CN110644865B

CN110644865B - Automobile door lock mechanism

Info

Publication number: CN110644865B
Application number: CN201910954322.2A
Authority: CN
Inventors: 陈勇; 刘哲; 周永祥
Original assignee: SAIC General Motors Corp Ltd; Pan Asia Technical Automotive Center Co Ltd
Current assignee: SAIC General Motors Corp Ltd; Pan Asia Technical Automotive Center Co Ltd
Priority date: 2019-10-09
Filing date: 2019-10-09
Publication date: 2021-06-04
Anticipated expiration: 2039-10-09
Also published as: CN110644865A

Abstract

The invention discloses an automobile door lock mechanism which comprises a substrate, a spring bolt and a first pawl, wherein the spring bolt and the first pawl are arranged on the substrate, the spring bolt and the first pawl are matched with each other to realize a half-locking state and a full-locking state of the automobile door lock mechanism, and the direction of locking pressure of the spring bolt on the first pawl faces to the releasing direction of the first pawl. In one embodiment of the invention, because the pressure of the lock tongue on the first pawl points to the release direction of the first pawl, the lock tongue also moves along the ejection direction in the process of rotating the first pawl to the release direction, the pressure at the moment of disengagement on the meshed surface of the lock tongue and the first pawl is reduced, and the generated noise is low.

Description

Automobile door lock mechanism

Technical Field

The invention relates to the technical field of automobile door locks, in particular to an automobile door lock mechanism.

Background

The lock body, the lock catch and the actuating mechanism are the main components of the automobile door lock. The lock body is usually installed on the door of the automobile, has locking, unlocking, upper insurance and lower insurance functions, and is a main part of the door lock. The lock catch is generally installed on the vehicle body and is matched with the lock body to realize the locking function after the door is closed. The drive mechanism generally refers to the drive and transmission components that perform the door lock function.

In the lock body, a lock tongue and a pawl are mostly adopted to realize two working states of half locking and full locking. Corresponding to the two states, a half-lock contact surface and a full-lock contact surface are respectively arranged on the lock tongue. The door lock is closed and released through the cooperation between the pawl and the bolt.

In the closing process of the traditional automobile door lock, the spring bolt and the pawl have at least two impact actions, and each impact generates noise. After the door is closed, a certain contact pressure is generated on the meshing surface of the bolt and the pawl due to the action of the sealing force of the door, and in order to ensure the strength of the door lock, the direction of the pressure generally passes through the rotating center of the pawl, or the torque direction of the contact pressure is consistent with the meshing movement direction of the pawl. After release, the door lock sealing force disappears suddenly, and impact noise is generated between the lock tongue and the lock catch.

During the release of the door lock, the restraining effect on the bolt is generally removed by striking the pawl, which requires overcoming the frictional resistance on the engaging surface of the bolt and pawl. In the releasing process of the traditional automobile door lock, the force arm for poking the pawl to rotate is limited by the size of the pawl and is short, so that the releasing force is large.

Therefore, there is a need for an automotive door latch mechanism that effectively reduces noise and reduces door latch release force.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide the automobile door lock mechanism which effectively reduces noise and door lock release force.

The technical scheme of the invention provides an automobile door lock mechanism which comprises a substrate, a lock tongue and a first pawl, wherein the lock tongue and the first pawl are arranged on the substrate, the lock tongue and the first pawl are matched with each other to realize a half-locking state and a full-locking state of the automobile door lock mechanism, and the direction of locking pressure of the lock tongue on the first pawl faces to the releasing direction of the first pawl.

When the lock tongue rotates from the full-open position to the first position, a lock tongue meshing angle of the lock tongue is abutted against a first matching part of the first pawl, and the automobile door lock mechanism enters a half-lock state;

when the lock tongue continues to rotate to the second position, the lock tongue meshing angle of the lock tongue is abutted against the second matching part of the first pawl, and the automobile door lock mechanism enters a full-lock state.

Further, the automobile door lock mechanism further comprises a second pawl, and when the automobile door lock mechanism is in a full-locking state, the third matching portion of the first pawl is abutted to the fourth matching portion of the second pawl.

Further, automobile door lock mechanism still includes the release push rod, the release push rod includes extension arm and seventh cooperation portion, and in the release process, the extension arm drives the sixth cooperation portion of second pawl makes the second pawl with first pawl breaks away from, seventh cooperation portion promotes the fifth cooperation portion of first pawl drives first pawl with the spring bolt breaks away from, the spring bolt is reset to full open position by reset spring.

Further, the latch bolt engagement angle protrudes outward from the body of the latch bolt, and the first mating portion is a groove formed on the first pawl.

Further, the second matching part is a protrusion formed on the first pawl, and when the lock tongue rotates clockwise to the second position, the second matching part is located on the counterclockwise side of the first matching part.

Further, the third fitting portion is a projection formed on the first pawl, and the fourth fitting portion is a projection formed on the second pawl;

when the lock tongue rotates to the second position, the first pawl rotates towards the lock tongue, so that the third matching part rotates to a position abutted against the fourth matching part.

Further, the sixth matching part is a convex column extending from the second pawl, the seventh matching part is a groove formed on the release push rod, the fifth matching part is a convex column formed on the first pawl, and the fifth matching part is inserted into the seventh matching part.

Further, automobile door lock mechanism still includes first pivot, second pivot and third pivot, the spring bolt can wind first pivot is rotated, first pawl can wind the second pivot is rotated, the second pawl can wind the third pivot is rotated.

Further, the automobile door lock mechanism further comprises a first pawl return spring and a second pawl return spring, the first pawl return spring is used for resetting the first pawl to a full-open position, and the second pawl return spring is used for resetting the second pawl to a full-open position.

After adopting above-mentioned technical scheme, have following beneficial effect:

in one embodiment of the invention, because the pressure of the lock tongue on the first pawl points to the release direction of the first pawl, the lock tongue also moves along the ejection direction in the process of rotating the first pawl to the release direction, the pressure at the moment of disengagement on the meshed surface of the lock tongue and the first pawl is reduced, and the generated noise is small.

In another embodiment of the invention, the half-locking and full-locking engagement positions are integrated on the first pawl, so that the door locking strength can be improved, and the sound quality of the door lock switch can be improved.

In another embodiment of the invention, a release push rod for stirring the first pawl to rotate is added, so that the release force of the door lock is effectively reduced.

Drawings

The disclosure of the present invention will become more readily understood by reference to the drawings. It should be understood that: these drawings are for illustrative purposes only and are not intended to limit the scope of the present disclosure. In the figure:

FIG. 1 is a schematic view of an automotive door latch mechanism in a fully open position in accordance with an embodiment of the present invention;

FIG. 2 is a schematic view of an automotive door lock mechanism in a half-locked state in accordance with an embodiment of the present invention;

FIG. 3 is a schematic structural view of an automotive door lock mechanism in a fully locked state in accordance with an embodiment of the present invention;

FIG. 4 is a schematic view of an automotive door latch mechanism in a released state in accordance with an embodiment of the present invention;

FIG. 5 is a schematic front view of a deadbolt, first pawl and second pawl of an automotive door lock mechanism in a fully locked condition in accordance with an embodiment of the present invention;

FIG. 6 is a schematic reverse side view of a deadbolt, first pawl and second pawl of an automotive door latch mechanism according to an embodiment of the present invention in a fully latched state;

FIG. 7 is a schematic front view of a first pawl and a second pawl of an automotive door latch mechanism according to an embodiment of the present invention shown disengaged;

FIG. 8 is a schematic reverse side view of a first pawl and a second pawl of an automotive door latch mechanism according to an embodiment of the present invention shown disengaged;

FIG. 9 is a schematic front view of a first pawl of an automotive door latch mechanism disengaged from a deadbolt in accordance with an embodiment of the present invention;

fig. 10 is a schematic reverse side view of a first pawl of an automotive door latch mechanism disengaged from a deadbolt in accordance with an embodiment of the present invention.

Reference symbol comparison table:

1- -substrate

2- - -bolt

21-slot 22-bolt engaging angle

23- -tongue block prevention part

3- -first pawl

31-first fitting part 32-second fitting part

33-third fitting part 34-fifth fitting part

35- -eighth fitting part

4- -second pawl

41-fourth mating portion 42-sixth mating portion

5-first pawl Return spring 6-second pawl Return spring

7- - -first rotating shaft 8- - -second rotating shaft

9- -third rotating shaft

10-release push rod

101-extension arm 102-seventh mating portion

11-lock catch 12-lock bolt position limiter

Detailed Description

The following further describes embodiments of the present invention with reference to the accompanying drawings.

It is easily understood that according to the technical solution of the present invention, those skilled in the art can substitute various structures and implementation manners without changing the spirit of the present invention. Therefore, the following detailed description and the accompanying drawings are merely illustrative of the technical aspects of the present invention, and should not be construed as limiting or restricting the technical aspects of the present invention.

The terms of orientation of up, down, left, right, front, back, top, bottom, and the like referred to or may be referred to in this specification are defined relative to the configuration shown in the drawings, and are relative terms, and thus may be changed correspondingly according to the position and the use state of the device. Therefore, these and other directional terms should not be construed as limiting terms.

In this embodiment, as shown in fig. 1, the automobile door lock mechanism includes a substrate 1, a latch 2 and a first pawl 3, the latch 2 and the first pawl 3 are installed on the substrate 1, the latch 2 and the first pawl 3 cooperate with each other to realize a half-lock state and a full-lock state of the automobile door lock mechanism, and a direction of a locking pressure of the latch 2 to the first pawl 3 is toward a releasing direction of the first pawl 3.

In this embodiment, the first pawl 3 is integrated with a half-locking and full-locking engagement position, so that the door locking strength can be improved, and the sound quality of the door lock switch can be improved.

Specifically, as shown in fig. 1, the automobile door lock mechanism further includes a first rotating shaft 7, a second rotating shaft 8, and a third rotating shaft 9, the latch 2 can rotate around the first rotating shaft 7, the first pawl 3 can rotate around the second rotating shaft 8, and the second pawl 4 can rotate around the third rotating shaft 9.

As shown in fig. 1, the automobile door lock mechanism further includes a first pawl return spring 5 and a second pawl return spring 6, the first pawl return spring 5 is used for resetting the first pawl 3 to the fully open position, the second pawl return spring 6 is used for resetting the second pawl 4 to the fully open position, and a return spring (not shown) of the lock tongue 2 can reset the lock tongue 2 to the fully open position. That is, in the fully open state of the automobile door lock mechanism, the first pawl return spring 5, the second pawl return spring 6, and the return spring are in the natural state.

Wherein, spring bolt 2 still includes the spring bolt and prevents hindering the portion, and the spring bolt prevents hindering the portion and prevents hindering the protrusion towards first pawl 3, can prevent that first pawl 3 from getting into the motion envelope of spring bolt 2, and the motion of spring bolt 2 just can not be blockked.

Further, as shown in fig. 2, fig. 2 shows a half-lock state of the automobile door lock mechanism. When the latch 2 rotates from the fully open position to the first position, the latch engagement angle 22 of the latch 2 abuts against the first engagement portion 31 of the first pawl 3, and the automobile door lock mechanism enters a half-lock state.

In this embodiment, the tongue engagement angle 22 protrudes outward from the body of the tongue 2, and the first engagement portion 31 is a groove formed on the first pawl 3.

Specifically, the locking tongue 2 is provided with a clamping groove 21, the latch 11 is arranged in the clamping groove 21, the latch 11 is used for driving the locking tongue 2 to rotate along the clockwise direction of fig. 2, so that the locking tongue 2 rotates to the first position from the fully open position, the locking tongue meshing angle 22 of the locking tongue 2 is abutted to the first matching portion 31 of the first pawl 3, and the automobile door lock mechanism enters a half-lock state. In the half-locked state, the first pawl 3 and the second pawl 4 are not moved.

As shown in fig. 3, the latch 11 continues to drive the latch 2 to rotate clockwise, so that the latch 2 continues to rotate to the second position, the latch engagement angle 22 of the latch 2 abuts against the second engagement portion 32 of the first pawl 3, and the automobile door lock mechanism enters the full-lock state.

At this time, the first pawl 3 also rotates clockwise (i.e., toward the latch 2) so that the third mating portion 33 of the first pawl 3 interferes with the fourth mating portion 41 of the second pawl 4.

In this embodiment, the second matching portion 32 is a protrusion formed on the first pawl 3, and when the locking tongue 2 rotates clockwise to the second position, the second matching portion 32 is located on the counterclockwise direction side of the first matching portion 31.

In the present embodiment, the third fitting portion 33 is a projection formed on the first pawl 3, and the fourth fitting portion 41 is a projection formed on the second pawl 4.

As shown in fig. 3, the automobile door lock mechanism further includes a latch bolt position limiter 12 for preventing the latch bolt 2 from continuing to rotate in the opening direction when the latch bolt 2 is in the full-lock state.

Further, as shown in fig. 4, the automobile door lock mechanism further includes a release push rod 10, the release push rod 10 includes an extension arm 101 and a seventh matching portion 102, in the release process, the extension arm 101 drives the sixth matching portion 42 of the second pawl 4 to separate the second pawl 4 from the first pawl 3, the seventh matching portion 102 pushes the fifth matching portion 34 of the first pawl 3 to separate the first pawl 3 from the latch bolt 2, and the latch bolt 2 is reset to the full open position by a reset spring (not shown in the figure).

In this embodiment, the sixth mating portion 42 is a convex pillar extending from the second pawl 3, the seventh mating portion 102 is a concave groove formed on the release rod 10, the fifth mating portion 34 is a convex pillar formed on the first pawl 3, and the fifth mating portion 34 is inserted into the seventh mating portion 102.

Specifically, as shown in fig. 5 to 6, the release push rod 10 is coaxially installed with the first pawl 3, and both rotate around the second rotating shaft 8. The release rod 10 is located on the front side of the first pawl 3, the fifth mating portion 34 of the first pawl 3 is inserted into the seventh mating portion 102 from the rear, the seventh mating portion 102 is a long slot in a kidney shape, and the fifth mating portion 34 can slide in the seventh mating portion 102 for a certain stroke.

In the fully locked state, as shown in fig. 5, the extension arm 101 and the sixth fitting portion 42 are not yet in contact.

As shown in fig. 7, when switching from the full lock state to the release state, the release push rod 10 rotates counterclockwise in fig. 7, and after the extension arm 101 rotates to contact the sixth mating portion 42, the second pawl 4 is pushed, so that the second pawl 4 also rotates counterclockwise, and the second pawl 4 is disengaged from the first pawl 3.

As shown in fig. 8, after the second pawls 4 are disengaged from the first pawls 3, the fourth engaging portions 41 are not in contact with the third engaging portions 33.

As shown in fig. 9, the release rod 10 continues to rotate counterclockwise, and at this time, the fifth matching portion 34 slides to the lowest end of the seventh matching portion 102, and the release rod 10 drives the first pawl 3 to separate from the lock tongue 2.

As shown in fig. 10, latch bolt engagement angle 22 is not in contact with second mating portion 32.

After the first pawl 3 is separated from the bolt 2, the bolt 2 rotates counterclockwise under the action of the return spring to return to the fully open position shown in fig. 1.

At this time, the release push rod 10 is no longer in operation, and the first pawl 3 is rotated in the direction of the latch tongue 2, i.e., clockwise, by the first pawl return spring 5, and is returned to the fully open position of fig. 1.

The second pawl 4 is rotated in the direction of the first pawl 3, i.e., clockwise, by the second pawl return spring 6 to return to the fully open position of fig. 1.

During the resetting, the fourth mating portion 41 of the second pawl 4 slides along the eighth mating portion 35 (see fig. 1) of the first pawl 3.

In this embodiment, the operation of the automobile door lock mechanism on the automobile door is as follows:

the action process of closing the door is as follows: the door of the automobile is subjected to the closing force to drive the door lock to move relative to the automobile body. Under the full-open state, the lock catch 11 pushes the bolt 2 to rotate clockwise around the first rotating shaft 7 until the bolt meshing angle 22 abuts against the first matching part 31, and the half-lock state is achieved; if the vehicle door continues to do door closing movement relative to the vehicle body, the lock catch 11 pushes the bolt 2 to rotate clockwise, the bolt meshing angle 22 is separated from the first matching part 31, and the door lock is separated from a half-lock state; when the tongue engaging angle 22 abuts against the second engaging portion 32, the fourth engaging portion 41 abuts against the third engaging portion 33, so as to achieve a full-locking state.

The action process of opening the door is as follows: when the user applies the door opening force, the release push rod 10 moves in the release direction, and the first extension arm 101 pushes the sixth matching portion 42 to drive the second pawl 4 to disengage from the first pawl 3. When the second pawl 4 is disengaged from the first pawl 3, the seventh engaging portion 102 pushes the fifth engaging portion 34 on the first pawl 3 to drive the first pawl 3 to disengage from the bolt 2. After disengaging, the bolt 2 moves to the full open position under the action of the return spring.

In this embodiment, because the pressure (towards the top of fig. 3) of the bolt 2 to the first pawl 3 points to the releasing direction (towards the top of fig. 4) of the first pawl 3, in the process that the first pawl 3 rotates towards the releasing direction, the bolt 2 also moves along the ejecting direction (namely, the counterclockwise direction), so that the disengaging instantaneous pressure on the meshed surface of the bolt 2 and the first pawl 3 is reduced, and the generated noise is small.

The foregoing is considered as illustrative only of the principles and preferred embodiments of the invention. It should be noted that, for those skilled in the art, several other modifications can be made on the basis of the principle of the present invention, and the protection scope of the present invention should be regarded.

Claims

1. An automobile door lock mechanism comprises a substrate, a lock tongue and a first pawl, wherein the lock tongue and the first pawl are mounted on the substrate, and the automobile door lock mechanism is characterized in that the lock tongue and the first pawl are matched with each other to realize a half-locking state and a full-locking state of the automobile door lock mechanism, and the direction of locking pressure of the lock tongue on the first pawl faces to the releasing direction of the first pawl; when the lock tongue rotates to a first position along a direction from a full-open position, a lock tongue meshing angle of the lock tongue is abutted against a first matching part of the first pawl, and the automobile door lock mechanism enters a half-lock state;

when the lock tongue continues to rotate to a second position along the same direction, a lock tongue meshing angle of the lock tongue is abutted against a second matching part of the first pawl, and the automobile door lock mechanism enters a full-lock state;

the automobile door lock mechanism further includes a second pawl,

when the lock is in a half-locking state, the first pawl and the second pawl are separated and fixed;

and when the locking mechanism is in a full locking state, the third matching part of the first pawl is abutted against the fourth matching part of the second pawl.

2. The automobile door lock mechanism according to claim 1, wherein the automobile door lock mechanism further comprises a release push rod, the release push rod comprises an extension arm and a seventh engaging portion, during release, the extension arm drives the sixth engaging portion of the second pawl to disengage the second pawl from the first pawl, the seventh engaging portion pushes the fifth engaging portion of the first pawl to disengage the first pawl from the latch tongue, and the latch tongue is reset to a fully open position by a reset spring.

3. An automobile door lock mechanism according to claim 1, wherein said tongue engagement angle protrudes outward from a body of said tongue, and said first engagement portion is a recess formed on said first pawl.

4. An automobile door lock mechanism according to claim 1, wherein said second engagement portion is a projection formed on said first pawl, and said second engagement portion is located on a counterclockwise side of said first engagement portion when said lock tongue is rotated clockwise to said second position.

5. An automobile door lock mechanism according to claim 1, characterized in that said third engaging portion is a projection formed on said first pawl, and said fourth engaging portion is a projection formed on said second pawl;

6. An automobile door lock mechanism according to claim 2, characterized in that said sixth engagement portion is a boss extending from said second pawl, said seventh engagement portion is a groove formed on said release push rod, said fifth engagement portion is a boss formed on said first pawl, and said fifth engagement portion is inserted into said seventh engagement portion.

7. An automobile door lock mechanism according to claim 1, wherein the automobile door lock mechanism further comprises a first rotating shaft, a second rotating shaft and a third rotating shaft, the latch bolt can rotate around the first rotating shaft, the first pawl can rotate around the second rotating shaft, and the second pawl can rotate around the third rotating shaft.

8. An automobile door lock mechanism according to claim 1, further comprising a first pawl return spring for returning said first pawl to a fully open position and a second pawl return spring for returning said second pawl to a fully open position.