Unlocking mechanism of front hood lock
By designing electric and manual unlocking mechanisms in the front cover lock of the tram, the problem that the complex double pawl unlocking mechanism in the prior art cannot be manually unlocked when the motor fails is solved, and a simple and reliable unlocking method is achieved.
Patent Information
- Application Number
- CN202520445795.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-14
- Publication Date
- 2026-02-17
- Estimated Expiration
- 2035-03-14
AI Technical Summary
The existing double-pawl unlocking mechanism of the front cover lock of the tram is complex and cannot be manually unlocked when the motor fails, making it inconvenient to use.
A front hood lock unlocking mechanism was designed, which uses a main pawl and a secondary pawl mounted on the same pawl shaft. It is equipped with electric and manual unlocking mechanisms. Electric or manual unlocking can be achieved through the cooperation of the unlocking block and the unlocking lever, and smooth unlocking is ensured by the limit post and the reset push block.
It achieves simple linkage unlocking with dual ratchet pavers, and has electric and manual unlocking functions, ensuring smooth unlocking even in the event of motor failure, making it more convenient to use.
Smart Images
Figure CN223922836U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of lock technology, specifically to a front cover lock unlocking mechanism. Background Technology
[0002] Currently, some electric vehicles have a front cargo space at the front, equipped with a front hood. The latch on the front hood is pressed into the front hood lock to lock it. The front hood lock includes a ratchet mechanism and a pawl mechanism. Currently, the most common combination is a single ratchet and a single pawl. For some special double ratchet structures, a corresponding double pawl structure is required. However, the current mechanism is complex and does not have a manual unlocking function, making it inconvenient to use when the motor fails. Summary of the Invention
[0003] To solve the above-mentioned technical problems, this utility model provides a front hood lock unlocking mechanism, which has a simple structure, can meet the double ratchet linkage unlocking, and has a manual unlocking function.
[0004] The technical solution is as follows: a front hood lock unlocking mechanism, comprising a main pawl and a secondary pawl that cooperate with a double ratchet, the main pawl and the secondary pawl being mounted on the same pawl shaft; characterized in that an unlocking block is rotatably mounted on the pawl shaft, the unlocking block being connected to an unlocking drive mechanism; both the main pawl and the secondary pawl are provided with unlocking tabs; the unlocking block is provided with an unlocking push block that cooperates with the unlocking tabs; the unlocking block is provided with an unlocking reset torsion spring; the unlocking drive mechanism includes an electric unlocking mechanism and a manual unlocking mechanism.
[0005] The electric unlocking mechanism includes an electric pull rod connected to a motor and an electric unlocking lever rotatably connected to an unlocking shaft. The electric pull rod pulls the electric unlocking lever to rotate and pushes the unlocking block to swing for electric unlocking operation. The manual unlocking mechanism includes a manual pull rod and a manual unlocking lever rotatably connected to the unlocking shaft. The manual pull rod pulls the manual unlocking lever to rotate, and the manual unlocking lever drives the electric unlocking lever to rotate, thereby realizing manual unlocking operation.
[0006] A further feature is that a limit post is provided on the side of the unlocking block near the ratchet structure;
[0007] One side of the manual unlocking lever is provided with a manual unlocking bent piece that cooperates with the electric unlocking lever, and the other side is hinged to one end of the manual transmission block. The middle part of the manual transmission block is rotatably connected to the locking shaft, and the other end is provided with a reset push block. The reset push block is used to push the locking block of the double ratchet lock to reset.
[0008] With the adoption of this utility model, a two-stage unlocking push block is designed for double pawls, which can smoothly push the main pawl and the secondary pawl to complete the unlocking. The unlocking method is divided into electric and manual modes, which is convenient to use. Attached Figure Description
[0009] Figure 1 This is a first-view schematic diagram of the structure of this utility model;
[0010] Figure 2 This is a second-view schematic diagram of the structure of this utility model;
[0011] Figure 3 This is a diagram showing the result after removing manual unlocking;
[0012] Figure 4 This is a diagram showing the process after removing the electric and manual unlocking mechanisms;
[0013] Figure 5 This is a front view of the ratchet and pawl in the fully locked state;
[0014] Figure 6 This is a schematic diagram of the back of the ratchet and pawl in the fully locked state. Detailed Implementation
[0015] See Figures 1-6 As shown, a front hood lock unlocking mechanism includes a main pawl 1 and a secondary pawl 2 that cooperate with a double ratchet. The main pawl 1 and the secondary pawl 2 are mounted on the same pawl shaft 3. An unlocking block 4 is rotatably mounted on the pawl shaft 3. The unlocking block 4 is connected to an unlocking drive mechanism. Unlocking bends 1-1 and 2-1 are respectively provided on the main pawl 1 and the secondary pawl 2. Unlocking push blocks 4-1 and 4-2 that cooperate with the unlocking bends 1-1 and 1-2 are provided on the unlocking block 4. An unlocking reset torsion spring 5 is provided on the unlocking block 4. The unlocking drive mechanism includes an electric unlocking mechanism and a manual unlocking mechanism. In the figure, 1-2 and 2-2 are the main pawl torsion spring and the secondary pawl torsion spring, respectively.
[0016] The electric unlocking mechanism includes an electric pull rod 6 connected to a motor and an electric unlocking block 8 rotatably connected to an unlocking shaft 7. The unlocking block 4 has a protrusion 4-3. The electric pull rod 6 pulls the electric unlocking block 8 clockwise, which in turn pushes the protrusion 4-3, causing the unlocking block 4 to rotate counter-clockwise. The unlocking push block 4-1 first contacts the unlocking bend 2-1 and pushes the secondary pawl 2 to rotate counter-clockwise, then contacts the unlocking bend 1-1 and pushes the secondary pawl 1 to rotate counter-clockwise, releasing the ratchet. After the electric pull rod 6 reaches its upper limit, the electric unlocking block 8 resets, and the unlocking block 4 also resets. The main pawl 1 and the ratchet enter a semi-locked state. At this time, the position of the main pawl 1 changes. The electric pull rod 6 pulls the electric unlocking block 8 clockwise, which in turn pushes the protrusion 4-3, causing the unlocking block 4 to rotate counter-clockwise. The unlocking push block 4-2 contacts the unlocking bend 1-1 and pushes the main pawl to rotate counter-clockwise again, releasing the main ratchet again. Unlocking is complete, thus realizing the electric unlocking operation.
[0017] The manual unlocking mechanism includes a manual lever 9 and a manual unlocking block 10 that is rotatably connected to the unlocking shaft 7. The manual lever 9 pulls the manual unlocking block 10 to rotate, and the bent piece 10-1 on the manual unlocking block 10 drives the electric unlocking block to rotate. The remaining unlocking transmission principle is the same as the aforementioned electric unlocking process, and finally the manual unlocking operation is realized.
[0018] The electric unlocking process will not affect the manual unlocking process, while the manual unlocking process will be activated by the electric unlocking mechanism.
[0019] A limit post 12 is provided on the side of the unlocking block 4 near the ratchet structure to limit the reset position of the unlocking block 4.
[0020] The double ratchet includes a main ratchet 13 and a relief ratchet 14 mounted on the same ratchet shaft 15. A locking shaft 16 is provided below the ratchet shaft 15, and a rotatable locking block 17 is mounted on the locking shaft 16. The locking block 17 is connected to a locking drive mechanism, which is generally driven by a motor to rotate the locking lever 18. The locking block 17 is provided with a main push block 19 and a relief push block 20 that cooperate with the main ratchet 13 and the relief ratchet 14 respectively. The main push block 19 and the relief ratchet 14 are arranged side by side with intervals, and the two are connected by a connecting rod 11. During manual unlocking, if the device is in a partially locked state, the locking block 17 may obstruct the unlocking swing of the main ratchet 13 and the unloading ratchet 14. Therefore, the locking block 17 needs to be reset. The following transmission mechanism is designed: one side of the manual unlocking lever 10 is hinged to one end of the manual transmission block 21; the middle of the manual transmission block 21 is rotatably connected to the locking shaft 16; and the other end is equipped with a reset push block 22. The reset push block 22 is used to push the locking block 17, which is locked by the double ratchet, to reset. Specifically, when the manual unlocking lever 10 rotates clockwise, the hinge point rises, and the manual transmission block 21 rotates counterclockwise, causing the reset push block 23 to push the connecting rod 11 to reset. In the figure, 23 is the locking block torsion spring.
Claims
1. A front hood lock / unlock mechanism with a main pawl and a sub pawl that cooperate with a double ratchet, the main pawl and the sub pawl being mounted to the same pawl shaft, characterized in that, The pawl shaft is rotationally installed with an unlocking block, the unlocking block is connected with an unlocking driving mechanism, the main pawl and the auxiliary pawl are both provided with an unlocking bent piece, the unlocking block is provided with an unlocking push block matched with the unlocking bent piece, the unlocking block is provided with an unlocking reset torsional spring, the unlocking driving mechanism comprises an electric unlocking mechanism and a manual unlocking mechanism, The electric unlocking mechanism comprises an electric pull rod connected with a motor and an electric unlocking block rotationally connected with an unlocking shaft, the electric pull rod pulls the electric unlocking block to rotate and pushes the unlocking block to swing to perform an electric unlocking operation; the manual unlocking mechanism comprises a manual pull rod and a manual unlocking block rotationally connected with the unlocking shaft, the manual pull rod pulls the manual unlocking block to rotate, the manual unlocking block drives the electric unlocking block to rotate to realize a manual unlocking operation.
2. A front hood lock / unlock mechanism according to claim 1, characterized in that, The unlocking block is provided with a limiting column on a side close to the double pawls.
3. A front hood lock / unlock mechanism according to claim 1, characterized in that, One side of the manual unlocking block is provided with a manual unlocking bent piece matched with the electric unlocking block, the other side is hingedly connected with one end of a manual transmission block, the middle part of the manual transmission block is rotationally connected with a locking shaft, the other end is provided with a reset push block, and the reset push block is used to push a locking block of the double pawls to reset.