Lock body inner inclined plane rotating shaft mechanism

Abstract

The utility model discloses a lock body inner inclined plane rotating shaft mechanism, which comprises a rear shaft body, a front shaft body and a rear shaft body, the front shaft body is arranged at the front end of the rear shaft body, a through hole allowing the middle shaft to penetrate through is formed in the center of the front shaft body, and an inclined face is arranged at the front end of the front shaft body. According to the utility model, the inclined rotating shaft is designed into two parts which are combined into a structure similar to a clutch, when the motor is in a normal rotating range, the rear shaft body and the front shaft body can be pressed together under the elastic force of the spring, the normal rotation of the inclined rotating shaft cannot be influenced, and when the motor rotates excessively, the front shaft body can reach a limiting point firstly, and the front shaft body can be separated from the inclined rotating shaft. Then under the action of torsion of continuous rotation of the motor, the spring is compressed to drive the front shaft body to be separated from the rear shaft body, at the moment, the rear shaft body can be driven by the driving motor to continuously rotate to unload overlarge torsion, the torsion of the motor is prevented from being transmitted to the front shaft body, and therefore the phenomenon that the motor mechanism is stuck can be prevented; and normal use of the lock can be ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of locks, and specifically relates to an inclined shaft mechanism inside a lock body. Background Art

[0002] Locks are widely used in various fields of daily life. At present, some locks are driven by motors to achieve unlocking operations.

[0003] In the Chinese patent with the reference publication number CN208280768U, a fingerprint type luggage lock is specifically disclosed, which includes a battery box. A battery accommodation groove for placing a battery is opened on the bottom surface of the battery box, and a lock body accommodation groove for placing a lock body is provided on the top surface of the battery box. A fingerprint lock, a rack, a lock bolt and a lock core are arranged in the lock body accommodation groove. A driving motor and an inclined rotating shaft connected to the output shaft of the driving motor are arranged on the rack. The fingerprint type luggage lock of the utility model has a simple structure, is convenient to unlock and is applicable to luggage.

[0004] The applicant found that since the motors applied in luggage locks or other locks generally have low precision and large torque, over-rotation is likely to occur. Once the motor over-rotates, the inclined surface part of the inclined rotating shaft is likely to be stuck with the connecting plate, resulting in the situation that the motor part cannot return to its original position, thus affecting the normal use of the lock.

[0005] In view of this, an inclined shaft mechanism inside a lock body is proposed. Content of the Utility Model

[0006] The purpose of the utility model is to provide an inclined shaft mechanism inside a lock body in order to solve the above-mentioned problems.

[0007] The technical scheme adopted by the utility model is as follows: An inclined shaft mechanism inside a lock body includes: a rear shaft body, with a central shaft provided at the center of its front end; a front shaft body, which is arranged at the front end of the rear shaft body. A through hole for the central shaft to pass through is opened at the center of the front shaft body. An inclined surface is provided at the front end of the front shaft body. A spring is sleeved outside the central shaft and connected to the front shaft body. The other end of the spring is connected to the external connecting plate or the front end of the central shaft. The front shaft body is tightly pressed against the front end face of the rear shaft body by the elastic force of the spring.

[0008] In a preferred embodiment, a plurality of grooves are circumferentially opened on the front end face of the rear shaft body, and a plurality of protrusions adapted to be engaged in the grooves are formed by protruding on the rear end face of the front shaft body.

[0009] In a preferred embodiment, a spline hole is opened on the rear end face of the rear shaft body, and the rear shaft body is connected to the output end of an external driving motor through the spline hole.

[0010] In a preferred embodiment, the ultimate torque of the spring is less than that of the external drive motor.

[0011] In a preferred embodiment, the central shaft and the rear shaft body are integrally formed.

[0012] In a preferred embodiment, when the other end of the spring is connected to the front end of the central shaft, a limiting member with a diameter larger than that of the spring is provided at the front end of the central shaft, and the limiting member is a retaining pin or a convex ring integrally protruding on the central shaft.

[0013] In a preferred embodiment, a semi-circular convex flange adapted to an external limiting block protrudes from the outer end face of the front shaft body. When the front shaft body is in the initial position, one end face of the semi-circular convex flange contacts the external limiting block, and when the front shaft body rotates to the limit position, the other end face of the semi-circular convex flange contacts the external limiting block.

[0014] In a preferred embodiment, the diameter of the front shaft body is smaller than that of the rear shaft body.

[0015] In a preferred embodiment, the protrusion and the groove have the same shape, and the protrusion is spherical, trapezoidal, conical or other shapes.

[0016] In summary, due to the adoption of the above technical solutions, the beneficial effects of the present utility model are as follows: The inclined rotating shaft is designed into two parts and combined into a structure similar to a clutch. When the motor rotates within the normal range, the rear shaft body and the front shaft body can be combined together under the elastic force of the spring, and synchronous rotation within the specified torque range can be achieved. When the motor overrotates and exceeds the torque of the spring itself, the front shaft body will first reach the limit point, and then under the action of the motor torque, the spring compresses and drives the front shaft body to disengage from the rear shaft body. At this time, the rear shaft body will continue to rotate under the drive of the drive motor to unload the excessive torque, preventing the motor torque from being transmitted to the front shaft body, thereby preventing the motor mechanism from jamming and ensuring the normal use of the lock, which is worthy of promotion. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is an exploded three-dimensional structural schematic diagram of the whole of the present utility model;

[0018] Figure 2 is a three-dimensional structural schematic diagram of the front shaft body in the present utility model;

[0019] Figure 3 is a planar structural schematic diagram of the rear shaft body of the present utility model seen from one side of the spline hole;

[0020] Figure 4 is a planar structural schematic diagram of the whole of the present utility model;

[0021] Figure 5 This is a schematic plan view of the overall structure when the spring is installed on the central shaft in the present utility model.

[0022] Markings in the figure: 1 - rear shaft body, 11 - central shaft, 12 - groove, 13 - spline hole, 2 - front shaft body, 21 - inclined surface, 22 - through hole, 23 - protrusion, 24 - semi-circular flange, 3 - spring. Specific embodiments

[0023] In order to make the purpose, technical solutions and advantages of the present utility model clearer, the following further details the present utility model in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0024] Referring to Figures 1 - 5 , a bevel shaft rotating mechanism in a lock body includes: a rear shaft body 1, with a central shaft 11 provided at the center of its front end; a front shaft body 2, which is provided at the front end of the rear shaft body 1, a through hole 22 for the central shaft 11 to pass through is opened at the center of the front shaft body 2, and an inclined surface 21 is provided at the front end of the front shaft body 2; a spring 3, which is sleeved outside the central shaft 11 and connected to the front shaft body 2, the other end of the spring 3 is connected to an external connecting plate (not shown in the figure) or the front end of the central shaft 11, the front shaft body 2 is tightly pressed against the front end face of the rear shaft body 1 by the elastic force of the spring 3, a spline hole 13 is opened at the rear end face of the rear shaft body 1, and the rear shaft body 1 is connected to the output end of an external drive motor (not shown in the figure) through the spline hole 13. The bevel rotating shaft is designed as two parts and combined into a structure similar to a clutch. When the drive motor rotates within the normal range, the rear shaft body 1 and the front shaft body 2 can be combined together under the elastic force of the spring 3, and synchronous rotation within a specified torque range can be achieved. When the drive motor rotates excessively, at this time the front shaft body 2 will first reach the limit point, and then under the torsional force of the continuous rotation of the drive motor, the spring 3 compresses and drives the front shaft body 2 to disengage from the rear shaft body 1. At this time, the rear shaft body 1 will continue to rotate under the drive of the drive motor to unload the excessive torsional force, preventing the torsional force of the drive motor from being transmitted to the front shaft body 2, thereby preventing the motor mechanism from jamming, ensuring the normal use of the lock, saving the overall cost (that is, there is no need to replace a motor with higher precision and higher cost) while still meeting the normal use of the lock, and is worthy of promotion.

[0025] Furthermore, a semi-circular flange 24 adapted to an external limit block (not shown in the figure, which can be known from the comparative document) protrudes from the outer end face of the front shaft body 2. When the front shaft body 2 is in the initial position, one end face of the semi-circular flange 24 is in contact with the external limit block. When the front shaft body 2 rotates to the limit position, the other end face of the semi-circular flange 24 is in contact with the external limit block. By designing the semi-circular flange 24, the maximum rotation angle of the front shaft body 2 can be limited.

[0026] Furthermore, the output end of the drive motor is provided with a key position adapted to the spline hole 13, and is fixed by a spline connection form, which has greater strength, uniform connection force, and more stable connection performance.

[0027] Refer to Figure 5 As shown, when the other end of the spring 3 is connected to the front end of the central shaft 11, a limiting member with a diameter larger than that of the spring 3 is provided at the front end of the central shaft 11. The limiting member is a retaining pin or a convex ring integrally protruding on the central shaft 11. The position of the spring 3 can be limited and pressed by using the convex ring or the retaining pin, and it is not necessary to connect the spring 3 to an external connecting plate, so that the whole mechanism can be made smaller and the overall structure is more compact.

[0028] Furthermore, the diameter of the front shaft body 2 is smaller than that of the rear shaft body 1, and the rear shaft body 1 can be used as a supporting surface for the front shaft body 2 here.

[0029] Furthermore, a plurality of grooves 12 are circumferentially formed on the front end face of the rear shaft body 1, and a plurality of protrusions 23 adapted to be engaged in the grooves 12 are formed protruding from the rear end face of the front shaft body 2. Through the engagement and cooperation of the grooves 12 and the protrusions 2, the strength after the combination of the rear shaft body 1 and the front shaft body 2 can be ensured, so as to ensure that the front shaft body 2 and the rear shaft body 1 can rotate synchronously. Secondly, during subsequent separation, since the protrusion 23 itself has a slope or an inclined surface, it will not affect the separation operation of the rear shaft body 1 and the front shaft body 2 during over-rotation.

[0030] Among them, the protrusion 23 has the same shape as the groove 12, and the protrusion 23 is spherical, trapezoidal, conical or other shapes.

[0031] Furthermore, the ultimate torque of the spring 3 is less than the ultimate torque of the external drive motor, so that when the drive motor over-rotates, the spring 3 can be correspondingly driven to twist and deform.

[0032] Furthermore, the central shaft 11 and the rear shaft body 1 are integrally formed. Due to being integrally formed, the connection part between the central shaft 11 and the rear shaft body 1 is not easy to break, and the central shaft 11 can also be used as an auxiliary guiding part for the front shaft body 2 here.

[0033] In summary, the inclined rotating shaft is designed into two parts and combined into a structure similar to a clutch. When the drive motor over-rotates, at this time, the front shaft body 2 will first reach the limit point, and then under the action of the torque of the continuous rotation of the drive motor, the spring 3 compresses and drives the front shaft body 2 to disengage from the rear shaft body 1. At this time, the rear shaft body 1 will continue to rotate under the drive of the drive motor to unload the excessive torque, avoiding transmitting the torque of the drive motor to the front shaft body 2, so that the phenomenon of jamming of the motor mechanism can be prevented, and the normal use of the lock can be ensured. At the same time, the above-mentioned inclined rotating shaft mechanism can also be extended to all lock body parts using motors, such as luggage locks, fingerprint locks, safe password locks, etc., and the application scenarios are more extensive.

[0034] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A bevel shaft mechanism in a lock body, characterized in that: include: The rear axle body has a middle axle at the front end center; A front axle body, which is arranged at the front end of the rear axle body, a through hole is opened in the center of the front axle body to allow the middle axle to pass through, and a slope is arranged at the front end of the front axle body; A spring is sleeved on the outside of the middle shaft and connected to the front shaft body, the other end of the spring is connected to an external connecting plate or the front end of the middle shaft, and the front shaft body is pressed tightly against the front end surface of the rear shaft body by the elastic force of the spring.

2. The bevel shaft mechanism in a lock body according to claim 1, characterized in that: A plurality of grooves are circumferentially formed on the front end surface of the rear axle body, and a plurality of protrusions adapted to be engaged in the grooves are protruded from the rear end surface of the front axle body.

3. The bevel shaft mechanism in a lock body according to claim 1, characterized in that: A spline hole is formed on the rear end surface of the rear axle body, and the rear axle body is connected to the output end of an external driving motor through the spline hole.

4. The bevel shaft mechanism in a lock body according to claim 1, characterized in that: The limit torque of the spring is smaller than the limit torque of the external drive motor.

5. The bevel shaft mechanism in a lock body as claimed in claim 1, characterized in that: The middle shaft and the rear shaft body are integrally formed.

6. The bevel shaft mechanism in a lock body according to claim 1, characterized in that: When the other end of the spring is connected to the front end of the central shaft, the front end of the central shaft is provided with a limiter with a diameter larger than the diameter of the spring, and the limiter is a stop pin or a convex ring integrally protruding from the central shaft.

7. The bevel shaft mechanism in a lock body according to claim 1, characterized in that: The outer end surface of the front axle body protrudes to form a semi-annular flange adapted to the external limit block. When the front axle body is in the initial position, one end surface of the semi-annular flange contacts the external limit block. When the front axle body rotates to the extreme position, the other end surface of the semi-annular flange contacts the external limit block.

8. The bevel shaft mechanism in a lock body as claimed in claim 1, characterized in that: The diameter of the front axle body is smaller than the diameter of the rear axle body.

9. The inclined rotating shaft mechanism in a lock body as claimed in claim 2, characterized in that: The protrusion has the same shape as the groove, and the protrusion is spherical, trapezoidal, conical or other shapes.

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