Hood lock and vehicle

Abstract

The utility model discloses a machine cover lock and vehicle, machine cover lock includes: mounting panel, lock arm, the lock arm rotatably arranged on the mounting panel, lock tongue, the lock tongue rotatably arranged on the mounting panel, the lock arm with the lock tongue is configured as two mutual engagement when the rotation process of machine cover is in the locked state and two mutual disengagement when machine cover is in the unlocked state, first reset spring, first reset spring sets up on the mounting panel, the first end of first reset spring with lock tongue is connected, first reset spring is configured as machine cover unlocking, the second end of first reset spring moves on the fixed track and produces the deformation. First reset spring can provide greater elastic force for lock tongue when machine cover unlocking, and can reduce its rigidity when designing and selecting, so that both can reduce the static closing force of machine cover, and can ensure that machine cover unlocking failure problem does not appear under any working condition.

Description

Technical Field

[0001] This utility model relates to the field of vehicle parts technology, and in particular to a hood lock and a vehicle. Background Technology

[0002] During the unlocking process, one end of the spring is connected to the locking arm, while the other end remains stationary. Unlocking is driven by the elastic potential energy stored in the fully locked state. Over time, the spring's mechanical properties decrease, reducing its stored elastic potential energy. This can lead to the risk of the front cover failing to unlock after a double-pull mechanism. Of course, choosing a spring with higher stiffness can ensure double-pull unlocking even after durability, but it will result in excessive static closing force on the cover, leading to a poor closing experience and potentially causing creases or cosmetic issues. Utility Model Content

[0003] This utility model aims to solve at least one of the technical problems existing in the prior art. To this end, this utility model proposes a hood lock in which the two ends of the first return spring move along a fixed trajectory, which can provide greater elasticity to the locking tongue. Thus, by appropriately reducing its stiffness during design selection, the static closing force of the hood can be reduced, and the problem of unlocking failure can be avoided.

[0004] This utility model further proposes a vehicle.

[0005] A hood lock according to a first aspect of the present invention includes: a mounting plate; a locking arm rotatably disposed on the mounting plate; a locking tongue rotatably disposed on the mounting plate, wherein the locking arm and the locking tongue are configured such that the hood is in a locked state when they are engaged during rotation and in an unlocked state when they are disengaged; and a first return spring disposed on the mounting plate, wherein a first end of the first return spring is connected to the locking tongue, and the first return spring is configured such that when the hood is unlocked, a second end of the first return spring deforms along a fixed trajectory.

[0006] According to the hood lock of this utility model embodiment, by designing both ends of the first return spring as free ends, the two ends of the first return spring can move along a fixed trajectory. Under the same conditions, this provides a greater elastic force to the locking tongue to return to its original rotation, thereby achieving better unlocking. At the same time, it can help to appropriately reduce the stiffness of the first return spring during design selection. In this way, under the same conditions, it can reduce the static closing force of the hood and ensure that the hood unlocking will not fail under any working conditions.

[0007] According to some embodiments of the present invention, the hood lock further includes: a sliding member, which is slidably disposed on the mounting plate and connected to the second end of the first reset spring; the sliding member is configured to slide along a fixed trajectory under the action of an external force.

[0008] According to some embodiments of the present invention, the sliding member is drivenly connected to the locking arm, and the sliding member is configured such that rotating the locking arm can drive the sliding member to slide along a fixed trajectory.

[0009] According to some embodiments of the present invention, the hood lock further includes a connecting rod assembly, which is disposed on the mounting plate, and its two ends are respectively driven connected to the lock arm and the sliding member.

[0010] According to some embodiments of the present invention, the linkage assembly includes: a driving rod rotatably disposed on the mounting plate, the first end of the driving rod abutting against one end of the locking arm; and a driven rod rotatably disposed on the mounting plate, the second end of the driving rod hinged to the first end of the driven rod, the second end of the driven rod abutting against the sliding member. When the locking arm rotates, it can drive the driving rod to rotate, and the driving rod drives the driven rod to rotate. The driven rod drives the sliding member to slide along a fixed trajectory.

[0011] According to some embodiments of the present invention, the sliding member has two horizontally opposite protrusions on the side facing the first reset spring, and one end of the connecting rod assembly abuts between the two protrusions.

[0012] According to some embodiments of the present invention, the locking arm and the sliding member are disposed on opposite sides of the mounting plate, the locking tongue is disposed between the locking arm and the sliding member, and the locking tongue and the connecting rod assembly are respectively disposed on other opposite sides of the mounting plate; wherein, the rotation trajectory of the locking arm is opposite to the sliding trajectory of the sliding member.

[0013] According to some embodiments of the present invention, the hood lock further includes: a fixing plate, the fixing plate being disposed above the lock tongue, the lock arm, the first return spring and the sliding member and connected to the mounting plate, the fixing plate being provided with a first sliding part, and the sliding member being provided with a second sliding part cooperating with the first sliding part.

[0014] According to some embodiments of the present invention, when the cover is in the locked state, the first return spring is in a first deformation state; during the unlocking process of the cover, the first return spring moves on a fixed trajectory to be in a second deformation state; the elastic potential energy accumulated in the first deformation state is less than the elastic potential energy accumulated in the second deformation state.

[0015] According to some embodiments of this utility model, a two-stage engagement structure is provided between the locking arm and the locking tongue to achieve primary and secondary engagement between them; wherein, when the cover is unlocked for the first time, the locking arm and the locking tongue disengage from the primary engagement and transition to the secondary engagement; when the cover is unlocked for the second time, the locking arm and the locking tongue disengage from the secondary engagement; and when the cover is unlocked for the first time and the second time, the first return spring can be driven to move on a fixed trajectory.

[0016] According to some embodiments of the present invention, the lock arm is provided with an engagement recess, and the lock tongue is provided with a primary engagement tooth and a secondary engagement tooth that engage with the engagement recess.

[0017] According to some embodiments of the present invention, the latch includes a lifting arm and a latch portion. The lifting arm is disposed above the latch portion and rotates synchronously with the latch portion. The lifting arm is connected to one end of the first return spring. The latch portion and the locking arm engage or disengage with each other.

[0018] According to some embodiments of the present invention, the hood lock further includes a locking ring, an opening for the locking ring to enter is formed on the mounting plate, the locking ring is locked in the opening by the locking tongue, and when the hood is unlocked, the locking tongue rotates under the action of the first return spring to drive the locking ring away from the opening.

[0019] According to some embodiments of the present invention, the hood lock further includes: a traction member, one end of which is connected to the lock arm and is used to drive the lock arm to rotate so as to disengage from the lock tongue.

[0020] According to some embodiments of the present invention, the hood lock further includes a second return spring, which is connected to the mounting plate and the lock arm respectively, and is used to reset the lock arm.

[0021] The vehicle according to a second aspect of the present invention includes the aforementioned hood lock.

[0022] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0023] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0024] Figure 1 This is a front view of the cover lock according to an embodiment of the present utility model;

[0025] Figure 2This is a front view of the internal structure of the cover lock according to an embodiment of the present utility model;

[0026] Figure 3 This is a schematic diagram illustrating the working principle of driving the first reset spring according to an embodiment of the present invention.

[0027] Figure 4 This is a schematic diagram of the sliding fit between the sliding member and the fixed plate according to an embodiment of the present utility model;

[0028] Figure 5 This is a schematic diagram of the hood lock in the locked state according to an embodiment of the present utility model;

[0029] Figure 6 This is a schematic diagram of the first-stage engagement of the hood lock in the locked state according to an embodiment of the present utility model;

[0030] Figure 7 This is a schematic diagram of the moment when the hood lock is unlocked from the locked state according to an embodiment of the present utility model;

[0031] Figure 8 This is a schematic diagram of the hood lock in a semi-locked state according to an embodiment of the present utility model;

[0032] Figure 9 This is a schematic diagram of the moment when the hood lock unlocks from a half-locked state according to an embodiment of the present utility model;

[0033] Figure 10 This is a schematic diagram of the hood lock in the unlocked state according to an embodiment of the present utility model.

[0034] Figure label:

[0035] 1. Mounting plate; 101. Opening; 2. Locking arm; 201. Engaging notch; 202. Locking arm shaft; 3. Locking tongue; 301. Primary engaging tooth; 302. Secondary engaging tooth; 303. Lifting arm; 304. Locking tongue; 305. Locking tongue shaft; 306. Locking tongue bushing; 4. First return spring; 5. Sliding member; 501. Protrusion; 6. Linkage assembly; 601. Driving rod; 602. Driven rod; 603. Connecting hinge; 7. Fixing plate; 701. First sliding part; 8. Locking ring; 9. Second return spring; 10. Traction member; 11. First rotating shaft; 12. Second rotating shaft; 13. Micro switch. Detailed Implementation

[0036] The embodiments of the present invention are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. The embodiments of the present invention are described in detail below.

[0037] The following is for reference. Figures 1-10 Description of a cover lock according to an embodiment of the present utility model.

[0038] like Figures 1-2 As shown, in this embodiment, the hood lock includes: a mounting plate 1, a locking arm 2, and a locking tongue 3. The locking arm 2 is rotatably mounted on the mounting plate 1. The locking tongue 3 is rotatably mounted on the mounting plate 1. The locking arm 2 and the locking tongue 3 are configured such that the hood is in a locked state when they engage with each other during rotation, and in an unlocked state when they disengage. Specifically, the locking arm 2 is rotatably mounted on the mounting plate 1 via a locking arm shaft 202, and the locking tongue 3 is rotatably mounted on the mounting plate 1 via a locking tongue shaft 305 and a locking tongue shaft 305 sleeve.

[0039] Furthermore, in this embodiment, the hood lock also includes a first return spring 4, which is disposed on the mounting plate 1. The first end of the first return spring 4 is connected to the locking tongue 3. When the hood is unlocked, the second end of the first return spring 4 moves along a fixed trajectory and deforms. The first return spring 4 is a tension spring.

[0040] The specific operation process of this embodiment is as follows: When unlocking the cover, when the locking arm 2 and the locking tongue 3 are in a mutually engaged state, the second end of the first return spring 4 moves on a fixed trajectory. This increases the deformation length of the first return spring 4, allowing it to accumulate more elastic potential energy and provide greater elastic force to the locking tongue 3. Until the locking arm 2 and the locking tongue 3 are completely disengaged, the greater elastic force provided by the first return spring 4 drives the locking tongue 3 to rotate and reset, thereby achieving unlocking.

[0041] It should be noted that when the cover is unlocked, the locking arm 2 and the locking tongue 3 will switch from a mutually engaged state to a completely disengaged state during rotation. When the locking arm 2 and the locking tongue 3 are mutually engaged, the second end of the first return spring 4 moves on a fixed trajectory, thereby allowing the first return spring 4 to accumulate more elastic potential energy.

[0042] Therefore, this embodiment designs both ends of the first return spring 4 as free ends, allowing both ends of the first return spring 4 to move along a fixed trajectory. Under the same conditions, this provides greater elastic force to the locking tongue 3 to reset its rotation, thereby achieving better unlocking. In this way, the stiffness of the first return spring 4 is appropriately reduced during design selection. Under the same conditions, this reduces the static closing force of the hood while ensuring that the hood unlocking will not fail under any operating conditions.

[0043] In this embodiment, the hood lock further includes a sliding member 5, which is slidably disposed on the mounting plate 1 and connected to the second end of the first return spring 4. The sliding member 5 is configured to slide along a fixed trajectory under the action of an external force.

[0044] Specifically, when the hood is unlocked, the sliding member 5 slides along a fixed trajectory on the mounting plate 1 under the action of external force. This causes the sliding member 5 to drive the first return spring 4 to deform along the fixed trajectory, thereby allowing the first return spring 4 to accumulate more elastic potential energy. The sliding member 5 ensures that the first return spring 4 moves along the fixed trajectory, thus controlling the range and direction of movement of the first return spring 4, making the movement of the first return spring 4 more stable and reliable.

[0045] Furthermore, in this embodiment, the sliding member 5 is drivenly connected to the locking arm 2, and the sliding member 5 is configured such that rotating the locking arm 2 can drive the sliding member 5 to slide along a fixed trajectory.

[0046] With this configuration, when unlocking the hood, rotating the locking arm 2 drives the sliding member 5 to slide along a fixed trajectory on the mounting plate 1, thereby increasing the deformation length of the first return spring 4. Then, rotating the locking arm 2 disengages it from the latch 3. At this point, the first return spring 4 provides more elastic potential energy to rotate the latch 3, thus unlocking the hood. In other words, by using the rotation of the locking arm 2 during the unlocking process to drive the sliding member 5, no additional external force is required. This allows the first return spring 4 to accumulate more elastic potential energy before the locking arm 2 and latch 3 disengage, and also enables the locking arm 2 and latch 3 to disengage. After disengagement, the elastic force of the first return spring 4 can better achieve the reset and unlocking of the latch 3.

[0047] In this embodiment, the hood lock further includes a linkage assembly 6, which is disposed on the mounting plate 1. Both ends of the linkage assembly 6 are drivenly connected to the locking arm 2 and the sliding member 5, respectively. During unlocking, the rotational force of the locking arm 2 is transmitted to the sliding member 5 through the linkage assembly 6, enabling the sliding member 5 to slide along a fixed trajectory. The linkage assembly 6 converts the rotational motion of the locking arm 2 into the linear motion of the sliding member 5, allowing the first return spring 4 to slide along a fixed trajectory. Therefore, based on the layout of the locking arm 2, the latch 3, the first return spring 4, and the sliding member 5, the linkage assembly 6 enables power transmission between the locking arm 2 and the sliding member 5.

[0048] In this embodiment of the invention, the linkage assembly 6 includes a driving rod 601 and a driven rod 602. The driving rod 601 is rotatably mounted on the mounting plate 1, and its first end abuts against one end of the locking arm 2. The driven rod 602 is rotatably mounted on the mounting plate 1, and its second end is hinged to the first end of the driving rod 601. The second end of the driven rod 602 abuts against the sliding member 5. When the locking arm 2 rotates, it drives the driving rod 601 to rotate, and the driving rod 601 drives the driven rod 602 to rotate. The driven rod 602 drives the sliding member 5 to slide along a fixed trajectory.

[0049] The mounting plate 1 is provided with a first rotating shaft 11 and a second rotating shaft 12. The first rotating shaft 11 is provided with a driving rod 601, and the second rotating shaft 12 is provided with a driven rod 602. The driving rod 601 and the driven rod 602 are connected by a connecting hinge 603 installed at their ends.

[0050] like Figure 3 As shown, when the locking arm 2 is pulled to rotate in the F direction, the locking arm 2 will rotate clockwise around the locking arm shaft 202 in the W1 direction. The rotation trajectory of the end of the locking arm 2 is an arc, and the front end of the driving rod 601 is exactly on this arc trajectory. Therefore, under the push of the locking arm 2, the driving rod 601 will rotate counterclockwise around the first rotating shaft 11 in the W2 direction. At this time, the driving rod 601 will push the driven rod 602 to rotate through the connecting hinge 603. The driven rod 602 will rotate clockwise around the second rotating shaft 12 in the W3 direction. When the driven rod 602 rotates clockwise, its end travels in an arc, with the center of the arc being the axis of the second rotating shaft 12. The sliding member 5, connected to the second end of the first return spring 4, lies precisely on this arc. Therefore, when the driven rod 602 rotates, it pushes the sliding member 5 to move along the fixed trajectory in the W4 direction. At this time, the second end of the first return spring 4 will move along with the sliding member 5, and its length will also extend, helping the first return spring 4 to store more elastic potential energy, ensuring that the locking tongue 3 is unlocked under the action of the first return spring 4. The linkage assembly 6 can be adjusted in length, angle, etc., according to specific needs. It is understood that in other embodiments, the linkage assembly 6 can also be other structures to achieve complex motion transmission.

[0051] Furthermore, in this embodiment, the slider 5 is provided with two horizontally opposite protrusions 501 on the side facing the first return spring 4, and one end of the connecting rod assembly 6 abuts between the two protrusions 501.

[0052] like Figure 2 and Figure 3 As shown, the sliding member 5 is a sliding block. The side of the sliding block connected to the first return spring 4 has two protrusions 501. The two protrusions 501 are arranged opposite each other in the horizontal direction, so that a space is defined between the two protrusions 501, so that one end of the connecting rod assembly 6 can abut in the space, and the power can be transmitted to the sliding member 5 through the connecting rod assembly 6.

[0053] In this embodiment, the locking arm 2 and the sliding member 5 are disposed on opposite sides of the mounting plate 1, the locking tongue 3 is disposed between the locking arm 2 and the sliding member 5, and the locking tongue 3 and the connecting rod assembly 6 are respectively disposed on the other opposite sides of the mounting plate 1. The rotation trajectory of the locking arm 2 is opposite to the sliding trajectory of the sliding member 5.

[0054] like Figure 3As shown, since the locking arm 2 and the locking tongue 3 engage or disengage, the first return spring 4 is positioned on the side of the locking tongue 3 away from the locking arm 2, and the sliding member 5 is positioned on the side of the first return spring 4 away from the locking tongue 3, allowing the sliding member 5 to move in the direction away from the locking tongue 3 to lengthen the deformation length of the first return spring 4. That is, the locking arm 2 and the sliding member 5 are positioned on opposite sides of the mounting plate 1. Since the connecting rod assembly 6 is used for transmission between the locking arm 2 and the sliding member 5, the connecting rod assembly 6 is positioned on one side of the other opposite sides of the mounting plate 1, respectively arranged on both sides of the first return spring 4 along with the locking tongue 3. In this layout, when the locking arm 2 rotates in the direction away from the locking tongue 3, it disengages from the locking tongue 3. Similarly, the sliding member 5 slides in the direction away from the locking tongue 3 to lengthen the deformation length of the first return spring 4. It is understood that in other embodiments, the above-mentioned components of the hood lock can be arranged according to specific structures and requirements, including but not limited to the layout structure described above.

[0055] In this embodiment, the hood lock further includes a fixing plate 7, which is located above the locking tongue 3, the locking arm 2, the first return spring 4 and the sliding member 5, and is connected to the mounting plate 1. The fixing plate 7 is provided with a first sliding part 701, and the sliding member 5 is provided with a second sliding part that cooperates with the first sliding part 701.

[0056] Combination Figure 1 and Figure 2 As shown, mounting plate 1 is connected to fixed plate 7. Lock arm shaft 202, lock tongue shaft 305, first rotating shaft 11, and second rotating shaft 12 are installed between mounting plate 1 and fixed plate 7 to mount lock arm 2, lock tongue 3, driving rod 601, and driven rod 602 between mounting plate 1 and fixed plate 7. The fixed plate 7 shields lock arm 2, lock tongue 3, and connecting rod assembly 6, protecting the internal structure. Simultaneously, the lock arm shaft 202, lock tongue shaft 305, first rotating shaft 11, and second rotating shaft 12 are fixed between mounting plate 1 and fixed plate 7, ensuring the reliable installation of lock arm 2, lock tongue 3, and connecting rod assembly 6. Figure 4 As shown, in this embodiment, a sliding groove is provided on the fixed plate 7, and the two ends of the sliding member 5 are fitted into the sliding groove, so that it can move directionally along the sliding groove under the action of external force.

[0057] In this embodiment, when the hood is locked, the first return spring 4 is in a first deformation state. During the unlocking process, the first return spring 4 moves along a fixed trajectory to a second deformation state. The elastic potential energy accumulated in the first deformation state is less than the elastic potential energy accumulated in the second deformation state.

[0058] In existing technologies, to ensure sufficient elastic force for unlocking the hood under various extreme conditions and after durability testing, the springs are designed with high stiffness. This increases the force required to close the hood, affecting the user's experience, especially for vehicles with a front trunk. In this embodiment, when unlocking the hood, the first return spring 4 moves along a fixed trajectory to continue deforming from its first deformation state, accumulating additional elastic potential energy to reach a second deformation state. Thus, under the same conditions, this embodiment effectively reduces the design stiffness of the first return spring 4, thereby reducing the static closing force of the hood while ensuring smooth unlocking and improving the hood-closing experience.

[0059] In this embodiment, a two-stage engagement structure is provided between the locking arm 2 and the locking tongue 3 to achieve primary and secondary engagement between them. Specifically, when the hood is unlocked for the first time, the locking arm 2 and the locking tongue 3 disengage from the primary engagement and transition to the secondary engagement. When the hood is unlocked for the second time, the locking arm 2 and the locking tongue 3 disengage from the secondary engagement. Furthermore, the first return spring 4 can be moved along a fixed trajectory during both the first and second unlocking of the hood.

[0060] Specifically, the hood unlocking process is divided into primary unlocking and secondary unlocking. The working principle of the first return spring 4 is the same for both primary and secondary unlocking. The primary and secondary unlocking processes of this hood lock will be described in detail below.

[0061] like Figure 5 and Figure 6 As shown, the cover is in the locked state, at which time the locking arm 2 and the locking tongue 3 are in the first-level engagement state.

[0062] like Figure 7 and Figure 8 As shown, when the hood is unlocked for the first time (first-level unlock), both the locking arm 2 and the locking tongue 3 rotate. Before the locking arm 2 and the locking tongue 3 disengage from the first-level engagement, the second end of the first return spring 4 moves along a fixed trajectory to accumulate additional elastic potential energy. Then, after the locking arm 2 and the locking tongue 3 disengage from each other, the locking tongue 3 rotates under the elastic force of the first return spring 4 until it reaches the second-level engagement with the locking arm 2. At this time, the hood is in a semi-locked state.

[0063] like Figure 9 and Figure 10 As shown, during the second unlocking of the hood (secondary unlocking), both the locking arm 2 and the locking tongue 3 rotate. Before the locking arm 2 and the locking tongue 3 disengage from the secondary engagement, the second end of the first return spring 4 moves along a fixed trajectory to accumulate additional elastic potential energy. Then, after the locking arm 2 and the locking tongue 3 disengage from each other, the locking tongue 3 returns to its original position and rotates under the elastic force of the first return spring 4, thus unlocking the hood. At this time, the hood is in the unlocked state.

[0064] In this embodiment, the locking arm 2 is provided with an engagement notch 201, and the locking tongue 3 is provided with a primary engagement tooth 301 and a secondary engagement tooth 302 that engage with the engagement notch 201.

[0065] Combination Figure 6 , Figure 8 and Figure 10 As shown, the locking arm 2 has an engagement notch 201 on the side facing the locking tongue 3, and the outer periphery of the locking tongue 3 has primary engagement teeth 301 and secondary engagement teeth 302. When the hood is unlocked for the first time, the locking arm 2 is rotated, and the primary engagement teeth 301 of the locking tongue 3 disengage from the engagement notch 201. At this time, under the elastic force of the first return spring 4, the locking tongue 3 is rotated, causing the secondary engagement teeth 302 to engage in the engagement notch 201. When the hood is unlocked for the second time, the locking arm 2 is rotated, and the secondary engagement teeth 302 of the locking tongue 3 disengage from the engagement notch 201. At this time, under the elastic force of the first return spring 4, the locking tongue 3 is reset and rotated, thus unlocking the hood. That is, this hood lock structure has a double-pull opening function, and the vehicle hood can be opened smoothly with two operations, improving the user's operating comfort.

[0066] In this embodiment, the locking tongue 3 includes a lifting arm 303 and a locking tongue 304. The lifting arm 303 is disposed above the locking tongue 304 and rotates synchronously with the locking tongue 304. The lifting arm 303 is connected to the second end of the first return spring 4. The locking tongue 304 engages with or disengages from the locking arm 2.

[0067] like Figures 5-7 As shown, when the lifting arm 303 is reset and rotated under the elastic force of the first return spring 4, it drives the locking tongue 304 to rotate synchronously, thereby driving the locking tongue 304 to rotate and unlock. In this way, the locking tongue 3 is separated into two parts, which facilitates installation, maintenance and replacement.

[0068] In this embodiment, the hood lock further includes a locking ring 8. An opening 101 for the locking ring 8 to enter is formed on the mounting plate 1. The locking ring 8 is locked within the opening 101 by a locking tongue 3. When the hood is unlocked, the locking tongue 3 rotates under the action of the first return spring 4 to drive the locking ring 8 away from the opening 101. Figures 5-10 As shown, when the hood is locked, the latch 3 locks the locking ring 8 within the opening 101 of the mounting plate 1. When the hood is unlocked, the locking arm 2 completely disengages from the latch 3. With sufficient elastic potential energy accumulated in the first return spring 4, the latch 3 is driven to return to its original position and rotate, thereby driving the locking ring 8 away from the opening 101, thus unlocking the hood.

[0069] In this embodiment, the hood lock further includes a traction member 10, one end of which is connected to the lock arm 2 and is used to drive the lock arm 2 to rotate so as to disengage from the lock tongue 3.

[0070] exist Figure 3As shown, the traction component 10 is a zipper, which is unlocked by pulling the locking arm 2 using a handle installed in the cab. Since the hood in this embodiment has a primary unlocking and a secondary unlocking mechanism, the zipper requires two pulls of the locking arm 2 to switch the hood from a locked state to a semi-locked state during the first unlocking and from a semi-locked state to an unlocked state during the second unlocking. That is, the vehicle hood can be opened smoothly with just two operations, facilitating user operation.

[0071] In this embodiment, the hood lock further includes a second return spring 9, which is connected to the mounting plate 1 and the lock arm 2 respectively, and is used to reset the lock arm 2.

[0072] like Figures 5-10 As shown, when the traction member 10 is pulled to rotate the locking arm 2 clockwise to a critical point, the primary engagement between the locking tongue 3 and the locking arm 2 disappears. At this time, the locking tongue 3 will drive the locking ring 8 to move upward under the elastic force of the first return spring 4. When the traction member 10 is released, the locking arm 2 will return to its original position under the action of the second return spring 9, until the lock arm 2 reaches its original position. Figure 8 The half-locked state is shown.

[0073] like Figure 9 As shown, by pulling the traction member 10 again, the locking arm 2 is rotated clockwise to a critical point, and the secondary engagement between the locking tongue 3 and the locking arm 2 disappears again. At this time, the locking tongue 3 will drive the locking ring 8 to move upward under the elastic force of the first return spring 4 until it reaches the point shown. Figure 10 The unlocked state is shown. In this state, when the traction member 10 is released, the locking arm 2 will reset again under the action of the second return spring 9, but there will no longer be a new engagement between the locking tongue 3 and the locking arm 2. The cover is in the unlocked state and the cover can be easily opened.

[0074] A vehicle according to a second aspect embodiment of the present invention includes a hood lock. The hood lock of this embodiment is applied to a vehicle, and the first and second level unlocking processes of the hood lock and the principle of unlocking the drive lock ring 8 will be described in detail below.

[0075] like Figure 5 and Figure 6 As shown, the cover lock is in the fully locked state. In this state, the locking arm 2 and the locking tongue 3 are in the first-level engagement state. The locking tongue 3 cannot rotate counterclockwise, so the locking ring 8 cannot move upward and the cover cannot be opened by ordinary external force.

[0076] like Figure 7As shown, when the locking arm 2 is rotated clockwise by pulling the traction member 10 to a critical point, the primary engagement between the locking tongue 3 and the locking arm 2 disappears. At this time, the locking tongue 3 will rotate counterclockwise under the force of the first return spring 4, driving the lifting arm 303 to move. Simultaneously, the lifting arm 303 drives the locking ring 8 to move upward. When the traction member 10 is released, the locking arm 2 will return to its original position under the action of the second return spring 9, until the critical point is reached. Figure 8 The image shows a partially locked state. In... Figure 8 In the semi-locked state shown, the locking arm 2 and the locking tongue 3 reach a secondary engagement state. The locking tongue 3 still cannot rotate counterclockwise, so the locking ring 8 still cannot move upward. In this state, the cover still cannot be opened by normal opening force and is in a semi-locked state.

[0077] like Figure 9 As shown, if the locking arm 2 is rotated clockwise again by pulling the traction member 10 to a critical point, the secondary engagement between the locking tongue 3 and the locking arm 2 will disappear again. Similarly, the locking tongue 3 will rotate counterclockwise when the first return spring 4 drives the lifting arm 303 to move, and at the same time, the lifting arm 303 drives the locking ring 8 to move upward until it reaches the critical point. Figure 10 The unlocked state is shown. In this state, when the traction member 10 is released, the locking arm 2 will reset again under the action of the second return spring 9. However, there will no longer be a new engagement between the locking tongue 3 and the locking arm 2, and there will no longer be any obstruction from the locking tongue 3 above the locking ring 8. At this time, the cover is in the unlocked state and the cover can be easily opened.

[0078] The locking process of the hood lock is the reverse of the unlocking process described above. When the hood is manually pressed, the locking ring 8 welded to the hood will push the lifting arm 303 to rotate in the opposite direction. The locking tongue 304, which is linked to the lifting arm 303, will rotate synchronously until it reaches the semi-locked state with the locking arm 2, and then to the fully locked state.

[0079] Furthermore, the hood lock also includes a microswitch 13, which is mounted on the mounting plate 1. The microswitch 13 is configured to be triggered during the rotation of the latch 3, causing it to transmit an unlocking / locking signal to the processor. That is, when the latch 3 is rotated to the locked state, the microswitch 13 is triggered to transmit a locking signal to the processor. Similarly, when the latch 3 is rotated to the unlocked state, the microswitch 13 is triggered to transmit an unlocking signal to the processor. The processor then processes the received unlocking / locking signals and displays them on the vehicle's instrument panel, thus reminding the user whether the hood is currently locked or unlocked.

[0080] Therefore, because commercially available double-pull unlocking structures are designed with sufficient spring stiffness to ensure performance under various extreme conditions and after durability, this increases the force required to close the cover, affecting the user's closing experience. This invention, however, designs the first return spring 4 with a double-free-end structure. Under the same conditions, this effectively reduces the design stiffness of the first return spring 4, thereby reducing the static closing force of the front cover while ensuring smooth unlocking, thus improving the closing experience.

[0081] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", 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 utility model and simplifying the description, and are 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, and therefore should not be construed as a limitation of this utility model.

[0082] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are 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.

[0083] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A cover lock, characterized in that, include: Mounting plate; A locking arm, which is rotatably mounted on the mounting plate; A locking tongue is rotatably mounted on the mounting plate. The locking arm and the locking tongue are configured such that the cover is locked when they engage with each other during rotation and unlocked when they disengage. A first return spring is disposed on the mounting plate. The first end of the first return spring is connected to the locking tongue. When the cover is unlocked, the second end of the first return spring moves along a fixed trajectory and deforms.

2. The hood lock according to claim 1, characterized in that, Also includes: A sliding member is slidably disposed on the mounting plate, and the sliding member is connected to the second end of the first reset spring; The slider is configured to slide along a fixed trajectory under the action of an external force.

3. The hood lock according to claim 2, characterized in that, The slider is driven to the locking arm, and the slider is configured to rotate the locking arm to drive the slider to slide along a fixed trajectory.

4. The hood lock according to claim 3, characterized in that, Also includes: A linkage assembly is disposed on the mounting plate, and its two ends are respectively driven to be connected to the locking arm and the sliding member.

5. The hood lock according to claim 4, characterized in that, The linkage assembly includes: An active lever is rotatably mounted on the mounting plate, with its first end abutting against one end of the locking arm; The driven rod is rotatably mounted on the mounting plate. The second end of the driving rod is hinged to the first end of the driven rod. The second end of the driven rod abuts against the sliding member. When the locking arm rotates, it can drive the driving rod to rotate, and the driving rod drives the driven rod to rotate. The driven rod drives the sliding member to slide on a fixed trajectory.

6. The hood lock according to claim 4, characterized in that, The slider has two horizontally opposite protrusions on the side facing the first return spring, and one end of the connecting rod assembly abuts between the two protrusions.

7. The hood lock according to claim 4, characterized in that, The locking arm and the sliding member are disposed on opposite sides of the mounting plate, the locking tongue is disposed between the locking arm and the sliding member, and the locking tongue and the connecting rod assembly are respectively disposed on the other opposite sides of the mounting plate; wherein, The trajectory of the locking arm's rotation is opposite to the direction of the sliding trajectory of the slider.

8. The hood lock according to claim 2, characterized in that, Also includes: A fixing plate is disposed above the lock tongue, the lock arm, the first return spring and the sliding member and is connected to the mounting plate. The fixing plate is provided with a first sliding part, and the sliding member is provided with a second sliding part that cooperates with the first sliding part.

9. The hood lock according to claim 1, characterized in that, When the cover is in the locked state, the first return spring is in the first deformed state; During the unlocking process, the first reset spring moves along a fixed trajectory to be in a second deformation state; wherein, the elastic potential energy accumulated in the first deformation state is less than the elastic potential energy accumulated in the second deformation state.

10. The hood lock according to claim 1, characterized in that, A two-stage engagement structure is provided between the locking arm and the locking tongue to achieve primary and secondary engagement between them; wherein... When the cover is unlocked for the first time, the locking arm and the locking tongue disengage from the first-level engagement and transition to the second-level engagement. When the cover is unlocked for the second time, the locking arm and the locking tongue disengage from the second-level engagement. Both the first and second unlocking of the cover can cause the first return spring to move on a fixed trajectory.

11. The hood lock according to claim 10, characterized in that, The locking arm is provided with an engagement notch, and the locking tongue is provided with a primary engagement tooth and a secondary engagement tooth that engage with the engagement notch.

12. The hood lock according to claim 1, characterized in that, The locking tongue includes a lifting arm and a locking tongue portion. The lifting arm portion is disposed above the locking tongue portion and rotates synchronously with the locking tongue portion. The lifting arm portion is connected to the first end of the first return spring. The locking tongue portion and the locking arm portion engage or disengage with each other.

13. The hood lock according to claim 1, characterized in that, Also includes: The mounting plate has an opening for the locking ring to enter. The locking ring is locked in the opening by the latch. When the cover is unlocked, the latch rotates under the action of the first return spring to drive the locking ring away from the opening.

14. The hood lock according to claim 1, characterized in that, Also includes: A traction member, one end of which is connected to the locking arm, is used to drive the locking arm to rotate so as to disengage from the locking tongue.

15. The hood lock according to claim 14, characterized in that, Also includes: The second return spring is connected to the mounting plate and the locking arm respectively, and is used to reset the locking arm.

16. A vehicle, characterized in that, Includes the hood lock as described in any one of claims 1-15.

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