JP4824444B2 - Automobile having a hood lifting structure - Google Patents

Description

  The present invention relates to an automobile hood lifting structure and an automobile having the structure.

  For the purpose of protecting pedestrians, a structure for lifting the rear end of the hood of an automobile has been proposed. At the time of a collision, a space is provided on the back side of the hood by lifting the hood rear end with the vehicle front end as a fulcrum. When a pedestrian or an obstacle collides with the hood, the hood can be deformed in the direction of the back side by the space provided on the back side of the hood, and the amount of collision energy absorbed by the deformation of the hood can be improved.

  Such a hood rear end lifting structure is described in Patent Document 1 and Patent Document 2, for example. According to Patent Document 1, the hood is fixed to the vehicle body via the bracket at the rear end. The bracket on the vehicle body side and the bracket (swing arm) on the hood side are connected at one point. When the hood is opened by lifting the front end of the vehicle body in the normal state, the hood is opened and closed with the connection portion as a fulcrum. . The bracket on the vehicle body side and the bracket on the hood side are connected via a link that bends and stretches in a dogleg shape. In the event of a collision, the hood rear end can be lifted by extending the link connecting the hood bracket while the hood front end is fixed.

Similarly, in Patent Document 2, the hood is fixed to the vehicle body via a bracket at the rear end. The bracket on the vehicle body side is lifted upward, and at the time of collision, the rear end portion of the hood can be lifted by lifting the bracket on the vehicle body side while fixing the front end portion of the hood. As described above, the conventional hood lifting structure is configured to lift the rear end portion of the hood by lifting upward the portion serving as a fulcrum when the hood is opened during normal operation.
Japanese Patent Laid-Open No. 2001-18844 JP 2003-220972 A

  In such a hood lifting structure, it is preferable that not only the hood but also other parts such as a member for holding the hood have an impact absorbing capability due to deformation. On the other hand, when lifting the hood, a member for pushing the hood is required to have a minimum necessary strength. Therefore, it is difficult for the members related to the pushing and holding of the hood to achieve both the deformation strength for absorbing the impact at the time of collision and the strength required when lifting the hood.

  The present invention has been made against the above circumstances, and in adopting a hood rear end lifting structure in an automobile, deformation strength for absorbing shock at the time of collision, and strength required when lifting the hood rear end, An object of the present invention is to provide an automobile having a hood lifting structure that balances the above.

  An automobile according to an aspect of the present invention includes a hood provided on the front side of a driver's seat, a hinge that connects the hood to a vehicle body at a rear end thereof, and rotates so that the front end of the hood opens in a normal operation. An actuator that operates when there is a collision exceeding a reference, and the hinge lifts the rear end of the hood by the driving force of the operated actuator, and the movable portion by the driving force of the actuator. And a driving arm that supports the movable part in a state where the strength is weaker than that during the pushing after the pushing and lifting the rear end of the hood. Thus, in adopting a hood rear end lifting structure for an automobile, an automobile having a hood lifting structure that achieves both a deformation strength for absorbing shock at the time of collision and a strength required for lifting the hood rear end is provided. be able to.

  Here, the drive arm includes a plate-like portion, and the drive arm pushes the movable portion in a state where the side portion of the plate-like portion is in contact with the movable portion, and raises the rear end of the hood. After that, it is preferable that the movable portion is supported in a state where the wide surface of the plate-like portion is in contact with the movable portion. As a result, the movable part can be configured to push the movable part in a strong direction by rotating the driving arm, and to support the movable part in a weak direction of the driving arm when the movable part is lifted. .

  Further, it is preferable that the plate-like portion is formed by bending a part of the drive arm. Thereby, a drive arm and a plate-shaped part can be shape | molded integrally.

  Further, the drive arm includes a hook at a tip of the plate-like portion, and the hook is configured to restrict the movable portion when the rear end of the hood is pushed down and the plate-like portion is bent. Is preferably engaged. Thereby, even if a plate-shaped part bends, a movable part is not lost.

  Furthermore, it is preferable that the drive arm is detachably engaged with the hinge. As a result, the deformed movable arm can be easily replaced, and the rear end of the hood 202 can be quickly returned to the original state by removing the movable arm.

  According to the present invention, when a hood rear end lifting structure is adopted for an automobile, an automobile having a hood lifting structure that achieves both deformation strength for absorbing shock during a collision and strength required for lifting the hood rear end is provided. can do.

  Hereinafter, embodiments to which the present invention can be applied will be described. For clarity of explanation, the following description and drawings are omitted and simplified as appropriate. Moreover, in each drawing, the same code | symbol is attached | subjected to the same element and the duplication description is abbreviate | omitted as needed.

  FIG. 1 is a side view schematically showing an automobile 200 having a hood hinge 100 according to the present embodiment. In FIG. 1, the body of the hood hinge 100 is cut away. The automobile 200 according to the present embodiment is provided with an engine room 201 in front of the driver's seat. A hood 202 is provided on the engine room 201, and the engine room 201 is covered with the hood 202 in a normal state as shown in FIG.

  The hood 202 is rotatably connected to the vehicle body by the hood hinge 100 between the engine room 201 and the driver's seat. When the engine room is opened, as shown in FIG. 1B, the hood 202 is rotated with the hood hinge 100 as a fulcrum, and the front end of the hood 202 is lifted. Furthermore, by operating the function of the hood hinge 100 according to the present embodiment, the rear end of the hood 202 can be lifted with the front end of the hood 202 fixed to the vehicle body as shown in FIG. it can. Although only one hood hinge 100 is shown in FIG. 1, the hood hinges 100 are provided on the left and right sides of the vehicle body, respectively. Thereafter, the state where the hood 202 is closed as shown in FIG. 1A and the state where the front end of the hood 202 is lifted and the engine room 201 is opened as shown in FIG. As described above, the state in which the rear end of the hood 202 is lifted to reduce the impact at the time of the collision is referred to as an emergency state.

  FIG. 2 is a perspective view showing the hood hinge 100 according to the present embodiment, and FIGS. 3, 4 and 5 are side views showing the hood hinge 100 according to the present embodiment. 3 shows a state where the hood 202 shown in FIG. 1A is closed, and FIG. 4 shows a state where the front end of the hood 202 is lifted to open the engine room 201 shown in FIG. 2 and 5 show a state in which the function of the hood hinge 100 is activated to lift the rear end portion of the hood 202 in order to reduce the impact at the time of collision shown in FIG. As shown in FIG. 2, the hood hinge 100 according to this embodiment includes a fixed bracket 101, a rotating bracket 102, and an arm 103.

  The fixing bracket 101 is a portion that becomes a base of the hood hinge 100 and is a fixing portion between the vehicle body and the hood hinge 100. The fixed bracket 101 and the rotation bracket 102 are engaged with each other in a normal rotation portion 104 so as to be rotatable. As shown in FIG. 4, when the engine room 201 is opened, the front end of the hood 202 is lifted by the rotation of the rotation bracket 102 using the normal rotation unit 104 as a fulcrum. The fixed bracket 101 is engaged with a drive arm 105 for pushing up the rotating bracket 102 in an emergency. The drive arm 105 will be described later.

  The rotating bracket 102 is formed in a substantially L shape, and the bent tip end portion is engaged with the fixed bracket 101 in the normal rotating portion 104. Accordingly, even when the vehicle body armor is above the normal rotation unit 104, the rotation bracket 102 can be rotated without contacting the vehicle body and the rotation bracket 102. The rotation bracket 102 rotates with the normal rotation unit 104 as a fulcrum so that the longitudinal direction thereof is parallel to the rotation surface.

  The pivot bracket 102 and the arm 103 are coupled to each other at an emergency pivot section 106 provided at the end of the pivot bracket 102 opposite to the normal pivot section 104. The emergency rotation unit 106 is a pin that is inserted into a through hole provided in the rotation bracket 102 and a through hole provided in the arm 103, and the emergency bracket 106 and the arm 103 are connected by the emergency rotation unit 106. Are connected. The arm 103 rotates about the emergency rotation unit 106 as an axis. The rotation axis of the emergency rotation unit 106 and the rotation axis of the normal rotation unit 104 are substantially parallel. The through hole of the arm 103 through which the emergency rotation part 106 is inserted is a long hole part 107 (see FIG. 5). Therefore, in the emergency rotation unit 106, the arm 103 can rotate with respect to the rotation bracket 102 so as to bend with the emergency rotation unit 106 as a fulcrum. Thus, it is relatively movable along the elongated hole portion 107 in the rotation direction. In other words, the emergency turning portion 106 can move in the turning direction along the long hole portion 107. The moving direction of the emergency rotation portion 106 in the long hole portion 107 is substantially parallel to the rotation surface of the arm 103.

  At normal times, the arm 103 is fixed to the rotating bracket 102 and is in a state in which it cannot rotate. The hood 202 is fixed to the arm 103, and the hood 202 is lifted by rotating the rotating bracket 102 as shown in FIGS. In an emergency, the function of the hood hinge 100 is activated to release the fixation between the arm 103 and the rotating bracket 102, and as described above, the arm 103 can be rotated with respect to the rotating bracket 102 and the elongated hole portion 107 can be moved. It becomes possible to move in the rotation direction along. Thereby, as shown in FIG.1 (c) and FIG. 5, the rear part of the food | hood 202 can be lifted.

  In this way, the emergency rotation unit 106 is provided on the members (the rotation bracket 102 and the arm 103) between the normal rotation unit 104 and the hood 202 that rotate when the front end of the hood 202 is lifted to open the engine room. Further, a slidable rotating portion is provided. That is, conventionally, the hood 202 is directly fixed to the rotating bracket 102. However, by dividing the rotating bracket 102 into two parts, that is, the rotating bracket 102 and the arm 103, the fixed bracket 101 and the normal rotating portion are arranged. The rear end of the hood 202 can be lifted without moving the 104.

  In other words, the hood 202 is not directly fixed to the rotating bracket 102 but the hood 202 is refracted with the emergency rotating portion 106 as a fulcrum and slid in the rotating direction along the long hole portion 107. By holding, the rear end of the hood 202 can be lifted. It is preferable that the emergency rotation unit 106 is fixed so as not to rotate normally, and can be rotated only in an emergency such as a collision. One of the features of the present embodiment is to switch between the state in which the emergency rotation unit 106 cannot rotate and the state in which the emergency rotation unit 106 can rotate during normal time and emergency.

  FIG. 6 is a view showing a state in which the arm 103 and the rotating bracket 102 are fixed, that is, a non-operating state of the hood hinge 100. The arm 103 and the rotation bracket 102 are engaged by the emergency rotation unit 106 described above, and are engaged by a locking pin 108 that penetrates the arm 103 and the rotation bracket 102 at a position different from the emergency rotation unit 106. It has been stopped. By being engaged at two points of the emergency rotation part 106 and the locking pin 108, the arm 103 cannot rotate with respect to the rotation bracket 102.

  A three-dimensional cam 111 is engaged with the rotation bracket 102 so as to be rotatable about the three-dimensional cam rotation portion 112 as a fulcrum. The three-dimensional cam 111 is a substantially fan-shaped plate member, and a three-dimensional cam rotating portion 112 is provided in the vicinity of the central angle. A part of the three-dimensional cam 111 is arranged so as to overlap the position where the locking pin 108 is provided. As shown in FIG. 1A, when the hood 202 is closed, as shown in FIG. 3, one of the two sides sandwiching the apex provided with the three-dimensional cam rotating portion 112 is pressed. As the surface 122, it arrange | positions so that it may become substantially perpendicular | vertical with respect to a vehicle body advancing direction.

  By applying a force perpendicular to the pressed surface 122, the three-dimensional cam 111 rotates in parallel with the plate surface with the three-dimensional cam rotating portion 112 as a fulcrum. As the three-dimensional cam 111 rotates, a locking pin removal passage 113 which is a through hole is formed along the locus of the locking pin 108 drawn on the three-dimensional cam 111. That is, the locking pin 108 is inserted into a through hole provided in the arm 103 and the rotating bracket 102, and further passes through the locking pin removal / deletion path 113.

  FIG. 6B is a cross-sectional view taken along the cutting line AA in FIG. A hook is provided at one end of the locking pin 108, and the diameter of the hook is formed to be wider than the width of the locking pin pull-out passage 113. A locking portion 114 is formed at one end of the locking pin pull-out passage 113 by the shape of the three-dimensional cam 111. As shown in FIG. 6B, the locking portion 114 is formed so as to rise from the plate surface of the three-dimensional cam 111. In the normal state shown in FIGS. 1A and 1B, the locking pin 108 is pressed by the locking portion 114 so that the locking pin 108 does not come out in a state of passing through the arm 103 and the rotating bracket 102. Thus, the fixing of the arm 103 and the rotating bracket 102 is prevented from being released. That is, the three-dimensional cam 111 is used as a lock plate.

  Here, even if the locking portion 114 does not hold the locking pin 108 and only overlaps the top of the locking pin 108, the locking pin 108 is pulled out while penetrating the arm 103 and the rotating bracket 102. However, in order to prevent the locking pin 108 from being pulled out unexpectedly, it is preferable that the locking pin 108 is pressed by the locking portion 114.

  FIG. 6C is a cross-sectional view taken along the cutting line BB in FIG. A slope 115 is formed by the shape of the three-dimensional cam 111 in the middle of the locking pin pull-out passage 113. The inclined surface 115 is formed between the side where the locking part 114 is formed and the other end along the locking pin pull-out / retraction path 113, and is a direction perpendicular to the rotation direction of the three-dimensional cam 111. It is formed so that the height changes. In other words, the inclined surface 115 is formed so that the surface of the three-dimensional cam 111 moves away from the rotating bracket 102 as it approaches the other end portion from the locking portion 114 side of the locking pin pull-out / retraction path 113. The slope 115 and the locking portion 114 are arranged so as not to overlap.

  FIG. 7A shows an operating state of the hood hinge 100, and shows a state in which the three-dimensional cam 111 is rotated counterclockwise from the state of FIG. 6A. When the three-dimensional cam 111 rotates counterclockwise with the three-dimensional cam rotating portion 112 as a fulcrum, the locking pin 108 moves relative to the three-dimensional cam 111 along the locking pin removal / retraction path 113. To do. Actually, the locking pin 108 penetrates the arm 103 and the rotating bracket 102, and the three-dimensional cam 111 moves relative to the locking pin 108. At this time, when the locking pin 108 reaches the range where the slope 115 is formed, the hook formed at the end of the locking pin 108 contacts the slope 115 and the locking pin 108 rises along the slope 115. . That is, as the inclined surface 115 rises, the locking pin 108 moves in a direction perpendicular to the rotation direction of the three-dimensional cam 111 and away from the rotation bracket 102, so that the locking pin 108 moves to the arm 103. It escapes from the through hole formed.

  FIG. 7B is a cross-sectional view taken along the cutting line CC in FIG. As shown in FIG. 7B, when the hook of the locking pin 108 rises along the inclined surface 115, the locking pin 108 comes out of the hole through which the locking pin 108 is inserted. Thus, when the three-dimensional cam 111 rotates, the locking pin 108 is removed from the arm 103, and the fixing of the arm 103 and the rotating bracket 102 is released. That is, by operating the three-dimensional cam 111, the arm 103 and the rotation bracket 102 can be released from being fixed.

  Here, in this embodiment, since the arm 103, the rotating bracket 102, and the three-dimensional cam 111 are engaged so as to overlap in this order, the three-dimensional cam 111 is engaged with the rotating bracket 102, and the locking pin. Although 108 is removed from the arm 103, it is not limited to this. That is, if the rotating bracket 102, the arm 103, and the three-dimensional cam 111 are engaged so as to overlap in this order, the three-dimensional cam 111 is engaged with the arm 103, and the locking pin 108 is removed from the rotating bracket 102. As a result, the fixation between the arm 103 and the rotating bracket 102 is released.

  When the front end of the hood 202 is lifted to open the engine room, the arm 103 and the rotating bracket 102 need to be fixed. Therefore, normally, the three-dimensional cam 111 must be fixed to the rotating bracket 102. For this reason, the three-dimensional cam 111 and the rotating bracket 102 are locked by the three-dimensional cam locking portion 116. In the three-dimensional cam locking portion 116, a shear pin is inserted into a through hole provided in the three-dimensional cam 111 and a through hole provided in the rotating bracket 102.

  Therefore, the three-dimensional cam 111 and the rotating bracket 102 are engaged and fixed at the three-dimensional cam rotating portion 112 and the three-dimensional cam locking portion 116. In an emergency, the three-dimensional cam 111 can be rotated with respect to the rotating bracket 102 by releasing the fixing of the three-dimensional cam locking portion 116 by the shear pin. The three-dimensional cam 111 and the rotation bracket 102 are fixed by applying a strong force to the pressed surface 122 so that the three-dimensional cam 111 rotates about the three-dimensional cam rotation portion 112 as a fulcrum. The shear pin of the part 116 is released by being sheared. This will be described in detail later.

  Further, in order to assist in fixing the arm 103 and the rotating bracket 102, an auxiliary pin 109 is provided on the rotating bracket 102 and is fitted to a notch 110 formed in the arm 103. A hook is formed at the end of the auxiliary pin 109, and when this hook is fitted to the notch 110, not only the direction of rotation of the emergency rotation unit 106 but also a direction perpendicular to the rotation direction. Also, the arm 103 and the rotating bracket 102 can be fixed. The auxiliary pin 109 is formed at a position farther than the locking pin 108 with respect to the emergency rotation portion 106. Thereby, the arm 103 and the rotation bracket 102 can be fixed with respect to a moment wider than the interval between the emergency rotation portion 106 and the locking pin 108.

  By dividing the member between the hood 202 and the normal rotation unit 104 into the rotation bracket 102 and the arm 103, the strength is lower than in the case of one member. As a result, the rear end portion of the hood 202 is lifted by vibration of the vehicle body, and the emergency rotation portion 106 rotates when the front end portion of the hood 202 is lifted to open the engine room 201. Can be considered. On the other hand, the strength can be reinforced by fixing with the locking pin 108 and the three-dimensional cam 111, the auxiliary pin 109, the notch 110, etc., and the above-mentioned problems can be solved. .

  As shown in FIG. 2, the arm 103 and the rotation bracket 102 are provided with a flange perpendicular to the connection surface provided with the emergency rotation portion 106. As shown in FIGS. 3 and 4, the flange of the arm 103 and the flange of the rotating bracket 102 overlap in a normal state. As a result, the clockwise rotation of the arm 103 with the emergency rotation unit 106 as a fulcrum is prevented. Further, with the locking pin 108 as a fulcrum, it cannot be rotated both clockwise and counterclockwise.

  The drive arm 105 will be described with reference to FIGS. 3, 5, and 8. As shown in FIG. 5, the drive arm 105 is rotatably engaged with the fixed bracket 101 in the drive arm rotation unit 117. The drive arm rotation unit 117 is a pin that is inserted into a through hole provided in the drive arm 105 and a through hole provided in the fixed bracket 101, and the drive arm 105 has the drive arm rotation unit 117 as an axis. Rotate. The drive arm 105 has a shape as shown in FIG. 8, and has a plate-like base portion 105 a provided with a through-hole 117 a through which the drive arm rotation portion 117 is inserted, and an end portion thereof with respect to the plate surface. And a push-up portion 118 bent in the vertical direction. Further, the end of the push-up portion 118 is formed in a key shape as the flange 120. Here, the plate surface of the push-up portion 118 is defined as a support surface 118a, and the side portion indicating the plate thickness is defined as a push-up side 118b.

  As shown in FIG. 3, when the hood 202 is closed, the end opposite to the end where the push-up portion 118 is formed is substantially perpendicular to the traveling direction of the vehicle body as the pressed side 121. Has been placed. By applying a force to the pressed side 121, the drive arm rotates about the drive arm rotation unit 117 as a fulcrum. The drive arm 105 and the rotation bracket 102 are engaged with the fixed bracket 101 in such a positional relationship that the push-up side 118b contacts the rotation bracket 102 when the drive arm 105 rotates. Further, the surface perpendicular to the rotation axis of the drive arm 105 and the surface perpendicular to the rotation axis of the rotation bracket 102 are substantially parallel.

  An actuator 300 for pushing the drive arm 105 is attached to the fixed bracket 101. The actuator 300 has a longitudinal shape, and has a structure in which a pressing portion 302 is accommodated in a cylindrical base portion 301. During operation, the pressing portion 302 protrudes from the base portion 301, and the pressing portion 302 applies a pressing force in a direction perpendicular to the pressed side 121.

  The actuator 300 is connected to an impact detection device (not shown), and operates by receiving a signal indicating that an impact has been detected from the impact detection device. Specifically, explosives are contained in the actuator 300, and the ignition device in the actuator 300 ignites the explosives in response to an impact detection signal from the impact detection device. The pressing part 302 jumps out of the base part 301 by the explosive force of gunpowder. The projecting locus of the pressing portion 302 is substantially parallel to the rotation surfaces of the rotation bracket 102 and the drive arm 105.

  As shown in FIG. 3, the actuator 300 is disposed on the side opposite to the rotation bracket 102 with respect to the drive arm 105. When a force is applied to the pressed side 121, the drive arm 105 rotates about the drive arm rotating unit 117 as a fulcrum. Then, the push-up side 118 b of the push-up part 118 presses the push-up surface 119 formed on the rotating bracket 102. The rotation bracket 102 rotates with the normal rotation unit 104 as a fulcrum, and the push-up side 118b pushes the push-up surface 119.

  The support surface 118a is substantially parallel to a tangent line of a circle serving as a turning locus of the push-up portion 118. Accordingly, when the drive arm 105 rotates and the rotating bracket 102 is pushed up, the support surface 118a comes into contact with the push-up surface 119 as shown in FIG. 5, and the rotating bracket 102 is supported by the support surface 118a. Supported. Thereby, as shown in FIG.1 (c), the food | hood 202 is hold | maintained in the state in which the rear-end part was lifted. Here, the pop-out amount of the pressing portion 302 of the actuator 300 is preferably adjusted so that the support surface 118a stops in a state of being substantially parallel to the push-up surface 119. Alternatively, a stopper that prevents rotation of the drive arm 105 may be provided so that the support surface 118a stops in a state substantially parallel to the push-up surface 119.

  In order to push up the rotating bracket 102, a vertical upward force is required. When the vertical force is obtained by the actuator 300, it is necessary to dispose the longitudinal actuator in the vertical direction, so that a long space is required in the vertical direction. However, it is difficult to provide such a space in the engine room of recent automobiles. The driving arm 105 can convert the horizontal force of the actuator 300 into the vertical direction.

  When a pressing force is applied perpendicularly to the support surface 118a, the pressing force is resisted by the thickness of the push-up portion 118. Further, a pressing force is applied in a direction in which the bent portion of the drive arm 105 is bent. On the other hand, when a pressing force is applied perpendicularly to the lifting side 118b, the pressing force is resisted by the plate width of the lifting portion 118. Further, a pressing force is applied in a direction perpendicular to the direction in which the bent portion of the drive arm 105 is bent.

  In the push-up portion 118, the strength in the plate thickness direction and the plate width direction is low because the gap in the plate thickness direction is narrower. Further, if a pressing force is applied in a direction in which the bent portion bends, it can be considered that the bent portion is further deformed to be bent. Therefore, the push-up portion 118 has a higher strength when the pressing force is applied perpendicularly to the push-up side 118b than when the pressing force is applied perpendicularly to the support surface 118a.

  As described above, when the push-up unit 118 pushes up the rotary bracket 102, the push-up side 118 b comes into contact with the rotary bracket 102 and applies a pressing force in a direction substantially parallel to the plate surface of the push-up unit 118. Accordingly, when the push-up portion 118 pushes up the rotating bracket 102, a force is applied in a direction in which the push-up portion 118 is high in strength, so that sufficient strength can be ensured to push up the turning bracket 102.

  On the other hand, when an obstacle collides with the hood 202 with the rear end portion of the hood 202 shown in FIG. 1C being lifted, the state shown in FIG. A force is applied in the direction of closing the edge. Therefore, the push-up surface 119 applies a pressing force perpendicular to the support surface 118a. As described above, the drive arm 105 is a plate-like member and has low strength against a force in a direction perpendicular to the plate surface. Therefore, when a pressing force is applied perpendicularly to the support surface 118a, the push-up portion 118 is easily deformed.

  When the push-up portion 118 is deformed, the rotation bracket 102 is rotated in the direction in which the hood 202 is lowered with the normal rotation portion 104 as a fulcrum. Thereby, in addition to the deformation | transformation of the hood 202, the impact absorption effect can be acquired further.

  The drive arm 105 is engaged with the fixed bracket 101 by a bolt at the drive arm rotating portion 117. Thereby, the drive arm 105 can be replaced more easily than when the drive arm 105 is engaged with a pin. After the actuator 300 is actuated by the impact detection, the state where the rear end of the hood 202 is lifted can be easily returned to the original state by removing the drive arm 105.

  The strength when the push-up portion 118 pushes up the rotating bracket 102 can be adjusted by the interval in the direction perpendicular to the push-up side 118b of the push-up portion 118, that is, the width of the support surface 118a. Further, the deformation strength of the support surface 118a in a state in which the support surface 118a supports the rotating bracket 102 can be adjusted by the entire drive arm 105 or the plate thickness of the push-up portion 118 and the shape of the push-up portion 118.

  When the impact of the collision of the obstacle against the hood 202 is very strong, a very strong force is applied to the support surface 118a by the rotating bracket 102. Thereby, the push-up part 118 may be bent so as to be substantially parallel to the base part 105a. That is, the push-up portion 118 may not make sense with respect to the rotation direction of the rotation bracket 102. When the support of the push-up surface 119 by the support surface 118a is released, the rotating bracket 102 is not supported, and the rotating bracket 102 returns to the state shown in FIG. In this case, since the hood 202 is closed as shown in FIG. 1A, a space for deforming the hood 202 cannot be secured.

  On the other hand, a flange 120 is formed on the push-up portion 118. As shown in FIG. 9, even when the push-up portion 118 is bent in a direction substantially parallel to the base portion 105 a, the flange 120 engages with the rotating bracket 102 and supports the rotating bracket 102. Therefore, before the rotation bracket 102 is in the state shown in FIG. 3, the rotation bracket 102 is supported by the flange 120 and the rear end portion of the hood 202 can be maintained in a lifted state.

  Next, an emergency operation of the hood hinge 100 according to the present embodiment will be described using the flowchart of FIG. As shown in FIG. 3, the drive arm 105 and the three-dimensional cam 111 are arranged on the track of the pressing portion 302 of the actuator 300, and the three-dimensional cam 111 is closer to the actuator 300 than the drive arm 105. Placed in position. The impact detection device mounted on the automobile detects an impact (S101), and the actuator 300 operates in response to an impact detection signal generated by the impact detection device (S102).

  When the pressing portion 302 of the actuator 300 pops out due to the explosive force of the explosive, the pressing portion 302 first contacts the pressed surface 122 of the three-dimensional cam 111 and presses the three-dimensional cam 111 (S103). When the pressing unit 302 presses the pressed surface 122, the three-dimensional cam 111 rotates using the three-dimensional cam rotating unit 112 as a fulcrum. At this time, the three-dimensional cam 111 and the rotating bracket 102 are fixed at the three-dimensional cam locking portion 116, but the three-dimensional cam 111 is pushed by the pressing force of the actuator 300, and the three-dimensional cam 111 is shared. The pin is sheared (S104), and the three-dimensional cam 111 can rotate with respect to the rotating bracket 102.

  When the three-dimensional cam 111 rotates with respect to the rotation bracket 102, the locking pin 108 that locks the arm 103 and the rotation bracket 102 is removed from the arm 103 by the function of the three-dimensional cam 111 described above. (S105). Thereby, the latching of the arm 103 and the rotating bracket 102 is released. When the pressing portion 302 further advances along the trajectory, the pressing portion 302 then comes into contact with the pressed side 121 of the driving arm 105 and presses the driving arm 105 (S106). When the pressed side 121 is pressed, the drive arm 105 rotates about the drive arm rotation unit 117 as a fulcrum. As the drive arm 105 rotates, the push-up side 118b presses the push-up surface 119, and the rotation bracket 102 rotates using the normal rotation unit 104 as a fulcrum (S107).

  Since the hood 202 is fixed in front of the vehicle body, when the rotation bracket 102 rotates with the normal rotation unit 104 as a fulcrum, the arm 103 rotates with the emergency rotation unit 106 as a fulcrum and the emergency rotation unit 106 It moves along the long hole portion 107 (S108). At the same time, the hood 202 rotates with the fixed portion in front of the vehicle body as a fulcrum, and the rear end of the hood 202 is lifted (S109). Then, the rotating bracket 102 is supported by the support surface 118a (S110).

  When an obstacle collides with the hood 202 in this state, the hood 202 is deformed by the impact, and the impact applied to the hood 202 is transmitted to the rotating bracket 102 and the bent portion 118 of the drive arm 105 is deformed (S111). Thereby, the impact between the hood 202 and the obstacle colliding with the hood 202 is absorbed. Further, the flange 120 and the rotating bracket 102 are fitted, and the rotating bracket 102 is supported by the flange 120 (S112).

  As described above, the hood 202 is rotatably engaged with the vehicle body at the vehicle body front end. Therefore, when lifting the rear end of the hood 202, the hood 202 rotates with the engaging portion of the front end of the vehicle body as a fulcrum. On the other hand, since the rotation bracket 102 normally rotates with the rotation unit 104 as a fulcrum, the rotation locus of the hood 202 and the rotation locus of the rotation bracket 102 are different. Therefore, as shown in FIG. 5, the arm 103 has the broken line P as the rotation locus, and the emergency rotation portion 106 of the rotation bracket 102 has the broken line Q as the rotation locus. When the arm 103 is fixed to the arm 103, the arm 103 and the rotation bracket 102 have different rotation trajectories, and therefore the hood 202 cannot be lifted to a sufficient extent on the back side of the hood 202.

  On the other hand, when the emergency rotation part 106 moves along the long hole part 107, it can respond to the difference in the rotation locus | trajectory of the arm 103 and the rotation bracket 102. FIG. In other words, the emergency rotation portion 106 and the long hole portion 107 eliminate the problem caused by the common use of the portion responsible for opening and closing the hood 202 during normal operation and the portion responsible for lifting the rear end of the hood 202 during emergency operation. ing. The actuator 300 has a structure that can move only in one direction, and the pressing portion 302 protruding from the base 301 is fixed in the state shown in FIG. 5 and does not return to the base 301 side. Therefore, the hood 202 is held in a state where the rear end portion is lifted.

  As described above, the three-dimensional cam 111 and the rotating bracket 102 are locked and fixed by the three-dimensional cam rotating portion 112 and the three-dimensional cam locking portion 116, and The shearing is released by shearing the shear pin. The shearing of the shear pin is performed by a pressing force against the pressed surface 122 of the actuator 300. Therefore, the shear pin of the three-dimensional cam locking portion 116 is not sheared by a force such as vehicle body vibration or vibration when the front end portion of the hood 202 is lifted to open the engine room 201, and the pressed surface 122 by the actuator 300 is not sheared. It is strong enough to be sheared by the pressing force.

  As described above, by using the hood hinge 100 according to the present embodiment, the rear end portion of the hood 202 can be lifted without moving the fixed bracket 101 or the normal rotating portion 104. Further, by using the drive arm 105 according to the present embodiment, the strength required for rotating the rotating bracket 102 or the strength required for opening and closing the hood 202 at normal time, and the rear end of the hood 202 are obtained. It is possible to achieve both the deformation strength necessary for absorbing the impact in the lifted state.

  In the above description, the push-up portion 118 is formed by bending the end portion of the drive arm 105, but it is not particularly necessary to bend it. That is, a plate-like portion such as a bent portion 118 having a plate surface perpendicular to the rotation surface of the drive arm 105 may be formed on the drive arm 105.

  Further, the flange 120 is not limited to the case where the bent portion 118 is formed in a key shape, and may be a convex portion that protrudes from the support surface 118a, for example. That is, the flange 120 is fitted to the rotating bracket 102 and rotated when the rotating bracket 102 applies a pressing force to the supporting surface 118a and the push-up portion 118 is deformed in the reverse direction of the supporting surface 118a. As long as it can be locked.

  Although the rear end portion of the hood 202 is lifted by the rotation of the rotation bracket 102, the present invention is not particularly limited thereto. For example, there may be a movable part that is movable in a direction substantially perpendicular to the plate surface of the hood 202, and the driving arm 105 may apply a pressing force to the movable part. When the movable portion is moved to lift the hood 202, a pressing force is applied to the movable portion by the push-up side 118b, and when the hood 202 is held in a state where the rear end portion of the hood 202 is lifted, the support surface 118a with respect to the movable portion. By applying a pressing force, the same effect as described above can be obtained.

1 is a side view schematically showing an automobile having a hood hinge according to an embodiment of the present invention. It is a perspective view which shows the hood hinge which concerns on embodiment of this invention. It is a permeation | transmission side view which shows the closed state of the hood hinge which concerns on embodiment of this invention. It is a permeation | transmission side view which shows the open state of the hood hinge which concerns on embodiment of this invention. It is a permeation | transmission side view which shows the operating state of the hood hinge which concerns on embodiment of this invention. It is the side view and sectional drawing which show the three-dimensional cam which concerns on embodiment of this invention, and its peripheral part. It is the side view and sectional drawing which show the three-dimensional cam which concerns on embodiment of this invention, and its peripheral part. It is a perspective view which shows the drive arm which concerns on embodiment of this invention. It is a figure which shows typically latching of the rotation bracket by the flange of the drive arm which concerns on embodiment of this invention. It is a flowchart which shows operation | movement of the hood hinge which concerns on embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 Hood hinge, 101 Fixed bracket, 102 Rotation bracket 103 Arm, 104 Normal rotation part, 105 Drive arm, 105a Base part,
106 emergency turning part, 107 long hole part, 108 locking pin, 109 auxiliary pin,
110 notch, 111 three-dimensional cam, 112 three-dimensional cam rotating part,
113 locking pin withdrawal / retraction path, 114 locking portion, 115 slope, 116 three-dimensional cam locking portion,
117 drive arm rotation unit, 118 push-up unit, 118a support surface,
118b Push-up side, 119 Push-up surface, 120 Flange, 121 Pressed side,
122 pressed surface, 200 automobile, 201 engine room, 202 hood,
300 actuator, 301 base, 302 pressing part,

Claims (3)

A hood provided in front of the driver's seat;
A hinge that connects the hood to a vehicle body at a rear end thereof and rotates so that a front end of the hood opens in a normal operation;
An actuator that operates when there is a collision exceeding the reference,
The hinge is
A movable part that lifts the rear end of the hood by the driving force of the actuated actuator;
A drive arm that rotates by driving force of the actuator to push the movable part and supports the movable part after lifting the rear end of the hood ,
The drive arm includes a base portion through which a rotation shaft passes, and a plate-like portion formed by being bent with respect to the base portion at a rotation radial direction end of the base portion,
The base portion and the plate-like portion are rotated by the driving force of the actuator, and the movable portion is pushed in a state where the side portion indicating the plate thickness of the plate-like portion is in contact with the movable portion,
In a state where the wide surface of the plate-like portion is in contact with the movable portion so that the drive arm supports the movable portion in a state where the strength is lower than that during the pushing after raising the rear end of the hood. An automobile that supports the movable part .   The drive arm includes a hook at a tip of the plate-like portion,
  The automobile according to claim 1, wherein when the rear end of the hood is pushed down and the plate-like part is bent, the hook engages with the movable part so as to regulate the movable part. The vehicle according to claim 1, wherein the drive arm is detachably engaged with the hinge.

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