CN202064715U

CN202064715U - Locking device used for vehicle door lock

Info

Publication number: CN202064715U
Application number: CN2011200227924U
Authority: CN
Inventors: 谢小鹏; 王瑞洲; 罗通强; 王伟强
Original assignee: South China University of Technology SCUT
Current assignee: South China University of Technology SCUT
Priority date: 2011-01-21
Filing date: 2011-01-21
Publication date: 2011-12-07
Anticipated expiration: 2021-01-21

Abstract

The utility model discloses a locking device used for a vehicle door lock. The locking device comprises a shell body, a motor and a lock tongue; the lock tongue is connected with a rotating shaft of the motor by a retractor, the retractor is a Ti Ni shape memory alloy strip, and a connecting rod of the lock tongue is connected with the shape memory alloy strip by penetrating the shell body and by a hinge pin; and a spring 1 and a spring 2 are sleeved on the connecting rod, wherein the spring 1 is sleeved between the lock tongue and the outer wall of the shell body, and the spring 2 is sleeved between the hinge pin and the inner wall of the shell body. In the locking device, the Ti Ni shape memory alloy strip is adopted for replacing a worm gear and a worm drive, so that the gear surface contact fatigue and the noise caused by the matched driving of the worm gear and the worm drive are avoided; the springs are used for absorbing the power generated by the moving of the lock tongue into a lock body and providing the power for the lock to move out of the lock body, so as to improve the utilization rate of the power; and as the two springs are arranged inside the lock body and outside the lock body, the loud noise caused by a collision between the worm and the lock body is avoided, the collision noise can be eliminated greatly, and noise-free driving can be realized. The locking device is simple in structure, low in cost, and is easy to machine and manufacture.

Description

A kind of automobile-used door lock dead lock

Technical field

The utility model relates to automobile door lock, particularly a kind of automobile-used door lock dead lock.

Background technology

At present the automobile door lock dead lock mainly is divided into two kinds of direct-push and swing arms, and direct-push automobile centrally controrlled locking system dead lock generally drives worm gear by motor and rotates, worm gear and worm engaging, thus the rotation that becomes worm gear is the axial translation of worm screw.

The friction of automobile door lock dead lock is mainly worm gear and worm screw, worm screw and lock body two places; Through visit investigation to some automobile centrally controrlled locking system dead locks enterprise, and build automobile door lock dead lock emulation experiment platform in the laboratory, carry out emulation and ageing test and find that there is following drawback in this kind direct-push automobile centrally controrlled locking system dead lock: 1, the quality of fit to worm gear and worm screw requires very high, therefore production technology is comparatively complicated, occurs easily causing that because of quality of fit is not high flank of tooth contact fatigue, spot corrosion, flank of tooth plastic strain, excessive wear even the gear teeth or tooth root fracture etc.; 2, can not effectively control the movement travel of dead bolt, promptly no matter be dead bolt by lock body inside to lock body external movement or dead bolt by the lock body outside to the lock body internal motion, all to brake, both cause serious wearing and tearing, produce very big noise again against the collision of worm screw and lock body; 3, comprise worm gear and worm screw, worm screw and two kinematic pairs of lock body, complex structure at least; 4, by realize cooperating of worm gear and worm screw Rotation With Changing to and realize becoming rotation by worm screw and cooperating of lock body and be translation, whole transmission efficiency is low, causes the dissipation of electric energy.

Summary of the invention

The purpose of this utility model is to overcome the shortcoming and defect of above-mentioned prior art, provide a kind of simple in structure, retardation efficiency is high, noise is little, anti abrasive automobile-used door lock dead lock.

The utility model is achieved through the following technical solutions:

A kind of automobile-used door lock dead lock, comprise housing, motor, dead bolt, described dead bolt is connected with the reel of motor shaft by tractor, described tractor is the memorial alloy bar, the connecting rod of described dead bolt passes housing and is connected with the marmem bar by bearing pin, be arranged with spring one and spring two on the described connecting rod, its medi-spring one is set between dead bolt and the housing outer wall, spring two is set between bearing pin and the inner walls.

Described memorial alloy bar is a TiNi marmem bar.

The length of described spring one is greater than the length of spring two.

The stiffness factor of described spring one is less than spring two.

Compared with prior art the beneficial effects of the utility model are:

1, places spring one between dead bolt and the housing, in the motion process of enclosure interior, can avoid dead bolt and housing collision at dead bolt by hull outside, promptly can avoid the impact between dead bolt and the housing, also can reduce simultaneously the fret wear of dead bolt and memorial alloy bar, greatly weaken even can eliminate impact sound, realize noiseless transmission; 2, place spring two between pin and the housing, in the back a small half of movement travel of hull outside, avoid producing impact at dead bolt by enclosure interior, can avoid putting on the dynamic loading of alloy bar and motor shaft junction, reduce the wearing and tearing between memorial alloy bar and the motor shaft, greatly weaken even can eliminate impact sound, realize noiseless transmission; 3, this patent has only the lubricated kinematic pair of needs of dead bolt and housing cooperation place, adds the application life that suitable lubricating grease can effectively prolong door lock afterwards; 4, transmission is simple, does not need the worm screw or the high accuracy of worm gear to cooperate, and reduces technological requirement, and the production flow process is simple; 5, the TiNi marmem can bend more than 100,000 times deflection repeatedly and can ignore, and need not change all the life in can realizing under the condition of good lubrication.

The utility model adopts TiNi marmem bar to substitute worm gear and worm-drive, has avoided cooperating between former worm gear and the worm screw transmission to occur flank of tooth contact fatigue easily, and can greatly eliminate impact sound and realize noiseless transmission.The utility model is simple in structure, reduced technological requirement, with low cost, be easy to processing and manufacturing.

Description of drawings

Fig. 1 is the structural representation of the automobile-used door lock dead lock of the utility model.

The specific embodiment

Below in conjunction with specific embodiment the utility model is done further concrete detailed description the in detail, but embodiment of the present utility model is not limited thereto, the technological parameter for not indicating especially can carry out with reference to routine techniques.

Embodiment

As shown in Figure 1, the automobile-used door lock dead lock of the utility model, comprise housing 7, motor 8, dead bolt 6, described dead bolt 6 is connected by the reel 2 of tractor with motor 8 rotating shafts, described tractor adopts TiNi marmem bar 1, the connecting rod of described dead bolt 6 passes housing 7 and is connected with TiNi marmem bar 1 by bearing pin 5, be arranged with spring 1 and spring 24 on the described connecting rod, its medi-spring 1 is set between the outer wall of dead bolt 6 and housing 7, spring 24 is set between bearing pin 5 and housing 7 inwalls.

The length of described spring 1 is greater than the length of spring 24; The stiffness factor of described spring 1 is less than spring 24.Spring 1 places between (housing 7 outsides) dead bolt 6 and the housing 7, realize resetting promptly promote dead bolt 6 by housing 7 inside to housing 7 external movement.Spring 24 place (housing 7 inside) pin 5 and and housing 7 between, when dead bolt 6 is made buffer during to housing 7 external movement by housing 7 inside.

When the driver presses signal of controller that the automobile door lock switch is given dead lock, current impulse of controller output, CD-ROM drive motor 8 rotates, the reel of fixing in motor 8 rotating shafts 2, TiNi marmem bar 1 on the reel 2, the rotation of motor 8 is curled TiNi marmem bar 1 on reel 2, thereby the pulling dead bolt 6 by housing 7 outsides to housing 7 internal motions, simultaneously, because spring 1 is between housing 7 and dead bolt 6, therefore along with dead bolt 6 by of the motion of housing 7 outsides to housing 7 inside, spring 1 constantly is compressed.When the pulse of dead lock controller (not shown) output current makes the moment of motor 8 generations equal the moment of spring force generation, the alloy bar stress balance, thereupon, dead bolt 6 speed are decreased to zero rapidly.After the current impulse of dead lock controller finishes, motor 8 rotating shafts no longer are subjected to extraneous rotating torque, under the moment loading that the elastic force of spring 1 produces, dead bolt 6 by housing 7 inside to housing 7 external movement, thereupon, spring 24 is compressed, and avoids being connected between TiNi marmem bar 1 and motor 8 rotating shafts to be subjected to bigger impact.Because spring 24 stiffness factors are very big, so the decrement of spring 24 is very little, though dead bolt 6 vibrates, the additional wear that this vibration brings almost can be ignored.After dead bolt 6 was static, spring 1, spring 24 and TiNi marmem bar 1 returned to initial free state or tensioning state.Can change the time of dead bolt 6 withdrawals by the width of regulating dead lock controller output pulse.The impulse stroke that parameters such as the length by regulating spring 1, spring 24, stiffness factor, material can be regulated dead bolt 6.Concrete each part Coefficient is selected can be determined by each automobile centrally controrlled locking system dead lock correlation engineering personnel of enterprise with the integral position assembly relation.

Just can realize the utility model preferably as mentioned above.

The foregoing description is the utility model preferred implementation; but embodiment of the present utility model is not restricted to the described embodiments; other any do not deviate from change, the modification done under spiritual essence of the present utility model and the principle, substitutes, combination, simplify; all should be the substitute mode of equivalence, be included within the protection domain of the present utility model.

Claims

1. automobile-used door lock dead lock, comprise housing, motor, dead bolt, described dead bolt is connected with the reel of motor shaft by tractor, it is characterized in that: tractor is the memorial alloy bar, the connecting rod of described dead bolt passes housing and is connected with the marmem bar by bearing pin, be arranged with spring one and spring two on the described connecting rod, its medi-spring one is set between dead bolt and the housing outer wall, spring two is set between bearing pin and the inner walls.

2. automobile-used door lock dead lock according to claim 1 is characterized in that: described memorial alloy bar is a TiNi marmem bar.

3. automobile-used door lock dead lock according to claim 2, it is characterized in that: the length of described spring one is greater than the length of spring two.

4. automobile-used door lock dead lock according to claim 3, it is characterized in that: the stiffness factor of described spring one is less than spring two.