A hinge support and limiting mechanism applicable to various types of window cover structures

Abstract

This invention discloses a hinge support and limiting mechanism applicable to various types of window cover structures, including a lock body assembly and a hinge assembly. The hinge assembly includes an upper connecting seat and a lower connecting seat, which are hinged together by a rotating shaft. The upper connecting seat has an abutment at its bottom front end, which cooperates with a limiting plate on the lower connecting seat to limit the engine hood in the opening direction; the upper connecting seat has a latch at its bottom rear end. The lock body assembly includes a lock shell, a pawl, and a preload spring. When the engine hood is rotated to the open setting position, the pawl abuts and limits the latch, preventing it from moving in the closing direction. Simultaneously, the limiting plate supports the abutment of the upper connecting seat, restricting the engine hood from moving in the opening direction, allowing the engine hood to maintain its open state and remain stationary without the need for a strut. This hinge support and limiting mechanism automatically limits the engine hood in both the opening and closing directions when it is opened to the designed position, making it easy to operate and requiring little space.

Description

Technical Field

[0001] This invention belongs to the field of vehicle cover lock technology, and more specifically, relates to a hinge support and limiting mechanism applicable to various types of window cover structures. Background Technology

[0002] For off-road vehicles with a one-piece, front-tilting hood, the hood is large and heavy. Once opened, the hood is typically secured by mechanical struts or cables. Operating this requires one hand to support the hood and the other to operate the mechanical struts, making it inconvenient and uncomfortable.

[0003] To ensure safety, the engine hood needs to be limited in both opening and closing directions to prevent it from moving freely to either side in abnormal situations. This requires multiple limiting structures, such as struts and cables, to achieve the above requirements. This results in a complex structure that occupies a large amount of space and sacrifices space in the engine compartment.

[0004] Therefore, there is an urgent need for a hinge support and limiting mechanism applicable to various types of window cover structures. This mechanism can limit the opening of the engine hood without requiring the operation of mechanical struts during the opening process. It automatically limits the opening when the engine hood reaches the designed position and can limit the opening in both the opening and closing directions. It has the advantages of convenient operation and small space occupation. Summary of the Invention

[0005] To address the problems of complex and space-consuming mechanisms in existing front-opening engine hood support systems, this invention provides a hinge support limiting mechanism applicable to various window cover structures to solve these issues.

[0006] To achieve the aforementioned objective, the present invention provides a hinge support and limiting mechanism applicable to various types of window cover structures, comprising a lock body assembly, including an upper connecting seat fixedly connected to the bottom front end of the engine hood, and a lower connecting seat fixedly connected to the front end of the vehicle frame, the two being hinged together by a rotating shaft; the upper connecting seat has an abutment portion at its bottom front end and a locking tongue at its bottom rear end; a limiting plate is fixedly mounted on the lower connecting seat; and a lock body assembly including a lock housing fixed to the side of the lower connecting seat, a pawl rotatably disposed within the lock housing, a preload spring providing preload force for the pawl rotation, a cable connected to the upper end of the pawl, and a first limiting stud and a second limiting stud respectively limiting the rotation path of the pawl. Two limiting studs; the second limiting stud limits the pawl, stopping it in the locked position, and cooperates with the latch to restrict the engine hood from rotating in the closing direction; the first limiting stud limits the pawl, stopping it in the unlocked position, separating the pawl from the latch and unlocking it; when the engine hood rotates to the set open position, the upper connecting seat drives the abutment part to abut against the limiting plate, restricting the engine hood from rotating in the opening direction, the latch rotates to the top of the pawl, and the pawl moves to the bottom of the latch under the pull of the pre-tension spring, its top abutting against the latch, and its bottom abutting against the second limiting stud, thereby restricting the engine hood from rotating in the closing direction, so that the engine hood remains stably stationary in the set open position.

[0007] Furthermore, the center of the pawl is rotatably connected to the fixed pin, which is fixedly installed inside the lock housing; one end of the preload spring is fixedly connected to the upper end of the pawl, and the other end is fixed below the pawl; when the fixed pin and the two ends of the preload spring are in the same straight line, the straight line constitutes the critical axis of deflection of the pawl.

[0008] Furthermore, the engine hood rotates from the closed position to the open set position, and the locking tongue pushes the pawl to rotate counterclockwise from the locked position. After rotating by an angle C, it disengages from the pawl, and its bottom and the top of the pawl are at the same horizontal height. Under the pull of the preload spring, the locking head rotates and slides under the locking tongue. The range of the rotation angle C is: C < A; the angle A is the angle between the pawl in the locked position and the deflection critical axis.

[0009] Furthermore, the cable pulls the pawl to unlock, and through its pulling stroke, the pawl rotates by an angle D. After the cable (13) pulls the pawl (12) to unlock, the pawl is stably held in the unlocked position under the action of the pre-tightening spring (15). The range of the rotation angle D is: A<D≤A+B. The angle B is the angle between the pawl in the unlocked position and the deflection critical axis.

[0010] Furthermore, during the process of closing the engine hood (3), the locking tongue pushes the pawl located in the unlocked position to rotate clockwise, and after rotating by an angle E, it disengages from the locking tail. The range of the rotation angle E is B < E < A + B.

[0011] Furthermore, the pawl is an L-shaped structural component, which, through the engagement of a locking head, a locking middle section, and a locking tail section with the locking tongue, achieves the limitation of the engine hood closing direction; the locking head is an arc-shaped structure.

[0012] Furthermore, the latch has an outer side, an inner side, and a bottom end; wherein the inner side is an arc-shaped structure, the curvature of which is adapted to the locking head; the bottom end is an arc-shaped structure, and the connection between it and the outer side is rounded.

[0013] Furthermore, the other end of the cable is connected to a control handle located inside the vehicle cabin for the driver to unlock, and a protective tube is fitted on its outer side; one end of the protective tube is fixed to a bayonet located at the rear end of the lock housing.

[0014] Furthermore, the lower connecting seat includes a base plate and a support plate assembly vertically fixed to the top of the base plate; the base plate is fixed to the front end of the vehicle frame by bolts; the upper end of the support plate assembly has a rotating hole, and the rotating shaft passes through the rotating hole to realize the hinge connection between the lower connecting seat and the upper connecting seat; the support plate assembly includes an inner support plate and an outer support plate, and the outer side of the inner support plate is respectively provided with a first flange hole and a second flange hole, and bolts are threadedly connected to the first limit stud and the second limit stud after passing through the first flange hole and the second flange hole, thereby fixing the lock shell to the side of the lower connecting seat.

[0015] Furthermore, the upper connecting seat includes a top plate and a rotating plate assembly vertically fixed at the bottom of the top plate; the top plate is fixed to the bottom front end of the engine hood by bolts; the rotating plate assembly includes an inner rotating plate and an outer rotating plate; the bottom front end of the inner rotating plate is fixedly provided with an abutment part, and the bottom rear end is fixedly provided with a locking tongue.

[0016] In summary, compared with the prior art, the above-described technical solutions conceived by this invention can achieve the following beneficial effects:

[0017] 1. The hinge support limiting mechanism of the present invention automatically limits the engine hood when it is opened to the designed position. The limiting plate supports the abutment part of the upper connecting seat, restricting the movement of the engine hood in the opening direction. The locking head of the pawl abuts against the inner side of the locking tongue, restricting the rotation of the locking tongue in the closing direction of the engine hood. This allows the engine hood to maintain its open state and remain stationary without the need for a support rod, making it convenient to use and improving the comfort of operation.

[0018] 2. The hinge support limiting mechanism of the present invention is small in size and does not require much space in the engine compartment. At the same time, the lock assembly is fixed on the hinge assembly. Only the operating handle and cable need to be fixed in a suitable position in the engine compartment. There is no need to consider the assembly structure of the hand-held support rod, the fixed structure of the retractable part, the motion envelope, etc., which greatly reduces the number of parts and effectively reduces the overall cost of the vehicle. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of a hinge support and limiting mechanism applicable to various types of window cover structures in an embodiment of the present invention;

[0020] Figure 2 This is an exploded view of the supporting and limiting mechanism in an embodiment of the present invention;

[0021] Figure 3 This is an exploded view of the lock body assembly in an embodiment of the present invention;

[0022] Figure 4 This is a schematic diagram of the hinge assembly in an embodiment of the present invention;

[0023] Figure 5 This is a schematic diagram of the state of the support and limiting mechanism when the engine hood is closed in an embodiment of the present invention;

[0024] Figure 6 This is a schematic diagram of the state of the support and limiting mechanism when the engine hood is opened in an embodiment of the present invention;

[0025] Figure 7 This is a schematic diagram showing the state in which the supporting and limiting mechanism supports the engine hood in an embodiment of the present invention;

[0026] Figure 8 This is a schematic diagram showing the engagement state of the pawl and the locking tongue when the engine hood is open and supported in an embodiment of the present invention.

[0027] Figure 9 This is a schematic diagram illustrating the state of the cable pulling the pawl in an embodiment of the present invention;

[0028] Figure 10 This is a schematic diagram showing the engagement state of the pawl and the locking tongue during the engine hood closing process in an embodiment of the present invention;

[0029] Figure 11 This is a schematic diagram illustrating the locking state where the locking tongue pushes the pawl to rotate during the engine hood closing process in an embodiment of the present invention;

[0030] Figure 12 This is a schematic diagram of the structure when the engine hood is in the open state in an embodiment of the present invention;

[0031] Figure 13 This is a schematic diagram of the structure when the engine hood is in a closed state in an embodiment of the present invention.

[0032] In all the accompanying drawings, the same reference numerals denote the same technical features, specifically:

[0033] 1-Lock body assembly, including: 11-Lock housing, 111-First housing, 1111-First limiting stud, 1112-Second limiting stud, 1113-Spring connecting post, 112-Second housing, 1121-First limiting hole, 1121-Second limiting hole, 1123-Third limiting hole, 12-Pawl, 121-Locking head, 122-Locking middle part, 123-Locking tail part, 124-Connecting pin, 13-Pull cable, 14-Fixing pin, 15-Preload spring.

[0034] 2-Hinge assembly, 21-Lower connecting seat, 211-Base plate, 212-Inner support plate, 213-Outer support plate, 214-First flange hole, 215-Second flange hole, 22-Upper connecting seat, 221-Top plate, 222-Inner rotating plate, 223-Outer rotating plate, 224-Abutting part, 23-Rotating shaft, 24-Lock tongue, 241-Outer part, 242-Inner part, 243-Bottom end, 25-Limiting plate;

[0035] 3- Engine hood. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention. Furthermore, the technical features involved in the various embodiments of this invention described below can be combined with each other as long as they do not conflict with each other.

[0037] like Figure 1-13As shown, the present invention provides a hinge support and limiting mechanism applicable to various types of window cover structures, including a lock body assembly 1 and a hinge assembly 2. The hinge assembly 2 includes an upper connecting seat 22 fixedly connected to the bottom front end of an engine hood 3, and a lower connecting seat 21 fixedly connected to the front end of a vehicle frame, the two being hinged together by a rotating shaft 23. The bottom front end of the upper connecting seat 22 is provided with an abutment portion 224, which cooperates with a limiting plate 25 provided on the lower connecting seat 21 to limit the engine hood 3 in the opening direction; the bottom rear end of the upper connecting seat 22 is provided with a locking tongue 24. The lock body assembly 1 includes a lock housing 11 fixed to the side of the lower connecting seat 21, a pawl 12 rotatably provided inside the lock housing 11, and a preload spring 15 providing preload force for the rotation of the pawl 12. When the engine hood 3 is opened to the set position, the pawl 12 abuts and limits the locking tongue 24, preventing it from moving in the closing direction. At the same time, the limiting plate 25 supports the abutment portion 224 of the upper connecting seat 22, restricting the movement of the engine hood 3 in the opening direction, so that the engine hood 3 can maintain the open state and remain stationary without the need for a support rod. The hinge support limiting mechanism of the present invention can automatically limit the engine hood 3 when it is opened to the set position, and can simultaneously limit the movement in both the opening and closing directions. It is easy to operate and occupies little space.

[0038] like Figure 1-2 As shown in Figure 4, in this embodiment of the invention, the hinge assembly 2 connects the engine hood 3 and the vehicle frame, allowing the engine hood 3 to rotate around the front end of the vehicle frame to open. It includes a lower connecting seat 21 and an upper connecting seat 22. The lower connecting seat 21 includes a base plate 211 and a support plate assembly vertically fixed to the top of the base plate 211. The base plate 211 is fixed to the front end of the vehicle frame by bolts. A rotating hole is provided at the upper end of the support plate assembly, through which the rotating shaft 23 passes to achieve the hinge connection between the lower connecting seat 21 and the upper connecting seat 22. Further, the support plate assembly includes an inner support plate 212 and an outer support plate 213. The outer side of the inner support plate 212 is provided with a first flange hole 213 and a second flange hole 214. Bolts passing through the first flange hole 213 and the second flange hole 214 can fix the lock body assembly 1 to one side of the lower connecting seat 21.

[0039] The upper connecting seat 22 includes a top plate 221 and a rotating plate assembly vertically fixed to the bottom of the top plate 221. The top plate 221 is fixed to the bottom front end of the engine hood 3 by bolts. The bottom of the rotating plate assembly is hinged to the top of the support plate assembly via a rotating shaft 23. It includes an inner rotating plate 222 and an outer rotating plate 223. The bottom front end of the inner rotating plate 222 is fixedly provided with an abutment part 224. When the engine hood 3 is opened to the designated position, the upper connecting seat 22 rotates accordingly, so that the abutment part 224 abuts against the top of the limiting plate 25, restricting the engine hood 3 from continuing to rotate in the opening direction. The bottom rear end of the inner rotating plate 222 is fixedly provided with a locking tongue 24, which has an outer part 241, an inner part 242 and a bottom end 243 that cooperate with the pawl 12 to prevent the engine hood 3 from moving in the closing direction.

[0040] like Figure 1-2 As shown in Figures 1 and 3, the lock body assembly 1 includes a lock housing 11, a pawl 12, a cable 13, and a preload spring 15.

[0041] The lock housing 11 includes a first housing 111 and a second housing 112. A first limiting stud 1111 is vertically fixed to the upper end of the inner wall of the first housing 111, and a spring connecting post 1113 and a second limiting stud 1112 are sequentially provided at the lower end of the inner wall. The first limiting stud 1111 and the second limiting stud 1112 are respectively provided with internal threads. A first limiting hole 1121, a second limiting hole 1121, and a third limiting hole are sequentially opened on the inner wall of the second housing 112. Holes 1123 are positioned to correspond to the first limiting stud 1111, the second limiting stud 1112, and the spring connecting post 1113, respectively. The first limiting stud 1111 and the second limiting stud 1112 pass through the first limiting hole 1121 and the second limiting hole 1121, respectively, and then connect to the first flange hole 214 and the second flange hole 215. The other end of the spring connecting post 1113 is located in the third limiting hole 1123 and is used to connect one end of the preload spring 15. When fixing the lock housing 11, the first limiting stud 1111, the second limiting stud 1112 and the spring connecting stud 1113 on the first housing 111 can be aligned and inserted into the first limiting hole 1121, the second limiting hole 1121 and the third limiting hole 1123 on the second housing 112 to achieve precise positioning and connection of the first housing 111 and the second housing 112. Then, the two sets of screws are threaded to the first limiting stud 1111 and the second limiting stud 1112 through the first flange hole 214 and the second flange hole 215 respectively, and the lock housing 11 is fixed to the side of the lower connecting seat 21.

[0042] The lock body assembly 1 also includes a fixing pin 14, which passes through a through hole in the center of the pawl 12 and is vertically fixed to the inner wall of the first housing 111. The pawl 12 can rotate around the fixing pin 14. Furthermore, the fixing pin 14 is located between the first limiting stud 1111 and the second limiting stud 1112, so that the first limiting stud 1111 and the second limiting stud 1112 limit the rotation range of the pawl 12.

[0043] The pawl 12 is an L-shaped structure, which, through a locking head 121, a locking middle part 122, and a locking tail part 123, cooperates with the locking tongue 24 to limit the closing direction of the engine hood 3. The preload spring 15 actively provides preload force to the pawl 12 to prevent the pawl 12 from swinging. One end of the spring is connected to the spring connecting post 1113, and the other end is connected to the connecting pin 124 provided on the pawl 12. Further, the connecting pin 124 is located above the through hole in the center of the pawl 12, and the spring connecting post 1113 is located below the fixed pin 14. When the three are in a straight line, this straight line constitutes the deflection critical axis of the pawl. When the pawl 12 rotates and deviates from the deflection critical axis, that is, when the axis of the preload spring 15 deviates from the rotation center of the pawl 12, the preload spring 15 applies a preload force in the deviated direction to the pawl 12 to prevent the pawl 12 from swinging back. When the pawl 12 deviates from the right side of the deflection critical axis, the preload spring 15 pulls the pawl 12 to rotate clockwise until the bottom of the pawl 12 abuts against the second limiting stud 1112, putting the pawl 12 in the locked position. It can cooperate with the locking tongue 24 to lock and limit the engine cover 3. At this time, the angle between the pawl 12 in the locked position and the deflection critical axis is A. When the pawl 12 deviates from the left side of the deflection critical axis, the preload spring 15 pulls the pawl 12 to rotate counterclockwise until the bottom of the pawl 12 abuts against the first limiting stud 1111, putting the pawl 12 in the unlocked position. It can completely disengage from the locking tongue 24, allowing the engine cover 3 to close. At this time, the angle between the pawl 12 in the unlocked position and the deflection critical axis is B.

[0044] One end of the cable 13 is connected to the upper end of the pawl 12, and the other end is connected to the control handle located in the vehicle cabin for the driver to unlock. Preferably, in order to prevent wear between the cable 13 and other components during the pulling process, a protective tube is provided on the outside of the cable 13, and one end of the protective tube is fixed to the bayonet provided at the rear end of the first housing 111.

[0045] like Figure 5As shown, when the engine hood 3 is in the fully closed state, the axis of the preload spring 15 is offset from the rotation center of the pawl 12, providing a downward preload force to the pawl 12, causing the pawl 12 to rotate clockwise, thereby pressing the locking center 122 against the outer side 241 of the locking tongue 24. The bottom of the pawl 12 abuts against the second limiting stud 1112, restricting the clockwise rotation of the pawl 12. Through the downward preload force provided by the preload spring 15 and the abutment of the second limiting stud 1112, the pawl 12 can be stably stopped in the locked position.

[0046] like Figure 6-8 As shown, during the process of opening and supporting the engine hood 3, the rear end of the front-flipping engine hood can be unlocked first, and the engine hood 3 can be flipped forward. The upper connecting seat 22 rotates clockwise, and the locking tongue 24 pushes the pawl 12 to rotate counterclockwise. When the engine hood 3 reaches the open setting position, the abutting part 224 of the upper connecting seat 22 abuts against the limiting plate 25. After the pawl 12 separates from the locking tongue 24, it is pulled by the pre-tension spring 15 to rotate clockwise until the bottom abuts against the second limiting stud 1112. At this time, the locking head 121 of the pawl 12 abuts against the inner side 242 of the locking tongue 24, restricting the locking tongue 24 from continuing to rotate, so that the engine hood 3 can be limited in both opening and closing directions without the need for longitudinal mechanical struts for support.

[0047] When the engine hood 3 is rotated from the closed position to the open position, the locking tongue 24 pushes the pawl 12 to rotate counterclockwise by an angle C from the locked position and disengage from the pawl 12. Its bottom and the top of the pawl 12 are at the same level. Under the pull of the preload spring 15, the locking head 121 rotates and slides into the inner part 242 to abut against it. The rotation angle C is in the range of C < A, which can prevent the pawl 12 from deviating from the deflection critical axis and rotating counterclockwise. Preferably, to ensure smoother operation of the pawl 12 and the locking tongue 24, the locking head 121 of the pawl 12 is an arc-shaped structure. The inner side 242 of the arc-shaped structure, which is centered on the fixed pin 14 and abuts against the locking head 121, is also an arc-shaped structure, and its curvature matches that of the locking head 121. The bottom end 243 is an arc-shaped structure, and the connection between it and the outer side 241 is rounded. This effectively reduces the friction generated when the locking tongue 24 pushes the pawl 12, and avoids the undesirable phenomenon of frictional self-locking between the two.

[0048] like Figure 9-11As shown, during the closing process of the engine hood 3, pulling the control handle located in the vehicle compartment causes the cable 13 to drive the pawl 12 to rotate backward, separating the pawl 12 from the locking tongue 24. After the pawl 12 deviates from the left side of the deflection critical axis, it is pulled counterclockwise by the preload spring 15 until its outer side abuts against the first limit stud 1111, allowing it to stop stably in the unlocked position, pushing the engine hood 3 to rotate in the closing direction. The inner side 242 of the locking tongue 24 pushes the locking tail 123 of the pawl 12 to rotate clockwise. After the pawl 12 deviates from the right side of the deflection critical axis, the preload spring 15 pulls the pawl 12 to rotate clockwise until it abuts against the second limit stud 1112.

[0049] During the closing process of the engine hood 3, the pulling stroke of the cable 13 can drive the pawl 12 to rotate by an angle D, the range of the rotation angle D is: A<D≤A+B; the locking tongue 24 pushes the pawl 12 in the unlocked position to rotate clockwise by an angle E and then disengages from the locking tail 123, the range of the rotation angle E is B<E<A+B.

[0050] like Figure 12-13 As shown, the lock assembly 1, hinge assembly 2 and engine hood 3 cooperate to realize the opening and closing function of engine hood 3. The hinge support limiting mechanism of this embodiment of the invention is small in size and does not need to occupy too much engine compartment space. At the same time, the lock assembly 1 is fixed on the hinge assembly 2. It is only necessary to fix the operating handle and cable 13 in a suitable position in the engine compartment. There is no need to consider the assembly structure of the hand-held support rod, the fixed structure after folding, the motion envelope, etc., which greatly reduces the number of parts and effectively reduces the overall cost of the vehicle.

[0051] The chain support limiting mechanism of the present invention can also be applied to various types of window cover structures to support and limit the window cover. It has a wide range of applications and great promotional value.

[0052] Those skilled in the art will readily understand that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A hinge support and limiting mechanism applicable to various types of window cover structures, characterized in that, include: The hinge assembly (2) includes an upper connecting seat (22) fixedly connected to the bottom front end of the engine hood (3) and a lower connecting seat (21) fixedly connected to the front end of the frame. The two are hinged together by a rotating shaft (23). The upper connecting seat (22) has an abutment part (224) at the bottom front end and a locking tongue (24) at the bottom rear end. A limiting plate (25) is fixedly provided on the lower connecting seat (21). The lock body assembly (1) includes a lock housing (11) fixed to the side of the lower connecting seat (21), a pawl (12) rotatably disposed in the lock housing (11), a preload spring (15) providing preload force for the rotation of the pawl (12), a cable (13) connected to the upper end of the pawl (12), and a first limiting stud (1111) and a second limiting stud (1112) that respectively limit the rotation path of the pawl (12); the second limiting stud (1112) limits the pawl (12) to stop it in the locked position, and cooperates with the lock tongue (24) to restrict the movement of the pawl towards the engine hood (3). The pawl (12) rotates in the closing direction; the first limiting stud (1111) limits the pawl (12) to stop in the unlock position, separating the pawl (12) from the lock tongue (24) and unlocking it; the center of the pawl (12) is rotatably connected to the fixed pin (14), and the fixed pin (14) is fixedly installed in the lock housing (11); one end of the preload spring (15) is fixedly connected to the upper end of the pawl (12), and the other end is fixed below the pawl (12); when the two ends of the fixed pin (14) and the preload spring (15) are in the same straight line, the straight line constitutes the critical axis of deflection of the pawl (12); When the engine hood (3) is rotated to the set open position, the upper connecting seat (22) drives the abutment part (224) to abut against the limiting plate (25), restricting the engine hood (3) from rotating in the opening direction. The locking tongue (24) rotates to the top of the pawl (12). The pawl (12) moves to the bottom of the locking tongue (24) under the pull of the preload spring (15). Its top abuts against the locking tongue (24), and its bottom abuts against the second limiting stud (1112), thereby restricting the engine hood (3) from rotating in the closing direction, so that the engine hood (3) remains stable in the set open position. When the engine hood (3) is rotated from the closed position to the open position, the latch (24) pushes the pawl (12) to rotate counterclockwise from the locked position. After rotating by an angle C, it disengages from the pawl (12), and its bottom is at the same level as the top of the pawl (12). Under the pull of the preload spring (15), the locking head (121) rotates and slides under the latch (24). The range of the rotation angle C is: C < A; the angle A is the angle between the pawl (12) in the locked position and the deflection critical axis.

2. The hinge support and limiting mechanism suitable for various window cover structures according to claim 1, wherein, The cable (13) pulls the pawl (12) to unlock it. Through its pulling stroke, the pawl (12) rotates by an angle D. After the cable (13) pulls the pawl (12) to unlock it, the pawl is stably held in the unlocked position under the action of the pre-tension spring (15). The range of the rotation angle D is: A<D≤A+B. The angle B is the angle between the pawl (12) in the unlocked position and the deflection critical axis.

3. The hinge support and limiting mechanism suitable for various window cover structures according to claim 2, wherein, During the process of closing the engine hood (3), the locking tongue (24) pushes the pawl (12) located in the unlock position to rotate clockwise. After rotating by an angle E, it disengages from the locking tail (123). The range of the rotation angle E is B < E < A + B.

4. The hinge support limiting mechanism suitable for various window cover structures according to any one of claims 1-3, characterized in that, The pawl (12) is an L-shaped structure, which is equipped with a locking head (121), a locking middle part (122) and a locking tail part (123) to cooperate with the locking tongue (24) to limit the closing direction of the engine hood (3); the locking head (121) is an arc-shaped structure.

5. The hinge support and limiting mechanism suitable for various window covering structures according to claim 4, wherein, The latch (24) is provided with an outer side (241), an inner side (242) and a bottom end (243); wherein, the inner side (242) is an arc-shaped structure, the curvature of which is adapted to the locking head (121); the bottom end (243) is an arc-shaped structure, and the connection between it and the outer side (241) is rounded.

6. The hinge support and limiting mechanism suitable for various window cover structures according to any one of claims 1-3, characterized in that, The other end of the cable (13) is connected to the control handle located in the cabin for the driver to unlock. A protective tube is fitted on its outer side; one end of the protective tube is fixed to a bayonet provided at the rear end of the lock housing (11).

7. The hinge support and limiting mechanism suitable for various window cover structures according to any one of claims 1-3, characterized in that, The lower connecting seat (21) includes a base plate (211) and a support plate assembly vertically fixed to the top of the base plate (211); the base plate (211) is fixed to the front end of the frame by bolts; the upper end of the support plate assembly has a rotating hole, and the rotating shaft (23) passes through the rotating hole to realize the hinge connection between the lower connecting seat (21) and the upper connecting seat (22); the support plate assembly includes an inner support plate (212) and an outer support plate (213), and the outer side of the inner support plate (212) is provided with a first flange hole (213) and a second flange hole (214), respectively. After the bolts pass through the first flange hole (213) and the second flange hole (214), they are threadedly connected to the first limiting stud (1111) and the second limiting stud (1112) to fix the lock shell (11) to the side of the lower connecting seat (21).

8. The hinge support and limiting mechanism suitable for various window covering structures according to claim 7, wherein, The upper connecting seat (22) includes a top plate (221) and a rotating plate assembly vertically fixed at the bottom of the top plate (221); the top plate is fixed to the bottom front end of the engine hood (3) by bolts; the rotating plate assembly includes an inner rotating plate (222) and an outer rotating plate (223); the bottom front end of the inner rotating plate (222) is fixedly provided with an abutment part (224), and the bottom rear end is fixedly provided with a locking tongue (24).

Images