A rotary motion part locking structure with adjustable locking force

Abstract

The application discloses a locking structure with adjustable locking force for a rotary motion part, which comprises a locking nut assembly and an electric screw rod. The locking nut assembly comprises a locking nut fixing seat, a butterfly spring, a locking nut, a reset spring, a plug, a trigger block, a position reaching switch and a position reaching switch support seat. The electric screw rod comprises a stepping motor, a positioning lock fixing seat, an outer bearing pressing ring, an inner bearing pressing ring, a locking screw rod, a key and a rolling bearing. The locking screw rod is driven to rotate by the stepping motor, and the tangential rotation into or out of the locking nut realizes the positioning locking and separation. The reset spring is installed at the back of the locking nut, one end of the reset spring presses the locking nut, and the other end of the reset spring presses the plug. When the locking screw rod is rotated into the locking nut, the locking nut retreats, the reset spring is compressed, and the locking screw rod smoothly enters the locking nut assembly. According to the application, the locking structure with adjustable locking force for the rotary motion part after the motion is provided, and the structure is simple, safe and reliable.

Description

Technical Field

[0001] This invention relates to the field of electric locking technology after a rotating component has moved into position, and particularly to a locking structure with adjustable locking force for a rotating component. Background Technology

[0002] Currently, most electric locking structures are not suitable for locking after the rotating parts have moved into place, the screw cannot be screwed tangentially into the nut, and the magnitude of the preload is uncontrollable.

[0003] The project involves the locking of a large folding mechanism after it has been unfolded. The electric screw must be screwed into the locking nut accurately and reliably, and the preload of the locking structure must be strictly controlled to ensure contact rigidity after unfolding. A novel locking structure with adjustable locking force must be designed to ensure reliable locking of the rotating parts after they have reached their designated positions. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a novel locking structure with adjustable locking force for rotary motion components. The locking structure with adjustable locking force for rotary motion components implemented by this structure has the characteristics of simple structure, high reliability, and known preload, which meets the needs of the project.

[0005] The technical solution adopted by this invention to solve the above-mentioned technical problems is as follows: a locking structure with adjustable locking force for a rotary motion component, including a locking nut assembly and an electric screw. The locking nut assembly includes a locking nut fixing seat, a butterfly spring, a locking nut, a return spring, a plug, a trigger block, a stop switch, and a stop switch support seat. The electric screw includes a stepper motor, a positioning lock fixing seat, an outer bearing pressure ring, an inner bearing pressure ring, a locking screw, a key, and a rolling bearing. The rotational movement of the locking screw requires a stepper motor and a rolling bearing. The stepper motor drives the locking screw to rotate, and the tangential screwing in or out of the locking nut achieves positioning locking and disengagement. The rolling bearing is used for radial positioning and can withstand axial loads. The stepper motor and the locking screw transmit force through a key. The positioning lock fixing seat is used for... The outer ring, outer pressure ring, and inner pressure ring of the fixed rolling bearing are used to limit the axial displacement of the rolling bearing. A return spring is installed on the back of the locking nut. One end of the return spring presses against the locking nut, and the other end presses against the plug. When the locking screw is screwed into the locking nut, the locking nut retracts, the return spring is compressed, and the locking screw smoothly enters the locking nut assembly. When the locking screw is aligned with the axis of the locking nut, the return spring provides thrust to the locking nut, ensuring that the locking screw is reliably screwed into the locking nut. The locking nut transmits force to the nut fixing seat through the compression disc spring. The nut fixing seat is connected to the rotating structure. The back-and-forth movement of the locking nut drives the trigger block to move back and forth. After the trigger block reaches its position, it triggers the position switch fixed on the locking nut fixing seat through the position switch support seat, and the locking screw stops rotating.

[0006] When the locking screw is tangentially screwed into or out of the locking nut, the locking nut mounting base and the disc spring need to avoid the movement trajectory of the locking screw. A return spring is installed on the back of the locking nut. When the locking screw is screwed in, the locking nut retracts, and the locking screw smoothly enters the locking nut assembly. When the locking screw and the locking nut axis are aligned, the return spring provides thrust to the locking nut, ensuring that the locking screw is reliably screwed into the locking nut.

[0007] After the locking screw is screwed into the locking nut, the position of the position switch is adjusted to control the deformation of the compressed disc spring when the stepper motor is de-energized, thereby controlling the preload between the locking screw and the locking nut.

[0008] The principle of this invention lies in a novel locking structure with adjustable locking force for a folding mechanism. This adjustable locking structure consists of a locking nut assembly and an electric screw. The locking nut assembly includes a locking nut fixing seat, a butterfly spring, a locking nut, a return spring, a plug, a trigger block, a stop switch, and a stop switch support seat. The electric screw includes a stepper motor, a positioning lock fixing seat, an outer bearing pressure ring, an inner bearing pressure ring, a locking screw, a key, and a rolling bearing. The stepper motor drives the locking screw to rotate, tangentially screwing in or out of the locking nut to achieve positioning locking and disengagement.

[0009] First, a locking nut assembly was designed. The locking screw is tangentially screwed into or out of the locking nut. The locking nut mounting base and the disc spring need to avoid the movement trajectory of the locking screw. A return spring is installed on the back of the locking nut. When the locking screw is screwed in, the locking nut retracts, and the locking screw smoothly enters the locking nut assembly. When the locking screw and the locking nut axis are aligned, the return spring provides thrust to the locking nut, ensuring that the locking screw is reliably screwed into the locking nut.

[0010] Secondly, after the locking screw is screwed into the locking nut, the locking nut moves back and forth, causing the trigger block to move back and forth. By adjusting the position of the position switch, the deformation of the disc spring at the front end of the locking nut when the stepper motor is powered off is controlled, thereby controlling the preload between the locking screw and the locking nut.

[0011] Furthermore, the front end of the locking screw is designed with a spherical structure to prevent interference between the locking screw and the locking nut during screwing in or out.

[0012] The beneficial effects of this invention compared to the prior art are as follows:

[0013] (1) The present invention overcomes the shortcomings of the prior art and provides a locking structure with adjustable locking force after the rotating component moves into position. The structure is simple, safe and reliable.

[0014] (2) The present invention measures the preload of the locking structure by the compression of the disc spring.

[0015] (3) The present invention has made a special design for the locking nut structure, which further enhances the reliability of use. Attached Figure Description

[0016] Figure 1(a) is a cross-sectional view of the locking nut assembly structure in the locking structure with adjustable locking force of the rotary motion component of the present invention;

[0017] Figure 1(b) is a top view of the locking nut assembly structure in the locking structure with adjustable locking force of the rotary motion component of the present invention;

[0018] Figure 2 This is a structural diagram of the electric screw of the present invention;

[0019] The meanings of the labels in the attached diagram are as follows: 1-locking nut fixing seat, 2-butterfly spring, 3-locking nut, 4-reset spring, 5-plug, 6-trigger block, 7-position switch, 8-position switch support seat, 9-stepper motor, 10-positioning lock fixing seat, 11-bearing outer pressure ring, 12-bearing inner pressure ring, 13-locking screw, 14-key, 15-rolling bearing. Detailed Implementation

[0020] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

[0021] This invention describes a locking structure with adjustable locking force, in which an electric screw is needed to stably lock and disengage with the locking nut when the rotary moving accessory is in place or disengaged.

[0022] Figure 1(a) is a cross-sectional view of the locking nut assembly structure in the adjustable locking structure of the rotary motion component of the present invention, and Figure 1(b) is a top view of the locking nut assembly structure in the adjustable locking structure of the rotary motion component of the present invention. Figure 2 This is a structural diagram of the electric screw of the present invention.

[0023] As shown in Figure 1(a), Figure 1(b) and Figure 2As shown, the adjustable locking structure of the rotary motion component includes a locking nut assembly and an electric screw. The locking nut assembly includes a locking nut fixing seat 1, a butterfly spring 2, a locking nut 3, a return spring 4, a plug 5, a trigger block 6, a stop switch 7, and a stop switch support 8. The electric screw includes a stepper motor 9, a positioning lock fixing seat 10, an outer bearing pressure ring 11, an inner bearing pressure ring 12, a locking screw 13, a key 14, and a rolling bearing 15. The rotational movement of the locking screw 13 requires the stepper motor 9 and the rolling bearing 15. The stepper motor 9 drives the locking screw 13 to rotate, tangentially screwing in or out of the locking nut 3 to achieve positioning, locking, and disengagement. The rolling bearing 15 is used for radial positioning and can withstand axial loads. The stepper motor 9 and the locking screw 13 transmit force through the key 14. The positioning lock fixing seat 10 is used to fix the outer ring of the rolling bearing 15, the outer bearing pressure ring 11, and the inner bearing pressure ring 12. The pressure ring 12 is used to limit the axial displacement of the rolling bearing 15. A return spring 4 is installed on the back of the locking nut 3. One end of the return spring 4 presses against the locking nut 3, and the other end presses against the plug 5. The plug 5 restricts the position of the spring and provides the spring's reaction force. When the locking screw 13 is screwed into the locking nut 3, the locking nut 3 retracts, the return spring 4 is compressed, and the locking screw 13 smoothly enters the locking nut assembly. When the locking screw 13 is aligned with the axis of the locking nut 3, the return spring 4 provides a thrust to the locking nut 3 to ensure that the locking screw 13 is reliably screwed into the locking nut 3. The locking nut 3 transmits the force to the nut fixing seat 1 through the compression disc spring 2. The nut fixing seat 1 is connected to the rotating structure. The back-and-forth movement of the locking nut 3 drives the trigger block 6 to move back and forth. After reaching the position, the trigger block 6 triggers the position switch 7. The position switch 7 is fixed on the locking nut fixing seat 1 through the position switch support seat 8, and the locking screw 13 stops rotating.

[0024] The deformation of the compression disc spring 2 at the front end of the locking nut 3 when the stepper motor 9 is de-energized can be adjusted by adjusting the position of the position switch 7, thereby controlling the preload between the locking screw 13 and the locking nut 3.

[0025] During the rotation of the rotating structure, the locking screw 13 is tangentially screwed into or out of the locking nut 3. The locking nut fixing seat 1 and the disc spring 2 need to have a sufficient diameter to avoid the movement trajectory of the locking screw 13.

[0026] Figure 2 This is a structural diagram of the electric screw of the present invention, as shown below. Figure 2 As shown, the electric screw includes a stepper motor 9, a positioning lock fixing seat 10, an outer bearing pressure ring 11, an inner bearing pressure ring 12, a locking screw 13, a key 14, and a rolling bearing 15. In one embodiment, the rotational movement of the locking screw 13 requires one stepper motor 9 and one rolling bearing 15.

[0027] In one embodiment, the front end of the locking screw 13 is designed as a spherical structure to avoid interference between the locking screw 13 and the locking nut during screwing in or out.

[0028] Numerous specific details are set forth in the specification provided herein. However, it will be understood that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures, and techniques have not been shown in detail so as not to obscure the understanding of this specification.

[0029] Although the invention has been described with respect to a limited number of embodiments, those skilled in the art will understand from the foregoing description that other embodiments are conceivable within the scope of the invention described herein. Furthermore, it should be noted that the language used in this specification has been chosen primarily for readability and instructional purposes, and not for the purpose of explaining or limiting the subject matter of the invention.

Claims

1. A locking structure with adjustable locking force for a rotary motion component, characterized in that, The assembly includes a locking nut assembly and an electric screw. The locking nut assembly includes a locking nut holder (1), a butterfly spring (2), a locking nut (3), a return spring (4), a plug (5), a trigger block (6), a position switch (7), and a position switch support (8). The electric screw includes a stepper motor (9), a positioning lock holder (10), an outer bearing pressure ring (11), an inner bearing pressure ring (12), a locking screw (13), a key (14), and a rolling bearing (15). The locking screw (13) The rotational motion of the bearing requires a stepper motor (9) and a rolling bearing (15). The stepper motor (9) drives the locking screw (13) to rotate, and the locking nut (3) is screwed in or out tangentially to achieve positioning, locking and disengagement. The rolling bearing (15) is used for radial positioning and can withstand axial loads. The stepper motor (9) and the locking screw (13) are connected by a key (14) for force transmission. The positioning lock fixing seat (10) is used to fix the outer ring of the rolling bearing (15), the outer pressure ring (11) of the bearing, and the inner ring of the bearing. The pressure ring (12) is used to limit the axial displacement of the rolling bearing (15). A return spring (4) is installed on the back of the locking nut (3). One end of the return spring (4) presses against the locking nut (3), and the other end presses against the plug (5). When the locking screw (13) is screwed into the locking nut (3), the locking nut (3) retracts, the return spring (4) is compressed, and the locking screw (13) smoothly enters the locking nut assembly. When the locking screw (13) is aligned with the axis of the locking nut (3), the return spring (4) locks the nut (5). 3) Provide thrust to ensure that the locking screw (13) is reliably screwed into the locking nut (3). The locking nut (3) transmits force to the locking nut fixing seat (1) through the compression disc spring (2). The locking nut fixing seat (1) is connected to the rotating structure. The back and forth movement of the locking nut (3) drives the trigger block (6) to move back and forth. After the trigger block (6) is in place, it triggers the position switch (7) fixed on the locking nut fixing seat (1) through the position switch support seat (8), and the locking screw (13) stops rotating.

2. The locking structure with adjustable locking force for the rotary motion component according to claim 1, characterized in that, By adjusting the position of the position switch (7), the deformation of the compression disc spring (2) at the front end of the locking nut (3) when the stepper motor (9) is de-energized is adjusted, thereby controlling the preload between the locking screw (13) and the locking nut (3).

3. The locking structure with adjustable locking force for the rotary motion component according to claim 1, characterized in that, During the rotation of the rotating structure, the locking screw (13) is tangentially screwed into or out of the locking nut (3). The locking nut fixing seat (1) and the butterfly spring (2) need to reserve a sufficient diameter to avoid the movement trajectory of the locking screw (13).

4. The locking structure with adjustable locking force for the rotary motion component according to claim 1, characterized in that, The front end of the locking screw (13) is designed as a spherical structure to avoid interference between the locking screw (13) and the locking nut during screwing in or out.

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