A power failure brake for rotating shaft system and its control method

Abstract

A power-off brake for a rotating shaft system and its control method are disclosed, belonging to the field of motor braking technology. This invention solves the problem that existing power-off brakes cannot brake any segment of the shaft and pose a potential hazard to the turntable's performance. The base is fixedly connected to an electromagnet; the connecting shaft is fixedly connected to an armature; the brake's limiting groove is inserted into a limiting protrusion on the outer shell; the connecting shaft is inserted into the brake's movement groove and slides within it; the brake's braking end is in contact with the shaft; the armature's guide post is slidably connected to the base's guide groove; and multiple springs are installed on the outside of the base's guide groove. This power-off brake for a rotating shaft system is suitable for precision photoelectric turntables sensitive to axial force.

Description

Technical Field

[0001] This invention relates to the field of electric motor braking technology, specifically to a de-energized brake for rotating shaft systems and its control method. Background Technology

[0002] To reduce power loss and mechanical vibration, photoelectric turntables generally use direct-drive motors and lack power-off self-locking. During transportation or when work is paused, they are often mechanically locked, such as by mechanical locks or screws. This method can only lock the photoelectric turntable when it is in a special position and cannot lock it in any position. In the event of a sudden power loss during operation, mechanical locking is difficult to perform power-off braking.

[0003] Furthermore, in the prior art, patent document CN110905942A discloses a "symmetrical dry friction electromagnetic power-off brake," which increases the braking torque by increasing the number of friction plates. Under the same braking torque, each friction plate experiences less friction, increasing the service life of the friction plates and improving braking reliability. However, existing motor power-off brakes are suitable for shaft end locking, requiring the application of axial force to the friction plates to make them in close contact with the shaft end to achieve braking. The installation position of such brakes is limited to the shaft end, increasing the axial length of the turntable, and the long-term application of axial force to the shaft in the locked state poses a potential risk of damaging the turntable performance.

[0004] Therefore, existing power-off brakes have the following drawbacks:

[0005] 1) Due to installation location limitations, the axial length of the turntable was increased;

[0006] 2) Applying axial force to the shaft for a long time while it is locked may damage the performance of the turntable.

[0007] In summary, existing power-off brakes cannot brake any segment of the shaft and pose a potential hazard to the turntable's performance. Summary of the Invention

[0008] This invention solves the problem that existing power failure brakes cannot brake any segment of the shaft and pose a potential hazard to the performance of the turntable.

[0009] The present invention provides a rotating shaft system power failure brake, which includes a base, a connecting shaft, a brake, an armature, an electromagnet, a spring, a guide groove, a limiting protrusion, a limiting groove, a moving groove, a braking end, and a guide post.

[0010] The base is fixedly connected to the electromagnet;

[0011] The connecting shaft is fixedly connected to the armature;

[0012] The limiting groove of the brake is inserted into the limiting protrusion of the outer shell;

[0013] A connecting shaft is inserted into the movement groove of the brake, and the connecting shaft slides in the movement groove of the brake.

[0014] The brake end of the brake is connected to the shaft.

[0015] The armature's guide post is slidably connected to the base's guide groove;

[0016] Multiple springs are mounted on the outside of the guide groove of the base.

[0017] Furthermore, in one embodiment of the present invention, the power failure brake further includes a housing;

[0018] The outer shell is fixed to the base.

[0019] Furthermore, in one embodiment of the present invention, the outer shell is provided with a limiting protrusion;

[0020] The limiting protrusion of the outer shell limits the brake.

[0021] Furthermore, in one embodiment of the present invention, the brake may be provided in multiple forms.

[0022] Furthermore, in one embodiment of the present invention, the plurality of armatures further include connecting protrusions;

[0023] The connecting protrusion of the armature is fixedly connected to the connecting shaft.

[0024] Furthermore, in one embodiment of the present invention, the springs are evenly distributed circumferentially along the central axis on the outer side of the guide groove of the base.

[0025] The present invention discloses a control method for a rotating shaft system power failure brake, wherein the control method is implemented using any of the rotating shaft system power failure brakes described above, specifically as follows:

[0026] When the power-off brake is locked, the electromagnet is de-energized, and the armature moves away from the electromagnet, which in turn drives the connecting shaft to move together. Under the combined action of the connecting shaft and the moving groove, the brake retracts inward along the limiting protrusion to lock the shaft.

[0027] When the power-off brake is released, the electromagnet is energized, and as the armature approaches the electromagnet, it drives the connecting shaft to move together. Under the combined action of the connecting shaft and the moving groove, the brake spreads outward along the limiting protrusion, thus releasing the shaft.

[0028] Furthermore, in one embodiment of the present invention, the armature is moved away from the electromagnet, specifically as follows:

[0029] The armature moves away from the electromagnet along the guide groove under the action of the spring;

[0030] The armature is close to the electromagnet, specifically:

[0031] The armature moves closer to the electromagnet along the guide groove under the action of the spring.

[0032] This invention solves the problem that existing power-off brakes cannot brake any segment of the shaft and pose a potential hazard to the turntable's performance. Specific beneficial effects include:

[0033] 1. The present invention provides a de-energized brake for a rotating shaft. Existing de-energized brakes cannot lock at any position on the shaft, thus limiting the shaft's installation location. The present invention, through the interconnection of the shaft, brake, armature, electromagnet, and spring, forms a de-energized brake that can brake at any segment of the shaft, solving the problem of limited shaft installation location in existing technologies. This is a technical problem that people have been trying to solve but have been unable to.

[0034] 2. The rotating shaft power failure brake of the present invention is made of a base, a housing, a connecting shaft, a brake, an armature, an electromagnet and a spring. Therefore, the power failure brake has a simple and reliable structure.

[0035] 3. The control method for a rotating shaft power-off brake described in this invention addresses the issue that existing power-off brakes apply axial force to the shaft for an extended period when locked, posing a potential risk of damaging turntable performance. In contrast, the power-off brake described in this invention applies a contact force perpendicular to the axial direction that cancels out the force, and no axial force is applied during locking; therefore, it does not damage the turntable's performance.

[0036] The rotating shaft power failure brake described in this invention is suitable for precision photoelectric turntables that are sensitive to axial force. Attached Figure Description

[0037] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, wherein:

[0038] Figure 1 This is a schematic diagram of the power failure brake described in Embodiment 1;

[0039] Figure 2 This is an assembly cross-sectional view of the power failure brake as described in Embodiment 1 when it is released;

[0040] Figure 3 This is an assembly cross-sectional view of the power failure brake when locked, as described in Embodiment 1.

[0041] Figure 4 This is a top view of the power failure brake as described in Embodiment 1 when it is released;

[0042] Figure 5 This is a top view of the power failure brake as described in Embodiment 1 when it is locked.

[0043] Figure 6 This is a schematic diagram of the housing of the power failure brake described in Embodiment 1;

[0044] Figure 7 This is a schematic diagram of the connecting shaft of the power failure brake described in Embodiment 1;

[0045] Figure 8 This is a schematic diagram of the brake structure of the power-off brake described in Embodiment 1;

[0046] Figure 9 This is a schematic diagram of the armature structure of the power-off brake described in Embodiment 1;

[0047] In the diagram, 1 is the base, 11 is the guide groove, 2 is the outer shell, 21 is the limiting protrusion, 3 is the connecting shaft, 4 is the brake, 41 is the limiting groove, 42 is the motion groove, 43 is the braking end, 5 is the armature, 51 is the connecting protrusion, 52 is the guide post, 6 is the electromagnet, and 7 is the spring. Detailed Implementation

[0048] Various embodiments of the present invention will now be clearly and completely described with reference to the accompanying drawings. The embodiments described with reference to the drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0049] Implementation Method 1: The rotating shaft system power failure brake described in this implementation method includes a base 1, a connecting shaft 3, a brake 4, an armature 5, an electromagnet 6, a spring 7, a guide groove 11, a limiting protrusion 21, a limiting groove 41, a moving groove 42, a braking end 43, and a guide post 52.

[0050] The base 1 is fixedly connected to the electromagnet 6;

[0051] The connecting shaft 3 is fixedly connected to the armature 5;

[0052] The limiting groove 41 of the brake 4 is inserted into the limiting protrusion 21 of the outer shell 2;

[0053] A connecting shaft 3 is inserted into the movement groove 42 of the brake 4, and the connecting shaft 3 slides in the movement groove 42 of the brake 4.

[0054] The brake end 43 of the brake 4 is connected to the shaft.

[0055] The guide post 52 of the armature 5 is slidably connected to the guide groove 11 of the base 1;

[0056] Multiple springs 7 are mounted on the outside of the guide groove 11 of the base 1.

[0057] In this embodiment, the outer shell 2 is provided with a limiting protrusion 21;

[0058] The limiting protrusion 21 of the outer shell 2 limits the brake 4.

[0059] In this embodiment, the plurality of armatures 5 further include connecting protrusions 51;

[0060] The connecting protrusion 51 of the armature 5 is fixedly connected to the connecting shaft 3.

[0061] In this embodiment, the springs 7 are evenly distributed circumferentially along the central axis on the outer side of the guide groove 11 of the base 1.

[0062] Existing power failure brakes require applying axial force to the friction pads. The installation position of such power failure brakes is limited to the shaft end, which increases the axial length of the turntable. Furthermore, in the locked state, axial force is applied to the motor shaft for a long time, which may damage the turntable performance.

[0063] To solve the aforementioned technical problems, in this embodiment, as follows: Figure 1-9 As shown, the power failure brake includes a base 1, a connecting shaft 3, a brake 4, an armature 5, an electromagnet 6, and a spring 7.

[0064] The base 1 is provided with a guide groove 11;

[0065] The outer shell 2 is provided with a limiting protrusion 21;

[0066] The brake 4 is provided with a limiting groove 41, a movement groove 42 and a braking end 43;

[0067] The armature 5 is provided with a connecting protrusion 51 and a guide post 52;

[0068] The base 1 has an armature 5, which allows the guide post 52 of the armature 5 to slide within the guide groove 11 of the base 1, thereby limiting the guide post 52 by the guide groove 11.

[0069] The connecting protrusion 51 of the armature 5 is fixedly connected to the connecting shaft 3;

[0070] The limiting groove 41 of the brake 4 is inserted into the limiting protrusion 21 of the outer shell 2, so that the limiting groove 41 and the limiting protrusion 21 are slidably connected, thereby limiting the brake 4. The connecting shaft 3 is inserted in the moving groove 42, so that the connecting shaft 3 slides in the moving groove 42. The brake end 43 is in contact with the shaft in the locked state, and its contact part can be made of friction material or processed into a surface with high friction.

[0071] Multiple brakes 4 may be provided;

[0072] The electromagnet 6 is fixedly connected to the base 1;

[0073] Multiple springs 7 are evenly installed circumferentially along the central axis on the outside of the guide groove 11 of the base 1.

[0074] This power-off brake can brake at any segment of the shaft, thus avoiding installation location limitations. In other words, the power-off brake can be installed at different positions on the shaft, such as both ends, the center line, etc. Therefore, braking can be achieved regardless of where the shaft rotates. Thus, the power-off brake described in this embodiment effectively solves the technical problems existing in the prior art.

[0075] Implementation Method 2: A control method for a rotating shaft system power failure brake as described in this implementation method is implemented using the rotating shaft system power failure brake described in the above implementation method, specifically as follows:

[0076] When the power-off brake is locked, the electromagnet 6 is de-energized, and the armature 5 moves away from the electromagnet 6, which drives the connecting shaft 3 to move together. Under the combined action of the connecting shaft 3 and the moving groove 43, the brake 4 retracts inward along the limiting protrusion 21 to lock the shaft.

[0077] When the power-off brake is released, the electromagnet 6 is energized, and the armature 5 moves close to the electromagnet 6, which drives the connecting shaft 3 to move together. Under the combined action of the connecting shaft 3 and the moving groove 43, the brake 4 spreads outward along the limiting protrusion 21, thus releasing the shaft.

[0078] In this embodiment, the armature 5 is located away from the electromagnet 6, specifically as follows:

[0079] Under the action of spring 7, armature 5 moves away from electromagnet 6 along guide groove 11;

[0080] The armature 5 is located near the electromagnet 6, specifically as follows:

[0081] The armature 5 moves along the guide groove 11 towards the electromagnet 6 under the action of the spring 7.

[0082] The existing power-off brake applies axial force to the shaft for a long time when it is locked, which may damage the turntable performance.

[0083] To solve the technical problems existing in the prior art, when the power-off brake described in this embodiment is locked, the electromagnet 6 is de-energized, the armature 5 moves away from the electromagnet 6 along the guide groove 11 under the action of the spring 7, the connecting shaft 3 and the armature 5 move together, and the brake 4 retracts inward along the limiting protrusion 21 under the combined action of the connecting shaft 3 and the moving groove 43, thereby locking the shaft.

[0084] When the power-off brake described in this embodiment is released, the electromagnet 6 is energized, and the armature 5 approaches the electromagnet 6 along the guide groove 11 under the action of the spring 7. The connecting shaft 3 and the armature 5 move together, and the brake 4 spreads outward along the limiting protrusion 21 under the combined action of the connecting shaft 3 and the moving groove 43, thus releasing the shaft.

[0085] The contact force applied to the shaft by the power failure brake described in this embodiment is perpendicular to the axial direction and cancels each other out. No axial force is applied when locking. Therefore, it will not damage the performance of the turntable. The control method of this power failure brake can effectively solve the technical problems existing in the prior art.

[0086] The present invention provides a detailed description of a rotating shaft system power failure brake and its control method. Specific examples have been used to illustrate the principle and implementation of the invention. The description of the above embodiments is only for the purpose of helping to understand the method and core idea of ​​the invention. At the same time, for those skilled in the art, there will be changes in the specific implementation and application scope based on the idea of ​​the invention. Therefore, the content of this specification should not be construed as a limitation of the invention.

Claims

1. A de-energizing brake for a rotating shaft system, characterized in that, The power failure brake includes a base (1), a connecting shaft (3), a brake (4), an armature (5), an electromagnet (6), a spring (7), a guide groove (11), a limiting protrusion (21), a limiting groove (41), a moving groove (42), a braking end (43), and a guide post (52). The base (1) is fixedly connected to the electromagnet (6); The connecting shaft (3) is fixedly connected to the armature (5); The limiting groove (41) of the brake (4) is inserted into the limiting protrusion (21) of the outer shell (2); A connecting shaft (3) is inserted into the movement groove (42) of the brake (4), and the connecting shaft (3) slides in the movement groove (42) of the brake (4); The brake end (43) of the brake (4) is connected to the shaft in contact; The guide post (52) of the armature (5) is slidably connected to the guide groove (11) of the base (1); Multiple springs (7) are mounted on the outside of the guide groove (11) of the base (1).

2. A de-energizing brake for a rotating shaft system according to claim 1, characterized in that, The power failure brake also includes a housing (2); The outer shell (2) is fixed on the base (1).

3. A de-energizing brake for a rotating shaft system according to claim 2, characterized in that, The outer shell (2) is provided with a limiting protrusion (21); The limiting protrusion (21) of the outer shell (2) limits the brake (4).

4. A de-energizing brake for a rotating shaft system according to claim 1, characterized in that, The brake (4) can be provided in multiple ways.

5. A de-energizing brake for a rotating shaft system according to claim 1, characterized in that, The armatures (5) further include connecting protrusions (51); The connecting protrusion (51) of the armature (5) is fixedly connected to the connecting shaft (3).

6. A de-energizing brake for a rotating shaft system according to claim 1, characterized in that, The springs (7) are evenly distributed circumferentially along the central axis on the outside of the guide groove (11) of the base (1).

7. A control method for a rotating shaft system power-off brake, wherein the control method is implemented using a rotating shaft system power-off brake as described in any one of claims 1-6, characterized in that, Specifically: When the power-off brake is locked, the electromagnet (6) is de-energized, and the armature (5) moves away from the electromagnet (6), while it drives the connecting shaft (3) to move together. Under the combined action of the connecting shaft (3) and the moving groove (43), the brake (4) retracts inward along the limiting protrusion (21) to lock the shaft. When the power-off brake is released, the electromagnet (6) is energized, and the armature (5) moves close to the electromagnet (6), which drives the connecting shaft (3) to move together. Under the combined action of the connecting shaft (3) and the moving groove (43), the brake (4) spreads outward along the limiting protrusion (21) to release the shaft.

8. The control method for a de-energized brake of a rotating shaft system according to claim 7, characterized in that, The armature (5) is located away from the electromagnet (6), specifically as follows: The armature (5) moves away from the electromagnet (6) along the guide groove (11) under the action of the spring (7); The armature (5) is close to the electromagnet (6), specifically: The armature (5) moves along the guide groove (11) towards the electromagnet (6) under the action of the spring (7).

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