, telescopic type, etc. for assisting the driver to get on and off the vehicle. During the retraction and extension process of the boarding ladder, the safety of surrounding personnel needs to be ensured. Currently, a sound and light alarm is often used to give safety warnings to surrounding personnel. Its control form is generally that when the boarding ladder action button is operated, the boarding ladder will act immediately. When the boarding ladder action button or the position sensor does not receive the specified status signal, the sound and light alarm works.
[0003] Problems existing in the prior art: 1. When the boarding ladder action button is operated, the boarding ladder and the sound and light alarm work simultaneously, and there is not enough reaction time for the personnel approaching the boarding ladder; 2. Before the boarding ladder is lowered, the operator can only rely on experience to judge the relative position between the structure of the boarding ladder and the ground objects after the boarding ladder is lowered.
[0004] Reasons for the above technical problems: 1. During the retraction and extension process of the boarding ladder, the sound and light alarm works synchronously with the boarding ladder. When the on-site ground personnel hear or observe the warning signal, the boarding ladder has already started to move, which poses a safety hazard; 2. Before the boarding ladder is lowered, there is no reference object on the ground to assist the boarding ladder operator or the ground personnel to accurately judge the position range after the boarding ladder is lowered. Summary of the Invention
[0005] In view of the above problems, the utility model provides a warning system for the action of a boarding ladder. By adding a time-delay control function to the existing control circuit, the active lag of the boarding ladder action relative to the warning device action is realized, giving sufficient reaction time to the personnel near the boarding ladder position and improving safety.
[0006] The utility model is implemented according to the following technical solutions:
[0007] In a first aspect, the utility model provides a warning system for the action of a boarding ladder, including:
[0008] A boarding ladder, assembled on the vehicle body;
[0009] An electric control system, used to control the retraction and extension actions of the boarding ladder;
[0010] A warning device, assembled on the vehicle body near the boarding ladder and electrically connected to the electric control system, used to give safety warnings to personnel when the boarding ladder action is operated;
[0011] A delay control component, installed in the electric control system, is used to delay the operation of the boarding ladder, so that when personnel operate the boarding ladder to retract and lower it through the electric control system, the operation of the boarding ladder lags behind the operation of the warning device.
[0012] In some embodiments, the electric control system includes:
[0013] A controller, which has data processing functions;
[0014] A ladder electronic pump, connected to the output end of the controller;
[0015] A ladder up switch and a ladder down switch, respectively connected to the input end of the controller. After personnel continuously press the ladder up switch or the ladder down switch, an up ladder or down ladder signal is input to the controller.
[0016] A ladder up solenoid valve and a ladder down solenoid valve, respectively connected to the output end of the controller, and cooperate with the ladder electronic pump to realize the retraction and lowering actions of the boarding ladder.
[0017] In some embodiments, the delay control component is a time delay relay. Its control coil is connected to the controller, and its normally open contact is connected in series in the power supply line of the ladder electronic pump. When the controller receives a switch signal, the time delay relay delays for a preset time and then its normally open contact closes to conduct the power supply of the ladder electronic pump, thereby starting the ladder electronic pump.
[0018] In some embodiments, the electric control system further includes:
[0019] A ladder upper limit sensor, connected to the input end of the controller, and is used to transmit the detected signal that the boarding ladder is retracted in place to the controller;
[0020] A ladder lower limit sensor, connected to the input end of the controller, and is used to transmit the detected signal that the boarding ladder is lowered in place to the controller.
[0021] In some embodiments, the electric control system further includes:
[0022] An emergency stop switch, including a normally open switch and a normally closed switch. The normally open switch is connected to the input end of the controller, and the normally closed switch is connected in the power supply lines of the ladder up switch and the ladder down switch. After personnel press the emergency stop switch, the normally open switch closes and the normally closed switch opens, thereby stopping any action of the boarding ladder.
[0023] In some embodiments, the warning device includes an audible and visual alarm with sound and flashing warning functions, which is connected to the output end of the controller in the electric control system through a relay.
[0024] In some embodiments, the warning device includes a laser projection device, which is composed of a plurality of laser projectors, assembled on the vehicle body near the boarding ladder, and connected to the output end of the controller in the electronic control system through a relay, and is used to project light on the ground near the boarding ladder to form a light warning area.
[0025] In some embodiments, a manual switch is also connected in parallel in the power supply circuit of the laser projection device. When the vehicle is moving or working, personnel can turn on the laser projection device through the manual switch.
[0026] In some embodiments, a camera is installed on the vehicle body above the boarding ladder, which can monitor the boarding ladder and the ground light warning area in real time, and assist the driver to judge the area position after the boarding ladder is lowered in advance.
[0027] In a second aspect, the present invention provides a construction machinery equipped with the above-mentioned ladder movement warning system.
[0028] Compared with the prior art, the beneficial effects of the present invention are as follows:
[0029] The present invention provides a ladder movement warning system. By adding a delay control function to the existing control circuit, the active lag of the ladder movement relative to the warning device movement is realized, giving sufficient reaction time to the personnel near the ladder position, improving safety; and a laser projection device is added to the vehicle body, which can project light on the ground to form a danger warning area, providing accurate position indication for the personnel operating the ladder or driving the vehicle, and adding safety warning for the ground personnel. BRIEF DESCRIPTION OF THE DRAWINGS
[0030] The drawings, as a part of the present invention, are used to provide a further understanding of the present invention. The schematic embodiments and descriptions of the present invention are used to explain the present invention, but do not constitute an improper limitation of the present invention. Obviously, the drawings in the following description are only some embodiments, and those of ordinary skill in the art can obtain other drawings based on these drawings without creative efforts.
[0031] In the drawings:
[0032] Figure 1 is a schematic diagram of the assembly and application of the ladder movement sound and light warning system of the present invention Figure 1 ;
[0033] Figure 2 is a schematic diagram of the assembly and application of the ladder movement sound and light warning system of the present invention Figure 2 ;
[0034] Figure 3 is the schematic diagram of the control circuit principle of the ladder movement sound and light warning system of the present invention.
[0035] Attached drawing reference signs: 1 - vehicle body; 2 - boarding ladder; 3 - warning device; 3 - 1, audible and visual alarm; 3 - 1 - 1, buzzer; 3 - 1 - 2, flashing light; 3 - 2, laser projection device; 3 - 2 - 1, first laser projector; 3 - 2 - 2, second laser projector; 4, camera; 5, light warning area.
[0036] It should be noted that these attached drawings and text descriptions are not intended to limit the scope of the concept of the present utility model in any way, but to illustrate the concept of the present utility model to those skilled in the art by referring to specific embodiments. Detailed implementation manners
[0037] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the attached drawings in the embodiments of the present utility model. The following embodiments are used to illustrate the present utility model, but are not used to limit the scope of the present utility model.
[0038] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", etc. is based on the orientation or positional relationship shown in the attached drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model.
[0039] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", "connected" should be understood in a broad sense. For example, it 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 directly connected, or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.
[0040] As Figure 1 shown, a vehicle ladder movement warning system includes a boarding ladder 2, an electric control system, a warning device 3 and a delay control component; the boarding ladder 2 is assembled on the vehicle body 1; the electric control system is used to control the boarding ladder 2 to perform the retracting and lowering actions; the warning device 3 is assembled on the vehicle body 1 close to the boarding ladder 2 and is electrically connected to the electric control system, and is used to give a safety warning to personnel when operating the boarding ladder 2; the delay control component is installed in the electric control system and is used to delay the movement of the boarding ladder 2, so that when the personnel operate the boarding ladder 2 to perform the retracting and lowering actions through the electric control system, the movement of the boarding ladder 2 lags behind the movement of the warning device 3.
[0041] The above-mentioned electric control system will be further described below.
[0042] As Figure 3 shown, the electric control system includes a controller, a vehicle ladder electronic pump, a ladder up switch, a ladder down switch, a ladder up solenoid valve, and a ladder down solenoid valve; the controller has a data processing function; the vehicle ladder electronic pump is connected to the output end of the controller; the ladder up switch and the ladder down switch are respectively connected to the input end of the controller, and when a person continuously presses the ladder up switch or the ladder down switch, a ladder up or down signal is input to the controller; the ladder up solenoid valve and the ladder down solenoid valve are respectively connected to the output end of the controller, and cooperate with the vehicle ladder electronic pump to realize the retraction and lowering actions of the boarding ladder.
[0043] A further solution is that, as Figure 3 shown, the delay control component is a time delay relay, its control coil is connected to the controller, and its normally open contact is connected in series in the power supply line of the vehicle ladder electronic pump. When the controller receives the switch signal, the time delay relay delays for a preset time and then its normally open contact closes to conduct the power supply of the vehicle ladder electronic pump, thereby starting the vehicle ladder electronic pump.
[0044] The specific working process is as follows: when a person operates the vehicle ladder for retraction and lowering actions, the movement of the boarding ladder 2 lags behind the movement of the warning device 3, that is, within the time "T" when a person operates the vehicle ladder action button, the warning device 3 works but the boarding ladder 2 does not move. When the person keeps operating the vehicle ladder action button for more than the time "T", the warning device 3 keeps operating and the boarding ladder 2 starts to move. The time "T" is the set lag time of the boarding ladder 2 relative to the warning device 3, which can be controlled by the time delay relay to give sufficient reaction time to the people near the vehicle ladder.
[0045] A further solution is that, as Figure 3 shown, the electric control system further includes a ladder upper limit sensor and a ladder lower limit sensor; the ladder upper limit sensor is connected to the input end of the controller and is used to transmit the detected signal indicating that the boarding ladder is retracted in place to the controller; the ladder lower limit sensor is connected to the input end of the controller and is used to transmit the detected signal indicating that the boarding ladder is lowered in place to the controller.
[0046] A further solution is that, as Figure 3 shown, the electric control system further includes an emergency stop switch, including a normally open switch and a normally closed switch. The normally open switch is connected to the input end of the controller, and the normally closed switch is connected in the power supply line of the ladder up switch and the ladder down switch. When a person presses the emergency stop switch, the normally open switch closes and the normally closed switch opens, thereby stopping the boarding ladder from performing any action.
[0047] The above-mentioned warning device will be further described below.
[0048] As Figure 2 、Figure 3 As shown, the warning device 3 includes an audible and visual alarm 3-1 with the functions of sound and flash warning. The audible and visual alarm 3-1 includes electrical components such as a buzzer 3-1-1 and a stroboscopic lamp 3-1-2 that have the functions of sound or flash warning. The audible and visual alarm 3-1 is connected to the output end of the controller in the electric control system through a relay.
[0049] A further solution is as Figure 2 As shown, the warning device 3 further includes a laser projection device 3-2. The laser projection device 3-2 is composed of several laser projectors, assembled on the vehicle body 1 near the boarding ladder 2, and connected to the output end of the controller in the electric control system through a relay, for projecting light on the ground near the boarding ladder 2 to form a light warning area 5. The light warning area 5 is the projection area of its structure on the ground during or after the boarding ladder 2 falls.
[0050] A preferred solution is as Figure 2 As shown, the laser projection device 3-2 includes a first laser projector 3-2-1 and a second laser projector 3-2-2. When in use, the first laser projector 3-2-1 projects light onto the ground to form a light warning area 5. When the boarding ladder 2 is lowered and blocks the light, the second laser projector 3-2-2 can supplement the boundary light of the light warning area 5.
[0051] A further solution is that a manual switch is also connected in parallel in the power supply circuit of the laser projection device 3-2. When the vehicle is moving or working, personnel can turn on the laser projection device 3-2 through the manual switch.
[0052] A further solution is as Figure 2 As shown, a camera 4 is installed on the vehicle body above the boarding ladder 2, which can monitor the boarding ladder 2 and the ground light warning area 5 in real time, assisting the driver to judge the area position after the boarding ladder 2 is lowered in advance.
[0053] The following gives the specific working process of the above-mentioned ladder movement warning system:
[0054] As Figure 3 As shown, the following electrical components are given in the figure: a storage battery G1, fuses F01-F05, a controller ECU, an emergency stop switch S1, a ladder up switch S2, a ladder down switch S3, a ladder upper limit sensor SQ1, a ladder lower limit sensor SQ2, a ladder up solenoid valve YK1, a ladder down solenoid valve YK2, an audible and visual alarm relay K1, a laser projection relay K2, a time delay relay K3, a buzzer B1, a stroboscopic lamp E1, a laser projection device E2, and a ladder electronic pump M1.
[0055] During use, the operator presses the ladder up switch S2 or the ladder down switch S3. After receiving the operation instruction, the controller ECU first judges the signals of the upper limit sensor SQ1 of the ladder, the lower limit sensor SQ2 of the ladder, and the emergency stop switch S1. After judging that the operation instruction signal is executable, the controller ECU starts to output signals to trigger the action of the sound and light alarm relay K1 or its combined action with the laser projection relay K2 to complete the sound and light warning before the ladder moves. If the ladder lifting and lowering operation instruction continues and exceeds the action lag setting time "T" of the boarding ladder relative to the warning device (this time is determined by the time delay relay K3), then while the warning device is operating, the normally open contact of the time delay relay K3 closes to turn on the ladder electronic pump M1, and the controller ECU outputs the corresponding solenoid valve signal to realize the ladder movement. During this process, if the operator's operation instruction is interrupted, the operation of the warning device and the ladder movement will be terminated. When the ladder lifting and lowering switch is operated again, the above actions are repeated.
[0056] The control circuit of the laser projection device E2 is independent of the ladder movement control circuit and can be independently controlled by the driver through a switch. In addition to being used in the ladder movement scenario, it can also be actively turned on by the driver during the vehicle's movement or rotation to project a light warning area on the ground. A camera is installed on the vehicle body to be able to monitor the ladder and the ground light warning area in real time, assisting the driver to judge the area position after the ladder is lowered in advance.
[0057] In summary, the present utility model provides a ladder movement warning system. By adding a time delay control function to the existing control circuit, it realizes the active lag of the ladder movement relative to the warning device action, giving sufficient reaction time to the personnel near the ladder position and improving safety; and a laser projection device is added to the vehicle body, which can project light on the ground to form a dangerous warning area, providing accurate position indication for the personnel operating the ladder or driving the vehicle and adding safety warning for the ground personnel.
[0058] The construction machinery provided by the present utility model will be described below. The construction machinery described below can be mutually corresponding and referred to the ladder movement warning system described above.
[0059] A construction machinery provided by the present utility model may include the ladder movement warning system described in any one of the above embodiments.
[0060] The beneficial effects achieved by the construction machinery provided by the present utility model are the same as those achieved by the ladder movement warning system provided by the present utility model, so they will not be elaborated here.
[0061] It should be noted that the above construction machinery can be an excavator. The excavator includes a power device, a traveling device, a slewing device, and a working device.
[0062] The power unit of an excavator generally uses a diesel engine, which is fixed on the slewing platform through a vibration damping device to provide power for its traveling device, slewing device, working device, etc.
[0063] The traveling device of the excavator supports the total mass of the excavator and completes the traveling task, and mostly adopts crawler type and tire type.
[0064] The slewing device of the excavator enables the upper part of the vehicle to slewing left or right for excavation and discharging materials.
[0065] The working device of the excavator is used to directly complete the excavation task, including the boom, arm, bucket and linkage mechanism, etc.
[0066] The hydraulic system of the excavator transmits the power output by the engine to the working device and the traveling device.
[0067] The electrical system of the excavator mainly detects some temperatures, pressures, speeds and switch quantities of the engine, hydraulic pump, main valve and actuators (hydraulic cylinders, hydraulic motors) and transmits the relevant detection data to the special controller of the excavator. The controller synthesizes various measured values, set values and operation signals to send out relevant control information to control the engine, hydraulic pump, main valve and the whole machine.
[0068] In the specification provided here, a large number of specific details are described. However, it can be understood that the embodiments of the present invention can be practiced without these specific details. In some instances, well-known methods, structures and technologies are not shown in detail so as not to obscure the understanding of this specification.
[0069] In addition, those skilled in the art can understand that although some of the embodiments described herein include certain features contained in other embodiments rather than other features, the combinations of the features of different embodiments also mean that they are within the protection scope of the present invention and form different embodiments. For example, in the above embodiments, those skilled in the art can use them in a combined manner according to the known technical solutions and the technical problems to be solved by this application.
[0070] The above are only the preferred embodiments of the present invention, and do not impose any form of limitation on the present invention. Although the present invention has been disclosed above with the preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art of this patent, without departing from the scope of the technical solution of the present invention, can make some changes or modifications to the above-mentioned technical content as equivalent embodiments of equivalent changes. However, as long as it does not depart from the content of the technical solution of the present invention, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention still fall within the scope of the technical solution of the present invention.
Claims
1. A vehicle ladder motion warning system, characterized in that: include: The boarding ladder is mounted on the vehicle body; An electric control system, used for controlling the staircase to perform folding and lowering actions; A warning device, mounted on a vehicle body near the boarding ladder and electrically connected to the electronic control system, for providing safety warnings to personnel when operating the boarding ladder; A delay control component is installed in the electric control system and is used to delay the action of the boarding ladder so that when a person operates the boarding ladder through the electric control system to fold and lower the boarding ladder, the action of the boarding ladder has a lag relative to the action of the warning device.
2. A vehicle ladder motion warning system according to claim 1, characterized in that: The electronic control system comprises: A controller, which has data processing capabilities; A vehicle ladder electronic pump connected to the output end of the controller; The ladder up switch and the ladder down switch are respectively connected to the input end of the controller. When a person continuously presses the ladder up switch or the ladder down switch, a ladder up or ladder down signal is input to the controller. The ladder raising solenoid valve and the ladder lowering solenoid valve are respectively connected to the output end of the controller, and cooperate with the vehicle ladder electronic pump to realize the folding and lowering actions of the vehicle ladder.
3. A vehicle ladder motion warning system according to claim 2, characterized in that: The delay control component is a time delay relay, whose control coil is connected to the controller, and whose normally open contacts are connected in series in the power supply circuit of the vehicle elevator electronic pump. When the controller receives a switch signal, the time delay relay delays for a preset time and its normally open contacts close to turn on the power supply of the vehicle elevator electronic pump, thereby starting the vehicle elevator electronic pump.
4. A vehicle ladder motion warning system according to claim 2, characterized in that: The electronic control system further comprises: A ladder upper limit sensor is connected to the input end of the controller and is used to transmit a signal of detecting that the boarding ladder is retracted to the controller; The ladder lower limit sensor is connected to the input end of the controller and is used to transmit a signal of detecting that the boarding ladder is lowered into place to the controller.
5. A vehicle ladder motion warning system according to claim 2, characterized in that: The electronic control system further comprises: The emergency stop switch includes a normally open switch and a normally closed switch. The normally open switch is connected to the input end of the controller, and the normally closed switch is connected to the power supply circuit of the ladder up switch and the ladder down switch. After the person presses the emergency stop switch, the normally open switch is closed and the normally closed switch is opened, thereby stopping the boarding ladder from performing any action.
6. A vehicle ladder motion warning system according to claim 1, characterized in that: The warning device comprises an acousto-optic alarm with sound and flash warning functions, which is connected to the output end of the controller in the electric control system through a relay.
7. A vehicle ladder motion warning system according to claim 1 or 6, characterized in that: The warning device includes a laser projection device, which is composed of a plurality of laser projectors, mounted on a vehicle body located near the boarding ladder, and connected to the output end of a controller in the electronic control system through a relay, and is used to project light on the ground near the boarding ladder to form a light warning area.
8. A vehicle ladder motion warning system according to claim 7, characterized in that: A manual switch is also connected in parallel to the power supply circuit of the laser projection device. When the vehicle is moving or working, a person turns on the laser projection device through the manual switch.
9. The vehicle ladder motion warning system according to claim 7, characterized in that: A camera is installed on the vehicle body above the boarding ladder, which can monitor the boarding ladder and the ground light warning area in real time, and assist the driver to judge the area position after the boarding ladder is lowered in advance.
10. An engineering machine, characterized in that: A vehicle ladder motion warning system as described in any one of claims 1 to 9 is installed.