Safety limiting device for boxcar
By installing limit switches and photoelectric beam switches on the truck to detect the status of the cargo box, and controlling the drive unit with the controller, the problem of the driver starting the vehicle before safely lowering the cargo box is solved, thus improving the safety and automation of the truck unloading process.
Patent Information
- Application Number
- CN202520453259.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-15
- Publication Date
- 2025-12-30
- Estimated Expiration
- 2035-03-15
AI Technical Summary
During the transportation of materials in cement plants, drivers start the vehicle before the cargo box is safely lowered, lacking an effective detection mechanism, which leads to significant safety hazards and may cause the cargo box to fall off or threaten surrounding personnel and equipment.
Limit switches and photoelectric beam switches are used to detect the descent of the cargo box and the presence of materials. The controller controls the operation of the drive unit to ensure that the vehicle is not allowed to start until the cargo box is completely lowered.
It improves the safety and automation of truck operation, avoids the dangerous situation of starting the vehicle before the cargo box is lowered, and enhances the safety of the unloading process.
Smart Images
Figure CN223735846U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of truck technology, specifically relating to a truck compartment safety limit device. Background Technology
[0002] In the material transportation process at cement plants, trucks bear a heavy transportation burden as the main means of transport. However, the safety hazards caused by improper operation by drivers during the material unloading process have always been a problem that urgently needs to be solved. It is easy for drivers to start the vehicle before the cargo box is safely lowered. At the unloading site, due to the complexity of personnel and the large number of equipment, if the driver starts the vehicle directly before the cargo box is fully lowered, the lack of an effective detection mechanism makes it difficult to detect and stop this dangerous behavior in time. This may not only lead to the cargo box falling off or being damaged, but also pose a serious threat to surrounding personnel and equipment, resulting in a great safety risk. Utility Model Content
[0003] To address the above problems, the purpose of this utility model is to provide a truck cargo compartment safety limit device to solve the problem mentioned in the background art where drivers tend to start the vehicle before the cargo compartment is safely lowered.
[0004] This utility model provides a truck cargo box safety limit device, including a cargo box for loading materials, a chassis for lifting and lowering the cargo box via a hydraulic system, and a drive device for driving the truck. It also includes a limit switch mounted on the chassis for detecting whether the cargo box has lowered, a photoelectric beam switch mounted at the rear end of the cargo box for detecting whether there is material inside the cargo box, and a controller. The signal output terminals of the limit switch and the photoelectric beam switch are both connected to the signal input terminal of the controller. The output terminal of the controller is used to output a control signal to control the operation of the drive device.
[0005] Preferably, the photoelectric beam switch includes a transmitter and a receiver mounted opposite each other on the cargo box, and the controller determines whether there is material in the cargo box based on whether the receiver receives the light signal emitted by the transmitter.
[0006] Preferably, when the receiver of the photoelectric beam switch does not receive the light signal emitted by the transmitter, it indicates that there is material in the cargo box, and at this time the controller can control the operation of the drive device.
[0007] Preferably, when the receiver of the photoelectric beam switch receives the light signal emitted by the transmitter that passes through the inside of the cargo box, that is, when there is no material in the cargo box and the limit switch detects that the cargo box has fallen onto the chassis, the controller can control the operation of the drive device.
[0008] Preferably, the chassis has a groove for installing a limit switch. When the cargo box is completely placed on the chassis, it will contact the limit switch, and the switch will send a signal indicating that the cargo box has been completely placed.
[0009] Preferably, the side wall of the cargo box has a second groove for installing a photoelectric beam switch, and a transparent protective cover is installed on the outside of the second groove.
[0010] The beneficial effects of this utility model are as follows: This utility model is equipped with a limit switch for detecting the lowering state of the cargo box and a photoelectric beam switch for detecting whether there is material in the cargo box. The two sets of switches are connected in series with the vehicle's starting device. When the photoelectric beam switch is blocked by an obstruction, it proves that there is material in the cargo box, and the vehicle can be started to move back and forth to unload the material. When the photoelectric beam switch is unobstructed, it proves that there is no material in the vehicle. At this time, the vehicle can only be started when the limit switch on the chassis receives the sensing signal of the cargo box being lowered. This improves the safety and automation of truck operation. Attached Figure Description
[0011] Figure 1 This is a schematic diagram of the structure of this utility model;
[0012] Figure 2 This is a first cross-sectional view of the present invention.
[0013] Figure 3 This is a second cross-sectional view of the present invention.
[0014] Figure 4 This is a schematic diagram of the circuit principle structure of this utility model.
[0015] In the diagram: 1. Cargo box; 2. Hydraulic system; 3. Chassis; 4. Limit switch; 5. Photoelectric beam switch; 6. Controller; 7. Transmitter; 8. Receiver; 9. Groove 1; 10. Groove 2; 11. Transparent protective cover; 12. Drive unit. Detailed Implementation
[0016] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be described in detail below with reference to the accompanying drawings. The description in this part is only exemplary and explanatory, and should not be used to limit the scope of protection of this utility model in any way.
[0017] This utility model relates to a conventional truck cargo box safety limiting device, which mainly includes a cargo box 1 for loading materials, a chassis 3 that drives the cargo box 1 to lift and lower via a hydraulic system 2, and a drive device 12 for driving the truck. During unloading, the vehicle stops driving, and the cargo box 1 is lifted by the hydraulic system 2 to unload the materials. After the materials are unloaded, the cargo box 1 is lowered by the hydraulic system 2 and completely placed on the chassis 3, so that the truck can be driven away from the unloading site. The above is an introduction to a conventional truck cargo box safety limiting device.
[0018] As can be seen from the above, the existing truck cargo box safety limit device has the following defects when in use. During the material unloading process, it is easy for the driver to start the vehicle before the cargo box 1 is safely lowered. At the unloading site, due to the complexity of personnel and the large number of equipment, if the driver starts the vehicle directly before the cargo box 1 is fully lowered, due to the lack of an effective detection mechanism, this dangerous behavior is often difficult to detect and stop in time. This may not only cause the cargo box 1 to fall off or be damaged, but may also pose a serious threat to surrounding personnel and equipment, resulting in a great safety risk. Based on the above problems, this utility model adopts the following improvement method to solve them.
[0019] like Figure 1-4 As shown, a truck cargo box safety limit device includes a cargo box 1 for loading materials, a chassis 3 that drives the cargo box 1 to lift and lower via a hydraulic system 2, and a drive unit 12 for driving the truck. It also includes a limit switch 4 mounted on the chassis 3 to detect whether the cargo box 1 has lowered, a photoelectric beam switch 5 mounted at the rear end of the cargo box 1 to detect whether there is material inside the cargo box 1, and a controller 6. The signal output terminals of the limit switch 4 and the photoelectric beam switch 5 are both connected to the signal input terminal of the controller 6. The output terminal of the controller 6 is used to output a control signal to control the operation of the drive unit 12. When the photoelectric beam switch 5 is obstructed, it indicates that there is material in the cargo box, and the vehicle can be started to allow the truck to move forward and backward to unload. When the photoelectric beam switch 5 is unobstructed, it indicates that there is no material in the truck. In this case, the vehicle can only be started if the limit switch 4 on the chassis 3 receives a sensing signal indicating that the cargo box 1 has lowered. This improves the safety and automation of truck operation.
[0020] Furthermore, such as Figure 2 As shown, the photoelectric beam switch 5 includes a transmitter 7 and a receiver 8 mounted opposite each other on the cargo box 1. The controller 6 determines whether there is material in the cargo box 1 based on whether the receiver 8 receives the light signal emitted by the transmitter 7. The transmitter 7 and the receiver 8 can be an infrared light transmitter 7 and an infrared light receiver 8. When the receiver 8 receives the infrared light emitted by the transmitter 7, it indicates that there is no material in the cargo box 1. When the receiver 8 does not receive the infrared light emitted by the transmitter 7, it indicates that there is material in the cargo box 1.
[0021] Furthermore, such as Figure 2 As shown, when the receiver 8 of the photoelectric beam switch 5 does not receive the light signal emitted by the transmitter 7, it indicates that there is material in the cargo box 1. At this time, the controller 6 can control the operation of the drive device 12 so that the truck can move back and forth to unload the material.
[0022] Furthermore, such as Figure 2-4 As shown, when the receiver 8 of the photoelectric beam switch 5 receives the light signal emitted by the transmitter 7 that passes through the interior of the cargo box 1, that is, when there is no material in the cargo box 1 and the limit switch 4 detects that the cargo box 1 has fallen onto the chassis 3, the controller 6 can control the operation of the drive unit 12. At this time, the truck can be driven safely, avoiding the dangerous situation of starting the vehicle before the cargo box 1 has fallen.
[0023] Furthermore, such as Figure 2 As shown, the chassis 3 has a groove 9 for mounting a limit switch 4. The groove 9 can be set on the frame of the chassis 3 and located at the top of the frame. When the cargo box 1 is completely lowered onto the chassis 3, it contacts the limit switch 4, and the switch will send a signal indicating that the cargo box 1 has been fully lowered. This can detect whether the cargo box 1 has been safely lowered while preventing the cargo box 1 from damaging the limit switch 4. The limit switch 4 is only one way to detect whether the cargo box 1 has been lowered. Alternatively, a proximity sensor can be installed on the chassis 3 to detect whether the bottom of the cargo box 1 or a specific position is close to the sensing area on the chassis 3. When the cargo box 1 is fully lowered, the proximity sensor will detect the cargo box 1 and send a signal indicating that the cargo box 1 has been positioned. Alternatively, photoelectric sensors (photoelectric sensors detect the presence and position of objects by emitting and receiving light signals) can be installed on both sides of the chassis 3. The transmitter 7 can be pointed at a specific position on the bottom of the cargo box 1. When the cargo box 1 is fully lowered and blocks the light signal, the photoelectric sensor will receive the signal change and send a corresponding signal indicating that the cargo box 1 has been positioned.
[0024] Furthermore, such as Figure 2 As shown, the side wall of the cargo box 1 has a groove 2 10 for installing the photoelectric beam switch 5. A transparent protective cover 11 is installed on the outside of the groove 2 10. The transparent protective cover 11 is made of infrared-transmitting glass, which can transmit infrared rays. The transparent protective cover 11 can also protect the transmitter 7 and the receiver 8. At the same time, by installing the transmitter 7 and the receiver 8 in the grooves 2 10 opened on the side walls of the cargo box 1, they can be prevented from being impacted during the cement unloading process.
Claims
1. A truck bed safety limiting device, comprising a cargo box (1) for loading materials, a chassis (3) for driving the cargo box (1) to lift and drop through a hydraulic system (2), and a driving device (12) for driving the truck to walk, characterized in that: The application also comprises a limit switch (4) installed on the chassis (3) for detecting whether the container (1) is lowered, a photoelectric opposite-acting switch (5) installed at the tail end of the container (1) for detecting whether there is material in the container (1), and a controller (6), wherein the signal output ends of the limit switch (4) and the photoelectric opposite-acting switch (5) are connected with the signal input end of the controller (6), and the output end of the controller (6) is used for outputting a control signal to control the operation of the driving device (12).
2. A truck bed safety stop device as defined in claim 1, wherein: The photoelectric opposite-acting switch (5) comprises a transmitter (7) and a receiver (8) oppositely installed on the container (1), and the controller (6) judges whether there is material in the container (1) according to whether the receiver (8) receives the light signal emitted by the transmitter (7).
3. A truck bed safety stop device as defined in claim 2, wherein: When the receiver (8) of the photoelectric opposite-acting switch (5) cannot receive the light signal emitted by the transmitter (7), it indicates that there is material in the container (1), and at this time, the controller (6) can control the operation of the driving device (12).
4. A truck bed safety stop device as defined in claim 2, wherein: When the receiver (8) of the photoelectric opposite-acting switch (5) receives the light signal emitted by the transmitter (7) and passing through the inside of the container (1), i.e. there is no material in the container (1), and the limit switch (4) detects that the container (1) has fallen on the chassis (3), the controller (6) can control the operation of the driving device (12).
5. A truck bed safety stop device as in any one of claims 1-3, wherein: The recess one (9) for installing the limit switch (4) is formed on the chassis (3), when the container (1) is completely lowered on the chassis (3), it just contacts the limit switch (4), the switch will send a signal, indicating that the container (1) has been completely lowered.
6. A truck bed safety stop device as set forth in claim 5, further comprising: The side wall of the container (1) is provided with a recess two (10) for installing the photoelectric opposite-acting switch (5), and the outer side of the recess two (10) is provided with a transparent protective cover (11).