Locking structure with adjustable locking force for rotary motion component

Abstract

The invention discloses a rotary motion component locking force adjustable locking structure which comprises a locking nut assembly and an electric screw, the locking nut assembly comprises a locking nut fixing seat, a belleville spring, a locking nut, a reset spring, a plug, a trigger block, an in-place switch and an in-place switch supporting seat; the electric screw rod comprises a stepping motor, a positioning lock fixing seat, a bearing outer pressing ring, a bearing inner pressing ring, a locking screw rod, a key and a rolling bearing, the stepping motor drives the locking screw rod to rotate, the locking screw rod is tangentially screwed in or out of a locking nut to achieve positioning locking and separation, a reset spring is installed on 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 rolling bearing. When the locking screw is screwed into the locking nut, the locking nut retreats, the reset spring is compressed, and the locking screw smoothly enters the locking nut assembly. According to the scheme, the locking structure with the adjustable locking force after the rotary component moves in place is provided, and the locking structure is simple in structure, safe and reliable.

Description

Technical Field

[0001] The invention relates to the technical field of electric locking after a rotary component moves into position, and in particular to a locking structure of a rotary component with adjustable locking force. Background Art

[0002] At present, most electric locking structures are not suitable for locking after the rotating parts move into place, the screw cannot be screwed into the nut tangentially, and the size of the pre-tightening force cannot be controlled.

[0003] The project involved is the locking of a large folding and unfolding mechanism after it is unfolded. The electric screw must be screwed into the locking nut accurately and reliably, and in order to ensure the contact stiffness after it is unfolded, the preload force of the locking structure must be strictly controlled. A new type of locking structure with adjustable locking force must be designed to ensure that the rotating moving parts are reliably locked after they are in place. 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 of a rotary motion component. The locking structure with adjustable locking force of a rotary motion component realized by this structure has the characteristics of simple structure, high reliability, known preload force, etc., which meets the use of the project.

[0005] The technical solution adopted by the present invention to solve the above technical problems is: a locking structure with adjustable locking force of a rotary motion component, including a locking nut assembly and an electric screw, the locking nut assembly including a locking nut fixing seat, a butterfly spring, a locking nut, a reset spring, a plug, a trigger block, an in-position switch, and an in-position switch support seat, the electric screw includes a stepping motor, a positioning lock fixing seat, a bearing outer pressure ring, a bearing inner pressure ring, a locking screw, a key, and a rolling bearing. The realization of the rotational movement of the locking screw requires a stepping motor and a rolling bearing, the locking screw is driven to rotate by the stepping motor, and the locking nut is tangentially screwed in or out to realize positioning locking and disengagement, the rolling bearing is used for radial positioning and can withstand axial loads, the stepping motor and the locking screw are transmitted by keys, and the positioning lock fixing seat is used for The outer ring of the rolling bearing is fixed. The outer pressure ring of the bearing and the inner pressure ring of the bearing are used to limit the axial displacement of the rolling bearing. A reset spring is installed on the back of the locking nut. One end of the reset spring presses the locking nut and the other end presses the plug. When the locking screw is screwed into the locking nut, the locking nut retreats, the reset 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 reset spring provides thrust for the locking nut to ensure that the locking screw can be reliably screwed into the locking nut. The locking nut transmits the force to the nut fixing seat through the compressed disc spring. The nut fixing seat is connected to the rotating structure. The forward and backward movement of the locking nut drives the trigger block to move forward and backward. After the trigger block is in place, it triggers the in-place switch fixed on the locking nut fixing seat through the in-place switch support seat, and the locking screw stops rotating.

[0006] The locking screw is screwed in or out of the locking nut tangentially, and the locking nut fixing seat and the butterfly spring need to avoid the movement trajectory of the locking screw. A reset spring is installed on the back of the locking nut. When the locking screw is screwed in, the locking nut retreats, and the locking screw smoothly enters the locking nut assembly. When the locking screw is aligned with the locking nut axis, the reset spring provides thrust for the locking nut to ensure 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 in-place switch is adjusted to control the deformation of the compressed butterfly spring when the stepper motor is powered off, thereby controlling the preload force between the locking screw and the locking nut.

[0008] The principle of the present invention is: a novel locking structure with adjustable locking force of the folding and unfolding mechanism, which is divided into 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 reset spring, a plug, a trigger block, an in-position switch, and an in-position switch support seat, and the electric screw includes a stepping motor, a positioning lock fixing seat, a bearing outer pressure ring, a bearing inner pressure ring, a locking screw, a key, and a rolling bearing. The locking screw is driven by the stepping motor to rotate, and the locking nut is screwed in or out tangentially to realize positioning locking and disengagement.

[0009] First, a locking nut assembly is designed. When the locking screw is screwed in or out of the locking nut tangentially, the locking nut fixing seat and the butterfly spring need to avoid the movement trajectory of the locking screw. A reset spring is installed on the back of the locking nut. When the locking screw is screwed in, the locking nut retreats, and the locking screw smoothly enters the locking nut assembly. When the locking screw is aligned with the axis of the locking nut, the reset spring provides thrust for the locking nut to ensure 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, driving the trigger block to move back and forth. By adjusting the position of the position switch, the deformation of the butterfly spring compressed at the front end of the locking nut is controlled when the stepper motor is powered off, thereby controlling the preload force between the locking screw and the locking nut.

[0011] Again, the front end of the locking screw is designed to be a spherical structure to avoid interference between the locking screw and the locking nut during the process of screwing in or out.

[0012] The beneficial effects of the present invention compared with 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 place, which has a simple structure and is safe and reliable.

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

[0015] (3) The present invention has specially designed the locking nut structure to further enhance the reliability of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] FIG1 (a) is a cross-sectional view of a locking nut assembly structure in a locking structure with adjustable locking force for a rotary motion component of the present invention;

[0017] FIG1( b ) is a top view of the locking nut assembly structure in the locking structure of the rotary motion component with adjustable locking force according to the present invention;

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

[0019] The meanings of the reference numerals in the figure are: 1-locking nut fixing seat, 2-butterfly spring, 3-locking nut, 4-reset spring, 5-plug, 6-trigger block, 7-in-place switch, 8-in-place switch support seat, 9-stepping 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 DESCRIPTION

[0020] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms, and the present disclosure should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0021] The invention discusses a locking structure with adjustable locking force. When a rotary motion accessory is in place or disengaged, an electric screw needs to be stably positioned, locked and disengaged with a locking nut.

[0022] FIG. 1( a ) is a cross-sectional view of a locking nut assembly structure in a locking structure with adjustable locking force for a rotary motion component of the present invention, and FIG. 1( b ) is a top view of a locking nut assembly structure in a locking structure with adjustable locking force for a 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 locking structure of the rotary motion component with adjustable locking force 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 reset spring 4, a plug 5, a trigger block 6, an in-position switch 7, and an in-position switch support seat 8, the electric screw includes a stepping motor 9, a positioning lock fixing seat 10, a bearing outer pressure ring 11, a bearing inner pressure ring 12, a locking screw 13, a key 14, and a rolling bearing 15. The realization of the rotational movement of the locking screw 13 requires a stepping motor 9 and a rolling bearing 15. The locking screw 13 is driven by the stepping motor 9 to rotate, and the locking nut 3 is tangentially screwed in or out to realize positioning locking and disengagement. The rolling bearing 15 is used for radial positioning and can withstand axial loads. The stepping motor 9 and the locking screw 13 are transmitted by the key 14. 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 pressure ring of the bearing The pressure ring 12 is used to limit the axial displacement of the rolling bearing 15. A reset spring 4 is installed on the back of the locking nut 3. One end of the reset spring 4 presses the locking nut 3, and the other end presses the plug 5. The plug 5 limits the position of the spring and provides a reaction force of the spring. When the locking screw 13 is screwed into the locking nut 3, the locking nut 3 retreats, the reset 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 reset spring 4 provides thrust for 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 by compressing the butterfly spring 2. The nut fixing seat 1 is connected to the rotating structure. The forward and backward movement of the locking nut 3 drives the trigger block 6 to move forward and backward. After it is in place, the trigger block 6 triggers the in-place switch 7. The in-place switch 7 is fixed to the locking nut fixing seat 1 through the in-place switch support seat 8, and the locking screw 13 stops rotating.

[0024] Among them, the deformation amount of the butterfly spring 2 compressed at the front end of the locking nut 3 when the stepping motor 9 is powered off can be adjusted by adjusting the position of the position switch 7, thereby controlling the preload force between the locking screw 13 and the locking nut 3.

[0025] When the rotating structural member rotates into position, the locking screw 13 is screwed tangentially into or out of the locking nut 3 , and 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 .

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

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

[0028] In the description provided herein, a large number of specific details are described. However, it is understood that embodiments of the present invention can be practiced without these specific details. In some instances, well-known methods, structures and techniques are not shown in detail so as not to obscure the understanding of this description.

[0029] Although the present invention has been described according to a limited number of embodiments, it will be apparent to those skilled in the art, with the benefit of the above description, that other embodiments may be envisioned within the scope of the invention thus described. In addition, it should be noted that the language used in this specification is primarily selected for readability and instructional purposes, rather than for the purpose of explaining or limiting the subject matter of the present invention.

Claims

1. A locking structure with adjustable locking force for a rotary motion component, characterized in that: The invention comprises a locking nut assembly and an electric screw rod, wherein the locking nut assembly comprises a locking nut fixing seat (1), a butterfly spring (2), a locking nut (3), a reset spring (4), a plug (5), a trigger block (6), an in-position switch (7), and an in-position switch support seat (8); the electric screw rod comprises a stepping motor (9), a positioning lock fixing seat (10), a bearing outer pressure ring (11), a bearing inner pressure ring (12), a locking screw (13), a key (14), and a rolling bearing (15); the locking screw (1 The realization of the rotational movement of 3) 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 realize the positioning locking and disengagement. The rolling bearing (15) is used for radial positioning and can withstand axial load. The stepper motor (9) and the locking screw (13) are used to transmit force by a key (14). The positioning lock fixing seat (10) is used to fix the outer ring of the rolling bearing (15), the bearing outer pressure ring (11) and the shaft The inner 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 the locking nut (3) and the other end presses the plug (5). When the locking screw (13) is screwed into the locking nut (3), the locking nut (3) retreats, 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) is locked. The nut (3) provides thrust to ensure that the locking screw (13) is reliably screwed into the locking nut (3). The locking nut (3) transmits force to the nut fixing seat (1) through the compression disc spring (2). The nut fixing seat (1) is connected to the rotary structure. The forward and backward movement of the locking nut (3) drives the trigger block (6) to move forward and backward. After the trigger block (6) is in place, it triggers the in-place switch (7) fixed on the locking nut fixing seat (1) through the in-place switch support seat (8), and the locking screw (13) stops rotating.

2. The locking structure with adjustable locking force of a rotary motion component according to claim 1, characterized in that: By adjusting the position of the position switch (7), the deformation amount of the butterfly spring (2) compressed at the front end of the locking nut (3) is adjusted when the stepping motor (9) is powered off, thereby controlling the pre-tightening force between the locking screw (13) and the locking nut (3).

3. The locking structure with adjustable locking force of a rotary motion component according to claim 1, characterized in that: When the rotary structural member is rotated into position, the locking screw (13) is tangentially screwed into or out of the locking nut (3), and 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 a rotary motion component according to claim 1, characterized in that: The front end of the locking screw (13) is designed to be a spherical structure to prevent interference between the locking screw (13) and the locking nut during the process of screwing in or out.

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