CN109356471B

CN109356471B - Unlocking mechanism and automobile door lock

Info

Publication number: CN109356471B
Application number: CN201811588545.3A
Authority: CN
Inventors: 吴何畏; 管飞; 马孝林; 陈刚; 吴限好; 詹迎晟; 刘星语
Original assignee: Hubei University of Arts and Science
Current assignee: Hubei University of Arts and Science
Priority date: 2018-12-25
Filing date: 2018-12-25
Publication date: 2020-04-07
Anticipated expiration: 2038-12-25
Also published as: CN109356471A

Abstract

The invention discloses an unlocking mechanism and an automobile door lock, and relates to the technical field of automobiles. The unlocking mechanism comprises a gear screw and a claw which are meshed with each other. The gear screw is including being provided with the bellied pivot of spiral, and the jack catch includes meshing portion and the first spacing portion that is used for restricting the gear screw rotation. The unlocking mechanism is provided with a meshing part meshed with the spiral protrusion, the gear screw drives the jaw to rotate towards a first direction in a first state, the jaw is matched with the spiral protrusion in a limiting part and is limited, and the jaw rotates towards a second direction opposite to the first direction under the action of external force to reset in a second state. This unlocking mechanism design benefit, it is reasonable, through the spiral boss and the rotatory boss of gradually opening that design on the gear screw rod, make the part quantity significantly reduced of whole mechanism, convenient assembly, reduction in production cost.

Description

Unlocking mechanism and automobile door lock

Technical Field

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

Background

At present, most of door locks on automobiles at home and abroad adopt electric door locks, a high-speed motor in a lock body is utilized to realize power output transmission through a transmission mechanism, the door locks are limited by the requirement of a design space, high-speed rotating motion of the motor is converted into reciprocating small-angle swing of a swing arm on the lock body, and multi-stage parts are required in the middle to realize speed reduction.

In the manufacturing process of these parts, the assembly process and the control process are complicated, which results in high production cost.

Disclosure of Invention

The invention aims to provide an unlocking mechanism which reduces the number of parts of the mechanism, is convenient to assemble and reduces the production cost.

The embodiment of the invention is realized by the following steps:

based on the above purpose, an embodiment of the present invention provides an unlocking mechanism, which includes a gear screw and a jaw, which are engaged with each other, wherein the gear screw includes a rotating shaft provided with a spiral protrusion, and the jaw includes an engaging portion and a first limiting portion for limiting rotation of the gear screw;

the unlocking mechanism is provided with a first state that the meshing part is meshed with the spiral protrusion, the gear screw drives the clamping jaw to rotate towards a first direction, and a second state that the first limiting part is matched with the spiral protrusion to limit, and the clamping jaw rotates and resets towards a second direction opposite to the first direction under the action of external force.

In addition, the unlocking mechanism provided by the embodiment of the invention can also have the following additional technical characteristics:

in an alternative embodiment of the invention, the pitch of the helical projection is equal to the maximum arc length of rotation of the jaws.

In an alternative embodiment of the invention, the number of turns of the helical projection is less than or equal to one.

In an optional embodiment of the present invention, the rotating shaft is further provided with an involute rotation protrusion spaced apart from the spiral protrusion, the involute rotation protrusion includes a start end and a stop end, the start end and a side wall of the rotating shaft are in smooth transition, the stop end protrudes out of the side wall of the rotating shaft, and the stop portion and the side wall of the rotating shaft form a second limiting portion.

In an optional embodiment of the present invention, the gear screw further includes a limiting spring, the limiting spring includes a spring end and a limiting end, the limiting end is engaged with the involute rotation protrusion to limit the reverse rotation of the gear screw, and the spring end is embedded in the housing of the unlocking mechanism.

In an optional embodiment of the present invention, the gear screw further includes a driving wheel, and the driving wheel is fixedly connected to an end of the rotating shaft and drives the rotating shaft to rotate.

In an optional embodiment of the present invention, the driving wheel is fixedly connected to the rotating shaft through the involute rotation projection, and the involute rotation projection is located at a root of the driving wheel.

In an alternative embodiment of the present invention, the engaging portion has engaging teeth, and the spiral protrusion has spiral teeth, the engaging teeth engaging with the spiral teeth;

the first limiting part comprises a limiting surface, the spiral protrusion is provided with a limiting end, and the limiting end can be attached to the limiting surface in a limiting mode.

In an optional embodiment of the invention, the first limiting part further comprises a yielding tooth, and the yielding tooth and the limiting surface form a yielding space, so that the jaw can rotate and reset towards the second direction relative to the gear screw.

The invention also provides an automobile door lock, which comprises an unlocking mechanism.

The embodiment of the invention has the beneficial effects that: through the spiral boss and the rotatory boss of gradually opening of design on gear screw, make the part quantity of whole mechanism significantly reduce, there are the advantage of convenient assembly and reduce cost, through designing first spacing portion on the jack catch, can effectually offset residual inertia force, the one-way spacing design of spacing spring, can effectually prevent again to offset the too big bounce-back off tracking problem that causes of power, make the very succinct reliable of whole mechanism optimization, realize that one set of simple mechanism accomplishes one set of complicated action.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic structural view of an unlocking mechanism provided in embodiment 1 of the present invention;

FIG. 2 is an exploded view of the unlocking mechanism;

FIG. 3 is a schematic view of the assembly of the gear screw and pawl of FIG. 1;

FIG. 4 is a schematic view of a gear screw;

FIG. 5 is a schematic view of the geared screw in an initial position;

FIG. 6 is a schematic view of the geared screw at the maximum open position;

FIG. 7 is a schematic view of the structure of the jaw;

fig. 8 is a schematic view of an automotive door lock provided in embodiment 2 of the present invention in a locked position;

fig. 9 is a schematic view of an automotive door lock in an unlocked position.

Icon: 100-an unlocking mechanism; 10-a housing; 11-a first direction; 12-a second direction; 13-a geared screw; 131-a transmission wheel; 132-a rotating shaft; 134-spiral protrusions; 135-involute swivel tabs; 136-a limit spring; 16-claws; 162-an engagement portion; 18-a first stop; 182-a limiting surface; 185-yield teeth; 20-locking; 21-cardboard; 22-bottom plate.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "first", "second", "third", and the like are used only for distinguishing the description, and are not intended to indicate or imply relative importance.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed" and "connected" are to be interpreted broadly, e.g., as being either fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The embodiments of the invention will be described in detail below with reference to the drawings, but the invention can be implemented in many different ways as defined and covered by the claims.

Example 1

Fig. 1 is a schematic structural diagram of an unlocking mechanism 100 provided in this embodiment, and fig. 2 is an exploded schematic diagram of the unlocking mechanism 100, please refer to fig. 1 and fig. 2.

The unlocking mechanism 100 includes a gear screw 13 and a pawl 16 which are engaged with each other, the gear screw 13 includes a rotating shaft 132 provided with a spiral protrusion 134, and the pawl 16 includes an engaging portion 162 and a first stopper portion 18 for restricting rotation of the gear screw 13.

The unlocking mechanism 100 has a first state that the engaging portion 162 is engaged with the spiral protrusion 134, and the gear screw 13 drives the jaw 16 to rotate towards the first direction 11, and a second state that the first limiting portion 18 is matched with the spiral protrusion 134 for limiting, and the jaw 16 rotates towards the second direction 12 opposite to the first direction 11 under the action of external force to reset.

At present, what car lock of getting on the bus adopted mostly is electric door lock, it utilizes the inside small motor of lock body, through the gear, the worm, the transmission action of output force is realized to mechanisms such as turbine and screw rod, small motor passes through the gear transmission promptly, with torsion transmission at a screw rod that has the return torsional spring, there is a gliding screw thread slider on the screw rod, after small motor circular telegram 500ms, can drive the screw thread slider and be radial motion on the screw rod, after the circular telegram, the screw rod receives the restoring force effect of return torsional spring, can drive the screw thread slider and reset, thereby realize the motion of push-and-pull.

However, the output torque of the small motor is small and the rotation speed is high, when the small motor is powered on for a short time, the inertia generated by the high rotation speed is used as the output torque, and in order to ensure the full force output of the inertia force and reduce the system response time, a reset torsion spring is added in the transmission mechanism, the action of the reset torsion spring is that after the power on is finished, the whole mechanism is reset to the initial starting position after the action execution is finished, because of the addition of the torsion spring, the inertia force generated by the high-speed rotation of a part of the motor after the power on is inevitably counteracted, so that the total output force of the mechanism is smaller, and when the high-speed rotation motion of the motor is converted into the reciprocating swing of the swing arm on the lock body, a plurality of stages of compact parts are needed in the middle to realize.

Often during the manufacturing process of these gears, worm wheel and screw, the higher dimensional accuracy requirements result in higher costs, a higher number of parts to make up, more complex assembly and control processes, and also in implicit quality risks and costs.

The unlocking mechanism 100 provided in this embodiment is based on an optimized design of the movement mechanism, and reduces the number of parts and the product cost on the premise of obtaining the same function. And the lock body can be simplified by the use of the unlocking mechanism 100, thereby obtaining a reliable and easily controlled product.

The unlocking mechanism 100 according to embodiment 1 can reduce the number of parts required in the transmission mechanism and the complexity of processing of these parts, thereby achieving a reliable function.

The specific structure and the correspondence relationship between the respective components of the unlocking mechanism 100 will be described in detail below.

Fig. 3 is an assembly diagram of the gear screw 13 and the jaw 16, fig. 4 is a structural diagram of the gear screw 13, fig. 5 is a diagram of the gear screw 13 at an initial position, and fig. 6 is a diagram of the gear screw 13 at a maximum opening position, as shown in fig. 3, 4, 5 and 6.

The gear screw 13 includes a driving wheel 131, a rotating shaft 132 and a limiting spring 136, wherein the driving wheel 131 is fixedly connected with the end of the rotating shaft 132, the driving wheel 131 drives the rotating shaft 132 to rotate, the rotating shaft 132 is provided with spiral protrusions 134 and involute rotary protrusions 135 at intervals along the axial direction, wherein the spiral protrusions 134 can be matched with the jaws 16, and in the rotating process of the rotating shaft 132, the jaws 16 can be driven to rotate by a certain angle, the involute rotary protrusions 135 are used for being matched with the limiting spring 136, one end of the limiting spring 136 is clamped in the shell 10 of the unlocking mechanism 100, and the other end of the limiting spring is matched with the outer wall of the involute rotary protrusions 135, so that the rotating shaft 132 can only rotate in the forward direction, and the reverse rotation of the rotating shaft.

Specifically, the number of turns of the spiral protrusion 134 is less than or equal to one, and the spiral protrusion 134 is disposed along the axis of the rotating shaft 132, so that when the rotating shaft 132 rotates, the spiral protrusion 134 can drive the claw 16 to rotate by a certain angle.

Optionally, the involute rotation protrusions 135 and the spiral protrusions 134 are disposed at intervals, the involute rotation protrusions 135 are located on the same section of the side wall of the rotating shaft 132, the involute rotation protrusions 135 include an initial end and a terminating end, wherein the initial end and the side wall of the rotating shaft 132 are in smooth transition, the terminating end protrudes out of the side wall of the rotating shaft 132, so that the radius of the rotating shaft 132 is gradually increased, the terminating end and the side wall of the rotating shaft 132 form a second limiting portion, and the second limiting portion is used for being matched with the limiting spring 136, so as to limit the reverse rotation of the rotating shaft 132.

Optionally, the limiting spring 136 includes a spring end and a limiting end, the limiting end is engaged with the involute rotary protrusion 135 for limiting the reverse rotation of the gear screw 13, the spring end is embedded in the housing 10 of the unlocking mechanism 100, when the rotating shaft 132 rotates along the first direction 11, the side wall of the rotating shaft 132 presses against the limiting spring 136, the limiting spring 136 is stressed to press the housing 10, so that the spring end is compressed, the length of the limiting spring 136 decreases, the limiting end is always engaged with the side wall of the rotating shaft 132, the radius of the involute rotary protrusion 135 increases gradually with the rotation of the rotating shaft 132, the limiting spring 136 is gradually compressed, when the limiting end of the involute rotary protrusion 135 rotates to engage with the limiting end of the limiting spring 136, the length of the limiting spring 136 decreases to the minimum size, the limiting spring 136 engages with the second limiting portion with the rotation of the rotating shaft 132, at this time, the radius of the rotating shaft 132 decreases abruptly, the pressing force of the stopper spring 136 is also reduced, and the length of the stopper spring 136 is extended to the original size. When the rotating shaft 132 rotates along the second direction 12, the limiting spring 136 interferes with the second limiting portion to limit, so that the rotating shaft 132 cannot rotate along the second direction 12.

Optionally, in this embodiment, the driving wheel 131 is fixedly connected to the rotating shaft 132 through an involute rotating protrusion 135, and the involute rotating protrusion 135 is located at a root position of the driving wheel 131.

In this embodiment, the number of effective turns of the helical projection 134 is 0.92 turns, and the pitch of the helical projection 134 is equal to the maximum arc length of rotation of the pawl 16. The screw boss 134 features cooperate with the engaging portion 162 on the pawl 16, so that when the screw boss 134 rotates for one revolution, the pawl 16 can be driven to swing by a maximum unlocking stroke through the stroke matching design, and thus, motor-driven unlocking is realized.

Fig. 7 is a schematic structural view of the claw 16, please refer to fig. 7.

The claw 16 is a small fan-shaped structure, and is provided with an engaging portion 162 and a first limiting portion 18 at a position away from the center of a circle, the engaging portion 162 and the first limiting portion 18 are arranged at an interval, and the interval is the maximum rotation arc length of the claw 16.

The engaging portion 162 has engaging teeth, the spiral protrusion 134 on the rotating shaft 132 has spiral teeth, the spiral teeth are engaged with the engaging teeth, the rotating shaft 132 rotates, and the spiral protrusion 134 drives the claw 16 to rotate through a certain angle.

Alternatively, the number of teeth is one and the pitch of the helical projection 134 is equal to the maximum arc length of rotation of the pawl 16.

Optionally, the first position-limiting portion 18 includes a position-limiting surface 182 and a relief tooth 185, and the relief tooth 185 and the position-limiting surface 182 form a relief space, which enables the pawl 16 to be rotationally reset relative to the gear screw 13 in the second direction 12.

The limiting surface 182 is used for being matched with the spiral protrusion 134, the spiral protrusion 134 is provided with a limiting end, and the limiting end can be attached to and interfered with the limiting surface 182, so that the rotation of the rotating shaft 132 is limited.

When the claw 16 swings to the maximum position, the spiral protrusion 134 on the rotating shaft 132 interferes with the first limiting portion 18 of the claw 16 to generate a limiting effect, so that the rotating shaft 132 is blocked and stops rotating, and the residual inertia force caused by the motor driving the rotating shaft 132 is offset. Since the effective number of turns of the spiral protrusion 134 is 0.92, a part of the clearance is reserved so that the claw 16 can move to the initial position through the clearance under the action of the reset torsion spring of the claw 16. When the gear screw 13 reaches the initial state position after rotating for one circle, the gear screw 13 can always rotate (rotate forward) in one direction, and the rotation period is set to 1 circle, so that all mechanisms can be reset to the initial state.

In summary, the movement process of the unlocking mechanism 100 is simplified as follows: and (3) electric unlocking is carried out, the unlocking force disappears, the residual inertia force is counteracted by the designed first limiting part 18, and all the mechanisms automatically reset or stop at the initial positions to prepare for next locking and unlocking.

Because the manufacturing tolerance and the precision error cannot be completely eliminated, the rotating speed of each motor cannot be guaranteed to be a constant value under the condition that the motor is electrified for 500ms, and meanwhile, the residual inertia force is not an accurate fixed value, so when the residual inertia force is counteracted, rebounding may occur, and the whole mechanism is unstable in operation and unreliable.

The limiting spring 136 therefore serves to ensure that the gear screw 13 does not bounce when the residual inertial force is removed. In addition to the features of the spiral protrusion 134, the rotation shaft 132 is further provided with an involute rotation protrusion 135, and since one end of the limiting spring 136 always presses against the housing 10 of the unlocking mechanism 100 and the other end of the limiting spring cooperates with the involute rotation protrusion 135, a one-way mechanism is formed. That is, when the screw gear rotates in the forward direction, the involute rotation projection 135 gradually compresses the limit spring 136, but when the screw gear rotates in the reverse direction, the involute rotation projection 135 is stopped by the limit spring 136 and cannot rotate in the reverse direction.

After the gear screw 13 rotates for a circle, the limiting spring 136 completes one compression under the action of the involute rotating protrusion 135, and then bounces up the action process of resetting, so that the gear screw 13 is prevented from rebounding to generate displacement or deviation when the residual inertia force is eliminated.

The operation principle of the unlocking mechanism 100 provided by embodiment 1 of the present invention is that when the electric unlocking is required, the motor is powered on for 500ms, the motor rotates at a high speed, first level of speed reduction is performed, the gear screw 13 is driven to rotate, the gear screw 13 rotates for one circle, the claw 16 is driven to swing once, and then the initial state is recovered.

In this embodiment, the latch 16 is fixed on the bottom plate 22 of the unlocking mechanism 100 through a rivet shaft, and a return spring (torsion spring) is installed on the latch 16 in the axial direction of the rivet shaft, the spiral protrusion 134 on the rotating shaft 132 rotates in the forward direction, the latch 16 rotates toward the first direction 11 by the maximum rotation arc length, when the rotating shaft 132 rotates by one turn, the first limiting portion 18 of the latch 16 is matched with the spiral protrusion 134, and the latch 16 is reset under the action of the return spring.

The unlocking mechanism 100 provided by the embodiment 1 of the invention has the following beneficial effects:

design benefit, it is reasonable, through the spiral boss and the rotatory boss of gradually opening of design on gear screw 13, make the part quantity of whole mechanism significantly reduce, there are the advantage of convenient assembly and reduce cost, and simultaneously, through the design to 16 mechanisms of jack catch, can effectually offset residual inertia force, spacing spring 136's one-way spacing design, again can effectually prevent to offset the bounce-back off tracking problem that too big caused of power, make the ten minutes succinct reliable of whole mechanism optimization, simultaneously also effectually avoid flexonics' inaccuracy and instability. A set of complex actions can be completed by a set of simple mechanisms.

Example 2

Embodiment 2 of the present invention provides an automobile door lock including the unlocking mechanism 100 as provided in embodiment 1.

Fig. 8 is a schematic view of an automobile door lock in a locked position, and fig. 9 is a schematic view of an automobile door lock in an unlocked position, which are described in detail below with reference to fig. 8 and 9:

the automobile door lock further comprises a lock catch 20 and a clamping plate 21, wherein the lock catch 20 is rotatably arranged on the shell 10 of the unlocking mechanism 100 through a riveting shaft, the lock catch 20 is fixed on an automobile body, the automobile door lock comprises a motor device part and a mechanical lock machine part, wherein the motor device part is integrated with a motor and an optimized gear screw 13, the motor is used as a power source, and the gear screw 13 is used as a transmission medium; the mechanical lock mechanism part mainly keeps the lock body mechanically locked reliably and can be opened effectively.

Specifically, cardboard 21 and jack catch 16 are fixed on bottom plate 22 by the riveting axle, and cardboard 21 and jack catch 16 have the reset torsion spring at the axial of fixed axle installation, and cardboard 21 and the rotatable setting in bottom plate 22 of jack catch 16, under the circumstances that receives external force drive, jack catch 16 can rotate certain angle, can compress the reset torsion spring this moment, and after cardboard 21 and jack catch 16's external force cancel, can receive the torsion effect of reset torsion spring, get back to initial position.

When the catch plate 21 is engaged with the claws 16, the U-shaped groove inside the catch plate 21 engages with the cylinder on the striker 20, and the locked state of the door is maintained by the engaged state.

It should be noted that the features of the embodiments of the present invention may be combined with each other without conflict.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An unlocking mechanism is characterized by comprising a gear screw and a clamping jaw which are meshed with each other, wherein the gear screw comprises a rotating shaft provided with a spiral protrusion, and the clamping jaw comprises a meshing part and a first limiting part for limiting the rotation of the gear screw;

the unlocking mechanism is provided with a first state that the meshing part is meshed with the spiral protrusion, the gear screw drives the clamping jaw to rotate towards a first direction, the first limiting part is matched with the spiral protrusion for limiting, and the clamping jaw rotates towards a second direction opposite to the first direction under the action of external force to reset;

the rotating shaft is also provided with involute rotating bulges which are arranged at intervals with the spiral bulges, the involute rotating bulges comprise starting ends and terminating ends, the starting ends and the side walls of the rotating shaft are in smooth transition, the terminating ends protrude out of the side walls of the rotating shaft, and the terminating parts and the side walls of the rotating shaft form second limiting parts;

the gear screw further comprises a limiting spring, the limiting spring comprises a spring end and a limiting end which are opposite, the limiting end is matched with the involute rotating bulge and used for limiting the reverse rotation of the gear screw, and the spring end is embedded in the shell of the unlocking mechanism.

2. The unlocking mechanism of claim 1, wherein a pitch of said helical projection is equal to a maximum arc length of rotation of said pawl.

3. The unlocking mechanism of claim 2, wherein the number of turns of said helical projection is less than or equal to one.

4. The unlocking mechanism of claim 1, wherein the gear screw further comprises a transmission wheel, and the transmission wheel is fixedly connected with the end of the rotating shaft and drives the rotating shaft to rotate.

5. The unlocking mechanism according to claim 4, wherein the driving wheel is fixedly connected with the rotating shaft through the involute rotary projection, and the involute rotary projection is positioned at the root of the driving wheel.

6. The unlocking mechanism according to claim 1, wherein said engaging portion has engaging teeth, said spiral projection has spiral teeth, and said engaging teeth are engaged with said spiral teeth;

7. The unlocking mechanism according to claim 6, wherein the first limiting portion further includes a yielding tooth, and the yielding tooth and the limiting surface form a yielding space, so that the pawl can be rotationally reset toward the second direction relative to the gear screw.

8. An automobile door lock characterized by comprising the unlocking mechanism according to any one of claims 1 to 7.