Engine cover hinge for automobile, engine cover assembly and automobile

Abstract

The utility model provides an engine cover hinge for an automobile, an engine cover assembly and the automobile, and the engine cover hinge is arranged at one end, close to an automobile cab, of an engine cover and comprises an engine cover connecting piece, a middle connecting piece, a buffer support and a pin shaft. The two ends of the middle connecting piece are rotationally connected with the engine cover connecting piece and the vehicle body connecting piece respectively, the buffering support is fixedly connected to the engine cover connecting piece and comprises a fixing part, a buffering part and a limiting part which are sequentially connected, and the limiting part comprises an upper buffering structure and a lower buffering structure which are arranged at intervals; one end of the pin shaft is fixedly connected with the middle connecting piece, the bottom of the other end of the pin shaft abuts against the upper side of the limiting part of the buffering support, when the buffering support collides with a pedestrian, the buffering support rotates relative to the middle connecting piece along with the engine cover connecting piece, the limiting part collides with the pin shaft, and the upper buffering structure and the lower buffering structure sequentially deform; the deformation force of the limiting part restrains the bouncing height of the engine cover, thereby preventing pedestrian heads from being damaged and preventing engine cover metal plate from deforming.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile parts, in particular to an engine cover hinge for an automobile, an engine cover assembly and an automobile. Background Art

[0002] When a pedestrian collides with the front of a vehicle, most accidents involve collisions between the pedestrian and the car and then with the hood, resulting in severe head injuries or even death. Traditional hood hinges do not have enough deformation space and there are hard points in the hood hinge area, which can easily cause head injuries to pedestrians when they collide with vehicles.

[0003] With the development of automobile safety technology, in order to meet the requirements of pedestrian protection in automobile design, the engine hood is generally opened to a certain height by external force in the event of a collision. The purpose is: 1. Active pedestrian protection, to improve the active safety performance of pedestrian protection; 2. To prevent the pedestrian's head from colliding with the vehicle's hard objects such as the front windshield, wiper motor and other mechanisms after the collision with the vehicle, to reduce the damage value. At the same time, the opening height of the engine hood should not be too large, otherwise it will cause the engine hood to continue to rise after the pedestrian's head hits the engine hood, causing secondary damage to the pedestrian. For this reason, it is necessary to limit the opening height of the engine hood.

[0004] The prior art has a method of limiting the opening height of the hood when a pedestrian collides with a vehicle, for example, a connecting rod mechanism is set up, and the connecting rod mechanism moves when the hood pops up, thereby limiting the opening height of the hood; however, this connecting rod mechanism has insufficient constraints during the pop-up process, and is prone to instability, causing the hood to pop up too high and injure the pedestrian's head, and also causing deformation of the hood sheet metal. Utility Model Content

[0005] The utility model aims to solve the problem in the prior art that when a pedestrian collides with the front of a vehicle, the engine hood is opened too high, causing damage to the pedestrian's head and deformation of the engine hood sheet metal.

[0006] To solve the above problems, the utility model provides a hood hinge for a car, comprising a hood connector, an intermediate connector, and a body connector; the hood connector is fixedly connected to the hood of the car, the body connector is fixedly connected to the body of the car, one end of the intermediate connector along its length direction is rotatably connected to the hood connector, and the other end is rotatably connected to the body connector, so that the hood connector can rotate relative to the intermediate connector, and the intermediate connector can rotate relative to the body connector, at this time, the end of the hood close to the car cockpit can be lifted upward relative to the body.

[0007] The engine hood hinge also includes a buffer bracket, which includes a fixing portion, a buffer portion and a limiting portion connected in sequence, the fixing portion is fixedly connected to the engine hood connecting piece, and the buffer portion includes an upper buffer structure and a lower buffer structure arranged at intervals along the height direction of the vehicle body.

[0008] The engine hood hinge also includes a pin shaft, one end of which is fixedly connected to the intermediate connecting piece, and the bottom of the other end of the pin shaft abuts against the upper side of the limiting portion, so that when the buffer bracket rotates with the engine hood connecting piece relative to the intermediate connecting piece, the limiting portion of the buffer bracket collides with the pin shaft, and the upper buffer structure and the lower buffer structure are deformed in turn.

[0009] By adopting the above scheme, when a pedestrian collides with the car, the engine hood rotates upward relative to the middle connecting part along the height direction of the car, and the buffer bracket on the engine hood is linked to rotate relative to the middle connecting part. The upper side of the limiting part of the buffer bracket collides with the pin shaft, and the limiting part moves upward relative to the pin shaft, and the pin shaft is fixedly connected to the middle connecting part. Therefore, under the action of the rotational force, the pin shaft collides with the upper buffer structure and the lower buffer structure to deform in turn. The deformation force of the limiting part restricts the pop-up height of the engine hood to prevent the engine hood from popping up too high to injure the pedestrian's head and deform the engine hood sheet metal.

[0010] According to another specific embodiment of the utility model, the engine hood hinge for a car disclosed in the embodiment of the utility model, the engine hood connecting piece includes a first connecting part and a second connecting part in a plate-like structure, the first connecting part is fixedly connected to the bottom end of the engine hood, and the second connecting part is vertically connected to the first connecting part; the intermediate connecting piece is attached to the inner side surface of the second connecting part, the buffer bracket is arranged on the outer side surface of the second connecting part, and the second connecting part is provided with a guide hole adapted to the pin shaft, the other end of the pin shaft passes through the guide hole and abuts against the upper side of the limiting part, and when the engine hood connecting piece rotates relative to the intermediate connecting piece, the pin shaft slides along the guide hole.

[0011] By adopting the above scheme, the engine hood connector is set as a plate-like structure, which has higher stability and thus provides more stable support for the engine hood. The intermediate connector is fitted to the inner side of the second connecting part, so that the engine hood hinge is smaller in size and more flexible, and the reaction speed of the engine hood relative to the movement of the intermediate connector is improved. In addition, a guide hole adapted to the pin shaft and for the pin shaft to slide is provided in the second connecting part. Since the guide hole is a hole with an upper top end and a lower bottom end, when the engine hood connector rotates relative to the intermediate connector, the pin shaft abuts against the lower bottom end of the guide hole, which can limit the rotation angle of the engine hood connector, and further limit the pop-up height of the engine hood, thereby preventing the engine hood from popping up too high and injuring the pedestrian's head.

[0012] According to another specific embodiment of the utility model, the engine hood hinge for a car disclosed in the embodiment of the utility model, the lower buffer structure is an arc-shaped structure protruding outward, the arc angle of the arc structure is 130°-150°, the arc radius is 6mm-10mm, and the thickness is 1mm-3mm.

[0013] With the above solution, the lower buffer structure is an outwardly protruding arc structure, and a buffer space can be formed inside the lower buffer structure to accommodate the maximum deformation of the lower buffer structure, thereby improving the buffer effect of the buffer bracket and further improving the effect of limiting the height of the engine cover pop-up. In addition, the arc structure is limited to a certain curvature, arc radius and thickness, which can also improve the buffer effect of the buffer bracket to a certain extent.

[0014] According to another specific embodiment of the utility model, the engine hood hinge for a car disclosed in the embodiment of the utility model, the buffer bracket also includes a bending portion, the bending portion is connected to an end of the limiting portion away from the fixing portion, and extends upward along the height direction of the vehicle body.

[0015] With the above solution, the bent portion extends upward along the height direction of the vehicle body. As the engine cover is lifted, the extended portion always abuts against the pin shaft, supporting the pin shaft and improving the stability of the buffer bracket. Compared with the method of setting the bent portion too short and without the extended portion, the setting of the extended portion can ensure sufficient deformation of the limit portion, thereby improving the buffering effect of the buffer bracket.

[0016] According to another specific embodiment of the utility model, the engine hood hinge for a car disclosed in the embodiment of the utility model has a fixing part which is provided with a first fixing hole and a second fixing hole which are arranged sequentially from top to bottom, and the fixing part is fixedly connected to the engine hood connecting piece through the first fixing hole and the second fixing hole.

[0017] Compared with the single-hole fixing method, the above-mentioned solution fixes the buffer bracket to the engine cover connecting piece through the first fixing hole and the second fixing hole, which can avoid the single-hole fixing of the buffer bracket causing the buffer bracket to move under the action of the rotational force of the engine cover connecting piece, thereby improving the bracket installation stability and buffering effect.

[0018] According to another specific embodiment of the utility model, the hood hinge for a car disclosed in the embodiment of the utility model, the hood hinge also includes a first connecting rod and a second connecting rod, and the other end of the intermediate connecting member is rotatably connected to the body connecting member through the first connecting rod and the second connecting rod; wherein, one end of the first connecting rod and one end of the second connecting rod are spaced apart and are rotatably connected to the other end of the intermediate connecting member respectively, and the other end of the first connecting rod and the other end of the second connecting rod are spaced apart and are rotatably connected to the body connecting member respectively.

[0019] By adopting the above scheme, a first connecting rod and a second connecting rod are arranged between the intermediate connecting member and the body connecting member and are rotatably connected thereto respectively. On the one hand, the first connecting rod and the second connecting rod can increase the stability of the engine hood hinge, and on the other hand, can also limit the pop-up height of the engine hood to prevent the engine hood from popping up too high and injuring pedestrians' heads and deformation of the engine hood sheet metal.

[0020] According to another specific embodiment of the utility model, the hood hinge for a car disclosed in the embodiment of the utility model is provided with a limiting bolt on the upper side of the body connecting member, and when the hood is in a closed state relative to the body, the bottom of the intermediate connecting member abuts against the limiting bolt; the hood hinge also includes a locking structure, and when the hood connecting member is in a closed position relative to the intermediate connecting member, the locking structure is in a locking state, and the hood connecting member is locked to the intermediate connecting member through the locking structure; when the locking structure is in an unlocked state, the hood connecting member can rotate relative to the intermediate connecting member.

[0021] By adopting the above solution and setting a limit bolt, when the engine cover is closed, the bottom of the intermediate connector can abut against the limit bolt, ensuring that the pin abuts against the upper side of the limit part, preventing the intermediate connector from falling back and causing the buffer part to deform in advance. A locking structure is also provided to ensure that when the locking structure is in a locked state, the side of the engine cover away from the car cockpit can be opened, and when the locking structure is in an unlocked state, the side of the engine cover close to the car cockpit can be opened, enriching the applicable scenarios of the engine cover hinge and improving the adaptability of the engine cover hinge.

[0022] An embodiment of the utility model discloses a hood assembly, including a hood hinge for a car as described in any of the above embodiments, the hood assembly also including: a first driving mechanism, the first driving mechanism is used to drive the hood connecting member to rotate relative to the intermediate connecting member, so that the end of the hood close to the cockpit is lifted upward relative to the vehicle body; a second driving mechanism, the second driving mechanism is used to drive the intermediate connecting member to rotate relative to the vehicle body connecting member, so that the hood rotates upward relative to the vehicle body.

[0023] By adopting the above solution, the rotation of the engine hood relative to the intermediate connecting member or the vehicle body is achieved through two driving mechanisms. Two driving mechanisms are provided, each driving mechanism performs its own function, and the accuracy of the rotation of the engine hood can be improved.

[0024] According to another specific embodiment of the utility model, the engine hood assembly disclosed in the embodiment of the utility model includes two engine hood hinges for a car, and the two engine hood hinges for a car are respectively arranged on both sides of one end of the engine hood close to the car cockpit.

[0025] By adopting the above scheme, two hood hinges for automobiles can fully open the hood. No matter pedestrians collide with the sides or the front of the hood, they can be protected by the pop-up hood to avoid collision between the pedestrians' heads and hard objects in the engine compartment.

[0026] An embodiment of the utility model discloses a car, comprising an engine hood assembly as described in any of the above embodiments, and the car also comprises an electronic control unit, and a first drive mechanism and a second drive mechanism are respectively connected to the electronic control unit for communication.

[0027] The beneficial effects of the utility model are:

[0028] The utility model provides a hood hinge for a car. When a pedestrian collides with the car, an electronic control unit controls a first driving mechanism to drive the hood connector to rotate relative to the middle connector, so that one end of the hood close to the cockpit is lifted upward relative to the car body. When the hood connector rotates relative to the middle connector, a buffer bracket fixedly connected to the hood connector rotates with the hood connector and collides with a pin fixedly connected to the middle connector. The pin slides along a guide hole on the hood connector, so that an upper buffer structure and a lower buffer structure are deformed. The deformation force of the limiting part constrains the pop-up height of the hood, so as to prevent the hood from popping up too high to injure the pedestrian's head and cause deformation of the hood sheet metal. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 A schematic diagram of the hinge structure of the engine cover provided in Example 1 of the utility model;

[0030] Figure 2 This is a schematic diagram of the structure of the buffer bracket in the engine cover hinge provided by Example 1 of the utility model when it is not deformed;

[0031] Figure 3 A schematic diagram of the structure of the buffer bracket in the engine cover hinge after deformation provided by Example 1 of the utility model;

[0032] Figure 4 A schematic diagram of the motion structure of a hood hinge for a car provided in Example 1 of the utility model;

[0033] Figure 5 A schematic diagram of the structure of the engine cover assembly in a closed state provided by Embodiment 2 of the utility model;

[0034] Figure 6 This is a schematic diagram of the structure of the engine hood assembly in the pop-up state provided in Example 2 of the utility model.

[0035] Description of reference numerals:

[0036] 10. Engine cover assembly;

[0037] 100. Engine hood hinge;

[0038] 110. Engine cover connector;

[0039] 111. first connecting portion; 112. second connecting portion; 113. guide hole;

[0040] 120. Intermediate connecting piece;

[0041] 121, first connecting rod; 122, second connecting rod;

[0042] 130. Body connectors;

[0043] 131, limit bolt;

[0044] 140, buffer bracket;

[0045] 141, first fixing hole; 142, second fixing hole; 143, upper buffer structure; 144, lower buffer structure; 145, limiting portion; 146, bending portion;

[0046] 150, pin;

[0047] 200, a first driving mechanism;

[0048] 300. Second driving mechanism. DETAILED DESCRIPTION

[0049] In order to make the purpose, technical solution and advantages of the present invention more clear, the implementation mode of the present invention will be further described in detail below with reference to the accompanying drawings.

[0050] Example 1

[0051] The utility model provides an engine hood hinge for a car, such as Figure 1 As shown, the hood hinge includes a hood connector 110, an intermediate connector 120, a body connector 130, a pin 150 and a buffer bracket 140. The hood connector 110 is fixedly connected to the hood of the car, the body connector 130 is fixedly connected to the body of the car, one end of the intermediate connector 120 along its length direction is rotatably connected to the hood connector 110, and the other end is rotatably connected to the body connector 130, so that the hood connector 110 can rotate relative to the intermediate connector 120, and the intermediate connector 120 can rotate relative to the body connector 130, at which time the end of the hood close to the car cockpit can be lifted upward relative to the body.

[0052] It should be noted that the hood hinge provided in this embodiment is a hinge structure with at least two relative rotations, namely, the hood connector 110 and the intermediate connector 120, and the intermediate connector 120 and the body connector 130 can rotate relative to each other; specifically, it can be one connecting rod, or two connecting rods that are rotatably connected to each other, or three connecting rods that are rotatably connected to each other and form a four-link structure together with the body connector 130; when a collision occurs, the driving mechanism drives the end of the hood close to the car cockpit to open to a certain height, so that the hood connector 110 can rotate relative to the intermediate connector 120, and the intermediate connector 120 can rotate relative to the body connector 130. In addition, the fixed connection between the hood connector 110 and the hood, and the fixed connection between the body connector 130 and the body can be welding, screwing or riveting, or other fixed connection methods, which are not specifically limited in this embodiment.

[0053] Specifically, please refer to Figure 2 and Figure 3 The buffer bracket 140 includes a fixing portion, a buffer portion and a limiting portion 145 connected in sequence, the fixing portion is fixedly connected to the engine cover connecting member 110, and the buffer portion includes an upper buffer structure 143 and a lower buffer structure 144 spaced apart along the height direction of the vehicle body.

[0054] More specifically, the upper buffer structure 143 and the lower buffer structure 144 are spaced apart, and the setting of the space is to achieve that both the upper buffer structure 143 and the lower buffer structure 144 can be sufficiently deformed, and provide sufficient deformation space. Furthermore, the lower buffer structure 144 can be an arc-shaped structure protruding outward, and a buffer space can be formed inside the lower buffer structure 144 to accommodate the maximum deformation of the lower buffer structure 144, thereby improving the buffering effect of the buffer bracket 140, and further improving the limiting effect on the height of the engine cover pop-up. And the arc structure is limited to a certain curvature, arc radius and thickness, for example, the arc structure has a curvature of 130°-150°, an arc radius of 6mm-10mm, and a thickness of 1mm-3mm. It should be noted that the arc structure curvature, arc radius and thickness of the lower buffer structure 144 are set to the optimal values ​​of the buffer effect obtained by the engine cover pop-up test calibration. Compared with the method of only setting the upper buffer structure 143, the buffer bracket 140 is provided with the upper buffer structure 143 and the lower buffer structure 144, which can improve the buffer effect of the buffer bracket 140 to a certain extent. Furthermore, the buffer bracket 140 can be made of metal plates such as steel plates, aluminum plates, and copper plates, which has the advantages of light weight and high strength, can improve the buffer effect, and also has the advantage of lightweight.

[0055] Furthermore, the buffer bracket 140 further includes a bending portion 146 , which is connected to an end of the limiting portion 145 away from the fixing portion and extends upward along the height direction of the vehicle body.

[0056] Specifically, Figure 2 As shown, the entire bending portion 146 is L-shaped along the width direction and height direction of the vehicle body. As the engine cover is lifted, the extension portion is always against the pin 150, supporting the pin 150 and improving the stability of the buffer bracket 140. Compared with the method in which the bending portion 146 is too short and has no extension portion, the provision of the extension portion can ensure sufficient deformation of the limiting portion 145, thereby improving the buffering effect of the buffer bracket 140.

[0057] Furthermore, if Figure 2 As shown, the fixing part is provided with a first fixing hole 141 and a second fixing hole 142 arranged sequentially from top to bottom, and the fixing part is fixedly connected to the engine cover connecting member 110 through the first fixing hole 141 and the second fixing hole 142. Compared with the single-hole fixing method, the buffer bracket 140 is fixedly connected to the engine cover connecting member 110 through the first fixing hole 141 and the second fixing hole 142, which can avoid the single-hole fixing of the buffer bracket 140 so that the buffer bracket 140 moves under the action of the rotational force of the engine cover connecting member 110, thereby improving the bracket installation stability and buffering effect.

[0058] For more details, please refer to Figure 1 One end of the pin is fixedly connected to the intermediate connecting member 120, and the bottom of the other end of the pin 150 abuts against the upper side of the limiting portion 145. When the buffer bracket 140 rotates relative to the intermediate connecting member 120 following the engine cover connecting member 110, the limiting portion 145 of the buffer bracket 140 collides with the pin, and the upper buffer structure 143 and the lower buffer structure 144 are deformed in turn.

[0059] It should be noted that one end of the pin 150 is fixedly connected to the intermediate connecting member 120, and the other end passes through the engine cover connecting member 110 and abuts against the upper side of the limiting portion 145, and as shown in FIG. Figure 4 As shown, the pin shaft 150 and the engine cover connecting member 110 can move relative to each other, ensuring that when the engine cover pops up, the pin shaft 150 can apply a deformation force to the limiting portion 145.

[0060] By adopting the above scheme, when a collision occurs between a pedestrian and a car, the engine hood rotates upward relative to the middle connecting piece 120 along the height direction of the car, and the buffer bracket 140 on the engine hood rotates relative to the middle connecting piece 120. The upper side of the limiting portion 145 of the buffer bracket 140 collides with the pin 150, and the limiting portion 145 moves upward relative to the pin 150, and the pin 150 is fixedly connected to the middle connecting piece 120. Therefore, under the action of the rotational force, the pin 150 collides with the upper buffer structure 143 and the lower buffer structure 144 and deforms in turn. The deformation force of the limiting portion 145 restricts the pop-up height of the engine hood to prevent the engine hood from popping up too high and injuring the pedestrian's head and deformation of the engine hood sheet metal.

[0061] According to one specific implementation of the present utility model, Figure 1 As shown, the engine hood connector 110 includes a first connecting portion 111 and a second connecting portion 112 which are plate-like structures. The first connecting portion 111 is fixedly connected to the bottom end of the engine hood, and the second connecting portion 112 is vertically connected to the first connecting portion 111. The engine hood connector 110 is configured as a plate-like structure. The plate-like structure has higher stability, and thus provides more stable support for the engine hood.

[0062] Specifically, the intermediate connecting member 120 is attached to the inner side of the second connecting portion 112 , so that the engine hood hinge is smaller and more flexible, thereby improving the reaction speed of the engine hood relative to the movement of the intermediate connecting member 120 .

[0063] See also Figure 4 The buffer bracket 140 is arranged on the outer side of the second connecting part 112, and the second connecting part 112 is provided with a guide hole 113 adapted to the pin 150. The other end of the pin 150 passes through the guide hole 113 and abuts against the upper side of the limiter 145. When the hood connector 110 rotates relative to the intermediate connector 120, the pin 150 slides along the guide hole 113. Since the guide hole 113 is a hole with an upper top and a lower bottom, when the hood connector rotates relative to the intermediate connector 120, the pin 150 abuts against the lower bottom of the guide hole 113, which can limit the rotation angle of the hood connector 110, and further limit the pop-up height of the hood, so as to prevent the hood from popping up too high and injuring the pedestrian's head.

[0064] According to one specific embodiment of the present invention, the hood hinge further includes a first connecting rod 121 and a second connecting rod 122, and the other end of the intermediate connecting member 120 is rotatably connected to the vehicle body connecting member 130 through the first connecting rod 121 and the second connecting rod 122. Specifically, one end of the first connecting rod 121 and one end of the second connecting rod 122 are arranged at intervals and are rotatably connected to the other end of the intermediate connecting member 120, respectively, and the other end of the first connecting rod 121 and the other end of the second connecting rod 122 are arranged at intervals and are rotatably connected to the vehicle body connecting member 130, respectively.

[0065] Specifically, the lengths of the first link 121 and the second link 122 can be set according to the limit of the pop-up height of the engine hood, for example, they can be set to any value between 10-18 cm. It should be noted that the first link 121 is set at a position close to the other end of the middle connecting member 120, and the second link 122 is set between the first link 121 and the engine hood connecting member 110. The setting of the first link 121 and the second link 122 can increase the stability of the engine hood hinge on the one hand, and can also limit the pop-up height of the engine hood on the other hand, so as to avoid the engine hood pop-up height being too high to injure the pedestrian's head and the deformation of the engine hood sheet metal.

[0066] According to one specific implementation of the present utility model, Figure 1 As shown, a limit bolt 131 is provided on the upper side of the vehicle body connector 130, and when the engine cover is in a closed state relative to the vehicle body, the bottom of the intermediate connector 120 abuts against the limit bolt 131. In this way, when the engine cover is closed, the bottom of the intermediate connector 120 abuts against the limit bolt 131, ensuring that the pin abuts against the upper side of the limit portion 145, preventing the intermediate connector 120 from falling back and causing the buffer portion to deform prematurely.

[0067] The engine hood hinge also includes a locking structure. When the engine hood connector 110 is in a closed position relative to the intermediate connector 120, the locking structure is in a locked state, and the engine hood connector 110 is locked to the intermediate connector 120 through the locking structure; when the locking structure is in an unlocked state, the engine hood connector 110 can rotate relative to the intermediate connector 120.

[0068] Specifically, the locking structure can be an explosive bolt, and the hood connector 110 and the intermediate connector 120 are fixedly connected to one end of the rotational connection between the two. The structure and working principle of the explosive bolt are prior art and will not be described here. The locking structure can ensure that when the locking structure is in a locked state, the hood connector 110 and the intermediate connector 120 are locked, the intermediate connector 120 rotates relative to the vehicle body, and the hood opens on the side away from the car cockpit; when the locking structure is in an unlocked state, the hood connector 110 and the intermediate connector 120 are unlocked, the intermediate connector 120 can rotate relative to the vehicle body and the hood connector 110, and the hood opens on the side close to the car cockpit. It should be noted that the locking structure remains in a locked state and is only switched to an unlocked state when a pedestrian collides with the car. The locking structure enriches the applicable scenarios of the hood hinge for the car and improves the adaptability of the hood hinge.

[0069] The hood hinge for automobiles is adopted. When a pedestrian collides with the automobile, the electronic control unit controls the first driving mechanism 200 to drive the hood connector 110 to rotate relative to the intermediate connector 120, so that the end of the hood close to the cockpit is lifted upward relative to the vehicle body. When the hood connector 110 rotates relative to the intermediate connector 120, the buffer bracket 140 fixedly connected to the hood connector 110 rotates with the hood connector 110 and collides with the pin 150 fixedly connected to the intermediate connector 120. The pin 150 slides along the guide hole 113 on the hood connector 110, so that the upper buffer structure 143 and the lower buffer structure 144 are deformed. The deformation force of the limiting portion 145 constrains the hood pop-up height to prevent the hood from popping up too high to injure the pedestrian's head and cause deformation of the hood sheet metal.

[0070] More specifically, in order to prove the effect of this solution, on the basis of other related structures being the same, the present invention uses the solution that the buffer part includes an upper buffer structure 143 and a lower buffer structure 144 arranged at intervals along the height direction of the vehicle body as an experimental example, and the solution that the buffer part is only provided with a single buffer structure as a comparative example, and conducts simulation tests. When a pedestrian collides with a car, the comparative example hood hinge can make the end of the hood close to the car cockpit bounce up to a height of 130cm relative to the vehicle body, the bounce time is 55ms, the hood sheet metal plastic strain is 12.35%, the sheet metal deformation is large, and the bounce is unstable; the hood hinge of the experimental example can reduce the hood bounce height to 120cm, the bounce time to 54ms, and the hood sheet metal plastic strain to 9.1%. The comparison of collision data between the comparative example and the experimental example is shown in Table 1. Compared with the comparative example, the reduction in the hood bounce height and the reduction in the bounce time reduce the secondary injury to the pedestrian caused by the hood still rising after the pedestrian's head hits it. At the same time, the buffering energy absorption effect of the experimental example is better, and the deformation of the hood sheet metal is reduced. In this way, when the engine hood pops up, sufficient buffer space can be formed between the bottom of the engine hood and the engine compartment, and the excessive pop-up height of the engine hood will not injure pedestrians' heads or cause deformation of the engine hood sheet metal.

[0071] Table 1 Comparison of collision data between comparative example and experimental example

[0072] plan Bounce time Bounce height Plastic strain of front cover sheet metal Comparative Example 55ms 130.8mm 12.35％ Experimental example 54ms 120.8mm 9.1％

[0073] Example 2

[0074] Based on the above-mentioned engine hood hinge for a car, this embodiment further provides an engine hood assembly 10, including the engine hood hinge for a car as described in any of the above embodiments, such as Figure 5 As shown, the engine hood assembly 10 also includes: a first driving mechanism 200, the first driving mechanism 200 is used to drive the engine hood connecting member 110 to rotate relative to the intermediate connecting member 120, so that the end of the engine hood close to the cockpit is lifted upward relative to the vehicle body; a second driving mechanism 300, the second driving mechanism 300 is used to drive the intermediate connecting member 120 to rotate relative to the vehicle body connecting member 130, so that the engine hood rotates upward relative to the vehicle body.

[0075] Specifically, the first driving mechanism 200 and the second driving mechanism 300 may include a generator, a sleeve and a piston rod, wherein the generator is fixed at the bottom of the sleeve, the sleeve is sleeved on the piston rod, an outlet is arranged at the top of the sleeve, and the generator is actuated to drive the piston rod to be ejected from the outlet, wherein the generator may be an electronic generator or a gunpowder generator, and may be arranged accordingly as required. More specifically, as Figure 6As shown, the piston rod of the first driving mechanism 200 abuts against the lower end of the engine cover connecting piece 110, driving the end of the engine cover close to the cockpit to pop up, and the first driving mechanism 200 is also used to unlock the locking structure, that is, driving the explosive bolt to explode to separate the engine cover connecting piece 110 from the intermediate connecting piece 120; the second driving mechanism 300 abuts against the lower end of the intermediate connecting piece 120, driving the end of the engine cover away from the cockpit to open, and two opening modes of the engine cover are realized by two driving mechanisms. The two driving mechanisms perform their respective functions, which can improve the accuracy of the rotation of the engine cover.

[0076] According to another specific embodiment of the utility model, the hood assembly 10 disclosed in the embodiment of the utility model includes two hood hinges for a car, and the two hood hinges for a car are respectively arranged on both sides of the hood at one end close to the car cockpit. In this way, the two hood hinges for a car can fully open the hood, and no matter pedestrians collide with the sides or the front of the hood, they can be protected by the pop-up hood to avoid collision between the pedestrians' heads and hard objects in the engine compartment.

[0077] Example 3

[0078] Based on the above-mentioned engine hood assembly, this embodiment also provides a car, including the engine hood assembly described in any of the above embodiments, and the car also includes an electronic control unit, and the first drive mechanism and the second drive mechanism are respectively communicatively connected to the electronic control unit.

[0079] It should be noted that the car also includes a detection unit, which can be a sensor arranged on the inner side of the engine hood to detect pressure and acceleration at the upper end of the engine hood, or it can be an image detector arranged at the front end of the engine hood. When the detection unit detects a relevant signal reaching a collision threshold, the automobile electronic control unit controls the first drive mechanism to drive the explosive bolt to explode and drives the engine hood connecting piece to rotate relative to the middle connecting piece to make the end of the engine hood close to the car cockpit pop up; when the engine hood is normally opened, the locking structure is in a locked state, and the automobile electronic control unit controls the second drive mechanism to drive the end of the engine hood close to the car cockpit to pop up.

[0080] The above is a description of the implementation mode of the present utility model by specific specific embodiments. Those skilled in the art can easily understand other advantages and functions of the present utility model from the contents disclosed in this specification. Although the description of the present utility model will be introduced in conjunction with the preferred embodiment, this does not mean that the features of this utility model are limited to this implementation mode. On the contrary, the purpose of introducing the utility model in conjunction with the implementation mode is to cover other options or modifications that may be extended based on the claims of the present utility model. In order to provide a deep understanding of the present utility model, the following description will include many specific details. The present utility model can also be implemented without using these details. In addition, in order to avoid confusion or blurring the focus of the present utility model, some specific details will be omitted in the description. It should be noted that, in the absence of conflict, the embodiments in the present utility model and the features in the embodiments can be combined with each other.

[0081] It should be noted that in this specification, similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0082] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0083] Although the present invention has been illustrated and described with reference to certain preferred embodiments of the present invention, it should be understood by those skilled in the art that the above contents are further detailed descriptions of the present invention in combination with specific embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. Those skilled in the art may make various changes in form and details, including making several simple deductions or substitutions, without departing from the spirit and scope of the present invention.

Claims

1. A hood hinge for a car, comprising a hood connector, an intermediate connector, and a body connector; the hood connector is fixedly connected to the hood of the car, the body connector is fixedly connected to the body of the car, one end of the intermediate connector along its length direction is rotatably connected to the hood connector, and the other end is rotatably connected to the body connector, so that the hood connector can rotate relative to the intermediate connector, and the intermediate connector can rotate relative to the body connector, and the end of the hood close to the car cockpit can be lifted upward relative to the body; It is characterized in that The engine cover hinge also includes: A buffer bracket, the buffer bracket comprising a fixing portion, a buffer portion and a limiting portion connected in sequence, the fixing portion being fixedly connected to the engine cover connecting member, and the buffer portion comprising an upper buffer structure and a lower buffer structure spaced apart in a height direction of the vehicle body; A pin shaft, one end of which is fixedly connected to the intermediate connecting member, and the bottom of the other end of the pin shaft abuts against the upper side of the limiting portion, so that when the buffer bracket follows the engine cover connecting member to rotate relative to the intermediate connecting member, the limiting portion of the buffer bracket collides with the pin shaft, and the upper buffer structure and the lower buffer structure are deformed in turn.

2. The engine hood hinge according to claim 1, characterized in that: The engine cover connecting member comprises a first connecting portion and a second connecting portion in a plate-like structure, wherein the first connecting portion is fixedly connected to the bottom end of the engine cover, and the second connecting portion is vertically connected to the first connecting portion; The intermediate connecting member is fitted to the inner side surface of the second connecting part, the buffer bracket is arranged on the outer side surface of the second connecting part, and the second connecting part is provided with a guide hole adapted to the pin shaft, the other end of the pin shaft passes through the guide hole and abuts against the upper side of the limiting part, and when the engine cover connecting member rotates relative to the intermediate connecting member, the pin shaft slides along the guide hole.

3. The engine hood hinge according to claim 1, characterized in that: The lower buffer structure is an outwardly protruding arc-shaped structure, the arc angle of the arc-shaped structure is 130°-150°, the arc radius is 6mm-10mm, and the thickness is 1mm-3mm.

4. The engine hood hinge according to claim 1, characterized in that: The buffer bracket further includes a bending portion, which is connected to an end of the limiting portion away from the fixing portion and extends upward along a height direction of the vehicle body.

5. The engine hood hinge according to claim 1, characterized in that: The fixing portion is provided with a first fixing hole and a second fixing hole arranged in sequence from top to bottom, and the fixing portion is fixedly connected to the engine cover connecting member through the first fixing hole and the second fixing hole.

6. The engine hood hinge according to any one of claims 1 to 5, characterized in that: The engine hood hinge also includes a first connecting rod and a second connecting rod, and the other end of the intermediate connecting member is rotatably connected to the body connecting member through the first connecting rod and the second connecting rod; wherein, one end of the first connecting rod and one end of the second connecting rod are spaced apart and are rotatably connected to the other end of the intermediate connecting member, and the other end of the first connecting rod and the other end of the second connecting rod are spaced apart and are rotatably connected to the body connecting member, respectively.

7. The engine hood hinge according to any one of claims 1 to 5, characterized in that: A limiting bolt is provided on the upper side of the vehicle body connecting member, and when the engine cover is in a closed state relative to the vehicle body, the bottom of the intermediate connecting member abuts against the limiting bolt; The engine hood hinge also includes a locking structure. When the engine hood connecting member is in a closed position relative to the intermediate connecting member, the locking structure is in a locked state, and the engine hood connecting member is locked to the intermediate connecting member through the locking structure; when the locking structure is in an unlocked state, the engine hood connecting member can rotate relative to the intermediate connecting member.

8. An engine cover assembly, comprising an engine cover, characterized in that: Also includes an engine cover hinge as described in any one of claims 1 to 7; The engine cover assembly also includes: a first driving mechanism, the first driving mechanism being used to drive the engine cover connecting member to rotate relative to the intermediate connecting member so that an end of the engine cover close to the cockpit is lifted upward relative to the vehicle body; The second driving mechanism is used to drive the intermediate connecting member to rotate relative to the vehicle body connecting member, so that the engine cover rotates upward relative to the vehicle body.

9. The engine cover assembly according to claim 8, characterized in that: The engine hood assembly comprises two engine hood hinges, which are respectively arranged on both sides of one end of the engine hood close to the vehicle cockpit.

10. An automobile, characterized in that: The automobile comprises the engine hood assembly as claimed in claim 8 or 9, and the automobile further comprises an electronic control unit, and the first driving mechanism and the second driving mechanism are respectively communicatively connected to the electronic control unit.

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