An engine bonnet hinge arrangement

Abstract

The application relates to an engine hood hinge device, belonging to the technical field of engine hoods, which comprises a hinge structure, a locking structure and a connecting pin. The hinge structure comprises a hinge base, a hinge leaf and a hinge arm. The connecting pin is arranged on the hinge leaf. The locking structure comprises a guide shaft and a lock sleeve arranged on the guide shaft. One end of the connecting pin is inserted into the lock sleeve. Relative rotation of the lock sleeve and the guide shaft can drive the lock sleeve to move axially along the guide shaft to realize locking or unlocking of the connecting pin. When the connecting pin on the hinge base is locked by the lock sleeve, the inner wall of the lock sleeve is attached to the outer periphery of the connecting pin to realize circumferential limiting of the connecting pin, so that the locking structure can more firmly and stably limit the connecting pin when locking, and the problems of unstable limiting, shaking and abnormal sound of the hinge leaf and the hinge base can be avoided. Through rotation of the lock sleeve to realize axial movement, locking and separation of the connecting pin are finally realized. The engine hood hinge device has the advantages of good locking stability, small space required for separation, firm and reliable structure scheme and the like.

Description

Technical Field

[0001] This application relates to the field of engine hood technology, and in particular to an engine hood hinge device. Background Technology

[0002] Currently, in accidents involving the front of a motor vehicle, such as a car, striking a pedestrian, the pedestrian's head typically hits the vehicle's hood, potentially resulting in serious injury. The severity of the injury stems from the fact that the front or hood, usually made of thin sheet metal, is prone to bending and then deforming against the rigid engine components (such as the engine block) located beneath it. To reduce the severity of these accidents, the use of deployable hoods is known. A "collision position" is achieved by raising the rear of the deployable hood to a raised position, thus increasing the distance between the hood and the rigid engine components.

[0003] In related technologies, invention CN113431455B discloses a sinkable, cushioned hood hinge, which includes a hinge base, a hinge hinge, a hinge arm, and a locking structure. The hinge base is used for fixed connection to the vehicle body and has a track groove. The hinge hinge is rotatably connected to the hinge base and has a connecting pin that passes through the track groove. When the hinge hinge rotates relative to the hinge base, the connecting pin moves within the track groove. One end of the hinge arm is fixedly connected to the hood, and the other end is rotatably connected to the hinge hinge. The locking structure is mounted on the hinge base and is used to lock or unlock the connecting pin. This sinkable, cushioned hood hinge provides a certain amount of crumple space, preventing pedestrians from directly contacting the hard points of the hinge structure and reducing the risk of head injuries. Furthermore, since the entire hinge assembly remains undamaged during the sinking process, it can be reused without replacement.

[0004] However, the locking structure uses a rod-shaped limiting member to hold the connecting pin in place. The small contact area between the locking structure and the connecting pin during locking results in a lack of firm restraint on the connecting pin, causing the connecting pin to wobble and make noise during normal operation of the hood hinge. Therefore, it is necessary to propose a new hood hinge device to overcome the aforementioned technical problems. Summary of the Invention

[0005] This application provides an engine hood hinge device to solve the problem in related technologies where the locking structure has a small contact surface with the connecting pin when locked, resulting in insecure locking of the connecting pin and causing the hinge to wobble and make abnormal noise.

[0006] This application provides an engine hood hinge device, including:

[0007] The hinge structure includes a hinge seat for fixed connection with the vehicle body, a hinge hinge rotatably connected to the hinge seat, and a hinge arm rotatably connected to the hinge hinge and for fixed connection with the engine hood, wherein the hinge hinge is provided with a connecting pin.

[0008] A locking structure includes a guide shaft and a locking sleeve sleeved on the guide shaft. One end of the connecting pin extends into the locking sleeve. The relative rotation of the locking sleeve and the guide shaft can drive the locking sleeve to move axially along the guide shaft to lock or unlock the connecting pin.

[0009] In some embodiments, the hinge seat is provided with a mounting bracket, the outer ring of the locking sleeve is integrally connected with a worm gear, and the locking structure also includes a motor mounted on the mounting bracket, and a worm connected to the motor and used to drive the worm gear to rotate.

[0010] In some embodiments, the guide shaft is provided with a guide groove, and the inner side of the locking sleeve is provided with a slider that cooperates with the guide groove. The guide groove has an inclined surface that guides the slider to move axially along the guide shaft.

[0011] In some embodiments, the guide shaft includes a large-diameter section and a small-diameter section coaxially arranged, the locking sleeve is sleeved on the large-diameter section and slidably connected to the large-diameter section, and the guide groove is located on the large-diameter section with the groove opening facing the small-diameter section.

[0012] In some embodiments, the guide groove has a plane that restricts the slider to move circumferentially about the guide axis, the plane being parallel to the axis of the guide axis, and the angle formed between the plane and the inclined plane being an acute angle.

[0013] In some embodiments, the inner hole of the locking sleeve is a stepped hole, which slidably connects the large diameter section and the small diameter section, and the slider is integrally disposed on the step of the stepped hole and faces the large diameter section.

[0014] In some embodiments, the number of guide grooves is two and they are centrally symmetrically distributed on the large diameter section, and the number of sliders is two and they are centrally symmetrically distributed on the steps of the stepped hole.

[0015] In some embodiments, the hinge seat is provided with an L-shaped bracket, the guide shaft is fixed on the L-shaped bracket, and the L-shaped bracket is provided with a return spring for driving the locking sleeve to reset and lock the connecting pin.

[0016] In some embodiments, the hinge seat is provided with a mounting groove through which the connecting pin passes, and an elastic element for driving the connecting pin to move upward is provided in the mounting groove.

[0017] In some embodiments, a sliding block is slidably connected within the mounting groove, and when the locking sleeve disengages from the connecting pin, the elastic element pushes the sliding block to drive the connecting pin to move upward.

[0018] The beneficial effects of the technical solution provided in this application include:

[0019] This application provides an engine hood hinge device, including a hinge structure and a locking structure. The hinge structure includes a hinge seat for fixed connection with the vehicle body, a hinge hinge rotatably connected to the hinge seat, and a hinge arm rotatably connected to the hinge hinge and for fixed connection with the engine hood. The hinge hinge is provided with a connecting pin.

[0020] Since the locking structure includes a guide shaft and a locking sleeve sleeved on the guide shaft, one end of the connecting pin extends into the locking sleeve. The relative rotation of the locking sleeve and the guide shaft can drive the locking sleeve to move axially along the guide shaft, so as to lock or unlock the connecting pin.

[0021] Therefore, when the locking sleeve locks the connecting pin, the hinge hinge and the hinge seat can remain relatively stationary. The hinge arm and the hinge hinge are rotatably connected, and the engine hood can be closed or flipped open normally. When the connecting pin on the hinge seat is locked by the locking sleeve, the inner wall of the locking sleeve fits against the outer circumference of the limiting connecting pin to achieve circumferential limiting of the connecting pin. This ensures that the locking structure limits the connecting pin more firmly and stably when locked, avoiding problems such as unstable limiting of the hinge hinge and the hinge seat, shaking, and abnormal noise. At the same time, axial movement is achieved through the rotation of the locking sleeve, ultimately achieving locking and separation with the connecting pin. It has the advantages of good locking stability, small space required for separation, and a robust and reliable structural design. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the structure of an embodiment of this application;

[0024] Figure 2 for Figure 1 Structural cross-sectional view at point AA;

[0025] Figure 3 This is a schematic diagram of the guide shaft according to an embodiment of this application;

[0026] Figure 4 This is a schematic diagram of the connection between the lock sleeve and the worm gear according to an embodiment of this application;

[0027] Figure 5 This is a schematic diagram of the exploded structure of an embodiment of this application;

[0028] Figure 6 This is a schematic diagram illustrating an embodiment of this application;

[0029] Figure 7 for Figure 6 A magnified view of a section at point B in the middle.

[0030] The attached diagram lists the components represented by each number as follows:

[0031] 11. Hinge arm; 12. First bushing; 13. First pin; 21. Connecting pin; 22. Hinge hinge; 23. Hinge seat; 24. Second bushing; 25. Second pin; 26. Mounting bracket; 27. L-shaped bracket; 31. Sliding block; 32. Guide shaft; 33. Worm gear; 34. Return spring; 35. Elastic element; 36. Worm; 37. Motor. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0033] This application provides an engine hood hinge device that solves the problem in related technologies where the locking structure has a small contact surface with the connecting pin when locked, resulting in the locking structure not firmly restricting the connecting pin when locked, which leads to the hinge easily shaking and making abnormal noise.

[0034] See Figures 1 to 7 As shown, this application embodiment provides an engine hood hinge device, including:

[0035] The hinge structure includes a hinge seat 23 for fixed connection with the vehicle body, a hinge hinge 22 rotatably connected to the hinge seat 23, and a hinge arm 11 rotatably connected to the hinge hinge 22 and for fixed connection with the engine hood. The hinge hinge 22 is provided with a connecting pin 21.

[0036] The locking structure includes a guide shaft 32 and a locking sleeve sleeved on the guide shaft 32. One end of the connecting pin 21 extends into the locking sleeve. The relative rotation of the locking sleeve and the guide shaft 32 can drive the locking sleeve to move axially along the guide shaft 32 to lock or unlock the connecting pin 21.

[0037] The engine hood hinge device of this application embodiment includes a hinge structure and a locking structure. The hinge structure includes a hinge seat 23, a hinge hinge 22, and a hinge arm 11. The hinge arm 11 is bolted to the engine hood. The rear part of the hinge arm 11 is riveted to the hinge hinge 22 by a first pin 13. A first bushing 12 is sleeved on the outer side of the first pin 13 to ensure that the hinge arm 11 and the hinge hinge 22 can rotate relative to each other.

[0038] The hinge seat 23 is riveted to the hinge hinge 22 at the front by a second pin 25. A second bushing 24 is sleeved on the outside of the second pin 25 to ensure that the hinge hinge 22 and the hinge seat 23 can rotate relative to each other. The hinge seat 23 has a mounting hole at the bottom for easy connection with the vehicle body bolts. The locking structure includes a guide shaft 32 and a locking sleeve sleeved on the guide shaft 32. One end of the connecting pin 21 extends into the locking sleeve. The relative rotation of the locking sleeve and the guide shaft 32 can drive the locking sleeve to move axially along the guide shaft 32 to lock or unlock the connecting pin 21.

[0039] Specifically, when the locking sleeve locks the connecting pin 21, the hinge hinge 22 and the hinge seat 23 can remain relatively stationary due to the constraints of the second pin 25 and the connecting pin 21. The hinge arm 11 and the hinge hinge 22 can rotate relative to each other through the first pin 13, allowing the engine hood to close or flip open normally. Because the inner wall of the locking sleeve adheres to and limits the outer circumference of the connecting pin 21 when the connecting pin 21 on the hinge seat 23 is locked, this ensures that the locking structure provides a more secure and stable limit on the connecting pin 21 during locking. This is more secure and stable than the sliding block limit in patent CN113431455B, avoiding problems such as unstable limiting, shaking, and abnormal noise of the hinge hinge 22 and hinge seat 23. Simultaneously, the rotation of the locking sleeve enables axial movement, ultimately achieving locking and disengagement from the connecting pin 21. This design offers advantages such as good locking stability, small space required for disengagement, and a robust and reliable structural solution.

[0040] In some alternative embodiments: see Figures 1 to 7 As shown, this application embodiment provides an engine hood hinge device. The hinge seat 23 of the engine hood hinge device is provided with a mounting bracket 26. The outer ring of the locking sleeve is integrally connected with a worm gear 33. The locking structure also includes a motor 37 mounted on the mounting bracket 26, and a worm 36 connected to the motor 37 and used to drive the worm gear 33 to rotate.

[0041] In this embodiment, the locking sleeve and worm gear 33 are integrally formed. The motor 37 drives the worm 36 to rotate, and the worm 36 drives the worm gear 33 to rotate, which can realize the forward and reverse rotation of the worm gear 33. At the same time, the worm gear 33 and the worm 36 can achieve self-locking, that is, only the worm 36 can actively drive the worm gear 33, which ensures the stability and firmness of the locking sleeve after locking the connecting pin 21.

[0042] In this embodiment, the motor 37 is mounted on the hinge seat 23 via the mounting bracket 26, which improves the modularity of the components and facilitates the quick installation of the engine hood hinge device as a whole.

[0043] In some alternative embodiments: see Figures 1 to 7 As shown, this application embodiment provides an engine hood hinge device. The guide shaft 32 of the engine hood hinge device is provided with a guide groove, and a slider that cooperates with the guide groove is provided on the inner side of the locking sleeve. The guide groove has an inclined surface that guides the slider to move axially along the guide shaft 32.

[0044] In this embodiment, the guide groove on the guide shaft 32 and the slider on the lock sleeve cooperate with each other. The slider is located in the guide groove and can move along the inclined surface on the guide groove so that the lock sleeve can move axially when it rotates, and finally achieve locking and separation with the connecting pin 21. It has the advantages of good locking stability, small space required for separation, and a robust and reliable structural solution. Compared with the detonator solution, this application has a simple structure and low cost.

[0045] Specifically, when it is necessary to unlock the connecting pin 21, the motor 37 drives the worm 36 to rotate, the worm 36 drives the worm wheel 33 to rotate, and the worm wheel 33 drives the locking sleeve to rotate around the guide shaft 32. The slider on the locking sleeve slides along the inclined surface on the guide groove, causing the locking sleeve to move axially along the guide shaft 32 and away from the connecting pin 21. The locking sleeve disengages from the connecting pin 21, thereby unlocking the connecting pin 21. It has the advantages of fast unlocking, small locking operation space, simple structure, and low cost.

[0046] In this embodiment, the guide shaft 32 is fixed and cannot be rotated. The axis of the guide shaft 32 is parallel to the axis of the connecting pin 21. The guide shaft 32 can be fixed on the hinge seat 23 by a bracket or on the vehicle body by a support.

[0047] In some alternative embodiments: see Figures 1 to 7 As shown, this application embodiment provides an engine hood hinge device. The guide shaft 32 of the engine hood hinge device includes a large-diameter section and a small-diameter section coaxially arranged. The locking sleeve is sleeved on the large-diameter section and slidably connected to the large-diameter section. The guide groove is located on the large-diameter section and the groove opening faces the small-diameter section.

[0048] In this embodiment, the guide shaft 32 is a stepped shaft, comprising a large-diameter section and a small-diameter section coaxially arranged. A locking sleeve is fitted onto the large-diameter section of the guide shaft 32 and can rotate or slide around the surface of the large-diameter section. A guide groove is formed on the large-diameter section with its opening facing the small-diameter section. The locking sleeve can drive the slider to move out of or into the guide groove. The shoulder annular surface between the large-diameter and small-diameter sections can axially limit the slider, and the guide groove can also axially limit the slider. Therefore, the locking sleeve can be located at two different axial positions on the guide shaft 32, corresponding to the unlocked and locked positions of the locking sleeve.

[0049] Specifically, when the locking sleeve locks the connecting pin 21, the slider inside the locking sleeve is located in the guide groove on the guide shaft 32. When the locking sleeve needs to unlock the connecting pin 21 in this state, the motor 37 drives the worm 36 to rotate, the worm 36 drives the worm wheel 33 to rotate, and the worm wheel 33 drives the locking sleeve to rotate. The slider inside the locking sleeve slides along the inclined surface of the guide groove to the shoulder ring surface between the large diameter section and the small diameter section. The slider abuts against the shoulder ring surface and remains there. At the same time, the locking sleeve axially disengages from the connecting pin 21, thereby unlocking the connecting pin 21.

[0050] In some alternative embodiments: see Figures 1 to 7 As shown, this application embodiment provides an engine hood hinge device. The guide groove of the engine hood hinge device has a plane that restricts the slider to move circumferentially around the guide shaft 32. The plane is parallel to the axis of the guide shaft 32, and the angle formed by the plane and the inclined plane is an acute angle.

[0051] In addition to the inclined surface that guides the slider to move axially along the guide shaft 32, the guide groove of this application embodiment also has a plane that restricts the slider to move circumferentially around the guide shaft 32. The plane is parallel to the axis of the guide shaft 32. When the locking sleeve locks the connecting pin 21, the slider abuts against the plane, so that the locking sleeve is kept in the locked position.

[0052] In addition, in this embodiment, the angle formed by the plane and the inclined plane is an acute angle, which ensures that the slider can slide out or into the guide groove along the inclined plane, so that when the solid line locking sleeve rotates around the guide shaft 32, it can drive the locking sleeve to move axially along the guide shaft 32.

[0053] Specifically, when the locking sleeve unlocks the connecting pin 21, the slider inside the locking sleeve abuts against the shoulder ring surface between the large and small diameter sections of the guide shaft 32. In this state, when the locking sleeve needs to lock the connecting pin 21, the locking sleeve is rotated, causing the slider inside the locking sleeve to slide along the shoulder ring surface to the guide groove opening. The slider slides into the guide groove along the inclined surface on the guide groove. When the slider contacts the plane on the guide groove, the sliding stops, and the locking sleeve is in the locked position, keeping the connecting pin 21 locked.

[0054] In some alternative embodiments: see Figures 1 to 7 As shown in the figure, this application embodiment provides an engine hood hinge device. The inner hole of the locking sleeve of the engine hood hinge device is a stepped hole. The stepped hole slidably connects the large diameter section and the small diameter section. The slider is integrally set on the step of the stepped hole and faces the large diameter section.

[0055] The inner hole of the lock sleeve in this embodiment is a stepped hole. The stepped hole can better slide and adapt to the large diameter section and the small diameter section of the guide shaft 32. The slider is integrally set on the step of the stepped hole and faces the large diameter section. When the lock sleeve locks the connecting pin 21, the stepped annular surface of the stepped hole abuts against the shoulder annular surface between the large diameter section and the small diameter section, ensuring that the position of the lock sleeve is more firm and stable, and avoiding the lock sleeve from shaking and abnormal noise due to unstable positioning.

[0056] In some alternative embodiments: see Figures 1 to 7 As shown, this application embodiment provides an engine hood hinge device, which has two guide grooves that are centrally symmetrically distributed on the large diameter section, and two sliders that are centrally symmetrically distributed on the steps of the stepped hole.

[0057] In this embodiment, there are two guide grooves that are centrally symmetrically distributed on the large diameter section of the guide shaft 32, and two corresponding sliders that are centrally symmetrically distributed on the steps of the stepped hole of the lock sleeve. Since the two sliders and the two guide grooves are centrally symmetrically arranged, the sliders in the two guide grooves can be exchanged when the lock sleeve rotates 180 degrees, ensuring that the connecting pin 21 can be unlocked or locked even when the lock sleeve rotates in one direction. At the same time, the unlocking and locking strokes are shortened, which has the advantage of fast switching between the lock sleeve locking state and the lock sleeve unlocking state.

[0058] Specifically, when the lock sleeve is in the locked position, the stepped annular surface of the stepped hole on the lock sleeve abuts against the shoulder annular surface between the large-diameter and small-diameter sections of the guide shaft 32. Simultaneously, the two sliders inside the lock sleeve are located in the two guide grooves on the guide shaft 32. When the lock sleeve drives the sliders to rotate, the sliders slide out of the guide grooves along the inclined surfaces and move to the shoulder annular surface, placing the lock sleeve in the locked / unlocked position. When the lock sleeve continues to rotate to the 180-degree position, the sliders on both sides alternate positions and slide into the guide grooves, causing the lock sleeve to return to the locked position.

[0059] In some alternative embodiments: see Figures 1 to 7 As shown, this application embodiment provides an engine hood hinge device. The hinge seat 23 of the engine hood hinge device is provided with an L-shaped bracket 27, the guide shaft 32 is fixed on the L-shaped bracket 27, and the L-shaped bracket 27 is provided with a return spring 34 for driving the lock sleeve reset locking connecting pin 21.

[0060] An L-shaped bracket 27 is provided on the hinge seat 23 of this application embodiment. The small diameter section of the guide shaft 32 is fixed on the L-shaped bracket 27, and the large diameter section of the guide shaft 32 faces the hinge seat 23. A return spring 34 is installed between the L-shaped bracket 27 and the lock sleeve, which is fitted on the small diameter section of the guide shaft 32. When the lock sleeve is in the unlocked position, the return spring 34 is in a compressed state. During the process of the lock sleeve moving from the unlocked position to the locked position, the return spring 34 can push the lock sleeve to reset so as to assist the lock sleeve in locking the connecting pin 21.

[0061] Specifically, when the locking sleeve locks the connecting pin 21, the slider inside the locking sleeve is located in the guide groove on the guide shaft 32. When the locking sleeve needs to unlock the connecting pin 21 in this state, the motor 37 drives the worm 36 to rotate, the worm 36 drives the worm wheel 33 to rotate, and the worm wheel 33 drives the locking sleeve to rotate. The slider inside the locking sleeve slides along the inclined surface of the guide groove to the shoulder ring surface between the large diameter section and the small diameter section. The slider abuts against the shoulder ring surface and remains there. The locking sleeve moves axially away from the connecting pin 21, the return spring 34 is compressed, and at the same time, the locking sleeve moves axially away from the connecting pin 21, thereby unlocking the connecting pin 21.

[0062] When the locking sleeve needs to be reset and the connecting pin 21 needs to be locked in the above state, the locking sleeve that has a transmission relationship with it continues to rotate through the motor 37, so that the slider on the inner side of the locking sleeve slides along the shoulder ring surface to the groove position of the guide groove. Under the action of the reset spring 34, the reset spring 34 pushes the locking sleeve to drive the slider to slide into the guide groove along the inclined surface on the guide groove. When the slider contacts the plane on the guide groove, the sliding stops, and at the same time the locking sleeve resets to the locking position, keeping the connecting pin 21 locked.

[0063] In some alternative embodiments: see Figures 1 to 7 As shown, this application embodiment provides an engine hood hinge device. The hinge seat 23 of the engine hood hinge device is provided with a mounting groove for the connecting pin 21 to pass through, and an elastic member 35 for driving the connecting pin 21 to move upward is provided in the mounting groove.

[0064] The hinge seat 23 of this embodiment has a mounting groove through which the connecting pin 21 passes. An elastic element 35, which can be a spring, is installed in the mounting groove to drive the connecting pin 21 upwards. When the locking structure unlocks the connecting pin 21, the spring activates, first lifting the engine hood to a certain height, and then collapsing it downwards a certain distance during the collision. This significantly increases the energy absorption space during the collision. Simultaneously, the hinge seat 23 has an internal spring design that buffers and absorbs energy during a head impact, resulting in better energy absorption compared to a no-travel collision. The spring's elastic coefficient can be adjusted based on computer simulation results to achieve optimal energy absorption and reduce head impact injury.

[0065] Specifically, when a car is about to hit a pedestrian, the car transmits a signal to the car ECU through one or more sensors. After the ECU analyzes and judges the signal, it sends an electrical signal to the motor 37. The motor 37 drives the worm gear 36 to rotate, which in turn drives the worm wheel 33 to rotate the locking sleeve around the guide shaft 32. The locking sleeve and the guide shaft 32 are designed with two sliders and guides arranged around the shaft, which cooperate with each other.

[0066] When the locking sleeve rotates relative to the guide shaft 32, the slider of the locking sleeve slides on the inclined surface of the guide groove of the guide shaft 32, pushing the locking sleeve to move axially relative to the guide shaft 32 until the slider of the locking sleeve completely slides out of the guide groove (see the double-dotted line in the cross-sectional view AA). At this time, the axial movement of the locking sleeve is the projected length H of the inclined surface in the radial direction of the guide shaft 32. Before the slider moves out of the guide groove, the engagement length between the locking sleeve and the connecting pin 21 is less than H. When the locking sleeve moves axially by H, the locking sleeve completely disengages from the connecting pin 21. The disconnected connecting pin 21, under the push of the elastic element 35, instantly springs upward along the mounting groove, driving the hinge 22 to rotate around the second pin 25, thus realizing the pop-up of the engine hood (see...). Figure 6 and Figure 7 .

[0067] The above process is completed after recognizing that a pedestrian is about to be hit, but before the pedestrian's head collides with the engine hood. In this way, when the pedestrian's head hits the rear of the engine hood, the engine hood and the hard points of the vehicle body increase the buffer space, and during the downward collapse of the engine hood, the hinge 22 compresses the elastic element 35 to achieve full energy absorption, minimizing the head injury value and protecting the pedestrian.

[0068] Compared with existing technologies, the hinge springs up and has an internal elastic element 35, which allows for a larger buffer space and better energy absorption. After a collision, the components are less likely to be damaged. The hinge can be restored simply by aligning the connecting pin 21 with the center of the locking sleeve and then resetting the locking sleeve so that the locking sleeve and the connecting pin 21 are engaged and limited. This has the advantages of convenient recovery after a collision, no need to replace parts, and low after-sales maintenance costs.

[0069] In some alternative embodiments: see Figures 1 to 7 As shown, this application embodiment provides an engine hood hinge device. A sliding block 31 is slidably connected in the mounting groove of the engine hood hinge device. When the locking sleeve disengages from the connecting pin 21, the elastic member 35 pushes the sliding block 31 to drive the connecting pin 21 to move upward.

[0070] In this embodiment, a sliding block 31 is provided between the elastic element 35 and the connecting pin 21 to ensure that when the connecting pin 21 is unlocked, the elastic element 35 can quickly and stably lift the connecting pin 21 through the sliding block 31. Specifically, the sliding block 31 can slide along the longitudinal direction of the mounting groove. Since the connecting pin 21 rotates around the second pin shaft 25 with the hinge 22, the connecting pin 21 has a horizontal displacement during the upward movement and will slide along the surface of the sliding block 31. Therefore, the width of the mounting groove is greater than the diameter of the connecting pin 21, thereby ensuring that the elastic element 35 can push the sliding block 31 to stably support the connecting pin 21 to move upward, so as to realize the rapid pop-up of the engine hood.

[0071] In the description of this application, it should be noted that the terms "upper," "lower," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0072] It should be noted that in this application, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0073] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. An engine hood hinge device, characterized in that, include: The hinge structure includes a hinge seat (23) for fixed connection with the vehicle body, a hinge hinge (22) rotatably connected to the hinge seat (23), and a hinge arm (11) rotatably connected to the hinge hinge (22) and for fixed connection with the engine hood. The hinge hinge (22) is provided with a connecting pin (21). The locking structure includes a guide shaft (32) and a locking sleeve sleeved on the guide shaft (32). One end of the connecting pin (21) extends into the locking sleeve. The relative rotation of the locking sleeve and the guide shaft (32) can drive the locking sleeve to move axially along the guide shaft (32) to lock or unlock the connecting pin (21). An L-shaped bracket (27) is provided on the hinge seat (23), and the guide shaft (32) is fixed on the L-shaped bracket (27). A return spring (34) for driving the locking sleeve to reset and lock the connecting pin (21) is provided on the L-shaped bracket (27).

2. The engine hood hinge device as described in claim 1, characterized in that: The hinge seat (23) is provided with a mounting bracket (26), the outer ring of the lock sleeve is integrally connected with a worm gear (33), the locking structure also includes a motor (37) mounted on the mounting bracket (26), and a worm (36) connected to the motor (37) and used to drive the worm gear (33) to rotate.

3. The engine hood hinge device as described in claim 2, characterized in that: The guide shaft (32) is provided with a guide groove, and the inner side of the lock sleeve is provided with a slider that cooperates with the guide groove. The guide groove has an inclined surface that guides the slider to move axially along the guide shaft (32).

4. The engine hood hinge device as described in claim 3, characterized in that: The guide shaft (32) includes a large diameter section and a small diameter section arranged coaxially. The locking sleeve is fitted on the large diameter section and slidably connected to the large diameter section. The guide groove is located on the large diameter section and the groove opening faces the small diameter section.

5. The engine hood hinge device as described in claim 4, characterized in that: The guide groove has a plane that restricts the slider to move circumferentially around the guide shaft (32), the plane is parallel to the axis of the guide shaft (32), and the angle formed by the plane and the inclined plane is an acute angle.

6. The engine hood hinge device as described in claim 4, characterized in that: The inner hole of the lock sleeve is a stepped hole, which slidably connects the large diameter section and the small diameter section. The slider is integrally set on the step of the stepped hole and faces the large diameter section.

7. The engine hood hinge device as described in claim 6, characterized in that: The number of guide grooves is two and they are centrally symmetrically distributed on the large diameter section, and the number of sliders is two and they are centrally symmetrically distributed on the steps of the stepped hole.

8. The engine hood hinge device as described in claim 1, characterized in that: The hinge seat (23) is provided with a mounting groove through which the connecting pin (21) passes, and an elastic element (35) for driving the connecting pin (21) to move upward is provided in the mounting groove.

9. The engine hood hinge device as described in claim 8, characterized in that: A sliding block (31) is slidably connected in the mounting groove. When the locking sleeve disengages from the connecting pin (21), the elastic element (35) pushes the sliding block (31) to drive the connecting pin (21) to move upward.

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