Overload protection structure of intelligent padlock

Abstract

The utility model discloses an overload protection structure of an intelligent padlock. The overload protection structure comprises a worm gear and a cam arranged on a cam seat, a mounting hole matched with the cam seat is formed in the middle of the worm gear, and at least one pair of oppositely arranged linkage grooves is formed in the side wall of the mounting hole; an overload spring is arranged on the cam seat, abutting parts at the two ends of the overload spring extend outwards to abut against the interiors of the corresponding linkage grooves respectively, the driving motor drives the worm gear to rotate through the worm, the worm gear drives the cam on the cam seat to rotate through the overload spring, and unlocking operation of the intelligent padlock is achieved. When internal parts of the intelligent padlock are stuck and the cam cannot rotate, the worm gear is driven by the driving motor to force the abutting part of the overload spring to deform and retract into the cam seat, so that the worm gear can idle relative to the cam seat, the purpose of protecting the driving motor is achieved, and the service life of the intelligent padlock is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of lockset, more specifically, it relates to an overload protection structure of intelligent padlock. BACKGROUND

[0002] Padlock, the oldest and largest family in the world of lockset, other lockset is from padlock this category to proliferate, derivative; Padlock's lock body is equipped with the ring or "I" shape metal stem that can be buckled, namely "lock beam", so that the padlock is buckled with the lock beam through the lock beam to become a closed lock.

[0003] Such as the announcement number for CN215859578U Chinese utility model patent, discloses a locking transmission structure of intelligent padlock, including the lock catch and unlocking assembly of rotation setting in the lock shell, the lock catch one end part is equipped with the lock hook that cooperates with the lock slot of lock beam, and the other end part is equipped with the locking portion that cooperates with unlocking assembly, the lock catch is equipped with the reset torsion spring that drives the lock catch to rotate towards the lock beam, when the lock beam inserts the lock hole, the lock catch is driven under the reset torsion spring, and the lock hook of lock catch turns into the lock slot of lock beam and locks, at this time, the unlocking assembly will abut on the locking portion of lock catch, when the lock beam moves upward after unlocking assembly unlocking to lock catch, the lock hook slides relative to the lock slot, and makes the lock catch rotate outward, and the lock hook is separated from the lock slot locking, replaces the mode of telescopic lock tongue of the existing padlock, solves the problem that the existing padlock is easy to jam, so that the padlock can be smoothly unlocked.

[0004] The unlocking assembly includes a rocker arm rotatably arranged on the lock shell and a cam for driving the rocker arm to swing, the rocker arm includes a top arm end at the upper end and a swing arm end at the lower end, the top arm end abuts against the locking portion, the swing arm end cooperates with the cam, and the cam is directly driven by the driving motor through a turbine and a worm;

[0005] However, in actual application, the rotation angle of the cam in the intelligent padlock is fixed, and the driving motor controls the number of rotation by time, so that the rotation of the driving motor cannot be completely consistent with the rotation angle of the cam. In order to realize the rotation of the cam to the unlocking position, the rotation angle of the worm driven by the driving motor is greater than the rotation angle of the cam. This will cause the worm and the cam to be too tight, so that the driving motor cannot be reversed after completing the unlocking. Even worse, the driving motor will be overloaded and burned out, which will affect the service life of the intelligent padlock. UTILITY MODEL CONTENTS

[0006] In view of the deficiencies of the prior art, the purpose of the utility model is to provide an overload protection structure of intelligent padlock.

[0007] An overload protection structure of an intelligent padlock, comprising a worm wheel and a cam placed on a cam seat; a mounting hole adapted to the cam seat is arranged in the middle of the worm wheel, and at least one pair of opposite linkage grooves is arranged on the sidewall of the mounting hole;

[0008] An overload spring is arranged on the cam seat, and the abutting portions at both ends of the overload spring extend outward and abut in the corresponding linkage grooves respectively; the worm wheel drives the cam on the cam seat to rotate through the overload spring.

[0009] The utility model further sets up: the cam seat is equipped with the installation groove for installing overload spring, both ends of installation groove are equipped with the opening that links with linkage groove;

[0010] Wherein the both ends of overload spring pass through the corresponding opening and abut in the linkage groove.

[0011] The utility model further sets up: the cam seat is equipped with the clamping groove, and the cam is equipped with the clamping block that links with the clamping groove;

[0012] The cam is fixed on the cam seat through the clamping block and the clamping groove.

[0013] The utility model further sets up: the protection sleeve is arranged in the mounting hole, and the recessed groove adapted to the linkage groove is arranged on the protection sleeve;

[0014] The both abutting portions of the overload spring pass through the opening and abut in the corresponding recessed groove respectively.

[0015] The utility model discloses an overload protection structure of an intelligent padlock, comprising a worm wheel and a cam placed on a cam seat; a mounting hole adapted to the cam seat is arranged in the middle of the worm wheel, and at least one pair of opposite linkage grooves is arranged on the sidewall of the mounting hole; an overload spring is arranged on the cam seat, and the abutting portions at both ends of the overload spring extend outward and abut in the corresponding linkage grooves respectively; wherein the driving motor drives the worm wheel to rotate through the worm, so that the worm wheel drives the cam on the cam seat to rotate through the overload spring, and the unlocking operation of the intelligent padlock is realized.

[0016] When the cam rotates to the unlocking position, the rotation is stopped, the worm wheel is forced to deform the abutting portion of the overload spring to recess inward under the continuous driving of the driving motor, and the abutting portion of the overload spring is reset to protrude outward after the reverse rotation of the driving motor; the driving motor cannot be reversed because the cam and the worm are too tight; when the transmission member in the intelligent padlock is stuck, the worm wheel is forced to deform the abutting portion of the overload spring to recess inward into the cam seat under the driving of the driving motor, so that the worm wheel can rotate relative to the cam seat, thereby protecting the driving motor and prolonging the service life of the intelligent padlock. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 Structure diagram of the overload protection structure of the intelligent padlock;

[0018] Figure 2 Matching diagram of the overload spring and the protective sleeve of the overload protection structure of the intelligent padlock;

[0019] Figure 3 Structure diagram of the worm gear of the overload protection structure of the intelligent padlock;

[0020] Figure 4 Structure diagram of the protective sleeve of the overload protection structure of the intelligent padlock;

[0021] Figure 5 Installation diagram of the cam on the cam seat of the overload protection structure of the intelligent padlock;

[0022] Figure 6 Installation diagram of the overload spring on the cam seat of the overload protection structure of the intelligent padlock;

[0023] Figure 7 Structure diagram of the cam of the overload protection structure of the intelligent padlock;

[0024] Figure 8 Structure diagram of the cam seat of the overload protection structure of the intelligent padlock;

[0025] Figure 9 Structure diagram of the overload spring of the overload protection structure of the intelligent padlock;

[0026] Figure 10 Application diagram of the overload protection structure of the intelligent padlock;

[0027] Mark 1, worm gear; 11, mounting hole; 111, linkage groove; 2, cam seat; 21, mounting groove; 22, opening; 23, clamping groove; 3, cam; 31, clamping block; 4, overload spring; 41, abutting portion; 5, protective sleeve; 51, recessed groove. DETAILED DESCRIPTION

[0028] Referring to the accompanying Figures 1 to 10 The overload protection structure of the intelligent padlock is further described in detail.

[0029] The overload protection structure of the intelligent padlock comprises a worm gear 1 and a cam 3 placed on a cam seat 2; the worm gear 1 is provided with a mounting hole 11 adapted to the cam seat 2 in the middle, and at least one pair of opposite linkage grooves 111 is arranged on the side wall of the mounting hole 11;

[0030] The cam seat 2 is provided with overload spring 4, the abutting portion 41 of both ends of the overload spring 4 extends outward and abuts in the corresponding linkage groove 111 respectively, wherein the driving motor drives the worm gear 1 to rotate, the worm gear 1 drives the cam 3 on the cam seat 2 to rotate through the overload spring 4, and the unlocking operation of the intelligent padlock is realized.

[0031] When the cam 3 rotates to the unlocking position and stops rotating, the worm gear 1 continues to be driven by the driving motor, forcing the abutting portion 41 of the overload spring 4 to deform inwardly, and after the driving motor reverses, the abutting portion 41 of the overload spring 4 repositions outwardly. Effectively avoid the cam 3 and the worm gear 1 cooperate too tightly, so that the driving motor cannot be reversed. When the transmission part in the intelligent padlock is stuck, the worm gear 1 is driven by the driving motor, forcing the abutting portion 41 of the overload spring 4 to deform inwardly into the cam 3 seat, so that the worm gear 1 can rotate relative to the cam seat 2, thereby protecting the driving motor and prolonging the service life of the intelligent padlock.

[0032] The cam seat 2 is provided with an installation groove 21 for installing the overload spring 4, and the both ends of the installation groove 21 are provided with an opening 22 connected with the linkage groove 111, wherein the both ends of the overload spring 4 abut in the linkage groove 111 after passing through the corresponding opening 22. When the intelligent padlock is used normally, the overload spring 4 can be stably placed in the installation groove 21, and the transmission between the worm gear 1 and the cam seat 2 is realized. When the driving motor is overloaded, the abutting portion 41 of the overload spring 4 will deform and retract into the cam seat 2 from the opening 22, so that the driving motor can rotate relative to the cam seat 2 in the first time, thereby protecting the driving motor.

[0033] The cam seat 2 is provided with a clamping groove 23, and the cam 3 is provided with a clamping block 31 matched with the clamping groove 23. The cam 3 is fixed on the cam seat 2 through the clamping block 31 matched with the clamping groove 23, so as to facilitate the installation of the cam 3 on the cam seat 2.

[0034] The installation hole 11 is provided with a protective sleeve 5 made of rubber material. The protective sleeve 5 is provided with a recessed groove 51 matched with the linkage groove 111. The both abutting portions 41 of the overload spring 4 abut in the corresponding recessed groove 51 after passing through the opening 22. The protective sleeve 5 can avoid the abrasion of the overload spring 4 relative to the worm gear 1, and can also avoid the direct contact between the cam seat 2 and the inner wall of the worm gear 1, thereby prolonging the service life of the intelligent padlock.

[0035] The above merely is preferred implementation manner of the present application, the protection scope of the present application is not only limited to the above examples, and belongs to the technical scheme under the idea of the present application all belongs to the protection scope of the present application. It should be pointed out that, for ordinary skilled person in the art, under the premise of not departing from the principle of the present application, some improvements and decorations, these improvements and decorations should also be considered as the protection scope of the present application.

Claims

1. An overload protection structure of an intelligent padlock, comprising a worm wheel and a cam placed on a cam seat; characterized in that: The worm gear is provided with a mounting hole matched with the cam seat, and at least one pair of linkage grooves are arranged on the side wall of the mounting hole; The cam seat is provided with overload springs, and the abutting portions at both ends of the overload springs extend outward and abut against the corresponding linkage grooves, so that the worm gear drives the cam on the cam seat to rotate through the overload springs.

2. The overload protection structure of a smart padlock according to claim 1, characterized in that: The cam seat is provided with a mounting groove for mounting the overload springs, and the two end portions of the mounting groove are provided with openings communicated with the linkage grooves. The two end portions of the overload springs abut against the linkage grooves after passing through the corresponding openings.

3. The overload protection structure of a smart padlock according to claim 2, characterized in that: The cam seat is provided with a clamping groove, and the cam is provided with a clamping block matched with the clamping groove. The cam is fixed on the cam seat through the clamping block matched with the clamping groove.

4. The overload protection structure of a smart padlock according to claim 2 or 3, characterized in that: The mounting hole is provided with a protective sleeve, and the protective sleeve is provided with a recessed groove matched with the linkage groove; the two abutting portions of the overload springs abut against the corresponding recessed grooves after passing through the openings.

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