Rotary motion automatic stop mechanism

Abstract

The application discloses a kind of automatic stop mechanisms of rotary motion, including rotating shaft seat, rotating arm, fixed sleeve, thimble, spring, connecting block;Rotating shaft seat is provided with rotating shaft and guide groove, guide groove includes circular slot and through hole, the center of circular slot is on the axis of rotating shaft, through hole is set on circular slot;Rotating arm is provided with center hole, mounting hole, rotating arm is rotatably sleeved on rotating shaft by center hole;Fixed sleeve is installed in mounting hole, and fixed sleeve is provided with vertical hole;The upper shaft section of thimble can be vertically slidably installed in vertical hole, and the lower shaft section of thimble can be slidably placed in guide groove or in through hole;Spring is vertically installed between connecting block and the upper shaft section of thimble upper end;Connecting block is installed in the upper part of vertical hole;In the application, the position of through hole at the end of guide groove can control the position of rotating arm stopping rotary motion;The thimble is automatically inserted into through hole by the continuous pushing force of spring on thimble, and rotary motion is thus automatically stopped.

Description

Technical Field

[0001] This invention relates to the field of unmanned aerial vehicle (UAV) technology, and more particularly to an automatic stop mechanism for rotary motion. Background Technology

[0002] Before launch, UAVs using a cannon-launched method require folding their wings and inserting them into the launch tube to adapt the UAV's shape and structure to the installation space within the tube. After launch, the UAV's wings must automatically deploy to their designed position to ensure the required flight attitude. To address the position locking issue during wing deployment, a stopping mechanism is typically used to halt the deployed wings at the designated position. Several issues need to be addressed with this mechanism and method: first, ensuring automatic position locking, i.e., guaranteeing that the wing deployment movement automatically stops and reaches the desired position; second, the frictional forces generated by the relative movement of various structures during folding / deployment have a certain impact on folding / deployment; and third, ensuring structural simplicity, ease of disassembly, and maintenance.

[0003] Therefore, it is necessary to develop an automatic stop mechanism for rotary motion to solve the above problems. Summary of the Invention

[0004] The purpose of this invention is to design an automatic stop mechanism for rotary motion in order to solve the above-mentioned problems.

[0005] The present invention achieves the above objectives through the following technical solutions:

[0006] An automatic stop mechanism for rotary motion, comprising:

[0007] A rotating shaft seat; the rotating shaft seat is provided with a rotating shaft and a guide groove. The guide groove includes an arc groove and a through hole. The center of the arc groove is on the axis of the rotating shaft, and the through hole is provided on the arc groove.

[0008] Rotary arm; The rotary arm is provided with a center hole and a mounting hole, and the rotary arm is rotatably mounted on the rotating shaft through the center hole;

[0009] Fixing sleeve; The fixing sleeve is installed inside the mounting hole, and a vertical hole is provided inside the fixing sleeve;

[0010] Ejector pin; the upper shaft section of the ejector pin can be slidably installed in the vertical hole, and the lower shaft section of the ejector pin can be slidably placed in the guide groove or in the through hole;

[0011] Spring; the spring is vertically installed between the connecting block and the upper end of the upper shaft section of the ejector pin;

[0012] Connecting block; the connecting block is installed in the upper part of the vertical hole.

[0013] Furthermore, a through hole is provided at one end of the arc groove.

[0014] Specifically, the diameter of the lower section of the mounting hole is smaller than the diameter of the upper section of the mounting hole; the outer surface of the fixing sleeve is in contact with the inner surface of the upper section of the mounting hole.

[0015] Specifically, the inner cavity of the fixing sleeve is a stepped hole, the diameter of the lower hole section of the fixing sleeve is smaller than the diameter of the upper hole section of the fixing sleeve, the diameter of the lower hole section of the fixing sleeve is smaller than the diameter of the through hole, and the center line of the lower hole section of the fixing sleeve is collinear with the center line of the upper hole section of the fixing sleeve; the ejector pin has a stepped shaft structure, the center line of the lower shaft section of the ejector pin is collinear with the center line of the upper shaft section of the ejector pin, the diameter of the lower shaft section of the ejector pin is smaller than the diameter of the lower hole section of the fixing sleeve, the diameter of the upper shaft section of the ejector pin is larger than the diameter of the lower hole section of the fixing sleeve, the diameter of the upper shaft section of the ejector pin is smaller than the diameter of the upper hole section of the fixing sleeve, and the lower shaft section of the ejector pin passes through the lower hole section of the fixing sleeve.

[0016] Furthermore, the distance from the lower end face of the upper shaft section of the ejector pin to the lower end face of the adjusting screw is less than the free length of the spring.

[0017] Preferably, the end surface of the lower shaft section of the ejector pin is an arc surface.

[0018] Furthermore, the lower bottom surface of the arc groove is an arc, and the radius of the lower bottom surface of the arc groove is equal to the distance from the center line of the upper shaft section of the ejector pin to the center line of the center hole of the rotating arm.

[0019] Preferably, a first annular step is formed on the upper shaft section of the ejector pin, a second annular step is formed on the lower end of the connecting block, the lower end of the spring is fitted on the first annular step, and the upper end of the spring is fitted on the second annular step.

[0020] Preferably, the connecting block is an adjusting screw, and the upper inner wall of the upper hole section of the fixing sleeve is a screw hole, and the adjusting screw and the fixing sleeve are connected by threads through the screw hole.

[0021] The beneficial effects of this invention are as follows:

[0022] First, the stop position of the rotating arm is controllable. By setting the position of the through hole at the end of the guide groove, the position where the rotating arm stops rotating can be controlled. Second, automatic stopping of rotational movement is achieved. Through the continuous pushing force of the spring on the ejector pin, the ejector pin automatically extends into the through hole, thus automatically stopping the rotational movement. Third, unlocking the stop position is convenient. By inserting a screwdriver or other tool into the through hole at the end of the guide groove and pushing the ejector pin out of the through hole, the stop position of the rotating arm can be unlocked. Fourth, the rotational movement is less affected by the stop mechanism. The contact method between the ejector pin end and the guide groove adopts a spherical and arc-shaped surface, and the friction has little impact on the rotational movement. Fifth, the force of the spring on the ejector pin is adjustable. By adjusting the position of the adjusting screw inserted into the fixing sleeve, the spring compression can be adjusted, thereby adjusting the force of the spring on the ejector pin. Sixth, maintenance and replacement are convenient and the operation is simple. After unscrewing the adjusting screw out of the fixing sleeve, the ejector pin and spring can be maintained and replaced. Attached Figure Description

[0023] Figure 1 This is a cross-sectional view of the present invention;

[0024] Figure 2 This is a schematic diagram of the structure of the rotating shaft seat in this invention;

[0025] Figure 3 This is a schematic diagram of the rotating arm in this invention;

[0026] Figure 4 This is a schematic diagram of the structure of the fixing sleeve in this invention;

[0027] Figure 5 This is a schematic diagram of the ejector pin structure in this invention;

[0028] Figure 6 This is a schematic diagram of the adjusting screw in this invention;

[0029] In the figure; 1, pivot seat; 1-1, pivot; 1-1-1, outer surface of pivot; 1-2, guide groove; 1-2-1, arc groove; 1-2-1-1, lower bottom surface of arc groove; 1-2-2, through hole; 2, pivot arm; 2-1, center hole; 2-1-1, inner surface of center hole; 2-2, mounting hole; 2-2-1, lower section of mounting hole; 2-2-2, upper section of mounting hole; 2-2-2-1, inner surface of upper section of mounting hole; 3, fixed... 3-1, Lower hole section of the fixed sleeve; 3-2, Upper hole section of the fixed sleeve; 3-2-1, Lower bottom surface of the upper hole section of the fixed sleeve; 3-3, Outer surface of the fixed sleeve; 4, Ejector pin; 4-1, Lower shaft section of the ejector pin; 4-1-1, Arc surface of the lower shaft section of the ejector pin; 4-2, Upper shaft section of the ejector pin; 4-2-1, Upper end face of the upper shaft section of the ejector pin; 4-2-2, Lower end face of the upper shaft section of the ejector pin; 5, Spring; 6, Adjusting screw; 6-1, Lower end face of the adjusting screw. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0031] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0032] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0033] In the description of this invention, it should be understood that the terms "upper," "lower," "inner," "outer," "left," "right," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are only used to facilitate the description of this invention and to simplify the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0034] Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0035] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, terms such as "set" and "connection" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0036] The specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0037] When used on drones, the swivel arm 2 is used to connect the drone's folding wings, and the swivel seat 1 is fixedly installed on the drone's body.

[0038] like Figure 1 As shown, an automatic stop mechanism for rotary motion includes:

[0039] Rotary shaft seat 1; Rotary shaft seat 1 is provided with a rotating shaft 1-1 and a guide groove 1-2. The guide groove 1-2 includes an arc groove 1-2-1 and a through hole 1-2-2. The center of the arc groove 1-2-1 is on the axis of the rotating shaft 1-1, and the through hole 1-2-2 is provided on the arc groove 1-2-1.

[0040] Rotary arm 2; Rotary arm 2 is provided with a central hole 2-1 and a mounting hole 2-2. Rotary arm 2 is rotatably mounted on rotating shaft 1-1 through the central hole 2-1; The outer surface 1-1-1 of the rotating shaft is in contact with the inner surface 2-1-1 of the central hole;

[0041] Fixing sleeve 3; The fixing sleeve 3 is installed in the mounting hole 2-2, and a vertical hole is provided in the fixing sleeve 3;

[0042] Ejector pin 4; The upper shaft section 4-2 of the ejector pin is vertically slidably installed in the vertical hole, and the lower shaft section 4-1 of the ejector pin is slidably placed in the guide groove 1-2 or in the through hole 1-2-2;

[0043] Spring 5; Spring 5 is vertically installed between the connecting block and the upper end of the upper shaft section 4-2 of the ejector pin;

[0044] Connecting block; the connecting block is installed in the upper part of the vertical hole.

[0045] like Figure 2 As shown, in some embodiments, a through hole 1-2-2 is provided at one end of the arc groove 1-2-1.

[0046] like Figure 1 and 3 As shown, in some embodiments, the diameter of the lower hole section 2-2-1 of the mounting hole is smaller than the diameter of the upper hole section 2-2-2 of the mounting hole; the outer surface 3-3 of the fixing sleeve contacts the inner surface 2-2-2-1 of the upper hole section of the mounting hole.

[0047] like Figure 1 and 4As shown in Figure 5, in some embodiments, the inner cavity of the fixing sleeve 3 is a stepped hole, the diameter of the lower hole section 3-1 of the fixing sleeve is smaller than the diameter of the upper hole section 3-2 of the fixing sleeve, the diameter of the lower hole section 3-1 of the fixing sleeve is smaller than the diameter of the through hole 1-2-2, and the center line of the lower hole section 3-1 of the fixing sleeve and the center line of the upper hole section 3-2 of the fixing sleeve are collinear; the ejector pin 4 is a stepped shaft structure, the center line of the lower shaft section 4-1 of the ejector pin and the center line of the upper shaft section 4-2 of the ejector pin are collinear, the diameter of the lower shaft section 4-1 of the ejector pin is smaller than the diameter of the lower hole section 3-1 of the fixing sleeve, the diameter of the upper shaft section 4-2 of the ejector pin is larger than the diameter of the lower hole section 3-1 of the fixing sleeve, the diameter of the upper shaft section 4-2 of the ejector pin is smaller than the diameter of the upper hole section 3-2 of the fixing sleeve, and the lower shaft section 4-1 of the ejector pin passes through the lower hole section 3-1 of the fixing sleeve.

[0048] In some embodiments, the distance from the lower end face 4-2-2 of the upper shaft section of the ejector pin to the lower end face 6-1 of the adjusting screw is less than the free length of the spring 5.

[0049] like Figure 5 As shown, in some embodiments, the end surface of the lower shaft segment 4-1 of the ejector pin is an arc surface, and the radius of the arc surface is equal to the radius of the lower shaft segment 4-1 of the ejector pin.

[0050] In some embodiments, the lower bottom surface 1-2-1-1 of the arc groove is an arc, and the radius of the lower bottom surface 1-2-1-1 of the arc groove is equal to the distance from the center line of the upper shaft section 4-2 of the ejector pin to the center line of the center hole 2-1 of the rotating arm 2.

[0051] like Figure 1 and 5 As shown in Figure 6, in some embodiments, a first annular step is formed on the upper shaft section 4-2 of the ejector pin, a second annular step is formed on the lower end of the connecting block, the lower end of the spring 5 is fitted on the first annular step, and the upper end of the spring 5 is fitted on the second annular step.

[0052] like Figure 6 As shown, in some embodiments, the connecting block is an adjusting screw 6, and the upper inner wall of the upper hole section 3-2 of the fixing sleeve is a screw hole. The adjusting screw 6 and the fixing sleeve 3 are connected by a thread through the screw hole.

[0053] In some embodiments, the distance from the lower bottom surface 1-2-1-1 of the arc groove to the lower bottom surface 3-2-1 of the upper hole section of the fixing sleeve is less than the distance from the arc surface 4-1-1 of the lower shaft section of the ejector pin to the upper end surface 4-2-1 of the upper shaft section of the ejector pin.

[0054] When the rotating arm 2 rotates around the rotating shaft 1-1 of the rotating shaft seat 1, it causes the arc surface 4-1-1 of the lower shaft section of the ejector pin to slide within the guide groove 1-2. When the arc surface 4-1-1 of the lower shaft section of the ejector pin slides to the position of the through hole 1-2-2, the end shaft section of the ejector pin 4 extends into the through hole 1-2-2, and the rotating arm 2 stops rotating. The stop position of the rotating arm 2 can be adjusted by adjusting the position of the through hole 1-2-2.

[0055] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. An automatic stop mechanism for rotary motion, characterized in that, include: A rotating shaft seat; the rotating shaft seat is provided with a rotating shaft and a guide groove. The guide groove includes an arc groove and a through hole. The center of the arc groove is on the axis of the rotating shaft, and the through hole is provided on the arc groove. Rotary arm; The rotary arm is provided with a center hole and a mounting hole, and the rotary arm is rotatably mounted on the rotating shaft through the center hole; Fixing sleeve; The fixing sleeve is installed inside the mounting hole, and a vertical hole is provided inside the fixing sleeve; Ejector pin; the upper shaft section of the ejector pin can be slidably installed in the vertical hole, and the lower shaft section of the ejector pin can be slidably placed in the guide groove or in the through hole; Spring; the spring is vertically installed between the connecting block and the upper end of the upper shaft section of the ejector pin; Connecting block; the connecting block is installed in the upper part of the vertical hole; the connecting block is an adjusting screw, and the upper inner wall of the upper hole section of the fixing sleeve is a screw hole, and the adjusting screw and the fixing sleeve are connected by threads through the screw hole.

2. The rotary motion automatic stop mechanism according to claim 1, characterized in that, The through hole is located at one end of the arc groove.

3. The rotary motion automatic stop mechanism according to claim 1, characterized in that, The diameter of the lower section of the mounting hole is smaller than the diameter of the upper section of the mounting hole; the outer surface of the fixing sleeve is in contact with the inner surface of the upper section of the mounting hole.

4. The automatic stop mechanism for rotary motion according to claim 1, characterized in that, The inner cavity of the fixed sleeve is a stepped hole. The diameter of the lower hole section of the fixed sleeve is smaller than the diameter of the upper hole section of the fixed sleeve, and the diameter of the lower hole section of the fixed sleeve is smaller than the diameter of the through hole. The center line of the lower hole section of the fixed sleeve is collinear with the center line of the upper hole section of the fixed sleeve. The ejector pin has a stepped shaft structure. The center line of the lower shaft section of the ejector pin is collinear with the center line of the upper shaft section of the ejector pin. The diameter of the lower shaft section of the ejector pin is smaller than the diameter of the lower hole section of the fixed sleeve, and the diameter of the upper shaft section of the ejector pin is larger than the diameter of the lower hole section of the fixed sleeve. The diameter of the upper shaft section of the ejector pin is smaller than the diameter of the upper hole section of the fixed sleeve. The lower shaft section of the ejector pin passes through the lower hole section of the fixed sleeve.

5. The rotary motion automatic stop mechanism according to claim 4, characterized in that, The distance from the lower end face of the upper shaft section of the ejector pin to the lower end face of the adjusting screw is less than the free length of the spring.

6. The rotary motion automatic stop mechanism according to claim 4, characterized in that, The lower shaft section of the ejector pin has an arc-shaped end surface.

7. The rotary motion automatic stop mechanism according to claim 6, characterized in that, The bottom surface of the arc groove is an arc, and the radius of the bottom surface of the arc groove is equal to the distance from the center line of the upper shaft section of the ejector pin to the center line of the center hole of the rotating arm.

8. The rotary motion automatic stop mechanism according to claim 4, characterized in that, The upper shaft section of the ejector pin is formed with a first annular step, the lower end of the connecting block is formed with a second annular step, the lower end of the spring is fitted on the first annular step, and the upper end of the spring is fitted on the second annular step.

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