阅读说明：本技术 一种用于智能锁具的过载保护齿轮 (Overload protection gear for intelligent lockset ) 是由 沈汉标 王妙玉 童威云 黄安川 黄克洲 夏亮 于 2019-09-23 设计创作，主要内容包括：本发明公开了一种用于智能锁具的过载保护齿轮,包括：输入齿轮、输出齿轮、齿轮轴、圆球体以及弹性件；输入齿轮和智能锁具的减速机箱传动连接,输出齿轮和智能锁具的锁舌传动连接；输入齿轮和输出齿轮均枢接于齿轮轴上,输出齿轮和输入齿轮均轴向固定,输出齿轮抵接在输入齿轮的顶部；输入齿轮内开设有用于容纳弹性件的弹簧槽,弹性件设置在弹簧槽内；圆球体设置在弹性件的顶部,输出齿轮的底部开设有球面凹坑,圆球体的上部容纳于球面凹坑内,圆球体的下部容纳于弹簧槽内,并对弹性件进行压缩。本发明实现了对智能锁具内部的过载保护,不容易因负载过大而损害到锁具的齿轮和减速机箱,增强了锁具的稳定可靠性,免于频繁的维修和更换。(The invention discloses an overload protection gear for an intelligent lock, which comprises: the input gear, the output gear, the gear shaft, the spherical body and the elastic piece; the input gear is in transmission connection with a speed reducer case of the intelligent lock, and the output gear is in transmission connection with a lock tongue of the intelligent lock; the input gear and the output gear are pivoted on the gear shaft, the output gear and the input gear are axially fixed, and the output gear is abutted against the top of the input gear; the input gear is internally provided with a spring groove for accommodating an elastic piece, and the elastic piece is arranged in the spring groove; the spheroid sets up at the top of elastic component, and the sphere pit has been seted up to the bottom of output gear, and the upper portion of spheroid holds in the sphere pit, and the lower part of spheroid holds in the spring inslot to compress the elastic component. The invention realizes the overload protection of the interior of the intelligent lock, is not easy to damage the gear and the speed reducer case of the lock due to overlarge load, enhances the stability and the reliability of the lock, and avoids frequent maintenance and replacement.)

1. An overload protection gear for an intelligent lockset, comprising: the input gear, the output gear, the gear shaft, the spherical body and the elastic piece; the input gear is in transmission connection with a speed reducer case of the intelligent lock, and the output gear is in transmission connection with a lock tongue of the intelligent lock; the input gear and the output gear are both pivoted on the gear shaft, the output gear and the input gear are both axially fixed, and the output gear is abutted against the top of the input gear; a spring groove for accommodating an elastic piece is formed in the input gear, and the elastic piece is arranged in the spring groove; the sphere is arranged at the top of the elastic piece, a spherical pit is formed in the bottom of the output gear, the upper part of the sphere is accommodated in the spherical pit, and the lower part of the sphere is accommodated in the spring groove and compresses the elastic piece; the volume of the upper part of the sphere is less than or equal to the volume of the lower part of the sphere.

2. The overload protection gear for an intelligent lock according to claim 1, wherein the elastic member is a coil spring.

3. The overload protection gear for the intelligent lock according to claim 1, wherein the spherical body is a steel ball.

4. The overload protection gear for an intelligent lock according to claim 1, wherein the input gear includes an input part and a first engaging part which are integrally formed, a gear is arranged on the circumference of the input part, and the first engaging part is positioned on the top of the input part; the output gear comprises an output part and a second joint part which are integrally formed, a gear is arranged on the circumference of the output part, and the second joint part is positioned at the bottom of the output part; the first and second engagement portions are in close abutment.

5. The overload protection gear for the intelligent lock according to claim 4, wherein the number of the spherical pits is 2, and the spherical pits are symmetrically arranged in the first engaging part; the number of the spring grooves is 2, and the spring grooves are symmetrically arranged in the second joint part.

6. The overload protection gear for an intelligent lock according to claim 4, wherein the first engagement portion and the second engagement portion are cylindrical and have equal diameters.

Technical Field

The invention relates to the field of locks, in particular to an overload protection gear for an intelligent lock.

Background

The existing intelligent lock usually adopts a micro motor as a drive, and the lock tongue can realize the actions of locking and unlocking through a series of transmission in the lock; wherein, drive gear is indispensable driving medium in intelligent tool to lock, is used for carrying out the transmission to the torque of speed reducer case usually.

In the daily use of smart locks, sometimes lock loads greater than expected occur: for example, a lock groove on a door frame, which is matched with a lock tongue, has a machining error, the groove position is made shallow, so that the lock tongue is jacked without being in place, and a motor is driven continuously, so that the load in the lock is increased suddenly, and a transmission gear or a speed reducer case is damaged; or the sealing treatment of the lockset is insufficient, foreign matters enter the lockset, and the gear is blocked or deadly due to insufficient lubricating performance, so that the load is suddenly increased; even some children with strong curiosity and heavy fun artificially prevent the action of the lock bolt in the working process of the lock, forcibly pull or push the lock bolt tightly, and the motor is continuously driven at the same time, so that the damage of the gear or the speed reducing case can be caused.

So, the stability of tool to lock is than relatively poor, does not have a better overload protection means, can not stand various emergency among the daily life, leads to the tool to lock to damage easily, and the frequency of maintenance and change is higher, brings very not good user experience for the consumer.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention aims to provide an overload protection gear for an intelligent lock, which can be separated from transmission under the condition of overlarge lock load to protect the gear.

The invention is realized by the following technical scheme:

an overload protection gear for an intelligent lockset comprising: the input gear, the output gear, the gear shaft, the spherical body and the elastic piece; the input gear is in transmission connection with a speed reducer case of the intelligent lock, and the output gear is in transmission connection with a lock tongue of the intelligent lock; the input gear and the output gear are both pivoted on the gear shaft, the output gear and the input gear are both axially fixed, and the output gear is abutted against the top of the input gear; a spring groove for accommodating an elastic piece is formed in the input gear, and the elastic piece is arranged in the spring groove; the sphere is arranged at the top of the elastic piece, a spherical pit is formed in the bottom of the output gear, the upper part of the sphere is accommodated in the spherical pit, and the lower part of the sphere is accommodated in the spring groove and compresses the elastic piece; the volume of the upper part of the sphere is less than or equal to the volume of the lower part of the sphere.

Further, the elastic member is a coil spring.

Furthermore, the sphere is a steel ball.

Further, the input gear comprises an input part and a first joint part which are integrally formed, a gear is arranged on the circumference of the input part, and the first joint part is positioned at the top of the input part; the output gear comprises an output part and a second joint part which are integrally formed, a gear is arranged on the circumference of the output part, and the second joint part is positioned at the bottom of the output part; the first and second engagement portions are in close abutment.

Further, the number of the spherical pits is 2, and the spherical pits are symmetrically arranged in the first joint part; the number of the spring grooves is 2, and the spring grooves are symmetrically arranged in the second joint part.

Further, the first joint part and the second joint part are both cylindrical and have the same diameter.

Compared with the prior art, the invention has the beneficial effects that: under the condition of normal load, the compressed elastic piece tightly pushes the spherical body in the spherical pit, so that the input gear, the spherical body and the output gear rotate around the gear shaft together; when the load is too big, the moment that the spheroid transmitted is not enough to overcome the load resistance, and the upper portion of spheroid breaks away from in the sphere pit, is impressed in the spring groove by the bottom plane of output gear afterwards, and input gear can no longer drive output gear and rotate, makes intelligent tool to lock's motor no longer drive the spring bolt. Therefore, the invention realizes the overload protection of the interior of the intelligent lock, is not easy to damage the gear and the speed reducer case of the lock due to overlarge load, can deal with various emergency situations of the lock in daily use, enhances the stability and the reliability of the lock, prolongs the service life of the lock, and avoids frequent maintenance and replacement.

Drawings

FIG. 1 is an overall schematic view of the present invention;

FIG. 2 is a cross-sectional view of the present invention in a normal loaded condition;

FIG. 3 is a cross-sectional view of the present invention in an overload condition;

fig. 4 is an exploded view of the present invention.

In the figure: 10. an input gear; 11. a spring slot; 12. an input section; 13. a first engaging portion; 20. an output gear; 21. a spherical pit; 22. an output section; 23. a second engaging portion; 30. a gear shaft; 40. steel balls; 50. a coil spring.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and the detailed description, and it should be noted that any combination of the embodiments or technical features described below can be used to form a new embodiment without conflict.

Referring to fig. 1 to 4, the present invention discloses an overload protection gear for transmission inside an intelligent lock, including: input gear 10, output gear 20, gear shaft 30, sphere and elastomer. The output gear 20 is in transmission connection with a speed reducer case of the intelligent lock, and the output gear 20 is in transmission connection with a lock tongue of the intelligent lock so as to transmit torque output by the motor and the speed reducer to the lock tongue, so that the lock tongue performs telescopic motion, and the unlocking and locking functions are realized.

Wherein, the input gear 10 and the output gear 20 are both pivoted on the gear shaft 30 to rotate, and the output gear 20 and the input gear 10 are both axially fixed. The output gear 20 abuts on the top of the input gear 10, and a spring groove 11 for accommodating an elastic member is formed in the input gear 10, wherein the elastic member is preferably a spiral spring 50 in the embodiment; the sphere is arranged on the top of the elastic piece, and in the embodiment, the sphere is preferably a steel ball 40; the bottom of the output gear 20 is provided with a spherical pit 21, the upper part of the steel ball 40 is accommodated in the spherical pit 21, the lower part of the steel ball 40 is accommodated in the spring groove 11, and the helical spring 50 is pressed to be compressed; the upper volume of the steel ball 40 is less than or equal to the lower volume of the steel ball 40. In the present embodiment, preferably, the upper volume of the steel ball is equal to the lower volume, that is, the upper half (hemisphere) of the steel ball 40 is accommodated in the spherical recess 21, and the spherical recess 21 is a hemispherical groove; the lower half part is accommodated in the spring groove 11, and the length of the spiral spring 50 is larger than the height of the spring groove 11, so that the steel ball 40 compresses the spiral spring 50, and the spiral spring 50 tightly pushes the steel ball 40 in the output gear 20; the embodiment can better avoid the occurrence of failure and blocking in the using process and simultaneously ensure the normal use of the invention.

The axial fixing of the input gear 10 and the output gear 20 can be realized by a shaft shoulder, a shaft collar, a stop washer, etc., which are known to those skilled in the art and are not in the scope of the improvement of the present invention, and therefore are not described in detail in this embodiment.

The working principle of the invention is as follows: referring to fig. 2, under normal load, the compressed coil spring 50 pushes the steel ball 40 tightly in the spherical pit 21, so that the input gear 10, the steel ball 40 and the output gear 20 rotate around the gear shaft 30 together; referring to fig. 3, when the load is too large, the torque transmitted by the steel ball 40 is not enough to overcome the load resistance, the upper half of the steel ball 40 is separated from the spherical pit 21, and then is pressed into the spring groove 11 by the bottom plane of the output gear 20, and the input gear 10 can not drive the output gear 20 to rotate any more, so that the motor of the intelligent lock can not drive the bolt any more, and the overload protection is realized.

As a preferred embodiment, referring to fig. 4, the input gear 10 includes an input portion 12 and a first engaging portion 13 which are integrally formed, the input portion 12 is provided with a gear on the circumference, and the first engaging portion 13 is located on the top of the input portion 12; the output gear 20 comprises an output part 22 and a second joint part 23 which are integrally formed, a gear is arranged on the circumference of the output part 22, and the second joint part 23 is positioned at the bottom of the output part 22; the first engagement portion 13 and the second engagement portion 23 are in close abutment. The provision of the first engaging portion 13 and the second engaging portion 23 functions to: the provision of the members to define the spherical depressions 21 and the spring grooves 11 allows the input and output portions 12 and 22 to be formed in a complete gear shape without compromising the internal structure thereof.

Further preferably, the number of the spherical recesses 21 is 2, and the spherical recesses are symmetrically arranged in the first engaging portion 13; the number of the spring grooves 11 is 2 and symmetrically arranged in the second engaging portion 23. The two groups of symmetrical spiral springs 50 and steel balls 40 are arranged, so that the transmission is more stable.

Further preferably, referring to fig. 1, the first engaging portion 13 and the second engaging portion 23 are both cylindrical and have the same diameter. The function is as follows: by providing the first joint 13 and the second joint 23 in the form of a cylinder having the same diameter, the two parts are integrated in appearance after abutting, and the structure is simple and does not give a cumbersome appearance.

Through the detailed explanation of the embodiment, it can be understood that the overload protection device realizes the overload protection of the interior of the intelligent lock, is not easy to damage gears and a speed reducer case of the lock due to overlarge load, can cope with various emergency situations of the lock in daily use, enhances the stability and reliability of the lock, prolongs the service life of the lock, avoids frequent maintenance and replacement, and has a very wide application prospect in the field of the intelligent lock.

The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereby, and any insubstantial changes and substitutions made by those skilled in the art based on the present invention are within the protection scope of the present invention.