CN210062917U

CN210062917U - Active engine hood connecting mechanism, control system thereof and vehicle

Info

Publication number: CN210062917U
Application number: CN201920233660.2U
Authority: CN
Inventors: 董传林; 汪家胜
Original assignee: BAIC Motor Co Ltd
Current assignee: BAIC Motor Co Ltd
Priority date: 2019-02-22
Filing date: 2019-02-22
Publication date: 2020-02-14
Anticipated expiration: 2029-02-22

Abstract

The active engine hood connecting mechanism comprises an air stay rod and a connecting support, wherein the air stay rod is connected between an engine hood and a vehicle body, the connecting support is connected to the engine hood, one end of the air stay rod is rotatably connected to the vehicle body through a first rotating shaft, the other end of the air stay rod is connected to the engine hood, the connecting mechanism further comprises a connecting rod, one end of the connecting rod is connected to the connecting support, the other end of the connecting rod is connected to the air stay rod, the connecting rod has a locking state and an unlocking state, the air stay rod can drive the connecting support to rotate around the first rotating shaft in the locking state, and the air is inflated in the air stay rod to drive the connecting support to rotate around a hood lock at the front end of the engine hood in the unlocking state so as to lift the engine hood. This coupling mechanism can realize the normal switching of engine bonnet under the locking state, and when bumping, can initiatively jack up the rear end of engine bonnet, reduce the injury to the pedestrian.

Description

Active engine hood connecting mechanism, control system thereof and vehicle

Technical Field

The disclosure relates to the field of engine hoods of vehicles, in particular to an active engine hood connecting mechanism, a control system of the active engine hood connecting mechanism and a vehicle.

Background

With the popularization of automobiles, people pay more and more attention to the safety performance of the automobiles. Most safety measures are provided for improving the passenger protection performance, but the pedestrian collision accident of the automobile occupies a large proportion of the traffic accident, and due to the lack of the protection measures for protecting the pedestrians, the pedestrian directly exposed in various traffic environments is threatened greatly. In a pedestrian collision event, a pedestrian typically applies a downward force to the hood, however, the buffer space between the hood and the engine compartment is small, resulting in excessive crash acceleration and increased injury values to the pedestrian.

SUMMERY OF THE UTILITY MODEL

An object of the present disclosure is to provide an active hood attachment mechanism capable of jacking up a rear end of a hood at the time of a collision, increasing a cushion space.

In order to achieve the above object, the present disclosure provides an active hood attachment mechanism, including a gas strut for connecting between a hood and a vehicle body and an attachment bracket for connecting to the hood, one end of the gas strut being rotatably connected to the vehicle body through a first rotating shaft, and the other end of the gas strut being connected to the hood, and the attachment mechanism further including a connecting rod having one end connected to the attachment bracket and the other end connected to the gas strut, the connecting rod having a locked state in which the gas strut can drive the attachment bracket to rotate around the first rotating shaft and an unlocked state in which the gas strut is inflated to drive the attachment bracket to rotate around a hood lock at a front end of the hood to lift up the hood.

Optionally, the connecting mechanism further comprises a locking member, the locking member comprises a lock bolt and a housing for connecting to the gas strut, the housing has a cavity for accommodating the lock bolt, in the locking state, the lock bolt is accommodated in the cavity and protrudes out of the housing to stop the connecting rod, so that the connecting rod is fixed to the gas strut, and in the unlocking state, the lock bolt is released from the cavity and is separated from the housing, so as to release the connecting rod.

Optionally, a groove is formed on the lock bolt, a through hole opposite to the groove is formed on the housing, the through hole is communicated with the groove and an air cavity of the air supporting rod, the through hole is arranged opposite to the groove, a first ball is accommodated in the through hole, a locking spring is accommodated in the groove, a second ball is arranged between the first ball and the locking spring, a compression spring is further arranged in the cavity, one end of the compression spring abuts against the bottom wall of the cavity, the other end of the compression spring abuts against the lock bolt, in the locking state, the locking spring applies an elastic force moving towards the first ball to the second ball so that the first ball abuts against the hole wall of the through hole, in the unlocking state, the air pressure in the air cavity forces the first ball to drive the second ball to move towards the groove to compress the locking spring, moving the second ball completely out of the through hole into the recess so that the compression spring can drive the latch bolt to move upward to disengage from the housing to release the connecting rod.

Optionally, an opening of the through hole communicating with the air cavity is smaller than a diameter of the first ball.

Optionally, the outer surface of the gas strut is convexly provided with a sliding beam, a sliding groove is formed in the sliding beam along the extending direction of the gas strut, the connecting rod is connected to the inside of the sliding groove through a second rotating shaft and is connected to the connecting bracket through a third rotating shaft, in the locking state, the second rotating shaft is fixed to one end, close to the first rotating shaft, of the sliding groove, so that the gas strut can drive the connecting bracket to rotate around the first rotating shaft, and in the unlocking state, the gas strut can drive the connecting bracket to rotate around the hood lock by enabling the second rotating shaft to slide in the sliding groove towards the direction away from the first rotating shaft, so as to lift the engine hood.

Optionally, in the unlocked state, the length of the second rotating shaft moving along the sliding groove is the same as the length of the piston rod in the air strut extending out of the air cavity.

Optionally, the air stay and the attachment bracket are both detachably attached to the inner panel of the hood.

According to still another aspect of the present disclosure, there is also provided a control system of an active hood attachment mechanism, including a controller and a sensor for detecting a collision signal, and the active hood attachment mechanism disclosed above, the sensor being electrically connected to the controller, and the controller being electrically connected to the gas strut.

According to still another aspect of the present disclosure, there is also provided a vehicle including the control system disclosed above.

The beneficial effect of this technique is: this active engine hood coupling mechanism can realize the normal switching of engine hood under the locking state, when the emergence collision, can initiatively jack-up the rear end of engine hood, and increase buffering space reduces the injury to the pedestrian.

Additional features and advantages of the disclosure will be set forth in the detailed description which follows.

Drawings

The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure without limiting the disclosure. In the drawings:

FIG. 1 is an assembly view of an active hood attachment mechanism provided by an embodiment of the present disclosure in a locked state;

FIG. 2 is an exploded view of FIG. 1;

FIG. 3 is an assembly view of an active hood attachment mechanism provided by an embodiment of the present disclosure in an unlocked state;

FIG. 4 is a partial cross-sectional view of a latch member and a gas strut in an active hood attachment mechanism provided by an embodiment of the present disclosure.

Description of the reference numerals

1 gas strut 11 gas cavity 12 sliding beam

13 piston rod 2 connecting bracket 3 connecting rod

4 latch 41 latch 411 recess

42 casing 421 cavity 422 through-hole

5 first ball 6 second ball 7 locking spring

8 compression spring 9 sliding groove 10 second rotating shaft

20 third rotating shaft 14 shaft hole 30 bolt

Detailed Description

The following detailed description of specific embodiments of the present disclosure is provided in connection with the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present disclosure, are given by way of illustration and explanation only, not limitation.

As shown in fig. 1 to 4, the present disclosure provides an active hood connecting mechanism, including a gas strut 1 for connecting between a hood and a vehicle body and a connecting bracket 2 for connecting to the hood, one end of the gas strut 1 is rotatably connected to the vehicle body through a first rotating shaft, and the other end is connected to the hood, and the connecting mechanism further includes a connecting rod 3, one end of the connecting rod 3 is connected to the connecting bracket 2, and the other end is connected to the gas strut 1, the connecting rod 3 has a locked state and an unlocked state, in the locked state, the gas strut 1 can drive the connecting bracket 2 to rotate around the first rotating shaft, and in the unlocked state, the gas strut 1 is inflated to drive the connecting bracket 2 to rotate around a hood lock at the front end of the hood to lift the hood.

Firstly, the connecting mechanism replaces the original hinge through the gas strut 1, one end of the connecting mechanism is connected to the engine hood, and the other end of the connecting mechanism is movably connected with a fixed seat through a first rotating shaft (the fixed seat is connected to the vehicle body, the first rotating shaft passes through a shaft hole 14 at one end of the gas strut, the first rotating shaft and the fixed seat are not shown in the figure), so that the gas strut 1 can rotate around the first rotating shaft, and the normal opening and closing functions of the engine hood are realized. In addition, this coupling mechanism can realize the function that lifts the rear end of engine bonnet when taking place pedestrian's collision accident simultaneously.

Specifically, as shown in fig. 1, the end of the gas strut 1 away from the shaft hole 14 is a ball end, in order to avoid deformation influence on the engine hood caused by rotation of the ball end during normal opening and closing, in the present embodiment, the gas strut 1 and the connecting bracket 2 are connected to the engine hood together, and when the engine hood works normally, as shown in fig. 1, the connecting rod 3 is in a locked state, the gas strut 1 is constrained by the connecting bracket 2, and meanwhile, the connecting bracket 2 can rotate around the first rotating shaft along with the gas strut 1, so as to achieve normal opening and closing of the engine hood. When the pedestrian collision accident happens, as shown in fig. 3, the connecting rod 3 unlocks, and the air cavity 11 in the air stay bar 1 starts to be inflated at the moment, so that the piston rod 13 in the air cavity 11 can stretch out, and the connecting bracket 2 is driven to rotate around the hood lock at the front end of the engine hood simultaneously to lift up the rear end of the engine hood, so that the rear end of the engine hood can be in contact with the pedestrian in advance, the buffering space is increased, the engine hood is ensured to be capable of generating large deformation, and the injury to the head of the pedestrian can be reduced.

Further, as shown in fig. 1 and 4, in order to enable the connecting rod 3 to be switched between the locking state and the unlocking state, in the present embodiment, the connecting mechanism further includes a locking member 4, the locking member 4 includes a latch 41 and a housing 42 for connecting to the gas strut 1, the housing 42 has a cavity 421 for accommodating the latch 41, in the locking state, the latch 41 is accommodated in the cavity 421 and protrudes from the housing 42 to stop the connecting rod 3, so that the connecting rod 3 is fixed to the gas strut 1, and in the unlocking state, the latch 41 is released from the cavity 421 and is separated from the housing 42 to release the connecting rod 3.

That is, when the engine normally works, the locking piece 4 is locked on the air stay bar 1 by stopping the connecting rod 3 through the lock bolt 41, so that the connecting bracket 2, the connecting rod 3 and the air stay bar 1 are fixed into a whole and can be linked with the air stay bar 1 to realize normal opening and closing of the engine cover. In case of pedestrian collision accident, the air chamber 11 in the air stay bar 1 is inflated to eject the piston rod 13, and the lock bolt 41 is disengaged from the housing 42 to release the connecting rod 3, at the moment, the connecting rod 3 and the connecting bracket 2 can move relative to the air stay bar 1, so that the piston rod 13 can drive the connecting bracket 2 to rotate around the hood lock to lift the rear end of the engine hood and increase the buffer space.

Specifically, in the present embodiment, a groove 411 is formed on the latch 41, a through hole 422 opposite to the groove 411 is formed on the housing 42, the through hole 422 communicates the groove 411 with the air chamber 11 of the air supporting rod 1, the through hole 422 is opposite to the groove 411, a first ball 5 is accommodated in the through hole 422, a locking spring 7 is accommodated in the groove 411, a second ball 6 is arranged between the first ball 5 and the locking spring 7, a compression spring 8 is further arranged in the cavity 421, one end of the compression spring 8 abuts against the bottom wall of the cavity 421, and the other end of the compression spring abuts against the latch 41.

Thus, in the locked state, the locking spring 7 applies an elastic force to the second ball 6 moving towards the first ball 5, so that the first ball 5 abuts against the hole wall of the through hole 422, and in the unlocked state, the air pressure in the air chamber 11 forces the first ball 5 to drive the second ball 6 to move towards the recess 411 to compress the locking spring 7, and move the second ball 6 completely out of the through hole 422 into the recess 411, so that the compression spring 8 can drive the latch 41 to move upwards to be separated from the housing 42 to release the connecting rod 3.

That is, in the locked state, the second ball 6 is simultaneously located on the through hole 422 and the recess 411, which can effectively prevent the compression spring 8 from ejecting the latch 41, and at this time, the latch 41 stops the connecting rod 3 to lock the connecting rod 3; in the unlocking state, the air chamber 11 in the gas strut 1 is inflated, the air pressure forces the first ball 5 to press the second ball 6 to move towards the groove 411 through the through hole 422 until the second ball 6 is completely removed from the through hole 422, at the moment, the compression spring 8 can drive the lock bolt 41 to move upwards and completely remove the lock bolt from the cavity 421, at the moment, the connecting rod 3 is released, and the gas strut 1 can drive the connecting bracket 2 to rotate around the hood lock so as to lift the rear end of the engine hood.

More specifically, in order to avoid the first ball 5 from moving out of the through hole 422 into the air chamber 11, in the present embodiment, the opening of the through hole 422 communicating with the air chamber 11 is smaller than the diameter of the first ball 5 to avoid the first ball 5 from rolling toward the inside of the air chamber 11 by the thrust of the second ball 6 in the locked state.

Further, in order to satisfy that the connecting bracket 2 can be driven by the gas strut 1 to rotate around the hood lock in the unlocking state, in the present embodiment, a sliding beam 12 is convexly disposed on an outer surface of the gas strut 1, a sliding groove 9 is disposed on the sliding beam 12 along an extending direction of the gas strut 1, the connecting rod 3 is connected into the sliding groove 9 through a second rotating shaft 10 and is connected into the connecting bracket 2 through a third rotating shaft 20, in the locking state, the second rotating shaft 10 is fixed to one end, close to the first rotating shaft, of the sliding groove 9, so that the gas strut 1 can drive the connecting bracket 2 to rotate around the first rotating shaft, in the unlocking state, the second rotating shaft 10 slides in the sliding groove 9 in a direction away from the first rotating shaft, so that the gas strut 1 can drive the connecting bracket 2 to rotate around the hood lock to lift up the engine hood.

Specifically, when the engine hood normally works, the connecting rod 3 and the connecting bracket 2 are locked relative to the air stay bar 1 by fixing the second rotating shaft 10 to one end of the sliding groove 9 close to the first rotating shaft, and the engine hood is normally opened and closed by being linked with the air stay bar 1; when the pedestrian collision accident happens, at first, the air cavity 11 in the air stay rod 1 is inflated, the piston rod 13 is ejected out, the unlocking of the connecting rod 3 is realized at the same time, in the ejecting process, the second rotating shaft 10 can slide and rotate along the sliding groove 9, at the moment, the relative motion occurs between the connecting rod 3 and the connecting bracket 2, the piston rod 13 can be further realized to drive the connecting bracket 2 to rotate around the hood lock, the rear end which finally drives the engine hood is lifted upwards, the buffer space between the engine hood and the engine cabin is increased, the injury caused by the impact of the head of the pedestrian on the engine hood is reduced, and the active protection for the pedestrian is improved.

In addition, in the present embodiment, in the unlocked state, the second rotating shaft 10 moves along the slide groove 9 by the same length as the length of the piston rod 13 in the gas strut 1 protruding from the gas chamber 11. Like this, can guarantee that linking bridge 2 and gas vaulting pole 1 are connected to the distance of the one end of engine bonnet and remain unanimous throughout, avoid when taking place the motion, lead to the engine bonnet to take place to warp between two tie points. That is, as shown in fig. 1 and 3, the air stay 1 is connected to a first fixing point of the vehicle body and a second fixing point of the hood, respectively, the connecting bracket 2 is connected to a third fixing point of the hood, and the connecting lines of the three fixing points constitute a triangular structure, and in the unlocked state, as shown in fig. 3, the distance between the second fixing point and the third fixing point is constant, while the distance between the first fixing point and the third fixing point is increased, and the distance between the second fixing point and the first fixing point is increased, so that the rear end of the hood can be lifted up.

In order to facilitate disassembly, in the present embodiment, both the air stay 1 and the attachment bracket 2 are detachably attached to the inner panel of the hood. As shown in fig. 1, a bolt 30 is provided on the ball end of the air stay 1, and is connected to the inner panel of the engine hood by the bolt 30. The connecting bracket 2 may also be bolted to the inner panel of the hood, and in other embodiments, may also be in the form of a welded fastening, without limiting the present disclosure.

According to another aspect of the present disclosure, there is also provided a control system of an active hood attachment mechanism and a vehicle including the same, the control system including a controller and a sensor for detecting a collision signal, and the active hood attachment mechanism disclosed above, the sensor being electrically connected to the controller, and the controller being electrically connected to the gas strut 1.

The specific working process is as follows: when taking place emergency collision, the sensor detects the collision strength signal of car, and transmit this collision signal to the controller, the controller can control gas vaulting pole 1 and aerify, piston rod 13 is with engine bonnet jack-up, and unblock connecting rod 3 and linking bridge 2, rotate around the aircraft bonnet lock jointly with can drive linking bridge 2 simultaneously, realize the lifting of engine bonnet rear end, timely increase collision buffering space, reduce the injury of engine bonnet to pedestrian's head, the initiative protection to the pedestrian has been promoted greatly.

Wherein the controller may be an emergency switch. When a driver encounters an emergency, the switch is pressed to enable the air stay rod to act so as to lift the engine cover. Of course, the controller may also be a logic control circuit or a PLC controller, etc. The sensor may be a crash sensor applied to an airbag and may be of the type 4M 0959651.

The preferred embodiments of the present disclosure are described in detail with reference to the accompanying drawings, however, the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present disclosure within the technical idea of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure. It should be noted that, in the foregoing embodiments, various features described in the above embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, various combinations that are possible in the present disclosure are not described again.

In addition, any combination of various embodiments of the present disclosure may be made, and the same should be considered as the disclosure of the present disclosure, as long as it does not depart from the spirit of the present disclosure.

Claims

1. An active hood connection, characterized in that it comprises a gas strut (1) for connecting between a hood and a vehicle body and a connecting bracket (2) for connecting to a hood, said gas strut (1) being rotatably connected at one end to said vehicle body by a first axis of rotation and at the other end to said hood, and said connection further comprises a connecting rod (3), said connecting rod (3) being connected at one end to said connecting bracket (2) and at the other end to said gas strut (1), said connecting rod (3) having a locked state in which said gas strut (1) is able to bring said connecting bracket (2) to rotate about said first axis of rotation and an unlocked state in which said gas strut (1) is inflated so as to be able to bring said connecting bracket (2) to rotate about a hood lock at the front end of said hood, to lift the hood.

2. The active hood connection according to claim 1, characterized in that it further comprises a locking member (4), said locking member (4) comprising a latch (41) and a housing (42) for connection to the gas strut (1), said housing (42) having a cavity (421) for receiving said latch (41), in the locked state said latch (41) being received in said cavity (421) and projecting from said housing (42) to stop said connecting rod (3) so as to secure said connecting rod (3) to said gas strut (1), and in the unlocked state said latch (41) being disengaged from said housing (42) from within said cavity (421) to release said connecting rod (3).

3. The active hood connection according to claim 2, wherein a groove (411) is formed on the latch (41), a through hole (422) opposite to the groove (411) is formed on the housing (42), the through hole (422) communicates the groove (411) and the air chamber (11) of the air stay (1), the through hole (422) is arranged opposite to the groove (411), a first ball (5) is accommodated in the through hole (422), a locking spring (7) is accommodated in the groove (411), a second ball (6) is arranged between the first ball (5) and the locking spring (7), a compression spring (8) is further arranged in the cavity (421), one end of the compression spring (8) abuts against the bottom wall of the cavity (421), and the other end abuts against the latch (41), in the locked state, the locking spring (7) applies an elastic force to the second ball (6) moving towards the first ball (5) to make the first ball (5) abut against the hole wall of the through hole (422), and in the unlocked state, the air pressure in the air cavity (11) forces the first ball (5) to drive the second ball (6) to move towards the groove (411) to compress the locking spring (7) and completely move the second ball (6) out of the through hole (422) into the groove (411) to make the compression spring (8) drive the lock bolt (41) to move upwards to be separated from the housing (42) to release the connecting rod (3).

4. The active hood attachment mechanism of claim 3 wherein the opening of the through hole (422) in communication with the air chamber (11) is smaller than the diameter of the first ball (5).

5. The active hood connection according to claim 3 or 4, characterized in that a sliding beam (12) is convexly disposed on an outer surface of the gas strut (1), the sliding beam (12) has a sliding slot (9) along an extending direction of the gas strut (1), the connecting rod (3) is connected to the sliding slot (9) through a second rotating shaft (10) and is connected to the connecting bracket (2) through a third rotating shaft (20), in the locked state, the second rotating shaft (10) is fixed to an end of the sliding slot (9) close to the first rotating shaft, so that the gas strut (1) can drive the connecting bracket (2) to rotate around the first rotating shaft, in the unlocked state, the gas strut (1) can drive the connecting bracket (2) to rotate around the hood lock by sliding the second rotating shaft (10) in the sliding slot (9) in a direction away from the first rotating shaft, to lift the hood.

6. The active hood connection according to claim 5, characterized in that in the unlocked state, the second rotary shaft (10) moves along the slide groove (9) for the same length as the piston rod (13) in the gas strut (1) protrudes from the gas chamber (11).

7. The active hood attachment according to claim 1, characterized in that the air stay (1) and the attachment bracket (2) are both detachably attached to the inner panel of the hood.

8. An active hood connection control system, characterized by comprising a controller and a sensor for detecting a crash signal, and an active hood connection according to any of claims 1-7, the sensor being electrically connected to the controller, the controller being electrically connected to the gas strut (1).

9. A vehicle comprising a control system for an active hood attachment mechanism according to claim 8.