CN1987028B - car door lock - Google Patents

Abstract

The invention provides an automobile door lock, which comprises a lock body, a lock catch and a driving mechanism, wherein the lock body includes a clamping plate and a first pawl matched with the clamping plate, and the feature is that the lock body also includes A second ratchet that cooperates with the clamping plate. In the automobile door lock of the present invention, since there are two ratchets to cooperate with the clamping plate, the automobile door lock can have three states of half locking, intermediate locking and full locking, which can significantly improve the locking performance of the automobile door lock. tightness.

Description

car door lock

technical field

The present invention relates to locks, and more particularly to automobile door locks.

Background technique

The car door lock mainly includes a lock body, a lock catch and a driving mechanism. The lock body is the main part of the door lock and is generally installed on the car door. The lock buckle (sometimes also called a lock ring or a lock pin) is a part that cooperates with the lock body, and is usually installed on the vehicle body to correspond to the lock body. The driving mechanism refers to the transmission components of actions and forces such as key unlocking and handle unlocking.

At present, most of the lock bodies adopt a counter force two-part structure, and two states of semi-locking and full-locking can be easily realized through a clamping plate and a pawl.

Fig. 1 is a schematic diagram of a lock body in a half-locked state in the prior art, and Fig. 2 is a schematic diagram of a lock body in a fully locked state in the prior art.

As shown in FIG. 1 , the lock body mainly includes a clasp 7 and a pawl 8 , the clasp 7 can rotate around the clasp hinge 1 , and the pawl 8 can rotate around the pawl hinge 2 . When the lock body is in the semi-locked state, the first engaging surface 7b of the card plate 7 engages and locks with the locking surface 8a of the pawl 8, so that the lock catch is locked by the lock hook of the card plate 7, that is, the door is locked. Locked in a semi-locked state.

When the force of closing the door is relatively large, due to the large impact force received, the clockwise rotation of the clamp 7 is relatively large, and the first engaging surface 7b will cross the locking surface 8a of the ratchet 8, so that the second of the clamp 7 The engaging surface 7a reaches the position of the locking surface 8a of the pawl 8 and locks with it, as shown in FIG. 2 . At this time, the lock body is in a fully locked state, that is, the door is completely locked on the vehicle body through the engagement between the lock hook of the clamp plate 7 and the lock buckle.

When unlocking with a key or door opening handle, etc., through the transmission of the driving mechanism, the force of unlocking is transmitted to the pawl 8, so that the pawl rotates counterclockwise in the drawing, and the meshing surface is separated from the locking surface, thereby Release the restraint to the clamping plate 7, and then the clamping plate 7 rotates counterclockwise under the elastic force of its return spring (the return spring is usually arranged at the hinge shaft 1 of the clamping plate), thereby releasing the locking of the clamping plate to the lock catch, The door can be opened.

Through the traditional automobile door lock with the above structure, two states of half-locked and fully-locked can be easily realized, and the structure is simple.

However, in this traditional automobile door lock, through the cooperation between the clamping plate and the pawl, the lock body only has two states of half-locked and fully locked. Therefore, in the locked state of the door lock, the The strength is not high. When an accident occurs and the vehicle body is deformed or the door lock is subjected to a large impact force, the door lock may be destroyed, thereby causing the occupants in the car to be thrown out of the car.

In addition, in the operation of this kind of traditional car door lock, because the reaction force of the door of different cars varies greatly, when closing the door, if the door reaction force of a certain type of car is relatively large, the passenger may be due to the force applied when closing the door. It is too small to lock the door lock in the fully locked position, and the load that the half lock can bear is much smaller than that of the full lock, so there will be safety hazards when the door is not closed tightly.

Contents of the invention

The object of the present invention is to provide an automobile door lock with improved strength.

The automobile door lock of the present invention includes a lock body, a lock catch and a driving mechanism, wherein the lock body includes a clamp plate and a first pawl matched with the clamp plate, the first pawl has a protruding locking surface, and the clamp The plate has a first engaging surface and a second engaging surface corresponding to the locking surface, and it is characterized in that the lock body also includes a second pawl that cooperates with the clamping plate, and the second pawl It includes a locking hook, which cooperates with the first engaging surface of the clamping plate, and the first pawl and the second pawl are linked through a linkage mechanism and cooperate with the clamping plate, so that the car door lock has half There are three locking states: locked, middle locked, and fully locked.

In the automobile door lock of the present invention, since there are two ratchets to cooperate with the clamping plate, the automobile door lock can have three states of half locking, intermediate locking and full locking, which can significantly improve the locking performance of the automobile door lock. tightness.

Description of drawings

Fig. 1 is a schematic diagram of a half-locked state of an existing automobile door lock;

Fig. 2 is a schematic diagram of a fully locked state of an existing automobile door lock;

Fig. 3 is a schematic diagram of a semi-locked state of the automobile door lock of the present invention;

Fig. 4 is a schematic diagram of the intermediate locking state of the automobile door lock of the present invention;

Fig. 5 is a schematic diagram of the fully locked state of the automobile door lock of the present invention;

Figure 6 is a rear perspective view of Figure 5;

Fig. 7 is a perspective view of the second pawl in the automobile door lock of the present invention;

Fig. 8 is an assembly perspective view of the second pawl and the second pawl handle;

Fig. 9 is a perspective view of the middle rod in the automobile door lock of the present invention;

Fig. 10 is a perspective view of the first pawl handle in the automobile door lock of the present invention;

Fig. 11 is the assembly diagram of the linkage mechanism in the automobile door lock of the present invention;

Fig. 12 is a schematic diagram of the unlocked state of the automobile door lock of the present invention;

Figure 13 is a schematic diagram of the reverse side of Figure 12;

Fig. 14 is a fully locked state diagram of the automobile door lock according to the second embodiment of the present invention;

Figure 15 is a schematic diagram of the reverse side of Figure 13;

Fig. 16 is a schematic diagram of the unlocked state of the car door lock according to the second embodiment of the present invention.

Explanation of main symbols:

1, 2, 3, 4, 5, 6——hinge shaft

7——Card board

8 - first pawl

9 - second pawl

10——The first ratchet handle

11 - middle pole

12——The second ratchet handle

Detailed ways

Specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

The automobile door lock of the present invention includes a lock body, a lock catch and a driving mechanism, wherein the lock body includes a clamping plate 7 and a first pawl 8 that cooperates with the clamping plate 7, and the lock body also includes a latch that cooperates with the clamping plate 7. Second pawl 9.

Since the invention of the present invention mainly lies in the improvement of the lock body in the automobile door lock, and any existing suitable structure can be adopted for the buckle and driving mechanism, the lock body of the present invention will be mainly described below. For example, the lock catch can adopt existing structures such as a lock ring, a lock pin, and a lock bar. The driving mechanism can be a power source such as a key or a motor, and an intermediate transmission member such as a connecting rod or a wire drawing.

The cooperation between the clamping plate 7 and the first ratchet 8 can adopt the existing technology, for example, as described in the background of the present invention, the locking and locking of the automobile door lock can be realized through the cooperation between the engaging surface and the locking surface. unlock. The main inventive point of the present invention is to increase the second pawl 9 and parts related thereto. In the following, for the sake of completeness of the description, the lock body structure of the present invention will be described in detail, including the description of the clamping plate 7 and the first pawl 8 .

Fig. 3 is a schematic diagram of a semi-locked state of the automobile door lock of the present invention. As shown in FIG. 3 , the clamping plate 7 is hinged on an automobile lock body such as a mounting plate (not shown) of an automobile door lock through a hinge shaft 1 and can rotate around the hinge shaft. A return spring (not shown) is arranged between the clamping plate 7 and the hinge shaft 1, so that the clamping plate 7 always has a tendency to rotate around the hinge shaft 1 counterclockwise in FIG. 3 .

The first ratchet 8 and the first ratchet handle 10 are hinged together in the lock body such as the door lock mounting plate by the hinge shaft 2. On the first ratchet handle 10, an arc boss 10a is arranged, and on the arc boss 10a Extended steps 10b, 10c are respectively provided at the two ends. The first ratchet 8 and the ratchet handle 10 can be linked with each other through the tight fit between the arc boss 10a and the two extended steps 10b, 10c and the first ratchet 8 . That is, when the ratchet handle 10 is driven to rotate through the linkage mechanism, the first ratchet 8 can be driven to rotate simultaneously.

Apparently, realizing the linkage between the clamping plate 7 and the first pawl 8 through the arc boss and the extending step is only a specific embodiment of the present invention. In addition, a variety of structures can also be used to realize the linkage between the two, such as fastening the two together through fasteners, or connecting the two together through the cooperation of the pin and the slot, etc. wait.

There is a protruding locking surface 8a on the first pawl 8, and there are corresponding first engaging surfaces 7b and second engaging surfaces 7a on the card plate 7, and these two engaging surfaces can engage with the locking surfaces, thereby Lock the door lock in the corresponding locked state.

A return spring (not shown) can be arranged between the ratchet handle 10 and the hinge shaft 2, so that the first ratchet 8 and the ratchet handle 10 always have a tendency to rotate clockwise around the hinge shaft 2 as shown in FIG. .

The second ratchet 9 is hinged in the lock body by the hinge shaft 3, and a return spring (not shown) can be set between the hinge shaft 3 and the second ratchet 9, so that the second ratchet 9 is always around the hinge shaft 3 according to the The trend of counterclockwise rotation in Figure 3.

The second pawl 9 has a locking hook 9 a, which can be engaged with the first engaging surface 7 b on the clamping plate 7 , as shown in FIG. 4 .

Therefore, through the cooperative relationship between the first ratchet 8 and the second ratchet 9 and the clamping plate 7, the automobile door lock of the present invention can have three locking states of half locking, intermediate locking and full locking, thereby The locking strength of the automobile door lock of the invention can be significantly improved, and the driving safety factor can be improved.

When the passenger exerts a small force on the door, the door is not enough to overcome the reaction force of the door, and the door lock clamp plate 1 collides with the buckle (not shown) of the side wall, so that the clamp plate 1 rotates around the hinge axis in FIG. 3 under the impact energy. 1 Rotate clockwise, because the applied force is very small, the card plate 7 overcomes the spring force of the clockwise rotation tendency of the first pawl 8 during the clockwise rotation, and the first meshing surface 7b of the card plate 7 and the first pawl 8 After the locking surfaces 8a of the locking surfaces 8a are contacted and engaged, the movement of the clamping plate stops. At this time, the clamping plate 7 has a tendency to rotate counterclockwise under the action of the elastic force of its own return spring, and the first pawl 8 is under the action of the elastic force of its own spring. There is a tendency to turn clockwise, so the door lock is in a half-locked state, as shown in Figure 3.

Fig. 4 is a schematic diagram of the intermediate locking state of the automobile door lock of the present invention. When the passenger's force to close the door is large but not enough to overcome the reaction force of the door when the door is fully closed, the door is still slightly open. At this time, the impact energy received by the door lock clip 7 and the side wall lock is greater than that in the aforementioned semi-locked state, so when the clip 7 rotates clockwise, the engagement step 7b crosses the locking surface 8a of the first pawl 8, It directly engages with the locking hook 9a of the second pawl 9, as shown in FIG. 4 . After meshing, because the clamping plate 7 and the second pawl 9 have a tendency to rotate counterclockwise around their respective hinge shafts under the action of their return springs, they engage and lock each other, and the door lock is in an intermediate locking state. The corresponding locking surface 8a is disengaged from the first engaging surface 7b, and the first pawl 8 has a tendency to rotate clockwise in FIG. plate 7.

Fig. 5 is a schematic diagram of the fully locked state of the automobile door lock of the present invention. When the force of the passenger to close the door is greater, the second engaging surface 7a will go over the locking surface 8a of the first ratchet 8 and engage with it when the card plate 7 rotates clockwise. After meshing, because the clamping plate 7 and the first pawl 8 all have a tendency to rotate counterclockwise around their respective hinge shafts under the action of their return springs, they engage and lock each other, and the door lock is in a fully locked state.

In addition, in another embodiment of the present invention, a contact switch can be set in the lock body to detect the information that the clamping plate 7 is in the middle locking position, and then use the solenoid valve to perform the full locking action of the clamping plate 7 . When the occupant closes the door with little force, the door is slightly open, and the clamp is in the middle locked position as shown in Figure 4. At this time, the boss 7c (see Figure 6) on the back of the clamp touches the contact switch, and the switch Send the position signal to the control unit, and then the solenoid valve receives the full locking command to continue to rotate the control card 7 clockwise until the second engaging surface 7a of the card 7 engages and locks with the locking surface 8a of the first pawl , the corresponding first engaging surface 7b is disengaged from the locking hook 9a.

The principle of the electromagnetic valve to execute the rotation of the clamping plate can adopt the known motor worm gear method or the pneumatic bellows method, which will not be described in detail here.

Referring to FIG. 7 , the second pawl 9 is hinged in the door lock such as a door lock mounting plate through the hinge shaft 3 and can rotate around the hinge shaft 3 . A return spring can be arranged on the hinge shaft 3 so that the second pawl 9 always has a tendency to rotate counterclockwise as shown in FIG. 3 . One end of the second pawl 9 may have the above-mentioned locking hook 9a, and the other end may have the above-mentioned boss 9b.

FIG. 8 is an assembly perspective view between the second pawl 9 and the second pawl handle 12 . As shown in the figure, the second pawl handle 12 can be hinged in the door lock through the hinge shaft 5 . The second ratchet handle 12 has an arc-shaped sliding slot 12a, wherein the boss 9b of the second ratchet 9 protrudes into the sliding slot 12a.

FIG. 9 is a perspective view of the intermediate rod 11 according to the first embodiment of the present invention. One end of the intermediate rod 11 has a boss 11 a, and the other end is mounted together with the second ratchet handle 12 through the hinge shaft 6 .

Fig. 10 is a perspective view of the first ratchet handle 10 of the first embodiment of the present invention, which is fixed in the door lock on the same hinge axis 2 as the first ratchet 8, and can rotate around the hinge axis 2. A return spring may be provided, and the return spring may make the first pawl 8 and the first pawl handle 10 always have a tendency to rotate clockwise around the hinge axis as shown in FIG. 4 . The first ratchet handle 10 is provided with an arc boss 10a and extended steps 10b, 10c located at both ends of the arc boss, and the arc boss and the extension steps are in close contact with the first ratchet 8 (see Figure 4) , making it linked. In addition, one end of the first ratchet handle 10 is provided with an oblong sliding groove 10d, and the boss 11a of the above-mentioned intermediate rod 11 extends into the sliding groove 10d.

Fig. 11 is a schematic diagram of assembly of the linkage mechanism of the present invention. As shown in the figure, the boss 11a at one end of the middle rod 11 is located in the slide groove 10d at one end of the first ratchet handle 10 and can slide therein. The other end of the middle rod 11 is fixed with the lower end of the second ratchet handle 12 through the hinge shaft 6 , for example riveted together or welded together, or the connecting rod 11 can even be integrally formed with the lower end of the second ratchet handle 12 . The protrusion 9b at one end of the second ratchet 9 is accommodated in the slide groove 12a of the second ratchet handle 12 and can slide therein.

When the door lock structure of the present invention is installed on the car door, it can be opened or locked through the operation of opening the door or opening the door through a conventional driving mechanism. The specific door opening operation is not the invention point of the present invention, and the general door lock principle can be adopted, so there is no detailed description and illustration. Regardless of whether the inner handle or the outer handle is operated, the door is finally opened and unlocked by the door opening link (not shown) in the drive mechanism. For example, for the fully locked state shown in Figure 5, the door handle or the door handle is operated, and the door opening link (not shown) passes through the step 10e of the ratchet handle 10 in the direction of the arrow in Figure 5 (see Figure 10 ) makes the ratchet handle 10 start to rotate counterclockwise, and at the same time overcomes the elastic force of its own return spring and drives the first ratchet 8 around the hinge shaft 2 through the arc boss 10a and the extended steps 10b and 10c according to the counterclockwise direction in Figure 5 turn. 6, when the first pawl handle 10 rotates clockwise around the hinge shaft 2 in FIG. 6 view), during the movement of the middle lever 11, because the hinge shaft 6 is riveted with the second ratchet handle 12, the second ratchet handle 12 rotates counterclockwise around the hinge shaft 5 through the riveted hinge shaft 6 linkage (Figure 6 view), the arc-shaped chute 12a of the second ratchet handle 12 drives the second ratchet 9 to rotate counterclockwise around the hinge shaft 3 (view in Figure 6) by pushing the boss 9b extending into it during rotation, that is, the lock The stop hook 9a rotates away from the engaging surface of the clamping plate 7. When the door opening action is completed, the first pawl 8 and the second pawl 9 are disengaged from the two engaging surfaces 7a and 7b of the clamping plate, as shown in Figure 12. After the unlocking action is completed, the clamping plate disengages from the constraints of the first and second ratchets, and rotates clockwise around the hinge shaft 1 (direction in FIG. 12 ) under the action of the return spring to open the door.

Fig. 13 is a schematic diagram of the unlocked state of the automobile door lock of the present invention. As shown in the figure, after the door is opened, the opening handle is released, and the first pawl 8 and the second pawl 9 rotate clockwise and counterclockwise around their respective hinge shafts (see Figure 13) under the action of the return spring, and the linkage mechanism (comprising the first ratchet handle 10, the middle lever 11, the second ratchet handle 12) also return to the original position, so far add the foregoing, and the automobile door lock of the present invention has completed the door unlocking process.

In addition, regarding the linkage mechanism in the automobile door lock of the present invention, as mentioned above, various specific mechanical mechanisms can be used to realize it. In the above embodiments, in order to explain the principle of the present invention, the structure of the present invention is described in detail. As an example, another embodiment of the linkage mechanism in the automobile door lock of the present invention will be described below. In this embodiment, only the local features and connection methods of the intermediate rod 11 and the ratchet handle 10 of the first embodiment have been modified. Repeat the introduction.

FIG. 14 is a schematic view of the fully locked state of the second embodiment of the present invention, and FIG. 15 is a schematic view of the reverse side of FIG. 14 . As shown in the figure, the middle rod 11 is riveted with the first ratchet handle 10 at the hinge shaft 4 , and riveted with the second ratchet handle 12 at the hinge shaft 6 . That is, the two ends of the middle rod 11 are fixed together with the two ratchet handles respectively. In the process of door opening and unlocking, the movement principle and action sequence of the components of the second embodiment are the same as those of the aforementioned first embodiment. The ratchet restrains the clamping plate to achieve the purpose of opening the door.

Because the automobile door lock of the present invention has double ratchet locking, can have three locking states of semi-locking, intermediate locking and full locking, so the strength is much higher than similar door locks.

The motor vehicle door lock according to the invention is preferably used on motor vehicle doors and on the trunk lid of motor vehicles. Can also be used on other doors if desired, such as normal domestic doors.

In addition, the full locking can also be controlled by the solenoid valve, so the operation is more convenient and reliable, and the safety factor is greatly improved, and the main design platform of the automobile door lock of the present invention is not separated from the general door lock, so the application range is wide and the structure is simple. The upgrade and change of similar locks for this structure or redesign has high feasibility and promotion value.

Claims (7)

1. A car door lock, comprising a lock body, a lock catch and a drive mechanism, wherein the lock body comprises a clamp (7) and a first pawl (8) cooperating with the clamp, the first pawl (8) There is a protruding locking surface (8a) on it, and the clamping plate (7) has a first engaging surface (7b) and a second engaging surface (7a) corresponding to the locking surface (8a), which are characterized in that , the lock body also includes a second pawl (9) cooperating with the card plate (7), the second pawl (9) includes a locking hook (9a), the locking hook and the card The first engaging surface (7b) of the plate (7) cooperates, and the first pawl (8) and the second pawl (9) are linked through the linkage mechanism and cooperate with the clamp plate (7), so that the car door lock It has three locking states: half-locked, middle-locked and full-locked. 2. The automobile door lock as claimed in claim 1, wherein said linkage mechanism comprises a first ratchet handle (10), a second ratchet handle (12) and an intermediate lever (11), and the first ratchet handle ( 10) Installed on the first ratchet (8) to link with the first ratchet, the second ratchet handle (12) is installed on the second ratchet (9) to link with the second ratchet, and the middle rod (11) is connected Between the first ratchet handle (10) and the second ratchet handle (12). 3. The automobile door lock according to claim 2, wherein the first pawl handle (10) and the first pawl (8) are hinged together in the lock body through the second hinge shaft (2), in the first The ratchet handle (10) has an arc boss (10a) and extended steps (10b and 10c) at both ends of the arc boss (10a), and part of the outer surface of the first ratchet (8) is in contact with the circle. The arc boss (10a) and the extension steps (10b and 10c) fit together. 4. The automobile door lock according to claim 3, wherein the second ratchet handle (12) is hinged in the lock body through the fifth hinge shaft (5), and the second ratchet (9) is hinged through the third hinge shaft (3) Hinged in the lock body, there is a groove (12a) on the second pawl handle (12), and a protrusion (9b) on the second pawl (9), and the protrusion (9b) is inserted into the groove (12a). 5. The automobile door lock as claimed in claim 4, wherein one end of the intermediate rod (11) is fixed to the lower end of the second pawl handle (12), and the upper end of the intermediate rod (11) has a protrusion (11a), There is a groove (10d) at the extended end of the first ratchet handle (10), and the protrusion (11a) at the upper end of the middle rod (11) is inserted into the groove (10d) at the extended end of the first ratchet handle. 6. The automobile door lock as claimed in claim 4, wherein one end of the intermediate rod (11) is fixed to the extended end of the first pawl handle (10), and the other end of the intermediate rod (11) is connected to the second ratchet handle. The lower end of claw handle (12) is fixed. 7. The automobile door lock as claimed in claim 1, wherein the automobile door lock also comprises a contact switch, a solenoid valve and a driving element, wherein the contact switch is located in the lock body, and has a contact with the contact on the clamping plate (7). The boss (7c) corresponding to the switch position, the contact switch is used to send the position information of the boss to the solenoid valve, and the solenoid valve controls the driving element to drive the clamping plate to rotate.

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