A rotary self-resetting device

Abstract

The present invention relates to a rotary self-resetting device, which belongs to the field of reset devices, solves the problem of limited rotation angle and inability to achieve 360-degree rotation in the prior art, and adopts a technical solution comprising a guide shaft, a reset slider, a cam, an elastic member, and a limiter. A cam is arranged in the middle of the reset slider, and the cam is movably connected to the reset slider. Guide shafts are respectively passed through the two sides of the reset slider and are movably connected to the guide shafts. The two ends of the guide shaft are respectively fixed to the limiters, and an elastic member is mounted on the guide shaft between the reset slider and the limiter. The structure is compact, cost-saving, and easy to use.

Description

Technical Field

[0001] The invention relates to the field of resetting devices, and in particular to a rotating self-resetting device. Background Art

[0002] The reset device has always been an indispensable part in the machinery industry. In the prior art, most of the reset devices are linear, and there are few rotary reset devices. The existing Chinese invention patent is named "Automatic reset universal wheel", patent publication number: CN203713418U, publication date: 20140716, disclosure content: including a fork assembly and a pulley, the fork assembly includes a fork seat, a bearing, a screw, and a positioning cover, the pulley is rotatably arranged on the fork head of the fork seat through a rotating shaft, the fork seat is rotatably arranged on the screw through a bearing, the positioning cover is sleeved on the screw and presses the bearing, and an elastic reset mechanism is provided between the positioning cover and the fork seat to automatically reset the fork seat. The elastic reset mechanism uses two return springs to return to the original position. The rotation angle of this universal wheel is limited and it cannot rotate 360 ​​degrees. Summary of the invention

[0003] The purpose of the present invention is to provide a rotating self-resetting device to solve the problem of limited rotation angle and inability to achieve 360-degree rotation in the prior art, with compact structure, cost saving, and ease of use.

[0004] To achieve the above object, the present invention provides the following technical solutions:

[0005] A rotary self-resetting device comprises a guide shaft, a reset slider, a cam, an elastic member and a limit member, wherein a cam is arranged in the middle of the reset slider, the cam is movably connected to the reset slider, guide shafts penetrate through both sides of the reset slider respectively and are movably connected to the guide shafts, both ends of the guide shafts are respectively fixedly connected to the limit members, and an elastic member is sleeved on the guide shaft between the reset slider and the limit member.

[0006] Preferably, the reset slider includes a left-right symmetrical slider bracket.

[0007] Preferably, the slider bracket includes a slider bracket A, a slider bracket B, an arc-shaped groove, a rectangular groove, a base and a driven pulley, the slider bracket A is fixedly connected to the slider bracket B, a rectangular groove is provided in the middle of the corresponding surfaces of the slider bracket A and the slider bracket B, a base is provided at the bottom of the rectangular groove, both ends of the driven pulley shaft are respectively fixedly connected to the base, arc-shaped grooves are provided on both sides of the corresponding surfaces of the slider bracket A and the slider bracket B, and the guide shaft passes through the arc-shaped groove.

[0008] Preferably, the upper end of the cam includes a concave arc R and a convex arc R1 intersecting at both ends of the concave arc R, the intersection point of the concave arc R and the convex arc R1 is point B, the intersection point of the connected convex arc R1 is point A, the arc center of the concave arc R is point C, the lower end of the cam is a rectangular columnar body, and a countersunk hole is provided in the middle of the cam.

[0009] Preferably, the limiting member includes a nut and a nut, and the nut includes a compression nut and a cross-opening nut.

[0010] Preferably, the elastic member is a return spring.

[0011] Preferably, the nut is connected to the guide shaft via threads and / or pins and / or retaining springs and / or adhesive bonding.

[0012] Beneficial effects: The present invention is different from the prior art in that:

[0013] The invention can be rotated and reset to a designated position at any position after being rotated several times at random; the structure is compact, cost-effective, and the rotation and reset angle can be changed arbitrarily; when the universal wheel of the invention is used on the ground, it is no different from a normal universal wheel, and when the universal wheel leaves the ground, it immediately returns to the designated position. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The following drawings of the embodiments of the present invention are used as part of the present invention for understanding the present invention. The embodiments of the present invention and their description are shown in the drawings to explain the principles of the present invention. In the drawings,

[0015] Figure 1 It is a schematic diagram of the structure of the present invention;

[0016] Figure 2 Schematic diagram of the reset slider of the present invention

[0017] Figure 3 Schematic diagram of the slider bracket A of the present invention

[0018] Figure 4 Schematic diagram of the slider bracket B of the present invention

[0019] Figure 5 Schematic diagram of the driven pulley of the present invention

[0020] Figure 6 A perspective view of the fixed cam of the present invention

[0021] In the figure: 1 clamping end cap, 2 guide shaft, 3 reset slider, 4 cam, 5 reset spring, 6 nut, 7 slider bracket A, 8 slider bracket B, 9 driven pulley, 10 point A, 11 point B, 12 point C, 13 concave arc R, 14 convex arc R1, countersunk hole 15. DETAILED DESCRIPTION

[0022] In the following description, a large number of specific details are provided to provide a more thorough understanding of the present invention. However, it is obvious to those skilled in the art that the embodiments of the present invention can be implemented without one or more of these details. In other examples, in order to avoid confusion with the embodiments of the present invention, some technical features well known in the art are not described.

[0023] In order to fully understand the embodiments of the present invention, detailed structures will be presented in the following description. Obviously, the implementation of the embodiments of the present invention is not limited to the specific details familiar to those skilled in the art. The preferred embodiments of the present invention are described in detail below, but in addition to these detailed descriptions, the present invention may also have other embodiments.

[0024] like Figure 1-6 A rotating self-resetting device shown includes a clamping end cap 1, a guide shaft 2, a reset slider 3, a cam 4, a reset spring 5, and a nut 6. Both ends of the guide shaft 2 are provided with external threads, and the inner side of the nut 6 is provided with an internal thread. The nut 6 is a clamping nut or a cross open nut or a fixed nut of other shapes. The nut 6 is threadedly connected to the guide shaft 2. The connection method of the nut 6 and the guide shaft 2 can also adopt other connection methods such as pin connection, spring connection, adhesive connection, etc. The clamping end cap 1 is fixedly connected to the guide shaft 2 by a nut 6. The clamping end cap 1 can be used to fix a rotating component with a cylindrical outer end surface. The clamping end cap 1 can also be in the shape of a boss, which can be used to fix a rotating component with a flat outer end surface. It can also be in other shapes and used to fix other types of rotating components. The two ends of the reset slider 3 are respectively penetrated by the guide shaft 2, and the guide shaft 2 is movably connected to the reset slider 3. A reset spring 5 is mounted on the guide shaft 2, one end of the reset spring 5 is connected to the clamping end cap 1, and the other end thereof is connected to the reset slider 3. A fixed cam 4 is provided at the center of the reset slider 3, and the fixed cam 4 is slidably connected to the reset slider 3.

[0025] like Figure 2-5 As shown, the reset slider 3 includes a left-right symmetrical slider bracket 31, the slider bracket 31 includes a driven pulley 9 and a slider bracket A311 and a slider bracket B312 for fixing the driven pulley 9, the slider bracket A311 is located above the slider bracket B312, and arc grooves 32 are respectively provided at both ends of the opposite sides of the slider bracket A311 and the slider bracket B312, and the guide shaft 2 passes through the arc groove, and rectangular grooves 33 are respectively provided in the middle parts of the opposite sides of the slider bracket A311 and the slider bracket B312, and a base 34 is provided at the bottom of the rectangular groove 33, the driven pulley 9 is located in the rectangular groove 33 and is mounted on the shaft 35, and the two ends of the shaft 35 are respectively connected to the base 34.

[0026] like Figure 6 As shown, the upper end of the cam 4 is symmetrical front to back and left to right, including a concave arc R13 and a convex arc R114 intersecting at both ends of the concave arc R13, the intersection of the concave arc R13 and the convex arc R114 is set as point B 11, the other end of the convex arc R1 is point A 10, and the arc center of the concave arc R is point C 12. The lower end of the cam 4 is a rectangular columnar body, which can cooperate with the rectangular bayonet to prevent rotation. There is a cylindrical countersunk hole in the middle of the cam 4. When in use, the cam 4 is installed in the rectangular bayonet corresponding to the fixing component through a cylindrical head bolt.

[0027] Implementation principle:

[0028] First, fix the guide shaft 2 on the rotating component and the cam 4 on the fixed component. Alternatively, the cam 4 can be fixed on the rotating component and the guide shaft 2 can be fixed on the fixed component, depending on the specific situation. The following is the implementation principle of using the fixed component for fixing and the rotating component for rotation. When the rotating component rotates to different positions, the driven pulley 9 on the reset slider 3 will roll to the corresponding position on the outer side of the cam 4. Next, we will analyze point A, point B, and point C of the cam. First, the two reset sliders 3 are respectively subjected to the inward elastic force of the reset springs 5 ​​at both ends of the guide shaft 2. From point A to point B, the outer diameter of the cam 4 gradually decreases, so the contact surface of the driven pulley 9 is not perpendicular to the direction of the elastic force of the reset spring 5, forming an inclined surface, generating a component force along the inclined surface, and generating acceleration; but this section of convex arc R1 is close to a perfect circle, and the inclined surface force is small, which allows the rotating component to be used smoothly in the rotation range from point A to point B. While having a self-reset function, To achieve better user experience; at point B, the curvature of the outer diameter of the cam 4 changes suddenly, and in the force analysis of the driven pulley 9 and the contact surface, the angle between the contact surface and the elastic direction of the return spring 5 becomes smaller, the component force along the inclined surface increases, the acceleration becomes larger, and the quick return characteristic is reflected during use, and the reset effect is good; from point B to point C, the angle between the contact surface of the driven pulley 9 and the elastic direction of the return spring 5 gradually increases until it is vertical, and the component force along the inclined surface also gradually decreases, the acceleration decreases, and the angle is a right angle at point C, the acceleration is zero, and the arc surface from point B to point C forms an arc that matches the driven pulley 9, which can reduce the amount of back and forth shaking of the rotating part after it returns to the designated reset point C during use.

[0029] The present invention has been described through the above-mentioned embodiments, but it should be understood that the above-mentioned embodiments are only for the purpose of example and description, and are not intended to limit the present invention to the described embodiments. In addition, it can be understood by those skilled in the art that the present invention is not limited to the above-mentioned embodiments, and more variations and modifications can be made according to the teachings of the present invention, and these variations and modifications all fall within the scope of the protection claimed by the present invention.

Claims

1. A rotary self-resetting device, characterized in that: The invention comprises a guide shaft, a reset slider, a cam, an elastic member, and a limit member. A cam is arranged in the middle of the reset slider, and the cam is movably connected to the reset slider. The reset slider comprises a left-right symmetrical slider bracket, and the slider bracket comprises a slider bracket A, a slider bracket B, an arc groove, a rectangular groove, a base, and a driven pulley. The slider bracket A is fixedly connected to the slider bracket B. A rectangular groove is arranged in the middle of the corresponding surfaces of the slider bracket A and the slider bracket B. A base is arranged at the bottom of the rectangular groove. The two ends of the shaft of the driven pulley are respectively fixedly connected to the base. Arc grooves are arranged on both sides of the corresponding surfaces of the slider bracket A and the slider bracket B. shaped groove, the guide shaft passes through the arc-shaped groove, guide shafts are respectively passed through on both sides of the reset slider and are movably connected with the guide shafts, the two ends of the guide shaft are respectively fixed to the limit members, and an elastic member is mounted on the guide shaft between the reset slider and the limit member, the upper end of the cam is symmetrical front to back and left to right, including a concave arc R and a convex arc R1 intersecting at both ends of the concave arc R, the intersection point of the concave arc R and the convex arc R1 is point B, the intersection point of the connected convex arc R1 is point A, the arc center of the concave arc R is point C, the lower end of the cam is a rectangular columnar body, and a countersunk hole is provided in the middle of the cam.

2. A rotary self-resetting device according to claim 1, characterized in that: The limiting member includes a nut and a nut, and the nut includes a compression nut and a cross open nut.

3. A rotary self-resetting device according to claim 1, characterized in that: The elastic member is a return spring.

4. A rotary self-resetting device according to claim 2, characterized in that: The nut is connected to the guide shaft via threads and / or pins and / or retaining springs and / or adhesive bonding.

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