A rear door system for low-density vehicle anti-pinch and anti-collision

Abstract

The utility model discloses a kind of rear door systems for low-density vehicle anti-pinch and anti-collision, including rear door, rear door turnover arm and rear door turnover oil cylinder, the rear door turnover arm one end is fixed with rear door, other end is hinged with carriage, the rear door turnover oil cylinder one end is hinged with rear door turnover arm, other end is hinged with rear door frame, the rear door frame is set in the rear end of carriage, it is characterized by: still including automatic controller, biosensor and distance sensor, the biosensor is set in rear door inboard lower end, and with automatic controller communication connection, the distance sensor is set in rear door outboard lower end, and with automatic controller communication connection. The utility model has the advantages that: it can avoid the situation of pinching or collision in the process of opening and closing rear door.

Description

Technical Field

[0001] This utility model relates to the field of rear door technology, specifically to a rear door system for preventing people from being pinched and collisions in low-density vehicles. Background Technology

[0002] In existing ordinary low-density vehicles, the process of opening and closing the rear door requires manual observation to check for obstacles or people entering the work space. In case of emergencies, the operating system needs to be shut down manually, which not only wastes time but may also lead to vehicle damage or personal injury due to untimely response. Utility Model Content

[0003] The purpose of this invention is to provide a rear door system for preventing people from being pinched and collisions in low-density vehicles, in order to solve the technical problems existing in the background art.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0005] A rear door system for preventing pinching and collisions in low-density vehicles includes a rear door, a rear door tilting arm, a rear door tilting cylinder, an automatic controller, a biosensor, and a distance sensor. One end of the rear door tilting arm is fixed to the rear door, and the other end is hinged to the vehicle body. One end of the rear door tilting cylinder is hinged to the rear door tilting arm, and the other end is hinged to the rear door frame. The rear door frame is located at the rear end of the vehicle body. The biosensor is located on the lower inner side of the rear door and is communicatively connected to the automatic controller. The distance sensor is located on the lower outer side of the rear door and is communicatively connected to the automatic controller.

[0006] Furthermore, it also includes a first solenoid valve, a second solenoid valve, a solenoid valve seat, an oil pump, and an oil tank. The first and second solenoid valves are both mounted on the solenoid valve seat and are respectively connected to the solenoid valve seat and the rear door tilting cylinder. The solenoid valve seat, the oil tank, and the automatic controller are all mounted on the chassis. The solenoid valve seat is respectively connected to the oil pump and the oil tank. The oil pump is mounted on the oil tank and connected to the oil tank. The first solenoid valve, the second solenoid valve, and the oil pump are also electrically connected to the automatic controller.

[0007] Furthermore, there are two rear door tilting arms and two rear door tilting cylinders, and the two rear door tilting arms and two rear door tilting cylinders are symmetrically arranged on both sides of the vehicle body. One end of each rear door tilting arm is hinged to the vehicle body, and the other end is fixed to the rear door. One end of each rear door tilting cylinder is hinged to the two rear door tilting arms, and the other end is hinged to the rear door frame. Each rear door tilting cylinder is connected to the first solenoid valve and the second solenoid valve.

[0008] Furthermore, both the first and second solenoid valves are two-position three-way solenoid valves, each having an inlet port P, a return port O, and an outlet port A. The inlet ports P of both the first and second solenoid valves are connected to the inlet channels provided on the solenoid valve seats, and the return ports O are connected to the return channels provided on the solenoid valve seats. The outlet port A of the first solenoid valve is connected to the rodless chamber of the two rear door tilting cylinders through a first hydraulic line, and the outlet port A of the second solenoid valve is connected to the rod chamber of the two rear door tilting cylinders through a second hydraulic line.

[0009] Furthermore, the solenoid valve seat has an oil inlet channel and an oil return channel. One end of the oil inlet channel is connected to the oil inlet P of the first solenoid valve and the second solenoid valve, and the other end is connected to the pump outlet of the oil pump. The pump inlet of the oil pump is connected to the oil tank. One end of the oil return channel is connected to the oil return port O of the first solenoid valve and the second solenoid valve, and the other end is connected to the oil tank through a filter.

[0010] Furthermore, the number of the biosensor and distance sensor is at least one.

[0011] Compared with the prior art, the advantages of this utility model are as follows: by installing distance sensors and biosensors on the rear door of ordinary low-density vehicles, human bodies or obstacles are detected during the opening and closing of the rear door, avoiding situations where people are trapped or collided. This provides an extra layer of safety compared to ordinary people observing, and allows for a faster response to emergencies. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in this embodiment, the accompanying drawings used in the description of the embodiment will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 This is a schematic diagram of the rear door system for preventing people from being pinched and collisions in low-density vehicles, according to an embodiment of this utility model, in the open state of the rear door.

[0014] Figure 2 This is a schematic diagram of the rear door system for preventing people from being pinched and collisions in low-density vehicles, according to an embodiment of this utility model, in the closed state of the rear door;

[0015] Figure 3 This is a partial structural schematic diagram of a rear door system for preventing people from being pinched and collisions in low-density vehicles, according to an embodiment of this utility model.

[0016] Figure 4 This is a schematic diagram of the hydraulic system of the rear door system for preventing people from being pinched and collisions in low-density vehicles, as described in this utility model embodiment, in the open state of the rear door.

[0017] Figure 5 This is a schematic diagram of the hydraulic system of the rear door system for preventing people from being pinched and collisions in low-density vehicles, as described in this utility model embodiment, in the closed state of the rear door.

[0018] Explanation of reference numerals in the attached drawings: 1. Rear door; 2. Rear door tilting arm; 3. Rear door tilting cylinder; 4. First solenoid valve; 5. Second solenoid valve; 6. Solenoid valve seat; 7. Oil pump; 8. Oil tank; 9. Automatic controller; 10. Biosensor; 11. Distance sensor; 12. Rear door frame; 13. Cargo compartment; 14. First hydraulic line; 15. Second hydraulic line; 16. Filter; 17. Rear door tilting shaft; 18. Door frame lock hook; 19. Rear door lock hook; 20. Rear door sealing skin; 21. Unloading roller. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can typically be arranged and designed in various different configurations.

[0020] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0021] In the description of the embodiments of this utility model, it should be noted that if terms such as "upper," "lower," "horizontal," or "inner" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this utility model. Furthermore, terms such as "first" and "second" are only used to distinguish descriptions and should not be construed as indicating or implying relative importance. In addition, the appearance of the term "horizontal" does not mean that the component is required to be absolutely horizontal, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but rather that it can be slightly tilted.

[0022] In the description of the embodiments of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0023] The present invention will be further described below with reference to the accompanying drawings:

[0024] See Figures 1 to 3 This utility model provides a rear door system for preventing pinching and collisions in low-density vehicles, including a rear door 1, a rear door tilting arm 2, a rear door tilting cylinder 3, an automatic controller 9, a biosensor 10, and a distance sensor 11. One end of the rear door tilting arm 2 is fixedly connected to the rear door 1, and the other end is hinged to the vehicle body 13. The rear door tilting arm 2 is used to tilt the rear door 1. One end of the rear door tilting cylinder 3 is hinged to the rear door tilting arm 2, and the other end is hinged to the rear door frame 12. The rear door tilting cylinder 3 is used to drive the rear door tilting arm 2 to tilt. The rear door 1 flips to open and close; the rear door frame 12 is located at the rear end of the carriage 13; the biosensor 10 is located on the lower inner side of the rear door 1 and is connected to the automatic controller 9. The biosensor 10 is used to detect whether there is a person under the door during the closing process of the rear door 1 to prevent people from being trapped; the distance sensor 11 is located on the lower outer side of the rear door 1 and is connected to the automatic controller 9. The distance sensor 11 is used to detect whether there is an obstacle behind the door during the opening process of the rear door 1 to prevent collisions.

[0025] Specifically, the rear door system for preventing pinching and collision in low-density vehicles provided in this embodiment of the present invention further includes a first solenoid valve 4, a second solenoid valve 5, a solenoid valve seat 6, an oil pump 7, and an oil tank 8. The first solenoid valve 4 and the second solenoid valve 5 are both mounted on the solenoid valve seat 6 and are respectively connected to the solenoid valve seat 6 and the rear door tilting cylinder 3. The solenoid valve seat 6, the oil tank 8, and the automatic controller 9 are all mounted on the chassis 12. The solenoid valve seat 6 is respectively connected to the oil pump 7 and the oil tank 8. The oil pump 7 is mounted on the oil tank 8 and connected to the oil tank 8. The first solenoid valve 4, the second solenoid valve 5, and the oil pump 7 are also electrically connected to the automatic controller 9.

[0026] Specifically, there are two rear door tilting arms 2 and two rear door tilting cylinders 3. The two rear door tilting arms 2 and the two rear door tilting cylinders 3 are symmetrically arranged on both sides of the carriage 13. One end of each rear door tilting arm 2 is hinged to the carriage 13 and the other end is fixed to the rear door 1. One end of each rear door tilting cylinder 3 is hinged to the two rear door tilting arms 2 and the other end is hinged to the rear door frame 12. Each rear door tilting cylinder 3 is connected to the first solenoid valve 4 and the second solenoid valve 5.

[0027] Specifically, see Figures 4 to 5 In this embodiment, both the first solenoid valve 4 and the second solenoid valve 5 are two-position three-way solenoid valves, each having an oil inlet P, an oil return port O, and an oil port A. The oil inlet P of both the first solenoid valve 4 and the second solenoid valve 5 are connected to the oil inlet channel provided on the solenoid valve seat 6, and the oil return port O is connected to the oil return channel provided on the solenoid valve seat 6. The oil port A of the first solenoid valve 4 is connected to the rodless chamber of the two rear door tilting cylinders 3 through the first hydraulic line 14, and the oil port A of the second solenoid valve 5 is connected to the rod chamber of the two rear door tilting cylinders 3 through the second hydraulic line 15.

[0028] Specifically, in this embodiment, the solenoid valve seat 6 has an oil inlet channel and an oil return channel. One end of its oil inlet channel is connected to the oil inlet P of the first solenoid valve 4 and the second solenoid valve 5, and the other end is connected to the pump outlet of the oil pump 7. The pump inlet of the oil pump 7 is connected to the oil tank 8. One end of its oil return channel is connected to the oil return port O of the first solenoid valve 4 and the second solenoid valve 5, and the other end is connected to the oil tank 8 through the filter 16.

[0029] Specifically, in this embodiment, the number of biosensor 10 and distance sensor 11 is at least one.

[0030] Specifically, in this embodiment, the automatic controller 9 is an industrial control all-in-one machine with model number MM-30MR-4MT-700-FX-B; the biosensor 10 is a human infrared sensor with model number TAD-T269A; and the distance sensor 11 is an infrared distance sensor with model number Y7230-N.

[0031] The working principle of the rear door system for preventing people from being pinched and collisions in low-density vehicles provided by this utility model is as follows:

[0032] When the rear door 1 needs to be opened for unloading, the driver activates the automatic controller 9 from the cab. The automatic controller 9 sends a rear door opening signal to the first solenoid valve 4 and the second solenoid valve 5, connecting the oil inlet P of the first solenoid valve 4 to the oil tank 8 and the oil return port P of the second solenoid valve 5 to the oil tank 8. This allows the hydraulic oil in the oil tank 8 to flow sequentially through the oil pump 7, solenoid valve seat 6, first solenoid valve 4, and first hydraulic line 13 into the rodless chambers (i.e., chambers without piston rods) of the two rear door tilting cylinders 3. Simultaneously, the hydraulic oil in the rod chambers of the rear door tilting cylinders 3 flows sequentially through the second hydraulic line 15. The second solenoid valve 5, solenoid valve seat 6, and filter 16 flow back to the oil tank 8, causing the rear door tilting cylinder 3 to extend and push the rear door tilting arm 2 to rotate counterclockwise along the rear door tilting shaft 17, causing the rear door 1 to slide upward along the rear door frame 12, so that the door frame lock hook 18 disengages from the rear door lock hook 19. Then the rear door 1 begins to tilt and open counterclockwise, and the rear door sealing skin 20 is pulled out in the process. During the opening of the rear door 1, the distance sensor 11 is always in working state to detect whether there is an obstacle behind the rear door 1. If there is an obstacle, the door opening stops. If there is no obstacle, the door continues to open until the rear door 1 is fully opened.

[0033] Once the rear door 1 is fully open, the automatic controller 9 automatically opens the unloading roller 21 to begin unloading. After the unloading roller 21 has finished unloading, the automatic controller 9 automatically sends a rear door closing electrical signal to the first solenoid valve 4 and the second solenoid valve 5, causing the first solenoid valve 4 and the second solenoid valve 5 to switch directions. This connects the return port P of the first solenoid valve 4 to the oil tank 8, and the inlet port P of the second solenoid valve 5 to the oil tank 8. The hydraulic oil in the oil tank 8 then flows sequentially through the oil pump 7, the solenoid valve seat 6, the second solenoid valve 5, and the second hydraulic line 15 into the rod chambers (i.e., the chambers with piston rods) of the two rear door tilting cylinders 3. At the same time, the hydraulic oil in the rodless chamber of the rear door tilting cylinder 3 flows back to the oil tank 8 through the first hydraulic line 13, the first solenoid valve 4, the solenoid valve seat 6, and the oil pump 7, causing the rear door tilting cylinder 3 to retract. This pulls the rear door tilting arm 2 to rotate clockwise along the rear door tilting shaft 17, pulling the rear door 1 to close clockwise. During the closing process of the rear door 1, the biosensor 10 is always in working condition to detect whether there is anyone under the rear door 1. If there is someone, the closing stops; if there is no one, the closing continues until the rear door 1 slides down along the rear door frame 12, so that the door frame lock hook 18 and the rear door lock hook 19 engage and lock.

[0034] Finally, it should be noted that the above description is only an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A rear door system for preventing pinching and collision in low-density vehicles, comprising a rear door (1), a rear door tilting arm (2), and a rear door tilting cylinder (3), wherein one end of the rear door tilting arm (2) is fixedly connected to the rear door (1) and the other end is hinged to the vehicle body (13), one end of the rear door tilting cylinder (3) is hinged to the rear door tilting arm (2) and the other end is hinged to the rear door frame (12), wherein the rear door frame (12) is located at the rear end of the vehicle body (13), characterized in that: It also includes an automatic controller (9), a biosensor (10) and a distance sensor (11). The biosensor (10) is located on the lower inner side of the rear door (1) and is connected in communication with the automatic controller (9). The distance sensor (11) is located on the lower outer side of the rear door (1) and is connected in communication with the automatic controller (9).

2. The rear door system for preventing pinching and collisions in low-density vehicles according to claim 1, characterized in that: It also includes a first solenoid valve (4), a second solenoid valve (5), a solenoid valve seat (6), an oil pump (7), and an oil tank (8). The first solenoid valve (4) and the second solenoid valve (5) are both mounted on the solenoid valve seat (6) and are respectively connected to the solenoid valve seat (6) and the rear door tilting cylinder (3). The solenoid valve seat (6), the oil tank (8), and the automatic controller (9) are all mounted on the chassis. The solenoid valve seat (6) is respectively connected to the oil pump (7) and the oil tank (8). The oil pump (7) is mounted on the oil tank (8) and is connected to the oil tank (8). The first solenoid valve (4), the second solenoid valve (5), and the oil pump (7) are also electrically connected to the automatic controller (9).

3. The rear door system for preventing pinching and collisions in low-density vehicles according to claim 2, characterized in that: The number of rear door tilting arms (2) and rear door tilting cylinders (3) are two, and the two rear door tilting arms (2) and rear door tilting cylinders (3) are symmetrically arranged on both sides of the carriage (13). One end of each rear door tilting arm (2) is hinged to the carriage (13), and the other end is fixed to the rear door (1). One end of each rear door tilting cylinder (3) is hinged to the two rear door tilting arms (2), and the other end is hinged to the rear door frame (12). Each rear door tilting cylinder (3) is connected to the first solenoid valve (4) and the second solenoid valve (5).

4. The rear door system for preventing pinching and collision in low-density vehicles according to claim 3, characterized in that: The first solenoid valve (4) and the second solenoid valve (5) are both two-position three-way solenoid valves, each having an oil inlet P, an oil return port O and an oil port A. The oil inlet P of the first solenoid valve (4) and the second solenoid valve (5) are connected to the oil inlet channel provided on the solenoid valve seat (6), and the oil return port O is connected to the oil return channel provided on the solenoid valve seat (6). The oil port A of the first solenoid valve (4) is connected to the rodless chamber of the two rear door tilting cylinders (3) through the first hydraulic pipeline (14), and the oil port A of the second solenoid valve (5) is connected to the rod chamber of the two rear door tilting cylinders (3) through the second hydraulic pipeline (15).

5. The rear door system for preventing pinching and collision in low-density vehicles according to claim 4, characterized in that: The solenoid valve seat (6) has an oil inlet channel and a return channel. One end of the oil inlet channel is connected to the oil inlet P of the first solenoid valve (4) and the second solenoid valve (5), and the other end is connected to the pump outlet of the oil pump (7). The pump inlet of the oil pump (7) is connected to the oil tank (8). One end of the return channel is connected to the return port O of the first solenoid valve (4) and the second solenoid valve (5), and the other end is connected to the oil tank (8) through the filter (16).

6. The rear door system for preventing pinching and collision in low-density vehicles according to claim 1, characterized in that: The number of the biosensor (10) and the distance sensor (11) is at least one.

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