A dual-pull hood latch and vehicle

Abstract

The present application relates to a double-pull engine hood lock, comprising a base plate, a lock tongue, a lock hook, a stopper, a connecting rod, a first return spring acting on the lock tongue, and a second return spring acting on the stopper or the lock hook, the lock tongue, the lock hook and the stopper are rotatably connected to the base plate respectively, the lock tongue is provided with ratchet teeth, the stopper is provided with first pawl teeth and second pawl teeth, the connecting rod is hingedly connected to the stopper and the lock hook respectively, and the connecting rod, the stopper, the lock hook and the base plate constitute a double-rocker mechanism; the double-pull engine hood lock has a full-locking state, a half-locking state and an unlocking state, the lock tongue has a first locking position, an intermediate position and a first unlocking position arranged in sequence, the lock hook has a second locking position and a second unlocking position, and the stopper has a first stop position and a second stop position. The present application also proposes a vehicle. The double-pull engine hood lock proposed by the present application helps to improve the opening height of the engine hood, and has the characteristics of simple structure and reliability.

Description

Technical Field

[0001] This invention relates to the field of automotive parts technology, specifically to a lamp cover, a headlight, and an automobile. Background Technology

[0002] Some vehicles use a double-pull hood lock. Pulling the unlocking lever once partially unlocks the hood lock, and pulling it a second time fully unlocks it. The existing double-pull hood lock has the following technical problems:

[0003] When some double-pull hood locks are in the half-lock position, the hood opening height is insufficient, and the driver cannot visually see the hood's locking status, which is detrimental to safe driving.

[0004] Some double-pull hood locks use microswitches to monitor their open / closed status. While this allows drivers to quickly identify the lock's position, it significantly increases the cost by requiring additional components such as microswitches and wiring harness connectors. For example, a double-pull hood lock and vehicle based on patent application CN202320145904.8 incorporates a microswitch, as does a double-pull hood lock based on patent application CN202321335388.1.

[0005] Some double-pull engine hood locks use complex transmission structures and a large number of spring components to achieve double-pull unlocking. On the one hand, this results in a large number of parts and a complex structure, and on the other hand, it also results in insufficient operational reliability. Summary of the Invention

[0006] The purpose of this invention is to provide a double-pull engine hood lock and vehicle to alleviate or eliminate at least one of the aforementioned technical problems.

[0007] The present invention discloses a double-pull engine hood lock, comprising a base plate, a latch, a hook, a stop, a connecting rod, a first return spring acting on the latch, and a second return spring acting on the stop or the hook. The latch, the hook, and the stop are rotatably connected to the base plate. The latch is provided with ratchet teeth, and the stop is provided with a first pawl tooth and a second pawl tooth. The connecting rod is hinged to the stop and the hook, and the connecting rod, the stop, the hook, and the base plate constitute a double rocker mechanism.

[0008] The double-pull engine hood lock has a fully locked state, a half-locked state, and an unlocked state. The lock tongue has a first locking position, a middle position, and a first unlocked position arranged sequentially. The lock hook has a second locking position and a second unlocked position. The stop has a first stop position and a second stop position.

[0009] In the fully locked state, the bolt is in the first locked position, and the stop is in the first stopped position.

[0010] The first pawl tooth engages with the ratchet tooth to restrict the rotation of the locking tongue in the unlocking direction. At this time, the locking tongue can lock the engine hood locking ring.

[0011] In the fully locked state, when the stop is pulled to rotate from the first stop position to the second stop position against the spring force of the second return spring, the stop drives the lock hook to rotate from the second locked position to the second unlocked position. The first pawl tooth rotates with the stop and disengages from the ratchet tooth. The second pawl tooth rotates with the stop and engages with the ratchet tooth of the latch, which rotates to the middle position in the unlocking direction under the action of the spring force of the first return spring, thereby restricting the rotation of the latch in the unlocking direction.

[0012] When the latch is in the middle position and the stop is in the second stop position, when the stop is released so that it returns to the first stop position under the action of the first return spring, the stop drives the lock hook to return to the second locking position. The second pawl tooth rotates with the stop and disengages from the ratchet tooth. The latch rotates to the first unlocking position along the unlocking direction. The latch can release the locking of the engine hood lock ring. The lock hook in the second locking position can lock the engine hood lock ring that has disengaged from the latch. The double-pull engine hood lock enters a half-locked state.

[0013] In the semi-locked state, when the stop is pulled again to make the stop rotate from the first stop position to the second stop position against the spring force of the second return spring, the stop drives the lock hook to rotate from the second lock position to the second unlock position. The lock hook can release the lock on the engine hood lock ring, and the double-pull engine hood lock enters the unlocked state.

[0014] Optionally, the stop includes a stop connecting part, a pull arm connected to the upper side of the stop connecting part, and a first rocker arm connected to the lower side of the stop connecting part. The stop connecting part is used for rotatable connection with the base plate, the first rocker arm is hinged to the connecting rod, and the pull arm is used for connection with the cable.

[0015] Optionally, the first pawl tooth and the second pawl tooth are disposed on the periphery of the stop member connecting portion. In the vertical direction, the first pawl tooth is located above the rotation axis of the stop member connecting portion, and the second pawl tooth is located below the rotation axis of the stop member connecting portion.

[0016] Optionally, the base plate is provided with an upward-facing locking groove, and the upper end of the locking hook is provided with a hook portion. When the locking hook is in the second locking position, the hook portion is suspended above the locking groove.

[0017] Optionally, the lock hook further includes a lock hook connecting part, a lock hook arm connected to the upper side of the lock hook connecting part, and a second rocker arm connected to the lower side of the lock hook connecting part. The lock hook connecting part is used for rotatable connection with the base plate, the second rocker arm is hinged to the connecting rod, and the hook part is connected to the upper end of the lock hook arm.

[0018] Optionally, the latch is a U-shaped open slot latch; the upper edge of the hook is inclined downward from the root of the hook to the end of the hook.

[0019] Optionally, the substrate is provided with a first limiting part that blocks the rotation path of the stop member. When the stop member is supported on the first limiting part, the stop member is located in the first stopping position.

[0020] Optionally, the base plate is provided with a second limiting part that blocks the rotation path of the latch. When the latch is supported on the second limiting part, the latch is located in the first unlocking position.

[0021] Optionally, the first return spring is a first torsion spring disposed between the latch and the base plate; the second return spring is a second torsion spring disposed between the stop and the base plate.

[0022] The present invention also proposes a vehicle including the double-pull engine hood lock described in any of the preceding claims.

[0023] The double-pull engine hood lock proposed in this invention helps to increase the opening height of the engine hood and also has the characteristics of simple structure and reliability. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the double-pull engine cover lock described in some embodiments;

[0025] Figure 2 This is one of the schematic diagrams illustrating the operation of the double-pull engine cover lock described in some embodiments;

[0026] Figure 3 This is the second schematic diagram of the operation of the double-pull engine cover lock described in some embodiments;

[0027] Figure 4 This is a schematic diagram of the structure of the stop, connecting rod and locking hook described in some embodiments;

[0028] Figure 5 This is a schematic diagram of the locking tongue structure described in some embodiments;

[0029] Figure 6 This is a schematic diagram of the substrate structure described in some embodiments.

[0030] Wherein, 1-base plate; 2-locking tongue; 3-first pin; 4-first return spring; 5-stop; 6-second pin; 7-second return spring; 8-locking hook; 9-third pin; 10-connecting rod; 11-fourth pin; 12-fifth pin; 13-engine hood locking ring;

[0031] 101-Substrate body; 102-First mating hole; 103-Second mating hole; 104-Third mating hole; 105-First protrusion; 106-First locking hole; 107-First limiting part; 108-First flange; 109-Limiting groove; 110-Second flange; 111-Second locking hole; 112-Second limiting part; 113-Locking groove; 114-First mounting hole; 115-Second protrusion; 116-Second mounting hole;

[0032] 301-Lock tongue body; 302-Lock tongue groove; 303-Ratchet tooth; 304-Extension; 305-First torsion spring connection;

[0033] 501-Stop connecting part; 502-First pawl tooth; 503-Second pawl tooth; 504-Pull arm; 505-Cable connecting part; 506-First rocker arm; 507-Torsion spring connecting arm; 508-Second torsion spring connecting part;

[0034] 701 - Torsion spring body; 702 - First torsion spring arm; 703 - Second torsion spring arm;

[0035] 801-Lock hook connecting part; 802-Lock hook arm; 803-Hook part; 804-Push-opening part; 805-Second rocker arm. Detailed Implementation

[0036] The embodiments of the present invention will be described below with reference to the accompanying drawings and preferred embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be understood that the preferred embodiments are only for illustrating the present invention and not for limiting the scope of protection of the present invention.

[0037] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Therefore, the drawings only show the components related to the present invention and are not drawn according to the actual number, shape and size of the components in the actual implementation. In the actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0038] like Figures 1 to 6 The double-pull engine hood lock shown includes a base plate 1, a latch 2, a hook 8, a stop 5, a connecting rod 10, a first return spring 4 acting on the latch 2, and a second return spring 7 acting on the stop 5 or the hook 8. The latch 2, the hook 8, and the stop 5 are rotatably connected to the base plate 1. The latch 2 is provided with ratchet teeth 303, and the stop 5 is provided with first pawl teeth 502 and second pawl teeth 503. The latch 2 and the stop 5 constitute a ratchet and pawl mechanism. The two ends of the connecting rod 10 are hinged to the stop 5 and the hook 8, respectively. The connecting rod 10, the stop 5, the hook 8, and the base plate 1 constitute a double rocker mechanism.

[0039] The double-pull engine hood lock has a fully locked state, a half-locked state, and an unlocked state. The lock tongue 2 has a first locking position, a middle position, and a first unlocking position arranged sequentially. The lock hook 8 has a second locking position and a second unlocking position. The stop member 5 has a first stop position and a second stop position.

[0040] In the fully locked state, the latch 2 is in the first locked position, the stop 5 is in the first stopped position, and the first pawl tooth 502 engages with the ratchet tooth 303 to restrict the rotation of the latch 2 in the unlocking direction. At this time, the latch 2 can lock the engine hood lock ring 13.

[0041] In the fully locked state, when the stop 5 is pulled to rotate from the first stop position to the second stop position against the spring force of the second return spring 7, the stop 5 drives the lock hook 8 to rotate from the second locked position to the second unlock position. The first pawl tooth 502 rotates with the stop 5 and disengages from the ratchet tooth 303. The second pawl tooth 503 rotates with the stop 5 and engages with the ratchet tooth 303 of the lock tongue 2, which rotates to the middle position in the unlocking direction under the action of the spring force of the first return spring 4, so as to restrict the rotation of the lock tongue 2 in the unlocking direction.

[0042] When the latch 2 is in the middle position and the stop 5 is in the second stop position, when the stop 5 is released so that it returns to the first stop position under the action of the first return spring 4, the stop 5 drives the lock hook 8 to return to the second locking position. The second pawl tooth 503 rotates with the stop 5 and disengages from the ratchet tooth 303. The latch 2 rotates in the unlocking direction to the first unlocking position. The latch 2 can release the lock on the engine hood lock ring 13. The lock hook 8, located in the second locking position, can lock the engine hood lock ring 13 that has disengaged from the latch 2. The double-pull engine hood lock enters the semi-locked state.

[0043] In the semi-locked state, when the stop 5 is pulled again to make the stop 5 rotate from the first stop position to the second stop position against the spring force of the second return spring 7, the stop 5 drives the lock hook 8 to rotate from the second lock position to the second unlock position. The lock hook 8 can release the lock on the engine hood lock ring 13, and the double pull engine hood lock enters the unlocked state.

[0044] Using the above technical solution, the double-pull unlocking function can be achieved by pulling the stop 5 with a cable. Since the locking hook 8 is used to partially lock the engine hood locking ring 13, the vertical dimension of the locking hook 8 can be made longer to increase the opening height of the engine hood, which is easy to implement. Furthermore, by setting a connecting rod 10 between the stop 5 and the locking hook 8 to form a double rocker mechanism, the entire double-pull engine hood lock can be reset using two springs, which is simple and reliable in structure.

[0045] By adopting the above technical solution, the opening height of the engine hood in the half-locked state can be increased, allowing users to effectively identify the open state of the double-pull engine hood lock without the need for a microswitch. In the above technical solution, the primary lock uses a locking tongue 2 and a stop 5 working together to achieve opening and closing; the half-lock uses a separate locking hook 8, which is connected to the stop 5 through a connecting rod 10 mechanism to achieve opening and closing of the half-lock. This improves the reliability of the half-lock matching while increasing the opening height of the half-lock. As a result, the lifting height of the engine hood in the half-locked state is increased, allowing users to directly visually see the difference in the front edge of the engine hood and more easily identify the open state of the engine hood lock.

[0046] The double-pull engine hood lock proposed in this application can increase the semi-lock opening height by increasing the size of the locking hook 8, for example, by increasing the length of the locking hook arm 802. Increasing the size of the locking hook 8 has little impact on other components and the overall size of the double-pull engine hood lock. However, for the double-pull engine hood lock proposed in patent application number CN202320145904.8, increasing the semi-lock opening height requires increasing the size of the locking tongue 2. Increasing the size of the locking tongue 2 will affect the locking stroke of the engine hood locking ring 13, resulting in an increase in the overall size of the double-pull engine hood lock and an increase in manufacturing cost.

[0047] In some embodiments, the stop 5 includes a stop connecting portion 501, a pull arm 504 connected to the upper side of the stop connecting portion 501, and a first rocker arm 506 connected to the lower side of the stop connecting portion 501. The stop connecting portion 501 is rotatably connected to the base plate 1. The first rocker arm 506 is hinged to the connecting rod 10. The pull arm 504 is provided with a cable connecting portion 505 for connecting to a cable. Using the above technical solution, the stop 5 can be pulled to rotate by the cable connected to the cable connecting portion 505, and then the locking hook 8 can be driven to rotate by the connecting rod 10.

[0048] In some embodiments, the first pawl tooth 502 and the second pawl tooth 503 are disposed on the periphery of the stop member connecting portion 501. Viewed vertically, the first pawl tooth 502 is located above the rotation axis of the stop member connecting portion 501, and the second pawl tooth 503 is located below the rotation axis of the stop member connecting portion 501. Using the above technical solution, the first pawl tooth 502 and the second pawl tooth 503 cooperate with the ratchet tooth 303 to smoothly achieve the double-pull unlocking function. In particular, by setting the second pawl tooth 503 to stop the locking tongue 2 in the middle position, it can prevent the engine hood locking ring 13 from directly passing over the locking hook 8 after disengaging from the locking tongue 2.

[0049] In some embodiments, the base plate 1 is provided with an upward-facing locking groove 113, and the upper end of the locking hook 8 is provided with a hook portion 803. When the locking hook 8 is in the second locking position, the hook portion 803 is suspended above the locking groove 113. By adopting the above technical solution, the hook portion 803 is used to hook the engine hood locking ring 13, so that the double-pull engine hood lock can achieve a semi-locked state. Furthermore, the position of the hook portion 803 in the vertical direction is easily adjustable, which provides convenience for increasing the opening height of the engine hood in the semi-locked state.

[0050] In some embodiments, the locking hook 8 further includes a locking hook connecting portion 801, a locking hook arm 802 connected to the upper side of the locking hook connecting portion 801, and a second rocker arm 805 connected to the lower side of the locking hook connecting portion 801. The locking hook connecting portion 801 is used for rotatable connection with the base plate 1, the second rocker arm 805 is hinged to the connecting rod 10, and the hook portion 803 is connected to the upper end of the locking hook arm 802. Using the above technical solution, the locking hook 8 can rotate synchronously with the stop member 5, which helps to simplify the structure of the double-pull engine hood lock and improve the reliability of the double-pull engine hood lock structure.

[0051] In some embodiments, the latch 2 is a U-shaped slotted latch with a latch groove 302 and an extension 304 extending outward from the lower side of the opening of the latch groove 302. When the latch 2 is in the first unlocked position, the latch groove 302 is inclined from bottom to top toward the end of the hook 803, and the extension 304 is located below the hook 803. The upper edge of the hook 803 is inclined downward from the root of the hook 803 to the end of the hook 803, and the upper edge of the hook 803 constitutes the extrusion part 804. Using the above technical solution, when the hood is closed, the locking hood ring 13 acts downward on the opening part 804, which can open the locking hook 8. Then, the locking hood ring 13 acts downward on the extension part 304 and the locking tongue groove 302, driving the locking tongue 2 to rotate in the locking direction until the locking tongue 2 rotates to the first locking position, whereby the locking tongue 2 locks the hood ring 13 in the locking groove 113. In specific implementation, the extension part 304 is used to contact the hood ring 13 during the hood closing process to guide the locking tongue groove 302 and the hood ring 13 to cooperate. The extension part 304 is also used to push the locking hood ring 13 upward during the unlocking process, especially after the locking hook 8 releases the locking hood ring 13.

[0052] In some embodiments, a first limiting portion 107 is provided on the substrate 1 to block the rotation path of the stop member 5. When the stop member 5 is supported on the first limiting portion 107, the stop member 5 is located in a first stopping position. Using the above technical solution, the stopping effect of the stop member 5 on the locking tongue 2 can be guaranteed. In a specific implementation, the spring force applied to the stop member 5 by the second return spring 7 causes the stop member 5 to press against the first limiting portion 107.

[0053] In some embodiments, a second limiting portion 112 is provided on the base plate 1 to block the rotation path of the latch 2. When the latch 2 is supported on the second limiting portion 112, the latch 2 is in the first unlocked position. Using the above technical solution, the engine hood locking ring 13 can smoothly engage with the latch groove 302 of the latch 2. In a specific implementation, the spring force applied to the latch 2 by the first return spring 4 causes the latch 2 to press against the second limiting portion 112.

[0054] In some embodiments, the first return spring 4 is a first torsion spring disposed between the latch 2 and the base plate 1; the second return spring 7 is a second torsion spring disposed between the stop member 5 and the base plate 1.

[0055] As a specific example, the latch body 301 of the latch 2 is hinged to the base plate 1 via the first pin 3, the stop member connecting part 501 of the stop member 5 is hinged to the base plate 1 via the second pin 6, the hook connecting part 801 of the hook 8 is hinged to the base plate 1 via the third pin 9, the connecting rod 10 is hinged to the stop member 5 via the fourth pin 11, and the connecting rod 10 is hinged to the hook 8 via the fifth pin 12. The base plate 1 includes a base plate body 101, a first flange 108 folded relative to the base plate body 101, a second flange 110 folded relative to the base plate body 101, a first protrusion 105 protruding from the base plate body 101, and a second protrusion 115 protruding from the base plate body 101. The first protrusion 105 is provided with a first mounting hole 114, and the second protrusion 115 is provided with a second mounting hole 116. The base plate body 101 is provided with a first mating hole 102 that mates with the first pin 3, a second mating hole 103 that mates with the second pin 6, and a third mating hole 104 that mates with the third pin 9; the first flange 108 is provided with a limiting groove 109 for limiting the cable. The first protrusion 105 is provided with a first locking hole 106, the stop member 5 is provided with a torsion spring connecting arm 507, the torsion spring connecting arm 507 is provided with a second torsion spring connecting part 508, the second torsion spring includes a torsion spring body 701 fitted on the second pin 6, a first torsion spring arm 702 connected to the second torsion spring connecting part 508, and a second torsion spring arm 703 connected to the first locking hole 106. The second flange 110 is provided with a second locking hole 111, the locking tongue 2 is provided with a first torsion spring connecting part 305, the first torsion spring is fitted on the first pin 3, and the two torsion spring arms of the first torsion spring are respectively connected to the second locking hole 111 and the first torsion spring connecting part 305.

[0056] As a specific example, the latch 2 and the stop 5 are arranged on one side of the base plate 1, the latch hook 1 is arranged on the other side of the base plate 1, the stop 5 is located on the left side of the latch 2, and the hook portion 803 of the latch hook 1 and the extension portion 304 of the latch 2 are both arranged facing the right side.

[0057] When the aforementioned double-pull hood lock is applied to a vehicle, the closing process is as follows: Under the action of external force, the hood lock ring 13 first contacts the opening portion 804 of the hook 8. The hood lock ring 13 continues to move downward and opens the hook 8, causing the hook 8 to rotate around its rotation axis. The hook 8 drives the connecting rod 10 to move to the right, and the connecting rod 10 applies a force to the lower end of the stop 5 to the right, causing the stop 5 to rotate counterclockwise against the spring force of the second return spring 7. After the hood lock ring 13 passes the hook portion 803, the hood lock ring 13 contacts the extension portion 304 of the latch 2 and continues to move downward. At this time, the latch 2 rotates in the locking direction against the spring force of the first return spring 4. After the hood lock ring 13 passes the hook portion 803, the spring force of the second return spring 7 drives the stop 5 to rotate clockwise, and the stop 5 drives the hook 8 to reset clockwise through the connecting rod 10. As the latch 2 rotates in the locking direction, the ratchet tooth 303 sequentially pushes open the second pawl tooth 503 and the first pawl tooth 502. After the ratchet tooth 303 passes the first pawl tooth 502, the stop 5 returns to its original position under the action of the second return spring 7. When the engine hood locking ring 13 moves to the bottom of the locking groove 113, the engine hood locking ring 13 stops moving, and the external force is removed. At this time, the latch 2 rotates counterclockwise under the spring force of the first return spring 4, and the ratchet tooth 303 engages with the first pawl tooth 502, and the double-pull engine hood lock is in a fully locked state.

[0058] When the aforementioned double-pull engine hood lock is applied to a vehicle, the opening process is as follows: First, pulling the cable causes the stop 5 to rotate counter-clockwise. When the stop 5 rotates, disengaging the ratchet tooth 303 from the first pawl tooth 502, the locking tongue 2 returns to its original position under the spring force of the first return spring 4. Before the force of the first pull of the cable is removed, the locking tongue 2 rotates, engaging the ratchet tooth 303 with the second pawl tooth 503. The second pawl tooth 503 prevents the locking tongue 2 from continuing to rotate, ensuring that the double-pull engine hood lock does not directly change from a fully locked state to an unlocked state. After the force of the first pull of the cable is released, the stop 5 returns to its original position under the action of the second return spring 7. The rotation of the stop 5 causes the ratchet tooth 303 to disengage from the second pawl tooth 503, and the locking tongue 2 returns to its original position under the action of the first return spring 4. The engine hood locking ring 13 is driven by the locking tongue 2 until the engine hood locking ring 13 disengages from the locking tongue 2 and is hooked by the locking hook 8, and the double-pull engine hood lock is in a semi-locked state. The second pull of the cable causes the stop 5 to rotate counterclockwise, which drives the locking hook 8 to rotate counterclockwise through the connecting rod 10. When the hook part 803 of the locking hook 8 rotates to disengage from the engine hood locking ring 13, the engine hood locking ring 13 is driven by the extension part 304 of the locking tongue 2 and continues to move upward, opening the engine hood.

[0059] The present invention also proposes a vehicle including the double-pull engine hood lock described in any of the preceding claims.

[0060] The above embodiments are merely preferred embodiments provided to fully illustrate the present invention, and the scope of protection of the present invention is not limited thereto. Equivalent substitutions or modifications made by those skilled in the art based on the present invention are all within the scope of protection of the present invention. In the description of this specification, the reference to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., means that a specific feature, structure, material, or characteristic associated with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in any suitable manner in one or more embodiments or examples. Furthermore, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0061] In the description of this invention, it should be understood that the terms "upper," "lower," "left," "right," etc., indicate directions based on the attached... Figure 1 The coordinate system used in this invention is for the purpose of facilitating and simplifying the description of the invention, and is not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of the invention.

Claims

1. A double-pull engine hood lock, characterized in that: The system includes a base plate (1), a latch (2), a hook (8), a stop (5), a connecting rod (10), a first return spring (4) acting on the latch (2), and a second return spring (7) acting on the stop (5) or the hook (8). The latch (2), the hook (8), and the stop (5) are rotatably connected to the base plate (1). The latch (2) is provided with ratchet teeth (303), and the stop (5) is provided with first pawl teeth (502) and second pawl teeth (503). The connecting rod (10) is hinged to the stop (5) and the hook (8) respectively. The connecting rod (10), the stop (5), the hook (8), and the base plate (1) constitute a double rocker mechanism. The double-pull engine hood lock has a fully locked state, a half-locked state and an unlocked state. The lock tongue (2) has a first locking position, a middle position and a first unlocking position arranged in sequence. The lock hook (8) has a second locking position and a second unlocking position. The stop member (5) has a first stop position and a second stop position. In the fully locked state, the bolt (2) is located in the first locked position, and the stop (5) is located in the first stopped position. The first pawl tooth (502) engages with the ratchet tooth (303) to restrict the rotation of the locking tongue (2) in the unlocking direction. At this time, the locking tongue (2) can lock the engine hood locking ring (13). In the fully locked state, when the stop (5) is pulled so that the stop (5) overcomes the spring force of the second return spring (7) and rotates from the first stop position to the second stop position, the stop (5) drives the lock hook (8) to rotate from the second locked position to the second unlock position. The first pawl tooth (502) rotates with the stop (5) and disengages from the ratchet tooth (303). The second pawl tooth (503) rotates with the stop (5) and engages with the ratchet tooth (303) of the latch (2) which rotates in the unlocking direction to the middle position under the action of the spring force of the first return spring (4), so as to restrict the rotation of the latch (2) in the unlocking direction. When the latch (2) is in the middle position and the stop (5) is in the second stop position, when the stop (5) is released so that the stop (5) is reset to the first stop position under the action of the first return spring (4), the stop (5) drives the lock hook (8) to reset to the second locking position, the second pawl tooth (503) rotates with the stop (5) and disengages from the ratchet tooth (303), the latch (2) rotates to the first unlocking position in the unlocking direction, the latch (2) can release the lock on the engine hood lock ring (13), the lock hook (8) in the second locking position can lock the engine hood lock ring (13) that has disengaged from the latch (2), and the double pull engine hood lock enters the half-locking state; In the semi-locked state, when the stop (5) is pulled again so that the stop (5) overcomes the spring force of the second return spring (7) and rotates from the first stop position to the second stop position, the stop (5) drives the lock hook (8) to rotate from the second lock position to the second unlock position. The lock hook (8) can release the lock on the engine hood lock ring (13), and the double-pull engine hood lock enters the unlocked state.

2. The double-pull engine hood lock according to claim 1, characterized in that: The stop (5) includes a stop connecting part (501), a pull arm (504) connected to the upper side of the stop connecting part (501), and a first rocker arm (506) connected to the lower side of the stop connecting part (501). The stop connecting part (501) is used to rotatably connect with the base plate (1). The first rocker arm (506) is hinged to the connecting rod (10). The pull arm (504) is used to connect with the cable.

3. The double-pull engine hood lock according to claim 2, characterized in that: The first pawl tooth (502) and the second pawl tooth (503) are disposed on the periphery of the stop member connecting part (501). In the vertical direction, the first pawl tooth (502) is located on the upper side of the rotation axis of the stop member connecting part (501), and the second pawl tooth (503) is located on the lower side of the rotation axis of the stop member connecting part (501).

4. The double-pull engine hood lock according to claim 1, characterized in that: The base plate (1) is provided with a locking groove (113) with the slot facing upward, and the upper end of the locking hook (8) is provided with a hook part (803). When the locking hook (8) is in the second locking position, the hook part (803) is suspended above the locking groove (113).

5. The double-pull engine hood lock according to claim 4, characterized in that: The lock hook (8) further includes a lock hook connecting part (801), a lock hook arm (802) connected to the upper side of the lock hook connecting part (801), and a second rocker arm (805) connected to the lower side of the lock hook connecting part (801). The lock hook connecting part (801) is used for rotatable connection with the base plate (1). The second rocker arm (805) is hinged to the connecting rod (10). The hook part (803) is connected to the upper end of the lock hook arm (802).

6. The double-pull engine hood lock according to claim 4, characterized in that: The latch (2) is a U-shaped open slot latch (2); the upper edge of the hook (803) is inclined downward from the root of the hook (803) to the end of the hook (803).

7. The double-pull engine hood lock according to claim 1, characterized in that: The substrate (1) is provided with a first limiting part (107) that blocks the rotation path of the stop (5). When the stop (5) is supported on the first limiting part (107), the stop (5) is located in the first stopping position.

8. The double-pull engine hood lock according to claim 1, characterized in that: The base plate (1) is provided with a second limiting part (112) that blocks the rotation path of the latch (2). When the latch (2) is supported on the second limiting part (112), the latch (2) is located in the first unlocking position.

9. The double-pull engine hood lock according to claim 1, characterized in that: The first return spring (4) is a first torsion spring disposed between the latch (2) and the base plate (1); the second return spring (7) is a second torsion spring disposed between the stop (5) and the base plate (1).

10. A vehicle, characterized in that: Includes the double-pull engine cover lock as described in any one of claims 1-9.

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