CN219138656U

CN219138656U - Overload protection structure

Info

Publication number: CN219138656U
Application number: CN202223387884.XU
Authority: CN
Inventors: 刘杰; 卢长志; 杜可伟; 黄展超
Original assignee: Guangdong Heron Intelligent Technology Co ltd
Current assignee: Guangdong Heron Intelligent Technology Co ltd
Priority date: 2022-12-16
Filing date: 2022-12-16
Publication date: 2023-06-06
Anticipated expiration: 2032-12-16

Abstract

The utility model relates to an overload protection structure, and belongs to the technical field of lock body protection structures. The gear reduction box is connected to the inner wall of the shell in a gear way, a fourth gear is arranged at the output end of the gear reduction box, one end of the spring is fixed, the other end of the spring is connected with the gear reduction box, the spring is in a stretching state when the fourth gear is meshed with the first gear, and the gear reduction box can slide along the stretching or compression direction of the spring; the gear reduction box comprises a driving motor fixedly connected, a screw is arranged on an output shaft of the driving motor, a fourth gear is connected with the driving shaft of the screw, the fourth gear is meshed with a first gear, the fourth gear is blocked against force to stop rotating, the gear reduction box overcomes the thrust of a spring to enable the gears to be meshed and separated, and the motor and the gears are prevented from being damaged.

Description

Overload protection structure

Technical Field

The utility model belongs to the technical field of lock body protection structures, and particularly relates to an overload protection structure.

Background

As the lock body installed on the door plate, the door handle and the key are mainly used for controlling the bolt to extend and retract to the lock shell panel so as to achieve the purposes of locking and unlocking, the existing lock body is mainly divided into a single-movable lock body, a double-movable lock body and a double-movable double-quick lock body, wherein the single-movable lock body and the double-movable lock body can only be locked and unlocked by using a matched key, and the handle of the double-movable double-quick lock body can be rotated downwards to achieve the purposes of rapidly opening the door and rotating upwards to achieve rapid locking, so that the lock is convenient to use. However, most of the existing double-movable double-quick lock bodies in the market have complex structures, and have the problems of more transmission parts, higher cost, difficult assembly and the like.

At present, the electronic lock is widely applied to various occasions because of high safety. The existing electronic lock is internally provided with a driving device, such as a plurality of gears arranged in the lock body, and the mechanical switch in the lock body is pushed to be closed through the mutual matching rotation of the gears, so as to complete unlocking and locking actions.

The electronic lock mainly uses a driving motor as a driving source to open the lock body, and under the condition of motor failure or power failure, mechanical devices such as a lock cylinder are needed to be used for manual unlocking, but because gears on the motor are locked with a mechanical device inner core in the lock body, the mechanical locks are separated from the motor to be opened, in the existing electronic lock, the aim of automatic separation is generally achieved through complex mechanical transmission such as bolt type clutch, and the like, the clutch parts are easy to deviate while the precision requirement is high, so that the cost of the lock body structure is increased, the number of internal parts is large, and the processing and the assembly are quite difficult.

The utility model provides an overload protection motor module that patent application number was CN202111147077.8 puts forward through the in-process that realizes moment output at driving motor forward rotation and drive moment output gear, the free end of movable pendulum rod sets up the spring that supports the separation blade and makes the spring compress, when driving motor stop action, the free end of spring top movable pendulum rod of spring and make movable pendulum rod reset, the spring that this kind of structure set up between two gear contact surfaces, the surface causes the friction when gear rotates, influence gear life, and overload protection structure is complicated, influence equipment machining efficiency, receive external force to destroy or produce resistance between the gear when the lock body, gear reduction box and gear can't in time separate, easily cause motor and gear damage.

Disclosure of Invention

The utility model aims to provide an overload protection structure which is used for solving the problems that a gear reduction box and a gear cannot be separated in time and the motor and the gear are easy to damage in the prior art.

The aim of the utility model can be achieved by the following technical scheme:

the utility model provides an overload protection structure, includes casing, gear reduction box, first gear and spring, first gear shaft in shells inner wall, reduction gear set up in the casing, the fourth gear is installed to gear reduction box's output, the one end of spring is fixed, the other end of spring with gear reduction box is connected, the fourth gear with when first gear meshing the spring is tensile state, gear reduction box can be followed the spring tensile or compression direction slip.

As a further scheme of the utility model: the gear reduction box comprises a driving motor and a box shell which are fixedly connected, wherein a screw is arranged on an output shaft of the driving motor, a fourth gear is connected with the screw in a driving mode, a main body accommodating cavity is formed in the box shell, a fixing shaft is fixedly connected to one side of the main body accommodating cavity, and the end portion of an output shaft of the driving motor is connected with the fixing shaft in a rotating mode.

As a further scheme of the utility model: the box body is characterized in that a side, far away from the first gear, of the box body shell is provided with a side plate, a mounting hole with a circular structure is formed in the side plate, one end of the spring is fixedly connected with the first baffle of the box body shell, and the other end of the spring protrudes out of the mounting hole and is located in the main body accommodating cavity.

As a further scheme of the utility model: the diameter of the mounting hole is smaller than that of the spring.

As a further scheme of the utility model: the first mounting shaft and the second mounting shaft are fixedly arranged in the shell.

As a further scheme of the utility model: the first mounting shaft is rotatably connected with the first gear.

The utility model has the beneficial effects that:

according to the overload protection structure disclosed by the utility model, the first gear is rotatably arranged on the first installation shaft, the fourth gear is meshed with the first gear to generate tension along the meshing line, the spring is in a stretched state at the moment, when the fourth gear of the gear reduction box is blocked by resistance, the spring generates elastic restoring force to pull the gear reduction box away from the first gear, and the fourth gear is separated from the first gear, so that the effect of protecting the driving motor and each gear is achieved, the structure is simple, and the assembly efficiency is improved.

Drawings

The utility model is further described below with reference to the accompanying drawings.

Fig. 1 is a schematic view of the internal structure of a housing of an overload protection structure according to the present utility model;

FIG. 2 is a schematic diagram of the internal structure of a gear reduction box with an overload protection structure according to the present utility model;

FIG. 3 is a schematic diagram of the overall structure of a gear reduction box with an overload protection structure according to the present utility model;

FIG. 4 is a schematic structural view of a third baffle plate of an overload protection structure according to the present utility model;

fig. 5 is a schematic structural diagram of an overload protection structure according to the present utility model, in which a first gear meshes with a fourth gear at a position a;

fig. 6 is a schematic structural diagram of an overload protection structure according to the present utility model, in which the first gear is separated from the fourth gear at B.

In the figure: 1. a first gear; 2. a second gear; 3. a third gear; 4. a gear reduction box; 41. a driving motor; 42. a fourth gear; 43. a case housing; 44. a main body accommodating chamber; 45. a side plate; 46. a mounting hole; 47. a screw; 48. a fixed shaft; 5. a spring; 6. a housing; 601. a main lock bolt assembly; 602. a main bolt dialing block assembly; 603. a lower cover assembly; 604. a first baffle; 605. a first connection plate; 606. a second connecting plate; 607. a second baffle; 608. a third baffle; 7. a first mounting shaft; 8. a second mounting shaft; 9. and a third mounting shaft.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

As shown in fig. 1-4, an overload protection structure comprises a housing 6, wherein the housing 6 is of a square structure formed by connecting a first connecting plate 605, a first baffle 604, a second baffle 607, a second connecting plate 606 and two third baffles 608, the bottom surfaces of the left side and the right side of the first connecting plate 605 are respectively connected with the first baffle 604 and the second baffle 607, the bottoms of the first baffle 604 and the second baffle 607 are respectively connected with the second connecting plate 606, the left side and the right side of the first baffle 604 and the second baffle 607 are respectively connected with the third baffle 608, screw holes and lock holes are formed in the first connecting plate 605, the installation is convenient, a main lock tongue assembly 601 is installed in the housing 6, the square tongue of the main lock tongue assembly 601 is inserted in the lock hole in a telescopic manner, a main lock tongue shifting block assembly 602 is connected below the main lock tongue assembly 601, and a lower cover assembly 603 is arranged on the third baffle 608;

the gear reduction box 4 is arranged at the lower left corner of the main bolt shifting block assembly 602, the gear reduction box 4 comprises a driving motor 41, a fourth gear 42, a box body shell 43, a main body accommodating cavity 44, a side plate 45 and a fixed shaft 48, the main body accommodating cavity 44 is formed in the box body shell 43, the driving motor 41 is fixed above the main body accommodating cavity 44, the fixed shaft 48 is fixedly arranged under an output shaft of the driving motor 41, the output shaft of the driving motor 41 protrudes out of the main body accommodating cavity 44 and is rotationally connected with the fixed shaft 48, the output shaft of the driving motor 41 is connected with a screw 47, the screw 47 is in driving connection with the fourth gear 42, the left side of the main body accommodating cavity 44 is connected with the side plate 45, a mounting hole 46 with a circular structure is formed in the side plate 45, one end of the spring 5 penetrates through the mounting hole 46 and is fixed in the main body accommodating cavity 44, the other end of the spring 5 is fixed on the first baffle 604, the spring 5 is in a cylindrical spiral structure, the diameter of the mounting hole 46 is smaller than the diameter of the spring 5, and the gear reduction box 4 can slide along the stretching or compressing direction of the spring 5;

a third mounting shaft 9 is arranged on the main bolt shifting block assembly 602, a third gear 3 is rotatably arranged on the third mounting shaft 9, a second mounting shaft 8 is arranged at the lower left side of the third mounting shaft 9, a second gear 2 is rotatably arranged on the second mounting shaft 8, a first mounting shaft 7 is arranged at the left side of the second mounting shaft 8, a first gear 1 is rotatably arranged on the first mounting shaft 7, the third gear 3 is meshed with the second gear 2, the second gear 2 is meshed with the first gear 1, and the first gear 1 is meshed with the fourth gear 42;

as shown in fig. 5 to 6, the a is a state where the fourth gear 42 is engaged with the first gear 1, and the B is a state where the fourth gear 42 is disengaged from the first gear 1; the first gear 1 is rotatably mounted on the first mounting shaft 7, when the fourth gear 42 is meshed with the first gear 1 for rotation, the spring 5 is in a stretched state, when the fourth gear 42 is meshed with the first gear 1 for rotation, tension is generated along a meshing line and balanced with the tension of the spring 5, when the fourth gear 42 of the gear reduction box 4 is blocked from rotating, the tension generated along the meshing line when the fourth gear 42 is meshed with the first gear 1 disappears, the spring 5 can generate elastic restoring force, the gear reduction box 4 is pulled away from the first gear 1, and the fourth gear 42 is separated from the first gear 1, so that the driving motor 41 and each gear are protected.

The working principle of the overload protection structure related by the utility model is as follows:

the first gear 1 is rotatably mounted on the first mounting shaft 7, a tension is generated along a meshing line when the fourth gear 42 is meshed with the first gear 1, the spring 5 is in a stretched state at the moment, when the fourth gear 42 of the gear reduction box 4 is blocked by force to stop rotating, the tension generated along the meshing line when the fourth gear 42 is meshed with the first gear 1 disappears, the spring 5 can generate elastic restoring force, and at the moment, the gear reduction box 4 can overcome the thrust of the spring 5 to enable the fourth gear 42 to be meshed and separated with the first gear 1, so that the driving motor 41 and each gear are protected.

The foregoing describes one embodiment of the present utility model in detail, but the description is only a preferred embodiment of the present utility model and should not be construed as limiting the scope of the utility model. All equivalent changes and modifications within the scope of the present utility model are intended to be covered by the present utility model.

Claims

1. The utility model provides an overload protection structure, its characterized in that, includes casing (6), gear reduction box (4), first gear (1) and spring (5), first gear (1) coupling in casing (6) inner wall, the gear box speed reduction set up in casing (6), fourth gear (42) are installed to the output of gear reduction box (4), the one end of spring (5) is fixed, the other end of spring (5) with gear reduction box (4) are connected, fourth gear (42) with spring (5) are tensile state when first gear (1) meshing, gear reduction box (4) can be followed spring (5) tensile or compression direction are slided.

2. An overload protection structure according to claim 1, wherein the gear reduction box (4) comprises a driving motor (41) and a box casing (43) which are fixedly connected, an output shaft of the driving motor (41) is provided with a screw (47), the screw (47) is in driving connection with a fourth gear (42), a main body accommodating cavity (44) is arranged in the box casing (43), one side of the main body accommodating cavity (44) is fixedly connected with a fixed shaft (48), and an end part of the output shaft of the driving motor (41) is in rotating connection with the fixed shaft (48).

3. An overload protection structure according to claim 2, wherein a side plate (45) is arranged on one side of the box casing (43) away from the first gear (1), a mounting hole (46) with a circular structure is formed in the side plate (45), one end of the spring (5) is fixedly connected with a first baffle plate (604) of the casing (6), and the other end of the spring (5) protrudes out of the mounting hole (46) and is located in the main body accommodating cavity (44).

4. An overload protection arrangement according to claim 3, characterized in that the diameter of the mounting hole (46) is smaller than the diameter of the spring (5).

5. An overload protection arrangement according to claim 1, characterised in that the housing (6) has a first mounting shaft (7) and a second mounting shaft (8) fixedly mounted therein.

6. An overload protection arrangement according to claim 5, characterised in that the first mounting shaft (7) is rotatably connected to the first gear (1).