Automobile front hood lock

Abstract

The utility model relates to the technical field of locks, in particular to an automobile front hood lock, which can meet the requirement of electric control and omit the operation of closing and lifting a front hood by manual pressing, and comprises a lock shell, a ratchet mechanism and a pawl mechanism are arranged in the lock shell, the ratchet mechanism comprises a main ratchet and a force unloading ratchet, the main ratchet is connected with a main ratchet small torsion spring, and the pawl mechanism is connected with the main ratchet. The pawl mechanism comprises a main pawl and an auxiliary pawl, the main pawl is connected with a main pawl torsional spring, the auxiliary pawl is connected with an auxiliary pawl torsional spring, an upper locking shaft is arranged below the ratchet shaft, and a rotatable upper locking block is installed on the upper locking shaft. The upper locking block is connected with the upper locking driving mechanism and is provided with a main pushing block and a force unloading pushing block which are matched with the main ratchet wheel and the force unloading ratchet wheel respectively, the main ratchet wheel is provided with a first half-locking protruding block and a full-locking protruding block, the force unloading ratchet wheel is provided with a second half-locking protruding block, and the main pawl and the auxiliary pawl are each provided with a single-locking block.

Description

Technical Field

[0001] This utility model relates to the field of lock technology, specifically to a car hood lock. Background Technology

[0002] With the country's increasing environmental protection requirements and the development of battery technology, electric vehicles now occupy a large share of the automotive industry. The advantage of electric vehicles is that they have richer features compared to gasoline vehicles. Because electric vehicles, compared to gasoline vehicles, eliminate engines and other components, such as Tesla electric cars, a front trunk space is provided at the front of the car, equipped with a hood. The hood can be used to store items. The opening and closing of the hood is similar to that of a traditional gasoline car's engine cover, but it is more convenient to use. To open it, simply press a button inside the car, and the motor will unlock it. The hood will then open automatically under the action of a push rod. To close it, if an electric push rod were designed to automatically close the hood, it would need to overcome the torsion spring force on the lock to enter the locked state. In order to ensure that the hood can be smoothly lifted when unlocking, a torsion spring with a large torque would be used. However, the pulling force of the electric push rod cannot overcome the torsion spring force to close the hood. Therefore, it needs to be done manually. After flipping down the hood, press down on the hood to make the latch overcome the torsion spring force, causing the ratchet and pawl inside the lock to rotate and complete the locking. Currently, there is no hood lock that can automatically open and close. Utility Model Content

[0003] To solve the above-mentioned technical problems, this utility model provides a car hood lock that can meet the requirements of electric control, eliminating the need for manual pressing to close and lifting of the hood.

[0004] The technical solution is as follows: A car hood lock includes a lock housing, within which a ratchet mechanism and a pawl mechanism are disposed. The ratchet mechanism includes a main ratchet and a relief ratchet mounted on the same ratchet shaft. The main ratchet is connected to a small torsion spring, and the relief ratchet is connected to a large torsion spring. The pawl mechanism includes a main pawl cooperating with the main ratchet and a secondary pawl cooperating with the relief ratchet, mounted on the same pawl shaft. The main pawl is connected to a main pawl torsion spring, and the secondary pawl is connected to a secondary pawl torsion spring. A locking shaft is disposed below the ratchet shaft, and a rotatable locking block is mounted on the locking shaft. The locking block is connected to a locking drive mechanism and is provided with a main push block and a relief push block respectively cooperating with the main ratchet and the relief ratchet. The main ratchet is provided with... The device includes a first semi-locking protrusion and a full-locking protrusion; a second semi-locking protrusion is provided on the unloading ratchet; a single locking block is provided on both the main pawl and the secondary pawl; a first switch relay sensor is provided next to the unloading ratchet; a first trigger block that cooperates with the first sensor is provided on the unloading ratchet; a second switch relay sensor and a third switch relay sensor are provided next to the main ratchet; a second trigger block that cooperates with the second and third switch relay sensors is provided on the main ratchet; an unlocking block is rotatably mounted on the pawl shaft; the unlocking block is connected to an unlocking drive mechanism; an unlocking bend is provided on both the main pawl and the secondary pawl; an unlocking push block that cooperates with the unlocking bend is provided on the unlocking block; and an unlocking reset torsion spring is provided on the unlocking block.

[0005] Locking process: Before locking, the locking block first pushes the unloading ratchet to overcome the torque of the large torsion spring of the unloading ratchet and the torque of the secondary pawl torsion spring, rotating it to a half-locked state that engages with the secondary pawl. After the locking block resets, the lock is pressed down, causing the main ratchet to overcome the torque of the small torsion spring of the main ratchet and the torque of the main pawl to rotate to a half-locked state that engages with the main pawl. The locking block then pushes the main ratchet to rotate and engage with the main pawl, so that the lock reaches a fully locked state.

[0006] Unlocking process: The unlocking drive mechanism first drives the unlocking push block to push the secondary pawl and the main pawl to rotate together to enter the semi-locked state. The unlocking drive mechanism then drives the unlocking paddle block to push the secondary pawl and the main pawl to rotate to complete the final unlocking.

[0007] A further feature is that both the main ratchet and the unloading ratchet are provided with a paddle block on the side away from the pawl mechanism, and the main push block or the unloading push block pushes the paddle block to make the main ratchet or the unloading ratchet rotate.

[0008] The locking block is equipped with a locking reset torsion spring;

[0009] A limit post is provided on the side of the unlocking block near the ratchet structure;

[0010] The unlocking block is rotatably connected to the unlocking shaft, and a manual unlocking block is rotatably mounted on the unlocking shaft. The manual unlocking block is connected to a manual unlocking lever. One side of the manual unlocking block is provided with a manual unlocking bend that cooperates with the unlocking block, 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 that cooperates with the main push block and the unloading push block.

[0011] With this invention, before locking, the unloading push block on the locking block pushes the unloading ratchet to overcome the torque of the ratchet's large torsion spring, allowing it to engage with the secondary pawl to reach a semi-locked state. This pre-deforms the ratchet's large torsion spring, achieving the unloading effect before locking. When the lock is pressed in, it only needs to overcome the torque of the main ratchet's small torsion spring. The lock can be directly pressed in using components such as an electric push-pull rod, allowing the main ratchet to also enter a semi-locked state without manual intervention. Finally, the main push block on the locking block continues to push the main ratchet to rotate, bringing the lock to the fully locked position. This eliminates the need for manually closing the front hood. The unlocking operation is similar to existing unlocking methods, using two pulls of the unlocking block to complete two unlocking positions. This lock can be used with an electric push-pull rod to achieve a self-closing operation of the front hood, greatly improving ease of use. Attached Figure Description

[0012] Figure 1 This is a front view of the present utility model;

[0013] Figure 2 This is a schematic diagram of the back of the present invention;

[0014] Figure 3 This is a schematic diagram of the internal structure of the front of this utility model;

[0015] Figure 4 for Figure 3 Other perspectives Figure 1 ;

[0016] Figure 5 for Figure 3 Other perspectives Figure 2 ;

[0017] Figure 6 for Figure 3 Diagram omitting the manual unlocking mechanism;

[0018] Figure 7 for Figure 6 Rear view illustration;

[0019] Figure 8 A schematic diagram showing the installation locations of the three sensors;

[0020] Figure 9 Schematic diagram of the process of preparing the locking block to drive the unloading ratchet;

[0021] Figure 10 A schematic diagram illustrating the process of the ratchet being pushed to the semi-locked position to relieve pressure;

[0022] Figure 11 This is a schematic diagram of the latch being pressed in and the lock quickly resetting.

[0023] Figure 12 Schematic diagram of the process of preparing the main ratchet to rotate in preparation for the locking block;

[0024] Figure 13 A schematic diagram illustrating the process of the ratchet being pushed to the fully locked position to relieve pressure;

[0025] Figure 14 This is a diagram illustrating the quick reset after locking. Detailed Implementation

[0026] See Figures 1 to 8 As shown, a car hood lock includes a lock housing 1, within which a ratchet mechanism and a pawl mechanism are disposed. The ratchet mechanism includes a main ratchet 3 and a relief ratchet 4 mounted on the same ratchet shaft 2. The main ratchet 3 is connected to a small torsion spring 5, and the relief ratchet 4 is connected to a large torsion spring 6. The main ratchet 3 has an upper locking groove 8 for accommodating a latch 7. The pawl mechanism includes a main pawl 10 mounted on the same pawl shaft 9 and cooperating with the main ratchet 3, and a secondary pawl 11 cooperating with the relief ratchet 4. The main pawl 10... The main pawl torsion spring 12 is connected to the secondary pawl 11, which is connected to the secondary pawl torsion spring 13. A locking shaft 14 is provided below the ratchet shaft 2. A rotatable locking block 15 is installed on the locking shaft 14. The locking block 15 is connected to the locking drive mechanism. Generally, the locking block 15 is rotated by a motor driving the locking lever 16. The locking block 15 is provided with a main push block 17 and a relief push block 18 that cooperate with the main ratchet 3 and the relief ratchet 4, respectively. The main push block 17 and the relief push block 18 are arranged side by side with intervals, and the two are connected by a connecting rod 19.

[0027] The main ratchet 3 is provided with a first semi-locking protrusion 3-1 and a full-locking protrusion 3-2, and the unloading ratchet 4 is provided with a second semi-locking protrusion 4-1. The main pawl 10 and the secondary pawl 11 are each provided with a single locking block 10-1 and 11-1. The single locking block 10-1 of the main pawl 10 can cooperate with the first semi-locking protrusion 3-1 and the full-locking protrusion 3-2 respectively to achieve two locking states: semi-lock and full-lock. The single locking block 11-1 of the secondary pawl can cooperate with the second semi-locking protrusion 4-1 to achieve a semi-lock locking state.

[0028] The main ratchet 3 and the unloading ratchet 4 are respectively equipped with lever blocks 3-3 and 4-2 on the side away from the pawl mechanism. The main push block 17 or the unloading push block 18 pushes the lever blocks 3-3 or 4-2 to rotate the main ratchet 3 or the unloading ratchet 4. The locking block 15 is equipped with a locking reset torsion spring 20.

[0029] See Figures 9-14 As shown, the locking process is as follows: Before locking the latch 7, the motor drives the locking block 15 to rotate clockwise (viewed from the front). The unloading push block 18 pushes the lever block 4-2, causing the unloading ratchet 4 to overcome the torque of the unloading ratchet's large torsion spring 6 and the torque of the secondary pawl torsion spring 13 and rotate clockwise until the second half-locking protrusion 4-1 of the unloading ratchet 4 engages with the single locking block 11-1 of the secondary pawl 11 and enters the half-lock state. Then, the motor drives the locking block 15 to rotate counterclockwise to reset, and the latch 7 begins to press down, contacting the main ratchet 3. As the latch 7 continues to press down, the main ratchet 3 overcomes the torque of the main ratchet's small torsion spring 5 and the main pawl torsion spring 12. The torque rotates clockwise until the first half-locking protrusion 3-1 of the main ratchet 3 engages with the single locking block 10-1 of the main pawl 10 to enter the half-lock state; finally, the motor drives the upper locking block 15 to rotate clockwise, the main push block 17 pushes the lever block 3-3, so that the main ratchet 2 continues to overcome the torque of the main ratchet small torsion spring 5 and the torque of the main pawl torsion spring 12 to rotate clockwise, the latch 7 is pressed down, and the unloading ratchet 4 is also pressed and rotates clockwise until the full-locking protrusion 3-2 of the main ratchet 3 engages with the single locking block 10-1 of the main pawl 10 to enter the full-lock state, and the motor drives the upper locking block 15 to rotate counterclockwise to reset.

[0030] During the locking process described above, in addition to the initial manual pressing of the front cover button to provide a start signal, the motor requires two reset signals and one start signal. To achieve this smoothly, the following method is used: a first switch relay sensor 21 is installed next to the unloading ratchet 4, and a first trigger block 4-3 that cooperates with the first sensor is installed on the unloading ratchet 4. A second switch relay sensor 22 and a third switch relay sensor 23 are installed next to the main ratchet 3, arranged side by side with intervals. A second trigger block 3-4 that cooperates with the second switch relay sensor 22 and the third switch relay sensor 23 is installed on the main ratchet 3. Before locking, both the main ratchet 3 and the unloading ratchet 4 are in the open state. The first trigger block 4-3 presses against the first switch relay sensor 21, and the second trigger block 3-4 simultaneously presses against the first switch relay sensor 21. With the second switch relay sensor 22 and the third switch relay sensor 23 in place, when locking begins, pressing the front hood button inside the vehicle starts the motor, causing the locking block 15 to rotate clockwise. When the unloading ratchet 4 rotates to the half-lock position, the first trigger block 4-3 disengages from the first switch relay sensor 21. At this time, the motor receives a reset signal and begins to reset. When the lock comes down and rotates the main ratchet 3 to the half-lock position, the second trigger block 3-4 disengages from the second switch relay sensor 22 while still pressing against the third switch relay sensor 23. At this time, the motor receives a start signal and drives the locking block 15 to rotate clockwise again until the main ratchet 3 rotates to the fully locked position. Then, the second trigger block 3-4 disengages from the third switch relay sensor 23. At this time, the motor receives a reset signal and begins the second reset.

[0031] The unlocking mechanism is described below, and it is basically the same as the existing unlocking principle.

[0032] An unlocking block 24 is rotatably mounted on the pawl shaft 9. The unlocking block 24 is connected to the unlocking drive mechanism 25. Unlocking bends 10-2 and 11-2 are provided on both the main pawl 10 and the secondary pawl 11. An unlocking push block 26 that cooperates with the unlocking bends 10-2 and 11-2 is provided on the unlocking block 24. An unlocking lever 35 is rotatably connected to the unlocking shaft 29. An unlocking reset torsion spring 27 is provided on the unlocking block 24. A limit post 28 is provided on the side of the unlocking block 24 near the ratchet structure. During unlocking, the unlocking drive mechanism 25 is a pull rod connected to the motor, which pulls the unlocking lever 35 to rotate clockwise. The unlocking push block 26 below pushes the unlocking bends 10-2 and 11-2, causing the secondary pawl 11 and the main pawl 10 to... When both ratchet wheels rotate counterclockwise, the main ratchet 3 rotates counterclockwise under the action of the main ratchet small torsion spring 5, and the unloading ratchet 4 also rotates counterclockwise under the action of the unloading ratchet large torsion spring 6, pushing the lock 7 upward and the unlocking block 35 reset. At this time, the main ratchet 3 and the main pawl 10 are locked, and the unloading ratchet 4 and the secondary pawl are locked, entering a half-lock state. Then, the unlocking drive mechanism 25 pulls the unlocking block 35 to rotate clockwise again. At this time, the unlocking push block 26 above pushes the unlocking bend 10-2 to make the main ratchet 3 rotate counterclockwise again, and the unlocking push block 26 below pushes the unlocking bend 11-2 to make the unloading ratchet rotate counterclockwise again. The lock is lifted by the action of the unloading ratchet 4 and the main ratchet 3, completing the final unlocking.

[0033] If the motor of the locking drive mechanism malfunctions during the locking process, preventing further locking, especially in a partially locked state, the latch will be stuck and cannot be opened or locked again, requiring repair. This application provides a manual unlocking mechanism, as follows:

[0034] A manual unlocking block 30 is rotatably mounted on the unlocking shaft 29. The manual unlocking block 30 is connected to the manual unlocking lever 31. One side of the manual unlocking block 30 is provided with a manual unlocking bent piece 32 that cooperates with the unlocking block 24, and the other side is hinged to one end of the manual transmission block 33. The middle part of the manual transmission block 33 is rotatably connected to the locking shaft 14, and the other end is provided with a reset push block 34 that cooperates with the main push block 17 and the unloading push block 18. 36 in the figure is a manual unlocking reset torsion spring. When the manual unlocking lever 31 is pulled, the manual unlocking block 30 rotates clockwise, driving the unlocking lever 35 to rotate, which in turn pushes the unlocking push block 26 to perform the unlocking operation. At the same time, the manual transmission block 33 rotates counterclockwise, and the reset push block 34 pushes the connecting rod 19, so that the main push block 17 and the unloading push block 18, along with the locking block 15, are reset, allowing the main ratchet 3 and the unloading ratchet 4 to rotate counterclockwise smoothly to complete the unlocking operation. The linkage unlocking can be completed through manual control.

Claims

1. A car hood lock, comprising a lock housing, wherein a ratchet mechanism and a pawl mechanism are disposed within the lock housing, characterized in that, The ratchet mechanism includes a main ratchet and a relief ratchet mounted on the same ratchet shaft. The main ratchet is connected to a small torsion spring, and the relief ratchet is connected to a large torsion spring. The pawl mechanism includes a main pawl that cooperates with the main ratchet and a secondary pawl that cooperates with the relief ratchet, both mounted on the same pawl shaft. The main pawl is connected to a main pawl torsion spring, and the secondary pawl is connected to a secondary pawl torsion spring. A locking shaft is located below the ratchet shaft, and a rotatable locking block is mounted on the locking shaft. The locking block is connected to a locking drive mechanism and has a main push block and a relief push block that cooperate with the main ratchet and the relief ratchet, respectively. The main ratchet has a first semi-locking protrusion and a full-locking protrusion, and the relief ratchet has a second semi-locking protrusion. The ratchet consists of a main pawl and a secondary pawl, each equipped with a single locking block. A first switch relay sensor is located next to the unloading ratchet, and a first trigger block cooperating with the first switch relay sensor is located on the unloading ratchet. A second switch relay sensor and a third switch relay sensor are located next to the main ratchet, and a second trigger block cooperating with the second and third switch relay sensors is located on the main ratchet. An unlocking block is rotatably mounted on the pawl shaft, connected to an unlocking drive mechanism. Unlocking tabs are located on both the main and secondary pawls, and an unlocking push block cooperating with the unlocking tabs is located on the unlocking block. An unlocking reset torsion spring is located on the unlocking block. Locking process: Before locking, the locking block first pushes the unloading ratchet to overcome the torque of the large torsion spring of the unloading ratchet and the torque of the secondary pawl torsion spring, rotating it to a half-locked state that engages with the secondary pawl. After the locking block resets, the lock is pressed down, causing the main ratchet to overcome the torque of the small torsion spring of the main ratchet and the torque of the main pawl to rotate to a half-locked state that engages with the main pawl. The locking block then pushes the main ratchet to rotate and engage with the main pawl, so that the lock reaches a fully locked state. Unlocking process: The unlocking drive mechanism first drives the unlocking push block to push the secondary pawl and the main pawl to rotate together to enter the semi-locked state. The unlocking drive mechanism then drives the unlocking paddle block to push the secondary pawl and the main pawl to rotate to complete the final unlocking.

2. The automotive hood lock according to claim 1, characterized in that, Both the main ratchet and the unloading ratchet are provided with a paddle block on the side away from the pawl mechanism. The main push block or the unloading push block pushes the paddle block to make the main ratchet or the unloading ratchet rotate.

3. A car hood lock according to claim 1, characterized in that, The locking block is equipped with a locking reset torsion spring.

4. A car hood lock according to claim 1, characterized in that, The unlocking block is provided with a limit post on the side near the ratchet mechanism.

5. A car hood lock according to claim 1, characterized in that, The unlocking lever is rotatably connected to the unlocking shaft. A manual unlocking block is also rotatably mounted on the unlocking shaft. The manual unlocking block is connected to a manual unlocking lever. One side of the manual unlocking block is provided with a manual unlocking bend that cooperates with the unlocking block, 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 that cooperates with the main push block and the unloading push block.

Images