Double-pulling front cover lock

Abstract

The utility model relates to the technical field of vehicle door locks, in particular to a double-pulling front cover lock, which is simple in structure, small in change of a ratchet wheel and a pawl and low in cost and comprises a double-pulling-lock shell, a ratchet wheel and a pawl are respectively mounted in the double-pulling-lock shell through a ratchet wheel shaft and a pawl shaft, the ratchet wheel is connected with a ratchet wheel torsion spring, and the pawl is connected with a pawl torsion spring. The ratchet wheel is provided with a locking groove, a full-locking protruding block and a half-locking protruding block, the pawl is provided with a locking protruding block matched with the full-locking protruding block and the half-locking protruding block, a translation base connected with an unlocking handle is arranged in the double-zipper shell and connected with a door opening reset torsion spring, and a rotatable unlocking block is arranged on the side, facing the pawl, of the translation base. One end of the pawl torsional spring abuts against the upper end of the unlocking block, a bending piece is arranged on the lower portion of the pawl, a limiting pushing block used for pushing the bending piece and limiting the unlocking block to rotate downwards is arranged on the translation base, and a front limiting block matched with the front end of the unlocking block is arranged in the double-zipper shell.

Description

Technical Field

[0001] This utility model relates to the field of car door lock technology, specifically a double-pull front cover lock. Background Technology

[0002] Cars and trams are common modes of transportation. As an important part of the vehicle, the traditional way to open the hood is to press the start switch inside the car and then manually press the switch on the hood to unlock it. Later, to make the operation easier, a double-pull unlocking method was developed, which only requires pulling the handle twice to unlock the door. Because the unlocking method has changed, the hood lock needs to be adjusted and improved. The existing double-pull lock structure is relatively complex, and the ratchet and pawl have been modified significantly, resulting in high production costs. Summary of the Invention

[0003] To solve the above-mentioned technical problems, this utility model provides a double-pull front cover lock, which has a simple structure, requires little modification to the ratchet and pawl, and is low in cost.

[0004] The technical solution is as follows: A double-pull front cover lock includes a double-pull lock housing. A ratchet and a pawl are respectively installed inside the double-pull lock housing via a ratchet shaft and a pawl shaft. The ratchet is connected to a ratchet torsion spring, and the pawl is connected to a pawl torsion spring. The ratchet is provided with a lock groove, a full-lock protrusion, and a half-lock protrusion. The pawl is provided with a locking protrusion that cooperates with the full-lock protrusion and the half-lock protrusion. The double-pull lock housing is characterized by a sliding seat connected to an unlocking handle. The sliding seat is connected to an opening and resetting torsion spring. A rotatable unlocking block is provided on the side of the sliding seat facing the pawl. One end of the pawl torsion spring abuts against the upper end of the unlocking block. A bending piece is provided at the lower part of the pawl. A limiting push block is provided on the sliding seat for pushing the bending piece and restricting the downward rotation of the unlocking block. A front limiting block that cooperates with the front end of the unlocking block is provided inside the double-pull lock housing.

[0005] A further feature is that the double zipper housing is provided with a guide groove that mates with the translation seat;

[0006] The unlocking block is connected to the translation seat via a pin.

[0007] The ratchet torsion spring and the door opening and reset torsion spring are the same torsion spring.

[0008] With this invention, the ratchet structure does not need to be modified. Only the pawl needs to be slightly modified, and a translation block and an unlocking block need to be installed inside the housing to complete the double-pull unlocking operation. The structure is simple and the cost is low. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the external structure of this utility model;

[0010] Figure 2 This is a schematic diagram of the internal structure of this utility model (fully locked state);

[0011] Figure 3 This is a schematic diagram of the translation seat structure;

[0012] Figure 4 This is a schematic diagram of the unlock block structure;

[0013] Figure 5 A schematic diagram of the pawl and ratchet (fully locked state);

[0014] Figure 6 The sequence diagram (front) of the unlocking process from full lock to half lock;

[0015] Figure 7 The sequence diagram (back side) shows the timeline from full lock to half lock during the unlocking process.

[0016] Figure 8 This is a sequence diagram (front) showing the process of unlocking from half-locked to fully open.

[0017] Figure 9 This is a timing diagram of the unlocking process from half-locked to fully open (back side). Detailed Implementation

[0018] See Figures 1-5 As shown, a double-pull car door lock includes a double-pull lock housing 1. A ratchet 4 and a pawl 5 are respectively mounted inside the double-pull lock housing 1 via a ratchet shaft 2 and a pawl shaft 3. The ratchet 4 is connected to a ratchet torsion spring 6, and the pawl 5 is connected to a pawl torsion spring 7. The ratchet 4 is provided with a lock groove 4-1, a full-lock protrusion 4-2, and a half-lock protrusion 4-3. The pawl 5 is provided with a locking protrusion 5-1 that cooperates with the full-lock protrusion 4-2 and the half-lock protrusion 4-3. A sliding seat 8 connected to an unlocking handle is provided inside the double-pull lock housing 1. The sliding seat 8 is connected to a door opening and reset torsion spring. Since the direction of movement of the sliding seat 8 after pulling the unlocking handle corresponds to the rotation direction of the ratchet 4, therefore… The door opening reset torsion spring and the ratchet torsion spring 6 are the same. The torsion spring body is sleeved on the ratchet shaft 2, one end abuts against the locking block 8-1 of the translation seat 8, and the other end abuts against the ratchet 4. The translation seat 8 is provided with a rotatable unlocking block 9 on the side facing the pawl 5. The translation seat 8 has an opening, and the unlocking block 9 is provided with a pin 9-1 that passes through the opening. One end of the pawl torsion spring abuts against the upper end of the unlocking block. The lower part of the pawl 5 is provided with a bending piece 5-2. The translation seat 8 is provided with a limiting push block 8-2 for pushing the bending piece 5-2 and limiting the downward rotation of the unlocking block 9. The double zipper housing 1 is provided with a front limiting block 1-1 that cooperates with the front end of the unlocking block 9.

[0019] The double zipper housing 1 is provided with guide grooves 1-2 that cooperate with the translation seat 8, so that the translation seat 8 can reliably translate and complete the unlocking state.

[0020] Unlocking involves two processes:

[0021] The first process is from the fully locked state to the partially locked state, see... Figure 6 and Figure 7 As shown, pulling the unlocking handle moves the translation seat 8 to the left. After a short free travel, the limiting push block 8-2 has not yet contacted the bending piece 5-2. Continuing to move, the limiting push block 8-2 contacts the bending piece 5-2 and pushes the bending piece 5-2 to move. The pawl 5 rotates clockwise, while the ratchet 4 remains stationary. During this process, the unlocking block 9 moves to the left along with the translation seat 8. Under the downward force of the pawl torsion spring 7, the front end of the unlocking block 9 disengages from the front limiting block 1-1. The unlocking block 9 rotates slightly counterclockwise and is restricted by the bending piece 5-2, preventing it from rotating further. After the translation seat 8 reaches its maximum travel, the locking protrusion 5-1 on the pawl 5 disengages from the fully locking protrusion 4-2 on the ratchet 4. Under the action of the ratchet torsion spring 6, the ratchet 4 rotates clockwise.

[0022] The second process is from the half-locked state to the fully open state. Release the door handle, and the sliding block 8 moves to the right to reset. The front end of the unlocking block 9 contacts the front limit block 1-1 and resets clockwise. When the ratchet 4 rotates clockwise until the half-locking protrusion 4-3 contacts the locking protrusion 5-1, it enters the half-locked state. (See...) Figure 8 and Figure 9 As shown, pulling the unlocking handle moves the sliding seat 8 to the left. Due to the half-lock state, the position of the pawl 5 changes, leaving space for the unlocking block 9 to rotate counterclockwise. The unlocking block 9 moves to the left with the sliding seat 8, and its front end disengages from the front limit block 1-1. Under the downward force of the pawl torsion spring 7, the unlocking block 9 rotates counterclockwise until it contacts the limit push block 8-2. As the sliding seat 8 moves the unlocking block 9 to the left, the unlocking block 9 abuts against the inner side of the bent piece 5-2 and pushes the pawl 5 to rotate clockwise for the second time, causing the locking protrusion 5-1 to disengage from the half-locking protrusion 4-3. Under the action of the ratchet torsion spring 6, the ratchet 4 rotates clockwise to the fully open state.

[0023] When the door handle is released, the sliding seat 8 moves to the right to reset. The unlocking block 9 is limited by the front limit block 1-1 and rotates clockwise to reset. The pawl 5 rotates counterclockwise to reset, and is limited by the pawl limit block 1-3 on the inner wall of the double zipper housing 1. A noise-reducing protective sleeve 4-4 is provided at the lock groove 4-1 of the ratchet 4.

[0024] The locking method uses existing mature technology. Since the translation seat 8 does not move, the unlocking block 9 also does not move. The lock is pressed down by external force, the ratchet 4 rotates counterclockwise, pressing the pawl 5 to rotate clockwise. The half-locking protrusion 4-3 passes over the locking protrusion 5-1, the pawl 5 resets counterclockwise, and the locking protrusion 5-1 contacts the half-locking protrusion 4-3 to achieve a half-lock. As the ratchet 4 is pressed down further, the full-locking protrusion 4-2 passes over the locking protrusion 5-1, the pawl 5 resets counterclockwise, and the locking protrusion 5-1 contacts the full-locking protrusion 4-2 to complete the locking.

Claims

1. A double-pull front cover lock, comprising a double-pull lock housing, wherein a ratchet and a pawl are respectively mounted inside the double-pull lock housing via a ratchet shaft and a pawl shaft, the ratchet is connected to a ratchet torsion spring, the pawl is connected to a pawl torsion spring, the ratchet is provided with a lock groove, a full-locking protrusion, and a half-locking protrusion, and the pawl is provided with a locking protrusion that cooperates with the full-locking protrusion and the half-locking protrusion, characterized in that, The double zipper housing is provided with a sliding seat that connects to the unlocking handle. The sliding seat is connected to a door opening and reset torsion spring. The sliding seat has a rotatable unlocking block on the side facing the pawl. One end of the pawl torsion spring abuts against the upper end of the unlocking block. A bending piece is provided at the lower part of the pawl. The sliding seat is provided with a limiting push block for pushing the bending piece and restricting the downward rotation of the unlocking block. The double zipper housing is provided with a front limiting block that cooperates with the front end of the unlocking block.

2. A dual pull storm cover lock according to claim 1, wherein, The double zipper housing is provided with a guide groove that cooperates with the translation seat.

3. A dual pull storm cover lock according to claim 1, wherein, The unlocking block is connected to the translation seat via a pin.

4. A dual pull storm cover lock according to claim 1, wherein, The ratchet torsion spring and the door opening and reset torsion spring are the same torsion spring.

Images